A single-wheel rotating traction machine and a stranding traction method for a large cross-section conductor.

Abstract

This application discloses a single-wheel rotary traction machine and a stranding traction method for large-section conductors. The single-wheel rotary traction machine includes a main frame, an infeed spindle assembly, a rotary winch, an intermediate guide device, a single traction wheel assembly, a wire-blocking device, and an outfeed spindle assembly. The infeed spindle assembly and the outfeed spindle assembly are rotatably connected to both sides of the main frame. The infeed spindle assembly includes an infeed spindle for wire harness infeed, and the outfeed spindle assembly includes an outfeed spindle for wire harness outfeed. The two ends of the rotary winch are fixedly connected to the infeed spindle and the outfeed spindle, respectively. The single traction wheel assembly is disposed inside the rotary winch and located on the central axis of the rotary winch, and includes a traction motor, a reducer, a single traction wheel, and a traction wheel spindle. The intermediate guide device is fixed inside the rotary winch. This application externally applies traction force to the front end of the stranding machine, avoiding single-wire skipping and winch breakage, improving conductor roundness, and is suitable for the compact stranding process of large-section copper and aluminum conductors.

Description

Technical Field

[0001] This application relates to the field of cable manufacturing equipment technology, specifically to a single-wheel rotating traction machine and a stranding traction method for large-section conductors. Background Technology

[0002] In the field of power cable manufacturing, the stranding process of large-section copper-aluminum conductors is a key technical step. Currently, the industry commonly uses traditional standalone stranding machines to strand multiple layers of conductors in the same direction. However, the following significant technical defects have been found in actual production:

[0003] 1. Conductor structure defects: When stranding large-section copper-aluminum conductors, the number of conductor cores is relatively large. When the conductor structure has more than three layers, due to the use of unidirectional stranding, the outer third layer conductor may automatically embed itself into the gaps between the second layer conductors during the stranding process due to mechanical stress. This phenomenon results in an uneven cross-section of the stranded conductor, seriously affecting the conductor compression effect and the quality of subsequent insulation processes.

[0004] 2. Insufficient dynamic stability: Before the stranded wire bundle enters the internal traction wheel after passing through the stranding bow, a single wire may jump. This not only affects the structural integrity of the conductor, but also brings difficulties to subsequent production processes, resulting in serious quality problems and reducing production efficiency and product qualification rate.

[0005] 3. Equipment Load Capacity Bottleneck: The drawbar plays a crucial role in the stranding process, but its limited radial load capacity makes it unsuitable for stranding large-section, compacted conductors. During the stranding of large-section conductors, the traction force is significant, placing a large radial load on the drawbar, leading to frequent breakage. This further exacerbates production instability and increases costs, severely impacting production efficiency.

[0006] There is currently no effective solution to the aforementioned problems in the existing technology. Summary of the Invention

[0007] To address the aforementioned problems, this application provides a single-wheel rotary traction machine and a stranding traction method for large-section conductors. This solves the problems of existing large stranding machines, which are prone to single-wire skipping and bow breakage when producing large-section copper and aluminum conductors, and also have the drawback of not being able to strand large-section compacted conductors. This application places the single-wheel rotary traction machine at the front end of the large stranded wire, effectively externalizing the traction force of the internal traction machine of the large stranding machine. Through the traction and rotation of this single-wheel rotary traction machine, the stranding traction process is completed in one step at the front end of the large stranded wire, effectively avoiding bow breakage, producing large-section compacted conductors, resulting in a more rounded conductor cross-section, preventing single-wire skipping, thus ensuring production quality, improving production efficiency, and increasing product qualification rate.

[0008] In a first aspect, this application provides a single-wheel rotary traction machine, including a main frame, an inlet spindle assembly, a rotary winch, an intermediate guide device, a single traction wheel assembly, a line-blocking device, and an outlet spindle assembly;

[0009] The infeed spindle assembly and the outfeed spindle assembly are rotatably connected to both sides of the main frame. The infeed spindle assembly includes an infeed spindle for wire harness infeed, and the outfeed spindle assembly includes an outfeed spindle for wire harness outfeed.

[0010] The two ends of the rotating winch are fixedly connected to the inlet main shaft and the outlet main shaft, respectively.

[0011] The single traction wheel assembly is disposed inside the rotating winch and located on the central axis of the rotating winch. It includes a traction motor, a reducer, a single traction wheel, and a traction wheel main shaft. The single traction wheel is sleeved on the outer periphery of the traction wheel main shaft. The traction motor drives the traction wheel main shaft and the single traction wheel fixedly connected to the traction wheel main shaft to rotate through the reducer.

[0012] The intermediate guide device is fixed inside the rotating winch and is used to guide the wire harness from the main inlet shaft to the single traction wheel;

[0013] The wire-blocking device is located between the single traction wheel and the reducer to prevent the wire harness from coming off the rim of the single traction wheel during the winding process on the single traction wheel.

[0014] The lead-out spindle assembly also includes a main motor, which is driven and connected to the lead-out spindle. The main motor is used to drive the lead-out spindle and the rotating auger fixedly connected to the lead-out spindle to rotate and guide the wire harness.

[0015] In one embodiment of this application, the feed spindle is provided with a wire-passing hole, one end of which is provided with a wire-passing mold and the other end is provided with a tapered opening. The feed spindle is provided with an elongated groove, and circular strip-shaped mounting plates are symmetrically arranged on the side of the feed spindle. A steering wheel shaft is provided on the circular strip-shaped mounting plate, and a steering wheel is sleeved on the steering wheel shaft. The steering wheel is rotatably mounted on the circular strip-shaped mounting plate of the feed spindle through the steering wheel shaft, and part of the wheel rim of the steering wheel extends into the elongated groove and is tangent to the wire-passing hole.

[0016] In one embodiment of this application, a first roller with an arc-shaped outer circumference is provided on one side of the rim of the steering wheel to prevent the wire harness from jumping out of the groove; the first roller is rotatably mounted on a roller shaft, and the roller shaft is fixed to one end of the wire feeding main shaft.

[0017] In one embodiment of this application, the rotating winch is provided with a first flange, a second flange, a third flange, a fourth flange and a cylindrical flange inside the cylinder. A circular inspection window is provided between the first flange and the second flange, and a square installation window is provided between the third flange and the fourth flange. The two cylindrical flanges are symmetrically arranged on the inner walls of both sides of the rotating winch.

[0018] In one embodiment of this application, the intermediate guide device is fixed to the right side of the first flange of the rotating winch. The intermediate guide device includes a cable box, a guide wheel, and a guide wheel bracket. The guide wheel is rotatably mounted on the guide wheel bracket. The cable box is a hollow trapezoidal structure for the cable harness to pass through. The cross-sectional area of ​​the cable box increases from its inlet end to its outlet end. The guide wheel is located on one side of the outlet end. The center surface of the groove of the guide wheel coincides with the center surface of the cable box, and is used to guide the cable harness into the groove of the single traction wheel.

[0019] In one embodiment of this application, the traction motor of the single traction wheel assembly is connected to a reducer via a coupling. The output shaft of the reducer is connected to a first synchronous pulley, and the main shaft of the traction wheel is connected to a second synchronous pulley. The first and second synchronous pulleys are connected by a first synchronous belt. The traction motor is fixed between the first and second flanges of the rotating winch, the reducer is fixed to the third flange of the rotating winch, and the main shaft of the traction wheel is rotatably mounted on the cylindrical flange of the rotating winch via bearings.

[0020] In one embodiment of this application, the wire-blocking device includes a crescent-shaped outer baffle, a mounting frame, a small arc plate, and rollers. The small arc plate is fixedly connected to both sides of the mounting frame, and the crescent-shaped outer baffle is fixedly connected to the outer side of the small arc plate. The crescent-shaped outer baffle is located between the single traction wheel and the reducer. The side of the crescent-shaped outer baffle facing the single traction wheel has an arc-shaped surface, and the radius of the arc-shaped surface is larger than the rim radius of the single traction wheel. The small arc plate has a plurality of grooves, and rollers are rotatably disposed in the grooves to reduce the friction between the wire harness and the small arc plate.

[0021] In one embodiment of this application, the main shaft of the outgoing wire spindle assembly is fixedly connected to a third synchronous pulley, and the output shaft of the main motor is fixedly connected to a fourth synchronous pulley. The third and fourth synchronous pulleys are connected by a second synchronous belt. The main motor drives the outgoing wire spindle and the rotating auger fixedly connected to the outgoing wire spindle to rotate through the fourth synchronous pulley, the second synchronous belt, and the third synchronous pulley. The outgoing wire spindle assembly also includes a mounting shaft, which is fixedly connected to one side of the outgoing wire spindle. One end of the mounting shaft extends into the outgoing wire spindle and is fixedly connected to an outgoing wire mold, while the other end is fitted with a slip ring.

[0022] In one embodiment of this application, a brake disc is fixedly connected to one side of the rotating winch, and an air-pressurized disc brake is provided on the main frame. The air-pressurized disc brake cooperates with the brake disc to quickly brake the rotating winch.

[0023] Secondly, this application provides a stranding traction method for large cross-section conductors, using the aforementioned single-wheel rotary traction machine, the method comprising the following steps:

[0024] External traction force: The single-wheel rotating traction machine is placed at the front end of the large stranding machine, which is equivalent to externalizing the traction force of the internal traction machine of the large stranding machine;

[0025] Inlet guide: The multi-core conductor layered bundle is twisted into one strand and enters the wire hole of the inlet spindle through the inlet die. It passes between the steering wheel and the first roller to adjust the path and prevent jumping.

[0026] Intermediate guide: The wire harness then passes through the junction box and guide wheel to the rim of one side of the single traction wheel;

[0027] Stranding and traction: Depending on the stranding process requirements, the wire harness is wound forward or backward onto the groove of the single traction wheel, and then led out to the center of the groove. It then enters the exit mold of the exit spindle. The main motor drives the rotating auger to rotate, while the traction motor drives the single traction wheel to rotate in the direction of the production line, so that the wire harness completes the integrated stranding and traction process.

[0028] The beneficial effects of this application are:

[0029] 1. By using the single-wheel rotary traction machine provided in this application, when producing large-section conductors, the single-wheel rotary traction machine is placed at the front end of a large stranding machine. Through the winding action of the single traction wheel and the rotation action of the rotating cage, the stranding and shaping of multi-core conductors can be completed before entering the large stranding machine. This prevents the wire bundle from experiencing bow breakage or single-wire skipping when entering the large stranding machine.

[0030] 2. During production, the wire harness is introduced through the infeed die of the infeed spindle, then passes through the steering wheel and guide wheel, and is wound onto the circumference of the single traction wheel. It is then exited from the center of the single traction wheel groove and finally exited from the exit die of the exit spindle. Compared to the existing double-wheel take-up machine structure, this reduces the wire harness travel path and avoids multiple bending and deformation of the wire harness. Simultaneously, the wire harness is wound around the single traction wheel groove in a complete circle, increasing the contact area and preventing slippage on the surface of the single traction wheel groove, thus ensuring the stability of the stranding pitch.

[0031] 3. By placing the single-wheel traction component at the center of the rotating winch, the centrifugal force of the rotating winch at high speed is reduced, making the operation smoother. The traction motor is placed inside the rotating winch instead of on the ground, which simplifies the mechanical transmission structure and improves mechanical efficiency.

[0032] In summary, the single-wheel rotary traction machine and stranding traction method for large-section conductors provided in this application, when producing large-section conductors, place the single-wheel rotary traction machine at the front end of a large stranding machine. This is equivalent to externalizing the traction force of the internal traction machine of the large stranding machine. Through the traction and rotation of the single-wheel rotary traction machine, the stranding traction process is completed in one step at the front end of the large stranding machine. The internal traction machine of the large stranding machine needs to use tension mode to wind the wire bundle into the spool. Therefore, the stranding bow of the large stranding machine will not bear a large radial load, and the bow breakage phenomenon will not occur. Since the traction force of the single-wheel rotary traction machine can be designed to meet the tensile load required by the process for large-section conductors, large-section compacted conductors can be produced. At the same time, the torsional deformation stress of single-wire conductors is eliminated, making the conductor shape more rounded. Therefore, when the stranded conductor enters the internal traction wheel through the stranding bow, the single-wire skipping phenomenon will not occur, thereby ensuring production quality, improving production efficiency and product qualification rate. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the single-wheel rotary traction machine provided in the embodiments of this application;

[0034] Figure 2 This is a top view of the single-wheel rotary traction machine provided in an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the structure of the feed spindle assembly provided in the embodiments of this application;

[0036] Figure 4 for Figure 3 Sectional view of AA;

[0037] Figure 5 This is a schematic diagram of the structure of the rotating winch provided in the embodiments of this application;

[0038] Figure 6 This is a schematic diagram of the structure of the intermediate guide device provided in the embodiments of this application;

[0039] Figure 7 This is a schematic diagram of the structure of the single traction wheel assembly provided in the embodiments of this application;

[0040] Figure 8 This is a schematic diagram of the wire-blocking device provided in the embodiments of this application;

[0041] Figure 9 This is a schematic diagram of the structure of the lead-out spindle assembly provided in the embodiment of this application.

[0042] In the diagram: 1. Main frame; 2. Inlet spindle assembly; 21. Inlet spindle; 22. Steering wheel; 221. Steering wheel shaft; 23. First roller; 24. Round strip mounting plate; 25. Long slot; 26. Cable hole; 27. Roller shaft; 28. Inlet mold; 29. ​​Conical inlet; 3. Rotating winch; 31. First flange; 32. Second flange; 33. Third flange; 34. Fourth flange; 35. Cylindrical flange; 36. Circular inspection window; 37. Square mounting window; 4. Intermediate guide device; 41. Cable box; 42. Guide wheel; 43. Guide wheel bracket; 44. Outlet end; 45. Inlet end; 5. Single traction wheel Components; 51. Traction motor; 52. Reducer; 53. Single traction wheel; 54. Traction wheel spindle; 55. First synchronous pulley; 56. Second synchronous pulley; 57. First synchronous belt; 58. Coupling; 6. Cable blocking device; 61. Crescent-shaped baffle; 62. Mounting bracket; 63. Small arc plate; 64. Roller; 65. Groove; 66. Arc surface; 7. Cable exit spindle assembly; 71. Cable exit spindle; 72. Mounting shaft; 73. Cable exit mold; 74. Main motor; 75. Third synchronous pulley; 76. Fourth synchronous pulley; 77. Second synchronous belt; 78. Slip ring; 8. Brake disc; 9. Pneumatic disc brake; 10. Wiring harness. Detailed Implementation

[0043] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] like Figures 1 to 9 As shown, this application embodiment provides a single-wheel rotary traction machine, which includes a main frame 1, an inlet spindle assembly 2, a rotary winch 3, an intermediate guide device 4, a single traction wheel assembly 5, a line blocking device 6, and an outlet spindle assembly 7.

[0047] The infeed spindle assembly 2 and the outfeed spindle assembly 7 are rotatably connected to both sides of the main frame 1, respectively. The infeed spindle assembly 2 includes an infeed spindle 21 for the wire harness 10 to enter, and the outfeed spindle assembly 7 includes an outfeed spindle 71 for the wire harness 10 to exit.

[0048] The two ends of the rotating winch 3 are fixedly connected to the inlet spindle 21 and the outlet spindle 71, respectively.

[0049] The single traction wheel assembly 5 is disposed inside the rotating winch 3 and is located on the central axis of the rotating winch 3. It includes a traction motor 51, a reducer 52, a single traction wheel 53 and a traction wheel main shaft 54. The single traction wheel 53 is sleeved on the outer periphery of the traction wheel main shaft 54. The traction motor 51 drives the traction wheel main shaft 54 ​​and the single traction wheel 53 fixedly connected to the traction wheel main shaft 54 ​​to rotate through the reducer 52.

[0050] The intermediate guide device 4 is fixed inside the rotating winch 3 and is used to guide the wire harness 10 from the wire inlet spindle 21 to the single traction wheel 53.

[0051] The wire-blocking device 6 is disposed between the single traction wheel 53 and the reducer 52 to prevent the wire harness 10 from coming off the rim of the single traction wheel 53 during the winding process on the single traction wheel 53.

[0052] The lead-out spindle assembly 7 also includes a main motor 74, which is driven and connected to the lead-out spindle 71. The main motor 74 is used to drive the lead-out spindle 71 and the rotating winch 3 fixedly connected to the lead-out spindle 71 to rotate and lead out the wire harness 10.

[0053] In some embodiments, the wire feeding spindle 21 is provided with a wire threading hole 26. One end of the wire threading hole 26 is provided with a wire feeding mold 28, and the other end is provided with a tapered opening 29. The wire feeding spindle 21 is provided with a long waist groove 25. A circular strip-shaped mounting plate 24 is symmetrically provided on the side of the wire feeding spindle 21. A steering wheel shaft 221 is provided on the circular strip-shaped mounting plate 24 of the wire feeding spindle 21. A steering wheel 22 is sleeved on the steering wheel shaft 221. The steering wheel 22 is rotatably mounted on the circular strip-shaped mounting plate 24 of the wire feeding spindle 21 through the steering wheel shaft 221, and part of the wheel rim of the steering wheel 22 extends into the long waist groove 25 and is tangent to the wire threading hole 26.

[0054] In this embodiment, one end of the threading hole 26 of the wire feeding spindle 21 is provided with a wire feeding mold 28, and the other end is provided with a tapered opening 29, which can effectively prevent the wire harness 10 from scratching the surface when rotating at high speed. Part of the rim of the steering wheel 22 extends into the elongated groove 25 of the wire feeding spindle 21 and is tangent to the threading hole 26 of the wire feeding spindle 21, which can smoothly guide the wire harness 10 from the wire feeding mold 28 into the rotating winch 3.

[0055] Furthermore, a first roller 23 with an arc-shaped outer circumference is provided on one side of the rim of the steering wheel 22 to prevent the wire harness 10 from jumping out of the groove; the first roller 23 is rotatably mounted on the roller shaft 27, and the roller shaft 27 is horizontally fixed to one end of the wire feed main shaft 21.

[0056] To prevent the wire harness 10 from jumping out of the groove of the steering wheel 22 when the rotating winch 3 is rotating at high speed, a first roller 23 is provided on one side of the rim of the steering wheel 22. The outer periphery of the first roller 23 is arc-shaped. This allows the wire harness 10 to be locked between the outer periphery of the arc surface of the first roller 23 and the groove of the steering wheel 22, effectively preventing the wire harness 10 from jumping out of the groove of the steering wheel 22 when the rotating winch 3 is rotating at high speed.

[0057] In some embodiments, the rotating winch 3 has a first flange 31, a second flange 32, a third flange 33, a fourth flange 34 and a cylindrical flange 35 inside its cylinder. A circular inspection window 36 is provided between the first flange 31 and the second flange 32, and a square installation window 37 is provided between the third flange 33 and the fourth flange 34. The two cylindrical flanges 35 are symmetrically arranged on the inner walls of both sides of the rotating winch 3.

[0058] In this embodiment, in order to ensure smooth high-speed operation and meet structural load-bearing requirements, multiple flanges are provided inside the cylinder of the rotating winch body 3.

[0059] In some embodiments, the intermediate guide device 4 is fixed to the right side of the first flange 31 of the rotating winch 3. The intermediate guide device 4 includes a wire guide box 41, a guide wheel 42, and a guide wheel bracket 43. The guide wheel 42 is rotatably mounted on the guide wheel bracket 43. The wire guide box 41 is a hollow trapezoidal structure for the wire harness 10 to pass through. The cross-sectional area of ​​the wire guide box 41 increases from its inlet end 45 to its outlet end 44. The guide wheel 42 is located on one side of the outlet end 44. The center surface of the groove of the guide wheel 42 coincides with the center surface of the wire guide box 41, and is used to guide the wire harness 10 into the groove of the single traction wheel 53.

[0060] In this embodiment, the wire box 41 and guide wheel 42 of the intermediate guide device 4 can smoothly guide the wire harness 10 from the steering wheel 22 to the single traction wheel 53.

[0061] In some embodiments, the traction motor 51 of the single traction wheel assembly 5 is connected to the reducer 52 via a coupling 58. The output shaft of the reducer 52 is connected to a first synchronous pulley 55, and the traction wheel main shaft 54 ​​is connected to a second synchronous pulley 56. The first synchronous pulley 55 and the second synchronous pulley 56 are connected by a first synchronous belt 57. The traction motor 51 is fixed between the first flange 31 and the second flange 32 of the rotating winch 3, the reducer 52 is fixed to the third flange 33 of the rotating winch 3, and the traction wheel main shaft 54 ​​is rotatably mounted on the cylindrical flange 35 of the rotating winch 3 via bearings.

[0062] In this embodiment, to smoothly lead the wire harness 10 out of the cylinder of the rotating winch 3, the traction wheel main shaft 54 ​​of the single traction wheel assembly 5 is rotatably mounted on the cylindrical flange 35 of the rotating winch 3 via bearings. The traction motor 51 is fixedly connected to the reducer 52 via a coupling 58. The output shaft of the reducer 52 is symmetrically provided with a first synchronous pulley 55, and the traction wheel main shaft 54 ​​is symmetrically provided with a second synchronous pulley 56. The first synchronous pulley 55 and the second synchronous pulley 56 are connected by a first synchronous belt 57. Thus, the traction motor 51 drives the single traction wheel 53 to rotate via the reducer 52, the first synchronous pulley 55, the first synchronous belt 57, and the second synchronous pulley 56, thereby enabling the wire harness 10 to be smoothly led out of the cylinder of the rotating winch 3.

[0063] In some embodiments, the wire-blocking device 6 includes a crescent-shaped outer baffle 61, a mounting frame 62, a small arc plate 63, and rollers 64. The small arc plate 63 is fixedly connected to both sides of the mounting frame 62, and the crescent-shaped outer baffle 61 is fixedly connected to the outer side of the small arc plate 63. The crescent-shaped outer baffle 61 is located between the single traction wheel 53 and the reducer 52. The side of the crescent-shaped outer baffle 61 facing the single traction wheel 53 is provided with an arc-shaped surface 66, and the radius of the arc-shaped surface 66 is larger than the rim radius of the single traction wheel 53. The small arc plate 63 is provided with a plurality of grooves 65, and rollers 64 are rotatably arranged in the grooves 65 to reduce the friction between the wire harness 10 and the small arc plate 63.

[0064] In this embodiment, to prevent the wire harness 10 from detaching from the rim of the single traction wheel 53 during high-speed rotation on the single traction wheel 53, a wire-blocking device 6 is provided on the side of the single traction wheel 53. The radius of the arc surface 66 of the crescent-shaped baffle 61 of the wire-blocking device 6 is slightly larger than the radius of the rim of the single traction wheel 53, so as to ensure that the single traction wheel 53 does not contact the arc surface 66 during rotation. Small arc plates 63 are symmetrically arranged on both sides of the mounting bracket 62. Multiple grooves 65 are opened in the middle of the small arc plates 63. Rollers 64 are rotatably arranged in the grooves 65 to convert the sliding friction between the wire harness 10 and the small arc plates 63 into rolling friction, thereby reducing the contact friction force between the wire harness 10 and the small arc plates 63.

[0065] In some embodiments, the main shaft 71 of the main shaft assembly 7 is fixedly connected to a third synchronous pulley 75, and the output shaft of the main motor 74 is fixedly connected to a fourth synchronous pulley 76. The third synchronous pulley 75 and the fourth synchronous pulley 76 are connected by a second synchronous belt 77. The main motor 74 drives the main shaft 71 and the rotating auger 3 fixedly connected to the main shaft 71 to rotate through the fourth synchronous pulley 76, the second synchronous belt 77, and the third synchronous pulley 75.

[0066] Furthermore, the outgoing main shaft assembly 7 also includes a mounting shaft 72, which is fixedly connected to one side of the outgoing main shaft 71. One end of the mounting shaft 72 extends into the outgoing main shaft 71 and is fixedly connected to the outgoing mold 73, while the other end is sleeved with a slip ring 78.

[0067] In this embodiment, the right end of the lead-out spindle 71 is threadedly connected to a mounting shaft 72. One end of the mounting shaft 72 is provided with an outlet mold 72 for guiding the lead-out; the other end is fitted with a slip ring 78 for providing power to the traction machine.

[0068] In some embodiments, a brake disc 8 is fixedly connected to one side of the rotating winch 3, and an air-pressurized disc brake 9 is provided on the main frame 1. The air-pressurized disc brake 9 cooperates with the brake disc 8 to quickly brake the rotating winch 3.

[0069] In this embodiment, in order to ensure that the rotating winch 3 can stop quickly and smoothly, a brake disc 8 is threadedly connected to the right end face of the rotating winch 3, and an air-compressed disc brake 9 is fixed in the middle of the main frame 1, with one symmetrically arranged at the front and back. The air-compressed disc brake 9 cooperates with the brake disc 8 to brake the rotating winch 3 quickly, thereby ensuring that the rotating winch 3 can stop quickly and smoothly.

[0070] The working principle of the single-wheel rotary traction machine provided in this application is as follows:

[0071] The multi-core conductor layered bundle is twisted into a single strand. The wire harness 10 passes through the inlet mold 28 of the inlet spindle 21, along the bottom edge of the groove of the steering wheel 22, and then through the guide wheel 42 of the intermediate guide device 4 to enter the rim of the single traction wheel 53. Depending on the stranding process requirements, it is wound in the forward or reverse direction on the groove of the single traction wheel 53, and then led out at the center of the groove. It then enters the outlet mold 73 of the outlet spindle 71. Then the main motor 74 drives the rotating winch 3 to rotate, and at the same time the traction motor 51 drives the single traction wheel 53 to rotate in the direction of production line travel, so that the wire harness 10 completes the traction and stranding process.

[0072] In summary, when producing large-section conductors, placing the single-wheel rotary traction machine provided in this application at the front end of a large stranding machine is equivalent to externalizing the traction force of the internal traction machine of the large stranding machine. Through the traction and rotation of the single-wheel rotary traction machine, the stranding and traction process is completed in one step at the front end of the large stranding machine. The internal traction machine of the large stranding machine needs to use tension mode to wind the wire bundle into the spool. Therefore, the stranding bow of the large stranding machine will not bear a large radial load, and the bow breakage phenomenon will not occur. Since the traction force of the single-wheel rotary traction machine can be designed to meet the tensile load required for large-section conductors according to process needs, large-section compacted conductors can be produced. At the same time, the torsional deformation stress of single-wire conductors is eliminated, making the conductor shape more rounded. Therefore, when the stranded conductor enters the internal traction wheel through the stranding bow, the single-wire skipping phenomenon will not occur, thereby ensuring production quality and improving production efficiency and product qualification rate.

[0073] Furthermore, this application also provides a stranding traction method for large cross-section conductors, using the aforementioned single-wheel rotary traction machine, the method comprising the following steps:

[0074] Step S1, External Traction Force: The single-wheel rotating traction machine is placed at the front end of the large stranding machine, which is equivalent to externalizing the traction force of the internal traction machine of the large stranding machine.

[0075] Step S2, wire feeding guidance: The multi-core conductor layered bundle twisted into one strand wire bundle 10 enters the wire feeding hole 26 of the wire feeding main shaft 21 through the wire feeding mold 28, and passes between the steering wheel 22 and the first roller 23 to adjust the path and prevent jumping.

[0076] Step S3, intermediate guide: The wire harness 10 then passes through the cable box 41 and guide wheel 42 to enter the rim of one side of the single traction wheel 53;

[0077] Step S4, Stranding and Traction: According to the stranding process requirements, the wire harness is wound in the groove of the single traction wheel 53 in either the forward or reverse direction until it is pulled out at the center of the groove. Then it enters the wire exit mold 73 of the wire exit main shaft 71. Then the main motor 74 drives the rotating auger 3 to rotate, while the traction motor 51 drives the single traction wheel 53 to rotate in the direction of the production line, so that the wire harness 10 completes the integrated stranding and traction process.

[0078] The stranding traction method provided in this application places the single-wheel rotating traction machine at the front end of a large stranding machine, effectively externalizing the traction force of the internal traction machine of the large stranding machine. Through the traction and rotation of the single-wheel rotating traction machine, the stranding traction process is completed in one step when the large stranding machine enters the front end of the wire. After the wire harness 10 is stranded and shaped, it enters the bow, reducing the radial load on the bow and avoiding single-wire skipping and bow breakage. The full-circle winding design of the single traction wheel 53 increases the contact area between the wire harness 10 and the wheel groove, preventing the wire harness from slipping on the surface of the wheel groove and ensuring the stability of the stranding pitch. By placing the single-wheel traction component at the center of the rotating cage, the centrifugal force of the rotating cage at high speed is reduced, making the operation smoother. The traction motor is placed inside the rotating cage instead of on the ground, simplifying the mechanical transmission structure and improving mechanical efficiency. Therefore, this application provides a single-wheel rotary traction machine, which achieves efficient stranding traction of large-section conductors by integrating the traction motor 51 into the center of the rotary winch 3, combined with the full-circle winding design of the single traction wheel 53 and the roller constraint of the wire-blocking device 6. This stranding traction method externally applies the traction force to the front end of the stranding machine, avoiding single-wire skipping and bow breakage, improving conductor roundness, and is suitable for the compact stranding process of large-section copper and aluminum conductors.

[0079] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A single-wheel rotary traction machine, characterized in that, It includes a main frame (1), an inlet spindle assembly (2), a rotating winch (3), an intermediate guide device (4), a single traction wheel assembly (5), a wire blocking device (6), and an outlet spindle assembly (7). The infeed spindle assembly (2) and the outfeed spindle assembly (7) are rotatably connected to both sides of the main frame (1). The infeed spindle assembly (2) includes an infeed spindle (21) for the wire harness (10) to enter, and the outfeed spindle assembly (7) includes an outfeed spindle (71) for the wire harness (10) to exit. The two ends of the rotating winch (3) are fixedly connected to the inlet main shaft (21) and the outlet main shaft (71), respectively; The single traction wheel assembly (5) is disposed inside the rotating winch (3) and located on the central axis of the rotating winch (3). It includes a traction motor (51), a reducer (52), a single traction wheel (53), and a traction wheel main shaft (54). The single traction wheel (53) is sleeved on the outer periphery of the traction wheel main shaft (54). The traction motor (51) drives the traction wheel main shaft (54) and the single traction wheel (53) fixedly connected to the traction wheel main shaft (54) to rotate through the reducer (52). The intermediate guide device (4) is fixed inside the rotating winch (3) and is used to guide the wire harness (10) from the main shaft (21) to the single traction wheel (53). The wire-blocking device (6) is located between the single traction wheel (53) and the reducer (52) to prevent the wire harness (10) from coming off the rim of the single traction wheel (53) during the winding process on the single traction wheel (53); The main shaft assembly (7) further includes a main motor (74), which is driven to the main shaft (71). The main motor (74) is used to drive the main shaft (71) and the rotating auger (3) fixedly connected to the main shaft (71) to rotate and output the wire harness (10). The wire blocking device (6) includes a crescent-shaped outer baffle (61), a mounting frame (62), a small arc plate (63), and rollers (64). The mounting frame (62) is fixedly connected to both sides of the small arc plate (63), and the crescent-shaped outer baffle (61) is fixedly connected to the outer side of the small arc plate (63). The crescent-shaped outer baffle (61) is located between the single traction wheel (53) and the reducer (52). The side of the crescent-shaped outer baffle (61) facing the single traction wheel (53) is provided with an arc surface (66), and the radius of the arc surface (66) is greater than the rim radius of the single traction wheel (53). The small arc plate (63) is provided with a number of grooves (65), and rollers (64) are rotatably arranged in the grooves (65) to reduce the friction between the wire harness (10) and the small arc plate (63).

2. The single-wheel rotary traction machine according to claim 1, characterized in that, The main shaft (21) is provided with a wire hole (26). One end of the wire hole (26) is provided with a wire entry mold (28), and the other end is provided with a tapered opening (29). The main shaft (21) is provided with a long waist groove (25). A round bar-shaped mounting plate (24) is symmetrically provided on the side of the main shaft (21). A steering wheel shaft (221) is provided on the round bar-shaped mounting plate (24). A steering wheel (22) is sleeved on the steering wheel shaft (221). The steering wheel (22) is rotatably mounted on the round bar-shaped mounting plate (24) of the main shaft (21) through the steering wheel shaft (221). Part of the wheel rim of the steering wheel (22) extends into the long waist groove (25) and is tangent to the wire hole (26).

3. A single-wheel rotary traction machine according to claim 2, characterized in that, The steering wheel (22) has a first roller (23) with an outer arc surface on one side of its rim to prevent the wire harness (10) from jumping out of the groove; the first roller (23) is rotatably mounted on the roller shaft (27), which is fixed to one end of the wire feed main shaft (21).

4. A single-wheel rotary traction machine according to claim 3, characterized in that, The rotating winch (3) has a first flange (31), a second flange (32), a third flange (33), a fourth flange (34) and a cylindrical flange (35) inside its cylinder. A circular inspection window (36) is provided between the first flange (31) and the second flange (32), and a square installation window (37) is provided between the third flange (33) and the fourth flange (34). The two cylindrical flanges (35) are symmetrically arranged on the inner walls of both sides of the rotating winch (3).

5. A single-wheel rotary traction machine according to claim 4, characterized in that, The intermediate guide device (4) is fixed to the right side of the first flange (31) of the rotating winch (3). The intermediate guide device (4) includes a wire box (41), a guide wheel (42) and a guide wheel bracket (43). The guide wheel (42) is rotatably mounted on the guide wheel bracket (43). The wire box (41) is a hollow trapezoidal structure for the wire harness (10) to pass through. The cross-sectional area of ​​the wire box (41) increases from its inlet end (45) to its outlet end (44). The guide wheel (42) is located on one side of the outlet end (44). The center surface of the groove of the guide wheel (42) coincides with the center surface of the wire box (41) and is used to guide the wire harness (10) into the groove of the single traction wheel (53).

6. A single-wheel rotary traction machine according to claim 5, characterized in that, The traction motor (51) of the single traction wheel assembly (5) is connected to the reducer (52) via a coupling (58). The output shaft of the reducer (52) is connected to a first synchronous pulley (55), and the traction wheel main shaft (54) is connected to a second synchronous pulley (56). The first synchronous pulley (55) and the second synchronous pulley (56) are connected by a first synchronous belt (57). The traction motor (51) is fixed between the first flange (31) and the second flange (32) of the rotating winch (3). The reducer (52) is fixed to the third flange (33) of the rotating winch (3). The traction wheel main shaft (54) is rotatably mounted on the cylindrical flange (35) of the rotating winch (3) via a bearing.

7. A single-wheel rotary traction machine according to claim 6, characterized in that, The main shaft (71) of the main shaft assembly (7) is fixedly connected to a third synchronous pulley (75), and the output shaft of the main motor (74) is fixedly connected to a fourth synchronous pulley (76). The third synchronous pulley (75) and the fourth synchronous pulley (76) are connected by a second synchronous belt (77). The main motor (74) drives the main shaft (71) and the rotating winch (3) fixedly connected to the main shaft (71) to rotate through the fourth synchronous pulley (76), the second synchronous belt (77), and the third synchronous pulley (75). The main shaft assembly (7) also includes a mounting shaft (72). The mounting shaft (72) is fixedly connected to one side of the main shaft (71). One end of the mounting shaft (72) extends into the main shaft (71) and is fixedly connected to the main mold (73). The other end is fitted with a slip ring (78).

8. A single-wheel rotary traction machine according to claim 7, characterized in that, A brake disc (8) is fixedly connected to one side of the rotating winch (3), and an air-pressurized disc brake (9) is provided on the main frame (1). The air-pressurized disc brake (9) cooperates with the brake disc (8) to quickly brake the rotating winch (3).

9. A method for stranding and traction of a large cross-section conductor, using a single-wheel rotating traction machine as described in claim 7 or 8, the method comprising the following steps: External traction force: The single-wheel rotating traction machine is placed at the front end of the large stranding machine; Inlet guide: The multi-core conductor layered bundle twisted into one strand wire (10) enters the wire hole (26) of the inlet spindle (21) through the inlet die (28), and passes between the steering wheel (22) and the first roller (23) to adjust the path and prevent jumping. Intermediate guide: The wire harness (10) then passes through the junction box (41) and guide wheel (42) to enter the rim of the single traction wheel (53) on one side; Twisting and traction: The wire harness is wound in the groove of the single traction wheel (53) in the forward or reverse direction according to the twisting process requirements, and then pulled out at the center of the groove. It then enters the wire exit mold (73) of the wire exit main shaft (71). Then the main motor (74) drives the rotating auger (3) to rotate, and at the same time the traction motor (51) drives the single traction wheel (53) to rotate in the direction of the production line, so that the wire harness (10) completes the integrated twisting and traction process.

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