Apparatus for actuating the clamping jaws of a chuck
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United States of America Patent
Stats
-
Aug 28, 1990
Grant Date -
N/A
app pub date -
Oct 28, 1988
filing date -
Nov 3, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for actuating clamping jaws of a chuck via an adjustment member that, to produce a rotational adjustment movement, is drivingly connected with an actuator formed from a reversible drive motor and a subsequent gear mechanism that is drivingly connected to the output side of the motor via a torque coupling. The gear mechanism is embodied as a two-stage synchronized gear in the form of a transmission gear drive having central gears that are rotatably mounted within one another and are drivingly connected via a step-type gearing to a drive member of the chuck and to the adjustment member. The central gears are drivingly and synchronously coupled via two transmission gears fixedly disposed on a transmission shaft that is rotatable about the central gears and engages the torque coupling in a load-dependent manner. The reduction stages of the transmission gear drive correspond to transmission stages of the step-type gearing.
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