公开(公告)号：US20230349453A1

公开(公告)日：2023-11-02

申请号：US18026463

申请日：2021-10-20

Applicant: NSK LTD.

Inventor： Reona UMEI ,  Yasumi WATANABE ,  Yuji SHIMOMURA

IPC: F16H25/22 ,  F16H25/20 ,  F16H25/24

CPC classification number: F16H25/2204 ,  F16H25/2015 ,  F16H25/24 ,  B60T13/745 ,  F16H2025/2081

Abstract: A linear motion actuator has a ball screw device having a screw shaft, a nut, and a plurality of balls, a piston mounted on one end of the screw shaft, and a stroke limiting mechanism setting an operation starting point in time of the screw shaft toward a first direction pointed by the one end. The nut has one end face directed to the first direction and a protruding part protruding from the one end face.

公开(公告)号：US20240209927A1

公开(公告)日：2024-06-27

申请号：US18288726

申请日：2022-12-06

Applicant: NSK Ltd.

Inventor： Shuhei YUMIBA ,  Yasumi WATANABE ,  Yasuaki ABE

IPC: F16H25/22

CPC classification number: F16H25/2214

Abstract: The nut according to the present disclosure includes a nut main body and a circulation component. The nut main body includes a housing part having a bow shape when viewed from an axial direction, a seat surface forming a bottom surface of the housing part, a through hole passing through the seat surface, and a pair of side surfaces arranged on both sides in the axial direction with respect to the housing part.

公开(公告)号：US20240026959A1

公开(公告)日：2024-01-25

申请号：US18265557

申请日：2022-08-03

Applicant: NSK LTD.

Inventor： Yasumi WATANABE ,  Ryo SEGAWA ,  Tomoko MIYAMORI

IPC: F16H25/22 ,  F16H25/20

CPC classification number: F16H25/2204 ,  F16H25/2015 ,  F16H2025/204

Abstract: The nut has a first fitting surface provided with a first retaining ring groove on an end portion on the other side in the axial direction; the fitting cylinder, at an end portion on the one side in the axial direction, has a second fitting surface provided with a second retaining ring groove in a portion facing the first retaining ring groove with regard to a radial direction; and the retaining ring is engaged so as to span between the first retaining ring groove and the second retaining ring groove.