公开(公告)号：US20230311976A1

公开(公告)日：2023-10-05

申请号：US18024880

申请日：2021-08-17

Applicant: Hitachi Astemo, Ltd.

Inventor： Toshinobu SUZUKI ,  Osamu YOSHIDA

IPC: B62D5/04

CPC classification number: B62D5/0454 ,  B62D5/0421

Abstract: An electric power steering device including a first bolt boss of a second housing provided on a first housing side relative to a worm-wheel accommodating portion of the second housing, and has a first female thread portion open on the first housing side and located within a plane area defined by connecting a second pinion shaft, a first bracket hole, and a second bracket hole; and a first bolt boss of the first housing provided to the first housing to be opposed to the first bolt boss of the second housing, and has a first bolt hole located within the plane area defined by connecting the second pinion shaft, the first bracket hole, and the second bracket hole and being formed through the first housing to be continuous with the first female thread portion of the first bolt boss of the second housing.

公开(公告)号：US20230331288A1

公开(公告)日：2023-10-19

申请号：US18044330

申请日：2021-08-10

Applicant: Hitachi Astemo, Ltd.

Inventor： Toshinobu SUZUKI ,  Osamu YOSHIDA

IPC: F16H55/26 ,  B62D3/12 ,  F16H57/032 ,  F16H19/04

CPC classification number: B62D3/126 ,  F16H19/04 ,  F16H55/26 ,  F16H57/032 ,  F16H2057/02082

Abstract: A steering device includes: a steering shaft structured to receive rotational force; a rack bar in engagement with the steering shaft; and a rack housing that is made of a metal and contains the rack bar such that the rack bar is movable. The rack housing includes a tubular section extending in a movable direction of the rack bar, and includes a first inclination section disposed in an axial end of the tubular section and inclined to go away from the rack bar outwardly in a radial direction with respect to the rack bar. The tubular section is structured to contact with the rack bar in response to warping of the rack bar due to input from outside. The first inclination section is structured to contact with the rack bar later than the tubular section in response to warping of the rack bar due to input from outside.

公开(公告)号：US20230159090A1

公开(公告)日：2023-05-25

申请号：US17910135

申请日：2021-02-03

Applicant: HITACHI ASTEMO, LTD.

Inventor： Qixiang WANG ,  Susumu KIMOTO ,  Osamu YOSHIDA

IPC: B62D5/04

CPC classification number: B62D5/0454 ,  B62D5/0412 ,  B62D5/0406 ,  F16H55/24

Abstract: A steering device includes: a worm wheel linked to a steering shaft; a worm shaft engaging with the worm wheel; an electric motor supplying rotational force to the worm shaft and including a motor shaft connected to a first end of the worm shaft; a gear housing containing the worm wheel and the worm shaft; a bearing supporting a second end of the worm shaft; a center adjuster that is contained in the gear housing and includes a holder and a collar, wherein the collar is disposed in the holder and retains the bearing so as to allow the bearing to move with respect to the holder in a gear engagement direction; and a biasing member disposed in the center adjuster and structured to bias the bearing in a direction inclined with respect to the gear engagement direction.

公开(公告)号：US20230069250A1

公开(公告)日：2023-03-02

申请号：US17799235

申请日：2021-02-03

Applicant: HITACHI ASTEMO, LTD.

Inventor： Qixiang WANG ,  Osamu YOSHIDA

IPC: B62D65/02 ,  F16B39/02 ,  B62D3/12

Abstract: A cylindrical part of a rack retainer accommodation part and an adjust screw are caulked such that a plastic deformation region by caulking straddles both a female screw part of the cylindrical part and a male screw part of the adjust screw, and the adjust screw is loosened to a point where a set load that is a force by which the rack retainer urges a rack bar falls within a predetermined range. After the set load adjusting step, the caulking step is not performed again, and fluctuations in the set load associated with the impact of caulking work after the set load adjusting step can be suppressed. Thus, it is possible to suppress fluctuations in the urging force of the rack retainer applied to the rack bar caused by caulking work which stops the rotation between the rack retainer accommodation part and the adjust screw.