Title:
BALL SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/224903
Kind Code:
A1
Abstract:
[Problem] To provide a ball screw device wherein rotation of a nut that is a linear movement element can be stopped using a small number of components, and thus a reduction in manufacturing cost can be achieved. [Solution] A radially inside section of a rotation-stopping member 7 that prevents rotation of a nut 3 relative to a housing 6 is positioned inside a retention recess 19 while sandwiched between a blocking surface 20 of the same and an end surface 5x, which is on one side in the axial direction of a piston 5 fixed to the nut 3 by external fitting, said retention recess 19 being provided in an outer circumferential surface of the nut 3. A radially outside section of the rotation-stopping member 7 is positioned, in a manner allowing sliding in the axial direction, inside a guidance recess groove 24 that is provided in an inner circumferential surface of a cylinder hole 8 of the housing 6.
Inventors:
SEGAWA RYO (JP)
Application Number:
PCT/JP2022/017820
Publication Date:
October 27, 2022
Filing Date:
April 14, 2022
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16H25/20; F16H25/22
Foreign References:
| JP2021035311A | 2021-03-01 | |||
| JP2014145465A | 2014-08-14 | |||
| JP2012132557A | 2012-07-12 | |||
| JP2007303515A | 2007-11-22 | |||
| JP2007303515A | 2007-11-22 |
Other References:
See also references of EP 4134569A4
Attorney, Agent or Firm:
KIWA INTERNATIONAL (JP)
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