公开(公告)号：US20150274195A1

公开(公告)日：2015-10-01

申请号：US14606571

申请日：2015-01-27

Applicant: Showa Corporation

Inventor： Shinichi TOKURA ,  Ryo TAKAHASHI

IPC: B62D3/12 ,  B62D5/04

CPC classification number: B62D3/126 ,  B62D3/12 ,  B62D5/0409 ,  F16C29/02 ,  F16C33/08 ,  F16C35/02

Abstract: To suppress the loosening of a bush when an ambient temperature varies. A motor-driven power steering apparatus according to the present invention includes a rack shaft moving steered portions based on the steering in a steering wheel, an end case covering the rack shaft and having an inner peripheral groove along a circumferential direction of the rack shaft on an inner peripheral surface facing the rack shaft and a bush arranged inside the inner peripheral groove of the end case and supporting the rack shaft so as to slide. Here, an outer peripheral surface of the bush includes a first protrusion and a second protrusion protruding toward a bottom portion of the inner peripheral groove at different positions in an axial direction of the rack shaft. The bottom portion of the inner peripheral groove includes a first groove and a second groove receiving the first protrusion and the second protrusion.

Abstract translation: 为了在环境温度变化时抑制衬套的松动。 根据本发明的电动助力转向装置包括基于方向盘中的转向的齿条轴移动转向部分，覆盖齿条轴的端壳，并且沿着齿条轴的圆周方向具有内周槽 面向齿条轴的内周表面和布置在端壳的内周槽内部的衬套，并且支撑齿条轴以滑动。 这里，衬套的外周面包括在齿条轴的轴向上的不同位置处朝向内周槽的底部突出的第一突起和第二突起。 内周槽的底部包括第一槽和容纳第一突起和第二突起的第二槽。