CN207938556U - A kind of breaker dual-breakpoint multiple-piece moving contact - Google Patents
A kind of breaker dual-breakpoint multiple-piece moving contact Download PDFInfo
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- CN207938556U CN207938556U CN201721437349.7U CN201721437349U CN207938556U CN 207938556 U CN207938556 U CN 207938556U CN 201721437349 U CN201721437349 U CN 201721437349U CN 207938556 U CN207938556 U CN 207938556U
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- feeler lever
- movable
- contact
- movable feeler
- floating axle
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Abstract
The utility model discloses a kind of breaker dual-breakpoint multiple-piece moving contact, which includes movable feeler lever, spring, movable axis, floating axle and contact base；Multi-disc movable feeler lever is penetrated by activity shaft mounting hole sequence in two movable axis, floating axle is arranged in the both sides of movable feeler lever, the installation position that the both ends of floating axle correspond to contact base is open mounting groove, movable feeler lever on contact base is in pairs, two springs are equipped between two panels movable feeler lever in one group of movable feeler lever, both ends of the spring is connected on movable axis and floating axle, spring is in tensional state, movable feeler lever on movable axis is connected into a component by spring using floating axle, the component is relied on and is linked together with contact base by the pulling force of spring, component is in floating state with contact base；The utility model can play the role of improving KA Rms and prevent contact reprimand from opening falling, while the contact area for increasing contact reduces circuit breaker contact persistence, and the external surface area for increasing movable feeler lever reduces the kelvin effect of electric current.
Description
Technical field
The utility model belongs to breaker structure technical field, and in particular to a kind of multiple-piece moving contact knot of breaker
Structure.
Background technology
Breaker is the Important Components of distribution system.Make as the control such as motor, illumination, electric distribution protection element
With there is overload and the defencive functions such as short circuit, motor, circuit and power-supply device can be protected without damage or reduce damage.
Breaker can be divided into contact system, operating mechanism and tripping system this three parts by its structure.
Especially contact system is the core component of breaker, plays the on-off and defencive function of electric current.Breaker
The contact resistance of itself mainly determines by contact system, contact resistance between moving contact and static contact in contact system and connects
Contacting surface product plays an important role to the performance of the KA Rms of breaker.The size of the contact surface of moving contact and static contact and
Contact has direct influence to contact resistance.In traditional breaker with double breaks and plastic case, due to movable feeler lever often only with
The structure of one chip, only a piece of movable contact and stationary contact point contact between each breakpoint.It is well known that when face is contacted with face, by
Flatness and finish problem in face, only a line or the multiple points often contacted.So one chip contact can not be accomplished
The contact of more points makes the shortcomings of contacting section is smaller, and contact resistance is larger.
In circuit, when alternating current passes through conductor, electric current will focus on conductive surface and flow through, and this phenomenon is called collection
Skin effect or Kelvin effect.When being that current or voltage is conducted in the conductor with the higher electronics of frequency, total conductor table can be gathered in
Layer, rather than be evenly distributed in the sectional area of entire conductor.So one chip movable feeler lever causes conductor center due to kelvin effect
The waste in section.
Breaker serves as protective effect when short circuit occurs for circuit, such as when generating especially big short circuit current, because of short-circuit electricity
Stream generates larger electric repulsion more than the KA Rms of breaker itself between the moving contact and static contact of breaker,
Moving contact is set to be detached with static contact.But electric repulsion generate moment strength it is larger, moving contact reprimand open after due to operating mechanism respond
Time can not keep up with, and quickly fallen after rise after so that moving contact reprimand is opened, be again switched on circuit, cause short circuit current to rise again and connect again
Enter circuit system, make to generate arc reignition between moving contact and static contact, arc temperature is high to cause touching for moving contact and static contact
Point melting welding or even scaling loss generate greatly damage to breaker and circuit system.
Utility model content
In view of this, the utility model provides a kind of breaker dual-breakpoint multiple-piece moving contact, it can be by few as possible
Structure member play the role of improving KA Rms and prevent contact reprimand from opening falling, while improving the contact surface of contact
The kelvin effect that product reduces circuit breaker contact persistence, reduces electric current.
A kind of breaker dual-breakpoint multiple-piece moving contact, the moving contact include movable feeler lever, spring, movable axis, floating axle and
Contact base；
The movable feeler lever is laminated structure, and movable contact is welded at both ends, and there are two symmetrical movable axis to pacify on movable feeler lever
Fill hole；
Movable feeler lever described in multi-disc is penetrated by activity shaft mounting hole sequence in two movable axis, and the floating axle setting is dynamic
The both sides of feeler lever, it is open mounting groove, the movable feeler lever two on contact base that the both ends of floating axle, which correspond to the installation position of contact base,
Two 1 groups, it is equipped with two springs between the two panels movable feeler lever in one group of movable feeler lever, both ends of the spring is connected to movable axis and floating
On moving axis, spring is in tensional state, and the movable feeler lever on movable axis is connected into a component, the component by spring using floating axle
It links together with contact base by the pulling force by spring, component is in floating state with contact base；Two movable axis and two
Spatially parallelogram is laid out floating axle, and movable axis and floating axle are located on the vertex of diagonal of a parallelogram.
Further, it is clearance fit, every group of movable feeler lever between the activity shaft mounting hole on the floating axle and movable feeler lever
Between rotational variations be compensated by the gap in axis and hole.
Further, it is machined with semi-cylindrical hill and concave inward structure on the edge of the movable feeler lever, dynamic when movable feeler lever touches
When point is rotated by electric repulsion, which slides into after jacking up floating axle in concave inward structure, and floating axle exists
Make movable feeler lever that can not reset under the action of spring force.
Advantageous effect：
1, it is one group that the utility model, which uses multiple-piece movable feeler lever structure, each two movable feeler lever, is not had between every group of movable feeler lever
It is relevant, make mutually to rotate and not interfered, the rotational variations between every group of movable feeler lever play compensation by the gap in axis and hole, make more
Piece movable feeler lever both ends can balance the contact of both ends movable contact and stationary contact when being contacted with stationary contact bar, keep contact more preferable, together
When increase contact area and reduce contact resistance.
2, the movable feeler lever structure of the utility model multiple-piece considerably increases the table of conductor under identical conductive cross-sectional area
Area, the section waste of conductor central part caused by effectively reducing kelvin effect, accelerates kelvin effect and generates heat
Distribute.
3, since every two panels movable feeler lever uses one group of spring, spring to be mounted between movable feeler lever, make feeler lever upper contact width
Volume smaller in the case of constant may be designed to the piece number of more movable feeler levers；The electric repulsion for acting on an on piece originally is set to have
Decomposing in multi-disc for effect, effectively reduces contact resistance, because contact resistance plays emphatically the performance for being resistant to short circuit current in short-term
It acts on, due to the reduction of contact resistance, so substantially increasing the current value of KA Rms.
4, the intermediate position of the movable feeler lever of the utility model devises semi-circular protrusion and concave inward structure, and movable feeler lever is in short circuit
Reprimand is opened when electric current is more than itself KA Rms, since the concave inward structure of movable feeler lever middle section can be caught in floating axle,
It can make to fall after rise after preventing movable feeler lever reprimand from opening and be again switched on circuit, cause short circuit current to rise again and access circuit system again
Cause the damage of circuit system.
Description of the drawings
Fig. 1 is the schematic diagram of the utility model installation inside the housing；
Fig. 2 is the movable feeler lever and contact base installation relation schematic diagram of the utility model；
Fig. 3 is the structural schematic diagram of the utility model movable feeler lever
Fig. 4 is that the raised semicircle of the utility model movable feeler lever middle section is caught in the status diagram of floating axle；
Wherein, 1- movable feeler levers, 2- springs, 3- movable axis, 4- floating axles, 5- contact bases, 6- movable contacts, 7- stationary contacts bar, 8-
Stationary contact, 9- shells.
Specific implementation mode
With reference to the accompanying drawings and examples, the utility model is described in detail.
As shown in Fig. 2, the utility model provides a kind of breaker dual-breakpoint multiple-piece moving contact, which includes
Movable feeler lever 1, spring 2, movable axis 3, floating axle 4 and contact base 5；
As shown in Fig. 3, single movable feeler lever 1 is laminated structure, and movable contact 6 is welded at both ends, on movable feeler lever 1 there are two
Symmetrical activity shaft mounting hole；In addition, it is machined with semi-cylindrical hill and concave inward structure on the edge of 1 both sides of movable feeler lever,
Multi-disc movable feeler lever 1 is penetrated by activity shaft mounting hole sequence in two movable axis, on floating axle 4 and movable feeler lever 1
It is clearance fit between activity shaft mounting hole, the rotational variations between every group of movable feeler lever 1 are compensated by the gap in axis and hole.It is floating
Moving axis 4 is arranged in the both sides of movable feeler lever, and it is open mounting groove, contact that the both ends of floating axle 4, which correspond to the installation position of contact base 5,
Movable feeler lever 1 on seat 5 in pairs, is equipped with two springs 2, both ends of the spring point between the two panels movable feeler lever 1 in one group of movable feeler lever
It is not connected on movable axis and floating axle, spring 2 is in tensional state, and spring 2 utilizes floating axle 4 by the movable feeler lever on movable axis
1 connects into a component, which, which relies on, is linked together by the pulling force of spring 2 with contact base 5, and component is in contact base 5
Quick condition；Spatially parallelogram is laid out for two movable axis 3 and two floating axles 4, movable axis 3 and floating axle 4
In on the vertex of diagonal of a parallelogram.
As shown in Fig. 1, the moving contact of the utility model is mounted on the enclosure of breaker, shell 9 by contact base 5
Inside is fixedly connected with stationary contact bar corresponding with movable contact on movable feeler lever 17 and stationary contact 8, in normal operation, movable feeler lever
Movable contact 6 on 1 is contacted with the stationary contact 8 on stationary contact bar 7, and each two movable feeler lever 1 is one group, is not associated between each other,
Make mutually to rotate and not interfered, rotational variations play compensation by the gap in axis and hole between every group；When movable feeler lever movable contact by
When rotating to electric repulsion, which slides into after jacking up floating axle in concave inward structure, and floating axle is in spring
Make movable feeler lever that can not reset under the action of power, as shown in Fig. 4.
In conclusion the above is only the preferred embodiments of the present utility model only, it is not intended to limit the utility model
Protection domain.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all wrap
Containing being within the protection scope of the utility model.
Claims (3)
1. a kind of breaker dual-breakpoint multiple-piece moving contact, which is characterized in that the moving contact include movable feeler lever, spring, movable axis,
Floating axle and contact base；
The movable feeler lever is laminated structure, and movable contact is welded at both ends, and there are two symmetrical activity shaft mounting holes on movable feeler lever；
Movable feeler lever described in multi-disc is penetrated by activity shaft mounting hole sequence in two movable axis, and the floating axle is arranged in movable feeler lever
Both sides, the installation position that the both ends of floating axle correspond to contact base is open mounting groove, the movable feeler lever on contact base two-by-two one
Group is equipped with two springs between the two panels movable feeler lever in one group of movable feeler lever, and both ends of the spring is connected to movable axis and floating axle
On, spring is in tensional state, and the movable feeler lever on movable axis is connected into a component by spring using floating axle, which relies on
It is linked together by the pulling force and contact base of spring, component is in floating state with contact base；Two movable axis and two floatings
Spatially parallelogram is laid out axis, and movable axis and floating axle are located on the vertex of diagonal of a parallelogram.
2. breaker dual-breakpoint multiple-piece moving contact as described in claim 1, which is characterized in that the floating axle and movable feeler lever
On activity shaft mounting hole between be clearance fit, the rotational variations between every group of movable feeler lever are mended by the gap in axis and hole
It repays.
3. breaker dual-breakpoint multiple-piece moving contact as claimed in claim 1 or 2, which is characterized in that the side of the movable feeler lever
Semi-cylindrical hill and concave inward structure are machined on edge, when the movable contact of movable feeler lever is rotated by electric repulsion, the semicircle
Bulge-structure slides into after jacking up floating axle in concave inward structure, and floating axle makes movable feeler lever be maintained at opening under spring force
Position resets again when mechanism action, is fallen after rise after preventing especially big short circuit current from contact reprimand being made to open and causes arc reignition or rising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721437349.7U CN207938556U (en) | 2017-11-01 | 2017-11-01 | A kind of breaker dual-breakpoint multiple-piece moving contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721437349.7U CN207938556U (en) | 2017-11-01 | 2017-11-01 | A kind of breaker dual-breakpoint multiple-piece moving contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207938556U true CN207938556U (en) | 2018-10-02 |
Family
ID=63644546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721437349.7U Active CN207938556U (en) | 2017-11-01 | 2017-11-01 | A kind of breaker dual-breakpoint multiple-piece moving contact |
Country Status (1)
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|---|---|
| CN (1) | CN207938556U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799367A (en) * | 2017-11-01 | 2018-03-13 | 常熟瑞特电气股份有限公司 | A kind of breaker dual-breakpoint multiple-piece moving contact |
-
2017
- 2017-11-01 CN CN201721437349.7U patent/CN207938556U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799367A (en) * | 2017-11-01 | 2018-03-13 | 常熟瑞特电气股份有限公司 | A kind of breaker dual-breakpoint multiple-piece moving contact |
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