Assembly

Abstract

The layout of the assembly can be improved. The assembly has a housing that houses oil, a rotating electric machine, a first gear connected downstream of the rotating electric machine, a second gear engaged with the first gear, a third gear connected downstream of the second gear, a fourth gear engaged with the third gear, a fifth gear connected downstream of the fourth gear, and a sixth gear engaged with the fifth gear. The rotating electric machine and the first gear are disposed on the first shaft. The second gear and the third gear are disposed on the second shaft. The fourth gear and the fifth gear are arranged on the third shaft. The sixth gear is disposed on the fourth shaft. The first shaft and the fourth shaft are disposed below the second shaft and the third shaft when viewed in the axial direction.

Description

Technical Field

[0001] The invention relates to an assembly. Background Art

[0002] Patent Document 1 discloses a vehicle drive device including a counter gear mechanism for reducing speed. The vehicle drive device transmits output torque of a rotary electric machine to a pair of wheels via a pair of output members to drive the vehicle.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2021 / 131204

[0006] Problems to be solved by the invention

[0007] The rotating electric machine can be used in combination with a speed reduction mechanism and a power transmission mechanism such as a differential gear. However, if the rotating electric machine and the power transmission mechanism are not assembled into a module but are provided separately, an effective layout cannot be achieved, and as a result, the overall size may become larger. Therefore, a module with high layout performance is desired. Summary of the invention

[0008] The present invention has been made in view of such problems, and an object of the present invention is to improve the layout properties of components.

[0009] A component of one embodiment of the present invention has a housing that contains: oil, a rotating electric machine, a first gear connected to the downstream of the rotating electric machine, a second gear meshing with the first gear, a third gear connected to the downstream of the second gear, a fourth gear meshing with the third gear, a fifth gear connected to the downstream of the fourth gear, and a sixth gear meshing with the fifth gear. The rotating electric machine and the first gear are arranged on a first shaft. The second gear and the third gear are arranged on a second shaft. The fourth gear and the fifth gear are arranged on a third shaft. The sixth gear is arranged on a fourth shaft. In axial view, the first shaft and the fourth shaft are arranged below the second shaft and the third shaft.

[0010] Effects of the Invention

[0011] According to this method, by increasing the gear stage, the diameter of each gear can be reduced when achieving a specified speed ratio. As a result, the main cause of layout constraints caused by overly large gears can be alleviated. Therefore, the layout of the components can be improved. In addition, by making the layout concentrate the first shaft and the fourth shaft on the lower side of the gravity direction, it is easy to guide the oil scattered by the rotation of the sixth gear as the gear on the downstream side to the rotating motor side. Therefore, it becomes a layout that can perform appropriate oil lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of the components of this embodiment.

[0013] Figure 2 This is the appearance of the component.

[0014] Figure 3 This is a diagram showing the appearance of the assembly with the second cover removed.

[0015] Figure 4 This is a diagram of the assembly viewed from the speed reduction mechanism side with the second cover removed. DETAILED DESCRIPTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0017] Figure 1 It is a schematic structural diagram of the component 100 of this embodiment. Figure 2 is an appearance diagram of component 100. Figure 3 FIG. 1 is a diagram showing the appearance of the assembly 100 in a state where the second cover 12 is removed. Figure 4 FIG. 1 is a diagram showing the assembly 100 from the speed reduction mechanism 30 side with the second cover 12 removed. Figure 1 In the figure, the direction perpendicular to the paper plane corresponds to the direction of gravity. Figures 2 to 4 In each of the figures, the up and down direction corresponds to the direction of gravity.

[0018] Regarding the component, the component may also be referred to as, for example, a motor component (a component having at least a motor), a power transmission device (a device having at least a power transmission mechanism). The motor is a rotating electrical machine having a motor function and / or a generator function (at least one of the motor function and the generator function). The power transmission mechanism is, for example, a gear mechanism and / or a differential gear mechanism. A device (component) having a motor and a power transmission mechanism is included in the concepts of both the motor component and the power transmission device.

[0019] like Figure 1 As shown, the assembly 100 includes: a housing 10, a rotating electric machine 20, a speed reduction mechanism 30, and a differential gear 40. The assembly 100 is mounted on a vehicle, which is an electric vehicle. The housing 10 has a first cover 11, a second cover 12, and a housing 13. The rotating electric machine 20, the speed reduction mechanism 30, and the differential gear 40 are accommodated in the housing 10. The first cover 11 extends from one side in the axial direction ( Figure 1 The left side of the housing 13 blocks the opening of the cylindrical housing 13, and the second cover 12 blocks the opening of the housing 13 from the other axial side. The rotating electrical machine 20 is accommodated in the housing 13, and the differential gear 40 is accommodated in the second cover 12.

[0020] like Figures 2 to 4As shown, the component 100 also has an inverter 70. The inverter 70 is disposed on the outer wall of the housing 13. The inverter 70 may also be disposed in the housing 13. The inverter 70 is disposed close to the rotating motor 20. The inverter 70 is disposed above the rotating motor 20. Above and below refer to configurations that appear to overlap in the direction of gravity, for example, in a specified direction view including axial observation and radial observation. For example, in a case where the first element overlaps with the second element in the direction of gravity in axial observation, if the position of the first element is higher than the second element, the first element is located above the second element. In this case, in radial observation, the first element and the second element may overlap or may be offset.

[0021] The assembly 100 includes oil OL. The oil OL is supplied from the outside of the housing 10 to the rotating electric machine 20 in the case 13, for example, to lubricate the rotating electric machine 20. A portion of the oil OL supplied to the rotating electric machine 20 is stored in the housing 10 and is accommodated in the housing 10. The remaining oil OL is discharged to the outside of the housing 10. The oil OL can be circulated inside and outside the housing 10.

[0022] The housing 13 has a through hole 13a. The through hole 13a is formed in the portion of the housing 13 that is further down in the direction of gravity than the first axis AX1 and the fourth axis AX4, connecting the inside of the second cover 12 with the inside of the housing 13. Therefore, the oil OL in the housing 13 can flow into the second cover 12 through the through hole 13a, and is also used for lubrication of the differential gear 40. Oil reservoirs are respectively formed in the second cover 12 and the housing 13 at the lower side in the direction of gravity. The oil level LV of the oil reservoir overlaps with the through hole 13a in a stable circulation state, for example, when viewed in the axial direction, and thus, in a stable circulation state, becomes the same oil level height as the oil reservoir in the second housing 12 and the oil reservoir in the housing 13.

[0023] The stable circulation state is a state in which the circulation of the oil OL is stable. For example, when the oil is circulated using a pump, the oil level LV is stable during the operation of the pump. The oil circulation may also be performed by stirring up the oil OL by a rotating member such as a gear in the housing 10. In this case, the stable circulation state is a state in which the oil level LV is stable during the rotation of the rotating member.

[0024] The oil level LV is set to a height at which the stator 22 is immersed in the oil OL in a stable circulation state and the oil OL does not enter the gap (gap) between the rotor 21 and the stator 22. This is because if the oil OL enters the gap, the rotation resistance of the rotary electric machine 20 will increase sharply, and on the other hand, it is desired to cool the stator 22. Therefore, by setting the oil level LV as described above, it can be set so that the oil OL contacts the coil end of the stator 22.

[0025] return Figure 1The rotating electric machine 20 includes: a rotor 21, a stator 22 and a rotating shaft 23, which constitute a driving source of the vehicle. The rotor 21 is arranged on the outer periphery of the rotating shaft 23. The stator 22 is arranged on the housing 13, and accommodates the rotor 21. The rotating shaft 23 protrudes from the rotor 21 toward both sides in the axial direction. The rotating shaft 23 penetrates the first cover 11 at one end side in the axial direction, and penetrates the housing 13 at the other end side in the axial direction. A bearing 51 is provided on the first cover 11 at the portion through which the rotating shaft 23 penetrates, and a bearing 52 is provided on the housing 13 at the portion through which the rotating shaft 23 penetrates, and the rotating shaft 23 is supported by the bearing 51 and the bearing 52. A resolver 80 is provided on the portion of the rotating shaft 23 protruding from the first cover 11. The resolver 80 detects the rotation of the rotating electric machine 20.

[0026] The speed reduction mechanism 30 is a gear mechanism, and includes: a first gear 31, a second gear 32, a third gear 33, a fourth gear 34, a fifth gear 35, a sixth gear 36, a shaft 37, and a shaft 38. The first gear 31 is configured on the first axis AX1 together with the rotating motor 20. In other words, the rotating motor 20 and the first gear 31 are coaxially configured relative to the first axis AX1. That is, the situation where multiple elements (components, parts, etc.) are configured on the Nth axis (N is a natural number) is synonymous with the situation where multiple elements are coaxially configured relative to the Nth axis. Similarly, the second gear 32 and the third gear 33 are configured on the second axis AX2, and the fourth gear 34 and the fifth gear 35 are configured on the third axis AX3. The sixth gear 36 and the differential gear 40 are configured on the fourth axis.

[0027] The first axis AX1, the second axis AX2, the third axis AX3, and the fourth axis AX4 all constitute the axis of the component 100 and extend in the same direction. Therefore, the extension direction of the first axis AX1, the second axis AX2, the third axis AX3, and the fourth axis AX4 is equivalent to the axial direction of the component 100. That is, the axial direction refers to the axial direction of the rotating axis of the component (such as a motor, a gear mechanism, or a differential gear mechanism) constituting the component. The radial direction of the component 100 is a direction orthogonal to any one of the first axis AX1, the second axis AX2, the third axis AX3, and the fourth axis AX4. The first axis AX1 constitutes the axis of the rotating shaft 23, the second axis AX2 constitutes the axis of the shaft 37, the third axis AX3 constitutes the axis of the shaft 38, and the fourth axis AX4 constitutes the axis of the differential gear 40.

[0028] The first gear 31 is connected to the downstream of the rotating electric machine 20. The downstream is the power output side, and with respect to the rotating electric machine 20, the rotor 21 and the stator 22 that generate power are used as reference. Therefore, the downstream of the rotating electric machine 20 can also be referred to as the downstream of the stator 22. Alternatively, with respect to the positional relationship in power transmission, the rotating shaft 23 may not be a component (element) of the rotating electric machine 20. The downstream is the power output side, and the upstream is the power input side.

[0029] The first gear 31 is connected to the downstream of the rotating electric machine 20 so as to transmit power. The connection may also be via other structures (such as a clutch or other gear mechanisms). The first gear 31 is disposed on the rotating shaft 23 at the portion protruding from the housing 13 and axially further to the other side than the rotor 21. The first gear 31 is pressed into the rotating shaft 23 so as to be integrated with the first gear 31.

[0030] The second gear 32 meshes with the first gear 31. The number of teeth of the second gear 32 is set to be greater than that of the first gear 31, and together with the first gear 31, it constitutes a first reduction gear stage. The second gear 32 is provided on the shaft 37 and is arranged on the second shaft AX2. The second gear 32 is formed integrally with the shaft 37. The shaft 37 extends along the rotating shaft 23. The shaft 37 is supported by a bearing 53 provided on the housing 13 and a bearing 54 provided on the second cover 12. The bearing 53 and the bearing 54 are arranged at both ends relative to the shaft 37.

[0031] The third gear 33 is connected to the downstream of the second gear 32. The third gear 33 is provided on the shaft 37 and is arranged on the second axis AX2. The third gear 33 is provided on the shaft 37 in a portion extending in a direction farther from the rotary electric machine 20 than the second gear 32, that is, in the other axial direction. The third gear 33 is formed integrally with the shaft 37. The second gear 32 and the third gear 33 are arranged between the bearing 53 and the bearing 54 in the axial direction.

[0032] The fourth gear 34 meshes with the third gear 33. The number of teeth of the fourth gear 34 is set to be greater than that of the third gear 33, and together with the third gear 33, it constitutes a second reduction gear stage. The fourth gear 34 is provided on the shaft 38 and is arranged on the third shaft AX3. The fourth gear 34 is formed integrally with the shaft 38. The shaft 38 extends along the rotating shaft 23. The shaft 38 is supported by a bearing 55 provided on the housing 13 and a bearing 56 provided on the second cover 12. The bearing 55 and the bearing 56 are arranged at both ends relative to the shaft 38.

[0033] The fifth gear 35 is connected to the downstream of the fourth gear 34. The fifth gear 35 is provided on the shaft 38 and is arranged on the third shaft AX3. The fifth gear 35 is provided on the shaft 38 in a direction closer to the rotating electric machine 20 than the fourth gear 34, that is, on the portion of the shaft 38 extending to one axial side. Therefore, on the shaft 38, the power transmission direction is turned back to the axially opposite side relative to the shaft 37. The fifth gear 35 is formed integrally with the shaft 38. The fourth gear 34 and the fifth gear 35 are arranged between the bearing 55 and the bearing 56 in the axial direction.

[0034] The sixth gear 36 meshes with the fifth gear 35. The sixth gear 36 is a final gear and is provided on the differential gear 40. The sixth gear 36 is arranged on the fourth shaft AX4 together with the differential gear 40. The power from the rotary electric machine 20 is transmitted from the sixth gear 36 to the differential gear 40. Therefore, the differential gear 40 is connected to the downstream of the sixth gear 36.

[0035] The sixth gear 36 overlaps with the first gear 31 in radial observation. In other words, the first gear 31 has a portion that overlaps with the sixth gear 36 in radial observation. This portion overlaps with the sixth gear 36 in radial observation along a plane including the first axis AX1 and the fourth axis AX4, for example. Overlapping in a prescribed direction observation including radial observation and axial observation means overlapping in a prescribed direction, which means that a plurality of elements are arranged in a prescribed direction. Therefore, if a plurality of elements are illustrated in a drawing to be arranged in a prescribed direction, it can be regarded as an article in the specification that describes the overlapping of a plurality of elements in a prescribed direction observation.

[0036] When the sixth gear 36 overlaps the first gear 31 in radial view, as described above, the power transmission direction is reversed in the axial direction opposite to the shaft 37 at the shaft 38. Therefore, by overlapping the sixth gear 36 with the first gear 31 in radial view, the axial dimension can be reduced.

[0037] The sixth gear 36 has a larger number of teeth than the fifth gear 35, and together with the fifth gear 35, it forms a third reduction gear stage. Therefore, in the reduction mechanism 30, three-stage reduction is performed by the first gear 31 and the second gear 32, the third gear 33 and the fourth gear 34, and the fifth gear 35 and the sixth gear 36. Thus, while ensuring the reduction ratio, the reduction gear diameter can be reduced compared to the case where the reduction is one or even two stages. As a result, it is possible to alleviate the layout restriction that limits the compactness of the assembly 100 due to having to ensure the distance between the axes corresponding to the large reduction gear diameter.

[0038] That is, in the assembly 100, three gear stages can be formed by the four axes of the first axis AX1 to the fourth axis AX4, and the number of gear stages can be increased compared to the case of performing a one-stage speed change and a two-stage speed change. Moreover, by increasing the number of gear stages, the diameter of each gear can be reduced when achieving a predetermined speed ratio. As a result, the main cause of layout constraints caused by overly large gears can be alleviated. Therefore, the layout of the assembly 100 can be improved.

[0039] In the speed reduction mechanism 30, the third gear 33 and the fourth gear 34 are arranged in a direction farther from the stator 22 than the first gear 31, the second gear 32, the fifth gear 35, and the sixth gear 36. That is, the four gears of the first gear 31, the second gear 32, the fifth gear 35, and the sixth gear 36 are close to the stator 22 side, and the remaining two gears of the third gear 33 and the fourth gear 34 are close to the side away from the stator 22. As a result, a space is formed around the two gears, that is, on the end side of the assembly 100. Therefore, the end of the assembly 100 can be recessed and miniaturized, or components can be arranged in the space on the end side of the assembly 100, etc., and the degree of freedom of layout can be improved.

[0040] The differential gear 40 is a differential gear mechanism, and includes a differential case 41 and a differential portion 42. The differential case 41 is supported by a bearing 57 provided on the case 13 and a bearing 58 provided on the second cover 12, and rotates together with the sixth gear 36. The sixth gear 36 is coaxially fixed to the outer wall of the differential case 41, and the differential case 41 accommodates the differential portion 42. The differential portion 42 distributes the power input to the differential case 41 via the sixth gear 36 and outputs it to the drive wheels in the left and right directions of the vehicle.

[0041] The differential gear 40 protrudes in a direction away from the stator 22 relative to the sixth gear 36. The differential gear 40 protrudes in such a manner that a portion that protrudes further in the axial direction from the sixth gear 36 is used as a protruding portion. Therefore, the differential gear 40 protrudes in a direction farther away from the sixth gear 36 than in a direction approaching the stator 22, and is arranged in a direction farther away from the stator 22 relative to the sixth gear 36.

[0042] Thus, the differential gear 40 is arranged in the space on the end side of the assembly 100 formed by the gear arrangement of the speed reduction mechanism 30. Therefore, combined with the reduction in axial dimension achieved in the speed reduction mechanism 30 as described above and the reduction in gear diameter achieved by adopting three-stage speed reduction, the assembly 100 can be appropriately miniaturized. As a result, the layout of the assembly 100 is further improved.

[0043] The bearing 57 and the bearing 58 are arranged on both sides of the differential gear 40 in the axial direction. As a result, the bearing 53, the bearing 55 and the bearing 57 are concentrated on one side of the axial direction, and the bearing 54, the bearing 56 and the bearing 58 are concentrated on the other side of the axial direction with respect to the gears of the reduction mechanism 30 and the differential gear 40. Therefore, it is easy to ensure the rigidity of the housing 10, and it is advantageous in terms of acoustic vibration performance. In addition, since the bearing retaining holes can be concentratedly processed on one side of the axial direction and the other side of the axial direction, the cores of the three rotating parts of the shaft 37, the shaft 38 and the differential gear 40 are also easy to align. Furthermore, since the gears of the reduction mechanism 30 and the bearings 53 to 58 are concentrated on the other side of the axial direction with respect to the stator 22, it is easy to configure the resolver 80 from one side of the axial direction with respect to the rotating shaft 23, and the rotating electric machine 20 is also easy to assemble.

[0044] The first drive shaft 61 is mounted on the differential portion 42 from one axial side, and the second drive shaft 62 is mounted on the differential portion 42 from the other axial side. The power from the rotary electric machine 20 is transmitted from the differential portion 42 to the drive wheel on one side via the first drive shaft 61, and is transmitted to the drive wheel on the other side via the second drive shaft 62. The first drive shaft 61 is longer than the second drive shaft 62, thereby being able to obtain a distance between the drive wheel and the differential gear 40, thereby suppressing a folding angle. The first drive shaft 61 is supported by a bearing 59 provided on the first cover 11.

[0045] The sixth gear 36 may also be configured as a part of the differential gear 40. That is, the sixth gear 36 may also be provided as a component of the differential gear 40. Even in this case, the differential gear 40 may be connected to the downstream of the sixth gear 36 in a form in which a part of the differential gear 40 including the differential portion 42 that outputs the power from the rotary electric machine 20 is connected to the downstream of the sixth gear 36.

[0046] like Figure 3 , Figure 4 As shown, the first axis AX1 and the fourth axis AX4 are arranged on the lower side than the second axis AX2 and the third axis AX3 in axial observation. The upper side and the lower side refer to the upper and lower relationship in the gravity direction in the specified direction including axial observation and radial observation, including the upper side and the lower side. With respect to the upper side and the lower side, the upper side and the lower side also include the positional relationship of being obliquely upward and obliquely downward in the specified direction including axial observation and radial observation. Therefore, for example, when the first element is located obliquely above the second element in a state where it does not overlap with the second element in the gravity direction in the axial observation, and the first element does not overlap with the second element in the radial observation, the first element is located on the upper side of the second element.

[0047] As a result of the above configuration, the first axis AX1 and the fourth axis AX4 are concentrated on the lower side of the assembly 100 in the direction of gravity. As a result, the oil OL scattered by the rotation of the sixth gear 36 as the gear on the downstream side is easily guided to the rotating electric machine 20 side, and a layout that can achieve appropriate oil lubrication is obtained. The oil OL can be as follows Figure 4 As indicated by the middle arrow, the liquid is guided to the rotating electric machine 20 side through the through hole 13a.

[0048] In addition, since the rotating electric machine 20 disposed on the first axis AX1 is disposed on the lower side in the direction of gravity, a space can be provided above the rotating electric machine 20. Therefore, the inverter 70 can be disposed above the rotating electric machine 20 and close to the rotating electric machine 20 while suppressing the expansion of the radial dimension. As a result, compared with, for example, the rotating electric machine 20 is disposed on the upper side in the direction of gravity and the inverter 70 is disposed above it, the layout of the assembly 100 becomes compact and the layout property is also improved.

[0049] Furthermore, when the rotating electric machine 20 is arranged on the upper side in the direction of gravity and the inverter 70 as a strong electric component is arranged below it, leakage due to damage may also occur, but there is no such concern. For example, leakage due to damage may occur as a result of the inverter 70 being squeezed by a heavy object including the rotating electric machine 20 during a vehicle collision or when an impact load is applied to the inverter 70 when the vehicle hits the bottom.

[0050] As described above, in the assembly 100, the gear diameter is reduced by adopting three-stage reduction, and as a result, layout restrictions can be relaxed. Therefore, by configuring the rotating electrical machine 20 and the differential gear 40 separately, it is also easy to appropriately set the relative oil level of the oil reservoir relative to them.

[0051] In this case, the oil level can be set more appropriately by increasing the oil level of the oil reservoir in the second cover 12 relative to the differential gear 40 (thus, by lowering the position of the differential gear 40). In addition, for the rotary electric machine 20, in order to suppress the oil OL from entering the gap between the rotor 21 and the stator 22, the oil level can be set more appropriately by relatively decreasing the oil level of the oil reservoir in the housing 13 (thus, by raising the position of the rotary electric machine 20). From such a viewpoint, in the assembly 100, the first shaft AX1 is arranged on the upper side than the fourth shaft AX4.

[0052] Next, the main effects of this embodiment will be described.

[0053] (1) The assembly 100 has a housing that accommodates: the oil OL, the rotating electrical machine 20, the first gear 31 connected to the downstream of the rotating electrical machine 20, the second gear 32 meshing with the first gear 31, the third gear 33 connected to the downstream of the second gear 32, the fourth gear 34 meshing with the third gear 33, the fifth gear 35 connected to the downstream of the fourth gear 34, and the sixth gear 36 meshing with the fifth gear 35. The rotating electrical machine 20 and the first gear 31 are arranged on the first shaft AX1. The second gear 32 and the third gear 33 are arranged on the second shaft AX2. The fourth gear 34 and the fifth gear 35 are arranged on the third shaft AX3. The sixth gear 36 is arranged on the fourth shaft AX4. In axial view, the first shaft AX1 and the fourth shaft AX4 are arranged on the lower side of the second shaft AX2 and the third shaft AX3.

[0054] According to such a configuration, by increasing the gear stage, the diameter of each gear can be reduced when achieving a predetermined speed ratio. As a result, the main cause of layout constraints caused by excessively large gears can be alleviated. Therefore, the layout of the assembly 100 can be improved. In addition, by adopting a layout in which the first axis AX1 and the fourth axis AX4 are concentrated on the lower side in the direction of gravity, as described above, it is easy to guide the oil OL scattered due to the rotation of the sixth gear 36, which is the gear on the downstream side, to the rotating electric machine 20 side. Therefore, a layout capable of proper oil lubrication is achieved.

[0055] In this case, the layout of the assembly 100 can be improved by making it compact as described above. In this case, there is no need to worry about leakage due to damage to the inverter 70, and the relative oil level of the oil reservoir with respect to the rotating electrical machine 20 and the differential gear 40 can be easily and appropriately set.

[0056] (2) In the assembly 100, the first gear 31 has a portion overlapping the sixth gear 36 when viewed in the radial direction. This configuration can reduce the axial dimension compared to a case where the differential gear 40 is axially reversely arranged relative to the third gear 33 and the fourth gear 34, thus contributing to reducing the axial dimension.

[0057] (3) In the assembly 100, the third gear 33 and the fourth gear 34 are arranged in a direction farther from the stator 22 than the first gear 31, the second gear 32, the fifth gear 35, and the sixth gear 36. As a result, a space can be formed around the third gear 33 and the fourth gear 34, that is, at the end side of the assembly 100. Therefore, the end side of the assembly 100 can be recessed and miniaturized, or other components can be arranged in the space at the end side of the assembly 100, and the degree of freedom of layout can be improved.

[0058] (4) The assembly 100 has a differential gear 40 connected to the downstream of the sixth gear 36. The differential gear 40 is arranged on the fourth axis AX4. The differential gear 40 protrudes in a direction away from the stator 22 relative to the sixth gear 36. According to such a structure, since the differential gear 40 is arranged in the space on the end side of the assembly 100, the assembly 100 can be appropriately made compact, and the degree of freedom of layout can be further improved.

[0059] Although the embodiments of the present invention have been described above, the above embodiments are merely a part of application examples of the present invention, and the technical scope of the present invention is not limited to the specific configurations of the above embodiments.

[0060] Explanation of symbols

[0061] 10: Shell

[0062] 20: Rotating motor

[0063] 21: Rotor

[0064] 22: Stator

[0065] 23: Rotation axis

[0066] 30: Speed ​​reduction mechanism

[0067] 31: First Gear

[0068] 32: Second gear

[0069] 33: Third gear

[0070] 34: Fourth Gear

[0071] 35: Fifth Gear

[0072] 36: Sixth gear

[0073] 40: Differential gear

[0074] 70: Inverter

[0075] 100: Components

[0076] AX1: First axis

[0077] AX2: Second axis

[0078] AX3: Third axis

[0079] AX4: Fourth Axis

Claims

1. A component having a housing, the housing housing: Oil; Rotating electrical machines; A first gear connected to the downstream of the rotating motor; a second gear meshing with the first gear; a third gear connected downstream of the second gear; a fourth gear meshing with the third gear; a fifth gear connected downstream of the fourth gear; a sixth gear meshing with the fifth gear, The rotating motor and the first gear are arranged on a first shaft, The second gear and the third gear are arranged on the second shaft, The fourth gear and the fifth gear are arranged on the third shaft, The sixth gear is arranged on the fourth shaft, The first axis and the fourth axis are arranged below the second axis and the third axis in the axial direction.

2. The assembly of claim 1, wherein: The first gear has a portion overlapping with the sixth gear when viewed in the radial direction.

3. An assembly as claimed in claim 1 or 2, wherein: The third gear and the fourth gear are arranged in a direction farther away from the stator of the rotating electric machine than the first gear, the second gear, the fifth gear, and the sixth gear.

4. The assembly of claim 3, wherein: having a differential gear connected downstream of the sixth gear, The differential gear is arranged on the fourth shaft. The differential gear protrudes in a direction away from the stator relative to the sixth gear.

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