CN212517092U

CN212517092U - Circuit breaker opening and closing contact mechanism and circuit breaker

Info

Publication number: CN212517092U
Application number: CN202022176789.XU
Authority: CN
Inventors: 魏文杰; 康帆; 许利战; 祁卫华
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-02-09
Anticipated expiration: 2030-09-28

Abstract

The utility model relates to a circuit breaker divide-shut brake contact mechanism and circuit breaker, contact mechanism includes L utmost point linkage module and N utmost point linkage module, L utmost point linkage module includes electromagnetic trip, clutch and L utmost point moving contact, be equipped with L utmost point static contact on the electromagnetic trip, the clutch is connected and lie in one side of L utmost point static contact to the L utmost point moving contact, N utmost point linkage module includes the wiring board, the linkage piece, N utmost point moving contact and elastic component, linkage piece fixed connection clutch, linkage piece and clutch are rotatory around first connecting axle jointly, be equipped with N utmost point static contact on the wiring board, the upper end of N utmost point moving contact is rotated and is connected first connecting axle, be equipped with the elastic component between the centre and the linkage piece of N utmost point moving contact. Compared with the prior art, the utility model simplifies the whole structure of the opening and closing contact mechanism and realizes the reduction of the volume; the N pole is ensured to be connected before being disconnected compared with the L pole in the circuit breaker, and the safety of the product is improved.

Description

Circuit breaker opening and closing contact mechanism and circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a circuit breaker divide-shut brake contact mechanism and circuit breaker are related to.

Background

The circuit breaker is a switch with automatic action, has the functions of overload, short circuit and leakage protection, and common circuit breakers are divided into an electronic type and an electromagnetic type. The 1P + N circuit breaker is a miniature circuit breaker comprising an L-pole (phase line) breaking unit and an N-pole (neutral line) breaking unit. The L pole circuit breaking unit is provided with an L pole linkage module, and the N pole circuit breaking unit is provided with an N pole linkage module. The existing 1P + N circuit breaker mainly has two structural forms of an assembled type and an integral type, the L pole and the N pole of the circuit breaker are generally arranged in one module in the integral type structure, and an action mechanism, a circuit board, a zero sequence transformer and the like are arranged in the other module, so that a product is compressed into two modules wide, and the size of the product is reduced.

For example, the chinese utility model application with publication number CN107146745A discloses an electronic leakage breaker, which is a typical integral structure of a 1P + N breaker. In the integral structure, the L pole and the N pole of the circuit breaker are arranged in one module, and the electric leakage action mechanism, the circuit board, the zero sequence transformer and the like are arranged in the other module, so that the product is compressed into two modules with wide width, and the volume of the product is reduced. However, this structure has the following problems: 1. the L-pole linkage module and the N-pole linkage module are complex in structure, the space requirement of a product is still limited to a certain extent, and the product volume is still large. 2. The components in the confined space are overloaded and crowded, which necessarily results in a change (usually a deterioration) in parameters related to the safe current carrying capacity, such as electrical clearance, and thus a reduction in the safe current carrying capacity.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circuit breaker divide-shut brake contact mechanism and circuit breaker in order to overcome the defect that above-mentioned prior art exists, simplify the structure of N utmost point linkage module and the extremely linkage module of L, easily production and product transformation ensure the safety clearance between sound contact simultaneously.

The purpose of the utility model can be realized through the following technical scheme:

a breaker opening and closing contact mechanism comprises an L-pole linkage module and an N-pole linkage module, wherein the L-pole linkage module comprises an electromagnetic release, a linkage and an L-pole moving contact, the electromagnetic release is provided with an L-pole fixed contact, the L-pole moving contact is connected with the linkage and is positioned on one side of the L-pole fixed contact, the L-pole moving contact contacts or separates the L-pole fixed contact under the action of the linkage, the N-pole linkage module comprises a wiring board, a linkage block, an N-pole moving contact and an elastic piece, the linkage block is fixedly connected with the linkage, the linkage block and the linkage jointly rotate around a first connecting shaft, the wiring board and the electromagnetic release are arranged side by side, the N-pole fixed contact is arranged on the wiring board, the upper end of the N-pole moving contact is rotatably connected with the first connecting shaft, and the elastic piece is arranged between the middle of the N-pole moving contact and the linkage block; the contact of the N-pole static contact and the contact of the L-pole static contact are arranged in a coplanar manner, an included angle formed by the N-pole static contact and the N-pole moving contact is smaller than an included angle formed by the L-pole static contact and the L-pole moving contact, and the distance from the contact of the N-pole static contact to the first connecting shaft is equal to the distance from the contact of the N-pole moving contact to the first connecting shaft; the distance from the contact of the L-pole static contact to the first connecting shaft is equal to the distance from the contact of the L-pole moving contact to the first connecting shaft; the distance from the contact of the N-pole static contact to the first connecting shaft is greater than the distance from the contact of the L-pole static contact to the first connecting shaft;

when the linkage device is switched on, the linkage device drives the N-pole moving contact to contact with the N-pole static contact firstly through the linkage block, then the N-pole moving contact rotates around the first connecting shaft and compresses the elastic part, and the L-pole moving contact contacts with the L-pole static contact; when the brake is switched off, the electromagnetic release drives the L-pole moving contact to separate the L-pole static contact first through the linkage, and then the N-pole moving contact is separated from the N-pole static contact.

Further, the distance between the contact of the N-pole moving contact and the contact of the N-pole fixed contact and the distance between the contact of the L-pole moving contact and the contact of the L-pole fixed contact are both larger than the safety electric gap.

Furthermore, the linkage device and the linkage block are fixedly connected through a second connecting shaft.

Furthermore, the lower end of the linkage block is provided with a mounting cavity, the upper end of the N-pole moving contact stretches into the mounting cavity, one end of the elastic part is connected with the inner wall of the mounting cavity, and the other end of the elastic part is connected with the N-pole moving contact.

Furthermore, a fixing groove is formed in the mounting cavity and used for fixing the elastic piece.

Further, the elastic member is a spring.

Furthermore, the device also comprises an arc extinguish chamber which is only arranged beside the L-pole fixed contact.

Further, the electromagnetic release comprises an iron core assembly, a coil framework and a coil, wherein the iron core assembly is installed on the coil framework, the coil is wound outside the iron core assembly, and the L-pole static contact is connected with one end of the coil.

A breaker is provided with the breaker opening and closing contact mechanism.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model redesigns the N pole linkage module, especially the linkage block and the N pole moving contact structure, simplifies the whole structure of the opening and closing contact mechanism, and realizes the reduction of the volume; meanwhile, the structure still ensures the function of 'first on and then off' of the N pole compared with the L pole in the circuit breaker, and improves the safety of products.

2. The utility model discloses an increase the length of N utmost point static contact, can be under the minimum condition of change, the maximize has increased the electric clearance between moving contact and the static contact in the N utmost point, ensures the safe current-carrying capacity of circuit breaker. The linkage piece of structure is simplified in the cooperation, the utility model discloses can use fast to current product on, and need not change the L utmost point structure of current product, easily reform transform and production.

3. The utility model discloses a dislocation about the structure of the utmost point of N and L has basically avoided producing the possibility of electric arc at the utmost point of N, consequently only need set up corresponding explosion chamber in the utmost point linkage module of L, further saves the structure space, the arrangement of other components in the circuit breaker of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the local explosion of the present invention.

Fig. 3 is a schematic structural diagram of a linkage block and a linkage device.

Fig. 4 is a schematic structural diagram of the linkage block.

Fig. 5 is a schematic structural view of the electromagnetic release.

Fig. 6 is a schematic structural diagram of the opening state of the present invention.

Fig. 7 is a schematic structural diagram of the critical closing state of the present invention.

Reference numerals: 11. the electromagnetic tripping device comprises an electromagnetic tripping device body 11a, an iron core assembly 11b, a coil framework 11c, a coil 12, a linkage device 13, an L-pole moving contact 14, an L-pole static contact 21, a wiring board 22, a linkage block 22a, an installation cavity 22b, a fixed groove 23, an N-pole moving contact 24, an elastic part 25, an N-pole static contact 3, a first connecting shaft 4, a second connecting shaft 5 and an arc extinguish chamber.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in FIGS. 1-4, the embodiment provides a circuit breaker opening and closing contact mechanism, which comprises an L-pole linkage module and an N-pole linkage module.

The L pole linkage module comprises an electromagnetic release 11, a linkage 12 and an L pole moving contact 13. The electromagnetic release 11 is provided with an L-pole static contact 14. Specifically, the method comprises the following steps: as shown in fig. 5, the electromagnetic release 11 includes an iron core assembly 11a, a coil bobbin 11b, and a coil 11c, the iron core assembly 11a is mounted on the coil bobbin 11b, the coil 11c is wound outside the iron core assembly 11a, and the L-pole stationary contact 14 is connected to one end of the coil 11 c. The L-pole moving contact 13 is connected with the linkage 12 and is positioned on one side of the L-pole fixed contact 14, and the L-pole moving contact 13 contacts or separates the L-pole fixed contact 14 under the action of the linkage 12. The linkage 12 can perform switching-on and switching-off operations under the operation of a handle of the circuit breaker, and can also perform switching-off operations under the pushing of the iron core assembly 11a, namely, the L pole moving contact 13 and the L pole static contact 14 are controlled to be separated. The linkage 12 and the core assembly 11a are both of existing mature structures, and therefore, the detailed description thereof is omitted.

The N-pole linkage module includes a terminal plate 21, a linkage block 22, an N-pole movable contact 23, and an elastic member 24. The linkage block 22 is disposed to one side of the linkage 12. The first connecting shaft 3 jointly penetrates through the linkage block 22 and the linkage 12, and the linkage block 22 and the linkage 12 are fixedly connected through the second connecting shaft 4. Thereby, the link block 22 and the link 12 can be synchronously rotated about the first connecting shaft 3. The lower end of the linkage block 22 is provided with a mounting cavity 22a, and the upper end of the N-pole moving contact 23 extends into the mounting cavity 22a and is rotatably connected with the first connecting shaft 3 in the mounting cavity 22 a. The body of the N-pole moving contact 23 is not in direct contact with the mounting cavity 22 a. Thereby, the N-pole movable contact 23 can rotate around the first connecting shaft 3 in the mounting cavity 22 a. A fixing groove 22b is further provided in the mounting chamber 22a for disposing the elastic member 24. One end of the installed elastic element 24 is connected with the inner wall of the installation cavity 22a, and the other end is connected with the center of the N-pole moving contact 23. The elastic member 24 may be an elastic block or a spring made of a buffer material, and a spring is preferred in this embodiment. The wiring board 21 and the electromagnetic release 11 are arranged side by side, and an N-pole static contact 25 is arranged on the wiring board 21.

The specific positional relationship among the N-pole moving contact 23, the N-pole stationary contact 25, the L-pole moving contact 13, and the L-pole stationary contact 14 in this embodiment is as shown in fig. 6: the contact of the N-pole static contact 25 and the contact of the L-pole static contact 14 are arranged in a coplanar manner. The distance between the contact of the N-pole moving contact 23 and the contact of the N-pole fixed contact 25 is B4; the distance between the contact of the L-pole moving contact 13 and the contact of the L-pole fixed contact 14 is B2; the distance from the contact of the N-pole fixed contact 25 to the first connecting shaft 3 is equal to the distance from the contact of the N-pole movable contact 23 to the first connecting shaft 3, and B3 is obtained; the distance from the contact of the L-pole fixed contact 14 to the first connecting shaft 3 is equal to the distance from the contact of the L-pole movable contact 13 to the first connecting shaft 3, and B1 is obtained; the included angle formed by the N-pole movable and static contact and the first connecting shaft 3 is < D; the included angle formed by the L-pole movable and static contact and the first connecting shaft 3 is < C. As can be seen from the figure, the angle D is less than the angle C, and the B1 is less than the B3, so that the N pole movable and static contact can contact before the L pole movable and static contact. And B2 and B4 are both larger than the safety electric gap, so that the safety of the circuit breaker is ensured. In the embodiment, by increasing the length of the N-pole static contact 25, the electrical gap between the moving contact and the static contact in the N-pole can be increased to the maximum extent under the condition of minimum structural change, so that the safe current-carrying capacity of the circuit breaker is ensured. And simultaneously, the linkage piece 22 of structure is simplified in the cooperation, the utility model discloses can use fast to current product on, and need not change the L utmost point structure of current product, easily reform transform and production.

Referring to the structure shown in fig. 7 and fig. 1, the working principle of the present embodiment is:

when the switch is switched on, the linkage 12 drives the N-pole moving contact 23 to rotate anticlockwise through the linkage block 22 to contact the N-pole static contact 25 firstly, and after the N pole is contacted, the N-pole moving contact 23 in the linkage block 22 rotates around the first connecting shaft 3 and compresses the elastic part 24 to further rotate; meanwhile, the linkage 12 directly drives the L-pole moving contact 13 to counterclockwise contact the L-pole stationary contact 14. Therefore, the N pole is closed first and the L pole is closed when the switch is switched on.

When the brake is switched off, the electromagnetic release 11 pushes the linkage 12, and the linkage 12 drives the L-pole moving contact 13 to rotate clockwise, so that the L-pole moving contact 13 separates the L-pole static contact 14; at this time, the N-pole moving contact 23 is still attached to the N-pole fixed contact 25 under the pressure of the elastic element 24; when the L-pole moving contact 13 rotates clockwise for a certain distance, the N-pole moving contact 23 is separated from the N-pole stationary contact 25. Therefore, the L pole is separated firstly when the brake is switched off, and the N pole is separated.

According to the principle, when the electric arc breaker works, when the electric arc mainly appears in a live wire loop of a zero line and an L pole, the L pole is electrified later, most harmful electric arcs are concentrated on the L pole, when the electric arc breaker is opened, the L pole is firstly separated, most harmful electric arcs are concentrated on the L pole, and the on-off positions of the L pole and the N pole need height difference and cannot mutually interfere. Therefore, the present embodiment further includes an arc-extinguishing chamber 5, and the arc-extinguishing chamber 5 is disposed only behind the L-pole stationary contact 14, and performs arc-extinguishing using the L-pole. And an arc extinguish chamber 5 is not required to be arranged on the N pole, so that the structural space is further saved, and the arrangement of other components in the circuit breaker is facilitated.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A breaker opening and closing contact mechanism comprises an L-pole linkage module and an N-pole linkage module, wherein the L-pole linkage module comprises an electromagnetic release (11), a linkage (12) and an L-pole moving contact (13), an L-pole fixed contact (14) is arranged on the electromagnetic release (11), the L-pole moving contact (13) is connected with the linkage (12) and is positioned on one side of the L-pole fixed contact (14), and the L-pole moving contact (13) is contacted with or separated from the L-pole fixed contact (14) under the action of the linkage (12), and the breaker opening and closing contact mechanism is characterized in that the N-pole linkage module comprises a wiring board (21), a linkage block (22), an N-pole moving contact (23) and an elastic piece (24), the linkage block (22) is fixedly connected with the linkage (12), the linkage block (22) and the linkage (12) jointly rotate around a first connecting shaft (3), and the wiring board (21) and the electromagnetic release (11) are arranged side by side, an N-pole static contact (25) is arranged on the wiring board (21), the upper end of the N-pole moving contact (23) is rotatably connected with the first connecting shaft (3), and an elastic element (24) is arranged between the middle of the N-pole moving contact (23) and the linkage block (22); the contact of the N-pole static contact (25) and the contact of the L-pole static contact (14) are arranged in a coplanar manner, an included angle formed by the N-pole static contact (25) and the N-pole moving contact (23) is smaller than an included angle formed by the L-pole static contact (14) and the L-pole moving contact (13), and the distance from the contact of the N-pole static contact (25) to the first connecting shaft (3) is equal to the distance from the contact of the N-pole moving contact (23) to the first connecting shaft (3); the distance from the contact of the L-pole static contact (14) to the first connecting shaft (3) is equal to the distance from the contact of the L-pole moving contact (13) to the first connecting shaft (3); the distance from the contact of the N-pole static contact (25) to the first connecting shaft (3) is greater than the distance from the contact of the L-pole static contact (14) to the first connecting shaft (3);

when the switch is switched on, the linkage device (12) drives the N-pole moving contact (23) to contact the N-pole static contact (25) through the linkage block (22), then the N-pole moving contact (23) rotates around the first connecting shaft (3) and compresses the elastic part (24), and the L-pole moving contact (13) contacts the L-pole static contact (14); when the brake is switched off, the electromagnetic release (11) drives the L-pole moving contact (13) to be separated from the L-pole static contact (14) through the linkage (12), and then the N-pole moving contact (23) is separated from the N-pole static contact (25).

2. The circuit breaker opening and closing contact mechanism according to claim 1, wherein a distance between a contact of the N-pole moving contact (23) and a contact of the N-pole stationary contact (25) and a distance between a contact of the L-pole moving contact (13) and a contact of the L-pole stationary contact (14) are both greater than a safety electrical gap.

3. The circuit breaker opening and closing contact mechanism according to claim 1, wherein the linkage device (12) and the linkage block (22) are fixedly connected through a second connecting shaft (4).

4. The circuit breaker opening and closing contact mechanism according to claim 1, wherein a mounting cavity (22a) is formed at the lower end of the linkage block (22), the upper end of the N-pole moving contact (23) extends into the mounting cavity (22a), one end of the elastic member (24) is connected with the inner wall of the mounting cavity (22a), and the other end of the elastic member is connected with the N-pole moving contact (23).

5. The circuit breaker opening and closing contact mechanism according to claim 4, wherein a fixing groove (22b) is formed in the mounting cavity (22a) and used for fixing the elastic member (24).

6. The circuit breaker opening and closing contact mechanism according to claim 4 or 5, wherein the elastic member (24) is a spring.

7. The circuit breaker opening and closing contact mechanism according to claim 1, further comprising an arc-extinguishing chamber (5), wherein the arc-extinguishing chamber (5) is only arranged beside the L-pole static contact (14).

8. The circuit breaker opening and closing contact mechanism according to claim 1, wherein the electromagnetic release (11) comprises an iron core assembly (11a), a coil bobbin (11b) and a coil (11c), the iron core assembly (11a) is installed on the coil bobbin (11b), the coil (11c) is wound outside the iron core assembly (11a), and the L-pole stationary contact (14) is connected with one end of the coil (11 c).

9. A circuit breaker, characterized in that the circuit breaker opening and closing contact mechanism according to any one of claims 1 to 8 is installed in the circuit breaker.