CN215896061U

CN215896061U - Three-servo constant-tension tape wrapping mechanism

Info

Publication number: CN215896061U
Application number: CN202122403949.4U
Authority: CN
Inventors: 夏自安
Original assignee: Zhengwei Electrical Technology Jiangsu Co ltd
Current assignee: Zhengwei Electrical Technology Jiangsu Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-02-22
Anticipated expiration: 2031-09-30

Abstract

The utility model discloses a three-servo constant-tension tape wrapping mechanism which comprises three-servo constant-tension output devices, a roller bracket and a central pipe, wherein each three-servo constant-tension output device comprises a first rotating shaft, a second rotating shaft, a tape reel, a first servo motor, a second servo motor, a rotary disc, a third servo motor, a tension rod and a rotary 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 rotating disc is sleeved outside the second rotating shaft, and the third servo motor drives the rotating disc to rotate; the tension rod is connected with the turntable; an absolute encoder is arranged in the third servo motor and used for detecting the position of the tension rod relative to the rotating frame; the rotating frame is fixed at the front end of the second rotating shaft; the belt disc is fixed at the front end of the first rotating shaft; the roller bracket is fixed on the rotating frame; the central tube penetrates through the first rotating shaft and the center of the roller bracket so that the core wires can be conveyed in the tube. The utility model can generate stable and accurate belt releasing tension and has simple structure.

Description

Three-servo constant-tension tape wrapping mechanism

Technical Field

The utility model relates to a constant-tension taping machine, in particular to a three-servo constant-tension taping mechanism.

Background

In the production process of the cable, the core wires and the wrapping belts are respectively output, and meanwhile, the wrapping belts are wrapped on the core wires with certain tension after being adjusted by the tension mechanism, so that the core wires and the wrapping belts are combined to form the cable. The output process of the wrapping tape is output at a constant speed under the condition of keeping constant tension. However, as the tape on the tape reel is unwound, the radius of the tape reel becomes smaller and smaller, the length of the unwound tape per rotation of the tape reel becomes shorter and shorter, and if the tape unwinding speed is not adjusted in time, the tape unwinding stability of the tape reel can be affected. In order to output the wrapping tape more stably, the tape releasing speed of the tape reel needs to be adjusted in time, and the tape releasing tension of the wrapping tape needs to be kept constant. Therefore, there is a need for a constant tension taping mechanism that produces stable, accurate tape unwinding tension, and is simple in construction.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a three-servo constant-tension tape wrapping mechanism which can generate stable and accurate tape laying tension, ensures the tape laying stability and has a simple structure.

In order to achieve the above object, the three-servo constant-tension tape wrapping mechanism provided by the utility model comprises three-servo constant-tension output devices, a roller bracket and a central tube, wherein each three-servo constant-tension output device comprises a first rotating shaft, a second rotating shaft, a tape reel, a first servo motor, a second servo motor, a rotary disk, a third servo motor, a tension rod and a rotary 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 rotary table is rotatably sleeved outside the second rotating shaft, and the third servo motor drives the rotary table to rotate; the first rotating shaft, the second rotating shaft, the belt disc and the rotating disc are coaxially arranged; the tension rod is connected with the rotary table; an absolute encoder is arranged in the third servo motor and used for detecting the position of the tension rod relative to the rotating frame; the rotating frame is fixed at the front end of the second rotating shaft; the belt disc is fixed at the front end of the first rotating shaft; the roller bracket is fixed on the rotating frame and is positioned at the front end of the rotating frame, a first passing roller and a second passing roller are pivoted on the roller bracket, the first passing roller is arranged on the periphery of the roller bracket, and the second passing roller and the first passing roller are positioned on the same diameter direction of the roller bracket and deviate from the center of the roller bracket; the first rotating shaft is of a hollow shaft structure, and the central tube penetrates through the first rotating shaft and the center of the roller bracket so as to convey core wires in the tube; the belt guided out from the belt reel can wrap the core wire after sequentially passing around the rotating frame, the tension rod, the first belt passing roller and the second belt passing roller.

Compared with the prior art, the belt coiling device has the advantages that the tension rod is arranged, so that the belt which is led out from the belt coiling plate bypasses the tension rod, and the third servo motor is used for outputting torque to the tension rod, so that the tension rod provides tension for the belt. Further, by providing an absolute encoder in the third servomotor and detecting a change in the position of the tension lever relative to the rotating frame by the absolute encoder, a change in the unwinding speed can be indirectly detected. By setting the middle position of the tension rod relative to the swing amplitude of the rotating frame as a zero point, when the tension rod moves forwards after crossing the zero point, the speed of releasing the tape of the tape reel is slow, and the first servo motor needs to be controlled to accelerate the tape releasing, otherwise, the speed of releasing the tape of the tape reel is fast, and the first servo motor needs to be controlled to decelerate the tape releasing. Therefore, the belt can be always conveyed at a constant speed with constant and accurate tension, and the structure and the control are very simple and convenient. In addition, because the absolute encoder in the third servo motor can detect the position change of the tension rod, other sensors do not need to be used on the rotating frame or the rotating parts of the tension rod, and therefore the structure of a conducting ring or a carbon brush is not needed to be used for supplying power and transmitting signals, the influence on electric signals is eliminated, and the accuracy of controlling the tension of the unreeling belt is further improved.

Preferably, the three-servo constant tension output device further comprises a transmission assembly, an input end of the transmission assembly is connected with an output end of the third servo motor, and an output end of the transmission assembly is connected with the turntable.

Specifically, the transmission assembly includes first drive pulley, second drive pulley and driving belt, first drive pulley set up in third servo motor's output, second drive pulley set up in on the carousel, driving belt is around locating on first drive pulley and the second drive pulley.

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, a steering roller is arranged on the rotating frame, and the wrapping belt can be led out from the tension rod and then bypasses the steering roller. The steering roller can change the leading-out direction of the belting, so that the belting is more accurately output.

Preferably, a tape discharging roller is arranged on the rotating frame, the tape discharging roller is positioned on the periphery of the tape reel, and the tension rod is positioned on the periphery of the tape discharging roller. Therefore, the surrounding space of the tape reel can be effectively utilized, the structural compactness of the whole device is improved, and the volume of the whole device is smaller.

Preferably, the center of the roller bracket is provided with a central hole, and the central pipe penetrates through the central hole; and the front end of the central tube is provided with a strap eye die for outputting core wires.

Drawings

FIG. 1 is a perspective view of a three-servo constant tension taping mechanism of the present invention.

Fig. 2 is an axial cross-sectional view of a three-servo constant tension taping mechanism of the present invention.

Fig. 3 is a left side view of a three-servo constant tension taping mechanism of the present invention.

FIG. 4 is a structural diagram of a roller carriage of the three-servo constant-tension taping mechanism 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 2, the three-servo constant-tension taping mechanism 100 of the present invention is suitable for releasing tape 200 and wrapping core wires 300, and includes a three-servo constant-tension output device 1, a roller bracket 2 and a central tube 4. The three-servo constant tension output device 1 is arranged on the frame 3 and comprises a first rotating shaft 11, a second rotating shaft 12, a belt disc 13, a first servo motor 14, a second servo motor 15, a bearing seat 16, a third servo motor 17, a rotary disc 18, a tension rod 19 and a rotating frame 110. The tape reel 13 of the present application winds a taping tape 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 reel 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; and bearings are arranged between the front end and the rear end of the second rotating shaft 12 and the bearing seat 16. The turntable 18 is rotatably sleeved outside the second rotating shaft 12, and the third servo motor 17 can drive the turntable 18 to rotate. The third servo motor 17 is arranged on the frame 3 and is internally provided with an absolute encoder which is electrically connected with a control system and can detect the position of the tension rod 19 relative to the rotating frame 110. The first rotating shaft 11, the second rotating shaft 12, the tape reel 13, the bearing seat 16 and the rotating disk 18 are coaxially arranged. The tension rod 19 is connected with the turntable 18, the central axis of the tension rod 19 deviates from the central axis of the first rotating shaft 11 and is parallel to the central axis of the first rotating shaft 11, and the tension rod 19 is provided with a rotatable cylinder body so as to facilitate the winding and conveying of the wrapping tape 200. The rotating frame 110 is fixed to the front end of the second rotating shaft 12 and located at the front end of the rotating disc 18, the rotating frame 110 has a front plate and a rear plate, a tape discharging roller 111 is arranged between the front plate and the rear plate, the tape discharging roller 111 is offset from the central axis of the first rotating shaft 11 and located at the periphery of the tape reel 13, and the central axis of the tape discharging roller 111 is parallel to the central axis of the first rotating shaft 11. The tension rod 19 is positioned at the periphery of the revolution circumference of the belt outlet roller 111; thus, the space around the reel 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 roller 112, and the central axis of the steering roller 112 is perpendicular to the central axis of the rotating frame 110. The direction of the tape 200 can be changed by the turning roller 112, so that the tape 200 can be output more accurately. 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 central angle between the tension rod 19 and any stopper is 60 degrees, preferably 45 degrees.

Referring to fig. 3 and 4, the drum bracket 2 is fixed to the front end of the front plate of the rotating frame 110. The roller support 2 is pivoted with a first passing roller 21 and a second passing roller 22, the first passing roller 21 is arranged on the periphery of the roller support 2, and the second passing roller 22 and the first passing roller 21 are positioned on the same diameter direction of the roller support 2 and are deviated from the center of the roller support 2. More specifically, the roller frame 2 is provided with an elongated slot 2a, and the first threading roller 21 is slidably disposed in the elongated slot 2a to adjust the distance thereof with respect to the center of the roller frame 2, so that the angle of the taping with respect to the core wire 300 can be adjusted. The taping tape 200 drawn from the tape reel 13 is sequentially passed around the tape discharging roller 111, the tension rod 19, the steering roller 112, the first tape passing roller 21 and the second tape passing roller 22 and then drawn forward. The first rotating shaft 11 is of a hollow shaft structure, a central hole 23 is formed in the center of the roller bracket 2, and the central pipe 4 penetrates through the first rotating shaft 11 and the central hole 23 of the roller bracket 2 so as to convey the core wire 300 in the pipe; the central tube 4 and the first rotating shaft 11 are coaxially arranged; the front end of the central tube 4 is provided with a taping die 41 for outputting the core wire 300, and the taping die 41 can output the core wire 300 more stably, so that the accuracy of subsequent taping is ensured, and the quality of taping is improved. The tape 200 drawn from the tape reel 13 sequentially passes around the tape discharging roller 111, the tension rod 19, the steering roller 112, the first tape passing roller 21 and the second tape passing roller 22 and then is wrapped around the core wire 300.

Referring to fig. 2 and 3, the three-servo constant tension output device 1 further includes a transmission assembly 113, an input end of the transmission assembly 113 is connected to an output end of the third servo motor 17, and an output end of the transmission assembly 113 is connected to the turntable 18. Specifically, the transmission assembly 113 includes a first transmission belt pulley 113a, a second transmission belt pulley 113b and a transmission belt 113c, the first transmission belt pulley 113a is disposed at the output end of the third servo motor 17, the second transmission belt pulley 113b is disposed on the rotary table 18 and is fixedly connected to the rotary table 18, and the transmission belt 113c is wound on the first transmission belt pulley 113a and the second transmission belt pulley 113 b.

As shown in fig. 2, a first transmission mechanism 117 is provided between the first servomotor 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, 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 fig. 2 and 3, the operation principle of the three-servo constant tension taping machine 100 of the present invention is described in detail as follows:

first, the core wire 300 is drawn forward along the center pipe 4, and the core wire 300 is drawn forward from the center shaft direction of the drum holder 2 through the center pipe 4 and the drum holder 2. Further, a reel 13 for winding the wrapping tape 200 is attached to the tip of the first rotating shaft 11, and the wrapping tape 200 is drawn out and wound around the tape-out roller 111, the tension rod 19, the steering roller 112, the first threading roller 21, and the second threading roller 22 in this order. When the belt is unwound, the control system controls the first servo motor 14 to start, the first servo motor 14 drives the first driving pulley 117a, and the first driving pulley 117a drives the first driven pulley 117b through the first belt 117 c. The first driven pulley 117b rotates the first rotating shaft 11, and the first rotating shaft 11 rotates the reel 13 to release the wrapping tape 200. Meanwhile, the control system controls the third servo motor 17 to start, at this time, the third servo motor 17 drives the turntable 18 through the transmission assembly 113, and the turntable 18 transmits torque to drive the tension rod 19, so as to generate a constant tension to the wrapping tape 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 belt outlet roller 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 belt 200. At this time, the wrapping tape 200 is discharged with a constant tension and passes through the steering roller 112, the first passing roller 21 and the second passing roller 22 to be wrapped around the core wire 300. The core wire 300 is continuously led out forwards, and meanwhile, the wrapping tape is also continuously output and wraps the core wire 300, and finally, the cable with the insulating outer layer is formed.

The middle position of the tension rod 19 relative to the swing amplitude of the rotating frame 110 is set as a zero point, and when the output speed of the wrapping tape 200 is reduced, the tension rod 19 moves forward beyond the zero point. At this time, the absolute encoder can detect the position change of the tension rod 19 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 accelerate the rotation speed, so as to achieve the purpose of accelerating the tape releasing speed of the tape reel 13. At this time, the tension rod 19 can return to the zero point position, so as to keep the tension of the unreeled tape constant and accurate, and the wrapping tape 200 is output at a constant speed. On the contrary, when the output speed of the strap 200 is increased, the tension rod 19 moves in the negative direction beyond the zero point. At this time, the absolute encoder can detect the position change of the tension rod 19 and send a signal to the control system, the control system controls the output rotation speed of the first servo motor 14 through the signal to slow down the output rotation speed, and the tension rod 19 can return to the zero position, so that the purpose of slowing down the tape releasing speed of the tape reel 13 is achieved, the tape releasing tension is kept constant, and the tape 200 is output at a constant speed.

Compared with the prior art, the utility model has the advantages that the tension rod 19 is arranged, so that the wrapping tape 200 led out from the tape reel 13 bypasses the tension rod 19, and the third servo motor 17 is used for outputting torque to the tension rod 19, so that the tension rod 19 provides tension for the wrapping tape. Further, by providing an absolute encoder in the third servomotor 17 and detecting a change in the position of the tension lever 19 relative to the rotating frame 110 by the absolute encoder, a change in the unwinding speed can be indirectly detected. By setting the middle position of the tension rod 19 relative to the swing amplitude of the rotating frame 110 as a zero point, when the tension rod 19 moves forward beyond the zero point, it is necessary to control the first servo motor 14 to accelerate the tape unwinding speed of the tape reel 13, and conversely, it is necessary to control the first servo motor 14 to decelerate the tape unwinding speed of the tape reel 13 to accelerate the tape unwinding speed. Therefore, the belt can be always conveyed at a constant speed with constant and accurate tension, and the structure and the control are very simple and convenient. In addition, since the absolute encoder in the third servo motor 17 can detect the position change of the tension rod 19, it is not necessary to use other sensors on the rotating parts of the rotating frame 110 or the tension rod 19, and therefore, it is not necessary to use a conductive ring or a carbon brush to supply power and transmit signals, thereby eliminating the influence on the electrical signals and further improving the accuracy of tension control on the tension rod 19.

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

1. The utility model provides a three servo constant tension band mechanisms which characterized in that: the device comprises three servo constant tension output devices, a roller bracket and a central pipe, wherein each three servo constant tension output device comprises a first rotating shaft, a second rotating shaft, a belt disc, a first servo motor, a second servo motor, a rotary disc, a third servo motor, a tension rod and a rotary 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 rotary table is rotatably sleeved outside the second rotating shaft, and the third servo motor drives the rotary table to rotate; the first rotating shaft, the second rotating shaft, the belt disc and the rotating disc are coaxially arranged; the tension rod is connected with the rotary table; an absolute encoder is arranged in the third servo motor and used for detecting the position of the tension rod relative to the rotating frame; the rotating frame is fixed at the front end of the second rotating shaft; the belt disc is fixed at the front end of the first rotating shaft; the roller bracket is fixed on the rotating frame and is positioned at the front end of the rotating frame, a first passing roller and a second passing roller are pivoted on the roller bracket, the first passing roller is arranged on the periphery of the roller bracket, and the second passing roller and the first passing roller are positioned on the same diameter direction of the roller bracket and deviate from the center of the roller bracket; the first rotating shaft is of a hollow shaft structure, and the central tube penetrates through the first rotating shaft and the center of the roller bracket so as to convey core wires in the tube; the belt guided out from the belt reel can wrap the core wire after sequentially passing around the rotating frame, the tension rod, the first belt passing roller and the second belt passing roller.

2. The three-servo constant-tension taping mechanism of claim 1, wherein: the three-servo constant-tension output device further comprises a transmission assembly, the input end of the transmission assembly is connected with the output end of the third servo motor, and the output end of the transmission assembly is connected with the rotary table.

3. The three-servo constant-tension taping mechanism of claim 2, wherein: the transmission assembly comprises a first transmission belt pulley, a second transmission belt pulley and a transmission belt, the first transmission belt pulley is arranged at the output end of the third servo motor, the second transmission belt pulley is arranged on the turntable, and the transmission belt is wound on the first transmission belt pulley and the second transmission belt pulley.

4. The three-servo constant-tension taping mechanism of claim 1, wherein: a first transmission mechanism is arranged between the first servo motor and the first rotating shaft.

5. The three-servo constant-tension taping mechanism of claim 4, wherein: 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 three-servo constant-tension taping mechanism of claim 1, wherein: and a second transmission mechanism is arranged between the second servo motor and the second rotating shaft.

7. The three-servo constant-tension taping mechanism of claim 6, wherein: 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 three-servo constant-tension taping mechanism of claim 1, wherein: the rotating frame is provided with a steering roller, and the wrapping belt can be led out from the tension rod and then bypasses the steering roller.

9. The three-servo constant-tension taping mechanism of claim 1, wherein: a belt outlet roller is arranged on the rotating frame; the tape discharging roller is positioned on the periphery of the tape reel, and the tension rod is positioned on the periphery of the tape discharging roller.

10. The three-servo constant-tension taping mechanism of claim 1, wherein: a central hole is formed in the center of the roller bracket, and the central tube penetrates through the central hole; and the front end of the central tube is provided with a strap eye die for outputting core wires.