| 摘要 |
In a drive belt system, an idler pulley 6 is formed by an auto belt alignment pulley. For example, a pulley body 60 is rotatably carried on a hollow cylindrical shaft member 62 , a support rod 63 is inserted in the shaft member 62 , and the pulley body 60 and the shaft member 62 are connected to each other via a pin 64 (pivot axis C 2 ) for angular movement about the pin 64 . The pin 64 is inclined orthogonally to the shaft member 62 and forward in the direction of rotation of the pulley body 60 with respect to the direction of a radial shaft load L. With this configuration, when a flat belt 8 deviates to one side, the pulley body 60 inclines to create a level difference in the direction of the radial shaft load L and angularly moves orthogonally to the flat belt 8 , thereby correcting the deviation of the flat belt 8 . To fulfill the auto belt alignment function, belt span lengths Si and So between the idler pulley 6 and both the adjacent pulleys 3 and 4 are each set larger than the width of the flat belt 8.
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