Title:
BALL SCREW DEVICE AND STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/139787
Kind Code:
A1
Abstract:
A ball screw device (21) comprises a screw shaft (31) having a screw groove (43) on the outer periphery, a ball screw nut (32) having a screw groove on the inner periphery, a plurality of return tubes, and a plurality of balls (33). The plurality of return tubes includes at least a first return tube (34) and a second return tube. The position of a first end part of the second return tube, relative to the position of a first end part (91) of the first return tube (34) in the circumferential direction of the ball screw nut (32), is a first relative position, and the position of a second end part of the second return tube, relative to the position of a second end part (92) of the first return tube (34) in the circumferential direction, is a second relative position. At least one of the first relative position and the second relative position includes circumferential misalignment.
Inventors:
YAMAMOTO RYUTA (JP)
Application Number:
PCT/JP2022/002420
Publication Date:
July 27, 2023
Filing Date:
January 24, 2022
Export Citation:
Assignee:
JTEKT CORP (JP)
International Classes:
F16H25/22
Foreign References:
| JP2018105397A | 2018-07-05 | |||
| JP2017150502A | 2017-08-31 |
Attorney, Agent or Firm:
ONDA Makoto et al. (JP)
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