公开(公告)号：US12146552B2

公开(公告)日：2024-11-19

申请号：US18265557

申请日：2022-08-03

Applicant: NSK LTD.

Inventor： Yasumi Watanabe ,  Ryo Segawa ,  Tomoko Miyamori

IPC: F16H25/20 ,  F16H25/22

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.

公开(公告)号：US12196292B2

公开(公告)日：2025-01-14

申请号：US18288726

申请日：2022-12-06

Applicant: NSK Ltd.

Inventor： Shuhei Yumiba ,  Yasumi Watanabe ,  Yasuaki Abe

IPC: F16H25/22

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：US12173777B2

公开(公告)日：2024-12-24

申请号：US18026463

申请日：2021-10-20

Applicant: NSK LTD.

Inventor： Reona Umei ,  Yasumi Watanabe ,  Yuji Shimomura

IPC: F16H25/20 ,  F16H25/22 ,  F16H25/24 ,  B60T13/74

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：US11808328B2

公开(公告)日：2023-11-07

申请号：US18031926

申请日：2022-10-13

Applicant: NSK Ltd.

Inventor： Yasuaki Abe ,  Shuhei Yumiba ,  Yasumi Watanabe

IPC: F16H25/22

CPC classification number: F16H25/2219

Abstract: To provide a nut that can suppress increase in the number of components. 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, a through hole, and a pair of side surfaces. The circulation component includes a circulation component main body, two arm parts extending toward both sides in a seat surface direction from the circulation component main body, ribs projecting from the respective two arm parts, and caulking parts obtained by caulking the ribs. Recessed parts that the caulking parts enter are disposed on the pair of side surfaces. A ball passage is disposed in the circulation component main body.