Low-voltage power cable assembly and cable assembly assembling method

Abstract

The invention relates to the technical field of cable assemblies, in particular to a low-voltage power cable assembly and an assembling method of the cable assembly.The low-voltage power cable assembly comprises a cable body, two symmetrically-arranged connecting mechanisms are arranged in the middle of the cable body, the two connecting mechanisms are clamped through a clamping assembly, and each connecting mechanism comprises a wire clamping cylinder; a sealing assembly and a copper sheath are sequentially installed in the wire clamping cylinder from back to front, an air chamber is arranged between the copper sheath and the wire clamping cylinder, the wire clamping cylinder is rotationally sleeved with a rotating cylinder, and a first-stage locking mechanism for limiting the rotating cylinder is arranged at the tail of the wire clamping cylinder. The cable copper core clamping device has the beneficial effects that a multi-module cooperative adjustment structure is adopted, the clamping module, the gas clamping module and the hoop module are innovatively arranged, the inner diameter of a copper sheath is cooperatively adjusted through different mechanical transmission modes, stable clamping of a cable copper core is achieved, and compared with a traditional single clamping mode, the clamping effect is better, and connection is more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable assemblies, and in particular to a low-voltage power cable assembly and an assembling method of the cable assembly. Background Art

[0002] In low-voltage power transmission systems, the connection quality of cable assemblies is crucial, and it directly affects the safety and reliability of the power system. The mechanical strength, sealing performance and installation convenience of cable connectors are core issues that have long been of concern in this field.

[0003] Traditional low-voltage cable connections mostly use crimping or threaded locking structures. For example, the patent with publication number CN220754327U discloses a quick-connect cable connector that improves waterproof performance by combining a threaded block with a sealing block. However, this type of structure still has significant defects in practical applications: Insufficient mechanical stability: A single clamping method (such as threaded clamping or one-way clamp) is prone to loosening under vibration or external force, resulting in increased contact resistance and even the risk of power failure, especially in environments with high humidity and large temperature changes; Simplified sealing structure: Existing sealing designs mostly rely on static compression of rubber rings and lack a dynamic pressure compensation mechanism. After long-term use, the seals are prone to failure due to material aging or deformation, making it difficult to meet the needs of complex outdoor working conditions. Lack of modular coordination: The functional modules of traditional connectors (such as conductivity, sealing, and locking) operate independently and lack a linkage adjustment mechanism. Installation requires step-by-step operation, which is inefficient and difficult to ensure the balance of multi-dimensional clamping force.

[0004] Based on this, the present invention provides a low voltage power cable assembly and an assembly method of the cable assembly to solve the problems raised in the above background technology. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a low-voltage power cable assembly and an assembly method of a cable assembly to solve the problems of unstable cable assembly connection, poor sealing effect, inconvenient installation, susceptibility to external force leading to connection failure, and inability of multiple modules to work together when the existing cable assembly is in use.

[0006] The technical solution of the present invention to solve the above technical problem is as follows: a low-voltage power cable assembly comprises a cable body, wherein two symmetrically arranged connecting mechanisms are arranged in the middle of the cable body, and the two connecting mechanisms are connected by a connecting assembly; The connecting mechanism comprises a wire clamping cylinder, a sealing assembly and a copper sleeve are sequentially installed inside the wire clamping cylinder from back to front, an air chamber is arranged between the copper sleeve and the wire clamping cylinder, a rotating cylinder is rotatably sleeved on the wire clamping cylinder, a primary locking mechanism for limiting the rotating cylinder is arranged at the tail of the wire clamping cylinder, a large gear ring and a small gear ring are respectively installed on the rotating cylinder, a group of clamping modules, a group of air clamping modules and a clamping hoop module driven by the small gear ring are arranged in the air chamber, the clamping module, the air clamping module and the clamping hoop module are all used for adjusting the inner diameter of the copper sleeve, a copper column electrically connected to the copper sleeve is fixedly installed on the wire clamping cylinder, a conductive cylinder is slidably sleeved on the copper column, and a connecting plate is installed at the end of the conductive cylinder; The clamping assembly includes a threaded head fixed on a connecting plate and a secondary locking mechanism, and a front ratchet is rotatably mounted on the connecting plate, a threaded sleeve is fixedly mounted on the other connecting plate, the threaded sleeve is adaptively connected to the threaded head, a group of transmission rods are installed on the front ratchet, a synchronous rotating ring is slidably connected to the threaded sleeve, and each of the transmission rods is slidably connected to the synchronous rotating ring.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, each of the clamping modules includes a clamp slidably connected to the wire clamping cylinder and a bidirectional screw rod rotatably connected to the wire clamping cylinder, the tail end of the bidirectional screw rod is fixedly installed with a first gear that is transmission-connected to the large gear ring, and the bidirectional screw rod is respectively provided with a first positive thread segment and a first negative thread segment, and a driving block is transmission-installed on the first positive thread segment and the first negative thread segment, and a connecting arm is hinged between the two driving blocks and the clamp.

[0009] The beneficial effect of adopting the above-mentioned further scheme is that when the rotating drum or the large gear ring is driven, the two driving blocks can be synchronously approached to each other through the setting of the bidirectional screw rod. When the two driving blocks are synchronously approached to each other, the distance between the clamp and the copper sheath is reduced. By controlling the number of rotations of the bidirectional screw rod, the pressure and clamping strength of the clamp on the copper sheath can be adjusted. Through the synchronous clamping setting of the clamps in multiple clamping modules, the inner diameter of the copper sheath is finally changed. After the inner diameter of the copper sheath is changed, the exposed copper end part of the cable body is effectively wrapped and clamped.

[0010] Furthermore, the air clamp module includes an air box installed in the air chamber, the air outlet end of the air box is connected to the air chamber, a piston plate is slidably installed on the inner wall of the air box, a one-way screw is rotatably installed on the wire clamp cylinder, a second gear connected to the large ring gear is fixedly installed on the tail end of the one-way screw, and the one-way screw is connected to the piston plate.

[0011] The beneficial effect of adopting the above-mentioned further scheme is that when the rotating drum or the large gear ring is driven, the one-way screw rotates, and the one-way screw rotates, thereby driving the piston plate to move. After the piston plate moves, the volume of the air chamber is reduced. After the volume of the air chamber changes, the internal pressure of the air chamber is increased. After the internal pressure of the air chamber is increased, the copper sheath is driven to wrap tightly around the exposed copper end part of the cable body, and finally the gap ratio between the copper sheath and the exposed copper end part is reduced.

[0012] The sealing assembly includes a sealing ring installed on the inner wall of the wire clamping cylinder and a first clamping hoop sleeved on the outside of the sealing ring, the sealing ring is made of insulating rubber, and a first clamping screw is rotatably installed at the tail of the wire clamping cylinder, and first bevel teeth are installed on the first clamping screw and the bidirectional screw, and the two first bevel teeth are meshed with each other, and a second positive thread segment and a second reverse thread segment are respectively provided on the first clamping screw, and the second positive thread segment and the second reverse thread segment are respectively transmission-connected with the two clamping parts of the first clamping hoop.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that when the rotating drum or the large gear ring is driven, the first clamping screw is set so that the first clamping hoop can fully clamp the sealing ring. Through the clamping of the sealing ring by the first clamping hoop, on the one hand, the sealing strength of the sealing ring to the exposed copper end part can be effectively improved, and on the other hand, the wire clamping drum and the cable body can be tightly and firmly connected.

[0014] Furthermore, the clamping hoop module includes a second clamping screw and a clamping shaft rotatably connected to the wire clamping barrel, the second clamping screw and the clamping shaft are both equipped with a second bevel tooth, the two second bevel teeth are meshed with each other, the tail end of the clamping shaft is fixedly equipped with a third gear transmission connected to the small gear ring, the copper sleeve is sleeved with a second clamping hoop, the second clamping screw is respectively provided with a third positive thread segment and a third reverse thread segment, the third positive thread segment and the third reverse thread segment are respectively transmission connected to the two clamping parts of the second clamping hoop.

[0015] The beneficial effect of adopting the above further scheme is that when the rotating drum or the large gear ring is driven, the second clamping hoop clamps the copper sleeve tightly. After the second clamping hoop clamps the copper sleeve tightly, on the one hand, it can further improve the clamping degree of the copper sleeve to the exposed copper end part, and on the other hand, it can complete the secondary connection and tightening of the wire clamping drum and the cable body.

[0016] Furthermore, the primary locking mechanism includes a rear ratchet installed in the rotating drum and a first locking claw hinged to the tail of the wire clamping cylinder, and the secondary locking mechanism includes a second locking claw, which is hinged to a connecting plate installed adjacent to the front ratchet. Torsion springs are provided at the hinge between the first locking claw and the wire clamping cylinder and at the hinge between the second locking claw and the connecting plate.

[0017] The beneficial effect of adopting the above further scheme is that, when in use, by setting the first locking claw and the second locking claw, the rotating cylinder and the threaded sleeve can only rotate in one direction when there is no external force, thereby ensuring the connection strength of the two connecting mechanisms and preventing the two connecting mechanisms from being separated by mistake.

[0018] Furthermore, a group of transmission guide grooves distributed in a circular array are provided on the threaded sleeve, and a driven slider is installed inside the synchronous rotating ring and corresponding to the position of each transmission guide groove. Each driven slider is slidably connected to the transmission guide groove at the corresponding position, and the axis of the transmission rod is parallel to the axis of the wire clamping cylinder.

[0019] The beneficial effect of adopting the above further solution is that, through the provision of the transmission guide groove and the driven slider, the threaded sleeve and the synchronous rotating ring are rotated synchronously, thereby limiting the rotating direction of the synchronous rotating ring.

[0020] Furthermore, a corrugated rubber sleeve is installed between the connecting plate and the wire clamping cylinder, a limit spring is installed between the connecting plate and the wire clamping cylinder, and the corrugated rubber sleeve is sleeved on the outside of the limit spring.

[0021] Furthermore, the copper sleeve is made of soft copper, is a hollow cylindrical structure with an open tail end, and has a thickness of 1 mm to 3 mm.

[0022] The beneficial effect of adopting the above further solution is that a method for assembling a low-voltage power cable assembly comprises the following steps: SS01, preset, when it is necessary to connect two segmented cable bodies into one, firstly, the connection ends of the two segmented cable bodies are stripped, and after the stripping, the copper cores of the two ends of the cable bodies are exposed; SS02, clamping, after step SS01, a connecting mechanism is respectively installed on the leaking copper core parts of the two ends of the cable body. After the connecting mechanism is installed, the copper sheath can finally complete the clamping and sealing of the leaking copper core; SS03, fixation, after step SS02, the two connection mechanisms are connected as one through the threaded connection between the threaded head and the threaded sleeve to achieve electrical conduction. After the two connection mechanisms are connected as one, the assembly of the cable assembly is completed.

[0023] The beneficial effects of the present invention are: 1. The present invention adopts a multi-module collaborative adjustment structure, innovatively arranges a clamping module, an air clamping module and a clamping module, and collaboratively adjusts the inner diameter of the copper sheath through different mechanical transmission methods to achieve a stable clamping of the cable copper core. Compared with the traditional single clamping method, the clamping effect is better and the connection is more stable.

[0024] 2. The present invention adopts a double locking anti-separation design. The setting of the primary locking mechanism and the secondary locking mechanism enables the rotating cylinder and the threaded sleeve to rotate only in one direction when there is no external force, effectively preventing the two connecting mechanisms from being separated by mistake, and enhancing the connection strength and reliability of the cable assembly.

[0025] 3. The present invention is provided with a reinforced sealing structure. The sealing component not only has an insulating rubber sealing ring, but also drives the first clamping hoop to clamp the sealing ring through the first clamping screw, thereby improving the sealing strength of the cable copper core, effectively preventing the intrusion of impurities such as moisture and dust, and extending the service life of the cable.

[0026] 4. The present invention adopts a convenient connection and installation method. Through the design of the snap-on assembly and the cooperation between the threaded head and the threaded sleeve, as well as the setting of the synchronous rotating ring and the transmission rod, the rapid connection and electrical conduction of the two connecting mechanisms are achieved, which simplifies the installation process and improves the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a low-voltage power cable assembly of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle; Figure 3 It is a schematic diagram of the structure of the rotating drum and the corrugated rubber sleeve of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B in the middle; Figure 5 It is a schematic diagram of the cross-sectional structure of the copper column and the air chamber of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the local enlarged structure at C in the middle; Figure 7 It is a schematic structural diagram of the wire clamping drum and the air box of the present invention; Figure 8 It is a schematic diagram of the structure of the copper sleeve and the first locking claw of the present invention; Fig. 9 For the present invention Figure 8 A schematic diagram of the local enlarged structure at D in the middle; Fig.10 It is a schematic diagram of the structure of the copper sleeve and the second hoop of the present invention; Fig.11 It is a schematic structural diagram of the first gear and the clamp of the present invention; Fig.12 It is a structural schematic diagram of the air box of the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Cable body; 2. Wire clamp; 3. Copper sleeve; 4. Rotating drum; 5. Large gear ring; 6. Small gear ring; 7. Copper column; 8. Conductive cylinder; 9. Connecting plate; 10. Threaded head; 11. Front ratchet; 12. Threaded sleeve; 13. Transmission rod; 14. Synchronous rotating ring; 15. Air chamber; 16. Clamp; 17. Bidirectional screw; 18. First gear; 19. Driving block; 20. Connecting arm; 21. Drum air box; 22. Piston plate; 23. One-way screw; 24. Second gear; 25. Sealing ring; 26. First clamping hoop; 27. First clamping screw; 28. Second clamping screw; 29. ​​Clamping shaft; 30. Third gear; 31. Second clamping hoop; 32. Rear ratchet; 33. First locking claw; 34. Second locking claw; 35. Transmission guide groove; 36. Corrugated rubber sleeve; 37. Limit spring. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] like Figure 1-12 As shown, a low-voltage power cable assembly includes a cable body 1, the cable body 1 is a low-voltage cable, and two symmetrically arranged connecting mechanisms are provided in the middle of the cable body 1, and the two connecting mechanisms are connected by a clamping assembly; The connection mechanism includes a wire clamping barrel 2, and a sealing assembly and a copper sleeve 3 are installed in the wire clamping barrel 2 from the back to the front, and an air chamber 15 is provided between the copper sleeve 3 and the wire clamping barrel 2; The copper sleeve 3 is made of soft copper and is a hollow cylindrical structure with an open tail end. The thickness of the copper sleeve 3 is 2 mm. A rotating drum 4 is rotatably sleeved on the clamping drum 2, and a primary locking mechanism for limiting the position of the rotating drum 4 is provided at the tail of the clamping drum 2. A large gear ring 5 and a small gear ring 6 are respectively installed on the rotating drum 4. A group of clamping modules, a group of air clamping modules and a clamping module driven by the small gear ring 6 are provided in the air chamber 15. The clamping module, the air clamping module and the clamping module are all used for adjusting the inner diameter of the copper sleeve 3. Each clamping module includes a clamp 16 slidably connected to the wire clamping cylinder 2 and a bidirectional screw rod 17 rotatably connected to the wire clamping cylinder 2. The tail end of the bidirectional screw rod 17 is fixedly installed with a first gear 18 that is transmission-connected to the large gear ring 5. The bidirectional screw rod 17 is respectively provided with a first positive thread segment and a first negative thread segment. A driving block 19 is transmission-mounted on the first positive thread segment and the first negative thread segment. A connecting arm 20 is hinged between the two driving blocks 19 and the clamp 16.

[0031] When the drum 4 or the large gear ring 5 is driven, the two-way screw rod 17 is set so that the two drive blocks 19 can approach each other synchronously. When the two drive blocks 19 approach each other synchronously, the distance between the clamp 16 and the copper sheath 3 is reduced. By controlling the number of rotations of the two-way screw rod 17, the pressure and clamping strength of the clamp on the copper sheath 3 can be adjusted. Through the synchronous clamping setting of the clamp 16 in multiple clamping modules, the inner diameter of the copper sheath 3 is finally changed. After the inner diameter of the copper sheath 3 is changed, the exposed copper end part of the cable body 1 is effectively wrapped and clamped.

[0032] The air clamp module includes an air box 21 installed in the air chamber 15, the air outlet end of the air box 21 is connected to the air chamber 15, a piston plate 22 is slidably installed on the inner wall of the air box 21, a one-way screw rod 23 is rotatably installed on the wire clamp cylinder 2, and a second gear 24 that is transmission-connected to the large gear ring 5 is fixedly installed on the tail end of the one-way screw rod 23, and the one-way screw rod 23 is transmission-connected to the piston plate 22.

[0033] When the drum 4 or the large gear ring 5 is driven, the one-way screw 23 rotates, and the one-way screw 23 rotates, thereby driving the piston plate 22 to move. After the piston plate 22 moves, the volume of the air chamber 15 is reduced. After the volume of the air chamber 15 changes, the internal pressure of the air chamber 15 increases. After the internal pressure of the air chamber 15 increases, the copper sheath 3 is driven to wrap the exposed copper end portion of the cable body 1 tightly, and finally the gap ratio between the copper sheath 3 and the exposed copper end portion is reduced.

[0034] The sealing assembly includes a sealing ring 25 installed on the inner wall of the wire clamping cylinder 2 and a first clamping hoop 26 sleeved on the outside of the sealing ring 25. The sealing ring 25 is made of insulating rubber. The tail of the wire clamping cylinder 2 is rotatably installed with a first clamping screw 27. The first clamping screw 27 and a bidirectional screw 17 are both installed with first bevel teeth, and the two first bevel teeth are meshed with each other. The first clamping screw 27 is respectively provided with a second positive thread segment and a second reverse thread segment. The second positive thread segment and the second reverse thread segment are respectively connected to the two clamping parts of the first clamping hoop 26 in a transmission manner.

[0035] When the rotating drum 4 or the large gear ring 5 is driven, the first clamping screw 27 is set so that the first clamping hoop 26 can fully clamp the sealing ring 25. The clamping of the sealing ring 25 by the first clamping hoop 26 can effectively improve the sealing strength of the sealing ring 25 to the exposed copper end part on the one hand, and on the other hand, complete the tight and stable connection between the wire clamping drum 2 and the cable body 1.

[0036] The clamping hoop module includes a second clamping screw 28 and a clamping shaft 29 which are rotatably connected to the wire clamping barrel 2. A second bevel tooth is installed on the second clamping screw 28 and the clamping shaft 29. The two second bevel teeth are meshed with each other. A third gear 30 which is transmission-connected to the small gear ring 6 is fixedly installed on the tail end of the clamping shaft 29. A second clamping hoop 31 is sleeved on the copper sleeve 3. A third positive thread segment and a third reverse thread segment are respectively provided on the second clamping screw 28. The third positive thread segment and the third reverse thread segment are respectively transmission-connected to the two clamping parts of the second clamping hoop 31.

[0037] When the rotating drum 4 or the large gear ring 5 is driven, the second clamping hoop 31 clamps the copper sheath 3. After the second clamping hoop 31 clamps the copper sheath 3, on the one hand, it can further improve the clamping degree of the copper sheath 3 to the exposed copper end part, and on the other hand, it can complete the secondary connection and tightening of the wire clamping drum 2 and the cable body 1.

[0038] A copper column 7 electrically connected to the copper sleeve 3 is fixedly mounted on the clamping barrel 2, a conductive barrel 8 is slidably sleeved on the copper column 7, and a connecting plate 9 is mounted on the end of the conductive barrel 8; The clamping assembly includes a threaded head 10 fixed on a connecting plate 9 and a secondary locking mechanism, and a front ratchet 11 is rotatably mounted on the connecting plate 9, a threaded sleeve 12 is fixedly mounted on the other connecting plate 9, the threaded sleeve 12 is adaptively connected to the threaded head 10, and a group of transmission rods 13 are mounted on the front ratchet 11; The axis of the transmission rod 13 is parallel to the axis of the clamping cylinder 2; A synchronous rotating ring 14 is slidably connected to the threaded sleeve 12, and each transmission rod 13 is slidably connected to the synchronous rotating ring 14; The threaded sleeve 12 is provided with a group of transmission guide grooves 35 distributed in a circumferential array. A driven slider is installed inside the synchronous rotating ring 14 and at a position corresponding to each transmission guide groove 35. Each driven slider is slidably connected to the transmission guide groove 35 at the corresponding position.

[0039] By setting the transmission guide groove 35 and the driven slider, the threaded sleeve 12 and the synchronous rotating ring 14 rotate synchronously, and then the rotating direction of the synchronous rotating ring 14 is limited.

[0040] A limit spring 37 is installed between the connecting plate 9 and the clamping cylinder 2 , and a corrugated rubber sleeve 36 is installed between the connecting plate 9 and the clamping cylinder 2 . The corrugated rubber sleeve 36 is sleeved on the outer side of the limit spring 37 .

[0041] The primary locking mechanism includes a rear ratchet 32 ​​installed in the rotating drum 4 and a first locking claw 33 hinged to the tail of the wire clamping cylinder 2. The secondary locking mechanism includes a second locking claw 34. The second locking claw 34 is hinged to a connecting plate 9 installed adjacent to the front ratchet 11. Torsion springs are provided at the hinges between the first locking claw 33 and the wire clamping cylinder 2 and the hinges between the second locking claw 34 and the connecting plate 9.

[0042] When in use, the first locking claw 33 and the second locking claw 34 are arranged so that the drum 4 and the threaded sleeve 12 can only rotate in one direction when there is no external force, thereby ensuring the connection strength of the two connecting mechanisms and preventing the two connecting mechanisms from being separated by mistake.

[0043] A method for assembling a low-voltage power cable assembly comprises the following steps: SS01, preset, when it is necessary to connect two segmented cable bodies 1 into one, firstly, the connection ends of the two segmented cable bodies 1 are stripped, and after the stripping, the copper cores of the two ends of the cable body 1 are exposed; SS02, clamping, after step SS01, a connecting mechanism is respectively installed on the leaked copper core parts of the two ends of the cable body 1. After the connecting mechanism is installed, the copper sheath 3 can finally complete the clamping and sealing of the leaked copper core; SS03, fixation, after step SS02, the two connection mechanisms are connected as one through the threaded connection between the threaded head 10 and the threaded sleeve 12 to achieve electrical conduction. After the two connection mechanisms are connected as one, the assembly of the cable assembly is completed.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low voltage power cable assembly, comprising a cable body (1), characterized in that: The middle part of the cable body (1) is provided with two symmetrically arranged connecting mechanisms, and the two connecting mechanisms are clamped together by a clamping assembly; The connecting mechanism comprises a wire clamping barrel (2), wherein a sealing assembly and a copper sleeve (3) are sequentially installed inside the wire clamping barrel (2) from the back to the front, an air chamber (15) is arranged between the copper sleeve (3) and the wire clamping barrel (2), a rotating barrel (4) is rotatably sleeved on the wire clamping barrel (2), a primary locking mechanism for limiting the position of the rotating barrel (4) is arranged at the tail of the wire clamping barrel (2), a large gear ring (5) and a small gear ring (6) are respectively installed on the rotating barrel (4), a group of clamping modules, a group of air clamping modules and a clamping hoop module driven by the small gear ring (6) are arranged in the air chamber (15), the clamping modules, the air clamping modules and the clamping hoop module are all used to adjust the inner diameter of the copper sleeve (3), a copper column (7) electrically connected to the copper sleeve (3) is fixedly installed on the wire clamping barrel (2), a conductive cylinder (8) is slidably sleeved on the copper column (7), and a connecting plate (9) is installed at the end of the conductive cylinder (8); The clamping assembly comprises a threaded head (10) fixed on a connecting plate (9) and a secondary locking mechanism, wherein a front ratchet (11) is rotatably mounted on the connecting plate (9), a threaded sleeve (12) is fixedly mounted on the other connecting plate (9), the threaded sleeve (12) is adaptively connected to the threaded head (10), a group of transmission rods (13) are mounted on the front ratchet (11), a synchronous rotating ring (14) is slidably connected to the threaded sleeve (12), and each transmission rod (13) is slidably connected to the synchronous rotating ring (14).

2. A low voltage power cable assembly according to claim 1, characterized in that: Each of the clamping modules comprises a clamp (16) slidably connected to the wire clamping barrel (2) and a bidirectional screw rod (17) rotatably connected to the wire clamping barrel (2); a first gear (18) which is transmission-connected to the large gear ring (5) is fixedly mounted on the tail end of the bidirectional screw rod (17); a first positive thread segment and a first negative thread segment are respectively arranged on the bidirectional screw rod (17); a driving block (19) is transmission-mounted on the first positive thread segment and the first negative thread segment; and a connecting arm (20) is hingedly connected between the two driving blocks (19) and the clamp (16).

3. A low voltage power cable assembly according to claim 1, characterized in that: The air clamp module comprises an air box (21) installed in the air chamber (15), the air outlet end of the air box (21) is connected to the air chamber (15), a piston plate (22) is slidably mounted on the inner wall of the air box (21), a one-way screw rod (23) is rotatably mounted on the wire clamp cylinder (2), a second gear (24) which is transmission-connected to the large gear ring (5) is fixedly mounted on the rear end of the one-way screw rod (23), and the one-way screw rod (23) is transmission-connected to the piston plate (22).

4. A low voltage power cable assembly according to claim 2, characterized in that: The sealing assembly comprises a sealing ring (25) mounted on the inner wall of the wire clamping cylinder (2) and a first clamping hoop (26) sleeved on the outer side of the sealing ring (25); the sealing ring (25) is made of insulating rubber; a first clamping screw (27) is rotatably mounted on the tail of the wire clamping cylinder (2); first bevel teeth are mounted on the first clamping screw (27) and the bidirectional screw (17); the two first bevel teeth are meshed with each other; a second positive thread segment and a second negative thread segment are respectively arranged on the first clamping screw (27); the second positive thread segment and the second negative thread segment are respectively transmission-connected to the two clamping parts of the first clamping hoop (26).

5. A low voltage power cable assembly according to claim 1, characterized in that: The clamping hoop module comprises a second clamping screw (28) and a clamping shaft (29) which are rotatably connected to the clamping barrel (2); the second clamping screw (28) and the clamping shaft (29) are both provided with a second bevel tooth, and the two second bevel teeth are meshed with each other; a third gear (30) which is transmission-connected to a small gear ring (6) is fixedly installed at the rear end of the clamping shaft (29); a second clamping hoop (31) is sleeved on the copper sleeve (3); a third positive thread segment and a third negative thread segment are respectively provided on the second clamping screw (28); the third positive thread segment and the third negative thread segment are respectively transmission-connected to two clamping parts of the second clamping hoop (31).

6. A low voltage power cable assembly according to claim 1, characterized in that: The primary locking mechanism comprises a rear ratchet (32) mounted in the rotating drum (4) and a first locking claw (33) hinged to the rear end of the clamping drum (2); the secondary locking mechanism comprises a second locking claw (34), the second locking claw (34) being hinged to a connecting plate (9) mounted adjacent to the front ratchet (11); a hinged joint between the first locking claw (33) and the clamping drum (2) and a hinged joint between the second locking claw (34) and the connecting plate (9) are both provided with torsion springs.

7. A low voltage power cable assembly according to claim 1, characterized in that: The threaded sleeve (12) is provided with a group of transmission guide grooves (35) distributed in a circumferential array. A driven slider is installed inside the synchronous rotating ring (14) and at a position corresponding to each transmission guide groove (35). Each driven slider is slidably connected to the transmission guide groove (35) at a corresponding position. The axis of the transmission rod (13) is parallel to the axis of the wire clamping cylinder (2).

8. A low voltage power cable assembly according to claim 1, characterized in that: A corrugated rubber sleeve (36) is installed between the connecting plate (9) and the wire clamping cylinder (2), a limit spring (37) is installed between the connecting plate (9) and the wire clamping cylinder (2), and the corrugated rubber sleeve (36) is sleeved on the outside of the limit spring (37).

9. A low voltage power cable assembly according to claim 4, characterized in that: The copper sleeve (3) is made of soft copper and is a hollow cylindrical structure with an open tail end. The copper sleeve (3) has a thickness of 1 mm to 3 mm.

10. A method for assembling a low-voltage power cable assembly, based on the low-voltage power cable assembly according to any one of claims 1 to 9, characterized in that: The following steps are involved: SS01, preset, when it is necessary to connect two segmented cable bodies (1) into one, firstly, the connection ends of the two segmented cable bodies (1) are stripped, and after the stripping, the copper cores of the two ends of the cable body (1) are exposed; SS02, clamping, after step SS01, a connection mechanism is respectively installed on the leaking copper core parts of the two ends of the cable body (1). After the connection mechanism is installed, the copper sheath (3) can finally complete the clamping and sealing of the leaking copper core; SS03, fixation, after step SS02, the two connection mechanisms are connected as one through the threaded connection between the threaded head (10) and the threaded sleeve (12) to achieve electrical conduction. After the two connection mechanisms are connected as one, the assembly of the cable assembly is completed.

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