A shaft seat of an air circuit breaker

Abstract

The invention discloses a rotary shaft seat of an air circuit breaker. The rotary shaft seat comprises a fixed plate, a lead screw, a drag plate and a locking mechanism. The lead screw comprises an operation end and a threaded segment, the lead screw is in threaded connection with the drag plate through the threaded segment, the fixed plate is arranged between the operation end and the threaded segment, and the lead screw is fixedly hinged to the fixed plate. The rotary shaft seat is technically characterized in that the locking mechanism comprises a locking piece and a locking rod arranged parallel to the lead screw, the locking rod is fixedly hinged to the fixed plate, and a protruding block is arranged on the locking rod; the locking rod is hinged to the fixed plate, a spiral groove is formed in the locking rod in the circumferential direction, and a transmission protrusion is arranged on the drag plate and is embedded in the spiral groove; the lead screw is sleeved with the locking piece, a spring is arranged between the locking piece and the fixed plate, a clamping groove matched with the protruding block is formed in the locking piece, and the open direction of the clamping groove is opposite to the direction of the spring. The rotary shaft seat of the air circuit breaker is timely in transmission, convenient to mount, small in occupied space, low in cost, safe and reliable.

Description

Technical field [0001] The invention relates to an air circuit breaker circuit breaker accessory, in particular to an air circuit breaker transmission mechanism. Background technique [0002] The rotating shaft seat is a mechanism used to control the working state of the air circuit breaker. The external switch or knob is operated through a certain mechanical structure to control the opening and closing of the contacts inside the air circuit breaker. [0003] In the prior art, an application number CN200920048503.0 in the Chinese New Type Patent Publication Specification discloses a self-locking drawer seat of a power equipment circuit breaker, which includes a face shield installed on the front of the circuit breaker body and a handle Extend into the mask connecting shaft, the gear is fixed on the shaft, the gear on the shaft meshes with the gear, a card board is arranged behind the mask, the slide plate) is installed in the middle of the guide rail on the circuit breaker body, th...

AI Technical Summary

Problems solved by technology

[0004] The mechanical device for controlling the working state of the circuit breaker provided in this utility model specifically uses multiple gears as the transmission device in the mechanical device. However, the gear transmission requires high manufacturing and installation accuracy and is not suitable for long-distance between two shafts. Transmission, in long-distance transmission, the tooth diameter of the gear will occupy a considerable space and manufacturing cost, so the structure of the mechanical device in the above-mentioned utility model must be designed very compactly, but there are many control elements in the circuit breaker. It is not suitable for large-scale circuit breakers. The above-mentioned utility model also has the defect that it cannot prevent misoperation. As we all know, circuit breakers are widely used in circuit protection systems, as long as they are used to control the opening and closing state of the circuit, and if the operating mechanism of the circuit breaker Without one-way limit energy, it is very likely to cause misoperation and dangerous accidents

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