Copper-clad aluminum stranded wire device

Abstract

The invention discloses a copper-clad aluminum stranded wire device, and relates to the technical field of copper-clad aluminum wire processing, the copper-clad aluminum stranded wire device comprises a stranded wire disc, a plurality of pay-off wheels are arranged on the back face of the stranded wire disc at equal angles, wire harnesses are wound on the surfaces of the pay-off wheels, and the copper-clad aluminum stranded wire device further comprises scroll metal strips which are installed on the back face of the stranded wire disc and correspond to the pay-off wheels one to one. The scroll metal strips can be automatically wound or expanded according to the tension change of the wire harness so as to dynamically adjust the tension of the wire harness, one side of each scroll metal strip is provided with a traction ball, and the traction ball can adaptively adjust the position of the traction ball according to the real-time tension of the wire harness so as to change the travel path of the wire harness from the pay-off wheel to the wire twisting disc; through the scroll metal strip capable of expanding and shrinking automatically and the traction ball capable of moving dynamically, stable adjustment and emergency buffering of the tension of the wire harness, stable control when the tension guided by the scroll metal strip is gradually changed, and quick response when the tension guided by the traction ball is suddenly changed are respectively achieved, overall collaborative operation is achieved, and the stranding quality of the wire harness is ensured.

Description

Technical Field

[0001] This invention relates to the field of copper-clad aluminum wire processing technology, specifically to a copper-clad aluminum stranded wire device. Background Technology

[0002] Copper-clad aluminum wire, as a composite wire that combines the excellent conductivity of copper with the lightweight and low-cost advantages of aluminum, is widely used in power transmission, communication cables, electronic equipment and other fields. The core of its processing is to twist multiple copper-clad aluminum single wires together at a specific pitch to form a stranded wire with stable structure and uniform performance.

[0003] The main structure of existing copper-clad aluminum stranded wire devices consists of the following components: Cable feeder: Used to place and stably release single wires, it is generally composed of multiple independent cable feed reels for parallel cable feeding of multiple single wires; Tension control device: magnetic powder brake or electronic tension controller: adjusts the tension of a single wire to ensure uniform tension in each strand; Guide wheel assembly: A combination of multiple guide wheels to constrain and guide the wire, preventing it from deviating; The surface of the strand reel has holes corresponding to the number of wire feed reels, allowing single wires to pass through and converge and twist together; Take-up roller: neatly winds the finished copper-clad aluminum stranded wire into a coil; The material properties of copper-clad aluminum wire (low strength of the aluminum core and susceptibility to scratches in the copper layer) place extremely high demands on the stability of the stranding tension. Precise control of the wire tension is a key factor in ensuring product quality, welding stability, uniform coating, and production continuity. Currently, the dynamic changes in the winding position of the wire on the pay-off reel are caused by the wire reciprocating along the axis of the pay-off reel in order to cover the entire pay-off reel. This results in the wire pay-off end dynamically changing from bottom to top during the pay-off process. The wire pay-off end on the pay-off reel moves along the axis of the pay-off reel due to the axial reciprocating winding during the winding process, while the take-up end of the take-up device is fixed in position. The straight-line distance between the two will show a periodic reciprocating change. The wire will stretch or contract as the distance between its two ends changes. When the distance is too far and the tension is too high, the wire will be overstretched, which may lead to excessively high local density during twisting. Similarly, when the distance is close and the tension is too low, the wire will be loose and the local density will be low after twisting. The final product cross-section will be uneven, which will affect the overall quality of the product. In addition, when the wire wound on the surface of the pay-off reel becomes disordered, some wire is not tensioned and is in a loose state when wound. When released, it may suddenly spring back, causing the amount of wire released in a short period of time to far exceed the need for take-up. The speed increases sharply, the tension of the wire bundle drops sharply, and the wire becomes excessively loose. The loose wire will shake during the twisting process. The effective length of the wire actually participating in the twisting within the twisting pitch suddenly becomes longer. The twisted wire is excessively loose and bulges appear.

[0004] To address the aforementioned issues, there is an urgent need for innovative designs based on existing stranding devices. Summary of the Invention

[0005] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide a copper-clad aluminum stranded wire device to solve the problems mentioned in the background section, such as unstable spacing between the pay-off and take-up ends of existing stranded wire devices, uneven cross-section caused by tension fluctuations in the wire, and bulging caused by winding disorder leading to a sudden drop in tension.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a copper-clad aluminum stranded wire device, including a stranding reel, and a plurality of wire feeding wheels are arranged at equal angles on the back of the stranding reel. The surface of each wire feeding wheel is wound with a wire bundle. The device also includes a spiral metal strip installed on the back of the stranding reel and corresponding to each wire feeding wheel. The spiral metal strip can automatically rewind or unwind according to the tension change of the wire bundle to dynamically adjust the tension of the wire bundle. Each of the spiral metal strips is provided with a traction ball on one side, and the traction ball can adaptively adjust its position according to the real-time tension of the wire harness to change the travel path of the wire harness from the feed wheel to the stranding reel.

[0007] Preferably, the back of the stranding reel is fixedly connected to an installation shaft, and holes are provided on the surface of the stranding reel corresponding to the position of the wire bundle. After the wire bundle is led out from the pay-off wheel, it passes through the corresponding spiral metal strip and traction ball in sequence, and then passes through the holes of the stranding reel. Limiting pulleys and guide pulleys are respectively installed on the back of the stranding reel corresponding to the position of the pay-off wheel.

[0008] Preferably, the inner wall of the spiral metal strip is fixedly connected to a rotating shaft, and the two ends of the rotating shaft are rotatably connected to limit sleeves, and the limit sleeves are fixedly connected to the mounting shaft. The spiral metal strip and the rotating shaft are both located inside the limit sleeves, and a number of equidistant auxiliary rollers are rotatably connected to the surface of the spiral metal strip.

[0009] Preferably, the traction ball has a through groove inside for the wire harness to pass through, and ball bearings are installed at both ends of the traction ball corresponding to the positions of the through groove; A swing arm is fixedly connected to the outer wall of the traction ball. A turntable is fixedly connected to one end of the swing arm, and a ratchet is fixedly connected to one side of the turntable. A carrier plate is rotatably connected to the other side of the turntable, and the carrier plate is fixedly connected to the mounting shaft.

[0010] Preferably, the outer wall of the turntable is wound with an elastic rope, one end of which is fixedly connected to the turntable and the other end of which is fixedly connected to the carrier plate. The turntable rotates to drive the swing arm to swing, accompanied by the stretching of the elastic rope.

[0011] Preferably, a slide rod is slidably connected to the surface of the carrier plate, a slider is slidably connected to one end of the slide rod, and a pawl is rotatably connected to one side of the slider.

[0012] Preferably, the inner wall of the rotating shaft is slidably connected to an extension rod, and the surface of the extension rod is provided with a spiral groove. The inner wall of the rotating shaft is welded with protrusions that slide along the spiral groove.

[0013] Preferably, one end of the extension rod is provided with a first sealing tube, one end of the first sealing tube is connected to a second sealing tube through a flexible tube, the inner walls of the first sealing tube and the second sealing tube are slidably connected with sealing plugs, and a return spring is fixedly connected to one side of the sealing plug, and a push-pull rod is fixedly connected to the other side of the sealing plug.

[0014] Preferably, the push-pull rod located in the first sealing tube is fixedly connected to the extension rod, the push-pull rod located in the second sealing tube is rotatably connected to the pawl, the first sealing tube is fixedly connected to the limiting sleeve, the second sealing tube is fixedly connected to the carrier plate, and both the first sealing tube and the second sealing tube are filled with hydraulic oil.

[0015] Preferably, a gear ring is fixedly connected to the outer wall of the strand reel, and two small gears mesh on both sides of the gear ring, with the output shaft of a servo motor installed on one side of one of the small gears.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The spiral metal strip can automatically wind up or unwind according to the tension changes of the wire harness, realizing a dynamic response to tension. When the tension of the wire harness is stable, the spiral metal strip automatically winds up and unwinds, which can respond to the tension changes of the wire harness in real time. When the tension is too high, it winds up to buffer; when the tension is too low, it unwinds to tighten. This effectively solves the problem of inconsistent tension in traditional stranded wires, ensuring that the stranding process is always in a stable tension state. This further ensures that the cross-section of the wire harness is more uniform after stranding, and avoids the wire harness from being overstretched and breaking or loosening. In addition, a traction ball that can sense the amplitude of wire harness tension fluctuations is added. The traction ball adaptively changes its position according to the real-time tension. When the wire harness is suddenly released too quickly by the wire release wheel, causing the wire harness to become too long and loose, the traction ball can physically absorb the excess loose wire harness by extending its travel path. This provides a temporary buffer path for the suddenly long wire harness, preventing the loose wire harness from getting tangled, knotted or piled up during the twisting process. This avoids the wire harness shaking caused by looseness in traditional devices, further avoids bulging, and ensures that the twisting structure is neat. Furthermore, the spiral metal strip and the pawl are connected by two sealing tubes respectively. When the harness is too loose, the spiral metal strip rotates and expands, causing the shaft to rotate and further driving the extension rod to slide outward axially. This pushes the hydraulic oil in the first sealing tube to transfer, further driving the pawl to move axially and engage with the ratchet. This allows the elastic rope to automatically lock and position itself during the rebound process, further ensuring that the traction ball and the harness are in a unidirectional movement state during dynamic displacement, preventing the traction ball from being pulled and shaken by the harness again. Finally, it can be reset by its own return spring, driving the push-pull rod to pull the pawl to slide in the opposite direction, disengaging from the ratchet. The overall structure will gradually return to its initial shape as the tension of the harness stabilizes. In addition, a slide bar and a slider are added between the pawl and the ratchet. When the pawl impacts the tooth surface of the ratchet during the process of the pawl engaging with the ratchet tooth groove, the slider can slide outward along the slide bar to provide buffer space for the pawl until the pawl is successfully engaged in the tooth groove, reducing component wear and extending component life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the present invention from another angle.

[0019] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Figure 4 This is a schematic diagram of the wire harness travel path structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the traction ball swinging and pulling the wire harness to move synchronously.

[0022] Figure 6 This is a schematic diagram of the connection structure between the turntable and the elastic rope of the present invention.

[0023] Figure 7 This is a schematic diagram of the connection structure between the pawl and the slider of the present invention.

[0024] Figure 8This is a schematic diagram of the connection structure between the first sealing tube, the second sealing tube, and the rotating shaft of the present invention.

[0025] Figure 9 This is a cross-sectional view of the first sealing tube, the second sealing tube, and the rotating shaft of the present invention.

[0026] In the diagram: 1. Strand reel; 2. Pay-off reel; 3. Wire harness; 4. Spiral metal strip; 5. Traction ball; 6. Mounting shaft; 7. Rotating shaft; 8. Limiting sleeve; 9. Auxiliary roller shaft; 10. Swing rod; 11. Turntable; 12. Ratchet; 13. Carrier plate; 14. Elastic rope; 15. Sliding rod; 16. Sliding block; 17. Pawl; 18. Extension rod; 19. Spiral groove; 20. Protrusion; 21. First sealing tube; 22. Second sealing tube; 23. Sealing plug; 24. Return spring; 25. Push-pull rod; 26. Gear ring; 27. Pinion; 28. Servo motor; 29. ​​Limiting pulley; 30. Guide pulley. Detailed Implementation

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] Please see Figures 1 to 9 The present invention provides a technical solution: a copper-clad aluminum stranded wire device, including a stranding reel 1, and a plurality of wire feeding wheels 2 are arranged at equal angles on the back of the stranding reel 1. The surface of each wire feeding wheel 2 is wound with a wire bundle 3. The device also includes a spiral metal strip 4 installed on the back of the stranding reel 1 and corresponding to the wire feeding wheels 2. The spiral metal strip 4 can automatically rewind or unwind according to the tension change of the wire bundle 3 to dynamically adjust the tension of the wire bundle 3. Each spiral metal strip 4 has a traction ball 5 on one side, and the traction ball 5 can adaptively adjust its position according to the real-time tension of the wire harness 3 to change the travel path of the wire harness 3 from the feed wheel 2 to the stranding reel 1.

[0029] The spiral metal strip 4 can automatically rewind or expand according to the tension changes of the wire harness 3, realizing dynamic response to tension. When the tension of the wire harness 3 is too high, the spiral metal strip 4 can rewind appropriately, and the outer diameter becomes smaller to buffer the tension of the wire harness 3. Conversely, when the tension is too low, the spiral metal strip 4 automatically expands, and the outer diameter becomes larger. It uses its own elastic force to counteract the tension changes, realizing dynamic buffering and adjustment of tension. This solves the problem of inconsistent tension in traditional stranded wires, ensuring that the wire harness 3 is always in a stable tension state throughout the stranding process, and avoiding excessive stretching and breakage or loosening of the wire harness 3. In addition, the traction ball 5 adaptively changes its position according to the real-time tension. When the wire harness 3 is released too quickly by the wire release wheel 2, causing the wire harness 3 to become too long and loose, the traction ball 5 can physically absorb the excess loose wire harness 3 by extending its travel path. This provides a temporary buffer path for the suddenly lengthened wire harness 3, preventing the loose wire harness 3 from getting tangled, knotted, or piling up during the twisting process. This avoids the shaking of the wire harness 3 caused by looseness in traditional devices and prevents bulging. The tension of the wire harness 3 is automatically sensed and adjusted throughout the process. Compared with traditional devices that require frequent stops to adjust the tension, this design can achieve continuous production and improve production efficiency and stability.

[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, a mounting shaft 6 is fixedly connected to the back of the stranding reel 1, and holes are provided on the surface of the stranding reel 1 at the positions corresponding to the wire bundle 3. After the wire bundle 3 is led out from the wire feeding wheel 2, it passes through the corresponding spiral metal strip 4 and traction ball 5 in sequence, and then passes through the holes of the stranding reel 1. Limiting pulleys 29 and guide pulleys 30 are respectively installed on the back of the stranding reel 1 at the positions corresponding to the wire feeding wheel 2. A rotating shaft 7 is fixedly connected to the inner wall of the spiral metal strip 4. The two ends of the rotating shaft 7 are rotatably connected to the limiting sleeves 8, and the limiting sleeves 8 are fixedly connected to the mounting shaft 6. The spiral metal strip 4 and the rotating shaft 7 are both located inside the limiting sleeves 8, and several auxiliary rollers 9 are rotatably connected to the surface of the spiral metal strip 4. It should be noted that the spiral metal strip 4 and the traction ball 5 are connected by the mounting shaft 6 on the back of the stranded coil 1 to support the overall structure. Holes are set on the surface of the stranded coil 1 at the position corresponding to each wire bundle 3 to guide the wire bundle 3 body through, which plays a role in positioning and preventing deviation. In this embodiment, a limiting pulley 29 and a guide pulley 30 are respectively installed on the back of the stranding reel 1 corresponding to the position of the pay-off wheel 2. The limiting pulley 29 consists of two parallel guide wheels and is rotatably connected to the mounting shaft 6 to limit the wire harness 3 laterally. The guide pulley 30 is located on one side of the hole and stretches the wire harness 3 longitudinally so that the wire harness 3 can pass through the hole accurately. The wire harness 3 is led out from the pay-off wheel 2, wrapped around the spiral metal strip 4, wrapped around the spiral metal strip 4 once, passed through the traction ball 5, and then passed through the limiting pulley 29 and the guide pulley 30, and finally passed through the hole on the stranding reel 1. During this process, the tension of the wire harness 3 can be initially adjusted by adjusting the tension of the spiral metal strip 4. Furthermore, the spiral metal strip 4 in this embodiment has elastic retraction capability. The inner wall is connected to the rotating shaft 7, which can rotate along the limiting sleeve 8 to realize rotational limiting of the spiral metal strip 4 and restrict its axial displacement. The limiting sleeve 8 provides a limiting frame for the spiral metal strip 4, ensuring that the spiral metal strip 4 is always in a bent shape. An auxiliary roller shaft 9 is installed on the surface of the spiral metal strip 4 as a guide support point for the sliding of the wire harness 3, reducing friction and wear between the wire harness 3 and the spiral metal strip 4 and improving service life.

[0031] In this embodiment, as Figure 4 and Figure 5 As shown, the traction ball 5 has a through groove inside for the wire harness 3 to pass through, and ball bearings are installed at both ends of the traction ball 5 corresponding to the positions of the through groove. A swing arm 10 is fixedly connected to the outer wall of the traction ball 5. A turntable 11 is fixedly connected to one end of the swing arm 10. A ratchet 12 is fixedly connected to one side of the turntable 11. A carrier plate 13 is rotatably connected to the other side of the turntable 11. The carrier plate 13 is fixedly connected to the mounting shaft 6. The outer wall of the turntable 11 is wrapped with an elastic rope 14, one end of which is fixedly connected to the turntable 11 and the other end of which is fixedly connected to the carrier plate 13. The turntable 11 rotates to drive the swing arm 10 to swing, accompanied by the stretching of the elastic rope 14. It should be noted that the through groove inside the traction ball 5 provides a stable through channel for the wire harness 3, ensuring that the wire harness 3 always moves along the preset trajectory during the adjustment of the travel path and avoids deviation. The ball bearings at both ends of the through groove directly contact the wire harness 3, transforming the traditional sliding friction into rolling friction, which greatly reduces the friction between the wire harness 3 and the traction ball 5, reduces the wear on the surface of the wire harness 3, and avoids wire breakage or performance degradation caused by friction. The position change of the traction ball 5 is controlled by the swing arm 10. One end of the swing arm 10 is connected to the turntable 11. By rotating the turntable 11, the angle of the swing arm 10 is changed, which further adjusts the position of the traction ball 5. The change in the swing amplitude of the swing arm 10 drives the traction ball 5 to move, which further changes the relative position of the traction ball 5 and the limiting pulley 29, further changing the overall stroke of the wiring harness 3. At the same time, an elastic rope 14 is added to provide a reset force for the turntable 11. When the wiring harness 3 suddenly becomes loose, the elastic rope 14 pulls the turntable 11 to reset, which specifically achieves the following functions. Turntable 11 rotates counterclockwise, causing the swing arm 10 to rotate counterclockwise as well. This brings the traction ball 5 closer to the limiting pulley 29, while the elastic rope 14 stretches. At this time, the elastic rope 14 and the wire harness 3 are mutually restrained. The tension of the wire harness 3 controls the traction ball 5 to remain behind the limiting pulley 29, keeping its position unchanged. When the wire harness 3 suddenly loosens and the tension decreases sharply, the constraint of the wire harness 3 on the traction ball 5 disappears, and the rebound potential energy of the elastic rope 14 becomes the dominant force, pulling the turntable 11 to rotate clockwise and reset. The swing arm 10 swings clockwise synchronously with the turntable 11, and the traction ball 5 moves away from the limiting pulley 29. The travel path of the wire harness 3 from the feed wheel 2 to the stranding reel 1 is extended, providing a buffer path for the loose wire harness 3. The position adjustment of the traction ball 5 always maintains a dynamic balance with the tension change, preventing the wire harness 3 from becoming too loose and preventing shaking during the stranding process.

[0032] In this embodiment, as Figure 6 and Figure 7 As shown, a slide rod 15 is slidably connected to the surface of the carrier plate 13, a slider 16 is slidably connected to one end of the slide rod 15, and a pawl 17 is rotatably connected to one side of the slider 16. It should be noted that the cooperation between the slide bar 15, the slider 16 and the pawl 17 solves the problem of the pawl 17 getting stuck during reset. When the pawl 17 impacts the tooth surface of the ratchet 12 during the process of being inserted into the tooth groove of the ratchet 12, the slider 16 can slide outward along the slide bar 15 to provide buffer space for the pawl 17. As the turntable 11 rotates, the ratchet 12 continues to rotate until the pawl 17 is successfully inserted into the tooth groove, reducing the wear of the components and extending the service life of the components.

[0033] In this embodiment, as Figure 8 and Figure 9 As shown, an extension rod 18 is slidably connected to the inner wall of the rotating shaft 7, and a spiral groove 19 is provided on the surface of the extension rod 18. A protrusion 20 that slides along the spiral groove 19 is welded to the inner wall of the rotating shaft 7. It should be noted that when the spiral metal strip 4 expands, the rotating shaft 7 rotates, causing the protrusion 20 to slide synchronously along the spiral groove 19, so that the extension rod 18 gradually extends outward from the rotating shaft 7, converting the rotational motion of the rotating shaft 7 into the axial sliding of the extension rod 18.

[0034] In this embodiment, as Figure 8 and Figure 9 As shown, one end of the extension rod 18 is provided with a first sealing tube 21, and one end of the first sealing tube 21 is connected to a second sealing tube 22 through a hose. The inner walls of the first sealing tube 21 and the second sealing tube 22 are slidably connected with sealing plugs 23, and a return spring 24 is fixedly connected to one side of the sealing plug 23, and a push-pull rod 25 is fixedly connected to the other side of the sealing plug 23. The push-pull rod 25 located in the first sealing tube 21 is fixedly connected to the extension rod 18, the push-pull rod 25 located in the second sealing tube 22 is rotatably connected to the pawl 17, the first sealing tube 21 is fixedly connected to the limiting sleeve 8, the second sealing tube 22 is fixedly connected to the carrier plate 13, and the interiors of the first sealing tube 21 and the second sealing tube 22 are both filled with hydraulic oil. It should be noted that the first sealing tube 21 is used to connect the extension rod 18, and the second sealing tube 22 is used to connect the pawl 17. As the rotating shaft 7 rotates, the extension rod 18 pushes the push-pull rod 25 in the first sealing tube 21 to slide, thereby driving the sealing plug 23 to slide into the first sealing tube 21. At this time, the hydraulic oil in the first sealing tube 21 is compressed and flows into the second sealing tube 22 through the hose. The sealing plug 23 inside the second sealing tube 22 slides under the push of hydraulic oil, further pushing the push-pull rod 25 inside the second sealing tube 22 to slide out. Since the push-pull rod 25 is rotatably connected to the pawl 17, the pawl 17 is finally moved axially and engaged with the ratchet 12. A tension spring is also installed between the pawl 17 and the push-pull rod 25. One end of the tension spring is fixed to the push-pull rod 25, and the other end is fixedly connected to the outer wall of the pawl 17. When the pawl 17 is impacted by the tooth surface of the ratchet 12 and deflects, the tension spring is used to provide a restoring force for the pawl 17. In addition, a return spring 24 is added to one side of the two sealing plugs 23. When the sealing plug 23 is displaced, it further drives the two return springs 24 to move relative to each other. For example, when the return spring 24 in the first sealing tube 21 is compressed, the return spring 24 in the second sealing tube 22 is stretched. The sealing plug 23 in each sealing tube can be reset by its own return spring 24, which drives the push-pull rod 25 to pull the pawl 17 to slide in the opposite direction, disengaging from the ratchet 12, and simultaneously driving the pawl 17 and the extension rod 18 to reset. The overall structure will gradually return to its initial shape after the tension of the wire harness 3 stabilizes.

[0035] In this embodiment, as Figure 1 As shown, a gear ring 26 is fixedly connected to the outer wall of the strand spool 1. Two small gears 27 mesh on both sides of the gear ring 26, and the output shaft of a servo motor 28 is installed on one side of one of the small gears 27. It should be noted that the toothed ring 26 on the outer wall of the stranding disc 1 forms a multi-tooth meshing structure with the two pinions 27. Compared with single-gear drive, the pinions 27 on both sides mesh with the toothed ring 26 at the same time, which can distribute the force, avoid excessive local wear of the toothed ring 26, and reduce radial wobble during rotation, ensuring that the stranding disc 1 always maintains stable coaxial rotation.

[0036] Working principle: When using this stranding device, firstly, the wire bundles 3 of each pay-off wheel 2 are pulled out. The wire bundles 3 are led out from the pay-off wheel 2 and wound around the spiral metal strip 4. During the winding process, the spiral metal strip 4 needs to be kept in a winding state, which can automatically shrink inward or expand outward. The pawl 17 is disengaged from the ratchet 12. Rotate the ratchet 12 and the turntable 11 counterclockwise, which drives the swing arm 10 and the traction ball 5 to rotate counterclockwise. At the same time, the elastic rope 14 is stretched until the traction ball 5 rotates to the side of the limiting pulley 29. The wire bundles 3 pass through the through groove of the traction ball 5, and then through the limiting pulley 29 and the guide pulley 30. Finally, they pass through the hole on the stranding disc 1. A take-up point is set at the other end of the stranding disc 1 to gather the wire bundles 3. The position of the take-up point remains unchanged. By rotating the stranding disc 1, the wire bundles 3 are driven to rotate and twist together. This process is a well-known technology in the field and will not be described in detail. During the stranding process, the following two phenomena may occur: 1. The tension of wire harness 3 is in a state of stable increase or stable decrease. As the wire harness 3 is being fed along the feed reel 2, the end point of its feed end reciprocates along the axis of the feed reel 2. As the distance between the feed end and the take-up end gradually increases, the tension of the wire harness 3 gradually increases. The tension of the wire harness 3 will be in a state of slow increase. The compressive force of the outer wire harness 3 of the spiral metal strip 4 gradually increases. At this time, the spiral metal strip 4 is squeezed by external force and gradually coils up. The outer diameter gradually decreases, the winding radius of the wire harness 3 decreases, part of the wire harness 3 is released, and the tension decreases. Similarly, as the distance between the wire release end and the wire take-up end gradually decreases, the tension of the wire bundle 3 gradually decreases, and the squeezing force of the outer wire bundle 3 of the spiral metal strip 4 gradually disappears. At this time, the spiral metal strip 4 gradually expands and contracts by relying on its own tension, and the outer diameter gradually increases, supporting the outer wound wire bundle 3 again and retracting the released wire bundle 3. The tension of the wire bundle 3 is adjusted repeatedly in this way. 2. During the wire laying process, the wire tension decreases sharply. Because the wire harness 3 on the wire feeding wheel 2 is tangled and disordered, a large amount of wire is suddenly released during the feeding process. At this time, the tension decreases sharply, the wire harness 3 becomes loose, the constraint force on the traction ball 5 disappears, the elastic rope 14 rebounds, and drives the turntable 11 and ratchet 12 to rotate clockwise along the carrier plate 13, which drives the swing arm 10 and the traction ball 5 to reset. The traction ball 5 moves away from the limit pulley 29, and the overall path of the wire harness 3 increases, providing a buffer path for the excess wire harness 3. At the same time, the wire harness 3 outside the spiral metal strip 4 suddenly disappears, the spiral metal strip 4 begins to expand, gradually expanding to its maximum state, the rotating shaft 7 rotates, and slides along the spiral groove 19 through the internal protrusion 20, pushing the push-pull rod 25 in the first sealing tube 21 out, further pushing the hydraulic oil in the first sealing tube 21 into the second sealing tube 22, causing the sealing plug 23 and the push-pull rod 25 in the second sealing tube 22 to be pushed out, the return spring 24 in the first sealing tube 21 to be compressed, and the return spring 24 in the second sealing tube 22 to be stretched, while pushing the pawl 17 to reset; If the pawl 17 successfully engages in the tooth groove of the ratchet 12, it will hold the ratchet 12 in place, preventing it from rotating counterclockwise again and keeping the position of the traction ball 5 unchanged after rebound. If the pawl 17 hits the tooth surface of the ratchet 12, the slider 16 will slide along the slide bar 15 to provide a buffer space. As the ratchet 12 continues to rotate, the hydraulic oil will drive the sealing plug 23 in the second sealing tube 22 to move forward continuously, and the pawl 17 will re-engage in the tooth groove of the ratchet 12.

[0037] Finally, during the continuous twisting process, the excess wire bundle 3 is gradually absorbed and tightened, squeezing the spiral metal strip 4 inward. At the same time, in conjunction with their respective return springs 24, the respective sealing plugs 23 are reset, the rotating shaft 7 rotates, the extension rod 18 resets, the pawl 17 slides backward to reset, disengages from the ratchet 12, and the ratchet 12 and the turntable 11 are pulled by the traction ball 5, rotating counterclockwise again, and the traction ball 5 returns to its original position.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A copper-clad aluminum stranded wire device, comprising a stranding reel (1), wherein a plurality of wire feeding wheels (2) are arranged at equal angles on the back side of the stranding reel (1), and the surface of each wire feeding wheel (2) is wound with a wire bundle (3), characterized in that: It also includes spiral metal strips (4) installed on the back of the stranding reel (1) and corresponding one-to-one with the wire feeding wheel (2), and the spiral metal strips (4) can automatically rewind or expand according to the tension change of the wire harness (3) to dynamically adjust the tension of the wire harness (3); Each of the spiral metal strips (4) is provided with a traction ball (5) on one side, and the traction ball (5) can adaptively adjust its position according to the real-time tension of the wire harness (3) to change the travel path of the wire harness (3) from the feed wheel (2) to the stranding reel (1).

2. The copper-clad aluminum stranded wire device according to claim 1, characterized in that: The back of the stranding reel (1) is fixedly connected to an installation shaft (6), and holes are provided on the surface of the stranding reel (1) corresponding to the position of the wire bundle (3). After the wire bundle (3) is led out from the wire feeding wheel (2), it passes through the corresponding spiral metal strip (4) and traction ball (5) in sequence, and then passes through the holes of the stranding reel (1). Limiting pulleys (29) and guide pulleys (30) are respectively installed on the back of the stranding reel (1) corresponding to the position of the wire feeding wheel (2).

3. The copper-clad aluminum stranded wire device according to claim 2, characterized in that: The inner wall of the spiral metal strip (4) is fixedly connected to a rotating shaft (7). The two ends of the rotating shaft (7) are rotatably connected to a limiting sleeve (8), and the limiting sleeve (8) is fixedly connected to the mounting shaft (6). The spiral metal strip (4) and the rotating shaft (7) are both located inside the limiting sleeve (8), and a number of equidistant auxiliary rollers (9) are rotatably connected to the surface of the spiral metal strip (4).

4. The copper-clad aluminum stranded wire device according to claim 3, characterized in that: The traction ball (5) has a through groove inside for the wire harness (3) to pass through, and ball bearings are installed at both ends of the traction ball (5) corresponding to the through groove. The outer wall of the traction ball (5) is fixedly connected to a swing rod (10), one end of the swing rod (10) is fixedly connected to a turntable (11), and one side of the turntable (11) is fixedly connected to a ratchet (12), and the other side of the turntable (11) is rotatably connected to a carrier plate (13), and the carrier plate (13) is fixedly connected to the mounting shaft (6).

5. The copper-clad aluminum stranded wire device according to claim 4, characterized in that: The outer wall of the turntable (11) is wrapped with an elastic rope (14), one end of which is fixedly connected to the turntable (11) and the other end of which is fixedly connected to the carrier plate (13). The turntable (11) rotates to drive the swing arm (10) to swing, accompanied by the stretching of the elastic rope (14).

6. The copper-clad aluminum stranded wire device according to claim 4, characterized in that: The surface of the carrier plate (13) is slidably connected to a slide rod (15), one end of the slide rod (15) is slidably connected to a slider (16), and one side of the slider (16) is rotatably connected to a pawl (17).

7. The copper-clad aluminum stranded wire device according to claim 3, characterized in that: The inner wall of the rotating shaft (7) is slidably connected to an extension rod (18), and the surface of the extension rod (18) is provided with a spiral groove (19). The inner wall of the rotating shaft (7) is welded with a protrusion (20) that slides along the spiral groove (19).

8. The copper-clad aluminum stranded wire device according to claim 7, characterized in that: One end of the extension rod (18) is provided with a first sealing tube (21), and one end of the first sealing tube (21) is connected to a second sealing tube (22) through a hose. The inner walls of the first sealing tube (21) and the second sealing tube (22) are slidably connected with sealing plugs (23), and a return spring (24) is fixedly connected to one side of the sealing plug (23), and a push-pull rod (25) is fixedly connected to the other side of the sealing plug (23).

9. A copper-clad aluminum stranded wire device according to claim 8, characterized in that: The push-pull rod (25) located in the first sealing tube (21) is fixedly connected to the extension rod (18), the push-pull rod (25) located in the second sealing tube (22) is rotatably connected to the pawl (17), the first sealing tube (21) is fixedly connected to the limiting sleeve (8), the second sealing tube (22) is fixedly connected to the carrier plate (13), and the interiors of the first sealing tube (21) and the second sealing tube (22) are both filled with hydraulic oil.

10. A copper-clad aluminum stranded wire device according to claim 1, characterized in that: A gear ring (26) is fixedly connected to the outer wall of the strand (1). Two small gears (27) mesh on both sides of the gear ring (26). The output shaft of a servo motor (28) is installed on one side of one of the small gears (27).

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