Parking lock device and motor unit having the same

Abstract

The present application provides a parking lock device and a motor unit having the same. The parking lock device has a parking gear that rotates about a first rotation axis, a parking claw that has a protruding portion engaged with the parking gear and rotates about a second rotation axis along the first rotation axis, a parking lever that has a cam member in contact with the parking claw and a lever main body through which the cam member is inserted, a sleeve member that has one end of the lever main body inserted in a through hole, a flange that supports the other end of the lever main body, and an actuator that moves the parking lever by rotating the flange. The parking claw rotates between a first position in which the protruding portion is engaged with the parking gear and a second position in which the protruding portion is away from the parking gear.

Description

[0001] This application is a divisional application of the application for patent application No. 202011030600.4, filed on September 27, 2020, entitled "Parking lock device and motor unit having the same". TECHNICAL FIELD

[0002] The present application relates to a parking lock device and a motor unit having the same. BACKGROUND

[0003] A parking lock device mounted on a vehicle is provided to prevent the wheels from rotating unintentionally when the shift lever is shifted to the parking position or when the parking button is manually operated. For example, when the shift lever is shifted to the parking position, an actuator is driven. The actuator rotates a flange to move a parking lever, thereby causing a cam member of the parking lever to slide with a parking pawl. As a result, the parking pawl rotates. When a protruding portion of the parking pawl enters a recessed portion of a parking gear, the parking gear is locked. At the same time, a drive gear provided coaxially with the parking gear is also locked. In this case, an axle shaft connected to the drive gear via other gears and shafts cannot rotate. Therefore, for example, when the vehicle is parked on a slope and the parking lock device is operated, the wheels do not rotate, and the vehicle does not slide backward on the slope. Such a parking lock device is disclosed in, for example, Patent Literature 1.

[0004] Patent Literature 1: Japanese Patent Application Publication No. 2011-143893

[0005] In the parking lock device, depending on the stop position of the rotating parking gear, sometimes when the parking pawl rotates, the protruding portion of the parking pawl does not enter the recessed portion of the parking gear, but collides with the protruding portion of the parking gear. In this case, the parking pawl is impacted. This impact is transmitted from the parking pawl to the parking lever, and further to the actuator that drives the parking lever. As a result, the components constituting the parking lock device, including the actuator, can be damaged by the above impact. SUMMARY

[0006] The present application is made in view of the above-described problems, and aims to provide a parking lock device and a motor unit having the same, which can reduce damage to the components caused by the impact generated when the parking pawl collides with the parking gear during rotation of the parking pawl.

[0007] The parking locking device exemplified by the present invention comprises: a parking gear that rotates about a first rotation axis; a parking pawl having a protrusion that meshes with the parking gear and rotating about a second rotation axis along the first rotation axis; a parking lever having a cam member that contacts the parking pawl and a lever body through which the cam member is inserted; a sleeve member having a through hole extending in a direction along the second rotation axis and having one end of the lever body of the parking lever inserted in the through hole; a flange supporting the other end of the lever body of the parking lever; and an actuator that drives the flange by rotation to move the parking lever in a direction transverse to the through hole, wherein the parking pawl rotates between a first position where the protrusion meshes with the parking gear and a second position where the protrusion is away from the parking gear by the movement of the cam member as the parking lever moves, and the through hole of the sleeve member is an elongated hole when viewed from the direction along the second rotation axis.

[0008] According to the above structure, the damage to the components caused by the impact of the collision between the parking claw and the parking gear when the parking claw rotates can be reduced. Attached Figure Description

[0009] Figure 1 This is a perspective view showing the appearance of a motor unit according to one embodiment of the present invention.

[0010] Figure 2 This is a conceptual diagram of a motor unit.

[0011] Figure 3 This is a perspective view showing the schematic structure of the parking locking device when the parking claw is in the first position.

[0012] Figure 4 Looking from the +Y direction toward the -Y direction Figure 3 The front view of the parking lock device.

[0013] Figure 5 Looking from the -X direction toward the +X direction Figure 3 Side view of the parking lock device.

[0014] Figure 6 It is Figure 3 A magnified perspective view of the main parts of the parking locking device.

[0015] Figure 7 This is a perspective view showing the structure of the parking locking device when the parking claw is in the second position.

[0016] Figure 8 Looking from the +Y direction toward the -Y direction Figure 7front view of the parking lock device when viewed from the +X direction.

[0017] Figure 9 is a side view of the parking lock device when viewed from the -X direction toward the +X direction Figure 7

[0018] Figure 10 is a perspective view of the parking lock device in a state where the protruding portion of the parking pawl collides with the convex portion of the parking gear.

[0019] Figure 11 is a front view of the parking lock device when viewed from the -Y direction toward the +Y direction. Figure 10

[0020] Figure 12 is a side view of the parking lock device when viewed from the -X direction toward the +X direction. Figure 10

[0021] Figure 13 is a perspective view of the parking lever when the parking pawl is in the second position.

[0022] Figure 14 is a perspective view of the parking lever when the parking pawl is in the first position.

[0023] Figure 15 is a perspective view of the sleeve member when viewed from the -Y direction side.

[0024] Figure 16 is a perspective view of the sleeve member in a state where the positioning pin and the fixing member are installed.

[0025] Figure 17 is a perspective view in which the inside of the housing in which the sleeve member is fixed is enlarged.

[0026] Figure 18 is a perspective view in which the inside of the housing of the parking lock device is shown in a state where the sleeve member is detached. Figure 17

[0027] Figure 19 is a perspective view of the flange in a state where the other end portion of the parking lever is supported.

[0028] Figure 20 is a front view of the support plate of the flange when viewed from the +X direction.

[0029] Figure 21 is a bottom view showing a state of the parking lever when the parking pawl is in the first position, as viewed from the -Z direction side.

[0030] Figure 22 is a bottom view showing a state of the parking lever when the parking pawl is in the second position, as viewed from the -Z direction side.

[0031] ​​​​Figure 23 is a perspective view showing a schematic configuration of a parking lock device of a modification example of the claw force applying member.

[0032] Figure 24 (a) of FIG. 1 is an explanatory view of a modification example of the claw force applying member installed to the housing, Figure 24 (b) of FIG. 1 is an explanatory view showing a state where the modification example of the claw force applying member is being installed to the housing, Figure 24 (c) of FIG. 1 is an explanatory view showing a state where the claw force applying member shown in the present embodiment is being installed to the housing.

[0033] Explanation of Reference Numerals

[0034] 1: motor unit; 2: motor; 4: speed reducer; 5: differential device; 6: housing; 7: parking lock device; 42: second gear (intermediate gear); 55: axle; 71: parking gear; 72: parking claw; 72a: protrusion portion; 72b: cam sliding portion; 73: parking lever; 73A: one end portion; 73B: other end portion; 731: cam member; 731a: conical frustum cylindrical portion; 731al: tapered surface; 731b: cylindrical portion; 731bl: outer peripheral surface; 732: lever main body; 74: sleeve member; 74a: through hole; 74bl: cam receiving portion; 74bl: recessed surface; 75: flange; 752a: opening portion; 77: actuator; 101: claw force applying member; 102: rotation preventing portion; 121: positioning pin; 122: fixing member; J4: intermediate axis (first rotation axis); J6: rotation axis (second rotation axis); T: gap. DETAILED DESCRIPTION

[0035] Hereinafter, a motor unit 1 of an example embodiment of the present application will be described in detail with reference to the drawings. In addition, hereinafter, the direction of gravity will be defined and described based on the positional relationship in the case where the motor unit 1 is mounted on a vehicle located on a horizontal road surface. In addition, 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 indicates the vertical direction (i.e., the up-down direction), the +Z direction is the upper side (the opposite side of the direction of gravity), and the -Z direction is the lower side (the direction of gravity). In addition, the X-axis direction is a direction perpendicular to the Z-axis direction, indicates the front-rear direction of the vehicle on which the motor unit 1 is mounted, the +X direction is the front of the vehicle, and the -X direction is the rear of the vehicle. In addition, sometimes the +X direction can be the rear of the vehicle, and the -X direction can be the front of the vehicle. The Y-axis direction is a direction perpendicular to both the X-axis direction and the Z-axis direction, and is the width direction (the left-right direction) of the vehicle.

[0036] In the following description, unless specifically stated otherwise, the direction parallel to the motor axis J2 of the motor 2 possessed by the motor unit 1 (Y-axis direction) will be simply referred to as "axial direction", the radial direction centered on the motor axis J2 will be simply referred to as "radial direction", and the circumferential direction centered on the motor axis J2, that is, the direction around the motor axis J2 will be simply referred to as "circumferential direction". However, the "parallel direction" described above also includes a substantially parallel direction. Also, the "perpendicular direction" described above also includes a substantially perpendicular direction.

[0037] Also, in the present specification, "sliding" refers to sliding while being in contact, or moving while sliding.

[0038] Figure 1 is a perspective view showing the outer appearance of the motor unit 1 of one embodiment. Figure 2 is a conceptual diagram of the motor unit 1. The motor unit 1 is mounted on a vehicle that uses at least a motor as a power source, such as a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHV), an electric vehicle (EV), or the like. The motor unit 1 has a motor 2, a reduction device 4, a differential device 5, a housing 6, a parking lock device 7, an inverter unit 8, and an oil passage 90. Also, Figure 2 is a conceptual diagram, and the arrangement and the size of each portion are not necessarily the same as those of the actual motor unit 1. Also, for convenience, in Figure 2 the illustration of the inverter unit 8 is omitted.

[0039] The outline of each portion of the motor unit 1 is described below. The motor 2 has a rotor 20 and a stator 30. The rotor 20 rotates around the motor axis J2 in the horizontal direction. The stator 30 is located radially outward of the rotor 20. The reduction device 4 is connected to the rotor 20 of the motor 2. The differential device 5 is connected to the motor 2 via the reduction device 4. A housing space 80 that accommodates the motor 2, the reduction device 4, and the differential device 5 is provided inside the housing 6.

[0040] The parking lock device 7 operates in conjunction with the operation of a shift lever or a parking button, and prevents the rotation of a wheel. For example, in the case where the vehicle is parked on a slope, when the driver of the vehicle displaces the shift lever to the parking position or presses the parking button, the parking lock device 7 operates to lock the wheel. Thus, it is possible to prevent the vehicle from moving backward down the slope. The inverter unit 8 is electrically connected to the motor 2, and controls the supply of electric current to the motor 2.

[0041] The oil passage 90 is a path of the oil O that supplies the oil O stored in the region on the lower side in the vertical direction of the accommodation space 80 to the motor 2. The oil O is used for lubricating the reduction device 4 and the differential device 5, and for cooling the motor 2. The oil O has a function as a lubricating oil and a cooling oil. Therefore, as the oil O, it is preferable to use an oil equivalent to an automatic transmission fluid (ATF) having a lower viscosity. The oil passage 90 has a first oil passage 91 and a second oil passage 92.

[0042] In addition, in the present specification, the "oil passage" refers to a path of the oil O that circulates in the accommodation space 80. Therefore, the "oil passage" is a concept that includes not only a "flow path" that forms a stable flow of the oil in one direction, but also a path in which the oil temporarily stays (for example, a reservoir) and a path in which the oil drips.

[0043] Hereinafter, the details of each part of the motor unit 1 will be described.

[0044] <1. Housing>

[0045] The housing 6 holds the motor 2, the reduction device 4, and the differential device 5 in the accommodation space 80. The housing 6 has a partition wall 61c. The accommodation space 80 of the housing 6 is divided by the partition wall 61c into a motor chamber 81 and a gear chamber 82. The motor 2 is housed in the motor chamber 81. The reduction device 4 and the differential device 5 are housed in the gear chamber 82. In addition, a part of the parking lock device 7 is also housed in the gear chamber 82.

[0046] An oil storage portion P in which the oil O is stored is provided in the region on the lower side of the accommodation space 80. In the present embodiment, the bottom portion 81a of the motor chamber 81 is located at a position on the upper side than the bottom portion 82a of the gear chamber 82. On the other hand, a partition wall opening 68 is provided in the region on the lower side of the partition wall 61c. The partition wall opening 68 communicates the motor chamber 81 and the gear chamber 82. The oil O stored in the region on the lower side of the motor chamber 81 moves to the gear chamber 82 via the partition wall opening 68. Therefore, in the present embodiment, the oil storage portion P is provided in the region on the lower side of the gear chamber 82.

[0047] A part of the differential device 5 is immersed in the oil storage portion P. The oil O stored in the oil storage portion P is lifted by the operation of the differential device 5, a part of which is supplied to the first oil passage 91, and a part of which is diffused into the gear chamber 82. The oil O diffused into the gear chamber 82 is supplied to each gear of the reduction device 4 and the differential device 5 in the gear chamber 82, and makes the oil O spread over the tooth surfaces of the gears. The oil O used for the reduction device 4 and the differential device 5 drips and is recovered by the oil storage portion P located on the lower side of the gear chamber 82. The capacity of the oil storage portion P of the accommodation space 80 is set to a degree that a part of the bearings of the differential device 5 is immersed in the oil O at the time when the motor unit 1 is stopped.

[0048] The housing 6 is, for example, an aluminum die cast. The housing 6 constitutes an outer frame of the motor unit 1. The housing 6 has a motor housing portion 61, a gear housing portion 62, and a closing portion 63. The motor housing portion 61 is located between the gear housing portion 62 and the closing portion 63. The closing portion 63 is fixed to the motor housing portion 61, and closes an opening of the motor housing portion 61 which is a cylinder.

[0049] On the partition wall 61c of the motor housing portion 61, in addition to the above-described partition wall opening 68, a through-insertion hole 61f is provided through which the shaft 21 of the motor 2 is inserted. Further, the motor housing portion 61 has a protruding plate portion 61d. The protruding plate portion 61d is disposed protruding downward from the partition wall 61c. On the protruding plate portion 61d, a first axle passing hole 61e is provided through which a drive shaft (not shown) that supports a wheel passes.

[0050] The gear housing portion 62 is fixed to the motor housing portion 61, and constitutes a gear chamber 82 that houses the reduction device 4 and the like. The gear housing portion 62 is provided with a second axle passing hole 62e. The second axle passing hole 62e overlaps the first axle passing hole 61e when viewed in the axial direction of the axle 55.

[0051] The gear housing portion 62 has a first reservoir (reservoir) 93 and a shaft supply flow path 94. The first reservoir 93 receives oil O raised by the differential device 5. The shaft supply flow path 94 is a flow path that supplies the oil O received by the first reservoir 93 to the inside of the hollow portion 22 of the shaft 21.

[0052] <2. Reduction Device>

[0053] The reduction device 4 has a function of reducing the rotational speed of the motor 2, and increasing the torque output from the motor 2 in accordance with the reduction ratio. The reduction device 4 transmits the torque output from the motor 2 to the differential device 5.

[0054] The reduction device 4 has a first gear (motor gear) 41, a second gear (intermediate gear) 42, a third gear (final drive gear) 43, and a gear shaft 45. The gear ratio of each gear and the number of gears and the like can be variously changed in accordance with a desired reduction ratio. The reduction device 4 is a parallel shaft type reduction device in which the shaft cores of the respective gears are arranged in parallel.

[0055] The first gear 41 is provided to the outer peripheral surface of the shaft 21 of the motor 2. The first gear 41 rotates together with the shaft 21 with the motor axis J2 as the center. The gear shaft 45 extends along an intermediate axis J4 that is parallel to the motor axis J2. The gear shaft 45 is in a cylindrical shape with the intermediate axis J4 as the center, and rotates with the intermediate axis J4 as the center.

[0056] The second gear 42 and the third gear 43 are provided to the outer peripheral surface of the gear shaft 45. The second gear 42 and the third gear 43 are connected via the gear shaft 45 and rotate around the intermediate axis J4, respectively. The second gear 42 is engaged with the first gear 41. The third gear 43 is engaged with the ring gear 51 of the differential 5. The third gear 43 is located on the partition wall 61c side with respect to the second gear 42. In the present embodiment, the gear shaft 45 and the third gear 43 are one member. In addition, the second gear 42 and the third gear 43 can be integrally configured without the gear shaft 45.

[0057] <3. DIFFERENTIAL>

[0058] The differential 5 is a device for transmitting the torque output from the motor 2 to the wheels of the vehicle. The differential 5 has a function of transmitting the same torque to the axles 55 of the left and right wheels while absorbing the speed difference of the left and right wheels when the vehicle turns. The differential 5 has a ring gear 51, a gear housing (not shown), a pair of pinions (not shown), a pinion shaft (not shown), and a pair of side gears (not shown).

[0059] The ring gear 51 rotates around the differential axis J5 parallel to the motor axis J2. The torque output from the motor 2 is transmitted to the ring gear 51 via the reduction device 4. The gear housing houses the pair of pinions and the pair of side gears. When the torque is transmitted to the ring gear 51, the gear housing rotates around the differential axis J5 together with the ring gear 51. The pair of pinions are bevel gears facing each other. The pair of pinions are supported by the pinion shaft. The pair of side gears are bevel gears engaged perpendicularly to the pair of pinions. The pair of axles 55 are respectively fitted to each of the pair of side gears. With this structure of the differential 5, the pair of axles 55 rotate around the differential axis J5 with the same torque.

[0060] <4. MOTOR>

[0061] The motor 2 is an internal rotor type motor having a stator 30 and a rotor 20 disposed on the inner side of the stator 30 in a rotatable manner. The torque of the motor 2 is transmitted to the differential 5 via the reduction device 4.

[0062] (stator)

[0063] The stator 30 is held to the housing 6. The stator 30 has a coil 31, a stator core 32, and an insulating member (not shown). The stator core 32 has a plurality of magnetic pole teeth (not shown) from the inner peripheral surface of the yoke toward the radial inner side. The coil 31 is configured by winding a coil wire between the magnetic pole teeth. The coil wire is connected to the inverter unit 8 via a bus bar (not shown). The insulating member is interposed between the coil 31 and the stator core 32.

[0064] (rotor)

[0065] The rotor 20 has a shaft 21, a rotor core 24, and rotor magnets 25. The shaft 21 extends with a motor axis J2 extending in a horizontal direction and in a width direction of the vehicle (a direction perpendicular to a traveling direction of the vehicle) as a center. The shaft 21 is a hollow shaft having a hollow portion 22 inside. The hollow portion 22 has an inner peripheral surface extending along the motor axis J2. The rotor core 24 is configured by laminating silicon steel sheets. The rotor core 24 is a cylinder extending in an axial direction, and surrounds the shaft 21 from a radially outer side. The rotor magnets 25 are permanent magnets. In the present embodiment, a plurality of rotor magnets 25 are fixed to the rotor core 24 and arranged in a circumferential direction.

[0066] In the above structure, when a current is supplied to the coil 31, a magnetic flux is generated on the stator core 32. A magnetic field generated by the magnetic flux of the stator core 32 and a magnetic field generated by the rotor magnets 25 act, thereby generating a torque in the circumferential direction of the rotor 20. The rotor 20 rotates with the motor axis J2 as a center by the torque.

[0067] The above torque that rotates the motor 2 is transmitted to the ring gear 51 of the differential device 5 via the shaft 21 of the motor 2, the first gear 41, the second gear 42, the gear shaft 45, and the third gear 43 of the motor 2, respectively. Then, by the above torque, the pair of axles 55 coupled to the differential device 5 rotate with the differential axis J5 as a center. Thus, each wheel coupled to the pair of axles 55 rotates.

[0068] <5. Oil Passage>

[0069] The oil passage 90 is located inside the housing 6, that is, in the accommodation space 80. The oil passage 90 is configured across the motor chamber 81 and the gear chamber 82 of the accommodation space 80. The oil passage 90 is a path of the oil O that guides the oil O from the oil accumulation portion P (that is, a region of a lower side of the accommodation space 80) through the motor 2 to the oil accumulation portion P again. The oil passage 90 has a first oil passage 91 passing through the inside of the motor 2 and a second oil passage 92 passing through the outside of the motor 2. The oil O cools the motor 2 from the inside and the outside in the first oil passage 91 and the second oil passage 92.

[0070] The first oil passage 91 and the second oil passage 92 are each a path that supplies the oil O from the oil accumulation portion P to the motor 2 and recovers the oil O by returning the oil O to the oil accumulation portion P again. In the first oil passage 91 and the second oil passage 92, the oil O drips from the motor 2 and accumulates in a region of a lower side of the motor chamber 81. The oil O accumulated in the region of the lower side of the motor chamber 81 moves to a region of a lower side of the gear chamber 82, that is, the oil accumulation portion P, via the partition wall opening 68.

[0071] A cooler 97 that cools the oil O is provided in the path of the second oil passage 92. The oil O that has passed through the second oil passage 92 and has been cooled by the cooler 97 merges with the oil O that has passed through the first oil passage 91 in the oil reservoir P. In the oil reservoir P, the oils O that have passed through the first oil passage 91 and the second oil passage 92 mix with each other, whereby heat exchange is performed. Thus, the effect of the cooling of the oil O by the cooler 97 provided in the path of the second oil passage 92 also influences the oil O that has passed through the first oil passage 91. That is, one cooler 97 provided in the second oil passage 92, which is one of the first oil passage 91 and the second oil passage 92, can be used to cool the oils O in both oil passages. Alternatively, a cooler can be provided in the first oil passage 91 to cool the oils O in both oil passages.

[0072] The heat of the oil O is mainly dissipated by the cooler 97. In addition, the oil O is in contact with the inner surface of the housing 6, and thus a part of the heat of the oil O is also dissipated by the housing 6. In addition, as shown in FIG. 1, a concave-convex radiator portion 6b can be provided on the outer side of the housing 6. The radiator portion 6b promotes the cooling of the motor 2 via the housing 6. Figure 2

[0073] (First Oil Passage)

[0074] In the first oil passage 91, the oil O is lifted from the oil reservoir P by the differential device 5 and guided to the inside of the rotor 20. Centrifugal force due to the rotation of the rotor 20 is exerted on the oil O in the inside of the rotor 20. Thus, the oil O spreads equally toward the stator 30 that surrounds the rotor 20 from the radially outer side and cools the stator 30.

[0075] The first oil passage 91 has a lift-up path 91a, a shaft supply path 91b, a shaft inner path 91c, and a rotor inner path 91d. In addition, a first reservoir 93 is provided in the path of the first oil passage 91. The first reservoir 93 is provided in the accommodation space 80, particularly in the gear chamber 82.

[0076] The lift-up path 91a is a path through which the oil O is lifted from the oil reservoir P by the rotation of the ring gear 51 of the differential device 5 and the oil O is accepted by the first reservoir 93.

[0077] The first reservoir 93 is disposed on the side of the first gear 41. The first reservoir 93 is open on the upper side.

[0078] In the present specification, a "reservoir" refers to a configuration that has a function of accumulating oil in a state in which there is no stable flow of the liquid toward one direction. The "reservoir" differs from a "flow path" in that there is no stable flow of the liquid.

[0079] The first reservoir 93 is located directly above the ring gear 51, the second gear 42, and the third gear 43. In addition, the first reservoir 93 is located directly above the first gear 41. Figure 2 ​In the present embodiment, the differential axis J5, which is the center of rotation of the ring gear 51, is disposed on the vehicle rear side with respect to the reduction device 4. The oil O lifted by the ring gear 51 of the differential device 5 is poured to the upper side of the first reservoir 93 and stored in the first reservoir 93. That is, the first reservoir 93 receives the oil O lifted by the ring gear 51. In addition, immediately after the motor 2 is driven, in the case where the liquid level of the oil storage portion P is high, the second gear 42 and the third gear 43 come into contact with the oil O of the oil storage portion P and lift the oil O. In such a case, the first reservoir 93 receives the oil O lifted by the second gear 42 and the third gear 43 in addition to the oil O lifted by the ring gear 51.

[0080] In the present embodiment, the differential axis J5, which is the center of rotation of the ring gear 51, is disposed on the vehicle rear side with respect to the reduction device 4. The oil O lifted by the ring gear 51 of the differential device 5 is poured to the upper side of the first reservoir 93 and stored in the first reservoir 93. That is, the first reservoir 93 receives the oil O lifted by the ring gear 51. In addition, immediately after the motor 2 is driven, in the case where the liquid level of the oil storage portion P is high, the second gear 42 and the third gear 43 come into contact with the oil O of the oil storage portion P and lift the oil O. In such a case, the first reservoir 93 receives the oil O lifted by the second gear 42 and the third gear 43 in addition to the oil O lifted by the ring gear 51.

[0081] The shaft supply path 91b guides the oil O from the first reservoir 93 toward the motor 2. The shaft supply path 91b is constituted by a shaft supply flow path 94. The shaft supply flow path 94 extends from the first reservoir 93 toward the end portion of the shaft 21. The shaft supply flow path 94 guides the oil O stored in the first reservoir 93 from the end portion of the shaft 21 toward the hollow portion 22.

[0082] The shaft internal path 91c is a path for the oil O to pass through the inside of the hollow portion 22 of the shaft 21. In addition, the rotor internal path 91d is a path for the oil O to enter the rotor core 24 from the shaft 21 and pass through the inside of the rotor core 24 in the axial direction to be scattered toward the stator 30. That is, the first oil passage 91 has a path that passes through the inside of the rotor core 24 from the inside of the shaft 21.

[0083] In the shaft internal path 91c, centrifugal force due to the rotation of the rotor 20 is applied to the oil O inside the rotor 20. Due to this, the oil O is continuously scattered from the axial end portion of the rotor core 24 to the radially outer side. In addition, as the oil O is scattered, a negative pressure is created in the path inside the rotor 20. Therefore, the oil O stored in the first reservoir 93 is drawn to the inside of the rotor 20, and thus the path inside the rotor 20 is filled with the oil O. The movement of the oil O to the inside of the rotor 20 is also promoted by the capillary force in the first oil passage 91. The oil O that reaches the stator 30 takes heat from the stator 30.

[0084] (Second Oil Passage)

[0085] In the second oil passage 92, the oil O is drawn from the oil accumulation portion P to the upper side of the motor 2 and supplied to the motor 2. The oil O supplied to the motor 2 is transferred along the outer peripheral surface of the stator 30, takes heat from the stator 30, and thereby cools the motor 2. The oil O transferred along the outer peripheral surface of the stator 30 drips downward and is accumulated in the region on the lower side of the motor chamber 81. The oil O of the second oil passage 92 and the oil O of the first oil passage 91 join in the region on the lower side of the motor chamber 81. The oil O accumulated in the region on the lower side of the motor chamber 81 moves to the region on the lower side of the gear chamber 82, i.e., the oil accumulation portion P, via the partition wall opening 68.

[0086] The second oil passage 92 has a first flow passage 92a, a second flow passage 92b, and a third flow passage 92c. A pump 96, a cooler 97, and a second reservoir 98 are provided in the path of the second oil passage 92. In the second oil passage 92, the oil O passes through each portion in the order of the first flow passage 92a, the pump 96, the second flow passage 92b, the cooler 97, the third flow passage 92c, and the second reservoir 98, and is supplied to the motor 2.

[0087] The pump 96 is an electric pump that is driven by electricity. The pump 96 is mounted to the outer surface of the housing 6. The pump 96 has a suction port 96a and a discharge port 96b. The suction port 96a and the discharge port 96b are connected via an internal flow passage of the pump 96. The suction port 96a is connected to the first flow passage 92a. The discharge port 96b is connected to the second flow passage 92b. The discharge port 96b is located at a position on the upper side than the suction port 96a. The pump 96 sucks up the oil O from the oil accumulation portion P via the first flow passage 92a, and supplies the oil O to the motor 2 via the second flow passage 92b, the cooler 97, the third flow passage 92c, and the second reservoir 98.

[0088] The supply amount of the oil O supplied to the motor 2 by the pump 96 is appropriately controlled in accordance with the driving state of the motor 2. Therefore, when the temperature of the motor 2 increases, etc., in the case where long-time driving or high output is required, the driving output of the pump 96 is increased, and thereby the supply amount of the oil O supplied to the motor 2 is increased.

[0089] The cooler 97 has an inflow port 97a and an outflow port 97b. The inflow port 97a and the outflow port 97b are connected via an internal flow passage of the cooler 97. The inflow port 97a is connected to the second flow passage 92b. The outflow port 97b is connected to the third flow passage 92c. A cooling water pipe (omitted from illustration) for cooling water supplied from a radiator directly or via the inverter unit 8 is provided inside the cooler 97. The oil O passing through the inside of the cooler 97 is cooled by heat exchange with the cooling water.

[0090] (Second Reservoir)

[0091] The second reservoir 98 is located in the motor chamber 81 of the accommodation space 80. The second reservoir 98 is located on the upper side of the motor 2. The second reservoir 98 stores the oil O supplied to the motor chamber 81 via the third flow path 92c. Then, the second reservoir 98 supplies the stored oil O to each part of the motor 2 from the upper side via the flow outlet. The oil O flows along the outer peripheral surface of the motor 2 from the upper side toward the lower side, and takes the heat of the motor 2. Thus, the motor 2 as a whole can be cooled.

[0092] <6. Inverter Unit>

[0093] The inverter unit 8 is electrically connected to the motor 2 and the pump 96, and controls the electric current supplied to the motor 2 and the pump 96. The inverter unit 8 is fixed to the housing 6.

[0094] A refrigerant pipe extending from a radiator, which is not shown, is connected to the inverter unit 8. Also, the cooling water (refrigerant) that has cooled the inverter unit 8 is caused to flow into the cooler 97, and the cooling water and the oil O are heat-exchanged by the cooler 97, thereby cooling the oil O. Note that, in the present embodiment, the oil O is cooled by the cooling water that has cooled the inverter unit 8, but is not limited thereto. A pipe different from the refrigerant pipe that cools the inverter unit 8 can be provided, and the oil O can be cooled.

[0095] <7. Parking Lock Device>

[0096] (7-1. Outline of Parking Lock Device)

[0097] Figure 3 is a perspective view showing the outline of the parking lock device 7. Figure 4 is a front view of the parking lock device 7 when viewed from the +Y direction toward the -Y direction. Figure 5 is a side view of the parking lock device 7 when viewed from the -X direction toward the +X direction. Figure 6 is a perspective view showing the main part of the parking lock device 7 in an enlarged manner. The parking lock device 7 has a parking gear 71, a parking claw 72, a parking lever 73, a sleeve member 74, a flange 75, a manual shaft 76, an actuator 77, a claw shaft 78, a restriction member 79, a claw urging member 101, and a rotation stopper 102.

[0098] The parking gear 71 is provided on the outer peripheral surface of the gear shaft 45 together with the second gear 42 and the third gear 43 shown in Figure 2 Thus, the parking gear 71 rotates together with the second gear 42 and the third gear 43 about the intermediate axis line J4. The intermediate axis line J4 constitutes a first rotation axis line arranged in parallel with the Y direction. That is, the parking device 7 has the parking gear 71 that rotates about the first rotation axis line. The parking gear 71 has convex portions 71a and concave portions 71b alternately arranged in the circumferential direction of the intermediate axis line J4.

[0099] The parking pawl 72 rotates about the rotation axis J6. The rotation axis J6 is a second rotation axis that is disposed along the intermediate axis J4. The rotation axis J6 coincides with the central axis of the pawl shaft 78. The pawl shaft 78 is disposed so as to pass through the parking pawl 72 in the Y direction.

[0100] The parking pawl 72 has a protrusion 72a. The protrusion 72a is located in the parking pawl 72 at a position away from the rotation axis J6. When the parking pawl 72 rotates about the rotation axis J6, the protrusion 72a is engaged with the recess 71b of the parking gear 71, thereby meshing with the parking gear 71. That is, the parking lock device 7 has the parking pawl 72 that rotates about the second rotation axis along the first rotation axis, and the parking pawl 72 has the protrusion 72a that meshes with the parking gear 71.

[0101] The parking pawl 72 has a cam slide portion 72b. The cam slide portion 72b slides with the cam member 731 of the parking lever 73. In particular, the cam slide portion 72b slides with the cam member 731 when the parking lever 73 moves in a direction that transversely crosses the through-hole 74a of the sleeve member 74. That is, the parking pawl 72 has the cam slide portion 72b that slides with the cam member 731 when the parking lever 73 moves in the direction that transversely crosses the through-hole 74a. Here, the above-mentioned "direction that transversely crosses the through-hole 74a" refers to a direction that transversely crosses the ZX plane. Therefore, the "direction that transversely crosses the through-hole 74a" includes not only a direction parallel to the Y axis but also a direction inclined with respect to the Y axis.

[0102] The parking lever 73 has the cam member 731, a lever body 732, and a coil spring 733. The parking lever 73 extends from an end portion 73A in a direction parallel to the rotation axis J6, is bent downward (-Z direction), and has a lower end bent in the +X direction. The cam member 731 contacts the cam slide portion 72b of the parking pawl 72. The cam member 731 is inserted through the lever body 732. That is, the parking lock device 7 has the parking lever 73 that has the cam member 731 that contacts the parking pawl 72 and the lever body 732 into which the cam member 731 is inserted through. An end portion 73A side of the lever body 732 is covered with a cylindrical cover 73C. The cover 73C prevents the cam member 731 from falling out of the lever body 732. The coil spring 733 is inserted through the lever body 732 and applies a force to the cam member 731 toward the end portion 73A side of the lever body 732.

[0103] The sleeve member 74 has a through-hole 74a. The through-hole 74a is a hole that penetrates the sleeve member 74 in the direction along the second rotation axis. An end portion 73A of the rod main body 732 of the parking lever 73 is inserted in the through-hole 74a. That is, the parking lock device 7 has the sleeve member 74 having the through-hole 74a that penetrates in the direction along the second rotation axis, and the end portion 73A of the rod main body 732 of the parking lever 73 is inserted in the through-hole 74a.

[0104] In the present embodiment, the through-hole 74a is a long hole when viewed from the +Y direction side. That is, the through-hole 74a is a long hole when viewed in the direction along the rotation axis J6. The above long hole extends along the P direction in which the cam member 731 presses the cam slide portion 72b in the ZX plane by the cam member 731 sliding with the movement of the parking lever 73. That is, the through-hole 74a of the sleeve member 74 is a long hole that extends along the direction in which the cam member 731 slides with the movement of the parking lever 73 so that the cam member 731 presses the cam slide portion 72b in the plane perpendicular to the rotation axis J6.

[0105] The flange 75 supports the parking lever 73. In particular, the flange 75 supports the other end portion 73B of the rod main body 732. That is, the parking lock device 7 has the flange 75 that supports the other end portion 73B of the rod main body 732 of the parking lever 73.

[0106] The flange 75 has a rotation plate 751 and a support plate 752. The rotation plate 751 is coupled to the manual shaft 76 and rotates along the YZ plane about the manual shaft 76. The support plate 752 is coupled to the rotation plate 751 and rotates along the YZ plane integrally with the rotation plate 751.

[0107] The support plate 752 has an opening portion 752a. The other end portion 73B of the parking lever 73 is inserted in the opening portion 752a. Thus, the other end portion 73B of the parking lever 73 is supported by the support plate 752. In addition, the other end portion 73B of the parking lever 73 is supported by the support plate 752 at a position that deviates from the rotation axis of the flange 75, that is, the rotation axis of the manual shaft 76 in the YZ plane.

[0108] The manual shaft 76 is an axis that serves as the rotation axis of the flange 75 and is coupled to the flange 75. The rotation axis of the manual shaft 76 is disposed in the X direction. Therefore, when the manual shaft 76 rotates, the flange 75 rotates along the YZ plane.

[0109] The actuator 77 is a driving mechanism that rotates the flange 75 via the manual shaft 76. The rotation angle of the flange 75 when the actuator 77 rotates the flange 75 is set in advance in two manners. The actuator 77 is driven in accordance with a control signal from a control portion not shown, and rotates the flange 75 at any one of the rotation angles in the two manners via the manual shaft 76.

[0110] For example, the actuator 77 rotates the flange 75 by one rotational angle, whereby the parking lever 73 supported by the flange 75 is able to move by a prescribed amount in a direction across the through-hole 74a of the sleeve member 74. By this, the cam member 731 moves to push up the parking pawl 72, whereby the parking pawl 72 is able to rotate to the first position.

[0111] On the other hand, the actuator 77 rotates the flange by another rotational angle, whereby the parking lever 73 supported by the flange 75 is able to move by a prescribed amount in a direction opposite to the above. By this, the cam member 731 is able to release the push up of the parking pawl 72, and the parking pawl 72 is able to rotate to the second position.

[0112] Therefore, by the rotation of the flange 75 based on the actuator 77, the parking pawl 72 is able to rotate between the first position and the second position. Here, the above first position is a position where the protrusion portion 72a of the parking pawl 72 is engaged with the parking gear 71. Also, the above second position is a position where the protrusion portion 72 is distanced from the parking gear 71. Figures 3-5 The state where the parking pawl 72 is rotated to the first position is shown.

[0113] Thus, the parking lock device 7 has the actuator 77 that rotates and drives the flange 75 to move the parking lever 73 in a direction across the through-hole 74a. Also, the parking pawl 72 rotates between the first position where the protrusion portion 72a is engaged with the parking gear 71 and the second position where the protrusion portion 72a is distanced from the parking gear 71, by the movement of the cam member 731 that moves with the movement of the parking lever 73.

[0114] The restriction member 79 has a roller 79a and a support member 79b. The roller 79a slides with the outer circumferential surface of the rotation plate 751 of the flange 75 to restrict the rotation of the flange 75. The support member 79b is a plate spring that elastically supports the roller 79a. The end portion on the side opposite to the roller 79a of the support member 79b is fixed to the inside of the housing 6, for example, by a fixing tool 111 constituted by a bolt.

[0115] Here, the rotation plate 751 of the flange 75 has a first recessed portion 751a and a second recessed portion 751b. When the parking pawl 72 rotates to the first position according to the rotation of the flange 75, the roller 79a of the restriction member 79 is inserted into the first recessed portion 751a. When the parking pawl 72 rotates to the second position according to the rotation of the flange 75, the roller 79a is inserted into the second recessed portion 751b.

[0116] When viewed from the X direction, the first recess 751a and the second recess 751b have an asymmetrical shape. Specifically, a protrusion 751c is located between the first recess 751a and the second recess 751b. The first recess 751a and the second recess 751b are separated by the protrusion 751c. The apex of the protrusion 751c is located closer to the first recess 751a than the side of the second recess 751b. Thus, the aforementioned asymmetrical shape of the first recess 751a and the second recess 751b is achieved. In the aforementioned asymmetrical shape, the inclined surface of the protrusion 751c side of the second recess 751b is relatively gentler than the inclined surface of the protrusion 751c side of the first recess 751a. Therefore, with respect to the rotation of the flange 75, the roller 79a is more likely to disengage from the second recess 751b, but less likely to disengage from the first recess 751a.

[0117] The claw force-applying component 101 is a coil spring that applies force to the parking claw 72 in a direction of rotation from the first position to the second position, within a plane perpendicular to the rotation axis J6, i.e., the ZX plane. The claw force-applying component 101 is wound around the outer peripheral surface of the claw shaft 78. Furthermore, one end 101a of the claw force-applying component 101 is inserted into the hole 72c of the parking claw 72. The other end 101b of the claw force-applying component 101 is mounted on the housing 6. Thus, the claw force-applying component 101 can apply a force to the parking claw 72 in a direction of rotation from the first position to the second position.

[0118] When the parking pawl 72 rotates to the second position, the rotation prevention part 102 abuts against the parking pawl 72, thereby preventing the parking pawl 72 from rotating further due to the force of the pawl force application member 101. Such a rotation prevention part 102 is composed of a shaft extending in the Y direction. The rotation prevention part 102 is fixed to the housing 6.

[0119] As can be seen from the above, the parking locking device 7 can be represented as follows. That is, the parking locking device 7 has: a claw force-applying member 101, which applies force to the parking claw 72 in a plane perpendicular to the second rotation axis in the direction of rotation from the first position to the second position; and a rotation-stopping part 102, which prevents the parking claw 72 from rotating due to the force of the claw force-applying member 101 by abutting against the parking claw 72 when the parking claw 72 rotates to the second position.

[0120] (7-2. Regarding the operation of the parking lock device)

[0121] Figure 7 This is a perspective view showing the structure of the parking locking device 7 when the parking claw 72 is in the second position. Figure 8 Looking from the +Y direction toward the -Y direction Figure 7 The front view of the parking locking device at time 7. Figure 9 Looking from the -X direction toward the +X direction Figure 7 Side view of the parking locking device 7.

[0122] With the parking gripper 72 in the second position, the roller 79a of the limiting member 79 engages with the second recess 751b of the rotating plate 751. This prevents rotation of the flange 75, thus keeping the parking gripper 72 stably in the second position.

[0123] When the driver moves the gear shift lever to the parking position or manually releases the parking button, the actuator 77 is actuated by a control signal from a control unit (not shown). When the actuator 77 rotates the flange 75 by a predetermined angle in a counter-clockwise direction when viewed from the +X direction (clockwise when viewed from the -X direction) according to the aforementioned control signal, such as... Figure 5 As shown, the roller 79a of the limiting member 79 disengages from the second recess 751b and is inserted into the first recess 751a.

[0124] At this time, the parking lever 73 is supported by the flange 75 at a position in the YZ plane that is offset from the rotation axis of the flange 75, i.e., the central axis of the manual shaft 76. Therefore, the parking lever 73 is pushed out to the +Y direction due to the rotation of the flange 75. As a result, the cam component 731 of the parking lever 73 slides against the cam sliding portion 72b of the parking pawl 72b, pushing the parking pawl 72 upward. Then, as... Figures 3-5 As shown, the protrusion 72a of the parking pawl 72 enters the recess 71b of the parking gear 71. Therefore, the parking pawl 72 is rotated to the first position. In this state, the parking gear 71 is locked by the parking pawl 72.

[0125] When the parking gear 71 is locked, the gear for transmitting driving force, which is coaxially arranged with the parking gear 71, i.e. Figure 2 The second gear 42 and the third gear 43 shown are also locked. The vehicle's wheels are connected to the differential 5 via the axle 55. In addition, the gear ring 51 of the differential 5 meshes with the third gear 43. Therefore, on a slope, even if the vehicle wants to roll backward due to gravity, the second gear 42 and the third gear 43 are locked, so the wheels do not rotate and the vehicle does not roll backward.

[0126] Next, when the driver shifts the gear lever to D (drive) or manually closes the parking brake button, the actuator 77 is actuated by a control signal from a control unit (not shown). When the actuator 77 rotates the flange 75 by a predetermined angle according to the control signal (clockwise when viewed from the +X direction, and counterclockwise when viewed from the -X direction), as... Figure 9 As shown, the roller 79a of the limiting member 79 disengages from the first recess 751b and is inserted into the second recess 751b.

[0127] At this time, the parking lever 73 is supported by the flange 75 at a position offset from the rotational axis of the flange 75 in the YZ plane as described above, and thus is pulled back to the -Y direction side by the rotation of the flange 75. Accordingly, the cam member 731 of the parking lever 73 also moves to the -Y direction side, and thus the upward push of the cam member 731 against the cam slide portion 72b is released. In addition, by the claw urging member 101, a force acts on the parking claw 72 in a direction in which the parking claw 72 rotates from the first position to the second position. Thus, the parking claw 72 rotates from the first position toward the second position. Then, when the parking claw 72 comes into abutment with the rotation stop portion 102, the rotation of the parking claw 72 is stopped. Thus, the parking claw 72 is held in the second position.

[0128] In a state in which the parking claw 72 is in the second position, the locking of the parking claw 72 against the parking gear 71 is released. Thus, the second gear 42 and the third gear 43, which are provided coaxially with the parking gear 71, can be rotated. Accordingly, when the motor 2 is caused to rotate, the torque of the motor 2 is transmitted to the axle 55 via the first gear 41, the second gear 42, the third gear 43, and the differential 5, respectively. As a result, the wheels coupled to the axle 55 can be caused to rotate, and the vehicle can be caused to travel.

[0129] As described above, the parking lock device 7 of the present embodiment has the claw urging member 101 and the rotation stop portion 102. In this configuration, when the parking claw 72 rotates from the first position to the second position, the excessive rotation of the parking claw 72 beyond the second position due to the force of the claw urging member 101 can be prevented by the rotation stop portion 102. Thus, the rotation range of the parking claw 72 can be suppressed to the minimum required range between the first position and the second position.

[0130] (7-3. Effects related to the shape of the through-hole of the sleeve member)

[0131] Figure 10 is a perspective view of the parking lock device 7 in a state in which the protrusion portion 72a of the parking claw 72 collides with the convex portion 71a of the parking gear 71. Figure 11 is a front view of the parking lock device 7 when viewed from the +Y direction toward the -Y direction. Figure 10 Figure 12 is a side view of the parking lock device 7 when viewed from the -X direction toward the +X direction. Figure 10

[0132] During the rotation of the parking claw 72 from the second position to the first position, depending on the stop position of the rotating parking gear 71, the protrusion portion 72a of the parking claw 72 can collide with the convex portion 71a of the parking gear 71 as in Figures 10-12 ​​As shown, sometimes the protruding portion 72a of the parking pawl 72 does not enter the recessed portion 71b of the parking gear 71, and collides with the protruding portion 71a. When the protruding portion 72a collides with the protruding portion 71a, the parking pawl 72 receives an impact. This impact is transmitted from the parking pawl 72 to the parking lever 73, and further transmitted to the actuator 77 via the manual shaft 76. As a result, the components constituting the parking lock device 7, including the actuator 77, can be damaged by the above-mentioned impact.

[0133] Further, in the process of rotating the parking pawl 72 from the second position to the first position, the flange 75 is rotated by the actuator 77, as shown in Figure 12 As shown, the roller 79a of the restriction member 79 is disengaged from the second recessed portion 751b and engaged with the first recessed portion 751a. Then, the parking lever 73 is pushed out to the +Y direction side by the rotation of the flange 75. However, the parking pawl 72 cannot be rotated toward the first position by the collision of the protruding portion 72a with the protruding portion 71a. Therefore, even if the parking lever 73 is pushed out to the +Y direction side, the cam member 731 does not move to the +Y direction side to push up the parking pawl 72. In this case, the coil spring 733 that applies a force to the cam member 731 is contracted, and thus the cam member 731 does not push up the parking pawl 72, and maintains the state of being in contact with the cam sliding portion 72b.

[0134] In the present embodiment, as shown in Figure 4 and the like, the through-hole 74a of the sleeve member 74, through which the lever main body 732 of the parking lever 73 penetrates, is a long hole when viewed in the +Y direction along the rotation axis J6. In this structure, when the protruding portion 72a of the parking pawl 72 collides with the protruding portion 71a of the parking gear 71 and the parking lever 73 receives an impact, the lever main body 732 can move within the long hole of the through-hole 74a. By this movement of the lever main body 732, the impact received by the parking lever 73 can be absorbed or mitigated. As a result, the damage of the constituent components caused by the above-mentioned impact can be reduced.

[0135] Further, when the lever main body 732 moves within the long hole, the cam member 731 slides with the sleeve member 74, and thus can move to the -Y direction side against the force of the coil spring 733. That is, by the coil spring 733 applying a force to the cam member 731 to the +Y direction side, when an impact is received, the lever main body 732 can move within the long hole while moving the cam member 731 to the -Y direction side.

[0136] Especially, in the present embodiment, as shown in Figure 4 and Figure 6As shown, the through-hole 74a of the sleeve member 74 is an elongated hole extending in the P direction in the ZX plane perpendicular to the rotation axis J6. As described above, the P direction is the direction in which the cam member 731 presses the cam slide portion 72b in the ZX plane as the parking lever 73 moves, whereby the cam member 731 slides with the cam slide portion 72b. When the protrusion portion 72a of the parking pawl 72 collides with the convex portion 71a of the parking gear 71, an impact received by the parking lever 73 via the parking pawl 72 is applied in a direction opposite the above-described P direction. The through-hole 74a is an elongated hole extending in the P direction, whereby when the above-described impact is applied to the parking lever 73, the lever main body 732 moves in the above-described opposite direction along the elongated hole. With this movement of the lever main body 732, the parking lever 73 can effectively absorb or mitigate the impact.

[0137] (7-4. Details of the Parking Lever)

[0138] Next, details of the above-described parking lever 73 will be described. Figure 13 And Figure 14 is a perspective view of the parking lever 73 in a state in which the one end portion 73A is inserted into the through-hole 74a of the sleeve member 74. In particular, Figure 13 is a perspective view of the parking lever 73 in a state in which the parking pawl 72 is positioned at the second position. Figure 14 is a perspective view of the parking lever 73 in a state in which the parking pawl 72 is positioned at the first position.

[0139] (Cam Member)

[0140] The cam member 731 of the parking lever 73 has a frustoconical cylindrical portion 731a and a cylindrical portion 731b. The frustoconical cylindrical portion 731a has a tapered surface 731al. The tapered surface 731al is an outer peripheral surface of the frustoconical cylindrical portion 731a whose outer diameter increases from the one end portion 73A side toward the other end portion 73B side of the lever main body 732. The cylindrical portion 731b is connected to the frustoconical cylindrical portion 731a at the other end portion 73B side. The cylindrical portion 731b has an outer peripheral surface 731bl. The outer peripheral surface 731bl is a surface having the same outer diameter as the maximum outer diameter of the frustoconical cylindrical portion 731a. That is, the cam member 731 has the frustoconical cylindrical portion 731a having the tapered surface 731al whose outer diameter increases from the one end portion 73A side toward the other end portion 73B side of the lever main body 732, and the cylindrical portion 731b connected to the frustoconical cylindrical portion 731a at the other end portion 73B side of the lever main body 732, and having the outer peripheral surface 731bl having the same outer diameter as the maximum outer diameter of the frustoconical cylindrical portion 731a.

[0141] (Levor Main Body)

[0142] The lever main body 732 of the parking lever 73 has a first lever 732a, a second lever 732b, and a third lever 732c. The third lever 732c links the first lever 732a and the second lever 732b.

[0143] The first lever 732a extends linearly in a direction that crosses the ZX plane. The aforementioned one end portion 73A of the lever main body 732 is an end portion of the first lever 732a on the opposite side from the linking side of the third lever 732c. The aforementioned cam member 731 is inserted through the first lever 732a. The first lever 732a is inserted into the through-hole 74a of the sleeve member 74.

[0144] The second lever 732b extends linearly in a direction that crosses the YZ plane. The aforementioned other end portion 73B of the lever main body 732 is an end portion of the second lever 732b on the opposite side from the linking side of the third lever 732c. The second lever 732b is inserted into the opening portion 752a of the support plate 752 of the flange 75 and is supported by the support plate 752.

[0145] In a state in which the parking claw 72 is located at the first position, the third lever 732c extends from the linking side of the second lever 732b in the +Z direction, and after extending further in the +Z direction while being slightly bent in the +X direction on one side, is bent in the +Y direction to link with the first lever 732a. This third lever 732c has an overlapping portion 732vl. As shown in Figure 5 and Figure 9 As shown, when viewed from the axial direction of the manual shaft 76, that is, for example, when viewed from the -X direction toward the +X direction, the overlapping portion 732vl overlaps with the rotation plate 751 of the flange 75. That is, the parking lever 73 has the overlapping portion 732vl that overlaps with the rotation plate 751 of the flange 75 when viewed from the axial direction of the manual shaft 76.

[0146] In this configuration, when viewed from the axial direction of the manual shaft 76, the space overlapping with the rotation plate 751 of the flange 75 can be effectively used to arrange the parking lever 73. Therefore, the flange 75 and the parking lever 73 can be arranged compactly and concentrated, thereby miniaturizing the parking lock device 7 as a whole.

[0147] In particular, when the parking claw 72 is rotated to the first position (refer to Figure 9 ) and to the second position (refer to Figure 5 ), on both occasions, the overlapping portion 732vl overlaps with the rotation plate 751 when viewed from the axial direction of the manual shaft 76. Thus, the locking and unlocking of the parking gear 71 based on the rotation of the parking claw 72 can be achieved by the compact configuration of the parking lock device 7.

[0148] Further, the parking lever 73 has a first lever 732a into which the cam member 731 is inserted through, a second lever 732c supported by the insertion of the opening portion 752a of the support plate 752, and a third lever 732c linking the first lever 732a and the second lever 732b, the third lever 732c having an overlapping portion 732vl. That is, in the parking lever 73, the third lever 732c linking the first lever 732a and the second lever 732b at the middle has the overlapping portion 732vl. Thereby, even in the structure in which the second lever 732b is supported by the support plate 752 and does not overlap the rotation plate 751 when viewed in the axial direction of the manual shaft 76, the third lever 732c can overlap the rotation plate 751, and thus the parking lock device 7 as a whole can be downsized.

[0149] Further, the overlapping portion 732vl has a bent portion 732va. The bent portion 732va is a portion bent from the +Z direction toward the +Y direction in the third lever 732c. In this structure, the parking lever 73 can be configured so that the overlapping portion 732vl is positioned at a position overlapping the rotation plate 752 when viewed in the axial direction of the manual shaft 76, and the first lever 732a linked to the third lever 732c extends in a direction different from the central axis direction of the second lever 732b via the bent portion 732va. Thereby, the degree of freedom in design of the parking lever 73 can be increased.

[0150] The above-described third lever 732c also has a linking portion 732v2. The linking portion 732v2 overlaps the support plate 752 of the flange 75 and is linked to the overlapping portion 732vl when viewed in the axial direction of the manual shaft 76. That is, the third lever 732c also has the linking portion 732v2 overlapping the support plate 752 of the flange 75 and linked to the overlapping portion 732vl when viewed in the axial direction of the manual shaft 76.

[0151] In the structure in which the third lever 732c has the overlapping portion 732vl and the linking portion 732v2, the third lever 732 overlaps both the support plate 752 and the rotation plate 751 of the flange 75 when viewed in the axial direction of the manual shaft 76. Thereby, the arrangement of the parking lever 73 with respect to the flange 75 can be made more compact, and thus the parking lock device 7 as a whole can be further downsized.

[0152] Further, in addition to the cam member 731, a coil spring 733 is inserted through the lever main body 732. One end portion 733a of the coil spring 733 is caught by the first lever 732a of the lever main body 732. Further, the other end portion 733b of the coil spring 733 is caught by the cam member 731. Therefore, the cam member 731 is urged toward the one end portion 73A by the coil spring 733.

[0153] (7-5. Details of the Sleeve Member)

[0154] Figure 15is a perspective view when the sleeve member 74 is viewed from the -Y direction side. The sleeve member 74 has a cam receiving portion 74b. The cam receiving portion 74b receives the above-mentioned frustoconical cylindrical portion 731a and the cylindrical portion 731b of the cam member 731. In particular, the cam receiving portion 74b receives the cam member 731 from the opposite side to the contact side with the cam sliding portion 72b. Further, the cam receiving portion 74b slides with the frustoconical cylindrical portion 731a and the cylindrical portion 731b when the parking lever 73 moves in the direction across the through-hole 74a. That is, the sleeve member 74 has the cam receiving portion 74b which receives the cam member 731 while sliding with the cam member 731 when the parking lever 73 moves in the direction across the through-hole 74a.

[0155] In this structure, the one end portion 73A side of the parking lever 73 is supported by the cam receiving portion 74b of the sleeve member 74 via the cam member 731. Further, the other end portion 73B side of the parking lever 73 is supported by the flange 75 as described above. In this way, the both end portions of the parking lever 73 are supported by the sleeve member 74 and the flange 75 respectively, whereby the support of the parking lever 73 is stable compared to a configuration in which only one end portion of the parking lever 73 is supported. Further, the cam receiving portion 74b receives the cam member 731 while sliding with the cam member 731, and thus the movement of the cam member 731 can be guided to stabilize the movement of the parking lever 73.

[0156] The above-mentioned cam receiving portion 74b has a concave surface 74b1. The concave surface 74b1 is a concave shaped surface which abuts against the tapered surface 731a1 of the frustoconical cylindrical portion 731a and the outer peripheral surface 731b1 of the cylindrical portion 731b when the parking lever 73 moves in the direction across the through-hole 74a. That is, the cam receiving portion 74b has the concave surface 74b1 which abuts against the tapered surface 731a1 of the frustoconical cylindrical portion 731a and the outer peripheral surface 731b1 of the cylindrical portion 731b when the parking lever 73 moves in the direction across the through-hole 74a.

[0157] In this structure, when the parking lever 73 is moved in the direction across the through-hole 74a, for example, toward the +Y direction side from the state shown in Fig. 17, the cam member 731 is received by the cam receiving portion 74b of the sleeve member 74 while sliding with the cam receiving portion 74b. Figure 13 As shown in Fig. 18, the frustoconical cylindrical portion 731a and the cylindrical portion 731b of the cam member 731 abut against and slide with the concave surface 74b1 of the cam receiving portion 74b in this order when the parking lever 73 is moved in the direction across the through-hole 74a, for example, toward the +Y direction side from the state shown in Fig. 17. Figure 14 As shown in Fig. 18, the frustoconical cylindrical portion 731a and the cylindrical portion 731b of the cam member 731 abut against and slide with the concave surface 74b1 of the cam receiving portion 74b in this order when the parking lever 73 is moved in the direction across the through-hole 74a, for example, toward the +Y direction side from the state shown in Fig. 17.

[0158] Further, the through-hole 74a of the sleeve member 74 is a long hole as described above, and thus the rod main body 73 can be displaced in the X direction and in the Z direction, for example, while being displaced in the X direction. Therefore, even in the case where the rod main body 732 is pushed up with respect to the cam receiving portion 74b with displacement in both the X direction and the Z direction, the displacement of the rod main body 732 is not hindered by the through-hole 74a.

[0159] Conversely, when the lever 73 is moved from the state shown in FIG. 17 toward the -Y direction side by the rotation of the flange 75, Figure 14 the rod main body 732 is displaced toward the cam receiving portion 74b. Further, by the claw urging member 101, a force acts on the lever 73 in the direction of rotation from the first position toward the second position. By the displacement of the rod main body 732 and the force of the claw urging member 101, the lever 73 is rotated about the rotation axis J6 from the first position toward the second position. Figure 13 Further, as shown in FIG. 18, the sleeve member 74 further has a pin through-insertion portion 74c and a fixing through-hole 74d. The pin through-insertion portion 74c is a recess into which a positioning pin 121 (refer to FIG. 19) to be described later is inserted. Further, the pin through-insertion portion 74c can also be constituted by a through-hole into which the positioning pin 121 is inserted. The fixing through-hole 74d is a hole into which a fixing member 122 (refer to FIG. 19) to be described later is inserted.

[0160] Figure 15 Further, as shown in FIG. 18, the sleeve member 74 further has a pin through-insertion portion 74c and a fixing through-hole 74d. The pin through-insertion portion 74c is a recess into which a positioning pin 121 (refer to FIG. 19) to be described later is inserted. Further, the pin through-insertion portion 74c can also be constituted by a through-hole into which the positioning pin 121 is inserted. The fixing through-hole 74d is a hole into which a fixing member 122 (refer to FIG. 19) to be described later is inserted. Figure 16 Figure 16

[0161] Figure 16 is a perspective view of the sleeve member 74 in a state where the positioning pin 121 and the fixing member 122 are attached. As shown in this Figure 16 , the lever lock device 7 has the positioning pin 121 and the fixing member 122. The positioning pin 121 is a pin for positioning the sleeve member 74 with respect to the housing 6. The fixing member 122 is provided so as to pass through the sleeve member 74, and fixes the sleeve member 74 to the housing 6. Such a fixing member 122 is constituted by a bolt, for example.

[0162] Figure 17 is a perspective view of the inside of the housing 6 to which the sleeve member 74 is attached, shown on an enlarged scale. Figure 18 is a perspective view of the inside of the housing 6 to which the sleeve member 74 is attached, shown on an enlarged scale. Figure 17 ​​​A perspective view of the inside of the case 6 in a state where the sleeve member 74 is removed. The gear housing portion 62 of the case 6 housing at least the sleeve member 74 is provided with a first mounting hole 62a and a second mounting hole 62b. One end of the positioning pin 121 is inserted into the pin penetration insertion portion 74c of the sleeve member 74, and the other end is inserted into the first mounting hole 62a of the gear housing portion 62. In addition, the fixing member 122 is inserted into the second mounting hole 62b of the gear housing portion 62 in a state of being inserted into the penetration hole 74d of the sleeve member 74, and is fixed.

[0163] As described above, the parking lock device 7 of the present embodiment further has the case 6 housing at least the sleeve member 74, the fixing member 122 penetrating the sleeve member 74 and fixed to the case 6, and the positioning pin 121 for positioning the sleeve member 74 with respect to the case 6. For example, when the sleeve member 74 is fixed to the case 6 only by the fixing member 122, in a case where the sleeve member 74 is impacted via the parking claw 72 and the parking lever 73 by the collision of the protrusion portion 72a and the convex portion 71a, the sleeve member 74 can rotate in the ZX plane with the fixing member 122 as an axis.

[0164] In the present embodiment, the sleeve member 74 is positioned not only by the fixing member 122 but also by the positioning pin 121. That is, the sleeve member 74 is positioned with respect to the case 6 at two points and is supported. Thereby, it is possible to prevent the sleeve member 74 from rotating in the ZX plane with the fixing member 122 as an axis due to the impact via the parking lever 73.

[0165] (7-6. Details of the flange)

[0166] Figure 19 is a perspective view of the flange 75 in a state of supporting the other end portion 73B of the parking lever 73. In addition, Figure 20 is a front view of the support plate 752 of the flange 75 when viewed from the +X direction. As described above, the support plate 752 of the flange 75 has the opening portion 752a. Also, the other end portion 73B of the lever main body 732 of the parking lever 73 is inserted into the opening portion 752a. At this time, the other end portion 73B is inserted into the opening portion 752a with the gap T in the radial direction. That is, the flange 75 has the opening portion 752a into which the other end portion 73B of the lever main body 732 is inserted with the gap T.

[0167] Further, the other end portion 73B of the rod main body 732 has anti-coming-off members 73B1 and 73B2. The anti-coming-off members 73B1 and 73B2 are arranged in the axial direction. Further, the anti-coming-off members 73B1 and 73B2 are respectively located at two places that are point-symmetrical in the circumferential direction of the other end portion 73B. On the other hand, the opening portion 752a of the support plate 752 has a notch portion 752al. The notch portion 752al is located at two places that are point-symmetrical in the circumferential direction of the opening portion 752a. In the YZ plane, the shape of the notch portion 752al is larger than the shapes of the anti-coming-off members 73B1 and 73B2 of the rod main body 732.

[0168] When the other end portion 73B and the anti-coming-off member 73B1 are inserted through the inside of the opening portion 752a and the notch portion 752al, and the opening portion 752a of the support plate 752 is located between the anti-coming-off members 73B1 and 73B2, the rod main body 732 is rotated by a slight angle in the circumferential direction of the other end portion 73B. Thus, the anti-coming-off members 73B1 and 73B2 are hooked to the support plate 752, so that the other end portion 73B does not come off from the opening portion 752. In this way, the other end portion 73B of the rod main body 732 is supported by the support plate 752.

[0169] Figure 21 and Figure 22 is a plan view showing the state of the parking lever 73 as viewed from the -Z direction side. In particular, Figure 21 shows the state of the parking lever 73 when the parking claw 72 is located at the first position. Figure 22 shows the state of the parking lever 73 when the parking claw 72 is located at the second position.

[0170] In the present embodiment, as described above, the other end portion 73B of the rod main body 732 is inserted into the opening portion 752a of the flange 75 with the gap T interposed therebetween. Thus, the flange 75 can support the parking lever 73 so as to be swingable. Therefore, when the parking lever 73 is moved by the rotational drive of the flange 75, the movement of the parking lever 73 can be made to have a degree of freedom.

[0171] For example, the parking lever 73 supported by the support plate 752 is located at a position away from the axis of the manual shaft 76. Therefore, when the flange 75 is rotated with the manual shaft 76 as the axis, the parking lever 73 is displaced in the -Z direction while moving toward the -Y direction side. In the case where the parking lever 73 is supported by the flange 75 so as to be swingable, the parking lever 73 can be made to be inclined with respect to the YZ plane while being displaced in both the Y direction and the Z direction.

[0172] Thus, the one end portion 73A can be made to move in the ZX plane in the direction of the through-hole 74a of the sleeve member 74 simultaneously with the above-described displacement of the parking lever 73 in the two directions, so that the cam member 731 is made to slide with respect to the parking claw 72 (see FIG. 17). Figure 4 Figure 8 ​In other words, as described above, even when the through hole 74a of the sleeve component 74 is formed by an elongated hole to absorb impact, and the parking lever 73 shifts in both directions as the flange 75 rotates, it is still possible to maintain the state in which the cam component 731 slides against the parking pawl 72 by moving the parking lever 73.

[0173] (7-7. Motor Unit)

[0174] like Figure 2 As shown, the motor unit 1 described in this embodiment includes the parking lock device 7, a motor 2, a reduction gear 4 having a second gear 42 (intermediate gear) and transmitting the rotational driving force of the motor 2, and a differential device 5 that transmits the rotational driving force transmitted via the reduction gear 4 to the axle 55 of the driving vehicle's wheels. Furthermore, the parking gear 71 of the parking lock device 7 is coaxially arranged with the intermediate gear.

[0175] As described above, when the parking gear 71 is locked by the parking pawl 72, the second gear 42, which is coaxially arranged with the parking gear 71, is also locked. The reduction gear 4, which has the second gear 42, transmits rotational driving force to the axle 55 via the differential gear 5. Therefore, when the second gear 42 is locked, the axle 55 does not rotate, and thus the wheels do not rotate. On the other hand, when the parking pawl 72 releases its lock on the parking gear 71, the second gear 42 can rotate. As a result, the rotational driving force of the motor 2 is transmitted to the axle 55 via the reduction gear 4 and the differential gear 5, thereby causing the wheels to rotate.

[0176] The motor unit 1 has the parking locking device 7 of this embodiment, thereby reducing the damage to the components caused by the impact of the collision between the protrusion 72a of the parking pawl 72 and the parking gear 71 in the motor unit 1, which uses the motor 2 as a power source.

[0177] (8. Other)

[0178] For example, Figure 3 As shown, the circumferential surface of the surface forming the recess 71b of the parking gear 71 is designated as the side surface 71b1. When the parking pawl 72 is rotated to the first position, and the wheel rotates on a slope, thus applying a rotational load to the parking gear 71, the protrusion 72a of the parking pawl 72 sometimes contacts the side surface 71b1 of the recess 71b of the parking gear 71. In this case, even if the parking pawl 72 rotates from the first position to the second position, the friction at the contact surface is relatively large. Therefore, the protrusion 72a does not disengage from the recess 71b, and the parking gear 71 may not be released.

[0179] Therefore, the protrusion 72a of the parking pawl 72 is preferably shaped to be in line contact with the side surface 71b1 of the recess 71b of the parking gear 71. For example, in the protrusion 72a, in a structure in which the contact portion with the side surface 71b1 of the recess 71b is flat, the side surface 71b1 of the recess 71b is preferably convex. In this case, when the parking pawl 72 is to be rotated from the first position to the second position, the friction at the contact position of the protrusion 72a with the recess 71b becomes smaller than in the case of surface contact. Thus, the protrusion 72a easily falls from the recess 71b, and thus the locking of the parking gear 71 is easily released.

[0180] (Deformed example of pawl urging member)

[0181] Figure 23 is a perspective view showing the outline structure of the parking lock device 7 using a deformed example of a pawl urging member. Figure 24 (a) of FIG. 10 is an explanatory view of a deformed example of a pawl urging member mounted to a housing, Figure 24 (b) of FIG. 10 is an explanatory view showing when the deformed example of the pawl urging member is being mounted to the housing, Figure 24 (c) of FIG. 10 is an explanatory view showing when the pawl urging member shown in the present embodiment is being mounted to the housing.

[0182] The pawl urging member 1010 is, like the above-described pawl urging member 101, a coil spring that urges the parking pawl 72 in the direction of rotation from the first position to the second position in the plane perpendicular to the second rotation axis J6, that is, in the ZX plane. That is, the parking pawl 72 is rotated between the first position in which the protrusion 72a engages with the parking gear 71 and the second position in which the protrusion 72a is away from the parking gear 71 by the movement of the cam member 731 that moves with the movement of the parking lever 73.

[0183] The housing 6 of the gear housing portion 62 has a support portion 66 that supports the pawl shaft 78 so as to be rotatable and a placement portion 67 that places the other arm portion 1010B of the pawl urging member 1010. Also, the support portion 66 rises from the placement portion 67 to become a rising surface 67A thereof.

[0184] The pawl shaft 78 is provided so as to pass through the support portion 66 and the parking pawl 72 in the Y direction. The parking pawl 72 rotates about the rotation axis J6. That is, the rotation axis J6 coincides with the central axis of the pawl shaft 78.

[0185] The pawl urging member 1010 is inserted into the outer periphery of the pawl shaft 78. Also, the parking pawl 72 is formed with a hole 72c in the side surface thereof, into which one end portion 1010a of one arm portion 1010A of the pawl urging member 1010 is inserted.

[0186] As Figure 24As shown in (a), the claw urging member 1010 has a coil portion 1010C and one arm portion 1010A and another arm portion 1010B formed so that the start end and the end of the coil portion 1010C extend outward in the peripheral direction from the coil portion 1010C. The wire of the coil portion 1010C is spirally wound, and the coil portion 1010C is wound around the outer peripheral surface of the claw shaft 78. One end portion 1010a of the one arm portion 1010A is bent toward the parking pawl 72 in the direction along the rotation axis J6 and is inserted into the hole 72c formed in the side surface of the parking pawl 72 (refer to FIG. 9) and is supported thereby. Figure 23

[0187] The other arm portion 1010B is bent toward the parking pawl 72 in the direction along the rotation axis J6 and is placed on the placement portion 67 of the housing 62. The other end portion 1010b of the arm portion 1010B is bent toward the coil portion 1010C and is further bent toward the parking pawl 72 in the direction along the rotation axis J6. Also, the other end portion 1010b is bent at substantially a right angle with respect to the rotation axis J6. That is, the front end 1010x of the other end portion 1010b is bent at substantially a right angle in the direction away from the coil portion 1010C. That is, as shown in the drawing, the front end of the end portion 1010b is directed in the direction away from the coil portion 1010C.

[0188] Next, the case where the claw urging member 1010 is attached to the housing 62 will be described.

[0189] First, the case where the claw urging member 1010 is attached to the housing 62 will be described using (a). Figure 24 Next, the case where the claw urging member 1010 is attached to the housing 62 will be described using (a).

[0190] First, the claw urging member 1010 is slid in the -X direction with respect to the claw shaft 78, and the coil portion 1010C of the claw urging member 1010 is inserted into the claw shaft 78. At the same time, one end portion 101a of the one arm portion 1010A is inserted into the hole 72c of the parking pawl 72. Thus, the one arm portion 1010A of the claw urging member 1010 is inserted in a state where it is located at substantially the same position in the peripheral direction as the state after the attachment is completed when viewed in the direction along the rotation axis J6. Therefore, the position of the other arm portion 1010B of the claw urging member 1010 at the time of the start of the attachment is such that the other end portion 1010b is elastically deformed toward the Y direction compared with the position of the other arm portion 1010B of the claw urging member 1010 after the attachment.

[0191] ​Specifically, the other arm 101B of the claw force-applying component 101 slides the mounting portion 67 of the housing 6 toward the claw shaft 78. When this arm 101B contacts the raised surface 67, a force pressing the arm 101B toward the opposite side (Y direction) of the coil portion 101C is applied, causing the arm 101B to flex. Its reaction force acts on the flexed arm 101B, thereby applying a force to press the raised surface 67. At this time, the front end of the end 101b faces the coil portion side, i.e., the housing 6 side, and the edge is raised on its end face. Therefore, due to the elasticity of the arm, it slides while pressing against the raised surface 67A of the housing 6, which may sometimes damage the raised surface 67A. As a result, contamination may sometimes occur.

[0192] In contrast, in the modified example of the claw force-applying component 1010, such as Figure 24 As shown in (b), the front end 1010x of the other end 1010b is bent at approximately a right angle away from the coil portion 1010C. That is, the front end 1010x of the other end 1010b faces away from the raised surface 67A of the housing 6. In this way, the front end 1010x of the other end 1010b does not face the raised surface 67A, so when assembling the claw force-applying member 1010, it is possible to avoid contact between the edge and the raised surface 67A of the housing 6. As a result, assembly can be performed without the front end 1010c contacting the raised surface 67A, thereby avoiding damage and contamination caused by contact with the edge. Furthermore, as Figure 24 As shown in (b), the other end 1010b slides while in contact with the upright surface 67A, thus enabling smooth sliding and improving assemblability.

[0193] Furthermore, the orientation of the front end 1010x is not limited to bending at approximately a right angle away from the coil portion 1010C as in the modified example. It is acceptable as long as the front end 1010x is oriented in a direction different from the direction of the mounting claw force application member 1010 and is oriented in a direction that does not contact the upright surface 67A or the mounting portion 67.

[0194] The embodiments of the present invention have been described above, but the scope of the present invention is not limited thereto, and various modifications can be made to implement it without departing from the spirit of the invention. Furthermore, the above embodiments and their variations can be appropriately and arbitrarily combined.

[0195] Industrial availability

[0196] The parking locking device of the present invention can be applied, for example, to a motor unit that drives a vehicle using a motor as a power source.

Claims

1. A parking locking device, comprising: The parking gear rotates around the first rotation axis; A parking pawl having a protrusion that meshes with the parking gear, and the parking pawl rotating about a second rotation axis along the first rotation axis; A parking lever having a cam component that contacts the parking pawl and a lever body through which the cam component is inserted; A sleeve component, which has one end of the rod body into which the parking lever is inserted in a through hole; A flange that supports the other end of the main body of the parking lever; A manual shaft, which serves as the axis of rotation for the flange, is connected to the flange; and An actuator, which rotates the flange via the manual shaft, thereby moving the parking lever. The parking pawl rotates between a first position where the protrusion engages with the parking gear and a second position where the protrusion moves away from the parking gear, caused by the movement of the cam component as the parking lever moves. The parking locking device also has: A housing that houses the sleeve component; as well as A fixing component that secures the sleeve component to the housing. The parking claw and the sleeve component are fixed in the housing. The parking claw, the sleeve component, and the flange are located radially outside the parking gear. In a direction perpendicular to the first axis of rotation, the flange is located between the fixing part of the sleeve component and the protrusion for the parking pawl to engage with the parking gear.

2. The parking locking device according to claim 1, wherein, The housing has: The motor compartment houses the motor. The gear chamber houses the differential device and the reduction gear that transmits the rotational driving force of the motor. as well as The partition divides the motor chamber and the gear chamber. The parking locking device is located in the gear chamber.

3. The parking locking device according to claim 2, wherein, The actuator is fixed to the outer peripheral surface of the gear chamber of the housing.

4. The parking locking device according to claim 3, wherein, The reduction gear has a motor gear, an intermediate gear, and a final drive gear. The differential has a gear ring that meshes with the final drive gear. The direction perpendicular to the first rotation axis is the vehicle's front-rear direction, and in this front-rear direction, the parking locking device is located on the front side of the gear chamber.

5. The parking locking device according to claim 4, wherein, The oil passage is located inside the housing. An oil reservoir that stores the oil supplied to the oil passage is located in the gear chamber.

6. The parking locking device according to claim 5, wherein, A cooler for cooling the oil and a pump for drawing the oil from the oil reservoir and supplying the oil to the motor are provided in the path of the oil circuit.

7. The parking locking device according to claim 6, wherein, The pump is an electric pump, and the pump is mounted on the outer peripheral surface of the housing.

8. The parking locking device according to any one of claims 2 to 7, wherein, An inverter unit is fixed to the housing, which is electrically connected to the motor and supplies current to the motor.

9. A motor unit comprising: The parking locking device as described in claim 4 or 7; motor; A speed reduction device having an intermediate gear, and the speed reduction device being used to transmit the rotational driving force of the motor; as well as A differential device that transmits the rotational driving force, via the reduction gear, to the axle that drives the wheels of the vehicle. The parking gear of the parking locking device is coaxially arranged with the intermediate gear.

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