| 摘要 |
Disclosed is a belt tensioning system having a lever, an idler pulley attached to the lever and contacting a belt, and a fluid cylinder acting on the lever for belt tensioning. In the invention, the cylinder applies a force to the lever through a first moment arm and the pulley applies tensioning force to a belt through a second moment arm. Because of the unique arrangement, the tensioning force applied to the belt is substantially constant, notwithstanding that the lengths of the moment arms change with changes in lever position as the length of the belt changes.
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