Title:
TENSION ADJUSTING DEVICE FOR AUXILIARY MACHINE DRIVING BELTS
Document Type and Number:
WIPO Patent Application WO/2005/059405
Kind Code:
A1
Abstract:
A tension adjusting device for auxiliary machine driving belts, adapted to preserve the seal property of a bearing in a good state for a long time, the bearing serving as the center of swing motion of a pulley arm supporting a tension pulley. A fulcrum shaft (6) is fixed by tightening a bolt (7) which is to be driven into an engine block (8). A tension pulley is rotatably supported by a pulley arm (2) supported for swing motion around the fulcrum shaft (6). The adjusting force of a hydraulic auto-tensioner is imparted to the pulley arm (2), thereby pressing the tension pulley against a belt (B). A washer (10) is incorporated between a boss (3) provided on the pulley arm (2) and the head (7a) of the bolt (7). The outer periphery of the washer (10) is provided with a cylindrical section (11) covering the end of the boss (3). A slinger (12) is attached to the end of the boss (3). A labyrinth (13) is formed between the slinger (12) and the cylindrical section (11) to prevent entry of muddy water and dust into the bearing which swingably supports the pulley arm (2).
Inventors:
TANAKA TADAHISA (JP)
Application Number:
PCT/JP2004/018818
Publication Date:
June 30, 2005
Filing Date:
December 16, 2004
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
TANAKA TADAHISA (JP)
TANAKA TADAHISA (JP)
International Classes:
F16C33/74; F16H7/08; F02B67/06; F16H7/12; (IPC1-7): F16H7/12
Foreign References:
| JPH10299846A | 1998-11-13 | |||
| JPH10306860A | 1998-11-17 | |||
| JPH0311154U | 1991-02-04 | |||
| JPH0552409U | 1993-07-13 | |||
| JPH0610645U | 1994-02-10 | |||
| JPH10169759A | 1998-06-26 |
Other References:
See also references of EP 1703169A4
Attorney, Agent or Firm:
Kamada, Bunji (Nipponbashi 1-chome Chuo-ku, Osaka-sh, Osaka 73, JP)
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