JP2006322490A - Electric parking lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric parking lock device capable of obtaining accurate synchronization of detent operation by a detent mechanism and amount of travel of a rod shaft without adjusting a stop position of the rod shaft accurately when engaging/disengaging a parking pole with/from a parking gear. <P>SOLUTION: In detent operation in parking lock by the detent mechanism 7, driving of an electric motor 9 is stopped when a roller pin 32 crosses a top part of a detent convex curved face 34c and is positioned in this side by a predetermined section more than a bottom part of a first detent recessed part 34a, and then the roller pin 32 is moved to a bottom part of the first detent recessed part 34a by energizing force by an energizing spring 35. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric parking lock device that locks a parking gear by engaging a parking pawl by driving an electric drive source when stopped (parking).

  As a parking lock device that engages and locks a parking pawl to a parking gear provided on the output shaft of a mission when stopping (parking), an electric parking lock device that uses an electric actuator to engage the parking pawl with a parking gear has been proposed. (For example, refer to Patent Document 1).

In the electric parking lock device of Patent Document 1, when the selector switch (shift lever) is operated to P (parking), the parking pole is engaged with the parking gear by driving the motor, and when the P (parking) is released, the motor is locked. Is rotated in the opposite direction to the operation of P (parking), and the parking pole is separated from the parking gear.
Japanese Patent No. 3053384 (paragraphs [0019] to [0022], FIGS. 1 to 4)

  By the way, in the electric parking lock device as in Patent Document 1, there is a case where a detent mechanism that generates a detent load corresponding to when the parking pawl is engaged and disengaged with respect to the parking gear may be provided. It is necessary to accurately synchronize the detent operation by the detent mechanism and the movement amount (stroke) of the rod (rod shaft) that moves by driving the motor on the electric actuator side. Because, when engaging or disengaging the parking pole with respect to the parking gear, if the electric actuator stops driving, the detent mechanism side does not move from the rod shaft, and the roller pin of the detent mechanism does not always stop at the bottom of the detent recess. Because. Therefore, the position where the rod shaft stop switch is turned ON / OFF or the length of the transmission member such as the cable connecting the rod shaft and the detent mechanism is accurately adjusted so that the rod shaft stop position is accurate. It takes time and effort.

  Therefore, the present invention provides a detent mechanism and a movement of the rod shaft without accurately adjusting the stop position of the rod shaft or the length of the transmission member when the parking pole is engaged or disengaged with respect to the parking gear. It is an object of the present invention to provide an electric parking lock device capable of obtaining accurate synchronization with an amount (stroke).

  In order to achieve the above object, the present invention provides an electric drive source that generates a driving force for engaging and disengaging a parking pole with respect to a parking gear according to an output of a parking command means, and an output shaft of the electric drive source. A ball screw member loosely fitted in the formed screw groove and capable of converting the rotational motion of the output shaft by driving of the electric drive source into linear motion; and a linearly reciprocating rod shaft installed parallel to the output shaft; A linear motion transmission mechanism provided between the ball screw member and the rod shaft, and operable to engage or disengage the parking pole with respect to the parking gear according to a linear movement of the rod shaft. A parking pole operating means, and when the parking pole is engaged or disengaged with respect to the parking gear by the operation of the parking pole operating means. A detent mechanism that generates a detent load in response, and a transmission member that transmits linear movement of the rod shaft to the parking pole actuating means and the detent mechanism, and rotation of the output shaft by driving of the electric drive source The motion is converted into a linear motion by the ball screw member, the converted linear motion is transmitted to the rod shaft through the linear motion transmission mechanism, and the parking pole actuating means is moved to the transmission member by linear movement of the rod shaft. An electric parking lock device that operates the detent mechanism via the transmission member, wherein the detent mechanism includes a roller pin provided on a swingable arm member, and a parking pole operating means. A detent arm that can rotate in response to the operation, and the roller pin to the detent An operation for urging the parking pawl to come into contact with the front peripheral surface of the belt, and an operation for engaging the parking pawl with the parking gear by the operation of the parking pawl operating means formed on the front peripheral surface of the detent arm. Accordingly, the first detent recess that engages with the roller pin, the detent convex surface that is continuous with the first detent recess, and the parking pole that is continuous with the detent convex surface by the operation of the parking pole actuating means from the parking gear. A second detent recess that engages with the roller pin in accordance with the disengagement operation, and by rotating the detent arm corresponding to the operation of the parking pole actuating means by driving the electric drive source, The roller pin is passed through the surface of the detent convex curved surface from the first detent recess. When the roller pin is engaged with the first detent concave surface from the second detent concave portion through the surface of the detent convex curved surface when the roller pin is engaged with the first detent concave surface. Beyond the second detent recess or the bottom of the first detent recess, the drive of the electric drive source is stopped when it is positioned before a predetermined section, and then the biasing force by the biasing means The roller pin is moved to the second detent recess or the bottom of the first detent recess.

  According to the present invention, the drive of the electric drive source is stopped when the roller pin is positioned in front of the second detent recess or the bottom of the first detent recess beyond the top of the detent convex curved surface, and thereafter When the parking pole is engaged or disengaged by moving the roller pin to the second detent recess or the bottom of the first detent recess by the biasing force of the biasing means, the stop position or transmission of the rod shaft Accurate synchronization between the detent operation by the detent mechanism and the movement amount (stroke) of the rod shaft can be obtained without accurately adjusting the length of the member.

  According to the present invention, when the parking pole is engaged or disengaged with respect to the parking gear, the detent operation by the detent mechanism and the rod shaft can be adjusted without accurately adjusting the stop position of the rod shaft or the length of the transmission member. Since accurate synchronization with the movement amount (stroke) can be obtained, there is no need for fine adjustment of the stop position of the rod shaft or fine adjustment of the length of the transmission member between the rod shaft and the detent mechanism. It is possible to omit the mechanism for fine adjustment.

  Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 is a schematic configuration diagram showing an electric parking lock device according to an embodiment of the present invention.

<Configuration of electric parking lock device>
As shown in FIG. 1, an electric parking lock device 1 according to this embodiment includes a parking pole 5 that is detachably engaged with an electric actuator 2 and a parking gear 4 attached to an output shaft 3 of a mission (not shown). A parking pole actuating mechanism 6 that engages and disengages the pawl portion 5a of the parking pole 5 with respect to the tooth groove 4a of the parking gear 4, and a pawl portion 5a of the parking pole 5 with respect to the tooth groove 4a of the parking gear 4. And a detent mechanism 7 that generates a detent load when engaged (when parking is locked) and when released (when parking lock is released).

  The electric actuator 2 includes an electric motor 9 as an electric drive source attached to the casing 8, an output shaft 9a of the electric motor 9 having a thread groove 9b on the peripheral surface, and a movement provided in parallel to the axial direction of the output shaft 9a. The rod shaft 10, the ball screw member 11 installed around the screw groove 9 b of the output shaft 9, the concave portion 12 integrally formed on the upper surface side of the ball screw member 11, and the base end 13 a are connected to the rod shaft 10. A connecting arm 13 is provided which is fixed to the intermediate portion and arranged so that a lower projection (not shown) of the tip end portion 13b is positioned in the concave portion 12. In the present embodiment, the concave portion 12 and the connecting arm 13 constitute a linear motion transmission mechanism.

  The rotation (forward / reverse rotation) control and stop control of the electric motor 9 are performed by a signal from a transmission ECU (hereinafter referred to as ECU) 14 as a parking command means. A shift device 16 having a shift lever 15 is electrically connected to the ECU 14. By operating the shift lever 15, for example, P (parking), R (reverse), N (neutral), D (drive) Corresponding to the position, the mission (not shown) side can be switched to P, R, N, D. The shift device 16 is provided, for example, on the floor between the driver's seat and the passenger seat in the passenger compartment. The front end side of the output shaft 9 a of the electric motor 9 is rotatably supported by a bearing portion 17 attached to the casing 8.

  The rod shaft 10 is movably inserted and supported by two rod shaft holding members 18a and 18b attached to both ends of the casing 8. A known push-pull cable 20 provided with a manual operation lever 19 at the tip is connected to the right tip (right side in FIG. 1) 10a of the rod shaft 10, and the left tip (see FIG. 1) of the rod shaft 10. The parking pole operating arm 28 of the parking pole operating mechanism 6 to be described later is connected to the left side 10b through a known push-pull cable 21.

  As shown in FIG. 2, the ball screw member 11 is loosely fitted on the outer periphery of a screw groove 9b formed on the surface of the output shaft 9a of the electric motor 9, and has a screw groove having the same pitch as the screw groove 9b of the output shaft 9a. A nut 22 having 22a, and a plurality of steel balls 23 rotatably disposed between the thread groove 9b of the output shaft 9a and the thread groove 22a of the nut 22 are provided. The plurality of steel balls 23 are substantially in contact with each other so as to be rotatable along a spiral track formed between the screw groove 9b of the output shaft 9a and the screw groove 22a of the nut 22, and when the output shaft 9a rotates, It circulates while rotating through the formed circulation path (not shown). Thereby, when the output shaft 9a rotates, the ball screw member 11 having the nut 22 linearly moves along the axial direction of the output shaft 9a. Further, the concave portion 12 is integrally formed on the upper surface of the nut 22.

  Further, in the present embodiment, the projecting lower portion (not shown) of the distal end portion 13b of the connecting arm 13 connected to the rod shaft 10 is positioned in the concave portion 12 formed on the upper surface side of the ball screw member 11 (nut 22). Therefore, for example, when the ball screw member 11 moves linearly in the right direction in FIG. 1 due to the forward rotation of the output shaft 9 a by driving the electric motor 9, the lower end of the connecting arm 13 is one wall surface 12 a of the concave portion 12. By being pushed in contact with each other, the connecting rod 13 is linearly moved in the right direction and the connected rod shaft 10 is linearly moved in the right direction (during the normal parking lock shown in FIG. 1). On the other hand, when the ball screw member 11 moves linearly in the left direction in FIG. 1 due to the reverse rotation of the output shaft 9 a driven by the electric motor 9, the projecting lower portion of the distal end portion 13 b of the connecting arm 13 is brought into contact with the other wall surface 12 b of the concave portion 12. When pressed in contact with each other, the rod shaft 10 connected in accordance with the linear movement of the connecting arm 13 in the left direction moves linearly in the left direction (when the normal parking lock is released).

  When the electric motor 9 is not energized, the ball screw member 11 has a plurality of rotatable plural members arranged on a spiral track formed between the screw groove 9b of the output shaft 9a and the screw groove 22a of the nut 22. When the steel ball 23 is circulated through a circulation path (not shown), it can smoothly move linearly along the axial direction of the output shaft 9a while rotating the output shaft 9a.

  On the upper side of the parking pole 5, there are claw portions 5 a that can be engaged with a plurality of tooth grooves 4 a formed on the peripheral surface of the parking gear 4, and the lower side of the parking pole 5 is connected to the rotating shaft 24. It is supported rotatably. Further, the parking pole 5 is biased around the rotation shaft 24 to bias the parking pole 5 in the right direction in FIG. 1 (the direction in which the pawl portion 5a of the parking pole 5 is detached from the tooth groove 4a of the parking gear 4). A spring 25 is provided. One end of the biasing spring 25 is locked in a locking hole 5 b formed in the parking pole 5, and the other end is locked in a spring locking member 26.

  The parking pole actuating mechanism 6 includes a parking pole actuating arm 28 which is rotatably provided on a rotating shaft 27 and is connected to the other end side of the push-pull cable 21, and a front end side opposite to the claw portion 5 a of the parking pole 5. A parking gear pressing arm 30 having a pressing roller 29 that can freely come into contact with the side surface 5b. The parking pole operating arm 28 and the parking gear pressing arm 30 rotate integrally around a rotation shaft 27. .

  In the detent mechanism 7, the base end side is swingably supported by the swing shaft 31, the roller arm 33 provided with the roller pin 32 on the distal end side of the intermediate portion, and the base end side is rotatably supported by the rotating shaft 27. And a detent arm 34 with which the roller pin 32 contacts the peripheral surface of the tip, and a biasing spring 35 for biasing the tip side (roller pin 32 side) of the roller arm 33 toward the rotating shaft 27 of the detent arm 34. Yes. One end side of the biasing spring 35 is locked to the tip of the roller arm 33 (the tip side from the position of the roller pin 32), and the other end is locked around the rotation shaft 27. Further, the detent arm 34 rotates integrally with the rotation of the parking pole operating arm 28 and the parking gear pressing arm 30 around the rotation shaft 27.

  The detent arm 34 has a first detent on which the roller pin 32 is engaged with the front peripheral surface of the detent arm 34 when the pawl portion 5a of the parking pole 5 is engaged with the tooth groove 4a of the parking gear 4 (see FIG. 1). There is a recess 34a, and a second detent recess 34b with which the roller pin 32 engages when the parking lock is released (see FIG. 4) when the pawl 5a of the parking pole 5 is detached from the tooth groove 4a of the parking gear 4. A smooth detent convex curved surface 34c is formed between the first detent recess 34a and the second detent recess 34b.

  Next, a normal parking lock operation by the electric parking lock device 1 will be described with reference to FIGS. 1 shows a parking lock state, and FIG. 4 shows a parking lock release state.

<Parking lock operation>
As shown in FIG. 1, when the vehicle (not shown) is stopped (parked), the driver operates the operation lever 15 at the position P (parking) of the shift device 16 so that the parking lock signal is transmitted to the ECU 14. Is output. The ECU 14 outputs a drive signal to the electric motor 9 of the electric actuator 2 based on the input of the parking lock signal, and drives the electric motor 9 to rotate. When the operation lever 15 of the shift device 16 is operated to a position other than P, as shown in FIG. 4, the electric parking lock device 1 is in an inoperative state, and the pawl portion 5a of the parking pole 5 It is detached from the tooth groove 4a of the gear 4.

  When the output shaft 9 a rotates (forward rotation) by driving the electric motor 9, the ball is screwed between the thread groove 9 b of the output shaft 9 a and the thread groove 22 a of the nut 22 via a plurality of steel balls 23. The screw member 11 linearly moves from the left side of FIG. 1 to the right side along the axial direction of the output shaft 9a to a predetermined position (FIG. 1 shows the state where the ball screw member 11 has moved to the predetermined position). When the ball screw member 11 is linearly moved in the right direction, a lower end (not shown) of the connecting arm 13 is pressed against one wall surface 12a of the concave portion 12, so that the connecting arm 13 and the ball screw member 11 are also illustrated. Move straight from left to right.

  Further, the linear movement of the connecting arm 13 causes the rod shaft 10 connected to the connecting arm 13 to linearly move from the left side to the right side in FIG. 1 to a predetermined position (FIG. 1 shows that the rod shaft 10 moves to a predetermined position). State). A limit switch (not shown) is provided around the rod shaft 10, and when the rod shaft 10 linearly moves to a predetermined position shown in FIG. 1, the limit switch (not shown) is turned on. The drive of the electric motor 9 is stopped by a stop signal output from the ECU 14 based on the signal.

  By the linear movement of the rod shaft 10 in the right direction, the parking pole operating arm 28 rotates counterclockwise about the rotating shaft 27 via the push-pull cable 21, and is integrated with the parking pole operating arm 28. The parking gear pressing arm 30 and the detent arm 34 rotate counterclockwise about the rotation shaft 27 (FIG. 1 shows that the parking pole operating arm 28, the parking gear pressing arm 30, and the detent arm 34 rotate to a predetermined position. Moved state).

  As a result, the detent mechanism 7 is actuated, and the urging force of the urging spring 35 makes contact with the tip peripheral surface of the detent arm 34 (initially, the bottom of the second detent recess 34b (see FIG. 4)) with a predetermined pressure contact force. The roller pin 32 slidingly enters the first detent recess 34a from the second detent recess 34b via the top of the detent convex curved surface 34c while being slid by the biasing force of the biasing spring 35. .

FIG. 3 shows the peripheral surface of the roller pin 32 and the tip of the detent arm 34 during the above-described detent operation by the detent mechanism 7 (the peripheral surface from the second detent recess 34b to the first detent recess 34a via the top of the detent convex curved surface 34c). it is a graph showing a change of the detent load generated (K ₁₎ and the suction force (K ₂₎ between. In FIG. 3, the vertical axis indicates the magnitude of the load (detent load (K ₁ ), suction load (K ₂ )), and the horizontal axis indicates from the second detent recess 34 b of the detent arm 34 with which the roller pin 32 contacts. A distance along the circumferential surface from the top of the detent convex curved surface 34c to the first detent concave portion 34a (hereinafter referred to as a stroke).

As shown in FIG. 3, when the roller pin 32 is positioned at the bottom of the second detent recess 34b of the detent arm 34 by the detent operation of the detent mechanism 7 (parking lock release state (see FIG. 4): stroke A predetermined detent load (K ₁ ) is generated when the sliding contact is made from the position of S _{0 to} the top of the detent convex curved surface 34c (between the strokes S _{0 to} S ₁ ). The detent load (K ₁ ) is 0 at the top of the detent convex curved surface 34c (position of the stroke S ₁ ).

When the roller pin 32 passes the top of the detent convex curved surface 34c of the detent arm 34, a predetermined suction load (K ₂ ) is generated on the bottom of the first detent recess 34a by the biasing force of the biasing spring 35 (stroke S _1). To S ₃ ), the roller pin 32 enters the bottom of the first detent recess 34 a so as to be sucked by the suction load (K ₂ ) (parking lock state (see FIG. 1): position of the stroke S 4). The stroke S _{2 in} FIG. 3 is a position in the vicinity where the suction load (K ₂ ) is maximum.

  Then, almost in synchronization with the roller pin 32 entering the bottom of the first detent recess 34a, the pressing roller 29 provided on the distal end side of the parking gear pressing arm 30 abuts against the side surface 5c of the parking pole 5 and pushes in, As shown in FIG. 1, the pawl portion 5 a of the parking pole 5 engages with the tooth groove 4 a of the parking gear 4 to enter the parking lock state.

In the present embodiment, the roller pin 32 passes the top of the detent convex curved surface 34c of the detent arm 34, and the stroke S in which the suction load (K ₂ ) is preferably maximized between the strokes SS _{1 to} S _{3 in} FIG. It is set so that a limit switch (not shown) provided around the rod shaft 10 is turned ON when it is positioned near ₂ . As a result, when the roller pin 32 is positioned in the vicinity of the stroke S ₂ where the suction load (K ₂ ) is maximum, a limit switch (not shown) is turned on, and a stop output from the ECU 14 based on this ON signal. When the electric motor 9 is stopped by the signal, the linear movement of the rod shaft 10 is stopped.

  At this time, as shown in FIG. 3, the detent arm 34 is operated as described above by the suction load generated when the roller pin 32 enters the bottom of the first detent recess 34a by the biasing force of the biasing spring 35. It swings slightly in the opposite direction (left direction). As the detent arm 34 swings, the parking pole operating arm 28 swings slightly to the left. Further, the force accompanying this swing (the force corresponding to the suction load) passes through the push-pull cable 21 to the rod shaft. 10 is transmitted.

  At this time, even when the electric motor 9 is in the drive stopped state, the ball screw member 11 is provided with a plurality of freely rotatable balls disposed on a spiral track formed between the screw groove 9b of the output shaft 9a and the screw groove 22a of the nut 22. The steel ball 23 circulates and moves through a circulation path (not shown), so that it can smoothly move linearly along the axial direction of the output shaft 9a while rotating the output shaft 9a. At this time, the suction load is adjusted to be larger than the load (axial load) necessary for moving the rod shaft 10 integrally with the ball screw member 11.

  As a result, the rod shaft 10 in a stopped state moves linearly in response to the input of the force accompanying the swing (the force corresponding to the suction load), and the amount of movement (stroke) of the rod shaft 10 is corrected.

  In this way, the stop position of the rod shaft 10 can be adjusted by the suction load at this time according to the detent operation in which the roller pin 32 enters the bottom of the first detent recess 34a. Without fine adjustment of the ON position of the limit switch (not shown) and fine adjustment of the length (wire length) of the push-pull cable 21, the detent operation and the rod shaft 10 in which the roller pin 32 enters the bottom of the first detent recess 34 a. It is possible to accurately synchronize the movement amount (stroke).

  Therefore, the fine adjustment of the stop position of the rod shaft 10 or the fine adjustment of the length of the push-pull cable 21 between the rod shaft 10 and the detent mechanism 7 can be saved, and further, the mechanism for these fine adjustments is omitted. be able to.

  In addition, from the parking lock state of FIG. 1, by operating the operating lever 15 from the position P to N, for example, and rotating the electric motor 9 in the reverse direction, the parking lock state is released in the reverse operation to the parking lock operation described above ( The pawl portion 5a of the parking pole 5 can be detached from the tooth gap 4a of the parking gear 4. At this time, as shown in FIG. 4, the detent mechanism 7 is operated, and a predetermined pressure contact force is applied to the front peripheral surface of the detent arm 34 (initially, the bottom of the first detent recess 34 a) by the urging force of the urging spring 35. The second detent recess 34b is configured such that the roller pin 32 that is in contact with the second pin is sucked by the biasing force of the biasing spring 35 from the first detent recess 34a through the top of the detent convex curve 34c while sliding on the surface. to go into.

  Even when the normal parking lock is released, the stop position of the rod shaft 10 is changed by the suction load at this time according to the detent operation in which the roller pin 32 enters the bottom of the second detent recess 34b, as in the parking lock described above. Since the adjustment can be performed, the roller pin 32 can be adjusted to the second detent recess without fine adjustment of the ON position of a limit switch (not shown) provided around the rod shaft 10 and fine adjustment of the length of the push-pull cable 21. It is possible to accurately synchronize the detent operation entering the bottom of 34b and the movement amount (stroke) of the rod shaft 10.

  Further, in the electric parking lock device 1 according to the above-described embodiment, the manual operation lever 19 is connected to the rod shaft 10 via the push-pull cable 20, and the electric operation lever 19 is operated when the electric motor 9 cannot be driven. By pulling forward or pushing forward, the rod shaft 10 can be directly moved linearly to perform the above-described parking lock operation or parking lock release operation.

The schematic structure figure showing the electric parking lock device concerning the embodiment of the present invention. The schematic sectional drawing which shows the ball screw member used for the electric parking lock apparatus which concerns on embodiment of this invention. Shows the change of the detent load in detent operation (K ₁₎ and the suction force (K _2). The figure which shows the parking lock cancellation | release state of the electric parking lock apparatus which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric parking lock device 2 Electric actuator 4 Parking gear 4a Tooth groove 5 Parking pole 5a Claw part 6 Parking pole operating mechanism (parking pole operating means)
7 Detent mechanism 9 Electric motor (electric drive source)
9a Output shaft 10 Rod shaft 11 Ball screw member 12 Concave part (linear motion transmission mechanism)
13 Connecting member (Linear motion transmission mechanism)
14 ECU (parking command means)
15 Shift lever 16 Shift device 19 Manual operation lever 21 Push-pull cable (transmission member)
28 Parking pole operating arm 30 Parking gear holding arm 31 Roller arm (arm member)
32 Roller Pin 34 Detent Arm 34a First Detent Concave 34b Second Detent Concave 34c Detent Convex Curve 35 Biasing Spring (Biasing Unit)

Claims (1)

An electric drive source that generates a driving force for engaging / disengaging the parking pole with respect to the parking gear according to the output of the parking command means, and a screw groove formed on the output shaft of the electric drive source, A ball screw member capable of converting a rotational motion of the output shaft by driving of a drive source into a linear motion; a linearly movable rod shaft installed in parallel with the output shaft; and the ball screw member and the rod shaft. A linear motion transmission mechanism provided therebetween, a parking pole operating means operable to engage or disengage the parking pole with respect to the parking gear in accordance with a linear movement of the rod shaft, and the parking pole operating means The detent load is generated corresponding to when the parking pole is engaged or disengaged with respect to the parking gear by the operation of And a transmission member that transmits linear movement of the rod shaft to the parking pole actuating means and the detent mechanism, and the ball screw member linearly rotates the output shaft driven by the electric drive source. Converted into motion, the converted linear motion is transmitted to the rod shaft via the linear motion transmission mechanism, the parking pole actuating means is actuated via the transmission member by linear movement of the rod shaft, and An electric parking lock device that operates a detent mechanism via the transmission member,
The detent mechanism includes a roller pin provided on a swingable arm member, a detent arm rotatable in response to the operation of the parking pole actuating means, and the roller pin in contact with a peripheral surface of the tip of the detent arm. A biasing means for biasing and a first roller pin engaged with the parking pawl according to an operation of engaging the parking pawl with the parking gear by the operation of the parking pole actuating means formed on the front peripheral surface of the detent arm. The detent recess, the detent convex surface continuous with the first detent recess, and the roller pin according to the operation of the parking pawl detaching from the parking gear by the operation of the parking pawl operating means continuous with the detent convex surface. A second detent recess to be joined,
The detent arm is rotated in response to the operation of the parking pole actuating means by driving the electric drive source, and the second detent is passed from the first detent recess to the detent convex curved surface. When engaging with the recess, and when engaging the roller pin with the first detent recess through the surface of the detent convex curve from the second detent recess, the roller pin exceeds the top of the detent convex curve The driving of the electric drive source is stopped when the second detent recess or the bottom of the first detent recess is positioned a predetermined section before the roller pin is driven by the biasing force of the biasing means. Moving to the second detent recess or the bottom of the first detent recess,
An electric parking lock device.

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