An automatic tension adjustment pay-off device

Abstract

The utility model relates to cable pay -off device technical field discloses an automatic regulation tension pay -off device, including pay -off reel frame, pay -off reel frame axle, dynamic torque sensor and coupling, the pay -off reel frame is located on pay -off reel frame axle, and the one side disc of pay -off reel frame is connected dynamic torque sensor through elastic coupling, one end of pay -off reel frame axle is provided with the apron, and the apron is away from the one side disc of pay -off reel frame and is connected with the axial clearance between the elastic coupling, the utility model aims at solving the problem of the existing cabling machine axial force damage measurement concentricity, leads to dynamic torque sensor precision decline, reduces single pay -off reel tension abrupt change, promotes the uniformity of cable stretching.

Description

Technical Field

[0001] This utility model relates to the technical field of cable laying devices, specifically to an automatic tension-adjusting cable laying device. Background Technology

[0002] A cable forming machine is a key piece of equipment that strands multiple insulated wire cores into a cable core according to specific rules. Its core structure includes a pay-off device, a winding die, a wrapping mechanism, and a traction system. The pay-off device consists of multiple pay-off reels that hold the wire cores. Driven by a power system, the winch rotates the pay-off reels to complete the stranding process. This process has strict requirements for tension control; an ideal cable forming process requires maintaining constant and balanced tension in each wire core. This is a fundamental condition for ensuring the uniformity of the cable structure and meeting electrical performance standards.

[0003] The mechanical tension control systems commonly used in the industry currently suffer from three significant problems: First, relying on manual adjustment makes it difficult to achieve stable tension throughout the entire process, resulting in tension fluctuations during actual operation. Second, sudden tension changes can easily occur on individual wire reels during equipment operation, leading to excessive stretching of individual wire cores, reducing conductor cross-sectional area, and directly affecting the cable's conductivity. Third, uneven tension among multiple wire cores can cause differences in stranding tightness, potentially leading to structural defects such as insulation layer eccentricity in severe cases. These problems not only reduce product yield but may also create safety hazards.

[0004] To improve tension control accuracy, the new generation of cable-forming machines has introduced an intelligent control system combining dynamic torque sensors and PLCs, which controls tension fluctuations through real-time monitoring and closed-loop adjustment. However, this technology still faces the challenge of mechanical interference: the axial and radial forces generated by the cable on the shaft during the unwinding process can disrupt the coaxiality of the measurement, leading to a decrease in the accuracy of the dynamic torque sensor. This interference is particularly noticeable during high-speed production, becoming a major bottleneck restricting the accuracy of tension control. Utility Model Content

[0005] To address the existing problems, this utility model aims to provide an automatic tension adjustment wire feeding device to solve the problem of axial force damage to the coaxiality measurement of existing cable forming machines, which leads to a decrease in the accuracy of dynamic torque sensors, reduce sudden tension changes in a single wire feeding reel, and improve the uniformity of cable stretching.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] This utility model provides an automatic tension-adjusting wire feeding device, including a wire feeding reel frame, a wire feeding reel frame shaft, a dynamic torque sensor, and a coupling; the wire feeding reel frame is sleeved on the wire feeding reel frame shaft, and one side of the wire feeding reel frame is connected to the dynamic torque sensor through an elastic coupling; one end of the wire feeding reel frame shaft is provided with a cover plate, and an axial gap is left between the cover plate and the side of the wire feeding reel frame away from the side connected to the elastic coupling.

[0008] As a further improvement of this utility model, it also includes a drive motor, a telescopic transmission shaft, a force transmission gear, and a drive gear; the drive gear is provided on the side of the wire feeding reel frame away from the side connected to the flexible coupling; the drive gear meshes with the force transmission gear, and the force transmission gear is connected to the drive motor through the telescopic transmission shaft.

[0009] As a further improvement of this utility model, the flexible coupling is a bellows coupling.

[0010] As a further improvement of this utility model, the bellows coupling can reserve 50mm of axial compensation space.

[0011] As a further improvement of this utility model, the coaxiality of the bellows coupling, cable reel and dynamic torque sensor is less than or equal to Φ0.03mm.

[0012] As a further improvement of this utility model, the bellows coupling adopts a multi-layer bellows.

[0013] As a further improvement of this utility model, the bellows coupling is made of 304 stainless steel or Hastelloy.

[0014] As a further improvement of this utility model, the wire feeding reel frame shaft is also fitted with a stop block, which is located between the cover plate and the wire feeding reel frame.

[0015] As a further improvement of this utility model, the stop is an elastic damping body.

[0016] As a further improvement of this utility model, it also includes a heat dissipation device, wherein the heat dissipation area of ​​the heat dissipation device covers the flexible coupling.

[0017] This utility model has the following beneficial effects:

[0018] By combining the wire reel frame, wire reel frame shaft, dynamic torque sensor, and flexible coupling, dynamic monitoring of the tension of the wire reel frame can be achieved, providing basic data for automatic tension adjustment. The cover plate has an axial clearance with one side of the wire reel frame, which can avoid axial torque on the dynamic torque sensor when the wire reel frame moves axially, reduce measurement interference, reduce sudden tension changes in a single wire reel frame, and improve the uniformity of cable stretching.

[0019] Preferably, the arrangement of the drive motor, telescopic transmission shaft, force transmission gear, and drive gear provides driving power for the pay-off reel frame, enabling the pay-off reel frame to rotate and pay off the wire according to the set requirements; the telescopic transmission shaft can adapt to certain installation errors and displacement changes during the movement process, ensuring the stability of power transmission.

[0020] Preferably, a bellows coupling is used, which has good flexibility and compensation capability, and can compensate for axial, radial and angular deviations between the pay-off reel frame shaft and the dynamic torque sensor, reduce transmission errors caused by installation errors or displacement during operation, and improve the accuracy of torque measurement.

[0021] Preferably, using a bellows coupling allows for a 50mm axial compensation space, which can better accommodate the large axial displacement that may occur during the operation of the wire reel frame shaft. This ensures that the axial floating of the wire reel frame during the wire winding and unwinding process has a large degree of freedom, and avoids damage to the coupling or affecting the measurement accuracy of the dynamic torque sensor due to excessive axial displacement.

[0022] Preferably, the coaxiality of the bellows coupling, cable reel, and dynamic torque sensor is less than or equal to Φ0.03mm, which can ensure the accuracy and stability of torque transmission, reduce the additional torque and vibration caused by coaxiality deviation, improve the operating accuracy and reliability of the entire device, and extend the service life of the equipment.

[0023] Preferably, a bellows coupling using multi-layer bellows has higher strength and flexibility compared to a single-layer bellows, can withstand greater torque and compensate for greater displacement, and can also better isolate vibration, further improving the stability and reliability of the device.

[0024] Preferably, the bellows coupling is made of 304 stainless steel or Hastelloy. These two materials have good corrosion resistance and high strength, and can work stably for a long time in various harsh environments, reducing coupling damage caused by material corrosion and improving the durability and reliability of the device.

[0025] Preferably, a stop block is fitted on the shaft of the pay-off reel frame and located between the cover plate and the pay-off reel frame. This can limit the axial movement of the pay-off reel frame, prevent the pay-off reel frame from being damaged by excessive axial movement due to unexpected circumstances during operation, and ensure the safe operation of the device.

[0026] Preferably, the stop is made of an elastic damping body, which can not only limit the movement but also absorb the impact energy generated when the wire reel moves axially, reduce vibration and noise, further protect the equipment, and improve the stability of the device's operation.

[0027] Preferably, the installation of heat dissipation equipment and the covering of the heat dissipation area with the flexible coupling can effectively reduce the heat generated by the flexible coupling during operation due to friction and other reasons, prevent the coupling from degrading or being damaged due to excessive temperature, ensure the normal operation of the coupling, extend its service life, and improve the reliability of the entire device. Attached Figure Description

[0028] The accompanying drawings described herein are for illustrative purposes only and do not limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. In the drawings:

[0029] Figure 1 Side view of the conventional dynamic torque sensor setup for the wire feeding device;

[0030] Figure 2 This is a schematic cross-sectional view of an automatic tension-adjusting wire feeding device in Example 1;

[0031] Figure 3 This is a schematic diagram of the bellows coupling of an automatic tension-adjusting wire feeding device in Example 1;

[0032] Figure 4 This is a cross-sectional schematic diagram of the heat dissipation device of an automatic tension-adjusting wire feeding device in Embodiment 2;

[0033] Figure 5 This is a schematic cross-sectional view of the stop block of an automatic tension-adjusting wire feeding device in Embodiment 3;

[0034] The components include: 1. Cable; 2. Cable reel frame; 3. Dynamic torque sensor measuring shaft; 4. Dynamic torque sensor magnetic pole ring; 5. Cable reel frame shaft; 6. Cover plate; 7. Flexible coupling; 8. Drive gear; 9. Force transmission gear; 10. Telescopic transmission shaft; 11. Drive motor; 12. Heat dissipation equipment; and 13. Stop block. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0036] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Example 1

[0039] like Figure 1 As shown, the conventional setting method for the dynamic torque sensor in the wire-laying device is as follows:

[0040] The wire feeding reel 2 is sleeved on the wire feeding reel shaft 5, and a dynamic torque sensor is connected to one side of the wire feeding reel 2. A cover plate 6 is provided at one end of the wire feeding reel shaft 5, and there is no axial gap between the cover plate 6 and the side of the wire feeding reel 2 away from the side connected to the elastic coupling 7.

[0041] like Figure 2 As shown, this embodiment provides an automatic tension-adjusting wire feeding device, including a wire feeding reel frame 2, a wire feeding reel frame shaft 5, a dynamic torque sensor, a coupling 7, a drive gear 8, a force transmission gear 9, a telescopic transmission shaft 10, and a drive motor 11. The wire feeding reel frame 2 is sleeved on the wire feeding reel frame shaft 5, and one side of the wire feeding reel frame 2 is connected to the dynamic torque sensor via the elastic coupling 7. One end of the wire feeding reel frame shaft 5 is provided with a cover plate 6, and an axial gap is left between the cover plate 6 and the side of the wire feeding reel frame 2 away from the side connected to the elastic coupling 7. The axial gap is less than or equal to 50 mm. The drive gear 8 is provided on the side of the wire feeding reel frame 2 away from the side connected to the elastic coupling 7; the drive gear 8 meshes with the force transmission gear 9, and the force transmission gear 9 is connected to the drive motor 11 via the telescopic transmission shaft 10.

[0042] Preferably, the coaxiality between the drive gear 8 and the wire feeding reel 2 is less than or equal to Φ0.03mm.

[0043] The dynamic torque sensor includes a dynamic torque sensor measuring shaft 3 and a dynamic torque sensor magnetic pole ring 4. The dynamic torque sensor magnetic pole ring 4 can be replaced by a fiber optic grating.

[0044] like Figure 3As shown, the flexible coupling 7 is a bellows coupling.

[0045] The bellows coupling can be reserved with a 50mm axial compensation space. The flexible coupling 7 needs to be reserved with a ≥50mm axial compensation space (bellows coupling compensation ±50mm). The axial displacement ΔL generated when the cable reel 2 rotates should meet the following requirement: ΔL ≤ bellows compensation - 10% safety margin. When the axial compensation space requirement is not high, a cross-slider coupling can also be selected as the flexible coupling.

[0046] The coaxiality of the bellows coupling, the wire reel frame 2, and the dynamic torque sensor is less than or equal to Φ0.03mm.

[0047] The bellows coupling uses multi-layer bellows, typically 3-5 layers.

[0048] The bellows coupling is made of 304 stainless steel or Hastelloy.

[0049] Example 2

[0050] The difference between this embodiment and Embodiment 1 is that:

[0051] 1) It also includes a heat dissipation device 12, the heat dissipation area of ​​which covers the flexible coupling 7.

[0052] like Figure 4 As shown, this embodiment also includes a heat dissipation device 12, the heat dissipation area of ​​which covers the flexible coupling 7. The heat dissipation device is used to reduce the thermal expansion of the coupling and the temperature drift of the sensor.

[0053] Example 3

[0054] The difference between this embodiment and Embodiment 1 is that:

[0055] 1) The wire feeding reel frame shaft 5 is also fitted with a stop block 13, which is located between the cover plate 6 and the wire feeding reel frame 2;

[0056] 2) The stop 13 is an elastic damping body.

[0057] like Figure 5 As shown, the wire reel frame shaft 5 is also fitted with a stop block 13, which is located between the cover plate 6 and the wire reel frame 2. The stop block 13 is an elastic damping body, which not only limits the movement but also absorbs the impact energy generated when the wire reel frame 2 moves axially, reducing vibration and noise, further protecting the equipment and improving the stability of the device's operation.

[0058] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. An automatic tension-adjusting wire feeding device, characterized in that, It includes a pay-off reel frame, a pay-off reel frame shaft, a dynamic torque sensor, and a coupling; the pay-off reel frame is sleeved on the pay-off reel frame shaft, and one side of the pay-off reel frame is connected to the dynamic torque sensor through an elastic coupling; one end of the pay-off reel frame shaft is provided with a cover plate, and an axial gap is left between the cover plate and the side of the pay-off reel frame away from the side connected to the elastic coupling.

2. The automatic tension-adjusting wire feeding device according to claim 1, characterized in that, It also includes a drive motor, a telescopic transmission shaft, a force transmission gear, and a drive gear; the drive gear is provided on the side of the wire feeding reel away from the flexible coupling; the drive gear meshes with the force transmission gear, and the force transmission gear is connected to the drive motor through the telescopic transmission shaft.

3. The automatic tension-adjusting wire feeding device according to claim 1, characterized in that, The flexible coupling is a bellows coupling.

4. The automatic tension-adjusting wire feeding device according to claim 3, characterized in that, The bellows coupling can be reserved with 50mm of axial compensation space.

5. The automatic tension-adjusting wire feeding device according to claim 3, characterized in that, The coaxiality of the bellows coupling, cable reel, and dynamic torque sensor is less than or equal to Φ0.03mm.

6. The automatic tension-adjusting wire feeding device according to claim 3, characterized in that, The bellows coupling uses multi-layer bellows.

7. The automatic tension-adjusting wire feeding device according to claim 3, characterized in that, The bellows coupling is made of 304 stainless steel or Hastelloy.

8. The automatic tension-adjusting wire feeding device according to claim 1, characterized in that, The wire feeding reel frame shaft is also fitted with a stop block, which is located between the cover plate and the wire feeding reel frame.

9. The automatic tension-adjusting wire feeding device according to claim 8, characterized in that, The stop is an elastic damping body.

10. The automatic tension-adjusting wire feeding device according to claim 1, characterized in that, It also includes a heat dissipation device, the heat dissipation area of ​​which covers the flexible coupling.

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