| 摘要 |
A rotary clamp having a telescopic piston rod with predetermined adjustable lengths corresponding to predetermined rotational angles of a clamp arm. The rotary clamp utilizes a linear actuator for transmitting linear motion to the piston rods and a linkage assembly is connected to the piston rod to convert the linear motion of the piston rod into rotary motion of the clamp arm. The telescopic piston rod provides an outer shaft and an inner shaft wherein the outer shaft is connected to a piston in the linear actuator. The outer shaft also provides a bore extending from the free end of the outer shaft for receiving an inner shaft of the piston rod. The inner shaft of the piston rod has a plurality of apertures extending transverse to and spaced along the longitudinal axis of the inner shaft. The apertures of the inner shaft may correspondingly align with an aperture provided in the outer shaft. A pin is inserted through correspondingly aligned apertures of the inner shaft and the outer shaft to provide a predetermined length of the piston rod which in turn corresponds to a predetermined rotational angle of the clamp arm.
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