Contact device of handcart circuit breaker and handcart circuit breaker

Abstract

The invention provides a handcart circuit breaker and a contact device thereof, and is used for solving the problem that the meshing force of the plum blossom contact is high and closing is affected. The contact device of the handcart circuit breaker comprises a contact arm and a moving contact. The contact finger base has a cylindrical structure, wherein the inner walls of the two axial ends are respectively provided with contact finger grooves, spring contact fingers are respectively arranged in the contact finger grooves at the two ends, and the spring contact fingers at the two ends are respectively used for insertion and connection of the contact arm and a static contact. The rear end of the contact finger base sleeves the front end of the contact arm. More than three supporting pins extending into the internal cavity of the contact finger base are arranged on the contact finger base. A positioning groove is arranged on the front end of the contact arm. The size of the positioning groove is larger than the size of the fitting end of the supporting pins in the axial direction of the contact arm. The diameter of the circle corresponding to the fitting end of each supporting pin is greater than the diameter of the circle corresponding to the groove bottom of each positioning groove. The contact finger base is floatably connected on the contact arm through the cooperation of the supporting pins and the positioning grooves. An elastic supporting structure for correcting the downward inclination of the front part of the contact finger base is arranged between the contact arm and the inner wall of the contact finger base.

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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