Backlash correcting device for swivel arm of robot

Details Backlash correcting device for swivel arm of robot Backlash correcting device for swivel arm of robot

1985-01-30

1986-12-23

Dorner, Kenneth J.

Machine element or mechanism

Gearing

Backlash take-up

74440, F16H 5518

Patent

active

046304967

ABSTRACT:
A swivel shaft backlash correcting device for an arc welding robot in which backlash is eliminated, even if the gear teeth of the assembly are significantly worn. A spur gear is mounted at one end of a gear shaft, and an uprightly extending first pin is fixed to a flat part of the spur gear, the shaft being coupled through a speed reducer to an electric motor. A second pin is fixed to a flat part of a correcting gear having the same diameter and number of teeth as the spur gear and being mounted on the same shaft as the spur gear above the spur gear. A retaining ring is engaged with the first and second pins in one of a contracted or compressed state thereof so as to apply a force of expansion between the gear shaft and correcting gear. A center gear is secured to a stationary stand and engaged with the correcting gear and spur gear.

REFERENCES:
patent: 1197261 (1916-09-01), Burke
patent: 1539149 (1925-05-01), Thornburg
patent: 1608050 (1926-11-01), Bailey
patent: 1619799 (1927-03-01), Rounds et al.
patent: 2928288 (1960-03-01), Bliss et al.
patent: 2966806 (1961-01-01), Luning
patent: 3137181 (1964-06-01), Guilbert
patent: 3365973 (1968-01-01), Henden
patent: 3487706 (1970-01-01), Resener
patent: 4407544 (1983-10-01), Bahring
"18 Ways to Control Backlash in Gearing", Product Engineering, Oct. 26, 1959, p. 73, item 8.

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