Jaw position and/or force detector for power chuck
First Claim
1. In a chuck having a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body, the improvement comprising:
- respective means on the chuck body including transducers connected to the jaws for generating a signal proportional to a parameter of the respective jaw;
signal-transmitting means on the chuck for transmitting the signals from the chuck body;
stationary signal-receiving means adjacent the chuck body for receiving the transmitted signals wholly without physical contact with the signal-transmitting means;
stationary energy-transmitting means adjacent the chuck body for transmitting energy; and
respective energy-receiving means on the chuck body for receiving the transmitted energy wholly without physical contact with the energy-transmitting means and for powering the signal-transmitting means therewith, said transducer being a force transducer and is braced between the respective jaw and the operator, each jaw having a radially inner part forming the respective workpiece-engaging face and a radially outer part coupled to the operator and limitedly radially displaceable relative to the respective inner part, the transducers being engaged generally between the parts.
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Accused Products
Abstract
A chuck has a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body. Respective transducers on the chuck body are connected to the jaws for generating a signal proportional to a parameter of the respective jaw. These signals are transmitted from the chuck body to a stationary signal receiver adjacent the chuck body wholly without physical contact with the signal transmitter. Similarly, a stationary energy transmitter adjacent the chuck body transmits energy and a receiver on the chuck body receives the transmitted energy wholly without physical contact with the energy transmitter and powers the signal transmitter therewith. The transducers can be position or force transducers, for instance constituted by strain gauges or linear potentiometers. The signal and energy transmitters and receivers are formed by coaxial coils carried on a fixed support and on the chuck.
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Citations
20 Claims
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1. In a chuck having a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body, the improvement comprising:
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respective means on the chuck body including transducers connected to the jaws for generating a signal proportional to a parameter of the respective jaw; signal-transmitting means on the chuck for transmitting the signals from the chuck body; stationary signal-receiving means adjacent the chuck body for receiving the transmitted signals wholly without physical contact with the signal-transmitting means; stationary energy-transmitting means adjacent the chuck body for transmitting energy; and respective energy-receiving means on the chuck body for receiving the transmitted energy wholly without physical contact with the energy-transmitting means and for powering the signal-transmitting means therewith, said transducer being a force transducer and is braced between the respective jaw and the operator, each jaw having a radially inner part forming the respective workpiece-engaging face and a radially outer part coupled to the operator and limitedly radially displaceable relative to the respective inner part, the transducers being engaged generally between the parts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14)
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12. In a chuck having a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body, the improvement comprising:
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respective means on the chuck body including transducers connected to the jaws for generating a signal proportional to a parameter of the respective jaw; signal-transmitting means on the chuck for transmitting the signals from the chuck body; stationary signal-receiving means adjacent the chuck body for receiving the transmitted signals wholly without physical contact with the signal-transmitting means; stationary energy-transmitting means adjacent the chuck body for transmitting energy; and respective energy-receiving means on the chuck body for receiving the transmitted energy wholly without physical contact with the energy-transmitting means and for powering the signal-transmitting means therewith, said transducer being a force transducer and is braced between the respective jaw and the operator, each jaw having an axially outer part forming the respective face, an axially inner part connected to the operator, and a bolt displaceable between an outer position interconnecting the respective parts radially and an inner position permitting relative radial displacement of the respective parts, the transducers being braced against the respective bolts. - View Dependent Claims (13, 15, 16, 17, 18, 19, 20)
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Specification