| 摘要 |
There is disclosed a fluctuation torque cancellation apparatus which positively cancels a torque fluctuation developing on an input shaft or an output shaft of a motion conversion apparatus for converting a continuous rotational motion of the input shaft into a predetermined-type rotational motion (e.g. intermittent rotational motion) of the output shaft. A torque compensation cam 5, fixedly mounted on a rotation shaft 4, continuous rotates when the rotation shaft 4 rotate, and a cam surface, formed on a peripheral surface of the torque compensation cam 5, reciprocally moves a slider 7 in a cylinder 9 while rotating a cam follower 6. As a result, a coil spring 12, mounted within the cylinder 9, is compressed and expanded, so that a pressing force of the cam follower 6 against the torque compensation cam 5 is varied, thereby cancelling a fluctuation torque applied to the rotation shaft 4, thus effecting a torque compensation for the motion conversion apparatus 2. When it is desired to vary the torque compensation value, the air is supplied from an air source 16 to an air chamber 17 in the cylinder 9 to add a pressing force by the air, so that the compensation torque is exerted on the rotation shaft, using both of the spring pressure and the air pressure. <IMAGE> |
