Tripping mechanism of circuit breaker

A technology of tripping mechanism and circuit breaker, which is applied in the direction of protection switch operation/release mechanism, etc. It can solve the problems of large tripping force, insensitive tripping mechanism, unreliable operation of circuit breaker, etc., and achieve reliable operation and high tripping force. small effect

Active Publication Date: 2011-05-11
SHANGHAI YONGJI ELECTRICAL HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the Chinese utility model patent ZL200620165140.5 discloses such a "circuit breaker tripping release". In the process, the force generated by the bimetal or the electromagnet may not be enough to push the drawbar to rotate, resulting in insensitive tripping mechanism and unreliable operation of the circuit breaker.

Method used

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  • Tripping mechanism of circuit breaker
  • Tripping mechanism of circuit breaker
  • Tripping mechanism of circuit breaker

Examples

Experimental program
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Effect test

Embodiment Construction

[0013] Such as figure 1 , figure 2 As shown, the tripping mechanism of the present invention includes a draw bar 1, which can rotate around a shaft 9, and two rotating arms 11, 12 protrude outward from the draw bar 1.

[0014] The middle part of the lever member 5 is rotatably mounted on the first rotating shaft 8, and one end 51 of the lever member 5 leans against the rotating arm 11 of the drawbar, and the first spring 2 is pressed on the lever member 5, so that the end of the lever member Part 51 keeps in contact with the pivoted arm 11 on the drawbar, and pivoted arm 11 supports the lever member 5 from below to keep it balanced. In this embodiment, the first spring 2 is a compression spring. Obviously, if the first spring 2 is a torsion spring installed on the first rotating shaft 8, the same effect can also be achieved. The other end of the lever member 5 is provided with a catch hook 52 .

[0015] The energy storage part 3 is rotatably installed on the second rotatin...

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PUM

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Abstract

The invention discloses a tripping mechanism of a circuit breaker, which comprises a traction rod and a locking piece, wherein, the traction rod comprises at least one rotating arm, a lever part, a first spring, an energy accumulation part and a second spring; wherein, the one end of the lever part leans against the rotating arm on the traction rod, the other end thereof is provided with a stop hook, and the middle part is provided with a first rotating shaft; the first spring acts on the lever part to lead the lever part to lean against the rotating arm on the traction rod; the energy accumulation part is rotatablely installed on a second rotating shaft, a locking arm and a trigger arm are arranged on the energy accumulation part, the end part of the locking arm is connected with the stop hook on the lever part in a hanging way, and the trigger arm can be contacted with the locking piece; the second spring acts on the energy accumulation part to lead the end part of the locking arm to cling to the stop hook. The disengaging force needed by the tripping mechanism is less, and the action of the circuit breaker can be ensured to be reliable.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a tripping mechanism of the circuit breaker. Background technique [0002] There is a tripping mechanism in the circuit breaker, and its function is to perform delayed tripping when an overload current occurs in the circuit; or to perform instantaneous tripping when a short-circuit current occurs in the circuit to trip the circuit breaker to achieve circuit protection. The tripping mechanism includes a pull rod that can be rotated. The delay tripping action is generally driven by a bimetallic strip. The overload current causes the bimetallic strip to heat and deform. The deformation force can push the drawbar to rotate, and then push the operating mechanism to release. The buckle; the instantaneous release is generally driven by an electromagnet to rotate the drawbar. [0003] However, in the existing circuit breaker, the drawbar often directly acts on the locking part, and when the drawing...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01H71/10H01H71/40
Inventor张晓敏张敏海
OwnerSHANGHAI YONGJI ELECTRICAL HLDG