| 摘要 |
A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about the axis of the hub. The groove of the pulley defines an annular bottom surface of the groove and a pair of spaced apart angled inside surfaces of the groove that join with the bottom surface and diverge away from each other as the angled surfaces extend away from the bottom surface. The angled surfaces are adapted to be engaged by opposed angled sides of the belt in such a manner that a bottom of the belt will be spaced from the bottom surface. The pulley has opposed outer sides. The pulley has at least one passage provided with an inlet interrupting one of the opposed outer sides adjacent the hub and an outlet interrupting the bottom surface of the peripheral groove whereby fluid passing through the passage from the inlet to the outlet thereof will tend to cool the pulley and the belt as the pulley rotates about its axis, the passage comprises a straight bore connecting the inlet and outlet and having a centerline, the bore being arranged such that upon extension of the centerline through the outlet it will intersect one of the angled surfaces in close proximity to the bottom surface. |
