Ball-clamping device with rotary pneumatic feed-through

摘要

The ball clamping apparatus (1) has two bearing sockets (6,7) which are arranged with a ball (2) fastened with assembly object (5), relatively moved by an actuator (10). A relief arm (13) of force-generating unit (22) is rotatably mounted at pivot bearing (12) with respect to attack point (3) of ball so as to compensate rotational torque exerted by the assembly object on the ball. The pivot bearing is attached with a sealed rotary joint chamber (32) by a rotary joint (31). The fluid passages (33,34) are arranged in the relief arm for extending with respect to the ball.