Patent ID: 6223615
Filing Date: 2001-05-01
Classification: B60R,F16H,H02K,Y10T

Abstract:
Electric motor-driven servo-drive comprising a small electric drive motor with a motor shaft, a worm of a worm gear pair, the worm being made of plastic and being slid onto the motor shaft, a driver made of a harder material which transfers higher torques than the plastic of the worm on the motor shaft, a worm wheel of the worm gear pair, the wheel being made of plastic and being coupled to the worm via teeth which engage one another, the driver having a worm form-fit element of a diameter which is much greater than that of the motor shaft and the worm having a driver form-fit element which engages the worm form-fit element of the driver; wherein the motor shaft is provided with a gear-form fit element at at least one location; wherein the driver is slid onto the motor shaft and has a corresponding shaft form-fit element which engages the gear form-fit element of the motor shaft; wherein the gear and shaft form-fit elements which engage one another have flat areas; wherein the worm has a slip-on mount for the driver on an end facing the drive motor; wherein the driver is made of a material selected from the group consisting of a metal, a metal combination or a metal alloy; and wherein the driver is a generally ring-shaped punched part.