CN120397837A - Constant tension pay-off device - Google Patents

Abstract

The present invention discloses a constant tension wire-paying device, comprising a frame and a wire-paying reel, a wire-paying servo motor, a roller, a flexible connector, a rotary servo motor, a tension take-up wheel, a displacement detection assembly, and a servo controller. The wire-paying reel is pivotally connected to the frame, the output end of the wire-paying servo motor is connected to the rotating shaft of the wire-paying reel, the roller rotates around a central axis, and the central axis is arranged on the frame to move linearly, and the core wire is paid out after passing around the roller; one end of the flexible connector is connected to the central axis of the roller, and the other end is eccentrically connected to the tension take-up wheel; the output shaft of the rotary servo motor is connected to the tension take-up wheel to output torque to the tension take-up wheel; the displacement detection assembly detects the rotation angle of the output shaft of the rotary servo motor or the displacement of the detection roller. The present invention can automatically control the tension of the core wire pay-off of the stranding machine, so that the tension and line speed of the cable remain constant, realize digital and intelligent production, and effectively improve production efficiency and cable quality.

Description

Constant tension paying-off device

Technical Field

The invention relates to intelligent cable manufacturing equipment, in particular to a constant-tension paying-off device.

Background

In the field of wire and cable production and manufacturing, there is a device called stranded wire wrapping machine, which generally comprises a paying-off machine, a stranding machine, a wrapping machine and a wire winding machine, when wires are produced, a central line is conveyed to the center of the stranding machine through the paying-off machine, then a plurality of core wires are paid out through the stranding machine, the core wires and the central line are stranded together to form a stranded wire, then the wrapping machine is used for paying out a wrapping belt, the stranded wire is further wrapped, a cable is formed, and finally the cable is rolled and discharged through the wire winding machine. However, in the current process of winding the core wire by the wire stranding machine, as the core wire on the wire coil is continuously wound, the radius of the core wire of the wire coil is smaller and smaller, and the length of the core wire which is wound by each circle of rotation of the wire coil is shorter and shorter, if the rotating speed of the wire winding motor is not timely adjusted, the wire winding tension of the core wire can be affected, the wire winding stability is further affected, and the twisting and subsequent winding of the core wire are affected. In order to make the core wire output more stably, the paying-off speed of the wire coil needs to be adjusted in time, so that the paying-off tension of the core wire is kept constant, and the twisting and wrapping quality of the cable is improved.

Disclosure of Invention

The invention aims to provide a constant tension paying-off device which can automatically control the tension of core wire paying-off, so that the tension and the linear speed of a cable are kept constant, the digital and intelligent production of a stranded wire wrapping machine is realized, and the production efficiency and the quality of the cable are effectively improved.

In order to achieve the above purpose, the invention provides a constant tension paying-off device, which comprises a frame, a paying-off disc, a paying-off servo motor, a roller, a flexible connecting piece, a rotary servo motor, a tension winding wheel, a displacement detection assembly and a servo controller, wherein the paying-off disc is pivoted in the frame, the output end of the paying-off servo motor is connected with a rotating shaft of the paying-off disc so as to drive the paying-off disc to rotate around the central shaft and pay off a core wire, the roller rotates around a central shaft, the central shaft is arranged on the frame in a linear movement mode, the core wire is outwards paid off around the roller, one end of the flexible connecting piece is connected with the central shaft of the roller, the other end of the flexible connecting piece is eccentrically connected with the tension winding wheel, the output shaft of the rotary servo motor is connected with the tension winding wheel so as to output torque to the tension winding wheel, the roller is pulled by the flexible connecting piece to provide tension for the core wire, and the displacement detection assembly detects the rotation angle of the output shaft of the rotary servo motor or detects the displacement of the rotary servo motor and then controls the output rotation speed of the roller by the servo motor. The displacement detection assembly, the rotary servo motor and the paying-off servo motor are respectively and electrically connected with the servo controller.

Compared with the prior art, the paying-off servo motor, the idler wheel, the flexible connecting piece, the rotary servo motor and the tension winding wheel are arranged on the frame, the core wire is wound around the idler wheel to be paid out, the flexible connecting piece is used for connecting the idler wheel and the tension winding wheel, and the rotary servo motor is used for outputting a torque to the tension winding wheel, so that constant tension is generated between the idler wheel and the tension winding wheel. And through setting up displacement detection subassembly, utilize set up displacement detection subassembly automated inspection rotatory servo motor's output shaft rotation angle or detect the displacement of gyro wheel, when detecting the rotation angle of output shaft or detect after the position of gyro wheel changes, can adjust through servo controller the rotational speed of unwrapping wire servo motor to the linear velocity of automatically regulated heart yearn, and then reached the tension of automatic control heart yearn and made wire rod tension and wire rod travel speed keep invariable. The whole process only needs to set the output torque of the rotary servo motor through a servo controller, and the displacement detection assembly is used for monitoring and feeding back by combining with the servo controller. Therefore, the scheme can digitally adjust the setting parameters of the rotary servo motor, the displacement detection assembly and the servo controller, is favorable for realizing digital and intelligent production, effectively improves the production efficiency and improves the quality of cables.

Preferably, the displacement detection component is an angular displacement sensor.

Specifically, the angular displacement sensor is an absolute value encoder, and the absolute value encoder is arranged on the tail part of the output shaft of the rotary servo motor and is electrically connected with the servo controller so as to detect the rotation angle of the output shaft of the rotary servo motor.

Preferably, the displacement detection component is a linear displacement sensor.

Specifically, the linear displacement sensor comprises a Hall sensor and an induction plate, wherein the Hall sensor is arranged on the frame and electrically connected with the servo controller, the induction plate is connected with the center shaft and provided with a magnet, and the Hall sensor detects the position of the induction plate. Through setting up position sensor and induction plate, can detect the displacement of gyro wheel to also can pass through servo controller automatically regulated unwrapping wire servo motor's rotational speed, and then reached the tension and the unwrapping wire linear velocity of automatic control heart yearn and made wire rod tension and wire rod travel speed keep invariable.

Specifically, a transmission mechanism is arranged between the pay-off servo motor and the rotating shaft of the pay-off disc. Through setting up drive mechanism, drive mechanism can reduce the output rotational speed of unwrapping wire servo motor to the adaptation the unwrapping wire speed of unwrapping wire reel.

Specifically, the transmission mechanism comprises a driving belt pulley, a driven belt pulley and a transmission belt, wherein the driving belt pulley is connected with the output end of the pay-off servo motor, the driven belt pulley is connected with one end of a rotating shaft of the pay-off disc, and the transmission belt respectively surrounds the driving belt pulley and the driven belt pulley.

Specifically, two parallel and spaced guide rails are arranged on the frame, two ends of the center shaft are connected with sliding sleeves, and the sliding sleeves are sleeved on the guide rails in a sliding manner. Through setting up the guide rail, make the gyro wheel can be followed the guide rail slides, realizes the regulation of position, can be simultaneously with the help of flexible connection piece drives tension take-up pulley drives rotatory servo motor's output shaft rotates certain angle, so that take absolute value encoder detects, realizes constant tension output.

Specifically, the constant tension paying-off device further comprises a connecting frame, one end of the connecting frame is fixedly connected with one end of the central shaft, the other end of the connecting frame is fixedly connected with the other end of the central shaft, and the flexible connecting piece is connected to the middle of the connecting frame. Through setting up the link, make flexible connector is located the intermediate position of gyro wheel, and with tension take-up pulley is just right to reach the balanced purpose of atress, improve the stability of equipment operation.

Specifically, the constant tension paying-off device further comprises a guide wheel, wherein the guide wheel is pivoted to the frame and located between the paying-off disc and the roller, and the core wire winds around the roller and then is output around the guide wheel.

Specifically, the outside of frame is equipped with the installing support, servo controller installs in on the installing support. Therefore, the servo controller can rotate along with the rotation of the frame, the connection is simple, the servo controller is prevented from being arranged outside the rotating bracket, the connection structure is simplified, and the control is very stable.

Drawings

Fig. 1 is a structural view of a multi-core wire strander of the present invention.

Fig. 2 is a top view of the multi-core wire strander of the present invention.

Fig. 3 is a structural view of a multi-core wire strander of the present invention.

Fig. 4 is a side view of a multi-core strander of the invention.

Fig. 5 is a block diagram of a constant tension pay-off device of the multi-core wire stranding machine of the present invention.

Fig. 6 is a top view of a constant tension payout device of the multi-core wire stranding machine of the present invention.

Fig. 7 is a schematic diagram of the electrical connections of the modules of the multi-wire stranding machine of the present invention.

Fig. 8 is a block diagram of another embodiment of a constant tension payout device of the multi-core wire stranding machine of the present invention.

Detailed Description

In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.

Referring to fig. 1,2 and 7, the present invention discloses a multi-core wire stranding machine 100, which comprises a central wire paying-off machine (not labeled in the drawings), a multi-core wire stranding machine 1, a forming die 2, a wrapping device 3, a double-wheel drawing device 4, a wire winding machine 5 and a control system 6 which are sequentially arranged. The central line paying-off machine pays out a central line 200 to the multi-core wire stranding machine 1, and the multi-core wire stranding machine 1 pays out a plurality of core wires 300 and stranding the core wires with the central line 200 to form stranded wires. The wrapping device 3 releases wrapping tape and wraps the stranded wires to form a cable, and the wire winding machine 5 winds the cable. The forming die 2 is arranged between the multi-core wire stranding machine 1 and the wrapping device 3, and the stranded wires pass through the forming die 2. The double-wheel drawing device 4 is arranged between the wrapping device 3 and the wire winding machine 5, and the cables are respectively wound on two drawing wheels of the double-wheel drawing device 4. The central line paying-off machine, the multi-core line stranding machine 1, the wrapping device 3 and the wire collecting machine 5 are respectively in communication connection with the control system 6, and for example, mutual transmission of signals can be realized through wireless connection.

Referring to fig. 3 and 4, the multi-core wire stranding machine 1 includes a frame 11, a rotating support 12, a rotating shaft 13, a driving mechanism 14 and at least two constant tension paying-off devices 15, wherein the number of the constant tension paying-off devices 15 in the embodiment is four, the four constant tension paying-off devices 15 are uniformly distributed on the rotating support 12 around the central axis of the rotating support 12, and the structures of the four constant tension paying-off devices 15 are the same. The rotating bracket 12 is coaxially fixed to the rotating shaft 13. The rotating shaft 13 is transversely arranged on the frame 11, two ends of the rotating shaft 13 are rotatably arranged on the frame 11 through bearings, a central hole 131 penetrating through the two ends of the rotating shaft 13 is formed along the central axis of the rotating shaft, and the central axis 200 penetrates through the central hole 131. The rotating shaft 13 is provided with channels 132 corresponding to the constant tension paying-off devices 15 one by one and deviating from the central hole 131, and each constant tension paying-off device 15 simultaneously pays out the core wire 300, so that each core wire 300 passes through each channel 132 and finally protrudes from the outlet to be close to the central line 200. The driving mechanism 14 is disposed on the frame 11 and drives the rotation shaft 13 and the rotation bracket 12 to rotate, so that all the core wires 300 are twisted with the center wire 200.

As further shown in fig. 4, the driving mechanism 14 includes a motor 141, a first driving pulley 142, a first driven pulley 143, and a first belt 144, wherein the motor 141 is disposed on the frame 11, the first driving pulley 142 is connected to an output end of the motor 141, the first driven pulley 143 is connected to the rotating shaft 13, and the first belt 144 is wound between the first driving pulley and the first driven pulley 143.

Referring to fig. 5 to 7, the constant tension paying-off device 15 includes a frame 151, a paying-off reel 152, a paying-off servo motor 153, a roller 154, a flexible connector 155, a rotary servo motor 156, a tension reel 157, a displacement detection assembly and a servo controller 159, which are disposed in the frame 151. The displacement detection component in this embodiment is an angular displacement sensor, specifically, the angular displacement sensor is an absolute value encoder 158. The frame 151 has an elongated structure, and two ends thereof are fixedly connected to the rotating bracket 12, respectively. The pay-off reel 152 is pivotally connected to the frame 151, and an output end of the pay-off servo motor 153 is connected to a rotating shaft 1521 of the pay-off reel 152, so as to drive the pay-off reel 152 to rotate and pay out the core wire 300. The rotating shaft 1521 of the pay-off reel 152 is perpendicular to the central axis of the central hole 131. The roller 154 rotates around a central shaft 1541, and the central shaft 1541 is linearly movably disposed on the frame 151, and a central axis of the central shaft 1541 is perpendicular to a central axis of the central hole 131. The core wire is fed out in a direction opposite to the feeding direction of the center wire 200, and is fed out from the outside around the roller 154 and fed into the passage 132 from the inside in the same direction as the feeding direction of the center wire 200. One end of the flexible connecting member 155 is connected to a central shaft 1541 of the roller 154, the other end of the flexible connecting member 155 is eccentrically connected to the tension reel 157, and the flexible connecting member 155 is a wire rope. An output shaft of the rotary servo motor 156 is connected to the tension reel 157 to output torque to the tension reel 157, thereby pulling the roller 154 through the flexible connection 155 to provide tension to the core wire. The absolute value encoder 158 is disposed on the tail of the output shaft of the rotary servo motor 156 and electrically connected to the servo controller to detect the rotation angle of the output shaft of the rotary servo motor 156, and the absolute value encoder 158, the rotary servo motor 156 and the pay-off servo motor 153 are electrically connected to the servo controller 159. Specifically, the absolute value encoder 158 can detect how much the output shaft of the rotary servo motor 156 rotates, the origin of the output shaft, i.e., the 0-point angle, can be defined on the absolute value encoder 158 according to half of this angle, the clockwise rotation is set to be positive from the 0-point angle, the absolute value encoder 158 detects the output shaft rotating to this angle and outputs a positive value, the 0-point position counterclockwise rotation is set to be negative, the absolute value encoder 15 detects the output shaft rotating to this angle and then feeds back this positive or negative value to the servo controller 159. The servo controller 159 is communicatively coupled to the control system 6. In this embodiment, the angular displacement sensor may also be another known type of angular displacement sensor, such as an inductive angular displacement sensor, a potentiometer type angular displacement sensor, an incremental encoder, or the like.

As shown in fig. 8, in another embodiment, the displacement detection assembly is a linear displacement sensor, and specifically, the linear displacement sensor includes a hall sensor 160 and a sensing board 161, where the hall sensor 160 is disposed on the frame 151 and electrically connected to the servo controller 159. The sensing plate 161 is coupled to the central shaft 1541 and provided with a magnet. The sensing plate 161 has a sensing inclined plane, the magnet is disposed on the sensing inclined plane, and the distance between each point of the magnet and the hall sensor 160 is gradually changed, specifically, the distance between the two points is gradually reduced along the moving direction of the roller 154 near the pay-off reel 152. The hall sensor 160 detects the position of the sensing plate 161. Specifically, the roller 154 moves by a certain displacement amount, which may be defined as an origin of the roller 154, that is, a 0-point position, where the 0-point position is set to be positive near the pay-off reel 152, the hall sensor 160 detects that the roller 154 is positive in this position, and the opposite side of the 0-point position is set to be negative, the hall sensor 160 detects that the roller 154 is negative in this position, and then feeds back the positive or negative value to the servo controller 159. The displacement of the roller 154 can be detected by providing the hall sensor 160 and the sensor plate 161, so that the rotation speed of the paying-off servo motor 153 can be automatically adjusted by the servo controller 159, and further, the tension of the core wire and the paying-off linear speed can be automatically controlled, and the tension of the wire and the moving speed of the wire can be kept constant. Of course, the linear displacement sensor may also employ other known forms of linear displacement sensor, such as an inductive linear displacement sensor, a capacitive linear displacement sensor, and the like.

As shown in fig. 5 and 6, a transmission mechanism 162 is provided between the pay-off servo motor 153 and the rotating shaft of the pay-off reel 152. By providing the transmission mechanism 162, the transmission mechanism 162 may reduce the output rotation speed of the pay-off servo motor 153, thereby adapting the pay-off speed of the pay-off reel 152. Specifically, the transmission mechanism 162 includes a second driving pulley 1621, a second driven pulley 1622, and a transmission belt 1623, the second driving pulley 1621 is connected to the output end of the pay-off servo motor 153, the second driven pulley 1622 is connected to one end of the rotating shaft of the pay-off reel 152, and the transmission belt 1623 surrounds the second driving pulley 1621 and the second driven pulley 1622, respectively.

Referring to fig. 5 and 6, two parallel and spaced guide rails 1511 are disposed on the frame 151, two ends of the central shaft 1541 are connected to sliding sleeves 1542, and the sliding sleeves 1542 are respectively slidably sleeved on the two guide rails 1511. The guide rail 1511 is a cylindrical polish rod, and the sliding sleeve 1542 is a linear bearing. By arranging the guide rail 1511, the roller 154 can slide along the guide rail 1511, so that the position adjustment is realized, and meanwhile, the flexible connecting piece 155 can drive the tension winding wheel 157 to drive the output shaft of the rotary servo motor 156 to rotate by a certain angle, so that the absolute value encoder 158 can detect the tension, and the constant tension output is realized.

Referring to fig. 5 and 6, the constant tension paying-off device 15 further includes a connecting frame 163, one end of the connecting frame 163 is fixedly connected with one end of the central shaft 1541, the other end of the connecting frame 163 is fixedly connected with the other end of the central shaft 1541, and the flexible connecting member 155 is connected to the middle part of the connecting frame 163. The connecting frame 16 is a U-shaped rod. By arranging the connecting frame 163, the connecting point of the flexible connecting piece 155 is opposite to the tension winding wheel 157 at the middle position of the roller 154, so that the purpose of balancing stress is achieved, and the running stability of equipment is improved.

Referring to fig. 5 and 6, the constant tension paying-off device 15 further includes a guide wheel 164, wherein the guide wheel 164 is pivotally connected to the frame 151 and located between the paying-off reel 152 and the roller 154, and the guide wheel 164 is located on the inner side of the frame 151 near the rotating support 12, and the core wire 300 passes around the roller 154 and then enters the channel 132 after passing around the guide wheel 164.

As further shown in fig. 5, a mounting bracket 1512 is provided on one side of the middle portion of the frame 151, and the servo controller 159 is mounted on the mounting bracket 1512. In this way, the servo controller 159 can rotate along with the rotation of the frame 151, the connection is simple, the servo controller 159 is prevented from being arranged outside the rotary bracket 12, the connection structure is simplified, and the control is very stable.

As shown in fig. 5, a counterweight wheel 1522 is disposed at an end of the rotating shaft 1521 away from the second driven pulley 1622. In this way, the pay-off reel 152 is uniformly stressed, which is beneficial to reducing vibration and prolonging the service life of the rotating shaft of the pay-off reel 152.

In summary, with reference to fig. 1 and 2, the following describes the working principle of the multi-core wire stranding machine 100 according to the present invention in detail, as follows:

Firstly, the previous threading is performed before the operation, specifically, firstly, the center line 200 of the center line paying-off machine sequentially passes through the center hole 131, the forming die 2, the wrapping device 3, the double-wheel drawing device 4 and the winding machine 5 of the multi-core wire stranding machine 1, meanwhile, each constant tension paying-off device 15 on the multi-core wire stranding machine 1 is paid out a section of core wire 300, so that the core wires 300 respectively pass through the center hole 131 and the forming die 2 of the multi-core wire stranding machine 1, the wrapping device 3 and the double-wheel drawing device 4 to be stranded into a section of cable with the center line 200, and finally, the cable is wound by the winding machine 5. During operation, the control system 6 controls the central line paying-off machine, the multi-core wire stranding machine 1, the wrapping device 3 and the wire winding machine 5 to start, the central line paying-off machine pays out the central line 200, the four constant tension paying-off devices 15 pay out the core wires 300 simultaneously, meanwhile, the driving mechanism 14 drives the rotating shaft 13 to rotate so as to drive the rotating bracket 12 to rotate, in the rotating process, the four core wires 300 are paid out and collected with the central line 200 at the forming die 2, and under the rotating action of the rotating bracket 12, the four core wires 300 are stranded together around the central line 200 to form stranded wires. Thereafter, the strands move forward through the central hole 131 of the wrapping device 3, and at the same time, the wrapping device 3 releases the wrapping tape, which is rotated around the strands by the rotating bracket 12 of the wrapping device 3 and wrapped around the outer surfaces of the strands to form a cable. Then, the cable is wound on the two-wheel picking device 4 in a forward moving way and then is wound by the winding machine 5.

In addition, the paying-off principle of the constant tension paying-off device 15 is that the paying-off servo motor 153 and the rotary servo motor 156 are started, the rotary servo motor 156 outputs a torque with a certain value, and the flexible connecting member 155 provides tension for the core wire through the tension winding wheel 157. The pay-off servo motor 153 drives the pay-off reel 152 to rotate through the transmission mechanism 162, the pay-off reel 152 continuously pays out the core wire 300, and the core wire passes through the roller 154 and the guide wheel, enters the channel 132, finally comes out of the channel 132 and is gathered near the center line 200. As the core wire 300 is continuously paid out from the pay-off reel 152, the diameter of the core wire 300 on the pay-off reel 152 around one circle of the pay-off reel 152 is smaller, the length of the core wire per circle of the pay-off reel is smaller, and the pay-off tension is increased, so that the roller 154 is driven to move towards the direction approaching the pay-off reel 152. The roller 154 drives the tension reel 157 to rotate by a certain angle through the flexible connecting piece 155, and the tension reel 157 drives the output shaft of the rotary servo motor 156 to rotate by a certain angle. At this time, after the absolute value encoder 158 detects the rotation of the output shaft, a positive signal is sent to the servo controller 159 (in another embodiment, a positive signal is sent to the servo controller 159 after the position of the roller 154 is detected by the hall sensor 160), the servo controller 159 controls the pay-off servo motor 153 to increase the output rotation speed, so that the rotation speed of the pay-off reel 152 is increased, the pay-off speed is ensured to be consistent with the initial speed, and the output shaft of the rotary servo motor 156 returns to the initial position until the tension of the core wire 300 and the pay-off speed are always kept constant.

Compared with the prior art, the invention has the advantages that at least two constant tension paying-off devices 15 are arranged on the rotary support 12, the paying-off servo motor 153, the idler wheel 154, the flexible connecting piece 155, the rotary servo motor 156 and the tension winding wheel 157 are arranged on the constant tension paying-off devices 15, the core wire is paid out around the idler wheel 154, the idler wheel 154 and the tension winding wheel 157 are connected by the flexible connecting piece 155, and a torque is output to the tension winding wheel 157 by the rotary servo motor 156, so that a constant tension is generated between the idler wheel 154 and the tension winding wheel 157. By arranging the absolute value encoder 158 at the output end of the rotary servo motor 156, the absolute value encoder 158 is utilized to automatically detect the rotation angle of the output shaft of the rotary servo motor 156, and when detecting that the rotation angle of the output shaft changes, the control system 6 can adjust the rotation speed of the paying-off servo motor 153, thereby automatically adjusting the linear speed of the core wire 300, further automatically controlling the tension of the core wire 300 and keeping the tension and the moving speed of the wire constant. The whole process only needs to set the output torque of the rotary servo motor 156 through the servo controller 159, and the absolute value encoder 158 is used to monitor and feed back the output shaft of the rotary servo motor 156 in combination with the servo controller 159. Therefore, the rotary servo motor 156 and the absolute value encoder 158 can be digitally adjusted to set parameters, which is favorable for realizing digital and intelligent production, effectively improving the production efficiency and improving the quality of cables.

The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims (9)

1. A constant tension paying-off device is characterized by comprising a frame, a paying-off disc, a paying-off servo motor, a roller, a flexible connecting piece, a rotary servo motor, a tension winding wheel, a displacement detection assembly and a servo controller, wherein the paying-off disc is arranged in the frame, the paying-off disc is pivoted in the frame, the output end of the paying-off servo motor is connected with a rotating shaft of the paying-off disc so as to drive the paying-off disc to rotate around the roller and pay off a core wire, the roller rotates around a center shaft, the center shaft is linearly movably arranged on the frame, the core wire is outwards paid out around the roller, one end of the flexible connecting piece is connected with the center shaft of the roller, the other end of the flexible connecting piece is eccentrically connected with the tension winding wheel, an output shaft of the rotary servo motor is connected with the tension winding wheel so as to output torque to the tension winding wheel, the roller is pulled by the flexible connecting piece to provide tension for the core wire, the displacement detection assembly detects the rotation angle of the output shaft of the rotary servo motor or detects the displacement of the roller, and then the rotation servo motor is controlled by the servo motor to control the output of the rotary servo motor and the displacement servo motor to be electrically connected with the paying-off servo motor.

2. The constant tension paying-off device according to claim 1, wherein the displacement detecting component is an angular displacement sensor, the angular displacement sensor is an absolute value encoder, and the absolute value encoder is arranged on the tail of the output shaft of the rotary servo motor and is electrically connected with the servo controller to detect the rotation angle of the output shaft of the rotary servo motor.

3. The constant tension paying-off device according to claim 1, wherein the displacement detecting component is a linear displacement sensor, the linear displacement sensor comprises a Hall sensor and an induction plate, the Hall sensor is arranged on the frame and is electrically connected with the servo controller, the induction plate is connected with the center shaft and is provided with a magnet, and the Hall sensor detects the position of the induction plate.

4. The constant tension paying-off device according to claim 1, wherein a transmission mechanism is arranged between the paying-off servo motor and a rotating shaft of the paying-off disc.

5. The constant tension payout device according to claim 4, wherein the transmission mechanism includes a second driving pulley, a second driven pulley, and a transmission belt, the second driving pulley is connected to an output end of the payout servo motor, the second driven pulley is connected to one end of the rotating shaft of the payout disc, and the transmission belt is respectively wound around the second driving pulley and the second driven pulley.

6. The constant tension paying-off device according to claim 1, wherein the frame is provided with two parallel and spaced guide rails, two ends of the center shaft are connected with sliding sleeves, and the sliding sleeves are sleeved on the guide rails in a sliding manner.

7. The constant tension paying-off device according to claim 1, further comprising a connecting frame, wherein one end of the connecting frame is fixedly connected with one end of the central shaft, the other end of the connecting frame is fixedly connected with the other end of the central shaft, and the flexible connecting piece is connected to the middle part of the connecting frame.

8. The constant tension payout device according to claim 1, further comprising a guide wheel pivotally connected to the frame and positioned between the payout reel and the roller, wherein the core wire is fed around the guide wheel after passing around the roller.

9. The constant tension paying-off device according to claim 1, wherein a mounting bracket is arranged on the outer side of the frame, and the servo controller is mounted on the mounting bracket.