CN212783334U - Coil structure, electromagnetic mechanism and circuit breaker - Google Patents

Abstract

The utility model discloses a coil structure, an electromagnetic mechanism and a circuit breaker, wherein the coil structure is provided with a wiring part, a coil part and a static contact plate part which are integrally formed; the electromagnetic mechanism comprises a magnet yoke structure, an iron core component and a coil structure, wherein the coil part of the coil structure is wound on the iron core component; the circuit breaker is equipped with the electromagnetic mechanism. It has the following advantages: the performance is improved, and the cost is reduced.

Description

Coil structure, electromagnetic mechanism and circuit breaker

Technical Field

The utility model relates to a coil structure, electromagnetic mechanism and circuit breaker.

Background

The circuit breaker can automatically cut off a circuit when faults such as overcurrent, overload, short circuit and the like occur to the circuit, and plays a role in protection. When the circuit is short-circuited or seriously overcurrent occurs, overlarge current flows through the electromagnetic mechanism of the circuit breaker, and a coil of the electromagnetic mechanism generates a huge magnetic field to enable the movable iron core to move so as to trigger the tripping mechanism to trip.

Referring to fig. 1 and 2, the conventional electromagnetic mechanism includes a yoke structure 40, a core assembly 50, and a coil structure 60, where the coil structure 60 includes a wiring board 61 (an inlet terminal of a circuit breaker) connected to a power supply side or a load side, a stationary contact plate 62 and a coil 63 provided with a stationary contact, the wiring board 61, the stationary contact plate 62, and the coil 63 are connected by welding to form a welding point, the stationary contact plate 62 is provided with a stationary contact 621 and forms an arc guide path 622, and the arc guide path 622 extends to an upper end of an arc extinguishing chamber. The magnetic yoke structure 40 has only a magnetic conductive function, and in order to increase the magnetic conductive capability, a magnetism increasing sheet may be additionally provided. The iron core assembly 50 includes a movable iron core 51, a stationary iron core 52, a push rod 53, an iron core spring (not shown), and an iron core sleeve 54.

The existing coil structure includes the following disadvantages:

(1) need wiring board, coil and three spare parts of stationary contact board when making into coil structure, the part is many, causes the product cost height, and the quality management and control degree of difficulty is big, and the product quality problem appears easily.

(2) Problems caused by forming the welding point by welding are: 1) the welding process has high difficulty, and defects such as insufficient cold solder, insufficient welding area, deformation of welding joints and the like are easy to occur, and the defects easily cause serious problems such as falling of circuit breaker parts, local heating and the like; 2) the welding can be reliably carried out only by using the solder as an intermediate medium, but the resistivity of the solder is generally larger than that of copper (a wiring board, a coil and a static contact plate are made of copper), so that an obvious heating point is formed on a welding point; 3) when welding, the welding part is easily deformed by the welding electrode, so that the local conductive sectional area is reduced, and the local heating is overlarge due to the formation of a conductive bottleneck. The circuit breaker shell is easy to melt due to excessive local heating, and even a fire disaster is caused; 4) the position deviation or deformation of parts is easy to occur during welding processing, so that the whole electromagnetic mechanism part is deformed, the part is difficult to assemble into a shell of the circuit breaker, or the function of the part is influenced by abnormal extrusion of the shell during assembly; 4) the welding process greatly affects the production efficiency of the circuit breaker, and the production cost of the circuit breaker is greatly increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coil structure, electromagnetic mechanism and circuit breaker that help promoting performance and economy, it has overcome in the background art the not enough of prior art.

The utility model provides one of the technical scheme that its technical problem adopted is:

a coil structure has a wiring portion, a coil portion and a stationary contact plate portion which are integrally formed; one end of the coil part is connected with the wiring part, the other end of the coil part is connected with the static contact plate part, the wiring part is used for being electrically connected with the power supply side or the load side, and the static contact plate part is used for arranging a static contact.

In one embodiment: the coil structure is a sheet metal part.

The utility model provides a second of the technical scheme that its technical problem adopted:

an electromagnetic mechanism comprises a magnetic yoke structure, an iron core component and a coil structure according to one of the technical schemes, wherein the coil part of the coil structure is wound on the iron core component.

In one embodiment: this yoke structure has integrated into one piece's magnetic conduction portion, leads arc portion and quiet iron core portion, and this magnetic conduction portion constitutes electromagnetic path, and this arc portion of leading constitutes leads the arc path, and this quiet iron core portion is used for cooperating with the movable core of iron core subassembly, and this quiet iron core portion is equipped with the through-hole with iron core subassembly complex.

In one embodiment: the static iron core comprises an end piece and a side piece connected to the side edge of the end piece, the through hole is formed in the end piece, and the side piece is arranged around the axis of the through hole and is coaxial with the through hole.

In one embodiment: the arc guiding part is provided with a U-shaped arc guiding section.

In one embodiment: the magnetic conduction part, the arc conduction part and the static iron core part are made of iron sheet metal parts.

In one embodiment: the side plates are symmetrically distributed around the axis center of the through hole.

This iron core subassembly includes the coaxial iron core that moves, push rod and the spring that sets up, this push rod pass the through-hole and with through-hole sliding connection, this spring around establish on the push rod and with push rod sliding connection, the both ends of this spring push up respectively quiet iron core portion and push rod so that the push rod with move the iron core and keep leaning on.

The third technical scheme of the utility model for solving the technical problem is:

a circuit breaker is provided with the electromagnetic mechanism according to the second technical scheme, and the arc guide portion of the magnetic yoke structure is located between the static contact plate portion and the arc extinguish chamber and extends to the arc extinguish chamber.

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

1. the coil structure has the wiring portion, the coil portion and the static contact plate portion which are integrally formed, the difficulty of a production process is reduced, a series of defects caused by an original welding mode are overcome, and the production efficiency is greatly improved.

2. The magnetic yoke structure has the magnetic conduction part, the arc guide part and the static iron core part which are integrally formed, has the magnetic conduction function (namely the function of the magnetic conduction part) of the magnetic yoke of the existing magnetic yoke structure, is compatible with the functions of the static iron core and the arc guide, meets the functional requirements and reduces the number of parts.

3. The arc portion of leading of yoke structure extends to the explosion chamber (specifically the explosion chamber upper end) by the stationary contact of stationary contact board portion, and because this yoke structure is the iron material, consequently can strengthen the magnetism of electric arc blow intensity between the initial contact of sound contact disconnection well, need not additionally to increase the magnetic disk (current arc path and stationary contact board integrated into one piece lead, the stationary contact board is the copper product, in order to increase magnetism blow intensity, has to increase the magnetic disk of iron on leading the arc path).

4. The overall part count is reduced; the existing electromagnetic mechanism consists of 11 parts including a wiring board, a coil, a static contact plate, a static contact, a movable iron core, a static iron core, a push rod, an iron core spring, an iron core sleeve, a magnetic yoke and a magnetizing iron plate, the electromagnetic mechanism consists of 6 parts including an integrated coil, an integrated magnetic yoke, a movable iron core, a push rod, an iron core spring and a static contact, and the electromagnetic mechanism of the scheme has 5 fewer parts than the existing electromagnetic mechanism, greatly reduces the quality control difficulty and the control workload of the circuit breaker, reduces the material cost and the production cost of the circuit breaker, and improves the quality stability of a circuit breaker product.

Drawings

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

Fig. 1 is a schematic diagram of a prior art electromagnetic mechanism.

FIG. 2 is a cross-sectional view of a prior art electromagnetic mechanism.

Fig. 3 is one of schematic diagrams of a coil structure.

Fig. 4 is a second schematic diagram of a coil structure.

Fig. 5 is a schematic view of another coil configuration.

Fig. 6 is a schematic diagram of yet another coil structure.

Fig. 7 is one of schematic diagrams of a yoke structure.

Fig. 8 is a third schematic diagram of the structure of the magnetic yoke.

FIG. 9 is one of the schematic diagrams of an electromagnetic mechanism.

FIG. 10 is a second schematic diagram of the electromagnetic mechanism.

Fig. 11 is a cross-sectional view of an electromagnetic mechanism.

Fig. 12 is a structural sectional view of the circuit breaker.

Detailed Description

Referring to fig. 12, a circuit breaker is provided with an electromagnetic mechanism 100 for performing a circuit switching function, and referring to fig. 9 to 11, the electromagnetic mechanism 100 includes a coil structure 10, an iron core assembly 20, and a yoke structure 30.

Referring to fig. 3 to 6, the coil structure 10 has the wiring portion 11, the coil portion 12, and the stationary plate portion 13 which are integrally formed; one end of the coil portion 12 is connected to the wire connecting portion 11, and the other end of the coil portion 12 is connected to the stationary contact plate portion 13. The wiring portion 11 is used for electrical connection with the power source side or the load side, the stationary contact plate portion 13 is used for arranging and providing the stationary contact 14, and the coil portion 12 of the coil structure 10 is wound on the core assembly 20. Namely, the coil structure is designed without welding points, and a series of defects caused by the welding points are eliminated. In this embodiment, the coil structure 10 is a sheet metal part, specifically a copper sheet metal part. The coil part of the coil structure is of a circular spiral wire structure, and the specific modeling structure can be shown in fig. 3 to 6, and the coil parts with three different modeling are shown.

Referring to fig. 7 and 8, the yoke structure 30 includes a magnetic conductive portion 31, an arc conductive portion 32, and a stationary core portion 33, which are integrally formed. The magnetic conductive part 31 constitutes an electromagnetic path, the arc conductive part 32 constitutes an arc conductive path, the static iron core part 33 is used for matching with the movable iron core of the iron core assembly 20, and the static iron core part 33 is provided with a through hole 3311 matching with the iron core assembly 20.

The stationary core 33 includes an end piece 331 and a side piece 332 attached to a side edge of the end piece 331, the through hole 3311 being provided in the end piece 331, the side piece 332 being disposed around an axis of the through hole 3311 and being coaxial with the through hole 3311. Specifically, there are at least two side pieces 332, and the at least two side pieces 332 are symmetrically distributed around the axis center of the through hole 3311.

The arc guiding portion 32 has a U-shaped arc guiding section, and the arc guiding portion 32 is located between the stationary contact plate portion 13 and the arc extinguishing chamber 200 and extends to the arc extinguishing chamber 200.

In this embodiment, the magnetic conductive portion 31, the arc conductive portion 32, and the static iron core portion 33 are made of iron sheet metal. The iron arc guide part 32 replaces a copper arc guide path on the existing static contact plate, so that the initial magnetic blow force when the moving contact and the static contact are separated is greatly enhanced, the electric arc transfer speed between electric shocks can be accelerated, and the short circuit breaking capacity of the circuit breaker is improved.

The magnetic yoke structure 30 integrates the magnetic conduction function of the magnetic conduction part 31, the arc striking function of the arc conduction part 32 and the function of the static iron core part 33 serving as a static iron core, and the magnetic conduction capability and the arc conduction capability of the magnetic yoke structure are greatly enhanced due to the adoption of the iron material, so that the magnetic yoke structure also integrates the functions of the magnetism increasing sheets.

The core assembly 20 includes a movable core 21, a push rod 22 and a spring (not shown), the movable core 21, the push rod 22 and the spring are coaxially disposed, the push rod 22 passes through the through hole 3111 and is slidably connected to the through hole 3111, the spring is wound on the push rod 22 and is slidably connected to the push rod 22, and two ends of the spring respectively abut against the stationary core 33 and the push rod 22 so as to keep the push rod 22 and the movable core 21 abutting against each other.

The coil structure 10 and the magnetic yoke structure 30 are manufactured in an integrated mode, the total number of parts for assembling the electromagnetic mechanism is reduced, the quality reliability and the batch production stability of products are improved, material waste caused by welding is eliminated, and the material consumption is reduced.

The electromagnetic mechanism 100 and the circuit breaker greatly reduce the number of parts used for forming the product, save the whole material consumption and effectively save the cost of the product under the condition of meeting the performance and even improving the performance.

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 (9)

1. A coil structure characterized by: has an integrally formed wiring portion, a coil portion and a stationary contact plate portion; one end of the coil part is connected with the wiring part, the other end of the coil part is connected with the static contact plate part, the wiring part is used for being electrically connected with the power supply side or the load side, and the static contact plate part is used for arranging a static contact.

2. An electromagnetic mechanism, characterized by: comprising a yoke structure, a core assembly and a coil structure according to claim 1, the coil portion of the coil structure being wound around the core assembly.

3. An electromagnetic mechanism according to claim 2, wherein: this yoke structure has integrated into one piece's magnetic conduction portion, leads arc portion and quiet iron core portion, and this magnetic conduction portion constitutes electromagnetic path, and this arc portion of leading constitutes leads the arc path, and this quiet iron core portion is used for cooperating with the movable core of iron core subassembly, and this quiet iron core portion is equipped with the through-hole with iron core subassembly complex.

4. An electromagnetic mechanism according to claim 3, wherein: the static iron core comprises an end piece and a side piece connected to the side edge of the end piece, the through hole is formed in the end piece, and the side piece is arranged around the axis of the through hole and is coaxial with the through hole.

5. An electromagnetic mechanism according to claim 3, wherein: the arc guiding part is provided with a U-shaped arc guiding section.

6. An electromagnetic mechanism according to claim 3, wherein: the magnetic conduction part, the arc conduction part and the static iron core part are made of iron sheet metal parts.

7. An electromagnetic mechanism according to claim 4, wherein: the side plates are symmetrically distributed around the axis center of the through hole.

8. An electromagnetic mechanism according to any one of claims 2 to 7, wherein: this iron core subassembly includes the coaxial iron core that moves, push rod and the spring that sets up, this push rod pass the through-hole and with through-hole sliding connection, this spring around establish on the push rod and with push rod sliding connection, the both ends of this spring push up respectively quiet iron core portion and push rod so that the push rod with move the iron core and keep leaning on.

9. A circuit breaker, characterized by: the electromagnetic mechanism of any one of claims 7 to 8 is provided with the arc guiding portion of the yoke structure being located between the stationary plate portion and the arc extinguishing chamber and extending to the arc extinguishing chamber.

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