• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a shaft device with a rotatable shaft (4) which has a hole (9) running through it in its longitudinal direction. According to the invention, the device further comprises a rod (10) running in the longitudinal direction of the shaft (4), through the hole (9) from one end of the shaft (4) to the other. The rod (10) is provided at one end with a radially directed support element (14). The support element (14) is situated axially beyond the end of the shaft (4) and extends radially beyond the outside diameter of the shaft at the end. The invention relates also to a method for supporting a shaft by means of the invented shaft device.
    公开号:SE0950142A1
    申请号:SE0950142
    申请日:2009-03-11
    公开日:2010-09-12
    发明作者:Kenneth Hagberg；Joergen Forsberg
    申请人:Scania Cv Abp；
    IPC主号:
    专利说明:

    Disclosure of the invention The object set out is achieved from the first aspect of the invention in that a shaft device of the type indicated in the introduction has the special features that the device further comprises a rod extending in the longitudinal direction of the shaft through the hole from a first end of the shaft to the other end. of the shaft, which rod at said first end is provided with a radially directed support element axially located outside said first end and which extends radially outside the outer diameter of the shaft at said first end.
    With the aid of such a designed shaft device, the shaft can be stored without the precision of the bearing being affected by temperature changes. The rod can be fixed axially relative to the shaft at the other end of the shaft, the axial position of the support element relative to the shaft being substantially maintained regardless of temperature changes. This, of course, provided that the rod is of a material with approximately the same coefficient of thermal expansion as the material of the shaft. Suitably the rod and the shaft are of the same material such as e.g. steel. With the same material in the bar and shaft, the precision regarding maintaining the relative axial position of the support element and the first shaft end is maximized.
    When the shaft is to be stored in a storage that i.a. comprises an axial force-absorbing rolling bearing at or near the first end of the shaft, the support element can serve as axial support for the stationary ring of the bearing. Due to the fact that the relative axial position of the support element and the shaft end is not changed by temperature changes, the bearing precision, ie. set play or bias not to change.
    If the outer ring were instead mounted in the conventional support structure in a conventional manner and receives its axial support from it, it changes its axial position relative to the shaft end with changing temperature and requires adjustments and measures to compensate for this.
    With the invented shaft device, problems associated with such compensatory measures are thus eliminated because the support element provides an axial support surface which is unaffected by temperature changes. The invented storage device thus makes it easier to store the shaft with an optimal setting over a large temperature range in a simple manner. Furthermore, the need to take other measures to set a fixed stock game is eliminated. Suitably, though not necessarily, the hole through the shaft is circular and suitably it is coaxial with the shaft. The rod is also suitably circular and should be coaxial with the hole.
    According to a preferred embodiment of the invented shaft device, the support element extends radially outside the outer diameter of the shaft at a plurality of circumferentially distributed places.
    A support element so designed enables axial support in several circumferentially distributed places of the outer ring of the rolling bearing so that the force absorption is distributed.
    According to a further preferred embodiment, these places are distributed with equal distances in circumferential direction.
    The support for the axial force absorption is thus symmetrically evenly distributed so that the force on the outer ring is evenly distributed and the risk of skewing it is eliminated.
    According to a further preferred embodiment, the support element extends beyond the outer diameter around the entire circumference of the shaft.
    Thus, the power consumption is as evenly distributed as possible, which results in optimal operational reliability. The support element can then e.g. have a circular outer contour and be designed as a disc.
    According to a further preferred embodiment, the support element has an axial inner surface with a radially outer portion and a radially inner portion, which radially outer portion is axially displaced towards the shaft relative to the radially inner portion.
    This facilitates that the support element moves axially free from axial contact with the shaft end and the rotating parts of the bearing while the outer ring of the bearing can be supported at an axial position which coincides with the end of the shaft or at an axial position a short distance into the shaft.
    According to a further preferred embodiment, the support element is fastened to the rod with fastening means so arranged that the axial position of the support element on the rod is adjustable.
    Thus, the axial position of the support element can be adapted relative to the shaft so that optimal precision for the axial support of the outer ring is achieved for the operating temperatures that can be predicted. The arrangement also allows for some readjustment.
    According to a further preferred embodiment, the fastening means comprises a threaded portion of the rod and a nut. 20 25 30 4 Thus, the said axial positioning of the support element can be achieved in a simple and reliable manner.
    According to a further preferred embodiment, the rod is arranged with radial play in the hole.
    This avoids the risk of contact between the rod and the shaft, which would lead to friction losses and the risk of malfunctions.
    According to a further preferred embodiment, the rod at the other end of the shaft is provided with a second radially directed support element axially located outside said second end and extending radially outside the outer diameter of the shaft at said second end.
    With this embodiment it is possible that an axial force-absorbing rolling bearing at the other end of the shaft is also given the same type of axial support.
    When the support elements are pressed against the respective outer ring of a rolling bearing at each shaft end, the axial distance between the outer rings will thereby change in unison with changes in the length of the shaft as a result of temperature changes, ie. the axial distance is fixed relatively speaking. This provides an easy-to-handle shaft package that can be mounted in a support structure with guaranteed bearing precision. Suitably, the support structure has axial support surfaces which limit the possibility of the respective support elements for outward axial movement.
    According to a further preferred embodiment, the second support element is designed in a manner indicated above for the first support element, in particular according to any of the preferred embodiments described above. Thus, the second support element will thus also have corresponding advantages.
    The support elements are suitably of identical design, but may alternatively be designed according to mutually different embodiments.
    According to a further preferred embodiment, the rod at the other end of the shaft is provided with axial fixing means for fixing the axial position of the corresponding end of the rod relative to a support structure.
    This embodiment constitutes an alternative to the embodiment described directly above and facilitates the mounting of the shaft device at the first shaft end, since the first support ring thus does not need a special stop against outward axial movement.
    A bearing arrangement according to the invention comprises on the one hand the invented shaft device, in particular in accordance with any of the preferred embodiments thereof, and on the other hand at least a first axial force-receiving roller bearing with a shaft rotating with the shaft, a stationary ring, and roller bodies arranged therebetween , said first support element being arranged pressing against the stationary ring, the axial mobility of which is thereby limited only by on the one hand the roller bodies of the bearing and on the other hand of said first support element.
    In this patent application, axial force-absorbing rolling bearings refer not only to a bearing which absorbs only axial forces but also to bearings which absorb both axial forces and radial forces, such as e.g. a tapered roller bearing.
    According to a preferred embodiment of the invented bearing arrangement, it further comprises a second axial force absorbing roller bearing for axial force opposite to the axial force which the first axial bearing is arranged to receive, which second roller bearing has a shaft rotating ring, a stationary ring, and roller bodies located therebetween , said second support element being arranged pressing against the stationary ring, the axial movement of which is thereby limited only by on the one hand the roller bodies of the bearing and on the other hand by said second support element.
    A gearbox according to the invention comprises a storage arrangement in accordance with the invention.
    A vehicle according to the invention comprises a gearbox in accordance with the invention.
    The invented storage arrangement, the invented gearbox and the invented vehicle entail advantages of the same kind as the advantages of the invented axle device and the preferred embodiments thereof, which advantages have been described above.
    According to the second aspect of the invention, a method of bearing a shaft comprises the special measures - that a hollow shaft is provided, - that a rod is pushed in through the hole of the shaft, - that the shaft is mounted with bearings comprising a first axial force absorbing roller bearing, with a shaft rotatable , a stationary ring and roller bodies between them, - that a first support element is mounted on the rod at a first end of the shaft, - that said first support element is caused to press the stationary ring against the roller body of the rolling bearing, so that the axial movement of the stationary ring is limited only by, on the one hand, the roller bodies of the bearing and, on the other hand, of said first support element, - that the shaft bearing is mounted in a support structure in such a way that the support structure limits the axial mobility of said first support element.
    According to preferred embodiments of the invented method, this is practiced using a shaft device according to the invention, in particular according to any of the preferred embodiments thereof. The invented method also entails advantages of the same kind as stated above for the invented shaft device and the preferred embodiments thereof.
    The invention is explained in more detail by the following detailed description of exemplary embodiments thereof and with reference to the accompanying drawings.
    Brief Description of the Drawings Fig. 1 is a longitudinal section through a part of a gearbox according to a first embodiment of the invention.
    Fig. 2 is a corresponding section according to a second embodiment.
    Description of exemplary embodiments Figure 1 is a longitudinal section through a part of a gearbox according to the invention.
    The gearbox has a housing 1 which forms a support structure for the axles of the gearbox. The gearbox in the example has a main shaft 2 and a side shaft 4. The invention is described in connection with the side shaft 4., which is designed with a shaft device and a storage arrangement in accordance with the invention. Other parts of the gearbox are in principle of a conventional type and are not described in more detail here. The side shaft 4, in the hereinafter referred to as the shaft 4, is provided with some gears 5 in cooperation with the main shaft 2.
    The shaft 4 is mounted in a first conical roller bearing 7 at one end of the shaft 4 and a second conical roller bearing 8 at the opposite end of the shaft 4. A concentric circular hole 9 is accommodated in the shaft 4 which runs through the entire length of the shaft 4. A rod 10 with a small play in the hole 9 extends through the hole 9 so that contact with the shaft is avoided. The bar is attached with its left end to a portion 11 of the end wall of the housing 20 in the figure. The attachment is effected by the end 13 of the rod 10 being threaded and screwed into a threaded hole in the portion 11 of the end wall.
    At the right end of the rod 10 a support element 14 in the form of a circular disc 14 is attached. The disc 14 has a central hole by means of which it is threaded onto the rod 10 and screwed on by means of a nut 17 and a threaded end portion of the rod 10.
    By adjusting the left end of the rod 10 in the hole 12 in the end wall portion 11 and / or tightening the nut 17, the inside of the radially outer part 142 of the disc 14 is pressed against the stationary outer ring 71 of the bearing 7. The disc 14 thus constitutes a force-absorbing support for the bearing 7 for axial forces. to the right.
    The bearing of the left end of the shaft 4 is in this example carried out in a conventional manner, where the second bearing 8 with its outer ring abuts against an axial support surface of the end portion 11 for receiving axial forces directed to the left.
    The housing 1 is made of aluminum and the shaft 4 as well as the continuous rod 10 are made of steel. If the gearbox is heated to a higher temperature than that which is at hand in the condition shown in Fig. 1, both the housing 1 and the shaft 4 and the rod 10 will expand both radially and axially. Since the housing 1 is made of aluminum, it will expand in a higher yard than the shaft 4 and the rod 10. In the radial direction these are values so small that it does not lead to any problem, while the difference in expansion in the axial direction can amount to several tenths mm.
    When the housing 1 expands axially relative to the shaft, this means that the part 21 of the housing in which the right bearing 7 is mounted is moved in a direction to the right relative to the end of the shaft 4 and relative to the disc 14 fixed to the rod 10.
    Since said part 21 of the housing has no axial stop surface for the outer ring 71, the axial support of the bearing 7 is not affected. It consists of the disc 14 and its position is unchanged relative to the shaft. Thus, the setting of play or bias of the two bearings 7, 8 is unaffected by the temperature difference.
    As can be seen, the disc 14 has a radially outer portion with a surface 142 facing the outer ring 71 which is offset inwardly relative to the rest of the disc. This is to create a clearance space between the disc 7 and the shaft and the roller bodies, respectively. An alternative possibility is to arrange an intermediate ring between the outer ring 71 and the disc 14. With a more accentuated displacement of the surface 142 or with an intermediate ring with a marked axial extent, the axial bearing 7 can be located some distance into the shaft. The second exemplary embodiment illustrated in Fig. 2 differs from that in Fig. 1 with respect to the attachment of the rod and with respect to a detail of the disc at the right end of the shaft, but is otherwise made in the same way.
    In this example, the rod 10 is not fixed to the end of the housing but is also provided at its left end with a device of a similar type as at the right end. Thus, the rod is not anchored in the housing at the left end. Instead, a stop member 14b in the form of a disc 14b is attached to the rod 10 by means of a threaded nut 17b.
    Thus, the shaft 4, the rod 10, the two discs 14, 14b, and the bearings 7, 8 will form a cohesive package with temperature-independent fixed distance between the bearings 7, 8 so that they maintain an unchanged setting.
    At the left end of the shaft, the disc 14b is clamped between the outer ring 81 of the bearing and an axial support surface 110b of a gable portion 11b of the housing. At the right end of the shaft, a stop ring 18 is attached to a housing part 21b and arranged to limit the movement of the disc 14 axially outwards from the shaft.
    As the housing 1 expands axially relative to the shaft 4, the distance between the axial support surface 110b in the end portion 11b and the padding 18 will increase a few tenths of a mm more than the distance between the discs 14, 14b. Thus, a corresponding axial play will occur. However, that play will not affect the presetting of the bearings as this is maintained by the cohesive forces between the discs 14, 14b. The shaft thus acquires a certain axial mobility, but which is acceptable from other aspects than the bearing, which in itself is unaffected.
    The axial force from the package is absorbed by the axial support surface 110b in the end portion 11b or by the support ring 18 in the housing part 21b depending on the direction in which the axial force acts.
    权利要求:
    Claims (17)
    [1]
    Shaft device comprising a rotatable shaft (4) with a longitudinal hole (9) extending in its longitudinal direction, characterized in that the device further comprises a rod (10) extending in the longitudinal direction of the shaft (4) through the hole (9) from a first end of the shaft to a second end of the shaft, which rod at said first end is provided with a radially directed support element (14) axially located outside said first end and extending radially outside the outer diameter of the shaft (4) at said first end.
    [2]
    Shaft device according to Claim 1, characterized in that the support element (14) extends radially outside the outer diameter of the shaft (4) at a plurality of circumferentially distributed places.
    [3]
    Shaft device according to claim 2, characterized in that said plurality of places are distributed with equal mutual distances in circumferential direction.
    [4]
    Shaft device according to claim 1, characterized in that the support element (14) extends radially outside the outer diameter of the shaft (4) at said first end around the entire circumference of the shaft.
    [5]
    Shaft device according to one of Claims 1 to 4, characterized in that the support element has an axial inner surface with a radially outer portion (142) and a radially inner portion (143), which radially outer portion (142) is axially displaced towards the shaft (4). ) in relation to the radially inner portion (143).
    [6]
    Shaft device according to one of Claims 1 to 5, characterized in that the support element (14) is fastened to the rod (10) by fastening means (17) so arranged that the axial position of the support element (14) on the rod (10) is adjustable.
    [7]
    Shaft device according to claim 6, characterized in that the fastening member (17) comprises a threaded portion of the rod and a nut (17). 20 25 30 10
    [8]
    Shaft device according to any one of claims 1-7, characterized in that the rod (10) is arranged with a radial play in said hole (9).
    [9]
    Shaft device according to claim 8, characterized in that the rod (10) at the other end of the shaft is provided with a second radially directed support element (14b) axially located outside said second end and extending radially outside the outer diameter of the shaft (4) at said second end.
    [10]
    Support element (14b) has the features stated in any one of claims 2 to 6 for the shaft device according to claim 9, characterized in that said second support element (14) located at the first end of the rod (10).
    [11]
    The rod (10) at the other end of the shaft (4) is provided with axial position fixing means Shaft device according to any one of claims 1-8, characterized in that (12, 13) for fixing the axial position of the corresponding end of the rod (10) relative to a support structure (1 ).
    [12]
    Comprises a shaft device according to any one of claims 1 to 11 and at least one bearing arrangement characterized in that the bearing arrangement comprises first axial force-absorbing roller bearing (7) with a ring (72) rotating with the shaft, a stationary ring (71), and roller bodies (73) arranged therebetween ), said first support element (14) being arranged pressing against the stationary ring (71), the axial mobility of which is thereby limited only by on the one hand the roller bodies (73) of the bearing and on the other hand of said first support element (14).
    [13]
    Claims 9 - 11, characterized in that the storage arrangement further comprises storage arrangements according to claim 12 as this depends on one of a second axial force absorbing roller bearing (8) for axial force opposite to the axial force which the first roller bearing (7) is arranged to receive, which second roller bearing ( 8) has a ring (81) rotating with the shaft (4), a stationary ring (82), and between them located roller bodies (83), said second support element (14b) being arranged pressing against the stationary ring (82), 11 whose axial mobility is thereby limited only by on the one hand the roller bodies (83) of the bearing and on the other hand by said support elements (14b).
    [14]
    Gearbox characterized in that the gearbox comprises a storage arrangement according to claim 12 or 13.
    [15]
    Vehicle characterized in that the vehicle is provided with a gearbox according to claim 14.
    [16]
    Method for storing a shaft characterized by
    [17]
    17. that a hollow shaft is provided, that a rod is pushed in through the holes of the shaft, that the shaft is mounted with bearings comprising a first axial force absorbing roller bearing, with a ring rotatable with the shaft, a stationary ring and roller bodies therebetween, that a first support member is mounted on the rod at a first end of the shaft, that said first support element is caused to press the stationary ring against the roller body of the rolling bearing, so that the axial movement of the stationary ring is limited only by on one side the roller bodies of the bearing and on the other side of said first support element a support structure in such a way that the support structure limits the axial mobility of said first support element. Method according to claim 16, characterized in that the method is carried out using a shaft device according to any one of claims 1 - 11.
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    同族专利:
    公开号 | 公开日
    RU2478842C1|2013-04-10|
    EP2406511A1|2012-01-18|
    WO2010104455A1|2010-09-16|
    CN102348902A|2012-02-08|
    SE533565C2|2010-10-26|
    EP2406511A4|2016-03-16|
    BRPI1005937A2|2019-09-24|
    CN102348902B|2015-11-25|
    SE533565E|2013-04-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE924789C|1951-11-30|1955-03-07|Kramer G M B H Maschf Geb|Screw device for the common axial adjustment of the radial-axial roller bearings held together by a screw clamping device of intermediate wheels mounted on two sides between the gearbox and the differential of motor vehicles|
    US2880041A|1955-03-29|1959-03-31|Rockwell Standard Co|Bearing mounting structure|
    DE1198684B|1960-12-27|1965-08-12|Volkswagenwerk Ag|Two-sided mounting of a hollow shaft carrying a drive bevel gear of an axially offset bevel gear drive in a light metal housing for motor vehicles|
    CH430341A|1964-01-11|1967-02-15|Sameco Payerne S A|Adjustable storage|
    DE3140330C2|1981-10-10|1989-01-05|Audi Ag, 8070 Ingolstadt, De|
    US5386630A|1993-09-27|1995-02-07|The Timken Company|Process and tool for adjusting bearings|
    DE19932804A1|1999-07-14|2001-01-18|Volkswagen Ag|Shaft bearing system comprises two reduced friction bearings connected by clamping component which passes through longitudinal bore in shaft|
    WO2006046891A1|2004-10-28|2006-05-04|Volvo Lastvagnar Ab|Turbo charger unit with bearings for a rotor shaft|
    US8087323B2|2006-05-17|2012-01-03|Volvo Lastvagnar Ab|Gear transmission with reduced transmission wall housing deflection|
    DE102007034085B4|2007-07-21|2018-11-29|Volkswagen Ag|Transmission for a vehicle, in particular a motor vehicle|CN111043167B|2019-12-05|2021-12-31|诸城市惠林精密机械有限公司|Connecting device for bearing grading transmission|
    法律状态:
    2013-08-06| RPOP| Patent has been republished in amended form after opposition|
    2017-10-31| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE0950142A|SE533565E|2009-03-11|2009-03-11|Shaft device and method for storing a shaft|SE0950142A| SE533565E|2009-03-11|2009-03-11|Shaft device and method for storing a shaft|
    BRPI1005937A| BRPI1005937A2|2009-03-11|2010-03-03|shaft device and method to support a shaft|
    RU2011141092/11A| RU2478842C1|2009-03-11|2010-03-03|Shaft arrangement, and shaft supporting method|
    CN201080011536.3A| CN102348902B|2009-03-11|2010-03-03|Shaft device and the method for back shaft|
    PCT/SE2010/050247| WO2010104455A1|2009-03-11|2010-03-03|Shaft device and method for supporting a shaft|
    EP10751089.3A| EP2406511A4|2009-03-11|2010-03-03|Shaft device and method for supporting a shaft|
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