Vehicle drive device

Abstract

A vehicle drive device (1) comprises: a rotary electric machine (10) having a stator (11) and a rotor (12); a power transmission mechanism (20) drivingly coupled to the rotor (12); a differential device (30) having a differential ring gear (31), a differential case (32), and a differential mechanism (33); and a case (50). The case (50) has a partition wall (54) disposed between the rotary electric machine (10) and the differential device (30), and the partition wall (54) has, in a portion in which the distance between a stator core (14) and the differential device (30) is shortest, an opening (54a) that is open so as to expose the stator core (14) partially to the differential device (30) side.

Description

[Technical field]

[0001] This technique relates to a vehicle drive device equipped with a rotating electric machine. [Background technology]

[0002] Conventionally, vehicle drive devices equipped with a rotating electric machine and applied to electric vehicles and hybrid vehicles have become widespread. In such vehicle drive devices, it is desirable to reduce the size of the case in order to improve the mountability in the vehicle. For this reason, in order to reduce the size of the case, a vehicle drive device has been developed in which a first shaft on which the rotating electric machine is mounted and a third shaft on which a differential device is mounted are arranged close to each other (see Patent Document 1). In this vehicle drive device, the stator of the rotating electric machine and the differential device are arranged so as not to overlap in the axial direction when viewed from the radial direction, and the first shaft and the third shaft are arranged close to each other so as not to interfere with each other between the stator and the differential device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-94932 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration described in Patent Document 1, the rotating electric machine and the differential device are arranged so as to spread out in the axial direction, which may cause the differential device to lean to one side or the other, resulting in unequal lengths of the drive shafts on the left and right. If the lengths of the left and right drive shafts differ, the drivability of the vehicle deteriorates, so as a countermeasure, it is necessary to add an output shaft to adjust the lengths on the left and right, but this will increase costs.

[0005] Therefore, an object of the present invention is to provide a vehicle drive device that can be made smaller while suppressing increases in cost. [Means for solving the problem]

[0006] This vehicle drive device includes a rotating electric machine having a stator having a stator core and coil ends protruding from the stator core on both sides in the axial direction, and a rotor rotatably provided relative to the stator, a power transmission mechanism drivingly connected to the rotor, a differential device having a differential ring gear drivingly connected to the power transmission mechanism, a differential case with the differential ring gear integrated therein, and a differential mechanism contained in the differential case, and a case that houses the rotating electric machine, the power transmission mechanism, and the differential device, wherein the case is an outer wall facing the outside; and a casing extending from the outer wall along the axial direction into the internal space of the case and extending in a direction intersecting the axial direction. A partition disposed between the rotating electric machine and the differential device and, The partition has an opening at a portion where the distance between the stator core and the differential device is shortest, the opening being open so that a portion of the stator core is exposed to the differential device. The vehicle drive device also includes a rotating electric machine having a stator having a stator core and coil ends protruding from the stator core on both sides in the axial direction, and a rotor rotatably provided relative to the stator, a power transmission mechanism drivingly connected to the rotor, a differential device having a differential ring gear drivingly connected to the power transmission mechanism, a differential case with the differential ring gear integrated therein, and a differential mechanism contained in the differential case, and a case that houses the rotating electric machine, the power transmission mechanism, and the differential device, and the case is configured to house the rotating electric machine and the differential The stator core has a partition wall arranged between the rotor and the differential device, and the partition wall has an opening at the portion where the distance between the stator core and the differential device is shortest so that a portion of the stator core is exposed to the differential device, and the stator core has bolt fixing holes that open along the axial direction at the outer periphery, and at the portion where the distance between the stator core and the differential device is shortest, the differential device is arranged to overlap a virtual circle that is centered on the center of rotation of the rotor and passes through the center of the bolt fixing hole when the stator core is viewed from the axial direction. The vehicle drive device also includes a rotating electric machine having a stator having a stator core and coil ends protruding from the stator core on both sides in the axial direction, and a rotor rotatably arranged relative to the stator, a power transmission mechanism drivingly connected to the rotor, a differential device having a differential ring gear drivingly connected to the power transmission mechanism, a differential case with the differential ring gear integrated therein, and a differential mechanism contained in the differential case, and a case that accommodates the rotating electric machine, the power transmission mechanism, and the differential device, has a partition arranged between the rotating electric machine and the differential device, the partition has an opening at a portion where the distance between the stator core and the differential device is shortest so that a portion of the stator core is exposed to the differential device, the power transmission mechanism is arranged on one axial side of the rotating electric machine, the opening has a first end face at an end on the one axial side facing the other axial side, and a second end face on the one axial side of the stator core is arranged in close contact with the first end face in the axial direction.

[0007] This allows for miniaturization while suppressing increases in costs. [Brief description of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view showing a vehicle drive device according to an embodiment. [Diagram 2] 2 is a cross-sectional view showing a state cut along line AA in FIG. 1. [Diagram 3] 2 is a cross-sectional view showing a state cut along line BB in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to FIGS. 1 to 3. In this embodiment, a case where a vehicle drive device 1 is applied to a front-wheel drive of an electric vehicle will be described. The vehicle drive device 1 will be outlined with reference to FIG. 1. The vehicle drive device 1 has a motor 10 as a rotating electric machine, a reduction mechanism 20 as a power transmission mechanism, a differential device 30, an inverter 40, and a case 50 that accommodates these. In this embodiment, the width direction of the vehicle on which the vehicle drive device 1 is mounted, that is, the axial direction of the rotation shafts of the motor 10 and the differential device 30 is defined as an axial direction D1, and the right side in FIG. 1 is represented as R and the left side as L. In addition, the driving connection refers to a state in which the rotating elements are connected to each other so as to be able to transmit a driving force, and is used as a concept including a state in which the rotating elements are connected to rotate integrally, or a state in which the rotating elements are connected to each other so as to be able to transmit a driving force via a clutch or the like.

[0010] The motor 10 includes a stator 11 fixed to a case 50, a rotor 12 rotatably provided on the inner periphery side of the stator 11, and a rotor shaft 13 rotatably supporting the rotor 12. The stator 11 includes a stator core 14 and a coil 15 wound around the stator core 14. Both ends of the coil 15 in the axial direction D1 form coil ends 15a protruding from the stator core 14 on both sides. The stator core 14 has bolt fixing holes 14c (see FIG. 2) opened along the axial direction D1 on the outer periphery. In this embodiment, the bolt fixing holes 14c are formed at three positions equidistant from the rotation center C1 (see FIG. 2) of the rotor 12 at a pitch of approximately 120 degrees in the circumferential direction. The stator core 14 is fixed by, for example, passing a bolt through the bolt fixing holes 14c and fastening it to the case body 51 from the left side L to the right side R. An inverter 40 is connected to the motor 10, and power supplied from a battery (not shown) is supplied to the motor 10 via the inverter 40, thereby driving the motor 10.

[0011] The reduction mechanism 20 includes a first rotating shaft 21 provided coaxially with the first axis A1, a second rotating shaft 22 provided coaxially with a second axis A2 arranged in parallel to the first axis A1 at a different position, a first gear 23 fixed to the first axis A1, and a second gear 24 and a third gear 25 fixed to the second axis A2. The first rotating shaft 21 is integrated with the rotor shaft 13. That is, the reduction mechanism 20 is drivingly connected to the rotor 12. The second gear 24 has a larger diameter than the first gear 23 and meshes with the first gear 23. The third gear 25 has a smaller diameter than a differential ring gear 31 described later and meshes with the differential ring gear 31. Therefore, the rotation of the rotor 12 is reduced in speed through the first rotating shaft 21 and the second rotating shaft 22 of the reduction mechanism 20 and is transmitted to the differential device 30. In this embodiment, the reduction gear mechanism 20 is disposed on one axial side R of the motor 10, and the third gear 25 is disposed on the other axial side L of the second gear 24.

[0012] The differential device 30 is provided coaxially with a third shaft A3 that is parallel to and located at a different position from the first shaft A1 and the second shaft A2. The differential device 30 has a differential ring gear 31 that is drivingly connected to the third gear 25 of the reduction mechanism 20, a differential case 32 in which the differential ring gear 31 is integrated, and a differential mechanism 33 that is contained in the differential case 32. The differential mechanism 33 absorbs the rotation difference between the left and right drive shafts that are mounted. The differential mechanism 33 is disposed at a position where the center of the axial direction D1 overlaps with the axial direction D1 when viewed from the radial direction of the motor 10. Note that a known appropriate mechanism can be applied to the differential mechanism 33, and therefore a detailed description thereof will be omitted.

[0013] An end portion on the right side R of the differential case 32 is rotatably supported on the case 50 by a bearing 34, and an end portion on the left side L is rotatably supported on the case 50 by a bearing 35. That is, the vehicle drive device 1 includes two bearings 34, 35 that rotatably support both ends of the differential case 32 in the axial direction D1 relative to the case 50. Of the two bearings 34, 35, the bearing 34 on the right side R is disposed at a position overlapping the differential ring gear 31 in the axial direction D1 when viewed radially.

[0014] The case 50 has a case body 51 that houses the motor 10, the speed reduction mechanism 20, and the differential gear 30, a first cover 52 that closes the left side L of the first space S1 that houses the motor 10, and a second cover 53 that closes the right side R of the second space S2 that houses the differential gear 30. The case body 51 has a partition wall 54 disposed between the motor 10 and the differential gear 30 (see FIG. 2).

[0015] The partition wall 54 has an opening 54a at a portion where the distance between the stator core 14 and the differential device 30 is shortest, which is opened so that a part of the stator core 14 is exposed on the differential device side (see FIG. 3). The opening 54a is, for example, circular, elliptical, rectangular, or cut-out shaped, and is a shape that penetrates the partition wall 54. The opening 54a is formed at the same time as the case body 51 is cast, but is not limited to this and may be formed by actually cutting out the opening 54a after the case body 51 is cast.

[0016] The portion where the distance between the stator core 14 and the differential device 30 is shortest is, for example, the shortest distance connecting a portion of the stator core end face 14a (second end face) on the differential device 30 side in the axial direction D1 of the stator core 14 in the radial direction to the differential device 30 and the differential device 30 that faces the stator core end face 14a. Alternatively, it may be the shortest distance connecting an end of the outer circumferential surface 14b of the stator core 14 on the differential device 30 side in the axial direction D1 and the differential device 30 that faces the stator core end face 14b. As a result, the stator core 14 and the differential device 30 directly face each other through the opening 54a, and the stator core 14 and the differential device 30 can be brought close to each other in the radial direction without being shifted in the axial direction D1, so that the vehicle drive device 1 can be made compact.

[0017] 3, in the portion where the distance between the stator core 14 and the differential device 30 is shortest, the differential device 30 is arranged to overlap an imaginary circle 14d that is centered on the rotation center C1 (first axis A1) of the rotor 12 and passes through the center of the bolt fixing hole 14c when the stator core 14 is viewed from the axial direction D1. This allows the stator core 14 and the differential device 30 to be close to each other in the radial direction, thereby making it possible to reduce the size of the vehicle drive device 1.

[0018] The opening 54a has an opening end surface 54b (first end surface) facing the left side L at the end on the right side R. The stator core end surface 14a on the right side R of the stator core 14 is disposed in close contact with the opening end surface 54b in the axial direction D1. The stator core 14 is fastened to the case body 51 toward the right side R with bolts, but the stator core end surface 14a and the opening end surface 54b are not strongly pressed against each other but are in close contact with each other. This prevents foreign matter contained in the lubricating oil scooped up by the differential case 32 from directly hitting the coil end 15a, which has a weak strength, between the stator core 14 and the opening end surface 54b.

[0019] The larger the size of the opening 54a, the easier it is to avoid interference with the differential case 32. However, if the size is too large, the supporting force when supporting the stator core 14 during deformation, which is one of the original functions of the partition wall 54, will be reduced. Therefore, the size of the opening 54a is, for example, at a minimum, about 3 mm in the axial direction D1, and at a maximum, from the stator core end face 14a to the center of the axial direction D1 of the stator core 14. That is, it is preferable that the end 54c of the left side L of the opening 54a is located on the right side R of the center of the axial direction D1 of the stator core 14. In this embodiment, the opening 54a is provided with a length of about 1 / 4 of the axial direction D1 of the stator core 14 from the stator core end face 14a. The size and position of the opening 54a are not limited to this, and can be appropriately set depending on the distance between the stator core 14 and the differential case 32 and the position in the axial direction D1.

[0020] A surface 54d of the partition wall 54 on the motor 10 side on the left side L of the opening 54a faces the outer peripheral surface 14b of the stator core 14. There is a slight clearance between the surface 54d and the outer peripheral surface 14b. As a result, even if the stator core 14 vibrates due to the driving of the vehicle drive device 1, the partition wall 54 supports it. In addition, since there is a clearance between the surface 54d and the outer peripheral surface 14b, foreign matter contained in the lubricating oil scooped up by the differential case 32 is not directly hit against the coil end 15a, so there is no problem.

[0021] As described above, according to the vehicle drive device 1 of this embodiment, in the portion where the distance between the stator core 14 and the differential device 30 is the shortest, the opening 54a is formed so that a part of the stator core 14 is exposed to the differential device 30. Therefore, the stator core 14 and the differential device 30 can be brought close to each other in the radial direction without being shifted in the axial direction D1. Furthermore, by not shifting the stator core 14 in the axial direction D1, the differential device 30 can be disposed in the center in the left-right direction, so that the drivability of the vehicle can be ensured without incurring an increase in cost due to the addition of an output shaft. Therefore, the vehicle drive device 1 can be made smaller while suppressing an increase in cost.

[0022] According to the vehicle drive device 1 of the present embodiment, the stator core end face 14a of the stator core 14 is disposed in close contact with the open end face 54b in the axial direction D1. This prevents foreign matter contained in the lubricating oil scooped up by the differential case 32 from directly hitting the coil end 15a.

[0023] According to the vehicle drive device 1 of the present embodiment, the end 54c on the left side L of the opening 54a is located on the right side R of the center in the axial direction D1 of the stator core 14. This allows the partition wall 54 to support the stator so as not to deform when the stator deforms due to vibration or the like.

[0024] Furthermore, according to the vehicle drive device 1 of this embodiment, the differential mechanism 33 of the differential device 30 is disposed at a position where the center of the axial direction D1 overlaps with the axial direction D1 when viewed from the radial direction of the motor 10. Therefore, the differential device 30 can be easily disposed at the center of the axial direction D1.

[0025] Furthermore, according to the vehicle drive device 1 of this embodiment, the third gear 25 of the reduction mechanism 20 is disposed to the left side L of the second gear 24, i.e., on the differential device 30 side, and the third gear 25 is meshed with the differential ring gear 31. Therefore, the reduction mechanism 20 does not need to be elongated in the axial direction D1, and the differential device 30 can be easily disposed in the center of the axial direction D1.

[0026] Furthermore, according to the vehicle drive device 1 of the present embodiment, the bearing 34 on the right side R of the differential case 32 is disposed at a position overlapping the differential ring gear 31 in the axial direction D1 when viewed from the radial direction. This allows the vehicle drive device 1 to be made more compact.

[0027] Although the vehicle drive device 1 of this embodiment has been described as being applied to a front-wheel drive electric vehicle, the present invention is not limited to this and may also be applied to, for example, a rear-wheel drive electric vehicle or a hybrid vehicle.

[0028] [Summary of this embodiment] The vehicle drive device (1) of this embodiment includes: a rotating electric machine (10) including a stator (11) having a stator core (14) and coil ends (15a) protruding from the stator core (14) on both sides in an axial direction (D1), and a rotor (12) rotatably provided with respect to the stator (11); a power transmission mechanism (20) drivingly connected to the rotor (12); a differential device (30) including a differential ring gear (31) drivingly connected to the power transmission mechanism (20), a differential case (32) integrated with the differential ring gear (31), and a differential mechanism (33) contained in the differential case (32); a case (50) that houses the rotating electric machine (10), the power transmission mechanism (20), and the differential device (30), The case (50) has a partition wall (54) disposed between the rotating electric machine (10) and the differential device (30), The partition (54) has an opening (54a) at the portion where the distance between the stator core (14) and the differential device (30) is shortest, the opening (54a) being open so that a portion of the stator core (14) is exposed on the side of the differential device (30).

[0029] According to this configuration, the stator core (14) and the differential device (30) can be disposed close to each other in the radial direction without being shifted in the axial direction (D1). Furthermore, since the differential device (30) can be disposed in the center in the lateral direction by not shifting in the axial direction (D1), the drivability of the vehicle can be ensured without increasing the cost due to the addition of an output shaft. Therefore, the vehicle drive device (1) can be made compact while suppressing the increase in cost.

[0030] In addition, the vehicle drive device (1) of the present embodiment is The stator core (14) has a bolt fixing hole (14c) that opens along the axial direction (D1) in an outer periphery thereof, It is preferable that, in the portion where the distance between the stator core (14) and the differential device (30) is shortest, the differential device (30) is positioned so as to overlap a virtual circle (14d) that is centered on the center of rotation of the rotor (12) and passes through the center of the bolt fixing hole (14c) when the stator core (14) is viewed from the axial direction (D1).

[0031] According to this configuration, the stator core (14) and the differential device (30) can be disposed radially closer to each other, thereby making it possible to further reduce the size of the vehicle drive device (1).

[0032] In addition, the vehicle drive device (1) of the present embodiment is the power transmission mechanism (20) is disposed on one axial side (R) of the rotating electric machine (10); The opening (54a) has a first end surface (54b) facing the other axial side (L) at an end portion on the one axial side (R), It is preferable that a second end face (14a) on the one axial side (R) of the stator core (14) is disposed in close contact with the first end face (54b) in the axial direction (D1).

[0033] This configuration can prevent foreign matter contained in the lubricating oil scooped up by the differential case (32) from directly hitting the coil end (15a).

[0034] In addition, the vehicle drive device (1) of the present embodiment is It is preferable that an end portion (54c) of the opening (54a) on the other axial side (L) is located on the one axial side (R) relative to the center of the axial direction (D1) of the stator core (14).

[0035] According to this configuration, even if the stator (11) is deformed due to vibration or the like, the stator (11) can be supported by the partition wall (54) so ​​as not to be deformed.

[0036] In addition, the vehicle drive device (1) of the present embodiment is the power transmission mechanism (20) is a reduction gear mechanism (20) including: a first rotating shaft (21) disposed on one axial side (R) with respect to the rotating electric machine (10) and drivingly connected to the rotor (12); a first gear (23) fixed to the first rotating shaft (21); a second rotating shaft (22) disposed parallel to the first rotating shaft (21); a second gear (24) fixed to the second rotating shaft (22), having a larger diameter than the first gear (23) and meshing with the first gear (23); and a third gear (25) fixed to the second rotating shaft (22), disposed on the other axial side (L) of the second gear (24), having a smaller diameter than the differential ring gear (31) and meshing with the differential ring gear (31); It is preferable that the differential mechanism (33) be disposed at a position where a center of the axial direction (D1) overlaps with the axial direction (D1) when viewed from a radial direction of the rotating electric machine (10).

[0037] According to this configuration, the differential device (30) can be easily disposed in the center in the axial direction (D1).

[0038] In addition, the vehicle drive device (1) of the present embodiment is two bearings (34, 35) that rotatably support both ends of the differential case (32) in the axial direction (D1) relative to the case (50); It is preferable that the bearing (34) on one axial side (R) of the two bearings (34, 35) is arranged in a position overlapping the axial direction (D1) when viewed radially relative to the differential ring gear (31).

[0039] According to this configuration, the vehicle drive device (1) can be further reduced in size. [Industrial Applicability]

[0040] A vehicle drive device according to the present disclosure can be used industrially, for example, as a vehicle drive device including a rotating electric machine mounted on a vehicle such as an automobile. [Explanation of symbols]

[0041] 1...vehicle drive device, 10...motor (rotating electric machine), 11...stator, 12...rotor, 14...stator core, 14a...stator core end face (second end face), 14c...bolt fixing hole, 14d...virtual circle, 15a...coil end, 20...reduction mechanism (power transmission mechanism), 21...first rotating shaft, 22...second rotating shaft, 23...first gear, 24...second gear, 25...third gear, 30...differential device, 31...differential ring gear, 32...differential case, 33...differential mechanism, 34, 35...bearing, 50...case, 54...partition wall, 54a...opening, 54b...opening end face (first end face), 54c...end, D1...axial direction, L...left side (other axial side), R...right side (one axial side)

Claims

1. a rotating electric machine including a stator having a stator core and coil ends protruding from the stator core on both sides in an axial direction, and a rotor provided rotatably relative to the stator; a power transmission mechanism drivingly connected to the rotor; A differential device including a differential ring gear drivingly connected to the power transmission mechanism, a differential case integrated with the differential ring gear, and a differential mechanism contained in the differential case; a case that houses the rotating electric machine, the power transmission mechanism, and the differential device, the case has an outer wall facing the outside, and a partition wall extending from the outer wall along the axial direction into an internal space of the case and disposed between the rotating electric machine and the differential device in a direction intersecting the axial direction, the partition has an opening at a portion where a distance between the stator core and the differential device is shortest, the opening being opened so that a portion of the stator core is exposed to the differential device. A drive unit for a vehicle.

2. the stator core has a bolt fixing hole opening along the axial direction at an outer periphery thereof, When the stator core is viewed from the axial direction, at a portion where the distance between the stator core and the differential device is shortest, the differential device is disposed so as to overlap with a virtual circle that is centered on the rotation center of the rotor and passes through the center of the bolt fixing hole. The vehicle drive device according to claim 1 .

3. the power transmission mechanism is disposed on one axial side of the rotating electric machine, The opening has a first end surface facing the other axial side at an end portion on the one axial side, A second end surface on the one axial side of the stator core is disposed in close contact with the first end surface in the axial direction. The vehicle drive device according to claim 1 .

4. an end portion of the opening on the other axial side is located on the one axial side of a center of the stator core in the axial direction; The vehicle drive device according to claim 3 .

5. the power transmission mechanism is a reduction mechanism including: a first rotating shaft disposed on one axial side of the rotating electric machine and drivingly connected to the rotor; a first gear fixed to the first rotating shaft; a second rotating shaft disposed parallel to the first rotating shaft; a second gear fixed to the second rotating shaft, having a larger diameter than the first gear and meshing with the first gear; and a third gear fixed to the second rotating shaft, disposed on the other axial side of the second gear, having a smaller diameter than the differential ring gear and meshing with the differential ring gear; The differential mechanism is disposed at a position where a center of the differential mechanism in the axial direction overlaps with the rotating electric machine in the axial direction when viewed from a radial direction. The vehicle drive device according to any one of claims 1 to 4.

6. Two bearings are provided to rotatably support both ends of the differential case in the axial direction relative to the case, The bearing on one side in the axial direction of the two bearings is disposed at a position overlapping the differential ring gear in the axial direction when viewed from a radial direction. The vehicle drive device according to claim 5 .

7. A rotating electric machine including a stator having a stator core and coil ends protruding from the stator core on both sides in the axial direction, and a rotor rotatably provided with respect to the stator; a power transmission mechanism drivingly connected to the rotor; A differential device including a differential ring gear drivingly connected to the power transmission mechanism, a differential case integrated with the differential ring gear, and a differential mechanism contained in the differential case; a case that houses the rotating electric machine, the power transmission mechanism, and the differential device, the case has a partition wall disposed between the rotating electric machine and the differential device, the partition has an opening at a portion where a distance between the stator core and the differential device is shortest, the opening being opened so that a portion of the stator core is exposed to the differential device, the stator core has a bolt fixing hole opening along the axial direction at an outer periphery thereof, When the stator core is viewed from the axial direction, at a portion where the distance between the stator core and the differential device is shortest, the differential device is disposed so as to overlap with a virtual circle that is centered on the rotation center of the rotor and passes through the center of the bolt fixing hole. A drive unit for a vehicle.

8. A rotating electric machine including a stator having a stator core and coil ends protruding from the stator core on both sides in the axial direction, and a rotor rotatably provided with respect to the stator; a power transmission mechanism drivingly connected to the rotor; A differential device including a differential ring gear drivingly connected to the power transmission mechanism, a differential case integrated with the differential ring gear, and a differential mechanism contained in the differential case; a case that houses the rotating electric machine, the power transmission mechanism, and the differential device, the case has a partition wall disposed between the rotating electric machine and the differential device, the partition has an opening at a portion where a distance between the stator core and the differential device is shortest, the opening being opened so that a portion of the stator core is exposed to the differential device, the power transmission mechanism is disposed on one axial side of the rotating electric machine, The opening has a first end surface facing the other axial side at an end portion on the one axial side, A second end surface on the one axial side of the stator core is disposed in close contact with the first end surface in the axial direction. A drive unit for a vehicle.

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