Title:
BALL SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/188057
Kind Code:
A1
Abstract:
This ball screw device (10) comprises a screw shaft (11) having a first spiral groove (21) formed on the outer periphery thereof, a nut (12) having a second spiral groove (22) formed on the inner periphery thereof, and a plurality of balls (13) arranged in a rolling path (23) formed between the first spiral groove (21) and the second spiral groove (22). A circulation path (38) for allowing the balls (13) to circulate between one end and the other end of the rolling path (23) is formed in the nut (12). The nut (12) has a nut body (15) through which the screw shaft (11) is inserted, and a passage-forming member (63, 64) superimposed on a circumferential-direction portion of the outer peripheral surface of the nut body (15). A portion of the circulation path (38) is formed between the nut body (15) and the passage-forming member (63, 64).
Inventors:
TASHIRO AKIYOSHI (JP)
Application Number:
PCT/JP2022/015776
Publication Date:
October 05, 2023
Filing Date:
March 30, 2022
Export Citation:
Assignee:
JTEKT CORP (JP)
International Classes:
F16H25/22; F16H25/24
Domestic Patent References:
| WO2017010407A1 | 2017-01-19 |
Foreign References:
| US3924486A | 1975-12-09 | |||
| JP2002276764A | 2002-09-25 | |||
| JP2016211697A | 2016-12-15 | |||
| JP2013061026A | 2013-04-04 | |||
| CN202914660U | 2013-05-01 |
Attorney, Agent or Firm:
SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)
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