A closed combined low voltage bus system

Abstract

The application relates to the technical field of busbars, in particular to a closed combined low-voltage busbar system which is installed in an outer shell and comprises a busbar and a circuit breaker; a No. 1 mounting plate and a No. 2 mounting plate, the No. 1 mounting plate is slidingly arranged on a plurality of No. 1 horizontal shafts fixed in the outer shell, and the No. 1 mounting plate is connected with an elastic structure arranged on the No. 2 mounting plate; a pushing mechanism, the pushing mechanism comprises a bidirectional pulling assembly and a top-stretching assembly which are arranged in linkage, the bidirectional driving assembly can drive the No. 1 mounting plate to move along the length direction of the No. 1 horizontal shaft, and when the No. 1 mounting plate moves along the length direction of the No. 1 horizontal shaft, the top-stretching assembly can drive the No. 2 mounting plate to move relative to the No. 1 mounting plate; a side plate, the side plate is connected with a convex shaft arranged on the circuit breaker; an elastic deflection assembly, the elastic deflection assembly is rotatably arranged on the side plate, the elastic deflection assembly is matched with another convex shaft arranged on the circuit breaker, and the elastic deflection assembly can fix the circuit breaker on the base, so that the use safety of the busbar system is improved.

Description

Technical Field

[0001] This invention relates to the field of busbar technology, specifically a closed-loop combined low-voltage busbar system. Background Technology

[0002] A closed low-voltage busbar system involves directly attaching components to the busbars without the need for drilling. The busbars serve as both the electrical connection and support for the components.

[0003] During the use of low-voltage busbar systems, it is necessary to regularly inspect the components within the busbar system. Traditional busbar systems are installed inside cabinets, and during inspections, poor lighting conditions can easily lead to poor visibility, making it difficult for maintenance personnel to detect problems in a timely manner. Furthermore, if damaged components are located in specific areas, maintenance personnel need to perform blind operation while the power is on, which is highly dangerous and detrimental to the stable and orderly operation of power supply. Summary of the Invention

[0004] The purpose of this invention is to provide a closed-loop combined low-voltage busbar system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An enclosed combined low-voltage busbar system, installed within an enclosure, includes busbars and circuit breakers;

[0007] Mounting plate No. 1 and mounting plate No. 2 are arranged in parallel. Mounting plate No. 1 is slidably mounted on multiple horizontal axes fixed in the outer shell. Mounting plate No. 1 is connected to an elastic structure mounted on mounting plate No. 2.

[0008] A pushing mechanism is disposed within the housing and connected to the first mounting plate and the second mounting plate. The pushing mechanism includes a bidirectional pulling component and a top extension component that are linked together. The bidirectional driving component can drive the first mounting plate to move along the length direction of the first horizontal axis. When the first mounting plate moves along the length direction of the first horizontal axis, the top extension component can drive the second mounting plate to move relative to the first mounting plate.

[0009] Side plates are symmetrically arranged on the base connecting the busbar, and the side plates are connected to the convex shaft provided on the circuit breaker;

[0010] An elastic swing assembly is rotatably mounted on the side plate. The elastic swing assembly cooperates with another convex shaft provided on the circuit breaker to fix the circuit breaker on the base.

[0011] As a further aspect of the present invention: the bidirectional drive assembly includes two drive wheels rotatably mounted inside the housing, a drive belt is sleeved between the two drive wheels, and the shaft of one of the drive wheels passes through the housing and is connected to a knob;

[0012] The bidirectional drive assembly also includes two connectors that are diagonally fixed on the transmission belt. A pull rod is rotatably mounted on the connector, and the end of the pull rod away from the connector is rotatably connected to the first mounting plate.

[0013] As a further embodiment of the present invention: the elastic structure includes a plurality of second horizontal shafts fixedly installed on the second mounting plate, the second horizontal shafts being slidably disposed through the first mounting plate, and a limit ring being fixed at the end of the second horizontal shaft away from the second mounting plate;

[0014] A first spring is also fitted on the second horizontal shaft. One end of the first spring is connected to the first mounting plate, and the other end of the first spring is connected to the limiting ring.

[0015] As a further embodiment of the present invention: the top extension assembly includes a pulley rotatably connected to the second mounting plate and passing through the first mounting plate, the pulley being in rolling cooperation with a cam rotatably mounted on the first mounting plate;

[0016] The extension assembly also includes a meshing structure connected to the cam.

[0017] As a further embodiment of the present invention: the meshing structure includes a gear rotatably mounted on the first mounting plate and a rack plate fixedly mounted on the inner wall of the outer casing, wherein the gear meshes with the rack plate;

[0018] The gear shaft is connected to the cam shaft via a belt.

[0019] As a further embodiment of the present invention: the side plate is provided with a first arc groove and a second arc groove, the center of the second arc groove is located at the end of the first arc groove, so that after one of the convex shafts is placed at the end of the first arc groove, the distance between the two convex shafts is equal to the circumferential radius of the second arc groove.

[0020] As a further embodiment of the present invention: the elastic oscillation assembly includes a deflector rotatably mounted on the side plate, the deflector having a hysteresis groove along its length, an abutment being slidably mounted in the hysteresis groove, and the abutment being connected to the deflector through an energy storage structure.

[0021] A sliding groove is provided on the side of the hysteresis groove, and the protrusions symmetrically arranged on both sides of the abutment can slide in the sliding groove.

[0022] The elastic yaw assembly also includes a reset structure connected to the deflector.

[0023] As a further embodiment of the present invention: the energy storage structure includes a telescopic rod that is fixedly connected to the abutment and passes through the deflector, and a second spring is sleeved on the telescopic rod. One end of the second spring is connected to the abutment, and the other end is connected to the side wall of the slide groove.

[0024] As a further embodiment of the present invention: the reset structure includes a connecting rod fixedly connected to the deflector, and a counterweight is fixed to one end of the connecting rod away from its rotation center.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] The designed pushing mechanism allows the No. 1 mounting plate to move to the opening of the housing when the knob is rotated. At this position, the No. 1 mounting plate is in a better position with better lighting, which is more conducive to the observation of maintenance personnel. At the same time, it avoids the need for maintenance personnel to reach into the housing for blind operation when replacing parts inside the housing, thereby reducing the risk of contact accidents. In addition, when the No. 1 mounting plate moves, the No. 2 mounting plate can move away from the No. 1 mounting plate, so that the busbar and circuit breaker are away from the No. 1 mounting plate. This ensures that when the circuit breaker is repaired or replaced, the maintenance personnel's hands are away from the control switches on the No. 1 mounting plate, preventing the maintenance personnel from accidentally touching the control switches on the No. 1 mounting plate when performing maintenance tasks. This improves the stability of the operation of the control switches inside the housing and improves the power supply stability of the entire busbar system.

[0027] The flexible swing component enables rapid installation and removal of circuit breakers, shortening the construction cycle and reducing economic and property losses caused by power outages. At the same time, the more convenient installation process greatly reduces the operational difficulty for maintenance personnel and also reduces the risks they face during maintenance work. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of one embodiment of a closed-loop combined low-voltage busbar system.

[0029] Figure 2 This is a schematic diagram of the structure of the rear of mounting plate No. 1 in one embodiment of a closed-type combined low-voltage busbar system.

[0030] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0031] Figure 4 This is a schematic diagram of the connection structure between the circuit breaker and the second mounting plate in one embodiment of a closed-type combined low-voltage busbar system.

[0032] Figure 5 for Figure 4 Enlarged view of the structure at point B in the middle.

[0033] Figure 6 This is an exploded view of the side plate and the elastic oscillation assembly in one embodiment of a closed-type combined low-voltage busbar system.

[0034] Figure 7 This is a schematic diagram of the structure of an elastic oscillation component in one embodiment of a closed-loop combined low-voltage busbar system.

[0035] In the diagram: 1. Outer shell; 2. Knob; 3. Drive wheel; 4. Drive belt; 5. Connector; 6. Pull rod; 7. Mounting plate 1; 8. Horizontal shaft 1; 9. Mounting plate 2; 10. Horizontal shaft 2; 11. Spring 1; 12. Pulley; 13. Cam; 14. Belt; 15. Gear; 16. Rack plate; 17. Busbar; 18. Circuit breaker; 19. Side plate; 1901. Arc groove 1; 1902. Arc groove 2; 20. Cam shaft; 21. Deflector; 2101. Slide groove; 2102. Hysteresis groove; 22. Abutment; 2201. Protrusion; 23. Telescopic rod; 24. Spring 2; 25. Connecting rod; 2501. Counterweight. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0038] Please see Figures 1 to 7In this embodiment of the invention, a closed-type combined low-voltage busbar system is installed inside a housing 1, including a busbar 17, a circuit breaker 18, a first mounting plate 7, a second mounting plate 9, a pushing mechanism, a side plate 19, and an elastic swing assembly. This allows the first mounting plate 7 to move to the opening of the housing 1 when the knob 2 is rotated. At this point, the first mounting plate 7 is positioned in a location with better lighting, making it easier for maintenance personnel to observe. This also avoids the need for maintenance personnel to blindly insert their hands into the housing 1 when replacing components, thus reducing the risk of contact injuries. Furthermore, when the first mounting plate 7 moves, the second mounting plate 9 can move away from the first mounting plate. The movement of component 7 moves busbar 17 and circuit breaker 18 away from mounting plate 7, ensuring that maintenance personnel can keep their hands away from the control switches on mounting plate 7 when repairing or replacing circuit breaker 18. This prevents maintenance personnel from accidentally touching the control switches on mounting plate 7 during maintenance, improves the stability of the control switches inside the housing 1, and enhances the power supply stability of the entire busbar system. Simultaneously, it allows for rapid installation and removal of circuit breaker 18, shortening the construction cycle and reducing economic and property losses caused by power outages. Furthermore, the more convenient installation process significantly reduces the operational difficulty for maintenance personnel and lowers the risks associated with maintenance work.

[0039] Mounting plate 7 and mounting plate 9 are arranged in parallel. Mounting plate 7 is slidably mounted on a plurality of horizontal shafts 8 fixed inside the outer shell 1. Mounting plate 7 is connected to an elastic structure on mounting plate 9. The elastic structure includes a plurality of horizontal shafts 10 fixedly mounted on mounting plate 9. The horizontal shafts 10 slide through mounting plate 7. A limit ring is fixed at one end of the horizontal shaft 10 away from mounting plate 9. A spring 11 is also sleeved on the horizontal shaft 10. One end of the spring 11 is connected to mounting plate 7, and the other end of the spring 11 is connected to the limit ring.

[0040] The pushing mechanism is disposed inside the outer shell 1 and connected to the first mounting plate 7 and the second mounting plate 9. The pushing mechanism includes a bidirectional pulling component and a top extension component that are linked together. The bidirectional driving component can drive the first mounting plate 7 to move along the length direction of the first horizontal axis 8. When the first mounting plate 7 moves along the length direction of the first horizontal axis 8, the top extension component can drive the second mounting plate 9 to move relative to the first mounting plate 7.

[0041] The bidirectional drive assembly includes two drive wheels 3 rotatably mounted inside the outer casing 1, a drive belt 4 is sleeved between the two drive wheels 3, and the shaft of one of the drive wheels 3 passes through the outer casing 1 and is connected to a knob 2.

[0042] The bidirectional drive assembly also includes two connectors 5 that are fixedly mounted diagonally on the transmission belt 4. A pull rod 6 is rotatably mounted on the connector 5, and the end of the pull rod 6 away from the connector 5 is rotatably connected to the first mounting plate 7.

[0043] The top extension assembly includes a pulley 12 that is rotatably connected to the second mounting plate 9 and passes through the first mounting plate 7. The pulley 12 is in rolling engagement with a cam 13 that is rotatably mounted on the first mounting plate 7.

[0044] The top extension assembly also includes a meshing structure connected to the cam 13. The meshing structure includes a gear 15 rotatably mounted on the first mounting plate 7 and a rack plate 16 fixedly mounted on the inner wall of the outer casing 1. The gear 15 meshes with the rack plate 16.

[0045] The shaft of the gear 15 is connected to the shaft of the cam 13 via a belt 14.

[0046] In use, the outer casing 1 is equipped with a cover plate (not shown in the figure). When the busbar system needs maintenance, the cover plate can be removed first, and then the knob 2 can be rotated. When the knob 2 is rotated, it can drive the transmission wheel 3, which is coaxially connected to it, to rotate. This drives the transmission belt 4, which is sleeved between the two transmission wheels 3, to move. The transmission belt 4 has a double-layer structure, and from a planar perspective, the two layers of the transmission belt 4 move in opposite directions. Two connecting pieces 5 are respectively installed between the two layers of the transmission belt 4, which allows the transmission belt 4 to drive the transmission belt 4 to move in opposite directions. The two connecting parts 5 move closer to each other or further apart. When the two connecting parts 5 move closer to each other, they will drive the first mounting plate 7 to move along the length of the first horizontal axis 8 toward the outside of the outer casing 1 via the pull rod 6. This will move the first mounting plate 7 to the opening of the outer casing 1. At this time, the position of the first mounting plate 7 will have better lighting, which will be more conducive to the observation of maintenance personnel. At the same time, it will avoid the need for maintenance personnel to put their hands into the outer casing 1 for blind operation when replacing parts inside the outer casing 1, thereby reducing the risk of contact for maintenance personnel.

[0047] In the initial state, the long shaft of cam 13 is separated from pulley 12. At this time, spring 11 is compressed, causing mounting plate 9 to be tightly attached to mounting plate 7. This makes the structure of mounting plate 7 and mounting plate 9 more compact within the outer casing 1. As mounting plate 7 moves toward the opening of the outer casing 1, gear 15 follows it. Gear 15 is engaged with rack plate 16, causing it to rotate. This rotation drives the cam via belt 14. Rotating wheel 13 causes the long axis of cam 13 to move toward pulley 12, lifting pulley 12 outward. This causes mounting plate 9 to move away from mounting plate 7, moving busbar 17 and circuit breaker 18 away from mounting plate 7. This ensures that when repairing or replacing circuit breaker 18, maintenance personnel can keep their hands away from the control switch on mounting plate 7, preventing accidental contact with the control switch. This improves the stability of the control switch operation inside the housing 1 and enhances the power supply stability of the entire busbar system.

[0048] With the above-mentioned configuration, when the knob 2 is rotated, the first mounting plate 7 can move to the opening of the housing 1. At this time, the position of the first mounting plate 7 is in a better position with better lighting, which is more conducive to the observation of maintenance personnel. At the same time, it avoids the need for maintenance personnel to reach into the housing 1 for blind operation when replacing parts inside the housing 1, thereby reducing the risk of contact accidents. Meanwhile, when the first mounting plate 7 moves, the second mounting plate 9 can move away from the first mounting plate 7, so that the busbar 17 and the circuit breaker 18 are away from the first mounting plate 7. This ensures that when the circuit breaker 18 is being repaired or replaced, the maintenance personnel's hands can be kept away from the control switch on the first mounting plate 7, avoiding accidental contact with the control switch on the first mounting plate 7 during maintenance tasks. This improves the stability of the operation of the control switch inside the housing 1 and enhances the power supply stability of the entire busbar system.

[0049] It should be noted that the aforementioned knob 2 has a damping sleeve on its rotating shaft to increase the torque when the knob 2 rotates. This prevents the first mounting plate 7 and the second mounting plate 9 from resetting when the first mounting plate 7 moves to the opening of the outer casing 1 due to the action of the second spring 24 on the first mounting plate 7 and the second mounting plate 9. This improves the stability of the first mounting plate 7 and the second mounting plate 9 during maintenance.

[0050] Please see Figures 4-7The side plate 19 is symmetrically arranged on the base connecting the busbar 17. The side plate 19 is connected to the convex shaft 20 arranged on the circuit breaker 18. The side plate 19 is provided with a first arc groove 1901 and a second arc groove 1902. The center of the second arc groove 1902 is located at the end of the first arc groove 1901, so that after one of the convex shafts 20 is placed at the end of the first arc groove 1901, the distance between the two convex shafts 20 is equal to the circumferential radius of the second arc groove 1902.

[0051] The elastic swing assembly is rotatably mounted on the side plate 19. The elastic swing assembly cooperates with another convex shaft 20 provided on the circuit breaker 18, which can fix the circuit breaker 18 on the base.

[0052] The elastic oscillation assembly includes a deflector 21 rotatably mounted on the side plate 19. The deflector 21 has a hysteresis groove 2102 along its length. An abutment 22 is slidably mounted in the hysteresis groove 2102. The abutment 22 and the deflector 21 are connected by an energy storage structure. The energy storage structure includes a telescopic rod 23 fixedly connected to the abutment 22 and passing through the deflector 21. A second spring 24 is sleeved on the telescopic rod 23. One end of the second spring 24 is connected to the abutment 22, and the other end is connected to the side wall of the groove 2101.

[0053] The side of the hysteresis groove 2102 is provided with a sliding groove 2101, and the protrusions 2201 symmetrically arranged on both sides of the abutment 22 can slide in the sliding groove 2101.

[0054] The elastic oscillation assembly also includes a reset structure connected to the deflector 21. The reset structure includes a connecting rod 25 fixedly connected to the deflector 21, and a counterweight 2501 is fixed to one end of the connecting rod 25 away from its rotation center.

[0055] When installing the circuit breaker 18 onto the base, the convex shaft 20 connecting the lower part of the circuit breaker 18 can be inserted into the first arc-shaped groove 1901. When the convex shaft 20 enters the end of the first arc-shaped groove 1901, the circuit breaker 18 is rotated with the convex shaft 20, causing the other convex shaft 20 to make a circular motion. At this time, the deflector 21 is in a free state, so that under the action of the counterweight 2501 and the connecting rod 25, the deflector 21 is kept in an inclined state. At this time, the opening end of the hysteresis groove 2102 on the deflector 21 is on the circular trajectory of the convex shaft 20 making a circular motion. When the convex shaft 20 makes a circular motion, it can enter the hysteresis groove 2102 from the opening end of the hysteresis groove 2102 and abut against the abutment 22, and continue to rotate the circuit breaker. During the operation of circuit breaker 18, the convex shaft 20, which is making circular motion, will drive the deflector 21 to deflect. At the same time, it will compress the second spring 24 by acting on the abutment 22. When the line connecting the two convex shafts 20 coincides with the line connecting the convex shaft 20 and the end of the first arc groove 1901, the circuit breaker 18 will continue to rotate. At this time, the second spring 24 will release its elastic potential energy and push the convex shaft 20, which is making circular motion, towards the end of the second arc groove 1902. After the convex shaft 20 moves to the end of the second arc groove 1902, the abutment 22 still has a force acting on the convex shaft 20 under the action of the second spring 24, thus fixing the circuit breaker 18 between the two side plates 19 and completing the fixation of the circuit breaker 18.

[0056] Conversely, when disassembling the circuit breaker 18, the upper part of the circuit breaker 18 can be pulled forcefully to reverse the deflection element 21, thereby releasing the circuit breaker 18.

[0057] The above settings enable rapid installation and disassembly of circuit breaker 18, shortening the construction cycle and reducing economic and property losses caused by power outages. At the same time, the more convenient installation process greatly reduces the operational difficulty for maintenance personnel and also reduces the risks for maintenance personnel when performing maintenance work.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A closed-type combined low-voltage busbar system, installed within an enclosure (1), comprising a busbar (17) and a circuit breaker (18), characterized in that, Also includes: The first mounting plate (7) and the second mounting plate (9) are arranged in parallel. The first mounting plate (7) is slidably arranged on a plurality of first horizontal axes (8) fixed inside the outer shell (1), and the first mounting plate (7) is connected to an elastic structure arranged on the second mounting plate (9). A pushing mechanism is disposed inside the outer shell (1) and connected to the first mounting plate (7) and the second mounting plate (9). The pushing mechanism includes a bidirectional drive component and a top extension component that are linked together. The bidirectional drive component can drive the first mounting plate (7) to move along the length direction of the first horizontal axis (8). When the first mounting plate (7) moves along the length direction of the first horizontal axis (8), the top extension component can drive the second mounting plate (9) to move relative to the first mounting plate (7). Side plates (19) are symmetrically arranged on the base connecting the busbar (17), and the side plates (19) are connected to the convex shaft (20) arranged on the circuit breaker (18). An elastic swing assembly is rotatably mounted on the side plate (19). The elastic swing assembly cooperates with another convex shaft (20) provided on the circuit breaker (18) to fix the circuit breaker (18) on the base. The elastic yaw assembly includes a deflector (21) rotatably mounted on the side plate (19). The deflector (21) is provided with a hysteresis groove (2102) along its length. An abutment (22) is slidably mounted in the hysteresis groove (2102). The abutment (22) and the deflector (21) are connected by an energy storage structure. The side of the hysteresis groove (2102) is provided with a sliding groove (2101), and the protrusions (2201) symmetrically arranged on both sides of the abutment (22) can slide in the sliding groove (2101); The elastic yaw assembly also includes a reset structure connected to the deflector (21); The energy storage structure includes a telescopic rod (23) that is fixedly connected to the abutment (22) and passes through the deflector (21). A second spring (24) is sleeved on the telescopic rod (23). One end of the second spring (24) is connected to the abutment (22), and the other end is connected to the side wall of the slide (2101).

2. The enclosed combined low-voltage busbar system according to claim 1, characterized in that, The bidirectional drive assembly includes two drive wheels (3) rotatably mounted inside the outer casing (1), a drive belt (4) is sleeved between the two drive wheels (3), and the shaft of one of the drive wheels (3) passes through the outer casing (1) and is connected to a knob (2). The bidirectional drive assembly also includes two connectors (5) that are fixedly mounted diagonally on the transmission belt (4). A pull rod (6) is rotatably mounted on the connector (5). The end of the pull rod (6) away from the connector (5) is rotatably connected to the first mounting plate (7).

3. The enclosed combined low-voltage busbar system according to claim 1, characterized in that, The elastic structure includes a plurality of second horizontal shafts (10) fixedly installed on the second mounting plate (9). The second horizontal shafts (10) slide through the first mounting plate (7), and a limit ring is fixed at one end of the second horizontal shaft (10) away from the second mounting plate (9). A first spring (11) is also fitted on the second horizontal shaft (10). One end of the first spring (11) is connected to the first mounting plate (7), and the other end of the first spring (11) is connected to the limiting ring.

4. The enclosed combined low-voltage busbar system according to claim 1, characterized in that, The top extension assembly includes a pulley (12) rotatably connected to the second mounting plate (9) and passing through the first mounting plate (7), the pulley (12) being in rolling engagement with a cam (13) rotatably mounted on the first mounting plate (7); The top extension assembly also includes a meshing structure connected to the cam (13).

5. A closed-loop combined low-voltage busbar system according to claim 4, characterized in that, The meshing structure includes a gear (15) rotatably mounted on the first mounting plate (7) and a rack plate (16) fixedly mounted on the inner wall of the outer shell (1), wherein the gear (15) meshes with the rack plate (16); The shaft of the gear (15) is connected to the shaft of the cam (13) via a belt (14).

6. A closed-loop combined low-voltage busbar system according to claim 1, characterized in that, The side plate (19) is provided with a first arc groove (1901) and a second arc groove (1902). The center of the second arc groove (1902) is located at the end of the first arc groove (1901) so that after one of the convex shafts (20) is placed at the end of the first arc groove (1901), the distance between the two convex shafts (20) is equal to the circumferential radius of the second arc groove (1902).

7. A closed-loop combined low-voltage busbar system according to claim 1, characterized in that, The reset structure includes a connecting rod (25) fixedly connected to the deflector (21), and a counterweight (2501) is fixed at one end of the connecting rod (25) away from its rotation center.

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