Title:
MOTION GUIDE DEVICE, AND SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/050281
Kind Code:
A1
Abstract:
Provided is a motion guide device, which can enlarge the contact area between a roller and a rolling face and can prevent an edge load and a peak contact stress from occurring at the portion where the roller and the rolling face contact each other.
As viewed in a section containing the center line of a roller (3), a rolling face (1b) and a load rolling face (4d) are crowned with a clothoid curve or elliptical curve which has a curvature varied in proportion to the length of the curve and protrudes toward the roller (3). By forming a crowning shape with a clothoid curve or an elliptical curve, the central portion of the roller (3) in the center line direction can be crown-padded, and the crowned depth can be increased at the end portions of the roller (3) in the center line direction. Hence, the roller (3) is prevented from causing the edge load, and the contact areas can be retained between the roller (3), and the rolling face (1b) and the load rolling face (4d).
Inventors:
TAKAHASHI TORU (JP)
IMAI TATSUYA (JP)
IMAI TATSUYA (JP)
Application Number:
PCT/JP2009/063754
Publication Date:
May 06, 2010
Filing Date:
August 03, 2009
Export Citation:
Assignee:
THK CO LTD (JP)
TAKAHASHI TORU (JP)
IMAI TATSUYA (JP)
TAKAHASHI TORU (JP)
IMAI TATSUYA (JP)
International Classes:
F16C29/06; F16H25/22
Domestic Patent References:
| WO2008001835A1 | 2008-01-03 |
Foreign References:
| JP2007211862A | 2007-08-23 | |||
| JP2001003941A | 2001-01-09 | |||
| JP2008082348A | 2008-04-10 | |||
| JP2007051716A | 2007-03-01 | |||
| JP2005163882A | 2005-06-23 | |||
| JP2005003179A | 2005-01-06 |
Attorney, Agent or Firm:
SHIOJIMA, Toshiyuki (JP)
Toshiyuki Shiojima (JP)
Toshiyuki Shiojima (JP)
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