Circuit breaker and assembling structure of three-phase linkage transmission mechanism thereof

Abstract

The invention discloses a circuit breaker and an assembling structure of a three-phase linkage transmission mechanism thereof. The circuit breaker comprises a circuit breaker shell and a three-phase linkage transmission mechanism; the three-phase linkage transmission mechanism comprises a transmission shaft and a group of supporting plates fixed on the circuit breaker shell through bolts; an assembling hole used for assembling the transmission shaft and three connecting holes for respectively allowing the bolts to penetrate are arranged in the supporting plates; bolt holes corresponding to the connecting holes are arranged in the circuit breaker shell; the bolts are eccentric bolts; each eccentric bolt comprises a head part and a rod part eccentrically arranged on the head part; the internal diameter of the bolt hole is larger than the largest external diameter of the rod part; and the eccentric bolt further comprises a positioning column which is fixed on the rod part between the head part and the rod part and matched with the bolt hole when the rod part penetrates through the connecting hole. The circuit breaker with the structure provided by the invention can be used for solving the problem that the bolts cannot be connected due to deviation of the circuit breaker shell while the coaxiality of the assembling holes of the three supporting plates can be ensured, thus, the assembling of the supporting plates and the circuit breaker shell can be realized easily.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to the assembly of a three-phase linkage transmission mechanism of the circuit breaker. Background technique [0002] At present, in the three-phase linkage transmission mechanism of the domestic 35kVGIS circuit breaker, the three moving contacts are respectively connected to the transmission shaft through the crank arm, and the transmission shaft is fixed on the circuit breaker shell and arranged at intervals along the axial direction of the transmission shaft. Supported by a supporting plate, the fixing of the supporting plate and the circuit breaker housing is realized by bolt connection, therefore, there are assembly holes for the assembly of the transmission shaft on the supporting plate and three corresponding bolt holes on the circuit breaker housing respectively. The connection holes, the three connection holes on the support plate and the bolt holes on the circuit breaker housing are al...

AI Technical Summary

Problems solved by technology

When assembling, it is necessary to ensure the coaxiality of the assembly holes on the three support plates, otherwise the following situations will occur: 1. The friction between the transmission shaft and the support plate is large, and the characteristics of the transmission mechanism are difficult to adjust; 2. The transmission shaft The radial force received increases, which shortens the service life of the product; 3. Since the transmission mechanism belongs to the three-phase linkage mechanism, it causes the three-phase action to be out of sync

However, in the actual assembly process, due to the existence of assembly errors, there is a deviation between the connecting holes on the support plate and the bolt holes on the circuit breaker case, which will make assembly difficult, and bring a lot of debugging procedures to assembly production. Sometimes In order to complete the assembly, the coaxiality of the three assembly holes may even be sacrificed, and the assembly quality of the product cannot be guaranteed

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