CN209266341U

CN209266341U - A kind of dynamic contact mechanism of dual-interruption point breaker

Info

Publication number: CN209266341U
Application number: CN201920069259.XU
Authority: CN
Inventors: 赵建平
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-16
Filing date: 2019-01-16
Publication date: 2019-08-16
Anticipated expiration: 2029-01-16

Abstract

The utility model discloses a kind of dynamic contact mechanisms of dual-interruption point breaker, including horizontal positioned along the longitudinal direction preceding static contact, rear contact assembly and moving contact, the rear end of preceding static contact is equipped with the first contact, the rear of preceding static contact is arranged in contact assembly afterwards, contact assembly includes connecting plate afterwards, the front end of connecting plate is equipped with rear static contact, and the front end of rear static contact is equipped with slot；The rear of preceding static contact is arranged in moving contact, the middle part of moving contact is connect by link mechanism with lever mechanism, moving contact has insertion end after a preceding contact jaw and one, and the preceding contact jaw of moving contact is equipped with the second contact cooperated with the first contact, the rear insertion end insertion of moving contact or disengaging slot；The rear insertion end that the stroke that first contact separates or is closed with the second contact is greater than moving contact is detached from or the stroke of insertion slot.The advantages of structure disconnected after breakpoint after in the utility model, makes the utility model not only have the advantages that strong breaking capacity, also has production cost low, long service life.

Description

A kind of dynamic contact mechanism of dual-interruption point breaker

Technical field

The utility model relates to breaker technical fields, the specially dynamic contact mechanism of dual-interruption point breaker.

Background technique

Breaker it is many kinds of, basic working principle is identical, can be promptly cut under non-normal condition Cut-off electric line guarantees the electrical equipment in circuit system and the safety of power supply line.

Moving contact is the core component of breaker, is used to division power supply line, when power supply line or electrical equipment occurred When load or short trouble, moving contact is automatically switched on, and is separated with static contact, to cut off power supply line rapidly, and dynamic and static touching The electric arc generated between head is elongated rapidly, subsequently into arc-chutes.

There are mainly two types of dual-interruption point breakers currently on the market, the first is the moving contact in original single-breakpoint circuit breaker On again serial or parallel connection increase a breakpoint, two arc zones are formed on a circuit, although this structure can be effective Short circuit breaking capacity is improved, but because increasing a breakpoint, and when the separation of dynamic and static contact, biggish electricity can be generated between the two Arc need to introduce arc-chutes arc extinguishing, and therefore, it is two that arc-chutes must also be increased by one, cause the drive of the operating mechanism of product Power increases one times, and entire product shape volume also becomes larger (because the presence in two arc extinguishing regions), this structure increases The production cost of breaker is added.

Second includes moving contact, static contact, flexible circuit conductor resistance and conductive plate, and the lower head of moving contact is equipped with the first silver medal Contact, the above-head of static contact are equipped with the second silver contact, are equipped with third silver contact, the tail of conductive plate below the tail portion of static contact The 4th silver contact is equipped with above portion, contacted between the first silver contact and the second silver contact be connected and formed can disconnecting circuit first Breakpoint, between third silver contact and the 4th silver contact contact be connected and formed can disconnecting circuit the second breakpoint.This structure Breaker can form high resistance absorption circuit although being in series with a resistance between static contact and conductive plate, more double than other Breakpoint arrangement reduces an arc quenching system, still, due to using welding manner flexible circuit conductor resistance (copper litz wire) and conductive Plate connection, the solder joint of welding position are easy to fall off, and breaker, by using for a long time, it is disconnected that flexible circuit conductor resistance is easy to appear part The phenomenon that splitting makes the section of flexible circuit conductor resistance become smaller, excessively high so as to cause flexible circuit conductor resistance temperature rise, causes breaker scaling loss, shadow Ring the service life of breaker.

In view of this, being badly in need of improving the structure of existing moving contact of breaker, can both reduce the number of arc-chutes Amount, improves the breaking capacity of breaker, reduces cost, and the service life of breaker can be improved.

Utility model content

Technical problem to be solved in the utility model is existing moving contact of breaker high production cost, and service life is short The problem of.

In order to solve the above-mentioned technical problem, technical solution used by the utility model is to provide a kind of dual-interruption point breaker Dynamic contact mechanism, be arranged in the shell of dual-interruption point breaker, including preceding static contact horizontal positioned along the longitudinal direction, thereafter End is equipped with the first contact, which is characterized in that further include:

The rear of the preceding static contact is arranged in contact assembly afterwards, and the rear contact assembly includes connecting plate, the connection The front end of plate is equipped with rear static contact, and the front end of the rear static contact is equipped with slot；

Moving contact, is arranged in the rear of the preceding static contact, and the middle part of the moving contact passes through link mechanism and Lever machine Structure connection, the moving contact have insertion end after a preceding contact jaw and one, and the preceding contact jaw of the moving contact is equipped with and institute The second contact of the first contact cooperation is stated, the slot is inserted into or is detached to the rear insertion end of the moving contact；

The moving contact is configured that

When the lever mechanism is pushed into close a floodgate, second contact is bonded with first contact, after the moving contact Insertion end is inserted into the slot, is realized and is powered；

When the lever mechanism is pulled to separating brake, second contact and first contact separation, after the moving contact Insertion end is detached from the slot, realizes power-off；

First contact and the rear insertion end that the stroke that second contact separates or is closed is greater than the moving contact are de- From or the insertion slot stroke.

In another preferred embodiment, the rear end of the rear static contact is equipped with two pieces of symmetrical clamping plates, described in two pieces The front end of clamping plate is respectively equipped with arc panel, and the gap between the front end of two pieces of arc panels forms the slot.

In another preferred embodiment, limiting through hole, the spring of open annular are respectively equipped on two pieces of clamping plates Across two limiting through hole, two free ends of the spring are born against in the outside of the arc panel.

In another preferred embodiment, two free ends of the spring respectively forwardly extend equipped with semicircle or arc The compressed part of shape.

In another preferred embodiment, the connecting plate includes sequentially connected first connecting plate and the second connection Plate, the rear static contact are detachably connected with second connecting plate.

In another preferred embodiment, the moving contact extends back to be equipped with far from the side of second contact and dash forward The top surface in the portion of rising, the rear static contact is equipped with the limiting slot being adapted to the protrusion.

In another preferred embodiment, the link mechanism includes upper connecting rod and lower link, the lever mechanism packet The lever for including tripping and being rotatably arranged in the tripping, the tripping are fixed on the shell of breaker by pin shaft.

In another preferred embodiment, the upper connecting rod is rotatably arranged in the tripping, the lower link rotation The lower end of the upper connecting rod is set, and the moving contact is rotatably arranged on the lower end of the lower link.

In another preferred embodiment, first contact is obliquely installed, with horizontal plane at 1 °~20 ° of angle.

Compared with prior art, in the utility model, the stroke that the first contact and the second contact separate is greater than moving contact Insertion end is detached from the stroke of slot afterwards, and lever mechanism is pushed into separating brake, before this second contact and the first contact separation, i.e., preceding breakpoint is disconnected It opens, followed by moving contact is detached from slot, i.e., rear breakpoint disconnects, the structure disconnected after this rear breakpoint, so that the utility model is not But has the advantages that strong breaking capacity, there are also having production cost low, the advantages of long service life, is described as follows:

(1) electric arc is not generated around breakpoint afterwards, therefore, an arc-chutes need to be only arranged in entire breaker, and structure is simple, can Reduce the production cost of breaker；

(2) when the second contact 21 has been separated with the first contact 11, moving contact can prevent so also without departing from slot 81 Current loop, shortens the arcing time generated when the second contact 21 and the first 11 disjunction of contact, resolves to extend The service life of road device.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model gate-dividing state；

Fig. 2 is the A direction view in Fig. 1；

Fig. 3 is the structural schematic diagram of the utility model "on" position；

Fig. 4 is the B direction view of Fig. 3.

Specific embodiment

The utility model provides a kind of dynamic contact mechanism of dual-interruption point breaker, and strong breaking capacity, structure is simple, production It is at low cost, long service life.In order to make those skilled in the art more fully understand application scheme, below in conjunction with the application Attached drawing in embodiment, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described reality Example is applied, only the embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ability Domain those of ordinary skill every other embodiment obtained without making creative work, all should belong to this Shen The range that please be protect.

It should be noted that term " first ", " second " etc. in the description and claims of this application and attached drawing It is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that the number used in this way According to being interchangeable under appropriate circumstances, so as to embodiments herein described herein.

In this application, the orientation or positional relationship of the instructions such as "front", "rear", "upper", "lower", "vertical", "horizontal" is It is based on the orientation or positional relationship shown in the drawings.As in Fig. 1 and Fig. 3 left side be positioned as before, after right side is defined as, above and below then with On the basis of drawing.These terms are not intended to limit meaning primarily to better describe the utility model and embodiment The device that shows, element or component must have particular orientation, or be constructed and operated with particular orientation.

It in addition, term " being equipped with " shall be understood in a broad sense, may be a fixed connection, be detachably connected or monolithic construction；It can To be mechanical connection, or electrical connection；It can be directly connected, or indirectly connected through an intermediary, or be two Internal connection between device, element or component.It for those of ordinary skills, can be as the case may be Understand the concrete meaning of above-mentioned term in the present invention.

As shown in figures 1 and 3, the dynamic contact mechanism of a kind of dual-interruption point breaker provided by the utility model is arranged double In the shell of breakpoint breaker, for being switched on or switched off power supply line.The dynamic contact mechanism includes being horizontally arranged along the longitudinal direction Preceding static contact 10, with preceding static contact 10 cooperation moving contact 20 and rear contact assembly, moving contact 20 and rear contact assembly are all provided with It sets at the rear of preceding static contact 10.

Contact assembly includes connecting plate 60 afterwards, and the front end of connecting plate 60 is equipped with rear static contact 80, and rear end is equipped with thermal element 70, As shown in Figure 2 and Figure 4, the front end of rear static contact 80 is equipped with slot 81.

The rear end of preceding static contact 10 is equipped with the first contact 11.Moving contact 20 is inserted into after having a preceding contact jaw and one End, preceding contact jaw are equipped with the second contact 21 for cooperating with the first contact 11, and rear insertion end is inserted with rear 80 front end of static contact Slot 81 matches, and can be inserted into or be detached from slot 81.

The middle part of moving contact 20 is connect by link mechanism 50 with lever mechanism 40, can be driven by operating lever mechanism 40 Moving contact 20 rotates clockwise or counterclockwise, and is switched on or switched off power supply circuit.Concrete configuration are as follows:

As shown in Figure 3 and Figure 4, when being pushed into close a floodgate by operating lever mechanism 40, link mechanism 50 drives moving contact 20 inverse Hour hands rotation, then, the second contact 21 is bonded with the first contact 11, while the rear insertion end of moving contact 20 is inserted into slot 81 It is interior, it realizes and is powered；

As depicted in figs. 1 and 2, when being pulled to separating brake by operating lever mechanism 40, link mechanism 50 drives moving contact 20 suitable Hour hands rotation, then, the second contact 21 is separated with the first contact 11, and the rear insertion end of moving contact 20 is detached from slot 81, is realized disconnected Electricity.

In the utility model, after the first contact 11 is greater than moving contact 20 with the stroke A1 that the second contact 21 separates or is closed Insertion end is detached from or the stroke A2 of insertion slot 81, is the rear insertion end insertion of moving contact 20 first during the energization therefore In slot 81, followed by the second contact 21 is bonded with the first contact 11；It is the second contact 21 and first first in power process Contact 11 separates, i.e., preceding breakpoint disconnects, followed by the rear insertion end of moving contact 20 is detached from slot 81, i.e., rear breakpoint disconnects, this The mode disconnected after breakpoint afterwards has the advantage that

Preceding breakpoint is broken as A1 stroke, and rear breakpoint is broken as A2 stroke, compares than the prior art, increases an A2 row Journey increases disconnection stroke, to improve the breaking capacity of breaker, and is not changing current circuit breaker operation mechanism and shell In the case where body, the breaking capacity of breaker is effectively increased, this connection type can be used for all kinds of miniature circuit breakers, plastic housing is broken Road device, frame circuit breaker and intelligent breaker.

As shown in Figure 2 and Figure 4, the rear end of rear static contact 80 is equipped with two pieces of symmetrical clamping plates 84, the front end of two clamping plates 84 It is respectively equipped with arc panel 82, the gap between the front end of two pieces of arc panels 82 forms slot 81, and the minimum widith of slot 81 is small In the width of moving contact 20, this mode for forming slot 81 by two pieces of arc panels 82, structure is simple, and production cost is low.

Limiting through hole is respectively equipped on two clamping plates 84, the spring 83 of open annular passes through two limiting through hole, spring 83 Two free ends bear against in the outside of arc panel 82, when moving contact 20 is inserted into slot 81, under the action of spring 83, The inner wall of slot 81 is fitted closely with moving contact 20, and spring 83 is that high temperature resistant is reinforced, and rear static contact 80 can be made to be powered, send out In the state of heat, the certain force value of stable holding remains turned on breaker persistently, to improve breaker in short-term It is resistant to electric current.

Two free ends of spring 83 respectively forwardly extend the compressed part 831 equipped with semicircle or arc, and compressed part 831 makes Being buckled on arc panel 82 tightly of spring 83 when moving contact 20 is inserted into slot 81, guarantees that slot 81 and moving contact 20 closely paste It closes.

As shown in figures 1 and 3, connecting plate 60 includes sequentially connected first connecting plate 61 and the second connecting plate 62, rear quiet Contact 80 is detachably connected with the second connecting plate 62, and this connection type structure is simple, and convenient disassembly is, it can be achieved that modularity connects It is assembled with intelligence.

Moving contact 20 extends back far from the side of the second contact 21 equipped with protrusion 23, and the top surface of rear static contact 80 is equipped with The limiting slot 85 being adapted to protrusion 23, protrusion 23 are configured that

As shown in Figure 1, protrusion 23 is stuck in limiting slot 85 when being pulled to separating brake by operating lever mechanism 40, it can be to dynamic Contact 20 plays the role of limit；

As shown in figure 3, protrusion 23 is far from limiting slot 85 when being pushed into close a floodgate by operating lever mechanism 40.

Link mechanism 50 includes upper connecting rod 51 and lower link 52, and lever mechanism 40 includes tripping 41 and is rotatably arranged on tripping Lever 42 on 41, tripping 41 are fixed on the shell of breaker by pin shaft 30.Upper connecting rod 51 is rotatably arranged in tripping 41, Lower link 52 is rotatably arranged on the lower end of upper connecting rod 51, and moving contact 20 is rotatably arranged on the lower end of lower link 52,51 He of upper connecting rod The setting of lower link 52 rotates moving contact 20 under the drive of lever 42 flexibly.

It is switched on or switched off the concrete configuration of power supply circuit by the driving moving contact 20 of operating lever mechanism 40 are as follows:

As shown in Figure 3 and Figure 4, when being pushed into close a floodgate by operating lever mechanism 40, upper connecting rod 51 is counterclockwise along upper shaft 511 Rotation, lower link 52 drive moving contact 20 to rotate counterclockwise along lower rotary shaft 521, and then, the second contact 21 and the first contact 11 are pasted It closes, while the rear insertion end of moving contact 20 is inserted into slot 81, realizes and be powered；

As depicted in figs. 1 and 2, when being pulled to separating brake by operating lever mechanism 40, upper connecting rod 51 is clockwise along upper shaft 511 Rotation, lower link 52 drive moving contact 20 to rotate clockwise along lower rotary shaft 521, and then, the second contact 21 is divided with the first contact 11 From the rear insertion end of moving contact 20 is detached from slot 81, realizes power-off.

First contact 11 is obliquely installed, and with horizontal plane at 1 °~20 ° of angle, this structure design makes the when closing a floodgate Two contacts 21 are bonded closer with the first contact 11.

The course of work of the utility model is as follows:

(1) as shown in Figure 3 and Figure 4, in normal operation, the first contact 11 is bonded with the second contact 21, moving contact In 20 insertion slots 81, breaker is in energized state, the flow direction of electric current are as follows: stationary contact before external connection terminals 90----- Static contact 80----- the second connecting plate 62----- pyrogen part the first connecting plate of 70----- after head 10----- moving contact 20----- 61；

(2) as depicted in figs. 1 and 2, when overload or short trouble occur for electrical equipment, upper connecting rod 51 is along upper shaft 511 It rotates clockwise, lower link 52 drives moving contact 20 to rotate clockwise along lower rotary shaft 521, to make the second contact 21 and the first touching 11 separation of point, moving contact 20 are detached from slot 81, and realization automatically powers off.

The utility model is not limited to above-mentioned preferred forms, and anyone should learn that the enlightenments in the utility model Under the structure change made, it is all that there is same or similar technical solution with the utility model, each fall within the utility model Within protection scope.

Claims

1. a kind of dynamic contact mechanism of dual-interruption point breaker, is arranged in the shell of dual-interruption point breaker, including along the longitudinal direction Horizontal positioned preceding static contact, its rear end are equipped with the first contact, which is characterized in that further include:

The rear of the preceding static contact is arranged in contact assembly afterwards, and the rear contact assembly includes connecting plate, the connecting plate Front end is equipped with rear static contact, and the front end of the rear static contact is equipped with slot；

Moving contact, is arranged in the rear of the preceding static contact, and the middle part of the moving contact is connected by link mechanism and lever mechanism It connects, the moving contact has an insertion end after a preceding contact jaw and one, and the preceding contact jaw of the moving contact is equipped with and described the The slot is inserted into or is detached to the rear insertion end of second contact of one contact cooperation, the moving contact；

The moving contact is configured that

When the lever mechanism is pushed into close a floodgate, second contact is bonded with first contact, the rear insertion of the moving contact End is inserted into the slot, is realized and is powered；

When the lever mechanism is pulled to separating brake, second contact and first contact separation, the rear insertion of the moving contact End is detached from the slot, realizes power-off；

The rear insertion end that the stroke that first contact and second contact separate or be closed is greater than the moving contact be detached from or It is inserted into the stroke of the slot.

2. dual-interruption point breaker dynamic contact mechanism according to claim 1, which is characterized in that the rear end of static contact after described Equipped with two pieces of symmetrical clamping plates, the front end of two pieces of clamping plates is respectively equipped with arc panel, the front ends of two pieces of arc panels it Between gap form the slot.

3. dual-interruption point breaker dynamic contact mechanism according to claim 2, which is characterized in that on two pieces of clamping plates respectively Equipped with limiting through hole, the spring of open annular passes through two limiting through hole, and two free ends of the spring are born against In the outside of the arc panel.

4. dual-interruption point breaker dynamic contact mechanism according to claim 3, which is characterized in that two freedom of the spring End respectively forwardly extends the compressed part for being equipped with semicircle or arc.

5. dual-interruption point breaker dynamic contact mechanism according to claim 1, which is characterized in that the connecting plate includes successively The first connecting plate and the second connecting plate of connection, the rear static contact are detachably connected with second connecting plate.

6. dual-interruption point breaker dynamic contact mechanism according to claim 1, which is characterized in that the moving contact is far from described The side of second contact extends back equipped with protrusion, and the top surface of the rear static contact is equipped with the limit being adapted to the protrusion Slot.

7. dual-interruption point breaker dynamic contact mechanism according to claim 1, which is characterized in that the link mechanism includes upper Connecting rod and lower link, the lever mechanism include tripping and the lever that is rotatably arranged in the tripping, and the tripping passes through pin Axis is fixed on the shell of breaker.

8. dual-interruption point breaker dynamic contact mechanism according to claim 7, which is characterized in that the upper connecting rod rotation setting In the tripping, the lower link is rotatably arranged on the lower end of the upper connecting rod, the moving contact be rotatably arranged on it is described under The lower end of connecting rod.

9. dual-interruption point breaker dynamic contact mechanism according to claim 1, which is characterized in that the first contact inclination is set It sets, with horizontal plane at 1 °~20 ° of angle.