High-voltage power distribution cabinet circuit breaker handcart assembly

Abstract

The utility model relates to the technical field of circuit breaker handcarts, in particular to a high-voltage power distribution cabinet circuit breaker handcart assembly which comprises a circuit breaker body, the circuit breaker body is installed above a ground rail on the rear side of a high-voltage power distribution cabinet in a matched mode, the bottom of the ground rail is fixed on the ground, and two static contact terminals are installed on the rear side of the high-voltage power distribution cabinet. A handcart walking mechanism is arranged at the bottom of the circuit breaker body, moving contact units are arranged on the front side of the circuit breaker body from top to bottom, and an emergency retreating mechanism is installed in the middle of the front side wall of the circuit breaker body between the two moving contact units. When the circuit breaker handcart assembly works, the circuit breaker handcart assembly can move towards one side of a high-voltage power distribution cabinet according to needs, and after the circuit breaker handcart assembly moves in place, closing conduction is achieved through cooperation of the movable contact units and the corresponding static contact terminals; rapid separation of the moving contact unit and the static contact terminal is realized by controlling the handcart walking mechanism to return.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker trolleys, in particular to a circuit breaker trolley assembly for a high-voltage power distribution cabinet. Background Art

[0002] The circuit breaker trolley is a component unit of the high-voltage distribution cabinet switchgear. Its main function is to open and close the circuit so that in abnormal situations such as short circuit, overload, etc., it can cut off the power supply in time to protect the safety of the circuit and equipment.

[0003] The traditional circuit breaker trolley is mainly composed of four parts: the trolley body, the main circuit connector, the auxiliary circuit connector and the trolley position information interface. At the same time, it is also equipped with a specific guide rail for the circuit breaker trolley to slide inside it to achieve the purpose of running and staying in different positions.

[0004] For example, a circuit breaker trolley structure for a center cabinet is disclosed in a patent document with a patent authorization publication number of CN214314221U, whose main structure includes a circuit breaker trolley body, a moving contact is arranged on the right side of the circuit breaker trolley body, a roller is arranged at the lower end of the circuit breaker trolley body, a slide block is arranged at the lower end of the roller, a center cabinet body is arranged at the right end of the slide block, a static contact corresponding to the moving contact is arranged on the left side of the center cabinet body, a motor is arranged inside the bottom of the center cabinet body, a driving roller is arranged at the output end of the motor, a dustproof belt is arranged on the driving roller, a guide roller is arranged below the motor, and a fixed block is connected to one end of the dustproof belt close to the circuit breaker trolley body, the fixed block is fixed to the bottom of the circuit breaker trolley body, and the dustproof belt is arranged inside the slide block.

[0005] It can be seen from the circuit breaker structure in the above-mentioned prior art that when opening the circuit, it still uses the original propulsion mechanism of the circuit breaker to complete the forward or backward movement along the track, lacks a safety separation mechanism, and after the dynamic and static joints come into contact, it may be difficult to enter or exit the vehicle due to a fault, which poses a safety hazard to the safe operation of the high-voltage distribution cabinet.

[0006] To this end, the utility model optimizes and improves the problem of difficulty in getting circuit breakers in and out of the vehicle in the prior art, and specially designs a new type of high-voltage distribution cabinet circuit breaker trolley assembly that can achieve safe separation of dynamic and static joints after contact, so as to better solve the problems existing in the prior art. Utility Model Content

[0007] The utility model is to solve one of the above technical problems, and the technical scheme adopted is: a high-voltage distribution cabinet circuit breaker trolley assembly, comprising a circuit breaker body, the circuit breaker body is mounted above the ground rail on the rear side of the high-voltage distribution cabinet, the bottom of the ground rail is fixed on the ground, two static contact terminals are installed on the rear side of the high-voltage distribution cabinet, a trolley walking mechanism is arranged at the bottom of the circuit breaker body, the bottom of the trolley walking mechanism is mounted in the track groove of the ground rail, moving contact units are arranged from top to bottom on the front side of the circuit breaker body, the moving contact units are used to be plugged and conductively matched with the static contact terminals at corresponding positions, an emergency retraction mechanism is installed in the middle of the front side wall of the circuit breaker body between the two moving contact units, and the emergency retraction mechanism is used to achieve safe separation of the moving contact unit from the static contact terminals.

[0008] In any of the above solutions, preferably, safety separation mechanisms are symmetrically arranged on the upper and lower parts of the emergency retreat mechanism, respectively.

[0009] In any of the above schemes, preferably, the moving contact unit includes a moving contact fixedly mounted on the front side of the circuit breaker body, and the moving contact is inserted into the static contact terminal at the corresponding position and conductively connected in a working state, and the conductive tube section at the rear end of the moving contact is fitted into the front end conductive shaft of the contact arm sleeved on the front side wall of the circuit breaker body and is pin-connected and fixed in the radial direction.

[0010] In any of the above schemes, preferably, the emergency retraction mechanism includes a horizontal push cylinder fixedly installed in the middle of the front side wall of the circuit breaker body, an insulating push plate is fixedly installed on the front end of the piston rod of the horizontal push cylinder, an insulating protective shell is provided on the outer cover of the horizontal push cylinder, the rear end of the insulating protective shell is fixed on the front side wall of the circuit breaker body, and the safety separation mechanism is fixedly installed on the upper and lower parts of the insulating protective shell respectively, and when the moving contact unit cooperates with the corresponding static contact terminal, the front end of the insulating push plate abuts against the rear side of the high-voltage distribution cabinet.

[0011] In any of the above schemes, preferably, the safety separation mechanism includes a vertical telescopic cylinder fixedly mounted on the corresponding side wall of the insulating protective shell, and the end of the piston rod of the vertical telescopic cylinder extends into the through pin shaft hole of the conductive pipe section and the front end conductive shaft section and connects and fixes the two along their radial direction with pins.

[0012] Preferably, in any of the above schemes, an insulating coating is sprayed on the outer side wall of the cylinder barrel of each of the vertical telescopic cylinders.

[0013] In any of the above schemes, preferably, an independent power supply is fixedly installed on the upper part of the insulating protective shell, and the independent power supply is used to supply power to the safety separation mechanism and the emergency retreat mechanism.

[0014] In any of the above schemes, preferably, the trolley walking mechanism includes an inverted U-shaped wheel frame fixedly installed at the bottom of the circuit breaker body, a driving unit is arranged on the front side of the mounting cavity of the inverted U-shaped wheel frame, and a driven unit is arranged on the rear side of the mounting cavity of the inverted U-shaped wheel frame, and the driving unit is used to drive the driven unit to follow and operate synchronously therewith.

[0015] In any of the above schemes, preferably, the driving unit includes a dual-axis output motor fixedly installed in the installation cavity, the motor shafts on both sides of the dual-axis output motor are movably extended to both sides of the inverted U-shaped wheel frame and are respectively connected to the driving wheels, the bottom of the driving wheel is cooperated and installed in the track groove of the ground rail, and a driving pulley is coaxially integrally formed at the outer end of each driving wheel, and the two driving pulleys are respectively connected to the corresponding parts on the driven unit on the rear side through toothed belts.

[0016] In any of the above schemes, preferably, the driven unit includes a driven wheel shaft horizontally arranged in a mounting cavity directly behind the dual-axis output motor, both ends of the driven wheel shaft are movably extended to both sides of the inverted U-shaped wheel frame and are respectively connected to the driven wheels, the bottom of the driven wheel is mounted in the track groove of the ground rail, and a driven pulley is coaxially integrally formed at the outer end of each driven wheel, and the two driven pulleys are respectively connected to the driving pulley on the front side through a toothed belt.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. The circuit breaker trolley assembly can move to one side of the high-voltage distribution cabinet as needed during operation. After moving into position, the moving contact units and the corresponding static contact terminals are used to achieve closing and conduction. When separation is required, the moving contact units and the static contact terminals are quickly separated by controlling the trolley walking mechanism to retreat.

[0019] 2. Considering the situation that the moving contact unit and the static contact terminal cannot be separated due to the failure of the circuit breaker trolley walking mechanism after a safety failure, an emergency retraction mechanism is set here to provide auxiliary retraction force to ensure the safety of the entire circuit breaker body retreating backward.

[0020] 3. In addition, the present application also adds a safety separation mechanism corresponding to each moving contact unit, which can quickly control the safety separation mechanism to enable it to quickly separate the moving contact on the circuit breaker body from the circuit breaker body, thereby achieving the purpose of disconnecting the conductive connection between the circuit breaker body and the high-voltage distribution cabinet, forming double insurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual scale.

[0022] Figure 1 It is a structural schematic diagram of the circuit breaker body of the utility model in a non-working state.

[0023] Figure 2 It is a structural schematic diagram of the circuit breaker body of the utility model in a working state.

[0024] Figure 3 for Figure 1 Schematic diagram of the enlarged cross-sectional structure of part A in the middle.

[0025] Figure 4 for Figure 3 A schematic diagram of a partial cross-sectional structure in which the moving contact and the contact arm are in a separated state.

[0026] Figure 5 It is a schematic diagram of the front sectional structure of the trolley walking mechanism of the utility model.

[0027] Figure 6 It is a side structural schematic diagram of the trolley walking mechanism of the utility model.

[0028] In the figure, 1, circuit breaker body; 101, contact arm; 102, front end conductive shaft; 2, high-voltage distribution cabinet; 3, ground rail; 301, rail groove; 4, static contact terminal; 5, moving contact; 501, conductive pipe section; 6, horizontal push cylinder; 7, insulating push plate; 8, insulating protective shell; 9, vertical telescopic cylinder; 10, independent power supply; 11, inverted U-shaped wheel frame; 12, dual-axis output motor; 13, driving wheel; 14, driving pulley; 15, toothed belt; 16, installation cavity; 17, driven wheel shaft; 18, driven wheel; 19, driven pulley; 20, through pin shaft hole. DETAILED DESCRIPTION

[0029] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. Figure 1-Figure 6 as shown in .

[0030] Embodiment 1: A high-voltage distribution cabinet circuit breaker trolley assembly comprises a circuit breaker body 1, wherein the circuit breaker body 1 is mounted above a ground rail 3 on the rear side of a high-voltage distribution cabinet 2, the bottom of the ground rail 3 is fixed on the ground, two static contact terminals 4 are mounted on the rear side of the high-voltage distribution cabinet 2, a trolley walking mechanism is arranged at the bottom of the circuit breaker body 1, the bottom of the trolley walking mechanism is mounted in a rail groove 301 of the ground rail 3, moving contact units are arranged from top to bottom on the front side of the circuit breaker body 1, the moving contact units are used to be plugged and conductively matched with the static contact terminals 4 at corresponding positions, an emergency retraction mechanism is installed in the middle of the front side wall of the circuit breaker body 1 between the two moving contact units, and the emergency retraction mechanism is used to achieve safe separation of the moving contact unit from the static contact terminal 4. The entire high-voltage distribution cabinet circuit breaker trolley assembly is connected with the high-voltage distribution cabinet 2. When the circuit breaker body 1 is working, it continuously approaches the high-voltage distribution cabinet 2 under the travel action of the trolley walking mechanism, and after being in place, the moving contact unit and the static contact terminal 4 are matched and plugged in to achieve conduction. The locking position of the trolley walking mechanism can ensure the stability of the connection between the moving contact unit and the static contact terminal 4 during normal operation.

[0031] In any of the above schemes, preferably, the moving contact unit includes a moving contact 5 fixedly mounted on the front side of the circuit breaker body 1, and the moving contact 5 is inserted into the static contact terminal 4 at the corresponding position and conductively connected in the working state, and the conductive tube section 501 at the rear end of the moving contact 5 is matched with the front end conductive shaft portion 102 of the contact arm 101 sleeved on the front side wall of the circuit breaker body 1 and is pin-connected and fixed in the radial direction.

[0032] It should be noted that in the present design, the conductive tube section 501 integrally formed at the rear end of the moving contact 5 of the moving contact unit is connected to the front end conductive shaft 102 of the existing contact arm 101 by sleeve connection and positioned by pin connection, so as to ensure stability during normal connection. At the same time, when separation is required, the pin connection part is separated to pick up the axial limit, so as to ensure that it can be quickly separated from the circuit breaker body 1 under the backward reaction force of the emergency retraction mechanism, so as to play the role of safety separation.

[0033] In any of the above schemes, it is preferred that the emergency retraction mechanism includes a horizontal push cylinder 6 fixedly installed in the middle of the front side wall of the circuit breaker body 1, an insulating push plate 7 is fixedly installed at the front end of the piston rod of the horizontal push cylinder 6, an insulating protective shell 8 is provided on the outer cover of the horizontal push cylinder 6, the rear end of the insulating protective shell 8 is fixed on the front side wall of the circuit breaker body 1, and the insurance separation mechanism is fixedly installed on the upper and lower parts of the insulating protective shell 8 respectively, and when the moving contact unit cooperates with the corresponding static contact terminal 4, the front end of the insulating push plate 7 abuts against the rear side of the high-voltage distribution cabinet 2.

[0034] When the trolley travel mechanism stops working due to a fault, the emergency retreat mechanism as a whole relies on the horizontal push cylinder 6 fixedly installed on the circuit breaker body 1 as a driving force. When the horizontal push cylinder 6 extends the piston rod, the insulating push plate 7 at its front end will be forced to push the rear side of the high-voltage distribution cabinet 2. Since the high-voltage distribution cabinet 2 is fixed, the entire circuit breaker body 1 will be forced to move backward along the inside of the rail groove 301 of the ground rail 3, thereby realizing the safe separation of the circuit breaker body 1 and the high-voltage distribution cabinet 2.

[0035] In any of the above solutions, preferably, safety separation mechanisms are symmetrically arranged on the upper and lower parts of the emergency retreat mechanism, respectively.

[0036] In any of the above schemes, it is preferred that the safety separation mechanism includes a vertical telescopic cylinder 9 fixedly mounted on the corresponding side wall of the insulating protective shell 8, and the end of the piston rod of the vertical telescopic cylinder 9 extends into the through pin shaft hole 20 of the conductive pipe segment 501 and the front end conductive shaft portion 102 and connects and fixes the two along their radial direction with a pin.

[0037] When the safety separation mechanism is working, the piston rod of the vertical telescopic cylinder 9 is extended or retracted to drive the corresponding piston rod to extend or retract, so that it can enter or push out the through pin shaft hole of the conductive pipe section 501 and the front conductive shaft section 102, so that the conductive pipe section 501 and the front conductive shaft section 102 can be pinned and fixed during normal operation, and rapid separation can be achieved when separation is required, and the moving contact 5 can be safely separated from the circuit breaker body 1 in conjunction with the retreat of the emergency retreat mechanism.

[0038] In any of the above solutions, preferably, an insulating coating is sprayed on the outer wall of the cylinder barrel of each of the vertical telescopic cylinders 9. The insulating coating can improve the insulation of the exterior of the vertical telescopic cylinder 9.

[0039] In any of the above solutions, preferably, an independent power supply 10 is fixedly installed on the upper part of the insulating protective shell 8, and the independent power supply 10 is used to supply power to the safety separation mechanism and the emergency retreat mechanism.

[0040] The independent power supply 10 is not affected by the power outage caused by the circuit breaker failure, and can ensure the safe fallback after the failure occurs.

[0041] In any of the above schemes, it is preferred that the trolley walking mechanism includes an inverted U-shaped wheel frame 11 fixedly mounted on the bottom of the circuit breaker body 1, a driving unit is arranged on the front side of the mounting cavity 16 of the inverted U-shaped wheel frame 11, and a driven unit is arranged on the rear side of the mounting cavity 16 of the inverted U-shaped wheel frame 11, and the driving unit is used to drive the driven unit to follow and operate synchronously therewith.

[0042] When the trolley travel mechanism is working, the driving unit drives the driven unit, thereby driving the entire circuit breaker body 1 to move forward and backward. The ground rail 3 can limit the movement in a straight line or backward during the entire movement process.

[0043] Embodiment 2: Compared with Embodiment 1, the difference of this embodiment is:

[0044] The driving unit includes a dual-axis output motor 12 fixedly installed in the installation cavity 16, and the motor shafts on both sides of the dual-axis output motor 12 are movably extended to both sides of the inverted U-shaped wheel frame 11 and are respectively connected to the driving wheels 13, and the bottom of the driving wheel 13 is installed in the track groove 301 of the ground rail 3. A driving pulley 14 is coaxially and integrally formed at the outer end of each driving wheel 13, and the two driving pulleys 14 are respectively connected to the corresponding parts on the driven unit on the rear side through a toothed belt 15.

[0045] In any of the above schemes, it is preferred that the driven unit includes a driven wheel shaft 17 horizontally arranged in a mounting cavity 16 directly behind the dual-axis output motor 12, both ends of the driven wheel shaft 17 are movably extended to both sides of the inverted U-shaped wheel frame 11 and are respectively connected to driven wheels 18, the bottom of the driven wheel 18 is mounted in the rail groove 301 of the ground rail 3, and a driven pulley 19 is coaxially integrally formed at the outer end of each driven wheel 18, and the two driven pulleys 19 are respectively connected to the driving pulley 14 on the front side through a toothed belt 15.

[0046] The driving unit is an active component. When the dual-axis output motor 12 is working, it starts the corresponding driving wheel 13 under the driving action of the motors on both sides of the dual-axis output motor 12, and at the same time drives the driving pulley 14 fixed to the driving wheel 13 to operate. When the driving pulley 14 operates, it relies on the action of the matching toothed belt 15 to link the corresponding driven pulley 19 on the driven unit to operate. The operation of the driven pulley 19 drives the driven wheel 18 to operate, and finally drives the entire circuit breaker to move forward or backward.

[0047] Specific working principle: the high-voltage distribution cabinet circuit breaker trolley assembly is connected with the high-voltage distribution cabinet 2. When the circuit breaker body 1 is working, it continuously approaches the high-voltage distribution cabinet 2 under the action of the trolley walking mechanism, and after it is in place, the moving contact unit and the static contact terminal 4 are matched and plugged in to achieve conduction. The locking position of the trolley walking mechanism can ensure the stability of the connection between the moving contact unit and the static contact terminal 4 during normal operation.

[0048] When a circuit fault causes the trolley's traveling mechanism to malfunction and fail to start or become locked, the piston rod of the emergency retraction mechanism is pushed forward to press against the high-voltage distribution cabinet 2. Since the high-voltage distribution cabinet 2 is in a fixed installation state connected to the ground, it remains stationary. Therefore, the entire circuit breaker body 1 is forced to move backward under the action of the reaction force, thereby being forced to complete the retraction and separation of the moving contact unit, thereby achieving the purpose of safe separation.

[0049] When working, the trolley assembly of the circuit breaker can move to one side of the high-voltage distribution cabinet 2 as needed. After moving into place, the closing and conduction are realized by relying on the cooperation between each moving contact unit and the corresponding static contact terminal 4. At the same time, when separation is required, the moving contact unit and the static contact terminal 4 are quickly separated by controlling the retreat of the trolley walking mechanism. When a safety fault occurs, the moving contact unit and the static contact terminal 4 cannot be separated due to a fault in the circuit breaker trolley walking mechanism. An emergency retreat mechanism is provided to provide auxiliary retreat force to ensure the safety of the entire circuit breaker body 1 retreating backward. In addition, a safety separation mechanism corresponding to each moving contact unit is added, which can quickly control the safety separation mechanism to realize that the moving contact 5 on the circuit breaker body 1 can be quickly separated from the circuit breaker body 1, thereby achieving the purpose of disconnecting the conductive connection between the circuit breaker body 1 and the high-voltage distribution cabinet 2, forming a double insurance.

[0050] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model. For technicians in this technical field, any replacement improvements or changes made to the implementation methods of the utility model fall within the protection scope of the utility model.

[0051] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A high-voltage distribution cabinet circuit breaker trolley assembly, comprising a circuit breaker body, the circuit breaker body being mounted above a ground rail at the rear side of the high-voltage distribution cabinet, the bottom of the ground rail being fixed on the ground, and two static contact terminals being mounted at the rear side of the high-voltage distribution cabinet, characterized in that: A trolley travel mechanism is arranged at the bottom of the circuit breaker body, and the bottom of the trolley travel mechanism is mounted in the track groove of the ground rail. Moving contact units are arranged from top to bottom on the front side of the circuit breaker body, and the moving contact units are used to be plugged and conductively matched with the static contact terminals at corresponding positions. An emergency retraction mechanism is installed in the middle of the front side wall of the circuit breaker body between the two moving contact units, and the emergency retraction mechanism is used to achieve safe separation of the moving contact unit from the static contact terminals.

2. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 1 is characterized in that: Safety separation mechanisms are symmetrically arranged on the upper and lower parts of the emergency retreat mechanism.

3. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 2 is characterized in that: The moving contact unit includes a moving contact fixedly mounted on the front side of the circuit breaker body. The moving contact is inserted into the static contact terminal at the corresponding position and is conductively connected in the working state. The conductive pipe section at the rear end of the moving contact is sleeved on the front end conductive shaft of the contact arm on the front side wall of the circuit breaker body and is pin-connected and fixed in the radial direction.

4. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 3 is characterized in that: The emergency retraction mechanism includes a horizontal push electric cylinder fixedly installed in the middle of the front side wall of the circuit breaker body, an insulating push plate is fixedly installed at the front end of the piston rod of the horizontal push electric cylinder, an insulating protective shell is provided on the outer cover of the horizontal push electric cylinder, the rear end of the insulating protective shell is fixed on the front side wall of the circuit breaker body, and the insurance separation mechanism is fixedly installed on the upper and lower parts of the insulating protective shell respectively, and when the moving contact unit cooperates with the corresponding static contact terminal, the front end of the insulating push plate abuts against the rear side of the high-voltage distribution cabinet.

5. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 4 is characterized in that: The safety separation mechanism includes a vertical telescopic cylinder fixedly mounted on the corresponding side wall of the insulating protective shell, the end of the piston rod of the vertical telescopic cylinder extends into the through pin shaft hole of the conductive pipe section and the front end conductive shaft section and connects and fixes the two along their radial direction with pins.

6. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 5, characterized in that: An insulating coating is sprayed on the outer side wall of the cylinder barrel of each vertical telescopic cylinder.

7. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 6, characterized in that: An independent power supply is fixedly installed on the upper part of the insulating protective shell, and the independent power supply is used to supply power to the insurance separation mechanism and the emergency retreat mechanism.

8. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 7, characterized in that: The trolley travel mechanism comprises an inverted U-shaped wheel frame fixedly mounted on the bottom of the circuit breaker body, a driving unit is arranged on the front side of the mounting cavity of the inverted U-shaped wheel frame, and a driven unit is arranged on the rear side of the mounting cavity of the inverted U-shaped wheel frame, and the driving unit is used to drive the driven unit to follow and operate synchronously therewith.

9. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 8, characterized in that: The driving unit includes a dual-axis output motor fixedly installed in the installation cavity, the motor shafts on both sides of the dual-axis output motor are movably extended to both sides of the inverted U-shaped wheel frame and are respectively connected to the driving wheels, the bottom of the driving wheel is cooperatively installed in the track groove of the ground rail, and a driving pulley is coaxially integrally formed at the outer end of each driving wheel, and the two driving pulleys are respectively connected to the corresponding parts on the driven unit on the rear side through toothed belts.

10. The high-voltage distribution cabinet circuit breaker trolley assembly according to claim 9, characterized in that: The driven unit includes a driven wheel shaft horizontally arranged in a mounting cavity directly behind the dual-axis output motor, both ends of the driven wheel shaft are movably extended to both sides of the inverted U-shaped wheel frame and are respectively connected to the driven wheels, the bottom of the driven wheel is cooperatively mounted in the track groove of the ground rail, and a driven pulley is coaxially integrally formed at the outer end of each driven wheel, and the two driven pulleys are respectively connected to the driving pulley on the front side thereof through a toothed belt.

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