CN216105342U - Non-mechanical contact type excitation magnetic field constant tension output device and back-twist pay-off rack - Google Patents

Abstract

The utility model discloses a non-mechanical contact type excitation magnetic field constant tension output device and a back-twist pay-off rack, which comprise a first rotating shaft, a second rotating shaft, a wire coil, a first servo motor, a second servo motor, a bearing seat, a hysteresis stator, a hysteresis rotor, a tension rod and a rotating rack, wherein the first rotating shaft is connected with the second rotating shaft through the wire coil; the second rotating shaft is rotatably sleeved outside the first rotating shaft; the first servo motor drives the first rotating shaft to rotate, and the second servo motor drives the second rotating shaft to rotate; the bearing seat is sleeved outside the second rotating shaft; the magnetic hysteresis stator is arranged on the bearing seat, and the magnetic hysteresis rotor is rotatably sleeved outside the second rotating shaft; the tension rod is connected with the output end of the hysteresis rotor; the rotating frame is fixed at the front end of the second rotating shaft; the wire coil is fixed at the front end of the first rotating shaft. The utility model can generate stable and accurate paying-off tension, ensure paying-off stability and has more simplified and compact structure.

Description

Non-mechanical contact type excitation magnetic field constant tension output device and back-twist pay-off rack

Technical Field

The utility model relates to a constant tension output device, in particular to a non-mechanical contact type excitation magnetic field constant tension output device and a back-twist pay-off rack.

Background

In the production process of the cable, the core wires wound on the wire coil need to be paid off, and the paying off structure is divided into a fixed ground paying off structure, a rotary frame rotation untwisting paying off structure and other forms, and in order to make the wires output more stably, a constant tension is generally required to be applied to the wires. Use the wire to take the example when back-twist unwrapping wire operation, traditional back-twist pay off rack adopts magnetic powder clutch or other tension element as tension element, however, magnetic powder clutch has the power inaccuracy that produces, the shortcoming of magnetic needs to be added at the interval time, and magnetic powder clutch can produce a large amount of heats because of the friction, and high temperature will influence magnetic powder clutch's accuracy in reverse, in addition, still need use the hold-in range to drive the pivot after magnetic powder clutch's the output, make tensile control stable and accurate inadequately like this, be unfavorable for the control of unwrapping wire.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a non-mechanical contact type excitation magnetic field constant tension output device which can generate stable and accurate pay-off tension, ensures pay-off stability and has a more simplified and compact structure.

Another object of the present invention is to provide a back twist pay-off stand which is stable and accurate in pay-off, and has a simplified and compact structure.

In order to achieve the above object, the present invention provides a non-mechanical contact type excitation magnetic field constant tension output device, which comprises a first rotating shaft, a second rotating shaft, a wire coil, a first servo motor, a second servo motor, a bearing seat, a hysteresis stator, a hysteresis rotor, a tension rod and a rotating frame; the second rotating shaft is rotatably sleeved outside the first rotating shaft; the first servo motor drives the first rotating shaft to rotate, and the second servo motor drives the second rotating shaft to rotate; the bearing seat is sleeved outside the second rotating shaft; the hysteresis stator is arranged on the bearing seat and sleeved outside the second rotating shaft, and the hysteresis rotor is matched with the hysteresis stator and rotatably sleeved outside the second rotating shaft; the first rotating shaft, the second rotating shaft, the wire coil, the bearing seat, the hysteresis stator and the hysteresis rotor are coaxially arranged; the tension rod is connected with the output end of the hysteresis rotor; the rotating frame is fixed at the front end of the second rotating shaft; the wire coil is fixed at the front end of the first rotating shaft, so that core wires led out from the wire coil can sequentially pass around the rotating frame and the tension rod.

Compared with the prior art, the hysteresis brake is formed by matching the hysteresis rotor and the hysteresis stator by arranging the hysteresis stator and the hysteresis rotor outside the second rotating shaft. When the coil of the hysteresis stator is electrified, the hysteresis rotor is not contacted with the hysteresis stator in the rotating process, so that torque can be output in a non-contact mode, constant tension is generated on the core wire, and stable tension output is realized. Moreover, friction cannot occur between the hysteresis rotor and the hysteresis stator, so that a large amount of heat is avoided, and the accuracy of the torque output by the hysteresis rotor is ensured; in addition, different output torques can be obtained by inputting different currents into the hysteresis stator, so that the purpose of tension adjustment is achieved, and the use is more convenient. In addition, hysteresis lag rotor and hysteresis lag stator all cup joint in the second is changeed epaxially, compare the form that the tradition used magnetic powder clutch, need not frequently to add the magnetic, need not to use synchronous belt drive pivot such as belt and belt pulley, and it is more convenient to use, and the structure is simpler, and the overall arrangement is more reasonable, compact.

Preferably, the non-mechanical contact type excitation magnetic field constant tension output device further comprises a displacement sensor and a displacement sensing block, the displacement sensor is arranged on the rotating frame, and the displacement sensing block is arranged at the output end of the hysteresis rotor and can mutually sense with the displacement sensor. The displacement sensor and the displacement sensing block are used for detecting the displacement change between the rotating frame and the tension rod, so that the change of the paying-off speed can be indirectly detected, when positive displacement is generated between the rotating frame and the tension rod, namely the distance between the rotating frame and the tension rod is reduced, the paying-off speed of the wire coil is over slow, otherwise, the paying-off speed of the wire coil is over fast. Therefore, through the arrangement of the displacement sensor and the displacement sensing block, the displacement sensor can send a signal to a control system and control the paying-off speed of the first servo motor, so that the core wire can be sent out at a constant speed and the constant paying-off tension is kept.

Specifically, the non-mechanical contact type excitation magnetic field constant tension output device further comprises a conducting ring and a conducting terminal, the conducting ring is fixedly sleeved on the second rotating shaft, the conducting terminal is in sliding electrical contact with the conducting ring, and the conducting ring is electrically connected with the displacement sensor. Because the displacement inductor follows the revolving rack rotates and can not be directly connected through a wire, the revolving rack can rotate by utilizing the sliding contact of the conducting ring and the conducting terminal, and meanwhile, the purpose of electric connection can be achieved, the problem of electric connection is effectively solved, the structure is simpler, and the use is more convenient.

Preferably, a first transmission mechanism is arranged between the first servo motor and the first rotating shaft.

Specifically, first drive mechanism includes first drive pulley, first driven pulley and first belt, first drive pulley set up in first servo motor's output, first driven pulley set up in first pivot, first belt is around locating on first drive pulley and the first driven pulley.

Preferably, a second transmission mechanism is arranged between the second servo motor and the second rotating shaft.

Specifically, second drive mechanism includes second drive pulley, second driven pulley and second belt, second drive pulley set up in second servo motor's output, second driven pulley set up in the second pivot, the second belt is around locating on second drive pulley and the second driven pulley.

Preferably, the rotating frame is provided with a wire outgoing guide wheel, the wire outgoing guide wheel is located on the periphery of the wire coil, and the tension rod is located on the periphery of the wire outgoing guide wheel. Therefore, the surrounding space of the wire coil can be effectively utilized, the structural compactness of the whole device is improved, and the volume of the whole device is smaller.

Preferably, a steering guide wheel is arranged on the rotating frame, and the core wire can be led out from the tension rod and then bypasses the steering guide wheel. The core wire can change the leading-out direction by utilizing the steering guide wheel, and then the core wire is discharged from the center guide wheel of the rotating frame.

The utility model provides a back-twist pay-off rack, includes guide pulley support and the permanent tension output device in non-mechanical contact type excitation magnetic field, the guide pulley support is fixed in on the swivel mount and be located the front end of swivel mount, the pin joint has first line guide pulley and second to cross the line guide pulley on the guide pulley support, first line guide pulley set up in the guide pulley support, the second cross the line guide pulley set up in the middle part of guide pulley support, the heart yearn can be walked around first line guide pulley and the second is crossed and is followed behind the line guide pulley's the central axis direction is drawn forth.

Drawings

FIG. 1 is a perspective view of the untwisting pay-off stand of the present invention.

Fig. 2 is an axial sectional view of the non-mechanical contact type excitation magnetic field constant tension output device of the present invention.

FIG. 3 is an axial cross-sectional view of the untwisting pay-off stand of the present invention.

FIG. 4 is a left side view of the untwisting pay-off stand of the present invention.

FIG. 5 is a block diagram of a idler frame of the de-twist pay-off stand of the present invention.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.

As shown in fig. 1 to 3, the untwisting pay-off stand 100 of the present invention is adapted to pay off and untwist a core wire 200, and includes a non-mechanical contact type excitation magnetic field constant tension output device 1 and a guide wheel bracket 2. The non-mechanical contact type excitation magnetic field constant tension output device 1 is arranged on a frame 3 and comprises a first rotating shaft 11, a second rotating shaft 12, a wire coil 13, a first servo motor 14, a second servo motor 15, a bearing seat 16, a hysteresis stator 17, a hysteresis rotor 18, a tension rod 19 and a rotating frame 110. The coil 13 of the present application is a coil for winding the core wire 200. The second rotating shaft 12 is a hollow shaft with two through ends, and the second rotating shaft 12 is rotatably sleeved outside the first rotating shaft 11 through bearings arranged at the front end and the rear end of the inner hole. The front end and the rear end of the first rotating shaft 11 extend out of the second rotating shaft 12. The wire coil 13 is fixed to the front end of the first rotating shaft 11. The first servo motor 14 is arranged on the frame 3 and drives the first rotating shaft 11 to rotate, and the second servo motor 15 is arranged on the frame 3 and drives the second rotating shaft 12 to rotate; the bearing seat 16 is sleeved outside the second rotating shaft 12; the second pivot 12 with be equipped with the bearing between the preceding, the back both ends of bearing frame 16, hysteresis stator 17 set up in the front end of bearing frame 16 just locates through the bearing housing outside the second pivot 12. Have the rotation gap in the hysteresis stator 17, hysteresis rotor 18 rotationally locates through the bearing the second pivot 12 is outer and be located the front end of second pivot 12, hysteresis rotor 18 with hysteresis stator 17 cooperation and can the rotation gap internal rotation. The first rotating shaft 11, the second rotating shaft 12, the wire coil 13, the bearing seat 16, the hysteresis stator 17 and the hysteresis rotor 18 are coaxially arranged. The output of hysteresis rotor 18 has carousel 181, tension bar 19 with carousel 181 is connected, the center pin of tension bar 19 skew the center pin of first pivot 11 and with the center pin of first pivot 11 is parallel, just the last rotatable barrel that has of tension bar 19 is so that heart yearn 200 is around establishing and carrying. The hysteresis stator 17 and the hysteresis rotor 18 constitute a hysteresis brake which can output torque after being energized such that the tension rod 19 applies a constant unwinding tension to the core wire 200. The rotating frame 110 is fixed at the front end of the second rotating shaft 12 and located at the front end of the rotating disc 181, the rotating frame 110 has a front plate and a rear plate, an outgoing line guide wheel 111 is arranged between the front plate and the rear plate, the outgoing line guide wheel 111 deviates from the central axis of the first rotating shaft 11 and is located at the periphery of the wire coil 13, and the central axis of the outgoing line guide wheel 111 is parallel to the central axis of the first rotating shaft 11. The tension rod 19 is positioned at the periphery of the outgoing line guide wheel 111; therefore, the surrounding space of the wire coil 13 can be effectively utilized, the structural compactness of the whole device is improved, and the volume of the whole device is smaller. The rotating frame 110 is further provided with a steering guide wheel 112, and a central axis of the steering guide wheel 112 is perpendicular to a central axis of the rotating frame 110. The leading-out direction of the core wire 200 can be changed by using the steering guide wheel 112, so that the output of the core wire 200 is more accurate. The rotating frame 110 is further provided with two stoppers (not shown), and the tension rod 19 is located between the two stoppers, and the stoppers can prevent the tension rod 19 from excessively swinging. When the tension rod 19 is located at the middle position of the two stoppers, the maximum angle of the central angle between the tension rod 19 and any stopper is 60 degrees, preferably 45 degrees.

Referring to fig. 4 and 5, the idler bracket 2 is fixed to the front end of the front plate of the rotating frame 110. A first wire-passing guide wheel 21 and a second wire-passing guide wheel 22 are pivoted on the guide wheel bracket 2, the first wire-passing guide wheel 21 is arranged at the periphery of the guide wheel bracket 2, the second wire-passing guide wheel 22 is arranged in the middle of the guide wheel bracket 2, and a core wire 200 led out from the wire coil 13 sequentially bypasses the wire-outgoing guide wheel 111, the tension rod 19, the steering guide wheel 112, the first wire-passing guide wheel 21 and the second wire-passing guide wheel 22 and then is led out forwards or backwards along the central axis direction of the guide wheel bracket 2.

Referring to fig. 2 and 3, the non-mechanical contact type excitation magnetic field constant tension output device 1 further includes a displacement sensor 113 and a displacement sensing block 114, the displacement sensor 113 is disposed on the rotating frame 110 and behind the rear plate of the rotating frame 110, and the displacement sensing block 114 is disposed in front of the rotating disc 181 at the output end of the hysteresis rotor 18 and can be opposite to the displacement sensor 113, and the two can sense each other. The displacement sensor 113 and the displacement sensing block 114 are used to detect the displacement change between the rotating frame 110 and the tension rod 19, so as to indirectly detect the change of the yarn releasing speed. When the rotating frame 110 and the tension rod 19 rotate relatively, the displacement sensing block 114 generates positive displacement relative to the displacement sensor 113, that is, the distance between the two is smaller, which indicates that the wire releasing speed of the wire coil 13 is too slow, and vice versa, indicates that the wire releasing speed of the core wire 200 is too fast. Therefore, by designing the displacement sensor 113 and the displacement sensing block 114, the displacement sensor 113 can send a signal to a control system and control the output speed of the first servo motor 14, so that the wire releasing speed can be controlled, and the core wire 200 can be fed at a constant tension and a constant speed. In addition, the tension of the core wire 200 by the tension rod 19 is determined by the input current of the hysteresis stator 17, so that the tension of the tension rod 19 can be controlled by controlling the input current of the hysteresis stator 17 to ensure that the core wire 200 is output with constant tension.

As shown in fig. 2 and fig. 3, the non-mechanical contact type excitation magnetic field constant tension output device 1 further includes a conductive ring 115 and a conductive terminal 116, wherein the conductive ring 115 is fixed to the outer side of the rear end of the second rotating shaft 12 in a sleeved manner and is insulated from the second rotating shaft 12. The conductive terminal 116 is connected to the bearing seat 16 or the frame 3, the conductive terminal 116 is in sliding electrical contact with the conductive ring 115, and the conductive terminal 116 is electrically connected to a power supply or a control system; the conductive ring 115 extends along the second shaft 12 through a conductive wire and is electrically connected to the displacement sensor 113 to electrically connect the displacement sensor 113. Because the displacement sensor 113 rotates along with the rotating frame 110 and cannot be directly connected with the rotating frame from the outside through a conducting wire, the conducting ring 115 is in sliding contact with the conducting terminal 116, so that the rotating of the conducting ring along with the rotating frame 110 can be realized, meanwhile, the purpose of power-on connection can be achieved, the problem of electric connection is effectively solved, the structure is simpler, and the use is more convenient.

As shown in fig. 2 and 3, a first transmission mechanism 117 is provided between the first servo motor 14 and the first rotary shaft 11. Specifically, the first transmission mechanism 117 includes a first driving pulley 117a, a first driven pulley 117b and a first belt 117c, the first driving pulley 117a is disposed at the output end of the first servo motor 14, the first driven pulley 117b is disposed at the rear end of the first rotating shaft 11, and the first belt 117c is wound on the first driving pulley 117a and the first driven pulley 117 b.

As shown in fig. 2 and 3, a second transmission mechanism 118 is disposed between the second servo motor 15 and the second rotating shaft 12. Specifically, the second transmission mechanism 118 includes a second driving pulley 118a, a second driven pulley 118b and a second belt 118c, the second driving pulley 118a is disposed at the output end of the second servo motor 15, the second driven pulley 118b is disposed at the rear end of the second rotating shaft 12, and the second belt 118c is wound around the second driving pulley 118a and the second driven pulley 118 b.

In combination with the above description and with reference to fig. 3 and 4, the working principle of the untwisting pay-off stand 100 of the present invention is described in detail as follows:

first, the wire coil 13 fully wound with the core wire 200 is mounted at the front end of the first rotating shaft 11, the core wire 200 is drawn out and sequentially wound to pass through the wire-out guide wheel 111, the tension rod 19, the steering guide wheel 112, the first wire-passing guide wheel 21 and the second wire-passing guide wheel 22, and finally the core wire 200 can be led to a wire twisting machine, which is not the focus of the present application, and therefore, the structure thereof is not described. When paying off, control system control first servo motor 14 starts, first servo motor 14 drives first drive pulley 117a, first drive pulley 117a drives first driven pulley 117b through first belt 117 c. The first driven pulley 117b rotates the first rotating shaft 11, and the first rotating shaft 11 rotates the wire coil 13 to release the core wire 200. At the same time, the control system applies a corresponding constant current of a desired tension to the coils of the hysteresis stator 17, and at this time, the hysteresis rotor 18 generates a torque to drive the tension rod 19, thereby generating a constant tension to the core wires 200 on the tension rod 19. And the control system controls the second servo motor 15 and the first servo motor 14 to start simultaneously, the second servo motor 15 drives the second driving pulley 118a, and the second driving pulley 118a drives the second driven pulley 118b through the second belt 118 c. The second driven pulley 118b drives the second rotating shaft 12 to rotate, the second rotating shaft 12 drives the rotating frame 110 to rotate, the outgoing guide wheel 111 of the rotating frame 110 circumferentially rotates around the central shaft of the rotating frame 110, and the tension rod 19 is pulled under the winding effect of the core wire 200. At this time, the core wire 200 is output with a constant tension and is output in the direction of the stranding machine along the central axis of the rotating frame 110 through the steering guide wheel 112, the first wire guide wheel 21, and the second wire guide wheel 22. In addition, since the rotating frame 110 continuously rotates while the core wire 200 is output, the core wire 200 before passing through the second wire guide wheel 22 rotates circumferentially around the central axis of the rotating frame 110, so that the core wire 200 can be untwisted.

When the output speed of the core wire 200 becomes slow, the tension lever 19 swings. At this time, the displacement sensing block 114 moves relative to the displacement sensor 113 to generate a positive displacement (the distance between the two becomes smaller), the displacement sensor 113 can detect and send a signal to the control system, and the control system controls the output rotating speed of the first servo motor 14 through the signal to accelerate the output rotating speed, so as to achieve the purpose of accelerating the paying-off speed of the wire coil 13, thereby keeping the constant and accurate paying-off tension and outputting the core wire 200 at a constant speed. On the contrary, when the output speed of the core wire 200 becomes fast, the tension rod 19 swings reversely. At this time, the displacement sensing block 114 moves relative to the displacement sensor 113 to generate a negative displacement (the distance between the two increases), the displacement sensor 113 can detect and send a signal to the control system, and the control system controls the output rotation speed of the first servo motor 14 through the signal to slow down the output rotation speed, so as to achieve the purpose of slowing down the wire releasing speed of the wire coil 13, thereby keeping the wire releasing tension constant and outputting the core wire 200 at a constant speed.

Compared with the prior art, the hysteresis rotor 17 and the hysteresis rotor 18 are arranged outside the second rotating shaft 12, so that the hysteresis rotor 18 and the hysteresis stator 17 are matched to form a hysteresis brake, when a coil of the hysteresis stator 17 is electrified, because the hysteresis rotor 18 is not in contact with the hysteresis stator 17 in the rotating process, the torque is output in a non-contact way, and therefore, a constant tension can be generated on the core wire 200, and the stable output of the tension is realized; furthermore, no friction occurs between the hysteresis rotor 18 and the hysteresis stator 17, so as to avoid generating a large amount of heat, thereby ensuring the accuracy of the torque output by the hysteresis rotor; in addition, different tension can be obtained by inputting different current to the hysteresis stator 17, and the tension device is suitable for paying off different core wires and is more convenient to use. In addition, hysteresis rotor 18 and hysteresis stator 17 all cup joint on second pivot 12, compare the form that the tradition used the magnetic powder clutch, need not frequently to add the magnetic, need not to use synchronous belt drive pivot such as belt and belt pulley, and it is more convenient to use, and the structure is simpler, and the overall arrangement is more reasonable, compact. Moreover, because the rotation between the hysteresis rotor 18 and the hysteresis stator 17 is a non-mechanical contact structure, the constant tension output device can theoretically realize output close to zero tension, and has wider tension adjusting range and wider application compared with the traditional tension output device.

The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the present invention, which is therefore intended to cover all equivalent changes and modifications within the scope of the present invention.

Claims (10)

1. A non-mechanical contact type excitation magnetic field constant tension output device is characterized in that: the magnetic hysteresis motor comprises a first rotating shaft, a second rotating shaft, a wire coil, a first servo motor, a second servo motor, a bearing seat, a hysteresis stator, a hysteresis rotor, a tension rod and a rotating frame; the second rotating shaft is rotatably sleeved outside the first rotating shaft; the first servo motor drives the first rotating shaft to rotate, and the second servo motor drives the second rotating shaft to rotate; the bearing seat is sleeved outside the second rotating shaft; the hysteresis stator is arranged on the bearing seat and sleeved outside the second rotating shaft, and the hysteresis rotor is matched with the hysteresis stator and rotatably sleeved outside the second rotating shaft; the first rotating shaft, the second rotating shaft, the wire coil, the bearing seat, the hysteresis stator and the hysteresis rotor are coaxially arranged; the tension rod is connected with the output end of the hysteresis rotor; the rotating frame is fixed at the front end of the second rotating shaft; the wire coil is fixed at the front end of the first rotating shaft, so that core wires led out from the wire coil can sequentially pass around the rotating frame and the tension rod.

2. The non-mechanical contact type excitation magnetic field constant tension output device according to claim 1, characterized in that: the non-mechanical contact type excitation magnetic field constant tension output device further comprises a displacement inductor and a displacement induction block, wherein the displacement inductor is arranged on the rotating frame, and the displacement induction block is arranged at the output end of the hysteresis rotor and can be mutually induced by the displacement inductor.

3. The non-mechanical contact type excitation magnetic field constant tension output device according to claim 2, characterized in that: the non-mechanical contact type excitation magnetic field constant tension output device further comprises a conducting ring and a conducting terminal, the conducting ring is fixedly sleeved on the second rotating shaft, the conducting terminal is in sliding electrical contact with the conducting ring, and the conducting ring is electrically connected with the displacement sensor.

4. The non-mechanical contact type excitation magnetic field constant tension output device according to claim 1, characterized in that: a first transmission mechanism is arranged between the first servo motor and the first rotating shaft.

5. The non-mechanical contact type excitation magnetic field constant tension output device according to claim 4, characterized in that: first drive mechanism includes first drive pulley, first driven pulley and first belt, first drive pulley set up in first servo motor's output, first driven pulley set up in first pivot, first belt is around locating on first drive pulley and the first driven pulley.

6. The non-mechanical contact type excitation magnetic field constant tension output device according to claim 1, characterized in that: and a second transmission mechanism is arranged between the second servo motor and the second rotating shaft.

7. The non-mechanical contact type excitation magnetic field constant tension output device according to claim 6, characterized in that: the second transmission mechanism comprises a second driving belt pulley, a second driven belt pulley and a second belt, the second driving belt pulley is arranged at the output end of the second servo motor, the second driven belt pulley is arranged in the second rotating shaft, and the second belt is wound on the second driving belt pulley and the second driven belt pulley.

8. The non-mechanical contact type excitation magnetic field constant tension output device according to claim 1, characterized in that: the wire outgoing guide wheel is arranged on the rotating frame and located on the periphery of the wire coil, and the tension rod is located on the periphery of the wire outgoing guide wheel.

9. The non-mechanical contact type excitation magnetic field constant tension output device according to claim 1, characterized in that: and a steering guide wheel is arranged on the rotating frame, and the core wire on the wire coil can be led out from the tension rod and then bypasses the steering guide wheel.

10. The utility model provides a back twist pay off rack which characterized in that: the non-mechanical contact type excitation magnetic field constant tension output device comprises a guide wheel bracket and the non-mechanical contact type excitation magnetic field constant tension output device as claimed in any one of claims 1 to 9, wherein the guide wheel bracket is fixed on the rotating frame and positioned at the front end of the rotating frame, a first wire passing guide wheel and a second wire passing guide wheel are pivoted on the guide wheel bracket, the first wire passing guide wheel is arranged at the periphery of the guide wheel bracket, the second wire passing guide wheel is arranged in the middle of the guide wheel bracket, and a core wire can be led out along the central axis direction of the guide wheel bracket after bypassing the first wire passing guide wheel and the second wire passing guide wheel.

Images