Title:
BALL SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/204002
Kind Code:
A1
Abstract:
This ball screw device comprises a screw shaft, a nut, a plurality of balls, a circulation component, a base component, and a fixing component. The nut is provided with a through hole penetrating therethrough in an assembling direction. The circulation component has a cylindrical part, a leg part, and two bent parts. The base component has a body part extending along the cylindrical part and the bent parts. The body part has a groove-like seat surface. The seat surface has a cross-sectional shape forming an arc around the center line of the cylindrical part and the bent parts. The portion of the seat surface abutting on the cylindrical part forms an arc-like support surface open in the direction opposite to the assembling direction, as viewed from a rotation axis direction parallel to the center line of the cylindrical part. The portion of the seat surface abutting on the bent parts forms an arc-like regulation surface open toward the through hole, as viewed from the assembling direction. The regulation surface has a first regulation part that abuts on the bent parts from a first rotation direction, and a second regulation part that abuts on the bent parts from a second rotation direction.
Inventors:
OKA KEITARO (JP)
Application Number:
PCT/JP2023/013760
Publication Date:
October 26, 2023
Filing Date:
April 03, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16H25/22
Foreign References:
| JPS5076281U | 1975-07-03 | |||
| JPH04116051U | 1992-10-15 | |||
| US20160223058A1 | 2016-08-04 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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