Patent ID: 7678001
Filing Date: 2010-03-16
Classification: B21J,Y10T

Abstract:
1. An apparatus for an intermittent drive of a spindle for a workpiece fixture comprising: (a) a traction gear comprising a traction means guided endlessly about a driving wheel and a driven wheel; (b) a continuous rotary drive for continuously driving the wheel in a driving direction; and (c) a superposition drive for displacing the driven wheel in a rotary oscillating manner; wherein the superposition drive comprises a single support for the traction means, the support being connected to a rotary oscillating drive and displaceable in a rotary oscillating manner about an axis of the driven wheel, and two deflection rollers held on the single support for the traction means and moving synchronously towards and away from the driving wheel; wherein the driven wheel is rotated back and forth via the rotary oscillating drive so that the continuous rotary drive of the driving wheel is superimposed with rotary oscillations leading to intermittent driving of the driven wheel.