Title:
BALL-SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/035563
Kind Code:
A1
Abstract:
A ball-screw device 1 has, in order to supply a lubricant between a screw shaft 4 and a nut 7, a lubricant supply passage 31 which has a lubricant outlet 36 in the inner peripheral surface of the nut 7 is provided in a flange 28. The opposite ends of the threaded hole of the nut 7 respectively serve as discharge openings for the lubricant supplied between the screw shaft 4 and the nut 7. A seal member 42 provided at the end of the nut 7, which is close to the lubricant outlet 36, has a larger force of adhesion to the outer peripheral surface of the screw shaft 4 than a seal member 54 provided at the end of the nut 7, which is away from the lubricant outlet 36, and consequently, the lubricant is unlikely to leak.
Inventors:
OKA KEITARO (JP)
MARUYAMA DAISUKE (JP)
MARUYAMA DAISUKE (JP)
Application Number:
PCT/JP2015/073409
Publication Date:
March 10, 2016
Filing Date:
August 20, 2015
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16H25/24; F16H25/22; F16J15/32
Foreign References:
| JPH0488756U | 1992-07-31 | |||
| JPH11118017A | 1999-04-30 | |||
| JPS59164861U | 1984-11-05 | |||
| JP2008133944A | 2008-06-12 | |||
| JP2011133049A | 2011-07-07 |
Attorney, Agent or Firm:
INOUE, Yoshio et al. (JP)
Yoshio Inoue (JP)
Yoshio Inoue (JP)
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