Parking lock device

Abstract

To reduce dispersion of a roller nipping attitude by filling a clearance with a case.SOLUTION: The mechanism includes a linear motion mechanism, a movable member that moves the lock member, a support member that supports the movable member, and a spring, and the support member includes a body member that is fixed to the case and supports the movable member such that the movable member can move in the first direction and can be displaced in the second direction, and a contact member that is a separate piece from the body member and can come into contact with the case in the second direction. The movable member includes a first roller that applies a force in the second direction to the lock member, and a second roller that is movable in the first direction while rotating on the contact member and causes the case to receive a reaction force related to the force in the second direction via the contact member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] In a parking lock device in which a locking member that releasably engages with a parking gear is moved based on the linear movement of a movable member to switch the state of the parking gear between a locked state and an unlocked state, a technology is known in which the locked state is maintained by biasing the movable member with a spring (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] German patent number 102009061774 [Patent Document 2] US Patent Application Publication No. 2023 / 0175556 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the above-described configuration, the sliding resistance (sliding resistance caused by the linear movement of the movable member) against the support member that movably supports the movable member tends to be large, which leads to the problem of requiring a high output from the electric motor that moves the movable member.

[0005] In response to this, the sliding resistance can be reduced by supporting the movable member on the support member via rollers (for example, Patent Document 2).

[0006] When the support member supports the movable member via a roller, the reaction force received from the parking pole via the roller can be appropriately transmitted to the case via the support member. For example, by abutting the portion of the support member that forms the rolling surface of the roller (hereinafter also referred to as the "rolling surface portion") against the case, the reaction force can be appropriately transmitted to the case via the support member. This reduces the burden on the fastening points compared to when the reaction force is received only at the fastening points of the support member to the case, and reduces the need to increase the strength of the support member.

[0007] However, when assembling the support member to the case, variations in the positional relationship between the rolling surface portion of the support member and the case occur, and gaps are likely to form between the rolling surface portion and the case. If such variations prevent the rolling surface portion of the support member from abutting against the case, problems such as the reaction force not being properly transmitted will occur.

[0008] Therefore, in one aspect, an object of the present disclosure is to fill the gap with the case and reduce the variation in the position of the rollers when they are sandwiched. [Means for solving the problem]

[0009] On one side, a case fixed to the vehicle body; An electric motor; a mechanism including a locking member that is releasably engaged with the parking gear, and the locking member is moved based on the output of the electric motor to switch the state of the parking gear between a locked state and an unlocked state; The mechanism comprises: a linear motion mechanism that converts the rotational output of the electric motor into linear motion in a first direction; a movable member that moves linearly in the first direction to move the locking member based on an input in the first direction received from the linear motion mechanism; a support member that supports the movable member; a spring that biases the movable member in the first direction so that the locked state or the unlocked state is maintained, The support member is a main body member fixed to the case, the main body member supporting the movable member in a manner that allows the movable member to move in the first direction and to be displaced in a second direction intersecting the first direction; a contact member that is a separate piece from the main body member and that can contact the case in the second direction; The movable member is a first roller that is movable in the first direction while rotating on the locking member and applies a force in the second direction to the locking member; A parking lock device is provided that has a second roller that is movable in the first direction while rotating on the abutment member and that applies a reaction force related to the force in the second direction to the case via the abutment member. [Effects of the Invention]

[0010] According to one aspect of the present disclosure, it is possible to fill the gap with the case and reduce variations in the position of the rollers sandwiched between them. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram schematically illustrating a main part (locked state) of a parking lock device according to the present embodiment. [Figure 1A] 1 is a diagram schematically illustrating a main part (unlocked state) of a parking lock device according to the present embodiment. [Figure 2] FIG. 2 is an enlarged view of part Q2 in FIG. [Figure 3] FIG. 2 is an enlarged view of part Q3 in FIG. [Figure 4] 4 is a cross-sectional view of the portion shown in FIG. 3, taken along an XY plane passing through the roller receiving member. [Figure 5] FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. [Figure 6] FIG. 4 is a cross-sectional view taken along line BB in FIG. 3. [Figure 7] FIG. 10 is an explanatory diagram of a comparative example. [Figure 8]10A and 10B are explanatory diagrams of a position adjustment mechanism provided in a parking lock device according to another embodiment. [Figure 9] FIG. 9 is a cross-sectional view taken along line CC in FIG. 8. DETAILED DESCRIPTION OF THE INVENTION

[0012] Each embodiment will be described in detail below with reference to the accompanying drawings. Note that the dimensional ratios in the drawings are merely examples and are not limiting. Furthermore, shapes and the like in the drawings may be partially exaggerated for the sake of explanation. Furthermore, in the drawings, for ease of viewing, reference symbols may be assigned only to some of the parts that exist with the same attribute.

[0013] In the following description, unless otherwise specified, "connection" means "mechanical connection" and refers to a connection in a manner that allows power transmission.

[0014] 1 and 1A are diagrams that schematically show the main parts of a parking lock device 1 according to this embodiment, with FIG. 1 showing the parking lock device 1 in a locked state and FIG. 1A showing the parking lock device 1 in an unlocked state.

[0015] In FIG. 1, the X direction (an example of a first direction) is defined as an X direction X1 side and an X direction X2 side, and the Z direction (an example of a second direction) is defined as a Z1 side and a Z2 side. For ease of explanation, the Z direction is defined as the up-down direction, with the Z1 side as the upper side and the Z2 side as the lower side. The X direction is parallel to the direction in which the rotation shaft of the electric motor 10 extends. In the following explanation, the Y direction is a direction perpendicular to both the X direction and the Z direction, as shown in later figures (e.g., FIG. 4).

[0016] The parking lock device 1 includes an electric motor 10 and a lock mechanism 21.

[0017] The electric motor 10 is controlled by a control device (not shown). When driven, the electric motor 10 generates a rotational output. The electric motor 10 is connected to the lock mechanism 21 so that the rotational output can be transmitted to the lock mechanism 21.

[0018] The lock mechanism 21 moves the parking pole 42 based on the output of the electric motor 10, thereby switching the state of the parking gear 41 between a locked state (FIG. 1) and an unlocked state (FIG. 1A).

[0019] The locking mechanism 21 of this embodiment includes a parking pole 42 , a linear motion mechanism 210 , a movable member 212 , a coil spring 214 , and a support bracket 216 .

[0020] The parking pole 42 is releasably engaged with the parking gear 41. When the parking pole 42 is engaged with the parking gear 41, a locked state is established in which rotation of the parking gear 41 is prevented. When the parking pole 42 is disengaged from the parking gear 41, an unlocked state is established in which rotation of the parking gear 41 is permitted. The parking pole 42 acts on the parking gear 41 in cooperation with a roller 2126, which will be described later, based on the principle of a cam mechanism.

[0021] The linear motion mechanism 210 converts the rotational output of the electric motor 10 into linear motion in the X direction. In this embodiment, the linear motion mechanism 210 is a slide screw mechanism, but it may also be formed by a ball screw mechanism. The linear motion mechanism 210 includes an output member 2100 for extracting the motion in the X direction as an output.

[0022] When the electric motor 10 rotates in a first rotation direction, the output member 2100 moves toward the X1 side in the X direction. When the electric motor 10 rotates in a second rotation direction (opposite to the first rotation direction), the output member 2100 moves toward the X2 side in the X direction.

[0023] The movable member 212 faces the output member 2100 of the linear motion mechanism 210 in the X direction. In this embodiment, the movable member 212 is arranged on the X2 side of the output member 2100 in the X direction. The movable member 212 is arranged coaxially with the output member 2100 of the linear motion mechanism 210. The movable member 212 may be integrated with the output member 2100, or may be a separate member that can be separated in the X direction. The movable member 212 and the output member 2100 of the linear motion mechanism 210 are capable of transmitting force in the X direction.

[0024] The movable member 212 is movable in the X direction. The movable member 212 directly faces (or is integrated with) the linear motion mechanism 210 on the X1 side in the X direction, and has a rod portion 2120 on the X2 side in the X direction.

[0025] In this embodiment, the movable member 212 includes two rollers 2124 and 2126. The rollers 2124 and 2126 have rotation axes 80 and 81 in the Y direction. The rotation axes 80 and 81 are supported by the movable member 212 so as to be movable in the X direction together with the movable member 212. In this case, the rollers 2124 and 2126 are movable in the X direction together with the movable member 212 while rotating around the rotation axes 80 and 81, respectively.

[0026] Specifically, the rollers 2124, 2126 are movable in the X direction between a locked position on the X1 side in the X direction and an unlocked position on the X2 side in the X direction, as shown in Figure 1. Hereinafter, the range of movement of such rollers 2124, 2126 in the X direction is also referred to as the "predetermined stroke range." Note that by using such rollers 2124, 2126, the force required to move the movable member 212 can be reduced.

[0027] The two rollers 2124, 2126 are preferably disposed at the same position in the X direction, abut in the Z direction, and can transmit a force in the Z direction to each other. In this case, a reaction force from the parking gear 41 received via the parking pole 42 and having a component directed toward the Z1 direction (see force F1 in FIG. 2, etc.) can be transmitted to the support bracket 216 via the rollers 2124, 2126. Note that this reaction force becomes particularly large when the roller 2126 overcomes the convex shape 4290 accompanying the transition from the locked state to the unlocked state. Furthermore, this reaction force becomes relatively large and occurs repeatedly when the parking pole 42 continues to rotate relative to the rotating parking gear 41 in an attempt to achieve the locked state, i.e., when the parking pole 42 repeatedly bounces off the parking gear 41 without fitting into it (so-called ratcheting). Hereinafter, this reaction force will also be referred to as a reaction force due to ratcheting.

[0028] Of the two rollers 2124, 2126, the upper roller 2124 abuts in the Z direction against the lower surface of the upper part of a support bracket 216 (a lower surface whose normal direction is the Z direction) which will be described later. Therefore, displacement of the two rollers 2124, 2126 toward the Z direction Z1 side is restricted mainly by the support bracket 216 via the roller 2124. Note that the upper roller 2124 is able to roll on the lower surface while abutting against the lower surface of the upper part of the support bracket 216.

[0029] Of the two rollers 2124, 2126, the lower roller 2126 abuts against the upper side surface of the parking pole 42 in the Z direction and is capable of rolling on the upper side surface of the parking pole 42. The roller 2126 cooperates with the parking pole 42 to change the rotation angle of the parking pole 42 (the rotation angle around the rotation axis 420) depending on the X-direction position of the movable member 212 including the two rollers 2124, 2126.

[0030] Specifically, when rollers 2124, 2126 reach the locked position together with movable member 212 (see FIG. 1), roller 2126 rotates parking pole 42 around rotation axis 420 due to the shape of the upper side surface of parking pole 42 (convex shape 4290 as viewed in the Y direction). Note that parking pole 42 is biased around rotation axis 420 by spring 422. Spring 422 biases parking pole 42 to rotate to the unlocked position.

[0031] When rollers 2124, 2126 reach the unlocked position together with movable member 212, roller 2126 rotates to the unlocked position (a position away from parking gear 41) due to the shape of the upper side surface of parking pole 42 (convex shape 4290 when viewed in the Y direction).

[0032] The coil spring 214 biases the movable member 212 toward the X1 side in the X direction. The coil spring 214 is in the form of a coil spring. The coil spring 214 is supported by the movable member 212 on the X1 side in the X direction and by the support bracket 216 on the X2 side in the X direction. The biasing force of the coil spring 214 may be adapted so that the locked state of the parking gear 41 can be maintained under appropriate conditions. For example, the biasing force of the coil spring 214 is adapted so that unintended release (transition of the parking gear 41 from the locked state to the unlocked state) does not occur due to input from external disturbances or the like.

[0033] The support bracket 216 is fixed to the case 3. The case 3 is fixed to the vehicle body. The case 3 may be a case for the entire unit of the parking lock device 1. In other words, the case 3 may support the entire unit of the parking lock device 1 including the electric motor 10. In this embodiment, the support bracket 216 is fixed (fastened) to the case 3 with two bolts BT. Note that the fastening points and the number of fastening points are arbitrary. When fixed to the case 3, the support bracket 216 may be positioned with respect to the electric motor 10 so that the central axis of the rod portion 2120 of the movable member 212 when viewed in the X direction coincides with the central axis of the electric motor 10 (or the central axis of the output member 2100).

[0034] The support bracket 216 supports the movable member 212 in a manner that allows the movable member 212 to move linearly in the X direction. The support bracket 216 may have guide holes 2142 that support the rotating shafts 80, 81 while allowing the rollers 2124, 2126 to move within a predetermined stroke range. For example, the support bracket 216 may be a bracket that supports both Y-direction ends of the rotating shafts 80, 81 and has a side surface (a side surface whose normal direction is the Y direction) with the guide holes 2142. The rotating shafts 80, 81 are supported within the guide holes 2142 in a manner that allows play in the Z direction relative to the guide holes 2142 (see the gap Δ in FIG. 2 ). In other words, the diameters of the rotating shafts 80, 81 are significantly smaller than the dimension of the guide holes 2142 in the Z direction. Therefore, the rotating shafts 80, 81, and therefore the rollers 2124, 2126, are displaceable in the Z direction relative to the support bracket 216.

[0035] In this manner, the support bracket 216 supports the movable member 212 in a manner that allows movement of the movable member 212 in the X direction and displacement of the movable member 212 in the Z direction.

[0036] In this embodiment, the boundary position on the X1 side in the X-direction of the predetermined stroke range of the rollers 2124, 2126 corresponds to the position where the rollers 2124, 2126 are stopped from moving toward the X1 side in the X-direction by the guide hole 2142. In other words, the guide hole 2142 forms the boundary position on the X1 side in the X-direction of the predetermined stroke range of the rollers 2124, 2126. However, in a modified example, another stopper structure may be provided on the support bracket 216. The boundary position on the X2 side in the X-direction of the predetermined stroke range of the rollers 2124, 2126 may also be similar.

[0037] The support bracket 216 supports the coil spring 214. The coil spring 214 expands and contracts in the X direction between the movable member 212 and the support bracket 216, thereby changing the biasing force described above.

[0038] Next, the characteristic configuration of this embodiment will be described with reference to FIGS.

[0039] Fig. 2 is an enlarged view of portion Q2 in Fig. 1. Fig. 3 is an enlarged view of portion Q3 in Fig. 1. Fig. 4 is a cross-sectional view of the portion shown in Fig. 3, and is a cross-sectional view on the XY plane passing through the roller receiving member 219 (cross-sectional view along line CC). Figs. 5 and 6 are cross-sectional views taken along lines AA and BB in Fig. 3, respectively. Fig. 7 is an explanatory diagram of a comparative example, showing the relationship between the case 3 and the support bracket 216' (rolling surface portion 219').

[0040] In this embodiment, the support bracket 216 includes a body member 218 and a roller receiving member 219 .

[0041] The main body member 218 forms a main portion of the support bracket 216. The support bracket 216 is fixed to the case 3 by fastening the main body member 218 to the case 3. Therefore, the main body member 218 is fixed to the case 3. The main body member 218 is also a portion that has the guide hole 2142 described above.

[0042] The roller receiving member 219 is a separate member (separate piece) from the main body member 218 and can abut against the case 3 in the Z direction. In this case, the abutment may be in the form of surface contact between the roller receiving member 219 and the case 3. The roller receiving member 219 overlaps with the rollers 2124, 2126 when viewed in the Z direction. The roller receiving member 219 provides a rolling surface for the roller 2124. That is, the roller receiving member 219 abuts against the roller 2124 in the Z direction on the Z2 side, forming the rolling surface for the roller 2124. The roller receiving member 219 abuts against the case 3 in the Z direction on the Z1 side. Therefore, the roller receiving member 219 can receive a force from the roller 2124 in the Z direction (reaction force from the parking pole 42) and transmit the applied force (see force F1 in FIG. 2, etc.) to the case 3.

[0043] In this embodiment, the roller receiving member 219 is supported by the main body member 218 of the support bracket 216 in a manner that allows it to be displaced in the Z direction relative to the main body member 218.

[0044] Such a support method is arbitrary, but in this embodiment, the roller receiving member 219 is supported on the main body member 218 in a manner such that it is displaceable substantially only in the Z direction. Specifically, as shown in Fig. 4, the roller receiving member 219 has a through hole 2194 through which the extension portion 2184 extends from the main body member 218 of the support bracket 216 to the Z1 side in the Z direction. In this case, the through hole 2194 does not substantially allow displacement of the extension portion 2184 in the X direction and Y direction (it only allows a backlash), but substantially allows displacement of the extension portion 2184 only in the Z direction.

[0045] According to such a support structure, variations in the positional relationship between the support bracket 216 and the case 3 can be absorbed by displacing the roller receiving member 219 relative to the main body member 218 in the Z direction.

[0046] For convenience of explanation, it is assumed here that in the nominal state, the rollers 2124, 2126 are aligned with the center of the guide hole 2142 in the Z direction, and the roller receiving member 219 is in contact with the roller 2124. Furthermore, if the roller receiving member 219 is in contact with the case 3 in this nominal state, the positional relationship between the support bracket 216 and the case 3 is nominal.

[0047] If there is variation in the positional relationship between the support bracket 216 and the case 3, in the nominal state, a gap will be created between the roller receiving member 219 and the case 3, or a negative gap will be created (a state in which the roller receiving member 219 is virtually wedged into the case 3). In either case, in this embodiment, such a gap can be eliminated by displacing the roller receiving member 219 in the Z direction relative to the main body member 218.

[0048] In this embodiment, the support bracket 216 is fastened to the case 3 as a sub-assembly to which the movable member 212 and other components are attached. At this time, variations in the positional relationship (for example, the positional relationship in the Z direction) between the roller 2124 and the case 3 are likely to occur. As a result, a gap may be generated between the roller receiving member 219 and the case 3 in the nominal state. When such a gap is generated, the central axis of the movable member 212 (the central axis of the rod portion 2120) may be misaligned with the central axis (rotation axis) of the electric motor 10 or the central axis of the linear motion mechanism 210.

[0049] In this regard, for example, in a comparative example (see FIG. 7 ) in which the roller receiving member 219 is not provided, if the positional relationship between the rolling surface portion 219′ of the roller 2124 and the case 3 deviates from the desired positional relationship, the above-described reaction force (e.g., reaction force due to ratcheting) is not properly transmitted to the case 3. For example, as shown in FIG. 7 , a gap Δ1 is generated between the rolling surface portion 219′ of the support bracket 216′ and the case 3, preventing proper transmission of force from the rolling surface portion 219′ to the case 3. In this case, measures to increase the strength of the support bracket 216′ are required. Furthermore, if the rolling surface portion 219′ of the roller 2124 is inclined with respect to the nominal orientation due to an assembly error or the like, the sliding resistance between the movable member 212 (roller 2124) and the support bracket 216′ becomes relatively large. In this case, there is an inconvenience of requiring a high output from the electric motor 10 that drives the movable member 212. Furthermore, if the central axis of the movable member 212 (central axis of the rod portion 2120) and the central axis (rotation axis) of the electric motor 10 or the central axis of the linear motion mechanism 210 are misaligned (tilted), the direction of power transmission of the electric motor 10 will be shifted, which will require power including extra component forces, resulting in higher output.

[0050] In contrast, according to this embodiment, the inconveniences that occur in the comparative example can be prevented. That is, as described above, the variation in the positional relationship between the support bracket 216 and the case 3 can be absorbed by displacing the roller receiving member 219 in the Z direction relative to the main body member 218. That is, even when the movable member 212 and the electric motor 10 are aligned and assembled so that their central axes (the central axis of the rod portion 2120) coincide with each other, the roller receiving member 219 can be positioned in an appropriate positional relationship relative to the case 3. As a result, the inconveniences that occur in the comparative example can be prevented.

[0051] For example, assume that in the nominal state described above, there is a gap in the Z direction between the roller receiving member 219 and the case 3. In this case, when the rollers 2124, 2126 receive a reaction force from the parking pawl 42 and are displaced toward the Z1 direction, the roller receiving member 219 is displaced toward the Z1 direction. This eliminates the gap between the roller receiving member 219 and the case 3 in the Z direction, and the roller receiving member 219 comes into contact with the case 3. In other words, when the rollers 2124, 2126 receive a reaction force from the parking pawl 42, a portion of the reaction force can be transmitted to the case 3. Therefore, even when a relatively large reaction force such as a reaction force due to ratcheting is received, the reaction force can be reliably transmitted to the case 3 via the roller receiving member 219.

[0052] In this way, according to this embodiment, while allowing for variations in the positional relationship between the support bracket 216 and the case 3, the reaction force (e.g., reaction force due to ratcheting) that the rollers 2124, 2126 receive from the parking pole 42 can be reliably transmitted to the case 3, and the sliding resistance between the movable member 212 and the support bracket 216 can be maintained relatively small.

[0053] In the above-described nominal state, the gap in the Z direction that can occur between the roller receiving member 219 and the case 3 changes depending on variations in the positional relationship between the main body member 218 of the support bracket 216 and the case 3. Therefore, the maximum possible value of this gap can be used as a reference, and the relationship between the vertical dimension of the guide hole 2142 and the diameter of the pin associated with the rotation shafts 80 and 81 of the rollers 2124 and 2126 (i.e., the gap Δ in FIG. 2) can be adapted. In other words, the larger the gap Δ, the higher the ability to absorb variations, so the gap Δ can be adapted depending on the variations that can occur.

[0054] In this embodiment, the roller receiving member 219 is preferably supported by the main body member 218 of the support bracket 216 via a spring element 240. The spring element 240 may be any type of spring, such as a leaf spring, but in this embodiment, as an example, it is a small coil spring. As shown in FIGS. 2 and 3 , the spring element 240 is disposed between the roller receiving member 219 and the main body member 218 in the Z direction and generates a force (elastic force) in the Z direction. That is, the spring element 240 biases the roller receiving member 219 toward the Z1 side in the Z direction. Note that the spring element 240 is provided around a protrusion 2190 that protrudes from the roller receiving member 219 in the Z direction. In this case, it is possible to prevent the spring element 240 from coming off. In a modified example, a similar protrusion may be provided on the main body member 218 instead of or in addition to the protrusion 2190.

[0055] When such a spring element 240 is provided, the roller receiving member 219 can abut against the case 3 regardless of the positions of the rollers 2124, 2126 in the X direction. That is, even if there is a gap in the Z direction between the roller receiving member 219 and the case 3 in the nominal state described above, the biasing force of the spring element 240 eliminates the gap (the roller receiving member 219 can maintain its abutment state against the case 3). This prevents the roller receiving member 219 from abutting against or separating from the case 3 depending on the positions of the rollers 2124, 2126 in the X direction, thereby preventing inconveniences caused by such movement (for example, deterioration in behavior, abnormal noise, etc.).

[0056] In this embodiment, as described above, the roller receiving member 219 is supported by the main body member 218 of the support bracket 216 in a manner that allows it to be displaced in the Z direction relative to the main body member 218. The roller receiving member 219 is urged toward the Z1 side by the spring element 240 and abuts against the case 3 on the Z1 side. However, before assembly, the roller receiving member 219 does not abut against the case 3 on the Z1 side, so it is useful to prevent the roller receiving member 219 from coming off due to displacement toward the Z1 side (the support bracket 216 coming off the main body member 218).

[0057] Therefore, in this embodiment, a retaining means is provided to prevent the roller receiving member 219 from coming off from the main body member 218 of the support bracket 216. Specifically, as shown in Fig. 6, the extension portion 2184 has a bent portion 21842 at the Z1 side end, and the bent portion 21842 is not included in the through hole 2194 when viewed in the Z direction. In this case, when the roller receiving member 219 rises with respect to the main body member 218 of the support bracket 216, the bent portion 21842 comes into contact with the through hole 2194, preventing further rise (i.e., coming off). As a result, even before assembly, the roller receiving member 219 will not come off from the main body member 218 of the support bracket 216, improving ease of assembly.

[0058] In this embodiment, the roller receiving member 219 is displaceably supported relative to the main body member 218 of the support bracket 216 as described above, but may be supported in other ways. For example, the roller receiving member 219 is displaceably supported relative to the main body member 218 of the support bracket 216 before assembly (in a sub-assembled state of the support bracket 216). However, after the support bracket 216 is assembled to the case 3, the roller receiving member 219 may be fixed to the main body member 218 in a state in which the roller receiving member 219 abuts (is in surface contact with) the case 3. In this case, any fixing method may be used, such as adhesive or welding. For example, a position adjustment mechanism 90 may be used, as in the parking lock device 1A shown in FIGS. 8 and 9. FIGS. 8 and 9 are explanatory diagrams of a position adjustment mechanism 90 provided in a lock mechanism 21A of a parking lock device 1A of another embodiment. FIG. 8 is a side view schematically showing a main portion of the parking lock device 1A, and FIG. 9 is a cross-sectional view taken along line CC in FIG. 8. In this case, the position adjustment mechanism 90 includes a bolt 91 and a nut 92. The bolt 91 is provided so as to penetrate the roller receiving member 219A of the support bracket 216A and the main body member 218A in the Z direction. The nut 92 is screwed onto the bolt 91 from the Z1 side of the main body member 218A. In this case, the gap in the Z direction between the roller receiving member 219A and the main body member 218A can be adjusted by adjusting the amount of tightening of the nut 92. Therefore, even if a gap is formed between the case 3 and the roller receiving member 219A immediately after assembly due to variations in the positional relationship between the support bracket 216A and the case 3, the gap can be eliminated by adjusting the amount of tightening of the nut 92. In other words, the roller receiving member 219A can be brought into abutment (surface contact) with the case 3.

[0059] Although each embodiment has been described in detail above, it is not limited to the specific embodiment, and various modifications and changes are possible within the scope of the claims. It is also possible to combine all or a plurality of components of the above-described embodiments.

[0060] For example, in the embodiment described above, in the locked state, the movable member 212 is held in the locked position by the coil spring 214, but the opposite may also be true: in the unlocked state, the head may be held in the unlocked position (unlocked position in the X direction) by a similar coil spring.

[0061] The following additional notes are made regarding the above-described embodiment.

[0062] [Appendix 1] a case fixed to the vehicle body; An electric motor; a mechanism including a locking member that is releasably engaged with the parking gear, and the locking member is moved based on the output of the electric motor to switch the state of the parking gear between a locked state and an unlocked state; The mechanism comprises: a linear motion mechanism that converts the rotational output of the electric motor into linear motion in a first direction; a movable member that moves linearly in the first direction to move the locking member based on an input in the first direction received from the linear motion mechanism; a support member that supports the movable member; a spring that biases the movable member in the first direction so that the locked state or the unlocked state is maintained, The support member is a main body member fixed to the case, the main body member supporting the movable member in a manner that allows the movable member to move in the first direction and to be displaced in a second direction intersecting the first direction; a contact member that is a separate piece from the main body member and that can contact the case in the second direction; The movable member is a first roller that is movable in the first direction while rotating on the locking member and applies a force in the second direction to the locking member; a second roller that is movable in the first direction while rotating on the abutment member and that applies a reaction force related to the force in the second direction to the case via the abutment member.

[0063] [Appendix 2] 2. The parking lock device according to claim 1, wherein the abutment member is supported by the main body member in a manner that allows it to be displaced in the second direction relative to the main body member.

[0064] [Appendix 3] the abutment member is supported on the body member via a spring element; 3. The parking lock device according to claim 2, wherein the spring element biases the abutment member toward the case.

[0065] [Appendix 4] The parking lock device according to claim 2 or 3, wherein the support member is provided with a means for preventing the abutment member from coming off the main body member in the second direction, that is, in a direction toward the case.

[0066] [Appendix 5] the abutment member is supported relative to the main body member via a position adjustment mechanism, 5. The parking lock device according to claim 1, wherein the position adjustment mechanism is capable of adjusting the position of the abutment member in the second direction relative to the main body member so that the abutment member abuts against the case in the second direction. [Explanation of symbols]

[0067] 1···Parking lock device, 10···Electric motor, 41···Parking gear, 42···Parking pole (locking member), 21···Lock mechanism (mechanism), 210···Linear motion mechanism, 212···Moving member, 2124···Roller (first roller), 2126···Roller (second roller), 214···Coil spring, 216···Support bracket (supporting member), 218, 218A···Main body member, 219, 219A···Roller receiving member (contact member), 240···Spring element, 90···Position adjustment mechanism

Claims

1. a case fixed to the vehicle body; An electric motor; a mechanism including a locking member that is releasably engaged with the parking gear, and the locking member is moved based on the output of the electric motor to switch the state of the parking gear between a locked state and an unlocked state; The mechanism comprises: a linear motion mechanism that converts the rotational output of the electric motor into linear motion in a first direction; a movable member that moves linearly in the first direction to move the locking member based on an input in the first direction received from the linear motion mechanism; a support member that supports the movable member; a spring that biases the movable member in the first direction so that the locked state or the unlocked state is maintained, The support member is a main body member fixed to the case, the main body member supporting the movable member in a manner that allows the movable member to move in the first direction and to be displaced in a second direction intersecting the first direction; a contact member that is a separate piece from the main body member and that can contact the case in the second direction; The movable member is a first roller that is movable in the first direction while rotating on the locking member and applies a force in the second direction to the locking member; a second roller that is movable in the first direction while rotating on the abutment member and that applies a reaction force related to the force in the second direction to the case via the abutment member.

2. The parking lock device according to claim 1 , wherein the abutment member is supported by the main body member in a manner that allows the abutment member to be displaced in the second direction relative to the main body member.

3. the abutment member is supported on the body member via a spring element; The parking lock device according to claim 2 , wherein the spring element biases the abutment member toward the case.

4. 4. The parking lock device according to claim 3, wherein the support member includes a retaining means for preventing the abutting member from coming off the main body member in the second direction, that is, in a direction toward the case.

5. the abutment member is supported relative to the main body member via a position adjustment mechanism, 2. The parking lock device according to claim 1, wherein the position adjustment mechanism is capable of adjusting the position of the abutting member in the second direction relative to the main body member so that the abutting member abuts against the case in the second direction.

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