| 摘要 |
This invention pertains to an impact wrench mechanism and a clutch therefor, wherein a motor having an output shaft rotatably drives a carrier member mounted on an axis. Anvil jaw(s) rotatably and coaxially mounted adjacent the carrier member have impact jaw(s) extending radially therefrom. Hammer member(s) having impact jaw(s) for impacting with the anvil jaw(s) is (are) mounted on the carrier member for rotation therewith and for limited linear motion relative thereto in a direction essentially transverse to the axis of rotation to allow the hammer member impact jaw(s) to contact the anvil jaw(s). The line of force of the impact blow has a force component tending to urge the hammer member(s) out of engagement with the anvil jaw(s), but the hammer member(s) have a mass and a mass center location such that linear inertial force is created which prevents motion of the hammer member(s) during the impact blow.
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