Title:
LINEAR MOTION GUIDE DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/002170
Kind Code:
A1
Abstract:
Provided is a linear motion guide device which is reduced in contact surface pressure between balls and a track groove so as to be resistant to the occurrence of edge loading even when a slider is loaded with any of pressing load, tensile load, and lateral load. An upper flank (20U) and a lower flank (20L) which are disposed in track grooves (10, 11) of a guide rail (1) and a slider (2) have the following: a main arc portion (21) which is arc-shaped in cross section and located generally at the center in the width direction of the flanks (20U, 20L); a groove shoulder side sub-arc portion (23) which is arc-shaped in cross section and continually formed toward a groove shoulder of the main arc portion (21); and a groove bottom side sub-arc portion (25) which is arc-shaped in cross section and continually formed toward a groove bottom of the main arc portion (21). Further, the radius of curvature (r2p) of the groove shoulder side sub-arc portion (23) is different from the radius of curvature (r2m) of the groove bottom side sub-arc portion (25).
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Inventors:
MATSUMOTO JUN (JP)
Application Number:
PCT/JP2015/003201
Publication Date:
January 07, 2016
Filing Date:
June 25, 2015
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C29/06; F16C33/58
Foreign References:
| JPH04102715A | 1992-04-03 | |||
| JP2009068650A | 2009-04-02 | |||
| JP5349451B2 | 2013-11-20 | |||
| JP2005331099A | 2005-12-02 | |||
| JP2003184874A | 2003-07-03 |
Other References:
See also references of EP 3165781A4
Attorney, Agent or Firm:
MORI, Tetsuya et al. (JP)
Woods Tetsuya (JP)
Woods Tetsuya (JP)
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