PARKING MECHANISM AND DRIVE DEVICE

Abstract

A parking mechanism (8) comprising: a parking gear (10) which rotates together with a wheel of a vehicle around a main axis (J1), a parking pawl (20) which has an engagement section (25) which faces a tooth section (11) of the parking gear (10) and which is rotatable about a first axis of rotation (AX1) parallel to the main axis (J1), a cam rod (30) which extends along a first direction which is perpendicular to the main axis (J1) and is actuated along the first direction, a cam (35) which is attached to the cam rod (30) is in contact with a cam contact section (23) of the parking pawl (20) and moves along the first direction with the actuation of the cam rod (30) to rotate the parking pawl (20) about the first axis of rotation (AX1) and to move the engagement section (25) in the direction of the parking gear (10), a U-shaped sleeve (80) which is open in the direction of the parking lock latch (20) and supports the cam (35), and a pawl stopper (85) which comes into contact with a stopper contact section (24) of the parking pawl (20) to limit the movement of the parking pawl (20) towards the cam rod (30), wherein the cam rod (30) is inserted into the sleeve (80), and the pawl stopper (85) is arranged between the parking pawl (20) and the cam rod (30), wherein the parking mechanism (8) further comprises a housing (6) which contains the sleeve (80) and the pawl stopper (85), wherein the pawl stopper (85) is attached to an inner surface of the housing (6), wherein the sleeve (80) is fastened to the inner surface of the housing (6) by a single fastening screw (84) which extends parallel to the main axis (J1), and the sleeve (80) comes into contact with the pawl stopper (85) in a direction of rotation when the fastening screw (84) is tightened.

Description

Field of invention

[0001] The present invention relates to a parking mechanism and a drive device. Background technology

[0002] A parking mechanism is attached to a drive device that propels a vehicle. JP 2019-158078A discloses a parking mechanism that pushes a parking pawl towards a parking gear by moving a cam with a parking rod to lock the parking gear and the parking pawl.

[0003] Other exemplary parking mechanisms are known from US 2013 / 0 284 559 A1, FR 3 060 091 A1 and JP 2021 - 55 762 A. Overview of the invention Problems to be solved by the invention

[0004] In recent years, advances have been made in the miniaturization of drive devices. This has led to a need for a smaller parking mechanism, which is housed within the drive device's casing. In conventional parking mechanisms, a parking rod and a parking pawl are arranged orthogonally to each other, resulting in a problem in that a large amount of space is required within the casing.

[0005] In view of the above circumstances, an objective of the present invention is to provide a parking mechanism and a drive device which can achieve a reduction in size. Means of solving the task

[0006] The problem is solved by a parking mechanism with the features of claim 1, a parking mechanism with the features of claim 4, and a drive device with the features of claim 17. Exemplary embodiments of the invention are defined in the dependent claims. Effects of the invention

[0007] According to one aspect of the present invention, it is possible to provide the drive device and the parking mechanism, which can achieve a reduction in size. Brief description of the drawings Fig. Figure 1 is a diagram which schematically shows a drive device according to one embodiment. Fig. Figure 2 is a perspective view of the parking mechanism according to the embodiment. Fig. Figure 3 is an exploded view of part of the parking mechanism according to the embodiment. Fig. Figure 4 is a cross-sectional view of the parking mechanism in a locked state according to the embodiment. Fig. Figure 5 is a perspective view of the parking mechanism in an unlocked state according to the embodiment. Fig. Figure 6 is a top view of the parking mechanism according to the embodiment when viewed from above. Fig. Figure 7 is a partial cross-sectional view of the parking mechanism according to the embodiment. Embodiments for carrying out the invention

[0008] In the following description, a vertical direction is defined based on a positional relationship when a drive device 1 of the present embodiment is mounted on a vehicle (not shown) positioned on a horizontal road surface. Furthermore, an XYZ coordinate system suitable as a three-dimensional orthogonal coordinate system is shown in the drawings.

[0009] In each drawing, a Z-axis direction corresponds to the vertical direction. A +Z side is a top side in the vertical direction, and a -Z side is a bottom side in the vertical direction. In the present embodiment, the top side in the vertical direction is simply referred to as the "top side," and the bottom side in the vertical direction is simply referred to as the "bottom side." An X-axis direction is a direction perpendicular to the Z-axis direction and is a front-to-rear direction of a vehicle on which the drive device 1 is mounted. In the present embodiment, a +X side is the front of the vehicle, and a -X side is the rear of the vehicle. A Y-axis direction is a direction perpendicular to both the X-axis and Z-axis directions and is a left-to-right direction of the vehicle, i.e., a vehicle width direction.In the present embodiment, a +Y side is the left side of the vehicle and a -Y side is the right side of the vehicle. The Y-axis direction corresponds to an axial direction of a principal axis J1, which will be described later. Each of the front-to-back and left-to-right directions is a horizontal direction perpendicular to the vertical direction. In the present embodiment, the +Y side corresponds to one side in the axial direction and the -Y side corresponds to the other side in the axial direction. The principal axis J1, which is appropriately shown in each drawing, extends in the Y-axis direction, i.e., in the left-to-right direction of the vehicle.

[0010] Fig. Figure 1 is a schematic representation showing the drive device 1. The drive device 1 according to the present embodiment is installed in a vehicle with a motor (e.g., an electric motor) as an energy source, such as a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHV), and an electric vehicle (EV), and is used as the vehicle's energy source.

[0011] The drive device 1 comprises a motor (drive unit) 2, a gearbox (transmission mechanism) 3 with a reduction gear 4 and a differential 5, a parking mechanism 8, a housing 6, and oil O. The motor 2 drives the vehicle. The gearbox 3 is connected to the motor 2. The parking mechanism 8 is attached to the gearbox 3.

[0012] The housing 6 has a motor mounting section 61, which accommodates the motor 2, a gearbox mounting section 62, which accommodates the gearbox unit 3 and the parking mechanism 8, and a partition 61c, which is provided between the motor mounting section 61 and the gearbox mounting section 62.

[0013] The oil O is stored in the transmission intake section 62. The oil O is scraped up by the transmission unit 3 to improve the lubrication of a tooth surface of the transmission unit 3. The oil O can also be supplied to the motor 2. In this case, the oil O cools the motor.

[0014] A collection container (not shown), which collects the oil scraped up by the gear unit 3, can be provided on an inner wall section of the gear mounting section 62. In this case, a flow path for directing the collected oil to each section in the housing 6 is connected to the collection container. The collection container opens upwards in a direction of gravity. For this reason, the position of the drive device 1 with respect to the direction of gravity can be checked during use based on the opening direction of the collection container.

[0015] The motor mounting section 61 is provided with a venting device 69. This means that the housing 6 incorporates the venting device 69. The venting device 69 allows communication between the interior and exterior of the housing 6. The venting device 69 is located on the upper side in the direction of gravity. This prevents oil O from leaking out of the venting device 69. The position of the drive unit 1 relative to gravity can be checked during operation based on the arrangement of the venting device 69.

[0016] The motor 2 has a rotor 2a and a stator 2c. In the present embodiment, the motor 2 is an internal rotor motor. Therefore, the stator 2c surrounds the radially outer side of the rotor 2a. The rotor 2a is arranged so that it can rotate about the main axis J1, which extends in the horizontal direction. The rotor 2a has a motor shaft 2b, which extends axially about the main axis J1.

[0017] The motor shaft 2b rotates about the main axis J1. The motor shaft 2b extends over the motor mounting section 61 and the gearbox mounting section 62 of the housing 6. A left end section of the motor shaft 2b projects into the interior of the gearbox mounting section 62. A first gear 41 of the gearbox 3, which is described below, is attached to the left end section of the motor shaft 2b.

[0018] The gearbox 3 is housed in the gearbox mounting section 62 of the housing 6. The gearbox 3 is connected to the motor 2. More precisely, the gearbox 3 is axially connected to one side of the motor shaft 2b. The gearbox 3 comprises the reduction gear 4 and the differential 5. Torque supplied by the motor 2 is transmitted to the differential 5 via the reduction gear 4.

[0019] The reduction gear 4 is connected to the motor 2. The reduction gear 4 increases the torque delivered by the motor 2 depending on a reduction ratio, while simultaneously reducing the speed of the motor 2. The reduction gear 4 transmits the torque delivered by the motor 2 to the differential 5. The reduction gear 4 comprises a first gear 41, a second gear 42, a third gear 43, and an intermediate shaft 45.

[0020] The first gear 41 is fixed to the left end section of the motor shaft 2b. The first gear 41 rotates with the motor shaft 2b about the main axis J1. The intermediate shaft 45 extends along an intermediate axis J2 parallel to the main axis J1. The intermediate shaft 45 is arranged to rotate about the intermediate axis J2. The second gear 42 and the third gear 43 are fixed to an outer circumferential surface of the intermediate shaft 45 at an axial distance. The second gear 42 and the third gear 43 are connected to each other by the intermediate shaft 45. Both the second gear 42 and the third gear 43 are arranged to rotate about the intermediate axis J2. The second gear 42 is arranged to mesh with the first gear 41. The third gear 43 is arranged so that it meshes with a gear ring 51 of the differential 5, which is described below.

[0021] The torque delivered by the motor 2 is transmitted via the motor shaft 2b, the first gear 41, the second gear 42, the intermediate shaft 45, and the third gear 43, in that order, to the ring gear 51 of the differential 5. The number of gears, the gear ratios, etc., can be modified according to the desired reduction ratio. In the present embodiment, the reduction gear 4 is a parallel-shaft type reduction device in which the central axes of the gears are arranged parallel to each other.

[0022] The differential 5 is connected to the motor 2 via the reduction gear 4. The differential 5 is a device configured to transmit the torque supplied by the motor 2 to a wheel of the vehicle. The differential 5 transmits the same torque to the axles 55 of the right and left wheels, while absorbing any speed difference between the right and left wheels when the vehicle turns. The differential 5 comprises the ring gear 51, a gear housing (not shown), a pair of pinions (not shown), a pinion shaft (not shown), and a pair of ring gears (not shown). The ring gear 51 rotates about a differential shaft J3 parallel to the main axis J1. The torque supplied by the motor 2 is transmitted to the ring gear 51 via the reduction gear 4.

[0023] Note that the axis 55 extends in one direction (i.e., in the width direction of the vehicle) perpendicular to the vehicle's direction of travel. Therefore, the vehicle's direction of travel in a state where the drive device 1 is mounted is estimated based on the extension direction of the axis 55.

[0024] The parking mechanism 8 restricts the operation of the transmission unit 3. The parking mechanism 8 is driven by an electric actuator 9. The electric actuator 9 switches the parking mechanism 8 between a locked state, in which the rotation of the motor shaft 2b is stopped, and an unlocked state, in which the rotation of the motor shaft 2b is permitted. The parking mechanism 8 is in the locked state when the vehicle is in park and in the unlocked state when the vehicle is in a gear other than park. Examples of gears other than park include drive, neutral, reverse, and the like.

[0025] Fig. Figure 2 is a perspective view of parking mechanism 8.

[0026] In the following description, an up-down direction (Z-axis direction) is sometimes referred to as a first direction, and the front-back direction (X-axis direction) of the vehicle is sometimes referred to as a second direction. This means that the first and second directions are perpendicular to each other. The first and second directions are perpendicular to the main axis J1. Furthermore, the bottom side is referred to as one side in the first direction, and the top side as the other side in the first direction.

[0027] The parking mechanism 8 comprises a parking gear 10, a pawl shaft 29, a parking pawl 20, a cam rod 30, a cam 35, a coil spring 39, a sleeve 80, a pawl stop 85, a manual shaft or actuating shaft 90, a flange section 91, an elastic element 95 and the electric actuator 9.

[0028] As in Fig. As shown in Figure 1, the parking gear 10 is fixed to an outer circumferential surface of the motor shaft 2b. The parking gear 10 is arranged axially between the first gear 41 and the partition 61c.

[0029] As in Fig. As shown in Figure 2, the parking gear 10 of the present embodiment has an annular shape around the main axis J1 and is fitted onto the outer circumferential surface of the motor shaft 2b. The parking gear 10 rotates together with the motor shaft 2b. That is, the parking gear 10 rotates around the main axis J1 together with the wheels of the vehicle. Several tooth segments 11 arranged in a circumferential direction are provided on an outer circumference of the parking gear 10. The tooth segment 11 projects radially outwards.

[0030] The pawl shaft 29 extends along a first axis of rotation AX1 parallel to the main axis J1. This means that the pawl shaft 29 is a shaft parallel to the motor shaft 2b. The pawl shaft 29 rotatably supports the parking pawl 20.

[0031] A coil spring 29a is mounted on the pawl shaft 29. The coil spring 29a has a coiled main body and spring end sections extending from both end sections of the main body. The pawl shaft 29 is inserted into the spring end section of the coil spring 29a. The spring end section of the coil spring 29a on one side is engaged with a spring hook section (not shown) provided on an inner surface of the housing 6. The spring end section of the coil spring 29a on the other side is engaged with a spring hook hole 20h provided on the parking pawl 20. The coil spring 29a exerts an elastic force on the parking pawl 20 in a direction in which a distal end is returned towards the sleeve 80.

[0032] The parking pawl 20 is arranged on a side section of the parking gear 10. The parking pawl 20 has the form of a plate whose thickness direction is the axial direction of the main axis J1. The parking pawl 20 has a base end section 22, a parking pawl main body section 21, which extends upwards from the base end section 22, a cam contact section (active section) 23, a stop contact section 24, and an engagement section 25.

[0033] The main body section 21 of the parking pawl extends along the upward-downward direction. Viewed from the axial direction of the main axis J1, the main body section 21 of the parking pawl is located between the parking gear 10 and the sleeve 80. The main body section 21 of the parking pawl has a gear-facing surface 21a, which faces the side of the parking gear 10, and a sleeve-facing surface 21b, which faces the side of the sleeve 80. In the present embodiment, the engagement section 25 is located on the gear-facing surface 21a, and the cam contact section 23 and the stop contact section 24 are located on the sleeve-facing surface 21b. Furthermore, the engagement section 25, the cam contact section 23 and the stopper contact section 24 are arranged in this order from the side of the base end section 22 (i.e. the lower side) towards the distal end side (i.e. the upper side).

[0034] The base end section 22 is provided with a support hole 22h around the first axis of rotation AX1. The pawl shaft 29 is inserted into the support hole 22h. Consequently, the parking pawl 20 is supported on the base end section 22 by the pawl shaft 29 and is rotatable about the first axis of rotation AX1 by the pawl shaft 29. This means that the parking pawl 20 is rotatable about the first axis of rotation AX1.

[0035] The engagement section 25 projects from the gear-facing surface 21a of the parking pawl main body section 21 towards the parking gear 10. The engagement section 25 faces the tooth section 11 of the parking gear 10. When the parking pawl 20 rotates around the pawl shaft 29, the engagement section 25 moves in directions in which it approaches the parking gear 10 and is separated from it. In the locked state of the parking mechanism 8, the engagement section 25 is engaged between the tooth sections 11 of the parking gear 10. This means that, in the locked state, the engagement section 25 is in engagement with the tooth sections 11 of the parking gear 10. In the unlocked state of the parking mechanism 8, the engagement section 25 is retracted from between the tooth sections 11.

[0036] The cam contact section 23 projects from the sleeve-facing surface 21b of the parking pawl main body section 21 towards the sleeve 80. The cam contact section 23 faces an opening in the sleeve 80. The cam contact section 23 points towards the cam rod 30. The cam contact section 23 comes into contact with the cam 35 when the cam 35 moves upwards. In the locked state, the cam contact section 23 is in contact with the cam 35 in the parking mechanism 8, and in the unlocked state, it is separated from the cam 35 in the parking mechanism 8.

[0037] The stop contact section 24 is arranged on the sleeve-facing surface 21b of the parking pawl main body section 21 and on the upper side of the cam contact section 23. The stop contact section 24 has a concave shape that is recessed or set back from the parking pawl main body section 21 in the direction of the parking gear 10. In the locked state, the stop contact section 24 is separated from the pawl stop 85 in the parking mechanism 8, and in the unlocked state, it is in contact with the pawl stop 85 in the parking mechanism 8. Because the stop contact section 24 has the concave shape, which, according to the present embodiment, is recessed in the direction of the parking gear 10, the pawl stop 85 can be located close to the side of the parking gear 10 in the unlocked state. As a result, the parking mechanism 8 can be reduced in size in the second direction (X-axis direction).

[0038] The parking pawl 20 is subjected to a force from the cam 35 in the direction of the parking gear 10 at the cam contact section 23 and engages with the tooth sections 11 of the parking gear 10 at the engagement section 25. Furthermore, the movement of the parking pawl 20 in the direction of the sleeve 80 is limited at the stopper contact section 24.

[0039] The individual sections of the parking pawl 20 of the present embodiment are arranged in the order of the first axis of rotation AX1, the engagement section 25, the cam contact section 23, and the stop contact section 24, from the bottom to the top. According to the present embodiment, the distance between the cam contact section 23 and the first axis of rotation AX1 is greater than the distance between the engagement section 25 and the first axis of rotation AX1. For this reason, the force required to insert the engagement section 25 between the tooth sections 11 can be increased by the force applied by the cam 35 in the cam contact section 23, according to the lever principle, so that the engagement section 25 can be easily inserted between the tooth sections 11.Furthermore, the stopper contact section 24 is provided at a distal end of the parking pawl main body section 21 and can ensure a greater distance from the first axis of rotation AX1 than other sections according to the present embodiment. For this reason, the force exerted by the stopper contact section 24 on the pawl stopper 85 can be reduced in the parking mechanism in the unlocked state, so that the pawl stopper 85 can be made smaller.

[0040] The manual shaft 90 extends along the second axis of rotation AX2. The second axis of rotation AX2 is an axis that extends in the second direction (X-axis direction). Therefore, the manual shaft 90 extends in a direction perpendicular to the motor shaft 2b and the pawl shaft 29.

[0041] The manual shaft 90 extends into and out of the housing 6. The manual shaft 90 is connected to the cam rod 30 via the flange section 91 inside the housing 6. The manual shaft 90 is connected to the electric actuator 9 outside the housing 6. The manual shaft 90 rotates about the second axis of rotation AX2 due to the force of the electric actuator 9.

[0042] Fig. Figure 3 is an exploded view of part of the parking mechanism 8.

[0043] The flange section 91 is fixed to an outer circumferential surface of the manual shaft 90. The flange section 91 extends radially outwards with respect to the second axis of rotation AX2. The flange section 91 has the shape of a plate which runs perpendicular to the second axis of rotation AX2. The flange section 91 rotates together with the manual shaft 90 about the second axis of rotation AX2.

[0044] The flange section 91 has an outer surface 91c, which faces the radially outer side of the second axis of rotation AX2. The outer surface 91c of the flange section 91 is provided with a first groove section 91a and a second groove section 91b. The first groove section 91a and the second groove section 91b are arranged along the circumferential direction of the second axis of rotation AX2. The first groove section 91a and the second groove section 91b are open towards the radially outer side of the second axis of rotation AX2.

[0045] The flange section 91 is provided with a connecting hole 91h penetrating in the thickness direction. A lower end section of the cam rod 30 passes through the connecting hole 91h. Consequently, the lower end section of the cam rod 30 is rotatable about the connecting hole 91h.

[0046] The elastic element 95 comprises a leaf spring section 96 and a roller 97. The leaf spring section 96 has the shape of a plate with a plate surface that points in the axial direction of the main axis J1. The leaf spring section 96 extends in the upward-downward direction. A lower end section of the leaf spring section 96 is fastened to an inner surface of the housing 6 by a screw 98. An upper end section of the leaf spring section 96 is arranged on a lateral section of the manual shaft 90. The upper end section of the leaf spring section 96 can be elastically displaced in the axial direction of the main axis J1, with the lower end section of the leaf spring section 96, which is fastened by the screw 98, serving as the pivot point.

[0047] The leaf spring section 96 has a base section 96a and a pair of arm sections 96b and 96c. The base section 96a is, for example, a lower part of the leaf spring section 96. The base section 96a is provided with a through-hole into which the screw 98 is inserted for fastening the leaf spring section 96 to the housing 6. The pair of arm sections 96b and 96c extends upwards from an upper end section of the base section 96a. The pair of arm sections 96b and 96c are arranged side by side with a gap in the second direction (X-axis direction).

[0048] The roller 97 is rotatable about an axis of rotation extending in the second direction (X-axis direction). The roller 97 is attached to the upper end section of the leaf spring section 96. The roller 97 extends in the second direction (X-axis direction). The roller 97 has a shaft section connecting the upper end sections of the pair of arm sections 96b and 96c, and a rotating section through which the shaft section passes. The roller 97 rotates at the rotating section relative to the leaf spring section 96. The roller 97 is in contact with the outer surface 91c of the flange section 91. When the flange section 91 rotates about the second axis of rotation AX2, the roller 97 moves while rolling on the outer surface 91c between the first groove section 91a and the second groove section 91b.

[0049] The roller 97 can be inserted into the first groove section 91a and the second groove section 91b. The elastic element 95 is thus engaged with the first groove section 91a or the second groove section 91b and positions the flange section 91 about the second axis of rotation AX2.

[0050] The roller 97 is engaged in the first groove section 91a in the parking mechanism 8 when locked and in the second groove section 91b when unlocked. When the parking mechanism 8 is switched between the locked and unlocked states, the roller 97 moves between the first groove section 91a and the second groove section 91b, while the leaf spring section 96 is elastically deformed.

[0051] The cam rod 30 comprises a connecting end section 30a, a connecting section 30b, a main rod body 30c, and a tubular cap 38. A first curved section 31 is provided in the cam rod 30 between the connecting end section 30a and the connecting section 30b, and a second curved section 32 is provided between the connecting section 30b and the main rod body 30c. The cam rod 30 has a rod shape with a circular cross-section, which is bent in the first curved section 31 and the second curved section 32.

[0052] The connecting end section 30a extends along the second direction (X-axis direction). The connecting end section 30a is inserted into the connecting hole 91h of the flange section 91. Two locking projections 33, arranged longitudinally along the connecting end section 30a, are provided on its outer circumference. The two locking projections 33 are located on both sides of the flange section 91. In this way, the connecting end section 30a is connected to the flange section 91. This means that the cam rod 30 is connected to the manual shaft 90 via the flange section 91 at the connecting end section 30a. As described above, the manual shaft 90 is connected to the electric actuator 9 and rotates about the second axis of rotation AX2. The cam rod 30 is driven by the manual shaft 90 in the up-down direction.

[0053] The connecting section 30b extends along the axial direction of the main axis J1. One end of the connecting section 30b is connected to the connecting end section 30a. Furthermore, the other end of the connecting section 30b is connected to a lower end of the main rod body 30c.

[0054] As in Fig. As shown in Figure 2, the main rod body 30c extends along the upward-downward direction (first direction). This means that the cam rod 30 extends along the main rod body 30c in the upward-downward direction. The main rod body 30c passes through the interior of the sleeve 80. This means that the cam rod 30 is inserted into the sleeve 80 at the main rod body 30c. In this way, the main rod body 30c is guided through the sleeve 80. The cam rod 30 moves along the second axis of rotation AX2, further along the upward-downward direction, as the flange section 91 rotates.

[0055] The locking projections 33 are provided on an outer circumferential surface of the rod body 30c. The rod body 30c extends through the helical spring 39, the cam 35, and the tubular cap 38.

[0056] The coil spring 39 is arranged below the cam 35. A lower end of the coil spring 39 is in contact with the locking projection 33. An upper end of the coil spring 39, on the other hand, is in contact with a lower end face of the cam 35. The coil spring 39 is positioned between the locking projection 33 and the cam 35 in a state where it is compressed relative to its natural length. The coil spring 39 exerts an upward force on the cam 35.

[0057] The tubular cap 38 is fixed to the main rod body 30c. The tubular cap 38 is positioned above the cam 35. A lower end of the tubular cap 38 is in contact with an upper end face of the cam 35. The tubular cap 38 limits the upward movement of the cam 35.

[0058] As in Fig. As shown in Figure 3, the cam 35 has an annular shape when viewed from the upward-downward direction. The cam 35 is provided with a through-hole 35h through which the main rod body 30c passes. The inner diameter of the through-hole 35h is larger than the outer diameter of the main rod body 30c. The tubular cap 38 is arranged at an upper end section of the cam 35's range of motion. The tubular cap 38 limits the upward movement of the cam 35. Conversely, a lower end of the cam 35 is in contact with the upper end of the helical spring 39. The helical spring 39 is compressed when the cam 35 moves downward. The cam 35 moves downward relative to the main rod body 30c when it receives a downward force that is greater than the recoil force of the helical spring 39.

[0059] The cam 35 is in contact with the cam contact section 23 of the parking pawl 20 at its outer circumferential surface. A first conical surface 35a and a second conical surface 35b are provided on the outer circumferential surface of the cam 35. The first conical surface 35a and the second conical surface 35b are tapered surfaces, arranged coaxially, each with an outer diameter that gradually decreases from the lower to the upper side. The second conical surface 35b is located above the first conical surface 35a. The outer diameter of a lower end of the second conical surface 35b and the outer diameter of an upper end of the first conical surface 35a are identical. The cone angle of the first conical surface 35a is suitably smaller than the cone angle of the second conical surface 35b.The cone angle of the second conical surface 35b is set to an angle suitable for allowing the cam 35 to be easily released between the sleeve 80 and the cam contact section 23 when transitioning from the locked to the unlocked state. Note that the first conical surface 35a can be a cylindrical surface with a cylindrical shape instead of a conical shape.

[0060] Fig. Figure 4 is a cross-sectional view of the parking mechanism 8 in the locked state, and Fig. Figure 5 is a cross-sectional view of the parking mechanism 8 in the unlocked state.

[0061] The cam 35 is attached to the cam rod 30 and moves together with the cam rod 30 in the up-down direction. In the parking mechanism 8 in the locked state, as shown in Fig. As shown in Figure 4, the cam 35 is located at the upper end section of the movement area and comes into contact with the cam contact section 23 at the first conical surface 35a. On the other hand, in the parking mechanism 8, the components are in the unlocked state, as shown in Figure 4. Fig. Figure 5 shows the cam 35 and the cam rod 30 at a lower end section of the movement range. In this way, the cam 35 comes into contact with the cam contact section 23 of the parking pawl 20 at the second conical surface 35b.

[0062] When the state of the parking mechanism 8 is switched between the locked and unlocked states, the cam 35 moves along the up-down direction with the actuation of the cam rod 30. At this point, the cam 35 slides on the second conical surface 35b on the cam contact section 23. In this way, the cam 35 rotates the parking pawl 20 about the first axis of rotation AX1 to move the engagement section 25 towards the parking gear 10.

[0063] A cam and cam rod of conventional design (e.g., as in JP 2019-158 078 A) are actuated in the same direction as the pivot axis of a parking pawl. This means that the cam and cam rod of the conventional design are actuated in the axial direction of a parking gear. For this reason, a parking mechanism of the conventional design is dimensionally enlarged in the axial direction of the parking gear to ensure sufficient working range for the cam and cam rod.

[0064] In contrast, in the present embodiment, the actuation direction of the cam 35 is perpendicular to the axis of rotation (first axis of rotation AX1) of the parking pawl 20. Therefore, it is not necessary for the parking mechanism 8 to have an actuation mechanism in the axial direction of the main axis J1. This means that, according to the present embodiment, it is possible to suppress any increase in the size of the parking mechanism 8 as a whole in the axial direction of the main axis J1.

[0065] Fig. Figure 6 is a top view of the parking mechanism 8 when viewed from above.

[0066] The sleeve 80 extends along the upward-downward direction. The sleeve 80 has a main sleeve body 82 and a mounting section 83, which is arranged on the opposite side of the parking gear 10 with respect to the main sleeve body 82. The mounting section 83 has a plate shape along a plane perpendicular to the main axis J1.

[0067] The main body of the sleeve 82 has a U-shape when viewed from the upward-downward direction. This means that the sleeve 80 has the U-shape, which is open in the direction of the parking pawl 20. Here, an area surrounded by an inner surface of the main body of the sleeve 82 is referred to as the inner opening section 81. The inner opening section 81 of the main body of the sleeve 82 is open in the direction of the parking pawl 20.

[0068] As in Fig. As shown in Figure 2, the inner opening section 81 of the main body of the sleeve 82 extends along a center line L, which extends in an upward-downward direction. The inner opening section 81 is provided with a small-diameter section 81a, a conical section 81b, and a large-diameter section 81c. The small-diameter section 81a, the conical section 81b, and the large-diameter section 81c are arranged in this order from the top to the bottom along the center line extending in the upward-downward direction. The small-diameter section 81a surrounds the cam rod 30 from the outside. The large-diameter section 81c is a region with a larger diameter relative to the center line L than the small-diameter section 81a. The large-diameter section 81c surrounds the cam 35 from the outside.Therefore, a movement area for the cam 35 is provided on the inside of the large-diameter section 81c. The conical section 81b seamlessly connects the large-diameter section 81c and the small-diameter section 81a.

[0069] As in the Fig. 4 and Fig. As shown in Figure 5, the cam rod 30 and the cam 35 are arranged in the inner opening section 81 of the sleeve 80. The outer circumferential surface of the cam 35 is in contact with an inner surface of the inner opening section 81 of the sleeve 80. Furthermore, a portion of the cam rod 30 can be in contact with the inner surface of the inner opening section 81 of the sleeve 80. In this way, the sleeve 80 supports the cam 35 and the cam rod 30 and guides the actuation of the cam 35 and the cam rod 30 in the upward-downward direction.

[0070] As in Fig. As shown in Figure 2, the pawl stop 85 has a cylindrical shape extending along the axial direction of the main axis J1. The pawl stop 85 is arranged perpendicular to the cam rod 30. The pawl stop 85 is located above the sleeve 80.

[0071] The pawl stopper 85 comes into the unlocked position in the parking mechanism 8, which is in Fig. 5 is shown, in contact with the stopper contact section 24 of the parking pawl 20. In this way, the pawl stopper 85 limits the movement of the parking pawl 20 towards cam rod 30.

[0072] As in Fig. As shown in Figure 6, the pawl stop 85 is positioned on the side of the parking pawl 20 with respect to the cam rod 30 and is arranged so that it is perpendicular to the cam rod 30. Therefore, the pawl stop 85 is located between the parking pawl 20 and the cam rod 30.

[0073] As described above, the cam rod 30 is inserted through the inner opening section 81 of the sleeve 80. Therefore, the movement of the cam rod 30 in a direction other than the opening direction of the sleeve 80, when viewed from the upward-downward direction, is limited by the inner surface of the sleeve 80. According to the present embodiment, the pawl stop 85 is arranged on the opening side of the sleeve 80 relative to the cam rod 30. Therefore, the sleeve 80 and the pawl stop 85 prevent the cam rod 30 from falling over. That is, the pawl stop 85 prevents the cam rod 30 from detaching from the sleeve 80.

[0074] Furthermore, the pawl stopper 85 covers the opening side of the sleeve 80 and prevents the cam rod 30 from moving towards the parking pawl 20 according to the present embodiment, so that it is possible to prevent the cam rod 30 from rattling in the inner opening section 81 of the sleeve 80 due to vibrations or the like.

[0075] In particular, in the present embodiment, the parking mechanism 8 is located in a region of the housing 6 where the oil O is stored, and the sleeve 80 is arranged above the oil surface of the oil O in the direction of gravity. For this reason, rattling between the sleeve 80 of the present embodiment and the cam rod 30, which is not immersed in the oil O, can cause noise. According to the present embodiment, the rattling of the cam rod 30 relative to the sleeve 80 is prevented by the pawl stop 85, so that the noise caused by the rattling can be sufficiently prevented even when it is not immersed in the oil O.

[0076] Furthermore, the cam rod 30 of the present embodiment extends along a direction perpendicular to the second direction (X-axis direction), which is the direction of travel of the vehicle, as shown in Fig. Figure 2 illustrates this. Therefore, the cam rod 30 is likely to experience an inertial force due to the acceleration or deceleration of the vehicle, and the resulting rattle relative to the sleeve 80 will likely cause noise. Since the rattle of the cam rod 30 relative to the sleeve 80 is prevented by the pawl stop 85 according to the present embodiment, the noise caused by the rattle can be sufficiently prevented even in a setup where the inertial force is easily generated by the acceleration or deceleration of the vehicle.

[0077] Note that the cam rod 30 is likely to maintain its inertial force through acceleration or deceleration of the vehicle in a case where the cam rod 30 is inclined relative to the vehicle's direction of travel. Here, the case where it is "inclined relative to the vehicle's direction of travel" means that it is not parallel to the vehicle's direction of travel and includes the case where it extends in a direction perpendicular to the vehicle's direction of travel, as shown in the present embodiment. Note that the inertial force is more readily maintained through acceleration or deceleration of the vehicle in the case where the cam rod 30 extends along the direction perpendicular to the vehicle's direction of travel, as shown in the present embodiment.

[0078] As in Fig. As shown in Figure 6, the cam rod 30 passes through a section which, when viewed from a longitudinal direction of the cam rod 30, is closed by the sleeve 80 and the pawl stop 85. In this way, the cam rod 30 is reliably prevented from coming loose from the sleeve 80.

[0079] Fig. Figure 7 is a cross-sectional view of the parking mechanism 8, which is perpendicular to the longitudinal direction of the cam rod 30 and passes through the pawl stopper 85. The cam rod 30 is located in the Fig. The cross-section shown in Figure 7 is surrounded by the sleeve 80 and the pawl stop 85. This reliably prevents the cam rod 30 from coming loose from the sleeve 80.

[0080] In Fig. In section 7, the axial direction of the principal axis J1 is designated as a third direction D3. A direction perpendicular to the axial direction of the principal axis J1 is a second direction D2. As described above, the second direction D2 is a direction parallel to the X-axis. The third direction D3 is a direction parallel to the Y-axis. As in Fig. As shown in Figure 7, a region enclosed by the inner opening section 81 of the sleeve 80 and the pawl stop 85, viewed from the longitudinal direction of the cam rod 30, is designated as an enclosed region S. Furthermore, a dimension of the enclosed region S in the second direction D2 is designated as a second-direction dimension P2, and a dimension of the enclosed region S in the third direction D3 is designated as a third-direction dimension P3. The diameter d of the cam rod 30 is smaller than both the second-direction dimension P2 and the third-direction dimension P3. The cam rod 30 passes through the enclosed region S, which is enclosed by the sleeve 80 and the pawl stop 85.

[0081] In the present embodiment, when viewed from the longitudinal direction (upward-downward direction) of the cam rod 30, a dimensional difference (P2-d) between the enclosed area S and the cam rod 30 in the second direction D2 (direction perpendicular to the axial direction of the main axis J1) is smaller than a dimensional difference (P3-d) between the enclosed area S and the cam rod 30 in the third direction D3 (i.e. the axial direction of the main axis J1).

[0082] In the present embodiment, a sufficient gap is provided between the cam rod 30 and an inner surface of the enclosed area S to such an extent that the cam 35 can easily enter the inner opening section 81 of the sleeve 80, even in the case where the cam rod 30 is inclined.

[0083] The cam rod 30 faces the inner surface of the sleeve 80 on both sides in the third direction D3. Therefore, the components of the gap in the third direction D3 must be sufficiently large on both sides. Consequently, the dimensional difference (P3-d) between the enclosed area S and the cam rod 30 in the third direction D3 must be relatively large.

[0084] The cam rod 30 faces the pawl stop 85 on one side in the second direction D2 and the sleeve 80 on the other. The components of the gap in the second direction D2 must be of a sufficient size on the side where the sleeve 80 and the cam rod 30 face each other to guide the cam 35 smoothly to the inner opening section 81 of the sleeve 80. On the other hand, interference between the cam 35 and the pawl stop 85 will not be a problem, and it is not necessary to ensure a sufficiently large gap on the other side, where the pawl stop 85 and the cam rod 30 face each other. This point will be described in more detail below.

[0085] In parking mechanism 8 in the locked state, which is in Fig. As shown in Figure 5, the cam 35 reaches an upper end in its range of motion and is closest to the pawl stop 85, but does not come into contact with it. This means that there is no obstruction between the cam 35 and the pawl stop 85 in the range of motion of the cam 35 and the cam rod 30. For this reason, the pawl stop 85 and the cam rod 30 can move in the second direction D2, as shown in Figure 5. Fig. As shown in Figure 7, the components can be arranged close together, and the components of the gap in the second direction D2 can be reduced in size. Consequently, the difference (P2-d) in the dimension between the enclosed area S and the cam rod 30 in the second direction D2 can be made relatively small.

[0086] According to the present embodiment, the pawl stop 85 is arranged on the upper side (the other side in the first direction) of the cam 35 in the locked state. Because the pawl stop 85 is arranged in this way, the pawl stop 85 and the cam 35 do not obstruct each other, and the components of the gap in the second direction D2 can be reduced. Consequently, the parking mechanism 8 can be reduced in size in the second direction D2.

[0087] As in Fig. As shown in Figure 2, the sleeve 80 and the pawl stop 85 are provided separately in the present embodiment. For this reason, the shapes of the sleeve 80 and the pawl stop 85 can be simplified compared to a case in which the pawl stop is provided in part of the sleeve. Consequently, the rigidity of the pawl stop 85 is increased, so that damage can be easily prevented if the parking pawl 20 collides with the pawl stop 85. Furthermore, sufficient strength can be ensured even if the pawl stop 85 is reduced in size, since the shape of the pawl stop 85 can be simplified, which can contribute to a reduction in the size of the parking mechanism 8.

[0088] More precisely, in the present embodiment, the pawl stop 85 has a cylindrical shape. Therefore, there is no edge on an outer circumferential surface of the pawl stop 85, and it is possible to prevent a local concentration of a collision force, even if the pawl stop 85 and the parking pawl 20 collide, thus preventing damage to these pawl stops 85 and the parking pawl 20. Furthermore, the stop contact section 24 of the parking pawl 20 has an arcuate concave shape. Therefore, the stop contact section 24 does not make edge contact with the pawl stop 85. As a result, the concentration of a collision force at the time of collision is prevented, and damage to the pawl stop 85 and the parking pawl 20 can be avoided.

[0089] According to the present embodiment, the sleeve 80 and the pawl stop 85 are separate elements. Therefore, it is possible to increase the degree of freedom of arrangement of the pawl stop 85 compared to a case in which the sleeve 80 and the pawl stop 85 are designed as a single element. The pawl stop 85 of the present embodiment is located on the upper side (the other side in the first direction) of the sleeve 80. Therefore, the pawl stop 85 can be arranged in such a way that it is reliably separated from the working area of ​​the cam 35, compared to a case in which the pawl stop 85 is arranged on the lower side of the sleeve 80.As a result, the pawl stopper 85 can be made to hardly affect the cam 35, even when brought close to the cam rod 30, and the parking mechanism 8 can be reduced in size in the second direction (X-axis direction).

[0090] As in the Fig. 4 and Fig. As shown in Figure 5, the total range of a position of the sleeve 80 in the upward-downward direction overlaps with a position of the parking pawl 20 in the upward-downward direction. For this reason, the sleeve 80 does not protrude either upwards or downwards relative to the parking pawl 20, and the dimension of the parking mechanism 8 in the upward-downward direction can be reduced.

[0091] Next, a fastening structure for the sleeve 80 and the pawl stopper 85 in relation to the housing 6 is described.

[0092] As in Fig. As shown in Figure 6, a screw hole 6a and an insertion hole 6b are provided in the inner surface of the housing 6. Both the screw hole 6a and the insertion hole 6b extend parallel to the main axis J1 and open in the same direction. The mounting section 83 of the sleeve 80 is provided with a mounting hole 83h, which penetrates in one direction of the plate thickness. A mounting screw 84, which is to be fastened to the screw hole 6a, is inserted into the mounting hole 83h. The sleeve 80 is fastened to the inner surface of the housing 6 by the mounting screw 84, which extends parallel to the main axis J1. The pawl stop 85 is also inserted into the insertion hole 6b. This fixes the pawl stop 85 to the inner surface of the housing 6.

[0093] As in Fig.As shown in Figure 2, the sleeve body 82 and the pawl stop 85 are arranged side by side in a clockwise direction when viewed from the insertion direction of the fastening screw 84. Furthermore, the sleeve body 82 and the pawl stop 85 are in contact with each other. In other words, the sleeve 80 comes into contact with the pawl stop 85 in a direction of rotation when the fastening screw 84 is tightened. According to the present embodiment, the sleeve 80 can be positioned in the direction of rotation of the fastening screw 84 by tightening the single fastening screw 84. Therefore, multiple fastening screws 84 are not required, the number of parts of the parking mechanism 8 can be reduced, and the assembly process of the parking mechanism 8 can be simplified.In the present embodiment, the housing 6 accommodates the respective structures of the parking mechanism 8, such as the sleeve 80 and the pawl stop 85. The housing 6 can thus be considered part of the parking mechanism 8. In this case, the parking mechanism 8 comprises the housing 6.

[0094] In the present embodiment, the pawl shaft 29 and the manual shaft 90 are arranged on the lower side (one side in the first direction) of the sleeve 80. The parking pawl 20 rotates around the pawl shaft 29 in a circumferential direction, and the flange section 91 rotates around the manual shaft 90 in a circumferential direction. According to the present embodiment, the drive sections of the parking mechanism 8 are arranged so that they are concentrated on the lower side of the sleeve 80. It is necessary to provide sufficient space around the drive section to prevent interference. Because the drive sections are arranged in a concentrated manner in the present embodiment, it is unnecessary to disperse the spaces to prevent interference, and the overall housing space for the parking mechanism 8 can be reduced.

[0095] Although numerous embodiments of the present invention are described above, the structures in these embodiments and combinations thereof are examples, and therefore additions, removals, replacements, and further modifications within a given area are possible without departing from the essence of the present invention. Furthermore, the present invention is not limited by the embodiments described.

[0096] For example, a configuration in which the manual shaft is arranged above the parking pawl can also be considered a different configuration from the embodiment described above. In this case, the position of the cam and the position of the pawl stop can be arranged such that they are vertically inverted compared to the embodiment described above. Furthermore, any of the cam contact section, the stop contact section, and the engagement section 25 of the parking pawl can be arranged on the opposite side with the axis of rotation intersecting it in the longitudinal direction of the parking pawl. In this way, the relative positional relationship between each section (cam contact section, stop contact section, and engagement section) of the parking pawl, the sleeve, the cam, and the like can be suitably modified.

[0097] Furthermore, the drive unit is not necessarily the (electric) motor. The drive unit could, for example, be an internal combustion engine. The structure of the transmission (transmission mechanism) is not specifically restricted. The configurations and methods described above can be combined as desired, provided that no mutual contradiction arises. Description of the reference symbols 1 Drive device 2 Motor (drive unit) 3 Gearbox (transmission mechanism) 6 cases 8 Parking mechanism 10 Parking gear 11th tooth section 20 parking lock latch 21 Parking lock latch main body section 23 Cam contact section 24 Stopper contact section 25 Intervention section 29 pawl shaft 30 cam rod 35 cams 80 sleeve 84 Mounting screw 85 pawl stoppers 90 Manual shaft (actuating shaft) 98 screw AX1 First axis of rotation AX2 Second axis of rotation J1 Main axis O Oil S Enclosed area

Claims

[1] A parking mechanism (8) comprising: a parking gear (10) which rotates together with a wheel of a vehicle around a main axis (J1), a parking pawl (20) which has an engagement section (25) which faces a tooth section (11) of the parking gear (10) and which is rotatable about a first axis of rotation (AX1) parallel to the main axis (J1), a cam rod (30) which extends along a first direction which is perpendicular to the main axis (J1) and is actuated along the first direction, a cam (35) which is attached to the cam rod (30) is in contact with a cam contact section (23) of the parking pawl (20) and moves along the first direction with the actuation of the cam rod (30) to rotate the parking pawl (20) about the first axis of rotation (AX1) and to move the engagement section (25) in the direction of the parking gear (10), a U-shaped sleeve (80) which is open in the direction of the parking lock latch (20) and supports the cam (35), and a pawl stopper (85) which comes into contact with a stopper contact section (24) of the parking pawl (20) to limit the movement of the parking pawl (20) towards the cam rod (30), wherein the cam rod (30) is inserted into the sleeve (80), and the pawl stopper (85) is arranged between the parking pawl (20) and the cam rod (30), wherein the parking mechanism (8) further comprises a housing (6) which contains the sleeve (80) and the pawl stopper (85), wherein the pawl stopper (85) is attached to an inner surface of the housing (6), wherein the sleeve (80) is fastened to the inner surface of the housing (6) by a single fastening screw (84) which extends parallel to the main axis (J1), and the sleeve (80) comes into contact with the pawl stopper (85) in a direction of rotation when the fastening screw (84) is tightened. [2] The parking mechanism (8) according to claim 1, wherein the pawl stopper (85) is arranged on another side of the cam (35) in the first direction in a locked state in which the engagement section (25) engages with the tooth section (11) of the parking gear (10). [3] The parking mechanism (8) according to claim 2, wherein the cam rod (30) passes through an enclosed area (S) which, when viewed from a longitudinal direction of the cam rod (30), is surrounded by the sleeve (80) and the pawl stopper (85), and a dimensional difference (P2-d) between a dimension (P2) of the enclosed area (S) and a diameter (d) of the cam rod (30) in a direction (D2) which is perpendicular to an axial direction (D3) of the principal axis (J1), when viewed from the longitudinal direction of the cam rod (30) is smaller than a Dimensional difference (P3-d) between a dimension (P3) of the enclosed area (S) and the diameter (d) of the cam rod (30) in the axial direction (D3) of the main axis (J1). [4] A parking mechanism (8) comprising: a parking gear (10) which rotates together with a wheel of a vehicle around a main axis (J1), a parking pawl (20) which has an engagement section (25) which faces a tooth section (11) of the parking gear (10) and which is rotatable about a first axis of rotation (AX1) parallel to the main axis (J1), a cam rod (30) which extends along a first direction which is perpendicular to the main axis (J1) and is actuated along the first direction, a cam (35) which is attached to the cam rod (30) is in contact with a cam contact section (23) of the parking pawl (20) and moves along the first direction with the actuation of the cam rod (30) to rotate the parking pawl (20) about the first axis of rotation (AX1) and to move the engagement section (25) in the direction of the parking gear (10), a U-shaped sleeve (80) which is open in the direction of the parking lock latch (20) and supports the cam (35), and a pawl stopper (85) which comes into contact with a stopper contact section (24) of the parking pawl (20) to limit the movement of the parking pawl (20) towards the cam rod (30), wherein the cam rod (30) is inserted into the sleeve (80), and the pawl stopper (85) is arranged between the parking pawl (20) and the cam rod (30), wherein the pawl stopper (85) is in a locked state in which the engagement section (25) is engaged with the tooth section (11) of the parking gear (10), is arranged on another side of the cam (35) in the first direction wherein the cam rod (30) passes through an enclosed area (S) which, when viewed from a longitudinal direction of the cam rod (30), is surrounded by the sleeve (80) and the pawl stopper (85), and a dimensional difference (P2-d) between a dimension (P2) of the enclosed area (S) and a diameter (d) of the cam rod (30) in a direction (D2) which is perpendicular to an axial direction (D3) of the principal axis (J1), when viewed from the longitudinal direction of the cam rod (30) is smaller than a dimensional difference (P3-d) between a dimension (P3) of the enclosed area (S) and the diameter (d) of the cam rod (30) in the axial direction (D3) of the principal axis (J1). [5] The parking mechanism (8) according to claim 4, which further comprises a housing (6) which contains the sleeve (80) and the pawl stopper (85), wherein the pawl stopper (85) is attached to an inner surface of the housing (6), the sleeve (80) is attached to the inner surface of the housing (6) by a fastening screw (84) which extends parallel to the main axis (J1), and the sleeve (80) comes into contact with the pawl stopper (85) in a direction of rotation when the fastening screw (84) is tightened. [6] The parking mechanism (8) according to any one of claims 1 to 5, wherein the cam rod (30) passes through a region (S) which, when viewed from a longitudinal direction of the cam rod (30), is closed by the sleeve (80) and the pawl stopper (85). [7] The parking mechanism (8) according to any one of claims 1 to 6, wherein the cam rod (30) is surrounded by the sleeve (80) and the pawl stop (85) in a cross-section which is perpendicular to a longitudinal direction of the cam rod (30) and passes through the pawl stop (85). [8] The parking mechanism (8) according to any one of claims 1 to 7, further comprising: a pawl shaft (29) which extends along the first axis of rotation (AX1) and supports the parking pawl (20); and a manual shaft (90) which drives the cam rod (30) along the first direction by rotation about a second axis of rotation (AX2) which is perpendicular to the first direction, wherein the pawl shaft (29) and the manual shaft (90) are arranged on one side of the sleeve (80) in the first direction. [9] The parking mechanism (8) according to claim 8, wherein the pawl stopper (85) is arranged on another side in the first direction of the sleeve (80). [10] The parking mechanism (8) according to one of claims 6 to 9, wherein each section of the parking pawl (20) is arranged in a sequence from one side to the other in the first direction from the first axis of rotation (AX1), the engagement section (25), the cam contact section (23) and the stopper contact section (24). [11] The parking mechanism (8) according to any one of claims 1 to 10, wherein the parking lock latch (20) has a parking lock latch main body section (21), and the stopper contact section (24) has a concave shape which is recessed from the parking pawl main body section (21) towards the parking gear (10), where optionally the stopper contact section (24) has an arc-shaped concave form. [12] The parking mechanism (8) according to any one of claims 1 to 11, wherein the parking lock latch (20) has a parking lock latch main body section (21), and the cam contact section (23) protrudes from the parking pawl main body section (21) in the direction of the sleeve (80). [13] The parking mechanism (8) according to any one of claims 1 to 12, wherein a total area of ​​a position of the sleeve (80) in the first direction overlaps with a position of the parking pawl (20) in the first direction. [14] The parking mechanism (8) according to any one of claims 1 to 13, wherein the cam rod (30) extends in a direction which is inclined with respect to a direction of travel of the vehicle. [15] The parking mechanism (8) according to one of claims 1 to 14, which is housed in an area in which oil (O) is stored, wherein the sleeve (80) is arranged above an oil surface of the oil (O) in a direction of gravity. [16] The parking mechanism (8) according to any one of claims 1 to 15, wherein the pawl stopper (85) has a cylindrical shape. [17] A drive device (1) comprising: the parking mechanism (8) according to any one of claims 1 to 16; a drive unit (2) which propels the vehicle; and a transmission mechanism (3) which is connected to the drive unit (2), wherein the parking mechanism (8) is attached to the transmission mechanism (3).

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