Torsion-resistant tensile cold-resistant wear-resistant cable for drag chain and twisting device

Abstract

The invention discloses a torsion-resistant tensile cold-resistant wear-resistant cable for a drag chain and a twisting device, and relates to the field of drag chain cables, the torsion-resistant tensile cold-resistant wear-resistant cable comprises a sheath and a plurality of cable core units distributed in the sheath at intervals, each cable core unit is formed by twisting a plurality of core wires and a first tensile member, each core wire is formed by twisting at least two strands of wire harnesses, and the first tensile member is arranged in the sheath. The wire harness is formed by twisting a conductor and a second tensile piece, the periphery of the core wire is coated with an insulating sleeve, the sheath is a thermoplastic polyurethane sheath, and the conductor is a category 6 super flexible conductor. According to the invention, the tensile property and the bending resistance of the cable can be improved.

Description

Technical Field

[0001] The present application relates to the field of drag chain cables, and in particular to a wear-resistant cable and a twisting device for a torsion-resistant, tensile-resistant and cold-resistant drag chain. Background Art

[0002] Drag chain cable is a highly flexible special cable that can move back and forth with the drag chain without being easily worn out. It is called a drag chain cable, and is also commonly called a drag cable.

[0003] Conventional drag chain cables, when operating at high speeds and with a small bend radius, can exert pulling force on the core wire, leading to breakage. This means the tensile and bending resistance of existing drag chain cables needs to be improved. Summary of the Invention

[0004] In order to improve the tensile and bending resistance of the cable, the present application provides a wear-resistant cable and twisting device for a torsion-resistant, tensile-resistant and cold-resistant drag chain.

[0005] The present application provides a wear-resistant cable and twisting device for a torsion-resistant, tensile-resistant and cold-resistant drag chain, which adopts the following technical solutions: A wear-resistant cable for torsion-resistant, tensile-resistant and cold-resistant drag chains, comprising a sheath and a plurality of cable core units spaced apart within the sheath, wherein the cable core unit is formed by twisting a plurality of core wires and a first tensile member, wherein the core wire is twisted together by at least two wire bundles, wherein the wire bundle is twisted together by a conductor and a second tensile member, the core wire is covered with an insulating sheath on its circumference, the sheath is a thermoplastic polyurethane sheath, and the conductor is a Category 6 soft conductor.

[0006] By adopting the above technical solution, first, the conductor adopts Category 6 soft conductor, which is more flexible and can adapt to the small bending radius during the drag chain process, and the conductor and the second tensile member are twisted to form a wire harness, which makes the tensile effect stronger, and the core wires are twisted into strands to form cable core units, which solves the problem of difficulty in sliding between layers during the drag chain process and reduces the risk of core wire breakage; and multiple cable core units are distributed at intervals, that is, there is no problem of core wire breakage due to the torsional stress release of the innermost layer due to the small pitch structure that needs to meet the drag chain performance; the sheath adopts a thermoplastic polyurethane sheath, which makes the cable have high-quality properties such as wear resistance and cold resistance, that is, the tensile and bending resistance of the cable in this application are significantly improved.

[0007] Preferably, a twisted tensile-resistant PP rope is provided in the middle of all the cable core units.

[0008] Preferably, the first tensile member and the second tensile member are both Kevlar.

[0009] Preferably, the insulating sleeve is made of synthetic rubber.

[0010] The cam is secured to the cam frame and has an axially extending flange, which is adapted to engage the guide rollers of the cam frame and to engage the guide rollers of the cam frame.

[0011] By adopting the above technical solution, the wire harnesses are respectively wound on the corresponding unwinding rollers, and the wire harnesses are guided by the first guide group and the second guide wheel, so that all the wire harnesses are twisted at the twisting mechanism. In this process, a traction mechanism will be provided at the front end to pull the twisted core wire, and after a certain length of the core wire is twisted, a cutting operation will be performed to form the core wire of the required length.

[0012] Preferably, a sliding groove is radially opened on the mounting plate, a sliding plate is slidingly connected in the sliding groove, and a compression spring is provided on the mounting plate located in the sliding groove, one end of the compression spring is connected to the sliding plate, and the other end of the compression spring is connected to the bottom wall of the sliding groove; the first guide wheel group is installed on the sliding plate.

[0013] By adopting the above technical solution, in practice, after a certain length of core wire is twisted, the traction mechanism will stop the traction action, and at the same time, the drive motor will stop driving the unwinding disk to rotate, and then the core wire will be cut; after the traction mechanism stops traction, the wire harness will continue to be transported due to the rolling inertia of the unwinding roller and the guide wheel, that is, the wire harness on the side close to the twisting mechanism will be in a relaxed state. If the wire harness is relaxed, during subsequent traction, the wire harness on the side close to the twisting mechanism on one side cannot be twisted immediately with the rotation of the unwinding disk, which will lead to a decrease in the twisting effect and affect the quality of the fresh twisting; in this application, the sliding plate can be made to slide by compressing the spring, thereby ensuring that the wire harness is always in a taut state, thereby ensuring the quality of the core wire.

[0014] Preferably, support plates are symmetrically arranged on the mounting plate, a connecting shaft is rotatably connected between the two support plates, the guide wheel is rotatably connected to the connecting shaft, and a rotating component for driving the guide wheel to rotate is provided on the mounting plate, and the rotation direction of the guide wheel driven by the rotating component is opposite to the rotation direction of the guide wheel in the traction state; a plurality of movable openings are provided in the peripheral array of the guide wheel, the guide wheel is hinged with a paddle in the movable opening, and a driving component for driving the paddle to rotate back and forth outward is provided in the guide wheel; in the initial state, the paddle is received in the movable opening, and when the rotating component drives the guide wheel to rotate, the driving component drives the paddle to rotate back and forth.

[0015] By adopting the above technical solution, under the action of traction, the guide wheel rotates in coordination with the transportation of the wire harness. When the traction is completed, the wire harness becomes loose. At this time, the rotating component drives the guide wheel to rotate in the opposite direction, and at the same time, the driving component drives the paddle plate to rotate back and forth. When the paddle plate extends outward from the outside of the guide wheel, the paddle plate will contact the surface of the wire harness and drive the wire harness to be transported toward the unwinding disk. That is, the friction between the paddle plate and the wire harness can be increased, which facilitates the transportation of the wire harness. By transporting the wire harness, the wire harness close to the twisting mechanism side can be kept in a taut state, thereby improving the twisting quality of the core wire.

[0016] Preferably, a sleeve is formed on the side of the guide wheel, and the sleeve is sleeved on the connecting shaft and forms a rotational fit with the connecting shaft; the rotating assembly includes a rotating motor, a first pulley, a second pulley and a belt, the first pulley is coaxially fixed on the output shaft of the rotating motor, the second pulley is coaxially fixed on the sleeve, and the belt is wound around the first pulley and the second pulley.

[0017] By adopting the above technical solution, during the process of wire harness traction and twisting, the guide wheel will rotate with the movement of the wire harness, and the rotating motor is in a stopped state at this time; when the wire harness is tensioned, the rotating motor is started, and the guide wheel can be reversed through the first pulley, the second pulley and the belt.

[0018] Preferably, a ratchet portion is formed on one of the sleeves, a ring plate is fixedly connected to the connecting shaft, and a pawl is hinged on the ring plate through a torsion spring; the driving assembly includes a cam and an abutment rod, the cam is coaxially fixed on the connecting shaft, and the cam is located in the guide wheel, the abutment rod corresponds to the number of the shift plates, the abutment rod slides radially in the guide wheel, the end of the abutment rod is hinged with a hinged rod, the end of the hinged rod is hinged to the shift plate, and the end of the abutment rod away from the shift plate abuts against the cam; a guide groove is provided in the guide wheel, a guide rod is provided on the abutment rod that slides with the guide groove, and the guide wheel is provided with a return spring in the guide groove, one end of the return spring is connected to the bottom wall of the guide groove, and the other end of the return spring is connected to the guide rod. By adopting the above technical solution, during the process of wire harness pulling and twisting, the guide wheel rotates with the movement of the wire harness, and at this time, with the cooperation of the ratchet pawl, the connecting shaft rotates synchronously with the guide wheel; when the wire harness needs to be tensioned, the rotating motor drives the guide wheel to rotate in the opposite direction. At this time, the connecting shaft does not rotate, and the guide wheel rotates relative to the connecting shaft. When the abutment rod moves to the protruding part of the cam, the abutment rod slides toward the outside of the guide wheel, that is, drives the paddle plate to rotate outward, and when the abutment rod disengages from the protruding part of the cam, the abutment rod drives the paddle plate to reset. In the process of the paddle plate rotating outward and then resetting, the paddle plate contacts the surface of the wire harness and drives the wire harness to move, thereby achieving the tensioning effect of the wire harness.

[0019] Preferably, a locking rod is slidably connected to the mounting plate, a driving cylinder is installed on the mounting plate, the end of the piston rod of the driving cylinder is connected to the locking rod, a telescopic slot is provided at the end of the locking rod, the locking rod is located in the telescopic slot and is slidably connected to a plug-in rod, a special-shaped portion is formed at the end of the plug-in rod, the locking rod is located in the telescopic slot and is provided with a push spring, one end of the push spring is connected to the inner wall of the telescopic slot, and the other end of the push spring is connected to the plug-in rod; a plug-in slot is provided at the end of the connecting shaft, and the special-shaped portion of the plug-in rod is plugged into and fitted with the plug-in slot.

[0020] By adopting the above technical solution, in practice, when the driving assembly drives the guide wheel to reverse, due to the action of the return spring on the abutment rod, there is an abutment force between the abutment rod and the cam, and the action of the torsion spring at the ratchet pawl structure, the guide wheel drives the cam to rotate synchronously when it rotates. Therefore, the connection shaft is locked by the plug-in cooperation between the plug-in rod and the plug-in slot, ensuring the stationary state of the cam, and then ensuring the cooperation between the abutment rod and the cam part, ensuring the effective rotation of the shift plate; in addition, because the cam rotates synchronously with the guide wheel when the wire harness is pulled and transported, and when the traction stops, the stop position of the guide wheel is not fixed, so the plug-in block cannot ensure smooth plugging with the plug-in slot. When it is impossible to plug in directly, the locking rod slides, the plug-in rod abuts against the end of the connecting shaft, and the push spring is compressed. When the guide wheel reverses and drives the connecting shaft to rotate, when the plug-in slot and the plug-in rod are directly facing each other, the special-shaped portion plugs into the plug-in slot to lock the connecting shaft, and at this time the cam just moves to the specified position.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The conductor in the drag chain cable adopts Category 6e soft conductor, which is more flexible and can adapt to the small bending radius during the drag chain process. The conductor and the second tensile member are twisted to form a wire harness, which makes the tensile effect stronger. The core wires are twisted into cable core units, which solves the problem of difficulty in sliding between layers during the drag chain process and reduces the risk of core wire breakage. The multiple cable core units are distributed at intervals, which means that there is no problem of the innermost layer not being able to release the torsional stress due to the small pitch structure required to meet the drag chain performance. The sheath adopts thermoplastic polyurethane sheath, which makes the cable have excellent properties such as wear resistance and cold resistance. 2. During the twisting operation, by driving the guide wheel to reverse, the paddle contacts the surface of the wire harness and drives the wire harness to move in the opposite direction, which can ensure the tension of the wire harness and thus ensure the twisting effect of the subsequent core wires; 3. When the wire harness is twisted during traction and transportation, the guide wheel rotates synchronously with the connecting shaft to prevent the shift plate from rotating and affecting the conveying effect. When the guide wheel is driven to reverse, the plug-in block is plugged into the plug-in slot to fix the connecting shaft, that is, to keep the cam stationary, so that the shift plate can be smoothly rotated. However, since the position of the guide wheel after stopping cannot be guaranteed, the spring is pushed to make the plug-in block and the end of the connecting shaft first in a tight state. Then, when the guide wheel drives the connecting shaft to reverse synchronously, the plug-in slot gradually faces the plug-in block. After corresponding, the plug-in block is smoothly plugged into the plug-in slot to ensure effective locking of the connecting shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic cross-sectional view of a wear-resistant cable for a torsion-resistant, tensile-resistant, and cold-resistant drag chain according to an embodiment of the present application; Figure 2 This is a schematic structural diagram of a wear-resistant cable harness for a torsion-resistant, tensile-resistant, and cold-resistant drag chain according to an embodiment of the present application; Figure 3 This is a schematic diagram of the overall structure of the twisting device embodiment 1 of the present application; Figure 4 This is a partial structural diagram of the first embodiment of the stranding device of the present application, which mainly reflects the structure of the guide wheel; Figure 5 This is a partial structural diagram of the second embodiment of the twisting device of the present application; Figure 6 This is a schematic cross-sectional view of the guide wheel in the second embodiment of the twisting device of the present application, which mainly reflects the structure of the cam; Figure 7 This is a partial structural exploded view of the second embodiment of the twisting device of the present application, which mainly reflects the structure of the rotating assembly; Figure 8 for Figure 7 The partial enlarged view of A in the middle mainly shows the ratchet pawl structure; Figure 9This is a cross-sectional view from another perspective of the guide wheel in the second embodiment of the twisting device of the present application, which mainly shows the structure of the guide groove and the guide rod; Figure 10 This is a schematic cross-sectional view of the locking rod in the second embodiment of the twisting device of the present application; Figure 11 This is a structural diagram of the shift plate in the second embodiment of the twisting device of this application.

[0023] Figure numerals: 1, sheath; 2, cable core unit; 21, tensile PP rope; 3, core wire; 31, insulating sleeve; 4, first tensile member; 5, wire harness; 51, conductor; 52, second tensile member; 6, support frame; 7, unwinding drum; 71, unwinding roller; 72, connecting column; 8, guide mechanism; 81, first guide wheel group; 82, second guide wheel group; 9, twisting mechanism; 10, mounting plate; 101, sliding groove; 102, sliding plate; 1021, support plate; 103, compression spring; 104, driving cylinder; 20, guide wheel; 201, movable opening; 202, dial Plate; 203, sleeve; 2031, ratchet portion; 204, guide groove; 205, return spring; 30, connecting shaft; 301, ring plate; 302, pawl; 304, plug-in slot; 40, rotating assembly; 401, rotating motor; 402, first pulley; 403, second pulley; 404, belt; 50, driving assembly; 501, cam; 502, abutment rod; 5021, hinged rod; 5022, guide rod; 60, locking rod; 601, telescopic slot; 602, plug-in rod; 6021, special-shaped portion; 603, push spring; 70, avoidance plate. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1 -Attached Figure 11 This application is described in further detail.

[0025] The embodiment of the present application discloses a wear-resistant cable for a torsion-resistant, tensile-resistant and cold-resistant drag chain.

[0026] Reference Figure 1 and Figure 2 The torsion-resistant, tensile-resistant, cold-resistant and wear-resistant cable for drag chains includes a sheath 1 and a plurality of cable core units 2 spaced apart in the sheath 1. The cable core unit 2 is formed by twisting a plurality of core wires 3 and a first tensile member 4. The core wire 3 is twisted by at least two wire bundles 5. The wire bundle 5 is twisted by a conductor 51 and a second tensile member 52. The circumferential side of the core wire 3 is covered with an insulating sleeve 31. The insulating sleeve 31 is synthetic rubber. The sheath 1 is a thermoplastic polyurethane sheath. The conductor 51 is a Category 6 soft conductor. A twisted tensile PP rope 21 is provided in the middle of all the cable core units 2.

[0027] The first tensile member 4 and the second tensile member 52 are Kevlar wires.

[0028] In the present application, the conductor 51 adopts a Category 6 soft conductor 51, which is more flexible and can adapt to the small bending radius during the drag chain process. The conductor 51 and the second tensile member 52 are twisted to form a wire harness 5, which makes the tensile effect stronger, and the core wire 3 is twisted into strands to form cable core units 2, which solves the problem of difficulty in sliding between layers during the drag chain process and reduces the risk of the core wire 3 breaking; and multiple cable core units 2 are distributed at intervals, that is, there is no problem of the innermost layer not being able to release the torsional stress due to the small pitch structure that needs to meet the drag chain performance and the core wire 3 breaking; the sheath 1 adopts a thermoplastic polyurethane sheath, which makes the cable have high-quality properties such as wear resistance and cold resistance, that is, the tensile and bending resistance of the cable in the present application are significantly improved.

[0029] The embodiment of the present application also discloses a twisting device.

[0030] Example 1 Reference Figure 3 , a twisting device for twisting the wire harness to form a core wire, including a support frame 6, a reel 7, a guide mechanism 8 and a twisting mechanism 9. The reel 7 is rotatably arranged on the support frame 6, and the reel 7 is driven to rotate by a drive motor. A plurality of reel rollers 71 are arranged in a circumferential array on the reel 7. The reel rollers 71 are used to store the wound wire harness. The reel 7 is fixedly connected to the mounting disk 10 through a connecting column 72, that is, the mounting disk 10 rotates coaxially with the reel 7; the guide mechanism 8 includes a first guide wheel group 81 and a second guide wheel group 82. The number of the first guide wheel groups 81 is the same as the number of the reel 7 and corresponds one to one. The first guide wheel group 81 is fixedly mounted on the mounting disk 10. The first guide wheel group 81 includes two guide wheels 20. A conveying gap is formed between the two guide wheels 20 for conveying and moving the wire harness.

[0031] The connecting post 72 extends toward the side of the mounting plate 10 away from the unwinding plate 7. The number of second guide wheel groups 82 is the same as the number of first guide wheel groups 81 and corresponds one to one. The second guide wheel groups 82 have the same structure as the first guide wheel 20. The second guide wheel groups 82 are mounted on the connecting post 72 and are located on the side close to the twisting mechanism 9. The encircling radius of all second guide wheel groups 82 is smaller than the encircling radius of all first guide wheel groups 81. The twisting mechanism 9 is a conventional structure and is not the focus of this application, so it will not be described in detail. During the twisting operation, the unwinding disk 7 and the mounting disk 10 rotate synchronously, and all the wire harnesses are gathered to the twisting mechanism 9 through the guide mechanism 8 and are pulled and moved by the traction mechanism at the front end, so that all the wire harnesses are twisted.

[0032] Reference Figure 3 and Figure 4The mounting plate 10 is radially provided with a sliding groove 101, and a sliding plate 102 is slidingly connected in the sliding groove 101. The mounting plate 10 is located in the sliding groove 101 and is installed with a compression spring 103. One end of the compression spring 103 is connected to the sliding plate 102, and the other end of the compression spring 103 is connected to the bottom wall of the sliding groove 101. Two support plates 1021 are vertically arranged on the sliding plate 102, and two connecting shafts 30 are installed between the two support plates 1021. The two guide wheels 20 correspond to the two connecting shafts 30 one by one, and the guide wheels 20 are rotatably connected to the connecting shafts 30.

[0033] In actual production, when the core wire stranding reaches the set length, the traction mechanism and the unwinding reel 7 will stop working synchronously and perform the cutting operation. At this time, due to mechanical inertia, the unwinding roller 71 and the guide wheel 20 will continue to rotate to a certain angle, causing the wire harness near the twisting mechanism 9 to become loose. This loose state will prevent the wire harness from immediately entering an effective twisting state upon restart, thereby reducing the twisting effect of the core wire. In this application, the sliding plate 102 can be made to slide by compressing the spring 103 to ensure the tension of the wire harness and thus the twisting quality of the core wire.

[0034] Example 2 Reference Figure 5 This embodiment differs from Embodiment 1 in that two support plates 1021 are fixedly connected to the mounting plate 10, a connecting shaft 30 is rotatably connected to the two support plates 1021, and a rotating assembly 40 is provided on the mounting plate 10 to drive the guide wheel 20. The rotating assembly 40 drives the guide wheel 20 in a direction opposite to the direction of rotation during wire harness traction and transport. A plurality of movable openings 201 are formed in an array around the guide wheel 20. A paddle 202 is hingedly connected to the guide wheel 20 within the movable openings 201. A drive assembly 50 is provided within the guide wheel 20 to drive the paddle 202 to reciprocate outward. Initially, the paddle 202 is retracted within the movable openings 201. When the rotating assembly 40 drives the guide wheel 20 to rotate, the drive assembly 50 drives the paddle 202 to rotate.

[0035] During the traction phase, the guide wheel 20 rotates synchronously with the wire harness. After traction stops, the wire harness becomes slack. At this time, the rotating assembly 40 controls the guide wheel 20 to rotate in the opposite direction, while the driving assembly 50 drives the paddle 202 to oscillate periodically. When the paddle 202 rotates out of the outer edge of the guide wheel 20, its surface contacts the outer sheath of the wire harness, using friction to pull the wire harness back toward the unwinding reel 7. Ultimately, the wire harness is in a relaxed state between the unwinding reel 7 and the mounting reel 10, but this does not affect the subsequent twisting operation. This design effectively improves the efficiency of wire harness transportation by enhancing the frictional force between the wire harness and the mounting reel 10, ensuring that the wire harness near the twisting mechanism 9 remains tensioned at all times, thereby significantly optimizing the twisting effect and quality of the core wires.

[0036] In Example 1, there are certain disadvantages in achieving tensioning of the wire harness by means of the compression spring 103. During the rotation of the unwinding disk 7, the compression spring 103 is affected by the centrifugal force and its state is unstable. This will result in the wire harness not being able to maintain a stable tensioning state during the twisting process, resulting in a decrease in the twisting effect. In the present application, during operation, the guide wheel 20 cannot move, thereby ensuring the consistency of the tensioning of the wire harness. The wire harness will only be tensioned after shutdown, which is convenient for subsequent processing.

[0037] Reference Figure 5 and Figure 7 The guide wheel 20 is formed with a sleeve 203 on both sides. The sleeve 203 is sleeved on the connecting shaft 30 and forms a rotational fit. The rotating assembly 40 includes a rotating motor 401, a first pulley 402, a second pulley 403, and a belt 404. The rotating motor 401 is fixedly mounted on the mounting plate 10. The first pulley 402 is coaxially fixed to the output shaft of the rotating motor 401. The second pulley 403 is coaxially fixed to the sleeve 203. The belt 404 is wound around the first pulley 402 and the second pulley 403.

[0038] During the harness pulling and twisting process, the guide wheel 20 rotates passively due to the movement of the harness, while the rotary motor 401 remains stationary. When the harness needs to be tensioned, the rotary motor 401 is activated. After the motor starts, power is transmitted through the first pulley 402, which, through the transmission of the belt 404, drives the second pulley 403 to rotate, thereby achieving reverse rotation of the guide wheel 20 and completing the tensioning of the harness.

[0039] Reference Figure 6 、 Figure 7 、 Figure 8 and Figure 9 A ratchet portion 2031 is formed on one sleeve 203, a ring plate 301 is fixedly connected to the connecting shaft 30, and a pawl 302 is hinged on the ring plate 301 through a torsion spring. Under the action of the torsion spring, the pawl 302 is pressed tightly against the teeth of the ratchet portion 2031. The driving assembly 50 includes a cam 501 and an abutting rod 502. The cam 501 is coaxially fixed on the connecting shaft 30 and is located in the guide wheel 20. The number of abutting rods 502 and the number of shift plates 202 are the same and correspond one to one. The abutting rod 502 slides radially in the guide wheel 20. The end of the abutting rod 502 is hinged with a hinged rod 5021. The end of the hinged rod 5021 is hinged with the corresponding shift plate 202, and the other end of the abutting rod 502 abuts against the cam 501; a guide groove 204 is radially opened in the guide wheel 20, and a guide rod 5022 is integrally formed on the side of the abutting rod 502. The guide rod 5022 slides in cooperation with the guide groove 204. The guide wheel 20 is located in the guide groove 204 and a return spring 205 is installed. One end of the return spring 205 is connected to the inner wall of the guide groove 204, and the other end is connected to the guide rod 5022.

[0040] During the wire harness pulling and twisting phase, the guide wheel 20 begins to rotate as the wire harness moves. Simultaneously, the ratchet and pawl linkage mechanism forces the connecting shaft 30 to rotate synchronously with the guide wheel 20. When the wire harness tensioning phase begins, the rotary motor 401 activates and drives the guide wheel 20 to rotate in the opposite direction. The one-way locking feature of the ratchet pawl keeps the connecting shaft 30 stationary, allowing the guide wheel 20 to rotate independently of the connecting shaft 30. As the guide wheel 20 rotates, the abutment rod 502 mounted on the guide wheel 20 gradually reaches the protruding portion of the cam 501. Driven by the contour of the cam 501, the abutment rod 502 slides radially outward from the guide wheel 20, causing the shift plate 202 to tilt outward. Once the abutment rod 502 clears the protruding portion of the cam 501, the return spring 205 forces the shift plate 202 back to its initial position. During this reciprocating motion, the shift plate 202 contacts the surface of the wire harness, exerting friction, effectively tensioning the wire harness and ensuring that the appropriate tension is maintained during subsequent processing.

[0041] Reference Figure 5 、 Figure 7 and Figure 10 A driving cylinder 104 is fixedly mounted on the mounting plate 10. The end of the piston rod of the driving cylinder 104 is fixedly connected to the locking rod 60. A telescopic slot 601 is defined at the end of the locking rod 60. A plug rod 602 is slidably connected within the telescopic slot 601. A special-shaped portion 6021 is formed at the end of the plug rod 602. A push spring 603 is installed within the telescopic slot 601 of the locking rod 60. One end of the push spring 603 is connected to the inner wall of the telescopic slot 601, and the other end is connected to the plug rod 602. A plug slot 304 is defined at the end of the connecting shaft 30. The shape of the plug slot 304 matches the shape of the special-shaped portion 6021 of the plug rod 602.

[0042] When the guide wheel 20 rotates in the opposite direction, the return spring 205 continuously applies pressure to the abutment rod 502, maintaining close contact with the cam 501. Simultaneously, the torsion spring in the ratchet-pawl mechanism also acts. Under this dual elastic force, the rotation of the guide wheel 20 simultaneously drives the rotation of the cam 501. At this point, the insertion rod 602 and the insertion slot 304 cooperate to securely lock the connecting shaft 30, ensuring that the cam 501 remains stationary. This locking mechanism ensures stable coordination between the abutment rod 502 and cam 501, allowing the paddle 202 to rotate normally and effectively operate the wiring harness.

[0043] In addition, during the harness traction and transportation process, the cam 501 will rotate synchronously with the guide wheel 20. However, when the traction stops, the final stop position of the guide wheel 20 is random, resulting in the plug-in block not necessarily being accurately aligned with the plug-in slot 304. If the plug-in cannot be successfully connected, when the locking rod 60 slides, the plug-in rod 602 presses against the end of the connecting shaft 30, pushing the spring 603 to be compressed. The guide wheel 20 rotates in the opposite direction and drives the connecting shaft 30 to rotate. Once the plug-in slot 304 is aligned with the plug-in rod 602, the special-shaped portion 6021 will be accurately inserted into the plug-in slot 304 and re-lock the connecting shaft 30. At this time, the cam 501 also rotates to the preset position, ready for subsequent work.

[0044] Example 3 Reference Figure 11 The difference between this embodiment and embodiment 2 is that the front end of the paddle plate 202 is hingedly connected to a avoidance plate 70 via a torsion spring, and the avoidance plate 70 can rotate toward the guide wheel 20. After the wire harness 5 is straightened and tightened, the subsequent twisting operation can be performed. However, at this time, the abutment rod 502 in the guide wheel 20 may just be located at the protruding portion of the cam 501. In this case, the paddle plate 202 is extended from the movable opening 201. At this time, when the wire harness 5 is conveyed during the twisting operation, the guide wheel 20 rotates with the wire harness 5, and the paddle plate 202 contacts the surface of the wire harness 5. When in contact, the avoidance plate 70 rotates under the action of the abutment force to reduce the friction between the avoidance plate 70 and the wire harness 5, ensuring smooth conveyance of the wire harness 5.

[0045] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A wear-resistant cable for torsion-resistant, tensile-resistant and cold-resistant drag chains, characterized by: The invention comprises a sheath (1) and a plurality of cable core units (2) spaced apart in the sheath (1); the cable core unit (2) is formed by twisting a plurality of core wires (3) and a first tensile member (4); the core wire (3) is formed by twisting at least two wire bundles (5); the wire bundle (5) is formed by twisting a conductor (51) and a second tensile member (52); the core wire (3) is covered with an insulating sheath (31) on its circumference; the sheath (1) is a thermoplastic polyurethane sheath; and the conductor (51) is a Category 6 soft conductor.

2. The wear-resistant cable for torsion-resistant, tensile-resistant and cold-resistant drag chains according to claim 1, characterized in that: A twisted tensile-resistant PP rope (21) is provided in the middle of all the cable core units (2).

3. The wear-resistant cable for torsion-resistant, tensile-resistant and cold-resistant drag chains according to claim 1, characterized in that: The first tensile member (4) and the second tensile member (52) are both Kevlar.

4. The wear-resistant cable for torsion-resistant, tensile-resistant and cold-resistant drag chains according to claim 1, characterized in that: The insulating sleeve (31) is made of synthetic rubber.

5. A twisting device for twisting a wire harness to form a core wire, characterized in that: The invention comprises a support frame (6), an unwinding disk (7) rotatably arranged on the support frame (6), a guide mechanism (8) for guiding the wire harness (5), and a twisting mechanism (9); a plurality of unwinding rollers (71) are arranged along the circumference of the unwinding disk (7); the guide mechanism (8) comprises a first guide wheel group (81) and a second guide wheel group (82); a mounting disk (10) is further arranged on the support frame (6); the mounting disk (10) rotates coaxially with the unwinding disk (7); the number of the first guide wheel group (81) and the number of the unwinding rollers (71) are the same. The first guide wheel group (81) is arranged on the mounting plate (10), and the first guide wheel group (81) includes two guide wheels (20). A conveying gap for guiding and conveying the wire harness (5) is formed between the two guide wheels (20). The number of all second guide wheel groups (82) is the same as the number of unwinding rollers (71) and corresponds one to one. The second guide wheel group (82) is located on a side close to the twisting mechanism (9). The surrounding radius of all second guide wheel groups (82) is smaller than the surrounding radius of all first guide wheel groups (81).

6. A twisting device according to claim 5, characterized in that: A sliding groove (101) is radially provided on the mounting plate (10), a sliding plate (102) is slidingly connected in the sliding groove (101), and a compression spring (103) is provided on the mounting plate (100) located in the sliding groove (101), one end of the compression spring (103) is connected to the sliding plate (102), and the other end of the compression spring (103) is connected to the bottom wall of the sliding groove (101); the first guide wheel group (81) is mounted on the sliding plate (102).

7. A twisting device according to claim 5, characterized in that: Support plates (1021) are symmetrically arranged on the mounting plate (10), a connecting shaft (30) is rotatably connected between the two support plates (1021), the guide wheel (20) is rotatably connected to the connecting shaft (30), and a rotating assembly (40) is arranged on the mounting plate (10) for driving the guide wheel (20) to rotate, the rotation direction of the guide wheel (20) driven by the rotating assembly (40) being opposite to the rotation direction of the guide wheel (20) in the traction state; a plurality of movable openings (201) are provided in a circumferential array of the guide wheel (20), the guide wheel (20) is located in the movable opening (201) and is hinged with a shift plate (202), and a driving assembly (50) is arranged in the guide wheel (20) for driving the shift plate (202) to rotate outwardly and reciprocally; in an initial state, the shift plate (202) is accommodated in the movable opening (201), and when the rotating assembly (40) drives the guide wheel (20) to rotate, the driving assembly (50) drives the shift plate (202) to rotate reciprocally.

8. A twisting device according to claim 7, characterized in that: A sleeve (203) is formed on the side of the guide wheel (20), and the sleeve (203) is sleeved on the connecting shaft (30) and forms a rotational fit with the connecting shaft (30); the rotating assembly (40) comprises a rotating motor (401), a first pulley (402), a second pulley (403) and a belt (404), wherein the first pulley (402) is coaxially fixed to the output shaft of the rotating motor (401), the second pulley (403) is coaxially fixed to the sleeve (203), and the belt (404) is wound around the first pulley (402) and the second pulley (403).

9. A twisting device according to claim 8, characterized in that: A ratchet portion (2031) is formed on one of the sleeves (203), a ring plate (301) is fixedly connected to the connecting shaft (30), and a ratchet pawl (302) is hinged on the ring plate (301) via a torsion spring; the driving assembly (50) comprises a cam (501) and an abutment rod (502), the cam (501) is coaxially fixed on the connecting shaft (30), and the cam (501) is located in the guide wheel (20), the abutment rod (502) corresponds to the number of the shifting plates (202), the abutment rod (502) slides radially in the guide wheel (20), and the end of the abutment rod (502) is hinged with a hinge The hinged rod (5021) is hinged to the shift plate (202), and one end of the abutting rod (502) away from the shift plate (202) abuts against the cam (501); a guide groove (204) is provided in the guide wheel (20), and a guide rod (5022) is provided on the abutting rod (502) and is slidably engaged with the guide groove (204); the guide wheel (20) is located in the guide groove (204) and is provided with a return spring (205); one end of the return spring (205) is connected to the bottom wall of the guide groove (204), and the other end of the return spring (205) is connected to the guide rod (5022).

10. A twisting device according to claim 9, characterized in that: A locking rod (60) is slidably connected to the mounting plate (10), a driving cylinder (104) is mounted on the mounting plate (10), an end portion of a piston rod of the driving cylinder (104) is connected to the locking rod (60), a telescopic slot (601) is provided at the end portion of the locking rod (60), the locking rod (60) is located in the telescopic slot (601) and is slidably connected to a plug-in rod (602), a special-shaped portion (6021) is formed at the end portion of the plug-in rod (602), the locking rod (60) is located in the telescopic slot (601) and is provided with a push spring (603), one end of the push spring (603) is connected to the inner wall of the telescopic slot (601), and the other end of the push spring (603) is connected to the plug-in rod (602); a plug-in slot (304) is provided at the end portion of the connecting shaft (30), and the special-shaped portion (6021) of the plug-in rod (602) is plugged into and matched with the plug-in slot (304).

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