A universal connection structure for insulated tubular busbars

Abstract

This invention relates to the field of cable connection technology, specifically to a universal connection structure for an insulated tubular busbar. It includes a pressing assembly, which comprises a vertical rod rotatably disposed in the center of a ball head; a screw is coaxially connected to the lower side of the vertical rod, and a slider is disposed on the lower side of the screw. Multiple locking blocks are evenly arranged on the sidewall of the slider, and a transmission assembly is disposed on the lower side of the pressing assembly. This invention presses down the locking blocks as the slider slides downwards. Each locking block slides out from around the bottom of the ball head and engages in a locking groove, fixing the ball head and ball seat in place. Simultaneously, the slider presses down the transmission assembly, ensuring a tight fit between the silver-plated copper foil and the current receiving plate. This locks the ball head and the connecting assembly while simultaneously completing the connection between the silver-plated copper foil and the current receiving plate, avoiding situations where locking is in place but conductive contact has not been established, or where excessive locking to reduce contact resistance leads to device jamming.

Description

Technical Field

[0001] This invention relates to the field of cable connection technology, and more specifically, to a universal connection structure for an insulated tubular busbar. Background Technology

[0002] Insulated tubular busbars, due to their advantages such as high current carrying capacity, good insulation performance, compact structure, and small footprint, have been widely used in power transmission and distribution systems such as substations, power plants, large industrial enterprises, and rail transit. In actual engineering installations, insulated tubular cable busbars are typically laid in sections, spliced ​​on-site. Due to the complex on-site environment, the installation positions of adjacent cable busbar sections are inevitably affected by multiple factors: on the one hand, uneven settlement of equipment foundations after long-term operation may lead to slight height differences or horizontal offsets between adjacent equipment interfaces; on the other hand, installation errors in the busbar support structure, manufacturing tolerances of each busbar section, and natural changes in the path at corners can all cause slight angular deviations between the axes of adjacent busbar sections.

[0003] When installing cable busbars, it often happens that two sections of insulated tubular busbars are already in place on the supporting structure, but their end flange faces cannot be perfectly aligned. If traditional rigid butt flanges or fixed intermediate joints are used for connection, external force is required to forcibly pull the two busbar ends closer and tighten them. While this forced assembly method achieves a physical connection, it subjectes the busbar ends to additional bending stress. During long-term operation, this stress continuously acts on the interface between the insulation layer and the conductor, leading to minor issues such as localized cracking of the insulation layer and decreased sealing performance, or more serious issues such as conductor fatigue fracture or abnormally high contact resistance at the connection interface. Field feedback indicates that such connection failures caused by installation deviations have become one of the main factors affecting the long-term operational reliability of insulated tubular busbar systems.

[0004] To address the aforementioned issues, existing technologies have proposed corresponding improvements. In the field of busbar connections, existing technologies have developed universal connectors that utilize a spherical joint structure to achieve adaptive angle adjustment. These connectors absorb installation deviations through the fit between the ball head and the socket, thereby eliminating forced stress at the busbar ends. However, such existing universal connection structures still have significant shortcomings in terms of electrical contact. Specifically, in existing universal joint structures, electrical conductivity between the ball head and the socket is typically achieved through rigid metal surface contact or simply by applying conductive paste. When the ball head deflects at an angle within the socket, the contact area between the two changes, resulting in uneven contact pressure distribution. Point or line contact easily occurs on some contact surfaces, leading to unstable contact resistance. More importantly, existing structures lack an intermediate transmission mechanism that can effectively convert the locking force into uniform and stable conductive contact pressure. When operators tighten the lock nut, the locking force acts directly on the rigid contact surface between the ball head and the socket. On the one hand, it is difficult to ensure the uniformity of contact pressure across the entire contact surface; on the other hand, there is no clear transmission path or matching relationship between the locking force and the conductive contact pressure. This often results in the contradiction of locking in place but not establishing conductive contact, or over-tightening to reduce contact resistance, causing the ball joint to jam. In view of this, this invention proposes a universal joint structure for an insulated tubular busbar. Summary of the Invention

[0005] The purpose of this invention is to provide a universal connection structure for insulated tubular busbars to solve the problem mentioned in the background art that existing universal connectors, while achieving adaptive angle adjustment, lack an intermediate transmission mechanism to effectively convert locking force into uniform and stable conductive contact pressure, resulting in situations where locking is in place but conductive contact has not been established, or where excessive locking to reduce contact resistance causes the spherical pair to jam.

[0006] To solve the above problems, a universal connection structure for an insulated tubular busbar is provided, including a ball head, wherein a pressing component is disposed inside the ball head, and the pressing component includes a vertical rod rotatably disposed in the middle of the ball head; A screw is fixedly and coaxially connected to the lower side of the vertical rod, and a slider is provided on the lower side of the screw, which is slidably disposed inside the ball head; The screw is threaded into the slider, and the vertical rod drives the slider to slide through the screw when it rotates; Multiple locking blocks are evenly arranged on the side wall of the slider, and the ball head has a slot that matches the locking blocks. Each locking block can slide out from the bottom of the ball head. A transmission component is provided on the lower side of the pressing component, and the slider is located at the middle position on the upper side of the transmission component.

[0007] While pushing the locking block, the slider applies pressure to the copper-based elastic mesh, spring sheet stack and silver-plated copper foil through the fixing block, and uniformly converts the locking force applied by the pressing component into conductive contact pressure distributed throughout the current receiving plate. When the ball head deflects at an angle, the contact gap is automatically compensated by isotropic elastic deformation. The silver-plated copper foil and the current receiving plate always maintain a surface contact state to ensure stable current transmission.

[0008] As a further improvement to this technical solution, a slide rail is fixedly provided inside the ball head to limit the slider, restricting it to only slide up and down; One end of the vertical rod passes through the ball head and is positioned on its upper side, and a throttle is fixedly installed at the end of the vertical rod.

[0009] When the throttle is turned, the vertical rod and the screw rotate accordingly. As the vertical rod drives the screw to rotate, the slider slides up and down with the rotation of the screw.

[0010] As a further improvement to this technical solution, the transmission component includes a copper-based elastic mesh, a spring sheet stack, and a silver-plated copper foil that are fixedly connected from top to bottom. The copper-based elastic mesh, the spring sheet stack, and the silver-plated copper foil are disposed on the lower side of the ball head, and the copper-based elastic mesh is attached to the bottom of the ball head. The silver-plated copper foil protrudes slightly outward from the contour of the ball head in its initial state.

[0011] The current is transmitted downwards through the copper-based elastic mesh, the spring sheet stack, and the silver-plated copper foil in sequence. The core value of the three-layer design lies in functional decoupling and performance synergy - decomposing the multiple performance requirements such as elasticity, conductivity, fatigue resistance, and oxidation resistance, which are difficult to achieve with a single material, and assigning them to different layers to ensure that the current can be transmitted stably.

[0012] As a further improvement to this technical solution, a connecting frame is fixedly provided at the middle position on the upper side of the copper-based elastic mesh, and the connecting frame is slidably disposed inside the ball head; A fixing block is fixedly installed on the upper side of the connecting frame, and the fixing block is located on the lower side of the slider.

[0013] As the slider slides downwards, its lower end gradually contacts and presses down on the fixed block. Under the pressure of the slider, the copper-based elastic mesh transmits the pressure layer by layer to the silver-plated copper foil.

[0014] As a further improvement to this technical solution, a tension spring for limiting the movement of the connecting frame is provided on the outer side, and the tension spring is fixedly disposed on the upper side of the connecting frame. A fixing ring is fixedly provided on the upper side of the tension spring. The fixing ring is fixedly provided inside the ball head, and the end of the slider can pass through the middle of the fixing ring.

[0015] In the initial state, pressure is applied to the copper-based elastic mesh by a tension spring, ensuring that the copper-based elastic mesh remains in contact with the bottom of the ball head.

[0016] As a further improvement to this technical solution, a connecting component is provided on the lower side of the ball head, the connecting component includes a ball seat, and a connecting block is fixedly provided on the lower side of the ball seat; The ball seat has slots inside that are adapted to each locking block. A current receiving plate corresponding to the silver-plated copper foil is provided on the lower side of the slots. The current receiving plate is fixedly installed inside the ball seat.

[0017] After being pressed, the silver-plated copper foil fits tightly against the current receiving plate, so that the locking force applied by the pressing component is evenly converted into conductive contact pressure distributed throughout the current receiving plate. When the ball head deflects at an angle, the contact gap is automatically compensated by isotropic elastic deformation. The silver-plated copper foil and the current receiving plate always maintain a surface contact state to ensure stable current transmission.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the universal connection structure of this insulated tubular busbar, turning the throttle drives the vertical rod and screw to rotate, simultaneously causing the slider to slide downwards. During the downward sliding process, the slider presses down the locking blocks. Each locking block slides out from around the bottom of the ball head and locks into the slot, fixing the ball head and ball seat in place. At the same time as the slider slides downwards, it presses down the transmission component, making the silver-plated copper foil fit tightly against the current receiving board. While locking the ball head and the connecting component, the connection between the silver-plated copper foil and the current receiving board is completed. This avoids situations where the locking is in place but the conductive contact has not been established, or where excessive locking to reduce contact resistance causes the device to jam, thus improving the stability of the device.

[0019] 2. In the universal connection structure of this insulated tubular busbar, during power transmission, the current is transmitted step by step through the copper-based elastic mesh, spring sheet stack, and silver-plated copper foil. The copper-based elastic mesh, spring sheet stack, and silver-plated copper foil uniformly convert the locking force applied by the pressing component into conductive contact pressure distributed throughout the entire current receiving plate. When the ball head deflects at an angle, the contact gap is automatically compensated through isotropic elastic deformation, always maintaining a surface contact state. This enables mechanical locking, angle adjustment, and conductive contact to work together, solving the core problems of incoordination between locking force and conductive voltage and contact failure caused by angle deflection in traditional structures, thus improving the reliability of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is one of the schematic diagrams of the internal structure of the ball head of the present invention; Figure 3 This is a second schematic diagram of the internal structure of the ball head of the present invention; Figure 4 This is a schematic diagram of the pressing component and the transmission component of the present invention; Figure 5 This is an exploded view of the transmission component structure of the present invention; Figure 6 This is a top view of the ball head and connecting assembly structure of the present invention; Figure 7 This is an exploded view of the connecting component and locking block structure of the present invention; Figure 8 This is a cross-sectional view of the wiring conduit structure of the present invention.

[0021] The meanings of the labels in the diagram are as follows: 1. Ball head; 2. Pressing assembly; 21. Vertical rod; 22. Screw; 23. Slider; 24. Locking block; 25. Rotary handle; 3. Transmission component; 31. Copper-based elastic mesh; 32. Spring sheet stack; 33. Silver-plated copper foil; 34. Connecting frame; 35. Fixing block; 36. Tension spring; 37. Fixing ring; 38. Connecting seat; 4. Connecting assembly; 41. Ball seat; 42. Connecting block; 43. Slot; 44. Current receiving plate; 45. Pin hole; 46. Sealing ring; 47. Slide groove; 5. Pin; 6. Locking block; 7. Wiring conduit; 8. Friction strip; 9. Telescopic power cord. Detailed Implementation

[0022] 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.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Example 1

[0024] First, please refer to Figure 1 and Figure 6The purpose of this embodiment is to provide a universal connection structure for an insulated tubular busbar, including a ball head 1. A connecting component 4 is provided on the lower side of the ball head 1. The connecting component 4 includes a ball seat 41. In order to facilitate the initial connection between the ball head 1 and the ball seat 41, a pin 5 is fixedly provided on the lower side of the ball head 1. A pin hole 45 corresponding to the pin 5 is fixedly provided inside the ball seat 41. When connecting the connecting component 4 and the ball seat 41, the pin 5 is inserted into the pin hole 45 to complete the initial positioning of the ball head 1 and the ball seat 41, laying the foundation for the subsequent precise connection of the ball head 1 and the ball seat 41.

[0025] For further details, please refer to Figure 3 and Figure 8 A connecting block 42 is fixedly installed on the lower side of the ball seat 41. A wiring tube 7 is fixedly installed on one side of both the ball head 1 and the connecting block 42. After the initial connection between the ball head 1 and the ball seat 41 is completed, the cable connector is inserted into the wiring tube 7 on one side of the ball head 1 and the connecting block 42. In order to make the connection between the cable connector and the wiring tube 7 more secure, several friction strips 8 are fixedly installed on the inner wall of the wiring tube 7 to enhance the friction between the inner wall of the wiring tube 7 and the cable connector.

[0026] After the initial connection between the ball head 1 and the ball seat 41 is completed, adjust the ball head 1 to the appropriate angle by rotating it. To make the connection between the ball head 1 and the ball seat 41 more secure, please refer to [the relevant documentation]. Figures 2-6 The ball head 1 is provided with a pressing component 2. The pressing component 2 includes a vertical rod 21 rotatably disposed in the middle of the ball head 1. One end of the vertical rod 21 passes through the ball head 1 and is disposed on its upper side. A handle 25 is fixedly disposed at the end of the vertical rod 21. The vertical rod 21 is rotated by rotating the handle 25. Furthermore, a screw 22 is fixedly and coaxially connected to the lower side of the vertical rod 21. When the vertical rod 21 rotates, it synchronously drives the screw 22 to rotate. A slider 23 is provided on the lower side of the screw 22. The slider 23 is slidably disposed inside the ball head 1. The screw 22 is threadedly connected to the slider 23. When the vertical rod 21 rotates, it drives the slider 23 to slide through the screw 22. In order to prevent the slider 23 from rotating with the screw 22, a slide rail is fixedly provided inside the ball head 1 to limit the slider 23, restricting it to slide only up and down. This allows the slider 23 to slide up and down with the rotation of the screw 22 when the vertical rod 21 drives the screw 22 to rotate. Multiple locking blocks 24 are evenly arranged on the side wall of the slider 23. The ball head 1 has a slot that matches the locking blocks 24. Each locking block 24 can slide out from the bottom of the ball head 1. As the slider 23 slides down with the rotation of the screw 22, it presses each locking block 24 down. After being pressed by the slider 23, one end of the locking block 24 slides out from the bottom of the ball head 1. The ball seat 41 has a slot 43 that matches each locking block 24. After each locking block 24 slides out from the bottom of the ball head 1, it is inserted into the slot 43 to complete the connection between the ball head 1 and the ball seat 41.

[0027] For further details, please refer to Figures 3-6 A transmission component 3 is provided on the lower side of the pressing component 2. The slider 23 is located in the middle position on the upper side of the transmission component 3. The transmission component 3 includes a copper-based elastic mesh 31, a spring sheet stack 32 and a silver-plated copper foil 33, which are fixedly connected from top to bottom. It is used to transmit current from the inside of the ball head 1 to the ball seat 41. The copper-based elastic mesh 31, the spring sheet stack 32 and the silver-plated copper foil 33 are located on the lower side of the ball head 1, and the copper-based elastic mesh 31 is attached to the bottom of the ball head 1. The ball head 1 is internally fixed with a telescopic power cord 9, which can be extended and retracted. The upper side of the copper-based elastic mesh 31 is fixed with a connecting seat 38 corresponding to the telescopic power cord 9. The two ends of the telescopic power cord 9 are fixedly connected to the wiring pipe 7 and the connecting seat 38 respectively. The current is transmitted to the copper-based elastic mesh 31 through the telescopic power cord 9, and then transmitted step by step through the copper-based elastic mesh 31, the spring sheet stack 32 and the silver-plated copper foil 33. The core value of the three-layer design lies in functional decoupling and performance synergy - decomposing the multiple performance requirements such as elasticity, conductivity, fatigue resistance and oxidation resistance that are difficult to achieve with a single material into different layers to ensure that the current can be transmitted stably. Secondly, the silver-plated copper foil 33 protrudes slightly outward from the outline of the ball head 1 in the initial state. A current receiving plate 44 corresponding to the silver-plated copper foil 33 is provided on the lower side of the slot 43. The current receiving plate 44 is fixedly installed inside the ball seat 41. When the ball head 1 and the ball seat 41 are initially connected, the silver-plated copper foil 33 makes slight contact with the current receiving plate 44 to obtain the initial preload. A power line is connected between the current receiving plate 44 and the wiring pipe 7 on one side of the connecting block 42. After the silver-plated copper foil 33 contacts the current receiving plate 44, the current is transmitted backward through the current receiving plate 44 and the power line on its lower side.

[0028] To ensure a tight fit between the silver-plated copper foil 33 and the current receiving board 44, please refer to... Figures 3-6A connecting frame 34 is fixedly installed at the middle position of the upper side of the copper-based elastic mesh 31. The connecting frame 34 is slidably installed inside the ball head 1. A fixing block 35 is fixedly installed on the upper side of the connecting frame 34. The fixing block 35 is located on the lower side of the slider 23. When the slider 23 slides down, the lower end of the slider 23 gradually contacts the fixing block 35 and presses it down. Under the pressure of the slider 23, the copper-based elastic mesh 31 transmits the pressure layer by layer to the silver-plated copper foil 33, so that the silver-plated copper foil 33 is tightly attached to the current receiving plate 44. On the other hand, during the downward movement of the slider 23, one end of the locking block 24 is pushed into the slot. In step 43, the ball head 1 and the ball seat 41 are connected. On the other hand, while pushing the card block 24, the slider 23 applies pressure to the copper-based elastic mesh 31, the spring sheet stack 32 and the silver-plated copper foil 33 through the fixing block 35, so that the silver-plated copper foil 33 is tightly attached to the current receiving plate 44. The locking force applied by the pressing component 2 is uniformly converted into conductive contact pressure distributed throughout the current receiving plate 44. When the ball head 1 deflects at an angle, the contact gap is automatically compensated by isotropic elastic deformation. The silver-plated copper foil 33 and the current receiving plate 44 always maintain a surface contact state to ensure that the current can be transmitted stably. The technical advantages of the transmission component 3 are reflected in the following aspects: In terms of electrical performance, it achieves uniform distribution of contact pressure throughout the entire range, stable contact resistance, and the silver-plated copper foil 33 has long-term anti-oxidation capability; in terms of mechanical cooperation, it forms a pressure linkage with the pressing component 2, and a single tightening action simultaneously completes mechanical locking and conductivity optimization; in terms of system integration, it achieves decoupling and synergy between mechanical locking, angle adjustment, and conductive contact, solving the core problems of incoordination between locking force and conductive voltage and contact failure caused by angle deflection in traditional structures, and significantly improving the reliability of the device.

[0029] Secondly, please refer to Figures 3-5 To prevent the copper-based elastic mesh 31 from sliding down in the initial state, a tension spring 36 is provided on the outer side of the connecting frame 34 to limit its movement. The tension spring 36 is fixedly installed on the upper side of the connecting frame 34, and a fixing ring 37 is fixedly installed on the upper side of the tension spring 36. The fixing ring 37 is fixedly installed inside the ball head 1. In the initial state, the tension spring 36 applies pressure to the copper-based elastic mesh 31, so that the copper-based elastic mesh 31 is always in contact with the bottom of the ball head 1, and the end of the slider 23 can pass through the middle of the fixing ring 37 to ensure that the slider 23 can smoothly contact the fixing block 35 and press it down during the downward movement.

[0030] To prevent moisture from seeping in through the gap between the ball head 1 and the ball seat 41, please refer to... Figure 6 A sealing ring 46 is fixedly provided on the upper side of the ball seat 41 to seal the gap between the ball head 1 and the ball seat 41. After the ball head 1 and the ball seat 41 are connected, the ball head 1 and the sealing ring 46 fit tightly together to prevent moisture from entering the interior of the ball seat 41.

[0031] To prevent the ball head 1 and ball seat 41 from shifting at an angle due to impact or prolonged use, please refer to... Figure 3 and Figure 7 A locking block 6 is provided on the side wall of the ball head 1 to connect the ball head 1 and the ball seat 41. The locking block 6 is fixedly connected to the ball head 1 and the ball seat 41 by two screws respectively. The side wall of the ball seat 41 is provided with a sliding groove 47 that matches the screw on the lower side of the locking block 6. By tightening the two screws on one side of the locking block 6, the locking block 6 is tightly fixed between the ball head 1 and the ball seat 41 to ensure that the angle between the ball head 1 and the ball seat 41 remains unchanged under the impact of external force or long-term use, thereby improving the stability of the device.

[0032] Therefore, based on the above, the working principle of the present invention can be summarized as follows: By inserting the pin 5 into the pin hole 45 inside the ball seat 41, the initial connection between the ball head 1 and the ball seat 41 is completed. Then, the corresponding cable connectors are inserted into the connecting pipe 7 on one side of the ball head 1 and the connecting block 42, respectively, and the angle of the ball head 1 is adjusted. Then, the handle 25 is turned to drive the vertical rod 21 and the screw 22 to rotate, and simultaneously drive the slider 23 to slide down. During the sliding down process, the slider 23 pushes out one end of the locking block 24 and locks it into the slot 43. At the same time, the slider 23 presses the fixing block 35 down, so that the silver-plated copper foil 33 is tightly attached to the current receiving plate 44, and the locking force applied by the pressing component 2 is evenly converted into conductive contact pressure distributed throughout the current receiving plate 44 to ensure that the current can be transmitted stably. Then, the two screws on one side of the locking block 6 are tightened to fix the locking block 6 between the ball head 1 and the ball seat 41 to ensure that the angle of the ball head 1 and the ball seat 41 remains unchanged when the device is subjected to external impact.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal connection structure for an insulated tubular busbar, comprising a ball head (1), characterized in that: The ball head (1) is provided with a pressing component (2), which includes a vertical rod (21) rotatably disposed in the middle of the ball head (1). A screw (22) is fixedly and coaxially connected to the lower side of the vertical rod (21), and a slider (23) is provided on the lower side of the screw (22). The slider (23) is slidably disposed inside the ball head (1). The screw (22) is threaded into the slider (23), and the vertical rod (21) drives the slider (23) to slide through the screw (22) when it rotates; Multiple locking blocks (24) are evenly arranged on the side wall of the slider (23). The ball head (1) has a slot that matches the locking block (24). Each locking block (24) can slide out from the bottom of the ball head (1). A transmission component (3) is provided on the lower side of the pressing component (2), and the slider (23) is located at the middle position on the upper side of the transmission component (3).

2. The universal connection structure of the insulated tubular busbar according to claim 1, characterized in that: The ball head (1) is fixedly provided with a slide rail for limiting the slider (23) to slide only up and down; One end of the vertical rod (21) passes through the ball head (1) and is positioned on its upper side, and a throttle (25) is fixedly provided at the end of the vertical rod (21).

3. The universal connection structure of the insulated tubular busbar according to claim 1, characterized in that: The transmission component (3) includes a copper-based elastic mesh (31), a spring sheet stack (32), and a silver-plated copper foil (33) that are fixedly connected from top to bottom. The copper-based elastic mesh (31), the spring sheet stack (32), and the silver-plated copper foil (33) are disposed on the lower side of the ball head (1), and the copper-based elastic mesh (31) is attached to the bottom of the ball head (1). The silver-plated copper foil (33) protrudes slightly out of the outline of the ball head (1) in the initial state.

4. The universal connection structure of the insulated tubular busbar according to claim 3, characterized in that: A connecting frame (34) is fixedly provided at the middle position on the upper side of the copper-based elastic mesh (31), and the connecting frame (34) is slidably disposed inside the ball head (1); A fixing block (35) is fixedly provided on the upper side of the connecting frame (34), and the fixing block (35) is located on the lower side of the slider (23).

5. The universal connection structure of the insulated tubular busbar according to claim 4, characterized in that: The outer side of the connecting frame (34) is provided with a tension spring (36) for limiting its movement, and the tension spring (36) is fixedly disposed on the upper side of the connecting frame (34); A fixing ring (37) is fixedly provided on the upper side of the tension spring (36). The fixing ring (37) is fixedly provided inside the ball head (1), and the end of the slider (23) can pass through the middle of the fixing ring (37).

6. The universal connection structure of the insulated tubular busbar according to claim 3, characterized in that: A connecting component (4) is provided on the lower side of the ball head (1). The connecting component (4) includes a ball seat (41), and a connecting block (42) is fixedly provided on the lower side of the ball seat (41). The ball seat (41) has a slot (43) inside that is compatible with each card block (24). A current receiving plate (44) corresponding to the silver-plated copper foil (33) is provided on the lower side of the slot (43). The current receiving plate (44) is fixedly installed inside the ball seat (41).

7. The universal connection structure of the insulated tubular busbar according to claim 6, characterized in that: A pin (5) is fixedly provided on the lower side of the ball head (1), and a pin hole (45) corresponding to the pin (5) is fixedly provided inside the ball seat (41). A sealing ring (46) for sealing the gap between the ball head (1) and the ball seat (41) is fixedly provided on the upper side of the ball seat (41).

8. The universal connection structure of the insulated tubular busbar according to claim 7, characterized in that: The ball head (1) has a locking block (6) on its side wall for connecting the ball head (1) and the ball seat (41). The locking block (6) is fixedly connected to the ball head (1) and the ball seat (41) by two screws respectively. The ball seat (41) has a sliding groove (47) on its side wall that is compatible with the screw on the lower side of the locking block (6).

9. The universal connection structure of the insulated tubular busbar according to claim 6, characterized in that: A wiring tube (7) is fixedly provided on one side of both the ball head (1) and the connecting block (42), and a number of friction strips (8) are fixedly provided on the inner wall of the wiring tube (7).

10. The universal connection structure of the insulated tubular busbar according to claim 3, characterized in that: A retractable power cord (9) is fixedly installed inside the ball head (1), and the retractable power cord (9) can be extended or retracted; The upper side of the copper-based elastic mesh (31) is fixedly provided with a connector (38) corresponding to the telescopic power cord (9), and the two ends of the telescopic power cord (9) are fixedly connected to the wiring pipe (7) and the connector (38) respectively.

Images