公开(公告)号：US09809244B2

公开(公告)日：2017-11-07

申请号：US14861561

申请日：2015-09-22

Applicant: Showa Corporation

Inventor： Takayuki Tetsuka

IPC: B62J13/00 ,  F16D1/00 ,  F16H57/02 ,  B62D5/04

CPC classification number: B62D5/0424 ,  B62D5/0403

Abstract: A housing structure includes first and second housings and first and second rotation transmitting members. The first and second housings house a shaft. The first rotation transmitting member is provided coaxially with the shaft. The second rotation transmitting member is arranged so as to transmit power to the first rotation transmitting member. The first and second housings are combined with each other so that mating surfaces of the first and second housings that are unparallel to an axis of the shaft are contacted. The first housing includes a first guide portion that protrudes from the mating surface of the first housing. The second housing includes a second guide portion that engages with the first guide portion. The first and second guide portions are engaged with each other along a circumferential direction of the axis and guide relative rotation of the first housing and the second housing around the axis.

公开(公告)号：US20210061346A1

公开(公告)日：2021-03-04

申请号：US16611439

申请日：2017-06-29

Applicant: SHOWA CORPORATION

Inventor： Yukinari Sato ,  Takayuki Tetsuka ,  Shingo Ishige ,  Akira Shirakawa ,  Tsukasa Suzuki

IPC: B62D5/04 ,  F16F15/08 ,  F16C27/02

Abstract: A vehicle steering device includes a turning shaft held in a housing so as to be movable in the axial direction, a ball screw transmitting drive force produced by an electric motor to the turning shaft, a bearing supporting a nut, which is a component of the ball screw, so as to be rotatable relative to the housing, and annular elastic members that support side faces of the bearing in the axial direction of the turning shaft across the entire circumference, and are formed of an elastic material. The elastic members include respective first elastic portions having a first load characteristic that gently increases the ratio of compression load per a unit compression amount deforming in the axial direction of the turning shaft, and respective second elastic portions having a second load characteristic that keenly increases the ratio in comparison with the first load characteristic.

公开(公告)号：US11685425B2

公开(公告)日：2023-06-27

申请号：US17061034

申请日：2020-10-01

Applicant: SHOWA CORPORATION

Inventor： Satoshi Enomoto ,  Takayuki Tetsuka

IPC: B62D5/04 ,  B62D3/12 ,  F16H7/02

CPC classification number: B62D5/0403 ,  B62D3/12 ,  B62D5/0424 ,  F16H7/02

Abstract: An electric power steering device includes: an electric motor; a rack shaft configured to move axially; a conversion unit configured to convert rotational driving force of the moto into movement of the rack shaft; a first housing configured to cover a part of an outer surface of the rack shaft and including a first leg portion fixed to a vehicle; a second housing configured to cover a part of the outer surface of the rack shaft and including a fourth connecting portion covering the conversion unit and a second leg portion fixed to the vehicle; and an intermediate housing disposed between the first and second housings and configured to cover a part of the outer surface of the rack shaft 3 and including a motor support portion supporting the motor.