Automatic untwisting device for preventing cross-twist of a spiral cable

Abstract

The application relates to an automatic untwisting device for preventing cross confusion of spiral cables, which comprises a frame, a mutual connection of an unwinding head and an unwinding shaft, an untwisting head arranged on one side of the frame of the unwinding shaft, a chuck connected to the untwisting head and a translation driving mechanism arranged on the frame and capable of driving the untwisting head to move back and forth, the untwisting head comprising a base, a rotating disc rotatably connected to the base and parallel to the unwinding shaft and an untwisting driver fixedly connected to the rotating disc and used for driving the chuck to rotate. The untwisting driver is supported by the rotating disc rotatably connected to the base, the chuck can rotate along a plane parallel to the plane where the rotating disc is located, the chuck can gradually rotate along with the movement of the unwinding end of the right-rotation cable, the axial direction of the chuck can always be coaxial with the axial direction of the cable just unwound, thus the whole large-scale turning and twisting of the cable during the unwinding and untwisting process and the cross confusion phenomenon caused by the bending of the cable can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of spiral cable, and particularly relates to an automatic untwisting device for preventing spiral cable from crossing and disordering. BACKGROUND

[0002] Spiral cable is widely used due to its strong extension ability and good contraction ability. Like a spring, the spiral cable can be stretched according to needs in use, and will automatically shrink after the tension is removed, effectively avoiding the problem of cable stacking and winding.

[0003] The production process of spiral cable is relatively complex. The main process for forming spiral cable includes winding, heat baking, cooling and untwisting. After winding, heat baking and cooling, the spiral cable basically maintains the spiral shape. This state of spiral cable is called "normal rotation cable". Since the cable is formed by winding force, there is a positive rotation internal stress between each coil. In order to overcome the problem of reverse relaxation between each coil of normal rotation cable, untwisting process is needed for further processing of normal rotation cable. Untwisting refers to pulling one end of the normal rotation cable and rotating it in the opposite direction of the normal rotation cable, and forming a reverse rotation cable. In this way, the internal stress can be released, so that the finished spiral cable will not cross and dislocate when stretched and retracted.

[0004] The untwisting process is usually operated manually, but there are also a small number of mechanical untwisting devices. Patent No. ZL2013103994974, entitled "Spiral cable untwisting machine", discloses a mechanical untwisting device. After trial, the untwisting machine can basically realize automatic untwisting of spiral cable, but there are many problems in use. Since the clamping head used for pulling and reversing one end of the spiral cable has a fixed angle with the center axis of the normal rotation cable, the center axis of the clamping head is not coaxial with the cable just unwound, causing the cable in the reverse rotation part to bend and the whole cable in the reverse rotation part to twist significantly. Further, the reverse twisted reverse rotation cable is wound on the already twisted reverse rotation cable, forming a disorder phenomenon. When the spiral cable crosses and dislocates, the cable in the rear will be dislocated and wound in the front. At this time, the spiral cable cannot automatically eliminate this problem, and the operator must stop the equipment and manually restore the arrangement order of each coil of the spiral cable before starting the machine again. This requires the operator to monitor the equipment at all times, which reduces the labor intensity of the operator, but does not reduce the production cost, and cannot ensure the improvement of production efficiency. SUMMARY

[0005] The technical problem solved by the present application is to provide an automatic untwisting device for preventing cross disorder of spiral cables, so as to overcome the technical problem that the traditional unwinding machine is prone to cross disorder when untwisting the spiral cable.

[0006] To solve the above technical problem, the technical scheme adopted by the present application is that the automatic untwisting device for preventing cross disorder of spiral cables comprises a rack, a winding-off machine head is arranged on the rack, a winding-off shaft is connected to the winding-off machine head, the winding-off machine head can drive the winding-off shaft to rotate, the winding-off shaft is used for winding a right-rotation cable, a positioning mechanism is connected to one end of the winding-off shaft close to the winding-off machine head, the positioning mechanism is used for positioning the end of the right-rotation cable wound on the winding-off shaft close to the winding-off machine head, a winding-off machine head is arranged on the rack on one side of the winding-off shaft, a chuck is connected to the winding-off machine head, the winding-off machine head can drive the chuck to rotate, the winding-off machine head is movably connected to the rack, a translation driving mechanism is arranged on the rack and used for driving the winding-off machine head to move back and forth, the movement direction of the winding-off machine head intersects with the axial direction of the winding-off shaft and the included angle is 60-120°, and the winding-off machine head comprises a base, a rotating disc which is rotatably connected to the base and parallel to the winding-off shaft, and a winding-off driver which is fixedly connected to the rotating disc and used for driving the chuck to rotate.

[0007] As a preferred scheme, the positioning mechanism comprises a limiting pin which is fixedly connected to the winding-off shaft in a perpendicular manner, a limiting tube which is sleeved on the straight section of the right-rotation cable close to the winding-off machine head, and a limiting sleeve which is fixedly connected to the outer wall of the limiting tube and detachably sleeved on the limiting pin.

[0008] As a preferred scheme, the winding-off machine head comprises a winding-off motor, a first shaft seat which is fixedly connected to the rack, and a winding-off transmission shaft which is rotatably connected to the first shaft seat, the winding-off motor is in transmission connection with the winding-off transmission shaft, and the winding-off transmission shaft is coaxially connected to the winding-off shaft.

[0009] As a preferred scheme, the translation driving mechanism comprises at least one track which is arranged along the movement direction of the winding-off machine head, a winding-off sliding block which is in sliding connection with the track, and a translation driver which is fixedly connected to the rack and used for driving the winding-off sliding block to slide back and forth along the track, and the base of the winding-off machine head is fixedly connected to the winding-off sliding block.

[0010] As a preferred scheme, the translation driver is a stepping motor which is fixedly connected to the rack, a lead screw which is parallel to the track is threadedly connected to the winding-off sliding block, both ends of the lead screw are rotatably connected to the rack, the stepping motor is in transmission connection with the lead screw, and the stepping motor drives the lead screw to rotate.

[0011] As a preferred scheme, the unwinding drive comprises a second shaft base fixedly connected to the rotating disc, a second shaft base is rotatably connected with an unwinding shaft, the unwinding shaft extends out of the second shaft base towards the unwinding shaft and is fixedly connected with the chuck, the rotating disc on one side of the second shaft base is fixedly connected with an unwinding motor, the unwinding motor is in transmission connection with the unwinding shaft to drive the unwinding shaft to rotate.

[0012] As a preferred scheme, the unwinding shaft is a hollow shaft, and the chuck is a three-jaw chuck, a through hole matched with the unwinding shaft is formed in the center of a disc base of the three-jaw chuck, and the disc base is fixedly sleeved at the end of the unwinding shaft.

[0013] As a preferred scheme, the frame is further fixedly provided with a sub-track parallel to the unwinding shaft, a separation sliding block is in sliding connection with the sub-track, and the separation sliding block is connected with a separation fork arranged perpendicularly to the unwinding shaft, the separation fork is located on the side of the unwinding shaft deviated from the unwinding motor, a U-shaped groove is formed in the top end of the separation fork, the U-shaped groove is located between the unwinding shaft and the chuck, one end of the U-shaped groove is opposite to the side surface of the unwinding shaft, and the spacing between the U-shaped groove and the positively rotating cable wound on the unwinding shaft can only accommodate a half circle of the reversely rotating cable.

[0014] As a preferred scheme, the top end of the separation fork is fixedly connected with two upward extending guide shafts, the two guide shafts are arranged along the axial direction of the unwinding shaft, and a guide sleeve is rotatably connected with any guide shaft, and the two guide sleeves and the top end of the separation fork jointly form the U-shaped groove.

[0015] As a preferred scheme, the two guide shafts are arranged in an "eight" shape, and the distance between the free ends of the two guide shafts is 1-1.5 times the outer diameter of the cable.

[0016] The present application has the advantages that: the rotating disc rotatably connected with the base supports the unwinding drive, the chuck can rotate along the plane parallel to the plane where the rotating disc is located, so that the chuck gradually rotates with the movement of the unwinding end of the positively rotating cable, the axial direction of the chuck is always coaxial with the axial direction of the cable just unwound, which can effectively avoid the whole large amplitude turning and the cross and disorder phenomenon caused by the bending of the cable during the unwinding process of the cable.

[0017] The present application further separates the reversely rotating cable that has been twisted from the half circle of reversely rotating cable that has just been twisted by the separation fork, and the physical isolation of the two can effectively avoid the reversely rotating cable that has just been twisted from crossing with the previous circle, thereby further eliminating the cross and disorder phenomenon during the unwinding process of the spiral cable. BRIEF DESCRIPTION OF DRAWINGS

[0018] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which:

[0019] Figure 1 is a structural schematic diagram of the present application;

[0020] Figure 2 is Figure 1 an A-A sectional view of the embodiment shown in

[0021] Figure 3 is Figure 1 a B-B sectional view of the embodiment shown in

[0022] Figure 4 is Figure 1 a C part enlarged view of the embodiment shown in

[0023] Figure 5 is a schematic diagram of a specific connection structure of the separating fork according to the present application;

[0024] Figure 6 is a schematic diagram of a specific structure of the head of the separating fork according to the present application;

[0025] Figures 1-6 in which: 1, frame, 2, unwinding head, 201, unwinding motor, 202, first shaft seat, 203, unwinding transmission shaft, 3, unwinding shaft, 4, positioning mechanism, 401, limiting nail, 402, limiting tube, 403, limiting sleeve, 5, untwisting head, 501, base, 502, rotating disc, 503, untwisting driver, 503a, second shaft seat, 503b, untwisting rotating shaft, 6, clamping head, 601, disc seat, 7, translation driving mechanism, 701, track, 702, untwisting sliding block, 703, translation driver, 704, lead screw, 8, through hole, 9, auxiliary track, 10, separating sliding block, 11, separating fork, 12, U-shaped groove, 13, guide shaft, 14, guide sleeve. DETAILED DESCRIPTION

[0026] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] For the sake of understanding, the spiral cable in the present embodiment refers to the whole cable, the right-hand rotating cable refers to the part of the cable to be untwisted around the unwinding shaft 3, and the left-hand rotating cable refers to the part of the cable formed after the untwisting head reverses the direction of rotation, which has opposite direction of rotation to the right-hand rotating cable.

[0028] As Figure 1 and Figure 2As shown in the figure, the automatic untwisting device for preventing the cross disorder of the spiral cable comprises a frame 1, a rewinding head 2 arranged on the frame 1, a rewinding shaft 3 connected to the rewinding head 2, the rewinding head 2 being capable of driving the rewinding shaft 3 to rotate, the rewinding shaft 3 being used for winding the right-hand cable, one positioning mechanism 4 connected to one end of the rewinding shaft 3 close to the rewinding head 2, the positioning mechanism 4 being used for positioning the end of the right-hand cable wound on the rewinding shaft 3 close to the rewinding head 2, one untwisting head 5 arranged on the frame 1 at one side of the rewinding shaft 3, a chuck 6 connected to the untwisting head 5, the untwisting head 5 being capable of driving the chuck to rotate, the untwisting head 5 being movably connected to the frame 1, the frame 1 being provided with a translation driving mechanism 7 for driving the untwisting head 5 to move back and forth, the moving direction of the untwisting head 5 intersecting the axial direction of the rewinding shaft 3 at an angle of 60-120°, preferably 90°. Figure 2 As shown in the figure, the untwisting head 5 in the embodiment comprises a base 501, a rotating disc 502 rotatably connected to the base 501 and parallel to the rewinding shaft 3, and an untwisting driver 503 fixedly connected to the rotating disc 502 and used for driving the chuck 6 to rotate.

[0029] In actual production, the rotating disc 502 can be free or limited. When the rotating disc 502 is not provided with a driving device for driving it to rotate, the rotating disc 502 is free to rotate, and the rotating disc 502 rotates when subjected to the tension in the direction of the cable inclination, so as to keep the central axis of the rewound spiral cable coaxial with the axial direction of the untwisting driver 503. When the outer edge of the rotating disc 502 is drivingly connected to a driving device, the rotating disc 502 is limited to rotate, and the rotating disc 502 is driven to rotate by the driving device, the driving device being capable of calculating the direction of the rewound spiral cable according to the simulated rewinding progress of the spiral cable and the distance of the rewinding head 5 moving backward, and driving the rotating disc 502 to rotate by a certain angle, so that the axial direction of the untwisting driver 503 is coaxial with the central axis of the rewound spiral cable.

[0030] As shown in the figure, the untwisting head 5 in the embodiment comprises a base 501, a rotating disc 502 rotatably connected to the base 501 and parallel to the rewinding shaft 3, and an untwisting driver 503 fixedly connected to the rotating disc 502 and used for driving the chuck 6 to rotate. Figure 4As shown, in the embodiment, the positioning mechanism 4 comprises a limiting pin 401 fixedly connected with the unwinding shaft 3 perpendicularly, a limiting tube 402 sleeved on the straight section of the right-hand cable close to the unwinding head 2, and a limiting sleeve 403 fixedly connected with the outer wall of the limiting tube 402 and detachably sleeved on the limiting pin 401. The limiting pin 401 is preferably detachably connected with the unwinding shaft 3 to adjust the position of the limiting pin 401 on the unwinding shaft 3. In application, the limiting tube 402 is sleeved on the straight section of the right-hand cable close to the unwinding head 2, the straight section of the right-hand cable close to the unwinding head 2 is rotated to be parallel to the limiting pin 401, the limiting tube 402 on the straight section of the right-hand cable is rotated to make the limiting sleeve 403 on the outer wall of the limiting tube 402 face the limiting pin 401, and the limiting tube 402 is slid along the cable until the limiting sleeve 403 is sleeved on the limiting pin 401.

[0031] The limiting tube 402 has a certain length and a relatively large friction force with the outer wall of the cable. When the unwinding head 2 drives the unwinding shaft 3 to rotate, the limiting tube 402 actually applies a radial force to the straight section of the right-hand cable, so the limiting tube 402 cannot easily fall off the cable, thereby achieving the positioning effect on one end of the right-hand cable.

[0032] As shown in the drawings, Figure 3 The unwinding head 2 in the embodiment comprises an unwinding motor 201, a first shaft seat 202 fixedly connected with the rack 1, and an unwinding transmission shaft 203 rotatably connected with the first shaft seat 202. The unwinding motor 201 is in transmission connection with the unwinding transmission shaft 203, and the transmission connection mode includes but is not limited to synchronous belt transmission, chain transmission, gear transmission, worm transmission, belt transmission, etc. The unwinding transmission shaft 203 is coaxially connected with the unwinding shaft 3.

[0033] In actual production, the unwinding transmission shaft 203 and the unwinding shaft 3 can be quickly and detachably connected in the form of clamping. The opposite ends of the unwinding transmission shaft 203 and the unwinding shaft 3 can be coaxially provided with polygonal holes and polygonal columns, respectively, to realize the quick connection of the two.

[0034] As shown in the drawings, Figure 1 and Figure 2 The translation drive mechanism 7 in the embodiment comprises two tracks 701 arranged along the movement direction of the unwinding head 5, an unwinding slider 702 in sliding connection with the tracks 701, and a translation driver 703 fixedly connected with the rack 1 to drive the unwinding slider 702 to slide back and forth along the tracks 701. The translation driver 703 can be a piston cylinder, a linear motor, a stepping motor, etc. The base 501 of the unwinding head 5 is fixedly connected with or integrally formed with the unwinding slider 702.

[0035] As shown in the drawings, Figure 2As shown in the drawings, the translation driver 703 in the embodiment is preferably a stepper motor fixedly connected to the frame 1, the withdrawal torsion sliding block 702 is threadedly connected with a lead screw 704 arranged in parallel with the track 701, the two ends of the lead screw 704 are rotatably connected to the frame 1, the stepper motor is in transmission connection with the lead screw 704 to drive the rotation of the lead screw 704, and the rotation of the lead screw 704 drives the withdrawal torsion sliding block 702 to move back and forth along the track 701.

[0036] As shown in the drawings, Figure 1 The withdrawal torsion driver 503 in the embodiment includes a second shaft seat 503a fixedly connected to the rotating disc 502, a withdrawal torsion rotating shaft 503b rotatably connected to the second shaft seat 503a, the withdrawal torsion rotating shaft 503b extending out of the second shaft seat 503a towards one end of the withdrawal shaft 3 and fixedly connected with the chuck 6, and a withdrawal torsion motor 503c fixedly connected to the rotating disc 502 on one side of the second shaft seat 503a, the withdrawal torsion motor 503c being in transmission connection with the withdrawal torsion rotating shaft 503b to drive the rotation of the withdrawal torsion rotating shaft 503b.

[0037] In actual production, the withdrawal torsion driver 503 can also directly use a low-rotation-speed stepper motor or a servo motor.

[0038] As shown in the drawings, Figure 2 In the embodiment, the withdrawal torsion rotating shaft 503b is a hollow shaft, the chuck 6 is a three-jaw chuck, a through hole 8 matched with the withdrawal torsion rotating shaft 503b is formed in the center of a disc seat 601 of the three-jaw chuck, and the disc seat 601 is fixedly sleeved on the end of the withdrawal torsion rotating shaft 503b.

[0039] The head part of some spiral cables has a relatively long straight section, therefore, the hollow withdrawal torsion rotating shaft 503b can be inserted into the relatively long straight section of the head part of the spiral cable, so that the chuck 6 can clamp the spiral part of the cable to shorten the length of the cable between the chuck 6 and the withdrawal shaft 3, reduce the overall torsion amplitude of the cable after untwisting, and avoid the cross and disorder.

[0040] In combination with Figure 1 and Figure 5 In the embodiment, the frame 1 is further fixedly provided with a sub-track 9 parallel to the withdrawal shaft 3, a separation sliding block 10 is in sliding connection with the sub-track 9, a separation fork 11 is connected to the separation sliding block 10 and arranged perpendicularly to the withdrawal shaft 3, the separation fork 11 is located on the side of the withdrawal shaft 3 deviated from the withdrawal torsion chuck 5, a U-shaped groove 12 is formed in the top end of the separation fork 11, the U-shaped groove 12 is between the withdrawal shaft 3 and the chuck 6, one end of the U-shaped groove 12 is opposite to the side surface of the withdrawal shaft 3, the width of the U-shaped groove 12 is smaller than the outer diameter of the spiral wire of the spiral cable and larger than the outer diameter of the cable body, and the spacing between the U-shaped groove 12 and the positively twisted cable wound on the withdrawal shaft 3 can only accommodate half a turn of the untwisted cable.

[0041] The top of the split fork 11 separates the first turn of the reverse cable that has just been unwound from the other turns of the reverse cable, thereby effectively avoiding the technical problem of the first turn of the reverse cable winding forward in front of the previous turn of the cable.

[0042] In this embodiment, two upward-extending guide shafts 13 are fixedly connected to the top of the separating fork 11. The two guide shafts 13 are arranged along the axial direction of the unwinding shaft 3. A guide sleeve 14 is rotatably connected to either guide shaft 13. The two guide sleeves 14 and the top of the separating fork 11 together form a U-shaped groove 12. The guide sleeve 14 is rotatable, which effectively reduces the friction between the spiral cable and the separating fork 11 when the spiral cable passes through the U-shaped groove 12, and reduces damage to the cable surface.

[0043] like Figure 6 As shown, in this embodiment, the two guide shafts 13 are further configured in a figure-eight shape, and the distance between the free ends of the two guide shafts 13 is 1 to 1.5 times the outer diameter of the cable.

[0044] The two guide shafts 13 arranged in a figure-eight shape and the guide sleeves 14 thereon can effectively prevent the cable from coming off the top of the U-shaped groove 12 during the untwisting process.

[0045] The working process of this invention is as follows: Figures 1-6 As shown, firstly, the unwinding shaft 3, with the positive spiral cable wound on it, is connected to the unwinding head 2. Then, the untwisting head 5 is individually controlled to approach the unwinding head 2. The end of the positive spiral cable away from the unwinding head 2 is passed through the U-shaped groove 12 at the top of the separating fork 11 and inserted into the clamp 6. After clamping the clamp 6, the unwinding head 2, the untwisting head 5, and the translation drive mechanism 7 are started simultaneously. The three work together at a preset speed. When the unwinding head 2 rotates, it actively unwinds the positive spiral cable to eliminate the plastic deformation caused by passive pulling during unwinding, which would straighten the cable and cause it to lose its elasticity. It also avoids damage to the outer sheath caused by the cable scraping against the unwinding shaft 3 during passive unwinding. The untwisting head 5 drives the unwound cable to rotate in the opposite direction, causing the cable to form a reverse spiral. During the unwinding process, the reverse-rotating cable gradually grows longer. The translation drive mechanism 7 drives the unwinding head 5 to gradually move away from the unwinding head 2, maintaining the tension of the reverse-rotating cable essentially constant and preventing the occurrence of large rope swings and cross-winding. During unwinding, when the axis of the clamp 6 deviates from the axis of the cable just unwound on the unwinding shaft 3, the reverse-rotating cable bends, thus generating a radial force on the clamp 6. This radial force drives the clamp 6, the unwinding drive 503, and the turntable 502 to rotate relative to the base 501 until the axis of the clamp 6 is coaxial with the cable just unwound on the unwinding shaft 3. This further eliminates the phenomena of large rope swings and cross-winding during cable unwinding.

[0046] The total rotation circle number of the unwinding motor 2 and the unwinding and twisting motor 5 is preset according to the spiral number of the spiral cable, and when the right-hand spiral cable is completely unwound and twisted in the opposite direction, the unwinding motor 2, the unwinding and twisting motor 5 and the translation driving mechanism 7 automatically stop.

[0047] During the unwinding process of the cable, the separating fork 11 separates the just unwound one or half circle of the twisted cable, and can effectively avoid the cross and disorder problem in the unwinding and twisting process of the cable. During the unwinding process of the spiral cable, the unwound cable gradually moves along the axial direction of the unwinding shaft 3 to the unwinding head 2, and the separating fork 11 also gradually moves along the sub-track 9 following the unwound cable, so that the just formed twisted cable always passes through the separating fork 11 for separation before being combined with the front twisted cable.

[0048] The above embodiments only exemplarily illustrate the principles and effects of the present application and part of the applied embodiments, and are not used to limit the present application; it should be noted that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. Automatic untwisting device to prevent cross-entanglement of helical cables, comprising a frame (1), characterized in that, The rack (1) is provided with a unwinding head (2), the unwinding head (2) is connected with a unwinding shaft (3), the unwinding head (2) can drive the unwinding shaft (3) to rotate, the unwinding shaft (3) is used for winding the right-hand cable, the end of the unwinding shaft (3) close to the unwinding head (2) is connected with a positioning mechanism (4), the positioning mechanism (4) is used for positioning the end of the right-hand cable close to the unwinding head (2) wound on the unwinding shaft (3), the rack (1) is provided with a unwinding and twisting head (5) on the side of the unwinding shaft (3), the unwinding and twisting head (5) is connected with a chuck (6), the unwinding and twisting head (5) can drive the chuck to rotate, the unwinding and twisting head (5) is movably connected on the rack (1), the rack (1) is provided with a translation drive mechanism (7) for driving the unwinding and twisting head (5) to move back and forth, the movement direction of the unwinding and twisting head (5) intersects with the axial direction of the unwinding shaft (3) and the included angle is 60~120°, the unwinding and twisting head (5) comprises a base (501), a rotating disc (502) rotatably connected on the base (501) and parallel to the unwinding shaft (3), a unwinding and twisting drive (503) fixedly connected on the rotating disc (502) and used for driving the chuck (6) to rotate. The unwinding and twisting drive (503) comprises a second shaft seat (503a) fixedly connected on the rotating disc (502), a unwinding and twisting shaft (503b) rotatably connected on the second shaft seat (503a), the end of the unwinding and twisting shaft (503b) close to the unwinding shaft (3) extends out of the second shaft seat (503a) and is fixedly connected with the chuck (6), the rotating disc (502) on the side of the second shaft seat (503a) is fixedly connected with a unwinding and twisting motor (503c), the unwinding and twisting motor (503c) is in transmission connection with the unwinding and twisting shaft (503b) and drives the unwinding and twisting shaft (503b) to rotate.

2. The automatic twistback device of claim 1, wherein The positioning mechanism (4) comprises a limiting pin (401) fixedly connected with the unwinding shaft (3) perpendicularly, a limiting tube (402) sleeved on the straight section of the right-hand cable close to the unwinding head (2), a limiting sleeve (403) fixedly connected on the outer wall of the limiting tube (402) and detachably sleeved on the limiting pin (401).

3. The automatic twistback device of claim 1, wherein The unwinding head (2) comprises a unwinding motor (201), a set of first shaft seats (202) fixedly connected on the rack (1), a unwinding transmission shaft (203) rotatably connected on the first shaft seat (202), the unwinding motor (201) is in transmission connection with the unwinding transmission shaft (203), and the unwinding transmission shaft (203) is coaxially connected with the unwinding shaft (3).

4. The automatic twistback device of claim 1, wherein The translation drive mechanism (7) comprises at least one track (701) arranged along the movement direction of the unwinding and twisting head (5), a unwinding and twisting sliding block (702) in sliding connection with the track (701), a set of translation drives (703) fixedly connected on the rack (1) and used for driving the unwinding and twisting sliding block (702) to slide back and forth along the track (701), and the base (501) of the unwinding and twisting head (5) is fixedly connected with the unwinding and twisting sliding block (702).

5. The automatic twistback device of claim 4, wherein The translation driver (703) is a step motor fixedly connected to the rack (1), the retreat twist slider (702) is threadedly connected with a lead screw (704) arranged in parallel to the track (701), two ends of the lead screw (704) are rotationally connected to the rack (1), the step motor is in transmission connection with the lead screw (704) to drive the rotation of the lead screw.

6. The automatic twistback device of claim 1, wherein The retreat twist shaft (503b) is a hollow shaft, the chuck (6) is a three-jaw chuck, a through hole (8) matched with the retreat twist shaft (503b) is formed in the center of a disc seat (601) of the three-jaw chuck, and the disc seat (601) is fixedly sleeved at the end of the retreat twist shaft (503b).

7. The automatic twist-off device according to any one of claims 1 to 6, characterized in that The rack (1) is further fixedly provided with a sub-track (9) parallel to the retreat shaft (3), the sub-track (9) is slidably connected with a separation slider (10), the separation slider (10) is connected with a separation fork (11) arranged perpendicularly to the retreat shaft (3), the separation fork (11) is located on the side of the retreat shaft (3) deviated from the retreat twist chuck (5), a U-shaped groove (12) is formed in the top end of the separation fork (11), the U-shaped groove (12) is between the retreat shaft (3) and the chuck (6), one end of the U-shaped groove (12) is opposite to the side surface of the retreat shaft (3), and the spacing between the U-shaped groove (12) and the positively rotating cable wound on the retreat shaft (3) can only accommodate a half of the counter-rotating cable.

8. The automatic twistback device of claim 7, wherein The top end of the separation fork (11) is fixedly connected with two upward extending guide shafts (13), the two guide shafts (13) are arranged along the axial direction of the retreat shaft (3), a guide sleeve (14) is rotationally connected to any guide shaft (13), and the two guide sleeves (14) and the top end of the separation fork (11) jointly form the U-shaped groove (12).

9. The automatic twistback device of claim 8, wherein The two guide shafts (13) are arranged in an "eight" shape, and the distance between the free ends of the two guide shafts (13) is 1-1.5 times of the outer diameter of the cable.

Images