Park pawl for electric vehicle transmissions

摘要

A parking pawl is implemented on a series type, hybrid electric vehicle using a pair of parallel worm gear rollers. The worm gear rollers are placed on opposite sides of a transmission gear from one another and mounted for rotation along their major axes allowing the worm gear rollers to be rotated to present either a planed side or a threaded section to the gear. The gear is circumferentially slotted to cooperate with the threaded section of the rollers to prevent rotation of the gear, but to turn freely when the planed faces of the worm gear roller are adjacent the gear.