Textile fabric conveying device for spinning

Abstract

The invention discloses a textile fabric conveying device for textile, and belongs to the technical field of textile, the textile fabric conveying device comprises two connecting plates, a rotating roller is rotatably connected between the two connecting plates, a winding roller is arranged between the two connecting plates, and the rotating roller and the winding roller are located on the two sides of the connecting plates; two limiting assemblies are arranged on the outer surfaces, close to each other, of the two connecting plates, adjusting assemblies are arranged on the outer sides of the two connecting plates, and a tensioning adjusting assembly is arranged between the two connecting plates. The device can automatically adjust the position of the limiting wheel according to the thickness and the material of the textile fabric, the stability and the flatness of the fabric in the conveying process are ensured through an automatic adjusting mechanism, and the conveying problem such as wrinkles or deviation caused by the uneven thickness or the material difference of the fabric is effectively avoided.

Description

Technical Field

[0001] The invention relates to the field of textile technology, and more particularly to a textile fabric conveying device for textile use. Background Art

[0002] Textile fabrics are materials made by processing fibers into yarns through textile technology, and then processing the yarns through various weaving technologies (such as weaving or knitting). These materials are widely used in many fields such as clothing, home decoration and industry. The basic components of textile fabrics are fibers, which can be natural fibers such as cotton, linen, silk, wool, etc., or chemical fibers such as polyester fiber (polyester), nylon (nylon), polyacrylonitrile fiber (acrylic fiber), polyvinyl chloride fiber (chlorofiber), polyvinyl formal fiber (vinylon) and polypropylene fiber (polypropylene fiber). As an important basic material for clothing, home decoration and industrial applications, every step in the production and processing of textile fabrics is crucial. Especially in the transmission link of textile fabrics, efficient, stable and accurate transmission devices have a decisive influence on ensuring the quality and production efficiency of fabrics.

[0003] The publication number is CN108328393A, which discloses an alarm device for textile fabric transmission, including a first support plate, a slide bar, a rotating shaft, a mounting plate and a second support plate, the first support plate and the second support plate are welded with a support seat on the lower surface, the first support plate and the second support plate are provided with a slide groove on one side, the lower end of the first support plate and the second support plate is installed with a bottom plate, a hydraulic pressure is installed on the upper surface of the bottom plate, a hydraulic telescopic rod is installed on the hydraulic pressure, and the upper surface of the hydraulic telescopic rod is installed on the lower surface of both ends of the slide bar, the two ends of the slide bar are movably inserted in the slide groove, the middle position of the slide bar is rotatably installed with a rubber roller shaft, the rotating shaft is rotatably installed on the upper end of the first support plate and the upper end of the second support plate, one end of the rotating shaft is installed with a driven rotating shaft, a reduction motor is installed on the upper surface of the mounting plate, mounting rods are symmetrically installed on both sides of the upper surface of the bottom plate, and infrared transmitters and infrared receivers are installed on the mounting rods. The fabric is flattened, and deviation is discovered in time to avoid losses.

[0004] Although the device has many beneficial effects, the following problems still exist: although the alarm device for textile fabric transmission can flatten the fabric and detect deviation in time to avoid loss, traditional textile fabrics cannot automatically adjust the transmission tension according to the thickness and material of the fabric during transmission, which causes the fabric to wrinkle or stretch during transmission. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a textile fabric conveying device for weaving, which solves the above-mentioned problems.

[0006] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a textile fabric conveying device for textile use, a textile fabric conveying device for textile use, comprising two connecting plates, a rotating roller is rotatably connected between the two connecting plates, a winding roller is arranged between the two connecting plates, the rotating roller and the winding roller are located on both sides of the connecting plates, two limit assemblies are arranged on the outer surfaces of the two connecting plates close to each other, an adjustment assembly is arranged on the outer sides of the two connecting plates, a tension adjustment assembly is arranged between the two connecting plates, and further comprising: The limiting assembly includes a fixed seat, a movable seat and a limiting wheel. The outer surfaces of the two connecting plates close to each other are fixedly connected to two symmetrically distributed fixed seats. A movable seat is arranged above the four fixed seats. The outer surfaces of the fixed seats and the movable seats are rotatably connected to the limiting wheel. The adjustment assembly includes a first pulley, a first belt, a moving block and a transfer block, the inside of the two connecting plates are provided with a moving block, the two moving blocks are rotatably connected to the winding roller, the outer sides of the two moving blocks are fixedly connected with a transfer block, the outer surface of one of the transfer blocks and the connecting plate are rotatably connected with the first pulley, and the outer surfaces of the two first pulleys are sleeved with the first belt; The tensioning adjustment assembly includes a connecting frame, a pressure roller and a transmission roller. The outer surfaces of the two connecting plates that are close to each other are fixedly connected to the connecting frame. A pressure roller is provided between the two connecting frames. Two transmission rollers are rotatably connected between the two connecting frames, and the pressure roller is located directly above the two transmission rollers.

[0007] Preferably, the limiting assembly further includes a spring and a screw, the fixed seat is internally rotatably connected with the screw, the screw is fixedly sleeved with the movable seat, the outer surface of the screw is elastically connected with a spring, and the spring is located above the movable seat.

[0008] Preferably, the adjustment assembly also includes a first threaded rod, a second pulley and a second belt, a fixing frame is fixedly connected between the two connecting plates, the outer surface of the fixing frame is rotatably connected to two second pulleys, a second belt is sleeved between the two second pulleys, two first threaded rods are rotatably connected between the connecting plate and the fixing frame, and the two second pulleys are fixedly connected to the corresponding first threaded rods.

[0009] Preferably, two first guide rails are fixedly connected inside the two connecting plates, the two first guide rails are slidably connected to corresponding moving blocks, and the two moving blocks are fixedly connected to corresponding first threaded rods.

[0010] Preferably, a first motor is fixedly mounted on the outer surface of another of the adapter blocks, and an output end of the first motor is fixedly connected to the winding roller.

[0011] Preferably, a handle is rotatably connected to the outer surface of the fixing frame, and the handle is fixedly connected to a second pulley adjacent thereto.

[0012] Preferably, the tensioning adjustment assembly further includes a second motor, a chain and a sprocket, the outer surface of the connecting plate is rotatably connected to two sprockets, a chain is meshedly connected between the two sprockets, and the two sprockets are fixedly connected to corresponding transmission rollers.

[0013] Preferably, a mounting bracket is fixedly connected to the outer surface of the connecting plate, a second motor is fixedly mounted on the outer surface of the mounting bracket, and an output end of the second motor is fixedly connected to a nearby sprocket.

[0014] Preferably, two symmetrically distributed second guide rails are fixedly connected inside the two connecting frames, a sliding block is slidably connected between the two second guide rails, the two sliding blocks are rotatably connected to the pressure rollers, and the tops of the two connecting frames are rotatably connected to second threaded rods, and the two second threaded rods are fixedly connected to the corresponding sliding blocks.

[0015] Preferably, a third motor is fixedly mounted on the outer surface of one of the connecting frames, and an output end of the third motor is fixedly connected to a neighboring transmission roller.

[0016] (III) Beneficial effects Compared with the prior art, the present invention provides a textile fabric conveying device for weaving, which has the following beneficial effects: 1. A textile fabric conveying device for textile use, through the designed limiting assembly, especially the combination of the movable seat and the screw and the elastic connection of the spring, the device can automatically adjust the position of the limiting wheel according to the thickness and material of the textile fabric. The automatic adjustment mechanism ensures the stability and flatness of the fabric during the conveying process, and effectively avoids conveying problems caused by uneven fabric thickness or material differences, such as wrinkles or offsets.

[0017] 2. This textile fabric conveying device for textile use, through the ingenious design of the first threaded rod, the second pulley and the second belt in the adjustment component, allows the staff to easily and accurately adjust the position of the winding roller through simple handle operation, which not only improves the adaptability and flexibility of the device, but also ensures the uniformity and tightness of the fabric during the winding process, and further reduces the risk of fabric stretching and deformation.

[0018] 3. This textile fabric conveying device for textile use provides intelligent and adjustable tensioning force for the fabric through a tensioning adjustment component, especially a combination of a pressure roller and a transmission roller, and a sprocket and chain system driven by a second motor. By starting the second motor, the tension can be adjusted in real time according to the material of the fabric and the conveying speed, thereby effectively avoiding wrinkles or stretching deformation of the fabric caused by uneven tension during the conveying process. The adjustment function of the second threaded rod also allows the staff to fine-tune the height of the pressure roller according to specific needs, further enhancing the accuracy and flexibility of the tension adjustment.

[0019] 4. A textile fabric conveying device for textile use provides additional power to one of the transmission rollers by adding a third motor, which not only helps the smooth transmission of the fabric in the device, but also improves the overall transmission efficiency. Especially when dealing with thick or high friction coefficient fabrics, this auxiliary transmission mechanism can significantly reduce the resistance and energy consumption during the transmission process.

[0020] 5. This textile fabric conveying device for textile use has a reasonable and compact structural design and stable and reliable connections between various components. Workers can easily perform daily operations and maintenance work, such as adjusting the position of the limiting wheel, adjusting the position of the winding roller, and cleaning the transmission components, which not only improves work efficiency but also helps to extend the service life of the device.

[0021] 6. This textile fabric conveying device allows the staff to flexibly adjust the position of the winding roller according to the width of the fabric and the conveying requirements through the adjustment component, so that the device can be suitable for conveying fabrics of different specifications. The movable seat and spring design in the limiting component enable the device to adapt to fabrics of different thicknesses and materials, thereby enhancing the versatility and adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A magnified view of the structure at center; Figure 3 For the present invention Figure 1 A magnified view of the structure at B in the middle; Figure 4 For the present invention Figure 1 A magnified view of the structure at C in the middle; Figure 5 It is a side view of the structure of the present invention; Figure 6 It is a schematic diagram of the chain structure of the present invention; Figure 7 This is a schematic diagram of the structure of the second pulley of the present invention; Figure 8 This is a schematic diagram of the third motor structure of the present invention.

[0023] In the figure: 1. connecting plate; 2. rotating roller; 3. winding roller; 4. limiting assembly; 401. fixed seat; 402. movable seat; 403. spring; 404. limiting wheel; 405. screw; 5. adjusting assembly; 501. handle; 502. first guide rail; 503. first pulley; 504. first belt; 505. first threaded rod; 506. moving block; 507. adapter block; 508. first motor; 509. second pulley; 510. second belt; 6. tensioning adjustment assembly; 601. second threaded rod; 602. connecting frame; 603. pressure roller; 604. transmission roller; 605. sliding block; 606. second motor; 607. chain; 608. sprocket; 609. second guide rail; 610. third motor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-8 , the present invention provides a technical solution: A textile fabric conveying device for textile use, comprising two connecting plates 1, a rotating roller 2 is rotatably connected between the two connecting plates 1, a winding roller 3 is arranged between the two connecting plates 1, the rotating roller 2 and the winding roller 3 are located on both sides of the connecting plates 1, two limit assemblies 4 are arranged on the outer surfaces of the two connecting plates 1 that are close to each other, an adjustment assembly 5 is arranged on the outer sides of the two connecting plates 1, a tension adjustment assembly 6 is arranged between the two connecting plates 1, and further comprising: The limiting assembly 4 includes a fixed seat 401, a movable seat 402 and a limiting wheel 404. The outer surfaces of the two connecting plates 1 close to each other are fixedly connected to two symmetrically distributed fixed seats 401. A movable seat 402 is arranged above the four fixed seats 401. The outer surfaces of the fixed seats 401 and the movable seats 402 are rotatably connected to the limiting wheels 404. The adjustment assembly 5 includes a first pulley 503, a first belt 504, a moving block 506 and a transfer block 507. The moving blocks 506 are arranged inside the two connecting plates 1. The two moving blocks 506 are rotatably connected to the winding roller 3. The outer sides of the two moving blocks 506 are fixedly connected to the transfer blocks 507. The outer surface of one of the transfer blocks 507 and the connecting plate 1 is rotatably connected to the first pulley 503. The outer surfaces of the two first pulleys 503 are sleeved with the first belts 504. The tensioning adjustment assembly 6 includes a connecting frame 602, a pressure roller 603 and a transmission roller 604. The outer surfaces of the two connecting plates 1 that are close to each other are fixedly connected with the connecting frame 602. A pressure roller 603 is provided between the two connecting frames 602. Two transmission rollers 604 are rotatably connected between the two connecting frames 602. The pressure roller 603 is located directly above the two transmission rollers 604. In the initial state, the fixed seat 401 and the movable seat 402 both limit the textile fabric through the limiting wheel 404 to ensure stable transmission of the fabric between the rotating roller 2 and the winding roller 3.

[0026] Furthermore, the limiting assembly 4 also includes a spring 403 and a screw 405. The fixed seat 401 is internally rotatably connected to the screw 405, and the screw 405 is fixedly sleeved with the movable seat 402. The outer surface of the screw 405 is elastically connected to the spring 403. The spring 403 is located above the movable seat 402. The spring 403 provides an elastic connection on the outer surface of the screw 405 to ensure that the movable seat 402 has a certain buffer and stability when moving.

[0027] Furthermore, the adjustment assembly 5 also includes a first threaded rod 505, a second pulley 509 and a second belt 510. A fixing frame is fixedly connected between the two connecting plates 1. The outer surface of the fixing frame is rotatably connected to two second pulleys 509. A second belt 510 is sleeved between the two second pulleys 509. Two first threaded rods 505 are rotatably connected between the connecting plate 1 and the fixing frame. The two second pulleys 509 are fixedly connected to the corresponding first threaded rods 505, driving the two first threaded rods 505 to rotate. The moving block 506 is fixedly connected to the first threaded rod 505.

[0028] Furthermore, two first guide rails 502 are fixedly connected inside the two connecting plates 1, and the two first guide rails 502 are slidably connected with corresponding moving blocks 506. The two moving blocks 506 are fixedly connected with the corresponding first threaded rods 505, thereby driving the two first threaded rods 505 to rotate. Since the moving blocks 506 are fixedly connected to the first threaded rods 505, the rotation of the first threaded rods 505 will drive the moving blocks 506 to slide on the first guide rails 502, thereby adjusting the position of the winding roller 3.

[0029] Furthermore, a first motor 508 is fixedly mounted on the outer surface of another adapter block 507 , and an output end of the first motor 508 is fixedly connected to the winding roller 3 . When the first motor 508 is started, its output end drives the winding roller 3 to rotate.

[0030] Furthermore, a handle 501 is rotatably connected to the outer surface of the fixing frame, and the handle 501 is fixedly connected to a second belt pulley 509 adjacent thereto, and the second belt pulley 509 is rotated by the handle 501 .

[0031] Furthermore, the tensioning adjustment assembly 6 also includes a second motor 606, a chain 607 and a sprocket 608. The outer surface of the connecting plate 1 is rotatably connected to two sprockets 608, and the chain 607 is meshed between the two sprockets 608. The two sprockets 608 are fixedly connected to the corresponding transmission rollers 604. The chain 607 transmits power to the other sprocket 608, thereby driving the two transmission rollers 604 to rotate.

[0032] Furthermore, a mounting frame is fixedly connected to the outer surface of the connecting plate 1, and a second motor 606 is fixedly installed on the outer surface of the mounting frame. The output end of the second motor 606 is fixedly connected to a nearby sprocket 608. When the second motor 606 is started, its output end drives the sprocket 608 to rotate, and the chain 607 transmits power to another sprocket 608, thereby driving the two transmission rollers 604 to rotate. Since the transmission rollers 604 are in contact with the fabric, their rotation will adjust the tension of the fabric.

[0033] Furthermore, two symmetrically distributed second guide rails 609 are fixedly connected inside the two connecting frames 602, and a sliding block 605 is slidably connected between the two second guide rails 609. The two sliding blocks 605 are rotatably connected to the pressure roller 603. The tops of the two connecting frames 602 are rotatably connected to the second threaded rods 601, and the two second threaded rods 601 are fixedly connected to the corresponding sliding blocks 605. By adjusting the second threaded rods 601, the height of the pressure roller 603 can be changed, and the tension of the fabric can be further fine-tuned.

[0034] Furthermore, a third motor 610 is fixedly installed on the outer surface of one of the connecting frames 602, and the output end of the third motor 610 is fixedly connected to a nearby transmission roller 604. First, the third motor 610 is started, and the output end of the third motor 610 drives the transmission roller 604 connected thereto to rotate. Due to the friction between the two transmission rollers 604 and between them and the fabric, the fabric is smoothly introduced into and passes through the device.

[0035] Working principle: When the staff needs to use the textile fabric conveying device for textile use, in the initial state, the fixed seat 401 and the movable seat 402 both limit the textile fabric through the limiting wheel 404 to ensure the stable transmission of the fabric between the rotating roller 2 and the winding roller 3. When it is necessary to start the device to convey the fabric, the third motor 610 is first started, and the output end of the third motor 610 drives the transmission roller 604 connected to it to rotate. Due to the friction between the two transmission rollers 604 and between them and the fabric, the fabric is smoothly introduced into and passes through the device. During the transmission process, the fabric is guided and limited by the limiting wheel 404 in the limiting component 4. The limiting wheels on the fixed seat 401 and the movable seat 402 The limiting wheel 404 works together to ensure that the fabric maintains a stable transmission path between the rotating roller 2 and the winding roller 3. If the thickness or material of the fabric changes, the height of the movable seat 402 and the limiting wheel 404 thereon can be adjusted by rotating the screw 405 to adapt to different fabric requirements. At the same time, the spring 403 provides a certain buffer and stability for the movable seat 402 to ensure that the contact pressure between the limiting wheel 404 and the fabric is moderate. The adjustment component 5 allows the staff to adjust the position of the winding roller 3 according to actual needs. The second pulley 509 is rotated by the handle 501, and the second belt 510 transmits power to another second pulley 509, thereby driving the two first threaded rods 505 to rotate. Since the moving block 506 is fixedly connected to the first threaded rod 505, the rotation of the first threaded rod 505 will drive the moving block 506 to slide on the first guide rail 502, thereby adjusting the position of the winding roller 3. This design enables the winding roller 3 to flexibly adapt to fabrics of different widths. The tension adjustment component 6 adjusts the tension of the fabric through the coordinated action of the pressure roller 603 and the transmission roller 604. The second motor 606 is started, and its output end drives the sprocket 608 to rotate. The chain 607 transmits power to the other sprocket 608, thereby driving the two transmission rollers 604 to rotate. Since the transmission roller 604 is in contact with the fabric, its rotation will apply a certain tension to the fabric. At the same time, the pressure roller 603 The weight or additional force applied will also exert a certain pressure on the fabric, which helps to maintain the flatness and stability of the fabric. If the tension of the fabric needs to be further fine-tuned, the height of the pressure roller 603 can be adjusted by rotating the second threaded rod 601. When the fabric is conveyed and reaches a predetermined length or thickness, the first motor 508 is started, and the output end of the first motor 508 drives the winding roller 3 to rotate and start to wind the fabric. Since one of the adapter blocks 507 is rotatably connected to the first pulley 503, the first belt 504 transmits power to the other first pulley 503, thereby driving the moving block 506 and the winding roller 3 to move as a whole to adapt to the diameter change during the fabric winding process.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A textile fabric conveying device for weaving, comprising two connecting plates (1), characterized in that: A rotating roller (2) is rotatably connected between the two connecting plates (1), a winding roller (3) is provided between the two connecting plates (1), the rotating roller (2) and the winding roller (3) are located on both sides of the connecting plate (1), two limit assemblies (4) are provided on the adjacent outer surfaces of the two connecting plates (1), an adjustment assembly (5) is provided on the outer sides of the two connecting plates (1), and a tension adjustment assembly (6) is provided between the two connecting plates (1), and further comprising: The limiting assembly (4) comprises a fixed seat (401), a movable seat (402) and a limiting wheel (404); the adjacent outer surfaces of the two connecting plates (1) are fixedly connected to two symmetrically distributed fixed seats (401); a movable seat (402) is arranged above the four fixed seats (401); and the outer surfaces of the fixed seats (401) and the movable seats (402) are rotatably connected to the limiting wheel (404); The adjustment component (5) comprises a first pulley (503), a first belt (504), a moving block (506) and a transfer block (507); the moving blocks (506) are provided inside the two connecting plates (1); the two moving blocks (506) are rotatably connected to the winding roller (3); the outer sides of the two moving blocks (506) are fixedly connected to the transfer blocks (507); the outer surface of one of the transfer blocks (507) and the connecting plate (1) are rotatably connected to the first pulley (503); and the outer surfaces of the two first pulleys (503) are sleeved with the first belt (504); The tension adjustment assembly (6) comprises a connecting frame (602), a pressure roller (603) and a transmission roller (604); the adjacent outer surfaces of the two connecting plates (1) are fixedly connected to the connecting frame (602); a pressure roller (603) is provided between the two connecting frames (602); two transmission rollers (604) are rotatably connected between the two connecting frames (602); the pressure roller (603) is located directly above the two transmission rollers (604).

2. A textile fabric conveying device for weaving according to claim 1, characterized in that: The limiting assembly (4) further comprises a spring (403) and a screw (405); the fixed seat (401) is rotatably connected to the inside thereof; the screw (405) is fixedly sleeved with the movable seat (402); the outer surface of the screw (405) is elastically connected to the spring (403); and the spring (403) is located above the movable seat (402).

3. A textile fabric conveying device for weaving according to claim 1, characterized in that: The adjustment assembly (5) further comprises a first threaded rod (505), a second belt pulley (509) and a second belt (510); a fixing frame is fixedly connected between the two connecting plates (1); two second belt pulleys (509) are rotatably connected to the outer surface of the fixing frame; a second belt (510) is sleeved between the two second belt pulleys (509); two first threaded rods (505) are rotatably connected between the connecting plate (1) and the fixing frame; and the two second belt pulleys (509) are fixedly connected to the corresponding first threaded rods (505).

4. A textile fabric conveying device for weaving according to claim 3, characterized in that: Two first guide rails (502) are fixedly connected inside the two connecting plates (1), the two first guide rails (502) are slidably connected to corresponding moving blocks (506), and the two moving blocks (506) are fixedly connected to corresponding first threaded rods (505).

5. A textile fabric conveying device for weaving according to claim 1, characterized in that: A first motor (508) is fixedly mounted on the outer surface of the other adapter block (507), and an output end of the first motor (508) is fixedly connected to the winding roller (3).

6. A textile fabric conveying device for weaving according to claim 3, characterized in that: A handle (501) is rotatably connected to the outer surface of the fixing frame, and the handle (501) is fixedly connected to a second pulley (509) adjacent thereto.

7. A textile fabric conveying device for weaving according to claim 1, characterized in that: The tension adjustment assembly (6) further comprises a second motor (606), a chain (607) and a sprocket (608); the outer surface of the connecting plate (1) is rotatably connected to two sprockets (608); the chain (607) is meshingly connected between the two sprockets (608); and the two sprockets (608) are fixedly connected to corresponding transmission rollers (604).

8. A textile fabric conveying device for weaving according to claim 7, characterized in that: The outer surface of the connecting plate (1) is fixedly connected to a mounting frame, the outer surface of the mounting frame is fixedly mounted with a second motor (606), and the output end of the second motor (606) is fixedly connected to a nearby sprocket (608).

9. A textile fabric conveying device for weaving according to claim 1, characterized in that: The two connecting frames (602) are fixedly connected to the inside of two symmetrically distributed second guide rails (609), a sliding block (605) is slidably connected between the two second guide rails (609), the two sliding blocks (605) are rotatably connected to the pressure roller (603), and the tops of the two connecting frames (602) are rotatably connected to second threaded rods (601), and the two second threaded rods (601) are fixedly connected to the corresponding sliding blocks (605).

10. A textile fabric conveying device for weaving according to claim 1, characterized in that: A third motor (610) is fixedly mounted on the outer surface of one of the connecting frames (602), and an output end of the third motor (610) is fixedly connected to a nearby transmission roller (604).

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