| 摘要 |
Quick-action clamping, for holding workpieces in machine tools, and the like, is developed via orbital movements of a clamp member as induced by relative rotation of the mated eccentric head portion of a cooperating special machine screw threadedly engaged with a suitable mount. In a simple and economical expression of the clamp in a highly-advantageous low-profile form, the bolt is adapted from a steel hex-socket button-head scap screw, by machining a cylindrical exterior to its head in a laterally-offset relation to the central longitudinal axis of the cap screw, and the eccentric head of that modified screw member is fitted within an accommodating cylindrical recess in a shallow brass nut-like clamp member having "flats" about its periphery. With the threaded end of the bolt received within a tapped hole of a mount, a mere half turn effected by an Allen wrench in turn develops maximum orbital motion of the clamp member and resulting lateral movements of the flats, any one of which may serve to press against and hold a nearby workpiece; equally rapid and convenient release is then achieved by reversing the turn of the bolt.
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