Parking lock clutch

Abstract

To provide a parking lock clutch capable of enhancing a degree of freedom of rotational position control of a selector with a simple structure, and capable of realizing miniaturization, reduction of manufacturing cost and long service life.SOLUTION: The selector 140 configured to be able to switch the operation mode between the lock mode in which the relative rotation of the outer ring 110 and the inner ring 120 is prohibited and the free mode in which the relative rotation of the outer ring 110 and the inner ring 120 is allowed has the pocket 143 configured to be able to house the roller 130 in the roller housing portion provided in one of the outer ring 110 and the inner ring 120, and the pocket 143 is formed to extend in the circumferential direction so that the selector 140 can further rotate in the unlock direction from the rotation angle position at which the roller 130 is housed in the roller housing portion.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a parking lock clutch that is suitable for use in constructing a parking lock system for a vehicle, for example. [Background technology]

[0002] A known parking lock system for a vehicle is configured to establish a parking lock that prohibits rotation of the output shaft by interposing multiple selectable one-way clutches or multiple two-way clutches between each of multiple transmission gear trains and the input shaft, or between each of multiple transmission gear trains and the output shaft, and by placing two systems of transmission gear trains with different gear ratios in a double mesh state (see, for example, Patent Document 1).

[0003] In the vehicle parking lock system described in Patent Document 1, the operating modes of multiple selectable clutches are controlled to double-engage them in order to establish a parking lock mechanism, which not only requires complex control but also increases the number of parts.

[0004] To address this problem, the present applicant has proposed a roller ratchet type selectable clutch that is suitable for constructing a parking lock system for a vehicle. This selectable clutch is configured to be switchable between a locked mode, which prohibits relative rotation between the outer and inner rings, and a free mode, which allows relative rotation between the outer and inner rings, by rotating a selector within a predetermined angular range. The selector is configured to move the rollers radially by rotating the selector so that in the locked mode, the rollers are supported in roller support grooves provided in one of the outer and inner rings, and in the free mode, the rollers are accommodated in roller accommodating portions provided in the other of the outer and inner rings.

[0005] On the other hand, automatic transmissions have shift ranges including P range, R range, N range, and D range, and the shift ranges can be switched by operating a shift lever located inside the vehicle's cabin. As a method for linking the operation of a shift lever with the switching of gear ranges, a mechanical link mechanism is known in which the operation of the shift lever is transmitted to the automatic transmission by a shift cable (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2022-049749 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-084187 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, in the roller ratchet selectable clutch described above, the rotational angle position of the selector can be controlled only between a lock mode position in which the roller is supported in the roller support groove, and a free mode position in which the roller is accommodated in the roller accommodating portion. Therefore, since the degree of freedom of rotation of the selector is limited, when the selectable clutch is applied to a parking lock system, active electronic control is required. On the other hand, in a configuration in which the shift lever and automatic transmission are connected by a shift cable, the selector cannot be rotated in response to the operation of the shift lever. Therefore, there is a problem in that the above-mentioned selectable clutch cannot be applied to a configuration in which the operation of the shift lever and the switching of the gear range are connected by a mechanical link mechanism.

[0008] The present invention has been made in light of the above circumstances, and aims to provide a parking lock clutch that has a simple structure, is capable of increasing the degree of freedom in controlling the rotational position of a selector, and is capable of being made smaller, having reduced manufacturing costs, and having a longer life. [Means for solving the problem]

[0009] The present invention provides a parking lock clutch comprising an outer ring and an inner ring that are coaxially arranged so as to be rotatable relative to each other, a plurality of rollers arranged between the outer ring and the inner ring, a biasing member that radially biases the rollers toward a roller accommodating portion provided on one of the outer ring and the inner ring, and a selector that is arranged so as to be rotatable independently of the outer ring and the inner ring, wherein the selector clamps the rollers in the circumferential direction between the roller accommodating portion and a roller support groove provided on the other of the outer ring and the inner ring, thereby supporting the load acting on the rollers with the selector, thereby allowing the rollers to be biased relative to each other. The problem is solved by configuring the operating mode to be switchable between a locked mode that prohibits relative rotation of the inner ring and a free mode that allows relative rotation of the outer ring and the inner ring by accommodating the roller in the roller accommodating section, the selector having a pocket formed so that the roller can be accommodated in the roller accommodating section when the operating mode is switched to the free mode, and forming the pocket to extend circumferentially so that the selector can rotate further in the unlocking direction from the rotational angle position at which the selector accommodates the roller in the roller accommodating section. [Effects of the Invention]

[0010] According to the invention of claim 1, the operating mode can be switched between lock mode and free mode by a simple switching operation of controlling the position of the roller by rotating the selector, so that parking lock can be realized with a simple configuration without requiring complex control. Furthermore, by providing a biasing member to bias the roller toward the roller accommodating portion, and by configuring the selector to receive the load acting on the roller toward the roller accommodating portion when the roller is sandwiched between the roller support groove and the roller accommodating portion, thereby prohibiting relative rotation of the outer and inner rings, it is possible to easily rotate the selector with a small force (release force) even if torque remains when switching the operating mode from locked to free mode. This prevents damage to the roller, outer and inner rings, and enables a longer lifespan, and when a drive source such as an actuator is used to rotate the selector, the drive source itself can be made smaller, allowing for a smaller parking lock clutch and reduced manufacturing costs. Furthermore, by having a pocket formed so that the selector can rotate further in the unlocking direction from the rotational angle position where the roller is accommodated in the roller accommodating section, the movable range of the selector can be expanded, and the degree of freedom in controlling the rotational position of the selector can be increased.

[0011] According to the invention of claim 2, the degree of freedom in controlling the rotational position of the selector can be further improved, and it can also be applied, for example, to a mechanism in which shift operation by a shift lever is transmitted to a transmission by a shift cable.

[0012] According to the invention of claim 3, when the selector is rotated in the locking direction, the roller housed in the roller housing section can be easily moved radially toward the roller support groove due to the action of the inclined surface of the pocket, making it possible to easily switch from free mode to locking mode and to achieve reliable locking.

[0013] According to the invention of claim 4, when the operating mode is switched from free mode to locked mode, if the phases of the roller housing portion and the roller support groove are not aligned, the standby spring is compressed to prevent the selector from rotating, so the lock standby state can be maintained, and as soon as the phases of the roller housing portion and the roller support groove are aligned, the biasing force of the standby spring is released, allowing the selector to rotate and become locked. This reliably prevents chipping or damage caused by impact due to sudden engagement, making it possible to extend the life and ensure high safety.

[0014] According to the invention of claim 5, the selector can be controlled in response to the operation of the shift cable, so that the gear range of the transmission can be covered, including P range, R range, N range, D range, and L range, enabling smooth switching operations. Also, by appropriately changing the attachment position of the shift cable relative to the selector, it is possible to easily adjust the cable operating range on the vehicle side. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view showing a configuration of a parking lock clutch according to an embodiment of the present invention. [Figure 2] 2 is a plan view showing the parking lock clutch shown in FIG. 1 with a portion thereof omitted, as viewed from one axial end side. FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 2 is a perspective view showing the configuration of an outer ring in the parking lock clutch shown in FIG. [Figure 5] FIG. 2 is a perspective view showing the configuration of a selector in the parking lock clutch shown in FIG. [Figure 6] FIG. 2 is a schematic diagram showing a state in which the outer ring and the inner ring are meshed with each other. [Figure 7]10 is a plan view seen from one axial end side, showing a portion of the parking lock clutch with the selector positioned at the second position and the operation mode set to the free mode. FIG. [Figure 8] FIG. 10 is a plan view seen from one axial end side, with a portion of the parking lock clutch omitted, when the selector is positioned at a third position in a state where the operation mode is the free mode. [Figure 9] 2 is a plan view seen from one axial end side, showing the parking lock clutch shown in FIG. 1 with a portion thereof omitted when the parking lock clutch is in a lock standby state. FIG. [Figure 10] FIG. 1 is a schematic diagram illustrating an example of the configuration of a parking lock system. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A parking lock clutch according to an embodiment of the present invention will now be described with reference to the drawings.

[0017] 1 to 3, the parking lock clutch 100 according to this embodiment includes an outer ring 110, an inner ring 120, a plurality of rollers 130, a biasing member 135, a selector 140, a selector drive mechanism 150, and a retaining plate 160. C in FIGS. 1 to 3 denotes the rotation axis.

[0018] The outer ring 110 and the inner ring 120 are arranged coaxially and rotatably relative to each other so that the inner surface of the outer ring 110 and the outer surface of the inner ring 120 are close to and face each other, and in this embodiment, the outer ring 110 is fixed and the inner ring 120 is rotated.

[0019] As shown in FIG. 4, the outer ring 110 has an annular plate-shaped base portion 111 and a cylindrical portion 115 provided so as to extend from the inner peripheral edge on one surface of the base portion 111 toward one end in the axial direction. At positions arranged at predetermined intervals around the circumference of the inner tube portion 115, notches are provided extending axially from one axial end edge so as to form step portions 113 in the base portion 111, thereby forming a plurality of roller accommodating portions 117 corresponding to each of the plurality of rollers 130 so as to be able to accommodate the rollers 130. Mounting portions 112 are provided on the outer peripheral surface of the base portion 111 at positions aligned at predetermined intervals in the circumferential direction, and are adapted to be fixed to an object to be mounted with, for example, a fixing bolt B (see FIG. 1). An annular step 116 is formed on the inner peripheral edge of one end of the cylindrical portion 115, and the biasing member 135 is positioned in this step when the roller 130 is housed in the roller housing portion 117.

[0020] The inner ring 120 is configured by forming a plurality of roller support grooves 121 axially extending at predetermined intervals in the circumferential direction on the outer peripheral surface of a cylindrical base material, which are capable of receiving and supporting part of the circumferential surface of the rollers 130 .

[0021] The roller support groove 121 is configured as a recessed groove having a substantially flat bottom wall and peripheral walls with a circular arc cross section that continue on both sides of the bottom wall (see FIG. 6). In this embodiment, the opening edge of the roller support groove 121 is C-chamfered, so that even if the roller 130 attempts to move toward the roller support groove 121 due to an erroneous operation or malfunction of the selector 140 while the inner ring 120 is rotating at a certain rotational speed or above, the roller 130 is repelled toward the roller accommodating portion 117 by the chamfered portion. This prevents the outer ring 110 and the inner ring 120 from engaging with each other, ensuring high safety. The opening edge of the roller support groove 121 may also be R-chamfered, for example. In this embodiment, for example, four rollers 130 are arranged at positions spaced apart in the circumferential direction, but the number of roller support grooves 121 formed is greater than the number of rollers 130. Here, the number of rollers 130 is not particularly limited, and the rollers do not need to be arranged at equal intervals.

[0022] As shown in FIG. 3, each of the rollers 130 is configured to protrude axially outward from one end face of the inner ring 120 when supported by the roller support groove 121, and a biasing member mounting groove 131 is formed on the circumferential surface of the protruding portion, extending around the entire circumference. Each of the rollers 130 is restricted from moving toward the other end in the axial direction by a step 113 formed on the base portion 111 of the outer ring 110 .

[0023] In this embodiment, the biasing member 135 is common to each of the rollers 130 and is formed of, for example, an annular spring. The biasing members 135 are attached to the biasing member attachment grooves 131 of the rollers 130 from the radially inner side so as to bias the rollers 130 radially outward toward the roller accommodating portions 117 .

[0024] The selector 140 is arranged coaxially with the outer ring 110 and the inner ring 120 so as to be rotatable relative to the outer ring 110 in front of and behind the outer ring 110 in the axial direction, in which the roller accommodating portion 117 is formed. As shown in Figure 5, the selector 140 has a circular plate-shaped main body 141 and is configured so that the roller 130 can be pressed by the inner surface of the main body 141 so that the roller 130 is supported in the roller support groove 121 in a lock mode in which relative rotation between the outer ring 110 and the inner ring 120 is prohibited.

[0025] A pocket 143 is formed on the inner surface of the main body 141 so that the roller 130 can be accommodated in the roller accommodating section 117 when the selector 140 is rotated in the unlocking direction (for example, clockwise in Figure 2) to switch to a free mode that allows relative rotation of the outer ring 110 and the inner ring 120.

[0026] The pocket 143 is configured as a recess formed to extend in the circumferential direction so that the selector 140 can rotate further in the unlocking direction of the selector 140 from the rotation angle position where the roller 130 is accommodated in the roller accommodating portion 117. This makes it possible to expand the movable range of the selector 140, and to increase the degree of freedom in controlling the rotational position of the selector 140.

[0027] Pocket 143 is configured to be able to switch the rotational angle position of selector 140 in multiple stages. This makes it possible to control the rotational position of selector 140 at a first position, which is a rotational angle position where the operation mode of parking lock clutch 100 is set to lock mode, a second position, which is a rotational angle position where roller 130 is accommodated in roller accommodating portion 117 and the operation mode of parking lock clutch 100 is set to free mode, a third position where roller 130 is positioned at the end of pocket 143 on the unlocking direction side, and any rotational angle position between the second and third positions.

[0028] The wall surface of the pocket 143 on the locking direction side forms an inclined surface 144 that slopes radially outward in the unlocking direction, and by rotating the selector 140 in the locking direction, the roller 130 housed in the roller housing portion 117 can be easily moved radially toward the roller support groove 121 by the action of the inclined surface 144 of the pocket 143. This makes it possible to easily switch from the free mode to the locked mode and to achieve reliable locking.

[0029] In addition, a pair of locking direction rotation restricting protrusions 142a are formed on the outer peripheral surface of the main body 141 at positions facing each other across the rotation axis C, and a pair of unlocking direction rotation restricting protrusions 142b are formed at positions facing each other across the rotation axis C.

[0030] The selector 140 includes a selector arm 145 connected to the selector drive mechanism 150. In this embodiment, the selector arm 145 is configured as a plate-like body extending along a plane parallel to the rotation axis C, and is provided, for example, at a position between the locking direction rotation restricting protrusion 142a and the unlocking direction rotation restricting protrusion 142b in the circumferential direction. The selector arm 145 is configured such that one end is U-shaped, with a notch 146 formed at one axial end thereof, into which a drive rod 151 (described later) can be inserted.

[0031] 2, the selector drive mechanism 150 includes a drive rod 151, one end of which is connected to the selector arm 145 and which is reciprocable in one direction (left and right in FIG. 2) so as to be able to position the selector 140 within a range between the first position and the third position, and a standby spring 155 which is arranged so as to be elastically deformable in the compression direction when the drive rod 151 is moved so as to rotate the selector 140 in the unlocking direction. In this embodiment, the standby spring 155 is made of a coil spring and is provided with the drive rod 151 inserted therethrough.

[0032] The drive rod 151 is provided with a pair of retaining rings 153a, 153b that sandwich the selector arm 145, and one retaining ring 153a is engaged with a tip-end engaging portion 152a of the drive rod 151, while the other retaining ring 153b is pressed against the selector arm 145 by a standby spring 155, thereby connecting the drive rod 151 to the selector arm 145. The other end of the standby spring 155 is engaged with a base-end engaging portion 152b of the drive rod 151.

[0033] The retaining plate 160 is in the shape of an annular plate, and as shown in Figure 1, is positioned coaxially with the outer ring 110 and the inner ring 120 at one axial end of the selector 140, and is fixed to the mounting portion 112 of the outer ring 110 by a pin member 162. This prevents the components of the parking lock clutch 100 from coming apart in the axial direction. As shown in Figure 3, the retaining plate 160 is disposed so as to cover the roller support groove 121, and also functions to prevent the roller 130 from coming off. As shown in FIG. 1, a notch 161 is formed on the outer peripheral surface of the holding plate 160 so as to extend in the circumferential direction, and the selector arm 145 is positioned in the notch 161 .

[0034] The pin member 162 is provided at a position where it can engage with the locking direction rotation restricting protrusion 142a and the unlocking direction rotation restricting protrusion 142b of the selector 140. Therefore, the movable range of the selector 140 is restricted by the locking direction rotation restricting protrusion 142a or the unlocking direction rotation restricting protrusion 142b engaging with the pin member 162. This makes it possible to prevent overrunning of the selector 140, and ensures that switching between the free mode and the locked mode can be performed reliably.

[0035] In the parking lock clutch 100, when viewed from one axial end, the locking direction rotation restricting protrusion 142a is positioned in the first position where it engages with the pin member 162, as shown in Figures 1 to 3, the roller 130 is pressed by the inner peripheral surface of the selector 140 against the biasing force of the biasing member 135 and is supported in the roller support groove 121 of the inner ring 120. In other words, the operating mode of the parking lock clutch 100 is a lock mode in which relative rotation between the outer ring 110 and the inner ring 120 is prohibited.

[0036] In the lock mode, as shown in Fig. 6, when a rotational torque is input to the inner ring 120, the roller 130 is sandwiched between the roller support groove 121 and the roller accommodating portion 117 of the outer ring 110, regardless of the rotational direction of the inner ring 120, and further, the load acting at this time in a direction that moves the roller 130 toward the roller accommodating portion 117 is supported by the selector 140, thereby meshing the outer ring 110 and the inner ring 120. Fig. 6 shows the state when the inner ring 120 is rotated in the lock direction (counterclockwise).

[0037] When the selector 140 is rotated in the unlocking direction (clockwise in FIG. 2) and positioned at the second position, as shown in FIG. 7, the load acting on the roller 130 in the direction toward the roller accommodating portion 117 and the biasing force of the biasing member 135 move the roller 130 radially outward and place it in the roller accommodating portion 117 of the outer ring 110. In other words, the operating mode of the parking lock clutch 100 is switched to a free mode in which relative rotation between the outer ring 110 and the inner ring 120 is permitted.

[0038] Thus, in the parking lock clutch 100 described above, the selector 140 can be rotated further in the unlocking direction from the second position, and the rotation of the selector 140 is restricted by the engagement of the unlocking direction rotation restricting protrusion 142b with the pin member 162. Figure 8 shows the state in which the selector 140 has been rotated to the third position, which is the limit position in the unlocking direction.

[0039] On the other hand, when the selector 140 is rotated in the lock direction to the second position to switch the operating mode of the parking clutch 100 from the free mode to the lock mode, if the phases of the roller accommodating portion 117 of the outer ring 110 and the roller support groove 121 of the inner ring 120 are not aligned, as shown in Figure 9, rotation of the selector 140 is prevented, while the drive rod 151 is moved and the standby spring 155 is compressed. At this time, the parking lock clutch 100 is in a lock standby state. As a result, when the inner ring 120 is rotating at a certain rotational speed or above, chipping or damage due to impact caused by sudden meshing between the outer ring 110 and the inner ring 120 can be reliably prevented, making it possible to extend the life of the clutch and ensure high safety. Then, when the phases of roller accommodating portion 117 and roller support groove 121 are aligned, the biasing force of standby spring 155 is released, causing selector 140 to rotate in the lock direction to be positioned at the first position. As a result, roller 130 moves radially toward roller support groove 121 due to the action of inclined surface 144 of pocket 143, and the operating mode of parking lock clutch 100 changes to the lock mode. At this time, the movable range of selector 140 is restricted, making it possible to prevent overrunning of selector 140 and ensuring switching between free mode and lock mode.

[0040] Thus, the parking lock clutch 100 described above has pocket 143 formed so that selector 140 can rotate further in the unlocking direction from the second position, which is the rotational angle position where selector 140 accommodates roller 130 in roller accommodating portion 117, thereby expanding the movable range of selector 140 and increasing the degree of freedom in controlling the rotational position of selector 140. Therefore, for example, by applying this to a mechanism in which shift operation by a shift lever is transmitted to a transmission by a shift cable, it becomes extremely useful in constructing a parking lock system.

[0041] FIG. 10 is a schematic diagram illustrating an example of the configuration of a parking lock system. In this parking lock system, the inner ring 120 of the parking lock clutch 100 is connected to one of the input shaft, output shaft, or intermediate shaft of an automatic transmission 170, and the drive rod 151 of the selector drive mechanism 150 is connected to a shift lever 175 disposed inside the vehicle cabin by a shift cable 176. The automatic transmission 170 has set gear ranges including P range, R range, N range, D range, and L range, and the gear range can be changed by operating the shift lever 175.

[0042] In this parking lock system, the connection state of the shift cable 176 is adjusted so that when the shift lever 175 is positioned in the P range, the selector 140 is positioned in the first position, which sets the operating mode of the parking lock clutch 100 to the lock mode. Therefore, when the shift lever 175 is positioned in the P range, the parking lock is engaged, making it possible to reliably prevent the vehicle from moving unintentionally.

[0043] In this parking lock system, the rotational angle position of selector 140 is controlled in response to the operation of shift lever 175, and when shift lever 175 is positioned in any of the R, N, D, and L ranges, the operation mode of parking lock clutch 100 is set to the free mode. Specifically, when shift lever 175 is positioned in R range, selector 140 is positioned in the second position, when shift lever 175 is positioned in L range, selector 140 is positioned in the third position, and when shift lever 175 is positioned in N or D range, selector 140 is positioned at a rotational angle position between the second and third positions. When shift lever 175 is positioned in any of the R, D, and L ranges, the vehicle can be started smoothly from a stopped state, and when shift lever 175 is positioned in N range, engine power is not transmitted to the wheels.

[0044] Thus, the parking lock clutch 100 can control the selector 140 in response to the operation of the shift lever 175, and can cover the shift ranges including the P range, R range, N range, D range, and L range of the automatic transmission 170. Therefore, a parking lock system using this parking lock clutch 100 can smoothly switch the shift range, and can effectively realize parking lock.

[0045] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design modifications can be made without departing from the present invention as set forth in the claims. For example, in the above embodiment, a configuration was described in which a roller support groove was formed on the outer peripheral surface of the inner ring, a roller accommodating portion was formed on the inner peripheral surface of the outer ring, and a biasing member was arranged to bias the roller radially outward, but a configuration in which a roller support groove was formed on the inner peripheral surface of the outer ring, and a roller accommodating portion was formed on the outer peripheral surface of the inner ring may also be used. [Explanation of symbols]

[0046] 100 ··· Parking clutch 110 Outer ring 111 Base part 112 Mounting part 113 ··· Stepped section 115 ··· Cylindrical part 116 Annular step 117 Roller housing 120 ··· Inner circle 121 Roller support groove 130 ··· Laura 131... Urging member mounting groove 135 ··· Biasing member 140 ··· Selector 141 Main body 142a Locking direction rotation restriction protrusion 142b ··· Unlock direction rotation restriction protrusion 143 ··· Pocket 144... Slope 145 ··· Selector arm 146 Notch 150 ··· Selector drive mechanism 151 Drive rod 152a... Tip side engaging part 152b...Proximal side engaging part 153a ··· Retaining ring 153b Retaining ring 155 ··· Standby spring 160... Holding plate 161 Notch 162 Pin member 170 Automatic transmission 175 ··· Shift lever 176 ··· Shift cable B Fixing bolt C...Rotation axis center

Claims

1. A parking lock clutch comprising an outer ring and an inner ring that are coaxially arranged so as to be rotatable relative to each other, a plurality of rollers arranged between the outer ring and the inner ring, a biasing member that biases the rollers in a radial direction toward a roller accommodating portion that is provided in one of the outer ring and the inner ring, and a selector that is arranged so as to be rotatable independently of the outer ring and the inner ring, the selector is configured to sandwich the roller in the circumferential direction between the roller accommodating portion and a roller support groove provided in the other of the outer ring and the inner ring, thereby supporting a load acting on the roller with the selector, thereby switching an operation mode between a lock mode in which relative rotation between the outer ring and the inner ring is prohibited, and a free mode in which relative rotation between the outer ring and the inner ring is permitted by accommodating the roller in the roller accommodating portion; the selector has a pocket formed so that the roller can be accommodated in the roller accommodating portion when the operation mode is switched to a free mode, a pocket formed to extend circumferentially so that the selector can further rotate in an unlocking direction from a rotational angle position at which the roller is accommodated in the roller accommodating portion.

2. 2. The parking lock clutch according to claim 1, wherein the pocket is configured so that the rotational angle position of the selector can be switched in multiple stages.

3. the pocket is a recess formed on an inner or outer peripheral surface of the selector, 2. The parking lock clutch according to claim 1, wherein a wall surface of the recess on the locking direction side is an inclined surface configured to guide the roller into the roller support groove when the selector is rotated in the locking direction.

4. a selector drive mechanism that rotationally drives the selector, 2. The parking lock clutch according to claim 1, wherein the selector drive mechanism comprises a drive rod connected to the selector and capable of reciprocating in one direction, and a standby spring provided so as to be elastically deformable in a compression direction when the selector is rotated in the locking direction.

5. the selector is configured to be connectable to a shift cable for mechanically connecting a shift lever and a transmission in a vehicle; When the shift lever is positioned in the P range, the selector is positioned in a first position that sets the operation mode of the parking lock clutch to a lock mode, 2. The parking lock clutch according to claim 1, wherein the rotational angular position of the selector is controlled in accordance with the operation of the shift lever.

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