A self-locking structure after the moving contact of a circuit breaker is repelled

A technology of self-locking structure and moving contact, applied in the directions of circuit breaker contacts, circuit breaker parts, etc., can solve the problems of increasing production cost of mold opening, complex self-locking structure, etc., achieving simple structure, speeding up arc extinguishing, saving energy The effect of production costs

Active Publication Date: 2017-10-31
XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The contacts all have a self-locking structure after repelling. However, the self-locking structure after the contacts are repelled is relatively complicated, which increases the cost of production and mold opening. This case arises from this

Method used

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  • A self-locking structure after the moving contact of a circuit breaker is repelled
  • A self-locking structure after the moving contact of a circuit breaker is repelled
  • A self-locking structure after the moving contact of a circuit breaker is repelled

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] refer to Figure 1 to Figure 7 As shown, the self-locking structure of a moving contact of a circuit breaker disclosed by the present invention includes a contact bracket 1 , a moving contact 2 , a push rod 3 and a compression spring 4 .

[0032] The moving contact 2 is pivotally connected to the contact bracket 1. In this embodiment, the contact bracket 1 is provided with a rotating shaft 11, and the moving contact 2 is provided with a rotating hole 21. The rotating shaft 11 is inserted into the rotating hole 21, so that the moving contact 2 is pivotally connected in the contact bracket 1, and the movable contact 2 can swing freely relative to the contact bracket 1.

[0033] A groove 22 is provided on the movable contact 2, the groove 22 is preferably an arc-shaped groove 22, and may be a groove 22 of other structures. The arc-shape...

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PUM

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Abstract

The invention discloses a self-locking structure after dismounting of moving contacts of a circuit breaker. The self-locking structure comprises contact supports, the moving contacts, push rods and compression springs. The moving contacts are pivoted in the contact support, and grooves are formed in the moving contacts. The push rods are movably arranged in the contact supports, one end of each push rod is in matched with the corresponding groove in a contact mode, the other end of each push rod is connected with one end of the corresponding compression spring, the other end of each compression spring is connected with the corresponding contact support, and the compression springs always provide power for the push rods. The self-locking structure after dismounting of moving contacts of the circuit breaker can effectively avoid secondary contact of the moving contacts, increase the clearance between the open contacts and accelerate arc extinguish, and is simple in structure so as to save the production cost.

Description

technical field [0001] The invention relates to the technical field of molded case circuit breakers, in particular to a self-locking structure of a circuit breaker after a movable contact is repelled. Background technique [0002] In the prior art, the moving contact of the circuit breaker is generally provided with a self-locking structure after the moving contact is repelled, and the larger opening distance is repelled under the electrodynamic force generated by the large current, and the moving contact is kept at the larger distance. Open distance position to prevent secondary contact of moving contacts, at the same time, increase contact open distance to speed up arc extinguishing. [0003] For example, the publication number is CN101826426A, which discloses a contact locking device for a single breakpoint plastic case low-voltage circuit breaker, including a moving contact and a rotating shaft. The rotating shaft has a cavity, and the rotating end of the moving contact ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/04
CPCH01H73/04
Inventor 林观锏卓江海
Owner XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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