Back-twist double-twisting mechanism

Abstract

The invention relates to a back-twist double twisting mechanism, and relates to the field of cable twisting equipment, the back-twist double twisting mechanism comprises a support assembly, a rotating assembly and a transmission assembly, a first vertical plate of the support assembly is provided with a first through hole, a hollow small shaft of the rotating assembly is arranged in the first through hole in a penetrating mode and can rotate, and the transmission assembly drives the hollow small shaft to rotate; the branching plate is connected to the output end of the small hollow shaft, a plurality of branching holes are formed in the branching plate, a limiting assembly for fixing the branching plate and the small hollow shaft is further arranged, the transmission assembly comprises a plurality of synchronous wheels and a synchronous belt, and the support assembly is further provided with a second vertical plate and a stranding die holder. The device has the effect of eliminating the torsion gravitational force.

Description

Technical Field

[0001] This application relates to the field of cable twisting equipment, and more particularly to a double twisting mechanism for untwisting. Background Technology

[0002] With the rapid development of my country's high-speed rail technology, higher requirements have been placed on high-precision railway data communication cables, and the four-core double-twisted star stranding machine plays an important role in the manufacturing process of railway data communication cables.

[0003] For example, the application document with publication number CN222734730U can precisely twist four insulated wires into a star-shaped twisted structure, reducing signal interference between wires, reducing transmission loss, and making the cable core structure more stable and the outer diameter more uniform, laying the foundation for subsequent sheath processing and overall cable performance.

[0004] In the operation of a four-core double-twisted star stranding machine, a single wire passes through the wire feeding device and tension adjustment system before entering the stranding area. Since each wire core is spirally stranded, torsional attraction will inevitably be generated. If these attraction forces are not eliminated, they will cause the wire to deform, damage the internal structure, and affect its electrical performance and mechanical strength. Therefore, it is an urgent problem to solve the issue of providing a mechanism that can eliminate attraction forces. Summary of the Invention

[0005] In order to improve the production quality of railway data communication cables in a four-core double-twisted star stranding machine and eliminate the torsional attraction generated by the single wire passing through the wire release device and tension adjustment system during the stranding process, this application provides a de-twisting double stranding mechanism.

[0006] The technical solution of the un-twisting double-twisting mechanism provided in this application is as follows: A double-twist mechanism for unwinding includes a support assembly, a rotating assembly, and a transmission assembly; The support assembly includes a first upright plate, on which a circular first through hole is formed along a first direction; The rotating component includes: A hollow shaft is coaxially inserted through the first through hole and rotatably connected to the first upright plate around its own central axis; the transmission assembly is connected between the hollow shaft and the first upright plate to drive the hollow shaft to rotate along the first upright plate; one end of the hollow shaft is the driving end and the other end is the output end; And a splitter plate perpendicular to the first direction, the splitter plate being connected to the output end of the hollow small shaft and rotating synchronously with the hollow small shaft; The dividing plate has a dividing hole that communicates with the shaft hole of the hollow small shaft through a first direction. The dividing plate is provided with a plurality of dividing holes, which are evenly distributed in the circumferential direction of the hollow small shaft.

[0007] By adopting the above technical solution, the hollow shaft allows the wire to pass through it; the wire separator can separate and guide the wire passing through the hollow shaft; the transmission component can drive the hollow shaft to rotate along the first vertical plate, thereby un-twisting the wire and eliminating the torsional attraction generated during the twisting of the four-core double-twist star strander.

[0008] Optionally, the end of the dividing hole closest to the first axis of the hollow small shaft is the inner end of the hole, and the inner end of the dividing hole has chamfers at both ends in the first direction.

[0009] By adopting the above technical solution, the chamfering at both ends of the inner end of the splitter hole can prevent the wire from being scratched when passing through the splitter hole, thus protecting the surface quality of the wire.

[0010] Optionally, the splitter plate is disc-shaped, and the splitter hole penetrates the outer peripheral wall of the splitter plate.

[0011] By adopting the above technical solution, the splitter plate is disc-shaped and the splitter hole penetrates the outer peripheral wall, which allows the wire to be inserted into the splitter hole in a variety of ways, such as passing through along the first direction or being inserted radially along the splitter plate.

[0012] Optionally, the coaxial connector of the splitter plate is inserted into the hollow small shaft.

[0013] By adopting the above technical solution, the hollow shaft can block the wire body to prevent it from detaching from the splitter plate.

[0014] Optionally, one end of the splitter plate is flush with the output end wall of the hollow small shaft; The output end wall of the hollow shaft has multiple slots, which are evenly distributed around the circumference of the hollow shaft. The outer peripheral wall of the splitter plate is fixedly connected with a block inserted into the slot. In the first direction, the thickness of the block is less than the thickness of the splitter plate. It also includes a limiting assembly for fixing the dividing plate to the hollow small shaft.

[0015] By adopting the above technical solution, the end wall of the splitter plate and the output end of the hollow shaft are flush. With the help of the card block inserted into the slot, a reliable connection between the splitter plate and the hollow shaft is achieved, ensuring that the splitter plate can rotate synchronously with the hollow shaft. The limiting component further fixes the splitter plate to the hollow shaft, enhancing the stability of the connection between the two.

[0016] Optionally, the limiting component includes a limiting sleeve coaxial with the hollow small shaft and a stop sleeve coaxial with the hollow small shaft. The inner ring of the limiting sleeve is in the shape of a three-stage stepped hole. In the direction from the drive end to the output end of the hollow small shaft, the inner diameter of the three sections of the limiting sleeve gradually decreases, and the three sections are respectively the first insertion hole, the second insertion hole and the third insertion hole. The output end of the hollow small shaft is coaxially inserted into the first insertion hole, and the limiting sleeve has multiple limiting protrusions protruding from the inner wall of the first insertion hole. The multiple limiting protrusions are evenly distributed in the circumferential direction of the limiting sleeve. The hollow shaft has multiple L-shaped limiting grooves on the outer peripheral wall of the output end. Each limiting groove is used to accommodate a limiting protrusion. The limiting groove includes an insertion section parallel to the first direction and a limiting section arranged along the circumference of the hollow shaft. After the limiting protrusion is inserted into the limiting groove along the insertion section, it can rotate around the hollow shaft into the limiting section. In the first direction, one end of the stop sleeve is located outside the limiting sleeve, and the other end passes through the third and second insertion holes and extends into the first insertion hole to abut against the splitter plate; a first stop ring is coaxially and fixedly connected to the outer periphery of the stop sleeve near the splitter plate, which abuts against the splitter plate and the hollow small shaft. The outer diameter of the first stop ring is smaller than the inner diameter of the first insertion hole and larger than the inner diameter of the second insertion hole. A second stop ring located outside the limiting sleeve is coaxially and fixedly connected to the outer circumference of the stop sleeve. A compression spring is fitted around the outer periphery of the stop sleeve and located inside the second insertion hole. One end of the compression spring abuts against the first stop ring, and the other end abuts against the stepped surface between the second insertion hole and the third insertion hole.

[0017] By adopting the above technical solution, the cooperation between the L-shaped limiting groove and the limiting protrusion realizes the initial limiting of the limiting sleeve and the hollow shaft in the first direction. The compression spring provides axial preload, ensuring the tight connection between the dividing plate and the hollow shaft, and at the same time buffering the impact force generated during rotation.

[0018] Optionally, at the end of the limiting section away from the insertion section, the outer peripheral wall of the hollow shaft is recessed to form a locking groove on the side facing the output end wall of the hollow shaft. The locking groove is used for the insertion of the limiting protrusion.

[0019] By adopting the above technical solution, the locking groove allows the limiting protrusion to be inserted, which further enhances the connection stability between the limiting sleeve and the hollow small shaft and prevents the limiting sleeve from loosening during long-term use.

[0020] Optionally, in the first direction, the first upright plate is located between the limiting component and the transmission component; the transmission component includes: The first synchronous pulley is coaxially sleeved and fixed to the outer periphery of the drive end of the hollow small shaft; The second synchronous pulley is located to the side of the first synchronous pulley; The first synchronous belt is tensioned and wound between the first synchronous pulley and the second synchronous pulley.

[0021] By adopting the above technical solution, when torque is input to the second synchronous pulley, the power can be transmitted from the second synchronous pulley to the first synchronous pulley through the transmission of the first synchronous belt, thereby driving the hollow shaft to rotate and realizing power transmission to drive the rotating component to work.

[0022] Optionally, the transmission assembly further includes: A fixed shaft coaxially fixed and sleeved within the second synchronous pulley via a bearing; A third synchronous pulley is coaxially fixed and sleeved on the outer periphery of the fixed shaft via a bearing. In a first direction, the third synchronous pulley is located at the end of the second synchronous pulley away from the first vertical plate; the second synchronous pulley and the third synchronous pulley are connected by screws. A hollow main shaft coaxial with the hollow small shaft, the hollow main shaft being located outside the input end of the hollow small shaft; the hollow main shaft is not connected to the hollow small shaft, and serves as the power input end; A fourth synchronous pulley is coaxially fixedly connected to the outside of the hollow main shaft; And a second timing belt tensioned and wound between the third and fourth timing pulleys.

[0023] By adopting the above technical solution, the hollow main shaft drives the fourth synchronous pulley to rotate, the fourth synchronous pulley drives the third synchronous pulley to rotate through the second synchronous belt, the third synchronous pulley drives the second synchronous pulley to rotate through the screw, and the second synchronous pulley drives the first synchronous pulley to rotate through the first synchronous belt, ultimately driving the hollow small shaft to rotate; the hollow main shaft is connected to other power sources to provide power to the entire transmission assembly.

[0024] Optionally, the support assembly further includes: A second upright plate is fixedly connected to the first upright plate, and the second upright plate is located on the side of the first upright plate away from the transmission assembly; a second through hole is provided on the second upright plate along the first direction; In addition, a twisting mold base is coaxially inserted into the second through hole and fixedly connected to the second upright plate. The twisting mold base has a twisting hole coaxially inserted along the first direction and coaxial with the first through hole.

[0025] By adopting the above technical solution, the stranding die can provide a convergence point for the wires separated by the wire separator, so that they can enter the next operation step.

[0026] In summary, this application includes at least one of the following beneficial technical effects: The transmission component transmits power to the rotating component, causing the hollow shaft and the wire separator to rotate synchronously. This eliminates the torsional force generated by the twisting of the wires, preventing wire deformation and damage to the internal structure. The wire splitting holes on the splitter board are evenly distributed around the hollow small shaft, which can separate and guide the wires passing through the hollow small shaft; The support frame provides stable support for the entire mechanism, ensuring its normal operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the rotating component in an embodiment of this application; Figure 3 This is a schematic diagram of the splitter board in an embodiment of this application; Figure 4 This is an exploded structural diagram of the splitter plate and hollow small shaft in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the limiting component in the embodiments of this application; Figure 6 This is a schematic diagram of the structure of the limiting sleeve in the embodiments of this application; Figure 7 This is a schematic diagram of the transmission component in an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Support assembly; 11. First upright plate; 111. First through hole; 112. Flange sleeve; 113. Bearing; 12. Second upright plate; 121. Second through hole; 13. Twisting mold base; 131. Twisting hole; 14. Connecting rod; 15. Base plate; 2. Rotating assembly; 21. Hollow small shaft; 211. Drive end; 212. Output end; 213. Slot; 214. Limiting slot; 2141. Insertion section; 2142. Limiting section; 2143. Locking slot; 22. Divider plate; 221. Divider... 1. Wire hole; 2211. Chamfer; 23. Locking block; 3. Transmission assembly; 31. First synchronous pulley; 32. Second synchronous pulley; 33. First synchronous belt; 34. Fixed shaft; 35. Third synchronous pulley; 36. Hollow spindle; 37. Fourth synchronous pulley; 38. Second synchronous belt; 4. Limiting assembly; 41. Limiting sleeve; 411. First insertion hole; 412. Second insertion hole; 413. Third insertion hole; 414. Limiting protrusion; 42. Stop sleeve; 43. First stop ring; 44. Second stop ring; 45. Compression spring. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail. For ease of description, this application introduces directional terms such as "first direction," which can be seen in the figure below, where X represents the first direction.

[0030] This application discloses a double-twist mechanism for unwinding. (Refer to...) Figure 1 and Figure 2 The untwisting and double-twisting mechanism includes a support assembly 1, a rotating assembly 2, and a transmission assembly 3. The transmission assembly 3 is connected between the rotating assembly 2 and the support assembly 1 and is used to drive the rotating assembly 2 to rotate along the support assembly 1, thereby realizing the untwisting and double-twisting functions of the wire and eliminating the torsional attraction generated during the twisting of the four-core double-twisting star twister.

[0031] Reference Figure 1 and Figure 2 The support assembly 1 includes a first upright plate 11, on which a circular first through hole 111 is formed along a first direction.

[0032] Reference Figure 2 The rotating assembly 2 includes a hollow shaft 21 and a wire divider 22 perpendicular to the first direction. The hollow shaft 21 is coaxially inserted through the first through hole 111 and rotatably connected to the first vertical plate 11 around its own central axis. One end of the hollow shaft 21 is the driving end 211, and the other end is the output end 212. The design of the hollow shaft 21 allows the wire to pass through its interior. To install the hollow shaft 21, a flange sleeve 112 can be provided between the hollow shaft 21 and the first through hole 111. The hollow shaft 21 can be rotatably connected to the flange sleeve 112 through a bearing 113 to ensure its rotational flexibility and stability.

[0033] Reference Figure 2 and Figure 3 The wire splitter plate 22 is perpendicular to the first direction and connected to the output end 212 of the hollow shaft 21, rotating synchronously with the hollow shaft 21. A wire splitting hole 221, communicating with the shaft hole of the hollow shaft 21, is formed through the wire splitter plate 22 along the first direction. Multiple wire splitting holes 221 are provided on the wire splitter plate 22, evenly distributed around the circumference of the hollow shaft 21. In this embodiment, four wire splitting holes 221 are provided on the wire splitter plate 22. The function of the wire splitter plate 22 is to separate and guide the wire passing through the hollow shaft 21. The end of the wire splitting hole 221 closest to the first axis of the hollow shaft 21 is the inner end of the hole. Chamfers 2211 are provided at both ends of the inner end of the wire splitting hole 221 in the first direction. The chamfers 2211 prevent the wire from being scratched when passing through the wire splitting hole 221, protecting the surface quality of the wire. The splitter plate 22 is a disc-shaped structure perpendicular to the first direction, and the splitter hole 221 penetrates the outer peripheral wall of the splitter plate 22. This design allows the wire to be inserted into the splitter hole 221 in a variety of ways, such as passing through along the first direction or being inserted radially along the splitter plate 22.

[0034] Reference Figure 3 and Figure 4The splitter plate 22 is fitted with a coaxial connector inserted into the hollow shaft 21, with one end of the splitter plate 22 flush with the end wall of the output end 212 of the hollow shaft 21. The end wall of the output end 212 of the hollow shaft 21 has multiple slots 213. In this embodiment, four slots 213 are provided, evenly distributed around the circumference of the hollow shaft 21. A locking block 23 is fixedly connected to the outer peripheral wall of the splitter plate 22, inserted into each slot 213. Each slot 213 contains a corresponding locking block 23. In the first direction, the thickness of the locking block 23 is less than the thickness of the splitter plate 22. This cooperation between the locking block 23 and the slot 213 ensures a reliable connection between the splitter plate 22 and the hollow shaft 21, guaranteeing that the splitter plate 22 can rotate synchronously with the hollow shaft 21.

[0035] Reference Figure 4 , Figure 5 and Figure 6 In order to snap the splitter plate 22 onto the hollow shaft 21 along the first direction, some embodiments of this application also include a limiting component 4 for fixing the splitter plate 22 to the hollow shaft 21; the limiting component 4 includes a limiting sleeve 41 coaxial with the hollow shaft 21 and a stop sleeve 42 coaxial with the hollow shaft 21. The inner ring of the limiting sleeve 41 is in the shape of a three-stage stepped hole. In the direction from the driving end 211 to the output end 212 of the hollow small shaft 21, the inner diameter of the three sections of the limiting sleeve 41 gradually decreases, and the three sections are the first insertion hole 411, the second insertion hole 412 and the third insertion hole 413, respectively. The output end 212 of the hollow small shaft 21 is coaxially inserted into the first insertion hole 411. The limiting sleeve 41 has multiple limiting protrusions 414 protruding from the inner wall of the first insertion hole 411. One end of the limiting protrusion 414 is flush with the end wall of the limiting sleeve 41 with the first insertion hole 411, and the other end is spaced from the stepped surface formed between the first insertion hole 411 and the second insertion hole 412. The multiple limiting protrusions 414 are evenly distributed around the circumference of the limiting sleeve 41. The hollow shaft 21 has multiple L-shaped limiting grooves 214 on the outer peripheral wall of the output end 212. Each limiting groove 214 is used to accommodate a limiting protrusion 414. The limiting groove 214 includes an insertion section 2141 parallel to the first direction and a limiting section 2142 arranged circumferentially around the hollow shaft 21. After the limiting protrusion 414 is inserted into the limiting groove 214 in the first direction within the insertion section 2141, it can rotate circumferentially around the hollow shaft 21 into the limiting section 2142. This cooperation between the L-shaped limiting groove 214 and the limiting protrusion 414 achieves the initial limiting of the limiting sleeve 41 and the hollow shaft 21 in the first direction. Each slot 213 is connected to the insertion section 2141 of a corresponding limiting groove 214. The outer peripheral wall of the hollow shaft 21 has a locking groove 2143 recessed at the end of the limiting section 2142 away from the insertion section 2141, facing the end wall of the output end 212 of the hollow shaft 21. The locking groove 2143 is used for the limiting protrusion 414 to be inserted in the first direction, and the limiting protrusion 414 will be hooked in the locking groove 2143. The design of the locking groove 2143 further enhances the connection stability between the limiting sleeve 41 and the hollow shaft 21, and prevents the limiting sleeve 41 from loosening during long-term use, under the limiting of the compression spring 45.

[0036] Reference Figure 5 and Figure 6 In the first direction, one end of the stop sleeve 42 is located outside the limiting sleeve 41, and the other end passes through the third insertion hole 413 and the second insertion hole 412 and extends into the first insertion hole 411 to abut against the splitter plate 22; a first stop ring 43 is coaxially and fixedly connected to the outer periphery of the stop sleeve 42 near the splitter plate 22, which abuts against the splitter plate 22 and the hollow small shaft 21. The outer diameter of the first stop ring 43 is smaller than the inner diameter of the first insertion hole 411 and larger than the inner diameter of the second insertion hole 412; a second stop ring 44 located outside the limiting sleeve 41 is coaxially and fixedly connected to the outer periphery of the stop sleeve 42. A compression spring 45 is fitted around the outer periphery of the stop sleeve 42 and located in the second slot. The compression spring 45 is in a compressed state, with one end of the compression spring 45 abutting against the first stop ring 43 and the other end abutting against the stepped surface between the second insertion hole 412 and the third insertion hole 413. The function of the compression spring 45 is to provide axial preload, ensuring a tight connection between the dividing plate 22 and the hollow small shaft 21, and also to buffer the impact force generated during rotation.

[0037] Reference Figure 7 In the first direction, the first upright plate 11 is located between the limiting component 4 and the transmission component 3, and the transmission component 3 is connected between the hollow shaft 21 and the first upright plate 11 to drive the hollow shaft 21 to rotate along the first upright plate 11. The transmission component 3 includes a first synchronous pulley 31, a second synchronous pulley 32 and a first synchronous belt 33; the first synchronous pulley 31 is coaxially sleeved and fixed to the outer periphery of the drive end 211 of the hollow shaft 21, the second synchronous pulley 32 is located to the side of the first synchronous pulley 31, and the first synchronous belt 33 is tensioned and wrapped between the first synchronous pulley 31 and the second synchronous pulley 32; torque is input to the first synchronous pulley 31, thereby driving the hollow shaft 21 to rotate; the first synchronous pulley 31 and the second synchronous pulley 32 can be toothed synchronous pulleys to ensure the accuracy and stability of the transmission.

[0038] Reference Figure 7In some embodiments of this application, the transmission assembly 3 further includes a fixed shaft 34 coaxially fixed within the second synchronous pulley 32 via a bearing 113, a third synchronous pulley 35 coaxially fixed to the outer periphery of the fixed shaft 34 via a bearing 113, a hollow main shaft 36 coaxial with the hollow small shaft 21, a fourth synchronous pulley 37 coaxially fixed to the outside of the hollow main shaft 36, and a second synchronous belt 38 tensioned and wound between the third synchronous pulley 35 and the fourth synchronous pulley 37; in the first direction, the hollow main shaft 36 is positioned... Outside the input end of the hollow small shaft 21, the third synchronous pulley 35 is located at the end of the second synchronous pulley 32 away from the first vertical plate 11; through the transmission of the second synchronous belt 38, the power is transmitted from the fourth synchronous pulley 37 to the third synchronous pulley 35, and the third synchronous pulley 35 drives the second synchronous pulley 32 to rotate through the screw, further realizing the transmission of power; the hollow main shaft 36 can be connected to the power output end 212 of the four-core double-twisted star winch to realize that the same power source drives the four-core double-twisted star winch and the rotating component 2 to rotate.

[0039] Reference Figure 7 The support assembly 1 also includes a second upright plate 12 and a twisting mold base 13. The second upright plate 12 is perpendicular to the first direction and is located on the side of the first upright plate 11 away from the transmission assembly 3. A plurality of connecting rods 14 parallel to the first direction are fixedly connected between the second upright plate 12 and the first upright plate 11. A second through hole 121 is provided through the second upright plate 12 along the first direction. The twisting mold base 13 is cylindrical and coaxial with the hollow small shaft 21, and is coaxially inserted into the second through hole 121 and fixedly connected to the second upright plate 12. A twisting hole 131 coaxial with the first through hole 111 is provided through the twisting mold base 13 along the first direction. The four wires separated by the wire divider 22 converge in the twisting hole 131 and enter the next operation step.

[0040] Reference Figure 7 The support assembly 1 also includes a base plate 15, one end of which is fixedly connected to the first upright plate 11, and the other end extends toward the second upright plate 12. Both the first upright plate 11 and the second upright plate 12 are perpendicular to the base plate 15. The base plate 15 is fixedly installed in the cradle frame of the four-core star winch by screws, thereby connecting the device with the four-core star winch.

[0041] The implementation principle of the double-twisting mechanism according to this application embodiment is as follows: power is transmitted to the rotating component 2 through the transmission component 3, causing the hollow shaft 21 and the wire separating plate 22 to rotate synchronously. When the wire passes through the hollow shaft 21 and is separated through the wire separating hole 221 of the wire separating plate 22, it enters the twisting die 13 for merging. In this process, the rotation of the rotating component 2 can effectively eliminate the torsional attraction of the wire caused by twisting, avoiding wire deformation and damage to the internal structure. At the same time, the support component 1 provides stable support for the entire mechanism, ensuring the normal operation of the mechanism.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double-twist unwinding mechanism, characterized in that, It includes a support assembly (1), a rotating assembly (2), and a transmission assembly (3); The support assembly (1) includes a first upright plate (11), and a circular first through hole (111) is formed on the first upright plate (11) along a first direction; The rotating component (2) includes: A hollow shaft (21) is coaxially inserted through the first through hole (111) and rotatably connected to the first upright plate (11) around its own central axis; the transmission assembly (3) is connected between the hollow shaft (21) and the first upright plate (11) to drive the hollow shaft (21) to rotate along the first upright plate (11); one end of the hollow shaft (21) is a driving end (211) and the other end is an output end (212); And a splitter plate (22) perpendicular to the first direction, the splitter plate (22) being connected to the output end (212) of the hollow small shaft (21) and rotating synchronously with the hollow small shaft (21); The dividing plate (22) has a dividing hole (221) through it along the first direction, which communicates with the shaft hole of the hollow small shaft (21). The dividing plate (22) is provided with a plurality of dividing holes (221), which are evenly distributed around the hollow small shaft (21).

2. The double-twist unwinding mechanism according to claim 1, characterized in that, The end of the dividing hole (221) near the first axis of the hollow small shaft (21) is the inner end of the hole, and the inner end of the dividing hole (221) has chamfers (2211) at both ends in the first direction.

3. The double-twist unwinding mechanism according to claim 2, characterized in that, The dividing plate (22) is disc-shaped, and the dividing hole (221) penetrates the outer peripheral wall of the dividing plate (22).

4. The double-twist unwinding mechanism according to claim 3, characterized in that, The coaxial connector adapted to the splitter plate (22) is inserted into the hollow small shaft (21).

5. The double-twist unwinding mechanism according to claim 4, characterized in that, One end of the dividing plate (22) is flush with the end wall of the output end (212) of the hollow small shaft (21); The output end (212) of the hollow shaft (21) has multiple slots (213) on its end wall. The multiple slots (213) are evenly distributed around the hollow shaft (21). The outer peripheral wall of the splitter plate (22) is fixedly connected with a block (23) inserted into the slot (213). In the first direction, the thickness of the block (23) is less than the thickness of the splitter plate (22). It also includes a limiting assembly (4) for fixing the dividing plate (22) to the hollow small shaft (21).

6. The double-twist unwinding mechanism according to claim 5, characterized in that, The limiting component (4) includes a limiting sleeve (41) coaxial with the hollow small shaft (21) and a stop sleeve (42) coaxial with the hollow small shaft (21); The inner ring of the limiting sleeve (41) is in the shape of a three-stage stepped hole. In the direction from the driving end (211) to the output end (212) of the hollow small shaft (21), the inner diameter of the three sections of the limiting sleeve (41) gradually decreases, and the three sections are the first insertion hole (411), the second insertion hole (412) and the third insertion hole (413). The output end (212) of the hollow small shaft (21) is coaxially inserted into the first insertion hole (411). The limiting sleeve (41) has multiple limiting protrusions (414) protruding from the inner wall of the first insertion hole (411). The multiple limiting protrusions (414) are evenly distributed in the circumferential direction of the limiting sleeve (41). The hollow shaft (21) has a plurality of L-shaped limiting grooves (214) on the outer peripheral wall of the output end (212). Each limiting groove (214) is used to accommodate a limiting protrusion (414). The limiting groove (214) includes an insertion section (2141) parallel to the first direction and a limiting section (2142) arranged circumferentially along the hollow shaft (21). After the limiting protrusion (414) is inserted into the limiting groove (214) along the insertion section (2141), it can rotate circumferentially around the hollow shaft (21) into the limiting section (2142). In the first direction, one end of the stop sleeve (42) is located outside the limiting sleeve (41), and the other end passes through the third insertion hole (413) and the second insertion hole (412) and extends into the first insertion hole (411) to abut against the dividing plate (22); the outer periphery of the stop sleeve (42) near the dividing plate (22) is coaxially fixedly connected to a first stop ring (43) that abuts against the dividing plate (22) and the hollow small shaft (21). The outer diameter of the first stop ring (43) is smaller than the inner diameter of the first insertion hole (411) and larger than the inner diameter of the second insertion hole (412); The stop sleeve (42) is coaxially and fixedly connected to a second stop ring (44) located outside the limiting sleeve (41); The stop sleeve (42) is fitted with a compression spring (45) located in the second insertion hole (412) on its outer periphery. One end of the compression spring (45) abuts against the first stop ring (43), and the other end abuts against the stepped surface between the second insertion hole (412) and the third insertion hole (413).

7. The double-twist unwinding mechanism according to claim 6, characterized in that, The outer peripheral wall of the hollow shaft (21) has a locking groove (2143) recessed at the end of the limiting section (2142) away from the insertion section (2141) and facing the end wall of the output end (212) of the hollow shaft (21). The locking groove (2143) is used for the insertion of the limiting protrusion (414).

8. A double-twist unwinding mechanism according to any one of claims 5-7, characterized in that, In a first direction, the first upright plate (11) is located between the limiting component (4) and the transmission component (3); the transmission component (3) includes: The first synchronous pulley (31) is coaxially sleeved and fixed to the outer periphery of the drive end (211) of the hollow small shaft (21); The second synchronous pulley (32) is located to the side of the first synchronous pulley (31); The first synchronous belt (33) is tensioned and wound between the first synchronous pulley (31) and the second synchronous pulley (32).

9. A double-twist unwinding mechanism according to claim 8, characterized in that, The transmission assembly (3) also includes: A fixed shaft (34) is coaxially fixed and sleeved within the second synchronous pulley (32) via a bearing; A third synchronous pulley (35) is coaxially fixed and sleeved on the outer periphery of the fixed shaft (34) via a bearing. In the first direction, the third synchronous pulley (35) is located at the end of the second synchronous pulley (32) away from the first vertical plate (11); the second synchronous pulley (32) and the third synchronous pulley (35) are connected by screws. A hollow main shaft (36) is coaxial with the hollow small shaft (21), and the hollow main shaft (36) is located outside the input end of the hollow small shaft (21); it is not connected to the hollow small shaft (21), and the hollow main shaft (36) is the power input end; A fourth synchronous pulley (37) is coaxially fixedly connected to the outside of the hollow main shaft (36); And a second timing belt (38) tensioned and wound between the third timing pulley (35) and the fourth timing pulley (37).

10. A double-twist unwinding mechanism according to claim 9, characterized in that, The support assembly (1) further includes: A second vertical plate (12) is fixedly connected to the first vertical plate (11), and the second vertical plate (12) is located on the side of the first vertical plate (11) away from the transmission assembly (3); a second through hole (121) is provided on the second vertical plate (12) along the first direction; And, a twisting mold base (13), which is coaxially inserted in the second through hole (121) and fixedly connected to the second upright plate (12), and a twisting hole (131) coaxially inserted in the first direction and coaxially inserted in the twisting mold base (13) with the first through hole (111).

Images