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Reset spring and stationary contact device using same

A return spring and static contact technology, which is applied in the field of return spring and static contact devices, can solve problems such as unstable force changes and static contact finger stress mutations, etc., to improve deformation strength, reduce stress, and beautiful product appearance Effect

Active Publication Date: 2014-11-19
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a return spring to solve the problem that the spring ring in the prior art exerts an unstable force on the static contact finger in the axial direction of the static contact finger, and it is easy to form a sudden change in stress inside the static contact finger. technical problem; at the same time, the present invention also provides a static contact device using the return spring

Method used

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  • Reset spring and stationary contact device using same
  • Reset spring and stationary contact device using same
  • Reset spring and stationary contact device using same

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] Such as Figure 1 to Figure 5 As shown, an embodiment of a static contact device, the static contact device in this embodiment includes a static contact body and an elastic static contact finger 100 with one end fixed on the static contact body, the elastic static contact finger 100 A return spring 200 is set on the outer side of the circumferential direction, and the return spring 200 here is a snake-shaped spring sleeve formed by bending and folding a spring wire 10 alternately in forward and reverse directions and welding the end and tail of the spring wire 10. The cross-section is circular, and the wire segment corresponding to the axial end of the serpentine spring sleeve on the spring wire 10 is the first curved segment 11, and the wire segment corresponding to the other axial end of the serpentine spring sleeve is the second curved segment 12. The curved section 11 and the second curved section 12 are U-shaped, and the wire section 13 between the first and second...

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Abstract

The invention discloses a reset spring and a stationary contact device using the same. The stationary contact device comprises an elastic stationary contact finger. The outer side in a circumferential direction of the elastic stationary contact finger is provided with a reset spring. The reset spring is a serpentine spring pocket formed by bending and folding one or more spring wires alternatively in positive and negative directions and connecting heads and tails of the spring wires. Two axial ends of the serpentine spring pocket both close up inward, and the central portion bulges outward. Stopper stairs matching the two ends of the serpentine spring pocket in a stopping and limiting manner are respectively disposed on the periphery surface at corresponding positions on the elastic stationary contact finger to the two axial ends of the serpentine spring pocket. The central portion of the serpentine spring pocket and the periphery surface of the elastic stationary contact finger form a deformation gap. An acting force of the serpentine spring pocket on the elastic stationary contact finger changes uniformly along the axial direction of the serpentine spring pocket, internal stress of the elastic stationary contact finger changes less, and the service life of the stationary contact finger can be effectively extended.

Description

technical field [0001] The invention relates to a return spring and a static contact device using the return spring. Background technique [0002] In the field of high-voltage electrical appliances, the electric switch is equipped with corresponding moving contacts and static contacts that are mated and disengaged to control the conduction and disconnection of the switch. The contact finger exerts force to ensure the effective conduction between the static contact and the moving contact. [0003] A Chinese utility model patent with the authorized notification number CN202373467U discloses a static contact device. The static contact device is wrapped by a static contact body, and a spring is provided on the outer peripheral surface of the end of the static contact body facing the moving contact. In the spring groove, there are a plurality of petal-shaped static contact fingers evenly distributed around the spring groove. On the outer peripheral surface of the static contact ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/44
Inventor 王路平韩丽娟李宏楼郝留成林生军
Owner STATE GRID CORP OF CHINA
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