Parking lock for a motor vehicle and method of operating a parking lock

摘要

A parking lock assembly for a motor vehicle is described that has at least one electrically drivable driving axle. The parking lock comprises an electric drive, a shaft which is arranged in the driveline of a motor vehicle and which is drivable by the electric drive, as well as a locking mechanism which is controllable in the locking sense in order to prevent a rotational movement of the shaft and which is controllable in the opening sense in order to release the shaft. The electric drive is controllable in order to transmit torque to the shaft if, in spite of the locking mechanism being controlled in the opening sense, the shaft is prevented from carrying out a rotational movement. Furthermore, a method of actuating such a parking lock assembly is described.

主权项

1. An electric drive assembly for driving a driving axle of a motor vehicle, said electric drive assembly comprising:
an electric drive having an electric drive output shaft; a differential drive having a differential carrier which is rotatably driveable around an axis of rotation, wherein the axis of rotation of the differential carrier is radially offset relative to a rotational axis of the electric drive output shaft; a gear drive arranged between the electric drive and the differential drive so as to transmit torque from the electric drive to the differential drive; wherein said gear drive comprises an intermediate shaft which is arranged parallel to the electric drive output shaft and the axis of rotation of the differential carrier, wherein an intermediate shaft axis of said intermediate shaft is radially offset relative to the rotational axis of the electric drive output shaft and relative to the axis of rotation of the differential carrier; and a locking mechanism which is controllable to selectively block a rotational movement of the intermediate shaft or to release the intermediate shaft so as to be freely rotateable;wherein said locking mechanism comprises an electrically controllable actuator, a locking member which is operable by said actuator and a ratchet wheel which is connected to the intermediate shaft in a rotationally fixed way, wherein the locking member cooperates with the ratchet wheel such that, in a locking position, the ratchet wheel is blocked against rotational movement and, in an unlocking position, the ratchet wheel is freely rotatable,
wherein the locking mechanism comprises a guiding sleeve for guiding a linear movement of a pressure element, wherein the pressure element is radially supported against said guiding sleeve, with regard to the intermediate shaft axis.