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Operating mechanism of minitype breaker

A technology for small circuit breakers and operating mechanisms, which is applied to the operation/release mechanism of protection switches, circuits, and parts of protection switches, etc., and can solve the problems of unstable bimetal action, large tripping force, and small lever arm. , to achieve the effect of easy control of the force, reducing the tripping force, and maintaining a stable force

Active Publication Date: 2012-04-25
SHANGHAI NOARK ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the relatively small lever arm of the existing operating mechanism, the final tripping force is relatively large, which will cause the bimetallic sheet of the delay system to be unstable.

Method used

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  • Operating mechanism of minitype breaker
  • Operating mechanism of minitype breaker
  • Operating mechanism of minitype breaker

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these specific implementations. Those skilled in the art will realize that the present invention covers all alternatives, modifications and equivalents as may be included within the scope of the claims.

[0029] refer to Figure 1-6 , an operating mechanism of a small circuit breaker, which is installed in the casing of the small circuit breaker, including a handle 1 rotatably installed in the casing, and the handle 1 is in contact with one end of a handle torsion spring 12, and the handle The other end of the torsion spring 12 is in contact with the housing;

[0030] A U-shaped connecting rod 11 is connected to the handle 1, and the other end 111 of the U-shaped connecting rod 11 is movably installed in the sliding groove 31 of the supporting lever 3, and the supporting lever 3 can be rotated around the first fixed shaft. 8 is rotat...

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Abstract

The invention relates to an operating mechanism of a minitype breaker. The operating mechanism includes a handle that can be rotatably installed in a housing. A U-shaped connecting rod is connected to the handle; the other end of the U-shaped connecting rod is movably arranged penetratedly into a sliding groove of a support lever. The support lever can be sleevedly installed on a first fixed shaft by rotating around the first fixed shaft and the first fixed shaft is fixed on the housing. A second fixed shaft is fixed on the support lever; a tension spring is connected on the second fixed shaft; and the tension spring is connected with a third fixed shaft that is fixed on the housing. A pin jump lever that is capable of rotating around the second fixed shaft is sleevedly installed on the second fixed shaft; one end of the pin jump lever is above the sliding groove; and the other end of the pin jump lever is in contact connection with one end of a latching lever. And the latching lever is rotatably sleevedly installed on the first fixed shaft and the other end of the latching lever is in contact connection with one end surface of the support lever. According to the invention, beneficial effects of the operating mechanism are as follows: the tripping arm force of the latching lever is increased; a tripping force can be effectively reduced; and the motion is stable.

Description

technical field [0001] The invention belongs to the field of low-voltage electrical appliances, in particular to an operating mechanism of a small circuit breaker. Background technique [0002] The miniature circuit breaker is the terminal equipment of the power distribution line. It has the characteristics of small size and modularization. It is mainly used for switching and protecting lines. At present, there are various types of operating mechanisms for miniature circuit breakers, and most of them use the force transmission between the connecting rods to realize the process of closing and separating the contacts, and the purpose of tripping is achieved by switching between the four-link and five-link operating mechanisms; It can realize the characteristics of small tripping force, fast breaking speed and comfortable operation. [0003] However, because the lever force arm of the existing operating mechanism is relatively small, the final tripping force is relatively larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/10
CPCH01H71/525
Inventor 严鹏斌邓彦军段育明
Owner SHANGHAI NOARK ELECTRIC
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