| 摘要 |
A screw feed and driver assembly which may constitute a part of a screw driving tool of the type having a prime mover, a speed and torque determining gear assembly and a clutch; which can constitute an accessory for a clutch containing manual feed power screw driver; and which, combined with a clutch, can comprise an accessory for a standard manual power drill. The screw feed and driver assembly comprises a feed housing with a slide body mounted therein and shiftable between forward and rearward positions. The slide body is biased to its forward position. The slide body receives a strip bearing screws. A contact foot is mounted on the slide body and shifts the slide body rearwardly when pressed against a workpiece. A screw driver, affixed to the clutch, extends into the slide body. The slide body contains a pawl and feed sprocket assembly. The sprocket engages notches in one edge of the screw bearing strip. When the slide body is shifted rearwardly by the contact foot, the pawl rotates the sprocket a predetermined amount to advance the forwardmost screw of the strip to a driving position. Further rearward movement of the slide body engages a driver with the forwardmost screw and thereafter actuates the clutch to drive the forwardmost screw. The mounting of the contact foot on the slide body can be adjusted to accommodate different length screws. An adjustable stop block determines the rearwardmost position of the slide body and the depth to which the screws are driven. An improved clutch mechanism substantially eliminates clutch chatter.
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