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Title:
SCREW APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/057306
Kind Code:
A1
Abstract:
Provided is a screw apparatus equipped with seal rings, which enables easy assembly and a reduction in the number of components. The screw apparatus according to the present invention is provided with: a screw shaft (1); a nut (2) that has a through-hole through which the screw shaft (1) is inserted, and that is screwed together with the screw shaft (1) via a roller; seal rings (13a, 13b) that have holes matching the shape of a cross-section the screw shaft (1) perpendicular to an axis thereof, and that prevents dusts from entering the nut (2) and/or prevents a lubricant inside the nut (2) from leaking outside; and a cap (4) that is to be attached to the nut (2), and that has projections (23) fitting recesses (22) of the seal rings (13a, 13b) so as to be able to position the seal rings (13a, 13b) in a circumferential direction, and has steps (33-2) to be brought into contact with the seal rings (13a, 13b) so as to be able to position the seal rings (13a, 13b) in an axial direction.

Inventors:
NISHIDE TETSUHIRO (JP)
YOSHINO MASAHIKO (JP)
SHINOHARA TOSHIAKI (JP)
Application Number:
PCT/JP2016/078336
Publication Date:
April 06, 2017
Filing Date:
September 27, 2016
Export Citation:
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Assignee:
THK CO LTD (JP)
International Classes:
F16H25/24; F16J15/18
Foreign References:
JP2008045632A2008-02-28
US4407511A1983-10-04
US4052076A1977-10-04
JP2013119933A2013-06-17
JP2000161462A2000-06-16
Attorney, Agent or Firm:
SHIOJIMA, Toshiyuki (JP)
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