A modular twisting machine with variable lay length

Abstract

The present invention relates to the technical field of wire stranding, and more specifically, it relates to a modular wire stranding machine with variable lay pitch, comprising a ship-frame type rotating mechanism, the ship-frame type rotating mechanism is connected to a main driving motor, a wire take-up frame is rotatably connected inside the ship-frame type rotating mechanism, the wire take-up frame is provided with a traction wheel group and a traction drive assembly, the traction wheel group is used for pulling the wire strand for winding, the traction wheel group is connected to the traction drive assembly, and is used for providing traction force for the traction wheel group, the traction wheel group comprises an upper traction wheel and a lower traction wheel for winding the wire strand, the traction drive assembly is a gear group, the gear group comprises an upper gear and a lower gear meshing with each other, the upper gear is coaxially connected to the upper traction wheel, and the lower gear is linked to the ship-frame type rotating mechanism, the wire stranding machine of the present invention has a plurality of lay pitch adjustment modes, and can meet the user's demand for the change mode of the lay pitch of the wire stranding machine by switching different pitch change assemblies.

Description

Technical Field

[0001] The invention relates to the technical field of twisted wires, in particular to a twisting machine with modular twisting length variation. Background Art

[0002] A wire stranding machine is a device specially used to twist and strand multiple metal wires (such as copper wire, aluminum wire or steel wire) or optical fibers to enhance the mechanical strength, flexibility and conductivity of the product while reducing interference. In the wire stranding process, the lay pitch is a key process parameter, which directly affects the performance and application of the final product. The lay pitch of a wire stranding machine refers to the vertical distance that the stranded wire body moves forward after rotating 360 degrees along the stranding axis. The specific value of the lay pitch can be calculated by the speed and line speed of the wire stranding machine. For example, if the speed of the wire stranding machine is 1200 rpm and the line speed is 120 m / min, then the lay pitch is 0.1 m. The wire stranding machine needs to adjust the lay pitch according to real-time production needs, which requires the wire stranding machine to have the function of adjusting the lay pitch.

[0003] For example, a Chinese patent with patent publication number CN104376931B discloses an automatic high-speed wire twisting machine, which includes a high-speed servo motor, a spool, a variable take-up wheel, a fixed take-up wheel, a magnetic powder clutch, a wire arrangement mechanism, a spool seat, and left and right threading shafts symmetrically arranged on both sides of the spool seat. When the lay pitch needs to be adjusted, it is only necessary to select the pulleys with the corresponding number of teeth in the A, B, C, and D groups of pulleys according to the required lay pitch.

[0004] However, the stranding machine in the prior art such as the above has only one lay length adjustment method, and it is difficult to meet the user's demand for the lay length change method of the stranding machine by switching different pitch change components. Summary of the invention

[0005] In order to meet the user's demand for the variation of the lay pitch of a wire stranding machine by switching different pitch-changing components, the present application provides a wire stranding machine with a modular variable lay pitch.

[0006] The present invention provides a modular variable lay length stranding machine that adopts the following technical solution:

[0007] A modular twisting machine with variable lay pitch, comprising a ship-frame rotating mechanism, the ship-frame rotating mechanism is connected to a main driving motor, a take-up frame is rotatably connected in the ship-frame rotating mechanism, the take-up frame is provided with a traction wheel group and a traction drive assembly, the traction wheel group is used to pull the stranded wire for winding, the traction wheel group is connected to the traction drive assembly, and is used to provide traction for the traction wheel group; the traction wheel group comprises an upper traction wheel and a lower traction wheel for winding the stranded wire, the traction drive assembly is a gear group, the gear group comprises an upper gear and a lower gear meshing with each other, the upper gear is coaxially connected to the upper traction wheel, and the lower gear is linked to the ship-frame rotating mechanism; the twisting machine has two lay pitch adjustment modes, the first mode is the gear mode: the lay pitch is adjusted by replacing gears with different numbers of teeth; the second mode is the traction wheel mode, and the lay pitch is adjusted by replacing traction wheels with different diameters.

[0008] Preferably, a traction drive motor is used to replace the gear set, and in this case, the lay length adjustment mode of the stranding machine is an electronic mode: the lay length is adjusted by adjusting the rotation speed of the traction drive motor.

[0009] Preferably, the inner ends of the upper traction wheel and the lower traction wheel of the traction wheel group are both provided with pulleys, and in the gear mode and the electronic mode, the pulley between the upper traction wheel and the lower traction wheel is connected with a belt.

[0010] Preferably, a cavity is provided inside the upper traction wheel, and the cavity of the upper traction wheel is an annular cavity, which extends from the outer end surface of the upper traction wheel to the inside, and a double-layer adjustment ring is provided in the annular cavity, and the double-layer adjustment ring includes an outer ring, an inner ring and a connecting piece, and the connecting piece is connected between the outer ring and the inner ring, and a plurality of balls are provided on the inner diameter surface of the inner ring, and the inner ring is sleeved on the inner diameter surface of the annular cavity of the upper traction wheel through the plurality of balls on its inner diameter surface, and an inner support mechanism is provided on the outer ring, and when the upper traction wheel is rotating, the inner support mechanism contracts, and when the traction drive assembly stops, the inner support mechanism expands.

[0011] Preferably, the inner support mechanism includes a plurality of electric telescopic cylinders, each of which includes a cylinder body and a first telescopic rod, the cylinder body is arranged inside the outer ring, the first telescopic rod extends to the outer diameter surface along the radial direction of the outer ring, and the inner diameter surface of the outer ring is provided with a power supply, the power supply is connected to the electric telescopic cylinder, and the power supply is connected to a controller, the controller is connected to the traction drive component by signal, and when the traction drive component is shut down, the controller controls the power supply to start, so that the inner support mechanism tightens the upper traction wheel.

[0012] Preferably, a plurality of the connecting members are provided, and the connecting members are retractable.

[0013] Preferably, the connecting member is a hydraulic pump, which includes a pump body and a second telescopic rod. When the connection distance between the outer ring and the inner ring needs to be extended, liquid is pumped into the pump body to extend the second telescopic rod. When the connection distance between the outer ring and the inner ring needs to be shortened, the pump body pumps liquid outwards to shorten the second telescopic rod.

[0014] Preferably, a rubber block is provided at the outer end of the first telescopic rod.

[0015] Preferably, a cover plate is detachably provided on the outer end of the upper traction wheel.

[0016] Preferably, the inner end and the outer end of the double-layer adjustment ring are also provided with balls, and the double-layer adjustment ring contacts the inner end of the annular cavity and the inner end of the cover plate through the balls at both ends.

[0017] The beneficial effects of the present invention are:

[0018] 1. The stranding machine of the present invention has a plurality of lay length adjustment modes, and can meet the user's requirements for the lay length change mode of the stranding machine by switching different pitch change components;

[0019] 2. When the upper traction wheel is rotating, the inner support mechanism of the outer ring of the double-layer adjustment ring contracts, so that the outer ring of the double-layer adjustment ring is loosened from the upper traction wheel. At the same time, because the inner ring of the double-layer adjustment ring contacts the upper traction wheel through the ball bearing, the double-layer adjustment ring does not rotate synchronously with the upper traction wheel, thereby reducing the rotation load of the upper traction wheel, thereby reducing the power required to be output by the traction drive component, and having an energy-saving effect;

[0020] 3. When the traction drive assembly stops and the upper traction wheel stops traction, the upper traction wheel will continue to rotate due to inertia. At this time, the inner support mechanism of the outer ring of the double-layer adjustment ring is opened, so that the outer ring of the double-layer adjustment ring supports the upper traction wheel tightly, and the weight of the double-layer adjustment ring provides resistance to prevent the upper traction wheel from continuing to rotate, so that the upper traction wheel stops rotating faster, and finally improves the stop response speed of the upper traction wheel;

[0021] 4. In the traction wheel mode, the advantage of using a hydraulic pump as a connector between the outer ring and the inner ring is that as the diameter of the upper traction wheel increases, the weight of the upper traction wheel increases accordingly, so the inertia of the upper traction wheel increases. When the traction drive assembly stops, if you want to make the upper traction wheel stop faster, you need to provide greater resistance. By using a hydraulic pump to adjust the distance between the outer ring and the inner ring, when the double-layer adjustment ring adapts to the enlargement of the upper traction wheel, the weight of the double-layer traction ring will increase as the liquid is pumped in, and ultimately, it can provide greater resistance for the upper traction wheel during the shutdown stage to ensure timely stopping. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the stranding machine in the gear mode in the embodiment of the present application. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the stranding machine in the gear mode in the embodiment of the present application. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the structure of the stranding machine in the traction wheel mode in the embodiment of the present application. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the structure of the stranding machine in the traction wheel mode in the embodiment of the present application. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the structure of the wire twisting machine in the electronic mode in the embodiment of the present application. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of the structure of the wire twisting machine in the electronic mode in the embodiment of the present application. Figure 2 ;

[0028] Figure 7 is a cross-sectional view of an upper traction wheel in an embodiment of the present application;

[0029] Figure 8 is a cross-sectional view of an upper traction wheel and a double-layer adjustment ring in an embodiment of the present application;

[0030] Explanation of the reference numerals in the accompanying drawings: 11. Left bearing fixing seat; 12. Right bearing fixing seat; 13. Left common rotating shaft; 14. Right threading rotating shaft; 15. Left twisted wire bow seat; 16. Right twisted wire bow seat; 17. Twisted wire bow belt; 18. Guide block; 2. Wire take-up frame; 21. Wire take-up drum; 22. Wire take-up drive motor; 23. Wire arranger; 41. First guide wheel; 42. Second guide wheel; 43. Upper traction wheel; 44. Lower traction wheel; 45. Left tension wheel; 46. Right tension wheel; 61. Upper gear; 62. Lower gear; 7. Traction drive motor; 81. Annular cavity; 82. Outer ring; 83. Inner ring; 84. Electric telescopic cylinder; 85. Hydraulic pump; 86. Cover plate. DETAILED DESCRIPTION

[0031] The following will be combined Figure 1-Figure 8 The present invention is further illustrated by the following embodiments.

[0032] This embodiment discloses a wire stranding machine with modular variable lay length.

[0033] Reference Figure 1 and Figure 2The modular twisting machine with variable lay pitch includes a ship frame type rotating mechanism, which includes a left bearing fixing seat 11 and a right bearing fixing seat 12. The left bearing fixing seat 11 and the right bearing fixing seat 12 are respectively fixed on the left and right inner sides of the casing of the twisting machine, and the axis between the left bearing fixing seat 11 and the right bearing fixing seat 12 is collinear. The left bearing fixing seat 11 and the right bearing fixing seat 12 are respectively provided with a left common rotating shaft 13 and a right threading rotating shaft 14 rotating around the axis, and a main driving motor is connected between the left common rotating shaft 13 and the right threading rotating shaft 14, and a coupling structure is connected between the left common rotating shaft 13 and the right threading rotating shaft 14, so that under the driving action of the main driving motor, the left common rotating shaft 13 and the right threading rotating shaft 14 realize synchronous rotation. The inner end of the left common rotating shaft 13 and the inner end of the right threading rotating shaft 14 are respectively fixedly connected with the left twisted wire bow seat 15 and the right twisted wire bow seat 16. Two twisted wire bow belts 17 are symmetrically arranged between the left twisted wire bow seat 15 and the right twisted wire bow seat 16. A plurality of guide blocks 18 are arranged on the inner sides of the two twisted wire bow belts 17. When the left common rotating shaft 13 and the right threading rotating shaft 14 rotate synchronously, the left twisted wire bow seat 15 and the right twisted wire bow seat 16 are driven to rotate, and then the two twisted wire bow belts 17 are driven to rotate. The function is that when multiple wires are introduced into the guide block 18 of one of the twisted wire bow belts 17 through the right threading rotating shaft 14, the twisting of multiple wires can be achieved by rotating the twisted wire bow belt 17. It should be noted that in order to achieve the threading effect of the right threading rotating shaft 14, the right threading rotating shaft 14 needs to be provided with threading holes along the axial direction.

[0034] Reference Figure 1 and Figure 2 A take-up frame 2 is also rotatably connected between the inner end of the left common rotating shaft 13 and the inner end of the right threading rotating shaft 14. When the left common rotating shaft 13 and the right threading rotating shaft 14 rotate, the take-up frame 2 remains stationary. A take-up drum 21 and a take-up drive motor 22 are provided on the take-up frame 2. The take-up drum 21 is rotatably arranged and connected to the take-up drive motor 22. The take-up drive motor 22 drives the take-up drum 21 to rotate. The rotating take-up drum 21 is used to wind up the twisted wire. Further, the take-up frame 2 is provided with a wire arranger 23. The wire arranger 23 is driven. The wire arranger 23 reciprocates in a direction parallel to the axis of the wire arranger 21 under the drive. The twisted wire bypasses the wire arranger 23 and then is wound onto the wire arranger 21, thereby realizing uniform winding of the wire arranger 21. In order to simplify the driving structure and improve the synchronization between the rotation of the wire take-up drum 21 and the movement of the wire arranger 23, the wire arranger 23 is also moved under the drive of the wire take-up drive motor 22. Specifically, a screw mechanism is provided on the wire take-up frame 2, and the wire arranger 23 is provided on the screw mechanism and controlled by the screw mechanism. The wire take-up drive motor 22 and the screw mechanism are linked by providing a gear reversing box, a belt and a pulley, and finally the synchronous operation of the wire take-up drum 21 and the wire arranger 23 is realized.

[0035] Reference Figure 1 and Figure 2 The inner end of the right threading shaft 14 is provided with a first guide wheel 41, which is located at the outlet of the threading hole of the right threading shaft 14. The first guide wheel 41 is used to guide multiple wires into one of the stranded wire bow belts 17. The inner end of the left common shaft 13 is provided with a second guide wheel 42, which is used to lead the stranded wires of the stranded wire bow belt 17 to the take-up frame 2. The take-up frame 2 is provided with a traction wheel group and a tension wheel group for winding. The stranded wire entering the take-up frame 2 bypasses the traction wheel group and the tension wheel group in turn and then enters the wire arrangement device 23, and is finally wound on the take-up drum 21. Among them, the traction wheel group is used to provide traction for winding, and the tension wheel group is used to adjust the tension of the winding. Specifically, the traction wheel group includes an upper traction wheel 43 and a lower traction wheel 44. The upper traction wheel 43 is connected to a traction drive assembly, and the traction drive assembly is arranged on the take-up frame 2. Therefore, the upper traction wheel 43 is for active traction, and the lower traction wheel 44 is for passive traction. The stranded wire enters from the lower traction wheel 44, and is repeatedly wound between the upper traction wheel 43 and the lower traction wheel 44, and finally winds out from the upper traction wheel 43. The tension wheel group includes a left tension wheel 45 and a right tension wheel 46. The right tension wheel 46 is arranged on the slider module and has the ability to slide left and right. Finally, the tension adjustment effect is achieved by adjusting the distance between the left tension wheel 45 and the right tension wheel 46. The stranded wire enters from the left tension wheel 45, and is repeatedly wound between the left tension wheel 45 and the right tension wheel 46, and finally winds out from the left tension wheel 45. In summary, by setting the first guide wheel 41, the second guide wheel 42, the traction wheel group and the tension wheel group, the effects of guiding, traction and tension adjustment of the stranded wire can be achieved.

[0036] Reference Figures 1 to 4 The traction drive assembly is a gear set, and the gear set includes an upper gear 61 and a lower gear 62 that mesh with each other. The upper gear 61 is coaxially connected to the upper traction wheel 43, and the lower gear 62 and the left common shaft 13 are also linked through a reversing gear box, a pulley and a belt. Therefore, in this embodiment, the driving force of the traction drive assembly is provided by the main drive motor. Based on the setting of the traction drive assembly, the stranding machine of the present invention has two lay pitch adjustment modes. The first mode is the gear mode, that is, by replacing gears with different numbers of teeth, the linear speed of the stranded wire can be adjusted, thereby adjusting the lay pitch. The second mode is the traction wheel mode, that is, by replacing traction wheels with different diameters, the linear speed of the stranded wire can be adjusted, thereby adjusting the lay pitch. Therefore, the stranding machine of the present invention can meet the user's demand for the lay pitch change method of the stranding machine by switching different pitch change components.

[0037] Reference Figure 5 and Figure 6In the remaining embodiments, the traction drive component is the traction drive motor 7. At this time, the rotation speed of the stranded wire during twisting and the linear speed during traction are respectively provided by two different motors. Based on the setting of the traction drive component, the stranding machine of the present invention also has a third lay length adjustment mode: an electronic mode, that is, by adjusting the rotation speed of the traction drive motor 7, the rotation speed ratio between the traction drive motor 7 and the main drive motor can be adjusted, thereby adjusting the lay length, and further by switching different pitch change components to meet the user's requirements for the lay length change method of the stranding machine.

[0038] Reference Figure 1 and Figure 5 It should be noted that the inner ends of the upper traction wheel 43 and the lower traction wheel 44 of the traction wheel group are both provided with pulleys. In the gear mode and the electronic mode, the pulleys between the upper traction wheel 43 and the lower traction wheel 44 are connected with belts to ensure that the rotation of the upper traction wheel 43 and the lower traction wheel 44 is more synchronous.

[0039] Reference Figure 7 and Figure 8In other embodiments, a cavity is provided inside the upper traction wheel 43. Specifically, the cavity of the upper traction wheel 43 is an annular cavity 81, which extends from the outer end surface of the upper traction wheel 43 to the inside of the upper traction wheel 43. The inner diameter of the annular cavity 81 is larger than the inner diameter of the upper traction wheel 43, and the outer diameter of the annular cavity 81 is smaller than the outer diameter of the upper traction wheel 43. A double-layer adjustment ring is provided inside the annular cavity 81, and the double-layer adjustment ring includes an outer ring 82, an inner ring 83, and a connecting piece connecting the inner and outer rings 82. The axes of the outer ring 82 and the inner ring 83 are colinear. Further, the inner diameter of the inner ring 83 of the double-layer adjustment ring is larger than the inner diameter of the annular cavity 81, and the inner diameter surface of the inner ring 83 is provided with a plurality of balls to form a ball surface. The inner ring 83 is sleeved on the inner diameter surface of the annular cavity 81 of the upper traction wheel 43 through the plurality of balls on its inner diameter surface. In addition, the outer diameter of the outer ring 82 of the double-layer adjustment ring is smaller than the outer diameter of the annular cavity 81, and an inner support mechanism is provided on the outer ring 82. Through the above arrangement, when the upper traction wheel 43 is rotating, the inner support mechanism of the outer ring 82 of the double-layer adjustment ring is contracted, so that the outer ring 82 of the double-layer adjustment ring is loosened from the upper traction wheel 43. At the same time, because the inner ring 83 of the double-layer adjustment ring contacts the upper traction wheel 43 through the ball bearing, the double-layer adjustment ring does not rotate synchronously with the upper traction wheel 43, reducing the rotation load of the upper traction wheel 43, thereby reducing the power required to be output by the traction drive assembly, and having an energy-saving effect. When the traction drive assembly is shut down and the upper traction wheel 43 is to be stopped from traction, the upper traction wheel 43 will continue to rotate due to inertia. At this time, the inner support mechanism of the outer ring 82 of the double-layer adjustment ring is opened, so that the outer ring 82 of the double-layer adjustment ring supports the upper traction wheel 43 tightly, and the weight of the double-layer adjustment ring provides resistance to prevent the upper traction wheel 43 from continuing to rotate, so that the upper traction wheel 43 stops rotating faster, and finally improves the stop response speed of the upper traction wheel 43. In summary, by arranging a double-layer regulating wheel in the annular cavity 81 of the upper traction wheel 43, it is possible to take into account both the energy-saving effect of the upper traction wheel 43 during operation and the response speed when shutting down.

[0040] Reference Figure 7 and Figure 8 The inner support mechanism includes a plurality of electric telescopic cylinders 84, the electric telescopic cylinders 84 include a cylinder body and a first telescopic rod, the cylinder body is arranged inside the outer ring 82, and the first telescopic rod extends radially from the outer ring 82 to the outer diameter surface of the outer ring 82. Furthermore, a power supply is arranged on the inner diameter surface of the outer ring 82, the power supply is connected to the electric telescopic cylinder 84, and the power supply is connected to a controller, and the controller is connected to the traction drive assembly signal. When the traction drive assembly stops, the controller controls the power supply of the inner support structure to start, so that the inner support mechanism tightens the upper traction wheel 43 to provide rotation resistance. In addition, a rubber block is arranged at the outer end of the first telescopic rod to increase the contact friction, so that the first telescopic rod has higher stability when tightened.

[0041] Reference Figure 7 and Figure 8The connecting piece between the outer ring 82 and the inner ring 83 is also retractable. The purpose of setting the retractable connecting piece is that when the pitch is adjusted by using the traction wheel mode, the upper traction wheel 43 of different diameters needs to be replaced. Accordingly, the outer diameter of the annular cavity 81 of the upper traction wheel 43 also needs to change. At this time, by retracting the connecting piece, the double-layer adjustment ring can be quickly adapted to the upper traction wheel 43 of different diameters, thereby improving the applicability of the double-layer adjustment ring without preparing multiple specifications. Further, there are multiple connecting pieces, and the connecting piece is a hydraulic pump 85. The hydraulic pump 85 includes a pump body and a second telescopic rod. When the connection distance between the outer ring 82 and the inner ring 83 needs to be extended, liquid is pumped into the pump body to extend the second telescopic rod. When the connection distance between the outer ring 82 and the inner ring 83 needs to be shortened, the pump body pumps liquid outward to shorten the second telescopic rod, thereby realizing the adaptive adjustment of the double-layer adjustment ring. The advantage of using the hydraulic pump 85 as a connecting piece between the outer ring 82 and the inner ring 83 is that as the diameter of the upper traction wheel 43 increases, the weight of the upper traction wheel 43 increases accordingly, so the inertia of the upper traction wheel 43 increases. When the traction drive assembly stops, if you want to make the upper traction wheel 43 stop faster, you need to provide a greater resistance. By using the hydraulic pump 85 to adjust the distance between the outer ring 82 and the inner ring 83, when the double-layer adjustment ring is adapting to the enlargement of the upper traction wheel 43, the weight of the double-layer traction ring will increase as the liquid is pumped in, and ultimately, it can provide a greater resistance for the upper traction wheel 43 during the shutdown stage to ensure timely shutdown.

[0042] Reference Figure 7 and Figure 8 The outer end of the upper traction wheel 43 is detachably provided with a cover plate 86, thereby improving the position stability of the double-layer adjustment ring and facilitating the disassembly and assembly of the double-layer adjustment ring. Furthermore, the inner and outer ends of the double-layer adjustment ring are also provided with balls, which contact the inner end of the annular cavity 81 and the inner end of the cover plate 86 to reduce friction.

[0043] The above are all preferred embodiments of the present invention, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A modular twisting machine with variable lay length, characterized in that: The invention comprises a ship frame type rotating mechanism, wherein the ship frame type rotating mechanism is connected to a main driving motor, wherein a take-up frame (2) is rotatably connected inside the ship frame type rotating mechanism, wherein the take-up frame (2) is provided with a traction wheel group and a traction drive assembly, wherein the traction wheel group is used for pulling the stranded wire for winding, and the traction wheel group is connected to the traction drive assembly and is used for providing traction force for the traction wheel group; the traction wheel group comprises an upper traction wheel (43) and a lower traction wheel (44) for winding the stranded wire, and the traction drive assembly is a gear group, wherein the gear group comprises an upper gear (61) and a lower gear (62) meshing with each other, wherein the upper gear (61) is coaxially connected to the upper traction wheel (43), and the lower gear (62) is linked to the ship frame type rotating mechanism; the stranding machine has two pitch adjustment modes, wherein the first mode is a gear mode: the pitch is adjusted by replacing gears with different numbers of teeth; and the second mode is a traction wheel mode: the pitch is adjusted by replacing traction wheels with different diameters; The upper traction wheel (43) is provided with an annular cavity (81), and the annular cavity (81) extends from the outer end surface of the upper traction wheel (43) to the inside. A double-layer adjustment ring is arranged in the annular cavity (81), and the double-layer adjustment ring comprises an outer ring (82), an inner ring (83) and a connecting piece. The connecting piece is connected between the outer ring (82) and the inner ring (83). A plurality of balls are arranged on the inner diameter surface of the inner ring (83). The inner ring (83) is sleeved on the inner diameter surface of the annular cavity (81) of the upper traction wheel (43) through the plurality of balls on the inner diameter surface. An inner support mechanism is arranged on the outer ring (82). When the upper traction wheel (43) is rotating, the inner support mechanism contracts. When the traction drive assembly stops, the inner support mechanism expands.

2. A modular variable lay length stranding machine according to claim 1, characterized in that: The traction drive motor (7) is used to replace the gear set, and the lay length adjustment mode of the stranding machine is now an electronic mode: the lay length is adjusted by adjusting the rotation speed of the traction drive motor (7).

3. A modular variable lay length stranding machine according to claim 2, characterized in that: The inner ends of the upper traction wheel (43) and the lower traction wheel (44) of the traction wheel group are both provided with pulleys. In the gear mode and the electronic mode, the pulley between the upper traction wheel (43) and the lower traction wheel (44) is connected with a belt.

4. A modular variable lay length stranding machine according to claim 1, characterized in that: The inner support mechanism comprises a plurality of electric telescopic cylinders (84), wherein the electric telescopic cylinders (84) comprise a cylinder body and a first telescopic rod, wherein the cylinder body is arranged inside the outer ring (82), wherein the first telescopic rod extends outwardly along the radial direction of the outer ring (82), and a power source is arranged on the inner diameter surface of the outer ring (82), wherein the power source is connected to the electric telescopic cylinders (84), and the power source is connected to a controller, wherein the controller is connected to the traction drive assembly by signal, and when the traction drive assembly is stopped, the controller controls the power source to start, so that the inner support mechanism tightens the upper traction wheel (43).

5. A modular variable lay length stranding machine according to claim 4, characterized in that: A plurality of connecting members are provided, and the connecting members are retractable.

6. A modular variable lay length stranding machine according to claim 5, characterized in that: The connecting member is a hydraulic pump (85), and the hydraulic pump (85) comprises a pump body and a second telescopic rod. When the connection distance between the outer ring (82) and the inner ring (83) needs to be extended, liquid is pumped into the pump body to extend the second telescopic rod. When the connection distance between the outer ring (82) and the inner ring (83) needs to be shortened, the pump body pumps liquid outward to shorten the second telescopic rod.

7. A modular variable lay length stranding machine according to claim 4, characterized in that: A rubber block is arranged at the outer end of the first telescopic rod.

8. The modular variable lay length stranding machine according to claim 6, characterized in that: The outer end of the upper traction wheel (43) is detachably provided with a cover plate (86).

9. A modular variable lay length stranding machine according to claim 8, characterized in that: The inner and outer ends of the double-layer adjustment ring are also provided with balls, and the double-layer adjustment ring contacts the inner end of the annular cavity (81) and the inner end of the cover plate (86) through the balls at both ends.

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