Torque limiting overload coupling

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Overload release coupling – Torque transmitted via a ball

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Details

192 56R, 464 38, F16D 706

Patent

active

046682066

ABSTRACT:
A torque limiting overload coupling for preventing an excessive load given to an output element from being reversely transferred to an input element which includes a plurality of paired balls, used as a rotation-transmitting connection between the input and output elements and which are held by the same number of holes extending through a ring plate fastened to the input element, held between a flange on the input element and a slider movable in the axial direction and slidably held on the input element. Each pair of balls has one ball engaged in a hole of the flange and the other ball engaged in a hole of the slider which is biased towards the flange by a compressive force of a spring attached to the rear side of the slider. In a space between the slider and the input element are a pair of parallel, trapezoidal cross-sectioned bars which form a tapered groove therebetween in which an intervener is received, the intervener formed from many sections of a ring having a wedge shaped cross-section. The intervener is pressed against the slider which in turn is pressed against the balls to hold the balls in the holes of the flange to effect transmission of rotation from the input element to the output element. When an excessive load is applied to the output element the balls force the slider away from the flange and thus the intervener between the paired bars and the torque limiter is left in a released condition.

REFERENCES:
patent: 3252303 (1966-05-01), Weasler et al.
patent: 3985213 (1976-10-01), Braggins
patent: 4262501 (1981-04-01), Vaughn et al.
patent: 4311224 (1982-01-01), Kato et al.
patent: 4373923 (1983-02-01), Kilwin

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