GIMBALLED DRIVE BLOCK FOR VEHICLE SEAT ADJUSTER

摘要

A drive apparatus suitable for a power seat adjuster includes a rotatable lead screw (58) disposed between an upper track (16) movably mounted with respect to a stationary lower track (10). A drive block (30) is rotatably mounted in the lower track (10) for rotation about an axis extending perpendicular to the lower track (10). A first bore (56) extends through the drive block (30) for receiving the lead screw (58) carried on the upper track (16). An insert body (70) is movably mounted in a second bore (62) in the drive block (30), the second bore (62) extending transversely to and intersecting the first bore (56). A transverse, threaded third bore formed in the insert body (70) threadingly engages the lead screw (58). The first bore (56) has a larger diameter than the diameter of the lead screw (58) to permit pivotal movement of the insert body (70) and the lead screw (58) about an axis extending through the second bore (62). The first bore (56) also has a larger diameter than the third bore in the insert body (70) to permit lateral movement of the insert body (70) within the drive block (30) while maintaining a first bore (56) and the third bore in the insert body (70) in communication.