Title:
BALL SCREW DEVICE AND METHOD FOR MANUFACTURING SCREW SHAFT
Document Type and Number:
WIPO Patent Application WO/2023/132190
Kind Code:
A1
Abstract:
The present invention achieves a ball screw device that has a reduced number of components and thus can achieve increased assemblability even when adopting a structure which rotationally drives a screw shaft via a planetary speed reducing mechanism. A screw shaft (2) has a screw portion (10) that has a spirally-shaped shaft-side ball screw groove (12) in the outer peripheral surface, and carrier (11) that is formed integrally with the screw portion (10) and forms a planetary speed reducing mechanism (7). An inner ring raceway (14) that forms a rolling bearing (5) for rotationally supporting the carrier (11) is directly formed in the outer peripheral surface of the carrier (11).
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Inventors:
SEGAWA RYO (JP)
Application Number:
PCT/JP2022/045691
Publication Date:
July 13, 2023
Filing Date:
December 12, 2022
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16H25/24; B60T13/74; F16C19/16; F16H25/22
Foreign References:
| JP2009275914A | 2009-11-26 | |||
| JP2016148374A | 2016-08-18 | |||
| US20180345934A1 | 2018-12-06 | |||
| JP2008281142A | 2008-11-20 | |||
| JP2018194080A | 2018-12-06 | |||
| JP2011027154A | 2011-02-10 | |||
| JPH0796341A | 1995-04-11 | |||
| JP2009286137A | 2009-12-10 |
Attorney, Agent or Firm:
KIWA INTERNATIONAL (JP)
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