CN102820173A

CN102820173A - Electrical contactor

Info

Publication number: CN102820173A
Application number: CN201210183274XA
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: 2012-12-12
Anticipated expiration: 2032-06-05
Also published as: KR20120136256A; CN102820173B; KR101276905B1

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 ofly to constitute the device of magnetic switch with thermal relay, is used to prevent break off or closed circuit such as the overload of the load side equipment of motor.Usually, electric contactor is by operation electriomagnet.And electric contactor operational load side apparatus perhaps stops the operation of load side equipment with protection load side equipment.That is to say that when overcurrent was equal to, or greater than the predetermined value that flows to load side equipment, thermal relay cut out electric contactor to stop the operation of load side equipment.

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

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

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

Yet, have following limitation according to the electric contactor of prior art.

At first, each in fixed contact 3 and the arc-quenching part 4 is bent for several times to form U-shaped.Therefore have 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 possibly reduce.So because the minimizing of the restoring force of fixed contact 3, the contact between fixed contact 3 and the movable contact is with separate maybe inaccuracy.

Summary of the invention

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

Embodiment also provides a kind of electric contactor that can guarantee operating reliability.

In one embodiment, electric contactor comprises: framework; Be arranged on the fixedly heart in the said framework; Be set to around the coil of the interior said fixedly heart of said framework; Be arranged on the movable heart on the said framework movably, the said movable heart is through magnetizing the magnetic field that is produced in the said coil and moving toward the said fixedly heart through applying electric power to coil; Cross bar with the motion association of the said movable heart; Be arranged on the movable contact on the said cross bar; And the fixed contact assembly that optionally contacts with said movable contact, wherein, on said framework, support section is set, and a side of said fixed contact assembly is supported by said support section.

Enumerated the details of one or more embodiment in the drawing and description hereinafter.Other characteristics will become obvious by specification, accompanying drawing with by claims.

Description of drawings

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

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

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

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

Embodiment

Hereinafter, will describe electric contactor in detail with reference to accompanying drawing according to embodiment.

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

With reference to Fig. 2 to Fig. 4; Electric contactor 10 according to embodiment comprises framework 11, be arranged on the fixedly heart 15 in the framework 11, be set to the coil 16 around the fixing heart 15, the movable heart 17, the cross bar 12 that is fixed to the movable heart 17 and the back-moving spring 18 that moves through the attraction by generation in the coil 16 magnetized fixedly hearts 15, and back-moving spring 18 is arranged on fixedly between the heart 15 and the movable heart 17 to provide restoring force to make the movable heart 17 reset to the movable heart 17.

In addition, a plurality of movable contacts 13 are arranged on the cross bar 12.Movable contact 13 electrically contacts with a plurality of fixed contacts 22 (hereinafter will be described) respectively or separates with a plurality of fixed contact 22 electricity respectively.In addition, buffer spring 14 is arranged on the cross bar 12.Buffer spring 14 provides elastic force to each movable contact 13 on buffer spring 14 and direction that each fixed contact 22 contacts.

In a plurality of fixed contact assemblies 20 each is arranged on the framework 11.In fact, fixed contact assembly 20 is arranged on the top surface with the corresponding framework 11 of the downside of each movable contact 13.

Each fixed contact assembly 20 comprises terminal 21, be arranged on the fixed contact 22 on the top surface of terminal 21 and be arranged on the arc-quenching part 24 on the top surface of fixed contact 22.In this embodiment, fixed contact 22 is fixed to terminal 21 with arc-quenching part 24 through the coupling member such as screw.

Particularly, terminal 21 is for having the writing board shape of predetermined length.Terminal 21 comprises 21A of first and second portion 21B.21A of first and second portion 21B are separately positioned on the plane with step shape part and are parallel.For example because terminal 21 and 21A of first and second portion 21B between the corresponding part in border be bent twice, so 21A of first and second portion 21B are arranged on the plane with step shape part and are parallel.In this embodiment, the 21A of first is arranged on the below of second portion 21B.The 21A of first is fixed to framework 11, and fixed contact 22 is fixed to second portion 21B with arc-quenching part 24.

One side of fixed contact 22 is fixed to terminal 21, in fact, is fixed to second portion 21B.In addition, be provided with fixed contact part 23 on the other end of fixed contact 22.In fact, the other end that is provided with fixed contact part 23 on its of fixed contact 22 is arranged on the below of an end that is fixed to terminal 21 of fixed contact 22.For this reason, fixed contact 22 can be as terminal 21 bent twice, perhaps with predetermined angular bend once.Fixed contact part 23 optionally be arranged on movable contact 13 on movable contact part (not shown) contact.

In addition, an end of arc-quenching part 24 is fixed to a side of terminal 21, and this side of terminal 21 is that fixed contact 22 is fixed to the side (being second portion 21B) on it.In fact, terminal 21 (second portion 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 one of which end.As indicated above, arc-quenching part 24 can be through the operation production identical with fixed contact 22.In addition, the V-notch that is used for the high-voltage arc gas that quenching produced when fixed contact 22 and movable contact (being essentially fixed contact part 23 and movable contact part) are separated from one another partly 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 extends upward from the top surface of framework 11.Support section 111 can support fixation contact 22.For this reason, support section 111 extends upward contacting with the basal surface of the other end of fixed contact 22 from the top surface of framework 11, and fixed contact part 23 is arranged on the basal surface of this other end of fixed contact 22.As indicated above, because fixed contact part 23 is supported by support section 111, so it can prevent that fixed contact 22 from exceedingly being pushed by the external force that when fixed contact 22 and movable contact 13 contact with each other, is produced on the moving direction of movable contact 13.

Hereinafter, with the effect of describing in detail according to the electric contactor of embodiment.

At first, when electric power was applied to coil 16 and coil 16 therefore by excitation, fixedly the heart 15 was magnetized.So the movable heart 17 moves down toward the fixing heart 15 through magnetic force (attraction that promptly in the magnetized fixedly heart 15, is produced).So the cross bar 12 that is fixed to the movable heart 17 also can move down toward the fixing heart 15.

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

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

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

When fixed contact 22 and movable contact 13 are separated from one another, produced high-voltage arc gas here.The high-voltage arc gas that produces as indicated above is by 24 quenchings of arc-quenching part.

In the electric contactor according to embodiment, each in fixed contact and the arc-quenching part is partly compared the shape that can have relative simplification with the fixed contact according to prior art with arc-quenching.So, according to present embodiment, because each in fixed contact and the arc-quenching part has the shape of simplification, so manufacturing process can be very easy.

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

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

Claims

1. electric contactor comprises:

Framework;

Be arranged on the fixedly heart in the said framework;

Be set to around the coil of the interior said fixedly heart of said framework;

Be arranged on the movable heart on the said framework movably, the said movable heart is through moving toward the said fixedly heart in the magnetic field that is produced in the magnetized said coil through applying electric power to coil;

Cross bar with the motion association of the said movable heart;

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

The fixed contact assembly that optionally contacts with said movable contact,

Wherein, said framework is provided with support section, and

One side of said fixedly contact assembly is supported by said support section.

2. electric contactor according to claim 1, wherein, said fixed contact assembly comprises:

Be fixed to the terminal of said framework;

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

Be fixed to the arc-quenching part of a side of said terminal, the arcing gas that the quenching of said arc-quenching part is produced when said movable contact and said fixed contact are separated from one another.

3. electric contactor according to claim 2, wherein, said terminal comprises:

Be fixed to the first of said framework; And

Second portion, said fixed contact and said arc-quenching partial fixing to said second portion, said second portion extends so that said first and said second portion relative to each other have step shape part from said first.

4. electric contactor according to claim 3, wherein, said fixed contact and said arc-quenching part overlay on the surface of said second portion in succession.

5. electric contactor according to claim 2, wherein, said terminal is bent twice so that another part of the part of said terminal and said terminal is separately positioned on the plane with step shape part and is parallel.

6. electric contactor according to claim 2, wherein, said fixed contact one end is fixed to said terminal, and the other end is arranged on the below of a said end of said fixed contact.

7. electric contactor according to claim 6, wherein, the said fixed contact that contact with movable contact on being arranged on movable contact part is fixed to the fixed contact other end partly.

8. electric contactor according to claim 2, wherein, said support section contacts with the basal surface of said fixed contact part.

9. electric contactor according to claim 2, wherein, said arc-quenching part one end is fixed to said terminal, and the other end is arranged on the top of a said end of said arc-quenching part.

10. electric contactor according to claim 9, wherein, the notch portion that is used for the arcing gas that quenching produced when said fixed contact and said movable contact are separated from one another is arranged on the said other end of said arc-quenching part.

11. according to described electric contactor in the claim 2 to 9, wherein, said fixed contact and said arc-quenching part are fixed to said terminal by a coupling member.