HUB UNIT SUPPORT

专利摘要:
The present invention relates to a hub unit support in which the cover (39) can be firmly fitted with an outer ring member (34), making it difficult for foreign bodies to enter through the water drainage hole (73) that is formed in the roof (39). The cover (39) covering the inner end section in the axial direction of the hub unit holder (33) comprises a disc section (65), a small cylindrical section (66) that is curved in the axial direction, the from an outer perimeter end section of the disc section (65) and a large diameter cylindrical section (67). In particular, a cut and raised section (71), which is cut and raised towards the inside, in the radial direction, is formed in the small cylindrical section (66). A water drainage hole (73) is provided, which passes through the inner part to the outer part of the cover (3), in the part that is cut and separated from the small diameter cylindrical section (66) by that cut and raised section (71).
公开号:BR112012004313B1
申请号:R112012004313-7
申请日:2010-10-01
公开日:2021-01-12
发明作者:Yuji Nakamura；Yoshiro Kaneko
申请人:Nsk Ltd；
IPC主号:

专利说明:

[0001] The present invention relates to a hub unit support for supporting the wheels of a car, so that it can rotate freely with respect to the suspension. More specifically, the present invention relates to a hub unit support comprising a cover which, together with the cover of the inner end section, in the axial direction of the outer ring member and the inner ring member, and preventing foreign matter enters the interior, it has a water drainage hole to discharge foreign matter that entered from the outside. BACKGROUND OF THE TECHNIQUE
[0002] The hub unit supports comprising a bearing support unit are used to support the wheels of a car, so that it can rotate freely with respect to the suspension. Recently, rotational speed detectors to detect the rotational speed of the wheels have been installed on this type of hub unit support, with the control of anti-lock brake systems being widely implemented.
[0003] As an example of this type of hub support unit with a rotational speed detector, a structure, such as that illustrated in figure 24, is shown in patent JP2005-090638. The hub unit support with rotational speed detector of that first example of conventional construction comprises a hub unit support 1 and a rotational speed detector 5, and the hub unit support 1 comprises an outer ring member 2, a hub 3, which is an inner ring member, and a plurality of spheres 4, which are rolling elements.
[0004] The outer ring member 2 has a plurality of outer raceway 6 formed around its circumferential surface, and a stationary side flange 7 around the outer circumferential surface. The outer ring member 2 corresponds to a stationary ring that is supported by the suspension joint (not shown in the figure) and does not rotate during operation.
[0005] The hub 3 is a combination of a main hub 8 and an inner ring 9 and has a plurality of inner raceways 10 formed around the outer circumferential surface and is supported on the inner diameter side of the outer ring member2, such that is concentric with the outer ring member 2. A rotating side flange 11 to support the wheel is formed on a part of the outer end in the axial direction of the central hub 8 that protrudes more outwardly, in the axial direction, than the a- cover on the outer end, in the axial direction of the outer ring member 2. In addition, the SPLINE 13 holes for making a SPLINE fit with the drive shaft (not shown in the figure) which is attached to the outer end surface, in the axial direction of an outer ring 12 of a constant speed joint is provided in the central section of the main hub 8. A plurality of spheres 4 is located between each of the external raceways 6 and the internal raceways 10, of mod o to be able to rotate freely. The outer part in the axial direction is defined as the side towards the outer part in the direction of the width of the vehicle body when installed in the suspension, and the inner part in the axial direction is defined as the side that is close to the central section in the direction of vehicle body width.
[0006] A seal ring 14 is provided between the opening section at the outer end in the axial direction of the outer ring member 2 and the circumferential surface of the middle section in the axial direction of the main hub 8. That seal ring 14 covers the opening at the outer end in the axial direction of the installation space of the bearing element 15 where the balls 14 are located and prevents the grease that is inside that space 15 from leaking to the outside, and prevents foreign body from entering the space 15 On the other hand, a combined seal ring 16 is provided between the part around the outer circumferential surface in the inner end section in the axial direction of the inner ring 9 which is separated towards the inner part in the axial direction away from the inner groove 10 which is formed around the inner ring 9 and the inner circumferential surface in the inner end section in the axial direction of the outer ring member 2 and covers the opening at the inter end in the axial direction of the space 15.
[0007] A cover 17 is secured around the outside of the inner end section in the axial direction of the outer ring member 2. This cover 17 is formed in a circular ring shape by pressing on the metal plate, and a sealing member 18 it is done using an elastic material that is fastened around the inner end of the inner end in the axial direction. The ends of the tip ends of a plurality of sealing lips that are formed on the sealing member 18 come in sliding contact around the entire circumferential surface and the stepped surface on the outer end section in the axial direction of the outer ring 12 for a constant speed joint.
[0008] On the other hand, the rotational speed detector 5 comprises an encoder 19 and a sensor 20. The encoder 19 is such that the characteristics of the inner surface in the axial direction, which is the detected surface, alternate at uniform intervals in the circumferential direction, is supported and secured in such a way that it is eccentric with the cube 3 and rotates together with the cube 3. In the example in the figures, an encoder 19, which is made using them permanent with S poles and alternating N poles around the surface internal in the axial direction, it is attached to the internal surface in the axial direction of the projection ring 21 of the combined sealing ring 16. In addition, the sensor 20 has a magnet detection element such that the Hall element, or element of magnetic resistance which is provided in a detection section and is supported by and attached to the cover 17. In this condition, the detection section of the sensor 20 faces the internal surface in the axial direction of the encoder 19. In addition, a detection steel 22 which is located in the detection section of encoder 19 and the sensor 20 is such that the opening at the inner end in the axial direction is covered by the sealing member 18 and the opening at the outer end in the axial direction is covered by the ring combined seal 16.
[0009] With the first example of conventional construction of a hub unit support 1, the wheel attached to the hub 3 can be supported in such a way that it rotates freely with respect to the suspension that supports the outer ring member 2. In addition, as the encoder 19 rotates together with hub 3 as the wheel rotates, poles N and S on the detected surface of encoder 19 alternate when passing the detection section of sensor 20. As a result, the direction of the magnetic flux flowing in the element magnetic detection of sensor 20 changes and the characteristic of that magnetic detection element changes alternatively. The frequency at which the characteristics of the magnetic sensing element changes in this way is proportional to the rotational speed of cube 3, so, by sending the sensing signal from sensor 20 to a controller (not shown in the figure), it is possible to perform ABS control or Proper TCS. In addition, in the case of the first example of conventional construction, the detection space 22 can be closed from the external space by the sealing member 18 which is attached to the cover 17. Therefore, it is possible to prevent foreign matter, such as sand or small stones, go in and get caught between the inner surface in the axial direction of the encoder 19 and the detection section of the sensor 20, then it is possible to protect the encoder 19 and the sensor 20 from the danger of being damaged. As a result, the reliability of rotational speed detection can be maintained and adequate ABS and TCS control is possible.
[0010] However, even in the case of the first example of conventional construction, there is a possibility of moisture or small particles entering the detection space 22 through a small space between the sealing member 18 and the outer ring 12 of the constant speed joint, or through a small space between the cover 17 and the outer ring member 2. Therefore, when the holder is used for a long period of time, foreign particles can accumulate within the detection space 22, which causes a drop in the reliability of the rotational speed detection.
[0011] For this problem, as explained in JP2008-175382 (A), JP2005-140320 (A), JP2005-331429 (A) and JP2005-009525 (A), a water drain hole is installed. Figure 25 shows a second example of the conventional construction of the cube unit support 1 which is shown in JP2008-175382 (A). In the case of this second example of conventional construction, a water drainage hole 23 is formed in the part of a cover 17 which is attached to the end section of the inner part in the axial direction of the outer ring member 2 which is located at the lower end and during operation. More specifically, the cover 17a comprises a large diameter cylindrical section 24 for fastening around the inner end section in the axial direction of the outer ring member 2, a circular disk shaped circular ring section 25 that curves at an angle straight towards the inner part in the radial direction of the inner end section in the axial direction of the large diameter cylindrical section 24 and a small diameter cylindrical section 26 that curves at a right angle towards the inner part in the axial direction of the large section inner end in the radial direction of the circular disk section 25. The water drain hole 23 is formed in the inner half section in the axial direction of the large diameter cylindrical section 24, so as to pass through the large diameter cylindrical section 24, connecting the inside and outside of the cover 17.
[0012] In this second example of conventional construction, foreign matter, such as moisture or tiny particles that have entered the detection space 22 can be discharged into the external space through the water drain hole 23. Therefore, it is possible to prevent foreign matter from accumulating in the part detection space 22 and thus it is possible to maintain the reliability of the detection of rotational speed. However, it is omitted in the figure, in the case of the construction of the invention presented in JP2005-140320 (A), JP2005-331429 (A) and JP2005-009525 (A) also, a water drainage hole is formed in the cover part which is located at the bottom of the cover during operation. Therefore, as in the case of the second example of conventional construction, it is possible to discharge foreign matter that entered the detection space in the external space.
[0013] Incidentally, in any construction described in JP2008-175382 (A), JP2005-140320, JP2005-331429 (A) and JP2005-009525 (A), including the second example of conventional construction, the sole purpose of the water drain hole is discharge foreign matter into the outer space, the idea of preventing foreign matter from entering the outer space through the water drainage hole not being particularly considered. In other words, when foreign matter, such as water, from the car wash, or dirty water that is thrown on the vehicle during the operation, a lot of foreign matter is close to the cover 17, on the bottom. As can be seen clearly in figure 25, a water drainage hole 23 that is formed in the cover 17a is a simple hole that is formed in the lower section of the large diameter cylindrical section 24, as seen from the bottom of the vehicle. , the entire opening section of the water drain hole 23 being exposed. Consequently, it is easy for foreign matter, such as dirty water, to enter the inner part of the cover 17 a through the water drain hole 23. Therefore, there is a possibility to decrease the reliability of the rotational speed direction due to the foreign matter that adheres to the inner surface in the axial direction of the encoder and to the sensor detection section 20. In addition, there is a possibility that the resistance of the part of the cover 17 that is fitted around the outer ring member 2 decreases with the location where the water drain hole 23. Related literature Related patent Patent literature 1 JP2005-090638 (A) Patent literature 2 JP2008-175382 (A) Patent literature 3 JP 2005-140320 (A) Patent literature 4 JP 2005 -331429 (A) Patent literature 5 JP 205 - 009525 (A) Summary of the Invention Problem to be solved by the invention
[0014] In consideration of the above problem, the inventors tried to perfect the construction of the water drainage hole that is formed in the cover, as shown in figures 26 to 31. In this case, the support unit 1 comprises a cover 17b, a cylindrical section in diameter large 27, a side wall section 28, a small diameter cylindrical section 29, a circular disk section 30 and an internal diameter cylindrical section 31.
[0015] The large diameter cylindrical section 27 is fitted and secured around the end section in the axial direction of the outer ring member 2. The side wall section 28 is formed by curving from the inner end section in the radial direction of the section large diameter cylindrical 27, at a right inward angle in the radial direction, and except for the parts in the circumferential direction (the parts at the top end and the bottom end in operating condition), the outer surface in the axial direction contacts the surface at the end internal in the axial direction of the outer ring member 2. The small diameter cylindrical section 29 is formed by bending from the end section in the radial direction of the side wall section 28 at the right angle inward in the axial direction. The circular disk section 30 is formed by curving from the inner end section in the axial direction of the small diameter cylindrical section 29 at a right angle into the radial direction. The inner diameter cylindrical section 31 is formed by curving from the inner end section in the radial direction of the circular disk section 30 at right angles outward in the axial direction and is located on the inside in the radial direction of the small cylindrical section 29 .
[0016] A bulky section 32 is formed having the side wall section part of the cover 17b located at the bottom end on the BULGE in the operating condition inward in the axial direction, and the water drainage hole 23a is formed in a condition that passes through the surfaces in both the internal and external volume section 32.
[0017] As shown in figure 28, in the case of construction, even when the cover 17b is seen from the bottom of the vehicle, the cover section of the water drain hole 23a is not exposed. Therefore, it becomes difficult for foreign matter, such as dirty water, which is splashed during vehicle operation when it enters the cover 17b. In addition, in the case of water droplets that move in a spiral form, rising, without the action of wind, around the tire caused also by rotation of the tire, the lateral surface of the outer perimeter of volume section 32 is covered, so as to make it difficult for foreign bodies to enter the roof 17b. Figure 29 illustrates the construction where the lateral surfaces in the circumferential direction of the volume section 32 are raised at almost direct angles inward, in the axial direction. However, as the shape of this part, adopting inclined surfaces that are inclined in a direction such that the width of the opening section becomes narrow towards the inner part in the axial direction, as illustrated in figures 30 and 31 A, or surfaces curves, as shown in figure 31B, the air flow can be rectified so as to increase the effect of preventing drops of water from entering.
[0018] However, in the case of this construction, it is necessary to form the volume section 32 on the roof 17b, so it is necessary to use a highly ductile material, such as the material for the roof 17b, which, in addition to reducing the freedom of material selection, also increases the processing cost. In addition, for a covering 17b made using a highly ductile material, there is the problem that it is not possible to sufficiently maintain the strength of the fit with the outer ring member 12. Therefore, the practical implementation of this construction is considered to be difficult.
[0019] Therefore, the object of the present invention is to provide the construction of a cover on a support of the hub unit that has no resistance problem with the fitting with the outer ring member and, in addition to being able to suppress foreign material, such as water dirty, from entering, also easily unloads strange material that has already entered. Means to solve the problem
[0020] The hub unit support of the present invention comprises: an outer ring member, which is a stationary ring; an inner ring member, which is a rotating ring that can rotate with respect to the outer ring member via a plurality of rotating elements; and a cover that covers the inner end sections in the axial direction of the outer ring member and inner ring member. More specifically, the outer ring member has a plurality of rows of outer raceway formed around the inner circumferential surface and, during operation, is a stationary ring that is supported by the suspension and does not rotate; the inner ring member has a plurality of rows of inner raceway formed around the outer circumferential surface, is located on the inner diameter side of the outer ring member, so as to be concentric with the outer ring member, comprises a flange which is formed around the outer end section in the axial direction and supports the wheel, and during operation is a rotation ring that rotates together with the wheel; the plurality of rotating elements are located in each row between the outer groove and the inner groove, so that they can rotate freely; and with this construction it is possible to support the inner ring member so that it can rotate freely. The present invention can be applied to both the drive wheel and the driven wheel unit.
[0021] In the support of the hub unit of a first aspect of the present invention, the cover has a disc section and a cylindrical section that curves outwardly in the axial direction of the outer perimeter end section of the disc section and fits with and is attached to the outer ring member. The cylindrical section comprises a cut and raised section that is formed in part in the circumferential direction of the cylindrical section being cut and raised towards the inside or outside in the radial direction of the cylindrical section, such that this cut and raised section forms a water drainage hole that passes through the inside to the outside of the cover.
[0022] The cut and raised section can be cut and raised by cutting two lines of cutting plane along the circumferential direction of the cylindrical section. In this case, water drain holes can be formed on both sides in the axial direction of the cut and raised section.
[0023] The cut and raised section can also be cut and raised by cutting a cutting plane line along the circumferential direction of the cylindrical section. In this case, one side of the axial direction of the cut and raised section is continuous with the cylindrical section, and the water drain hole is formed on the other side, in the axial direction. In this case, except for both sides in the circumferential direction that are continuous with the cylindrical section, the cut and raised section can have an L-shaped cross section or a linear cross-section in the cross section in the axial direction of the cover (cross section). in a virtual plane that includes the central axis of the roof).
[0024] In the second aspect hub unit of the present invention as well, the cover comprises a disc section and a cylindrical section that is curved out in the axial direction from the perimeter end section of the disc section and fits with and is attached to the outer ring member. In this second aspect it comprises a groove section that has a recess towards the inner or outer part in the radial direction along the axial direction, and a water drainage hole that passes through the inner part to the outer part of the cover is formed in the part between the groove section and the outer ring member.
[0025] The groove section is formed in the cylindrical section in such a way that the groove section is parallel to the axial direction of the cover. Alternatively, the groove section is formed in the cylindrical section in such a way that the groove section is inclined with respect to the axial direction of the cover.
[0026] In the third aspect hub unit support as well, the cover has a disc section, and a cylindrical section that curves out in the axial direction of the perimeter end section of the disc section and fits with and is attached to the outer ring member. In this third aspect, the cylindrical section comprises at least: a large diameter cylindrical section that fits in and is attached to the inner end section in the axial direction of the outer ring member; a side wall section that curves inwardly in the radial direction from the inner end section in the axial direction of the large diameter cylindrical section, with the outer surface in the axial direction coming into contact with the inner end surface in the axial direction the outer ring member; and a small diameter cylindrical section that is continuous with the disc section and curves inwardly in the axial direction from the inner end section in the radial direction of the side wall section.
[0027] A water drainage hole is formed in the part in the circumferential direction of the cylindrical section that connects the small diameter cylindrical section and the side wall section. In addition, the lower end section of the water drain hole located in the middle section in the radial direction of the side wall section and is located lower than the lower end section of the inner circumferential surface of the inner end section in the axial direction of the outer ring member.
[0028] In the hub unit support of a third aspect of the invention, just as a cylindrical section of internal diameter is curved out in the axial direction from the inner end section in the radial direction of the disc section: where the inner circumferential surface of the cylindrical section of internal diameter acts as a sealing surface with which the end at the tip end of the sealing member is made of elastic material, which is a seal that is provided between the cover and the inner ring member or separate member (for example, example, the outer ring for a constant speed joint) that rotates together with the inner ring member, comes into sliding contact or turns well around the circumferential direction.
[0029] In any aspect of the present invention, during operation, the water drain hole can be located in the part of the cover located at the bottom and, more specifically, it can be located within a 35 ° band in the circumferential direction with a dot of intersection where a PLUMB line passing through the central axis of the roof crosses the lower end section of the roof.
[0030] In both the first and second aspects of the present invention, the cylindrical section can be constructed to comprise: a large diameter cylindrical section that fits and is fastened around the outside or inside, in the inner end section in the axial direction the outer ring member; a side wall section that curves inwardly in the radial direction from the inner end section in the axial direction of the large diameter cylindrical section, the outer surface in its axial direction coming into contact with the surface at the inner end in the axial direction of the outer ring member; or a flange section that protrudes outwardly in the radial direction from the inner end section in the axial direction of the large diameter cylindrical section, and curves inwardly in the radial direction, the outer surface in its axial direction coming into contact with the surface at the inner end in the axial direction of the outer ring member; and a small diameter cylindrical section that curves inwardly in the axial direction from the side wall section of the flange section. In this case, in the first aspect of the invention, the cut and raised part can be formed in the small diameter cylindrical section. In the second aspect of the invention, the groove section can be formed in the large diameter cylindrical section.
[0031] In all aspects of the present invention, the disk section includes, for example, a disk-shaped member which is employed in the case of a hub unit support for a follower wheel and which covers the entire radial direction of the inner end in the axial direction and, for example, a circular ring member which is used in the case of a hub unit support for a driving shaft and which closes the space between the outer ring member and the outer ring for a joint constant speed. In the case of the latter, a sealing member made of elastic material can be provided in the inner end section (inner perimeter end section) in the radial direction, and the end at the tip end of the sealing lip of the sealing member it can come in sliding contact all around the outer circumferential surface of the inner end section of the inner ring member, or the outer circumferential surface on the outer end section in the axial direction or the stepped surface of the outer ring for a constant speed joint .
[0032] Furthermore, in case the hub unit support of any aspect of the construction of the invention capable of stopping the rotation of the inner ring member is possible, in which an encoder is provided on the outer circumferential surface of the inner end section in the direction axial of the inner ring member, which is a rotation ring, and a sensor having a detection section facing the encoder is provided in part of the cylindrical section or disk section of the cover. Effect of the Invention
[0033] With the support of the hub unit of the present invention having the construction described above, it is possible to maintain the resistance of the cover fitting with the outer ring member and it is possible to obtain the construction that makes it difficult for foreign matter to enter, such as muddy water, through the water drainage hole that is formed in the roof, as well as allowing the drainage of foreign matter without accumulating inside the internal space.
[0034] In other words, in the case of the first aspect of the hub unit support, a water drainage hole that passes from the inside to the outside of the cover is formed in the cylindrical section of the cover by a cut and raised section that is formed by cutting up and up part of the cylindrical section in the radial direction. Part of the cut and raised section of this type of water drain hole is connected with the cylindrical section, so that the resistance of the cylindrical section is maintained. Therefore, it is possible to maintain the resistance of the cover fitting with the outer ring member. In addition, when the cover is seen from the bottom (outside in the radial direction) of the vehicle, the water drain hole is not exposed (the water drain hole is not opened directly to the outside), so that it is possible to effectively prevent foreign matter, such as water, from entering the roof through the water drainage hole.
[0035] In the case of the hub unit support of the second aspect of the present invention, a concave groove section is formed along the axial direction of the cylindrical section of the cover and a tunnel-shaped water drainage hole is formed between the groove section. and the outer ring member. Consequently, the water drain hole can be formed without having to cut the cylindrical section. Therefore, it is possible to maintain the resistance of the cylindrical section and thus it is also possible to maintain the resistance of the cover fitting with the outer ring member. In addition, when the cover is seen from the bottom (outside in the radial direction) of the vehicle, the drainage hole is not exposed, so it is possible to effectively prevent foreign material, such as water, from entering the cover through the water drain hole. In addition, there is no cutting surface through the cover, so there is no need to perform MASKING when doing the rust test process, such as coating the cover, so that the test can be done easily and thus the covering it can have excellent rust-proof characteristics.
[0036] In the case of the unit support of a third aspect of the present invention, the water drainage hole is formed in the part that connects the small diameter cylindrical section and the side wall section of the cover part which is located at the bottom during the operation, with the bottom section of the part that is open in the side wall section being located in the middle section in the radial direction of the side wall section, so as not to lead to the outer perimeter section. Therefore, when the cover is seen from the bottom of the vehicle, the part of the water drain hole that is open in the side wall section is not exposed. As a result, it becomes difficult to enter foreign matter, such as muddy water that is thrown when the vehicle is traveling, on the side of the side wall in the internal space (detection space) where, for example, the encoder or detection section sensor are located.
[0037] In addition, there is a cylindrical section of the inner diameter of the cover that is located inwards, in the radial direction of the part of the water drain hole that is open in the small diameter cylindrical section of the cover, so that the foreign matter that enters the opening in the small diameter section is thrown back by the outer circumferential surface of this inner diameter cylindrical section, or after the material has adhered to the outer circumference of this inner diameter cylindrical section, the material drips and is drained out. Therefore, it is difficult for foreign matter, such as dirty water, to enter the internal space through the opening in the small cylindrical section. In this third aspect of the present invention, it is thus possible to prevent foreign matter from entering the internal space through the water drainage hole.
[0038] In addition, the lower end section of the water drain hole that is opened in the side wall section is located further down than the lower end section of the inner circumference surface of the inner end section in the axial direction of the ring member so that it is possible to effectively prevent foreign matter from accumulating between the inner circumferential surface, in the inner end section of the outer ring member and the outer surface in the axial direction of the side wall section and, benefiting from the gravity force, it is possible that the foreign matter effectively drains into the outer space.
[0039] In this construction, it is not necessary to form a volume formation section to form a water drainage hole in part of the roof, so, in addition to preventing the reduction of freedom in the selection of material for the roof, it is possible to prevent the increase in processing cost. In addition, the cover can be fitted and attached to the outer ring member with sufficiently strong force. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] Figure 1 is a cross-sectional view of a first embodiment of a hub unit support of the present invention. Figure 2 is an enlarged view of an A in figure 1. Figure 3 is a cross-sectional view of section ll of the cover shown in Figure 2 Figure 4 is an enlarged perspective view of a water drainage hole in the cover shown in Figure 2. Figure 5 is a schematic drawing showing the phase of the water drain hole. Figure 6 is an enlarged cross-sectional view of the main parts of a first variation of a cover of the first embodiment of the present invention. Figure 7 is an enlarged cross-sectional view of the main parts of a second variation in coverage of the first embodiment of the present invention. Figure 8 is an enlarged cross-sectional view of the main parts of a third variation in coverage of the first embodiment of the present invention. Figure 9 is an enlarged cross-sectional view of the main parts of a fourth variation in coverage of the first embodiment of the present invention. Figure 10 is an enlarged cross-sectional view of the main parts of a fifth variation in coverage of the first embodiment of the present invention. Figure 11 is a cross-sectional view illustrating a second embodiment of the hub unit support of the present invention. Figure 12A is a bottom view of the cover shown in Figure 11 and Figure 12B is a left side view of the cover shown in Figure 11. Figure 13 is a bottom view that illustrates a variation in the coverage of this second modality Figure 14 is an enlarged cross-sectional view of the main parts of a third embodiment of the hub unit support of the present invention. Figure 15 is a cross-sectional view of a fourth embodiment of the hub unit support of the present invention. Figure 16 is an enlarged view of B in figure 15. Figure 17 is a cross-sectional view showing a cover removed and the sensor of the fourth modality. Figure 18 is a view as seen from the right in figure 17. Figure 19 is a view of the roof, as seen from the bottom in figure 18. Figure 20 is a perspective view showing the part near the lower end of the cover. Figure 21 is a drawing similar to figure 20 and illustrates a first variation of the fourth embodiment of the present invention. Figure 22 is a view similar to Figure 16 and illustrates a second variation of the fourth embodiment of the present invention. Figure 23 is a cross-sectional view illustrating the condition of carrying out a shearing process on the outer surface of the inner ring. Figure 24 is a cross-sectional view illustrating a first example of conventional construction of a hub unit support. Figure 25 is a cross-sectional view illustrating a second example of conventional construction of a hub unit support. Figure 26 is a cross-sectional view illustrating a hub unit support of a previous invention. Figure 27 is a drawing of a removed cover and a sensor, as seen from the right side in figure 26. Figure 28 is a drawing of the roof, as seen from the bottom in figure 27. Figure 29 is a perspective view illustrating the part near the lower end of the cover. Figure 30 is a drawing that corresponds to figure 29 and illustrates a projected shape of the parts on both sides in the circumferential direction of the water drainage hole of the BULGE section of the roof. Fig. 31 is a cross-sectional view illustrating a second example of the parts on both sides in the circumferential direction of the water drain hole. ILLUSTRATIVE MODALITIES FOR CARRYING OUT THE INVENTION Mode 1
[0041] Figures 1 to 10 illustrate a first embodiment of a hub unit support of the present invention. The hub unit support 33 of this embodiment is a hub unit support for a drive wheel and, as shown in figure 1, comprises an outer ring member 34, a hub 35 as an inner ring member, a plurality of balls 36 as sliding elements, seals 37 a, 37b, a rotational speed detector 38 and a cover 39.
[0042] The outer ring member 34 is a stationary ring and is secured within a retaining hole 41 of a joint 40 which is attached to the vehicle (not shown in the drawings) and connecting a flange on the stationary side 42 which is formed around from the outer circumferential surface of the outer ring member 34 to the joint 40 using screws 43, the outer ring member 34 is connected and secured to the joint 40.
[0043] Hub 35 is a rotation ring and is an integrated combination of a main hub 44 and a separate inner ring 45, and that hub 35 is supported on the inner diameter side of the outer ring member 34 which is concentric with the ring member outer 34. The main hub 44 is a circular column-shaped member having a rotating side flange 46 that is formed around the outer circumferential surface of the outer end in the axial direction (left end in figure 1), such that extend outward in the radial direction from the outer circumferential surface. The hub bolts 47 for connecting to the brake wheel and rotor (not shown in the drawings) are implanted in the flange of the rotating side 46 in such a way that they are evenly spaced around the circumferential direction. The key holes 48 for making a key fit with the key axis of a constant speed joint (not shown in the drawings) are formed on the inner circumferential surface of the main hub 44.
[0044] A small diameter stepped section 49 is formed around the inner end (right side in figure 1) in the axial direction of the main hub 44. An inner ring 45 is fitted into the small diameter stepped section 49, after which the inner ring 45 it is connected and attached to the main hub 44 by stapling the end section in the axial direction of the small diameter stepped section 49. By pressing the inner ring 45 with this clamp, a suitable preload is applied to the balls 36.
[0045] Double rows of outer raceway 50 a, 50b that are parallel to each other in the axial direction are formed around the inner circumferential surface of the outer ring member 34. In addition, the inner grooves 51 a, 51b are formed, respectively, in around the outer circumferential surfaces of the main hub 44 and the inner ring 45 so as to correspond to the outer ribs 50 a, 50b of the outer ring member 34. The balls 36 are located on the ribs that are formed by the inner ribs 51 a, 51b and the external splines 50 a, 50b and are held by a retainer 52, so that they are evenly spaced in the circumferential direction and so that they can rotate freely.
[0046] These spheres 36 come in contact with the external raceway 50 a, 50b and raceway 51 a, 51b at specific angles to each other to form a double rear-to-rear support. As a result, the main hub 44 can rotate about the central axis of the outer ring member 34.
[0047] A seal 37a is provided between the opening section at the outer end in the axial direction of the outer ring member 34 and the outer circumferential surface in the middle section in the axial direction of the main hub 44. On the other hand, a seal 37b is provided between the opening section at the inner end in the axial direction of the outer ring member 34 and the outer circumferential surface of the inner ring 45. These seals 37 a, 37b seal both end sections in the axial direction of the swivel element 53 installation space, where the spheres 36 of the hub unit support 33 are located and, while preventing the fat in the space from leaking, it also prevents various foreign matter, such as rainwater, dust and the like, on the outside, from entering inside installation space of the rotating element 53.
[0048] The seal 37b comprises a metal core 55 having an L-shaped core which is snapped together and secured to the inner circumferential surface 54 in the inner end section in the axial direction of the outer ring member 34, an elastic seal section 56 which is formed using rubber and the like and attached to the core 55, and a projection ring 59 which is snapped around the outer circumferential surface 57 of the inner ring 45 and attached to it and comes in sliding contact with three small lips 58 from the elastic sealing section 56.
[0049] The rotational speed detector 38 comprises an encoder 60 and sensor 61. Encoder 60 is connected to the side surface of the projection ring 59. In addition, sensor 61 is located in such a way that its detection section 62 is close to the detected surface 63 of encoder 60. Encoder 60 is a rubber magnet or plastic magnet in which the ferromagnetic material, such as ferrite or rare earth element is mixed into the rubber, or synthetic resin, and is formed into a circular ring shape and magnetized. The direction of magnetization alternatively changes at equal intervals in the circumferential direction.
[0050] The cover 39 has a circular disc section 65 that is formed by pressing on the rust-proof metal plate, such as stainless steel metal plate or galvanized metal plate and has a deep hole 64 through which a SPLINE shaft constant speed joint (not shown in the drawings) passes and a small diameter cylindrical section 66 and a large diameter cylindrical section 67 that are formed by curving the outer perimeter end section of the circular disk section 65 outwardly into the axial direction in two stages. The large diameter cylindrical section 67 fits around the outer circumferential surface 68 of the inner end section in the axial direction of the outer ring member 34 and the stepped section 69 connecting the small diameter cylindrical section 66 and the cross section large diameter cylindrical 67 is brought into contact with the surface 70 at the inner end in the axial direction of the outer ring member 34.
[0051] As shown in figures 2 to 4, a cut and raised section 71 is formed in the small diameter cylindrical section 66. This cut and raised section 71 is formed by cutting two flat cut lines that are parallel along the circumferential direction of the section small diameter cylindrical 66 and raised towards the inside in the radial direction of the small diameter cylindrical section 66. The cut and raised section 71 is also cut and raised in a strip shape of the small diameter cylindrical section 66 in order to have a trapezoidal shape in cross section where both end sections in the circumferential direction of the cut and raised sections 71 are continuous with the small diameter cylindrical section 66 in both side sections in the axial direction of the cut and raised section 71 are separated from the cylindrical section small diameter 66. As a result, the water drainage hole 73 that passes through the inside to the outside of cover 39 is formed on both sides in the axial direction of the raised and cut section 71.
[0052] Sensor 61 is inserted through a sensor hole that is formed in the cylindrical section 66 of the cover 39, and the detection section 62 of sensor 61 is located so that it faces the detected surface 63 of encoder 60. Like encoder 60 rotates together with the main hub 44 and the inner ring 45, the performance of the sensor 61 changes to a frequency that is proportional to the rotational speed, and the rotational speed of the wheel (not shown in the drawings) is detected.
[0053] As shown in figure 5, preferably a water drainage hole 73 is located in position D in the lower end section of cover 39 and position A1 within a range of 10 ° to 35 ° in the circumferential direction of rotation when the vehicle is traveling to the front from the point of intersection where a vertical line VL passes through the central axis of the cover 39. Here, position D is a position where water can drain easily due to gravity when the vehicle stops and position A1 where the water that is released by the rotation of the encoder 60 can drain.
[0054] Normally, a vehicle travels forward, so forming the water drain holes 73 in positions D and A1, as described above, is appropriate. However, when, for manufacturing convenience, cover 39 is made for use by either the right wheel or the left wheel and it is not possible to specify the direction or rotation, a third water drain hole 73 could also be located in a position A2 which is axially symmetrical to position A1 with respect to the vertical line VL. The number of water drain holes 73 is arbitrary and it is also possible to have four or more.
[0055] In addition, in the case of a support that is used with a normal passenger vehicle, or freight vehicle, preferably the water drain holes are located in a total of two positions, the D position and in a 6 ° to 12 position ° in the direction of rotation from the vertical line VL when the vehicle is traveling forward. Here, the reason the angle is 6 ° to 12 ° is that, on a good, flat, paved road, the acceleration / deceleration of a car that is being driven safely, within the legal speed limit, is usually 0.1G to 0.2G, so that the tangent of acceleration and gravity is within the range of 0.1 to 0.2.
[0056] In the case of a vehicle that usually travels on poorly maintained roads, when taking into account instantaneous acceleration / deceleration, or the orientation of the vehicle, a position at a greater angle, for example, 20 ° to 30 ° is preferable and, in the case of a vehicle that is used for construction, or on a farm, or a 4-wheel drive vehicle, the vehicle only travels forward or backward at a low speed over uneven terrain, so preferably the water drain holes are used in a total of three locations, the D position above, and a location in a 10 ° to 25 ° position on both sides in the cir-circumferential direction from the vertical VL line. In addition, when the water drain hole is located at an angle of 6 to 12 °, it is also possible to form an elongated water drain hole instead of a plurality of holes.
[0057] In addition, as shown in figure 3, the length (L) in the circumferential direction of each water drain hole 73 is preferably 4 to 10 times the thickness of the raw material plate (t). This is because, when the length (L) in the circumferential direction is less than 4 times the thickness of the plate (t), the cutting and lifting process is difficult and, when the length (L) is greater than 10 times the thickness of the plate. plate (t), the stiffness of the small diameter cylindrical section 66 decreases due to the elevation and cut section 71 and, in addition to the fact that it is difficult to maintain a suitable gap width, there is a possibility that the strength of the cylindrical section of small diameter be affected.
[0058] In addition, when the water drain holes are formed in a plurality of locations, from the strength aspect, preferably the total length of the water drain holes 73 is 5% to 10% the length of the outer perimeter of the section small diameter cylindrical.
[0059] As shown in figure 3, the height of a water drain hole 73 is arbitrary, however, preferably 0.5 mm or more and is equal to or less than the thickness of the plate. This is because, when the height is less than 0.5 mm, there is a possibility that the water will not be sufficiently drained due to an interfacial tension of water and, when the height is greater than the thickness of the plate, it is not only difficult to process , but the area of the water drain hole 73 is enlarged and the possibility of foreign matter entering through the hole increases. In figure 3, to better understand the construction of the water drain hole 73, the height of the water drain hole 73 is represented as being greater than the thickness of the plate.
[0060] In addition, as shown in figure 2, the width in the axial direction of the cut and raised section 71 is preferably at least 2 times the thickness of the plate. For the same reason described above, preferably the space between the surface at the inner end in the axial direction of the raised and cut section 71 and the inner surface of the disc section 65 is at least 2 times the thickness of the plate. When the space is very small, there is a possibility that the water will not drain sufficiently due to the interfacial tension of the water. In figure 2, to more easily understand the construction of the elevated and cut section 71, the space is represented as being less than 2 times the thickness of the plate.
[0061] The cover material 39 is preferably a non-magnetic material, such as austenitic stainless steel. In the case of austenitic stainless steel, the raised and cut section can be formed by means of pressure and the material does not retain abrasive material that is magnetized by receiving mechanical force and does not attract and retain iron sand or road dust with a magnetic force. In addition, the shape of the raised and cut section 71 is arbitrary and is not limited to a trapezoidal shape in cross section, as illustrated in figure 3: for example, it could also have a triangular shape or in cross section.
[0062] As explained above, with the support of the cube unit 33 of this modality, it is possible for matter, such as water, to enter inside the cover 39 to effectively drain from the water drain holes 73 that are formed in the section of the part bottom of cover 39. In addition, in the case of the cube unit 33 support of this embodiment, the parts (both ends in the circumferential direction) of the cut and raised sections 71 to form the water drain holes 73 that pass through the part internal to the outside of the cover are connected to the small diameter cylindrical section 66, in order to maintain the resistance of the small diameter cylindrical section 66. Therefore, with the cover 39 having this type of construction, it is possible to maintain the resistance of the fit with the outer ring member 34.
[0063] In addition, the shape of the water drain hole 73 differs from the shape of a conventional water drain hole and, when viewed from the bottom (outside in the radial direction) of the cover 39, the front surface of the opening is covered by the part of the raised and cut section 71, so that the opening part of the water drain hole is not exposed (the water drain hole 73 is not directly opened to the outside), so that it is possible to prevent effectively, that foreign matter, such as water, enter the roof 39. Mode 1, Variation 1
[0064] Figure 6 illustrates a first variation of the first embodiment of the present invention. A cover 39A, as shown in figure 6, can also be used as the cover to cover the inner end sections in the axial direction of the outer ring member 34 and the hub 35. This cover 39 A does not have a small diameter cylindrical section , but only a large diameter cylindrical section 67 and an elevated cut section 71 that is formed in the large diameter cylindrical section 67 is formed so that it protrudes towards the inside in the radial direction. The cover 39 A is mounted so that the end section (outside the end section in the axial direction) of the large diameter section 67 fits around the outer circumferential surface 68 of the outer ring member 34 and the surfaces at the outer end in the axial direction (surface at the left end) of the raised and cut section 71 it contacts the surface 70 at the inner end of the outer ring member 34.
[0065] With this variation, of the two water drainage holes 73 that are formed on both sides in the axial direction of the raised and cut section 71, one of the water drainage holes 73 (left side in figure 6) is covered by the ring member external 34, then it is possible to effectively prevent foreign matter, such as water, from entering the coverage 39A. Mode 1, Variation 2
[0066] Figure 7 illustrates a second variation of the first embodiment of the present invention. It is also possible to use a cover 39B, as shown in figure 7, as the cover covering the end sections in the axial direction of the outer ring member 34 and the hub 35. In this cover 39B an elevated section and cut 71 is formed so that it protrudes towards the outside in the radial direction and the drainage holes 73 are formed in the parts on both sides in the axial direction of the raised and cut section 71. Mode 1, Variation 3
[0067] Figure 8 illustrates a third variation of the first embodiment of the present invention. It is also possible to use a cover 39C, as illustrated in figure 8, as the cover covering the inner end sections in the axial direction of the outer ring member 34 and the hub 35. This cover 39C is such that it starts from the small cylindrical section diameter 66 is cut with a flat line 72C along the circumferential direction at a location close to the disc section 65 and with that part rising towards the inside in the radial direction, a cut and elevated section 71C having a shaped cross section of L is formed in the small diameter cylindrical section 66. Therefore, the outer part in the axial direction (left side in figure 8) of the cut and raised section 71C is continuous with the small diameter cylindrical section 66 and the inner part in the axial direction (right side in figure 8) is detached from the small diameter cylindrical section 66 and a water drainage hole 73 is formed in the detached part.
[0068] With this variation, the water drain hole 73 is only formed in the internal part in the axial direction of the cut and elevated section 71C (right side in figure 8), so that, when compared with the case where the holes are formed in both sides in the axial direction, it is also possible to prevent foreign matter, such as water, from entering the cover 39C. Mode 1, Variation 4
[0069] Figure 9 illustrates a fourth variation of this first embodiment of the present invention. It is also possible to use a cover 39D, as illustrated in figure 9, as the cover covering the inner end sections in the axial direction of the outer ring member 34 and the hub 35. This cover 39D is such that it starts from the cylindrical section of small diameter 66 is cut with a line of cutting plane 72D along the direction of the circumference at a location close to the disc section 65 and raising that part towards the inner part in the radial direction, a cut and elevated section 71D having a section in linear cross section is formed in the small diameter cylindrical section 66 in such a way that it extends diagonally upwards towards the inner part in the axial direction from the small diameter cylindrical section 66. Therefore, the outer part in the direction axial (left side in figure 9) of the raised and cut section 71D is continuous with the small diameter cylindrical section 66 in the axial direction (right side in figure 9) is detached from the small diameter cylindrical section 66 and a water drainage hole 73 is formed in the detached part.
[0070] With this variation, the water drain hole 73 is only formed on the inside in the axial direction of the raised and cut section 71D (right side in figure 9), so when compared to the case where holes are formed on both sides in the axial direction, it is possible to prevent foreign matter, such as water, from entering the 39D cover. Mode 1, Variation 5
[0071] Figure 10 illustrates a fifth variation of the first embodiment of the present invention. It is also possible to use a cover 39E, as illustrated in figure 10, as the cover covering the sections of the inner part in the axial direction of the outer ring member 34 and the hub 35. The cover 39E is such that part of the cylindrical section 66 is cut with a line of cutting plane 72E along the circumferential direction in a separate location from the disk section 65 (opposite position in the axial direction of the disk section 65) and raising that part in the external direction in the radial direction, a section raised and cut 71E having a cross section is formed in the small diameter cylindrical section 66, such that it extends diagonally downwards towards the outside in the axial direction from the small diameter cylindrical section 66. Therefore, the inner part in the axial direction (right side in figure 10) of the cut and elevated section 71E is continuous with the small diameter cylindrical section 66 and the outside in the axial direction (left side in figure 10) is detached from the cylindrical section small diameter 66 and a water drainage hole 73 is formed in the detached part.
[0072] With this variation, the water drainage hole 73 is opened towards the outside in the axial direction and this opening section is surrounded by the cut and raised section 71E, the large diameter cylindrical section 67 and the stepped section 69 in such a way that it is not exposed to the external part, so that it is possible to prevent, still, foreign matter, such as water, to enter inside the cover 39E. Mode 2
[0073] In the following, a second embodiment of a hub unit support of the present invention will be explained with reference to figures 11 to 13. The same reference numbers are given to the same or equivalent parts in the first embodiment. The explanations of these parts will be omitted or simplified.
[0074] As shown in figure 11, the hub unit holder 33A of this embodiment in a hub unit holder for a follower wheel and comprises an outer ring member 34A, a hub 35A as an inner ring member, a plurality of spheres 36 A as ball elements, seals 37A, 37B and a cover 75.
[0075] The cover 75 has a disc section 76 and a cylindrical section 77 that is formed by curving outwardly in the axial direction from the outer perimeter end of the disc section 76. A flange section 78 that protrudes outwardly in the direction radial is formed around in the radial direction is formed around the outer circumferential surface in the middle section in the axial direction of the cylindrical section 77 and with the outer surface of this flange section 78 led to contact the surface 70A at the inner end of the ring member outer shell 34A, cover 75 is fitted within the inner circumferential surface 79 of outer ring member 34A.
[0076] In addition, as shown in figures 11, 12 A and 12B, a groove section 80 having a semicircular cross section and a recess in the radial direction is formed on the end side (outside in the axial direction and on the left in the figure 11) of the cylindrical section 77 of the roof 75. This groove section 80 is parallel to the axis line and is formed in a position in the axial direction that goes a little beyond the flange section 78. Therefore, as shown in figure 12 A, the flange section 78 is curved inwardly in the axial direction (towards the side of the disk section 76) in the groove section part 80.
[0077] By fitting the cover 75 within the inner circumferential surface 79 of the outer ring member 34 A, a tunnel-shaped water drainage hole 81, having an L-shaped cross section (cross section with respect to a virtual plate that includes the central axis of the cover 75) is formed between the groove section 80 and the inner circumferential surface 79 and the surface 70 A at the inner end of the outer ring member 34 A. In the case of this embodiment, the flange section 78 is formed in the cylindrical section 77 of the cover 75, so that when the groove section 80 that will become the interlocking section is formed in the cylindrical section 77, it is possible to prevent the stiffness 77 from decreasing. Therefore, it is possible to firmly fit the cover 75 inside the outer ring member 34 A.
[0078] In addition, in the case of this modality, the width in the cir-circumferential direction of the water drain hole 81 (groove section 80) is preferably 4 to 10 times the thickness of the raw material of the plate. This is because when the width in the circumferential direction is less than 4 times the thickness of the plate, the processing of the groove section 80 becomes difficult and there is the possibility that, due to the interfacial tension of the water, sufficient drainage will not be obtained . When the width exceeds 10 times the thickness, there is a possibility that the strength of the cylindrical section is not sufficient.
[0079] The cross-sectional shape of the groove section 80 shown in the figure is semicircular. However, the shape of the cylindrical section is arbitrary. However, considering to obtain both good drainage and ease of processing, it is preferable that the height of the part through which the water passes is 0.5 mm or greater and equal to or less than the thickness of the plate. In addition, the location of the groove section is the same, as in the case of the first modality. In figures 12 A and 12B, to better understand the construction of the groove section 80, the height of the part where water passes is represented as being greater than the thickness of the plate.
[0080] In the case of the cover 75 of this modality, it is not necessary to cut the cylindrical section 77 to form the water drainage hole 81, so the possibility of affecting the resistance of the cylindrical section 77 is small. Therefore, after cover 75 has been plastically worked (pressed) in a circular ring shape with a bottom and all surfaces have been coated, it is possible to form and process groove section 80. It is also possible to use, as a cover, material that rusts easily. In addition, the shape of the cover 75 is comparatively simple and there is no problem with the coating adhering, as in the case of a complex shape, so, after the groove 80 has been formed, the coating can be easily made.
[0081] In addition, in the case of a support for the 33 A hub unit that does not have an encoder as in this modality, the cover 75 can be formed using more economical material, such as SPCC steel plate and covering the cover 75 is possible maintain the drainage performance of the water and obtain a covering 75 that is rustproof. Preferably, an electroplating coating, or cooking coating, is used as the coating. Also, instead of coating, it is possible to do a galvanizing process, such as ELECTROLESS nickel galvanizing, chrome galvanizing, galvanizing, tin galvanizing or the like, or a combination thereof.
[0082] As explained above, in the case of the cube unit 33 A support of this modality, a tunnel-shaped water drainage hole 81 is formed between a groove section 80 that is formed in the cylindrical section 77 of the roof 75, in such a way which has a recess in the inner part in the radial direction and in the outer ring member 34 A. Therefore, the water drain hole 81 can be formed in the cylindrical section 77 without cutting. As a result, it is possible to maintain the strength of the cylindrical section 77 and maintain a firm fit of the cover 75 with the outer ring member 34 A.
[0083] When the cover 75 is seen from the bottom of the vehicle (bottom in the radial direction), the inside of the cover 75 is not exposed through the water drain hole 81 (the inside is covered by the section part groove 80 and the outer ring member 34, then it is possible to effectively prevent foreign matter, such as water, from entering the cover 75.
[0084] In addition, there are no cuts in the roof 75, so that waterproofing the roof 75 against rust is something that can be done easily and, thus, it is possible to improve the rust prevention capacity of the roof 75.
[0085] The other construction and function are the same as in the modality described above. Mode 2, Variation
[0086] Figure 13 illustrates a variation of the second modality. It is also possible to use a 75 A cover, as shown in figure 13, as the cover covering the inner end sections in the axial direction of the outer ring member 34 A and the hub 35 A (see figure 11). In this cover 75 A, a groove section 80 A is formed in the cylindrical section 77, such that it is inclined at a specific angle with respect to the axis of the cover 75 A.
[0087] When the groove section 80 A is inclined with respect to the roof axis line 75 A in this way, by tilting the groove section 80 A in the same direction as the direction of rotation of the hub unit bearing 33 A, it is possible drain water using the projection ring 59 of the seal 37B and the rotation of the encoder 60 which is attached to the projection ring 59 and, thus, it is possible to improve the water drainage capacity. Mode 3
[0088] In the following, a third embodiment of the hub unit support of the present invention will be explained with reference to figure 14. The same reference numbers will be used for parts that are the same or equivalent to those in the first embodiment. An explanation of these parts will be omitted or simplified.
[0089] In the support of the hub unit 33B of this modality, a cover 82 is used, as shown in figure 14. This cover 82 has a large diameter cylindrical section, 83, which fits around the circumferential surface 68 of the outer ring member 34 , a side wall section 84 that extends from the inner end section in the axial direction of the large diameter cylindrical section 83 and contacts the surface at the inner end of the outer ring member 34, a small diameter cylindrical section 85 that extends towards the inner part in the axial direction from the inner end section of the side wall section 84, a disc section 86 that extends towards the inner part in the radial direction of the inner end section in the radial direction of the section small diameter cylindrical 85, and a cylindrical section with an inner diameter 87 that extends towards the outside in the axial direction from the inner end section of the disc 86. In this cover 82 there is a raised and cut section 71 that is formed in the small diameter cylindrical section 85, so that it is raised towards the inside in the radial direction.
[0090] In this embodiment, a seal 89 is provided between the small-diameter outer circumferential surface 88 that is formed around the inner end section in the axial direction of the inner ring 45 and the inner circumferential surface of the inner diameter cylindrical section 87 of the cover 82. This seal 89 comprises a metal core 90 having an L-shaped cross section which is snapped around the small diameter outer circumferential surface 88 of the inner ring 445 and an elastic seal section 92 which is connected to a core of metal 90 and has a sealing lip 91 which comes in sliding contact with the inner circumferential surface of the cylindrical section of internal diameter 87. This sealing 89 prevents various types of foreign material from entering the cover 82. The sealing lips 91 do not limit to a type of contact that comes in contact with the cylindrical section of internal diameter 87, as described above, and a type of non-contact which forms a small space (labyrinth seal) between the sealing lip and the inner diameter cylindrical section 87 could be used.
[0091] In the case of this embodiment having the construction described above, the seal 89 that is provided between the cover 82 and the inner ring 45 can effectively prevent foreign material, such as moisture, fine particles and the like from entering the cover 82 through the space between cover 82 and inner ring 45.
[0092] The other construction and function are the same as in the first modality described above. Mode 4
[0093] In the following, a fourth embodiment of a hub unit holder of the present invention will be explained with reference to figures 15 to 20. The characteristics of the hub unit holder 33C of the present embodiment are the construction of the cover 93 that covers the detection space 22 in the detection section between the encoder 60 and the sensor 61 of the internal part in the axial direction, and the construction of the water drainage hole 94 that is formed in the cover 93. The same reference numbers are given for the same or equivalent parts those of the first modality. The explanations of these parts are omitted or simplified.
[0094] The cover 93 which is used in this embodiment is made of metal such as non-magnetic stainless steel and comprises a large diameter cylindrical section 95, a side wall section 96, a small diameter section 97, a disc section 98 and a cylindrical section of inner diameter 99. The cylindrical section of large diameter 95 is engaged in the inner end section in the axial direction of the outer ring member 34. The sidewall section 96 is formed by bending at a right angle towards the part inner in the radial direction from the inner end section in the axial direction of the large diameter cylindrical section 95 and, except for the part in the circumferential direction (the part located at the top end when in operation), the outer surface in the axial direction of the side wall 96 contacts the surface 70 at the inner end in the axial direction of the outer ring member 34. The small diameter cylindrical section 97 is formed by bending in an angle straight towards the inner part in the axial direction from the inner end section of the side wall section 96. The disc section 98 is formed by bending at a right angle towards the inner part in the radial direction of the end section inner in the axial direction of the small diameter cylindrical section 97. In addition, the inner diameter cylindrical section 99 is formed by curving at a right angle towards the outside in the axial direction from the inner end section in the direction the radial section of the disc section 98 and is located in the inner part in the radial direction of the small diameter cylindrical section 97. In addition, the end of the tip end (end in the outer end in the axial direction) of this inner diameter cylindrical section 99 is located more towards the outer direction in the axial direction than towards the inner surface in the axial direction of the side wall section 96, and that end at the end of the tip is very close to the section edge on the inner perimeter of the inner surface in the axial direction of the encoder 60, forming a labyrinth seal on that part. The work of securing the cover 93 having this type of construction in the inner end section in the axial direction of the outer ring member 34 is done using a JIG, the pressure of which is made of synthetic resin, for example, to press the inner surface in the axial direction of the side wall section 96 of the cover 93. In the case of this modality, a rust-proof process, such as coating with cation electrodeposition is done on the cover 93.
[0095] In addition, the cover material 93 can be selected appropriately within a range that fulfills the original purpose of covering the inner end section in the axial direction of the outer ring member 34 and the hub 35. However, under the aspect of prevent leakage of the magnetic flux from reaching and entering the inner surface in the axial direction of encoder 60, which is the detected surface, preferably a non-magnetic material, such as non-magnetic stainless steel, aluminum alloy, synthetic resin and the like is used.
[0096] In addition, in this modality, there is a volume section 32 (see figures 26 to 31) formed in the cover 93, and there is a water drainage hole 94 formed in the part located at the lower end of the cover 93 in the operating condition between the section small diameter cylindrical 97 and side wall section 96 and has a size capable of draining foreign matter. Particularly in the case of this modality, of this water drainage hole 94, the lower end section (lower end) 101 of the part that is open in the side wall section 96 is located in the middle section of the radial direction of the side wall section 96 and it is such that it does not reach the side wall section of the end of the outer perimeter 96 (it does not pass through in the radial direction). With this type of construction, a cover section 102 that is formed from the remaining section of the side wall section 96 is provided still on the outside (bottom side during operation) in the radial direction of that side wall section 96 than the part of opening of the water drain hole 94. In addition, in this embodiment of the water drain hole 94, the lower end section 101 that is open in the side wall section 96 is located lower than the lower end section 103 of the inner circumferential surface at the inner end in the axial direction of the outer ring member 34. In addition, in this embodiment, the lower end section 101 of the water drain hole 94 is angled in an outward direction (for down during operation) in the radial direction away from the surface 70 at the inner end in the axial direction of the outer ring member 34. The shape and size of the water drain hole 94 is not limit to that illustrated in the drawings and can be changed appropriately within the range that allows the drainage of foreign matter that enters inside. In addition, the hub unit support of the present invention can be changed according to the type of wheel used, with the application or according to the region in the same way as in the first embodiment described above.
[0097] In addition, in the case of this modality, a staggered section with small diameter 104 is formed in the inner end section in the axial direction of the inner ring 45 A that forms hub 35 with main hub 44. As a sealing means, a sealing ring 105 is fitted in the stepped section with small diameter, in order to contact the stepped surface 106 that exists in the external end section in the axial direction of this stepped section of small diameter 104. The sealing ring 105 comprises an L-shaped metal core and a sealing member 108 made of elastic material that is connected and attached to the outer surface of the metal core 107. Sealing member 108 comprises or a plurality of sealing lips 109 (there is one in the example in the figure) and the end in end of the lip of the sealing lip 109 comes in sliding contact around the entire sealing surface 110 which is the inner circumferential surface of the cylindrical section 99 of the inner diameter of the cover 93. The work of fitting and securing the seal ring 105 having this type of construction around the outside of the small diameter stepped section 104 of the inner ring 45 A can be done after attaching the cover 93 to the inner end section in the axial direction of the outer ring member 34. The drawing illustrates the shape of the end at the end of the sealing lip 109 in the free condition. In this embodiment, the seal ring type 105 is used to close the detection space 22 where the encoder 60 and the sensor detection section 61 are located in the external space.
[0098] In addition, a combined sealing ring 112 is provided between the flange section 111, which exists in the part between the inner raceway 51b on the inner side of the axial direction that is formed between the inner ring 45 A and the stepped section of small diameter 104 and the inner circumferential surface of the inner end section in the axial direction of the outer ring member 34. A permanent magnet type encoder 60 is connected and attached to the inner surface in the axial direction of a projection ring 113 of that combined seal ring 112, with the characteristics of the inner surface in the axial direction of the encoder 60 which is a detected surface, alternatively changing at uniform intervals in the circumferential direction.
[0099] In that embodiment, an active sensor 61, having a magnetic detection element such as a Hall element or magnetic resistance element in the detection section is supported by and attached to the cover 93 having the construction described above. In this embodiment, the sensor 61 is fitted within a support section 114 which is formed causing the part of the side wall section 96 of the side wall section 93 which is located at the upper end during the volume forming operation inwards in the axial direction. The detection section of this sensor 61 faces the detected surface of the encoder 60 which is on the inner surface in the axial direction. The method for attaching sensor 61 to cover 93 is not particularly specific. However, several methods for fastening can be employed, such as a molded formation, pressure fitting, fixation by means of adhesion using an adhesive, fixing screw or the like. In the example illustrated in the drawings, the base end section of a device 115 is connected to sensor 61 and that device is pulled in the direction of the diameter so that electrical power can be supplied to sensor 61 and so that the detection signals from the sensor 61 can be recovered. In addition, a connector 116 for connecting another device or control device is provided in the tip end section of that device 115. However, it is also possible to omit this type of device 115 and attach connector 116 directly to sensor 61, or it is also it is possible to pull this device 115 in, in the axial direction.
[0100] With the support of the cube unit 33C of this modality which is built as described above, it is possible to prevent foreign matter, such as muddy water, from entering the detection space 22, where the encoder 60 and the sensor detection section 61 are located through the water drainage hole 94 that is formed in the cover 93, it is also possible to effectively drain foreign matter to the outside.
[0101] In other words, in the case of this modality, a water drainage hole 94 is formed in the part located at the bottom of the cover 93 during operation is between the small diameter cylindrical section 97 and the side wall section 96, and the section lower end (lower end) 101 of the part that is open in the side wall section 96 is located in the middle section in the radial direction of the side wall section 96. Therefore, there is a cover section 102 that is formed by the remaining part of the side wall section 96 that is further away, on the outside (bottom side during operation), in the radial direction than the opening section of the water drain hole 94. As is clearly illustrated in figure 19, even when you see the cover 93 from the bottom of the vehicle, the part of the water drain hole 94 that is open in the side wall section 96 is covered by the cover section 102 and is not exposed. In addition, when the cover 93 is viewed from the inside in the axial direction, the part that is opened in the side wall section 96 is covered by the surface 70 at the inner end in the axial direction of the outer ring member 34. Therefore, in this embodiment, it becomes difficult for foreign matter, such as muddy water that is splashed during operation of the vehicle to enter the detection space 22 through the part that is opened in the side wall section 96.
[0102] In addition, the inside diameter cylindrical section 99 of the cover 93 is located in the radial direction inside the part of the water drain hole 94 that is opened in the small diameter cylindrical section 97 of the cover 93. Therefore, the foreign matter that it enters the open part in the small diameter cylindrical section 97 is played by the outer circumferential surface of the small diameter cylindrical section 99, or falls after adhering to the outer circumferential surface of the inner diameter cylindrical section 99 and is discharged into the outer space. In particular, the end at the upper end of the cylindrical section of internal diameter 99 is located more outwardly, in the axial direction, than the inner surface in the axial direction of the side wall section 96, so that it is possible to prevent sufficiently that matter oddly enter the part of the water drain hole 94 that is opened in the small diameter cylindrical section 97.
[0103] Thus, in this embodiment, it is possible to prevent foreign matter from entering the cover 93 through the water drain hole 94. Furthermore, in this embodiment, the lower end section 101 of the part of the water drain hole 94 that is opened in the side wall section 96 is located lower than the lower end section 103 of the inner circumferential surface of the inner end section in the axial direction of the outer ring member 34. Therefore, it is possible to effectively prevent foreign matter from accumulating between the inner circumferential surface of the inner end in the axial direction of the outer ring member 34 and the outer surface in the axial direction of the side wall section 96, and taking advantage of the force of gravity, it is effectively possible to drain foreign matter into the external part. In addition, the lower end section 101 is tilted in a downward direction, in the radial direction that is distant from the inner surface 70 in the axial direction of the outer ring member 34, so that it is possible to further improve the ability to if foreign matter is drained into outer space. In this modality, it is not necessary to form a volume section 32 to form a water drainage hole in the cover 93, as in the construction of the previous invention described above (see figures 26 to 31), so that, in addition to preventing the reduction of freedom in the selection of material for coverage, it is possible to prevent the increase in processing cost. The cover 93 can be fitted and attached to the outer ring member with sufficiently strong force. In this embodiment, a labyrinth space is formed between the end, at the end of the end of the cylindrical section of inner diameter 99 and the end of the inner perimeter of the inner surface in the axial direction of the encoder 60, so that it is possible to prevent foreign matter from entering. through the water drainage hole 94 and reach the sealing ring 105. Therefore, it is possible to prevent previous wear of the end on the upper end of the sealing lip 109 of the sealing ring 105. By making the cover with non-magnetic material, such as non-magnetic stainless steel and causing the tip end of the end of the cylindrical section of inner diameter 99 to be very close to the inner surface in the axial direction of encoder 90, it is possible to maintain the amount of magnetic flux from encoder 60 reaching the magnetic detection element of sensor 61 without the magnetic flux leaking into the cover 93. By doing this, it is possible to maintain, sufficiently Therefore, the reliability of rotational speed measurement by sensor 61.
[0104] The other construction and function are the same as in the first modality described above. Mode 4, Variation 1
[0105] Figure 21 illustrates a first variation of the fourth embodiment of the present invention. In this variation, triangular-shaped sidewall sections 117 are formed on both sides in the circumferential direction of the water drainage hole 94 A that is formed in the cover part 93 A between the small diameter cylindrical section 97 A and the side wall 96 A. These side wall sections 117 can be formed by pressing while the water drain hole 94 a is formed. In this variation, with this type of construction it is possible to adjust the air flow and, thus, it is possible to adjust the air flow and, thus, it is possible to adjust the air flow and, thus, it is possible to improve the effect of preventing drops of water enter the detection space 22 (figures 1 and 2). Mode 4, Variation 2
[0106] Figure 22 and Figure 23 illustrate a second variation of the fourth embodiment of the present invention. In this embodiment, the seal ring 105 A when the seal is fitted in the middle section in the axial direction of the small diameter stepped section 104 A without coming into contact with the stepped surface 106 that is formed in the outer end section in the axial direction of this small stepped section of small diameter 104 A. In the case of this modality having this type of construction, the irregularity of the profile of the part near the outer end in the axial direction of the stepped surface 106 and the stepped section of small diameter 104 A does not adversely affect the accuracy of installation of the 105 A seal ring, so that it is not necessary to carry out a finishing process (shear process) of these surfaces. On the other hand, when performing a polishing process using a GRINDSTONE molded on the outer surface of the inner ring 45B, interference between the molded GRINDSTONE and the inner ring 45B becomes a problem.
[0107] In particular, when shearing the flange section 111 as well as the middle section and the inner end section of the small diameter scaling section 104 A of the outer circumferential surface of the inner ring 45B, this interference problem occurs easily. Therefore, in this embodiment, a concave groove of RELIEF 118 is formed around the entire outer end in the axial direction of the staggered section of small diameter 104 A in the part that is separated out in the axial direction of the part where the seal ring 105 A it fits, and this relief groove 118 sufficiently maintains the amount of recess inward in the radial direction. As a result, in this embodiment, a molded GRINDSTONE 119, comprising a diamond wheel as shown in figure 23, is used to perform a simultaneous shear of the internal raceway 51b, the rim section 111 and the middle section and the section of inner end in the axial direction of the 104 A small diameter stepped section of the outer circumferential surface of the inner ring 45B at the same time without interference between the GRINDSTONE 119 and the inner ring 45B.
[0108] In addition, in this embodiment, a sealing member 108 A comprises two sealing lips 109 A and 109 B are connected and attached to the outer circumferential surface of the metal core 107 of the sealing ring 105 A. Both of these sealing lips 109 A, 109 B extend in the distant direction from each other in the axial direction, and the ends at the tip ends come in sliding contact around the entire surface 110 A which is the inner circumferential surface of the 99A inner diameter cylindrical section of the cover 93B. In addition, the fat is kept between both of these sealing lips 109 A, 109B.
[0109] Also in this modality, the 93B cover is made of metal like non-magnetic stainless steel. The 99A inner diameter cylindrical section of the cover 93B is a partially cylindrical cone shape that is tilted in a direction such that the outer diameter dimension becomes larger inward in the axial direction. In addition, the end at the tip end (outer end in the axial direction) of the cylindrical section of inner diameter 99 A is located more outwardly in the axial direction than the surface at the inner end in the axial direction of the sidewall section 96 of the cover 93B, and that end, at the tip end, is turned very close to the end section of the outer perimeter of the stepped surface of the stepped surface 106 which is molded around the inner ring 45B, forming a labyrinth seal there. part.
[0110] In the case of this embodiment having a construction as described above, two sealing lips 109 A, 109B are provided in the sealing ring 105, so that, when compared to the case of providing only one sealing lip, it is still possible to improve and the effect of preventing foreign matter, such as muddy water, from entering the interior. Also, there is fat kept between both of these lips 109 A, 109B, so together with the fact that it is able to prevent an increase in the rotation torque of the hub 35 caused by these two sealing lips 109 A, 109B, it is possible to prevent the wear of the ends at the tip ends of the sealing lips 109 A, 109B.
[0111] In addition, the end at the tip end of the 99A inner diameter cylindrical section of the cover 93B is located more outwardly in the axial direction than the inner surface in the axial direction of the sidewall section 96, so it is possible to obtain sufficiently , the effect of preventing foreign matter from entering the part that is opened in the small diameter cylindrical section 97 of the water drain hole 94 that is formed in the lower end section of the cover 93B. In addition, the small diameter cylindrical section 99 A is a partial tapered cylinder that is tilted in such a way that the dimension of the outside diameter becomes larger by going in the axial direction, so that it is possible to drain foreign matter that entered the space detection 22 through the water drain hole 94 to the outer space through the water drain hole 94. In other words, after the foreign matter that entered through the water drain hole 94 has adhered to the outer circumferential surface of the section cylindrical diameter 99 A, this foreign matter is carried along the outer circumferential surface to the outer surface in the axial direction of the disk section 98 and, by the force of gravity acting there, reaches the circumferential surface of the small diameter cylindrical section 97. Therefore, it is possible to effectively drain the foreign matter that entered the detection space 22 through the part that is opened in the cylindrical section d and small diameter 97 of the water drain hole 94. In the case of this variation as well, the lower end section 101 of the water drain hole 94 is an inclined surface, which slopes inward, away from the surface 70 at the inner end in axial direction of the outer ring member 34, so that it is possible to further improve the ability to drain foreign matter into the outer space.
[0112] In addition, in this variation, making the 99 A inner diameter cylindrical section to be a partial tapered cylinder, and because the sealing surface 110 A, which is the inner circumferential surface of the 99 A inner diameter cylindrical section, is tapered, it is possible to effectively prevent the seal ring 105 A, which extends outwards in the axial direction, from turning upwards even when the seal ring 105 A fits into the small diameter stepped section 104B.
[0113] In addition, in the embodiment, a labyrinth seal is formed between the end of the tip end of the small diameter cylindrical section 99 A and the end of the outer perimeter of the stepped surface 106, so it is possible to prevent foreign matter from entering through the hole drain water 94 reach seal ring 105 A. Therefore, it is possible to prevent premature wear of the ends at the tip ends of the sealing lips 109 A, 109B. In addition, fabricating the cover 93B using a non-magnetic material, such as non-magnetic stainless steel and making the end of the tip end of the cylindrical section of internal diameter 99 A face very close to the part of the perimeter of the stepped surface 106 it is possible to maintain the amount of magnetic flux from the encoder 30 that reaches the magnetic sensing element of the sensor without the magnetic flux leaking into the cover 93B. Therefore, it is possible to sufficiently maintain the reliability of the sensor's rotational speed measurement. REFERENCE LISTING 1, 1 a, 1b hub unit support 2 outer ring members 3 inner ring member (hub) 4 sliding elements (balls) 5 rotational speed detector 6 external raceway 7 stationary side flange 8 main hub 9 inner ring 10 internal raceway 11 sliding side flange 12 outer ring for a constant speed joint 13 key hole 14 sealing ring 15 sliding element installation space 16 combined seal ring 17, 17 a, 17b coverage 18 sealing member 19 encoder 20 sensor 21 projection ring 22 detection space 23, 23a water drain hole 24 large diameter cylindrical section 25 disk section 26 small diameter cylindrical section 27 large diameter cylindrical section 28 side wall section 29 small diameter cylindrical section 30 disk section 31 cylindrical section of internal diameter 32 volume section 33, 33a, 33b, 33c hub unit support 34, 34a outer ring member 35, 35a inner ring member (hub) 36, 36a 9 sliding elements (balls) 37a, 37A, 27b, 37B seal 38 rotational speed detector 39, 39A, 39B, 39C, 39D cover 40 articulation 41 retaining hole 42 stationary side flange 43 screw 44 main hub 45, 45A, 45B inner ring 46 swiveling side flange 47 hub bolt 48 key hole 49 staggered section of small diameter 50 a, 50b external raceway 51 a, 51b internal raceway 52 retainer 53 sliding element installation space 54 internal circumferential surface 55 metal core 56 elastic sealing section 57 outer circumferential surface 58 sealing lip 59 projection ring 60 encoder 61 sensor 62 detection section 63 surface detected 64 through hole 65 disk section 66 small diameter cylindrical section 67 large diameter cylindrical section 68 outer circumferential surface 69 staggered section 70 inner end surface 71, 71C, 71D, 71E cut and raised section 72, 72 C, 72D, 72E cutting plane line 73 water drain hole 74 sensor hole 75, 75 The coverage 76 disk section 77 cylindrical section 78 flange section 79 internal circumferential surface 80 groove section 81 water drain hole 82 coverage 83 large diameter cylindrical section 84 staggered section 85 small diameter cylindrical section 86 disk section 87 cylindrical section of internal diameter 88 small diameter outer circumferential section 89 seal 90 metal core 91 sealing lips 92 elastic sealing section 93, 93 A, 93B coverage 94, 94 The water drain hole 95 large diameter cylindrical section 96 side wall section 97 small diameter cylindrical section 98 disk section 99, 99 The inner diameter cylindrical section 101 lower end section 102 coverage section 103 lower end section 104, 104 The small diameter stepped section 105, 105 A O-ring 106 staggered surface 107 metal core 108, 108 A sealing member 109, 109 A, 109B sealing lips 110, 110 The sealing surface 111 edge section 112 combined sealing ring 113 projection ring 114 retainer 115 device 116 connector 117 side wall section 118 concave relief groove 119 molded shear stone 120 fat.

权利要求:
Claims (13)
[0001]
Hub unit support, comprising: an outer ring member, which is a stationary ring; an inner ring member, which is a rotation ring that can rotate with respect to the outer ring member via a plurality of rotation elements; and a cover that covers the inner end sections in the axial direction of the outer ring member and inner ring member; the cover having: a disc section and a cylindrical section that curves out in the axial direction, from the end section of the outer perimeter of the disc section and is fitted and secured to the outer ring member, and the cylindrical section having a cut section and an elevated section that is formed in the circumferential part of the cylindrical section being cut and raised towards the inner or outer part, in the radial direction of the cylindrical section, such that this cut and raised section forms a hole for drainage of water that passes through the inner part to the outer part of the cover.
[0002]
Hub unit support according to claim 1, in which the cut and raised section is cut and raised by cutting two lines with a cutting plane along the circumferential direction of the cylindrical section and the drain holes are formed in both the sides in the axial direction of the cut and raised section.
[0003]
Hub unit support according to claim 1, wherein the cut and raised section is cut and raised by cutting a flat line of cut along the circumferential direction of the cylindrical section, such that one side in the axial direction the cut and raised section is continuous with the cylindrical section and the water drain hole is formed on the other side, in the axial direction.
[0004]
Hub unit support according to claim 3, wherein the cut and raised section has an L-shaped cross section in the cross section in the axial direction of the cover.
[0005]
Hub unit support according to claim 3, in which the cut and raised section has a linear cross-section in the cross section, in the axial direction of the cover.
[0006]
Hub unit support, comprising: an outer ring member, which is a stationary ring; an inner ring member, which is a rotating ring that can rotate with respect to the outer ring member via a plurality of rotating elements; and a cover that covers the inner end sections in the axial direction of the outer ring member and inner ring member; the cover having: a disk section; and a cylindrical section that is curved outwardly, in the axial direction, from the perimeter end section of the disk section and is fitted and secured to the outer ring member, and the cylindrical section having a groove section that has a recess towards the inner or outer part, in the radial direction along the axial direction, and a water drainage hole that passes through the inner part to the outer part of the cover is formed in the part between the groove section and the member outer ring.
[0007]
Hub unit support according to claim 6, in which the groove section is formed in the cylindrical section, such that the groove section is parallel to the axial direction of the cover.
[0008]
Hub unit support according to claim 6, in which the groove section is formed in the cylindrical section, such that the groove section is inclined with respect to the axial direction of the cover.
[0009]
Hub unit support, comprising: an outer ring member, which is a stationary ring; an inner ring member which is a rotation ring that can rotate with respect to the outer ring member via a plurality of rotation elements; and a cover that covers the inner end sections in the axial direction of the outer ring member and inner ring member, the cover having: a disc section; and a cylindrical section that is curved out in the axial direction, from the perimeter end section of the disc section and fits with and is attached to the outer ring member, and the cylindrical section having at least: a cylindrical section of long diameter that fits and is attached to the inner end section part, in the axial direction of the outer ring member; a side wall section that curves inward in the radial direction, from the inner end section in the axial direction of the long diameter cylindrical section, with the outer surface in the axial direction coming into contact with the inner end surface in the axial direction the outer ring member; and a small diameter cylindrical section that is continuous with the disk section and curves inward in the axial direction, from the inner end section in the radial direction of the side wall section, and a water drainage hole is formed in a part in the circumferential direction of the cylindrical section that connects the small diameter cylindrical section and the side wall section and the lower end section of the water drain hole located in the middle section in the radial direction of the side wall section is located more down than the lower end section of the inner circumferential surface of the inner end section in the axial direction of the outer ring member.
[0010]
Hub unit support according to any one of claims 1, 6 and 9, further comprising: a sealing member made of elastic material and provided in the inner end section in the radial direction of the disc section, the end end of the sealing lip tip of the sealing member coming into contact around the entire surface of the ring member inner, or a separate member that rotates together with the inner ring member.
[0011]
Hub unit support according to any one of claims 1, 6 and 9, further comprising: an inner diameter of the cylindrical section that curves outwardly in the axial direction of the inner end section in the radial direction of the disc section, the inner circumferential surface of the inner diameter cylindrical section functioning as a sealing surface with which the end end the tip of the sealing member made of elastic material, which is a seal provided between the cover and the inner ring member or separate member that rotates together with the inner ring member enters the sliding count with the entire circumferential direction.
[0012]
Hub unit support according to any one of claims 1, 6 and 9, in which the water drain hole, during operation, is located within a range of ± 35 ° in the circumferential direction with a point intersection where a lead line that passes through the central axis of the roof crosses the lower end section of the roof.
[0013]
Hub unit support according to any one of claims 1, 6 and 9, wherein an encoder is provided on the outer circumferential surface of the inner end section in the axial direction of the inner ring member, and a sensor having a detection facing the encoder is provided in the cylindrical section of the cover disk section.

类似技术:

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公开号 | 公开日 | 专利标题

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BR112012004313B1|2021-01-12|HUB UNIT SUPPORT

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KR100799647B1|2008-01-30|Seal integrated with encoder for bearing

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JP2005009525A|2005-01-13|Rolling bearing unit for supporting wheel with encoder

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JP2002333035A5|2002-11-22|

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同族专利:

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公开号 | 公开日

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US9796212B2|2017-10-24|

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US20150147013A1|2015-05-28|

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BR112012004313A2|2016-03-15|

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CN102143849B|2013-07-17|

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CN102143849A|2011-08-03|

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US20120281939A1|2012-11-08|

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US20150078691A1|2015-03-19|

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US9815328B2|2017-11-14|

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法律状态:
2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2019-09-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

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2020-11-03| B09A| Decision: intention to grant|

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2021-01-12| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 12/01/2021, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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JP2009232099|2009-10-06|

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JP2009-232099|2009-10-06|

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JP2010-068333|2010-03-24|

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JP2010068333A|JP5598044B2|2010-03-24|2010-03-24|Hub unit bearing|

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JP2010-106291|2010-05-06|

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JP2010106291A|JP5494197B2|2009-10-06|2010-05-06|Rolling bearing unit with rotational speed detector|

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PCT/JP2010/067258|WO2011043266A1|2009-10-06|2010-10-01|Hub unit bearing|

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