阅读说明：本技术 驱动装置 (Drive device ) 是由 石川勇树 于 2020-04-13 设计创作，主要内容包括：提供驱动装置,本发明的一个方式是使车辆的车轴进行旋转的驱动装置,其具有：马达,其具有能够以马达轴线为中心进行旋转的转子和包围转子的定子；减速装置,其与马达连接；差动装置,其经由减速装置而与马达连接；壳体,其具有在内部收纳马达的马达收纳部；旋转检测装置,其能够检测转子的旋转；以及布线组件,其与旋转检测装置连接,具有第1连接器和从第1连接器延伸的第1布线。壳体具有收纳旋转检测装置的装置收纳部。装置收纳部在马达轴线的轴向上位于马达收纳部的一侧。马达收纳部具有供布线组件通过的布线通路。布线组件从旋转检测装置经由马达收纳部的内部延伸到布线通路。旋转检测装置具有供第1连接器从轴向的另一侧连接的第2连接器。(One aspect of the present invention is a drive device for rotating an axle of a vehicle, the drive device including: a motor having a rotor rotatable about a motor axis and a stator surrounding the rotor; a reduction gear connected to the motor; a differential device connected to the motor via a reduction gear; a housing having a motor housing section for housing a motor therein; a rotation detecting device capable of detecting rotation of the rotor; and a wiring assembly connected to the rotation detecting device and having a 1 st connector and a 1 st wiring extending from the 1 st connector. The housing has a device housing section for housing the rotation detection device. The device housing portion is located on one side of the motor housing portion in the axial direction of the motor axis. The motor housing portion has a wiring passage through which the wiring member passes. The wiring member extends from the rotation detection device to the wiring passage through the inside of the motor housing portion. The rotation detecting device has a 2 nd connector to which the 1 st connector is connected from the other side in the axial direction.)

1. A drive device for rotating an axle of a vehicle,

the driving device comprises:

a motor having a rotor rotatable about a motor axis and a stator surrounding the rotor;

a reduction gear connected to the motor;

a differential device connected to the motor via the reduction gear;

a housing having a motor housing portion that houses the motor therein;

rotation detecting means capable of detecting rotation of the rotor; and

a wiring assembly connected to the rotation detecting device and having a 1 st connector and a 1 st wiring extending from the 1 st connector,

the housing has a device housing portion housing the rotation detection device,

the device housing portion is located on one side of the motor housing portion in an axial direction of the motor axis,

the motor housing portion has a wiring passage through which the wiring member passes,

the wiring member extends from the rotation detecting device to the wiring passage via the inside of the motor housing portion,

the rotation detecting device has a 2 nd connector to which the 1 st connector is connected from the other side in the axial direction.

2. The drive apparatus according to claim 1,

the rotor has a rotor body facing the stator with a gap therebetween inside the stator,

the 2 nd connector is located on one side of the rotor body in the axial direction,

the housing has a protective wall portion located between the 2 nd connector and the axial direction of the rotor body.

3. The drive device according to claim 2,

the entire 2 nd connector is covered with the protective wall portion from the other side in the axial direction.

4. The drive device according to claim 2 or 3,

the motor has a bearing that supports the rotor to be rotatable,

the housing has a holding portion that holds the bearing,

the protective wall portion extends from the holding portion to an outer side in a radial direction around the motor axis.

5. The drive device according to any one of claims 1 to 4,

the motor has:

a bus bar electrically connected with the stator; and

a bus bar holder that holds the bus bar,

the wiring assembly has:

a 2 nd wiring connected to the 1 st wiring and passing through the wiring via; and

a relay connector connecting the 1 st wiring and the 2 nd wiring,

the relay connector is held by the bus bar holder.

6. The drive device according to any one of claims 1 to 4,

the motor has:

a bus bar electrically connected with the stator; and

a bus bar holder that holds the bus bar,

the 1 st wiring passes through the wiring via,

the bus bar holder has a wiring holding portion that holds the 1 st wiring.

7. The drive device according to any one of claims 1 to 6,

the housing has a partition wall portion that partitions an interior of the motor housing portion and an interior of the device housing portion,

a wiring through hole is provided in the partition wall portion, the wiring through hole connecting an inside of the motor housing portion and an inside of the device housing portion,

the wiring member extends from the 2 nd connector to the inside of the motor housing portion through the wiring through hole.

8. The drive device according to any one of claims 1 to 7,

the rotor has a shaft centered on the motor axis,

an end portion of the shaft on one side in the axial direction protrudes toward an inside of the device housing portion,

the rotation detecting device is a resolver having a resolver rotor fixed to a portion of the shaft that protrudes toward the inside of the device housing portion, and a resolver stator located outside the resolver rotor in a radial direction of the motor axis.

9. The drive apparatus according to claim 8,

a stepped portion that reduces an outer diameter of the shaft is provided at an end portion of the shaft on one side in the axial direction,

the rotation detecting device includes a fixing member that fixes the resolver rotor by pressing the resolver rotor from one side in the axial direction against the stepped portion,

the fixing member is an annular member that is press-fitted into an end portion of the shaft on one side in the axial direction.

10. A drive device for rotating an axle of a vehicle,

the driving device comprises:

a motor having a rotor rotatable about a motor axis and a stator surrounding the rotor;

a reduction gear connected to the motor;

a differential device connected to the motor via the reduction gear;

a housing having a motor housing portion that houses the motor therein;

rotation detecting means capable of detecting rotation of the rotor; and

a wiring assembly connected to the rotation detecting device and having a 1 st connector and a 1 st wiring extending from the 1 st connector,

the housing has a device housing portion housing the rotation detection device,

the device housing portion is located on one side of the motor housing portion in an axial direction of the motor axis,

the rotation detecting device has a 2 nd connector to which the 1 st connector is connected from the other side in the axial direction.

Technical Field

The present invention relates to a drive device.

Background

There is known a vehicle drive device including a rotation detection device that detects rotation of a motor. For example, patent document 1 describes a vehicle driving device having a resolver as a rotation detection device.

Patent document 1: japanese patent laid-open publication No. 2016-121732

In the above-described driving device, for example, the wiring of the wiring module connected to the rotation detecting device may be complicated. Therefore, man-hours and time required for assembly of the driving apparatus are likely to increase.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a driving device having a structure capable of suppressing complication of winding of a wiring module connected to a rotation detecting device.

One aspect of the drive device according to the present invention is a drive device for rotating an axle of a vehicle, including: a motor having a rotor rotatable about a motor axis and a stator surrounding the rotor; a reduction gear connected to the motor; a differential device connected to the motor via the reduction gear; a housing having a motor housing portion that houses the motor therein; rotation detecting means capable of detecting rotation of the rotor; and a wiring assembly connected to the rotation detecting device and having a 1 st connector and a 1 st wiring extending from the 1 st connector. The housing has a device housing portion that houses the rotation detection device. The device housing portion is located on one side of the motor housing portion in an axial direction of the motor axis. The motor housing portion has a wiring passage through which the wiring member passes. The wiring member extends from the rotation detecting device to the wiring passage through the inside of the motor housing portion. The rotation detecting device has a 2 nd connector to which the 1 st connector is connected from the other side in the axial direction.

One aspect of the drive device according to the present invention is a drive device for rotating an axle of a vehicle, including: a motor having a rotor rotatable about a motor axis and a stator surrounding the rotor; a reduction gear connected to the motor; a differential device connected to the motor via the reduction gear; a housing having a motor housing portion that houses the motor therein; rotation detecting means capable of detecting rotation of the rotor; and a wiring assembly connected to the rotation detecting device and having a 1 st connector and a 1 st wiring extending from the 1 st connector. The housing has a device housing portion that houses the rotation detection device. The device housing portion is located on one side of the motor housing portion in an axial direction of the motor axis. The rotation detecting device has a 2 nd connector to which the 1 st connector is connected from the other side in the axial direction.

According to one aspect of the present invention, in the driving device, it is possible to suppress complication of winding of the wiring module connected to the rotation detecting device.

Drawings

Fig. 1 is a schematic configuration diagram schematically illustrating a driving device according to the present embodiment.

Fig. 2 is a perspective view showing the driving device of the present embodiment.

Fig. 3 is a perspective view showing a part of the driving device of the present embodiment.

Fig. 4 is a sectional view showing a part of the driving device of the present embodiment, and is an IV-IV sectional view in fig. 3.

Fig. 5 is a perspective view showing the motor housing section of the present embodiment.

Fig. 6 is a perspective view showing the bearing holder and the rotation detecting device of the present embodiment.

Fig. 7 is a cross-sectional view showing a part of a drive device according to a modification of the present embodiment.

Description of the reference symbols

1: a drive device; 2: a motor; 4: a reduction gear; 5: a differential device; 6: a housing; 20: a rotor; 21: a shaft; 21 b: a step portion; 24: a rotor body; 26: a bearing; 30: a stator; 55: an axle; 70: a rotation detecting device; 71: a rotary transformer rotor; 72: a resolver stator; 76: a 2 nd connector; 78: a fixing member; 83: a motor storage section; 83 a: a wiring via; 84 a: a partition wall portion; 84 c: a holding section; 84 d: a wiring through hole; 84 g: a protective wall portion; 84 h: a device housing section; 101. 201: a wiring assembly; 101a, 201 a: 1 st wiring; 101 b: a 2 nd wiring; 101 c: a 1 st connector; 101d, 101 e: a relay connector; 110. 210: a bus bar holder; 111: a bus bar; 210 b: a wiring holding section; j1: a motor axis.

Detailed Description

In the following description, the vertical direction is defined based on the positional relationship when the drive device 1 of the present embodiment is mounted on a vehicle on a horizontal road surface, and the description is given. In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction is the vertical direction. The + Z side is the upper side in the vertical direction, and the-Z side is the lower side in the vertical direction. In the following description, the vertical upper side is simply referred to as "upper side", and the vertical lower side is simply referred to as "lower side". The X-axis direction is a direction perpendicular to the Z-axis direction, and is a front-rear direction of a vehicle on which the driving device is mounted. In the following embodiments, the + X side is the front side of the vehicle and the-X side is the rear side of the vehicle. The Y-axis direction is a direction perpendicular to both the X-axis direction and the Z-axis direction, and is a vehicle lateral direction, that is, a vehicle width direction. In the following embodiments, the + Y side is the left side of the vehicle and the-Y side is the right side of the vehicle. The front-back direction and the left-right direction are horizontal directions perpendicular to the vertical direction.

The positional relationship in the front-rear direction is not limited to the positional relationship in the following embodiments, and the + X side may be the rear side of the vehicle and the-X side may be the front side of the vehicle. In this case, the + Y side is the right side of the vehicle and the-Y side is the left side of the vehicle.

The motor axis J1 shown in the drawings as appropriate extends in the Y-axis direction, i.e., the left-right direction of the vehicle. In the following description, unless otherwise specified, a direction parallel to the motor axis J1 is simply referred to as an "axial direction", a radial direction about the motor axis J1 is simply referred to as a "radial direction", and a circumferential direction about the motor axis J1, that is, a direction about the motor axis J1 is simply referred to as a "circumferential direction". In the present specification, the "parallel direction" also includes a substantially parallel direction, and the "perpendicular direction" also includes a substantially perpendicular direction. In the present embodiment, the right side (-Y side) in the left-right direction of the vehicle corresponds to one side in the axial direction, and the left side (+ Y side) in the left-right direction of the vehicle corresponds to the other side in the axial direction. In the following description, the right side is referred to as "one axial side", and the left side is referred to as "the other axial side".

The drive device 1 of the present embodiment shown in fig. 1 to 3 is mounted on a vehicle having a motor as a power source, such as a Hybrid Electric Vehicle (HEV), a plug-in hybrid electric vehicle (PHV), or an Electric Vehicle (EV), and is used as the power source. As shown in fig. 1, the drive device 1 includes a motor 2, a reduction gear 4, a differential 5, a casing 6, an inverter unit 8, an oil cooler 97, and an oil pump 96. The housing 6 has: a housing main body 81 that houses the motor 2 and a rotation detection device 70 described later; and a gear housing portion 82 that houses the reduction gear 4 and the differential gear 5 therein. The gear housing 82 is located on the other axial side (+ Y side) of the housing main body 81.

In the present embodiment, the motor 2 is an inner rotor type motor. The motor 2 has a rotor 20, a stator 30, and bearings 26 and 27. The rotor 20 is rotatable about a motor axis J1 extending in the horizontal direction. The rotor 20 has a shaft 21 and a rotor body 24. The rotor body 24 is fixed to the outer peripheral surface of the shaft 21. The rotor main body 24 faces the stator 30 with a gap therebetween on the radially inner side of the stator 30. Although not shown, the rotor body 24 includes a rotor core and a rotor magnet fixed to the rotor core. The torque of the rotor 20 is transmitted to the reduction gear 4.

The shaft 21 extends in the axial direction about the motor axis J1. The shaft 21 rotates about a motor axis J1. The shaft 21 is a hollow shaft having a hollow portion 22 provided therein. A communication hole 23 is provided in the shaft 21. The communication hole 23 extends in the radial direction and connects the hollow portion 22 and the outside of the shaft 21.

The shaft 21 extends across the housing main body 81 and the gear housing 82 of the housing 6. The end of the shaft 21 on the other axial side (+ Y side) protrudes into the gear housing 82. A 1 st gear 41 of the reduction gear 4, which will be described later, is fixed to the other end of the shaft 21 in the axial direction. The shaft 21 is rotatably supported by bearings 26 and 27. As shown in fig. 4, one axial end portion (-Y side) of the shaft 21 protrudes into an apparatus housing portion 84h described later. A stepped portion 21b that reduces the outer diameter of the shaft 21 is provided at one axial end of the shaft 21. Thereby, the axial end of the shaft 21 becomes a reduced diameter portion 21a having a reduced outer diameter.

As shown in fig. 1, the stator 30 is opposed to the rotor 20 with a gap in the radial direction. In more detail, the stator 30 is located radially outside the rotor 20. The stator 30 surrounds the rotor 20. The stator 30 has a stator core 32 and a coil assembly 33. The stator core 32 is fixed to the inner peripheral surface of the housing main body 81. Although not shown, the stator core 32 includes a cylindrical core back portion extending in the axial direction and a plurality of teeth extending radially inward from the core back portion.

The coil assembly 33 has a plurality of coils 31 circumferentially mounted on the stator core 32. The plurality of coils 31 are attached to respective teeth of the stator core 32 via insulators not shown. The plurality of coils 31 are arranged in the circumferential direction. More specifically, the plurality of coils 31 are arranged at equal intervals in the circumferential direction for one turn. Although not shown in the drawings, the coil assembly 33 may include a binding member or the like for binding the coils 31, or may include a crossover for connecting the coils 31 to each other.

The coil assembly 33 has coil ends 33a, 33b projecting from the stator core 32 in the axial direction. The coil end 33a is a portion protruding from the stator core 32 to one axial side (the Y side). The coil end 33b is a portion that protrudes from the stator core 32 to the other axial side (+ Y side). The coil end 33a includes a portion of each coil 31 included in the coil assembly 33 that protrudes to one side in the axial direction from the stator core 32. The coil end 33b includes a portion of each coil 31 included in the coil assembly 33 that protrudes further in the axial direction than the stator core 32. In the present embodiment, the coil ends 33a and 33b are annular with the motor axis J1 as the center. Although not shown, the coil ends 33a and 33b may include a binding member or the like for binding the coils 31, or may include a crossover wire for connecting the coils 31 to each other.

The bearings 26 and 27 rotatably support the rotor 20. More specifically, the bearings 26 and 27 rotatably support the shaft 21. The bearings 26 and 27 are ball bearings, for example. The bearing 26 is a bearing that rotatably supports a portion of the rotor 20 located on one axial side (the Y side) of the stator core 32. In the present embodiment, the bearing 26 supports a portion of the shaft 21 located on one axial side of a portion to which the rotor body 24 is fixed. The bearing 26 is held by a bearing holder 84, described later, in the housing main body 81.

The bearing 27 is a bearing that rotatably supports a portion of the rotor 20 located on the other axial side (+ Y side) than the stator core 32. In the present embodiment, the bearing 27 supports a portion of the shaft 21 located on the other axial side than the portion to which the rotor body 24 is fixed. The bearing 27 is held by a partition wall 61c described later.

As shown in fig. 4, the motor 2 has a bus bar holder 110 and a bus bar 111. The bus bar holder 110 holds the bus bar 111. The bus bar holder 110 is provided on the stator 30. In more detail, the bus bar holder 110 is provided in a portion of the stator core 32 that is located obliquely above the rear side (-X side). The bus bar holder 110 is supported on the outer peripheral surface of the stator core 32. The bus bar 111 is electrically connected to the stator 30. Although not shown, a coil lead wire drawn from the coil 31 is connected to the bus bar 111.

The reduction gear 4 is connected to the motor 2. In more detail, the reduction gear 4 is connected to the end of the other side (+ Y side) in the axial direction of the shaft 21. The reduction gear 4 reduces the rotation speed of the motor 2 and increases the torque output from the motor 2 according to the reduction ratio. The reduction gear 4 transmits the torque output from the motor 2 to the differential device 5. The reduction gear 4 has a 1 st gear 41, a 2 nd gear 42, a 3 rd gear 43, and an intermediate shaft 45.

The 1 st gear 41 is fixed to the outer peripheral surface of the end portion on the other side (+ Y side) in the axial direction of the shaft 21. The 1 st gear 41 rotates together with the shaft 21 about the motor axis J1. The intermediate shaft 45 extends along an intermediate axis J2. In the present embodiment, the intermediate axis J2 is parallel to the motor axis J1. In the present embodiment, the intermediate axis J2 is located below the motor axis J1. Although not shown, the intermediate axis J2 is located on the rear side (on the (-X) side) of the motor axis J1, for example. The intermediate shaft 45 rotates about the intermediate axis J2.

The 2 nd gear 42 and the 3 rd gear 43 are fixed on the outer peripheral surface of the intermediate shaft 45. The 2 nd gear 42 and the 3 rd gear 43 are connected via an intermediate shaft 45. The 2 nd gear 42 and the 3 rd gear 43 rotate about the intermediate axis J2. The 2 nd gear 42 meshes with the 1 st gear 41. The 3 rd gear 43 meshes with a ring gear 51 of the differential device 5, which will be described later. The 2 nd gear 42 has an outer diameter larger than that of the 3 rd gear 43. In the present embodiment, the lower end of the 2 nd gear 42 is the lowermost portion of the reduction gear 4.

The torque output from the motor 2 is transmitted to the differential device 5 via the reduction gear device 4. More specifically, the torque output from the motor 2 is sequentially transmitted to the ring gear 51 of the differential device 5 via the shaft 21, the 1 st gear 41, the 2 nd gear 42, the counter shaft 45, and the 3 rd gear 43. The gear ratio of each gear, the number of gears, and the like can be variously changed according to a required reduction ratio. In the present embodiment, the reduction gear 4 is a parallel-axis gear type reduction gear in which the axes of the gears are arranged in parallel.

The differential device 5 is connected to the reduction gear 4. Thereby, the differential device 5 is connected to the motor 2 via the reduction gear 4. The differential device 5 is a device for transmitting the torque output from the motor 2 to the wheels of the vehicle. When the vehicle turns, the differential device 5 absorbs a speed difference between the left and right wheels and transmits the same torque to the axles 55 of the left and right wheels. The differential device 5 rotates the axle 55 about the differential axis J3. Thereby, the drive device 1 rotates the axle 55 of the vehicle.

In the present embodiment, the differential axis J3 is parallel to the motor axis J1. That is, in the present embodiment, the motor axis J1 extends in a direction parallel to the differential axis J3. The front-rear direction is a direction perpendicular to both the axial direction and the vertical direction of the differential axis J3. As shown in fig. 2, in the present embodiment, the differential axis J3 is located on the rear side (-X side) of the motor axis J1. The differential axis J3 is located on the lower side of the motor axis J1. Although not shown, the differential axis J3 is located rearward of the intermediate axis J2. In fig. 1, the differential axis J3 is schematically shown below the intermediate axis J2, but the differential axis J3 is located substantially at the same position as the intermediate axis J2 in the vertical direction, for example. The differential axis J3 is located slightly above the intermediate axis J2, for example.

Although not shown, the differential device 5 is located on the rear side (-X side) of the reduction gear unit 4 inside the gear housing 82. As shown in fig. 1, the differential device 5 includes a ring gear 51, a gear box, a pair of pinion gears, a pinion shaft, and a pair of side gears. The ring gear 51 is a gear that rotates about the differential axis J3. The ring gear 51 meshes with the 3 rd gear 43. Thereby, the torque output from the motor 2 is transmitted to the ring gear 51 via the reduction gear 4. The lower end of the ring gear 51 is located below the reduction gear 4. In the present embodiment, the lower end portion of the ring gear 51 is the lowermost portion of the differential device 5.

The housing 6 is a member constituting a casing of the drive device 1. As shown in fig. 1, the housing 6 has a partition wall 61c that partitions the inside of the housing main body 81 and the inside of the gear housing 82 in the axial direction from each other. The partition wall 61c is provided with a partition wall opening 68. The inside of the case main body 81 and the inside of the gear housing 82 are connected to each other via the partition wall opening 68.

Oil O is contained in the casing 6. More specifically, the oil O is contained inside the case main body 81 and inside the gear containing portion 82. An oil reservoir P for storing oil O is provided in a lower region inside the gear housing 82. The oil level S of the oil reservoir P is located above the lower end of the ring gear 51. Thereby, the lower end portion of the ring gear 51 is immersed in the oil O in the gear housing portion 82. The oil level S of the oil reservoir P is located below the differential axis J3 and the axle 55.

The oil O in the oil reservoir P is delivered to the inside of the casing main body 81 through an oil passage 90 described later. The oil O sent to the inside of the casing main body 81 is accumulated in the lower region of the inside of the casing main body 81. At least a part of the oil O stored in the casing main body 81 moves to the gear housing 82 through the partition opening 68 and returns to the oil reservoir P.

In the present specification, the phrase "oil is contained in a certain portion" means that the oil is contained in the certain portion at least in a portion where the motor is being driven, and the oil may not be contained in the certain portion when the motor is stopped. For example, in the present embodiment, the oil O is stored in the casing main body 81, and the oil O may be located in the casing main body 81 at least in a part where the motor 2 is being driven, and all of the oil O in the casing main body 81 may move to the gear storage portion 82 through the partition opening 68 when the motor 2 is stopped. A part of the oil O fed into the casing main body 81 by the oil passage 90 described later may remain in the casing main body 81 in a state where the motor 2 is stopped.

In the present specification, the phrase "the lower end portion of the ring gear is immersed in the oil in the gear housing" means that the lower end portion of the ring gear may be immersed in the oil in the gear housing at least in a part where the motor is driving, and the lower end portion of the ring gear may not be immersed in the oil in the gear housing in a part of a period where the motor is driving or the motor is stopped. For example, as a result of the oil O in the oil reservoir P being delivered to the interior of the casing main body 81 by the oil passage 90 described later, the oil level S of the oil reservoir P may be lowered, and the lower end portion of the ring gear 51 may be temporarily left without being immersed in the oil O.

The oil O circulates in an oil passage 90 described later. The oil O is used for lubrication of the reduction gear 4 and the differential 5. In addition, the oil O is used for cooling the motor 2. As the oil O, in order to realize the functions of a lubricating oil and a cooling oil, it is preferable to use an oil having a relatively low viscosity equivalent to an Automatic Transmission lubricating oil (ATF).

As shown in fig. 1, the bottom 82a of the gear housing 82 is located below the bottom 81a of the housing main body 81. Therefore, the oil O fed from the inside of the gear housing portion 82 into the case main body 81 easily flows into the gear housing portion 82 through the partition wall opening 68. As shown in fig. 2, the gear housing 82 extends in the front-rear direction. The end of the gear housing 82 on the front side (+ X side) is connected to the end of the housing main body 81 on the other side (+ Y side) in the axial direction. The rear side (-X side) end of the gear housing 82 protrudes rearward beyond the case body 81.

The gear housing 82 has a projection 82 b. The protruding portion 82b is a portion that protrudes rearward (X side) and downward than the end portion of the other side (+ Y side) in the axial direction of the housing main body 81. The projection 82b has a circular hole 82c centered on the differential axis J3. The hole 82c axially penetrates the projection 82 b. Although not shown, the axle 55 passes through the hole 82 c.

The housing main body 81 has a cylindrical shape surrounding the motor axis J1. The housing main body 81 is, for example, substantially cylindrical and extends in the axial direction. The housing body 81 includes a motor housing portion 83, a bearing holder 84, and a cover portion 85. That is, the housing 6 has a motor housing 83. As shown in fig. 4, the motor housing portion 83 houses the motor 2 therein. More specifically, the motor housing 83 houses a part of the shaft 21, the rotor body 24, and the stator 30 therein. The motor housing portion 83 is substantially cylindrical and is open on one axial side (the Y side). As shown in fig. 5, the motor housing portion 83 has a connector mounting portion 83 d. The connector mounting portion 83d is provided at the end portion on the rear side (-X side) among the end portions on one side (-Y side) in the axial direction of the motor housing portion 83. The connector mounting portion 83d projects toward the rear side obliquely axial direction side. As shown in fig. 3, the 3 rd connector 100 is mounted on the connector mounting portion 83 d. The 3 rd connector 100 protrudes toward the rear side obliquely axial one side.

As shown in fig. 5, the motor housing portion 83 has a wiring passage 83a and a bus bar through hole 83 e. The wiring passage 83a is a passage through which the wiring module 101 described later passes. In the present embodiment, the wiring passage 83a penetrates the peripheral wall portion of the motor housing portion 83 to connect the inside and the outside of the motor housing portion 83. The wiring path 83a is provided in a rear side (-X side) portion of the peripheral wall portion of the motor housing portion 83. The wiring passage 83a extends obliquely to one side (the Y direction) of the rear side from the inner peripheral surface of the motor housing portion 83. In the present embodiment, the wiring path 83a is provided on the connector mounting portion 83 d. The wiring passage 83a has an inner opening 83b opened in the inner peripheral surface of the motor housing portion 83 and an outer opening 83c opened in the distal end surface of the connector mounting portion 83 d. The 3 rd connector 100 is inserted into the outer opening 83 c.

The bus bar through hole 83e penetrates a rear side (-X side) portion of the peripheral wall portion of the motor housing portion 83 in the front-rear direction. The bus bar through hole 83e is located on the other axial side (+ Y side) of the wiring passage 83 a. The bus bar through hole 83e is provided in the axial center portion of the motor housing portion 83. Although illustration is omitted, the bus bar 111 passes through the bus bar through hole 83 e. The bus bar 111 passing through the bus bar through hole 83e protrudes to the outside of the housing 6 via the bus bar through hole 83 e.

As shown in fig. 4, the bearing holder 84 is fixed to an end portion of the motor housing portion 83 on one axial side (the (-Y side). The bearing holder 84 has a partition wall 84a, a fixing portion 84i, a holding portion 84c, an annular wall 84b, and a cylindrical portion 84 e. That is, the housing 6 includes a partition wall 84a, a fixing portion 84i, a holding portion 84c, an annular wall 84b, and a cylindrical portion 84 e. As shown in fig. 6, the bearing holder 84 has a plurality of ribs 84 j.

The partition wall portion 84a expands in the radial direction. As shown in fig. 4, the partition wall portion 84a covers the rotor body 24 and the stator 30 from one axial side (-Y side). In the present embodiment, the partition wall portion 84a partitions the interior of the motor housing portion 83 and the interior of a device housing portion 84h described later. The partition wall portion 84a is annular surrounding the motor axis J1. The partition wall 84a is provided with a wiring through hole 84d that penetrates the partition wall 84a in the axial direction. That is, the case body 81 has a wiring through hole 84 d. The wiring through hole 84d connects the inside of the motor housing portion 83 and the inside of a device housing portion 84h described later. As shown in fig. 6, in the present embodiment, the wiring through-hole 84d is provided in a portion of the partition wall portion 84a that is located obliquely above the rear side (-X side) of the motor axis J1. As shown in fig. 4, the wiring through-hole 84d axially faces the stator 30. More specifically, the wiring through-hole 84d axially faces the coil end 33 a.

The fixing portion 84i protrudes from the radially outer peripheral edge portion of the partition wall portion 84a to the other axial side (+ Y side). The fixing portion 84i is annular surrounding the motor axis J1. The fixing portion 84i is fixed to an end portion of the motor housing portion 83 on one axial side (the Y side) by a screw. Thereby, the bearing holder 84 is fixed to the motor housing portion 83.

The holding portion 84c holds the bearing 26. The holding portion 84c is provided at the radially inner peripheral edge portion of the partition wall portion 84 a. As shown in fig. 4 and 6, the holding portion 84c has a cylindrical shape protruding toward the other axial side (+ Y side). In the present embodiment, the holding portion 84c is cylindrical with the motor axis J1 as the center. The bearing 26 is fitted inside the holding portion 84 c.

As shown in fig. 3, the annular wall portion 84b protrudes from the partition wall portion 84a toward one axial side (the Y side). The annular wall portion 84b is annular surrounding the motor axis J1. The annular wall portion 84b is disposed radially inward of the radially outer peripheral edge of the partition wall portion 84 a. In the present embodiment, the device housing portion 84h is configured by the annular wall portion 84b and the partition wall portion 84 a. That is, the housing 6 has a device housing portion 84 h. The device housing portion 84h is located on one axial side of the motor housing portion 83. In the present embodiment, the device housing portion 84h is located on one axial side of the bearing 26. The device housing portion 84h houses the rotation detection device 70 described later.

As shown in fig. 6, the cylindrical portion 84e protrudes from the partition wall portion 84a to the other axial side (+ Y side). In the present embodiment, the cylindrical portion 84e is cylindrical with the center axis J1 as the center. The cylindrical portion 84e is located radially inward of the fixing portion 84i and radially outward of the holding portion 84 c. The cylindrical portion 84e is partially cut in the circumferential direction, for example.

The plurality of ribs 84j project from the partition wall portion 84a toward the other axial side (+ Y side). The rib 84j extends in the radial direction and connects the inner peripheral surface of the cylindrical portion 84e and the outer peripheral surface of the holding portion 84 c. The plurality of ribs 84j are provided at intervals in the circumferential direction.

The bearing holder 84 has a protective wall 84 g. That is, the case 6 has a protective wall 84 g. In the present embodiment, the protective wall 84g extends radially outward from the holding portion 84 c. More specifically, the protective wall portion 84g extends obliquely upward toward the rear side (-X side) from the end portion on the other side (+ Y side) in the axial direction of the holding portion 84 c. The protective wall portion 84g is a substantially rectangular wall portion when viewed in the axial direction. As shown in fig. 4, the protective wall portion 84g is located on one axial side (-Y side) of the rotor main body 24. The radially outer end of the protective wall 84g is located radially inward of the inner peripheral edge of the stator 30. Therefore, the protective wall 84g can be prevented from interfering with the stator 30. In the present embodiment, the protective wall portion 84g covers the radially inner end portion of the wiring through hole 84d from the other axial side. The protective wall 84g is located on the axial side of the stator 30.

The lid portion 85 is fixed to the surface of the bearing holder 84 on one axial side (Y side). The lid 85 is plate-shaped with its plate surface facing in the axial direction. The lid 85 closes the opening on one axial side of the device housing 84 h. The cover 85 covers an end portion of the shaft 21 on one axial side. The outer peripheral edge of the lid 85 is fixed to one axial end of the annular wall 84b by, for example, screws. The radial center portion 85a of the cover 85 bulges toward one axial side. In fig. 3, the lid 85 is not shown.

As shown in fig. 2 and 3, the inverter unit 8 is fixed to the rear side (-X side) of the case main body 81. The inverter unit 8 is located above the oil pump 96 and the oil cooler 97. The inverter unit 8 is located on the upper side of the differential axis J3. Although not shown, the inverter unit 8 is located above the axle 55 passing through the hole 82 c. As shown in fig. 1, the inverter unit 8 has an inverter case 8a and a control section 8 b.

The inverter case 8a houses the control unit 8b therein. As shown in fig. 3, a 4 th connector 104 is mounted to a front side (+ X side) portion of an end portion on one side (-Y side) in the axial direction of the inverter case 8 a.

The 4 th connector 104 protrudes obliquely forward from the inverter housing 8a toward one axial side (-Y side). The 4 th connector 104 is located on the upper side of the 3 rd connector 100 provided on the housing main body 81. The 4 th connector 104 is connected to the 3 rd connector 100 by a cable 103. In the present embodiment, the 3 rd connector 100, the 4 th connector 104, and the cable 103 are covered with the cover 99 shown in fig. 2 from the axial direction side. In fig. 3, the cover 99 is not shown.

The control unit 8b controls the motor 2 and the oil pump 96. As shown in fig. 1, the control unit 8b is housed inside the inverter case 8 a. The control unit 8b includes an inverter 8c that supplies power to the motor 2. Although not shown, the inverter 8c is electrically connected to the bus bar 111. Thereby, the inverter 8c supplies electric power to the coil 31 via the bus bar 111.

The drive device 1 is provided with an oil passage 90 through which the oil supply O circulates inside the casing 6. The oil passage 90 is a path of the oil O that is supplied from the oil reservoir P to the motor 2 and is guided to the oil reservoir P again. The oil passage 90 is provided across the inside of the housing main body 81 and the inside of the gear housing 82.

In addition, in the present specification, the "oil passage" refers to a path of oil. Therefore, the concept of the "oil passage" includes not only a "flow passage" for stably flowing oil in one direction but also a path for temporarily retaining oil and a path for dropping oil. The path for temporarily retaining oil includes, for example, a reservoir for storing oil.

The oil passage 90 has a 1 st oil passage 91 and a 2 nd oil passage 92. The 1 st oil passage 91 and the 2 nd oil passage 92 circulate oil O inside the casing 6, respectively. The 1 st oil passage 91 has an upward feed passage 91a, a shaft supply passage 91b, an in-shaft passage 91c, and an in-rotor passage 91 d. Further, a 1 st reservoir 93 is provided in a path of the 1 st oil path 91. The 1 st reservoir 93 is provided in the gear housing 82.

The upward feed path 91a is a path through which the oil O is fed from the oil reservoir P by the rotation of the ring gear 51 of the differential device 5 and is received by the 1 st reservoir 93. The 1 st reservoir 93 is open on the upper side. The 1 st reservoir 93 receives the oil O sent up by the ring gear 51. Further, the 1 st reservoir 93 receives the oil O sent upward from the 2 nd gear 42 and the 3 rd gear 43 in addition to the oil O sent upward from the ring gear 51, for example, when the oil level S of the oil reservoir P is high immediately after the motor 2 is driven.

The shaft supply path 91b guides the oil O from the 1 st reservoir 93 to the hollow portion 22 of the shaft 21. The shaft inner path 91c is a path through which the oil O passes in the hollow portion 22 of the shaft 21. The rotor inner path 91d is a path through which the shaft 21 passes from the communication hole 23 to the inside of the rotor body 24 and scatters toward the stator 30.

In the in-shaft path 91c, a centrifugal force is applied to the oil O inside the rotor 20 in accordance with the rotation of the rotor 20. Thereby, the oil O continuously scatters from the rotor 20 to the outside in the radial direction. Further, as the oil O is scattered, the path inside the rotor 20 is at a negative pressure, and the oil O stored in the 1 st reservoir 93 is sucked into the rotor 20, and the path inside the rotor 20 is filled with the oil O.

The oil O reaching the stator 30 takes heat away from the stator 30. The oil O that has cooled the stator 30 drips downward and is accumulated in the lower region in the casing main body 81. The oil O accumulated in the lower region of the housing main body 81 moves to the gear housing 82 through the partition wall opening 68 provided in the partition wall 61 c. As described above, the 1 st oil path 91 supplies the supply oil O to the rotor 20 and the stator 30.

In the 2 nd oil passage 92, the oil O is lifted from the oil reservoir P to the upper side of the stator 30 and supplied to the stator 30. That is, the 2 nd oil passage 92 supplies the oil O to the stator 30 from the upper side of the stator 30. Oil pump 96, oil cooler 97, and 2 nd reservoir 10 are provided in 2 nd oil passage 92. The 2 nd oil passage 92 has a 1 st flow passage 92a, a 2 nd flow passage 92b, and a 3 rd flow passage 92 c.

The 1 st flow path 92a, the 2 nd flow path 92b, and the 3 rd flow path 92c are provided in a wall portion of the casing 6. The 1 st flow path 92a connects the oil reservoir P and the oil pump 96. The 2 nd flow path 92b connects the oil pump 96 and the oil cooler 97. The 3 rd flow path 92c extends upward from the oil cooler 97. The 3 rd flow path 92c is provided in a wall portion of the casing main body 81. Although not shown, the 3 rd flow path 92c has a supply port that opens into the casing main body 81 above the stator 30. The supply port supplies oil O to the inside of the case main body 81.

The oil pump 96 is an electric pump driven by electricity. The oil pump 96 feeds the oil O stored in the casing 6 to the motor 2. In the present embodiment, the oil pump 96 sucks the oil O from the oil reservoir P through the 1 st flow path 92a, and supplies the oil O to the motor 2 through the 2 nd flow path 92b, the oil cooler 97, the 3 rd flow path 92c, and the 2 nd reservoir 10.

The oil cooler 97 cools the oil O contained inside the housing 6. More specifically, oil cooler 97 cools oil O passing through 2 nd oil passage 92. The 2 nd flow path 92b and the 3 rd flow path 92c are connected to the oil cooler 97. The 2 nd flow path 92b and the 3 rd flow path 92c are connected via an internal flow path of the oil cooler 97. The internal flow passage of the oil cooler 97 is a part of the cooling flow passage 98 through which the cooling water W cooled by the radiator, not shown, flows. The oil O passing through the inside of the oil cooler 97 is cooled by heat exchange with the cooling water W passing through the internal flow passage of the oil cooler 97.

The cooling passage 98 includes a passage provided in the inverter case 8 a. The inverter 8c is cooled by the cooling water W flowing through the flow path provided in the inverter case 8 a. The cooling passage 98 includes a pipe 98a, and the pipe 98a connects a passage provided in the inverter case 8a and an internal passage of the oil cooler 97. In fig. 3, the piping 98a is not shown.

Reservoir 210 forms a portion of 2 nd oil path 92. The 2 nd reservoir 10 is located inside the housing body 81. The 2 nd reservoir 10 is located at an upper side of the stator 30. The 2 nd reservoir 10 is supported from the lower side by the stator 30 and is provided on the motor 2. The 2 nd reservoir 10 is made of, for example, a resin material.

In the present embodiment, the 2 nd reservoir 10 has a gutter shape opening to the upper side. Reservoir 2 stores oil O. In the present embodiment, the 2 nd reservoir 10 stores the oil O supplied into the casing main body 81 through the 3 rd flow path 92 c. The 2 nd reservoir 10 has a supply port that supplies oil O to the coil ends 33a, 33 b. Thereby, the oil O stored in the 2 nd reservoir 10 can be supplied to the stator 30.

The oil O supplied from the 2 nd reservoir 10 to the stator 30 drops downward and accumulates in the lower region in the housing main body 81. The oil O accumulated in the lower region of the housing main body 81 moves to the gear housing 82 through the partition wall opening 68 provided in the partition wall 61 c. As described above, the 2 nd oil passage 92 supplies the oil O to the stator 30.

As shown in fig. 4, the drive device 1 further includes: a rotation detecting device 70 capable of detecting rotation of the rotor 20; and a wiring assembly 101 connected to the rotation detecting device 70. The rotation detection device 70 is housed inside the device housing portion 84 h. In the present embodiment, the rotation detecting device 70 is located on one axial side (-Y side) of the bearing 26. In the present embodiment, the rotation detecting device 70 is a resolver. The rotation detecting device 70 is, for example, a vr (variable recovery) type resolver. The rotation detecting device 70 includes a resolver rotor 71, a resolver stator 72, a fixing member 78, and a cover 77.

The resolver rotor 71 is annular surrounding the motor axis J1. The resolver rotor 71 has a plate shape with a plate surface facing in the axial direction. The resolver rotor 71 is fitted to an end portion of the shaft 21 on one axial side (the (-Y) side). In the present embodiment, the resolver rotor 71 is fixed by a fixing member 78.

The fixing member 78 is an annular member, and is press-fitted into a portion located on one axial side of the resolver rotor 71 at the end on one axial side (Y side) of the shaft 21. The fixing member 78 fixes the resolver rotor 71 by pressing the resolver rotor 71 from the one axial side toward the step portion 21 b. Thereby, the resolver rotor 71 is fixed to a portion of the shaft 21 that protrudes into the device housing portion 84 h. Since the fixing member 78 can be press-fitted into the shaft 21 to fix the resolver rotor 71, for example, it is not necessary to provide a screw portion or the like on the outer peripheral surface of the shaft 21, and the manufacturing cost of the drive device 1 can be reduced. The outer diameter of the fixing member 78 is smaller than the outer diameter of the resolver rotor 71.

The resolver stator 72 is located radially outside the resolver rotor 71. The resolver stator 72 is annular and surrounds the resolver rotor 71. The resolver stator 72 has a resolver stator core 73, an insulator 74, and a plurality of resolver coils 75. The resolver stator core 73 has a resolver core back 73a and a plurality of resolver teeth 73 b.

The resolver core back 73a has an annular shape centered on the motor axis J1. As shown in fig. 3, the resolver core back 73a has a plurality of fixing hole portions 73c in the radial outer peripheral edge portion. The plurality of fixing holes 73c are arranged at intervals in the circumferential direction. The fixing hole 73c is an elongated hole extending in the circumferential direction. The resolver core back 73a is fixed to the bearing holder 84 by screwing a screw passing through the fixing hole 73c from one axial side (-Y side) into an unillustrated female screw hole provided in the partition wall 84 a. Thereby, the resolver stator 72 is fixed to the bearing holder 84.

As shown in fig. 4, the plurality of resolver teeth 73b extend radially inward from the resolver core back 73 a. Although not shown, the plurality of resolver teeth 73b are arranged at equal intervals in the circumferential direction for one rotation. The radially inner end of the resolver tooth 73b faces the radially outer surface of the resolver rotor 71 with a gap therebetween.

The insulator 74 is attached to the resolver stator core 73. The insulator 74 is made of, for example, resin. The plurality of resolver coils 75 are attached to the plurality of resolver teeth 73b via the insulator 74. The cover 77 is fixed to one axial side (-Y side) of the resolver stator 72. The cover 77 covers the resolver coil 75 from one axial side.

The rotation detecting device 70 has a 2 nd connector 76. In the present embodiment, the 2 nd connector 76 is provided at the radially outer edge portion in the resolver stator 72. The 2 nd connector 76 protrudes toward the other axial side (+ Y side). At least a part of the 2 nd connector 76 is positioned inside the wiring through hole 84 d. The other axial end of the 2 nd connector 76 is located radially outward of the holding portion 84 c. The 2 nd connector 76 is located on one axial side (-Y side) of the rotor main body 24. The protective wall portion 84g is located between the 2 nd connector 76 and the rotor body 24 in the axial direction. In the present embodiment, the entire 2 nd connector 76 is covered with the protective wall portion 84g from the other axial side.

In the present embodiment, the 2 nd connector 76 is a male connector. The 2 nd connector 76 has a barrel portion 76a and a terminal portion 76 b. The cylindrical portion 76a has a cylindrical shape protruding toward the other axial side (+ Y side). The cylindrical portion 76a has an opening 76c that opens on the other axial side. In the present embodiment, the cylindrical portion 76a is made of resin that is integrally molded with the insulator 74. Terminal portion 76b is held by cylindrical portion 76 a. Terminal portion 76b extends in the axial direction and is exposed inside cylindrical portion 76 a. Although not shown, the terminal portion 76b is electrically connected to the resolver coil 75.

When the resolver rotor 71 rotates together with the shaft 21, an induced voltage corresponding to the circumferential position of the resolver rotor 71 is generated in the resolver coil 75 of the resolver stator 72. The rotation detecting device 70 can detect rotation of the resolver rotor 71 and the shaft 21 based on a change in the induced voltage generated in the resolver coil 75. Thereby, the rotation detecting device 70 can detect the rotation of the rotor 20.

The wiring module 101 transmits the detection result of the rotation detection device 70 to the control unit 8 b. More specifically, the wiring assembly 101 transmits a signal of the induced voltage generated in the resolver coil 75 to the control unit 8 b. The wiring member 101 extends from the rotation detecting device 70 to the wiring passage 83a through the inside of the motor housing portion 83. In the present embodiment, the wiring member 101 extends from the 2 nd connector 76 into the motor housing portion 83 through the wiring through hole 84 d. Although not shown, the wiring assembly 101 is connected to the 3 rd connector 100 inside the wiring passage 83 a. The detection result of the rotation detection device 70 is transmitted to the control unit 8b via the wiring assembly 101, the 3 rd connector 100, the cable 103, and the 4 th connector 104 in this order. In the present embodiment, the wiring module 101 includes the 1 st wiring 101a, the 2 nd wiring 101b, the 1 st connector 101c, and the relay connectors 101d and 101 e.

In the present embodiment, the 1 st connector 101c is a female connector. The 1 st connector 101c is connected to the 2 nd connector 76 from the other axial side (+ Y side). More specifically, the 1 st connector 101c is inserted into the cylindrical portion 76a from the other axial side and connected to the 2 nd connector 76. Although not shown, the 1 st connector 101c has a terminal portion electrically connected to the terminal portion 76b of the 2 nd connector 76.

The 1 st wiring 101a is a wiring extending from the 1 st connector 101 c. The 1 st wiring 101a extends from the 1 st connector 101c to the other axial side (+ Y side), and then bends outward in the radial direction along the protective wall portion 84g and extends into the motor housing portion 83. A relay connector 101d is provided at an end of the 1 st wiring 101a opposite to the side where the 1 st connector 101c is provided. That is, the 1 st wiring 101a is a connector-equipped wiring having connectors provided at both ends. The relay connector 101d is, for example, a male connector.

The 2 nd wiring 101b is a wiring connected to the 1 st wiring 101a and passing through the wiring via 83 a. The 2 nd wiring 101b is inserted into the wiring passage 83a from the inside of the motor housing portion 83 through the inner opening portion 83 b. A relay connector 101e is provided at an end of the 2 nd wiring 101b located inside the motor housing portion 83. The relay connector 101e is connected to the relay connector 101 d. Thereby, the 1 st wiring 101a and the 2 nd wiring 101b are connected via the relay connectors 101d and 101 e. The relay connector 101e is, for example, a female connector. Although not shown, a connector connected to the 3 rd connector 100 is provided at an end portion of the 2 nd wiring 101b located inside the wiring passage 83 a. That is, the 2 nd wiring 101b is a connector-equipped wiring having connectors provided at both ends.

The relay connectors 101d and 101e connecting the 1 st wire 101a and the 2 nd wire 101b are held by the bus bar holder 110. Therefore, the wiring assembly 101 can be stably held in the housing main body 81. Further, only one of the relay connector 101d and the relay connector 101e may be directly held by the bus bar holder 110, and the other may be indirectly held by the bus bar holder 110 by being connected to one of the relay connectors. The structure of the bus bar holder 110 for holding the relay connectors 101d and 101e is not particularly limited. For example, a hook-shaped holding portion, not shown, may be provided in the bus bar holder 110, and the relay connectors 101d and 101e may be held by being hooked inside the hook-shaped holding portion.

The 1 st wiring 101a is disposed in the housing main body 81 together with the rotation detecting device 70 in a state of being connected to the rotation detecting device 70, for example. At this time, the relay connector 101d provided in the 1 st wiring 101a is inserted from the inside of the device housing portion 84h into the inside of the motor housing portion 83 through the wiring through hole 84 d.

On the other hand, the 2 nd wiring 101b is inserted into the wiring passage 83a from the outside of the housing 6 when the 3 rd connector 100 is mounted on the connector mounting portion 83d in a state of being connected to the 3 rd connector 100 not shown. At this time, the relay connector 101e is inserted into the motor housing 83 through the inner opening 83b of the wiring passage 83 a. The relay connector 101d and the relay connector 101e inserted inside are connected inside the motor housing portion 83, and held by the bus bar holder 110.

According to the present embodiment, the rotation detecting device 70 has the 2 nd connector 76, and the 1 st connector 101c of the wiring member 101 is connected to the 2 nd connector 76 from the other axial side (+ Y side). Therefore, the wiring assembly 101 connected to the rotation detecting device 70 is easily drawn out from the 2 nd connector 76 toward the other side in the axial direction, and easily passes through the wiring passage 83a provided in the motor housing portion 83. This makes it possible to easily route the wiring assembly 101 from the rotation detecting device 70 to the wiring path 83 a. Therefore, compared to a case where the wiring block 101 is connected to the rotation detecting device 70 from the radially outer side, for example, the wiring block 101 connected to the rotation detecting device 70 can be prevented from being complicated in winding. Therefore, increase in man-hours and time required for assembly of the drive device 1 can be suppressed.

Further, according to the present embodiment, the housing 6 has the protective wall portion 84g, and the protective wall portion 84g is located between the 2 nd connector 76 and the rotor body 24 in the axial direction. Therefore, the movement of the wiring assembly 101 connected to the 2 nd connector 76 from the other side (+ Y side) in the axial direction to the other side in the axial direction can be suppressed by the protective wall portion 84g, and the contact of the wiring assembly 101 with the rotor body 24 can be suppressed. This can suppress damage to the wiring assembly 101. In the present embodiment, the movement of the 1 st wire 101a to the other side in the axial direction can be suppressed by the protective wall portion 84g, and the contact of the 1 st wire 101a with the rotor body 24 can be suppressed. This can suppress damage to the 1 st wiring 101 a.

In addition, according to the present embodiment, the entire 2 nd connector 76 is covered with the protective wall portion 84g from the other axial side (+ Y side). Therefore, the wiring assembly 101 can be further prevented from contacting the rotor body 24, and damage to the wiring assembly 101 can be further prevented.

In addition, according to the present embodiment, the protective wall portion 84g extends radially outward from the holding portion 84 c. Therefore, the movement of the wiring member 101 to the other axial side (+ Y side) can be suppressed by the protective wall portion 84g, and the movement of the wiring member 101 to the radially inner side can be suppressed by the holding portion 84 c.

In addition, according to the present embodiment, the case 6 has a partition wall portion 84a, and the partition wall portion 84a partitions the inside of the motor housing portion 83 and the inside of the device housing portion 84 h. The wiring member 101 extends from the 2 nd connector 76 into the motor housing portion 83 through the wiring through hole 84d provided in the partition wall portion 84 a. Therefore, the wiring member 101 can be guided through the wiring through hole 84d, and the position where the wiring member 101 is drawn out inside the motor housing portion 83 can be determined. This makes it easier to route the wiring module 101.

In the present embodiment, the wiring through-hole 84d is axially opposed to the stator 30. Therefore, the wiring assembly 101 drawn into the motor housing 83 through the wiring through hole 84d can be drawn to the vicinity of the stator 30. This makes it easy to wind the wiring assembly 101 around the bus bar holder 110 supported by the stator 30. Specifically, in the present embodiment, the 1 st wire 101a is easily routed to the bus bar holder 110. This makes it easy to hold the relay connector 101d provided in the 1 st wiring 101a in the bus bar holder 110.

In the present embodiment, since the oil O is supplied to the inside of the shaft 21, the oil O flows into the device housing portion 84h from the opening on one axial side (-Y side) of the hollow portion 22 of the shaft 21. Therefore, the oil O comes into contact with the rotation detecting device 70. In contrast, in the present embodiment, the rotation detecting device 70 is a resolver. The resolver is less susceptible to the influence of the oil O than other sensors and the like capable of detecting rotation. Therefore, even if the oil O is supplied to the inside of the device housing portion 84h, the occurrence of a failure in the rotation detecting device 70 can be suppressed.

The present invention is not limited to the above embodiment, and other configurations may be adopted. The fixing member for fixing the resolver rotor may be a nut or the like. The type of the rotation detecting device is not particularly limited as long as the rotation of the rotor can be detected. The rotation detecting device may be a device having a magnetic sensor such as a hall element or a magnetoresistive element. The 2 nd connector of the rotation detecting device may be a female type. In this case, the 1 st connector of the wiring assembly is of a male type. The wiring module connected to the 2 nd connector may not pass through the inside of the motor housing portion. For example, in the above embodiment, the wiring assembly 101 may be drawn out from the rotation detecting device 70 to the outside of the housing 6 through the lid 85 without passing through the inside of the motor housing 83.

The relay connector may not be held by the bus bar holder. The relay connector may be held by a member other than the bus bar holder such as the stator core, or may not be held. In addition, the wiring member may have a 3 rd wiring connected to the 2 nd wiring in addition to the 1 st wiring and the 2 nd wiring. The wiring assembly may not have the 2 nd wiring. In this case, no relay connector is provided, and the 1 st wiring extends to the wiring path. In this case, specifically, the driving device may be configured as a modification shown in fig. 7.

As shown in fig. 7, in the present modification, the 1 st wire 201a of the wire assembly 201 extends from the 1 st connector 101c to the other axial side (+ Y side), and then bends outward in the radial direction along the protective wall portion 84g and extends into the motor housing portion 83. Next, the 1 st wiring 201a is inserted into the wiring passage 83a from the inside of the motor housing portion 83 through the inner opening portion 83 b. Thus, in the present modification, the 1 st wiring 201a passes through the wiring via 83 a.

In the present modification, the bus bar holder 210 has a holder body 210a and a wiring holding portion 210 b. The holder main body 210a holds the bus bar 111. The holder body 210a has, for example, the same structure as the bus bar holder 110 of the above-described embodiment except for the portions holding the relay connectors 101d and 101 e.

The wiring holding portion 210b protrudes from the holder body 210a toward one axial side (the Y side), for example. The wiring holding portion 210b is, for example, hook-shaped. The portion of the 1 st wiring 201a located inside the motor housing portion 83 is hooked on the hook-shaped wiring holding portion 210 b. Thus, the wiring holding portion 210b holds the 1 st wiring 201 a. According to this configuration, the 2 nd wiring does not need to be provided, and the number of wirings can be reduced. Therefore, the number of steps for connecting the wirings can be reduced. Further, since the 1 st wiring 201a is held by the wiring holding portion 210b, the 1 st wiring 201a can be suppressed from swinging loosely in the case 6. Thus, even if the entire length of the 1 st wiring 201a is increased as compared with the case where the 2 nd wiring is provided, the 1 st wiring 201a can be prevented from contacting the rotor 20 and the like. Therefore, the occurrence of a failure such as disconnection of the 1 st wiring 201a can be suppressed.

The wiring holding portion 210b may have any shape or any structure as long as it can hold the 1 st wiring 201 a. For example, the wiring holding portion 210b may have a hole through which the 1 st wiring 201a passes. In this case, the 1 st wiring 201a is held by the wiring holding portion 210b by passing the 1 st wiring 201a through the hole. For example, the wiring holding portion 210b may have a groove into which the 1 st wiring 201a is fitted. In this case, the 1 st wiring 201a is held by the wiring holding portion 210b by fitting the 1 st wiring 201a into the groove.

The structure of the protective wall portion is not particularly limited as long as it is located between the 2 nd connector and the rotor body in the axial direction. The protective wall portion may cover only a part of the 2 nd connector from the other axial side. The protective wall portion may also be provided on the partition wall portion. The partition wall portion may not be provided. The device housing section for housing the rotation detection device may have any configuration as long as it is located on one axial side of the motor housing section. The device housing portion may be provided on the other axial side of the bearing holder. In this case, for example, in the above embodiment, the rotation detecting device 70 is located on the other axial side than the bearing 26. In this case, the resolver rotor 71 is fixed to a portion of the shaft 21 between the portion supported by the bearing 26 and the axial direction of the portion to which the rotor main body 24 is fixed.

The respective structures described in this specification can be appropriately combined within a range not contradictory to each other.