Variable speed feed device

Abstract

The application discloses a variable-speed feeding device and belongs to the technical field of cable production. The variable-speed feeding device comprises a driving mechanism, a power shaft, a rotating disc, a transmission ring, a lifting mechanism, a transmission clamp roller and a guide mechanism. The transmission ring is in frictional contact with the rotating disc, and the contact point of the transmission ring and the rotating disc is always located in the upper half of the rotating disc. The variable-speed feeding method of the variable-speed feeding device comprises adjusting the lifting height of the lifting mechanism and then controlling the height of the transmission ring on the transmission clamp roller. By changing the up-and-down position of the contact point between the transmission ring and the rotating disc, the linear speed of the transmission ring at different radii of the rotating disc is controlled, variable-speed feeding is realized, and the feeding device can adapt to the needs of cable conveying under different working conditions.

Description

Technical Field

[0001] This invention relates to a variable speed feeding device, belonging to the field of cable production technology. Background Technology

[0002] With the rapid development of modern industry, winding equipment plays a vital role in industries such as wire, cable, and paper. However, traditional winding equipment has gradually revealed a series of technical problems and shortcomings when dealing with the challenges of diverse roll diameters and processing multiple rolls of products simultaneously.

[0003] (1) Single function and manual operation:

[0004] Current winding equipment is typically designed to handle products with a single roll diameter, lacking sufficient flexibility to accommodate rolls of different sizes. Furthermore, manual operation plays a crucial role in the winding process, leading to reduced production efficiency and increased risk of human error.

[0005] (2) Lack of automation and speed regulation functions:

[0006] In existing technologies, the unwinding process of winding equipment typically relies on manual intervention, which is not only inefficient but also prone to operational instability. Furthermore, adjusting the winding speed often requires complex mechanical structures or multi-motor configurations, increasing system complexity and maintenance difficulty.

[0007] (3) Energy waste:

[0008] Traditional winding equipment typically requires multiple motors to perform different functions, which not only increases the cost of the equipment itself but also leads to energy waste. This energy waste is particularly prominent today, given the increasing emphasis on environmental protection and resource conservation.

[0009] (4) Low production efficiency:

[0010] Due to the aforementioned problems, existing winding equipment needs further improvement in terms of production efficiency, energy consumption, and ease of operation in order to meet the ever-evolving industrial demands. Summary of the Invention

[0011] In order to overcome the shortcomings of traditional winding equipment and improve its performance and automation level, the technical solution of this invention proposes an innovative variable speed feeding device, which aims to solve the problems existing in the prior art, thereby achieving more efficient and flexible operation of the winding equipment.

[0012] The technical problem to be solved by this invention is achieved by the following technical solution:

[0013] A variable speed feeding device for automatically unwinding cables includes a drive mechanism, a power shaft, a rotating disc, a transmission ring, a lifting mechanism, transmission clamping rollers, and a guiding mechanism.

[0014] The drive end of the drive mechanism is connected to the power shaft, and a rotating disk is mounted on the power shaft. The drive mechanism drives the power shaft to drive the rotating disk to rotate at a constant angular velocity.

[0015] The lifting mechanism is equipped with a transmission clamping roller for conveying cables, and the rotating disk is vertically arranged with its plane parallel to the lifting direction of the lifting mechanism.

[0016] The lifting mechanism is equipped with a guide mechanism, which is used to guide and limit the cable conveying.

[0017] The transmission ring is fixed on the transmission clamping roller, and the transmission ring is in frictional contact with the rotating disk, and the contact point between the transmission ring and the rotating disk is always located within the upper semicircle of the rotating disk.

[0018] The variable speed feeding method of the variable speed feeding device includes: adjusting the lifting height of the lifting mechanism to control the height of the transmission ring on the transmission clamping roller;

[0019] By changing the vertical position of the contact point between the transmission ring and the rotating disk, the linear velocity of the transmission ring at different radii of the rotating disk can be controlled, thereby achieving variable speed feeding.

[0020] As a preferred example, the lifting mechanism includes a fixed base plate, a lifting plate, a guide shaft, and a linkage mechanism;

[0021] A guide shaft is fixedly connected to the fixed base plate, and a bushing is provided on the lifting plate, with the top of the guide shaft passing through the bushing;

[0022] The linkage mechanism includes at least two hinged rods, with one end of the linkage mechanism hinged to the lifting plate and the other end hinged to the fixed base plate.

[0023] The linkage mechanism is used to withstand the downward pressure and upward force of the cable.

[0024] As a preferred example, a counterweight is fixedly connected to the linkage mechanism, and the counterweight is used to raise the height of the lifting plate.

[0025] As a preferred example, the guiding mechanism includes multiple threaded springs, which are respectively connected to the lifting mechanism. The threaded springs are used for limiting and guiding the cable during transport.

[0026] As a preferred example, the guiding mechanism includes at least one fixed threading spring and at least one movable threading spring. The fixed threading spring is fixed to the lifting plate, and one end of the movable threading spring is used to allow the cable to pass through, while the other end is bent and extends into a pry bar. The pry bar is connected to a linkage mechanism. The movable threading spring bears the downward pressure or upward force of the cable, thereby driving the lifting device, the transmission clamping roller, and the transmission ring to rise and fall.

[0027] As a preferred example, the transmission clamping roller includes an active transmission clamping roller and a passive transmission clamping roller. A transmission ring is fixedly sleeved on the active transmission clamping roller, and a bearing is provided at the bottom of the active transmission clamping roller. The main transmission clamping roller is connected to the lifting mechanism through the bearing.

[0028] As a preferred embodiment, a limiting ring is fixed at the bottom of the active drive clamping roller, a limiting groove is provided in the middle of the limiting ring, and the drive ring is sleeved and fixed in the limiting groove.

[0029] As a preferred example, an adjusting spring is connected between the bottom of the passive drive clamping roller and the lifting plate.

[0030] As a preferred example, the transmission ring is made of rubber or polymer material.

[0031] As a preferred example, the rubber material is any one of chloroprene rubber (NBR), nitrile rubber (BR), and ethylene propylene rubber (EPDM); the polymer material is any one of polyimide (PI), polytetrafluoroethylene (PTFE), and polyethylene (PE).

[0032] The beneficial effects of this invention are:

[0033] The present invention provides a variable speed feeding device for unwinding cables. This device achieves automatic cable unwinding while improving the efficiency and reliability of cable transport through a flexible speed-changing mechanism, adaptability, and stable guiding function. By adjusting the lifting height of the lifting mechanism, the height of the transmission ring on the transmission clamping roller is controlled. By changing the vertical position of the contact point between the transmission ring and the rotating disk, the linear velocity of the transmission ring at different radii of the rotating disk is controlled, thus achieving variable speed feeding. This allows the feeding device to adapt to the needs of cable transport under different working conditions. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the variable speed feeding device in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the overall main structure of the variable speed feeding device in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the overall left-side structure of the variable speed feeding device in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the overall three-dimensional structure of the lifting mechanism in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the overall three-dimensional structure of the transmission clamping roller in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the overall exploded structure of the transmission clamping roller in an embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the overall three-dimensional structure of the movable threaded spring in an embodiment of the present invention.

[0041] In the diagram: 1. Power shaft; 2. Rotating disc; 3. Transmission ring; 4. Active transmission clamping roller; 401. Active roller; 402. Active roller rod; 403. Active bearing; 404. Limiting ring; 405. Limiting groove; 5. Passive transmission clamping roller; 501. Passive roller; 502. Passive roller rod; 503. Passive bearing; 504. Adjusting spring; 505. Connecting rod; 6. Fixed base plate; 7. Lifting plate; 8. Guide shaft; 9. Bushing; 10. Linkage mechanism; 101. Rod body; 11. First fixed threaded spring; 12. Second fixed threaded spring; 13. Movable threaded spring; 131. Pry bar; 14. Counterweight; 15. Cable. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0047] refer to Figures 1-3 This invention provides a variable speed feeding device capable of variable speed unwinding and feeding of a cable 15. In this embodiment, the cable 15 is an electrical wire. The variable speed feeding device includes:

[0048] Drive mechanism (not shown in the figure): As the power source of the entire feeding device, the drive mechanism can be driven by a motor or other drive methods;

[0049] Power shaft 1: Connected to the drive end of the drive mechanism, a rotating disk 2 is fixedly mounted on power shaft 1 via a flange. The drive mechanism drives power shaft 1 to rotate the rotating disk 2 at a constant angular velocity. Linear velocity is the distance traveled by a point on an object along a straight path per unit time, usually represented by v. For the rotating disk 2, there is a relationship between its linear velocity and angular velocity.

[0050] The relationship between linear velocity (v) and angular velocity (ω) can be expressed by the following formula:

[0051] v=r⋅ω

[0052] Where v represents linear velocity, r represents radius, and ω represents angular velocity.

[0053] This relationship shows that on the rotating disk 2, points at different radii have different linear velocities. The linear velocity is proportional to the radius, and with a constant angular velocity, the larger the radius, the greater the linear velocity.

[0054] Driven clamping rollers and rotating disc 2:

[0055] A transmission clamping roller is installed on the lifting mechanism for conveying cable 15.

[0056] Rotating disc 2 is set vertically, and its plane is parallel to the lifting direction of the lifting mechanism.

[0057] Guidance organization:

[0058] The lifting mechanism is equipped with a guide mechanism, the main function of which is to guide and limit the conveying of cable 15. The guide mechanism ensures that cable 15 moves along a prescribed path during the conveying process.

[0059] Drive ring 3 and drive clamping roller:

[0060] The transmission ring 3 is fixed to the transmission clamping roller, and there is frictional contact between the transmission ring 3 and the rotating disk 2. This design is used to realize the transmission and conveying of the cable 15.

[0061] This invention provides a variable speed feeding method:

[0062] The height of the transmission ring 3 on the transmission clamping roller can be controlled by adjusting the lifting height of the lifting mechanism.

[0063] By changing the vertical position of the contact point between the transmission ring 3 and the rotating disk 2, the linear velocity of the transmission ring 3 at different radii of the rotating disk 2 can be controlled.

[0064] Such adjustments and changes achieve the purpose of variable speed feeding, allowing the cable 15 to adjust its speed as needed during the conveying process.

[0065] Contact point location limitation:

[0066] The contact point between the transmission ring 3 and the rotating disk 2 is always located within the upper semicircle of the rotating disk 2. This helps to ensure stable frictional contact and controllable linear velocity changes.

[0067] Overall, the variable speed feeding device achieves controllable speed regulation of the cable 15 conveying speed by adjusting the height of the lifting mechanism and changing the contact point position between the transmission ring 3 and the rotating disk 2.

[0068] Specifically, in this embodiment:

[0069] refer to Figure 4 The components of the lifting mechanism:

[0070] The lifting mechanism includes a fixed base plate 6, a lifting plate 7, a guide shaft 8, and a linkage mechanism 10. These components work together to control the lifting motion.

[0071] Guide shaft 8 and bushing 9:

[0072] Two guide shafts 8 are fixedly connected to the base plate 6, and the tops of the two guide shafts 8 pass through two bushings 9 respectively. This helps to ensure the fixation of the guide shafts 8 and the vertical movement of the lifting plate 7.

[0073] Linkage Mechanism 10:

[0074] The linkage mechanism 10 consists of two hinged rods 101. One end is hinged to the lifting plate 7, and the other end is hinged to the fixed base plate 6. This creates a hinged mechanism between the lifting plate 7 and the fixed base plate 6, which supports and controls the movement of the lifting plate 7.

[0075] Cable 15's load-bearing capacity:

[0076] One of the design purposes of the linkage mechanism 10 is to withstand the downward pressure and upward force of the cable 15. During the lifting process, the linkage mechanism 10 can stably support and transmit the force on the cable 15.

[0077] The lifting mechanism structure controls the lifting plate 7 through the hinge of the guide shaft 8 and the linkage mechanism 10, while effectively withstanding the force of the cable 15.

[0078] This section provides a preferred example of the linkage 10, which includes a counterweight 14 connected to the linkage 10 via a bracket, and the position of the transmission ring 3 is adjusted by adjusting the counterweight.

[0079] Counterweight 14 on linkage mechanism 10:

[0080] A counterweight 14 is fixedly connected to the linkage mechanism 10. The presence of the counterweight 14 can affect the balance and stability of the entire lifting mechanism.

[0081] Counterweight 14 is used to adjust the height of lifting plate 7.

[0082] The counterweight 14 serves to provide balance and stability during the movement of the lifting mechanism. By adjusting the mass or position of the counterweight 14, the height of the lifting plate 7 can be affected.

[0083] Mechanism for adjusting the position of transmission ring 3:

[0084] By adjusting the counterweight forward or backward, the drive ring 3 can be positioned at the center of the radius above the rotating disc 2. This allows for flexible adjustment of the drive ring 3 during lifting and lowering movements, thereby affecting the speed at which the cable 15 is conveyed.

[0085] The height of the lifting plate 7 can be adjusted by adjusting the position or mass of the counterweight 14, and the position of the transmission ring 3 can be affected in this way, thereby realizing the variable speed feeding of the cable 15.

[0086] Specifically, in this embodiment:

[0087] refer to Figure 1 and Figure 2 The guide mechanism is designed to include multiple threading springs for limiting and guiding the cable 15 during transport.

[0088] The guiding mechanism includes multiple threaded springs:

[0089] The guiding mechanism consists of multiple wire-threading springs. The springs are designed to provide guidance and limit the movement of cable 15.

[0090] The threaded springs are connected to the lifting mechanism respectively:

[0091] Each threaded spring is connected to the lifting mechanism. This connection method ensures that the movement of the spring is coordinated with the movement of the lifting mechanism.

[0092] The threading spring is used for limiting and guiding the cable 15 feed:

[0093] The main function of the cable spring is to provide guidance and limiting during the conveying of cable 15. It helps ensure that cable 15 moves along the prescribed path during conveying, preventing deviation or off-tracking.

[0094] This preferred embodiment describes a guide mechanism including two fixed threaded springs (a first fixed threaded spring 11 and a second fixed threaded spring 12, respectively) and a movable threaded spring 13.

[0095] Fixed threading spring:

[0096] Fixed wire springs are fixed to the lifting plate 7, one at the front and one at the back. The springs are connected to the lifting plate 7 by welding, providing a certain degree of fixed guidance.

[0097] refer to Figure 1 and Figure 7 13 movable threading springs:

[0098] The movable threading spring 13 has one end for allowing the cable 15 to pass through, while the other end bends and extends out to form a pry bar 131.

[0099] Crowbar 131 is connected to linkage mechanism 10:

[0100] The lever 131 of the movable wire spring 13 is connected to the linkage mechanism 10, so that the movement of the movable wire spring 13 can affect the entire linkage mechanism 10.

[0101] The movable threading spring 13 withstands the downward or upward force on the cable 15.

[0102] The movable threading spring 13 is designed to withstand the downward or upward force of the cable 15.

[0103] Lifting and lowering of the lifting device, transmission rollers, and transmission ring 3:

[0104] The movement of the movable threaded spring 13 is transmitted to the linkage mechanism 10 via the pry bar 131, which in turn affects the lifting device, the transmission roller, and the transmission ring 3. This design achieves lifting control of the transmission ring 3 through the power (rising or falling) of the cable 15 itself.

[0105] Specifically, in this embodiment:

[0106] refer to Figure 5 and Figure 6 This preferred embodiment describes the design of a drive clamping roller, including an active drive clamping roller and a passive drive clamping roller 5.

[0107] Active drive clamping roller:

[0108] The active drive clamping roller is a component of the drive clamping roller, designed to actively transmit motion or force. In this example, a drive ring 3 is fixedly fitted onto the active drive clamping roller.

[0109] Passive drive clamping roller 5:

[0110] The passive drive clamping roller 5 is another part of the drive clamping roller. The active drive clamping roller receives the driving force from the rotating disk 2 and together with the passive drive clamping roller 5, clamps the conveying cable 15.

[0111] refer to Figure 6 The active drive clamping roller 4 includes an active roller 401, an active roller rod 402, an active bearing 403, a limiting ring 404, and a limiting groove 405.

[0112] The bottom of the active roller 402 is fixedly connected to the lifting plate 7. An active bearing 403 is installed at the upper and lower ends of the active roller 402. An active roller 401 is installed on the outside of the active bearing 403. A limit ring 404 is provided at the bottom of the active roller 401, and a limit groove 405 is provided on the limit ring 404.

[0113] The bottom of the active drive clamping roller 4 is equipped with a bearing, which can reduce the friction between the active drive clamping roller and the lifting mechanism connection, making the transmitted motion smoother.

[0114] The passive drive clamping roller 5 includes a passive roller 501, a passive roller rod 502, a passive bearing 503, an adjusting spring 504, and a connecting rod 505.

[0115] The bottom of the connecting rod 505 is fixedly connected to the lifting plate 7, and an adjusting spring 504 is connected to the top of the connecting rod 505. The upper end of the adjusting spring 504 is fixed to the bottom of the passive roller 502. A passive bearing 503 is installed at the upper and lower ends of the passive roller 502 respectively. A passive roller 501 is installed on the outside of the passive bearing 503. The top of the passive roller 501 and the active roller 401 are at the same horizontal position.

[0116] The adjusting spring 504 has the following functions:

[0117] To accommodate changes in cable 15 diameter: The adjusting spring 504 helps the clamping roller adapt to cables 15 of different diameters. When the diameter of the cable 15 changes, the spring provides a certain degree of elasticity, allowing the clamping roller to adapt to different sizes of cables 15, ensuring that the clamping force is neither too tight nor too loose.

[0118] Shock and vibration mitigation: The springs absorb shocks and vibrations during cable 15 transmission, reducing damage to the clamping rollers and cable 15. This is crucial for improving the stability and reliability of cable 15 transmission.

[0119] In this embodiment, two options are provided for the material selection of the transmission ring 3: rubber material and polymer material.

[0120] The transmission ring 3 is made of rubber or polymer material:

[0121] The materials for the transmission ring 3 include two categories: rubber materials and polymer materials.

[0122] Selection of rubber materials:

[0123] Among the rubber material categories, you can choose any one of chloroprene rubber (NBR), nitrile rubber (BR), or ethylene propylene diene monomer (EPDM). These rubber materials each have different properties, such as oil resistance, abrasion resistance, and weather resistance.

[0124] Selection of polymer materials:

[0125] Among the polymer materials, you can choose any one of polyimide (PI), polytetrafluoroethylene (PTFE), or polyethylene (PE). These polymer materials have different properties, such as high temperature resistance and low coefficient of friction.

[0126] Rubber and polymer materials can better meet the requirements of this invention in terms of friction, wear resistance and durability.

[0127] The beneficial effects of this invention are mainly reflected in the following aspects:

[0128] Automatically adjust cable 15 feeding speed:

[0129] By utilizing the synergistic effect of components such as the movable threading spring 13, the pry bar 131, and the lifting mechanism, this invention enables automatic adjustment of the feeding speed of the cable 15. When the cable 15 falls, the system can quickly respond and adjust the position of relevant components to increase the radius of contact between the transmission ring 3 and the rotating disk 2, thereby increasing the linear speed. Conversely, when the cable 15 rises, the system can also quickly adjust to decrease the radius of contact between the transmission ring 3 and the rotating disk 2, thereby reducing the linear speed. This automatic adjustment effectively addresses changes in the direction of movement of the cable 15.

[0130] Cost without additional equipment:

[0131] The automatic adjustment mechanism of this invention does not require additional equipment such as variable frequency motors. Through the rational design and application of mechanical structures such as springs and levers 131, the system can automatically adjust the feeding speed of the cable 15 without introducing additional costs. This helps reduce the cost of equipment manufacturing and maintenance, and improves the system's economic efficiency.

[0132] Improve cable feeding efficiency:

[0133] By automatically adjusting the feeding speed of cable 15, this invention helps improve the feeding efficiency of cable 15. The system can adjust the position of relevant components in real time according to the movement state of cable 15, ensuring that cable 15 can be fed at the most suitable speed under different conditions. Such intelligent adjustment helps improve production efficiency and the overall performance of the system.

[0134] Overall, this invention achieves automatic adjustment of the feeding speed of cable 15 through ingenious mechanical structure design, thereby improving the intelligence and economy of the system without introducing additional equipment.

[0135] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with the described embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0136] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this invention, "a plurality of" means at least two, such as two or three, unless otherwise explicitly specified.

[0137] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.

Claims

1. A variable speed feed device for automatically paying out a cable, characterized in that, The variable-speed feeding device comprises a driving mechanism, a power shaft, a rotating disc, a transmission ring, a lifting mechanism, a transmission clamp roller and a guide mechanism. The driving end of the driving mechanism is connected with the power shaft, the rotating disc is installed on the power shaft, and the driving mechanism drives the power shaft to drive the rotating disc to rotate at a constant angular velocity. The transmission clamp roller for conveying the cable is arranged on the lifting mechanism, the rotating disc is vertically arranged, and the plane of the rotating disc is parallel to the lifting direction of the lifting mechanism. The guide mechanism is installed on the lifting mechanism and is used for guiding and limiting the cable conveying. The transmission ring is fixed on the transmission clamp roller, and the transmission ring is in frictional contact with the rotating disc, and the contact point between the transmission ring and the rotating disc is always located in the upper half of the rotating disc. The variable-speed feeding method of the variable-speed feeding device comprises the following steps: adjusting the lifting height of the lifting mechanism, and then controlling the height of the transmission ring on the transmission clamp roller. By changing the up-and-down position of the contact point between the transmission ring and the rotating disc, the linear velocity of the transmission ring at different radii of the rotating disc is controlled, and variable-speed feeding is realized. The lifting mechanism comprises a fixed base plate, a lifting plate, a guide shaft and a connecting rod mechanism. The guide shaft is fixedly connected to the fixed base plate, the shaft sleeve is arranged on the lifting plate, and the top of the guide shaft penetrates through the shaft sleeve. The connecting rod mechanism comprises at least two hingedly connected rod bodies, one end of the connecting rod mechanism is hingedly connected to the lifting plate, and the other end of the connecting rod mechanism is hingedly connected to the fixed base plate. The connecting rod mechanism is used for bearing the downward pressure and upward force of the cable. The counterweight is fixedly connected to the connecting rod mechanism and is used for the height of the lifting plate. The guide mechanism comprises a plurality of wire-through springs, the wire-through springs are respectively connected to the lifting mechanism, and the wire-through springs are used for limiting and guiding the cable conveying. The guide mechanism comprises at least one fixed wire-through spring and at least one movable wire-through spring, the fixed wire-through spring is fixed to the lifting plate, one end of the movable wire-through spring is used for allowing the cable to penetrate, the other end of the movable wire-through spring is bent and extends out a pry bar, the pry bar is connected to the connecting rod mechanism, and the movable wire-through spring bears the downward pressure or upward force of the cable, thereby driving the lifting device, the transmission clamp roller and the transmission ring to lift.

2. A variable speed feed device according to claim 1, wherein The transmission clamp roller comprises a driving transmission clamp roller and a driven transmission clamp roller, the transmission ring is sleeved and fixed on the driving transmission clamp roller, and the bottom of the driving transmission clamp roller is provided with a bearing.

3. A variable speed feed device according to claim 2, wherein The bottom of the driving transmission clamp roller is fixedly connected with a limiting ring, and the middle of the limiting ring is provided with a limiting groove.

4. A variable speed feed device according to claim 2, wherein The bottom of the driven transmission clamp roller is connected with the lifting plate through an adjusting spring.

5. A variable speed feed device according to claim 1, wherein The transmission ring is made of rubber material or high polymer material.

6. A variable speed feed device according to claim 5, wherein The rubber material is any one of neoprene rubber (NBR), nitrile rubber (BR) and ethylene propylene rubber (EPDM), and the high polymer material is any one of polyimide (PI), polytetrafluoroethylene (PTFE) and polyethylene (PE).

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