Title:
BALL SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/132172
Kind Code:
A1
Abstract:
Provided is a ball screw device having a structure in which a screw shaft is rotated and driven via a planetary speed reduction mechanism, wherein the number of components is reduced and assemblability is improved. A screw shaft (2) includes: a screw portion (11) having on an outer circumferential surface thereof a spiral-shaped shaft-side ball screw groove (13); and a fitting shaft portion (12). A carrier (5) constituting a planetary speed reduction mechanism (8) is secured so as to be incapable of rotating relative to the fitting shaft portion (12). An inner ring raceway (28) constituting a rolling bearing (6) for rotatably supporting the carrier (5) is formed directly on the outer circumferential surface of the carrier (5).
Inventors:
SEGAWA RYO (JP)
Application Number:
PCT/JP2022/044845
Publication Date:
July 13, 2023
Filing Date:
December 06, 2022
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16H25/24; B60T13/74; F16C19/16; F16C33/58; F16H25/22
Foreign References:
| JP2009275914A | 2009-11-26 | |||
| US20180345934A1 | 2018-12-06 | |||
| JP2011133073A | 2011-07-07 | |||
| JP2018194080A | 2018-12-06 | |||
| JP2016148374A | 2016-08-18 |
Attorney, Agent or Firm:
KIWA INTERNATIONAL (JP)
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