WO2022135043A1

WO2022135043A1 - Moving contact operating mechanism of circuit breaker

Info

Publication number: WO2022135043A1
Application number: PCT/CN2021/133627
Authority: WO
Inventors: 周维峰; 林凯; 胡广召
Original assignee: 浙江奥来电器有限公司
Priority date: 2020-12-25
Filing date: 2021-11-26
Publication date: 2022-06-30
Also published as: CN112530757A

Abstract

A moving contact operating mechanism of a circuit breaker. A moving contact base (2) is integrally provided with a mounting column (21); a lock catch (1) and a moving contact (3) are both movably sleeved on the mounting column (21); an upper end of the moving contact base (2) is provided with a sliding groove (211) in which an end of a connecting rod (4) of a circuit breaker can slide; the sliding groove (211) comprises a bent portion (2111) and a straight portion (2112); an abutting arm (11) is arranged at the upper end of the lock catch (1); and a lock catch push rod mechanism (7) comprises a push rod (72) and a spring (71). After the circuit breaker is tripped, the front end of the push rod (72) comes into contact with the side surface of the lock catch (1), the second end of the connecting rod (4) is locked at the bent portion (2111) of the sliding groove (211), and a handle (6) can then be pushed to close the circuit breaker. According to this solution, the present invention solves the problem in the prior art, and provides the moving contact operating mechanism of a circuit breaker, which can reduce the number of parts based on the principles of mechanics and mechanology, and allows metal or plastic particles to fall into corresponding grooves or gaps to avoid affecting the action of the moving contact.

Description

A circuit breaker moving contact operating mechanism

technical field

The invention relates to a circuit breaker, in particular to a moving contact operating mechanism inside the circuit breaker.

Background technique

The traditional circuit breaker product mechanism is generally equipped with levers, locks and jumpers. The structure is complex and the cost is high. The volume of the jumper is unfavorable for automatic assembly, and the product has many parts, and the product has the risk of failure. Learn the principle to reduce the parts, remove the tripping and reduce the tripping force of the product. The traditional circuit breaker product fixing mechanism uses a metal shaft. Because the metal shaft conducts electricity, the 1P+N or L and N poles are provided with contacts. For the product, there is a problem that the electrical gap between the L and N poles is too small, or the voltage breakdown between the L and N poles after the breaking test. Therefore, the metal shaft is not used to position the product, and the combination of the lever and the housing is used to achieve positioning. During the mechanical movement between the traditional circuit breaker lever and the moving contact, the friction produces plastic or metal particles that affect the contact movement.

SUMMARY OF THE INVENTION

The present invention overcomes the problems existing in the prior art, and provides a new type of moving contact that can reduce parts through mechanical principles and mechanical principles, and metal or plastic particles can fall into corresponding grooves or gaps without affecting the action of the moving contact. Contact operating mechanism.

In order to achieve the above purpose, the present invention adopts the following technical scheme: a circuit breaker moving contact operating mechanism, including a handle, a lock, a lock push rod device, a moving contact seat and a moving contact, the handle and the moving contact seat A connecting rod is arranged between, the first end of the connecting rod is connected to the handle, the second end of the connecting rod is connected to the movable contact seat, the lock and the movable contact are both arranged on the movable contact seat, and the movable contact is connected to the movable contact seat. A torsion spring is used to realize the linkage setting between the movable contact bases, which is characterized in that: the movable contact base is integrally provided with a mounting post, and the lock catch and the moving contact are movably sleeved on the mounting post, and the moving contact The upper end of the seat is provided with a chute for the end of the circuit breaker connecting rod to slide, the chute includes a curved part and a straight part, the upper end of the lock is provided with a resistance arm, and the resistance arm is provided with a resistance surface, so The lock push rod device includes a push rod and a spring, the spring acts on the push rod, and the front end of the push rod abuts on the side of the lock after the circuit breaker is disconnected, so that the contact surface of the lock is close to the curved part of the chute so that the The second end of the connecting rod is locked in the curved part of the chute, and after the second end of the connecting rod is locked in the curved part of the chute, the handle can be pushed to close the circuit breaker; after the circuit breaker is closed, the release mechanism of the circuit breaker acts on the lock When the lock is rotated, the contact surface loses the locking of the second end of the connecting rod, and at this time, the second end of the connecting rod can slide into the straight part of the chute to realize opening of the circuit breaker.

By adopting the above scheme, a new method is adopted to realize the locking or unlocking of the end of the connecting rod of the circuit breaker, which is simple in structure, convenient and reliable in installation. In addition, the contact surface of the lock is matched with the chute, so long as the lock is controlled to rotate It can realize closing or opening, which is very practical.

A further arrangement of the present invention is that: the curved part of the chute is bent downward at one end close to the handle, the lower side of the curved part is provided with a limit surface and a pressing surface, and the limit surface is the second connecting rod after the circuit breaker is switched off. The end is at the lowest position of the curved part of the chute. After the circuit breaker is opened, the first end of the connecting rod connected to the handle is higher than the second end of the connecting rod at the curved part of the chute. During and after the circuit breaker is closed, the connecting rod is closed. At this time, the angle between the direction of the thrust generated by the handle on the second end of the connecting rod and the direction of the thrust generated by the pressing facing the second end of the connecting rod is less than 180 degrees. After the circuit breaker is closed, the top rod end of the locking push rod mechanism is arranged separately from the side surface of the locking buckle; the outer side of the contact surface is provided on the contact arm with an inclined surface for the second end of the connecting rod to slide into the curved part of the chute. A dial arm is arranged above the lock catch and below the contact arm, and a fork is formed between the contact arm and the dial arm. The width of the fork is greater than the diameter of the second end of the connecting rod. The second end of the connecting rod can be toggled during the gate to make the second end of the connecting rod slide into the straight part of the chute; the contact arm and the dial arm are dislocated, and a positioning protrusion is provided under the chute of the movable contact seat Part of the upper side of the positioning boss and the lower side of the curved part of the chute are integrally arranged to form a pressing surface. The second end of the connecting rod is placed on the curved part of the chute, and the dial arm is placed on the outer side of the positioning boss.

The above solution is one of the embodiments of the present invention, wherein the angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressing limit facing the second end of the connecting rod is less than 180 degrees , so as to ensure that the lock is rotated after being pushed by the top rod of the circuit breaker release, the connecting rod can smoothly slide the straight part of the chute, to ensure that the circuit breaker can be opened, and the setting of the slope at the front end of the contact surface of the lock can be very good. Guide the end of the connecting rod into the curved part of the chute without jamming. The setting of the toggle arm can slide the end of the connecting rod into the straight part of the chute when the circuit breaker is disconnected. Here we want to explain the circuit breaker Opening refers to the automatic opening of the circuit breaker, not the manual operation of the handle, which can ensure that the circuit breaker can be successfully opened and increase the safety of the product; finally, the upper side of the positioning boss and the lower side of the curved part of the chute are formed. The integrated setting constitutes a pressing surface, so that the pressing surface is relatively large, the end of the locking connecting rod will be more stable, and the stability of the product will be increased. Movement of the rod end.

A further arrangement of the present invention is: the curved part of the chute is bent upward at one end close to the handle, the upper side of the curved part is provided with a pressing limit surface, and the second end of the connecting rod abuts against the pressing force after the circuit breaker is closed On the limit surface, the angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressing limit facing the second end of the connecting rod is less than 180 degrees; the contact surface on the contact arm is L-shaped, the lower part of the contact surface is provided with an inclined surface for the second end of the connecting rod to slide into the curved part, and a groove is provided on the contact periphery of the sliding groove.

With the above solution, the purpose of the above setting is that the handle can be rotated in the opposite direction, so that the directions of the N pole and the L pole can be reversed compared with the first embodiment of this application document to meet different needs.

The present invention will be further described below in conjunction with specific embodiments.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the present invention;

2 is a perspective view reflecting a moving contact and a moving contact seat according to Embodiment 1 of the present invention;

FIG. 3 is a perspective view of the movable contact seat according to the first embodiment of the present invention;

4 is a structural diagram of a lock according to an embodiment of the present invention;

FIG. 5 is a structural diagram of the cooperation between a lock and a moving contact according to an embodiment of the present invention;

6 is a schematic diagram of the thrust F1, F2 and the included angle A in the first embodiment of the present invention;

FIG. 7 is a structural diagram of the cooperation of the lock at the disconnected position of the product and the movable contact seat according to an embodiment of the present invention;

Fig. 8 is a structural diagram of the first embodiment of the present invention in which the lock and the movable contact seat are matched at the beginning of closing;

FIG. 9 is a structural diagram of the lock and the movable contact seat in the closing process of the product according to the first embodiment of the present invention;

FIG. 10 is a structural diagram of the lock and the movable contact seat after the product is closed according to an embodiment of the present invention;

Fig. 11 is a structural diagram of the lock and the movable contact seat when the product is about to trip according to the first embodiment of the present invention;

FIG. 12 is a structural diagram of the cooperation between the lock and the movable contact seat when the product is forcibly tripped according to the embodiment of the present invention;

13 is a structural diagram of the lock and the movable contact seat in the process of returning the handle after the product is tripped according to Embodiment 1 of the present invention;

FIG. 14 is a structural diagram of the lock and the movable contact seat when the movable contact of the mechanism is knocked apart by the electromagnetic mechanism when the product is short-circuited according to an embodiment of the present invention;

Fig. 15 is a structural diagram of the lock catch and the movable contact seat when the movable contact of the mechanism is knocked apart by the electromagnetic mechanism when the product is short-circuited according to the embodiment of the present invention;

FIG. 16 is an exploded view of the lock and push rod mechanism according to the first embodiment of the present invention;

17 is a structural diagram of Embodiment 2 of the present invention;

18 is a structural diagram of a reflection chute in Embodiment 2 of the present invention;

19 is a schematic diagram of the thrust F1, F2 and the included angle A in the second embodiment of the present invention

FIG. 20 is a structural diagram of the movable contact seat according to the second embodiment of the present invention.

Detailed ways

As shown in Figures 1-16, the first embodiment of the present invention is a circuit breaker moving contact operating mechanism, including a handle 6, a lock 1, a lock push rod mechanism 7, a moving contact seat 2 and a moving contact 3. A connecting rod 4 is arranged between the handle 6 and the moving contact base 2, the first end of the connecting rod 4 is connected to the handle 6, the second end of the connecting rod 4 is connected to the moving contact base 2, the latch 1 and the The movable contacts 3 are all arranged on the movable contact base 2, and the movable contact 3 and the movable contact base 2 are interlocked by the torsion spring 5. In the embodiment of the present invention, the movable contact base 2 is integrated with it. A mounting post 21 is provided on the base, on which the lock catch 1 and the moving contact 3 are movably sleeved, and the upper end of the moving contact seat 2 is provided with a chute 211 for the end of the connecting rod 4 to slide. , the chute 211 includes a curved portion 2111 and a straight portion 2112, the upper end of the lock 1 is provided with a resistance arm 11, the interference arm 11 is provided with a resistance surface 111, the lock push rod mechanism 7 includes a spring 71 and a top The rod 72 and the spring 71 act on the push rod 72. After the circuit breaker is disconnected, the front end of the push rod 72 is in contact with the side of the lock 1, so that the contact surface 111 of the lock 1 is close to the curved part 2111 of the chute 211 so as to connect the connecting rod. The second end of 4 is locked in the curved part 2111 of the chute, and the second end of the connecting rod 4 is locked in the curved part 2111 of the chute to push the handle 6 to close the circuit breaker; When the latch 1 moves and the latch 1 rotates, the contact surface 111 loses the locking of the second end of the connecting rod 4 , and the second end of the connecting rod 4 can slide into the straight portion 2112 of the chute to open the circuit breaker. By adopting the above solution, a new method is adopted to realize the locking or unlocking of the end of the connecting rod of the circuit breaker, which is simple, convenient and reliable in structure. The buckle 1 can be rotated, which is very practical. In the above solution, the pushing force of the ejector rod 73 on the lock buckle 1 can be reduced after the lock buckle 1 is rotated, so that the requirements for the release device are greatly reduced when the buckle 1 is tripped.

In the first embodiment of the present invention, the curved portion 2111 of the chute 211 is bent downward at one end close to the handle 6 , and a limiting surface 21111 and a pressing surface 21112 are provided on the lower side of the curved portion, and the limiting surface 21111 is a circuit breaker After opening, the second end of the connecting rod 4 is at the lowest position of the curved part 2111 of the chute 211. After the circuit breaker is opened, the first end of the connecting rod 4 connected with the handle 6 is higher than the second end of the connecting rod 4 on the curved part 2111 of the chute. At both ends, the second end of the connecting rod 4 is in contact with the pressing surface 21112 during and after the closing process of the circuit breaker. At this time, the direction of the thrust F1 generated by the handle 6 on the second end of the connecting rod 4 is opposite to the pressing surface 21112. The angle A between the directions of the thrust force F2 generated by the second end of the connecting rod 4 is less than 180 degrees, and the resultant force F3 generated by them is upward. 1. The side is separated or contacted, and the contact thrust here is very small; by adopting the above scheme, the stability of the circuit breaker can be well ensured. The setting of the limit surface 21111 and the pressing surface 21112 ensures that the handle 6 can be Control the connecting rod 4, wherein the limit surface 21111 is the position of the second end of the connecting rod 4. If its position cannot be guaranteed, it cannot be operated. 4. The guarantee of the thrust generated by the second end, and the direction of the thrust must be handled well, so as to ensure the normal closing of the circuit breaker and the guarantee that the latch 1 can be quickly tripped after closing. In this application document, the pressing surface 21112 is also It can be connected with the limit surface 21111, and the setting of the above position also ensures that the circuit breaker can work normally.

In the first embodiment of the present invention, the interference arm 11 is provided with an inclined surface 112 on the outer side of the interference surface 111 for the second end of the connecting rod 4 to slide into the curved portion 2111 of the chute 211, and the lock catch 1 is located above the interference arm. A dial arm 12 is arranged below the 11, and a fork is formed between the contact arm 11 and the dial arm 12. The width of the fork is greater than the diameter of the second end of the connecting rod 4. The upper side of the dial arm 12 is opened at the circuit breaker. At this time, the second end of the connecting rod 4 can be toggled to cause the second end of the connecting rod 4 to slide into the straight portion 2112 of the chute. By adopting the above solution, the inclined surface 112 is to ensure that the second end of the connecting rod 4 can be smoothly reset to the curved portion 2111 after the tripping. For subsequent operations, the inclined surface 112 may not actually be provided, but only the end of the interference surface 111. The arc-shaped transition surface is sufficient, as long as the second end of the connecting rod 4 enters the curved part 2111, the width of the fork is to ensure smooth opening, and the function of the dial arm 12 is to prevent the connecting rod 4 from being broken during the opening. Adhesion, then the toggle arm 12 can play the role of toggle the second end of the connecting rod 4 to ensure that the gate can be opened smoothly and no dangerous things will occur.

In the first embodiment of the present invention, the interference arm 11 and the dial arm 12 are dislocated, and a positioning boss 22 is provided below the chute 21 of the movable contact base 2 , and a part of the upper side of the positioning boss 22 is connected to the chute. 21. The lower side of the curved part is integrally arranged to form a pressing surface 21112. The pressing surface 21112 cooperates with the abutting surface 111 to lock the second end of the connecting rod 4 of the circuit breaker so that the second end of the connecting rod 4 of the circuit breaker can be locked. At the curved portion 2111 of the chute, the dial arm 12 is placed on the outer side of the positioning boss 22 . The bottom periphery of the chute 211 is provided with a groove 2113. By adopting the above solution, the structure is compact. In addition, part of the upper side of the positioning boss 22 and the lower side of the curved portion 2111 are integrated to form a pressing surface 21112, which greatly increases the resistance. The area of the pressing surface 21112 makes the pressing force better and the product performance more stable.

As shown in FIGS. 17-20 , in the second embodiment of the present invention, the curved portion 2111 ′ of the chute 211 ′ is bent upward at one end close to the handle 6 , and the upper side of the curved portion 2111 ′ is provided with a pressing limit surface 21112 ′ , after the circuit breaker is closed, the second end of the connecting rod 4 abuts on the pressing limit surface 21112', and the thrust direction F1 generated by the handle 6 on the second end of the connecting rod 4 is connected to the pressing limit surface 21112'. The angle A between the thrust directions F2 generated by the second end of the rod 4 is less than 180 degrees, so that the resultant force F3 they generate is downward. The contact surface 111 ′ on the locking contact arm 11 ′ is L-shaped, and the lower part of the contact surface 111 ′ is provided with the inclined surface 112 ′ for the second end of the connecting rod 4 to slide into the curved portion 2111 ′. A groove 2113' is provided. The purpose of the above setting is that the handle can be rotated in the opposite direction, so that the directions of the N pole and the L pole can be reversed compared with the first embodiment of this application document to meet different requirements.

Claims

A circuit breaker moving contact operating mechanism, comprising a handle, a lock, a lock push rod device, a moving contact seat and a moving contact, a connecting rod is arranged between the handle and the moving contact seat, and a first end of the connecting rod It is connected to the handle, the second end of the connecting rod is connected to the movable contact seat, the lock and the movable contact are both arranged on the movable contact seat, and the movable contact and the movable contact seat are linked by a torsion spring. , which is characterized in that: the movable contact seat is integrally provided with an installation column, the lock and the movable contact are movably sleeved on the installation column, and the upper end of the movable contact seat is provided with a connecting rod for the circuit breaker The sliding groove of the sliding groove includes a curved part and a straight part, the upper end of the lock is provided with a resistance arm, and the interference arm is provided with a resistance surface, and the lock push rod device includes a push rod and a spring , the spring force acts on the push rod, and the front end of the push rod is in contact with the side of the lock after the circuit breaker is disconnected, so that the contact surface of the lock is close to the curved part of the chute so as to lock the second end of the connecting rod on the curved part of the chute After the second end of the connecting rod is locked on the curved part of the chute, the handle can be pushed to close the circuit breaker; after the circuit breaker is closed, the release mechanism of the circuit breaker acts on the lock and makes the lock rotate, and the contact surface loses the first position of the connecting rod. The two ends are locked, and the second end of the connecting rod can slide into the straight part of the chute to realize opening of the circuit breaker.
The circuit breaker moving contact operating mechanism according to claim 1, wherein the curved portion of the chute is bent downward at one end close to the handle, and the lower side of the curved portion is provided with a limiting surface and a pressing surface to limit the The level is the lowest position of the second end of the connecting rod at the curved part of the chute after the circuit breaker is switched off. , the second end of the connecting rod is in contact with the pressing surface during and after the closing of the circuit breaker. At this time, the direction of the thrust generated by the handle on the second end of the connecting rod and the thrust generated by the pressing face on the second end of the connecting rod The included angle between the directions is less than 180 degrees, and the top rod end of the latch push rod mechanism is arranged separately from the side surface of the latch after the circuit breaker is closed.
The linkage device between the lock and the movable contact according to claim 1 or 2, wherein the interference arm is provided with an inclined surface on the outer side of the interference surface for the second end of the connecting rod to slide into the curved part of the chute, so A dial arm is arranged above the lock catch and below the interference arm, and a fork is formed between the interference arm and the dial arm. The width of the fork is greater than the diameter of the second end of the connecting rod. When the brake is opened, the second end of the connecting rod can be toggled to make the second end of the connecting rod slide into the straight part of the chute.
The linkage device between the lock of the circuit breaker and the moving contact according to claim 2, wherein the contact arm and the dial arm are arranged in a dislocation, and a positioning boss is arranged under the chute of the moving contact seat, Part of the upper side of the positioning boss and the lower side of the curved portion of the chute are integrally arranged to form a pressing surface, which cooperates with the abutting surface to lock the second end of the connecting rod of the circuit breaker so that the connecting rod of the circuit breaker can be locked. The second end is placed on the curved part of the chute, and the dial arm is placed on the outer side of the positioning boss.
The circuit breaker moving contact operating mechanism according to claim 1, wherein the curved portion of the chute is upwardly curved at one end close to the handle, and the upper side of the curved portion is provided with a pressing limit surface, and the circuit breaker is closed. After the gate, the second end of the connecting rod is in contact with the pressing limit surface. At this time, the direction of the thrust generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressing limit facing the second end of the connecting rod are clamped. The angle is less than 180 degrees.
The circuit breaker moving contact operating mechanism according to claim 5, characterized in that: the contact surface on the contact arm is L-shaped, and the bottom of the contact surface is provided with an inclined surface that facilitates the second end of the connecting rod to slide into the curved portion, the sliding surface A groove is provided on the interference periphery of the groove.