Patent ID: 9054563
Filing Date: 2015-06-09
Classification: B62D,F16C,H02K

Abstract:
1. A motor for an electric power steering device, comprising: a rotor which is placed in a frame; a housing side bearing which is placed on the output side of a shaft of said rotor, and is supported by a housing connected to said frame; and a frame side bearing which is placed on the opposite output side of said shaft of said rotor, and is composed of an outer ring and an inner ring supported by said frame, wherein said motor is controlled by an electronic control unit which is coaxially placed with said rotor on the output side of said shaft of said rotor, said motor including: a bearing box which supports said frame side bearing, and is formed with a closed end section having an air gap between the closed end section and the side of said frame side bearing; an axial elastic body which is placed on the closed end section of said bearing box, and applies a preload in an axial direction to said outer ring of said frame side bearing; and a radial elastic body which is placed on the outer circumferential side of said outer ring of said frame side bearing, and applies a preload in a direction perpendicular to the axial direction.