Contact device of handcart circuit breaker and handcart circuit breaker

Abstract

The invention provides a handcart circuit breaker and a contact device thereof, which are used to solve the problem that the large contact force of the plum blossom contact affects closing. The contact device of the handcart circuit breaker includes a contact arm and a moving contact; the contact finger seat is a cylindrical structure, and the inner walls of the two axial ends are respectively provided with contact finger grooves, and spring contact fingers are respectively arranged in the contact finger grooves at both ends. , the spring contacts at both ends are respectively used for plugging the contact arm and the static contact; the rear end of the contact finger seat is sleeved on the front end of the contact arm, and the contact finger seat is provided with more than three supports extending into the inner cavity of the contact finger seat The pin is provided with a positioning groove on the front end of the contact arm; in the axial direction of the contact arm, the size of the positioning groove is larger than the size of the matching end of the supporting pin; the diameter of the circle corresponding to the matching end of each supporting pin is larger than the groove of each positioning groove The diameter of the circle corresponding to the bottom; the contact finger seat can be floatingly connected to the contact arm through the cooperation of the support pin and the positioning groove; the elastic support for correcting the downward inclination of the front part of the contact finger seat is provided between the contact arm and the inner wall of the contact finger seat structure.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a contact device of a handcart circuit breaker and the handcart circuit breaker. Background technique [0002] The handcart circuit breaker is a switchgear that is often used in the prior art. Its structure, such as the circuit breaker disclosed in the documents with the authorization announcement number CN208045397U and the application publication number CN107622922A, mainly includes a chassis car and a solid body mounted on the chassis car. For the sealed pole, a contact arm is arranged on the side of the solid-sealed pole, and a plum blossom contact is connected to the contact arm. [0003] The plum blossom contact structure in the prior art is as figure 1 As shown, the plum-blossom contact 10 includes a plum-blossom contact body 11 and a spring installed on the plum-blossom contact body 11, the plum-blossom contact body 11 includes evenly distributed plum-blossom co...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a contact device of a handcart circuit breaker, which is used to solve the problem in the prior art that the contact force of the plum blossom contact is large and affects the closing action; another purpose of the present invention is to provide a contact device using the contact The handcart circuit breaker with the head device has the advantages of small closing resistance and stable closing action

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