CN2188237Y

CN2188237Y - Knife switch with strengthened elastic contact conductor element

Info

Publication number: CN2188237Y
Application number: CN 93235191
Authority: CN
Inventors: 张悦仁; 夏罡; 张劲柏; 姜红; 吕爱菊
Original assignee: ZHONGNAN POLYTECHNIC COLLEGE
Current assignee: ZHONGNAN POLYTECHNIC COLLEGE
Priority date: 1993-12-09
Filing date: 1993-12-09
Publication date: 1995-01-25
Anticipated expiration: 2003-12-09

Abstract

The utility model provides a knife switch with strengthened elastic contact conductor element. As is disclosed in the specification, a clip spring (1) is composed of a two-layer material, the inner layer (3) is red copper, and the outer layer (4) is austenitic stainless steel or spring steel. The knife switch blade (2) is composed of a three-layer material, the middle layer (6) is steel and the two outer layers (5) are red copper. The red copper and the stainless steel, and the red copper and the steel are welded together into a whole by adopting compound technology. The red copper mainly plays a role of contact conductance, and the austenitic stainless steel and the steel mainly play the role of strengthening. The utility model has the advantages of good contact, smaller contact resistance, reliable usability, long service life, etc.

Description

Knife switch with strengthened elastic contact conductor element

The utility model relates to a kind of knife switch that is used to connect with cut off circuit.

Two-phase or three-phase, the numerous all kinds of knife switches of specification are the very wide electric products of a kind of application.The Elastic Contact conducting element of existing like product---intermediate plate spring ［ (1) in the accompanying drawing 1 ］ and blade of knife switch ［ (2) in the accompanying drawing 1 ］, system adopts red copper to make usually.Though red copper has good electric conductivity, its intensity and elasticity are not good enough, and easy deformation and forfeiture elasticity are because of arc discharge is annealed red copper afterwards more so.Because there is above-mentioned deficiency in the red copper performance, knife switch in use, along with the increase that repeats the open and close number of times, the phenomenon of loose contact often appears in its red copper contact conducting element, thereby cause the contact resistance of knife switch to increase, energy consumption increases, and shorten useful life, and severe patient also may cause the phase failure and burn out power consumption equipment.

For overcoming the above-mentioned defective of existing knife switch, the utility model provides a kind of its knife switch of Elastic Contact conducting element through adopting stainless steel and steel to strengthen.Its structure as shown in Figure 2, the intermediate plate spring (1) in the knife switch is made of two layers of material, its inboard (3) still are red copper, its skin (4) then is austenitic stainless steel or spring steel; Blade of knife switch in the knife switch (2) is made of trilaminate material, and its two skin (5) also remains red copper, but its intermediate layer (6) then are steel.Red copper and stainless steel or spring steel and red copper and steel become one by the combination process seam.The intermediate plate spring mainly rises with red copper in the blade of knife switch and contacts electric action, and is promptly the same with existing like product, utilized the little advantage of red copper resistance; And austenitic stainless steel in them and steel, inherent characteristic such as then because of its intensity height, good springiness is difficult for annealing softening, and is not yielding mainly plays invigoration effect, promptly plays skeleton function, and can make the intermediate plate spring through strengthening keep its enough elasticity chronically; This has just guaranteed to contact compactness and repeatability between intermediate plate spring and the blade of knife switch.。

The utility model has following advantage and good effect:

Strengthen by stainless steel or spring steel through adopting for the intermediate plate spring, the knife switch of blade of knife switch through adopting steel to strengthen, through after repeatedly repeating open and close, still have contact well, contact resistance is less, advantages such as energy consumption is less, and serviceability is reliable and grow useful life.Therefore, the utility model is a kind of energy-conservation, reliable and durable electric product, can be used in industrial and the civilian electric wiring and electric equipment.

The explanation of accompanying drawing 2:

Accompanying drawing 2 is the utility model knife switch partial cutaway schematic under closure state.Realize that difficult point of the present utility model is design and makes intermediate plate spring (1) and blade of knife switch (2).Its best manufacture method is: by explosive welding (EW) combination process or composite technique for rolling, make red copper-austenitic stainless steel or spring steel composite plate and the two-sided copperclad plate of copper core earlier; Carry out cutting and bending ram moulding then.The making of other part is identical with the production technology of existing like product with production technologies such as assemblings.

Claims

The knife switch of Elastic Contact conducting element through strengthening, it is characterized in that: intermediate plate spring (1) is made of two layers of material, and its internal layer (3) is a red copper, and its skin (4) is austenite stainless or spring steel; Blade of knife switch (2) is made of trilaminate material, and its intermediate layer (6) are steel, and its two skin (5) is a red copper.