CN88200749U

CN88200749U - Double-bridge type contact saving silver and copper

Info

Publication number: CN88200749U
Application number: CN198888200749U
Authority: CN
Inventors: 宁从志
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-01-21
Filing date: 1988-01-21
Publication date: 1988-09-07

Abstract

The utility model relates to a silver-saving and brass-saving double-bridge type contact which is suitable for high-capacity or medium-capacity electromagnetic contactors in ordinary tasks and important tasks. The utility model is characterized in that on the basis of a silver-saving electromagnetic contactor with a double-bridge type contact (patent application number is CN86205784), a spiral spring is changed into two sheet-shaped springs which respectively act on a main contact bridge and an arc contact bridge; the flat plate shape of the arc contact bridge is changed into a boat shape or a groove shape; a C-shaped static arc contact conductive board is made of iron instead of brass. The dual purpose of silver saving and brass saving can be achieved by the improved measures; besides, the index of electric performance can be improved further.

Description

Double-bridge type contact saving silver and copper

Belong to and be applicable to jumbo electromagnetic contactor in general task and the important task affair.

The utility model is improved to form on the basis of bi-bridge type contact silver saving electromagnetic contactor (CN number of patent application 86205784 is seen Fig. 1), its purpose can also save copper except saving the silver to greatest extent, and further improves contact electric life index to greatest extent.To reach the general electromagnetic contactor of general task and important task affair.

Fig. 1---the structure chart of bi-bridge type contact silver saving electromagnetic contactor

The bi-bridge type contact electromagnetism contacting structure figure of Fig. 2---joint silver, joint copper

Fig. 3---ship shape arc touches bridge design of part schematic diagram

Fig. 4---flute profile arc touches bridge design of part schematic diagram

Below by accompanying drawing the present invention is specified

(the CN number of patent application is 86205784 difference (see figure 2)s, mainly is that to act on two spring forces that touch on the bridge be to adopt two awave springs that vary in size for the utility model and bi-bridge type contact silver saving electromagnetic contactor.Spring leaf 3,4 is superimposed, and acts on arc respectively and touches bridge and main top of touching two terminal contacts of bridge.Moving arc touch bridge 2 then according to the size of existing product arc control device by plate ship shape (see figure 3) or the flute profile (see figure 4) of making into, in order to strengthen rigidity and conductive cross-sectional area, the material of Contraband shape quiet arc contact 1,5 conductive plates changes irony into by brass in addition, promptly is transformed into arcing contact in order to quicken electric arc from main contact.Thereby play arcing contact protection main contact.Alleviate as far as possible or avoid the effect of the scaling loss of electric arc.

Effect of the present utility model, except original can the about 50-60% of joint silver, after improvement, it is about 30% also can to save copper, and the electric life index of contact further improves, and then can prolong the useful life of electromagnetic contactor.

Embodiment:

Fig. 5 is CJ10 mouth-150 A.C. contactor joint silver, joint copper bi-bridge type four breakpoint structure of contact terminal schematic diagrames.

Fig. 6 is CJ20 mouth-160 A.C. contactor joint silver, joint copper bi-bridge type four breakpoint structure of contact terminal schematic diagrames.

By Fig. 5, Fig. 6 as seen, its change only is a contact system partly, and then fully identical with the original structure ， And of remainder can be general.The spring load characteristic of bi-bridge type contact be three grades stepped, and spring load characteristic is very steep, so needn't increase former electromagnet suction, promptly former electromagnetic system structure and parameter can be constant.As long as after former main contact system done above-mentioned improvement, just can be made into the general electromagnetic contactor of general task and important task affair.

Claims

1, joint silver, joint copper bi-bridge type contact, it includes two and touches bridge, and master touches bridge, an arc touches bridge, constitutes Direct Action Type bi-bridge type four breakpoint contacts, the arc that it is characterized in that anti-electric arc touches bridge and makes ship shape or flute profile, adopts two springs and act on the spring that touches on the bridge.

2, according to the described springs of claim 1, it is characterized in that two springs are awave, and be superimposed, act on respectively and main touch bridge and arc touches on the contact at bridge two ends.

3, the material according to the conductive plate of the described Contraband shape of claim 1 quiet arc contact is characterized in that adopting ferrous material to make.