A quick-tapping low-voltage cable branch box

Abstract

The application relates to the technical field of cable jointing and arranging device, and relates to a quick-branching type low-voltage cable branch box, which comprises a main box body, the bottom of the main box body is provided with a sealing wire clamping mechanism, the inner bottom end of the main box body is fixed with a lower support, the sealing wire clamping mechanism comprises a fixed ring fixed at the bottom of the main box body, a threading ring is rotationally connected to the fixed ring, a threading groove is formed in the position corresponding to the threading ring on the bottom of the main box body, and a tooth ring is fixed to the bottom of the threading ring; when the maintenance door is opened, the pushing mechanism is driven to move outward by the reset spring, the wire clamps of the bidirectional sliding mechanism are separated from each other through the transmission structure, the space above the bottom threading groove is completely opened, there is no any obstruction, external wiring can be easily threaded into the threading groove and extended to the high-position holding frame, the branching can be completed by directly connecting with the quick connector on the holding frame without additional dismounting or adjusting the structure, the operation is simple, and the branching is convenient.

Description

Technical Field

[0001] This invention belongs to the technical field of cable connection and wiring equipment, specifically relating to a quick-connect type low-voltage cable branch box. Background Technology

[0002] Quick-connect low-voltage cable branch boxes are core equipment in low-voltage power distribution systems for cable branching, transfer, and capacity expansion. They are widely used in community power distribution, municipal engineering, temporary power supply, industrial plants, and other scenarios. Their core requirement is to simplify the wiring process, improve construction efficiency, and meet the requirements for quick on-site branching and maintenance.

[0003] Existing quick-connect low-voltage cable branch boxes mostly use fixed sealing sleeves or split clamp designs for the bottom cable threading structure. When threading the cable, it is necessary to force the cable through the sealing sleeve or manually pry open the clamp before connecting the joint. Due to the limited opening space of the sealing sleeve or clamp, the cable is prone to friction with the structural components during the threading process, which is not only laborious but may also scratch the cable insulation layer. At the same time, the process of manually adjusting and fixing the clamp position is cumbersome and requires multiple people to complete the threading and connection, resulting in a long overall branching process and making it difficult to truly achieve efficient and fast branching. Therefore, it is necessary to design a quick-connect low-voltage cable branch box. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and rationally designed quick-connect low-voltage cable branch box to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A quick-connect low-voltage cable branch box includes a main box body. A sealing wire clamping mechanism is provided at the bottom of the main box body. A lower support is fixed at the bottom of the main box body. The sealing wire clamping mechanism includes a fixing ring fixed to the bottom of the main box body. A wire threading ring is rotatably connected to the fixing ring. A wire threading groove is provided at the bottom of the main box body corresponding to the position of the wire threading ring. A toothed ring is fixed at the bottom of the wire threading ring. A bidirectional sliding mechanism connecting the toothed ring is provided on the fixing ring. A wire clamp is installed on the bidirectional sliding mechanism. An inspection door is rotatably connected to the main box body. A push mechanism connecting the bidirectional sliding mechanism is provided on the inspection door.

[0006] As a further optimization of the present invention, the bidirectional sliding mechanism includes a support rail symmetrically fixed on the side wall of the fixed ring, a rack that meshes with the toothed ring is slidably connected on the support rail, and a support spring is connected between the rack and the support rail.

[0007] As a further optimization of the present invention, a connector is fixed to one end of the rack, the connector is fixed to the sliding block, the sliding block is slidably connected in the slide rail at the bottom of the main housing, the wire clamp is fixed to the top of the sliding block, and an elastic pad is provided on the inner wall of the wire clamp.

[0008] As a further optimization of the present invention, the wire clamp is located inside the main housing, and a binding frame is fixed between the lower supports, with the binding frame located above the wire clamp.

[0009] As a further optimization of the present invention, the pushing mechanism includes a baffle fixed to the bottom of the inspection door, one side of the baffle abutting against a push frame that is slidably connected to the main housing, a return spring being provided between the push frame and the main housing, and the push frame abutting against a connecting member.

[0010] As a further optimization of the present invention, the top of the push frame is symmetrically provided with guide rods, which are slidably connected to the elongated slots opened on the inclined block. The main housing is provided with a lower sleeve, which has a lower slot for the inclined block to slide in. The inclined block is slidably connected to the lower sleeve through the L-shaped bracket at the bottom, and the contact surface between the lower sleeve and the L-shaped bracket is a frosted surface.

[0011] As a further optimization of the present invention, a square block is slidably connected in the lower sleeve, the bottom end of the square block is provided with an inclined surface, and a support frame is fixed on the top of the square block.

[0012] As a further optimization of the present invention, the bottom of the support frame is fixed with an outer support that is slidably connected to the lower sleeve, and the support frame is provided with a quick connector.

[0013] As a further optimization of the present invention, the top of the lower support is provided with a side support fixed to the inner wall of the main box, a mounting bracket is provided between the side supports, and a ventilation groove is provided on the side wall of the main box.

[0014] The beneficial effects of this invention are as follows: 1. When the maintenance door is opened, the push mechanism, under the action of the reset spring, drives the push frame to move outward. Through the transmission structure, the wire clamps of the bidirectional sliding mechanism move away from each other, completely opening the space above the bottom wire slot without any obstruction. External wires can be easily passed through the wire slot and extended to the high support frame without additional disassembly or structural adjustment. They can be directly connected to the quick connector on the support frame to complete the splitting. The entire process does not require complex operations such as crimping or welding, which greatly simplifies the wire threading and splitting process and achieves rapid splitting.

[0015] 2. When the maintenance door is closed, the baffle pushes the push frame inward, and the meshing transmission of the rack and toothed ring drives the wire clamps on both sides to move closer to each other. The elastic pads on the inner wall of the wire clamps tightly adhere to and cover the cables from both sides. On the one hand, the columnar structure formed after the wire clamps are in contact with each other, together with the elastic pads, can effectively seal the gap between the cable tray and the cable, ensuring the sealing performance of the enclosure. On the other hand, the elastic pads have good elastic deformation capabilities, which can absorb the vibration energy transmitted from the outside during the operation of the cable, forming a flexible support for the cable, effectively mitigating the impact of vibration on the cable and the connection parts of the connector, and avoiding loosening of the connection due to vibration.

[0016] 3. During the closing process of this invention, as the push frame continues to move, the inclined block moves out of the lower slot of the lower sleeve. The square block, which loses its abutment support, drives the support frame to move down and reset in a short distance. When the support frame moves down, the cable it supports droops down and becomes naturally relaxed. This completely releases the tension stress that may be generated after the cable is clamped, avoids the cable being in a taut state for a long time and generating continuous pulling force, and prevents the pulling force from being transmitted to the quick connector, causing the connector connection to become loose, poor contact, or damaged internal conductive structure. This significantly improves the connection stability of the quick-connect part and extends the service life of the connector and cable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the position of the pushing mechanism in this invention; Figure 3 yes Figure 2 A magnified view of a portion of region A in the middle; Figure 4 This is a schematic diagram of the internal structure of the main housing in this invention; Figure 5 This is a partial structural schematic diagram of the sealing wire clamping mechanism in this invention; Figure 6 This is an assembly diagram of the sealing wire clamping mechanism in this invention; Figure 7 This is a schematic diagram showing the cooperation relationship between the sealing clamping mechanism and the pushing mechanism in this invention.

[0018] In the diagram: 1. Main housing; 2. Inspection door; 3. Ventilation slot; 4. Lower support; 5. Side support; 6. Sealing wire clamping mechanism; 7. Pushing mechanism; 8. Mounting bracket; 9. Wire threading groove; 10. Support bracket; 11. External support; 12. Quick connector; 61. Fixing ring; 62. Wire threading ring; 63. Toothed ring; 64. Bidirectional sliding mechanism; 65. Wire clamp; 66. Bundling bracket; 71. Baffle; 72. Pushing bracket; 73. Return spring; 74. Inclined block; 75. Lower sleeve; 76. Square block; 641. Support rail; 642. Rack; 643. Support spring; 644. Connector; 645. Sliding block; 646. Slide rail. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example: Please refer to Figures 1-7A quick-connection type low-voltage cable branch box includes a main box 1. A sealing clamping mechanism 6 is provided at the bottom of the main box 1. A cable passage 9 is provided at the bottom of the main box 1 for external wiring to pass through. The sealing clamping mechanism 6 is used to elastically wrap the cable passing through the cable passage 9 and simultaneously seal the cable passage 9. A lower support 4 is fixed to the bottom of the main box 1, and side supports 5 are symmetrically fixed to the top of the lower support 4. The side supports 5 are fixedly connected to the inner wall of the main box 1. A mounting bracket 8 is fixed between the side supports 5. The mounting bracket 8 is used to support electrical components for cable connection. Ventilation slots 3 are provided on the side walls of both sides of the main box 1. The sealing clamping mechanism 6 includes a fixing ring 61 fixed to the bottom of the main box 1 by screws. A cable passage ring 62 is rotatably connected to the fixing ring 61. The cable passage ring 62 is located directly below the cable passage 9. A toothed ring 63 is fixed to the bottom of the cable passage ring 62. A connecting ring 63 is provided on the fixing ring 61. The bidirectional sliding mechanism 64 of the toothed ring 63 has a wire clamp 65 installed on it. The inner wall of the wire clamp 65 is provided with an elastic pad. The wire clamp 65 is located inside the main housing 1 and is attached to the main housing 1. The bidirectional sliding mechanism 64 can drive the two wire clamps 65 to move closer or further apart. When the wire clamps 65 move away, the space above the cable tray 9 can be fully opened to facilitate the passage of cables. When the wire clamps 65 move closer and abut against each other, the elastic pad on the inner wall can cover the cable, providing elastic buffering while sealing the cable tray 9. The main housing 1 is rotatably connected to the inspection door 2. The inspection door 2 is provided with a pushing mechanism 7, which is used to drive the bidirectional sliding mechanism 64 to operate. The pushing mechanism 7 is provided with a support frame 10, and a quick connector 12 is fixed on the support frame 10. The electrical components on the mounting frame 8 are connected to the external cables through the quick connector 12 to realize the quick connection of the branch box.

[0021] Please see Figures 2-3 , Figure 5 and Figure 7 The bidirectional sliding mechanism 64 includes a support rail 641 symmetrically fixed on the side wall of the fixed ring 61. A rack 642 is slidably connected to the support rail 641. The rack 642 is symmetrically distributed on both sides of the toothed ring 63 and meshes with the toothed ring 63. A support spring 643 is connected between the rack 642 and the support rail 641. A connector 644 is fixed to one end of the rack 642. The connector 644 is fixed to the sliding block 645 by screws. The sliding block 645 is slidably connected in the slide rail 646 at the bottom of the main housing 1. The slide rail 646 is located on both sides of the wire groove 9. The wire clamp 65 is fixed to the top of the sliding block 645. A binding frame 66 is fixed between the lower supports 4. The binding frame 66 is located above the wire clamp 65.

[0022] In the non-stressed state, the support spring 643 does not deform, the sliding block 645 is located at the end of the slide rail 646, and the sliding blocks 645 on both sides are at their farthest positions. The wire clamps 65 on the top of the sliding blocks 645 are far apart from each other, and the wire groove 9 is fully opened. When the wire groove 9 needs to be opened, the pushing mechanism 7 acts on the connector 644 on one side. After the connector 644 is subjected to force, it pushes the rack 642 on one side to slide. It can drive the rack 642 on the other side to slide in the opposite direction through the meshing toothed ring 63. The support spring 643 is stretched. At the same time, during the sliding process, the sliding blocks 645 and wire clamps 65 on both sides move closer to each other until the wire clamps 65 on both sides are in contact with each other. While the elastic pad of the inner wall covers the cable, the columnar structure formed cooperates with the cable to seal the wire groove 9. Before the wire clamps 65 move closer to each other, the cable tie needs to be used to initially tie the cable to the bundling frame 66 to maintain the position of the cable and ensure that the wire clamps 65 can cover the cable from both sides.

[0023] Please see Figures 2-7The pushing mechanism 7 includes a baffle 71 fixed to the bottom of the inspection door 2. When the door is closed, one side of the baffle 71 abuts against the pushing frame 72. The pushing frame 72 is slidably connected to the main housing 1. A return spring 73 is provided between the pushing frame 72 and the main housing 1. When the inspection door 2 is opened, the pushing frame 72 extends outward under the support of the return spring 73. When the inspection door 2 is closed, the baffle 71 abuts against the pushing frame 72 and pushes the pushing frame 72 to slide inward into the main housing 1. During the inward sliding process, the pushing frame 72 can contact and abut against the connecting piece 644, thereby providing a pushing force for the movement of the connecting piece 644. Guide rods are symmetrically arranged on the top of the pushing frame 72, and the guide rods are slidably connected to the inclined block 7. 4. A long, narrow slot is provided in the main housing 1, and a lower sleeve 75 is provided inside the main housing 1. The lower sleeve 75 has a lower slot for the inclined block 74 to slide and nest. An L-shaped bracket is fixed to the bottom of the inclined block 74. The L-shaped bracket is slidably connected in the square slot of the lower sleeve 75, and the contact surface between the lower sleeve 75 and the L-shaped bracket is a frosted surface. A square block 76 is slidably connected in the lower sleeve 75. The bottom end of the square block 76 is provided with an inclined surface. The support frame 10 is fixed to the top of the square block 76. The bottom of the support frame 10 is fixed with an outer support 11 that is slidably connected to the lower sleeve 75. When the inspection door 2 is opened, the return spring 73 returns to its original length, pushing the push frame 72 to move outward. During the outward movement, the guide rod of the push frame 72... After sliding to one end of the elongated slot, it will push the inclined block 74 to slide together until the inclined block 74 slides into the lower slot of the lower sleeve 75. During the process, the inclined block 74 abuts against and pushes the inclined surface of the bottom of the square block 76, causing the square block 76 and the support bracket 10 to move upward in a short distance. At this time, the wire clamp 65 moves away from and opens the wire passage 9. After completing the wiring or maintenance, close the maintenance door 2. During the process, the baffle 71 contacts and pushes the pusher 72 to slide into the main housing 1. The guide rod at the top of the pusher 72 first disengages from one end of the elongated slot. The inclined block 74 remains in place under the friction of the lower sleeve 75 and the L-shaped bracket. The pusher 72 continues to move, and the lower wire clamps 65 move closer to each other. The elastic pad on the inner wall of the wire clamp 65 The cable contacts and wraps around the cable from both sides, while the guide rod slides to the other end of the long slot. The position of the cable between the clamps 65 is restricted by the friction of the elastic pad and maintains its position under the action of friction. The inclined block 74 moves out of the lower slot. After the inclined block 74 is no longer abutting, the square block 76 and the support bracket 10 move down and reset in a short distance. At this time, the cable slot 9 is completely closed, and the cable can be naturally relaxed as the support bracket 10 moves down. This effectively avoids the cable from being in a tense state after being clamped, thus preventing the tensile force from being transmitted to the quick connector 12, which could cause the connector to loosen, have poor contact, or be damaged in the internal conductive structure. This ensures the connection stability and service life of the quick-connect part.

[0024] It should be noted that in this type of quick-connect low-voltage cable branch box, when the branch box is not in use or is under maintenance standby, the maintenance door 2 remains open, the return spring 73 is in a naturally extended state, and pushes the pusher frame 72 to extend outward from the main box 1; the guide rod at the top of the pusher frame 72 slides to one end of the long slot of the inclined block 74, and drives the inclined block 74 to slide into the lower slot of the lower sleeve 75. Through the inclined block 74 abutting against the inclined surface at the bottom of the square block 76, the square block 76 and the top support frame 10 move upward in a short distance, and the external support... 11 moves upward synchronously with the support frame 10 and remains stable. The support frame 10 is in a high support position. In the sealed wire clamping mechanism 6, the support spring 643 of the bidirectional sliding mechanism 64 is not deformed. The rack 642 is located at the end of the support rail 641 under the tension of the support spring 643. The connector 644 drives the sliding block 645 to the farthest position on both sides of the slide rail 646. The wire clamps 65 on both sides move away from each other, completely opening the space above the wire groove 9. The wire groove 9 is in an unobstructed state. The bundling frame 66 remains empty, waiting for the cable to be fixed. When splicing cables, ensure that the ventilation slots 3 on both sides of the main enclosure 1 remain open to provide ventilation and heat dissipation channels for the enclosure; the electrical components on the mounting bracket 8 are pre-connected to the quick connectors 12 on the support bracket 10 and are ready for docking. During the cable threading and quick disconnection process, the operator inserts the external incoming or outgoing cable from the cable threading groove 9 at the bottom of the main housing 1 upwards, passes through the cable threading ring 62 and the open clamp 65 in sequence, and extends to the high support frame 10. The cable end is then directly connected to the quick connector 12 on the support frame 10. The quick connector 12 enables quick connection between the cable and electrical components without the need for additional crimping, welding or bolt fixing, achieving the effect of plug and disconnect. This completes the distribution of low-voltage cables. The cable is then initially bundled on the bundling frame 66 with cable ties. The bundling frame 66 limits the lateral position of the cable, ensuring that the cable is between the two clamps 65. After the disassembly is completed, the operator rotates the inspection door 2 in the reverse direction to initiate the closing process. During the closing of the inspection door 2, the bottom baffle 71 first contacts and pushes against the pusher 72, overcoming the elastic force of the return spring 73 and pushing the pusher 72 to slide into the main housing 1. In the initial stage of the pusher 72 sliding inward, the top guide rod gradually disengages from one end of the long slot of the inclined block 74. Since the contact surface between the lower sleeve 75 and the L-shaped bracket is a frosted surface, the inclined block 74 remains in place, and the pusher 72 continues to slide inward. Its end contacts and pushes against the connector 644 of the bidirectional sliding mechanism 64, causing one side rack 642 to slide along the support rail 641. Since the rack 642 meshes with the toothed ring 63 at the bottom of the threading ring 62, when one side rack 642 slides, it is driven by the toothed ring 63 to drive the other side rack 642 to slide in the opposite direction. The support spring 643 is stretched synchronously, and the racks 642 on both sides slide through the connector 64. 4. The sliding blocks 645 move closer to each other along the slide rail 646. The wire clamps 65 on the top of the sliding blocks 645 move towards each other synchronously until the elastic pads on the inner wall of the wire clamps 65 come into contact with and cover the cable from both sides. The push frame 72 continues to slide, and the guide rod finally slides to the other end of the long slot of the inclined block 74. After the wire clamps 65 close, the cable position is fixed by the friction between the elastic pads and the cable to prevent loosening. At the same time, the inclined block 74 moves out from the lower slot of the lower sleeve 75. After losing the support of the inclined block 74, the square block 76 and the support frame 10 move down and reset under their own weight. After the support frame 10 moves down, the cable hangs down and becomes naturally relaxed, avoiding continuous tension and pulling force. The wire clamps 65 on both sides come into contact with each other to form a columnar structure. With the tight coverage of the elastic pads and the cable, the gap between the wire groove 9 and the cable is completely sealed to achieve a seal. The maintenance door 2 is completely closed, and the branch box enters the operating state. When it is necessary to repair a faulty circuit or add a new branch circuit, unlock and open the maintenance door 2. The reset spring 73 in the push mechanism 7 returns to its natural extension state, pushing the push frame 72 to extend outward from the main housing 1. During the outward movement of the push frame 72, the guide rod slides to one end of the long slot of the inclined block 74 and drives the inclined block 74 to slide into the lower slot of the lower sleeve 75. The inclined block 74 pushes against the square block 76, causing the support frame 10 to move up to a high position. At the same time, the push frame 72 disengages from the connector 644, the support spring 643 of the bidirectional sliding mechanism 64 retracts and resets, causing the racks 642, sliding blocks 645 and wire clamps 65 on both sides to move away from each other. The wire slot 9 reopens, and the operator can cut the cable ties on the bundling frame 66, disconnect the quick connector 12 for fault repair, or insert new cables.

[0025] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A quick-connect type low-voltage cable branch box, comprising a main box body (1), characterized in that: The bottom of the main housing (1) is provided with a sealing wire clamping mechanism (6), and the bottom of the main housing (1) is fixed with a lower support (4). The sealing wire clamping mechanism (6) includes a fixing ring (61) fixed to the bottom of the main housing (1), a wire threading ring (62) is rotatably connected to the fixing ring (61), a wire threading groove (9) is opened at the bottom of the main housing (1) corresponding to the position of the wire threading ring (62), a toothed ring (63) is fixed to the bottom of the wire threading ring (62), a bidirectional sliding mechanism (64) connecting the toothed ring (63) is provided on the fixing ring (61), a wire clamp (65) is installed on the bidirectional sliding mechanism (64), and an inspection door (2) is rotatably connected to the main housing (1). A pushing mechanism (7) connecting the bidirectional sliding mechanism (64) is provided on the inspection door (2). The bidirectional sliding mechanism (64) includes a support rail (641) symmetrically fixed on the side wall of the fixed ring (61), a rack (642) that meshes with the toothed ring (63) is slidably connected on the support rail (641), and a support spring (643) is connected between the rack (642) and the support rail (641). The pushing mechanism (7) includes a baffle (71) fixed to the bottom of the inspection door (2). One side of the baffle (71) abuts against a pusher (72) that is slidably connected to the main housing (1). A return spring (73) is provided between the pusher (72) and the main housing (1). A connector (644) abuts against the pusher (72). One end of the rack (642) is fixedly connected to the connector (644). The connector (644) is fixed on the sliding block (645). The wire clamp (65) is fixed on the sliding block (645). The top of the moving block (645) and the inner wall of the wire clamp (65) are provided with elastic pads; the top of the push frame (72) is symmetrically provided with guide rods, which are slidably connected to the long slots opened on the inclined block (74). The main box (1) is provided with a lower sleeve (75), which is provided with a lower slot for the inclined block (74) to slide. The inclined block (74) is slidably connected to the lower sleeve (75) through the L-shaped bracket at the bottom, and the contact surface between the lower sleeve (75) and the L-shaped bracket is a frosted surface.

2. The quick-connect type low-voltage cable branch box according to claim 1, characterized in that: The sliding block (645) is slidably connected in the slide (646) at the bottom of the main body (1).

3. A quick-connect type low-voltage cable branch box according to claim 2, characterized in that: The wire clamp (65) is located inside the main housing (1), and a binding frame (66) is fixed between the lower supports (4). The binding frame (66) is located above the wire clamp (65).

4. The quick-connect type low-voltage cable branch box according to claim 1, characterized in that: A square block (76) is slidably connected in the lower sleeve (75). The bottom end of the square block (76) is provided with an inclined surface, and a support frame (10) is fixed on the top of the square block (76).

5. A quick-connect low-voltage cable branch box according to claim 4, characterized in that: The bottom of the support frame (10) is fixed with an outer support (11) that is slidably connected to the lower sleeve (75), and a quick connector (12) is provided on the support frame (10).

6. A quick-connect low-voltage cable branch box according to claim 1, characterized in that: The top of the lower support (4) is provided with a side support (5) fixed to the inner wall of the main box (1), and an installation bracket (8) is provided between the side supports (5). A ventilation groove (3) is provided on the side wall of the main box (1).

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