CN204332875U - A kind of circuit breaker failure resetting device - Google Patents

Abstract

A circuit breaker fault reset mechanism, characterized in that it includes a remote reset electromagnet (1), one end of the iron core (101) of the remote reset electromagnet (1) is connected with a push rod (2), and the other end is against the locking lever (3) The end face (301), the spring (4) is set on the push rod (2), the locking lever (3) is installed on the locking lever shaft (5), and the two ends of the locking lever shaft (5) are installed on the execution unit base ( 6), the locking lever (3) is equipped with a locking torsion spring (7), under the action of the locking torsion spring (7), the locking lever (3) can be close to the swing opening lever (8) to avoid its reverse; the circuit breaker The fault reset mechanism simplifies the motion transmission mechanism of the reset mechanism, reduces the number of parts and assembly, makes the overall layout of circuit breaker parts more compact; reduces the volume of the circuit breaker fault actuator, and improves the stability and stability of motion transmission. reliability.

Description

A circuit breaker fault reset mechanism

technical field

The utility model belongs to the technical field of auxiliary equipment of low-voltage electrical appliances, and specifically relates to a fault reset mechanism of a circuit breaker, which improves the reliability of the fault tripping of the circuit breaker.

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.

As shown in Figure 1, the existing universal circuit breaker has the function of fault tripping. When a fault occurs in the line, after the circuit breaker performs fault tripping, in order to prevent the fault from being closed by mistake when the fault is not eliminated, the circuit breaker is switched on. There is a fault reset structure linked to the trip lever; the fault reset structure includes a mask, a push rod, a mechanism base, a reset lever, a reset spring, a trip lever, and a remote reset mechanism. The push rod passes through the hole of the mask and is linked with the reset lever; the reset lever is installed on the mechanism base, and can rotate around its rotation center and is linked with the trip lever; the iron core of the remote reset is also linked with the reset lever. The fault tripping of the circuit breaker is completed by the rotation of the trip lever. When the circuit breaker trips due to a fault and the trip lever rotates a position angle, the reset lever will be released by linkage with the trip lever under the action of the spring force. Locking, so that the mechanism is in the fault position holding state, and the circuit breaker cannot be re-closed at this time. After the fault is eliminated, the switch can be closed again only after the reset lever is touched by remote reset or manual reset to unlock the trip lever. There are too many linkage mechanisms of this kind of fault reset mechanism, which leads to distortion in the process of motion transmission,

Contents of the invention

In view of the deficiencies of the prior art described above, the purpose of the present invention is to provide a circuit breaker fault reset mechanism for the technical defect that the existing circuit breaker fault reset mechanism has too many linkage mechanisms that easily lead to circuit breaker fault tripping failure, which simplifies The movement transmission mechanism of the execution unit reduces the number of parts and assembly, makes the layout of the overall circuit breaker parts more compact; improves the stability and reliability of the movement transmission of the execution unit.

Technical solutions

In order to achieve the above technical purpose, the present invention designs a circuit breaker fault reset mechanism, which is characterized in that it includes a remote reset electromagnet, one end of the iron core of the remote reset electromagnet is connected with a push rod, and the other end is against the end face of the locking lever, and the push rod is pushed There is a spring on the rod, the locking lever is installed on the locking lever shaft, the two ends of the locking lever shaft are installed on the base of the execution unit, the locking torsion spring is installed on the locking lever, and the locking lever can be close to the swing opening lever under the action of the locking torsion spring avoid its inversion;

The push rod protrudes from the end face of the circuit breaker mask.

Further, the locking lever is provided with a locking end surface, and the locking end surface can be close to the step surface of the swing opening lever under the action of the locking torsion spring.

Further, the swing opening lever is installed on the lever shaft, and the swing opening lever can rotate around the lever shaft. Both ends of the lever shaft are installed on the base of the execution unit. rotational force.

Further, the push rod is installed in the installation groove of the circuit breaker face cover.

Beneficial effect

The circuit breaker fault reset mechanism provided by the present invention simplifies the motion transmission mechanism of the reset mechanism, reduces the number and assembly of parts, makes the layout of the overall circuit breaker parts more compact; reduces the volume of the circuit breaker fault actuator, Improved stability and reliability of motion transmission.

Description of drawings

Accompanying drawing 1 is the structure schematic diagram of existing fault reset mechanism.

Accompanying drawing 2 is a schematic diagram of the installation structure of the utility model.

Accompanying drawing 3 is the structural diagram of remote reset electromagnet in the present invention.

Accompanying drawing 4 is the structure diagram of locking lever in the present invention.

Accompanying drawing 5 is the structure schematic diagram of swing opening lever in the present invention.

Detailed ways

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

Example

As shown in Figures 2 to 5, a circuit breaker fault reset mechanism includes a remote reset electromagnet 1, one end of the iron core 101 of the remote reset electromagnet 1 is connected with a push rod 2, and the other end is against the end face 301 of the locking lever 3 , the spring 4 is set on the push rod 2, the locking lever 3 is installed on the locking lever shaft 5, the two ends of the locking lever shaft 5 are installed on the execution unit base 6, the locking torsion spring 7 is installed on the locking lever 3, and the locking lever 3 is locked. Under the action of the torsion spring 7, the swing opening lever 8 can be tightly attached to avoid its reverse rotation;

The push rod 2 protrudes from the end surface of the circuit breaker cover 8a.

The locking lever 3 is provided with a locking end surface 302 , and the locking end surface 302 can be close to the step surface 801 of the swing opening lever 8 under the action of the locking torsion spring 7 .

The swing opening lever 8 is installed on the lever shaft 9, the swing opening lever 8 can rotate around the lever shaft 9, the two ends of the lever shaft 9 are installed on the execution unit base 6, and the swing opening lever 8 is equipped with a torsion spring 10 make it subject to counterclockwise rotation force.

The push rod 2 is installed in the installation groove of the circuit breaker face cover 8a.

After the circuit breaker trips due to a fault, the step surface 801 of the swing opening lever 8 is locked by the end surface 302 of the locking lever 3, so that it cannot be rotated counterclockwise to return; due to the action of the locking torsion spring 7, the locking lever 3 swings in the locking While opening the brake lever 8, link the push rod 2, and overcome the force of the spring 4 to make the push rod move to the right, and the end face of the push rod is higher than the outer plane of the circuit breaker mask 8a; When the remote reset electromagnet 1 is energized, its iron core 101 moves to the left, pushing the locking lever 3 to rotate counterclockwise, unlocking the swing opening lever 8, and resetting the fault tripping execution unit; The end face, and then the iron core 101 of the linkage remote reset electromagnet 1 moves to the left, and finally the fault tripping execution unit is reset. When remote reset is not selected, the long push rod 2 is selected, and its length can directly touch the plane of the locking lever 3, and the end face of the push rod 2 can be manually pushed to finally reset the fault tripping actuator unit.

Claims (4)

1. A circuit breaker fault reset mechanism, characterized in that: it includes a remote reset electromagnet (1), the iron core (101) of the remote reset electromagnet (1) is connected to a push rod (2) at one end, and the other end is held against The end face (301) of the locking lever (3), the spring (4) is set on the push rod (2), the locking lever (3) is installed on the locking lever shaft (5), and the two ends of the locking lever shaft (5) are installed on the execution unit On the base (6), a locking torsion spring (7) is installed on the locking lever (3), and the locking lever (3) can be close to the swinging opening lever (8) to avoid its reverse rotation under the action of the locking torsion spring (7); The push rod (2) protrudes from the end surface of the circuit breaker cover (8a). 2. A circuit breaker fault reset mechanism according to claim 1, characterized in that: the locking lever (3) is provided with a locking end surface (302), and the locking end surface (302) acts on the locking torsion spring (7) The bottom can be close to the step surface (801) of the swing opening lever (8). 3. A circuit breaker fault reset mechanism according to claim 1, characterized in that: the swing opening lever (8) is installed on the lever shaft (9), and the swing opening lever (8) can rotate around the lever shaft (9) Turn, the two ends of the lever shaft (9) are installed on the execution unit base (6), and the swing opening lever (8) is equipped with a torsion spring (10) to make it subject to counterclockwise rotation force. 4. A circuit breaker fault reset mechanism according to claim 1, characterized in that: the push rod (2) is installed in the installation groove of the circuit breaker mask (8a).