A low-voltage power cable assembly and an assembly method for the cable assembly

Abstract

The present invention relates to the technical field of cable assemblies, and specifically to a low-voltage power cable assembly and an assembly method thereof. The cable assembly includes a cable body, and two symmetrically arranged connecting mechanisms are provided in the middle of the cable body. The two connecting mechanisms are clamped by a clamping assembly. The connecting mechanism includes a wire clamping cylinder, and a sealing assembly and a copper sleeve are sequentially installed in the wire clamping cylinder from back to front. An air chamber is provided between the copper sleeve and the wire clamping cylinder. A rotating cylinder is rotatably sleeved on the wire clamping cylinder, and a primary locking mechanism for limiting the rotating cylinder is provided at the tail of the wire clamping cylinder. The beneficial effects of the present invention are as follows: The present invention adopts a multi-module collaborative adjustment structure, innovatively sets a clamping module, an air clamping module, and a hoop module, and collaboratively adjusts the inner diameter of the copper sleeve through different mechanical transmission methods to achieve stable clamping of the copper core of the cable. Compared with the traditional single clamping method, the clamping effect is better and the connection is more stable.

Description

Technical Field

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

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

[0003] Traditional low-voltage cable connections mostly adopt crimping or threaded locking structures. For example, the patent with the publication number CN220754327U discloses a quick-connection cable joint, which improves the waterproof performance through the cooperation of a threaded block and a closed block. However, such structures still have significant defects in actual applications:

[0004] Insufficient mechanical stability: A single clamping method (such as threaded compression or one-way hoop) is prone to looseness under vibration or external forces, resulting in an increase in contact resistance and even the risk of power failure, especially in environments with high humidity and large temperature differences;

[0005] Single sealing structure: Existing sealing designs mostly rely on the static compression of rubber rings and lack a dynamic pressure compensation mechanism. After long-term use, it is easy to cause sealing failure due to material aging or deformation, and it is difficult to meet the requirements of complex outdoor working conditions;

[0006] Lack of modular coordination: Each functional module of traditional joints (such as conduction, sealing, and locking) operates independently and lacks a linkage adjustment mechanism. During installation, it is necessary to operate step by step, with low efficiency and it is difficult to ensure the balance of multi-dimensional clamping forces.

[0007] Based on this, the present invention provides a low-voltage power cable assembly and an assembly method thereof to solve the problems raised in the above background art. Summary of the Invention

[0008] 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 thereof to solve the problems that the cable assembly is unstable in connection, poor in sealing effect, inconvenient in installation, prone to connection failure due to external forces, and unable to work in multi-module coordination when in use.

[0009] The technical solution of the present invention to solve the above technical problems is as follows: A low-voltage power cable assembly includes a cable body, and two symmetrically arranged connection mechanisms are provided in the middle of the cable body, and the two connection mechanisms are clamped by a clamping assembly;

[0010] The connecting mechanism includes a wire clamping cylinder. Inside the wire clamping cylinder, a sealing component and a copper sleeve are successively installed from the rear to the front. An air chamber is provided between the copper sleeve and the wire clamping cylinder. A rotating cylinder is rotatably sleeved on the wire clamping cylinder. At the tail of the wire clamping cylinder, there is a primary locking mechanism for limiting the rotating cylinder. A large gear ring and a small gear ring are respectively installed on the rotating cylinder. Inside the air chamber, there is a set of clamping modules, a set of air clamping modules, and a hoop module driven by the small gear ring. The clamping modules, air clamping modules, and 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. A connecting plate is installed at the end of the conductive cylinder;

[0011] The clamping and connecting component includes a threaded head fixed on a connecting plate and a secondary locking mechanism. A front ratchet is rotatably installed on the connecting plate. A threaded sleeve is fixedly installed on the other connecting plate. The threaded sleeve is adaptively connected to the threaded head. A set of transmission rods are installed on the front ratchet. A synchronous rotating ring is slidably connected to the threaded sleeve. Each transmission rod is slidably connected to the synchronous rotating ring.

[0012] Based on the above technical solutions, the present invention can be further improved as follows.

[0013] Furthermore, each of the clamping modules includes a clamp slidably connected inside the wire clamping cylinder and a bidirectional lead screw rotatably connected to the wire clamping cylinder. A first gear drivingly connected to the large gear ring is fixedly installed at the tail end of the bidirectional lead screw. A first right-handed thread section and a first left-handed thread section are respectively provided on the bidirectional lead screw. A driving block is drivingly installed on each of the first right-handed thread section and the first left-handed thread section. A connecting arm is hinged between each of the two driving blocks and the clamp.

[0014] The beneficial effect of adopting the above further solution is that when the rotating cylinder or the large gear ring is driven, due to the setting of the bidirectional lead screw, the two driving blocks can move synchronously and approach each other. After the two driving blocks move synchronously and approach each other, the distance between the clamp and the copper sleeve is reduced. By controlling the number of rotation turns of the bidirectional lead screw, the pressing and clamping strength of the clamp on the copper sleeve can be adjusted. Through the synchronous clamping setting of the clamps in multiple clamping modules, the inner diameter of the copper sleeve is finally changed. After the inner diameter of the copper sleeve is changed, the exposed copper end part of the cable body is effectively wrapped and clamped.

[0015] Furthermore, the air clamping module includes an air blowing box installed inside the air chamber. The air outlet end of the air blowing box is communicated with the air chamber. A piston plate is slidably installed on the inner wall of the air blowing box. A unidirectional lead screw is rotatably installed on the wire clamping cylinder. A second gear drivingly connected to the large gear ring is fixedly installed at the tail end of the unidirectional lead screw. The unidirectional lead screw is drivingly connected to the piston plate.

[0016] The beneficial effects of adopting the above further scheme are as follows. After the rotary drum or the large gear ring is driven, the unidirectional lead screw rotates. After the unidirectional lead screw rotates, it drives 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, it drives the copper sleeve to tightly wrap the exposed copper end part of the cable body, and finally reduces the gap rate between the copper sleeve and the exposed copper end part.

[0017] The sealing assembly includes a sealing ring installed on the inner wall of the wire clamping cylinder and a first hoop sleeved outside the sealing ring. The sealing ring is made of insulating rubber. A first tightening lead screw is rotatably installed at the tail of the wire clamping cylinder. First bevel gears are installed on both the first tightening lead screw and a bidirectional lead screw, and the two first bevel gears mesh with each other. A second right-handed thread section and a second left-handed thread section are respectively arranged on the first tightening lead screw, and the second right-handed thread section and the second left-handed thread section are respectively in transmission connection with the two tightening parts of the first hoop.

[0018] The beneficial effects of adopting the above further scheme are as follows. After the rotary drum or the large gear ring is driven, due to the setting of the first tightening lead screw, the first hoop tightly holds the sealing ring. By the first hoop tightly holding the sealing ring, on the one hand, it can effectively improve the sealing strength of the sealing ring for the exposed copper end part, and on the other hand, it can complete the tight and stable connection between the wire clamping cylinder and the cable body.

[0019] Furthermore, the hoop module includes a second tightening lead screw rotatably connected to the wire clamping cylinder and a clamping shaft. Second bevel gears are installed on both the second tightening lead screw and the clamping shaft, and the two second bevel gears mesh with each other. A third gear in transmission connection with the small gear ring is fixedly installed at the tail end of the clamping shaft. A second hoop is sleeved on the copper sleeve. A third right-handed thread section and a third left-handed thread section are respectively arranged on the second tightening lead screw, and the third right-handed thread section and the third left-handed thread section are respectively in transmission connection with the two tightening parts of the second hoop.

[0020] The beneficial effects of adopting the above further scheme are as follows. After the rotary drum or the large gear ring is driven, the second hoop tightly holds the copper sleeve. After the second hoop tightly holds the copper sleeve, on the one hand, it can further improve the holding degree of the copper sleeve for the exposed copper end part, and on the other hand, it can complete the secondary connection fastening between the wire clamping cylinder and the cable body.

[0021] Furthermore, the primary locking mechanism includes a rear ratchet installed in the rotary drum and a first locking claw hinged to the tail of the wire clamping cylinder. The secondary locking mechanism includes a second locking claw, and the second locking claw is hinged to a connecting plate adjacent to the front ratchet. Torsion springs are arranged at the hinge joints of the first locking claw with the wire clamping cylinder and the hinge joints of the second locking claw with the connecting plate.

[0022] The beneficial effect of adopting the above further solution is that during use, through the settings of the first locking claw and the second locking claw, the rotating cylinder and the threaded sleeve can only rotate in one direction without external force, thereby ensuring the connection strength of the two connecting mechanisms and preventing the two connecting mechanisms from being accidentally separated.

[0023] Further, a group of transmission guide grooves distributed in a circumferential array are formed on the threaded sleeve, and a driven slider is installed inside the synchronous rotating ring at a position corresponding to 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.

[0024] The beneficial effect of adopting the above further solution is that through the settings of the transmission guide grooves and the driven sliders, the threaded sleeve and the synchronous rotating ring rotate synchronously, thereby limiting the rotation direction of the synchronous rotating ring.

[0025] Further, a corrugated rubber sleeve is installed between the connecting plate and the wire clamping cylinder, and a limiting spring is installed between the connecting plate and the wire clamping cylinder. The corrugated rubber sleeve is sleeved outside the limiting spring.

[0026] Further, the copper-clad sleeve is made of soft copper, the copper-clad sleeve is a hollow cylindrical structure with an open end at the tail, and the thickness of the copper-clad sleeve is 1 mm - 3 mm.

[0027] The beneficial effect of adopting the above further solution is that an assembly method of a low-voltage power cable assembly includes the following steps:

[0028] SS01. Presetting, when it is necessary to connect two segmented cable bodies into one, first strip the connection ends of the two segmented cable bodies. After the stripping process, the copper cores at the two ends of the cable body are exposed;

[0029] SS02. Clamping, after step SS01, a connecting mechanism is respectively installed on the exposed copper core parts at the two ends of the cable body. After the connecting mechanism is installed, finally the copper-clad sleeve can complete the clamping and sealing of the exposed copper core;

[0030] SS03. Fixing, after step SS02, through the threaded connection between the threaded head and the threaded sleeve, the two connecting mechanisms are connected into one body and electrical conduction is achieved. After the two connecting mechanisms are connected into one body, the assembly of the cable assembly is completed.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention adopts a multi-module cooperative adjustment structure, innovatively sets a clamping module, a pneumatic clamping module and a hoop module, and cooperatively adjusts the inner diameter of the copper-clad sleeve through different mechanical transmission methods to achieve 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.

[0033] 2. The present invention adopts a dual 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 without external force, effectively preventing the accidental separation of the two connecting mechanisms and enhancing the connection strength and reliability of the cable assembly.

[0034] 3. The present invention is provided with a strengthened sealing structure. The sealing assembly not only has an insulating rubber sealing ring, but also drives the first hoop to tightly hold the sealing ring through the first tightening screw rod, 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.

[0035] 4. The present invention adopts a convenient connection and installation method. Through the design of the clamping assembly, the cooperation of the threaded head and the threaded sleeve, and the setting of the synchronous rotating ring and the transmission rod, the rapid connection and electrical conduction of the two connecting mechanisms are realized, simplifying the installation process and improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the overall structure of a low-voltage power cable assembly of the present invention;

[0037] Figure 2 of the present invention Figure 1 is a partially enlarged schematic diagram of the structure at A in;

[0038] Figure 3 is a schematic diagram of the structure of the rotating cylinder and the corrugated rubber sleeve of the present invention;

[0039] Figure 4 of the present invention Figure 3 is a partially enlarged schematic diagram of the structure at B in;

[0040] Figure 5 is a sectional schematic diagram of the copper column and the air chamber of the present invention;

[0041] Figure 6 of the present invention Figure 5 is a partially enlarged schematic diagram of the structure at C in;

[0042] Figure 7 is a schematic diagram of the structure of the wire clamping cylinder and the air charging box of the present invention;

[0043] Figure 8 is a schematic diagram of the structure of the copper clad sleeve and the first locking claw of the present invention;

[0044] Figure 9 of the present invention Figure 8 is a partially enlarged schematic diagram of the structure at D in;

[0045] Figure 10 is a schematic diagram of the structure of the copper clad sleeve and the second hoop of the present invention;

[0046] Figure 11 This is a schematic structural diagram of the first gear and the clamp of the present invention;

[0047] Figure 12 This is a schematic structural diagram of the air injection box of the present invention.

[0048] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0049] 1. Cable body; 2. Wire clamping cylinder; 3. Copper sleeve; 4. Rotating cylinder; 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 lead screw; 18. First gear; 19. Driving block; 20. Connecting arm; 21. Air injection box; 22. Piston plate; 23. Unidirectional lead screw; 24. Second gear; 25. Sealing ring; 26. First hoop; 27. First tightening lead screw; 28. Second tightening lead screw; 29. Clamping shaft; 30. Third gear; 31. Second hoop; 32. Rear ratchet; 33. First locking claw; 34. Second locking claw; 35. Transmission guide groove; 36. Corrugated rubber sleeve; 37. Limiting spring. Detailed implementation manners

[0050] The principles and features of the present invention will be described below in conjunction with the attached drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0051] As Figure 1-12 shown, a low-voltage power cable assembly includes a cable body 1. The cable body 1 is a low-voltage cable. Two symmetrically arranged connecting mechanisms are provided in the middle of the cable body 1, and the two connecting mechanisms are clamped by a clamping assembly;

[0052] The connecting mechanism includes a wire clamping cylinder 2. A sealing assembly and a copper sleeve 3 are sequentially installed inside the wire clamping cylinder 2 from the rear to the front. An air chamber 15 is provided between the copper sleeve 3 and the wire clamping cylinder 2;

[0053] The copper sleeve 3 is made of soft copper. The copper sleeve 3 is a hollow cylindrical structure with an open end at the tail, and the thickness of the copper sleeve 3 is 2 mm;

[0054] A rotating cylinder 4 is rotatably sleeved on the wire clamping cylinder 2. A primary locking mechanism for limiting the rotating cylinder 4 is provided at the tail of the wire clamping cylinder 2. A large gear ring 5 and a small gear ring 6 are respectively installed on the rotating cylinder 4. A set of clamping modules, a set of air clamping modules, and a hoop module driven by the small gear ring 6 are provided in the air chamber 15. The clamping modules, the air clamping modules, and the hoop module are all used for adjusting the inner diameter of the copper sleeve 3;

[0055] Each clamping module includes a clamp 16 slidably connected inside the wire clamping cylinder 2 and a bidirectional lead screw 17 rotatably connected to the wire clamping cylinder 2. A first gear 18 drivingly connected to the large gear ring 5 is fixedly installed at the tail end of the bidirectional lead screw 17. A first right-handed thread section and a first left-handed thread section are respectively provided on the bidirectional lead screw 17. A driving block 19 is drivingly installed on each of the first right-handed thread section and the first left-handed thread section. A connecting arm 20 is hinged between each of the two driving blocks 19 and the clamp 16.

[0056] When the rotating cylinder 4 or the large gear ring 5 is driven, due to the arrangement of the bidirectional lead screw 17, the two driving blocks 19 can move synchronously closer to each other. After the two driving blocks 19 move synchronously closer to each other, the distance between the clamp 16 and the copper sleeve 3 is then reduced. By controlling the number of rotation turns of the bidirectional lead screw 17, the pressing and clamping strength of the pressing clamp on the copper sleeve 3 can be adjusted. Through the synchronous clamping arrangement of the clamps 16 in multiple clamping modules, the inner diameter of the copper sleeve 3 is finally changed. After the inner diameter of the copper sleeve 3 is changed, the exposed copper end part of the cable body 1 is effectively wrapped and clamped.

[0057] The air clamping module includes an air blowing box 21 installed inside the air chamber 15. The air outlet end of the air blowing box 21 is communicated with the air chamber 15. A piston plate 22 is slidably installed on the inner wall of the air blowing box 21. A unidirectional lead screw 23 is rotatably installed on the wire clamping cylinder 2. A second gear 24 drivingly connected to the large gear ring 5 is fixedly installed at the tail end of the unidirectional lead screw 23. The unidirectional lead screw 23 is drivingly connected to the piston plate 22.

[0058] When the rotating cylinder 4 or the large gear ring 5 is driven, the unidirectional lead screw 23 rotates. After the unidirectional lead screw 23 rotates, the piston plate 22 is driven 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 is changed, the internal pressure of the air chamber 15 is increased. After the internal pressure of the air chamber 15 is increased, the copper sleeve 3 is driven to tightly wrap the exposed copper end part of the cable body 1, and finally the gap rate between the copper sleeve 3 and the exposed copper end part is reduced.

[0059] The sealing assembly includes a sealing ring 25 installed on the inner wall of the wire clamping cylinder 2 and a first hoop 26 sleeved outside the sealing ring 25. The sealing ring 25 is made of insulating rubber. A first tightening lead screw 27 is rotatably installed at the tail of the wire clamping cylinder 2. First bevel gears are installed on both the first tightening lead screw 27 and the bidirectional lead screw 17, and the two first bevel gears mesh with each other. A second right-handed thread section and a second left-handed thread section are respectively provided on the first tightening lead screw 27, and the second right-handed thread section and the second left-handed thread section are respectively drivingly connected to the two tightening parts of the first hoop 26.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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;

[0064] 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;

[0065] The axis of the transmission rod 13 is parallel to the axis of the clamping cylinder 2;

[0066] 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;

[0067] 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.

[0068] 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.

[0069] A limiting spring 37 is installed between the connecting plate 9 and the wire clamping cylinder 2, and a corrugated rubber sleeve 36 is installed between the connecting plate 9 and the wire clamping cylinder 2. The corrugated rubber sleeve 36 is sleeved outside the limiting spring 37.

[0070] The primary locking mechanism includes a rear ratchet wheel 32 installed in the rotating cylinder 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, and the second locking claw 34 is hinged to a connecting plate 9 arranged adjacent to the front ratchet wheel 11. Torsion springs are provided at the hinged joints of the first locking claw 33 and the wire clamping cylinder 2 and the hinged joint of the second locking claw 34 and the connecting plate 9.

[0071] During use, due to the settings of the first locking claw 33 and the second locking claw 34, the rotating cylinder 4 and the threaded sleeve 12 can only rotate in one direction without external force, thereby ensuring the connection strength of the two connecting mechanisms and preventing the two connecting mechanisms from being accidentally separated.

[0072] An assembly method for a low-voltage power cable assembly includes the following steps:

[0073] SS01. Presetting: When it is necessary to connect two segmented cable bodies 1 into one body, first perform wire stripping on the connection ends of the two segmented cable bodies 1. After the wire stripping process, the copper cores at the two ends of the cable body 1 are exposed.

[0074] SS02. Clamping: After step SS01, a connecting mechanism is respectively installed on the exposed copper core parts at the two ends of the cable body 1. After the connecting mechanism is installed, finally, the copper sheath 3 can complete the clamping and sealing of the exposed copper core.

[0075] SS03. Fixing: After step SS02, through the threaded connection between the threaded head 10 and the threaded sleeve 12, the two connecting mechanisms are connected into one body and electrical conduction is achieved. After the two connecting mechanisms are connected into one body, the assembly of the cable assembly is completed.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation of the present invention.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0078] The foregoing are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within 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); 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); 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 clamp cylinder (2), a second gear (24) which is transmission-connected to the large gear ring (5) is fixedly mounted 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); 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).

2. A low voltage power cable assembly according to claim 1, 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).

3. 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.

4. 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).

5. 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).

6. A low voltage power cable assembly according to claim 1, 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.

7. 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 6, 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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