TRANSFER RATIO VARIABLE MECHANISM

摘要

PROBLEM TO BE SOLVED: To provide a transfer ratio variable mechanism which has a length in the radial direction shorter than that of a conventional transfer ratio variable mechanism. SOLUTION: The transfer ratio variable mechanism 11 includes a housing 13 for accommodating the body 30 of the mechanism which varies a transfer ratio between the steering angle of a steering wheel and the steering angle of front wheels. A hollow shaft 12 is formed at the end part of the input side of the housing 13 and a spiral cable case 25 is fitted on the outside of the hollow shaft 12. A bush 26 has an insertion member 26a and a flange piece 26 of thin plate which projects in the radial direction from the end part opposite to the insertion member 26a. The insertion member 26a is pressed into the tip of the hollow shaft 12 so that it is secured and the flange piece 26b causes the spiral cable case 25 to be pressed into the housing 13 side so that it is secured. Since the thickness of the flange piece 26 is thin (that is, being short in the axial direction O), the overall length of the transfer ratio variable mechanism in the axial direction O becomes short.