CN102820173B

CN102820173B - Electrical contactor

Info

Publication number: CN102820173B
Application number: CN201210183274.XA
Authority: CN
Inventors: 崔官浩
Original assignee: LS Industrial Systems Co Ltd
Current assignee: LS Electric Co Ltd
Priority date: 2011-06-08
Filing date: 2012-06-05
Publication date: 2015-02-11
Anticipated expiration: 2032-06-05
Also published as: KR101276905B1; CN102820173A; KR20120136256A

Abstract

The present invention provides an electrical contactor. The electrical contactor comprises: a frame; a fixed core arranged in the frame; a coil around the fixed core in the frame; a movable core movably disposed on the frame, wherein the movable core moves toward the fixed core through a magnetic field generated by applying an electric power to the coil; a crossbar movably associated with the movable core; a movable contact disposed on the crossbar; and a fixed contact assembly selectively contacted with the movable contact. The crossbar is provided with a supporting part. One side of the fixed contact assembly is supported by the supporting part. Because each fixed contact and an arc-quenching section have simplified shapes, the manufacturing process can be simplified. In addition, the fixed contacts can effectively resist external forces due to contact of the movable contacts.

Description

Electric contactor

Technical field

The disclosure relates to a kind of electric contactor.

Background technology

Electric contactor is a kind of device forming magnetic switch together with thermal relay, disconnects or closed circuit for preventing the overload of the load side equipment of such as motor.Usually, electric contactor is by operation electriomagnet.And the operation of electric contactor operational load side apparatus or stopping load side equipment is to protect load side equipment.That is, when overcurrent is equal to, or greater than the predetermined value flowing to load side equipment, thermal relay cuts out electric contactor to stop the operation of load side equipment.

Fig. 1 forms the stereogram according to the fixed contact assembly of the electric contactor of prior art.

With reference to Fig. 1, be positioned at according to the fixed contact assembly 1 of the electric contactor of prior art and be fixed in the fixed contact assembly seat part that is arranged on lower frame (not shown).Fixed contact assembly 1 comprises: terminal 2, the fixed contact 3 being fixed to terminal 2 one end and arc-quenching part 4, its electric arc produced when fixed contact 3 and movable contact (not shown) are separated from one another for quenching.

In fact, fixed contact 3 comprises the contact part 3a contacted with movable contact.Each bended several times in fixed contact 3 and arc-quenching part 4 is to form U-shaped.The shape of fixed contact 3 is for when fixed contact 3 contacts with each other with movable contact, prevents fixed contact 3 to be out of shape due to the external force acted on fixed contact 3.

But, according to the electric contactor of prior art, there is following limitation.

First, each in fixed contact 3 and arc-quenching part 4 is bent for several times to form U-shaped.Therefore there is such limitation: the manufacturing process of fixed contact 3 and arc-quenching part 4 is complicated.

And, because fixed contact 3 contacts movable contact repeatedly, so the restoring force of fixed contact 3 may reduce.So due to the minimizing of the restoring force of fixed contact 3, fixed contact 3 and the contact between movable contact are be separated may inaccuracy.

Summary of the invention

Embodiment provides a kind of electric contactor that can produce more simply.

Embodiment still provides a kind of electric contactor can guaranteeing operating reliability.

In one embodiment, electric contactor comprises: framework; Be arranged on the fixing heart in described framework; Be set to the coil around the described fixing heart in described framework; Arrange active heart on said frame movably, described active heart is by magnetizing to coil the magnetic field produced in described coil moving toward the described fixing heart by applying electric power; With the cross bar of the motion association of described active heart; Be arranged on the movable contact on described cross bar; And the fixed contact assembly optionally contacted with described movable contact, wherein, support section is set on said frame, and the side of described fixed contact assembly is supported by described support section.

The details of one or more embodiment is listed in drawing and description hereafter.Other features by specification, accompanying drawing and will be become apparent by claims.

Embodiment

Hereinafter, the electric contactor according to embodiment is described with reference to the accompanying drawings in detail.

Fig. 2 is the stereogram of the electric contactor according to embodiment.Fig. 3 is the cutaway view of the electric contactor according to embodiment.Fig. 4 is the stereogram of the fixed contact assembly according to embodiment.

With reference to Fig. 2 to Fig. 4, comprise framework 11 according to the electric contactor 10 of embodiment, the fixing heart 15 be arranged in framework 11, be set to around the coil 16 of the fixing heart 15, by by the active heart 17 of attraction movement produced in the magnetized fixing heart 15 of coil 16, the cross bar 12 being fixed to active heart 17 and back-moving spring 18, back-moving spring 18 is arranged between the fixing heart 15 and active heart 17 to provide restoring force to make active heart 17 reset to active heart 17.

In addition, multiple movable contact 13 is arranged on cross bar 12.Movable contact 13 hereafter will describe with multiple fixed contact 22(respectively) electrical contact or electrically separated with multiple fixed contact 22 respectively.In addition, buffer spring 14 is arranged on cross bar 12.Buffer spring 14 provides elastic force to each movable contact 13 on the direction that buffer spring 14 contacts with each fixed contact 22.

Each setting in multiple fixed contact assembly 20 on the frame 11.In fact, fixed contact assembly 20 is arranged on the top surface of the framework 11 corresponding with the downside of each movable contact 13.

The arc-quenching part 24 that each fixed contact assembly 20 comprises terminal 21, is arranged on the fixed contact 22 on the top surface of terminal 21 and is arranged on the top surface of fixed contact 22.In this embodiment, fixed contact 22 and arc-quenching part 24 are fixed to terminal 21 by the coupling member of such as screw.

Particularly, terminal 21 is for having the writing board shape of predetermined length.Terminal 21 comprises Part I 21A and Part II 21B.Part I 21A and Part II 21B be separately positioned on there is step shape part plane on and parallel to each other.Such as, because the part corresponding with the border between Part I 21A and Part II 21B of terminal 21 has been bent twice, thus Part I 21A and Part II 21B be arranged on there is step shape part plane on and parallel to each other.In this embodiment, Part I 21A is arranged on the below of Part II 21B.Part I 21A is fixed to framework 11, and fixed contact 22 and arc-quenching part 24 are fixed to Part II 21B.

The side of fixed contact 22 is fixed to terminal 21, in fact, is fixed to Part II 21B.In addition, the other end of fixed contact 22 is provided with fixed contact part 23.In fact, the other end its of fixed contact 22 being provided with fixed contact part 23 is arranged on the below being fixed to one end of terminal 21 of fixed contact 22.For this reason, fixed contact 22 can bend twice as terminal 21, or bending once with predetermined angle.Fixed contact part 23 optionally contacts with the movable contact part (not shown) be arranged on movable contact 13.

In addition, one end of arc-quenching part 24 is fixed to the side of terminal 21, and this side of terminal 21 is the side (i.e. Part II 21B) that fixed contact 22 is fixed on it.In fact, terminal 21(Part II 21B), fixed contact 22 and arc-quenching part 24 can stack in succession.The other end of arc-quenching part 24 is arranged on the top of its one end.As described above, arc-quenching part 24 can be produced by the operation identical with fixed contact 22.In addition, the V-notch part of the high-voltage arc gas produced when fixed contact 22 and movable contact (being essentially fixed contact part 23 and movable contact part) are separated from one another for quenching is limited in the other end of arc-quenching part 24.

Support section 111 is arranged on the top surface of framework 11.Support section 111 upwards extends from the top surface of framework 11.Support section 111 can support fixed contact 22.For this reason, support section 111 upwards extends from the top surface of framework 11 and contacts with the basal surface of the other end with fixed contact 22, and fixed contact part 23 is arranged on the basal surface of this other end of fixed contact 22.As described above, because fixed contact part 23 is supported by support section 111, thus its can prevent fixed contact 22 on the moving direction of movable contact 13 by when fixed contact 22 contacts with each other with movable contact 13 the external force that produces exceedingly extrude.

Hereinafter, the effect according to the electric contactor of embodiment will be described in detail.

First, when electric power is applied to coil 16 and therefore coil 16 is excited, the fixing heart 15 is magnetized.So active heart 17 is moved down toward the fixing heart 15 by magnetic force (attraction namely produced in the magnetized fixing heart 15).So the cross bar 12 being fixed to active heart 17 also can move down toward the fixing heart 15.

When cross bar 12 declines, the movable contact 13 be arranged on cross bar 12 also can move down.So fixed contact 22 and movable contact 13(are in fact fixed contact part 23 and movable contact part) can contact with each other that electric current is applied to circuit.

In this embodiment, fixed contact 22 is supported by support section 111.Therefore, even if compared with the shape of the fixed contact according to prior art, fixed contact 22 has the shape of relative simplicity, but fixed contact 22 is also enough to opposing by contacting institute's externally applied forces with movable contact 13.

Such as, when overcurrent flows is to discharge the on-state of electric contactor 10, the electric power being applied to the fixing heart 15 is cut off.So fixing attraction between the heart 15 and active heart 17 disappears.Consequently, active heart 17 is moved up by the elastic-restoring force of back-moving spring 18.So, because active heart 17 moves up, so cross bar 12 and movable contact 13 also can move up.Therefore, fixed contact 22 and movable contact 13(and fixed contact part 23 and movable contact part) separated from one another.

Herein, when fixed contact 22 and movable contact 13 are separated from one another, high-voltage arc gas is created.High-voltage arc gas produced as described above is by arc-quenching part 24 quenching.

According in the electric contactor of embodiment, fixed contact compares the shape can with relative simplicity with the fixed contact according to prior art with arc-quenching part with each in arc-quenching part.So, according to the present embodiment, because each in fixed contact and arc-quenching part has the shape of simplification, so manufacturing process can be very easy.

In addition, in the present embodiment, fixed contact assembly can by the supports support be arranged in lower frame.Therefore, fixed contact assembly can effectively resist the external force acted on when fixed contact and movable contact contact with one another.

It should be understood that those skilled in the art can dream up by fall in the spirit and scope of disclosure principle multiple other improvement and embodiment.Especially, in the scope of the disclosure, accompanying drawing and claims, the parts can arranged subject combination and/or layout make various modification and improvement.

Accompanying drawing explanation

Fig. 1 forms the stereogram according to the fixed contact assembly of the electric contactor of prior art;

Fig. 2 is the stereogram of the electric contactor according to embodiment;

Fig. 3 is the cutaway view of the electric contactor according to embodiment;

Fig. 4 is the stereogram of the fixed contact assembly according to embodiment.

Claims

1. an electric contactor, comprising:

Have the framework of support section, described support section upwards extends from the top surface of described framework;

Be arranged on the fixing heart in described framework;

Be set to the coil around the described fixing heart in described framework;

Arrange active heart on said frame movably, described active heart is by moving toward the described fixing heart in the magnetic field produced in magnetized described coil to coil by applying electric power;

With the cross bar of the motion association of described active heart;

Be arranged on the movable contact on described cross bar; And

The fixed contact assembly optionally contacted with described movable contact, described fixed contact assembly has the side supported by described support section,

Wherein said fixed contact assembly comprises:

Be fixed to the terminal of described framework;

Be fixed to the fixed contact of the side of described terminal, described fixed contact optionally contacts with described movable contact; And

Be fixed to the arc-quenching part of the side of described terminal, the quenching of described arc-quenching part when described movable contact and described fixed contact separated from one another time the arcing gas that produces,

Wherein, described terminal comprises:

Be fixed to the Part I of the described top surface of described framework; And

Part II, described fixed contact and described arc-quenching partial fixing are to described Part II, and described Part II extends from described Part I to make described Part I and described Part II relative to each other have step shape part,

Wherein, described fixed contact and described arc-quenching part overlay on described Part II in succession,

Wherein, described Part II is supported on the described support section of described framework.

2. electric contactor according to claim 1, wherein, described terminal be bent there is to make another part of a part for described terminal and described terminal be separately positioned on for twice step shape part plane on and parallel to each other.

3. electric contactor according to claim 1, wherein, described fixed contact one end is fixed to described terminal, and the other end is arranged on the below of described one end of described fixed contact.

4. electric contactor according to claim 3, wherein, the described fixed contact contacted with the movable contact be arranged in movable contact part is fixed to the other end of fixed contact part.

5. electric contactor according to claim 1, wherein, described arc-quenching part one end is fixed to described terminal, and the other end is arranged on the top of described one end of described arc-quenching part.

6. electric contactor according to claim 5, wherein, for quenching when described fixed contact and described movable contact separated from one another time the cut out portion of arcing gas that produces be arranged on the described other end of described arc-quenching part.

7. according to the electric contactor in claim 2 to 5 described in, wherein, described fixed contact and described arc-quenching part are fixed to described terminal by a coupling member.