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 Art

[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. An internal space formed between the first case and the second case is provided with a parking gear, a parking pole, a first biasing member, a rod, and a parking support.

[0003] The parking gear is rotatable about a central axis, and the rotation thereof is restricted to lock the drive wheels of the vehicle. The parking pole restricts the rotation of the parking gear by engaging with the parking gear when in the locked position. The first biasing member rotationally biases the parking pole in the unlocking direction, which is the direction away from the parking gear. The rod rotates the parking pole in the locked position side and the unlocking direction by moving in a predetermined direction while engaging with the parking pole. The parking support receives the rod so as to be movable in a predetermined direction and is located on the rotation locus of the parking pole in the unlocking direction. Therefore, when the parking pole contacts the parking support, the parking pole is restricted from rotating further in the unlocking direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

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

[0006] In consideration of the above facts, the present invention aims to provide a parking device that can restrict the rotation of the parking pole in the unlocking direction to a predetermined position before the first case and the second case are connected, and that can position the parking support on the rotational 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 according to claim 1 comprises: a first case mounted on a vehicle; a parking gear provided inside the first case and rotatable about a central axis, which locks the drive wheels of the vehicle by restricting its rotation; a parking pawl provided rotatably inside the first case and which restricts the rotation of the parking gear by engaging with the parking gear when in the locked position; a first biasing member provided inside the first case and which biases the parking pawl to rotate in the unlock direction, which is 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 which contacts the parking pawl when the rod moves, thereby rotating the parking pawl toward the locked position and in the unlock direction; and a movably provided in a storage hole formed inside the first case, The parking pole is provided with a positioning member that is movable between an allowable position that is away from the outer circumference of the parking pole and allows the parking pole to rotate in the unlocking direction, and a restricting position that protrudes more from the storage hole than the allowable position and contacts the outer circumference, restricting the rotation of the parking pole in the unlocking direction; a second case that is detachable from the first case; a parking support provided inside the second case, which is contactable by the cam and located on the rotational trajectory of the parking pole in the unlocking direction when the second case is connected to the first case; and a pressing member provided inside the second case, which is away from the positioning member in the restricting position before the second case is connected to the first case, and pushes the positioning member 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 separates from the positioning member in the restricted position. Before the first and second cases are connected, the positioning member in the restricted position contacts the outer circumference of the parking pole, thereby restricting the rotation of the parking pole in the unlocking direction. Furthermore, when the second case is connected to the first case, the pressing member pushes the positioning member in the restricted position to the allowable position. Therefore, by connecting the first and second cases, it becomes possible to position the parking support on the rotational trajectory of the parking pole in the unlocking direction.

[0009] The parking device of claim 2 is provided in claim 1, wherein a second biasing member is provided in the storage hole for biasing 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 positioning member is moved to the restricted position by the second biasing member. Therefore, when the second case is separated from the first case, the positioning member can automatically restrict the rotation of the parking pole in the unlocking direction.

[0011] The parking device according to claim 3 is the parking device according to claim 1 or claim 2, wherein the positioning member is a cylindrical member, and a tapered surface is formed at the end of the positioning member on the pressing member side, which gradually decreases in diameter toward the pressing member side and can contact the edge of the outer circumference of the parking pole on the positioning member side when the positioning member moves from the allowable position toward the restricted position side.

[0012] In the parking device of claim 3, a tapered surface is formed on the end of the positioning member, which is a cylindrical member, on the side facing the pressing member. This tapered surface gradually decreases in diameter towards the pressing member and can contact the edge of the outer circumference of the parking pawl on the positioning member side when the positioning member moves from the allowable position to the restricted position. Therefore, compared to the case where the tapered surface is not formed, when the first case and the second case are connected, it is possible to smoothly switch the member that restricts the rotation of the parking gear from the positioning member to the parking support. Also, compared to the case where 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 the rotation of the parking pawl in the unlocking direction. [Effects of the Invention]

[0013] As described above, the parking device according to the present invention has the excellent effect that, before the first case and the second case are connected, the rotation of the parking pole in the unlocking direction can be restricted at a predetermined position, and by connecting the first case and the second case, the parking support can be positioned on the rotational trajectory of the parking pole in the unlocking direction. [Brief explanation of the drawing]

[0014] [Figure 1] This is a perspective view of a parking device according to an embodiment. [Figure 2] This is a perspective view of the separated state of Case 1 and Case 2. [Figure 3] This is a side view showing an enlarged view of the first case, parking gear, rod, cam, parking pawl, torsion spring, and positioning member. [Figure 4] This is a cross-sectional view along the line 4-4 in Figure 3. [Figure 5] This is a perspective view showing the second case and parking support in more detail. [Figure 6] This is a perspective view of a part of the parking device when the second case is brought close to the first case. [Figure 7]Fig. 4 is a cross-sectional view taken along the cutting line of the 4-4 arrow in Fig. 3 when the second case is further approximated from the state of Fig. 6 with respect to the first case. [Figure 8] Fig. 5 is a cross-sectional view corresponding to Fig. 7 when the second case is connected to the first case. [Figure 9] Fig. 8 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] Fig. 9 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. [Figure 11] Fig. 10 is a perspective view showing the inside of the parking device when the second case is connected to the first case.

Embodiments for Carrying out the Invention

[0015] Hereinafter, embodiments of a parking device according to the present invention will be described with reference to the accompanying drawings. The arrow FR appropriately shown in the figures indicates the front side in the vehicle front-rear direction, the arrow LH indicates the left side in the vehicle left-right direction, and the arrow UP indicates the upper side in the vehicle up-down direction.

[0016] The transaxle (parking device) 10 shown in Fig. 1 is mounted on a vehicle. The 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 metal first case 15 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] As shown in Figures 2, 3, and 4, a first support section 18 is provided inside the first main body section 16. The first support section 18 is a part that supports various components. Components supported by the first support section 18 include, for example, a power transmission shaft (central shaft) 22, a parking gear 24, a rod 28, a parking pawl 35, a positioning member 41, an outer lever (not shown), a shaft (not shown), and a parking lever (not shown).

[0019] The power transmission shaft 22, which rotates around its own axis due to the rotational driving force generated by an electric motor (not shown) located inside the transaxle 10, 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 around its own axis. A gear portion 25 is provided on the outer circumference of a parking gear 24 fixed to the outer circumference 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 the parking pawl 35, the rotation of the power transmission shaft 22 is restricted.

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

[0021] A rod 28, linked to the shift lever via a linkage mechanism (not shown), has a linear portion 30 that extends linearly in a direction substantially 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 the rod 28, and swings in conjunction with the shaft. As the shift lever moves, the rod 28 reciprocates in a direction substantially parallel to its own axis. A substantially conical cam 32 is provided on the linear portion 30 so as to be movable along the linear portion 30. The cam 32 is biased toward the tip of the linear portion 30 by the biasing force of a compression coil spring 33 (see Figure 11) provided on the linear portion 30, and is restricted by a stopper from moving toward the tip of the linear portion 30 from the position shown in Figures 6 and 11.

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

[0023] As shown in Figures 3 and 4, the first support portion 18 is provided with a bottomed storage hole 40. The axis of the storage hole 40 is parallel to the left-right direction. A metal positioning member 41 is movably inserted into the storage hole 40. The positioning member 41 is substantially cylindrical in shape. The end face of the positioning member 41 opposite the bottom of the storage hole 40 is a pressed surface 42, which is a plane perpendicular to the axis of the positioning member 41. Furthermore, a tapered surface 43 is formed on the outer circumference of the end of the positioning member 41 on the pressed surface 42 side, which gradually decreases in diameter towards the pressed surface 42 side. The outer diameter of the part 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 in the left-right direction 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 to the pressed surface 42. When the compression coil spring 45 is substantially free, the positioning member 41 is located in the restricted position shown in Figures 4 and 6. When the positioning member 41 is in the restricted position, the outer circumferential surface of the part of the positioning member 41 that is located on the compression coil spring 45 side of the tapered surface 43 is located on the rotational trajectory of the parking pole 35. Therefore, when the positioning member 41 is in the restricted position, as shown in Figures 4 and 6, the engagement recess 39 of the parking pole 35 (the outer circumferential surface of the parking pole 35 that constitutes it) comes into contact with the outer circumferential surface of the positioning member 41, and the clockwise rotation of the parking pole 35 in Figure 3 is restricted by the positioning member 41. In the following description, the clockwise direction in Figure 3 will be referred to as the unlock direction. Furthermore, the positioning member 41 is movable towards the bottom of the storage hole 40 to the permissible position shown in Figure 8, against the biasing force of the compression coil spring 45. When the positioning member 41 is in the permissible position, the amount it protrudes to the right from the storage hole 40 is smaller than the amount it protrudes when it is in the restricted position. Moreover, when the positioning member 41 is in the permissible position, it is not located on the rotational trajectory of the parking pole 35, as shown in Figure 8.

[0024] As shown in Figures 1 and 2, the second metal case 50 comprises 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 Figure 5, a second support portion 53 is provided inside the second main body portion 51 of the second case 50. As shown in Figures 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 forms a roughly arc shape when viewed in the left-right direction is provided protruding from the tip portion (left end) of the parking support 57. The inner circumferential surface of the guide wall portion 59 is tapered around the axis of the through hole 58.

[0026] Furthermore, a pressing projection (pressing member) 62 is provided protruding from the second support portion 53. The cross-sectional shape of the pressing projection 62 is non-circular. More specifically, the cross-sectional shape of the pressing projection 62 is roughly oval. The tip surface of the pressing projection 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] Among the configurations described above, the power transmission shaft 22, parking gear 24, rod 28, cam 32, parking pawl 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, the procedure for assembling the transaxle 10 by connecting the first case 15 and the second case 50 will be explained. At this time, as shown in Figures 3 and 4, the rotation of the parking pawl 35 in the unlocking direction is restricted by the outer surface of the positioning member 41, which is located in the restricted position, contacting the engaging recess 39 of the parking pawl 35.

[0029] First, as shown in Figure 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 that they are approximately coaxial. Furthermore, the positioning hole (not shown) provided on the right side of the first flange 17 and the 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 in opposition, the positioning member 41 provided on the first case 15 and the pressing projection 62 provided on the second case 50 are brought into opposition in the left-right direction. Subsequently, as shown in Figure 6, the first case 15 and the second case 50 are brought closer to each other along their respective axes.

[0030] When the distance between the first flange 17 and the second flange 52 becomes less than or equal to 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] As the distance between the first flange 17 and the second flange 52 becomes even shorter, the pressing surface 63 of the pressing projection 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] As the distance between the first flange 17 and the second flange 52 becomes even shorter, the pressing projection 62 pushes the positioning member 41 toward the allowable position (left side) against the biasing force of the compression coil spring 45, as shown in Figure 7. This temporarily separates the positioning member 41 from the engagement recess 39, causing the tapered surface 43 and the left edge of the engagement recess 39 to align 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 Figure 7. This restricts the parking pawl 35 from rotating in the unlock direction. Additionally, as shown by the dashed line in Figure 10, the parking pawl 35 is positioned slightly to the left of the parking support 57 (guide wall 59).

[0033] As 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, as shown in Figure 1. At this time, as shown in Figure 8, the positioning member 41 is moved to an acceptable position by the pressing projection 62. As a result, the positioning member 41 is positioned to the left of the rotation trajectory 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 dashed line in Figure 10, the guide wall portion 59 of the parking support 57 is positioned on the rotation trajectory of the parking pole 35. Therefore, as shown by the dashed line in Figure 9 and the dashed line in Figure 10, the parking pole 35 collides with one end face 59E in the circumferential direction of the guide wall portion 59, and the rotation of the parking pole 35 in the unlock direction is restricted by the guide wall portion 59. In other words, the member that restricts the rotation of the parking pole 35 in the unlock direction switches from the positioning member 41 to the parking support 57. At this time, as shown in Figure 8, a portion of the tapered surface 43 of the positioning member 41 and the left edge of the engagement recess 39 of the parking pole 35 face each other in the left-right direction.

[0034] In this state, the first flange 17 and the second flange 52 are fixed using multiple bolts 47 and nuts (not shown), completing the transaxle 10 shown in Figure 1. Once the transaxle 10 is completed, the guide wall portion 59 of the parking support 57 and the cam 32 face each other, and the guide wall portion 59 becomes capable of supporting the cam 32.

[0035] The completed transaxle 10 is mounted on the 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 in a predetermined range other than the P range, the parking pawl 35, which is rotationally biased in the unlock direction, contacts 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 own axis. Consequently, the cam 32 moves back and forth along the extension of the linear portion 30. When the shift lever is moved to the P range, the cam 32 contacts the outer circumference of the parking pawl 35, causing the parking pawl 35 to rotate counterclockwise around the support shaft 36 in the direction shown in Figure 3. In the following description, the counterclockwise direction in Figure 3 will be referred to as the locking direction. As a result, the parking pawl 35 separates from the end face 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 dashed line in Figure 3). The rotational position of the parking pawl 35 at this time is the locking position. Therefore, the rotation of the parking gear 24 is restricted by the parking pawl 35, and the rotation of the power transmission shaft 22 is restricted, thus locking the left and right drive wheels. When the shift lever moves to the predetermined range, the contact point between the cam 32 and the outer circumference of the parking pawl 35 changes, causing the parking pawl 35 to rotate in the unlock direction. When the shift lever returns to the predetermined range, the parking pawl 35 contacts the end face 59E of the guide wall 59 again.

[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 a small distance relative to each other in the direction that separates the first flange 17 and the second flange 52, the parking pole 35, the positioning member 41 and the pressing projection 62 return to the positional relationship shown in Figure 7. That is, the tapered surface 43 of the positioning member 41 comes into contact with the left edge of the engagement recess 39. As a result, the parking pole 35 is rotated slightly in the locking direction against the biasing force of the torsion spring 37. This causes the engagement recess 39 of the parking pole 35 to move away from the end face 59E of the guide wall 59.

[0038] As the first flange 17 and the second flange 52 move further apart, the parking pole 35, the positioning member 41, and the pressing projection 62 return to the positional relationship shown in Figure 4. That is, the pressing projection 62 moves to the right of the positioning member 41, and the biasing force of the compression coil spring 45, which has returned to its free state, causes the positioning member 41 to return to the restricted position. As a result, the engaging recess 39 of the parking pole 35 contacts the outer circumferential 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 projection 62 of the second case 50 moves to the right of 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 contacts the engaging recess 39 of the parking pole 35, thereby restricting the 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 projection 62 pushes the positioning member 41, which is in the restricted position, to the allowable position. By further 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 rotational trajectory of the parking pole 35 in the unlocking direction.

[0041] Furthermore, when the second case 50, which is connected to the first case 15, is separated from the first case 15, the pressing projection 62 moves away from the pressed surface 42 of the positioning member 41, and the positioning member 41 moves to the restricted position by 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 the rotation of the parking pole 35 in the unlocking direction.

[0042] Furthermore, the positioning member 41 has a tapered surface 43 that gradually decreases in diameter towards the pressed surface 42 and can contact the outer circumference of the parking pole 35 (the left edge of the engaging recess 39). Therefore, compared to a case where the positioning member 41 does not have a 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] Incidentally, if the positioning member 41 does not have a tapered surface 43, when the first case 15 and the second case 50 are separated, the pressed surface 42 of the positioning member 41 may come into contact with the left side of the parking pole 35 before the positioning member 41 reaches the restricted position, and the parking pole 35 may prevent the positioning member 41 from moving to the restricted position. In contrast, in this embodiment, the positioning member 41 has a tapered surface 43. Therefore, compared to the case where the positioning member 41 does not have a tapered surface 43, when the first case 15 and the second case 50 are separated, it is easier to move the positioning member 41 to the restricted position using the biasing force of the compression coil spring 45.

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

[0045] Furthermore, when the transaxle 10 is assembled, the biasing force of the compression coil spring 45 maintains contact between the pressed surface 42 of the positioning member 41 and the pressing surface 63 of the pressing projection 62. Therefore, during vehicle operation, the positioning member 41 does not repeatedly collide with the pressing surface 63 while moving in the left-right direction due to vibrations generated in the vehicle. As a result, no abnormal noise is generated between the positioning member 41 and the pressing projection 62 during vehicle operation.

[0046] Although the transaxle 10 according to the embodiment has been described above, the design can be modified as appropriate without departing from the spirit 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 approximately 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 pressed 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, pushed by the pressing projection 62, moves to the allowable position, and the positioning member 41 is held in the allowable position by the inner surface of the storage hole 40.

[0048] The outer diameter of the portion of the positioning member 41 excluding the tapered surface 43 may be made slightly smaller than the diameter of the storage hole 40, and the compression coil spring 45 may be omitted. In addition, the first case 15 may be provided with through holes for air venting that open on the inner surface of the storage hole 40 and the outer surface of the first case 15. The diameter of these through holes is much smaller than the diameter of the storage hole 40. In this modified example, 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 filling the space to the left of the left end face of the positioning member 41 in the storage hole 40. Furthermore, when the first case 15 and the second case 50 are connected, the positioning member 41, pushed by the pressing projection 62, moves to the allowable position, and some of the air is discharged to the outside of the first case 15 through the through holes for air venting.

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

[0050] The shape of the pressing projection 62 may differ from that of the above embodiment.

[0051] The positioning member 41 may be made of a material other than metal. Furthermore, the positioning member 41 does not need to have a tapered surface 43. [Explanation of Symbols]

[0052] 10. Transaxle (parking device) 15. Case 1 (Transaxle Case) 22 Power transmission shaft (central shaft) 24 Parking gear 28 rods 32 Cam 35 Parking poles 37 Torsion spring (first biasing member) 40 Storage hole 41 Positioning member 45 Compression coil spring (second biasing member) 50. Case 2 (Housing) 57 Parking Support 62 Pressing projection (pressing member)

Claims

1. The first case to be installed in the vehicle, A parking gear is provided inside the first case, is rotatable around a central axis, and locks the drive wheels of the vehicle by restricting its rotation. A parking pawl is rotatably provided inside the first case and, when in the locked position, engages with the parking gear to restrict the rotation of the parking gear. A first biasing member is provided inside the first case and biases the parking pawl to rotate in the unlock direction, which is away from the parking gear. A rod provided inside the first case and movable in a predetermined direction, A cam provided on the rod, which contacts the parking pole when the rod moves, thereby rotating the parking pole toward the locked position and toward the unlocked position, A positioning member is provided movably in a storage hole formed inside the first case, and is movable between a permissible position that is away from the outer circumference of the parking pole and allows the parking pole to rotate in the unlocking direction, and a restricting position that protrudes more from the storage hole than the permissible position and contacts the outer circumference, thereby restricting the rotation of the parking pole in the unlocking direction. A second case that is detachable from the first case, A parking support provided inside the second case, which, when the second case is connected to the first case, allows contact with the cam and is located on the rotational trajectory of the parking pole in the unlocking direction, A pressing member provided inside the second case, which moves away from the positioning member in the restricting position before the second case is connected to the first case, and pushes the positioning member in the restricting position to the allowable position when the second case is connected to the first case, A parking device equipped with [a specific feature].

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

3. The positioning member is a cylindrical member, The parking device according to claim 1 or 2, wherein a tapered surface is formed at the end of the positioning member on the pressing member side, the tapered surface gradually decreasing in diameter toward the pressing member side and capable of contacting the edge of the outer circumference of the parking pole on the positioning member side when the positioning member moves from the allowable position toward the restricted position side.

Images