| 摘要 |
Improvement in a V-belt tensioning means for tensioning a V-belt operative in respect to a pair of sheaves is disclosed said V-belt tensioning means comprising jack means constructed to be disposed and to be axially operative between said sheaves, said jack means having identical outer ends constructed to engage said sheaves, respectively, said jack means having screw thread means operative to change the length of said tensioning means so as to apply a tensioning force to spread said sheaves apart to tension said V-belt, said improvement comprising said identical outer ends constructed to engage the walls of the V-grooves of said sheaves by each said end comprising a pair of spaced apart cylindrical legs disposed in the same plane and at an obtuse included angle with respect to each other so that when said tensioning means is disposed and made to be axially operative between said sheaves the walls of the V-grooves thereof are engaged by said cylindrical legs to center and lock said tensioning means therebetween.
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