Warp transition device based on screen mounting shaft production

Abstract

The utility model provides a kind of warp transition device based on silk screen hanging shaft production, including rack, material conveying structure, adjusting roller and driving structure.Rack has import end and export end.Material conveying structure is set on rack, with the traction passage that each warp is arranged in serpentine shape.Adjusting roller is set on rack, and it is located at export end.Adjusting roller is arranged for each warp, and it has the first state that each warp is pushed outwards and the second state that the push of warp is cancelled.Driving structure is power connected with adjusting roller.The warp transition device based on silk screen hanging shaft production provided by the utility model realizes the dynamic adaptation of warp length by the state switching of adjusting roller, adapts the weaving of silk screen, and the stable tension control can avoid warp slip or break, reduce production failure, improve wire mesh weaving quality, finally realize the constant control of warp tension in entire weaving process.

Description

Technical Field

[0001] This utility model belongs to the field of metal wire mesh weaving technology, specifically relating to a warp transition device based on wire mesh hanging shaft production. Background Technology

[0002] The process of metal wire mesh weaving involves a bobbin-type production mode, in which several warp threads released from the bobbin frame directly enter the wire mesh weaving machine.

[0003] In existing technologies, to ensure the stability of warp thread transmission, a transitional thread transmission device is typically installed between the bobbin holder and the wire mesh weaving machine. This device is used to organize the warp threads and provide power for their feed. During actual weaving, a "let-before" process is involved. After weaving the previous weft thread, the winding bobbin and warp bobbin are reversed a certain distance (for fine-tuning). When weaving the next weft thread, the force pushing the next weft thread forward will move the previous weft thread forward a little more, resulting in the two weft threads being very close together and perfectly aligned, producing a wire mesh with uniform density and high quality. This can be understood as the warp thread advancing two distances during each weft beating, while before each weft beating, the warp thread retreats one distance. Therefore, the warp thread actually transmits one distance during each weft beating. However, the transitional thread transmission device involves the power for warp thread feed and cannot be reversed. Furthermore, its feed amount must be consistent with the actual transmitted distance. Therefore, this can cause excessive tension in the warp threads during each weft beating, which can accumulate and easily lead to warp thread slippage or breakage. Utility Model Content

[0004] This utility model provides a warp transition device based on wire mesh hanging shaft production, which aims to solve the problem of poor practicality caused by the inability of the transition transmission device to adapt to the laying process in the existing wire mesh hanging shaft production method.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a warp transition device based on wire mesh hanging shaft production, comprising: The frame has an inlet end and an outlet end; The material conveying structure, mounted on the frame, has a traction channel for each warp to be wound in a serpentine pattern; An adjusting roller is mounted on the frame and located at the outlet end; the adjusting roller is wound around each warp and has a first state of pushing each warp outward and a second state of releasing the pushing of the warp. The drive structure is poweredly connected to the regulating roller; Specifically, when each warp thread is reversed, the adjusting roller switches to the first state, pushing each warp thread outward; when the weft thread is inserted, the adjusting roller switches to the second state, working together with the material transfer structure to release each warp thread.

[0006] In one possible implementation, the adjusting roller includes: The power shaft is horizontally positioned and rotatably mounted on the frame; An eccentric roller is sleeved on the power shaft, and the axis of the eccentric roller is parallel to and spaced apart from the axis of the power shaft. The eccentric roller has an outer peripheral surface; in the first state, the outer peripheral surface contacted by each warp is divided into a first curved surface segment; in the second state, the outer peripheral surface contacted by each warp is divided into a second curved surface segment; the first curved surface segment is disposed away from the axis of the power shaft relative to the second curved surface segment.

[0007] In one possible implementation, the driving structure includes: The first reducer is fixed on the frame and its output end is coaxially connected to the power shaft. The first servo motor is fixed on the first reducer and is poweredly connected to the input end of the first reducer.

[0008] In one possible implementation, the material transfer structure includes: The drive roller is rotatably mounted on the frame; The first pressure roller is positioned above the drive roller and rotatably mounted on the frame; the first pressure roller and the drive roller together press the warp threads. The second pressure roller is located horizontally on the side of the drive roller near the exit end and is rotatably mounted on the frame; the second pressure roller and the drive roller together press each warp thread; The guide roller is located above the second pressure roller and is rotatably mounted on the frame; A power unit, mounted on the frame, is used to provide power to the drive roller; The drive roller, the first pressure roller, the second pressure roller, and the guide roller are combined to form the traction channel through which each warp thread passes. Each warp thread, passing through the top of the first pressure roller and wrapped around the first pressure roller, enters between the first pressure roller and the drive roller, then passes around the drive roller and is led out between the second pressure roller and the drive roller to the guide roller.

[0009] In one possible implementation, the drive roller is a rubber roller.

[0010] In one possible implementation, the warp transition device based on wire mesh bobbin production further includes a feeding structure disposed at the inlet end, the feeding structure comprising: A pay-off roller is rotatably mounted on the frame, and the height of the pay-off roller is lower than the height of the first pressure roller. The third pressure roller is located above the pay-off roller and is rotatably mounted on the frame; the third pressure roller and the pay-off roller together press the warp threads together. The warp threads, passing through the top of the third pressure roller and wound around it, enter between the third pressure roller and the pay-off roller, and then pass over the pay-off roller before entering the traction channel.

[0011] In one possible implementation, the feed roller is a rubber roller.

[0012] In one possible implementation, the power component includes: A drive shaft is rotatably mounted on the frame, and a drive gear is provided on the drive shaft. The drive gear meshes with a driven gear provided on the drive roller shaft. The second reducer is fixed on the frame and its output end is coaxially connected to the drive shaft. The second servo motor is fixed on the second reducer and is poweredly connected to the input end of the second reducer.

[0013] The warp transition device based on wire mesh bobbin production provided in this implementation offers advantages over existing technologies. The frame provides a stable mounting base for all components, ensuring that the warp tension is not affected by structural sway during weaving. A material transfer structure on the frame pulls the warp threads exported from the bobbin frame, providing power for their feed and preventing breakage during long-distance traction (using only the wire mesh weaving machine). Simultaneously, the serpentine traction channel of the material transfer structure increases the contact area with the warp threads, ensuring continuous power and stable transport. When the warp threads need to be retracted due to the release process, the drive structure switches the adjusting roller to the first state, pushing the warp threads outwards to maintain constant tension and effectively providing a length allowance for each warp thread. When entering the weft insertion stage, each warp thread is fed forward, and the material conveyor structure simultaneously pulls each warp thread forward. At this time, the adjusting roller switches to the second state to release the jacking action, releasing the reserved allowance. With precise coordination with the material conveyor structure, the warp thread feed is exactly matched to the weft insertion, preventing both excessive feed leading to warp thread slack and insufficient feed leading to warp thread overstretching, thus completely avoiding tension accumulation. The dynamic adaptation of warp thread length is achieved through the switching of the adjusting roller's state. Stable tension control prevents warp thread slippage or breakage, reduces production failures, improves the quality of wire mesh weaving, and ultimately achieves constant control of warp thread tension throughout the entire weaving process. Attached Figure Description

[0014] Figure 1 A cross-sectional structural schematic diagram of the warp transition device based on wire mesh hanging shaft production provided in this embodiment of the utility model; Figure 2 for Figure 1 An enlarged structural diagram of the warp transition device based on wire mesh hanging shaft production provided in the embodiment (the realized part represents the first state A, and the dashed part represents the second state B). Figure 3 This is a side view of the warp transition device based on wire mesh hanging shaft production provided in an embodiment of the present utility model.

[0015] Explanation of reference numerals in the attached figures: 10. Rack; 20. Material conveying structure; 21. Drive roller; 22. First pressure roller; 23. Second pressure roller; 24. Guide roller; 25. Power component; 251. Drive shaft; 252. Second reducer; 253. Second servo motor; 30. Adjusting roller; 31. Drive shaft; 32. Eccentric roller; 40. Drive structure; 41. First reducer; 42. First servo motor; 50. Feeding structure; 51. Feeding roller; 52. Third pressure roller; A. First state; B. Second state. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Please refer to the following: Figure 1 and Figure 2 The warp transition device based on wire mesh bobbin production provided by this utility model will now be described. The warp transition device based on wire mesh bobbin production includes a frame 10, a material transfer structure 20, an adjusting roller 30, and a drive structure 40. The frame 10 has an inlet end and an outlet end. The material transfer structure 20 is mounted on the frame 10 and has a traction channel for each warp thread to be wound in a serpentine pattern. The adjusting roller 30 is mounted on the frame 10 and located at the outlet end. The adjusting roller 30 is used for winding each warp thread and has a first state of pushing each warp thread outwards and a second state of releasing the pushing action on the warp thread. The drive structure 40 is poweredly connected to the adjusting roller 30.

[0018] During the backward movement of each warp thread, the adjusting roller 30 switches to the first state, pushing each warp thread outward. During the weft insertion, the adjusting roller 30 switches to the second state, working in conjunction with the material transfer structure 20 to release each warp thread.

[0019] The warp transition device based on wire mesh bobbin production provided in this embodiment, compared with the prior art, provides a stable mounting foundation for each component with the frame 10, ensuring that the warp tension is not affected by structural swaying during the weaving process. A material transfer structure 20 is provided on the frame 10, which can pull the warp threads led out from the bobbin frame, providing power for the feeding of each warp thread and preventing breakage due to long-distance traction of the warp threads (only through the wire mesh weaving machine). Simultaneously, the material transfer structure 20 increases the contact area with the warp threads through a serpentine traction channel, thereby ensuring continuous power for each warp thread and stable conveying. When the warp threads need to be retracted due to the release process, the drive structure 40 drives the adjusting roller 30 to switch to the first state, pushing the warp threads outwards to ensure constant tension of each warp thread, while also reserving a length allowance for each warp thread. When entering the weft insertion stage, each warp thread is fed forward, and the material conveyor structure 20 simultaneously pulls each warp thread forward. At this time, the adjusting roller 30 switches to the second state to release the push-pull mechanism, releasing the reserved allowance. With precise coordination with the material conveyor structure 20, the warp thread feed is just right for weft insertion, preventing both excessive feed leading to warp thread slack and insufficient feed leading to excessive stretching, thus completely avoiding tension accumulation. By switching the state of the adjusting roller 30, the warp thread length is dynamically adapted, and stable tension control prevents warp thread slippage or breakage, reduces production failures, improves the quality of wire mesh weaving, and ultimately achieves constant control of warp thread tension throughout the entire weaving process.

[0020] In some embodiments, the adjusting roller 30 may be as follows: Figure 2 The structure shown. See also Figure 2 The adjusting roller 30 includes a power shaft 31 and an eccentric roller 32. The power shaft 31 is horizontally positioned and rotatably mounted on the frame 10. The eccentric roller 32 is sleeved on the power shaft 31, and the axis of the eccentric roller 32 is parallel to and spaced apart from the axis of the power shaft 31.

[0021] The eccentric roller 32 has an outer peripheral surface. In the first state, the outer peripheral surface contacted by each warp is divided into a first curved surface segment. In the second state, the outer peripheral surface contacted by each warp is divided into a second curved surface segment. The first curved surface segment is positioned away from the axis of the drive shaft 31 relative to the second curved surface segment.

[0022] The eccentric structure formed by the combination of the drive shaft 31 and the eccentric roller 32, through a fixed geometric design, ensures that the warp lifting length is preset and consistent with each lifting operation. Specifically, as the drive shaft 31 rotates, the contact position between the outer circumference of the eccentric roller 32 and the warp changes regularly. In the first state, the first curved section away from the axis of the drive shaft 31 contacts the warp, and the lifting amplitude is precisely determined by the eccentricity (distance between the two axes), ensuring that the length allowance obtained by each warp perfectly matches the reversal requirements of the laying process, preventing uneven stress on multiple warps due to differences in lifting amplitude. In the second state, the second curved section closer to the axis contacts the warp, smoothly transitioning the lifting process and avoiding sudden changes in warp stress caused by abrupt changes in the contact surface, further ensuring tension stability.

[0023] Furthermore, this structure allows for state switching simply by rotating the power shaft 31, resulting in a simpler structure, more reliable operation, and further enhanced stability with constant tension. It also elevates tension control precision to a new level, ensuring that the tension of each warp remains consistent even when weaving multiple warp threads in batches, completely avoiding mesh quality defects caused by insufficient adjustment precision.

[0024] In some embodiments, the driving structure 40 described above may adopt the following... Figure 3 The structure shown. See also Figure 3 The drive structure 40 includes a first reducer 41 and a first servo motor 42. The first reducer 41 is fixed on the frame 10, and its output end is coaxially connected to the power shaft 31. The first servo motor 42 is fixed on the first reducer 41 and is poweredly connected to the input end of the first reducer 41.

[0025] The servo motor boasts millisecond-level response speed and extremely high speed control precision, enabling it to adjust the rotation angle of the power shaft 31 in real time according to the weaving rhythm. During warp retraction, it can precisely control the power shaft 31 to rotate to the position where it lifts the warp in the first curved section; during weft insertion, it can precisely rotate to the second curved section to release the lifting action, ensuring complete synchronization between state switching and process rhythm, and avoiding abnormal tension caused by lag in movement. Meanwhile, the first reducer 41 reduces the speed and increases the torque, making the rotation of the power shaft 31 smoother, preventing excessive abrupt movement of the adjusting roller 30 caused by direct high-speed drive of the servo motor, and avoiding sudden tension increases or decreases due to sudden lifting or releasing, further ensuring constant tension.

[0026] In some embodiments, the material transfer structure 20 described above can be adopted as follows: Figure 1 The structure shown. See also Figure 1The material transfer structure 20 includes a drive roller 21, a first pressure roller 22, a second pressure roller 23, a guide roller 24, and a power unit 25. The drive roller 21 is rotatably mounted on the frame 10. The first pressure roller 22 is positioned above the drive roller 21 and is rotatably mounted on the frame 10. The first pressure roller 22 and the drive roller 21 together press the warp threads. The second pressure roller 23 is located horizontally on the side of the drive roller 21 near the exit end and is rotatably mounted on the frame 10. The second pressure roller 23 and the drive roller 21 together press the warp threads. The guide roller 24 is located above the second pressure roller 23 and is rotatably mounted on the frame 10. The power unit 25 is mounted on the frame 10 and provides power to the drive roller 21.

[0027] The warp yarn first wraps around the top of the first pressure roller 22, enters between the first pressure roller 22 and the drive roller 21, then wraps around the drive roller 21 again, and enters between the second pressure roller 23 and the drive roller 21, finally exiting through the guide roller 24. Along this path, the warp yarn forms close contact with the drive roller 21, the first pressure roller 22, and the second pressure roller 23, significantly increasing friction and completely preventing slippage, ensuring that the warp yarn feed is completely consistent with the theoretical feed driven by the power component 25. Simultaneously, the first pressure roller 22 and the second pressure roller 23 press the warp yarn from different positions, preventing lateral deviation during feeding and ensuring that the feed paths of multiple warp yarns are parallel and uniform, avoiding the problem of some warp yarns being under excessive force and others under excessive force due to warp yarn deviation. The guide roller 24 guides the warp yarn precisely to the adjusting roller 30 at the exit end, preventing the warp yarns from tangling or rubbing against the frame 10, reducing tension loss, and ensuring that the warp yarn is still in a stable initial tension state when it reaches the adjusting roller 30.

[0028] During weft insertion, the amount of warp yarn released by the material transfer structure 20 is perfectly matched with the amount of warp yarn released by the adjusting roller 30 when it is released from its pushing action. When the warp yarn is reversed, although the material transfer structure 20 cannot reverse, the action of the adjusting roller 30 lifting the warp yarn can completely offset the stretching demand caused by the reversal. With the cooperation of both, the warp yarn tension is always in closed-loop control, and there will be no disconnection of any link that causes tension fluctuations. This significantly improves the stability and reliability of the device and ensures that the weaving quality of the wire mesh is always consistent in large-scale production.

[0029] Additionally, both the first pressure roller 22 and the second pressure roller 23 can be configured as movable structures; see [link to relevant documentation]. Figure 1 The movable connection structure of the pressure roller is well known to those skilled in the art and will not be described in detail here.

[0030] In some embodiments, the drive roller 21 may be as follows: Figure 1 The structure shown. See also Figure 1 The drive roller 21 is a rubber roller, which may include a metal mandrel and a rubber roller covering the metal mandrel.

[0031] The rubber roller surface possesses excellent elasticity, enabling flexible contact with the warp yarns. Even with slight fluctuations in warp diameter or surface unevenness, the elastic surface adapts automatically, ensuring consistent contact area and stable friction, completely preventing slippage and guaranteeing precise warp feed. The rubber roller's coefficient of friction is significantly higher than that of metal rollers, achieving sufficient friction without excessive pressure. This reduces pressure damage to the warp yarns and further lowers the risk of slippage. The flexible contact buffers minor impacts during warp feeding, preventing sudden changes in warp force caused by slight fluctuations in the drive roller's speed, resulting in smoother tension changes. It also prevents damage during warp compression by the pressure rollers.

[0032] In some embodiments, see Figure 1 The warp transition device based on wire mesh hanging shaft production also includes a feeding structure 50, which is located at the inlet end. The feeding structure 50 includes a pay-off roller 51 and a third pressure roller 52. The pay-off roller 51 is rotatably mounted on the frame 10, and its height is lower than that of the first pressure roller 22. The third pressure roller 52 is located above the pay-off roller 51 and is rotatably mounted on the frame 10. The third pressure roller 52 and the pay-off roller 51 together press the warp threads.

[0033] Specifically, the warp threads that pass through the top of the third pressure roller 52 and are wound around the third pressure roller 52 enter between the third pressure roller 52 and the pay-off roller 51, and then enter the traction channel after passing around the pay-off roller 51.

[0034] The height of the pay-off roller 51 is lower than that of the first pressure roller 22, allowing the warp yarn to enter the feed structure 20 via a slightly upward path after being led out from the pay-off roller 51. This height difference provides initial slight tension to the warp yarn, preventing it from slacking and ensuring that the initial tension of each warp yarn entering the feed structure 20 is consistent. The third pressure roller 52, together with the pay-off roller 51, presses the warp yarn firmly, preventing slippage during the pay-off process and ensuring that the amount of warp yarn released from the bobbin holder perfectly matches the amount entering the feed structure 20, thus avoiding subsequent feed deviations caused by fluctuations in the pay-off amount.

[0035] In some embodiments, the above-mentioned pay-off roller 51 may be as follows: Figure 1 The structure shown. See also Figure 1 The wire feeding roller 51 is a rubber roller, which may include a metal mandrel and a rubber roller covering the metal mandrel.

[0036] The rubber roller surface possesses excellent elasticity, enabling flexible contact with the warp yarns. Even with slight fluctuations in warp diameter or surface unevenness, the elastic surface adapts automatically, ensuring consistent contact area and stable friction, completely preventing slippage and guaranteeing precise warp feed. The rubber roller's coefficient of friction is significantly higher than that of metal rollers, achieving sufficient friction without excessive pressure. This reduces pressure damage to the warp yarns and further lowers the risk of slippage. The flexible contact buffers minor impacts during warp feeding, preventing sudden changes in warp force caused by slight fluctuations in the drive roller 21's rotational speed, resulting in smoother tension changes. It also prevents damage when the third pressure roller 52 presses down on the warp yarns.

[0037] Additionally, regarding the third pressure roller 52, it can be configured as a movable structure; see [link to relevant documentation]. Figure 1 The movable connection structure of the pressure roller is well known to those skilled in the art and will not be described in detail here.

[0038] In some embodiments, the power component 25 may be adopted as follows: Figure 1 and Figure 3 The structure shown. See also Figure 1 and Figure 3 The power unit 25 includes a drive shaft 251, a second reducer 252, and a second servo motor 253. The drive shaft 251 is rotatably mounted on the frame 10 and has a drive gear that meshes with a driven gear mounted on the shaft of the drive roller 21. The second reducer 252 is fixed to the frame 10, and its output end is coaxially connected to the drive shaft 251. The second servo motor 253 is fixed to the second reducer 252 and is poweredly connected to the input end of the second reducer 252.

[0039] The precise meshing of the driving and driven gears ensures high transmission efficiency and eliminates slippage. The rotational speed of the drive roller 21 perfectly follows the rotational speed of the drive shaft 251, resulting in stable output and precise controllable warp feed. Simultaneously, the minimal gear backlash prevents jerking during transmission, ensuring smooth warp feed and gradual tension changes. Furthermore, the combination of the second servo motor 253 and the second reducer 252 provides high-precision speed control for the drive shaft 251: the second servo motor 253 adjusts its speed in real time according to the requirements of the weft insertion process (such as different weft insertion speeds), ensuring that the feed amount of the drive roller 21 precisely matches the required weft insertion distance. The second reducer 252 reduces the rotational speed and increases the torque, making the rotation of the drive shaft 251 smoother and avoiding gear meshing impact caused by direct high-speed drive of the servo motor, further improving transmission stability.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A warp transition device based on wire mesh bobbin production, disposed between the bobbin holder and the wire mesh weaving machine; characterized in that, include: The frame has an inlet end and an outlet end; The material conveying structure, mounted on the frame, has a traction channel for each warp to be wound in a serpentine pattern; An adjusting roller is mounted on the frame and located at the outlet end; the adjusting roller is wound around each warp and has a first state of pushing each warp outward and a second state of releasing the pushing of the warp. The drive structure is poweredly connected to the regulating roller; Specifically, when each warp thread is reversed, the adjusting roller switches to the first state, pushing each warp thread outward; when the weft thread is inserted, the adjusting roller switches to the second state, working together with the material transfer structure to release each warp thread.

2. The warp transition device based on wire mesh hanging shaft production as described in claim 1, characterized in that, The adjusting roller includes: The power shaft is horizontally positioned and rotatably mounted on the frame; An eccentric roller is sleeved on the power shaft, and the axis of the eccentric roller is parallel to and spaced apart from the axis of the power shaft. The eccentric roller has an outer peripheral surface; in the first state, the outer peripheral surface contacted by each warp is divided into a first curved surface segment; in the second state, the outer peripheral surface contacted by each warp is divided into a second curved surface segment; the first curved surface segment is disposed away from the axis of the power shaft relative to the second curved surface segment.

3. The warp transition device based on wire mesh hanging shaft production as described in claim 2, characterized in that, The driving structure includes: The first reducer is fixed on the frame and its output end is coaxially connected to the power shaft. The first servo motor is fixed on the first reducer and is poweredly connected to the input end of the first reducer.

4. The warp transition device based on wire mesh hanging shaft production as described in any one of claims 1-3, characterized in that, The material transfer structure includes: The drive roller is rotatably mounted on the frame; The first pressure roller is positioned above the drive roller and rotatably mounted on the frame; the first pressure roller and the drive roller together press the warp threads. The second pressure roller is located horizontally on the side of the drive roller near the exit end and is rotatably mounted on the frame; the second pressure roller and the drive roller together press each warp thread; The guide roller is located above the second pressure roller and is rotatably mounted on the frame; A power unit, mounted on the frame, is used to provide power to the drive roller; The drive roller, the first pressure roller, the second pressure roller, and the guide roller are combined to form the traction channel through which each warp thread passes. Each warp thread, passing through the top of the first pressure roller and wrapped around the first pressure roller, enters between the first pressure roller and the drive roller, then passes around the drive roller and is led out between the second pressure roller and the drive roller to the guide roller.

5. The warp transition device based on wire mesh hanging shaft production as described in claim 4, characterized in that, The drive roller is a rubber roller.

6. The warp transition device based on wire mesh hanging shaft production as described in claim 4, characterized in that, The warp transition device based on wire mesh hanging shaft production further includes a feeding structure, which is disposed at the inlet end. The feeding structure includes: A pay-off roller is rotatably mounted on the frame, and the height of the pay-off roller is lower than the height of the first pressure roller. The third pressure roller is located above the pay-off roller and is rotatably mounted on the frame; the third pressure roller and the pay-off roller together press the warp threads together. The warp threads, passing through the top of the third pressure roller and wound around it, enter between the third pressure roller and the pay-off roller, and then pass over the pay-off roller before entering the traction channel.

7. The warp transition device based on wire mesh hanging shaft production as described in claim 6, characterized in that, The pay-off roller is a rubber roller.

8. The warp transition device based on wire mesh hanging shaft production as described in claim 4, characterized in that, The power component includes: A drive shaft is rotatably mounted on the frame, and a drive gear is provided on the drive shaft. The drive gear meshes with a driven gear provided on the drive roller shaft. The second reducer is fixed on the frame and its output end is coaxially connected to the drive shaft. The second servo motor is fixed on the second reducer and is poweredly connected to the input end of the second reducer.

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