CN2238484Y

CN2238484Y - No-voltage operating AC contactor

Info

Publication number: CN2238484Y
Application number: CN 95239628
Authority: CN
Inventors: 严丽敏; 严双林
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-22
Filing date: 1995-04-22
Publication date: 1996-10-23
Anticipated expiration: 2005-04-22

Abstract

The utility model relates to an AC contactor. At least one self-locking switch is arranged on the arc extinguishing cover arranged on the upper part of the utility model, two connecting rods are fixed with two of three main contacts, a pressing plate is connected between the two connecting rods, the bottom surface of the press plate is just contacted with the vertex of the self-locking switch, and only one normal open button is connected in the energizing circuit of the electromagnetic coil of the utility model.

Description

There is not the AC contactor of pressure

The utility model relates to a kind of A.C. contactor.

Existing A.C. contactor, its inner solenoid must be switched on when main contact connection work all the time, guarantees that to keep enough suction contact closely contacts.Its coil control ammonium button is two, and one is used to start adhesive for often driving button, and another is normally closed button, is used to close disconnection.Perhaps adopt a switch to replace.But coil electricity is to generate heat, if overlong time, the heat of coil own distributes too late, and temperature can more be amassed higher, causes burning coil at last.And two short-circuited conducting sleeves in the electromagnet of A.C. contactor inside, the especially electromagnet all can generate heat, and this has just aggravated coil heating.The damage of most of A.C. contactor is all caused by coil burnout, so the electrical continuous rate of A.C. contactor is controlled in 40%.When working owing to existing A.C. contactor in addition, solenoid is in "on" position all the time, so also need consume certain power consumption, causes waste.

The purpose of this utility model is exactly in order to address the above problem, and provides a kind of nothing that can not burn solenoid and electrical energy saving to press AC contactor.

Technical solution of the present utility model:

A kind of nothing is pressed AC contactor, it includes the main contacts arc-extinguish chamber (2) on A.C. contactor main body (1) and top thereof, it is characterized in that on arc-extinguish chamber (2), being fixed with at least a self-lock switch (3), in any two of three main contacts (4), upwards be fixed with two connecting rods (5), be connected with pressing plate (6) between two connecting rods (5), and pressing plate (6) end and contacting with the summit of self-lock switch (3) just, and on the solenoid power circuit of A.C. contactor, be connected to and only be connected to one and often drive button.

The utility model is organically organized self-lock switch and A.C. contactor and is one, and only is connected to one often drives button on the solenoid power circuit, the startup of A.C. contactor and disconnect and often open button control by this.When A.C. contactor is worked, in case its main contacts adhesive just utilizes self-lock switch to keep the operating state of A.C. contactor, and coil is often opened resetting and cutting off the power supply of button with starting, the problem that has thoroughly solved coil heating and burnt, useful life big leap ahead, electrical continuous rate also improves greatly.The utility model is simple in structure, and cost is low, and is operated in passive state, saves energy, and effect is very good.

Fig. 1 is a partial structurtes schematic diagram of the present utility model.

As Fig. 1, the utility model preferably adopts two concordant self-lock switchs (3) on arc-extinguish chamber (2), two connecting rods (5) are fixed in respectively on the both sides main contact (4), be fixed with pressing plate (6) between them, two square holes on the pressing plate (6) pass the square stem stem (7) of two self-lock switchs (3) just, touch on the flat board (8) that is connected as a single entity with square stem stem (7) top and press.During the utility model work, start earlier and often drive button, make the solenoid energising of A.C. contactor (1), three main contactss are connected in then three main contacts (4) adhesive, make the electrical appliance energized.When main contact (4) when adhesive moves down, drive its pressing plate (6) and move down, pressing plate (6) is depressed self-lock switch (3) in folding process, make self-lock switch (3) be in self-locking state.After often opening that button is closed and connecting, recover normally open at once again, so solenoid switches on thereupon also and also be cut off power circuit behind the adhesive main contact (4), no longer expend any power source, so thoroughly solved the difficult problem that coil heating burns.When disconnecting A.C. contactor (1), need only need click start button again, coil is switched on again, can make three main contacts (4) of adhesive carry out very little overtravel adhesive again moves, then pressing plate (6) compresses the flat board (8) of two self-lock switchs (3) again, so they just set back under inner self-locking spring effect and are in the relieving state, two self-lock switchs (3) simultaneously with pressing plate (6) and three main contacts (4) jack-up again, disconnect three main contactss and three phase mains when resetting.This drives button often by also cutting off the power supply later, and A.C. contactor (1) is finished the outage action, for ON Action is ready next time.The utility model is only just having electric current to pass through by moment logical and that disconnect like this, and all the other all are operated in passive state, and service behaviour is very reliable.

Claims

1. one kind is not had the AC contactor of pressure, it includes the main contacts arc-extinguish chamber (2) on A.C. contactor main body (1) and top thereof, it is characterized in that on arc-extinguish chamber (2), being fixed with at least a self-lock switch (3), in any two of three main contacts (4), upwards be fixed with two connecting rods (5), be connected with pressing plate (6) between two connecting rods (5), and pressing plate (6) end and contacting with the summit of self-lock switch (3) just, and on the solenoid power circuit of A.C. contactor, be connected to and only be connected to one and often drive button.

2. press AC contactor by the described nothing of claim 1, it is characterized in that on the cover (2) that goes out, preferably adopting two concordant self-lock switchs (3), two connecting rods (5) are fixed in respectively on the both sides main contact (4), be fixed with pressing plate (6) between them, two square holes on the pressing plate (6) pass the square stem stem (7) of two self-lock switchs (3) just and press and to touch on the flat board (8) that is connected as a single entity with square stem stem (7) top.