CN104332363B - Switching off-and-on operating mechanism for circuit breaker - Google Patents

Abstract

An opening and closing operating mechanism for a circuit breaker, which includes a side plate (1), characterized in that: the side plate (1) is hinged with a half shaft (2), a trip lever (3), a rotating shaft (4) and energy storage rod (5), fixedly equipped with trip rod stop shaft (6a), stop shaft (6) and limit shaft (7), on the described rotating shaft (4) is fixedly equipped with cantilever ( 8), the trip lever (3) is hinged with the front link (9), the front link (9) is hinged with the rear link (10), the rear link (10) is hinged with the cantilever (8), and the roller (11) Set between the front connecting rod (9) and the rear connecting rod (10) or on the front connecting rod (9) or on the rear connecting rod (10); The two-stage transmission is one-stage transmission. The one-stage rotation ensures a reasonable contact force between the trip lever (3) and the half shaft (4), and at the same time transmits the force to the operating mechanism in the closed state to the rotating shaft (4) and the trip lever (4). The rotating shaft of the buckle bar not only reduces the parts of the whole mechanism, but also improves the reliability of the transmission and speeds up the opening and closing of the circuit breaker.

Description

An opening and closing operating mechanism for a circuit breaker

technical field

The invention belongs to the technical field of low-voltage electrical equipment, and specifically relates to an opening and closing operation mechanism for a circuit breaker, which can improve the opening and closing speed and reliability of the circuit breaker, and has a simple structure and convenient operation.

Background technique

Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Low-voltage circuit breaker, also known as automatic switch, commonly known as "air switch", also refers to low-voltage circuit breaker. It is an electrical appliance that not only has the function of manual switch, but also can automatically protect against voltage loss, undervoltage, overload, and short circuit. It can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, etc., and can automatically cut off the circuit when they have severe overload, short circuit and undervoltage faults. Its function is equivalent to a fuse switch and The combination of overheating and underheating relays, etc., and generally does not need to change parts after breaking the fault current, has been widely used.

The opening and closing operating mechanism of the universal circuit breaker is one of the important parts in the spring operating mechanism of the circuit breaker. Its function is to cooperate with the energy storage mechanism to complete the closing, opening and tripping actions, and to ensure the locking of each working state. As shown in accompanying drawing 1, most of the existing circuit breaker closing and opening operating mechanisms are more complex in structure, resulting in slower closing and opening speeds and low operational reliability.

Chinese patent CN1017709044A discloses a shaft connection system in the operating mechanism of a circuit breaker. The shaft connection system connects the main shaft of the circuit breaker, the cantilever on the main shaft and the four-bar linkage mechanism of the circuit breaker. The shaft connection system includes: connecting pins, connecting The cantilever on the main shaft; the connecting roller is set on the connecting pin; the rotating shaft; the cam is connected to the rotating shaft and rotates around the rotating shaft; wherein, one side of the cam is connected to the four-bar linkage mechanism, and the other side of the cam is in contact with the connecting roller. This invention can reduce the tripping force of the operating mechanism, but the whole mechanism realizes the opening and closing movement through two-stage transmission, the transmission is complicated, the precision is not high, the opening and closing speed is slow, and the performance of the circuit breaker is reduced.

Contents of the invention

The purpose of the present invention is to provide a circuit breaker opening and closing mechanism for the technical defects of the existing opening and closing mechanism of the circuit breaker, which has complex structure, slow opening and closing speed caused by two-stage transmission, and insufficient transmission reliability. The gate operating mechanism is changed from the second-stage transmission of the circuit breaker opening and closing mechanism in the prior art to the first-stage transmission, which not only reduces the parts of the entire mechanism, but also improves the reliability of the transmission and speeds up the opening and closing speed of the circuit breaker .

Technical solutions

In order to achieve the above technical purpose, the present invention designs an opening and closing operating mechanism for a circuit breaker, which includes a side plate, which is characterized in that: the side plate is hinged with a half shaft, a trip lever, a rotating shaft and an energy storage The trip rod is fixedly equipped with a stopper shaft, a stopper shaft and a limit shaft. The shaft is fixed with a cantilever. The trip bar is hinged with the front connecting rod, and the front connecting rod is hinged with the rear connecting rod. The connecting rod is hinged with the cantilever, and the roller is arranged between the front connecting rod and the rear connecting rod or on the front connecting rod or on the rear connecting rod;

The semi-axis can rotate around its own hinge point, and the trip lever can rotate around its own hinge point. During the rotation process, the trip lever can be tangent to the semi-axis and the trip lever stop axis respectively, and the energy storage rod can rotate around its own hinge point. Rotation, the rotation of the energy storage rod can drive the roller to move, thereby driving the movement of the front connecting rod and the rear connecting rod that are hinged to each other, the movement of the rear connecting rod drives the rotation of the cantilever, the rotation of the cantilever drives the rotation of the shaft, and the rotation of the cantilever can be limited The bit axis limits the rotation stroke, and the movement stroke can be limited by the stop shaft during the movement of the front link.

The tripping rod can rotate to the same rotation center as the rear connecting rod and the energy storage rod during the rotation process. The limiting shaft is located at the lower part of the front connecting rod.

The stop shaft is located above the rear connecting rod.

The trip rod stop shaft is located below the half shaft.

Beneficial effect

In the present invention, the secondary transmission of the circuit breaker opening and closing mechanism in the prior art is changed to a primary transmission. The primary rotation ensures a reasonable contact force between the trip lever and the half shaft, and at the same time reduces the force given to the operating mechanism in the closing state. It is transmitted to the rotating shaft and the tripping rod rotating shaft, which not only reduces the parts of the whole mechanism, but also improves the reliability of the transmission and speeds up the opening and closing speed of the circuit breaker.

Description of drawings

Accompanying drawing 1 is the structure schematic diagram of the opening state of the present invention.

Accompanying drawing 2 is the structure diagram of closing state of the present invention.

Accompanying drawing 3 is the structure schematic diagram of tripping state of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Example

An opening and closing operating mechanism for a circuit breaker, which includes a side plate 1, wherein the side plate 1 is hingedly equipped with a half shaft 2, a trip lever 3, a rotating shaft 4 and an energy storage rod 5, and is fixedly equipped with Trip rod stop shaft 6a, stop shaft 6 and limit shaft 7, cantilever 8 is fixedly installed on the rotating shaft 4, the trip rod 3 is hinged with the front connecting rod 9, and the front connecting rod 9 is connected with the rear connecting rod 10 is hinged, the rear link 10 is hinged with the cantilever 8, and the roller 11 is arranged between the front link 9 and the rear link 10 or on the front link 9 or on the rear link 10;

The semi-axis 2 can rotate around its own hinge point, and the trip lever 3 can rotate around its own hinge point. During the rotation of the trip lever 3, it can be tangent to the semi-axis 2 and the trip lever stop shaft 6a respectively. 5 can rotate around its own hinge point, and the rotation process of the energy storage rod 5 can drive the roller 11 to move, thereby driving the front connecting rod 9 and the rear connecting rod 10 which are hinged to each other to move, and the movement of the rear connecting rod 10 drives the cantilever 8 to rotate, and the cantilever 8 The rotation drives rotating shaft 4 to rotate, and cantilever 8 can be limited rotation stroke by limit shaft 7 during rotation, and front link 1 can be limited motion stroke by stop shaft 6 during motion.

The tripping rod 3 can rotate to the same rotation center as the rear connecting rod 10 and the energy storage rod 5 during the rotation process.

The position limiting shaft 7 is located below the front connecting rod 9 .

The stop shaft 6 is located above the rear connecting rod 10 .

The trip rod stop shaft 6 a is located below the half shaft 2 .

The working process of the present invention is as shown in accompanying drawing 1, under the opening state: when the energy storage rod 5 is in the energy storage position under the action of the energy storage spring, the tripping rod 3 hinged with the front connecting rod 9 stops with the tripping rod. The stop shaft 6a is tangent, the cantilever 8 on the rotating shaft 4 is tangent to the limit shaft 7 and the stroke is limited, the front connecting rod 9 and the rear connecting rod 10 can contact the energy storage rod 5 through the roller 11, and then the rotating shaft 4 reverses. The closing action starts after the hour hand rotates.

As shown in Figure 2, in the closing state, the trip lever 3 is tangent to the half shaft 2, the front connecting rod 9 is tangent to the stop shaft 6 and the stroke is limited, and the cantilever 8 on the rotating shaft 4 is separated from the limit shaft 7 and the side Plate 1 forms a certain angle, and at this moment, trip lever 3 rotates to the same rotation center with front connecting rod 9 and energy storage rod 5 three.

In the tripped state as shown in Figure 3, when the energy storage rod 5 is in the energy release position, the trip rod 3 leaves the half shaft 2, the front connecting rod 9 leaves the stop shaft 6, the cantilever 8 on the rotating shaft 4 and the limit shaft 7 Tangent.

In the present invention, the secondary transmission of the circuit breaker opening and closing mechanism in the prior art is changed to a primary transmission. The primary rotation ensures a reasonable contact force between the trip lever 3 and the half shaft 2, and at the same time, the operating mechanism in the closing state The force is transmitted to the rotating shaft 4 and the tripping rod rotating shaft, which not only reduces the parts of the whole mechanism, but also improves the reliability of the transmission and accelerates the opening and closing speed of the circuit breaker.

The technical content to be protected in the present invention is not limited to the technical solution provided in this embodiment, and any technical solution inspired by this embodiment falls within the protection scope of the present invention.

Claims (4)

1. An opening and closing operating mechanism for a circuit breaker, which includes a side plate (1), characterized in that: the side plate (1) is hingedly equipped with a half shaft (2), a trip lever (3) , rotating shaft (4) and energy storage rod (5), fixedly equipped with trip rod stop shaft (6a), stop shaft (6) and limit shaft (7), fixedly equipped with on the described rotating shaft (4) Cantilever (8), the trip lever (3) is hinged with the front link (9), the front link (9) is hinged with the rear link (10), and the rear link (10) is hinged with the cantilever (8), The roller (11) is arranged between the front connecting rod (9) and the rear connecting rod (10) or on the front connecting rod (9) or on the rear connecting rod (10); The semi-axis (2) can rotate around its own hinge point, and the trip lever (3) can rotate around its own hinge point. The axis (6a) is tangent, the energy storage rod (5) can rotate around its own hinge point, and the rotation process of the energy storage rod (5) can drive the roller (11) to move, thereby driving the front connecting rod (9) and the rear connecting rod (9) which are hinged to each other The connecting rod (10) moves, and the movement of the rear connecting rod (10) drives the cantilever (8) to rotate, and the rotation of the cantilever (8) drives the rotating shaft (4) to rotate. During the rotation of the cantilever (8), the limit shaft (7) can Restricting the rotation stroke, the movement stroke can be limited by the stop shaft (6) during the movement of the front connecting rod (1); The tripping rod (3) can rotate to the same rotation center as the rear connecting rod (10) and the energy storage rod (5) during the rotation process. 2. The opening and closing operating mechanism for a circuit breaker according to claim 1, characterized in that: the position limiting shaft (7) is located below the front connecting rod (9). 3. An opening and closing operating mechanism for a circuit breaker according to claim 1, characterized in that: the stop shaft (6) is located above the rear connecting rod (10). 4. An opening and closing operating mechanism for a circuit breaker according to claim 1, characterized in that: the trip lever stop shaft (6a) is located below the half shaft (2).