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A shaft 10 containing spring loaded hex wrench 9 is coupled to a motor 11 which functions in conjunction with a breaker bar 12 to loosen and spin off screws.
English (United States)
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Torque Breaker/screw Driver
A shaft 10 containing spring loaded hex wrench 9 is coupled to a motor 11
which functions in conjunction with a breaker bar 12 to loosen and spin off
The operation of the breaker bar is analogous to a rachet mechanism. An
overrunning clutch device 13 is used for transmitting torque between the shaft 10
and breaker bar 12 in one direction, while allowing free overrun in the opposite
direction. For automatic screw removal, the hex wrench 9 is positioned under a
screw to compress the spring 14. The motor 11 slowly rotates counterclockwise
until the wrench 9 is forced into the hex screw cavity. Sensing this, the breaker
bar 12 is rotated counterclockwise through a fixed angle thereby breaking the
torque hol the screw. Once the angle is reached, the motor 11 spins free of the
breaker arm 12 and removes the screw.