Improved structure of busbar

Abstract

The utility model discloses an improved structure of a busbar, which comprises a busbar main body and a plurality of insertion sheets, each insertion sheet is fastened with a circuit breaker through a screw to realize conductive connection, and the busbar main body is provided with a plurality of internal threaded holes which are distributed at intervals; the upper end of each insertion piece is provided with an adjusting hole, and a first bolt penetrates through the adjusting hole of the insertion piece and then is spirally fixed with the internal threaded hole, so that the busbar body and the insertion pieces are tightly fixed together, and electrical conductive connection is formed. When a certain circuit breaker is detected to be damaged, the damaged circuit breaker can be detached and replaced by a new circuit breaker only by unscrewing the first screw fixed on the insertion piece corresponding to the damaged circuit breaker and the first bolt on the insertion piece and pulling the insertion piece to slide upwards relative to the first bolt, so that the insertion piece is separated from the damaged circuit breaker. And the first bolts of other insertion pieces do not need to be loosened, and other insertion pieces do not need to be disassembled relative to other undamaged circuit breakers, so that the working procedures can be reduced, the operation is simpler and more convenient, and the efficiency is higher.

Description

Improved bus structure Technical Fields

[0001] This utility model relates to the field of power technology, and specifically to an improved structure of a busbar. Background Technology:

[0002] A circuit breaker is a switching device that can disconnect and connect load circuits, as well as disconnect faulty circuits, and prevent accidents from escalating while ensuring safe operation. Among circuit breakers, miniature circuit breakers are the most widely used. These miniature circuit breakers are applicable to various places such as industrial, commercial, high-rise, and residential buildings. Miniature circuit breakers are also one of the important power distribution electrical appliances in low-voltage power grid systems.

[0003] All outgoing lines in the distribution cabinet must be connected to circuit breakers before being led out. Multiple circuit breakers are typically installed horizontally side-by-side within the cabinet. Currently, the common technique is to directly connect each circuit breaker to the next using wires, and so on, until all circuit breakers are energized. However, this method is prone to misconnections and omissions, leading to short circuits or open circuits. Subsequently, circuit breaker busbars were developed, allowing multiple circuit breakers to be connected using a single busbar. Busbars offer advantages such as easy installation and good safety performance, and are therefore widely used.

[0004] Chinese utility model patent application number 202322972171.8 discloses an integrally molded electrical bus, including: a bus body, the bus body including a support plate, a plurality of inserts fixed on the support plate, and a plurality of grooves cut on the inserts to increase the insertion and extraction force between the device and the electrical switch, thereby reducing the probability of the device falling off and improving the safety of the device.

[0005] Chinese utility model patent application number 202420345871.6 discloses a busbar, which has a flame-retardant shell with two sliding grooves cut into the middle by a barrier section. After the first busbar and the second busbar are respectively assembled into the two sliding grooves, the terminals on the first busbar and the second busbar are exposed outside the flame-retardant shell, which facilitates wiring. There are two types of terminals: one is straight and the other is S-shaped. After the two types of terminals are staggered in the sliding grooves, the wiring positions at the ends will be on the same axis; the wiring is neat and beautiful.

[0006] Both types of busbars have the following drawbacks: Since the connectors / terminals of both busbars are integrally connected to the busbar body / busbar, and the busbar is connected to multiple circuit breakers arranged in a row via multiple connectors / terminals, and each is screwed in to achieve corresponding conduction; if a circuit breaker fails and needs replacement, because multiple circuit breakers are installed on the distribution cabinet's mounting rail using a clamping method, it is impossible to directly remove a damaged circuit breaker without disassembling the busbar. In this case, all the screws securing the busbar to the connectors / terminals on all circuit breakers must be loosened, and then the busbar must be removed relative to all circuit breakers before the damaged circuit breaker can be removed from the distribution cabinet's mounting rail. A new circuit breaker must then be installed on the mounting rail, and the busbar must be reinstalled on all circuit breakers, and all screws tightened to complete the repair. This entire process is extremely cumbersome and causes significant inconvenience to maintenance personnel.

[0007] In view of the above, the inventors propose the following technical solution. Invention content and utility model content:

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide an improved structure for a busbar.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The improved structure of the busbar includes a busbar body and a number of inserts spaced apart at the lower end of the busbar body and electrically connected to the busbar body. Each insert is fastened to a circuit breaker by screws to achieve conductive connection, so that the busbar body is electrically connected to multiple circuit breakers. The busbar body is provided with a number of spaced internal threaded holes. Each insert has vertically distributed adjustment holes at its upper end that correspond to the internal threaded holes. A first bolt passes through the adjustment hole of the insert and is screwed into the internal threaded hole to fix the busbar body and the insert together and form an electrical conductive connection. When the first bolt is loosened relative to the internal threaded hole, the insert can slide up and down relative to the first bolt through the adjustment hole.

[0010] Furthermore, in the above technical solution, the busbar body is formed by stamping and extending backward along its front end to form a plurality of spaced threaded cylinders, the threaded cylinders having the aforementioned internal threaded holes.

[0011] Furthermore, in the above technical solution, a first elastic washer is also fitted on the first bolt. One surface of the first elastic washer is in contact with the surface of the insert, and the other surface of the first elastic washer is in contact with the inner side of the head of the first bolt. The first elastic washer is in a compressed state.

[0012] Furthermore, in the above technical solution, the first elastic pad is a twisted disc-shaped pad.

[0013] Furthermore, in the above technical solution, the guide portion at the lower end of the insert is also provided with a limiting groove.

[0014] Furthermore, in the above technical solution, one end of the busbar body is also fixed with a guide arm for connecting to the main switch.

[0015] Furthermore, in the above technical solution, an insulator is also provided on the outside of the conductor arm.

[0016] After adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: In specific use, this utility model inserts multiple plugs electrically connected to the main body of the busbar into multiple circuit breakers and secures them with the first screw, so that the entire busbar and multiple circuit breakers are electrically connected. These circuit breakers are all installed on the mounting rail of the distribution cabinet by means of a clamp. When a circuit breaker is detected to be damaged and needs to be replaced, it is only necessary to loosen the first screw fixing the plug corresponding to the damaged circuit breaker and loosen the first bolt on the plug. The plug can be pulled to slide upward relative to the first bolt through the adjustment hole, so that the plug can be detached from the damaged circuit breaker. At this time, the damaged circuit breaker is not restricted by the plug, so that the damaged circuit breaker can be quickly removed to replace the new circuit breaker. It is not necessary to loosen the first bolt of other plugs or remove other plugs relative to other undamaged circuit breakers. It can reduce the process, is extremely convenient to operate, and has extremely high maintenance efficiency, making this utility model highly competitive in the market. Figure description:

[0017] Figure 1 is a perspective view of this utility model;

[0018] Figure 2 is a perspective view of the main body of the busbar in this utility model;

[0019] Figure 3 is an exploded perspective view of this utility model;

[0020] Figure 4 is a diagram showing the usage state of this utility model;

[0021] Figure 5 is a cross-sectional view of this utility model;

[0022] Figure 6 is a perspective view of the connecting arm with an insulator in this utility model. Detailed implementation method:

[0023] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0024] As shown in Figures 1-6, an improved busbar structure is presented, comprising a busbar body 1 and several inserts 2 spaced apart at the lower end of the busbar body 1 and electrically connected to the busbar body. Each insert 2 is fastened to a circuit breaker 200 by screws to achieve conductive connection, so that the busbar body 1 is electrically connected to multiple circuit breakers 200. In actual use, the busbar body 1 is electrically connected to the main switch 100, and the conductive part of the insert 2 is inserted into the circuit breaker 200. The first screw is screwed through the circuit breaker 200 and contacts the conductive part of the insert 2 to form electrical conduction.

[0025] This utility model makes the busbar body 1 and the insert 2 into a separate structure. The two are independent entities, but are connected together by assembly to form an electrical connection. The specific assembly structure is as follows: the busbar body 1 is provided with a number of spaced internal threaded holes 111; each insert 2 is provided with vertically distributed adjustment holes 21 corresponding to the internal threaded holes 111 at its upper end; the first bolt 22 passes through the adjustment hole 21 of the insert 2 and is screwed to the internal threaded hole 111 to tightly fix the busbar body 1 and the insert 2 together and form an electrical connection; when the first bolt 22 is loosened relative to the internal threaded hole 111, the insert 2 can slide up and down relative to the first bolt 22 through the adjustment hole 21. In practical use, this utility model uses multiple plugs 2 electrically connected to the busbar body 1 to be inserted into multiple circuit breakers 200 and secured with first screws, so that the entire busbar and multiple circuit breakers 200 are electrically connected. These circuit breakers are all installed on the mounting rail of the distribution cabinet by means of clamps. When a circuit breaker is detected to be damaged and needs to be replaced, it is only necessary to loosen the first screw that fixes the plug 2 corresponding to the damaged circuit breaker, loosen the first bolt 22 on the plug 2, and pull the plug 2 to slide upward relative to the first bolt 22 through the adjustment hole 21, so that the plug 2 is detached from the damaged circuit breaker. At this time, the damaged circuit breaker is not restricted by the plug 2, so the damaged circuit breaker can be quickly removed to replace the new circuit breaker, without having to loosen the first bolts of other plugs 2 or remove other plugs 2 relative to other undamaged circuit breakers. It can reduce the number of procedures, is extremely convenient to operate, and has extremely high maintenance efficiency, making this utility model highly competitive in the market.

[0026] In some embodiments, in order to improve the structural strength and stability of the busbar body 1 and the first bolt 22 in a spiral installation, the following design is also made: the busbar body 1 is formed by stamping and extending backward along its front end to form a plurality of spaced threaded cylinders 11, the threaded cylinders 11 having the aforementioned internal threaded holes 111, so that the axial distance of the internal threaded holes 111 is large enough, so that the internal threaded holes 111 and the first bolt 22 can form a more stable threaded connection, making the assembly of the busbar body 1 and the first bolt 22 more stable.

[0027] To improve the stability of the assembly structure between the insert 2 and the busbar body 1, and to enhance conductivity, the following design is implemented: a first elastic washer 24 is fitted onto the first bolt 22. One surface of the first elastic washer 24 contacts the surface of the insert 2, and the other surface of the first elastic washer 24 contacts the inner side of the head of the first bolt 22. The first elastic washer 24 is in a compressed state. The compressed state of the first elastic washer 24 increases the elastic force, making the contact between the first bolt 22 and the insert 2 tighter, thereby making the assembly structure between the insert 2 and the busbar body 1 more stable. The first elastic washer 24 is a twisted disc-shaped washer.

[0028] In some embodiments, the size of the first elastic washer 24 is larger than the size of the head of the first bolt 22, thereby increasing the contact area and making the head of the first bolt 22 more stably contact the insert 2 through the first elastic washer 24, thereby improving the overall assembly structure of the busbar to be more stable.

[0029] In some embodiments, the guide portion at the lower end of the insert 2 is further provided with a limiting groove, which is adapted to the first screw screw that is screwed on the circuit breaker 200. That is, after the first screw is tightened, the end of the first screw presses against the limiting groove, thereby preventing the insert 2 from accidentally coming off the circuit breaker 200 and ensuring the stability of the power supply.

[0030] One end of the busbar body 1 is also fixed with a guide arm 4 for connecting to the main switch 100. The guide arm 4 is also provided with an insulator 41 to improve safety. Both ends of the guide arm 4 extend outside the insulator 41.

[0031] In summary, in practical use, this utility model uses multiple plugs 2 electrically connected to the busbar body 1 to be inserted into multiple circuit breakers 200 and secured with first screws, so that the entire busbar and multiple circuit breakers 200 are electrically connected. These circuit breakers are all installed on the mounting rail of the distribution cabinet by means of clamps. When a circuit breaker is detected to be damaged and needs to be replaced, it is only necessary to loosen the first screw fixed to the plug 2 corresponding to the damaged circuit breaker and loosen the first bolt 22 on the plug 2, and pull the plug 2 to slide upward relative to the first bolt 22 through the adjustment hole 21, so that the plug 2 is detached from the damaged circuit breaker. At this time, the damaged circuit breaker is not restricted by the plug 2, so the damaged circuit breaker can be quickly removed to replace the new circuit breaker, without having to loosen the first bolts of other plugs 2 or remove other plugs 2 relative to other undamaged circuit breakers. It can reduce the number of procedures, is extremely convenient to operate, and has extremely high maintenance efficiency, making this utility model highly competitive in the market.

[0032] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. An improved structure of a busbar, comprising a busbar body (1) and a plurality of inserts (2) spaced apart at the lower end of the busbar body (1) and electrically connected to the busbar body, each insert (2) being fastened to a circuit breaker (200) by screws to achieve conductive connection, so that the busbar body (1) is electrically connected to multiple circuit breakers (200), characterized in that: The busbar body (1) is provided with a number of spaced internal threaded holes (111); each insert (2) is provided with vertically distributed adjustment holes (21) corresponding to the internal threaded holes (111) at its upper end. The first bolt (22) passes through the adjustment hole (21) of the insert (2) and is screwed to the internal threaded hole (111) to tightly fix the busbar body (1) and the insert (2) together and form an electrical connection; when the first bolt (22) is loosened relative to the internal threaded hole (111), the insert (2) can slide up and down relative to the first bolt (22) through the adjustment hole (21).

2. The improved bus structure according to claim 1, characterized in that: The busbar body (1) is formed by stamping and extending backward along its front end to form a plurality of spaced threaded cylinders (11), the threaded cylinders (11) having the aforementioned internal threaded holes (111).

3. The improved bus structure according to claim 2, characterized in that: The first bolt (22) is also fitted with a first elastic washer (24), one surface of which is in contact with the surface of the insert (2), and the other surface of which is in contact with the inner side of the head of the first bolt (22), and the first elastic washer (24) is in a compressed state.

4. The improved bus structure according to claim 3, characterized in that: The first elastic pad (24) is a twisted disc-shaped pad.

5. The improved bus structure according to any one of claims 1-4, characterized in that: The guide portion at the lower end of the insert (2) is also provided with a limiting groove.

6. The improved bus structure according to any one of claims 1-4, characterized in that: One end of the busbar body (1) is also fixed with a guide arm (4) for connecting to the main switch (100).

7. The improved bus structure according to claim 6, characterized in that: The conductor arm (4) is also provided with an insulator (41) on the outside.

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