WORM GEAR SUPPORTING DEVICE OF A MOTOR DRIVEN POWER STEERING SYSTEM CAPABLE OF SUPPORTING A WORM GEAR SHAFT OF A WORM GEAR USING DOUBLE SPRINGS HAVING DIFFERENT MODULUS OF ELASTICITY

摘要

PURPOSE: A worm gear supporting device of a motor driven power steering system is provided to reduce rattle noise by supporting a worm gear shaft effectively according to the size of inverse input load using double springs having different modulus of elasticity, and to improve durability by reducing the friction of a worm gear and a worm wheel gear. ;CONSTITUTION: A worm gear supporting device of a motor driven power steering system contains a sliding pin(5) contacted with one end of a worm gear shaft(4) to apply pressure, a bearing spring(6) inserted to the sliding pin to support the sliding pin elastically and having the constant modulus of elasticity, a plug(7) mounted to the housing to prevent the separation of the bearing spring, and a damper(8) inserted between the plug and the sliding pin and arranged at a certain distance from the sliding pin, wherein the bearing spring is a coil spring having the constant modulus of elasticity, and the damper is formed with rubber having the different modulus of elasticity from the spring.;COPYRIGHT KIPO 2011