CN114321357A - Parking mechanism and drive device - Google Patents

Abstract

The present invention provides a parking mechanism and a driving device, wherein one mode of the parking mechanism comprises the following components: a driven shaft that is rotatable about a central axis extending in a predetermined direction; a movable portion that moves in accordance with rotation of a driven shaft; a stopper member having a claw portion and moving along with the movement of the movable portion; and a parking gear engageable with the pawl portion. The position of the stopper member is switched to a parking position where the claw portion is engaged with the parking gear and a non-parking position where the claw portion is separated from the parking gear in accordance with the movement of the movable portion. The driven shaft is connected to a drive source for rotating the driven shaft at a portion located on one side in a predetermined direction with respect to the movable portion. The driven shaft has a first supported portion supported rotatably about a central axis. The first supported portion is located on the other side in the predetermined direction with respect to the movable portion.

Description

Parking mechanism and drive device

Technical Field

The present invention relates to a parking mechanism and a driving device.

Background

For example, patent document 1 describes a parking mechanism mounted on a vehicle.

Documents of the prior art

Patent document

Patent document 1: chinese utility model patent No. 205001503 specification

Disclosure of Invention

The parking lock mechanism is sometimes driven by rotating the driven shaft by an electric actuator. In this case, there is a possibility that a load applied to the driven shaft may cause a problem such as deformation of the driven shaft. Therefore, malfunction may occur in the operation of the parking lock mechanism.

In view of the above, it is an object of the present invention to provide a parking mechanism having a structure capable of improving reliability, and a driving apparatus including such a parking mechanism.

One embodiment of the parking mechanism of the present invention includes: a driven shaft that is rotatable about a central axis extending in a predetermined direction; a movable portion that moves in accordance with rotation of the driven shaft; a stopper member having a claw portion and moving in accordance with movement of the movable portion; and a parking gear engageable with the claw portion. The position of the stopper member is switched to a parking position where the claw portion is engaged with the parking gear and a non-parking position where the claw portion is separated from the parking gear in accordance with the movement of the movable portion. A portion of the driven shaft located on one side in the predetermined direction with respect to the movable portion is connected to a drive source that rotates the driven shaft. The driven shaft includes a first supported portion supported rotatably about the central axis. The first supported portion is located on the other side in the predetermined direction with respect to the movable portion.

One aspect of the drive device according to the present invention is a drive device mounted on a vehicle, including a power unit configured to drive the drive device, a transmission mechanism unit connected to the power unit, and the parking mechanism mounted on the transmission mechanism unit.

According to one embodiment of the present invention, the reliability of the parking mechanism can be improved.

According to one aspect of the present invention, the reliability of the parking mechanism can be improved in the driving device.

Drawings

Fig. 1 is a sectional view schematically showing a driving device of the present embodiment.

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

Fig. 3 is a perspective view showing the parking mechanism of the present embodiment.

Fig. 4 is an exploded perspective view showing a part of the parking mechanism of the present embodiment.

Fig. 5 is a perspective view showing the first movable member of the present embodiment.

Fig. 6 is a right side view of the parking mechanism of the present embodiment.

Description of the symbols

A 10 … parking mechanism, a 20 … driven shaft, a 22b … second supported portion, a 24a … first supported portion, a 30 … movable portion, a 31 … first movable member, a 32 … second movable member, a 33 … first elastic member, a 34 … fixed portion, a 35c … outer edge portion, a 35d … first groove portion, a 35e … second groove portion, a 35h … groove portion, a 36e … through hole, a 37a … cam surface, a 40 … stopper member, a 42 … claw portion, a 50 … parking gear, a 60 … second elastic member, an 80a … power portion, an 80b … transmission mechanism portion, an 83a … first gear, an 83b … second gear, an 85 … housing, an 87 … first housing member, a 87b … first hole portion, an 88 … second housing member, an 88d … second hole portion, a 100 b 100 … driving device, and a 4 … central axis.

Detailed Description

The figures show an X-axis, a Y-axis orthogonal to the X-axis, and a Z-axis orthogonal to the X-axis and the Y-axis. In the following description, a direction parallel to the Z axis is referred to as "vertical direction", a direction parallel to the Y axis is referred to as "horizontal direction", and a direction parallel to the X axis is referred to as "front-rear direction". The up-down direction, the left-right direction, and the front-rear direction are directions orthogonal to each other. The vertical direction is, for example, the vertical direction of a vehicle on which the drive device 100 shown in fig. 1 is mounted. The left-right direction is, for example, the left-right direction of a vehicle on which the drive device 100 is mounted. The front-rear direction is, for example, the front-rear direction of a vehicle on which the drive device 100 is mounted.

In the vertical direction, a positive side of the Z-axis arrow is referred to as an upper side, and a negative side opposite to the Z-axis arrow is referred to as a lower side. In the left-right direction, a positive side of the Y-axis arrow is referred to as a left side, and a negative side opposite to the side of the Y-axis arrow is referred to as a right side. In the front-rear direction, the positive side of the X-axis arrow is referred to as the front side, and the negative side opposite to the side of the X-axis arrow is referred to as the rear side.

In the following embodiments, the left-right direction corresponds to the "predetermined direction". The left side corresponds to "one side in a predetermined direction", and the right side corresponds to "the other side in the predetermined direction". The vertical direction, the horizontal direction, the front-rear direction, the upper side, the lower side, the left side, the right side, the front side, and the rear side are only names for explaining the arrangement relationship of the respective portions, and the actual arrangement relationship may be an arrangement relationship other than the arrangement relationship indicated by these names.

The drive device 100 of the present embodiment shown in fig. 1 is a drive device that is mounted on a vehicle and rotates the axle 86. As shown in fig. 1, the drive device 100 includes a power unit 80a, a transmission mechanism unit 80b, a parking mechanism 10, a housing 85, and an electric actuator 90.

The housing 85 internally houses the power unit 80a, the transmission mechanism 80b, and the parking mechanism 10. The housing 85 includes a first housing portion 85a that houses the power unit 80a, and a second housing portion 85b that houses the transmission mechanism 80b and the parking mechanism 10. The second receiving portion 85b is connected to the left side of the first receiving portion 85a, for example. For example, oil O is stored in the first housing portion 85a and the second housing portion 85 b.

As shown in fig. 2, the housing 85 has a first housing member 87 and a second housing member 88. The first housing member 87 and the second housing member 88 are members different from each other. The second housing member 88 is fixed to the first housing member 87. In the present embodiment, the second housing portion 85b is formed by fixing the first housing member 87 and the second housing member 88. The second housing member 88 is located, for example, on the left side of the first housing member 87.

The first housing member 87 has a partition wall portion 87 a. The partition wall 87a is a wall that partitions the inside of the first housing portion 85a and the inside of the second housing portion 85b in the left-right direction. The partition wall 87a is located, for example, on the right side of the parking mechanism 10. The left surface of the partition wall 87a constitutes at least a part of the right surface of the inner surface of the second housing portion 85 b.

The first housing member 87 has a first hole portion 87 b. That is, the housing 85 has the first hole 87 b. The first hole 87b is, for example, a hole recessed from the left side surface of the partition wall 87a toward the right side and having a bottom on the right side. Although not shown, first hole 87b has a circular shape centered on central axis J4, for example, when viewed in the left-right direction. In the present embodiment, the central axis J4 extends in the left-right direction. The central axis J4 is, for example, parallel to the power axis J1.

The second housing member 88 is, for example, a box-shaped member opened to the right. For example, the right opening of the second housing member 88 is closed by the partition wall portion 87 a. The second housing member 88 has a left side wall portion 88a and a coupling tube portion 88 b. The left side wall portion 88a is located, for example, on the left side of the portion of the parking mechanism 10 located in the second receiving portion 85 b. The left side wall portion 88a has a recessed portion 88c recessed leftward from the right side of the left side wall portion 88 a. Although not shown, the recess 88c has a circular shape centered on the central axis J4 when viewed from the left-right direction, for example.

The coupling tube portion 88b projects leftward from the left side wall portion 88 a. The coupling cylinder portion 88b opens to the left. The coupling tube portion 88b is, for example, cylindrical with the center axis J4 as the center. The oil seal 71 is held inside the coupling cylindrical portion 88 b. The oil seal 71 is annular and surrounds the drive shaft 20 described later.

The second housing member 88 has a second hole portion 88 d. That is, the housing 85 has the second hole portion 88 d. The second hole portion 88d is recessed from the right side surface of the left side wall portion 88a toward the left side, for example. In more detail, the second hole portion 88d is recessed to the left side from the bottom surface of the recessed portion 88c, for example. The bottom surface of the recess 88c is a surface located on the left side and facing the right side of the inner surface of the recess 88 c. Although not shown, second hole portion 88d has a circular shape centered on central axis J4, for example, when viewed in the left-right direction. The second hole 88d penetrates the left side wall 88a in the left-right direction, for example, and connects the inside of the second receiving portion 85b and the inside of the coupling tube portion 88 b. The inner diameter of the second hole 88d is smaller than the inner diameter of the first hole 87b, the inner diameter of the recess 88c, and the inner diameter of the connecting tube 88b, for example.

In the present embodiment, the electric actuator 90 is a drive source that drives the parking mechanism 10. As shown in fig. 1, the electric actuator 90 is located outside the housing 85, for example. The electric actuator 90 is fixed to an outer surface of the second receiving portion 85b, for example. The electric actuator 90 is coupled to the coupling tube portion 88b, for example.

The power unit 80a is a part for driving the driving device 100. In the present embodiment, the power unit 80a is an electric motor. The power unit 80a includes a rotor 81 and a stator 82. The rotor 81 has a power shaft 81a rotatable about a power axis J1. The power axis J1 extends, for example, in the left-right direction. The power shaft 81a is, for example, a columnar shape extending in the left-right direction with the power axis J1 as a center. For example, the power shaft 81a extends leftward from the inside of the first receiving portion 85a, penetrates the partition wall 87a in the left-right direction, and protrudes into the inside of the second receiving portion 85 b.

The transmission mechanism 80b is connected to the power unit 80 a. The transmission mechanism portion 80b includes a reduction gear unit 83 and a differential gear unit 84. The reduction gear 83 is connected to the power shaft 81 a. The reduction gear unit 83 reduces the rotation speed of the power unit 80a, and increases the torque output from the power unit 80a according to the reduction gear ratio. The reduction gear unit 83 transmits the torque output from the power unit 80a to the differential gear unit 84. The reduction gear unit 83 has a first gear 83a, a second gear 83b, a third gear 83c, and an intermediate shaft 83 d. That is, the transmission mechanism 80b has a first gear 83a and a second gear 83 b.

The first gear 83a is fixed to the outer peripheral surface of the portion of the power shaft 81a that protrudes into the second receiving portion 85 b. Thereby, the first gear 83a is fixed to the power unit 80 a. The intermediate shaft 83d extends in the left-right direction around the intermediate axis J2, for example. The intermediate axis J2 is, for example, parallel to the power axis J1. The intermediate axis J2 is located, for example, at a lower side than the power axis J1. The second gear 83b and the third gear 83c are fixed to the outer peripheral surface of the intermediate shaft 83 d. The second gear 83b and the third gear 83c are connected via an intermediate shaft 83 d. The second gear 83b meshes with the first gear 83 a. The intermediate shaft 83d, the second gear 83b, and the third gear 83c are rotatable about an intermediate axis J2.

The differential gear 84 is connected to the reduction gear 83. The differential gear 84 rotates an axle 86. The shaft 86 rotates, for example, about an output axis J3 extending parallel to the power axis J1. The output axis J3 is disposed at a position offset from the power axis J1 and the intermediate axis J2, for example, when viewed in the left-right direction. The differential device 84 has a ring gear 84 a. The ring gear 84a meshes with the third gear 83 c. The torque output from the power portion 80a is transmitted to the ring gear 84a via the reduction gear 83. The lower end of the ring gear 84a is immersed in the oil O stored in the second housing portion 85 b. The oil O is kicked up by the rotation of the ring gear 84 a. The lifted oil O is supplied to the reduction gear unit 83 and the differential unit 84 as lubricating oil, for example.

In the present embodiment, the parking mechanism 10 is driven by the electric actuator 90 based on a shift operation of the vehicle. The state of the parking mechanism 10 is switched between a locked state in which rotation of the axle 86 is prevented and an unlocked state in which rotation of the axle 86 is permitted by the electric actuator 90 as a power source. When the gear of the vehicle is at a stop, the parking mechanism 10 is in the locked state, and when the gear of the vehicle is not at a stop, the parking mechanism 10 is in the unlocked state. The case where the gear of the vehicle is not in a parking state includes, for example, a case where the gear of the vehicle is in a driving state, a neutral state, a reverse state, and the like. As shown in fig. 3, the parking mechanism 10 includes a driven shaft 20, a movable portion 30, a stopper member 40, a parking gear 50, and a second elastic member 60.

The driven shaft 20 is rotatable about a central axis J4 extending in the left-right direction. The driven shaft 20 is, for example, a columnar shape extending in the left-right direction with the center axis J4 as the center. In the following description of the parking mechanism 10, the radial direction about the center axis J4 may be simply referred to as the "radial direction", and the circumferential direction around the center axis J4 may be simply referred to as the "circumferential direction". In each figure, the circumferential direction is indicated by an arrow θ as appropriate. One side (θ side) facing the arrow θ, which advances clockwise around the central axis J4 when viewed from the right side in the circumferential direction, is referred to as "one circumferential side", and one side (opposite to the side facing the arrow θ), which advances counterclockwise around the central axis J4 when viewed from the right side in the circumferential direction, is referred to as "the other circumferential side".

As shown in fig. 2, the driven shaft 20 projects from the inside of the second receiving portion 85b to the outside of the housing 85 through the inside of the recess 88c, the inside of the second hole portion 88d, and the inside of the coupling cylinder portion 88b, for example. As shown in fig. 2 and 4, the driven shaft 20 includes a coupled portion 21, a large diameter portion 22, an intermediate diameter portion 23, and a small diameter portion 24. The coupled portion 21, the large diameter portion 22, the intermediate diameter portion 23, and the small diameter portion 24 are connected in this order from the left side to the right side.

The coupled portion 21 is a portion coupled to the electric actuator 90. As shown in fig. 2, the coupled portion 21 projects to the outside of the housing 85, for example. The left end of the coupled portion 21 is, for example, the left end of the driven shaft 20. The coupled portion 21 has, for example, a spline portion on its outer peripheral surface. The coupled portion 21 is coupled to the electric actuator 90 by fitting a spline portion to a spline groove provided in an output portion of the electric actuator 90, for example.

In the present embodiment, the coupled part 21 is a part of the driven shaft 20 located on the left side of the movable part 30. That is, in the present embodiment, the driven shaft 20 is connected to the electric actuator 90, which is the driving source for rotating the driven shaft 20, through the connected portion 21, which is the portion located on the left side of the movable portion 30.

The large diameter portion 22 is connected to the right side of the coupled portion 21. The large diameter portion 22 has an outer diameter larger than that of the coupled portion 21, for example. The large diameter portion 22 has a dimension in the left-right direction larger than, for example, the dimension of the coupled portion 21 in the left-right direction. The large diameter portion 22 includes a sealed portion 22a and a second supported portion 22 b. That is, the driven shaft 20 includes a sealed portion 22a and a second supported portion 22 b.

The sealed portion 22a is, for example, a left side portion of the large diameter portion 22. The sealed portion 22a is located inside the coupling tube portion 88b, for example. The outer peripheral surface of the sealed portion 22a contacts the inner peripheral surface of the oil seal 71. The oil seal 71 seals the gap between the outer peripheral surface of the sealed portion 22a and the inner peripheral surface of the connecting cylinder portion 88 b.

The second supported portion 22b is, for example, a right portion of the large diameter portion 22. The second supported portion 22b is connected to the right side of the sealed portion 22 a. The second supported portion 22b is inserted into the second hole portion 88 d. The outer diameter of the second supported portion 22b is slightly smaller than the inner diameter of the second hole portion 88 d. In the present embodiment, the second supported portion 22b is fitted into the second hole portion 88d with a clearance. Thus, the second support portion 22b is rotatably supported around the central axis J4 by the inner peripheral surface of the second hole portion 88 d. That is, in the present embodiment, second hole 88d functions as a bearing portion that rotatably supports second supported portion 22b about central axis J4. The second supported portion 22b is located between the coupled portion 21, which is a portion of the driven shaft 20 to which the electric actuator 90 as a driving source is coupled, and the movable portion 30 in the left-right direction.

The middle diameter portion 23 is connected to the right side of the large diameter portion 22. The outer diameter of the intermediate diameter portion 23 is smaller than the outer diameter of the large diameter portion 22, for example. The dimension of the middle diameter portion 23 in the left-right direction is larger than the dimension of the large diameter portion 22 in the left-right direction, for example. The intermediate diameter portion 23 is located inside the second receiving portion 85b, for example. The left end of the intermediate diameter portion 23 is located inside the recess 88c, for example. The intermediate diameter portion 23 has a pin stopper hole 23a that radially penetrates the intermediate diameter portion 23. The pin stopper hole 23a is provided in a portion of the intermediate diameter portion 23 on the left side, for example. As shown in fig. 4, the pin stopper hole 23a is, for example, a circular hole.

The small diameter portion 24 is connected to the right side of the medium diameter portion 23. The small diameter portion 24 has an outer diameter smaller than the outer diameter of the medium diameter portion 23 and the outer diameter of the coupled portion 21, for example. As shown in fig. 2, the small-diameter portion 24 has a first supported portion 24 a. That is, the driven shaft 20 has the first supported portion 24 a. The first supported portion 24a is, for example, a right portion of the small diameter portion 24. The right end of the first supported portion 24a is, for example, the right end of the driven shaft 20. The first supported portion 24a is located on the right side of the movable portion 30.

The first supported portion 24a is inserted into the first hole 87 b. The outer diameter of the first supported portion 24a is slightly smaller than the inner diameter of the first hole 87 b. In the present embodiment, the first supported portion 24a is fitted into the first hole 87b with a gap. Thereby, the first supported portion 24a is rotatably supported around the central axis J4 by the inner peripheral surface of the first hole 87 b. That is, in the present embodiment, first hole 87b functions as a bearing portion that rotatably supports first supported portion 24a about central axis J4.

The movable portion 30 is a portion that moves along with the rotation of the driven shaft 20. In the present embodiment, the movable portion 30 rotates about the center axis J4 in accordance with the rotation of the driven shaft 20. As shown in fig. 4, the movable portion 30 has a first movable member 31, a second movable member 32, and a first elastic member 33.

The first movable member 31 has a fixed portion 34 and a flange portion 35. The fixed portion 34 and the flange portion 35 are, for example, members different from each other, and are fixed to each other. The fixed portion 34 is, for example, substantially cylindrical with the center axis J4 as the center. The fixed portion 34 is open on both sides in the left-right direction. As shown in fig. 2, the intermediate diameter portion 23 of the driven shaft 20 penetrates in the right-left direction inside the fixed portion 34. The fixed portion 34 has a first portion 34a and a second portion 34 b.

The first portion 34a is, for example, a left side portion of the fixed portion 34. The second portion 34b is, for example, a right portion of the fixed portion 34. The second portion 34b is connected to the right side of the first portion 34 a. The outer diameter of the second portion 34b is smaller than the outer diameter of the first portion 34 a. A step having a step surface 34e is provided between the first portion 34a and the second portion 34b in the left-right direction. The stepped surface 34e is, for example, a surface perpendicular to the left-right direction toward the right side, and is an end surface on the right side of the first portion 34 a.

The first portion 34a has a pin stop hole 34 c. The pin stopper hole 34c is provided in a pair radially sandwiching the center axis J4. The pin stopper hole 34c penetrates from the inner peripheral surface to the outer peripheral surface of the first portion 34 a. The pin stopper hole 34c is, for example, a circular-shaped hole. The first portion 34a is fixed to the intermediate diameter portion 23 by, for example, a pin 38 penetrating the pin stopper hole 34 c. Thereby, the fixed portion 34 is fixed to the driven shaft 20, and the first movable member 31 is fixed to the driven shaft 20.

The pin 38 is cylindrical extending in the radial direction centering on the center axis J4. The pin 38 extends from one pin stopper hole 34c of the pair of pin stopper holes 34c of the fixed portion 34 through the pin stopper hole 23a of the driven shaft 20 to the other pin stopper hole 34c of the pair of pin stopper holes 34 c. The pin 38 is fitted into and fixed to each of the pin stopper holes 23a and 34 c. The pin 38 is fitted into each of the pin stopper holes 23a, 34c, whereby the relative rotation and the relative movement in the left-right direction of the driven shaft 20 and the first movable member 31 about the central axis J4 are prevented. As shown in fig. 4, a pair of flat surfaces 34d is provided on the outer peripheral surface of the first portion 34 a. The pair of flat surfaces 34d are rectangular surfaces orthogonal to the radial direction, and are disposed on opposite sides with respect to the central axis J4.

As shown in fig. 2, a washer 70 is provided between the left end of the fixed portion 34 and the bottom surface of the recess 88 c. The washer 70 is, for example, annular and surrounds the intermediate diameter portion 23 of the driven shaft 20 with the center axis J4 as the center. The gasket 70 has a plate-like shape with its plate surface facing in the left-right direction. The inner diameter of the washer 70 is smaller than the outer diameter of the large diameter portion 22, for example. The left surface of the washer 70 is in contact with the bottom surface of the recess 88c, for example. The right side surface of the washer 70 is in contact with, for example, the left side end surface of the fixed portion 34.

The flange portion 35 is fixed to the fixed portion 34. The flange 35 is formed by bending a plate-like member, for example. The flange 35 has a base 35a, a connecting portion 35b, and an outer edge 35 c. That is, the first movable member 31 has an outer edge portion 35 c.

The base portion 35a is a portion fixed to the fixed portion 34. The base portion 35a has a fixing hole 35g penetrating the base portion 35a in the left-right direction. The second portion 34b is fitted into the fixing hole 35 g. The right end of the second portion 34b protrudes to the right side beyond the fixing hole 35 g. The outer diameter of the portion of the second portion 34b that protrudes to the right side of the fixing hole 35g is smaller toward the right side, for example.

The left surface of the base 35a contacts the step surface 34 e. The base portion 35a is fixed to the fixed portion 34 by welding, for example. The base portion 35a may be fixed to the fixed portion 34 by pressing the second portion 34b into the fixing hole 35 g. As shown in fig. 5, the base portion 35a has an insertion hole 35f recessed from the right side surface of the base portion 35a toward the left side. The insertion hole 35f is, for example, a circular hole that penetrates the base portion 35a in the left-right direction.

The coupling portion 35b is a portion connecting the base portion 35a and the outer edge portion 35 c. The coupling portion 35b projects obliquely rightward in the radial direction from a part of the base portion 35a in the circumferential direction. The coupling portion 35b protrudes from, for example, a portion of the base portion 35a at a circumferential position different from the circumferential position of the insertion hole 35 f.

The outer edge portion 35c projects radially outward from the radially outer end of the coupling portion 35 b. The outer edge portion 35c is located outward of the fixed portion 34 in the radial direction around the center axis J4. The outer edge portion 35c extends, for example, in the circumferential direction. The circumferential dimension of the outer edge portion 35c increases, for example, from the radially inner side toward the radially outer side. As shown in fig. 2, in the present embodiment, the outer edge portion 35c is positioned on the right side of the fixed portion 34. That is, in the present embodiment, the position of the fixed portion 34 in the left-right direction and the position of the outer edge portion 35c in the left-right direction are different from each other. In the present embodiment, the position of the fixed portion 34 in the left-right direction is a position that is farther from the second movable member 32 in the left-right direction than the position of the outer edge portion 35c in the left-right direction.

As shown in fig. 5, the first movable member 31 has a groove portion 35 h. In the present embodiment, the groove portion 35h is provided in the outer edge portion 35 c. The groove 35h is recessed radially inward from the radially outer peripheral edge of the outer edge 35c, for example. In the present embodiment, a plurality of groove portions 35h are provided. The groove portion 35h includes a first groove portion 35d and a second groove portion 35 e. The first groove portion 35d and the second groove portion 35e are circumferentially separated from each other. For example, the second groove portion 35e is disposed apart from the first groove portion 35d toward one side in the circumferential direction. The first groove portion 35d is provided at the other circumferential end of the outer edge portion 35c, for example. The second groove portion 35e is provided at, for example, one end portion of the outer edge portion 35c in the circumferential direction.

As shown in fig. 2, the second movable member 32 is coupled to the first movable member 31 via the first elastic member 33. The second movable member 32 is relatively movable with respect to the first movable member 31. In the present embodiment, the second movable member 32 is relatively rotatable about the central axis J4 with respect to the first movable member 31. The second movable member 32 is disposed apart to the right of the first movable member 31, for example. That is, in the present embodiment, the first movable member 31 and the second movable member 32 are disposed with a space therebetween in the left-right direction. The second movable member 32 is, for example, a single member. The second movable member 32 has a cylindrical portion 36 and a cam flange portion 37.

The cylindrical portion 36 is, for example, cylindrical with the center axis J4 as the center. The cylindrical portion 36 is open on both sides in the left-right direction. The cylindrical portion 36 has a through hole 36e through which the driven shaft 20 penetrates in the left-right direction. That is, the second movable member 32 has a through hole 36e through which the driven shaft 20 penetrates in the left-right direction. The right end of the middle diameter portion 23 and the left end of the small diameter portion 24 are located inside the through hole 36 e. The second movable member 32 is relatively rotatable about the central axis J4 with respect to the driven shaft 20. A step having a step surface 36d is provided on the inner peripheral surface of the through hole 36 e. The step surface 36d is a surface facing to the left. For example, a step surface of a step provided between the middle diameter portion 23 and the small diameter portion 24 in the left-right direction is in contact with the step surface 36 d.

The cylindrical portion 36 has a base portion 36a, a first protruding portion 36b connected to the right side of the base portion 36a, and a second protruding portion 36c connected to the left side of the base portion 36 a. The first projecting portion 36b projects rightward from the base portion 36 a. The outer diameter of the first projection 36b is smaller than the outer diameter of the base 36 a. The right end surface of the first protruding portion 36b is, for example, the right end surface of the second movable member 32, and contacts the left surface of the partition wall 87 a. The second protruding portion 36c protrudes from the base portion 36a to the left side. The outer diameter of the second projection 36c is smaller than the outer diameter of the base 36 a. For example, the outer diameter of the second protruding portion 36c becomes smaller toward the left side.

The cam flange portion 37 expands radially outward from the base portion 36 a. The cam flange portion 37 is expanded downward from the base portion 36a, for example. As shown in fig. 4, the cam flange portion 37 has a substantially fan shape when viewed from the left-right direction. A part of the radially outer surface of the cam flange portion 37 is a cam surface 37 a. That is, the second movable member 32 has a cam surface 37 a. The cam surface 37a extends in the circumferential direction. The cam surface 37a faces, for example, the lower side. As shown in fig. 3 and 6, the cam surface 37a is a surface that contacts the stopper member 40. That is, in the present embodiment, the second movable member 32 is in contact with the stopper member 40 via the cam surface 37 a. The cam surface 37a is located radially outward of the radially outer edge of the outer edge portion 35c, for example.

As shown in fig. 6, the cam surface 37a has a first cam portion 37b and a second cam portion 37 c. The first cam portion 37b and the second cam portion 37c extend in the circumferential direction. The first cam portion 37b and the second cam portion 37c are, for example, circular arcs centered on the central axis J4. The first cam portion 37b and the second cam portion 37c are connected in the circumferential direction. The second cam portion 37c is connected to one side in the circumferential direction of the first cam portion 37b, for example. The second cam portion 37c is located radially outward of the first cam portion 37 b.

In the present embodiment, the cam surface 37a has a portion at the same circumferential position as the first groove portion 35 d. That is, in the present embodiment, the circumferential position around the central axis J4 of at least a part of the groove portion 35h is included in the circumferential position around the central axis J4 of the cam surface 37 a. In the present embodiment, the circumferential position of the cam surface 37a is a circumferential range indicated by θ c in fig. 6. The circumferential position of the cam surface 37a includes, for example, the circumferential position of the portion of the outer edge portion 35c on the other circumferential side.

As shown in fig. 4, the cam flange portion 37 has an insertion hole 37d recessed from the left side surface to the right side of the cam flange portion 37. The insertion hole 37d is, for example, a circular hole that penetrates the cam flange 37 in the left-right direction. The insertion hole 37d is provided in a portion of the cam flange 37 where the cam surface 37a is not provided on the radially outer surface, for example. The insertion hole 37d is located on the circumferential side of the cam surface 37a, for example.

The first elastic member 33 couples the first movable member 31 and the second movable member 32. As shown in fig. 2 and 4, in the present embodiment, the first elastic member 33 is a coil spring extending in the left-right direction and surrounding the driven shaft 20. The first elastic member 33 is, for example, a torsion coil spring. That is, in the present embodiment, the first elastic member 33 is elastically deformable in the circumferential direction. The first elastic member 33 is elastically deformed in the circumferential direction by the relative rotation of the first movable member 31 and the second movable member 32 in the circumferential direction.

In the present embodiment, the intermediate diameter portion 23 penetrates the inside of the first elastic member 33 in the left-right direction. The first elastic member 33 is located between the first movable member 31 and the second movable member 32 in the left-right direction. As shown in fig. 4, the first elastic member 33 includes an elastic member main body 33a and inserted portions 33b, 33 c.

The elastic member main body 33a is a portion in which the wire material constituting the first elastic member 33 is spirally wound around the central axis J4. As shown in fig. 2, a portion of the second portion 34b of the fixed portion 34 that protrudes rightward from the fixing hole 35g is inserted inside the left end portion of the elastic member body 33 a. This can suppress the first elastic member 33 from being displaced in the radial direction with respect to the first movable member 31. In the present embodiment, the outer diameter of the portion of the second portion 34b that protrudes to the right side of the fixing hole 35g is smaller toward the right side, and therefore, the second portion 34b is easily inserted inside the left end portion of the elastic member main body 33 a.

A second projecting portion 36c of the tube portion 36 is inserted inside the right end portion of the elastic member main body 33 a. This can suppress the first elastic member 33 from being displaced in the radial direction with respect to the second movable member 32. In the present embodiment, since the outer diameter of the second protruding portion 36c is smaller than the outer diameter of the base portion 36a, the outer diameter of the second protruding portion 36c can be made relatively small, and the second protruding portion 36c can be easily inserted inside the right-side end portion of the elastic member main body 33 a. In addition, in the present embodiment, since the outer diameter of the second protruding portion 36c becomes smaller toward the left side, it is easier to insert the second protruding portion 36c inside the right end portion of the elastic member main body 33 a. A part of the left side portion of the elastic member main body 33a is located radially inward of the outer edge portion 35 c. That is, a part of the first elastic member 33 overlaps the outer edge portion 35c when viewed in a radial direction about the central axis J4.

As shown in fig. 4, the inserted portion 33b extends leftward from the left end of the wire constituting the elastic member main body 33 a. The inserted portion 33b is inserted into the insertion hole 35f of the first movable member 31. Thereby, the first elastic member 33 is attached to the first movable member 31. The inserted portion 33c extends rightward from the right end of the wire material constituting the elastic member body 33 a. The inserted portion 33c is inserted into the insertion hole 37d of the second movable member 32. Thereby, the first elastic member 33 is attached to the second movable member 32.

As shown in fig. 3, the stopper member 40 is located, for example, below the movable portion 30. In the present embodiment, the stopper member 40 is rotatably supported by the support shaft 44. The support shaft 44 is, for example, a columnar shape extending in the left-right direction around a rotation axis J5 parallel to the power axis J1. The rotation axis J5 is located more frontward and downward than the center axis J4, for example. The rotation axis J5 is located, for example, on the front side and the upper side of the intermediate axis J2. Although not shown, the right end of the support shaft 44 is fitted into a hole provided in the partition wall 87a and supported. The left end of the support shaft 44 is fitted into and supported by a hole provided in the left side wall 88 a.

A torsion coil spring 45 is attached to the support shaft 44. One end of the torsion coil spring 45 is fixed to the stopper member 40. Although not shown, the other end of the torsion coil spring 45 is fixed to the partition wall 87 a. The torsion coil spring 45 applies an elastic force toward the circumferential one-side direction (+ θ direction) to the stopper member 40.

The stopper member 40 has an arm portion 41, a claw portion 42, and a contact portion 43. The arm portion 41 extends from the support shaft 44 toward the rear side (-X side). As shown in fig. 6, a hole 41a penetrating the arm 41 in the left-right direction is provided at the front end of the arm 41. The support shaft 44 penetrates the hole 41a in the left-right direction. The rear end of the arm 41 is located below the cam surface 37 a.

The claw portion 42 protrudes downward from the end portion on the rear side (-X side) of the arm portion 41. The contact portion 43 is provided on the upper side of the rear end of the arm portion 41. In the present embodiment, the contact portion 43 is a roller attached to the rear end of the arm portion 41. The contact portion 43 is attached to the arm portion 41 so as to be rotatable about a rotation axis extending in the left-right direction. The contact portion 43 contacts the cam surface 37a from the lower side.

The stopper member 40 moves in accordance with the movement of the movable portion 30. In the present embodiment, the stopper member 40 swings about the rotation axis J5 as the second movable member 32 rotates about the center axis J4. Thereby, the rear end of the stopper member 40 moves in the vertical direction as the second movable member 32 rotates about the center axis J4. In the present embodiment, since the stopper member 40 receives an elastic force toward one side in the circumferential direction by the torsion coil spring 45, the contact portion 43 provided at the rear end portion of the stopper member 40 receives a force toward the upper side from the torsion coil spring 45 and is pressed from the lower side to the cam surface 37 a.

In the present embodiment, the parking gear 50 is located on the lower side of the stopper member 40. In more detail, the parking gear 50 is located on a lower side of the pawl portion 42. In the present embodiment, the parking gear 50 is not located on the extension line of the driven shaft 20. That is, in the present embodiment, the driven shaft 20 is located outside the region where the parking gear 50 is provided when viewed from the left-right direction.

As shown in fig. 1, the parking gear 50 is fixed to, for example, the left end of the intermediate shaft 83 d. Therefore, in the present embodiment, the parking gear 50 is fixed to the second gear 83b via the intermediate shaft 83 d. The parking mechanism 10 is attached to the transmission mechanism portion 80b via the parking gear 50. The parking gear 50 is rotatable about the intermediate axis J2. The parking gear 50 may be fixed to the second gear 83b via the third gear 83c, or may be directly fixed to the second gear 83 b.

As shown in fig. 3 and 6, the parking gear 50 has a plurality of teeth 51 spaced apart along the circumference of the intermediate axis J2. The pawl 42 can be inserted between the teeth 51. Thereby, the pawl portion 42 can mesh with the parking gear 50.

As shown in fig. 4, the second elastic member 60 has a plate spring portion 61 and a roller 62. The plate spring portion 61 is a plate shape with a plate surface facing in the vertical direction. The plate spring portion 61 extends in the front-rear direction. The front end of the plate spring portion 61 is fixed to the housing 85 by, for example, a screw 63. The portion of the plate spring portion 61 on the rear side is located on the lower side of the first movable member 31. The rear portion of the plate spring portion 61 is elastically displaceable in the vertical direction with the front end of the plate spring portion 61 fixed by the screw 63 as a fulcrum.

The plate spring portion 61 has a base portion 61a and a pair of arm portions 61b, 61 c. The base portion 61a is, for example, a front side portion of the plate spring portion 61. The base portion 61a is fixed to the housing 85 by, for example, screws 63. The pair of arm portions 61b, 61c extend rearward from the rear end of the base portion 61 a. The pair of arm portions 61b, 61c are arranged at intervals in the left-right direction. Arm 61c is located on the right side of arm 61 b. The left-right direction position between the pair of arm portions 61b, 61c in the left-right direction is, for example, the same as the left-right direction position of the outer edge portion 35 c. Between the pair of arm portions 61b, 61c in the left-right direction, for example, the outer edge portion 35c penetrates in the up-down direction.

The roller 62 is rotatable about a rotation axis extending in the left-right direction. The roller 62 is attached to the rear end of the plate spring portion 61. The roller 62 extends in the left-right direction. The roller 62 connects the rear-side end portions of the pair of arm portions 61b, 61c to each other. The left end of roller 62 is rotatably supported by the rear end of arm 61 b. The right end of roller 62 is rotatably supported by the rear end of arm 61 c. The roller 62 is located below the outer edge portion 35 c. The roller 62 contacts the radially outer surface of the outer edge portion 35 c.

The roller 62 can be embedded in the groove portion 35h, and can be hooked with respect to the groove portion 35h in the circumferential direction around the center axis J4. Thereby, the second elastic member 60 is hooked to the groove portion 35h in the circumferential direction around the center axis J4. In fig. 4, for example, a state is shown in which the roller 62 is embedded in the first groove portion 35d and hooked in the circumferential direction.

Fig. 3 shows a state in which the parking mechanism 10 is in an unlocked state in which the rotation of the axle 86 is permitted. In the unlocked state, the pawl portion 42 of the stopper member 40 is in a state of being distanced upward from the parking gear 50, and the pawl portion 42 is not located between the tooth portions 51. That is, in the unlocked state, the stopper member 40 is located at the non-parking position where the pawl portion 42 is away from the parking gear. In this state, the parking gear 50 is rotatable about the intermediate axis J2, and the gears of the reduction gear 83 are also rotatable. Therefore, the rotation from the power unit 80a is transmitted to the axle 86 via the reduction gear unit 83 and the differential gear unit 84, and the axle 86 is rotatable. In the unlocked state, the roller 62 is hooked in the circumferential direction to the first groove portion 35 d. That is, when the rotation angle of the driven shaft 20 is a rotation angle at which the stopper member 40 is in the non-parking position, the second elastic member is hooked to the first groove portion 35 d. In the unlocked state, the contact portion 43 of the stopper member 40 contacts the first cam portion 37 b.

In the unlocked state, when the driven shaft 20 is rotated in the other circumferential direction (- θ direction) by the electric actuator 90, the movable portion 30 is also rotated in the other circumferential direction together with the driven shaft 20. When the second movable member 32 is rotated in the other circumferential direction from the unlocked state, the portion of the cam surface 37a that contacts the contact portion 43 changes from the first cam portion 37b to the second cam portion 37c as shown in fig. 6. Since the second cam portion 37c is located radially outward of the first cam portion 37b, the contact portion 43 is pressed downward by the second cam portion 37c, and the rear end portion of the stopper member 40 is moved downward. Thereby, the pawl portions 42 enter between the tooth portions 51 of the parking gear 50 and mesh with the parking gear 50. That is, the position of the stopper member 40 is a parking position where the pawl portion 42 engages with the parking gear 50.

If the pawl 42 engages the parking gear 50, the parking gear 50 is prevented from rotating about the intermediate axis J2. Therefore, the rotation of the intermediate shaft 83d, the second gear 83b, and the third gear 83c to which the parking gear 50 is fixed is prevented. Thereby, the parking mechanism 10 is in a locked state in which the rotation of the axle 86 is prevented. In the locked state, the roller 62 is hooked in the circumferential direction to the second groove portion 35 e. That is, when the rotation angle of the driven shaft 20 is a rotation angle at which the stopper member 40 is in the parking position, the second elastic member 60 is hooked to the second groove portion 35 e.

In the locked state, when the driven shaft 20 is rotated in the one circumferential direction (+ θ direction) by the electric actuator 90, the movable portion 30 is also rotated in the one circumferential direction together with the driven shaft 20. When the second movable member 32 rotates in one circumferential direction from the locked state, the portion of the cam surface 37a that contacts the contact portion 43 changes from the second cam portion 37c to the first cam portion 37 b. Thereby, the rear end portion of the stopper member 40 is moved upward by the elastic force of the coil spring 45, and the claw portions 42 are separated upward from each other from the tooth portions 51 of the parking gear 50. That is, the position of the stopper member 40 is the non-parking position where the pawl portion 42 is away from the parking gear 50. Thereby, the parking mechanism 10 is again in the unlocked state.

As described above, the driven shaft 20 is rotated by the electric actuator 90, and the position of the stopper member 40 is switched between the parking position and the non-parking position in accordance with the movement of the movable portion 30. Thereby, the parking mechanism 10 is switched between the locked state and the unlocked state.

According to the present embodiment, the portion of the driven shaft 20 located on the left side with respect to the movable portion 30 is connected to the electric actuator 90 as a drive source for rotating the driven shaft 20. The driven shaft 20 has a first supported portion 24a located on the right side of the movable portion 30. Therefore, the driven shaft 20 supports both sides of the portion located on both sides in the left-right direction with respect to the movable portion 30 by the electric actuator 90 and the first hole 87b in the present embodiment, which is the portion supporting the first supported portion 24 a. This enables the driven shaft 20 to be stably supported, as compared with the case where the driven shaft 20 is supported on one side. Therefore, even if a load is applied to the driven shaft 20, the occurrence of a failure such as deformation of the driven shaft 20 can be suppressed. Therefore, occurrence of a failure in the operation of the parking mechanism 10 can be suppressed. Therefore, the reliability of the parking mechanism 10 can be improved.

Further, for example, when the parking mechanism 10 is switched from the unlocked state to the locked state, when the stopper member 40 approaches the parking gear 50, the pawl portion 42 may contact the tip of the tooth portion 51 depending on the position of the tooth portion 51 of the parking gear 50. In this case, the stopper member 40 sometimes cannot be moved to a position where the pawl portion 42 and the tooth portion 51 are engaged with each other. In this case, the second movable member 32 that presses the stopper member 40 via the cam surface 37a may not be able to rotate to the predetermined position.

In contrast, according to the present embodiment, the movable portion 30 includes the first elastic member 33 that couples the first movable member 31 and the second movable member 32. Therefore, even in the case where the second movable member 32 cannot rotate to the predetermined position, the first movable member 31 can be rotated to the predetermined position together with the driven shaft 20 by the elastic deformation of the first elastic member 33, and the state where the second movable member 32 is not at the predetermined position is allowed. Thus, even when the pawl portion 42 contacts the tip end of the tooth portion 51, the rotation of the first movable member 31 and the driven shaft 20 can be suppressed. Therefore, the load applied to the electric actuator 90 that rotates the driven shaft 20 can be suppressed. Further, it is possible to suppress transmission of an impact of the pawl portion 42 contacting the leading end of the tooth portion 51 to the first movable member 31 and the driven shaft 20. Therefore, damage to the first movable member 31 and the driven shaft 20 can be suppressed.

When the claw portion 42 contacts the tip of the tooth portion 51, the first elastic member 33 is elastically deformed, and therefore, an elastic force in a direction moving from the first elastic member 33 to a predetermined position is applied to the second movable member 32. Therefore, when the parking gear 50 rotates to shift the positions of the tooth portions 51, the second movable member 32 moves to a predetermined position, and the claw portion 42 of the stopper member 40 is pushed into between the tooth portions 51. Thereby, the pawl portion 42 and the tooth portion 51 are engaged with each other, and the stopper member 40 is moved to the parking position.

In addition, according to the present embodiment, the first movable member 31 has the groove portion 35h to which the second elastic member 60 is hooked. Therefore, by hooking the second elastic member 60 to the groove portion 35h, the movement of the second elastic member 60 can be suppressed, and the driven shaft 20 can be suppressed from rotating about the central axis J4. Thus, for example, even when the power supply to the electric actuator 90 is turned off, the position of the driven shaft 20 can be maintained, and the state of the parking mechanism 10 can be maintained. On the other hand, when the driven shaft 20 is rotated by the electric actuator 90, the second elastic member 60 is elastically displaced, and thereby the driven shaft 20 and the movable portion 30 can be rotated while the second elastic member 60 is displaced from the groove portion 35 h. Therefore, the state of the parking mechanism 10 can be switched.

Further, as described above, since the first movable member 31 and the second movable member 32 are coupled by the first elastic member 33, even when an impact is applied to the second movable member 32 via the stopper member 40 or the like, the impact can be absorbed by the first elastic member 33. This can suppress the transmission of the impact to the first movable member 31. Therefore, by providing the groove portion 35h to the first movable member 31 instead of the second movable member 32, even when an impact is applied to the second movable member 32, it is possible to suppress the first movable member 31 from moving and the second elastic member 60 from deviating from the groove portion 35 h. Therefore, the position of the driven shaft 20 can be more desirably maintained, and the state of the parking mechanism 10 can be more desirably maintained.

In addition, according to the present embodiment, the groove portion 35h includes: a first groove portion 35d to which the second elastic member 60 is hooked when the rotation angle of the driven shaft 20 is a rotation angle at which the stopper member 40 is in the non-parking position; and a second groove portion 35e to which the second elastic member 60 is hooked when the rotation angle of the driven shaft 20 is a rotation angle at which the stopper member 40 is positioned at the parking position. Therefore, the parking mechanism 10 can be maintained in the unlocked state by the second elastic member 60 being hooked to the first groove portion 35 d. Further, the parking mechanism 10 can be maintained in the locked state by the second elastic member 60 being hooked to the second groove portion 35 e.

In the present embodiment, when the outer edge portion 35c rotates, the plate spring portion 61 is elastically displaced downward by the radially outer side surface of the outer edge portion 35c, and the roller 62 is displaced from one of the first groove portion 35d and the second groove portion 35 e. When the other of the first groove portion 35d and the second groove portion 35e moves to a position opposing the roller 62, the roller 62 fits into the other of the first groove portion 35d and the second groove portion 35 e.

In addition, according to the present embodiment, the circumferential position around the central axis J4 of at least a part of the groove portion 35h is included in the circumferential position around the central axis J4 of the cam surface 37 a. Therefore, the outer edge portion 35c provided with the groove portion 35h and the cam flange portion 37 having the cam surface 37a can be easily arranged in the same region in the housing 85. Thus, the first movable member 31 and the second movable member 32 can be disposed in the housing 85 with space efficiency, as compared with a case where the regions where the outer edge portion 35c and the cam flange portion 37 are disposed are secured in the housing 85.

In addition, according to the present embodiment, the position of the fixed portion 34 in the left-right direction and the position of the outer edge portion 35c in the left-right direction are different from each other. Therefore, when the fixed portion 34 is fixed to the driven shaft 20, the outer edge portion 35c is less likely to become an obstacle. This makes it possible to easily fix the fixed portion 34 to the driven shaft 20. In the present embodiment, the operation of inserting the pin 38 into the pin stopper holes 23a and 34c can be easily performed.

Further, according to the present embodiment, a part of the first elastic member 33 overlaps the outer edge portion 35c when viewed in a radial direction around the center axis J4. Therefore, a part of the first elastic member 33 can be arranged radially inward of the outer edge portion 35c, and the dimension of the first elastic member 33 in the left-right direction can be easily increased. This makes it easy to optimize the elastic modulus of the first elastic member 33.

In addition, according to the present embodiment, the driven shaft 20 is located outside the region where the parking gear 50 is provided when viewed from the left-right direction. That is, the parking gear 50 is not located on the extension line of the driven shaft 20. Therefore, a space for providing a portion for supporting the first supported portion 24a on the right side of the driven shaft 20 is easily secured in the housing 85. In the present embodiment, the first hole 87b is easily provided on the right side of the driven shaft 20.

In addition, according to the present embodiment, the driven shaft 20 has the second supported portion 22b, and the second supported portion 22b is located between the portion of the driven shaft 20 connected to the electric actuator 90 as the driving source and the movable portion 30 in the left-right direction. Therefore, the driven shaft 20 can be supported more stably. Therefore, even if a load is applied to the driven shaft 20, the occurrence of a failure such as deformation of the driven shaft 20 can be further suppressed. Therefore, the reliability of the parking mechanism 10 can be further improved.

In the present embodiment, the oil O raised by the ring gear 84a is supplied between the first supported portion 24a and the first hole 87b, and between the second supported portion 22b and the second hole 88 d. Therefore, the oil O functions as a lubricating oil, and friction between the outer peripheral surface of each supported portion and the inner peripheral surface of each hole can be reduced. Thus, the supported portions can be supported by the holes in a rotatable manner.

In addition, according to the present embodiment, the housing 85 has the first hole 87b into which the first supported portion 24a is inserted and the second hole 88d into which the second supported portion 22b is inserted. Therefore, the driven shaft 20 can be rotatably supported by the first hole 87b and the second hole 88 d. This can reduce the number of components of the drive device 100, compared to a case where a bearing for supporting the driven shaft 20 is separately provided for the housing 85.

In addition, according to the present embodiment, the housing 85 includes the first housing member 87 having the first hole portion 87b, and the second housing member 88 having the second hole portion 88 d. Therefore, for example, the following assembly method can be adopted: one supported portion is supported at one hole portion before the first case member 87 and the second case member 88 are fixed, and the other supported portion is supported at the other hole portion when the first case member 87 and the second case member 88 are fixed. This makes it easier to assemble the drive device 100, for example, as compared with a case where the first hole 87b and the second hole 88d are provided in the same member.

In addition, according to the present embodiment, the parking gear 50 is fixed to the second gear 83 b. Therefore, the parking mechanism 10 can be disposed apart from the extension line of the power shaft 81a, compared to the case where the parking gear 50 is fixed to the first gear 83a, for example. This makes it possible to easily dispose the parking mechanism 10 in the housing 85.

The present invention is not limited to the above-described embodiments, and other configurations and other methods can be adopted within the scope of the technical idea of the present invention. The predetermined direction in which the center axis of the driven shaft extends is not particularly limited. The predetermined direction in which the center axis of the driven shaft extends may be a direction orthogonal to the rotation axis of the parking gear. For example, in the above embodiment, the central axis J4 and the driven shaft 20 may extend in the vertical direction.

The portion supporting the first supported portion and the portion supporting the second supported portion may have any configuration as long as the supported portions can rotatably support each of the supported portions. The portion supporting the first supported portion and the portion supporting the second supported portion may be cylindrical sliding bearing members or rolling bearing members such as ball bearings. In this case, each bearing member is held to the housing, for example. The portion supporting the first supported portion and the portion supporting the second supported portion may be provided in the same single member.

For example, in the case where the driven shaft 20 of the above embodiment extends in the vertical direction, the first hole 87b that supports the first supported portion 24a and the second hole 88d that supports the second supported portion 22b may be provided in the second housing member 88. In this case, the coupled portion 21 may protrude upward from the second housing member 88. In this case, the wall portion for providing the first hole 87b may protrude rightward from the left side wall portion 88 a. The second supported portion may not be provided.

The movable portion may have any structure as long as it moves along with the rotation of the driven shaft. The movable portion may be a single member. The movable portion may be configured to linearly move in one direction as a whole without rotating. The movable portion may not be a cam surface, and may have any structure as long as the portion in contact with the stopper moves the stopper. In the case where the movable portion has the first movable member and the second movable member, the first movable member and the second movable member may be disposed at any relative positions. The moving direction of the first movable member and the moving direction of the second movable member may also be different from each other. In the above embodiment, the second movable member 32 may be disposed on the left side of the first movable member 31, that is, on the side closer to the connected portion 21.

The stopper member may be moved in any manner as long as it moves along with the movement of the movable portion. The stopper member may be configured to move linearly in one direction as a whole without swinging. The groove portion to which the second elastic member is hooked may be provided in the second movable member. Only one groove may be provided, or three or more grooves may be provided. The groove portion may not be provided. The parking gear may be attached to any part of the transmission mechanism.

The power unit may not be an electric motor. The power unit may be an engine, for example. The structure of the transmission mechanism is not particularly limited. As described above, the respective structures and the respective methods described in the present specification can be appropriately combined within a range not inconsistent with each other.

Claims (13)

1. A parking mechanism, comprising:

a driven shaft that is rotatable about a central axis line extending in a predetermined direction;

a movable portion that moves in accordance with rotation of the driven shaft;

a stopper member having a claw portion and moving along with the movement of the movable portion; and

a parking gear engageable with the pawl portion,

the position of the stopper member is switched to a parking position where the pawl portion is engaged with the parking gear and a non-parking position where the pawl portion is separated from the parking gear in accordance with the movement of the movable portion,

a portion of the driven shaft located on one side of the predetermined direction with respect to the movable portion is connected to a drive source that rotates the driven shaft,

the driven shaft has a first supported portion supported rotatably about the central axis,

the first supported portion is located on the other side in the predetermined direction with respect to the movable portion.

2. The parking mechanism of claim 1,

the movable part has:

a first movable member fixed to the driven shaft;

a second movable member that is in contact with the stopper member and is relatively movable with respect to the first movable member; and

a first elastic member that couples the first movable member and the second movable member.

3. The parking mechanism of claim 2,

and a second elastic member is further included and,

the first movable member has a groove portion to which the second elastic member is hooked.

4. The parking mechanism of claim 3,

the groove portion includes:

a first groove portion to which the second elastic member is hooked when a rotation angle of the driven shaft is a rotation angle at which the stopper member is placed in the non-parking position; and

a second groove portion to which the second elastic member is hooked in a case where a rotation angle of the driven shaft is a rotation angle at which the stopper member is brought into the parking position.

5. Parking mechanism according to claim 3 or 4,

the second movable member has:

a through hole through which the driven shaft passes in the predetermined direction; and

a cam surface in contact with the stop member,

and the second movable member is relatively rotatable around the central axis with respect to the first movable member,

a circumferential position around the central axis of at least a part of the groove portion is included in a circumferential position around the central axis of the cam surface.

6. The parking mechanism as recited in any one of claims 3 to 5,

the first movable member has:

a fixed portion fixed to the driven shaft; and

an outer edge portion located outward of the fixed portion in a radial direction centered on the central axis and provided with the groove portion,

the position of the fixed portion in the predetermined direction and the position of the outer edge portion in the predetermined direction are different from each other.

7. The parking mechanism of claim 6,

the first movable member and the second movable member are disposed with a space therebetween in the predetermined direction,

the first elastic member is a coil spring extending in the predetermined direction and surrounding the driven shaft, and is located between the first movable member and the second movable member in the predetermined direction,

the position in the predetermined direction of the fixed portion is a position apart from the second movable member in the predetermined direction with respect to the position in the predetermined direction of the outer edge portion,

a portion of the first elastic member overlaps the outer edge portion as viewed in a radial direction centered on the central axis.

8. The parking mechanism as recited in any one of claims 1 to 7,

the driven shaft is located outside an area where the parking gear is provided, as viewed in the prescribed direction.

9. The parking mechanism as recited in any one of claims 1 to 8,

the driven shaft has a second supported portion supported rotatably about the central axis,

the second supported portion is located between a portion of the driven shaft connected to the drive source and the predetermined direction of the movable portion.

10. A drive device mounted on a vehicle, comprising:

a power unit that drives the drive device;

a transmission mechanism connected to the power unit;

the parking mechanism according to claim 9 attached to the transmission mechanism portion; and

a housing that accommodates the power unit, the transmission mechanism unit, and the parking mechanism therein,

the housing has:

a first hole portion into which the first supported portion is inserted; and

a second hole portion into which the second supported portion is inserted.

11. The drive of claim 10,

the housing has:

a first housing member having the first hole portion; and

a second housing member having the second hole portion and fixed to the first housing member.

12. A drive device mounted on a vehicle, comprising:

a power unit that drives the drive device;

a transmission mechanism connected to the power unit; and

the parking mechanism according to any one of claims 1 to 9 attached to the transmission mechanism portion.

13. The drive device according to any one of claims 10 to 12,

the transmission mechanism section includes:

a first gear fixed to the power part; and

a second gear meshed with the first gear,

the parking gear is fixed to the second gear.

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