CN102737914A

CN102737914A - Arc-quenching non-polar contactor

Info

Publication number: CN102737914A
Application number: CN2012102355593A
Authority: CN
Inventors: 戴丁志
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-02
Filing date: 2012-07-02
Publication date: 2012-10-17

Abstract

The invention discloses an arc-quenching non-polar contactor. The arc-quenching non-polar contactor comprises an electromagnetic component (25), a moving iron core (17), a static iron core (19), a push rod (20), a moving contact (23), a fixed electrode (1), and a case (2), wherein the fixed electrode is mounted on the case (2) and an insulator (4); the insulator (4) is a ceramic body; a magnetic steel (6) is respectively mounted at corresponding positions on two outer sides of the end part of the moving contact out of the ceramic body; and the two magnetic steels (6) are wrapped by a magnetic steel frame (5), and are arranged in such a manner that the magnetic properties are in the same direction. The arc generated at the moment when the moving contact is separated from the fixed electrode can be guided to the ceramic body by the opposite magnetic circuits generated by the two magnetic steels and the magnetic properties of the magnetic steels so as to eliminate and neutralize the arc, which directly results in non-polarity of the fixed electrode, thereby effectively preventing damage to the internal components of the contactors, improving convenience in use and installation, improving the contactor quality and prolonging the service life of the contactor product.

Description

The nonpolarity contactor of extinguishing arc formula

Technical field

The present invention relates to a kind of switch that can switch on or off the high-tension current power supply, be specifically related to a kind of contactor.

Background technology

Contactor is a kind of in order to control the electric equipment products of equipping to line powering, and it is widely used in home appliances and the industrial product.In recent years, along with the development of motor vehicle (like hybrid power, fuel-cell vehicle etc.), contactor is used as its mains switch.The operation principle of this contactor is to promote push rod through moving iron core movable contact spring is contacted with fixed electrode or to break off; Realization switches on or off the high-tension current power supply; Its fixed electrode external power supply is (promptly the needing the correct positive and negative electrode that inserts) that polarity is arranged; In moment that movable contact spring and fixed electrode separate and can produce electric arc between the two at this; And the extended length of this electric arc and duration can dissimilate according to the size of voltage and current, and it can cause certain infringement to the inner member of contactor, has shortened the useful life of contactor.

Summary of the invention

The objective of the invention is to overcome above-mentioned deficiency, can eliminate the nonpolarity contactor of extinguishing arc formula that movable contact spring and fixed electrode separate the electric arc that moment produces and provide a kind of.

The object of the invention is realized through following technical scheme: the nonpolarity contactor of a kind of extinguishing arc formula; Comprise electromagnetic component, moving iron core, static iron core, push rod, movable contact spring, fixed electrode, shell; This fixed electrode is contained on shell and the insulator; Said insulator is a ceramic body, outside this ceramic body and in the corresponding position in two outsides, end of movable contact spring, magnet steel is housed, and said magnet steel is encased by the magnet steel frame.The magnetic that is placed as of said two magnet steel is arranged in the same way.

After adopting the present invention; Movable contact spring and fixed electrode separate magnetic circuit (opposite each other) that electric arc that moment produces produces by two magnet steel and the magnetic channeling conduct (guiding on the ceramic body) of itself and eliminate, offset; And it is nonpolarity directly causing fixed electrode, thereby effectively prevents the inner member of contactor is caused damage, use, easier for installation; The quality of contactor product is improved, has prolonged the useful life of contactor product.

Description of drawings

Below in conjunction with accompanying drawing and execution mode the present invention is made further detailed description.

Fig. 1 is the structural representation of the nonpolarity contactor of extinguishing arc formula of the present invention.

Fig. 2 is the vertical view (having removed fixed electrode etc.) of Fig. 1.

Embodiment

Can know with reference to Fig. 1, Fig. 2; The nonpolarity contactor of extinguishing arc formula of the present invention; Comprise electromagnetic component 25, moving iron core 17, static iron core 19, push rod 20, movable contact spring 23, fixed electrode 1 (containing output), shell 2; This fixed electrode 1 is contained on shell 2 and the insulator 4; Said insulator 4 (its material) is a ceramic body, outside this ceramic body 4 and in the corresponding position in two outsides, end of movable contact spring 23, magnet steel 6 is housed, and said magnet steel 6 encases (effect of having played fixing magnet steel and having extended magnetic circuit) by magnet steel frame 5.Promptly this magnet steel 6, magnet steel frame 5 are on the ceramic body 4 between ceramic body 4 and the shell 2.Movable contact spring and fixed electrode separate magnetic circuit that electric arc that moment produces produces by two magnet steel and the magnetic channeling conduct (guiding on the ceramic body) of itself and eliminate, offset.For extinguishing arc, arc extinguishing better, the magnetic that is placed as of said two magnet steel 6 is arranged (promptly two magnet steel are the arrangement of the S/N utmost point, and are as shown in Figure 2) each other in the same way.

On the inwall of said ceramic body 4 and in the side edge of said push rod 20, has bead 26 (said bead 26 is four peripheries that are trapped among push rod 20); It has played partition effect preferably to the electric arc that produces; Reducing the pollution of electric arc, and movable contact spring played good guide effect (because movable contact spring is rising or may produce slight swing during decline) to the contact bridge that constitutes by push rod and movable contact spring.In order more effectively to eliminate electric arc, to extend magnetic circuit; And electric arc is directed on the ceramic body; The both ends of said magnet steel frame 5 extend to the corresponding lengthwise position place (be the generation position of electric arc, also can be bead 26 corresponding positions of ceramic body 4 inwalls, be as shown in Figure 2) of movable contact spring 23 ends.

Wherein, said magnetic conductive board 8, bobbin 9, enamelled wire 10, yoke 12 (U type) are formed electromagnetic component 25.On push rod 20 and movable contact spring 23, upper spring seat 24, compression spring 22, lower spring cup 21 are housed.Between static iron core 19, push rod 20 and movable contact spring 23, return spring 18 is housed.Between the magnetic conductive board 8 of insulator 4 and electromagnetic component 25, square frame sheet 7 is housed.In the bottom of shell 2 base plate 14 is housed.This contactor is applied to electronic capstan, winch, fork truck or electric automobile etc. to be needed to use with the power supply of high-voltage great-current.

As shown in the figure; No matter two outputs of the fixed electrode of this contactor insert positive pole, negative pole or negative pole, the positive pole of external power supply respectively; When producing electric arc in the contactor course of work; Produce respectively at two magnet steel under the effect in magnetic field, all can electric arc be arranged the two side ends to ceramic body, thereby prolong the useful life of contactor.Here the nonpolarity power supply in other words that refers to inserts nonpolarity requirement.

Left hand rule in the electromagnetism: left hand is open and flat, lets magnetic induction line pass the palm of the hand, makes thumb vertical with all the other four fingers, and all follows palm in a plane.Put into magnetic field to left hand, let magnetic induction line vertically penetrate the palm of the hand, the palm of the hand is towards the N utmost point, and four refer to point to the electric current direction, and then the direction of thumb is exactly the stressed direction of conductor.When the electric arc in the magnetic field produced, it was stressed based on left hand rule, so can be by the two side ends of row to ceramic body.

Claims

1. nonpolarity contactor of extinguishing arc formula; Comprise electromagnetic component (25), moving iron core (17), static iron core (19), push rod (20), movable contact spring (23), fixed electrode (1), shell (2); This fixed electrode (1) is contained on shell (2) and the insulator (4); It is characterized in that: said insulator (4) is a ceramic body, outside this ceramic body (4) and in the corresponding position in two outsides, end of movable contact spring (23), magnet steel (6) is housed, and said magnet steel (6) is encased by magnet steel frame (5).

2. the nonpolarity contactor of extinguishing arc formula according to claim 1 is characterized in that: the magnetic that is placed as of said two magnet steel (6) is arranged each other in the same way.

3. the nonpolarity contactor of extinguishing arc formula according to claim 1 and 2 is characterized in that: the both ends of said magnet steel frame (5) extend to the corresponding lengthwise position place of movable contact spring end.

4. the nonpolarity contactor of extinguishing arc formula according to claim 1 and 2 is characterized in that: on the inwall of said ceramic body (4) and in the side edge of said push rod (20), have bead (26).