Adjustable opening spring mechanism for circuit breaker

Abstract

The invention discloses an adjustable opening spring mechanism for a circuit breaker, which comprises a circuit breaker case, a crank arm with a central fulcrum rotatably fixed on the circuit breakercase, and an opening spring with two ends connected to one end of the crank arm and the circuit breaker case respectively. The upper end of the opening spring is rotatably connected with one end of the crank arm, the lower end of the opening spring is fixed to a hanging block, a positioning plate is fixedly arranged on the bottom face of the circuit breaker case, and a lower transmission pin is movably installed on the positioning plate and arranged in the direction perpendicular to the opening spring; a plurality of adjusting gaskets and a long bolt are additionally arranged, and one end of ascrew rod of the long bolt sequentially penetrates through the through hole of the lower transmission pin and the center holes of the adjusting gaskets and then is fixedly connected with the hangingblock through threads. The stretching amount of the opening spring can be conveniently adjusted to adjust the force value of the spring, so that the action speed is adjusted; and the axial torsion inthe moving process of the opening spring can be released through the positioning pin, so that the opening spring is kept linear, the elastic loss is reduced, and the mechanical service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of circuit breaker equipment, and in particular relates to an adjustable opening spring mechanism for a circuit breaker. Background technique [0002] The opening spring of the existing circuit breaker, its upper and lower ends are respectively fixed in the transmission crank arm and the box body of the circuit breaker, two or more positioning holes are arranged on the connecting block fixed at the lower end of the opening spring, through Choose different positioning holes to determine the force value of the opening spring during installation, or adjust the force value by adjusting the amount of connection between the opening spring and the hanging plate, which cannot be adjusted linearly continuously, the adjustment accuracy is not high and the range is limited, and once installed Then it is difficult to adjust the force value of the opening spring. If the force value of the opening spring cannot meet the u...

AI Technical Summary

Problems solved by technology

[0002] The opening spring of the existing circuit breaker, its upper and lower ends are respectively fixed in the transmission crank arm and the box body of the circuit breaker, two or more positioning holes are arranged on the connecting block fixed at the lower end of the opening spring, through Choose different positioning holes to determine the force value of the opening spring during installation, or adjust the force value by adjusting the amount of connection between the opening spring and the hanging plate, which cannot be adjusted linearly continuously, the adjustment accuracy is not high and the range is limited, and once installed It is difficult to adjust the force value of the opening spring. If the force value of the opening spring cannot meet the needs of use, many parts need to be removed to replace it, which is very inconvenient to adjust.

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