Improved busbar

Abstract

The utility model discloses an improved busbar, which comprises a busbar main body and a plurality of insertion pieces, and a plurality of spaced external thread columns are fixed at the front end of the busbar main body; an adjusting hole is formed in the upper end of each inserting piece, and the inserting pieces are arranged on the external threaded columns in a sleeving mode through the adjusting holes. The nut is spirally mounted on the external thread column so as to fasten the insertion sheet at the front end of the busbar main body and conduct connection; when the nut is unscrewed relative to the external thread column, the insertion piece can slide up and down relative to the external thread column through the adjusting hole. 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 simple and convenient, and the efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of power technology, and specifically to an improved 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. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an improved busbar.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The improved 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. A number of spaced external threaded posts are fixed at the front end of the busbar body. Each insert has a vertically distributed adjustment hole at its upper end, and the insert is sleeved on the external threaded post through the adjustment hole. A nut is screwed onto the external threaded post to fasten the insert to the front end of the busbar body and form an electrical connection. When the nut is loosened relative to the external threaded post, the insert can slide up and down relative to the external threaded post through the adjustment hole to adjust its position relative to the busbar body.

[0010] Furthermore, in the above technical solution, the external threaded post is fixed to the front end of the busbar body by welding.

[0011] Furthermore, in the above technical solution, the externally threaded column includes a column formed by forward pressing and stretching from the rear end of the busbar body, and the column is provided with external threads on its exterior.

[0012] Furthermore, in the above technical solution, a first elastic washer is also fitted on the external threaded post. One surface of the first elastic washer contacts the surface of the insert, and the other surface of the first elastic washer contacts the inner side of the head of the external threaded post. The first elastic washer is in a compressed state.

[0013] Furthermore, in the above technical solution, the first elastic pad is a twisted disc-shaped pad.

[0014] Furthermore, in the above technical solution, the guide portion at the lower end of the insert is also provided with a limiting groove.

[0015] Furthermore, in the above technical solution, an insulating sleeve is also fitted on the busbar body. The insulating sleeve is provided with a clearance opening to avoid the nut, and an accommodating groove is opened on the inner wall of the upper end of the clearance opening. The accommodating groove is fitted around the upper end of the insert.

[0016] Furthermore, in the above technical solution, one end of the busbar body is also connected to a guide arm.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: In specific use, the present invention uses multiple plugs electrically connected to the main body of the busbar to be inserted into multiple circuit breakers and fastened with a 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 fixed to the plug corresponding to the damaged circuit breaker, loosen the nut on the plug, and pull the plug to slide upward relative to the external thread post through the adjustment hole, so that the plug is 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, without having to loosen the external thread post 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 the present invention highly competitive in the market. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 This is an exploded perspective view of the present invention;

[0021] Figure 4 This is a perspective view of the insulating sleeve in this utility model;

[0022] Figure 5 This is a diagram showing the usage state of this utility model;

[0023] Figure 6 This is a perspective view of the present invention after the insulating sleeve has been applied;

[0024] Figure 7 This is a cross-sectional view of another structure of this utility model. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0026] See Figure 1-7 As shown, an improved busbar includes 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. 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.

[0027] This utility model makes the busbar body 1 and the insert 2 into separate structures. The two are independent entities, but are connected together by assembly to form an electrical connection. The specific assembly structure is as follows:

[0028] The front end of the busbar body 1 is fixed with several spaced external threaded posts 11; each insert 2 has a vertically distributed adjustment hole 21 at its upper end, and the insert 2 is sleeved on the external threaded post 11 through the adjustment hole 21; the nut 22 is screwed on the external threaded post 11 to fasten the insert 2 to the front end of the busbar body 1 and form an electrical connection; when the nut 22 is loosened relative to the external threaded post 11, the insert 2 can slide up and down relative to the external threaded post 11 through the adjustment hole 21 to adjust its position relative to the busbar body 1. In practical use, this utility model uses multiple plugs 2 electrically connected to the busbar body 1, which are inserted into multiple circuit breakers 200 and secured with first screws. This ensures that the entire busbar and multiple circuit breakers 200 are electrically connected. These circuit breakers are installed on the mounting rail of the distribution cabinet using a clamping method. When a circuit breaker is detected to be damaged and needs to be replaced, simply loosen the first screw securing the plug 2 corresponding to the damaged circuit breaker, loosen the nut 22 on the plug 2, and pull the plug 2 to slide upward relative to the external threaded post 11 through the adjustment hole 21. This allows the plug 2 to detach from the damaged circuit breaker. At this time, the damaged circuit breaker is not restricted by the plug 2, allowing for quick removal of the damaged circuit breaker for replacement with a new one. It is not necessary to loosen the external threaded posts of other plugs 2 or remove other plugs 2 relative to other undamaged circuit breakers. This reduces procedures, is extremely convenient to operate, and has extremely high maintenance efficiency, giving this utility model a strong market competitiveness.

[0029] The externally threaded post 11 is fixed to the front end of the busbar body 1 by welding, so that the externally threaded post 11 is fixed to the front end of the busbar body 1 for the installation of the insert 2. In some other embodiments, the structure can also be as follows: the externally threaded post 11 includes a column formed by forward pressing and stretching the rear end of the busbar body 1, and the column is provided with external threads on the outside, that is, only the structure of the externally threaded post 11 is different.

[0030] 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 23 is fitted onto the externally threaded post 11. One surface of the first elastic washer 23 contacts the surface of the insert 2, and the other surface of the first elastic washer 23 contacts the inner side of the head of the externally threaded post 11. The first elastic washer 23 is in a compressed state. The compressed state of the first elastic washer 23 increases the elastic force, making the contact between the nut 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 23 is a twisted disc-shaped washer.

[0031] In some embodiments, the size of the first elastic washer 23 is larger than the size of the head of the nut 22, thereby increasing the contact area and making the head of the nut 22 more stably contact the insert 2 through the first elastic washer 23, thereby improving the overall assembly structure of the busbar to be more stable.

[0032] 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.

[0033] In some embodiments, an insulating sleeve 3 is also fitted onto the busbar body 1 to improve safety performance. The insulating sleeve 3 has a clearance opening 31 to avoid the nut 22, meaning the nut 2 is exposed within the clearance opening 31, ensuring the insulating sleeve 3 can be stably fitted onto the busbar body 1. Furthermore, the insulating sleeve 3 has an upward-facing receiving groove 32 on the inner wall of the upper end of the clearance opening 31. This receiving groove 32 is fitted around the upper periphery of the insert 2, thus covering the upper end of the insert 2, further improving safety performance. Simultaneously, it allows the insulating sleeve 3 to be more stably fitted onto the busbar body 1, preventing accidental detachment.

[0034] One end of the busbar body 1 is also connected to a guide arm 4. The guide arm 4 can be integrally formed on one end of the busbar body 1, or it can be fixed to the busbar body 1 by welding. Alternatively, it can be structured as follows: a first external threaded post is fixed on the busbar body 1, the lower end of the guide arm 4 is sleeved on the first external threaded post through a through hole, and then screwed onto the first external threaded post by a first nut, so as to fix the lower end of the guide arm 4 to the busbar body 1.

[0035] For enhanced safety, an insulator 41 is provided on the outside of the conductor arm 4, with only the two ends of the conductor arm 4 protruding beyond the two ends of the insulator 41.

[0036] In summary, in practical use, this utility model involves inserting multiple plugs 2, which are electrically connected to the busbar body 1, into multiple circuit breakers 200 and securing them with first screws. This ensures that the entire busbar and multiple circuit breakers 200 are electrically connected. These circuit breakers are all mounted on the mounting rail of the distribution cabinet using a clamping method. When a circuit breaker is detected to be damaged and needs to be replaced, it is only necessary to loosen the first screw securing the plug 2 corresponding to the damaged circuit breaker and loosen the nut 22 on that plug 2. Pulling the insert 2 allows it to slide upward relative to the external threaded post 11 through the adjustment hole 21, causing the insert 2 to detach from the damaged circuit breaker. At this point, the damaged circuit breaker is no longer restricted by the insert 2, allowing the damaged circuit breaker to be quickly removed and replaced with a new one without needing to loosen the external threaded post of other inserts 2 or remove other inserts 2 relative to other undamaged circuit breakers. This reduces the number of steps, makes the operation extremely convenient, and provides extremely high maintenance efficiency, giving this utility model a strong market competitiveness.

[0037] 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 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, characterized in that: The front end of the busbar body (1) is fixed with several spaced external threaded posts (11); each insert (2) is provided with vertically distributed adjustment holes (21) at its upper end, and the insert (2) is sleeved on the external threaded post (11) through the adjustment hole (21); the nut (22) is screwed on the external threaded post (11) to fasten the insert (2) to the front end of the busbar body (1) and form an electrical connection; when the nut (22) is loosened relative to the external threaded post (11), the insert (2) can slide up and down relative to the external threaded post (11) through the adjustment hole (21) to adjust its position relative to the busbar body (1).

2. The improved busbar according to claim 1, characterized in that: The external threaded post (11) is fixed to the front end of the busbar body (1) by welding.

3. The improved busbar according to claim 1, characterized in that: The external threaded column (11) includes a column formed by forward pressing and stretching the rear end of the busbar body (1), and the column is provided with external threads.

4. The improved bus according to any one of claims 1-3, characterized in that: The external threaded post (11) is also fitted with a first elastic gasket (23). One surface of the first elastic gasket (23) is in contact with the surface of the insert (2), and the other surface of the first elastic gasket (23) is in contact with the inner side of the head of the external threaded post (11). The first elastic gasket (23) is in a compressed state.

5. The improved busbar according to claim 4, characterized in that: The first elastic pad (23) is a twisted disc-shaped pad.

6. The improved bus according to claim 4, characterized in that: The guide portion at the lower end of the insert (2) is also provided with a limiting groove.

7. The improved bus according to any one of claims 1-3, characterized in that: An insulating sleeve (3) is also fitted on the main body (1) of the busbar. The insulating sleeve (3) is provided with a clearance opening (31) to avoid the nut (22), and the insulating sleeve (3) has an upward-facing receiving groove (32) on the inner wall of the upper end of the clearance opening (31). The receiving groove (32) is fitted around the upper end of the insert (2).

8. The improved bus according to any one of claims 1-3, characterized in that: One end of the busbar body (1) is also connected to a guide arm (4).

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