Mechanical pressing machine with means for cancelling load fluctuation torque
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United States of America Patent
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Aug 13, 1996
Grant Date -
N/A
app pub date -
Oct 25, 1994
filing date -
Oct 26, 1993
priority date (Note) -
Expired
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Abstract
In a mechanical pressing machine, a torque compensation plate cam is mounted on one end of a crankshaft, and a cam follower mounted on a distal end of a piston rod of a resilient force-producing device is held in pressing contact with the torque compensation plate cam so as to cancel a load fluctuation produced on the crankshaft. The resilient force-producing device employs a compression coil spring or an air spring. The crankshaft may be of the dual type, in which case a slider is supported by two connecting rods. With this construction, a periodic inertial load fluctuation, repeatedly produced for every revolution during the operation of the mechanical press, is compensated for by the system for reserving energy, and hence is cancelled, thereby balancing the energy, so that variations in rotation of the crankshaft are eliminated, thereby reducing vibrations and noises.
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