PARKING LOCK DEVICE FOR VEHICLE

摘要

The shape of the outer peripheral edge, or a cam surface (30), of a detent plate (10) is formed so that the ratio (RC/RL) between the curvature radius (RC, = R74) of a third R portion (74) and the distance (RL, = R10) between the curvature center of an engagement roller (32) in a first recessed valley portion (26) and the pivot center of the detent plate is equal to or less than 0.12. As a consequence, when the detent plate (10) is positioned at a parking lock position, the amount (alpha) of return of the detent plate (10) from the parking lock position to a position where pivoting torque (Tk) is zero is reduced even when a parking wheel (45) is not engaged with a parking gear (42).