Anti-overheating electrical dynamic contact and structure thereof

Abstract

The invention provides an anti-overheating electrical dynamic contact and a structure thereof, and belongs to the technical field of electrical switches. The anti-overheating electrical dynamic contact comprises moving parts, supporting parts and fixing shafts. The moving parts and the supporting parts are provided with shaft holes, the fixing shafts penetrate through the shaft holes to enable the moving parts and the supporting parts to be connected together after the moving parts and the supporting parts are stacked, and the moving parts and the supporting parts are in close contact through upper faces and lower faces. The dynamic contact can be suitable for static contacts of different thicknesses through the rotation angles of the moving parts, the dynamic contact can be tightly attached to the static contacts through planes, the effective contact area is greatly increased, the phenomena of heating and arcing caused by bad contact are reduced, and the ablation probability of the contact is lowered. Moreover, each moving part is provided with four working faces for standby application mutually, and the through-current capability is improved by overlaying metal sheets of the contact. The anti-overheating electrical dynamic contact has the advantages of being simple in structure, low in cost, high in applicability, good in safety, high in reliability, simple in technology, capable of being widely applied to electrical equipment and measuring equipment such as a disconnecting switch, a pincerlike clamping mechanism and a withdrawable circuit breaker, and the like.

Description

technical field [0001] The invention relates to an electrical switch contact, in particular to a movable contact of an electrical switch capable of preventing overheating and its structure. It belongs to the technical field of electrical switches. Background technique [0002] Because plug-in circuit breakers, isolating switches, electrical equipment and clamping mechanisms of measuring equipment do not have arc extinguishing functions, they should be strictly prevented from heating and causing more serious faults such as arcing when used. The current electrical dynamic contacts are of integral structure. Since the static contacts to be connected have different thicknesses, the contact part of the dynamic contact and the static contact generally adopts an arc structure, so only one line between the two contacts can be maintained. The contact surface is prone to heating and arcing. At the same time, once the contact is worn or ablated, it is difficult to quickly find a spar...

AI Technical Summary

Problems solved by technology

The current electrical dynamic contacts are of integral structure. Since the static contacts to be connected have different thicknesses, the contact part of the dynamic contact and the static contact generally adopts an arc structure, so only one line between the two contacts can be maintained. contact surface, prone to heating and arcing

At the same time, once the contact is worn or ablated, it is difficult to quickly find a spare in a short time, and the rapid recovery of the contact is limited.

[0003] At this stage, the application technology in this field is still unable to solve the problems of temperature rise at the contact point caused by mechanical vibration, contact arc ablation, etc., and the problem that it is difficult to recover in a short time once a fault occurs

At present, there are very few domestic patents on this aspect. The Chinese patent "Bridge-type contact device for universal circuit breaker drawer seat" (application number: 201320543033.1) proposes to use bridge-type contacts to replace traditional circuit breaker contacts, and the mechanism is complicated. , although the problem of severe mechanical wear is partially solved, it does not fundamentally solve the problem of the contact surface, as well as the resulting oxidation of the contact, local welding of the contact, generation of sparks and even arc discharge, etc., its safety and reliability and durability can be improved

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