WO2022135044A1

WO2022135044A1 - Lockout device of circuit breaker

Info

Publication number: WO2022135044A1
Application number: PCT/CN2021/133628
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: CN112490089A

Abstract

A lockout device of a circuit breaker, comprising a movable contact seat (1), a lockout (2), a lockout push rod mechanism (3), a connecting rod (4), and a handle (5). A sliding groove (12) is provided above the movable contact seat (1), and the sliding groove (12) comprises a bent part (121) and a straight part (122), wherein the end of the bent part (121) of the sliding groove (12) close to the handle (5) is bent upwards, and the bent part (121) and the straight part (122) are conductively arranged. The upper end of the lockout (2) is provided with an abutting arm (22), and the abutting arm (22) is provided with an abutting surface (221). Once the circuit breaker is disconnected, the top end of a push rod (32) abuts against a side surface of the lockout (2), so that the abutting surface (221) of the lockout (2) presses against the bent part (121) of the sliding groove so as to lock a second end of the connecting rod (4) at the bent part (121) of the sliding groove; and once the second end of the connecting rod (4) is locked at the bent part (121) of the sliding groove, the handle (5) can be pushed to close the circuit breaker. By locking or unlocking the second end of the connecting rod by means of using the aforementioned solution, the closing or disconnecting of the circuit breaker is implemented. The installation is convenient, the actions are stable, and no misoperations occur.

Description

A locking device for a circuit breaker

technical field

The utility model relates to a circuit breaker, in particular to a locking device inside the circuit breaker.

Background technique

Existing circuit breaker product locking mechanisms are generally provided with levers, locks, and jumpers, which are complex in structure and high in cost.

SUMMARY OF THE INVENTION

The utility model overcomes the problems existing in the prior art, and provides a novel locking mechanism of a circuit breaker with reasonable structure and stable operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a lock device of a circuit breaker, comprising a movable contact seat, a lock, a lock push rod mechanism, a connecting rod and a handle, wherein the first end of the connecting rod The movable contact is arranged on the handle, the second end is arranged on the movable contact seat, the movable contact seat is provided with a convex column, and the lock catch is sleeved on the convex column through the through hole provided on it, and it is characterized in that: the lock The push rod mechanism includes a spring and a push rod. The elastic force of the spring acts on the push rod, and the top end of the push rod abuts on the lock catch. The upper part of the movable contact seat is provided with a chute, and the chute includes a curved part and a The straight part, the curved part of the chute is bent upward at one end close to the handle, the curved part and the straight part are connected to each other, the upper end of the lock is provided with a counter arm, and the counter arm is provided with a counter surface, after the circuit breaker is disconnected The top end of the push rod is in contact with the side of the lock catch, so that the contact surface of the lock catch is close to the curved part of the chute so that the second end of the connecting rod is locked on the curved part of the chute, and the second end of the connecting rod is locked behind 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 latch, and the latch rotates, the contact surface loses the locking of the second end of the connecting rod, and the second end of the connecting rod can slide in The straight part of the chute realizes the opening of the circuit breaker.

By adopting the above solution, a new method is adopted to lock or unlock the second end of the connecting rod, so as to realize the action of closing or disconnecting the circuit breaker. The above method is easy to install, stable in operation, and will not cause malfunction; bending The part is set to be bent upward, so that the handle is opposite to the traditional circuit breaker in the closing position and the tripping position, to meet the needs of different customers, and the traditional circuit breaker cannot be reversed.

The utility model is further provided as follows: the upper side of the bending part is provided with a pressing limit surface, the second end of the connecting rod abuts against the pressing limit surface after the circuit breaker is closed, and the handle is the first to the connecting rod. The included angle between the thrust direction generated by the two ends and the thrust direction generated by the pressing limit facing the second end of the connecting rod is less than 180 degrees.

By adopting the above solution, it is ensured that the second end of the connecting rod can move to the straight part of the chute under the action of the external force, so that the circuit breaker can be tripped normally.

The utility model is further provided as follows: 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 the contact periphery of the sliding groove is provided with a groove.

By adopting the above solution, the contact arm can better press the second end of the connecting rod against the curved portion, and the inclined plane can facilitate the connecting rod to slide into the curved portion, which can well ensure the next closing success. Of course, we can also not set the hypotenuse, and use the arc transition angle to transition.

The utility model is further provided as follows: the movable contact seat is provided with a convex block above the chute, and the convex block is provided with an arc surface at the curved part, and the arc surface and the pressing limit surface are integrally connected to form a connecting rod The pressing limit surface of the second end.

By adopting the above solution, it is ensured that the area of the pressing limiting surface is large, so that the pressing effect on the second end of the connecting rod is better, and the second end of the connecting rod can be stably fixed on the curved portion.

The utility model is further provided as follows: the pressing and limiting surface is divided into a limiting surface and a pressing surface, wherein the limiting surface is located at the top end of the curved portion, the pressing surface is located at the upper bending position of the curved portion, and the circuit breaker is closed. During the locking process, the second end of the connecting rod abuts against the pressing surface.

By adopting the above solution, the movement and locking of the product to the second end of the connecting rod are further ensured, and the stability of the product is greatly improved.

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

Description of drawings

Fig. 1 is the schematic diagram reflecting the internal structure of the embodiment of the present utility model;

2 is a perspective view of a lock 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;

FIG. 4 is a structural diagram of a locking push rod mechanism according to an embodiment of the present invention;

Fig. 5 is the force analysis diagram of the embodiment of the utility model.

Detailed ways

As shown in Figures 1-5, a lock device of a circuit breaker includes a movable contact base 1, a lock 2, a lock push rod mechanism 3, a connecting rod 4 and a handle 5, wherein the No. 1 of the connecting rod 4 One end is movably arranged on the handle 5, the second end is arranged on the movable contact base 1, the movable contact base 1 is provided with a convex column 11, and the lock catch 2 is sleeved on the convex column 11 through the through hole 21 set on it. Above, the lock push rod mechanism 3 includes a spring 31 and a push rod 32, the elastic force of the spring 31 acts on the push rod 32, and the top end of the push rod 32 abuts on the lock catch 2, here we want to explain that the spring is another One end can be in contact with the circuit breaker housing or against the bracket fixedly connected with the housing. In this embodiment, it is against the bracket connected with the housing. A chute 12 is provided above the movable contact base 1 . , the chute 12 includes a curved portion 121 and a straight portion 122, the curved portion 121 of the chute 12 is bent upward at one end close to the handle 5, the curved portion 121 and the straight portion 122 are connected to each other, and the upper end of the lock 2 is provided There is a resisting arm 22, and a resisting surface 221 is provided on the resisting arm 22. After the circuit breaker is disconnected, the top end of the push rod 32 resists the side of the lock 2, so that the contact surface 221 of the lock 2 is close to the curved portion 121 of the chute so as to connect The second end of the rod 4 is locked in the curved part 121 of the chute, and the second end of the connecting rod 4 is locked in the curved part 121 of the chute, and the handle 5 can be pushed to close the circuit breaker; the release mechanism of the circuit breaker after the circuit breaker is closed When the lock 2 is moved and the lock 2 is rotated, the contact surface 221 loses the lock on the second end of the connecting rod 4. At this time, the second end of the connecting rod 4 can slide into the straight part 122 of the chute 12 to realize the opening of the circuit breaker. The tripping mechanism of the circuit breaker is provided in the existing circuit breaker, also known as a tripper, and we will not describe it in detail. Lock or unlock the end of the circuit breaker to realize the action of closing or opening the circuit breaker. The above method is easy to install, stable in operation, and will not cause misoperation; the bending portion 121 is set to be bent upward, so that the handle 4 is in the closing position and the opening position. The position is opposite to that of traditional circuit breakers, which solves the problem that traditional circuit breakers cannot be set in the opposite direction, and meets the needs of different installations of customers.

In the embodiment of the present invention, the upper side of the curved portion 121 is provided with a pressing limit surface 1211. After the circuit breaker is closed, the second end of the connecting rod 4 abuts against the pressing limit surface 1211. At this time, the handle The included angle A between the thrust direction F1 generated by the second end of the connecting rod 4 and the thrust direction F2 generated by the pressing limiting surface 1211 on the second end of the connecting rod 4 is less than 180 degrees. The above solution ensures that under the action of external force, the second end of the connecting rod 4 can move toward the straight portion 122 of the chute, so that the circuit breaker can be normally tripped.

In the embodiment of the present invention, the contact surface 221 on the contact arm 22 is L-shaped, and the lower part of the contact surface 221 is provided with an inclined surface 222 that facilitates the second end of the connecting rod 4 to slide into the curved portion 121 . A groove 123 is provided on the periphery. By adopting the above solution, the contact arm 22 can better press the second end of the connecting rod 4 against the curved portion 121 , and the inclined surface 222 can facilitate the connecting rod 4 to slide into the curved portion 121 . The second closing is successful, of course, we can also not set the hypotenuse 222, and use the arc transition angle to transition.

In the embodiment of the utility model, the movable contact base 1 is provided with a convex block 13 located above the sliding groove 12 , and the convex block 13 is provided with an arc surface at the curved portion 121 , and the arc surface is connected with the pressing limit surface 1211 . The pressing limit surface 1211 of the second end of the connecting rod 4 is integrally formed, which can ensure that the area of the pressing limiting surface 1211 is as large as possible, so that the pressing effect on the second end of the connecting rod 4 is better. The two ends are stably fixed on the curved portion 121 . The pressing limiting surface 1211 is divided into a limiting surface 12111 and a pressing surface 12112, wherein the limiting surface 12111 is located at the top of the curved portion 121, and the pressing surface 12112 is located at the upper bending position of the curved portion 121, and the circuit breaker is closed. During the process, the second end of the connecting rod 4 abuts against the pressing surface 12112 . The above solution further ensures the movement and locking of the product to the second end of the connecting rod 4, and greatly improves the stability of the product.

Claims

A locking device of a circuit breaker, comprising a moving contact seat, a locking buckle, a locking push rod mechanism, a connecting rod and a handle, wherein the first end of the connecting rod is movably arranged on the handle, and the second end is arranged on the moving contact On the head seat, the movable contact seat is provided with a convex column, and the lock is sleeved on the convex column through the through hole provided on the convex column. The elastic force acts on the push rod, the top end of the push rod abuts on the lock, a chute is provided above the movable contact seat, and the chute includes a curved part and a straight part, and the curved part of the chute is close to the One end of the handle is bent upward, and the curved part and the straight part are connected to each other. The upper end of the lock is provided with a resistance arm, and the resistance arm is provided with a resistance surface. 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; the circuit breaker is closed When the release mechanism of the rear circuit breaker acts on the lock and rotates the lock, the contact surface loses the locking of the second end of the connecting rod. At this time, the second end of the connecting rod can slide into the straight part of the chute to open the circuit breaker.
The locking device of the circuit breaker according to claim 1, wherein a pressing limit surface is provided on the upper side of the curved portion, and the second end of the connecting rod abuts against the pressing limit after the circuit breaker is closed At this time, the included 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 locking device of the circuit breaker according to claim 2, characterized in that: the contact surface on the contact arm is L-shaped, and the lower part of the contact surface is provided with an inclined surface that facilitates the second end of the connecting rod to slide into the curved part, and the chute There are grooves on the perimeter of the interference.
The locking device of the circuit breaker according to claim 2, wherein the movable contact seat is provided with a convex block above the chute, and the convex block is provided with a curved surface at the curved portion, and the curved surface is in contact with the contact surface. The pressure limit surface is connected to form a pressure limit surface of the second end of the connecting rod.
The locking device of the circuit breaker according to claim 3, wherein the movable contact seat is provided with a convex block above the chute, and the convex block is provided with a curved surface at the curved portion, and the curved surface is in contact with the contact surface. The pressure limit surface is connected to form a pressure limit surface of the second end of the connecting rod.
The locking device of the circuit breaker according to claim 2, characterized in that: the pressing limiting surface is divided into a limiting surface and a pressing surface, wherein the limiting surface is located at the top end of the curved portion, and the pressing surface is located on the curved portion. The upper bending position of the circuit breaker, the second end of the connecting rod abuts against the pressing surface during the closing process of the circuit breaker.
The locking device of the circuit breaker according to claim 4, wherein the pressing limiting surface is divided into a limiting surface and a pressing surface, wherein the limiting surface is located at the top end of the curved portion, and the pressing surface is located on the curved portion. The upper bending position of the circuit breaker, the second end of the connecting rod abuts against the pressing surface during the closing process of the circuit breaker.