CN203312193U

CN203312193U - Alternating current contactor

Info

Publication number: CN203312193U
Application number: CN2013204005503U
Authority: CN
Inventors: 吕树梁
Original assignee: TIANJIN SECOND RELAY FACTORY
Current assignee: TIANJIN SECOND RELAY FACTORY
Priority date: 2013-07-08
Filing date: 2013-07-08
Publication date: 2013-11-27
Anticipated expiration: 2023-07-08

Abstract

The utility model belongs to the field of the electric switch device, and in particular relates to an alternating current contactor which comprises an electromagnet, a coil, an iron core, a shell body, an armature, a movable frame, a counter-force spring, an arc extinguishing gate, a sliding rail, and a buffer spring. The electromagnet is arranged below the shell body; the coil is wound on the shell body; the iron core is fixed in the middle of the bottom of the shell body; the armature is arranged in the middle of the electromagnet; the counter-force spring is arranged between the armature and a guide block; the movable frame is provided with 3 bridge-type contacts; the shell body is provided with 3 static contacts; a contact portion between the armature and the electromagnet is provided with the sliding rail; each static contact is provided with the arc extinguishing gate; and the buffer spring is arranged between the movable frame and the shell body. The arc extinguishing gate of the alternating current contactor can performs the arc strike so as to break the contact arc and timely export the arc heat, and accordingly the breaking capacity is improved and the performance is safer and more reliable; and since the movable frame and the shell body are provided with a counter-force spring, and the buffer spring is arranged between the movable frame and the shell body, the alternating current contactor operates more stably and generates less noise.

Description

A kind of A.C. contactor

Technical field

The utility model belongs to the electronic control device field, relates in particular to a kind of A.C. contactor.

Background technology

Contactor is a kind of automation switch that is used for being switched on or switched off load-carrying alternating current-direct current main circuit or large volume controlled circuit, and major control is to liking motor, electric heater, electric welding machine, lighting apparatus etc.It is large that contactor is controlled capacity, is applicable to frequent operation and far distance controlled, is one of critical elements in automatic control system.The operation principle of contactor is: after the contactor coil energising, coil current can produce magnetic field, and the magnetic field of generation makes fixed core produce the moving iron core of electromagnetic attraction attraction, and drive A.C. contactor point action, normally-closed contact disconnects, the normally opened contact closure, and both link.When coil blackout, electromagnetic attraction disappears, and armature discharges under the effect of retracting spring, contact is restored, but there is the shortcoming that noise is large in commercially available contactor at present.

Summary of the invention

In order to solve the problems of the technologies described above, the utility model provides a kind of electromagnetic AC contactor, comprises electromagnet, coil, iron core, housing, armature, moving frame, reaction spring, and described electromagnet is arranged on the below of housing; Described coil winding is on housing; Described iron core is fixed in the middle of the bottom of described housing; Described armature is arranged on the centre of described electromagnet; Described iron core with described armature shaft to overlapping; The upper outside of described armature is fixed with guide pad; Between described armature and guide pad, be provided with reaction spring; Described moving frame is arranged on described armature top, characterized by further comprising arc-chute, sliding rail, buffer spring, on described moving frame, is provided with 3 bridge-shaped contacts; On described housing, be provided with 3 fixed contacts; Described 3 bridge-shaped contacts form 3 pairs of normally open contacts with 3 fixed contacts respectively; Contact site between described armature and described electromagnet is provided with sliding rail; Described arc-chute is arranged at described housing top and is positioned on described 3 fixed contacts; Described buffer spring is arranged between described moving frame and described housing.

Described sliding rail is the polytetrafluoroethylplastic plastic layer.

The thickness of described polytetrafluoroethylplastic plastic layer is 0.1-0.3mm.

The beneficial effects of the utility model are: arc-chute plays the striking effect, but not only break contact electric arc but also the electric arc heat can be derived in time improves breaking capacity, has avoided the generation of short circuit phenomenon, and performance is more safe and reliable; Moving frame and housing are provided with reaction spring, and between moving frame and housing, buffer spring are set, and make the more steady noise of A.C. contactor action less.

The accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further explained to explanation.

In figure, 1, electromagnet, 2, coil, 3, iron core, 4, housing, 5, armature, 6, moving frame, 7, reaction spring, 8, guide pad, 9, buffer spring, 10, bridge-shaped contact, 11, fixed contact, 12, normally open contact, 13, arc-chute, 14, sliding rail.

As shown in Figure 1, comprise electromagnet 1, coil 2, unshakable in one's determination 3, housing 4, armature 5, moving frame 6, reaction spring 7, arc-chute 13, sliding rail 14, buffer spring 9, electromagnet 1 is arranged on housing 4 belows, coil 2 is wrapped on electromagnet 1, the unshakable in one's determination 3 middle armature 5 in bottom that are fixed in housing 4 are arranged on the centre of electromagnet 1, unshakable in one's determination 3 with armature shaft 5 to overlapping, the upper outside of armature 5 is fixed with guide pad 8, between armature 5 and guide pad 8, be provided with reaction spring 7, moving frame 6 is arranged on armature 5 tops, on moving frame 6, be provided with 3 bridge-shaped contacts 10, on housing 4, be provided with 3

fixed contacts

11, 3 bridge-shaped contacts 10 form 3 pairs of normally open contacts 12 with 3 fixed contacts 11 respectively, contact site between armature 5 and electromagnet 1 is provided with the sliding rail 14 of polytetrafluoroethylplastic plastic material, arc-chute 13 is arranged at housing 4 tops and is positioned on 3 fixed contacts 11, buffer spring 9 is arranged between moving frame 6 and described housing 4.

Coil 2 is under "on" position, and coil 2 produces magnetic, and under the effect of coil 2 magnetic force, the armature 5 in the middle of contactor is taken the lead moving frame 6 and moved down, and bridge-shaped contact 10 contacts with fixed contact 11, and reaction spring 7 is in compressive state.When electromagnetic system was in off-position, magnetic force disappeared, and under the elastic force effect of the reaction spring 7 compressed, moving frame 6 moves up, and bridge-shaped contact 10 contacts disconnection with fixed contact 11, and under the effect of buffer spring 9, the rate of climb is slow, and the noise of formation is less.

Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to be used to limiting practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., within all should belonging to patent covering scope of the present utility model.

Claims

1. an A.C. contactor, comprise electromagnet (1), coil (2), (3), housing (4) unshakable in one's determination, armature (5), moving frame (6), reaction spring (7), and described electromagnet (1) is arranged on the below of housing (4); Described coil (2) is wrapped on housing (4); Described iron core is fixed (3) in the middle of the bottom of described housing (4); Described armature (5) is arranged on the centre of described electromagnet (1); Described iron core (3) axially overlaps with described armature (5); The upper outside of described armature (5) is fixed with guide pad (8); Between described armature (5) and guide pad (8), be provided with reaction spring (7); Described moving frame (6) is arranged on described armature (5) top, characterized by further comprising arc-chute (13), sliding rail (14), buffer spring (9), on described moving frame (6), is provided with 3 bridge-shaped contacts (10); On described housing (4), be provided with 3 fixed contacts (11); Described 3 bridge-shaped contacts (10) form 3 pairs of normally open contacts (12) with 3 fixed contacts (11) respectively; Contact site between described armature (5) and described electromagnet (1) is provided with sliding rail (14); Described arc-chute (13) is arranged at described housing (4) top and is positioned on described 3 fixed contacts (11); Described buffer spring (9) is arranged between described moving frame (6) and described housing (4).

2. a kind of A.C. contactor according to claim 1, it is characterized in that: described sliding rail (14) is the polytetrafluoroethylplastic plastic layer.

3. a kind of A.C. contactor according to claim 2, it is characterized in that: the thickness of described polytetrafluoroethylplastic plastic layer is 0.1-0.3mm.