| 摘要 |
<p>A rotary drive arrangement for rotating a camshaft (13) so that the speed of rotation oscillates during a revolution of the camshaft comprises a driving sprocket wheel (19) driving a follower (1) mounted on a square-section shaft (4) driven by the sprocket wheel. The follower is slidable on the shaft (4) transversely of the axis of rotation of the sprocket wheel and is held in contact with a cam surface of a stationary hollow cam member. A pin (6) fixed to the follower (1) eccentrically of the axis of rotation is drivingly engaged in an aperture (15) in a drive arm (12) fixed to the camshaft, so that there is imparted to the camshaft a rotational motion which oscillates during a revolution of the driven member in accordance with the sliding motion of the follower resulting from its contact with the cam surface.</p> |
