• 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 present invention improves the degree of design freedom of a balancer device. This balancer device is provided with: a balancer shaft; a balancer housing; and an oil pump housing that has an oil pump housing formed separately from the balancer housing and that is attached to the balancer housing. The balancer housing is provided with an upper housing and a lower housing that is formed separately from the upper housing. The lower housing is provided with first to third bosses for fastening the oil pump to the lower housing. The first and second bosses each protrude downward at one end side, in the axial direction, of the balancer shaft. The third boss is disposed above the first and second bosses. The first and second bosses are disposed separately from each other in a direction orthogonal to the axial direction such that a recessed portion is formed between the first and second bosses. The oil pump is provided with a suction portion having an opening. The suction portion is at least partially disposed in the recessed portion.
    公开号:ES2695473A2
    申请号:ES201890052
    申请日:2017-02-14
    公开日:2019-01-04
    发明作者:Masahumi Kurita
    申请人:Hitachi Automotive Systems Ltd；
    IPC主号:
    专利说明:

    [0001]
    [0002] Balancing device
    [0003]
    [0004] Technical field
    [0005]
    [0006] The present invention relates to a balancing apparatus.
    [0007]
    [0008] Background of the technique
    [0009]
    [0010] The document PTL 1 discloses a balancing device coupled with an oil pump. In this balancing apparatus, an oil pump housing containing an oil pump mechanism therein, and a balancer housing containing a balancer shaft therein are formed integrally with each other.
    [0011]
    [0012] Appointment list
    [0013]
    [0014] Patent Literature
    [0015]
    [0016] [PTL 1] Japanese Patent No. 3668548
    [0017]
    [0018] Summary of the invention
    [0019]
    [0020] Technical problem
    [0021]
    [0022] The formation of the housing of the oil pump and the balancer housing integrally with each other, however, leads to low design flexibility.
    [0023]
    [0024] Solution to the problem
    [0025]
    [0026] According to a first aspect of the present invention, a balancing apparatus is provided. This balancing apparatus includes a balancer shaft configured to rotationally drive, a balancer housing that rotatably contains the balancer shaft therein, and an oil pump that includes an oil pump housing formed separately from the balancer housing and fixed to balancer housing. The balancer housing includes a top housing and a bottom housing formed separately from the top housing. The lower housing includes a first bolt and a second bolt configured to hold the oil pump in the lower housing and protruding down an end side of an axial direction of the balancing shaft, and a third bolt configured to hold the pump of oil to the lower housing and disposed on an upper side with respect to the first bolt and the second bolt. The first bolt and the second bolt are arranged to be separated from each other in a direction orthogonal to the axial direction such that a lowered portion is formed therebetween. The oil pump includes an intake portion that has an opening portion for the introduction of oil into the oil pump. The admission portion is disposed at least partially in the recessed portion.
    [0027]
    [0028] According to the balancing apparatus described above, the balancer housing and the oil pump housing are different elements. Therefore, the balancing apparatus can be designed in a highly flexible manner. In addition, the first bolt and the second bolt protrude downwards, so that the first to third bolts can be arranged in a wide width in a vertical direction. In other words, the oil pump can be supported on a larger scale. Therefore, the oil pump can be supported with improved rigidity. In addition, the intake portion of the oil pump is disposed at least partially in the recessed portion formed between the first bolt and the second bolt, which helps to avoid or reduce an increase in the height of the balancing apparatus due to the downward protrusion of the first bulon and second bulon.
    [0029]
    [0030] According to a second aspect of the present invention, in the first aspect, the lower housing includes a fourth bolt configured to hold the oil pump in the lower housing and disposed on the upper side with respect to the first bolt and the second bolt. According to this aspect, the oil pump can be supported by at least four points, and therefore can be supported with improved rigidity.
    [0031]
    [0032] According to a third aspect of the present invention, in the first or second aspects, the first bolt includes a first screw hole in a distal end side thereof. The second bolt includes a second screw hole in a distal end side thereof. Half or more of the intake portion is disposed on an upper side with respect to an imaginary line connecting a center of the first screw hole and a center of the second screw hole in a cross section orthogonal to the axial direction. According to this aspect, the increase in the height of the balancing apparatus can be avoided or reduced effectively.
    [0033]
    [0034] According to a fourth aspect of the present invention, in any of the first to the third aspects, the opening portion opens to an opposite end side in the axial direction. According to this aspect, the increase in the height of the balancing apparatus can be avoided or reduced.
    [0035]
    [0036] According to a fifth aspect of the present invention, in the fourth aspect, the balancing apparatus further includes a filter that extends in the axial direction and includes a first end portion connected to the opening portion and a second open end portion. down. According to this aspect, although the increase in the height of the balancing apparatus is prevented or reduced, the oil can be introduced from a desired position into an oil pan covering a lower side of the balancing apparatus.
    [0037]
    [0038] According to a sixth aspect of the present invention, in any of the first to the third aspects, the opening portion opens downward. According to this aspect, the increase in the height of the balancing apparatus can be avoided or reduced.
    [0039]
    [0040] According to a seventh aspect of the present invention, in the sixth aspect, the intake portion includes a filter portion extending from the opening portion downwardly. The filter portion is formed integrally with the intake portion. According to this aspect, the quantity of components can be reduced. In addition, the filter portion allows the oil to be easily introduced.
    [0041]
    [0042] According to an eighth aspect of the present invention, in the second aspect or any of the third to seventh aspects including the second aspect, at least one of the third and fourth bolts are formed so that they protrude upwardly beyond the surfaces of contact between the upper housing and the lower housing. According to this aspect, the first to fourth bolts can be arranged over an additional width in the vertical direction without being accompanied by an increase in the height of the balancing apparatuses. Therefore, the oil pump can be supported with additionally improved stiffness.
    [0043]
    [0044] According to a ninth aspect of the present invention, in the second aspect, any of the third to seventh aspects including the second aspect, or the eighth At least one of the bolts first to fourth is reinforced by a reinforcing rib extending from the lower housing. According to this aspect, the oil pump can be supported with additionally improved stiffness.
    [0045]
    [0046] According to a tenth aspect of the present invention, in the ninth aspect, the lower housing includes a bearing support portion that partially contains a bearing configured to rotatably support the balancer shaft. The reinforcing rib is connected to the bearing support portion. The bearing support portion is normally formed to have a greater stiffness than other portions of the housing, so that, in accordance with this aspect, the oil pump can be supported with an additionally improved stiffness.
    [0047]
    [0048] According to an eleventh aspect of the present invention, in the tenth aspect, the reinforcing rib connects at least one of the first bolt and the second bolt and at least one of the third bolt and the fourth bolt, and the bearing support portion each. According to this aspect, the oil pump can be supported with additionally improved stiffness.
    [0049]
    [0050] According to a twelfth aspect of the present invention, in any of the first to the eleventh aspects, the balancer shaft includes a drive shaft to which is transmitted a rotational force of a crankshaft of a motor, and a driven shaft configured to rotate in an opposite direction from the drive shaft by a rotational force transmitted from the drive shaft. The rotational force is transmitted to the oil pump by the drive shaft or the driven shaft. According to this aspect, the balancing apparatus can have a compact size.
    [0051]
    [0052] According to a thirteenth aspect of the present invention, a balancing apparatus is provided. This balancing device includes a balancer shaft configured to rotate, a balancer housing that rotatably contains the balancer shaft therein and includes a first balancer housing and a second balancer housing formed separately from the first housing of balancer and coupled with the first balancer housing, and an oil pump including an oil pump housing formed separately from the balancer housing and fixed to the first balancer housing. The balancer housing includes a first bolt and a second bolt configured to hold the oil pump in the first balancer housing and protruding downward at an end side of an axial direction of the balancer shaft, and a third bolt configured to hold the oil pump in the first balancer housing and disposed on an upper side with respect to the first bolt and the second bolt. The first bolt and the second bolt are arranged so that they are separated from one another in a direction orthogonal to the axial direction such that a lowered portion is formed between them. The oil pump includes an intake portion that has an opening portion for the introduction of oil into the oil pump. The admission portion is disposed at least partially in the recessed portion. According to this balancing apparatus, an effect similar to the first aspect is achieved. Any of the third to eleventh aspects can also be applied to the thirteenth aspect.
    [0053]
    [0054] According to a fourteenth aspect of the present invention, in the thirteenth aspect, the first bolt includes a first screw hole in a distal end side thereof. The second bolt includes a second screw hole in a distal end side thereof. Half or more of the admission portion is disposed on an upper side with respect to an imaginary line connecting a center of the first screw hole and a center of the second screw hole in a cross section orthogonal to the axial direction. According to this aspect, an effect similar to the third aspect is achieved.
    [0055]
    [0056] According to a fifteenth aspect of the present invention, in any of the first to fourteenth aspects, the balancing apparatus includes a speed reduction mechanism. The oil pump is a variable displacement oil pump capable of varying a volume of discharge of the same. A turning force is transmitted from the balancer shaft to the oil pump through the speed reduction mechanism.
    [0057]
    [0058] According to a sixteenth aspect of the present invention, in the fifteenth aspect, the balancing shaft includes a drive shaft to which a rotational force of a crankshaft of a motor is transmitted, and a driven shaft configured to rotate in one direction. opposite to the drive shaft by a turning force transmitted from the drive shaft. The speed reduction mechanism includes a drive gear and a driven gear having a greater number of teeth than the drive gear. The drive gear is fixed to the driven shaft. The driven gear is fixed to a drive shaft of the oil pump. According to this aspect, the oil pump can be operated at a relatively low speed, so that the efficiency of the pump is improved, as a result of which the fuel efficiency is improved.
    [0059]
    [0060] According to a seventeenth aspect of the present invention, in the sixteenth aspect, the recessed portion is disposed just below the driven shaft. A shaft center of the driven shaft is disposed on an upper side with respect to the center of a shaft of the driven gear. According to this aspect, the depth of the recessed portion can be increased by an amount corresponding to the upward displacement of the center axis of the driven shaft from the center axis of the driven shaft. In other words, the depth of the recessed portion containing the intake portion therein is increased, so that the intake portion may be contained more deeply in the recessed portion. Therefore, the increase in the height of the balancing apparatus can be avoided or further reduced. Any of the fourteenth to seventeenth aspects can also be applied to any of the first to eleventh aspects.
    [0061]
    [0062] Brief description of the drawings
    [0063]
    [0064] Figure 1 is a perspective view of a balancing apparatus according to a first embodiment.
    [0065] Figure 2 is a bottom view of the balancing apparatus according to the first embodiment.
    [0066] Figure 3 is a right side view of the balancing apparatus according to the first embodiment.
    [0067] Figure 4 is a front view of the balancing apparatus according to the first embodiment.
    [0068] Figure 5 is a rear view of the balancing apparatus according to the first embodiment.
    [0069] Figure 6 is a cross-sectional view of the balancing apparatus taken along a line S6-S6 illustrated in Figure 3.
    [0070] Figure 7 is a perspective view of a balancing apparatus according to a second embodiment.
    [0071] Figure 8 is a perspective view of the balancing apparatus according to the second embodiment, and illustrates the balancing apparatus with an oil pump removed therefrom. Figure 9 is a bottom view of the balancing apparatus according to the second embodiment.
    [0072] Figure 10 is a bottom view of the balancing apparatus according to the second embodiment, and illustrates the balancing apparatus with the oil pump removed therefrom.
    [0073] Figure 11 is a perspective view of the balancing apparatus according to the second embodiment from which the oil pump is removed.
    [0074] Figure 12 is a cross-sectional view of the balancing apparatus according to the second embodiment corresponding to Figure 6.
    [0075]
    [0076] Description of the realizations
    [0077]
    [0078] [First performance]
    [0079]
    [0080] A first embodiment of the present invention will be described. Figure 1 is a perspective view of a balancing apparatus 1 according to the first embodiment. Figure 2 is a bottom view of the balancing apparatus 1. Figure 3 is a right side view of the balancing apparatus 1. Figure 4 is a front view of the balancing apparatus 1. Figure 5 is a rear view of the balancing apparatus 1. Figure 6 is a cross-sectional view taken along a line S6-S6 illustrated in Figure 3. In the present disclosure, an "upper side" is defined as a vertically superior side in a state in which the balancing apparatus 1 is mounted on a veticle (a state mounted on a veticle), and a "lower side" is defined as a vertically lower side in the state mounted on the veticle.
    [0081]
    [0082] The balancing apparatus 1 is contained in an oil pan (not shown) attached to a lower portion of a cylinder block (not shown) of an engine. The motor is, for example, a four-cylinder line oscillating motor. As illustrated in Figure 1, balancer apparatus 1 includes balancer shafts 2 and 3 and balancer housing 4. The balancer shaft 2 will also be referred to as drive shaft 2, and the balancer shaft 3 will also be referred to as the driven shaft 3. The drive shaft 2 and the driven shaft 3 are contained within the balancer housing 4. The balancer shafts 2 and 3 are arranged in such a way that the longitudinal directions (directions of the axis of rotation) thereof extend parallel to one another along a front-rear direction of the motor and are generally arranged symmetrically therein. horizontal plane with respect to a vertical surface passing through an axis of rotation of a cranial (not illustrated) in the state mounted on the veticle.
    [0083]
    [0084] In the following description, an X axis, a Y axis and a Z axis are set, respectively, in the front-rear direction, in a vertical direction and in a left-right direction of the engine. In addition, the present realization will be described, assuming that the positive direction of the X axis, the positive direction of the Y axis, and the positive direction of the Z axis are, respectively, the direction extending from a front side to a rear side of the engine , the direction extending from a lower side to an upper side of the engine (a direction vertically upwards), and the direction extending from a right side to a left side seen from the front side of the engine.
    [0085]
    [0086] Each of the balancer shafts 2 and 3 includes an axis (a pivot axis) extending in the direction of the X axis. The balancer shafts 2 and 3 each include a generally semi-cylindrical balancer weight ( not shown), which has a center of gravity displaced from the shaft of the balancer tree 2 or 3 as seen in the X-axis direction. Both balancer weights are constantly located at the same heights with each other during turns of the trees 2 and 3 of balancer. A pair of interlocking gears 2a and 3a, meshed with each other, are respectively provided at the ends of the balancer shafts 2 and 3 in the positive direction of the X axis. In addition, reference holes 2b and 2b are respectively formed. 3b at the ends of the balancer shafts 2 and 3 in the positive direction of the X axis. A positioning peg (not shown) is mounted in each of the reference holes 2b and 3b when the balancing apparatus 1 is fixed to the block of cylinders. A driven gear 2c meshed with a drive gear (not shown) attached to the crankshaft is fixed around one end of the drive shaft 2 in the negative direction of the X axis (see Figure 4). Due to this configuration, balancer shafts 2 and 3 rotate in synchronization with the crankshaft. In the present embodiment, a speed ratio between the drive gear and the driven gear 2c is 2, and the balancer shafts 2 and 3 rotate at a speed twice as high as the crankshaft.
    [0087]
    [0088] The balancer housing 4 includes an upper housing 5 and a lower housing 6 formed separately from the upper housing 5. The upper housing 5 and the lower housing 6 (hereinafter also referred to as balancing housings 5 and 6) are formed to have shapes generally half divided, vertically divided into two members, and are in abutting connection with each other by coupling surfaces 5a and 6a extending in parallel with the axis X. The balancer housings 5 and 6 are fixed in the direction of the Y axis , by the use of six housing holding bolts 7.
    [0089]
    [0090] The bearings (not shown), which rotatably support the balancer shaft 2 or 3, they are provided on both sides with a portion containing weight (not shown) in the direction of the X axis within the balancer housings 5 and 6. The portion containing weight contains, inside, each of the balancer weights of trees 2 and 3 balancer. The support portions 8 and 9, which contain these bearings, are formed in the lower housing 6. The bearing support portions 8 and 9 are formed with a great thickness in comparison with other portions of the lower housing 6, thus having great rigidity The bearing support portion 8 is located on one side of the negative direction on the X axis of the weight of the balancer, and the bearing support portion 9 is located on one side of the positive direction of the X axis of the weight of the balancer. A lower surface (a surface on a negative direction side of the Y axis) of each of the bearing support portions 8 and 9 has a predetermined width in the direction of the X axis and extends in the direction of the Z axis. Three of the six holding bolts 7 of the housing are arranged outside the balancer shafts 2 and 3 and between the balancer shafts 2 and 3, and aligned in the direction of the Z axis, in the bearing support portion 8. three remaining pins 7 are arranged outside the balancer shafts 2 and 3 and between the balancer shafts 2 and 3, and aligned in the direction of the Z axis, in the bearing support portion 9.
    [0091]
    [0092] Four leg portions 10, which extend in the positive direction of the Y axis, are provided in the four corners of the upper housing 5 in the direction of the X axis and the direction of the Z axis. A hollow positioning pin 10a protrudes upwards in one end of each of the leg portions 10 in the positive direction of the Y axis. The hollow positioning pin 10a is press fit into the leg portion 10. A balancing clamp bolt (not shown) is inserted into each of the leg portions 10 and the hollow positioning pin 10a. The balancer clamping bolt is used to hold the balancer housing 4 to the cylinder block from the negative direction side of the Y axis.
    [0093]
    [0094] An oil pump 12 engages with one end of the driven shaft 3 in the negative direction of the X axis through a speed reduction mechanism 11 as illustrated in Figure 6. The speed reduction mechanism 11 includes a gear of drive 11a and a driven gear 11 b. The drive gear 11a is fixed to the end of the driven shaft 3 in the negative direction of the X axis. The driven gear 11b is fixed to a drive shaft 12a (see Figure 4) of the oil pump 12. Due to this configuration, the oil pump 12 is driven in rotation in synchronization with balancer shafts 2 and 3. The driven gear 11b has a greater number of teeth than the drive gear 11a, and the ratio of speed between the drive gear 11a and the driven gear 11b is 1/2. Therefore, the oil pump 12 rotates at half the speed of balancer shafts 2 and 3. A center of rotation of the drive shaft of the oil pump 12 is located on one side of the positive direction of the Z axis and on the side of the negative direction of the Y axis with respect to a center of rotation of the driven shaft 3.
    [0095]
    [0096] The oil pump 12 pressurizes the oil introduced from an oil filter 13 and discharges this oil to a main oil galena (not shown). The oil discharged in the main oil galena is mainly transmitted to each sliding portion of the engine and is provided for lubrication. In addition, a part of the oil is provided for the lubrication of balancer shafts 2 and 3. In the present embodiment, the oil pump 12 is a variable displacement oil pump capable of varying the volume of a pump chamber (i.e., a discharge volume). The variable displacement oil pump is a vane pump that has a mechanism that reduces the amount of change in the volume of the pump chamber at the time of high pump rotation. Any known pump (for example, a pump disclosed in the Public Disclosure of Japanese Patent Application No. 2.011-111926) can be used as a variable displacement oil pump.
    [0097]
    [0098] The oil pump 12 includes a housing 14 of the oil pump. The housing 14 of the oil pump includes a pump body 15 and a pump cover 16. The body of the pump 15 and the pump cover 16 are in contact with each other on coupling surfaces thereof extending in parallel with a YZ plane. The pump housing 14 and the pump body 15 are assembled with the use of three pump fastening bolts 17a. The oil pump 12 and the balancer housing 4 are clamped together from the negative direction side of the X axis with four pump fastening bolts 17b. As illustrated in Figure 4, each of the pump fastening bolts 17a and 17b is disposed along an outer periphery of the housing 14 of the oil pump as seen in the direction of the X axis. of bolts 14a and 14b is formed at the outer periphery of the housing 14 of the oil pump. Each of the plurality of bolts 14a includes a screw hole, and each of the pump fastening bolts 17a is inserted into this screw hole. In addition, each of the plurality of bolts 14b includes a screw hole, and each of the pump fastening bolts 17b is inserted into this screw hole.
    [0099]
    [0100] The pump casing 16 includes a portion 18 of end admission thereof in the negative direction of the Y axis. The intake portion 18 includes an opening portion 18d for introducing the oil into the oil pump 12. The opening portion 18d opens towards the positive direction of the X axis. One end of the oil filter 13 is connected to this opening portion 18d. The oil filter 13 extends to the bearing support portion 9 in the positive direction of the X axis. The other end (a distal end portion 13a) of the oil filter 13 is bent 90 degrees towards the negative direction side of the Y axis in the bearing support portion 9, and opens downwards (in the negative direction of the Y axis). The intake portion 18 and the oil filter 13 are disposed between the adjacent housing retaining bolts 7 in the direction of the Z axis. Therefore, the oil filter 13 and the housing holding bolts 7 are prevented from interfering with each other. each other in the direction of the Y axis. Therefore, the oil filter 13 can be arranged on the side of the positive direction of the Y axis with respect to the head portions of the holding bolts 7 of the housing. As a result, a dimension of the balancing apparatus 1 can be reduced in the direction of the Y axis, and the apparatus can have a compact size. Further, according to the balancing apparatus 1, the intake portion 18 is generally disposed the same position as the driven shaft 3 in the direction of the Z axis. In other words, the intake portion 18 is not disposed on a side where the drive shaft 2 is located but is located on the other side where the driven shaft 3 is located. Therefore, the intake portion 18 is prevented from interfering with a driven gear chamber containing the driven gear 2c in its interior, unlike when the intake portion 18 is disposed on a side where the drive shaft 2 is located. Therefore, the intake portion 18 can be arranged in such a manner that the intake portion 18 and the driven gear chamber partially overlap each other in the direction of the Y axis. As a result, since the intake portion 18 and the driven gear chamber can be arranged to overlap each other, the dimension of the balancing apparatus 1 in the direction of the Y axis can be reduced and the apparatus can have a compact size. In addition, the intake portion 18 and the oil filter 13 are provided in order to be contained entirely in an area on which the oil pump housing 14 projects as seen in the X-axis direction. both, the balancing apparatus 1 can have a compact size. As illustrated in Figure 6, two bolts 18c having bolt holes 18b are provided at a distal end of the intake portion 18. By inserting the filter holding bolts 19 into these screw holes 18b from the positive direction side of the X axis, the oil filter 13 is attached to the intake portion 18. An imaginary line L1 connecting the centers of the two screw holes 18b is provided obliquely with respect to a surface of each of the bearing support portions 8 and 9 of the balancer housing 4, ie a plane XZ Therefore, a dimension of the intake portion 18 can be reduced in the direction of the Z axis, and the apparatus can have a compact size.
    [0101]
    [0102] An intake duct 18a extending in the direction of the X axis is formed within the intake portion 18. The intake duct 18a is in communication with a pump chamber (not shown) of the oil pump 12 on one end side thereof and with the oil filter 13 on the other end side thereof. Due to this configuration, when the oil pump 12 is operated, the oil introduced from the oil sump in the oil filter 13 is supplied to the pump chamber through the intake duct 18a.
    [0103]
    [0104] As illustrated in Figure 6, the lower housing 6 includes a first bolt 20a and a second bolt 20b at one end thereof in the negative direction of the X axis. Both of the first bolt 20a and the second bolt 20b protrude downwards. The first bolt 20a and the second bolt 20b protrude at a set height within a range such that the first bolt 20a and the second bolt 20b do not protrude downwardly beyond the housing 14 of the oil pump. In addition, the first bolt 20a and the second bolt 20b are arranged so as to be spaced from one another in the direction of the Z axis. As a result, a recessed portion 24 is formed between the first bolt 20a and the second bolt 20b. A first screw hole 21a is formed on a distal end side of the first bolt 20a. A second screw hole 21b is formed on a distal end side of the second bolt 20b.
    [0105]
    [0106] The lower housing 6 further includes a third bolt 20c and a fourth bolt 20d. The third bolt 20c and the fourth bolt 20d are arranged on an upper side (the side of the positive direction of the Y axis) with respect to the first bolt 20a and the second bolt 20b. Further, the third bolt 20c is provided on the same side as the first bolt 20a, and the fourth bolt 20d is provided on the same side as the second bolt 20b, in the direction of the Z axis (a direction in which the trees 2 and 3 of balancer are aligned). In other words, the third bolt 20c is disposed in a position closer to the first bolt 20a than to the second bolt 20b, and the fourth bolt 20d is disposed in a position closer to the second bolt 20b than to the first bolt 20a, in one direction horizontal orthogonal to the axial direction of trees 2 and 3 of the balancer. In the present embodiment, the third bolt 20c is disposed on the same side as the first bolt 20a, and the fourth bolt 20d is disposed on the side of the negative direction of the Z axis with respect to the second bolt 20b, in the direction of the axis Z. A third screw hole 21c is formed in the third bolt 20c, and a fourth screw hole 21d is formed in the fourth bolt 20d. In the present embodiment, the third bolt 20c it is formed to protrude upwards beyond the mating surfaces 5a and 6a of the upper housing 5 and the lower housing 6. As a result, the third screw hole 21c is also formed on an upper side with respect to the mating surfaces 5a and 6a. The screw holes 21a to 21d are arranged in positions corresponding to the bolts 14a of the housing 14 of the oil pump. Therefore, the oil pump 12 is fixed to the lower housing 6 by inserting the fastening bolts 17b of the pump into the bolt holes of the bolts 14a and the bolt holes 21a to 21d from the direction side negative of the X axis
    [0107]
    [0108] With the oil pump 12 attached to the lower housing 6, the intake portion 18 is disposed at least partially in the recessed portion 24 formed between the first bolt 20a and the second bolt 20b. In the present embodiment, as illustrated in Figure 6, half or more of the admission portion 18 is disposed on an upper side with respect to an imaginary line L2 connecting a center of the screw hole 21a and the screw hole. 21b in a cross section orthogonal to the X axis (i.e., a transverse section in parallel with the YZ plane).
    [0109]
    [0110] As illustrated in Figure 2, the first bolt 20a is reinforced by a reinforcing rib 22a extending from the lower housing 6. More specifically, the first bolt 20a and the bearing support portion 8 are connected to each other through of the reinforcing rib 22a extending in the direction of the X axis. Although not illustrated in Figure 2, the third bolt 20c is also reinforced by a reinforcing rib 22b extending from the lower housing 6. In addition, the second bolt 20b and the fourth bolt 20d, and the bearing support portion 8 are connected to each other through a reinforcing rib 23 formed in a generally Y-shape as seen from the direction of the Y-axis. Reinforcing rib 23 is provided to cover the chamber of the driven gear (not shown) that contains inside it the driven gear 2c in the balancer housing 4. The drive gear chamber is formed with a thinner thickness than the other portions, and therefore may have an improved strength due to this configuration.
    [0111]
    [0112] In the balancer apparatus 1 described above, when the motor is activated and the crankshaft is rotationally driven, the balancer shaft 2 rotates at twice the speed of the crankshaft. The driven shaft 3 rotates in an opposite direction to that of the drive shaft 2 at the same speed as the drive shaft 2 through the transmission of a turning force due to the meshing engagement between the drive gears. interlock 2a and 3a. In this operation, the balancer weights of balancer shafts 2 and 3 also rotate in opposite directions to each other, and cancel the left and right centrifugal forces of balancer shafts 2 and 3. In this way, both balancer weights rotate according to the turns of balancer shafts 2 and 3 to transmit a vibratory force to the motor, whereby a secondary vibration of the motor is avoided or reduced.
    [0113]
    [0114] According to the balancing apparatus 1 described above, the balancer housing 4 and the housing 14 of the oil pump are different members. Therefore, the balancing apparatus 1 can be designed very flexibly. Furthermore, the first bolt 20a and the second bolt 20b protrude downwards, so that a large width can be set as a width on which the bolts 20a to 20d are arranged in the vertical direction (ie, a width between the positions). in which the oil pump 12 is supported). Therefore, the oil pump 12 can be supported with improved rigidity. In addition, the intake portion 18 of the oil pump 12 is disposed at least partially in the recessed portion 24 formed between the first bolt 20a and the second bolt 20b, which helps to prevent or reduce an increase in the height of the balancing apparatus 1 due to the downward projection of the first bolt 20a and the second bolt 20b. Especially in the present embodiment, half or more of the intake portion 18 is disposed on the upper side with respect to the imaginary line L2 connecting the center of the screw hole 21a of the first bolt 20a and the center of the screw hole 21b of the second bolt 20b in the cross section orthogonal to the axis X. Therefore, the increase in the height of the balancing apparatus 1 can be effectively avoided or reduced.
    [0115]
    [0116] Further, according to the balancing apparatus 1, the opening portion 18d of the intake portion 18 opens to the opposite side of the first bolt 20a and the second bolt 20b in the direction of the X axis. Therefore, it can be avoided or The increase in the height of the balancing apparatus 1 is also reduced. Furthermore, the balancing apparatus 1 includes the oil filter 13 which extends in the direction of the X axis. The oil filter 13 includes a first end portion connected to the portion 18d of opening and a second end portion open downward (the distal end portion 13a). Therefore, as long as the increase in the height of the balancing apparatus 1 is avoided or reduced, the intake portion 18 and a desired position in the oil pan covering the lower side of the balancing apparatus 1 can be brought into communication with each other. For example, even when the oil is distributed disproportionately in the oil sump because the vehicle travels on an inclined road, the distal end portion 13a can be placed in a position that guarantees the introduction of the oil.
    [0117]
    [0118] Furthermore, according to the balancing apparatus 1, the third bolt 20c is formed so that it protrudes upwards beyond the coupling surfaces 5a and 6a between the upper housing 5 and the lower housing 6. Therefore, a further distance long can be ensured as the distance between the first bolt 20a and the third bolt 20c without an increase in the height of the balancing apparatus 1. Therefore, the oil pump 12 can be supported with an additionally improved stiffness. Instead of, or in addition to, the third bolt 20c, the fourth bolt 20d may be formed to protrude upwardly beyond the mating surfaces 5a and 6a between the upper housing 5 and the lower housing 6.
    [0119]
    [0120] Further, according to the balancing apparatus 1, the first bolt 20a and the third bolt 20c are reinforced by the reinforcing ribs 22a and 22b extending from the lower housing 6, respectively. Similarly, the second bolt 20b and the fourth bolt 20d are reinforced by the reinforcing rib 23 extending from the bottom of the housing 6. Therefore, the oil pump 12 can be supported with additionally improved stiffness. Especially in the present embodiment, the first bolt 20a, the second bolt 20b, and the fourth bolt 20d are connected to the bearing support portion 8 having a relatively high rigidity, so that the oil pump 12 can be supported with a stiffness further improved. In addition, the reinforcing rib 23 connects the second bolt 20b and the fourth bolt 20d, and the bearing support portion 8 therebetween, so that the oil pump 12 can be supported with an additionally improved rigidity. At least one of the bolts 20 a to 20 d can be reinforced by a reinforcing rib according to the arrangement of the bolts 20 a to 20 d. In addition, at least one of the first bolt 20a and the second bolt 20b and at least one of the third bolt 20c and the fourth bolt 20d, and the bearing support portion 8 can be connected together according to the arrangement of the bolts 20a at 20d.
    [0121]
    [0122] Further, according to the balancing apparatus 1, the balancer shafts include the drive shaft 2, to which the rotational force of the crankshaft is transmitted, and the driven shaft 3, which rotates in the opposite direction from the drive shaft 2. by the rotational force transmitted from the drive shaft 2. The drive gear is fixed to the driven shaft, and the driven gear 2c is fixed to the drive shaft 12a of the oil pump 12. Then, the turning force of the driven shaft 3 is transmitted to the oil pump 12 through the speed reduction mechanism 11. As a result, the dimensions of the balancing apparatus 1 in the Y axis direction, and the apparatus can have a compact size. In addition, the oil pump 12 can be operated at a relatively low speed, whereby the efficiency of the pump is improved, so that the fuel efficiency is improved. In addition, the occurrence of cavitation can also be avoided or reduced. Instead of the rotational force of the driven shaft 3, the rotational force of the drive shaft 2 can be transmitted to the oil pump 12.
    [0123]
    [0124] [Second realization]
    [0125]
    [0126] A second embodiment of the present invention will be described. In the following description, the components similar to the first embodiment will be identified with the same reference numbers as those of the first embodiment. In addition, the components corresponding to the components of the first embodiment are identified with reference numbers that have the same values as the first embodiment, in the last two digits. In the following description, the second embodiment will be described, focusing only on the differences with respect to the first embodiment. A balancing apparatus 101 according to the second embodiment includes an oil pump 112 in place of the oil pump 12. The balancing apparatus 101 has the same configuration as the balancing apparatus 1 in terms of features that are not specifically specified otherwise. Figure 7 is a perspective view of the balancing apparatus 101 according to the second embodiment. Figure 8 is a perspective view of the balancing apparatus 101, and illustrates the balancing apparatus 101 with the oil pump 112 removed therefrom. Figure 9 is a bottom view of the balancer apparatus 101. Figure 10 is a bottom view of the balancer apparatus 101, and illustrates the balancer apparatus 101 with the oil pump 112 removed therefrom. Figure 11 is a perspective view of the balancing apparatus 101 according to the second embodiment from which the oil pump 112 has been removed. Figure 12 is a cross-sectional view of balancer apparatus 101 corresponding to Figure 6.
    [0127]
    [0128] The oil pump 112 includes an intake portion 118. The intake portion 118 includes an opening portion 118d for introducing the oil into the oil pump 112. The opening portion 118d opens toward the negative direction of the Y axis (downward). The intake portion 118 includes a filter portion 113. The filter portion 113 extends linearly from the opening portion 118d downwardly only at a slight distance, and a distal end portion 13a thereof opens downwardly. The filter portion 113 is formed integrally with the intake portion 118. According to this configuration, the number of components can be reduced. In addition, the portion 113 of filter allows the oil to be easily introduced.
    [0129]
    [0130] In addition, as illustrated in Figure 12, a speed reduction mechanism 111 includes a drive gear 111a and a driven gear 111b. The recessed portion 24 formed between the first bolt 20a and the second bolt 20b is disposed just below the driven shaft 3. Furthermore, a center C1 of the shaft of the driven shaft 3 is disposed on an upper side with respect to a center C2 of the shaft of the shaft. driven gear 111b. According to this configuration, the depth of the recessed portion 24 can be increased by an amount corresponding to the upward displacement of the center C1 of the driven shaft tree 3 from the center C2 of the driven gear shaft 111b. In other words, the depth of the recessed portion 24 containing the intake portion 118 therein is increased, so that the intake portion 118 can be contained more deeply in the recessed portion 24. Therefore, the increase in the height of the balancing apparatus 101 can be avoided or reduced.
    [0131]
    [0132] Having described various embodiments of the present invention, the above described embodiments of the present invention are intended to provide only the understanding of the present invention, and are not intended to limit the present invention to the same. However, however, the present invention may be modified or improved without departing from the spirit of the present invention, and includes equivalents thereof. In addition, the individual components described in the claims and in the specification can be arbitrarily combined or omitted within a range that allows them to remain with the ability to achieve at least a portion of the objects described above or to produce at least one part of the advantageous effects described above. For example, the balancer housing 4 may include a first balancer housing and a second balancer housing formed separately from the first balancer housing and coupled with the first balancer housing, instead of the upper housing 5 and the lower housing 6. In this case, the first balancer housing and the second balancer housing can be divided in the direction orthogonal to the axial directions of balancer shafts 2 and 3. In other words, the balancer housing can be divided into a balancer housing on the front side and a rear balancer housing. Furthermore, in another embodiment, the oil pump 12 can be supported at three points or five or more points instead of being supported at the four points by the first bolts 20a to 20d according to the embodiments described above. For example, the oil pump 12 can be supported at three points by the bolts 20a to 20c.
    [0133] The present application claims priority to Japanese Patent Application n °. 2016-29431 filed on February 19, 2016. The complete description of Japanese Patent Application No. 2016-29431 filed on February 19, 2016 including the specification, the claims, the drawings and the summary are incorporated herein by reference. In its whole.
    [0134]
    [0135] List of reference signals
    [0136]
    [0137] 1, 101 balancing device
    [0138] 2 balancing shaft (drive shaft)
    [0139] 2c driven gear
    [0140] 3 balancing shaft (powered shaft)
    [0141] 2nd, 3rd interlocking gear
    [0142] 2b, 3b reference hole
    [0143] 4 balancer housing
    [0144] 5 balancer housing (upper housing)
    [0145] 6 balancer housing (lower housing)
    [0146] 5a, 6a mating surface
    [0147] 7 pin for fixing the housing
    [0148] 8, 9 bearing support portion
    [0149] 10 leg portion
    [0150] 10th hollow pin
    [0151] 11, 111 speed reduction mechanism
    [0152] 11a, 111a drive gear
    [0153] 11b, 111b gear driven
    [0154] 12, 112 oil pump
    [0155] 12th drive shaft
    [0156] 13 oil filter
    [0157] 13th distal end portion
    [0158] 14 oil pump housing
    [0159] 14a, 14b bullet
    [0160] 15 pump body
    [0161] 16 pump cover
    [0162] 17th pump fastening bolt
    [0163] 17b pump fastening bolt
    [0164] 18, 118 intake portion 18a intake duct 18b hole for thyme
    [0165] 18c bolt
    [0166] 18d, 118d opening portion
    [0167] 19 pin of the filter 20a first pin
    [0168] 20b second bulon
    [0169] 20c third bulon
    [0170] 20d quarter bulon
    [0171] 21a, 21b, 21c, 21d hole for screw 22a, 22b, 23 reinforcement rib 24 portion lowered
    [0172] 113 portion of filter
    [0173] L1 imaginary line
    [0174] C1, C2 center of the tree
    权利要求:
    Claims (17)
    [1]
    1. A balancing apparatus comprising:
    a balancer shaft configured to rotationally drive;
    a balancer housing that rotatably contains the balancer shaft therein; Y
    an oil pump including an oil pump housing formed separately from the balancer housing, the oil pump being attached to the balancer housing,
    wherein the balancer housing includes a top housing and a bottom housing formed separately from the upper housing,
    wherein the lower housing includes:
    a first bolt and a second bolt configured to hold the oil pump to the lower housing, and protruding down an end side of an axial direction of the balancer shaft; Y
    a third bolt configured to hold the oil pump to the lower housing, and disposed on an upper side with respect to the first bolt and the second bolt,
    wherein the first bolt and the second bolt are arranged to be separated from each other in an orthogonal direction to the axial direction such that a lowered portion is formed therebetween,
    wherein the oil pump includes an intake portion having an opening portion for introducing oil into the oil pump, and
    wherein the intake portion is disposed at least partially in the recessed portion.
    [2]
    The balancing apparatus according to claim 1, wherein the lower housing includes a fourth bolt configured to hold the oil pump to the lower housing, and disposed on the upper side with respect to the first bolt and the second bolt.
    [3]
    The balancing apparatus according to claim 1, wherein the first bolt includes a first screw hole in a distal end side thereof.
    wherein the second bolt includes a second screw hole in a distal end side thereof, and
    wherein half or more of the intake portion is disposed on an upper side with respect to an imaginary line connecting a center of the first screw hole and a center of the second screw hole in a cross section orthogonal to the axial direction .
    [4]
    The balancing apparatus according to claim 1, wherein the opening portion opens to an opposite end side in the axial direction.
    [5]
    5. Balancing apparatus according to claim 4, further comprising a filter extending in the axial direction, and including a first end portion connected to the opening portion and a second open end portion facing down.
    [6]
    6. The balancing apparatus according to claim 1, wherein the opening portion opens downwardly.
    [7]
    7. The balancing apparatus according to claim 6, wherein the intake portion includes a filter portion extending from the opening portion downward, and
    wherein the filter portion is formed integrally with the intake portion.
    [8]
    The balancing apparatus according to claim 2, wherein at least one of the third bolt and the fourth bolt is formed to protrude upwardly beyond the mating surfaces between the upper housing and the lower housing.
    [9]
    The balancing apparatus according to claim 2, wherein at least one of the first to fourth bolts is reinforced by a reinforcing rib extending from the lower housing.
    [10]
    The balancing apparatus according to claim 9, wherein the lower housing includes a bearing support portion that partially contains a bearing configured to rotatably support the balancer shaft, and
    wherein the reinforcing rib is connected to the bearing support portion.
    [11]
    The balancing apparatus according to claim 10, wherein the reinforcing rib connects together at least one of the first bolt and the second bolt and at least one between the third bolt and the fourth bolt, and the portion of bearing support.
    [12]
    The balancing apparatus according to claim 1, wherein the balancer shaft includes a drive shaft to which is transmitted a rotational force of a crankshaft of a motor, and a driven shaft configured to rotate in an opposite direction to the drive shaft by means of a rotational force transmitted from the shaft drive, and
    wherein the rotational force is transmitted to the oil pump by the drive shaft or the driven shaft.
    [13]
    13. A balancing apparatus comprising:
    a balancer shaft configured to rotationally drive;
    a balancer housing that rotatably contains the balancer shaft therein, and includes a first balancer housing and a second balancer housing formed separately from the first balancer housing and coupled with the first balancer housing; Y
    an oil pump including an oil pump housing formed separately from the balancer housing, the oil pump being attached to the first balancer housing,
    wherein the balancer housing includes:
    a first bolt and a second bolt configured to hold the oil pump to the first balancer housing, and protruding down an end side of an axial direction of the balancer shaft; Y
    a third bolt configured to hold the oil pump to the first balancer housing, and disposed on an upper side with respect to the first bolt and the second bolt,
    wherein the first bolt and the second bolt are arranged to be separated from each other in an orthogonal direction to the axial direction such that a lowered portion is formed therebetween,
    wherein the oil pump includes an intake portion having an opening portion for introducing oil into the oil pump, and
    wherein the intake portion is disposed at least partially in the recessed portion.
    [14]
    14. The balancing apparatus according to claim 13, wherein the first bolt includes a first screw hole on a distal end side thereof,
    wherein the second bolt includes a second screw hole in a distal end side thereof, and
    wherein half or more of the intake portion is disposed on an upper side with respect to an imaginary line connecting a center of the first screw hole and a center of the second screw hole in a cross section orthogonal to the axial direction .
    [15]
    15. The balancing apparatus according to claim 13, wherein the balancing apparatus includes a speed reduction mechanism,
    wherein the oil pump is a variable displacement oil pump capable of varying a volume of discharge thereof, and
    wherein a turning force of the balancer shaft is transmitted to the oil pump through the speed reduction mechanism.
    [16]
    The balancing apparatus according to claim 15, wherein the balancing shaft includes a drive shaft to which is transmitted a turning force of a crankshaft of a motor, and a driven shaft configured to rotate in an opposite direction to the drive shaft by a turning force transmitted from the drive shaft,
    wherein the speed reduction mechanism includes a drive gear and a driven gear having a greater number of teeth than the drive gear,
    wherein the drive gear is fixed to the driven shaft, and
    wherein the driven gear is fixed to a drive shaft of the oil pump.
    [17]
    17. The balancing apparatus according to claim 16, wherein the recessed portion is disposed just below the driven shaft, and
    wherein the center of the axis of the driven shaft is disposed on an upper side with respect to the center of the axis of the driven gear.
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    同族专利:
    公开号 | 公开日
    CN109073039A|2018-12-21|
    MX2018009911A|2018-09-11|
    ES2695473B2|2019-07-29|
    US20200332856A1|2020-10-22|
    ES2695473R1|2019-01-25|
    JPWO2017141917A1|2018-10-11|
    CN109073039B|2020-05-22|
    WO2017141917A1|2017-08-24|
    JP6497569B2|2019-04-10|
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    法律状态:
    2019-01-04| BA2A| Patent application published|Ref document number: 2695473 Country of ref document: ES Kind code of ref document: A2 Effective date: 20190104 |
    2019-01-25| EC2A| Search report published|Ref document number: 2695473 Country of ref document: ES Kind code of ref document: R1 Effective date: 20190118 |
    2019-07-29| FG2A| Definitive protection|Ref document number: 2695473 Country of ref document: ES Kind code of ref document: B2 Effective date: 20190729 |
    2021-12-27| PC2A| Transfer of patent|Owner name: HITACHI ASTEMO, LTD. Effective date: 20211227 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2016029431|2016-02-19|
    PCT/JP2017/005368|WO2017141917A1|2016-02-19|2017-02-14|Balancer device|
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