Rotating table positioning device with minimum backlash

Details Rotating table positioning device with minimum backlash Rotating table positioning device with minimum backlash

B - Operations, Transporting

23

Q

74/213, 269/32

B23Q 3/18 (2006.01) B23Q 1/54 (2006.01) B23Q 5/56 (2006.01)

Patent

CA 1158267

ABSTRACT A motor-driven rotating table positioning device has a bullgear engaged by two pinions each driven by the high-efficiency worm and gear set. These two worm and gear sets are connected by a coupling shaft and an adjustable coupling which allows a desired torsion to be maintained in the coupling shaft thereby eliminating any table backlash caused by the bullgear, pinions and high-efficiency worm and gear sets. For safety in the event of motor failure, the motor is coupled to the coupling shaft by a low-efficiency or self-locking worm and gear set.

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