Fluctuation torque cancellation apparatus
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United States of America Patent
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-
Dec 14, 1999
Grant Date -
N/A
app pub date -
Apr 17, 1997
filing date -
Apr 19, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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, such as intermittent rotational motions of the output shaft, and includes a torque compensation cam, fixedly mounted on a rotation shaft for rotation therewith and has a cam surface, formed on a peripheral surface which reciprocally moves a slider in a cylinder while rotating a cam follower and with a coil spring, mounted within the cylinder, being compressed and expanded, so that the magnitude of pressing force of the cam follower against the torque compensation cam is varied, thereby cancelling a fluctuation torque applied to the rotation shaft, thus effecting a torque compensation for the motion conversion apparatus and including a source of pressurized air supplied to an air chamber in the cylinder to selectively vary the pressing force, so that the compensation torque is exerted on the rotation shaft, using both the spring pressure and the air pressure.
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