US Patent 10919565 Noise reduction structure of electronic power steering apparatus

A noise reduction structure of an electronic power steering apparatus including a worm shaft rotated by a motor, a worm wheel engaged in the worm shaft and rotating a steering shaft, and a housing surrounding the worm shaft includes a cylindrical damper unit formed as an elastic member in an inner side of the cylindrical damper unit for absorbing a shock transmitted to the worm shaft and rotatably connected to the worm shaft, a rubber holder coupled to a semi-cylindrical damper holder formed on a side surface of the damper unit for making a close contact between the worm shaft and the worm wheel, and a plug unit including a plug holder formed on a lower end of a side surface of the plug unit for coupling to the rubber holder and fixed to the housing on the other side of the plug unit.