Patent ID: 6324878
Filing Date: 2001-12-04
Classification: B60R,H02M,Y10T

Abstract:
A steering lock device comprising:an override cam;a lock bolt;an override spring clutch attaching the override cam to the lock bolt;an electric motor having a rotational output shaft;a worm connected to the rotational output shaft of the motor;a worm gear meshed with the worm so as to form a mesh, wherein the mesh between the worm and the worm gear is non-backdriveable, and wherein a gear ratio at the mesh between the worm gear and the worm is greater than fifty to one, so that the worm gear rotates at least one revolution for every fifty revolutions of the worm;a cam attached to the rotational axis of the worm gear, the cam having a moment arm extending substantially perpendicular to the rotational axis of the worm gear, anda cam roller slidingly and rollingly engaged with the cam, the cam roller mounted within and contacting the override cam, wherein, in a locked position, the cam roller is positioned near the free end of the moment arm, and, in an unlocked position, the cam roller is near the rotational axis of the worm gear.