CN210778457U

CN210778457U - Breaker electromagnetic mechanism

Info

Publication number: CN210778457U
Application number: CN201921790076.3U
Authority: CN
Inventors: 王慧德; 徐�明
Original assignee: Xiamen Guoyan Technology Co ltd
Current assignee: Xiamen Guoyan Technology Co ltd
Priority date: 2019-09-30
Filing date: 2019-10-23
Publication date: 2020-06-16
Anticipated expiration: 2029-10-23
Also published as: CN211016943U; CN210743893U; CN210778464U; CN212392188U

Abstract

The utility model discloses a breaker electromagnetic mechanism, which comprises a wiring board, a coil, a magnetic yoke, a static contact plate and an iron core assembly; two ends of the coil are respectively and electrically connected with the wiring board and the static contact plate, the static contact plate is fixed on the magnet yoke, and the static contact plate is provided with a section of U-shaped arc channel formed by bending; u-shaped arc says that the top is for the face of weld that is used for welding the stationary contact who meets with it, and U-shaped arc says and forms contained angle and contained angle broken line between adjacent arc surface and the face of weld of drawing that is close to the face of weld, and adjacent draw the cambered surface to go up the concave constant head tank of establishing, and the stationary contact is arranged in this constant head tank, and stationary contact partly is located the face of weld, and another part is located adjacent arc surface of drawing, and the bottom surface and the face of weld of constant head tank are in the coplanar and link to each other with the face. It has the following advantages: the arc resistance of the stationary contact and the heat dissipation performance of the coil are improved, the current carrying capacity is improved, and the occupied space is reduced.

Description

Breaker electromagnetic mechanism

Technical Field

The utility model relates to a circuit breaker field especially relates to a circuit breaker electromagnetic mechanism.

Background

The circuit breaker electromagnetic mechanism in the prior art comprises a wiring board, a coil, a magnetic yoke, a static contact plate and an iron core assembly; the both ends of coil are connected with advancing wiring board and quiet touch panel electricity respectively, quiet touch panel fixes on the yoke, quiet touch panel has one section U-shaped arc way of forming through bending, the face of weld that is used for welding the stationary contact that U-shaped arc way top meets for it, the U-shaped arc way is close to adjacent arc surface and the face of weld of drawing of face of weld and forms the contained angle between, the stationary contact is established on this face of weld completely, the coil is by the copper coiling on iron core subassembly, the width face of coil one end copper and the width face welding of advancing the wiring board, coating insulating layer and coil circle and circle on the coil between by the contact. The electromagnetic mechanism of the existing circuit breaker at least has the following disadvantages: 1. the space is reserved between the static contact and the U-shaped arc channel, the arc generated by the static contact cannot jump to the arc striking surface at a higher speed, and the arc resistance of the static contact is limited; 2. the heat dissipation capability of the coil is insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a circuit breaker electromagnetic mechanism, it has overcome in the background art the not enough of prior art.

The utility model provides a technical scheme that its technical problem adopted is:

a breaker electromagnetic mechanism comprises a wiring board, a coil, a magnetic yoke, a static contact plate and an iron core assembly; two ends of the coil are respectively and electrically connected with the wiring board and the static contact plate, the static contact plate is fixed on the magnet yoke, and the static contact plate is provided with a section of U-shaped arc channel formed by bending; u-shaped arc says that the top is for the face of weld that is used for welding the stationary contact who meets with it, and U-shaped arc says and forms contained angle and contained angle broken line between adjacent arc surface and the face of weld of drawing that is close to the face of weld, should adjacent draw the cambered surface to go up the concave constant head tank of establishing, and the stationary contact is arranged in this constant head tank, and stationary contact partly is located the face of weld, and another part is located adjacent arc surface of drawing, and the bottom surface and the face of weld of constant head tank are in the coplanar and link to each other with the face of.

In one embodiment: the included angle broken line is positioned in the middle of the static contact.

In one embodiment: an included angle is formed between the two arc striking surfaces of the U-shaped arc path.

In one embodiment: the wiring board is connected with the coil through welding, and the welding surface of the wiring board and the coil is positioned on the thickness surface of the wiring board.

In one embodiment: the thickness surface is located on the thickness surface on one side in the width direction of the wiring board.

In one embodiment: the turns of the coil have gaps between them.

In one embodiment: the coil is formed by winding a bare copper plate.

In one embodiment: the coil is formed by winding a silver-plated copper plate.

Compared with the background technology, the technical scheme has the following advantages:

1. through set for the constant head tank on the arc surface that draws adjacent with the face of weld, the stationary contact is established in the constant head tank, partly is located the face of weld, another part is located adjacent draw the face of weld, the stationary contact is located the linking position of drawing the face of arc and face of weld, can reduce the distance/segment difference between stationary contact and the drawing the face of arc, be favorable to electric arc jump, make electric arc can shift to drawing the face from the stationary contact fast on, both improve the arc-resistant ability of stationary contact, reduce the ablation of electric arc to the stationary contact, effectively protect the stationary contact.

2. The welding surface of the wiring board and the coil is arranged on the thickness surface of the wiring board, so that the width surface of the wiring board perpendicular to the thickness surface can be regarded as the extension of the coil (even 1/4 circles), the excitation strength of the coil is enhanced, the use of coil materials is reduced, the occupied space of an electromagnetic mechanism is further reduced, and the conductive sectional area of the coil can be allowed to be larger.

3. Gaps are formed between turns of the coil, the coil is formed by winding a bare copper plate or a silver-plated copper plate, the heat dissipation performance of the coil is improved, the coil is easy to process, and the current carrying capacity of the coil can be improved.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is one of the schematic structural diagrams of the stationary contact plate.

Fig. 2 is a second schematic structural diagram of the stationary contact plate.

Figure 3 is a schematic diagram of the structure of an inlet patch panel.

Fig. 4 is an assembly diagram of the wiring board, the coil and the static contact plate.

Fig. 5 is a schematic structural diagram of an electromagnetic mechanism.

Detailed Description

Referring to fig. 1 to 5, an electromagnetic mechanism of a circuit breaker includes a wiring board 10, a coil 20, a yoke 30, a stationary contact plate 40, and a core assembly 50; the two ends of the coil 20 are respectively electrically connected with the wiring board 10 and the static contact plate 40, the static contact plate 40 is fixed on the magnetic yoke 30, a fixing hole 43 for fixing the static contact plate with the magnetic yoke 30 is arranged on the static contact plate 10, the static contact plate 40 is provided with a section of U-shaped arc path 41 formed by bending, and an included angle is formed between two arc striking surfaces of the U-shaped arc path 41; a welding surface 42 connected with the U-shaped arc path 41 and used for welding the static contact 60 is arranged above the U-shaped arc path 41, and an included angle broken line 412 are formed between the adjacent arc ignition surfaces of the U-shaped arc path 41 close to the welding surface and the welding surface 42.

The adjacent arc leading surfaces are concavely provided with positioning grooves 411, the static contact 60 is arranged in the positioning grooves 411, one part of the static contact 60 is positioned on the welding surface 42, the other part of the static contact 60 is positioned on the adjacent arc leading surfaces, and the bottom surfaces of the positioning grooves 411 and the welding surface 42 are positioned on the same plane and are connected with the welding surface 42. Like this, stationary contact 60 just is located the linking position of arc ignition face and welding face 42, can reduce the distance/segment difference between stationary contact 60 and the arc ignition face, is favorable to the electric arc jump for electric arc can shift to the arc ignition face from stationary contact 60 fast on, both improved stationary contact 60's arc-resistant ability, reduce the electric arc to stationary contact 60's ablation, effectively protect stationary contact 60. Preferably, the angled fold line 412 is disposed at an intermediate position of the stationary contact 60.

When the breaker is switched on, current sequentially passes through the wiring board 10, the coil 20 and the welding surface 42 of the static contact plate 40 and then flows downwards through the static contact 60 to flow out of the movable contact, the U-shaped arc path 41 on the static contact plate 40 forms a strong U-shaped magnetic blow-out current path, a strong magnetic field can be generated to repel the movable contact when short circuit breaking occurs, the breaking speed of a mechanism is accelerated, and the breaking capacity of the breaker is improved.

The wiring board 10 and the coil 20 are connected by welding, and the welding surface of the wiring board 10 and the coil 20 is positioned on the thickness surface 11 of the wiring board 10, so that the width surface 12 of the wiring board 10 perpendicular to the thickness surface 11 can be regarded as the extension of the coil 20 (even 1/4 circles are extended), the excitation strength of the coil 20 is enhanced, and the occupied space of the electromagnetic mechanism is further reduced. In general, the thickness surface 11 is located on one side in the width direction of the wiring board 10.

Gaps are formed among turns of the coil 20, so that the heat dissipation performance of the coil 20 can be improved; because the coil 20 has gaps between turns, the coil 20 can be made by winding bare copper plates, so that the coil is simpler to manufacture, and in order to improve the current carrying capacity of the coil, the coil can also be made by winding silver-plated copper plates.

The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.

Claims

1. A breaker electromagnetic mechanism comprises a wiring board, a coil, a magnetic yoke, a static contact plate and an iron core assembly; two ends of the coil are respectively and electrically connected with the wiring board and the static contact plate, the static contact plate is fixed on the magnet yoke, and the static contact plate is provided with a section of U-shaped arc channel formed by bending; the method is characterized in that: u-shaped arc says that the top is for the face of weld that is used for welding the stationary contact who meets with it, and U-shaped arc says and forms contained angle and contained angle broken line between adjacent arc surface and the face of weld of drawing that is close to the face of weld, should adjacent draw the cambered surface to go up the concave constant head tank of establishing, and the stationary contact is arranged in this constant head tank, and stationary contact partly is located the face of weld, and another part is located adjacent arc surface of drawing, and the bottom surface and the face of weld of constant head tank are in the coplanar and link to each other with the face of.

2. The circuit breaker electromagnetic mechanism of claim 1, wherein: the included angle broken line is positioned in the middle of the static contact.

3. The circuit breaker electromagnetic mechanism of claim 1, wherein: an included angle is formed between the two arc striking surfaces of the U-shaped arc path.

4. The circuit breaker electromagnetic mechanism of claim 1, wherein: the wiring board is connected with the coil through welding, and the welding surface of the wiring board and the coil is positioned on the thickness surface of the wiring board.

5. The circuit breaker electromagnetic mechanism of claim 4, wherein: the thickness surface is located on the thickness surface on one side in the width direction of the wiring board.

6. The circuit breaker electromagnetic mechanism of claim 1, wherein: the turns of the coil have gaps between them.

7. The circuit breaker electromagnetic mechanism of claim 6, wherein: the coil is formed by winding a bare copper plate.

8. The circuit breaker electromagnetic mechanism of claim 6, wherein: the coil is formed by winding a silver-plated copper plate.