Single-wheel rotary traction machine and stranding traction method of large-section conductor

Abstract

The invention discloses a single-wheel rotary traction machine and a stranding traction method of a large-section conductor. The single-wheel rotary traction machine comprises a main rack, a wire inlet main shaft assembly, a rotary stranding cage, a middle guide device, a single traction wheel assembly, a wire blocking device and a wire outlet main shaft assembly. The wire inlet main shaft assembly and the wire outlet main shaft assembly are rotationally connected to the two sides of the main machine frame respectively, the wire inlet main shaft assembly comprises a wire inlet main shaft used for wire harness wire inlet, and the wire outlet main shaft assembly comprises a wire outlet main shaft used for wire harness wire outlet; the two ends of the rotary stranding cage are fixedly connected with the wire inlet main shaft and the wire outlet main shaft respectively. The single traction wheel assembly is arranged in the rotary stranding cage and located on the central axis of the rotary stranding cage and comprises a traction motor, a speed reducer, a single traction wheel and a traction wheel main shaft. And the middle guide device is fixed in the rotary stranding cage. The external traction force is applied to the front end of the stranding machine, the phenomena of single-wire strand jumping and stranding bow breakage are avoided, the roundness of the conductor is improved, and the device is suitable for the compression stranding process of the large-section copper-aluminum conductor.

Description

Technical Field

[0001] The present application relates to the technical field of cable manufacturing equipment, and in particular to a single-wheel rotary traction machine and a twisting and traction method for large-section conductors. Background Art

[0002] In the field of power cable manufacturing, the stranding process of large-section copper-aluminum conductors is a key technical link. At present, the industry generally uses traditional single stranding machines to strand multi-layer conductors in the same direction, but the following significant technical defects are found in actual production:

[0003] 1. Conductor structure defects: When twisting large-section copper-aluminum conductors, the number of conductor cores is large. When the number of conductor structure layers exceeds three or more, the third outer conductor will automatically embed into the gap between the second conductors due to mechanical stress during the twisting process due to the use of co-directional twisting. This phenomenon causes the cross-section of the conductor to be uneven after twisting, which seriously affects the conductor compression effect and the quality of subsequent insulation processes.

[0004] 2. Insufficient dynamic stability: When the twisted wire harness passes through the twist bow and enters the internal traction wheel, single-wire skipping will occur. Single-wire skipping will not only affect the structural integrity of the conductor, but also bring difficulties to the subsequent production process, thereby causing serious quality problems and reducing production efficiency and product qualification rate.

[0005] 3. Equipment load bottleneck: The twisting bow plays an important role in the twisting process, but due to its limited radial load, it cannot meet the twisting requirements of large-section compact conductors. In the twisting process of large-section conductors, the traction force is large, and the twisting bow will bear a large radial load, resulting in frequent bow breakage, which further aggravates the instability of production and the increase in costs, seriously affecting production efficiency.

[0006] With respect to the above-mentioned problems in the prior art, no effective solution has been proposed yet. Summary of the invention

[0007] In order to solve the above problems, the present application provides a single-wheel rotary traction machine and a stranding traction method for large-section conductors, which solves the problem that the existing large-scale stranding machines are prone to single-wire skipping, bow breakage and other phenomena when producing large-section copper and aluminum conductors, and there is a process disadvantage that large-section compact conductors cannot be stranded. The present application places the single-wheel rotary traction machine at the front end of the large stranded wire, which 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 entering the wire, which can effectively avoid the bow breakage phenomenon, can produce large-section compact conductors, make the conductor cross-section more rounded, and avoid the single-wire skipping phenomenon, thereby ensuring production quality and improving production efficiency and product qualification rate.

[0008] In a first aspect, the present application provides a single-wheel rotary traction machine, including a main frame, an incoming line spindle assembly, a rotary capstan, an intermediate guide device, a single traction wheel assembly, a line blocking device, and an outgoing line spindle assembly;

[0009] The incoming line spindle assembly and the outgoing line spindle assembly are rotatably connected to the two sides of the main frame respectively, the incoming line spindle assembly includes an incoming line spindle for the incoming line of the wire harness, and the outgoing line spindle assembly includes an outgoing line spindle for the outgoing line of the wire harness;

[0010] The two ends of the rotating cage are fixedly connected to the incoming line main shaft and the outgoing line main shaft respectively;

[0011] The single traction wheel assembly is arranged in the rotating cage and is located on the central axis of the rotating cage, and 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 in the rotating cage and is used to guide the wire harness from the incoming main shaft to the single traction wheel;

[0013] The wire blocking device is arranged between the single traction wheel and the reducer, and is used to prevent the wire harness from being separated from the rim of the single traction wheel during winding on the single traction wheel;

[0014] The outgoing line spindle assembly also includes a main motor, which is drivingly connected to the outgoing line spindle. The main motor is used to drive the outgoing line spindle and a rotating cage fixedly connected to the outgoing line spindle to rotate and lead out the wire harness.

[0015] In one embodiment of the present application, the wire feeding spindle is provided with a wire threading hole, a wire feeding mold is provided at one end of the wire threading hole, and a tapered mouth is provided at the other end, the wire feeding spindle is provided with a long waist groove, and a round bar type mounting plate is symmetrically provided on the side of the wire feeding spindle, and the round bar type mounting plate is provided with a steering wheel axle, and a steering wheel is provided on the outer sleeve of the steering wheel axle, and the steering wheel is rotatably set on the round bar type mounting plate of the wire feeding spindle through the steering wheel axle, and part of the wheel rim of the steering wheel extends into the long waist groove and is tangent to the wire threading hole.

[0016] In one embodiment of the present 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 wiring harness from jumping; the first roller is rotatably arranged on a roller shaft, and the roller shaft is transversely fixed to one end of the wire feed main shaft.

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

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

[0019] In one embodiment of the present application, the traction motor of the single traction wheel assembly is connected to the reducer through a coupling, the output shaft of the reducer is connected to the first synchronous wheel, the traction wheel main shaft is connected to the second synchronous wheel, and the first synchronous wheel and the second synchronous wheel are connected through a first synchronous belt transmission; the traction motor is fixed between the first flange and the second flange of the rotating capstan, the reducer is fixed to the third flange of the rotating capstan, and the traction wheel main shaft is rotatably arranged on the cylindrical flange of the rotating capstan through a bearing.

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

[0021] In one embodiment of the present application, the wire-outgoing main shaft of the wire-outgoing main shaft assembly is fixedly connected to a third synchronous wheel, the output shaft of the main motor is fixedly connected to a fourth synchronous wheel, the third synchronous wheel and the fourth synchronous wheel are connected via a second synchronous belt transmission, the main motor drives the wire-outgoing main shaft and the rotating cage fixedly connected to the wire-outgoing main shaft to rotate via the fourth synchronous wheel, the second synchronous belt, and the third synchronous wheel; the wire-outgoing main shaft assembly also includes an installation shaft, which is fixedly connected to one side of the wire-outgoing main shaft, one end of the installation shaft extends into the wire-outgoing main shaft and is fixedly connected to a wire-outgoing mold, and the other end is sleeved with a collector ring.

[0022] In one embodiment of the present application, a brake disc is fixedly connected to one side of the rotating cage, and a pneumatic disc brake is provided on the main frame. The pneumatic disc brake cooperates with the brake disc to quickly brake the rotating cage.

[0023] In a second aspect, the present application provides a method for stranding and pulling a large-section conductor, using the single-wheel rotary pulling machine, the method comprising the following steps:

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

[0025] Wire guide: The wire bundle of multi-core conductors twisted into one strand enters the threading hole of the wire feed spindle through the wire feed die, and passes between the steering wheel and the first roller to adjust the path and prevent jumping;

[0026] Intermediate guide: The wire harness passes through the threading box and the guide wheel and enters the wheel flange on one side of the single traction wheel;

[0027] Twisting and traction: According to the twisting process requirements, the wire is wound forward or reversely on the wheel groove of the single traction wheel, led out to the center of the wheel groove, and then enters the wire outlet mold of the outlet spindle. Then the main motor drives the rotating cage to rotate, and at the same time 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 process of twisting and traction.

[0028] Beneficial effects of this application:

[0029] 1. By using the single-wheel rotary traction machine provided by the present application, when producing large-section conductors, the single-wheel rotary traction machine is placed at the front end of a large-scale stranding machine. Through the winding action of the single traction wheel and the rotating action of the rotary stranding cage, the stranding of the multi-core conductor can be completed before entering the large-scale stranding machine. It will not cause the wire harness to break when passing through the stranding bow of the large-scale stranding machine and cause the phenomenon of single-wire strand skipping.

[0030] 2. During production, the wire harness is introduced from the wire-intake die of the wire-intake spindle, passes through the steering wheel and the guide wheel, and then is wound onto the circumferential surface of the single traction wheel, led out from the middle of the wheel groove of the single traction wheel, and then led out from the wire-out die of the wire-out spindle. Compared with the existing double-wheel lead-in machine structure, the wire harness travel path is reduced to avoid multiple bending and deformation of the wire harness. At the same time, the wire harness is wound around the single-wheel pulley groove in a full circle, which increases the contact area, prevents the wire harness from slipping on the surface of the single-wheel pulley groove, and ensures the stability of the twisting pitch.

[0031] 3. By setting the single-wheel traction assembly 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, which simplifies the mechanical transmission structure and improves the mechanical efficiency.

[0032] In summary, the present application provides a single-wheel rotary traction machine and a method for twisting and traction of large-section conductors. When producing large-section conductors, the single-wheel rotary traction machine is placed at the front end of a large-scale stranding machine, which is equivalent to externalizing the traction force of the internal traction machine of the large-scale stranding machine. Through the traction and rotation action of the single-wheel rotary traction machine, the twisting and traction process is completed in one step at the front end of the large-scale stranding machine entering the wire. The internal traction machine of the large-scale stranding machine needs to adopt a tension mode to reel the wire bundle into the material tray. Therefore, the twisting bow of the large-scale stranding machine will not bear a large radial load and will not break. Since the traction tension of the single-wheel rotary traction machine can be designed according to the process requirements to meet the tensile load required for large-section conductors, large-section compressed conductors can be produced. At the same time, the torsional deformation stress of the single-filament conductor is eliminated, making the conductor shape more rounded. Therefore, when the stranded conductor enters the internal traction wheel through the twisting bow, there will be no single-filament jump phenomenon, thereby ensuring production quality and improving production efficiency and product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of a single-wheel rotary traction machine provided in an embodiment of the present application;

[0034] Figure 2 A top view of a single-wheel rotary tractor provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the structure of the line feed spindle assembly provided in an embodiment of the present application;

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

[0037] Figure 5 A schematic diagram of the structure of a rotary cage provided in an embodiment of the present application;

[0038] Figure 6 A schematic diagram of the structure of the intermediate guide device provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of the structure of a single traction wheel assembly provided in an embodiment of the present application;

[0040] Figure 8 A schematic diagram of the structure of a wire blocking device provided in an embodiment of the present application;

[0041] Fig. 9 A schematic diagram of the structure of the output line spindle assembly provided in an embodiment of the present application.

[0042] In the figure: 1. Main frame; 2. Inlet spindle assembly; 21. Inlet spindle; 22. Steering wheel; 221. Steering wheel shaft; 23. First roller; 24. Round bar type mounting plate; 25. Long waist groove; 26. Threading hole; 27. Roller shaft; 28. Inlet mold; 29. ​​Conical mouth; 3. Rotary capstan; 31. First flange; 32. Second flange; 33. Third flange; 34. Fourth flange; 35. Cylinder flange; 36. Round inspection window; 37. Square mounting window; 4. Intermediate guide device; 41. Threading box; 42. Guide wheel; 43. Guide wheel bracket; 44. Outlet end; 45. Inlet end; 5. Single traction wheel Assembly; 51. traction motor; 52. speed reducer; 53. single traction wheel; 54. traction wheel main shaft; 55. first synchronous wheel; 56. second synchronous wheel; 57. first synchronous belt; 58. coupling; 6. wire blocking device; 61. half-moon baffle; 62. mounting frame; 63. small arc plate; 64. roller; 65. groove; 66. arc surface; 7. outlet main shaft assembly; 71. outlet main shaft; 72. mounting shaft; 73. outlet mold; 74. main motor; 75. third synchronous wheel; 76. fourth synchronous wheel; 77. second synchronous belt; 78. collector ring; 8. brake disc; 9. pneumatic disc brake; 10. wiring harness. DETAILED DESCRIPTION

[0043] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] like Figures 1 to 9 As shown, the embodiment of the present application provides a single-wheel rotary traction machine, which includes a main frame 1, an incoming line main shaft assembly 2, a rotary cage 3, an intermediate guide device 4, a single traction wheel assembly 5, a line blocking device 6 and an outgoing line main shaft assembly 7;

[0047] The incoming line spindle assembly 2 and the outgoing line spindle assembly 7 are rotatably connected to the two sides of the main frame 1 respectively, the incoming line spindle assembly 2 includes an incoming line spindle 21 for the incoming line of the wire harness 10, and the outgoing line spindle assembly 7 includes an outgoing line spindle 71 for the outgoing line of the wire harness 10;

[0048] The two ends of the rotating cage 3 are fixedly connected to the incoming line main shaft 21 and the outgoing line main shaft 71 respectively;

[0049] The single traction wheel assembly 5 is arranged in the rotating cage 3 and is located on the central axis of the rotating cage 3, and 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 in the rotating cage 3 and is used to guide the wire harness 10 from the incoming main shaft 21 to the single traction wheel 53;

[0051] The wire blocking device 6 is arranged between the single traction wheel 53 and the reducer 52, and is used to prevent the wire harness 10 from being separated from the rim of the single traction wheel 53 during the winding process on the single traction wheel 53;

[0052] The outgoing wire spindle assembly 7 further includes a main motor 74 , which is drivingly connected to the outgoing wire spindle 71 . The main motor 74 is used to drive the outgoing wire spindle 71 and the rotating cage 3 fixedly connected to the outgoing wire 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, a wire feeding mold 28 is provided at one end of the wire threading hole 26, and a tapered mouth 29 is provided at the other end. The wire feeding spindle 21 is provided with a long waist groove 25, and a round bar type mounting plate 24 is symmetrically provided on the side of the wire feeding spindle 21. The round bar type mounting plate 24 is provided with a steering wheel shaft 221, and a steering wheel 22 is provided on the outer sleeve of the steering wheel shaft 221. The steering wheel 22 is rotatably set on the round bar type 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, a wire entry die 28 is provided at one end of the threading hole 26 of the wire entry main shaft 21, and a conical opening 29 is provided at the other end, which can effectively prevent the wire harness 10 from scratching the surface when rotating at high speed. Part of the wheel edge of the steering wheel 22 extends into the long waist groove 25 of the wire entry main shaft 21 and is tangent to the threading hole 26 of the wire entry main shaft 21, so that the wire harness 10 can be smoothly introduced from the wire entry die 28 into the interior of the rotating cage 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 wiring harness 10 from jumping out of the slot; the first roller 23 is rotatably provided on a roller shaft 27, and the roller shaft 27 is transversely fixed to one end of the wire feed main shaft 21.

[0056] In order to prevent the wire harness 10 from jumping out of the wheel groove of the steering wheel 22 when the rotating cage 3 is running at high speed, a first roller 23 is provided on one side of the wheel rim of the steering wheel 22 of the present application, and the outer periphery of the first roller 23 is an arc surface. Thus, the wire harness 10 can be stuck between the arc surface outer periphery of the first roller 23 and the wheel groove of the steering wheel 22, which can effectively prevent the wire harness 10 from jumping out of the wheel groove of the steering wheel 22 when the rotating cage 3 is running at high speed.

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

[0058] In this embodiment, in order to ensure stable high-speed operation and structural bearing requirements, a plurality of flanges are arranged inside the cylinder of the rotary cage 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 cage 3, and the intermediate guide device 4 includes a wire threading box 41, a guide wheel 42 and a guide wheel bracket 43. The guide wheel 42 is rotatably set on the guide wheel bracket 43. The wire threading box 41 is a hollow trapezoidal structure for allowing the wire harness 10 to pass through. The cross-sectional area of ​​the wire threading box 41 increases from its inlet end 45 to the outlet end 44. The guide wheel 42 is located on one side of the outlet end 44. The center plane of the wheel groove of the guide wheel 42 coincides with the center plane of the wire threading box 41, which is used to guide the wire harness 10 into the wheel groove of the single traction wheel 53.

[0060] In this embodiment, the wire threading box 41 and the 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 through a coupling 58, the output shaft of the reducer 52 is connected to the first synchronous wheel 55, the traction wheel main shaft 54 ​​is connected to the second synchronous wheel 56, and the first synchronous wheel 55 and the second synchronous wheel 56 are connected through a first synchronous belt 57; the traction motor 51 is fixed between the first flange 31 and the second flange 32 of the rotating cage 3, the reducer 52 is fixed to the third flange 33 of the rotating cage 3, and the traction wheel main shaft 54 ​​is rotatably arranged on the cylindrical flange 35 of the rotating cage 3 through a bearing.

[0062] In this embodiment, in order to smoothly lead the wire harness 10 out of the cylinder of the rotating cage 3, the traction wheel main shaft 54 ​​of the single traction wheel assembly 5 is rotatably arranged on the cylindrical flange 35 of the rotating cage 3 through a bearing, the traction motor 51 is fixedly connected to the reducer 52 through a coupling 58, the output shaft of the reducer 52 is symmetrically provided with a first synchronous wheel 55, the traction wheel main shaft 54 ​​is symmetrically provided with a second synchronous wheel 56, and the first synchronous wheel 55 and the second synchronous wheel 56 are connected by a first synchronous belt 57. Thus, the traction motor 51 drives the single traction wheel 53 to rotate through the reducer 52, the first synchronous wheel 55, the first synchronous belt 57, and the second synchronous wheel 56, so that the wire harness 10 can be smoothly led out of the cylinder of the rotating cage 3.

[0063] In some embodiments, the wire blocking device 6 includes a crescent-shaped outer baffle plate 61, a mounting frame 62, a small arc plate 63 and a roller 64. The small arc plates 63 are fixedly connected to both sides of the mounting frame 62, and the outer side of the small arc plate 63 is fixedly connected to the crescent-shaped outer baffle plate 61. The crescent-shaped outer baffle plate 61 is located between the single traction wheel 53 and the reducer 52. The side of the crescent-shaped outer baffle plate 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 wheel 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 provided in the grooves 65 to reduce the friction between the wiring harness 10 and the small arc plate 63.

[0064] In this embodiment, in order to prevent the wire harness 10 from detaching from the rim of the single traction wheel 53 during high-speed operation 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 semi-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 to ensure that the single traction wheel 53 does not contact the arc surface 66 during rotation. Small arc plates 63 are symmetrically provided on both sides of the mounting frame 62. A plurality of grooves 65 are provided in the middle of the small arc plates 63. Rollers 64 are rotatably provided in the grooves 65 to convert the sliding friction between the wire harness 10 and the small arc plates 63 into rolling friction, thereby achieving the effect of reducing the contact friction between the wire harness 10 and the small arc plates 63.

[0065] In some embodiments, the line-out main shaft 71 of the line-out main shaft assembly 7 is fixedly connected to a third synchronous wheel 75, the output shaft of the main motor 74 is fixedly connected to a fourth synchronous wheel 76, the third synchronous wheel 75 and the fourth synchronous wheel 76 are connected via a second synchronous belt 77, and the main motor 74 drives the line-out main shaft 71 and the rotating cage 3 fixedly connected to the line-out main shaft 71 to rotate via the fourth synchronous wheel 76, the second synchronous belt 77, and the third synchronous wheel 75.

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

[0067] In this embodiment, the right end of the outlet main shaft 71 is threadedly connected to the installation shaft 72, and one end of the installation shaft 72 is provided with an outlet mold 72 for guiding the outlet wire; the other end is sleeved with a collector 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 cage 3 , and a pneumatic disc brake 9 is provided on the main frame 1 . The pneumatic disc brake 9 cooperates with the brake disc 8 to quickly brake the rotating cage 3 .

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

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

[0071] The wire harness 10 formed by twisting a multi-core conductor layered bundle into a strand passes through the wire entry die 28 of the wire entry spindle 21, passes along the lower edge of the wheel groove of the steering wheel 22, and then passes through the guide wheel 42 of the intermediate guide device 4 to enter the wheel flange on one side of the single traction wheel 53. It is wound on the wheel groove of the single traction wheel 53 in a forward or reverse direction according to the twisting process requirements, and is led out to the center of the wheel groove, and then enters the wire exit die 73 of the wire exit spindle 71. Then the main motor 74 drives the rotating cage 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 traction and twisting process.

[0072] In summary, when producing large-section conductors, the single-wheel rotary traction machine provided in the present application is placed at the front end of a large-scale stranding machine, which is equivalent to externalizing the traction force of the internal traction machine of the large-scale stranding machine. Through the traction and rotation action of the single-wheel rotary traction machine, the twisting and traction process is completed in one step at the front end of the large-scale stranding machine entering the wire. The internal traction machine of the large-scale stranding machine needs to adopt a tension mode to reel the wire bundle into the material tray. Therefore, the stranding bow of the large-scale stranding machine will not bear a large radial load and will not break. Since the traction force of the single-wheel rotary traction machine can be designed according to the process requirements to meet the tensile load required for large-section conductors, large-section compressed conductors can be produced. At the same time, the torsional deformation stress of the single-filament conductor is eliminated, making the conductor shape more rounded. Therefore, when the stranded conductor enters the internal traction wheel through the stranding bow, there will be no single-filament jump phenomenon, thereby ensuring production quality and improving production efficiency and product qualification rate.

[0073] In addition, the present application also provides a stranding traction method for large-section conductors, using the single-wheel rotary traction machine, the method comprising the following steps:

[0074] Step S1, externalizing the traction force: placing the single-wheel rotating traction machine at the front end of the large-scale stranding machine, which is equivalent to externalizing the traction force of the internal traction machine of the large-scale stranding machine;

[0075] Step S2, wire guide: The wire harness 10 formed by twisting a multi-core conductor layered bundle into one strand enters the wire threading hole 26 of the wire feed main shaft 21 through the wire feed die 28, and passes between the steering wheel 22 and the first roller 23 to adjust the path and prevent jumping;

[0076] Step S3, intermediate guiding: the wire harness 10 passes through the threading box 41 and the guide wheel 42 and enters the wheel rim on one side of the single traction wheel 53;

[0077] Step S4, twisting and traction: According to the twisting process requirements, the wire harness 10 is wound forward or reversely on the wheel groove of the single traction wheel 53, led out to the center of the wheel groove, and then enters the wire outlet mold 73 of the wire outlet main shaft 71, and then the main motor 74 drives the rotating cage 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 twisting and traction integrated process action.

[0078] The twisting traction method provided by the present application places the single-wheel rotary traction machine at the front end of a large-scale twisting machine, which is equivalent to externalizing the traction force of the internal traction machine of the large-scale twisting machine. Through the traction and rotation action of the single-wheel rotary traction machine, the twisting traction process is completed in one step before the front end of the large-scale twisting machine enters the wire. After the wire harness 10 is twisted and finalized, it enters the twisting bow, reducing the radial load of the twisting bow and avoiding the occurrence of single-wire skipping and twisting 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, avoiding the wire harness from slipping on the wheel groove surface, and ensuring the stability of the twisting pitch; by setting the single-wheel traction assembly at the center of the rotating cage, the centrifugal force of the rotating cage at high speed is reduced, making the operation smoother, and the traction motor is placed inside the rotating cage instead of on the ground, which simplifies the mechanical transmission structure and improves the mechanical efficiency. Therefore, the present application provides a single-wheel rotary traction machine, which realizes efficient stranding traction of large-section conductors by integrating the traction motor 51 into the center of the rotary stranding cage 3, combining the full-circle winding design of the single traction wheel 53 and the roller constraint of the wire blocking device 6. The stranding traction method externalizes the traction force to the front end of the stranding machine, avoids the phenomenon of single-wire skipping and stranding bow breakage, improves the roundness of the conductor, 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 the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A single-wheel rotary tractor, characterized in that: It comprises a main frame (1), an incoming line main shaft assembly (2), a rotating cage (3), an intermediate guide device (4), a single traction wheel assembly (5), a line blocking device (6) and an outgoing line main shaft assembly (7); The incoming wire spindle assembly (2) and the outgoing wire spindle assembly (7) are rotatably connected to two sides of the main frame (1), respectively; the incoming wire spindle assembly (2) comprises an incoming wire spindle (21) for incoming wires of the wire harness (10), and the outgoing wire spindle assembly (7) comprises an outgoing wire spindle (71) for outgoing wires of the wire harness (10); The two ends of the rotating cage (3) are respectively fixedly connected to the incoming line main shaft (21) and the outgoing line main shaft (71); The single traction wheel assembly (5) is arranged in the rotating cage (3) and is located on the central axis of the rotating cage (3), and comprises a traction motor (51), a speed 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 speed reducer (52); The intermediate guide device (4) is fixed in the rotating cage (3) and is used to guide the wire harness (10) from the wire feed main shaft (21) to the single traction wheel (53); The wire blocking device (6) is arranged between the single traction wheel (53) and the reducer (52) and is used to prevent the wire harness (10) from being separated from the rim of the single traction wheel (53) during winding on the single traction wheel (53); The outgoing line spindle assembly (7) further comprises a main motor (74), wherein the main motor (74) is drivingly connected to the outgoing line spindle (71), and the main motor (74) is used to drive the outgoing line spindle (71) and a rotating cage (3) fixedly connected to the outgoing line spindle (71) to rotate and lead out the wire harness (10).

2. A single-wheel rotary traction machine according to claim 1, characterized in that: 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 round bar type mounting plate (24) is symmetrically provided on the side of the wire feeding spindle (21), the round bar type mounting plate (24) is provided with a steering wheel shaft (221), a steering wheel (22) is provided on the outer sleeve of the steering wheel shaft (221), the steering wheel (22) is rotatably arranged on the round bar type mounting plate (24) of the wire feeding spindle (21) through the steering wheel shaft (221), and a 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).

3. A single-wheel rotary traction machine according to claim 2, characterized in that: A first roller (23) having an arcuate outer circumference is provided on one side of the wheel rim of the steering wheel (22) for preventing the wire harness (10) from jumping out of the slot; the first roller (23) is rotatably arranged on a roller shaft (27), and the roller shaft (27) is transversely 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: A first flange (31), a second flange (32), a third flange (33), a fourth flange (34) and a cylindrical flange (35) are provided in the cylinder of the rotary capstan (3); a circular inspection window (36) is provided between the first flange (31) and the second flange (32); a square installation window (37) is provided between the third flange (33) and the fourth flange (34); and the two cylindrical flanges (35) are symmetrically arranged on the inner walls on both sides of the cylinder of the rotary capstan (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 cage (3). The intermediate guide device (4) comprises a threading box (41), a guide wheel (42) and a guide wheel bracket (43). The guide wheel (42) is rotatably arranged on the guide wheel bracket (43). The threading box (41) is a hollow trapezoidal structure for allowing the wire harness (10) to pass through. The cross-sectional area of ​​the threading 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 plane of the wheel groove of the guide wheel (42) coincides with the center plane of the threading box (41), and is used to guide the wire harness (10) into the wheel 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 a reducer (52) via a coupling (58); the output shaft of the reducer (52) is connected to a first synchronous wheel (55); the traction wheel main shaft (54) is connected to a second synchronous wheel (56); the first synchronous wheel (55) and the second synchronous wheel (56) are connected in transmission via a first synchronous belt (57); the traction motor (51) is fixed between a first flange (31) and a second flange (32) of a rotating capstan (3); the reducer (52) is fixed to a third flange (33) of the rotating capstan (3); and the traction wheel main shaft (54) is rotatably arranged on a cylindrical flange (35) of the rotating capstan (3) via a bearing.

7. A single-wheel rotary traction machine according to claim 6, characterized in that: The wire blocking device (6) comprises a crescent-shaped outer baffle plate (61), a mounting frame (62), a small arc plate (63) and a roller (64); the small arc plates (63) are fixedly connected to both sides of the mounting frame (62); the outer side of the small arc plate (63) is fixedly connected to the crescent-shaped outer baffle plate (61); the crescent-shaped outer baffle plate (61) is located between the single traction wheel (53) and the reducer (52); the side of the crescent-shaped outer baffle plate (61) facing the single traction wheel (53) is provided with an arc surface (66); the radius of the arc surface (66) is greater than the wheel rim radius of the single traction wheel (53); the small arc plate (63) is provided with a plurality of grooves (65); the rollers (64) are rotatably arranged in the grooves (65) to reduce the friction between the wire harness (10) and the small arc plate (63).

8. The single-wheel rotary traction machine according to claim 7, characterized in that: The outgoing line main shaft (71) of the outgoing line main shaft assembly (7) is fixedly connected to a third synchronous wheel (75), the output shaft of the main motor (74) is fixedly connected to a fourth synchronous wheel (76), the third synchronous wheel (75) and the fourth synchronous wheel (76) are connected to each other through a second synchronous belt (77), the main motor (74) drives the outgoing line main shaft (71) and the rotary cage (3) fixedly connected to the outgoing line main shaft (71) to rotate through the fourth synchronous wheel (76), the second synchronous belt (77) and the third synchronous wheel (75); the outgoing line main shaft assembly (7) further comprises a mounting shaft (72), the mounting shaft (72) is fixedly connected to one side of the outgoing line main shaft (71), one end of the mounting shaft (72) extends into the outgoing line main shaft (71) and is fixedly connected to an outgoing line mold (73), and the other end is sleeved with a collector ring (78).

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

10. A method for stranding and pulling a large-section conductor, using a single-wheel rotary pulling machine according to any one of claims 1 to 9, the method comprising the following steps: External traction force: the single-wheel rotary traction machine is placed at the front end of the large-scale stranding machine, which is equivalent to externalizing the traction force of the internal traction machine of the large-scale stranding machine; Inlet guide: The wire bundle (10) formed by twisting a multi-core conductor layered bundle into a strand enters the wire threading hole (26) of the inlet main shaft (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) enters the wheel rim on one side of the single traction wheel (53) through the threading box (41) and the guide wheel (42); Twisting and traction: The wire harness (10) is wound forwardly or reversely on the wheel groove of the single traction wheel (53) according to the twisting process requirements, led out to the center of the wheel groove, and then enters the wire outlet mold (73) of the wire outlet main shaft (71). Then the main motor (74) drives the rotating cage (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 twisting and traction integrated process action.

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