CN204332854U - A kind of transmission device of auxiliary switch for circuit breaker - Google Patents

Abstract

A transmission device for an auxiliary switch of a circuit breaker, which includes a housing (1), characterized in that: the housing (1) is equipped with a circuit board (2) and a rotating shaft (3), and the circuit board (2) is fixed There is a micro switch (4) and a connection terminal (5), the connection terminal (5) is connected with the output signal end of the micro switch (4), the rotating shaft (3) can rotate in the housing (1), and can be connected with the The micro switch (4) contacts or separates to realize switching of the on-off state of the micro switch (4), and the rocker end (301) of the rotating shaft (3) protrudes from the casing (1) and rests on the movable bracket (6) Above, the movable support (6) is connected with the operating mechanism rotating shaft cantilever (7) and can reciprocate up and down with the rotation of the operating mechanism rotating shaft cantilever (7), and the rotating shaft (3) can rotate with the movable support (6) reciprocating up and down. The auxiliary switch avoids secondary plugging in the signal transmission process of the auxiliary switch of the circuit breaker, makes the auxiliary switch directly connected with the terminal, improves the reliability in the signal transmission process of the auxiliary switch of the circuit breaker, and simplifies the structure of the auxiliary switch.

Description

Transmission device for circuit breaker auxiliary switch

technical field

The utility model belongs to the technical field of auxiliary equipment for low-voltage electrical appliances, and in particular relates to a transmission device for an auxiliary switch of a circuit breaker, which improves the reliability of the auxiliary switch control.

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 are seriously overloaded or short-circuited or under-voltage. Its function is equivalent to that of 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 inside of the circuit breaker usually needs to be matched with an auxiliary switch. The function of the auxiliary switch is to respond to the action of the circuit breaker operating mechanism and change its own on-off state to provide an electrical indication signal of the circuit breaker's operating state. Common auxiliary switches on the market are usually located inside the circuit breaker body, close to the operating mechanism. The state transition of the micro switch in the auxiliary switch is realized through the cantilever of the operating mechanism. The signal of the micro switch is transmitted to the connection terminal through the wire to realize the output of the signal. The signal of the existing traditional circuit breaker auxiliary switch must be transmitted through the wire through the terminal. There are many intermediate links, and the reliability of the connection with the circuit breaker is difficult to guarantee. Poor contact is prone to occur, resulting in signal transmission failure. In addition, too many transmission links make installation and maintenance complicated.

Utility model content

The purpose of this utility model is to provide a transmission device for the auxiliary switch of the circuit breaker to avoid the technical defect of the existing auxiliary switch of the circuit breaker, which is prone to poor contact and cause signal transmission failure. Secondary plugging enables the auxiliary switch to be directly connected to the terminal, which improves the reliability in the signal transmission process of the auxiliary switch of the circuit breaker and simplifies the structure of the auxiliary switch.

Technical solutions

In order to achieve the above technical purpose, the utility model designs a transmission device for an auxiliary switch of a circuit breaker. Connecting terminal, the connecting terminal is connected with the output signal end of the micro switch, the rotating shaft can rotate in the casing, and can contact or separate from the micro switch during the rotating process, so as to realize the switching of the opening and closing state of the micro switch, the rocker end of the rotating shaft Stretch out the shell and ride on the movable support, the movable support is connected with the operating mechanism rotating shaft cantilever and can reciprocate up and down with the rotation of the operating mechanism rotating shaft cantilever, and the rotating shaft can rotate with the movable support reciprocating up and down.

Further, the movable bracket is provided with a connecting groove, and the connecting groove is installed on the connecting column of the circuit breaker body base. One end of the movable bracket is against the rocker end of the rotating shaft, and the other end is in cantilever contact with the rotating shaft of the operating mechanism.

Further, the contact end of the movable support and the rocker arm end of the rotating shaft is a plane, and the contact end of the movable support and the operating mechanism rotating shaft cantilever is equipped with a spring leaf, and the operating mechanism rotating shaft cantilever is eccentrically installed on the operating mechanism rotating shaft, and the spring leaf and the operating mechanism rotating shaft cantilever touch.

Further, the housing is mounted on a fixed bracket, and the fixed bracket is fixedly mounted on the base of the circuit breaker body or the side plate of the drawer seat.

Further, the rotating shaft is installed in the base hole of the casing, and the rotating shaft is located on one side of the micro switch, and a toggle block is arranged on the rotating shaft, and the toggle block can trigger the micro switch during the rotation of the rotating shaft.

Further, the connecting groove is a long waist-shaped slot, which is vertically arranged on the movable support.

Beneficial effect

The utility model provides a transmission device for an auxiliary switch of a circuit breaker, which avoids the secondary plugging in the signal transmission process of the auxiliary switch of the circuit breaker, makes the auxiliary switch directly connected with the terminal, and improves the signal transmission process of the auxiliary switch of the circuit breaker. reliability, simplifying the structure of the auxiliary switch.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model.

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

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is described further

Example 1

As shown in Figures 1 and 2, a transmission device for an auxiliary switch of a circuit breaker includes a housing 1, a circuit board 2 and a rotating shaft 3 are installed in the housing 1, and a micro switch 4 is fixed on the circuit board 2 Connect with the terminal 5, the terminal 5 is connected to the output signal end of the micro switch 4, the rotating shaft 3 can rotate in the housing 1, and can be in contact with or separated from the micro switch 4 during the rotation, so as to realize the opening and closing state of the micro switch 4 Switching, the rocker end 301 of the rotating shaft 3 stretches out from the housing 1 and rides on the movable support 6, the movable support 6 is connected with the operating mechanism rotating shaft cantilever 7 and can reciprocate up and down with the rotation of the operating mechanism rotating shaft cantilever 7, and the rotating shaft 3 can Rotate with movable support 6 reciprocating up and down.

Specifically, the movable bracket 6 is provided with a connecting groove 601, the connecting groove 601 is a long waist-shaped slot hole, which is vertically arranged on the movable bracket 6, and the connecting groove 601 is installed on the connecting column of the base 8 of the circuit breaker body. 801 , one end of the movable bracket 6 is against the rocker end 301 of the rotating shaft 3 , and the other end is in contact with the operating mechanism rotating shaft cantilever 7 .

The contact end of the rocker arm end 301 of described movable support 6 and rotating shaft 3 is plane, and movable support 6 and operating mechanism rotating shaft cantilever 7 contact ends are equipped with spring piece 9, operating mechanism rotating shaft cantilever 7 is eccentrically installed on the operating mechanism rotating shaft, spring Sheet 9 is in contact with operating mechanism rotating shaft cantilever 7 .

The housing 1 is installed on a fixed bracket, and the fixed bracket is fixedly installed on the circuit breaker body base 8 or the side plate of the drawer seat.

The rotating shaft 3 is installed in the base hole 101 of the housing 1, the rotating shaft 3 is located on the side of the micro switch 4, and the rotating shaft 3 is provided with a toggle block 302, and the toggle block 302 can trigger the micro switch 4 during the rotation of the rotating shaft 3. .

When the circuit breaker is in the closed state, the rotating shaft cantilever 7 of the operating mechanism rotates counterclockwise and separates from the movable support 6, and the movable support 6 moves downward to the end, the rotating shaft 3 rotates counterclockwise under the torque drive, and the toggle block 302 on the rotating shaft 3 is in contact with the micro The button of the micro switch 4 is separated to realize the state transition of the micro switch 4.

When the circuit breaker is in the opening state, the operating mechanism rotating shaft cantilever 7 rotates clockwise, pushing the movable bracket 6 to move upward, the upper part of the movable bracket 6 pushes the rotating shaft 3 to rotate clockwise, and the toggle block 302 on the rotating shaft 3 pushes the button of the micro switch 45 , to realize the state transition of the micro switch 4.

Claims (6)

1. A transmission device for an auxiliary switch of a circuit breaker, which includes a housing (1), characterized in that: the housing (1) is equipped with a circuit board (2) and a rotating shaft (3), and the circuit board (2) is The micro switch (4) and the connection terminal (5) are fixedly installed, the connection terminal (5) is connected with the output signal end of the micro switch (4), and the rotating shaft (3) can rotate in the housing (1). It can be contacted or separated from the micro switch (4) to realize the on-off state switching of the micro switch (4). The rocker end (301) of the rotating shaft (3) protrudes from the housing (1) and rests on the movable bracket ( 6), the movable support (6) is connected with the operating mechanism rotating shaft cantilever (7) and can reciprocate up and down with the rotation of the operating mechanism rotating shaft cantilever (7), and the rotating shaft (3) can rotate with the movable support (6) reciprocating up and down . 2. A transmission device for an auxiliary switch of a circuit breaker according to claim 1, characterized in that: the movable support (6) is provided with a connecting groove (601), and the connecting groove (601) is installed on the base of the circuit breaker body On the connecting column (801) of (8), one end of the movable support (6) is against the rocker end (301) of the rotating shaft (3), and the other end is in contact with the operating mechanism rotating shaft cantilever (7). 3. The transmission device of a circuit breaker auxiliary switch according to claim 2, characterized in that: the contact end between the movable support (6) and the rocker end (301) of the rotating shaft (3) is a plane, and the movable support (6) A spring leaf (9) is installed at the contact end with the operating mechanism rotating shaft cantilever (7), the operating mechanism rotating shaft cantilever (7) is eccentrically installed on the operating mechanism rotating shaft, and the spring leaf (9) is in contact with the operating mechanism rotating shaft cantilever (7) . 4. The transmission device of a circuit breaker auxiliary switch according to claim 1, characterized in that: the housing (1) is mounted on a fixed bracket, and the fixed bracket is fixed on the base of the circuit breaker body or the drawer seat side panels. 5. A transmission device for an auxiliary switch of a circuit breaker according to claim 1, characterized in that: the rotating shaft (3) is installed in the base hole (101) of the casing (1), and the rotating shaft (3) is located in the micro On one side of the dynamic switch (4), the rotating shaft (3) is provided with a toggle block (302), and the toggle block (302) can trigger the micro switch (4) during the rotation of the rotating shaft (3). 6. A transmission device for an auxiliary switch of a circuit breaker according to claim 2, characterized in that: the connection groove (601) is a long waist-shaped slot hole, and is vertically arranged on the movable support (6).