Parking device

Abstract

To provide a parking device that can regulate rotation in an unlock direction of a parking pole before a first case and a second case are connected to each other and can position a parking support on a rotation locus in the unlock direction of the parking pole by connecting the first case and the second case to each other.SOLUTION: A parking device includes a pressing member 62 provided inside a second case 50, separating from a positioning member 41 that is positioned in a regulation position before the second case is connected to a first case 15, and pressing the positioning member that is positioned in the regulation position when the second case is connected to the first case to an allowable position.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] Patent Document 1 below discloses a parking device for a vehicle. This parking device includes a first case and a second case that are detachable from each other. A parking gear, a parking pole, a first biasing member, a rod, and a parking support are provided in the internal space formed between the first case and the second case.

[0003] The parking gear is rotatable around a central axis, and restricting its rotation locks the vehicle's drive wheels. The parking pole restricts rotation of the parking gear by engaging with the parking gear when positioned in the locked position. The first biasing member biases the parking pole to rotate in the unlocking direction, which is a direction away from the parking gear. The rod moves in a predetermined direction while engaged with the parking pole, causing the parking pole to rotate toward the locked position and in the unlocking direction. The parking support receives the rod so that it can move in the predetermined direction and is located on the rotation trajectory of the parking pole in the unlocking direction. Therefore, when the parking pole comes into contact with the parking support, further rotation of the parking pole in the unlocking direction is restricted. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-105423 Summary of the Invention [Problem to be solved by the invention]

[0005] It is possible to provide the parking gear, parking pole, first biasing member, and rod on the first case, and the parking support on the second case. In this case, before the first and second cases are connected, it is necessary to restrict rotation of the parking pole in the unlocking direction at a predetermined position.

[0006] In consideration of the above, the present invention aims to provide a parking device that can restrict the rotation of the parking pole in the unlocking direction at a predetermined position before the first case and the second case are connected, and that can position the parking support on the rotation trajectory of the parking pole in the unlocking direction by connecting the first case and the second case. [Means for solving the problem]

[0007] The parking device of claim 1 includes a first case mounted on a vehicle, a parking gear provided inside the first case, rotatable about a central axis, and having its rotation restricted to lock drive wheels of the vehicle, a parking pole rotatably provided inside the first case, and engaging with the parking gear when the parking gear is located at a locked position to restrict rotation of the parking gear, a first biasing member provided inside the first case and biasing the parking pole to rotate in an unlocking direction away from the parking gear, a rod provided inside the first case and movable in a predetermined direction, a cam provided on the rod and contacting the parking pole when the rod moves to rotate the parking pole toward the locked position and in the unlocking direction, and a storage hole formed inside the first case and movably provided in the storage hole and configured to store the the parking pole is provided with a positioning member that is movable between an allowable position where it is away from the outer periphery of the parking pole and allows rotation of the parking pole in the unlocking direction, and a restricting position where it protrudes from the storage hole by a greater amount than the allowable position and comes into contact with the outer periphery and restricts rotation of the parking pole in the unlocking direction; a second case that is detachable from the first case; a parking support that is provided inside the second case and is contactable with the cam and is positioned on the rotation trajectory of the parking pole in the unlocking direction when the second case is connected to the first case; and a pressing member that is provided inside the second case and is away from the positioning member that is in the restricting position before the second case is connected to the first case, and that presses the positioning member that is in the restricting position to the allowable position when the second case is connected to the first case.

[0008] In the parking device of claim 1, before the second case is connected to the first case, the pressing member moves away from the positioning member in the restricting position. Before the first case and the second case are connected, the positioning member in the restricting position comes into contact with the outer periphery of the parking pole, thereby restricting rotation of the parking pole in the unlocking direction by the positioning member. Furthermore, when the second case is connected to the first case, the pressing member pushes the positioning member in the restricting position to the allowed position. Therefore, by connecting the first case and the second case, it is possible to position the parking support on the rotation trajectory of the parking pole in the unlocking direction.

[0009] The parking device of claim 2 is the same as claim 1, wherein a second biasing member is provided in the storage hole to bias the positioning member toward the restricted position.

[0010] In the parking device of claim 2, when the second case connected to the first case is separated from the first case, the pressing member separates from the positioning member, and the second biasing member moves the positioning member to the restricted position. Therefore, when the second case is separated from the first case, the positioning member can automatically restrict rotation of the parking pole in the unlocking direction.

[0011] The parking device described in claim 3 is the same as claim 1 or claim 2, in which the positioning member is a cylindrical member, and the end of the positioning member facing the pressing member is formed with a tapered surface that gradually reduces in diameter as it approaches the pressing member and can come into contact with the edge of the outer periphery of the parking pole facing the positioning member when the positioning member moves from the allowable position to the restricting position.

[0012] In the parking device of claim 3, the cylindrical positioning member has a tapered surface formed on its end facing the pressing member, the tapered surface gradually narrowing toward the pressing member and capable of contacting the edge of the outer periphery of the parking pole facing the positioning member when the positioning member moves from the permitted position to the restricted position. Therefore, compared to when the tapered surface is not formed, when the first case and the second case are connected, it is possible to smoothly switch the member restricting rotation of the parking gear from the positioning member to the parking support. Furthermore, compared to when the tapered surface is not formed, when the first case and the second case are separated, it is easier for the positioning member to automatically restrict rotation of the parking pole in the unlocking direction. [Effects of the Invention]

[0013] As described above, the parking device of the present invention has the excellent effect of being able to restrict the rotation of the parking pole in the unlocking direction at a predetermined position before the first case and the second case are connected, and being able to position the parking support on the rotation trajectory of the parking pole in the unlocking direction by connecting the first case and the second case. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view of a parking device according to an embodiment. [Figure 2] FIG. 2 is a perspective view of the first and second cases separated from each other. [Figure 3] FIG. 2 is an enlarged side view showing the first case, the parking gear, the rod, the cam, the parking pole, the torsion spring, and the positioning member. [Figure 4] FIG. 4 is a cross-sectional view taken along the arrow 4-4 in FIG. [Figure 5] FIG. 4 is an enlarged perspective view of a second case and a parking support. [Figure 6] 10 is a perspective view of a portion of the parking device when the second case is moved closer to the first case. FIG. [Figure 7]4 is a cross-sectional view taken along the line 4-4 of FIG. 3 when the second case is moved closer to the first case than in the state of FIG. 6. FIG. [Figure 8] 8 is a cross-sectional view corresponding to FIG. 7 when the second case is connected to the first case. FIG. [Figure 9] FIG. 2 is an enlarged view showing the first case, parking gear, rod, cam, parking pole, torsion spring, positioning member, and parking support when the second case is connected to the first case. [Figure 10] 10 is a schematic diagram showing the positional relationship between the parking pole and the parking support when the second case is connected to the first case. FIG. [Figure 11] 10 is a perspective view showing the inside of the parking device when the second case is connected to the first case. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the parking device according to the present invention will be described with reference to the accompanying drawings. In the drawings, the arrow FR indicates the front side in the longitudinal direction of the vehicle, the arrow LH indicates the left side in the lateral direction of the vehicle, and the arrow UP indicates the upper side in the vertical direction of the vehicle.

[0016] 1 is mounted on a vehicle. Transaxle 10 includes a first case (transaxle case) 15, a second case (housing) 50, and a parking mechanism 65.

[0017] As shown in FIGS. 1 and 2, the first case 15 made of metal includes a hollow cylindrical first main body portion 16 and a first flange 17 provided at the right end portion of the first main body portion 16.

[0018] 2, 3, and 4, a first support portion 18 is provided inside the first main body portion 16. The first support portion 18 is a portion that supports various members. The members supported by the first support portion 18 include, for example, a power transmission shaft (central shaft) 22, a parking gear 24, a rod 28, a parking pole 35, a positioning member 41, an outer lever (not shown), a shaft (not shown), and a parking lever (not shown).

[0019] A power transmission shaft 22 rotates about its own axis due to a rotational driving force generated by an electric motor (not shown) provided inside the transaxle 10 and extends in the left-right direction of the vehicle. The power transmission shaft 22 is supported by a first support portion 18 so as to be rotatable about its own axis. A gear portion 25 is provided on the outer periphery of a parking gear 24 fixed to the outer periphery of the power transmission shaft 22. The gear portion 25 has a plurality of gear teeth 26 arranged in the circumferential direction. As will be described later, when the rotation of the parking gear 24 is restricted by a parking pole 35, the rotation of the power transmission shaft 22 is restricted.

[0020] The vehicle is provided with a shift lever (not shown) that can be moved to P (parking) range, D (drive) range, N (neutral) range, and R (reverse) range.

[0021] Rod 28, which is connected to the shift lever via a linkage mechanism (not shown), has a linear portion 30 that extends linearly and generally parallel to the left-right direction. This linkage mechanism includes, for example, a shaft that rotates in conjunction with the operation of the shift lever, and a parking lever that is fixed to the shaft, supports rod 28, and swings in conjunction with the shaft. As the shift lever moves, rod 28 moves back and forth in a direction generally parallel to its own axis. A generally conical cam 32 is provided on linear portion 30 so as to be movable along linear portion 30. Cam 32 is biased toward the tip of linear portion 30 by the biasing force of a compression coil spring 33 (see FIG. 11 ) provided on linear portion 30, and a stopper prevents cam 32 from moving toward the tip of linear portion 30 beyond the position shown in FIGS. 6 and 11 .

[0022] As shown in Fig. 3, a parking pole 35 is rotatably supported on the first support portion 18 via a support shaft 36 extending in the left-right direction. Furthermore, a torsion spring (first biasing member) 37 that biases the parking pole 35 to rotate clockwise in Fig. 3 is provided on the first support portion 18 and the parking pole 35. An engagement claw 38 that can engage with the gear portion 25 (gear teeth 26) of the parking gear 24 is provided on the tip of the parking pole 35. Furthermore, an engagement recess 39 is formed in a portion of the outer circumferential surface of the parking pole 35.

[0023] As shown in Figures 3 and 4, the first support part 18 is provided with a storage hole 40, which is a bottomed hole. The axis of the storage hole 40 is parallel to the left-right direction. A metallic positioning member 41 is movably inserted into the storage hole 40. The positioning member 41 is approximately cylindrical. The end face of the positioning member 41 opposite the bottom of the storage hole 40 is a pressed surface 42 consisting of a plane perpendicular to the axis of the positioning member 41. Furthermore, a tapered surface 43 is formed on the outer periphery of the end of the positioning member 41 on the pressed surface 42 side, the diameter of which gradually decreases toward the pressed surface 42 side. The outer diameter of the positioning member 41 excluding the tapered surface 43 is smaller than the diameter of the storage hole 40. Therefore, the positioning member 41 can move smoothly left-right relative to the storage hole 40. Furthermore, one end of a compression coil spring (second biasing member) 45 is fixed to the bottom surface of the storage hole 40, and the other end of the compression coil spring 45 is fixed to the end surface of the positioning member 41 opposite the pressed surface 42. When the compression coil spring 45 is substantially free, the positioning member 41 is located at the restricted position shown in FIGS. 4 and 6. When the positioning member 41 is located at the restricted position, the outer circumferential surface of the positioning member 41 at a portion located closer to the compression coil spring 45 than the tapered surface 43 is located on the rotation trajectory of the parking pawl 35. Therefore, when the positioning member 41 is located at the restricted position, as shown in FIGS. 4 and 6, the engaging recess 39 of the parking pawl 35 (the outer circumferential surface of the parking pawl 35 constituting the engaging recess 39) comes into contact with the outer circumferential surface of the positioning member 41, and the rotation of the parking pawl 35 in the clockwise direction in FIG. 3 is restricted by the positioning member 41. In the following description, the clockwise direction in FIG. 3 is referred to as the unlocking direction. Furthermore, the positioning member 41 can move toward the bottom of the storage hole 40 to the allowable position shown in Fig. 8 against the biasing force of the compression coil spring 45. When the positioning member 41 is in the allowable position, the amount of protrusion of the positioning member 41 to the right from the storage hole 40 is smaller than the amount of protrusion when the positioning member 41 is in the restricted position. Furthermore, when the positioning member 41 is in the allowable position, the positioning member 41 is not located on the rotation trajectory of the parking pole 35, as shown in Fig. 8.

[0024] As shown in FIGS. 1 and 2, the second case 50 made of metal includes a hollow cylindrical second main body portion 51 and a second flange 52 provided at the left end of the second main body portion 51.

[0025] As shown in FIG. 5, a second support portion 53 is provided inside the second main body portion 51 of the second case 50. As shown in FIGS. 5 and 11, the second support portion 53 is provided with a rod receiving hole 55, which is a bottomed hole. The axis of the rod receiving hole 55 is parallel to the left-right direction. A parking support 57 is fixed to the entrance end of the rod receiving hole 55. The parking support 57 is provided with a through hole 58 that is coaxial with the rod receiving hole 55. Furthermore, a guide wall portion 59 that is approximately arc-shaped when viewed in the left-right direction protrudes from the tip end (left end) of the parking support 57. The inner circumferential surface of the guide wall portion 59 is tapered about the axis of the through hole 58.

[0026] Furthermore, a pressing protrusion (pressing member) 62 is protruded from the second support portion 53. The cross-sectional shape of the pressing protrusion 62 is non-circular. More specifically, the cross-sectional shape of the pressing protrusion 62 is a substantially oval shape. The tip surface of the pressing protrusion 62 is a pressing surface 63 consisting of a plane perpendicular to the left-right direction. The pressing surface 63 is located to the left of the tip surface (left end surface) of the parking support 57.

[0027] Of the components described above, the power transmission shaft 22, parking gear 24, rod 28, cam 32, parking pole 35, positioning member 41, rod receiving hole 55, parking support 57, outer lever, shaft, and parking lever are components of the parking mechanism 65.

[0028] Next, we will explain how to assemble the transaxle 10 by connecting the first case 15 and the second case 50. At this time, as shown in Figures 3 and 4, the outer peripheral surface of the positioning member 41, which is positioned in the restricted position, comes into contact with the engagement recess 39 of the parking pole 35, thereby restricting rotation of the parking pole 35 in the unlocking direction.

[0029] First, as shown in FIG. 2, the first flange 17 of the first case 15 and the second flange 52 of the second case 50, which are separated from each other in the left-right direction, are brought into opposition. That is, the first case 15 and the second case 50 are positioned so as to be approximately coaxial. Furthermore, a positioning hole (not shown) provided on the right side of the first flange 17 and a positioning pin (not shown) provided on the left side of the second flange 52 are brought into opposition in the left-right direction. When the positioning hole and the positioning pin are opposed to each other, the positioning member 41 provided on the first case 15 and the pressing protrusion 62 provided on the second case 50 face each other in the left-right direction. Next, as shown in FIG. 6, the first case 15 and the second case 50 are brought into opposition to each other along their axes.

[0030] When the distance between the first flange 17 and the second flange 52 becomes less than a predetermined distance, the positioning pin enters the positioning hole, and the tip of the straight portion 30 of the rod 28 provided in the first case 15 enters the through hole 58 of the parking support 57 supported by the second case 50 and the rod receiving hole 55 of the second support portion 53.

[0031] When the distance between the first flange 17 and the second flange 52 becomes even shorter, the pressing surface 63 of the pressing protrusion 62 of the second case 50 comes into contact with the pressed surface 42 of the positioning member 41 in the restricted position (not shown).

[0032] When the distance between the first flange 17 and the second flange 52 becomes even shorter, the pressing protrusion 62 pushes the positioning member 41 toward the permitted position (left side) against the biasing force of the compression coil spring 45, as shown in FIG. 7. This causes the positioning member 41 to temporarily move away from the engagement recess 39, and the tapered surface 43 and the left edge of the engagement recess 39 become aligned in the left-right direction. Furthermore, the biasing force of the torsion spring 37 causes the parking pawl 35 to rotate slightly in the unlock direction, and the left edge of the engagement recess 39 comes into contact with the tapered surface 43, as shown in FIG. 7. This restricts rotation of the parking pawl 35 in the unlock direction. Furthermore, as shown by the dashed line in FIG. 10, the parking pawl 35 is positioned slightly to the left of the parking support 57 (guide wall portion 59).

[0033] When the distance between the first flange 17 and the second flange 52 becomes even shorter, the first flange 17 and the second flange 52 come into contact with each other, as shown in FIG. 1 . At this time, as shown in FIG. 8 , the positioning member 41 is moved to the permitted position by the pressing protrusion 62. As a result, the positioning member 41 is positioned to the left of the rotation path of the parking pole 35. Therefore, the parking pole 35 rotates in the unlock direction due to the biasing force of the torsion spring 37. At this time, as shown by the two-dot chain line in FIG. 10 , the guide wall portion 59 of the parking support 57 is positioned on the rotation path of the parking pole 35. Therefore, as shown by the two-dot chain line in FIG. 9 and the two-dot chain line in FIG. 10 , the parking pole 35 collides with one circumferential end face 59E of the guide wall portion 59, and the guide wall portion 59 restricts the rotation of the parking pole 35 in the unlock direction. In other words, the member restricting the rotation of the parking pole 35 in the unlock direction is switched from the positioning member 41 to the parking support 57. At this time, as shown in FIG. 8, a part of the tapered surface 43 of the positioning member 41 and the left edge of the engaging recess 39 of the parking pole 35 face each other in the left-right direction.

[0034] In this state, first flange 17 and second flange 52 are fixed together using a plurality of bolts 47 and nuts (not shown), thereby completing transaxle 10 shown in Figure 1. When transaxle 10 is completed, guide wall portion 59 of parking support 57 faces cam 32, enabling guide wall portion 59 to support cam 32.

[0035] The completed transaxle 10 is mounted on a vehicle, and the power transmission shaft 22 is connected to the left and right drive wheels (not shown) of the transaxle 10 via a differential mechanism. When the shift lever is positioned in a predetermined range other than the P range, the parking pole 35, which is biased to rotate in the unlock direction, comes into contact with the end face 59E of the guide wall portion 59 of the parking support 57.

[0036] When the shift lever is moved from the predetermined range, the linear portion 30 of the rod 28 reciprocates in a direction substantially parallel to its axis. Accordingly, the cam 32 advances and retreats along the extension direction of the linear portion 30. When the shift lever is moved to the P range, the cam 32 contacts the outer periphery of the parking pole 35 and rotates the parking pole 35 counterclockwise in FIG. 3 about the support shaft 36. In the following explanation, the counterclockwise direction in FIG. 3 is referred to as the locking direction. Therefore, the parking pole 35 moves away from the end surface 59E of the guide wall portion 59 of the parking support 57, and the engaging claw 38 engages with the gear portion 25 (gear teeth 26) of the parking gear 24 (see the two-dot chain line in FIG. 3). The rotational position of the parking pole 35 at this time is the locked position. Therefore, the rotation of the parking gear 24 is restricted by the parking pole 35, and the rotation of the power transmission shaft 22 is restricted, thereby locking the left and right drive wheels. When the shift lever is moved to the predetermined range, the contact portion of the cam 32 with the outer periphery of the parking pole 35 changes, causing the parking pole 35 to rotate in the unlock direction. When the shift lever returns to the predetermined range, the parking pole 35 again comes into contact with the end face 59E of the guide wall portion 59.

[0037] If a malfunction occurs in the transaxle 10, the first case 15 and the second case 50 can be separated by removing the bolts 47 and nuts from the first flange 17 and the second flange 52. When the first case 15 and the second case 50 are moved relative to each other by a small distance in the direction in which the first flange 17 and the second flange 52 move apart, the parking pawl 35, the positioning member 41, and the pressing protrusion 62 return to the positional relationship shown in FIG. 7 . That is, the tapered surface 43 of the positioning member 41 contacts the left edge of the engagement recess 39. This causes the parking pawl 35 to rotate slightly in the locking direction against the biasing force of the torsion spring 37. This causes the engagement recess 39 of the parking pawl 35 to move away from the end surface 59E of the guide wall portion 59.

[0038] When the first flange 17 and the second flange 52 move further apart, the parking pole 35, positioning member 41, and pressing protrusion 62 return to the positional relationship shown in Figure 4. That is, the pressing protrusion 62 moves away from the positioning member 41 to the right, and the positioning member 41 is again positioned in the restricted position by the biasing force of the compression coil spring 45, which has returned to its free state. As a result, the engagement recess 39 of the parking pole 35 comes into contact with the outer peripheral surface of the positioning member 41, and the rotation of the parking pole 35 in the unlocking direction is restricted by the positioning member 41.

[0039] As described above, in this embodiment, before the second case 50 is connected to the first case 15, the pressing protrusion 62 of the second case 50 moves to the right away from the positioning member 41 in the restricting position. Therefore, before the first case 15 and the second case 50 are connected, the positioning member 41 in the restricting position comes into contact with the engaging recess 39 of the parking pole 35, thereby restricting rotation of the parking pole 35 in the unlocking direction.

[0040] Furthermore, when the second case 50 is connected to the first case 15, the pressing protrusion 62 pushes the positioning member 41, which is in the restricted position, to the permitted position. Furthermore, by connecting the first case 15 and the second case 50, it becomes possible to position the parking support 57 (guide wall portion 59) on the rotation trajectory of the parking pole 35 in the unlocking direction.

[0041] Furthermore, when the second case 50 connected to the first case 15 is separated from the first case 15, the pressing protrusion 62 moves away from the pressed surface 42 of the positioning member 41, and the positioning member 41 moves to the restricted position due to the compression coil spring 45. Therefore, when the second case 50 is separated from the first case 15, the positioning member 41 can automatically restrict rotation of the parking pole 35 in the unlocking direction.

[0042] Furthermore, the positioning member 41 is formed with a tapered surface 43 that gradually reduces in diameter toward the pressed surface 42 and that can come into contact with the outer periphery (the left edge of the engagement recess 39) of the parking pole 35. Therefore, compared to when the positioning member 41 does not have the tapered surface 43, when the first case 15 and the second case 50 are connected, it is possible to smoothly switch the member that restricts the rotation of the parking pole 35 from the positioning member 41 to the parking support 57.

[0043] If the tapered surface 43 were not formed on the positioning member 41, when the first case 15 and the second case 50 were separated, the pressed surface 42 of the positioning member 41 would come into contact with the left side surface of the parking pole 35 before the positioning member 41 reached the restricted position, and the parking pole 35 might prevent the positioning member 41 from moving to the restricted position. In contrast, in this embodiment, the tapered surface 43 is formed on the positioning member 41. Therefore, compared to when the tapered surface 43 is not formed on the positioning member 41, it is easier to move the positioning member 41 to the restricted position by using the biasing force of the compression coil spring 45 when the first case 15 and the second case 50 are separated.

[0044] 9, when the first case 15 and the second case 50 are connected, the center of the pressing surface 63 of the pressing protrusion 62 is located on the opposite side of the parking pole 35 from the center of the pressed surface 42 of the positioning member 41. Therefore, when the pressing protrusion 62, which is away from the positioning member 41, is moved toward the positioning member 41 located in the restricted position, there is no risk of the pressing protrusion 62 colliding with the parking pole 35.

[0045] Furthermore, when transaxle 10 is in an assembled state, the biasing force of compression coil spring 45 maintains contact between pressed surface 42 of positioning member 41 and pressing surface 63 of pressing protrusion 62. Therefore, while the vehicle is traveling, vibrations generated in the vehicle do not cause positioning member 41 to move left and right and repeatedly collide with pressing surface 63. As a result, no abnormal noise is generated between positioning member 41 and pressing protrusion 62 while the vehicle is traveling.

[0046] The transaxle 10 according to the embodiment has been described above, but the design can be modified as appropriate within the scope of the present invention.

[0047] For example, the outer diameter of the portion of the positioning member 41 excluding the tapered surface 43 may be made substantially the same as the diameter of the storage hole 40, and the compression coil spring 45 may be omitted from the transaxle 10. In this case, the portion of the positioning member 41 excluding the tapered surface 43 is press-fitted into the storage hole 40 with a small force, thereby holding the positioning member 41 in the restricted position before the first case 15 and the second case 50 are connected. Furthermore, when the first case 15 and the second case 50 are connected, the positioning member 41 is pressed by the pressing protrusion 62 and moves to the allowed position, and the positioning member 41 is held in the allowed position by the inner surface of the storage hole 40.

[0048] The outer diameter of the positioning member 41 excluding the tapered surface 43 may be made slightly smaller than the diameter of the storage hole 40, the compression coil spring 45 may be omitted, and an air vent through-hole may be provided in the first case 15 that connects the inner surface of the storage hole 40 and the outer surface of the first case 15. The diameter of this through-hole is much smaller than the diameter of the storage hole 40. In this modification, before the first case 15 and the second case 50 are connected, the positioning member 41 is held in the restricted position by the pressure of the air that fills the space in the storage hole 40 to the left of the left end face of the positioning member 41. Furthermore, when the first case 15 and the second case 50 are connected, the positioning member 41 is pressed by the pressing protrusion 62 and moves to the allowed position, and some of the air is discharged to the outside of the first case 15 through the air vent through-hole.

[0049] The second biasing member provided in transaxle 10 is not limited to compression coil spring 45. For example, a rubber member may be used as the second biasing member.

[0050] The shape of the pressing protrusion 62 may be different from that in the above embodiment.

[0051] The positioning member 41 may be made of a material other than metal. [Explanation of symbols]

[0052] 10 Transaxle (parking device) 15 First case (transaxle case) 22 Power transmission shaft (center shaft) 24 Parking gear 28 Rod 32 Cam 35 Parking Pole 37 Torsion spring (first biasing member) 40 Storage hole 41 Positioning member 45 compression coil spring (second biasing member) 50 Second case (housing) 57 Parking Support 62 Pressing protrusion (pressing member)

Claims

1. a first case mounted on the vehicle; a parking gear provided inside the first case, rotatable about a central axis, and configured to lock drive wheels of the vehicle by restricting rotation; a parking pole rotatably provided inside the first case, the parking pole engaging with the parking gear when the parking pole is positioned at a lock position to restrict rotation of the parking gear; a first biasing member provided inside the first case and configured to rotationally bias the parking pole in an unlocking direction, which is a direction away from the parking gear; a rod provided inside the first case and movable in a predetermined direction; a cam provided on the rod, the cam coming into contact with the parking pole when the rod moves, thereby rotating the parking pole toward the lock position and in the unlock direction; a positioning member movably provided in a storage hole formed inside the first case, the positioning member being movable between an allowable position where the positioning member is separated from the outer periphery of the parking pole to allow rotation of the parking pole in the unlocking direction, and a restricting position where the positioning member protrudes from the storage hole by a greater amount than the allowable position and contacts the outer periphery to restrict rotation of the parking pole in the unlocking direction; a second case detachable from the first case; a parking support provided inside the second case, the parking support being contactable with the cam when the second case is connected to the first case and positioned on a rotation path of the parking pole in the unlocking direction; a pressing member that is provided inside the second case, that moves away from the positioning member that is in the restricted position before the second case is connected to the first case, and that presses the positioning member that is in the restricted position to the allowed position when the second case is connected to the first case; A parking device comprising:

2. 2. The parking device according to claim 1, wherein a second biasing member is provided in the storage hole to bias the positioning member toward the restricted position.

3. the positioning member is a cylindrical member, 3. The parking device according to claim 1, wherein the end of the positioning member on the pressing member side is formed with a tapered surface that gradually reduces in diameter as it approaches the pressing member side and that can come into contact with the edge of the outer periphery of the parking pole on the positioning member side when the positioning member moves from the allowable position to the restricted position side.

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