Expandable cable branch box busbar connection device

Abstract

The utility model belongs to cable branch box technical field, specifically disclose extensible cable branch box bus connecting device, including the shell, the inside fixedly connected with the partition board of shell, the back of partition board is provided with a plurality of limit stop, the front of each limit stop all is screwed the first lug, the utility model discloses the compression spring under the extrusion of first fixed block by clamping block, after entering the recess spring resets and pushes clamping block and recess inner wall close contact, utilize the inclined plane extrusion effect of clamping block and recess, make second fixed block produce the trend of moving upward, realize the automatic close butt joint of third lug and second limit ring, need not manual alignment, promote the efficiency of extension line assembly, then through the one end of first limit screw and clamping block surface contact, after screwing up can extrude and fix the position of clamping block, prevent clamping block displacement under the working condition such as vibration, satisfy the demand of multi-line extension, avoid the integral dismounting of extension connection, play the role of effectively reducing cost.

Description

Technical Field

[0001] This utility model relates to the field of cable branch box technology, specifically to an expandable cable branch box busbar connection device. Background Technology

[0002] In the construction and operation of power distribution networks, cable distribution boxes, as key equipment for cable line branching and transfer, are widely used in urban power distribution networks, industrial park power supply systems, and residential community power distribution projects. With the rapid development of the social economy, electricity load is showing a continuous growth trend, and users' requirements for power supply reliability and flexibility are constantly increasing. This poses more stringent challenges to the performance of cable distribution boxes, especially the adaptability and scalability of their busbar connection devices.

[0003] However, when adding lines to the circuit using existing technology, if the original connectors no longer meet the usage requirements, it is usually necessary to replace the entire connection line. This greatly increases the labor intensity of workers and the maintenance cost. Therefore, an expandable cable branch box busbar connection device is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide an expandable cable branch box busbar connection device to solve the problem mentioned in the background art that when adding lines to the circuit, the original connectors do not meet the usage requirements, and it is usually necessary to replace the entire connection line, which greatly increases the labor intensity of workers and the maintenance cost.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an expandable cable branch box busbar connection device, including a housing, a partition fixedly connected inside the housing, a plurality of limiting blocks provided on the back of the partition, a first protrusion threadedly connected to the front of each limiting block, a first limiting ring fixedly connected to the front of the first protrusion, a second protrusion provided inside the first limiting ring, a first fixing block fixedly connected to the front of the second protrusion, a circumferentially distributed elastic paddle fixedly connected to the back of the first fixing block, a positioning ring threadedly connected to the outer surface of the elastic paddle, one end of the positioning ring contacting the outer surface of the first fixing block, a groove formed on the outer surface of the bottom end of the first fixing block, a second limiting ring fixedly connected to the lower surface of the first fixing block, a terminal block fixedly connected to the front of the first fixing block, and a connecting device provided on the outer surface of the first fixing block.

[0006] Preferably, the connecting device includes a second fixing block, the surface of the second fixing block is in contact with the lower surface of the first fixing block, the upper surface of the second fixing block is provided with a connecting groove, the inner bottom wall of the connecting groove is fixedly connected with a third protrusion, and the outer surface of the third protrusion is in contact with the inner wall of the second limiting ring.

[0007] Preferably, the second fixing block has a sliding groove inside, and a locking block is slidably connected inside the sliding groove. One end of the locking block is in contact with the inside of the groove, and a spring is fixedly connected to the end of the locking block away from the groove. The end of the spring away from the locking block is fixedly connected to the inner wall of the sliding groove.

[0008] Preferably, the second fixing block has a first limiting screw internally threaded, and one end of the first limiting screw is in contact with the surface of the locking block.

[0009] Preferably, each of the limiting blocks has a slider inside, and each of the limiting blocks has a busbar inside, with one side of the slider in contact with the surface of the busbar.

[0010] Preferably, the surface of the limiting block is threaded with two second limiting screws, one end of which contacts the surface of the slider.

[0011] Preferably, a fixing strip is fixedly connected to the bottom of the partition, and the interior of the fixing strip is in contact with the surface of the busbar.

[0012] Preferably, a limiting strip is fixedly connected inside the outer shell, a back cover is fixedly connected to the back of the limiting strip, a cabinet door is hinged to the front of the outer shell, and dustproof nets are fixedly connected to both sides of the outer shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This expandable cable branch box busbar connection device features a locking block that compresses a spring under the pressure of the first fixing block. After entering the groove, the spring returns to its original position, pushing the locking block into close contact with the inner wall of the groove. Utilizing the inclined surface pressure of the locking block and the groove, the second fixing block tends to move upward, achieving automatic and tight docking between the third protrusion and the second limiting ring. This eliminates the need for manual alignment, improving the assembly efficiency of extended lines. Then, by contacting the surface of the locking block with one end of the first limiting screw and tightening it, the position of the locking block can be pressed and fixed, preventing displacement of the locking block under vibration and other operating conditions. This meets the needs of multi-line expansion, avoids the need for complete disassembly of the extended connection, and effectively reduces costs.

[0014] 2. In this expandable cable branch box busbar connection device, the first limiting ring is connected to the second protrusion inside, and a circumferentially distributed rubber elastic pad is fixed on the back of the first fixing block. The positioning ring is threadedly connected to the elastic pad. When tightened, the positioning ring applies a squeezing force to the elastic pad, so that the elastic pad fits tightly against the surface of the first limiting ring. This ensures the circuit conductivity between the first limiting ring and the second protrusion, avoids poor contact that could affect circuit safety, and also provides a certain degree of sealing and dustproof performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the expandable cable branch box busbar connection device of this utility model; Figure 2 This is a schematic diagram of the structure of the dustproof net of this utility model; Figure 3 This is a schematic diagram of the structure of the limiting block of this utility model; Figure 4 This is a schematic diagram of the structure of the first fixing block of this utility model; Figure 5 This is a schematic diagram of the structure of the second fixing block of this utility model; Figure 6 This is a schematic diagram of the slider of this utility model; Figure 7 This utility model Figure 5 Schematic diagram of the structure at point A; Figure 8 This utility model Figure 6 A schematic diagram of the structure at point B.

[0016] In the diagram: 1. Outer shell; 2. Cabinet door; 3. First limiting screw; 4. Back cover; 5. Dustproof mesh; 6. Limiting block; 7. Busbar; 8. Second limiting screw; 9. Limiting strip; 10. Fixing strip; 11. Partition; 12. Slider; 13. First protrusion; 14. First limiting ring; 15. Elastic lever; 16. Second protrusion; 17. Positioning ring; 18. First fixing block; 19. Terminal block; 20. Groove; 21. Third protrusion; 22. Second limiting ring; 23. Second fixing block; 24. Locking block; 25. Connecting groove; 26. Sliding groove; 27. Spring. Detailed Implementation

[0017] Please see Figure 1-8This utility model provides a technical solution: an expandable cable branch box busbar connection device, including a housing 1, a partition 11 fixedly connected inside the housing 1, and a plurality of limiting blocks 6 provided on the back of the partition 11. The partition 11 serves to limit and fix the position of the limiting blocks 6. A first protrusion 13 is threadedly connected to the front of each limiting block 6. The threaded connection between the first protrusion 13 and the limiting block 6 makes the connection between the limiting block 6 and the first protrusion 13 tighter. A first limiting ring 14 is fixedly connected to the front of the first protrusion 13. A second protrusion 16 is provided inside the first limiting ring 14. A first fixing block 18 is fixedly connected to the front of the second protrusion 16. A circumferentially distributed elastic paddle 15 is fixedly connected to the back of the first fixing block 18.

[0018] A positioning ring 17 is threadedly connected to the outer surface of the elastic lever 15. One end of the positioning ring 17 contacts the outer surface of the first fixing block 18. The elastic lever 15 is a rubber lever. Through the threaded connection between the positioning ring 17 and the elastic lever 15, the positioning ring 17 applies a squeezing force to the elastic lever 15, so that the elastic lever 15 is tightly limited and fixed on the surface of the first limiting ring 14. This makes the connection between the first limiting ring 14 and the second protrusion 16 tighter, effectively avoiding the problem of poor circuit contact between the first limiting ring 14 and the second protrusion 16. A groove 20 is opened on the outer surface of the bottom end of the first fixing block 18. A second limiting ring 22 is fixedly connected to the lower surface of the first fixing block 18. A terminal post 19 is fixedly connected to the front of the first fixing block 18. A connecting device is provided on the outer surface of the first fixing block 18.

[0019] The connecting device includes a second fixing block 23. The surface of the second fixing block 23 is in contact with the lower surface of the first fixing block 18. A connecting groove 25 is provided on the upper surface of the second fixing block 23. A third protrusion 21 is fixedly connected to the inner bottom wall of the connecting groove 25. The outer surface of the third protrusion 21 is in contact with the inner wall of the second limiting ring 22. The third protrusion 21 and the second limiting ring 22 serve to connect the internal wires of the first fixing block 18 and the second fixing block 23.

[0020] The second fixing block 23 has a sliding groove 26 inside, and a locking block 24 is slidably connected inside the sliding groove 26. One end of the locking block 24 is in contact with the inside of the groove 20. A spring 27 is fixedly connected to the end of the locking block 24 away from the groove 20. The end of the spring 27 away from the locking block 24 is fixedly connected to the inner wall of the sliding groove 26. The spring 27 pushes the locking block 24 to move towards one end of the sliding groove 26 under the limiting action of the sliding groove 26.

[0021] The second fixing block 23 has a first limiting screw 3 connected to its internal thread. One end of the first limiting screw 3 contacts the surface of the locking block 24. The first limiting screw 3 presses and fixes the locking block 24, making the locking block 24 and the groove 20 tightly connected, and further making the connection between the second fixing block 23 and the first fixing block 18 tighter.

[0022] Each limiting block 6 has a slider 12 inside, and each limiting block 6 has a busbar 7 inside. One side of the slider 12 is in contact with the surface of the busbar 7. The surface of the slider 12 is provided with tooth-shaped grooves. The slider 12 serves to limit and fix the busbar 7.

[0023] Among them, the surface of the limiting block 6 is threaded with two second limiting screws 8. One end of the two second limiting screws 8 is in contact with the surface of the slider 12. The two second limiting screws 8 serve to limit and fix the slider 12. The slider 12 squeezes the busbar 7, making the connection between the busbar 7 and the limiting block 6 tighter.

[0024] Among them, the bottom of the partition 11 is fixedly connected to a fixing strip 10, the inside of the fixing strip 10 is in contact with the surface of the busbar 7, and through the rear cover 4, it plays the role of limiting and fixing multiple busbars 7.

[0025] The outer shell 1 has a fixed internal connection of a limiting strip 9, a back cover 4 fixedly connected to the back of the limiting strip 9, a cabinet door 2 hinged to the front of the outer shell 1, and dustproof nets 5 fixedly connected to both sides of the outer shell 1. The limiting strip 9 serves to limit and fix the back cover 4, and the back cover 4 and cabinet door 2 serve to seal the device.

[0026] Working principle: In use, firstly, multiple busbars 7 are inserted into the interior of the housing 1 through the bottom of the housing 1, and then connected and fixed by bolts using fixing strips 10. Next, the busbars 7 are inserted into the limiting block 6 one by one, and then the second limiting screw 8 is tightened. This causes the second limiting screw 8 to push the slider 12 towards the side closer to the busbar 7. The toothed structure on the surface of the slider 12 ensures a tight connection with the busbar 7, preventing the busbar 7 from accidentally sliding out of the limiting block 6. Then, the limiting block 6 is placed on the surface of the partition 11, and the first protrusion 13 is screwed into the limiting block 6 from the front, causing the first protrusion 13 to... Block 13 is threadedly connected to the limiting block 6, pressing the partition 11 to limit and fix the position of the limiting block 6 and the first protrusion 13. Then, the second protrusion 16 is aligned with the inside of the first limiting ring 14 and inserted into the inside of the first limiting ring 14. At this time, the elastic paddle 15 is in contact with the outer surface of the first limiting ring 14. Then, the positioning ring 17 is rotated so that the positioning ring 17 is threadedly connected to the outer surface of the multiple elastic paddles 15. Due to the squeezing action of the positioning ring 17 on the elastic paddles 15, the elastic paddles 15 are tightly connected to the outer surface of the first limiting ring 14, preventing the first limiting ring 14 from separating from the second protrusion 16.

[0027] Then, the required connecting lines are connected and fixed to the terminal 19 on the front of the first fixing block 18. When additional connecting lines are needed, the connecting groove 25 inside the second fixing block 23 is brought into contact with the lower surface of the first fixing block 18, so that the third protrusion 21 is inserted into the interior of the second limiting ring 22. During this process, the upper inclined surface of one end of the locking block 24 first contacts the inclined surface at the bottom end of the first fixing block 18, squeezing the locking block 24 and causing it to slide into the slide groove 26 to compress the spring 27 until the locking block 24 passes over the outer surface of the first fixing block 18 and enters the interior of the groove 20. The slide groove 26 then resets and pushes the locking block 24 to move. This allows the locking block 24 to make close contact with the inner wall of the groove 20. Under the pressure of the inclined surface of the locking block 24 and the groove 20, the second fixing block 23 tends to move upward, making the connection between the third protrusion 21 and the second limiting ring 22 tighter. Then, the first limiting screw 3 is rotated by an external tool to further fix the position of the locking block 24, improving the tightness of the connection between the third protrusion 21 and the second limiting ring 22. Similarly, the remaining busbars 7 are assembled in sequence. During use, heat is exchanged with the outside through the dustproof net 5 to maintain the stable operation of the internal device of the outer shell 1.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An expandable cable branch box busbar connection device, comprising a housing (1), characterized in that: The shell (1) is internally fixedly connected to a partition (11). Multiple limiting blocks (6) are provided on the back of the partition (11). Each limiting block (6) has a first protrusion (13) threadedly connected to its front side. A first limiting ring (14) is fixedly connected to the front side of the first protrusion (13). A second protrusion (16) is provided inside the first limiting ring (14). A first fixing block (18) is fixedly connected to the front side of the second protrusion (16). A circular... The elastic paddles (15) are distributed around the perimeter. A positioning ring (17) is threadedly connected to the outer surface of the elastic paddles (15). One end of the positioning ring (17) is in contact with the outer surface of the first fixing block (18). A groove (20) is provided on the outer surface of the bottom end of the first fixing block (18). A second limiting ring (22) is fixedly connected to the lower surface of the first fixing block (18). A terminal post (19) is fixedly connected to the front of the first fixing block (18). A connecting device is provided on the outer surface of the first fixing block (18).

2. The expandable cable branch box busbar connection device according to claim 1, characterized in that: The connecting device includes a second fixing block (23), the surface of the second fixing block (23) is in contact with the lower surface of the first fixing block (18), the upper surface of the second fixing block (23) is provided with a connecting groove (25), the inner bottom wall of the connecting groove (25) is fixedly connected with a third protrusion (21), and the outer surface of the third protrusion (21) is in contact with the inner wall of the second limiting ring (22).

3. The expandable cable branch box busbar connection device according to claim 2, characterized in that: The second fixing block (23) has a sliding groove (26) inside. A locking block (24) is slidably connected inside the sliding groove (26). One end of the locking block (24) is in contact with the inside of the groove (20). A spring (27) is fixedly connected to the end of the locking block (24) away from the groove (20). The end of the spring (27) away from the locking block (24) is fixedly connected to the inner wall of the sliding groove (26).

4. The expandable cable branch box busbar connection device according to claim 3, characterized in that: The second fixing block (23) has a first limiting screw (3) connected to its internal thread, and one end of the first limiting screw (3) is in contact with the surface of the locking block (24).

5. The expandable cable branch box busbar connection device according to claim 4, characterized in that: Each of the limiting blocks (6) is provided with a slider (12) inside, and each of the limiting blocks (6) is provided with a busbar (7) inside. One side of the slider (12) is in contact with the surface of the busbar (7).

6. The expandable cable branch box busbar connection device according to claim 5, characterized in that: The surface of the limiting block (6) is threaded with two second limiting screws (8), one end of which is in contact with the surface of the slider (12).

7. The expandable cable branch box busbar connection device according to claim 6, characterized in that: The bottom of the partition (11) is fixedly connected to a fixing strip (10), and the interior of the fixing strip (10) is in contact with the surface of the busbar (7).

8. The expandable cable branch box busbar connection device according to claim 7, characterized in that: The inner side of the outer shell (1) is fixedly connected to a limiting strip (9), and the back side of the limiting strip (9) is fixedly connected to a back cover (4). The front side of the outer shell (1) is hinged to a cabinet door (2), and both sides of the outer shell (1) are fixedly connected to dustproof nets (5).

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