| 摘要 |
An apparatus (10) for imparting tension to multiple strands of an endless power transferring member loop (12) encircling a drive sprocket (14) and at least one driven sprocket (16a, 16b). Two tensioning arms (18a, 18b) are spaced apart and have guided movement relative to at least one fixed pin (26), and support inwardly facing shoes (20a, 20b) with power-transferring-member-sliding faces (22a, 22b). A link assembly (60) includes at least two link members (32a, 32b) pivotally connected to one another at respective first ends (40a, 40b). The connected first ends (40a, 40b) are constrained for limited movement along a fixed slot (36) extending generally along a centerline of the power transferring member loop (12) between the drive sprocket (14) and the driven sprockets (16a, 16b). The link members (32a, 32b) are pivotally connected individually to opposite ends of the two spaced apart tensioning arms (18a, 18b) at second locations (42a, 42b). |
| 主权项 |
1. A tensioning system for imparting tension to an endless loop power transferring member encircling a drive sprocket and at least one driven sprocket comprising:
a pair of tensioning arms, each tensioning arm having an arm movement guide mechanism, a link pivot and a shoe with a power-transferring-member-sliding face; at least two link members, each link member having a first end and a second end, each second end connected to corresponding link pivots of the pair of tensioning arms; a rigidly fixed body defining a slot with outer ends extending generally between the drive sprocket and at least one driven sprocket, the fixed body located inside of the endless loop power transferring member; a free moving pin retained in the slot of the fixed body and pivotally constrained to each first end of the corresponding link members for limiting motion of each first end to be defined by the slot; and a tension driver for driving the pair of tensioning arms relative to one another. |
