Operating mechanism for molded case circuit breaker

A technology of molded case circuit breaker and operating mechanism, which is applied in the direction of protection switch operation/release mechanism, etc., to achieve the effect of improving service life, reducing manufacturing cost, and accelerating breaking speed

Active Publication Date: 2011-04-27
SHANGHAI LIANGXIN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no product with this structure on the market

Method used

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  • Operating mechanism for molded case circuit breaker
  • Operating mechanism for molded case circuit breaker
  • Operating mechanism for molded case circuit breaker

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Embodiment Construction

[0021] like figure 1 , figure 2 As shown, the operating mechanism of the molded case circuit breaker includes a handle 1, a main tension spring 2, a bracket 3, a jumper 4, a lock 5, a re-buckle 6, an upper link 7, a lower link 8 and a moving contact system 9, Wherein, the buckle 5 and the buckle 6 are respectively installed between the brackets 3 through a pin shaft. A pin 41 is fixed on the jumper 4, and the upper end of the upper connecting rod 7 is rotatably connected to the pin 41, and the lower end of the upper connecting rod 7 is connected to the upper end of the lower connecting rod 8 by a connecting rod shaft 13. Hinged, the lower end of the lower link 8 is connected with the moving contact system 9. The upper end of the main tension spring 2 is hung on the handle 1, and the lower end of the main tension spring 2 is hung on the connecting rod shaft 13. The operating mechanism has three states during the working process of the circuit breaker: closing state, opening...

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PUM

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Abstract

The invention discloses an operating mechanism for a molded case circuit breaker, which comprises a handle, main tension springs, a bracket, a latch, a secondary buckle, an upper connecting rod, a lower connecting rod, a moving contact system and an accelerating breaking device. The accelerating breaking device comprises a tripper, a tripper rotating shaft and an energy storage spring, wherein the tripper is arranged on the tripper rotating shaft in a rotating way; the two ends of the tripper rotating shaft are fixed on the bracket; and one end of the energy storage spring is fixed, and the other end of the energy storage spring is connected to the tripper. When the circuit breaker is freely tripped, the energy storage spring can increase the rotating speed of the tripper to further increase the breaking speed of the whole mechanism. In switching-in and switching-off processes, as the tripper is buckled by the latch, the acting force of the energy storage spring may not increase the operating force of the handle in the switching-in and switching-off of the circuit breaker. In the operating mechanism, the breaking speed can be increased under the condition of not increasing the rigidity of the main tension springs, so the manufacturing cost of the operating mechanism is reduced and the service life of the operating mechanism is prolonged.

Description

technical field [0001] The present invention relates to a low-voltage molded case circuit breaker, and more specifically, to an operating mechanism in a low-voltage molded case circuit breaker. Background technique [0002] As an important part of the molded case circuit breaker, the operating mechanism of the molded case circuit breaker has always been the focus of analysis and research by major circuit breaker manufacturers. The basic principles and main structures of the operating mechanism are well known in the industry. Users continue to put forward higher requirements for the performance of circuit breakers, such as more reliable breaking capacity and lighter operation methods. Therefore, all circuit breaker manufacturers are constantly optimizing the circuit breaker mechanism to improve the circuit breaker mechanism. breaking speed. [0003] In the prior art, the circuit breaker operating mechanism mainly increases the breaking speed of the circuit breaker by increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/10
Inventor 黄银芳刘长友林广天李生爱全学辉
Owner SHANGHAI LIANGXIN ELECTRICAL
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