WO2022135047A1

WO2022135047A1 - Linkage device for lock catch and moving contact of circuit breaker

Info

Publication number: WO2022135047A1
Application number: PCT/CN2021/133632
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: CN112582232A

Abstract

A linkage device for a lock catch (1) and a moving contact (3) of a circuit breaker. A sliding groove (211) allowing for sliding of an end portion of a circuit breaker connecting rod (4) is arranged at the upper end of a moving contact seat (2); the sliding groove comprises a bent portion (2111) and a straight portion (2112); an abutting arm (11) is arranged at the upper end of the lock catch; the abutting arm is provided with an abutting surface (111). After the circuit breaker is closed, an offline mechanism of the circuit breaker can act on the lock catch to rotate the lock catch, so that the abutting surface releases the locking on a second end of the connecting rod; in this case, the second end of the connecting rod slides into the straight portion of the sliding groove, and the moving contact seat rotates to drive the moving contact to rotate so as to realize disconnection of the circuit breaker.

Description

A linkage device of the lock of a circuit breaker and the moving contact

technical field

The invention relates to a circuit breaker, in particular to a linkage device of a lock and a moving contact inside the circuit breaker.

Background technique

The traditional circuit breaker product 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. Mechanical principle to reduce parts, remove 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 to 1P+N or L and N poles are provided with For contact products, there is a problem that the electrical clearance 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 lever and the moving contact of the traditional circuit breaker, the friction produces plastic or metal particles that affect the movement of the contact. Therefore, a movable contact surface of the moving contact corresponding to the moving contact is set so that the moving contact is in contact with the conflicting surface. In case of conflict, metal or plastic particles can fall into the corresponding grooves, so as not to affect the action of the moving contact, while the plastic particles generated by friction during the movement of the traditional lock and the lever can increase the release force and affect the action characteristics of the product.

SUMMARY OF THE INVENTION

The present invention overcomes the problems existing in the prior art, provides a mechanical principle and a mechanical principle to reduce the tripping and reduce the tripping force of the product, the metal or plastic particles can fall into the corresponding grooves or voids, and the A new type of circuit breaker's lock and the linkage device of the moving contact that affects the action of the moving contact.

In order to achieve the above purpose, the present invention adopts the following technical scheme: a linkage device of a lock of a circuit breaker and a movable contact, including a handle, a lock, a lock push rod mechanism, a movable contact seat and a movable contact, a handle. A connecting rod is arranged between it and the moving contact base, the first end of the connecting rod is connected to the handle, the second end of the connecting rod is connected to the moving contact base, and both the lock and the moving contact are arranged on the moving contact base , between the moving contact and the moving contact seat through a torsion spring to achieve linkage setting, which is characterized in that: the moving contact seat is integrally provided with a mounting post, and the lock and the moving contact are movably sleeved on the mounting post The upper end of the movable contact seat is provided with a chute for the end of the circuit breaker connecting rod to slide, and the chute includes a curved part and a straight part; There is a contact surface, and the lock push rod mechanism includes a bracket, a spring and a top rod. The bracket is arranged on the side of the lock in the circuit breaker housing, and the bracket is provided with an accommodating cavity. In the cavity, the end of the ejector rod protrudes from the bracket accommodating cavity under the action of the spring. After the circuit breaker is disconnected, the end of the ejector rod touches the side of the lock, so that the lock touches the contact surface of the arm and the chute. The second end of the connecting rod of the circuit breaker can be locked by the cooperation of the bending part of the circuit breaker. At this time, the handle can be pushed, and the handle drives the moving contact base to rotate through the connecting rod, and the moving contact base drives the moving contact to rotate to realize the closing of the circuit breaker; After the circuit breaker is closed, the off-line mechanism of the circuit breaker can act on the lock and make the lock rotate, and the contact surface loses the lock on the second end of the connecting rod. At this time, the second end of the connecting rod slides into the straight part of the chute, and the moving contact seat The rotation drives the moving contact to rotate to realize the disconnection 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, convenient and reliable in structure. In addition, the contact surface of the lock is matched with the chute, so long as the lock is controlled to rotate, Yes, it is very practical. In the above solution, the thrust of the ejector rod on the lock can also be reduced after the lock is rotated, so that the requirements for the release device are greatly reduced during tripping.

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 latch push rod mechanism is arranged separately from the side surface of the latch.

By adopting the above solution, the stability of the circuit breaker can be well ensured. The setting of the limit surface and the pressing surface ensures that the connecting rod can be controlled when the handle is operated, and the limit surface is the limit surface that limits the second end of the connecting rod. Position, if its position cannot be guaranteed, it cannot be operated. The pressing surface is the guarantee to generate thrust on the second end of the connecting rod during the closing process of the circuit breaker and after closing, and the direction of the thrust should also be dealt with, so as to ensure the circuit breaker. The circuit breaker is normally closed and the lock can be released quickly after closing. In this application document, the pressing surface can also be connected with the limit surface. The setting of the above position also ensures that the circuit breaker can work normally.

A further arrangement of the present invention is as follows: 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, and a dial arm is arranged above the lock and below the interference arm, and the interference A fork is formed between the arm and the toggle arm, and the width of the fork is greater than the diameter of the second end of the connecting rod. The second end slides into the straight portion of the chute.

By adopting the above solution, the inclined plane is to ensure that the second end of the connecting rod can be smoothly reset to the curved part after the tripping. For subsequent operations, in fact, the inclined plane may not be provided, but only the arc-shaped transition surface is provided at the end of the conflicting surface. Yes, as long as the second end of the connecting rod is not allowed to enter the bending part, the width of the fork is to ensure smooth opening, and the function of the toggle arm is that in case the connecting rod is stuck during the opening, the toggle arm can be activated. The function of the second end of the toggle connecting rod ensures that the brake can be opened smoothly and no dangerous things will happen.

A further arrangement of the present invention is that the interference arm and the dial arm are dislocated, a positioning boss is arranged below the chute of the movable contact base, and part of the upper side of the positioning boss is integrated with the lower side of the curved portion of the chute. The second end of the connecting rod of the circuit breaker can be locked so that the second end of the connecting rod of the circuit breaker is placed on the curved part of the chute, and the dial arm is placed on the curved part of the chute. Locate the outside face of the boss.

By adopting the above scheme, the structure is compact, and the upper side of the positioning boss is integrated with the lower side of the curved portion to form a pressing surface, which greatly increases the area of the pressing surface, makes the pressing force better, and the product performance is more stable.

A further arrangement of the present invention is: grooves are arranged on both sides of the bottom of the chute, an arc-shaped convex column is arranged around the bottom of the mounting column, and a gap is formed between the arc-shaped convex column and the arc-shaped convex column, The lock is provided with a circular through hole, the lock is sleeved on the arc-shaped convex column through the circular through hole, the movable contact seat is provided with a convex rib on the periphery of the installation column, and the inner side of the lock is provided with a convex rib. In contact with the rib, the side of the accommodating cavity on the bracket is provided with an opening for inserting the ejector rod, the first end of the ejector rod is provided with a cylinder for the spring to be sleeved, and one end of the spring is in contact with the accommodating cavity. On the inner side of the ejector rod, the other end is sleeved on the cylinder, a limiting edge is arranged below the first end of the ejector rod, a step is arranged on the inner side of the ejector rod, and the inner wall of the accommodating cavity is provided with a step to cooperate with the step. A boss for limiting the movement stroke of the ejector rod, and the second end of the ejector rod is set as an arc surface.

By adopting the above scheme, the groove can be set up to accumulate dust, and it will not affect the movement of the second end of the connecting rod. The lock and the moving contact seat are set by the above scheme, which is also to reduce friction, and there will be no impurities sticking to the chain buckle and The movable contact seat, bracket, ejector rod and spring are arranged in the above-mentioned way, which can work well for the lock. In addition, after the circuit breaker is closed, the ejector will not press against the lock, so the lock basically does not exist. The action of external force, so the force to push the lock is only small.

The final arrangement of the present invention is: the movable contact is sleeved on the mounting post and its side surface is in contact with or close to: the end of the arc-shaped convex post, and a limit block is arranged below the positioning boss, and the limit block is connected to the movable contact. A positioning port is formed between the head seats, a positioning block is arranged on the movable contact seat under the positioning boss, a bayonet is arranged on the movable contact, a concave cavity is arranged on the movable contact seat and located at the corresponding position of the bayonet, and the torsion spring It is also sleeved on the installation column, the first torsion arm of the torsion spring is in contact with the positioning opening, the second torsion arm of the torsion spring is in contact with the bayonet of the movable contact, and the end of the second torsion arm is bent and inserted into the cavity Among them, a positioning piece is arranged on the movable contact and located between the positioning boss and the positioning block, and the positioning piece restricts the rotation angle of the moving contact through the interference with the positioning boss or the positioning block.

By adopting the above scheme, the movable contact is installed reasonably, especially when the mechanism is under the condition of high current, the mechanism can push the movable contact to disconnect first, which increases the safety of the product.

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

Description of drawings

1 is a schematic structural diagram of an embodiment of the present invention;

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

3 is a perspective view of a moving contact seat according to an 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 the lock catch and the moving contact seat according to the embodiment of the present invention;

Fig. 6 is the schematic diagram of thrust F1, F2 and included angle A of the embodiment of the present invention;

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

FIG. 8 is a structural diagram of the lock and the movable contact seat at the beginning of the closing of the product according to the embodiment of the present invention;

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

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

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 the embodiment 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 of the embodiment of the present invention is short-circuited;

Fig. 15 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 the embodiment of the present invention;

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

Detailed ways

As shown in Fig. 1-Fig. 16, a linkage device of a lock and a movable contact of a circuit breaker includes a handle 6, a lock 1, a lock push rod mechanism 7, a movable contact base 2 and a movable 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 lock 1 and the moving contact The 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 integral with it. An installation post 21 is provided on which the lock catch 1 and the movable contact 3 are movably sleeved. The upper end of the movable contact base 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 , and the interference arm 11 is provided with a resistance surface 111 , and the lock push rod mechanism 7 includes a bracket 71 and a spring 72 And the ejector rod 73, the bracket 71 is arranged on the side of the lock 1 in the circuit breaker housing, the bracket 71 is provided with a accommodating cavity 711, the spring 72 and the ejector rod 73 are arranged in the accommodating cavity 711, the ejector rod 73 is in the spring Under the action of 72, its end protrudes from the accommodating cavity 711 of the bracket 71. After the circuit breaker is disconnected, the end of the ejector rod 73 abuts against the side of the latch 1, so that the latch 1 abuts against the contact surface 111 of the arm 11 and the slide. The curved portion 2111 of the groove 211 can be used to lock the second end of the connecting rod 4 . At this time, the handle 6 can be pushed. The handle 6 drives the moving contact base 2 to rotate through the connecting rod 4 , and the moving contact base 2 drives the moving contact 3 . Rotation realizes the closing of the circuit breaker; after the circuit breaker is closed, the off-line mechanism of the circuit breaker can act on the latch 1, so that the latch 1 rotates, the contact surface 111 loses the locking of the second end of the connecting rod 4, and the connecting rod 4 is the second The end slides into the straight part of the chute 2112, and the movable contact base 2 rotates to drive the movable contact 3 to rotate to realize the disconnection of the circuit breaker. By adopting the above scheme, a new way 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 thrust of the ejector rod 73 on the lock buckle 1 can be reduced after the lock buckle 1 is rotated, that is, the release only needs a small force to push the lock buckle. The requirements for the trip unit are greatly reduced.

In the 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 the circuit breaker After the switch, the second end of the connecting rod 4 is at the lowest position of the curved portion 2111 of the chute 211. After the circuit breaker is opened, the first end of the connecting rod 4 connected to the handle 6 is higher than the second end of the connecting rod 4 on the curved portion 2111 of the chute. 1, the second end of the connecting rod 4 is in contact with the pressing surface 21112 during the closing process of the circuit breaker and after the closing, and the thrust generated by the handle 6 on the second end of the connecting rod 4 at this time The angle A between the direction F1 and the direction of the thrust F2 generated by the pressing surface 21112 on the second end of the connecting rod 4 is less than 180 degrees. The side of the buckle 1 is separated and set; by adopting the above scheme, the stability of the circuit breaker can be well ensured, and the setting of the limit surface 21111 and the pressing surface 21112 ensures that the handle 6 can control the connecting rod 4 when operating, wherein The limiting surface 21111 is to limit the position of the second end of the connecting rod 4. If its position cannot be guaranteed, it cannot be operated. The pressing surface 21112 is the guarantee that the second end of the connecting rod 4 generates thrust during the closing process and after the circuit breaker is closed. , and deal with the direction of the thrust, so as to ensure the normal closing of the circuit breaker and the guarantee that the latch 1 can be quickly released after closing. At the same time, the setting of the above position also ensures that the circuit breaker can work normally.

In the 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 . The lock buckle 1 is located above the interference arm 11 A dial arm 12 is arranged at the bottom of the switch arm 12, 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 when the circuit breaker is opened. 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 it is ensured that 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 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 part of the upper side of the positioning boss 22 is connected to the chute 211 The lower side of the curved portion is integrally arranged to form a pressing surface 21112, which cooperates with the pressing 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 is placed on the circuit breaker. On the curved portion 2111 of the chute 211 , the dial arm 12 is placed on the outer side of the positioning boss 22 . 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 area of the pressing surface 21112 and makes the pressing force better. Product performance is more stable.

In the embodiment of the present invention, grooves 2113 are provided on both sides of the bottom of the chute 211, and the bottom of the mounting post 21 is provided with an arc-shaped convex post 212 around the bottom of the mounting post 21. The arc-shaped convex post 212 and the arc-shaped convex post A gap is formed between 212, the lock buckle 1 is provided with a circular through hole 14, the lock buckle 1 is sleeved on the arc-shaped convex column 212 through the circular through hole 14, and the movable contact seat 2 is located on the installation A rib 213 is provided on the periphery of the column 212, and the inner side of the lock 1 is in contact with the rib 213. The side of the accommodating cavity 711 on the bracket 71 is provided with an opening for inserting the ejector rod 73. The first end is provided with a cylinder 731 for the spring 72 to be sleeved. One end of the spring 72 is in contact with the inner surface of the accommodating cavity 711, the other end is sleeved on the cylinder 731, and a limiting edge 732 is arranged below the first end of the ejector rod 73. , its function is to facilitate the installation of the spring 72, a step 733 is provided on the inner side of the ejector rod 73, and a boss 712 is arranged on the inner wall of the accommodating cavity 711 to cooperate with the step 733 to limit the movement stroke of the ejector rod 73. The second end of the rod 73 is provided as an arc surface 734 . By adopting the above scheme, the setting of the groove 2113 can accumulate dust, and will not affect the movement of the second end of the connecting rod. The lock 1 and the movable contact seat 2 are set by the above scheme, which is also to reduce friction, and there will be no foreign matter sticking. The interlocking buckle 1, the movable contact base 2, the bracket 71, the ejector rod 73 and the spring 72 are arranged in the above-mentioned manner, so that the lock buckle 1 can work well. In addition, after the circuit breaker is closed, the ejector rod 73 will not affect the lock buckle. 1 is pressed, so that the lock 1 basically does not have the effect of external force, so the force to push the lock 1 is only small.

In the embodiment of the present invention, the movable contact 3 is sleeved on the mounting column 21 and its side surface is in contact with or close to the end of the arc-shaped convex column 212 , and a limiting block 221 is arranged under the positioning boss 22 to limit the position A positioning port is formed between the block 221 and the movable contact base 2 , the movable contact base 2 is provided with a positioning block 23 under the positioning boss 22 , the movable contact 3 is provided with a bayonet 31 , and the movable contact base 2 is A cavity is provided at the corresponding position of the bayonet 31, the torsion spring 5 is also sleeved on the mounting post 21, the first torsion arm of the torsion spring 5 is in contact with the positioning opening, and the second torsion arm of the torsion spring 5 is in contact with the moving contact 3. On the bayonet 31, and the end of the second torsion arm is bent and inserted into the cavity, the movable contact 3 is provided with a positioning piece 32 between the positioning boss 22 and the positioning block 23. The interference of the boss 22 or the positioning block 23 limits the rotation angle of the movable contact 3 . By adopting the above solution, the moving contact 3 is installed reasonably, especially when the mechanism is under high current conditions, the mechanism can push the moving contact 3 to disconnect first, so that the opening speed is accelerated, the breaking capacity of the product is improved, and the safety of the product is increased.

Claims

A linkage device of a lock and a moving contact of a circuit breaker, characterized in that it comprises a handle, a lock, a lock push rod mechanism, a moving contact seat and a moving contact, and the handle and the moving contact seat are arranged between the handle and the moving contact. There is a connecting rod, the first end of the connecting rod is connected to the handle, the second end of the connecting rod is connected to the moving contact seat, the lock and the moving contact are both arranged on the moving contact seat, and the moving contact and the moving contact A torsion spring is used between the seats to realize linkage setting, a mounting post is integrally provided on the movable contact seat, the lock catch and the movable contact are movably sleeved on the mounting post, and the upper end of the movable contact seat is provided with a movable contactor. A chute for the end of the 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, the interference arm is provided with a resistance surface, and the lock push rod mechanism includes a bracket , spring and ejector rod, the bracket is arranged on the side of the lock in the circuit breaker shell, the bracket is provided with a accommodating cavity, the spring and ejector rod are arranged in the accommodating cavity, and the end of the ejector rod is removed from the accommodating cavity under the action of the spring The bracket accommodating cavity protrudes out. After the circuit breaker is disconnected, the end of the ejector rod is in contact with the side of the lock, so that the contact surface of the abutting arm of the lock and the curved part of the chute can be connected to the second end of the connection rod of the circuit breaker. At this time, the handle can be pushed, and the handle drives the moving contact base to rotate through the connecting rod, and the moving contact base drives the moving contact to rotate to realize the closing of the circuit breaker; after the circuit breaker is closed, the off-line mechanism of the circuit breaker can lock the When the action causes the lock to rotate, the contact surface loses the locking of the second end of the connecting rod. At this time, the second end of the connecting rod slides into the straight part of the chute.
The linkage device of the lock and the movable contact according to claim 1, wherein the curved part of the chute is bent downward at one end close to the handle, and the lower side of the curved part is provided with a limiting surface and a pressing surface , the limit surface 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, and the first end of the connecting rod connected with the handle after the circuit breaker is switched off is higher than the first end of the connecting rod at the curved part of the chute. At both ends, the second end of the connecting rod is in contact with the pressing surface during and after the closing process 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 pressing force on the second end of the connecting rod are generated. The included angle between the thrust directions of the circuit breakers is less than 180 degrees, and the top rod end of the lock push rod mechanism is separated from the side of the lock after the circuit breaker is closed.
The linkage device between the lock and the movable contact according to claim 1 or 2, characterized in that: an inclined surface for the second end of the connecting rod to slide into the curved part of the chute is provided on the outer side of the abutting surface on the interference arm, 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 linkage device of the lock and the movable contact of the circuit breaker according to claim 1 or 2, characterized in that: grooves are provided on both sides of the bottom of the chute, and the bottom of the mounting post is provided with grooves around it. The arc-shaped convex column has a gap formed between the arc-shaped convex column and the arc-shaped convex column. The lock is provided with a circular through hole, and the lock is sleeved on the arc-shaped convex column through the circular through hole. A convex rib is arranged on the contact seat and on the periphery of the installation column, the inner side of the lock is in contact with the convex rib, and one side of the accommodating cavity on the bracket is provided with an opening for inserting the ejector rod. One end is provided with a cylinder for the spring to be sleeved, one end of the spring is in contact with the inner side of the accommodating cavity, the other end is sleeved on the cylinder, a limiting edge is arranged under the first end of the ejector rod, and the inner side of the ejector rod is A step is arranged on the top, the inner wall of the accommodating cavity is provided with a boss that cooperates with the step to limit the movement stroke of the ejector rod, and the second end of the ejector rod is set as an arc surface.
The linkage device of the lock of the circuit breaker and the movable contact according to claim 5, wherein the movable contact is sleeved on the mounting column and its side surface is in contact with or close to the end of the arc-shaped convex column, A limit block is arranged below the positioning boss, and a positioning port is formed between the limit block and the movable contact seat. The movable contact seat is provided with a positioning block under the positioning boss, and the movable contact is provided with a bayonet. The head seat is provided with a concave cavity at the corresponding position of the bayonet, and the torsion spring is also sleeved on the mounting post. On the mouth, and the end of the second torsion arm is bent and inserted into the concave cavity, the movable contact is provided with a positioning piece between the positioning boss and the positioning block, and the positioning piece is limited by the interference with the positioning boss or the positioning block. Rotation angle of the moving contact.