| 摘要 |
A tensioning device (10) for a conventional drive system, which includes pulleys (not shown) interconnected by a flexible drive element (12), includes a frame assembly (20), upper left and right contact rollers (22) and (24), and lower left and right contact rollers (26) and (28). The frame assembly (20) includes proximal and distal frame sidewalls (38) and (40) which are rectangular in shape. Each contact roller (22), (24), (26), and (28) engages the flexible drive element (12) and forms a U-shaped channel (30) with a bottom circumferential surface (22) and vertical sidewalls (34). The contact rollers (22), (24), (26), and (28) rotatably attach to bearing axles (72), (74), (76), and (78) which connect the contact rollers to the frame sidewalls through their respective positional locating apertures (42), (44), (46), and (48). The bearing axles of the contact rollers can also be selectively secured to the frame sidewalls through horizontal adjustment apertures (52), (54), (56), and (58) to adjustably secure the upper contact rollers (22) and (24) a selected distance from one another, and adjustably secure the lower contact rollers (26) and (28) a selected distance from one another, thereby optimizing the locations in which the tensioning device (10) applies biasing force to the drive belt (12). The bearing axles (72), (74), (76), and (78) of the contact rollers (22), (24), (26), and (28) can also be connected to the frame sidewalls (38) and (40) through the vertical adjustment apertures (62), (<BOL
|
