Ultrafine fiber polyurethane synthetic leather kneading and softening equipment

Abstract

The utility model relates to the technical field of synthetic leather processing, and discloses superfine fiber polyurethane synthetic leather kneading and softening equipment which comprises an equipment bottom plate, a feeding seat is fixedly connected to the upper surface of the equipment bottom plate, and a feeding roller, an operation box, a driving motor and a front eccentric seat are rotationally connected into the feeding seat. The synthetic leather softening device is reasonable in structure, steam is discharged into the pipeline in the cover plate through the fan, the steam is sprayed to the surface of synthetic leather through the spray head, the synthetic leather is torn or deformed when softening operation is conducted on the synthetic leather due to the fact that the surface toughness of the synthetic leather is reduced due to the too low temperature of the synthetic leather, and the lifting roller rotates continuously through the lifting motor; and burrs, scraps, dust and the like generated after the surface of the synthetic leather is polished are sucked into the adsorption box from an opening in the lower portion of the adsorption box, the problem that subsequent processing and production are prone to being affected by burrs, dust and the like left on the surface of the synthetic leather is solved, the fixed roller is made to rotate continuously through the fixed motor, the synthetic leather can be extruded, and warped edges generated by the synthetic leather can be flattened.

Description

Technical Field

[0001] The utility model relates to the technical field of synthetic leather processing, in particular to a device for softening ultrafine fiber polyurethane synthetic leather. Background Art

[0002] Polyurethane synthetic leather belongs to a type of polyurethane elastomer. It has a soft, natural luster, soft feel, and a strong leather feel. It has excellent mechanical properties such as excellent adhesion to the substrate, wear resistance, flex resistance, and aging resistance. It also has the advantages of good cold resistance, breathability, washability, easy processing, and low price. It is the most ideal substitute for natural leather.

[0003] A leather softening machine for ultrafine fiber polyurethane synthetic leather is disclosed in the Chinese utility model patent application publication specification CN216074392U. Although the device passes through the device base through the traction of the winding drum, the drive motor can be started when the leather passes through the device base. After the drive motor is started, the transmission belt will drive the eccentric roller to rotate. The eccentric roller will squeeze and stretch the leather during the rotation. However, the existing device does not solve the problem that the surface toughness of the synthetic leather is reduced due to the low temperature, which may cause the synthetic leather to be torn or deformed when the synthetic leather is softened, and the burrs and dust on the surface of the synthetic leather affect the subsequent processing, and the softened synthetic leather is prone to warping, which affects the subsequent processing and aesthetics of the synthetic leather. Therefore, we propose a new device to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a microfiber polyurethane synthetic leather softening device, which solves the problems that the softening effect of the synthetic leather is affected by too low a temperature and that the burrs and dust remaining on the surface of the synthetic leather affect subsequent processing.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a kind of ultra-fine fiber polyurethane synthetic leather softening equipment, comprising an equipment bottom plate, the upper surface of the equipment bottom plate is fixedly connected with a feeding seat, the internal rotation of the feeding seat is connected with a feeding roller, the upper surface of the equipment bottom plate is fixedly connected with an operation box, the internal of the operation box is fixedly connected with a driving motor, one end of the driving motor is plugged with a front eccentric seat, the internal rotation of the front eccentric seat is connected with an eccentric shaft, the other end of the eccentric shaft is rotatably connected with a rear eccentric seat, the back of the rear eccentric seat is fixedly connected with a vibration module, one end of the vibration module is plugged with a vibration motor, the upper surface of the equipment bottom plate is fixedly connected with a steam generator, the upper surface of the steam generator is plugged with a fan, the upper surface of the fan is plugged with a supply pipe, the other end of the supply pipe is plugged with a cover plate, the lower surface of the cover plate is plugged with a nozzle, and the upper surface of the cover plate is plugged with a fixed pipe.

[0008] Optionally, the supply pipe is located on the upper surface of the cover plate close to the left side, and the fixed pipe is located on the upper surface of the cover plate close to the right side.

[0009] Optionally, a hole is provided on the lower surface of the operation box, and a docking hole is provided on the upper surface of the equipment bottom plate, and the fixed pipe is adapted to the hole by passing through the docking hole.

[0010] Optionally, a rotating slide groove is provided on the front side of the rear eccentric seat, and the rear eccentric seat is slidably connected to the eccentric rotating shaft through the rotating slide groove.

[0011] Optionally, there are a plurality of nozzles, and the nozzles are distributed in an array on the lower surface of the cover plate.

[0012] Optionally, a pipeline is opened inside the cover plate, and the supply pipeline and the fixed pipeline are adapted to the nozzle through the pipeline.

[0013] Optionally, a bracket is fixedly connected to the upper surface of the operating box, and the bracket is located on the upper surface of the operating box near the left side. A lifting hydraulic rod is fixedly connected to the lower surface of the bracket, and a lifting seat is inserted at one end of the lifting hydraulic rod. A lifting motor is fixedly connected to the interior of the lifting seat, and a lifting roller is inserted at one end of the lifting motor. An adsorption box is fixedly connected to the right side of the lifting seat, an air pump is inserted at the right side of the adsorption box, and a filter plate is fixedly connected to the interior of the adsorption box.

[0014] Optionally, a fixed rod is fixedly connected to the surface of the operating box, a fixed hydraulic rod is fixedly connected to the lower surface of the fixed rod, a fixed seat is inserted at one end of the fixed hydraulic rod, a fixed motor is fixedly connected inside the fixed seat, a fixed roller is inserted at one end of the fixed motor, a connecting hole is opened inside the fixed seat, the fixed seat is rotatably connected to the fixed roller via the connecting hole, an auxiliary seat is fixedly connected to the upper surface of the base plate of the equipment, and an auxiliary roller is rotatably connected inside the auxiliary seat.

[0015] In summary, the technical effects and advantages of the utility model are:

[0016] 1. The utility model has a reasonable structure. Steam is continuously generated by a steam generator, and then the steam is discharged from the supply pipe into the pipeline inside the cover plate through the fan. Steam is continuously sprayed on the surface of the synthetic leather through the nozzle. The sprayed steam passes through the through holes and the docking holes and enters the fixed pipe, and then is re-discharged into the pipeline inside the cover plate through the fixed pipe, so that the steam self-circulation is realized. Steam is continuously sprayed on the surface of the synthetic leather to soften its surface, which solves the problem that the surface toughness of the synthetic leather is reduced due to the low temperature, which easily leads to the tearing or deformation of the synthetic leather when the synthetic leather is softened. The effect of continuously spraying steam on the synthetic leather before the softening operation is performed to increase its surface temperature and enhance its toughness is achieved, which greatly reduces the damage to the synthetic leather during the softening operation.

[0017] 2. In the utility model, the lifting roller is continuously rotated by the lifting motor, and the burrs and dust on the surface of the synthetic leather can be polished and cleaned. At the same time, the air pump is used to generate negative pressure inside the adsorption box, and the burrs, debris and dust on the surface of the synthetic leather after polishing are sucked into the adsorption box through the opening below the adsorption box, which solves the problem that the burrs and dust on the surface of the synthetic leather are likely to affect the subsequent processing and production, and achieves the effect that the burrs on the surface of the synthetic leather can be polished and the polished debris and surface dust can be adsorbed and collected at the same time, which greatly enhances the cleanliness of the surface of the synthetic leather. The fixed seat is moved downward by the fixed hydraulic rod until the fixed roller and the auxiliary roller clamp and fix one end of the synthetic leather, and then the fixed motor is used to continuously rotate the fixed roller, so that the softened synthetic leather can be squeezed, which solves the problem that the softened synthetic leather is prone to warping, which affects the subsequent processing and aesthetics of the synthetic leather, and achieves the effect of squeezing the synthetic leather to flatten the warped edges, which greatly enhances the aesthetics of the synthetic leather after production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is an exploded schematic diagram of the feed roller structure of the utility model;

[0020] Figure 3This is an exploded schematic diagram of the eccentric shaft structure of the utility model;

[0021] Figure 4 This is an exploded schematic diagram of the cover structure of the utility model;

[0022] Figure 5 This is an exploded schematic diagram of the support structure of the utility model;

[0023] Figure 6 This is an exploded schematic diagram of the auxiliary roller structure of the utility model.

[0024] In the figure: 1. Equipment bottom plate; 2. Feeding seat; 3. Feeding roller; 4. Operation box; 5. Driving motor; 6. Front eccentric seat; 7. Eccentric shaft; 8. Rear eccentric seat; 9. Vibration module; 10. Vibration motor; 11. Steam generator; 12. Fan; 13. Supply pipeline; 14. Cover plate; 15. Nozzle; 16. Fixed pipeline; 17. Bracket; 18. Lifting hydraulic rod; 19. Lifting seat; 20. Lifting motor; 21. Lifting roller; 22. Adsorption box; 23. Air pump; 24. Filter plate; 25. Fixed rod; 26. Fixed hydraulic rod; 27. Fixed seat; 28. Fixed motor; 29. ​​Fixed roller; 30. Auxiliary seat; 31. Auxiliary roller. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example: Reference Figure 1-Figure 6 The ultra-fine fiber polyurethane synthetic leather softening device shown in the figure comprises a device base plate 1, a feed seat 2 is fixedly connected to the upper surface of the device base plate 1, a feed roller 3 is rotatably connected to the inside of the feed seat 2, an operation box 4 is fixedly connected to the upper surface of the device base plate 1, a drive motor 5 is fixedly connected to the inside of the operation box 4, a front eccentric seat 6 is plugged into one end of the drive motor 5, an eccentric shaft 7 is rotatably connected to the inside of the front eccentric seat 6, a rear eccentric seat 8 is rotatably connected to the other end of the eccentric shaft 7, a vibration module 9 is fixedly connected to the back of the rear eccentric seat 8, a vibration motor 10 is plugged into one end of the vibration module 9, a steam generator 11 is fixedly connected to the upper surface of the device base plate 1, a fan 12 is plugged into the upper surface of the steam generator 11, a supply pipe 13 is plugged into the upper surface of the fan 12, a cover plate 14 is plugged into the other end of the supply pipe 13, a nozzle 15 is plugged into the lower surface of the cover plate 14, and a fixed pipe 16 is plugged into the upper surface of the cover plate 14.

[0027] As a preferred implementation in this embodiment, Figure 1-Figure 4 As shown, a feed seat 2 is fixedly connected to the upper surface of the equipment bottom plate 1, and a feed roller 3 is rotatably connected inside the feed seat 2. An operation box 4 is fixedly connected to the upper surface of the equipment bottom plate 1, and a drive motor 5 is fixedly connected inside the operation box 4. A front eccentric seat 6 is plugged into one end of the drive motor 5, and an eccentric shaft 7 is rotatably connected inside the front eccentric seat 6. The other end of the eccentric shaft 7 is rotatably connected to a rear eccentric seat 8. A rotating slide groove is provided on the front of the rear eccentric seat 8, and the rear eccentric seat 8 is slidably connected to the eccentric shaft 7 through the rotating slide groove. A vibration module 9 is fixedly connected to the back of the rear eccentric seat 8, and a vibration motor 10 is plugged into one end of the vibration module 9. A steam generator 1 is fixedly connected to the upper surface of the equipment bottom plate 1 1. A fan 12 is plugged into the upper surface of the steam generator 11, a supply pipe 13 is plugged into the upper surface of the fan 12, a cover plate 14 is plugged into the other end of the supply pipe 13, a nozzle 15 is plugged into the lower surface of the cover plate 14, and the number of nozzles 15 is several, and the nozzles 15 are arranged on the lower surface of the cover plate 14, a fixed pipe 16 is plugged into the upper surface of the cover plate 14, a pipeline is opened inside the cover plate 14, and the supply pipe 13 and the fixed pipe 16 are adapted to the nozzle 15 through the pipeline, a hole is opened on the lower surface of the operation box 4, and a docking hole is opened on the upper surface of the equipment bottom plate 1, and the fixed pipe 16 is adapted to the hole by penetrating the docking hole, and the supply pipe 13 is located on the cover plate 14. The fixed pipe 16 is located near the left side of the surface of the cover plate 14, and the fixed pipe 16 is located near the right side of the cover plate 14. During use, the synthetic leather is placed on the surface of the feed roller 3, and then one end of the synthetic leather is placed inside the equipment, and steam is continuously generated by the steam generator 11, and then the steam is discharged from the supply pipe 13 into the pipeline inside the cover plate 14 through the fan 12, and the steam is continuously sprayed on the surface of the synthetic leather through the nozzle 15. The sprayed steam passes through the through holes and the docking holes and enters the fixed pipe 16, and then is re-discharged from the fixed pipe 16 into the pipeline inside the cover plate 14, so that the steam self-circulation is realized, and the surface of the synthetic leather is continuously sprayed with steam to soften its surface, thereby solving the problem that the temperature of the synthetic leather is too low and its surface is softened. The decrease in surface toughness can easily lead to the problem that the synthetic leather is torn or deformed when the synthetic leather is softened. The effect of continuously spraying steam on the synthetic leather before the softening operation is performed to increase its surface temperature and enhance its toughness is achieved, which greatly reduces the damage to the synthetic leather during the softening operation. The front eccentric seat 6, the eccentric shaft 7 and the rear eccentric seat 8 are continuously rotated by driving the motor 5. At the same time, the vibration module 9 is driven by the vibration motor 10 to continuously vibrate the rear eccentric seat 8. The synthetic leather will be squeezed and stretched during the rotation of the eccentric shaft 7, and the vibration module 9 will continuously vibrate the eccentric shaft 7 during the rotation of the eccentric shaft 7, thereby exerting an oscillation effect on the synthetic leather, thereby improving the softening efficiency.

[0028] like Figure 5 and Figure 6As shown, in this embodiment, the upper surface of the operation box 4 is fixedly connected with a bracket 17, and the bracket 17 is located near the left side of the upper surface of the operation box 4. The lower surface of the bracket 17 is fixedly connected with a lifting hydraulic rod 18, and one end of the lifting hydraulic rod 18 is plugged with a lifting seat 19, and the interior of the lifting seat 19 is fixedly connected with a lifting motor 20, and one end of the lifting motor 20 is plugged with a lifting roller 21. The right side of the lifting seat 19 is fixedly connected with an adsorption box 22, and the right side of the adsorption box 22 is plugged with an air pump 23, and the interior of the adsorption box 22 is fixedly connected with a filter plate 24. The surface of the operation box 4 is fixedly connected with a fixed rod 25, and the lower surface of the fixed rod 25 is fixedly connected with a fixed hydraulic rod 26, and one end of the fixed hydraulic rod 26 is plugged with a fixed seat 27. The fixed seat A fixed motor 28 is fixedly connected to the interior of the fixed motor 28, and a fixed roller 29 is plugged into one end of the fixed motor 28. A connecting hole is provided inside the fixed seat 27, and the fixed seat 27 is rotatably connected to the fixed roller 29 through the connecting hole. An auxiliary seat 30 is fixedly connected to the upper surface of the equipment bottom plate 1, and an auxiliary roller 31 is rotatably connected to the interior of the auxiliary seat 30. A driving slot is provided on the upper surface of the equipment bottom plate 1, and a driver is provided inside the driving slot. The driver model is DM556, which is a digital two-phase stepper motor driver based on a 32-bit motor-specific processor. It can set the subdivision within 400 to 51200 and any current value within the rated current, which can meet the application needs of most occasions. The driver is integrated with the motor parameter automatic recognition function. The distinguishing function can identify 57 / 60 motors of different specifications, automatically generate the optimal operating parameters, and maximize the performance of the motor. The motor runs smoothly, with low vibration, low noise, and high output. During use, the lifting seat 19 is moved downward by the lifting hydraulic rod 18 until the lifting roller 21 contacts the upper surface of the synthetic leather. The lifting motor 20 is used to make the lifting roller 21 rotate continuously, and the burrs and dust on the surface of the synthetic leather can be polished and cleaned. At the same time, the air pump 23 is used to generate negative pressure inside the adsorption box 22, and the burrs and dust on the surface of the synthetic leather after polishing are sucked into the adsorption box 22 through the opening below the adsorption box 22. The debris and dust sucked into the adsorption box 22 can be adsorbed and collected through the filter plate 24, which solves the problem of synthetic leather. The problem of residual burrs and dust on the surface that may affect subsequent processing and production is solved. The burrs on the surface of synthetic leather can be polished and the polished debris and surface dust can be adsorbed and collected at the same time, which greatly enhances the cleanliness of the surface of synthetic leather. The fixed seat 27 is moved downward by fixing the hydraulic rod 26 until the fixed roller 29 and the auxiliary roller 31 clamp one end of the synthetic leather, and then the fixed roller 29 is continuously rotated by fixing the motor 28, so that the softened synthetic leather can be extruded, which solves the problem that the softened synthetic leather is prone to warping, which affects the subsequent processing and aesthetics of the synthetic leather. The effect of flattening the warped edges produced by the extrusion process on the synthetic leather is achieved, which greatly enhances the aesthetics of the synthetic leather after production.

[0029] How this utility works:

[0030] During use, synthetic leather is placed on the surface of the feed roller 3, and one end of the synthetic leather is placed inside the device. Steam is continuously generated by the steam generator 11, and then the steam is discharged from the supply pipe 13 into the pipeline inside the cover plate 14 through the fan 12. Steam is continuously sprayed on the surface of the synthetic leather through the nozzle 15. The sprayed steam passes through the through holes and the docking holes and enters the fixed pipe 16. Then, the fixed pipe 16 is re-discharged into the pipeline inside the cover plate 14, so that steam self-circulation is realized, and steam is continuously sprayed on the surface of the synthetic leather to soften the surface, thereby solving the problem that the surface toughness of the synthetic leather decreases due to the low temperature, which is easy to cause damage to the synthetic leather. The problem of synthetic leather being torn or deformed during softening operation is solved by continuously spraying steam on the synthetic leather before softening operation to increase its surface temperature and enhance its toughness, which greatly reduces the damage to the synthetic leather during softening operation. The front eccentric seat 6, the eccentric shaft 7 and the rear eccentric seat 8 are continuously rotated by driving the motor 5, and the vibration module 9 is driven by the vibration motor 10 to continuously vibrate the rear eccentric seat 8. The synthetic leather will be squeezed and stretched during the rotation of the eccentric shaft 7, and the vibration module 9 will continuously vibrate the eccentric shaft 7 during the rotation of the eccentric shaft 7, thereby exerting an oscillation effect on the synthetic leather, thereby improving the The lifting and softening efficiency is improved. The lifting seat 19 is moved downward by the lifting hydraulic rod 18 until the lifting roller 21 contacts the upper surface of the synthetic leather. The lifting motor 20 is used to continuously rotate the lifting roller 21, so that the burrs and dust on the surface of the synthetic leather can be polished and cleaned. At the same time, the air pump 23 is used to generate negative pressure inside the adsorption box 22, and the burrs, debris and dust on the surface of the synthetic leather after polishing are sucked into the adsorption box 22 through the opening below the adsorption box 22. The debris and dust sucked into the adsorption box 22 can be adsorbed and collected through the filter plate 24, which solves the problem that the burrs and dust on the surface of the synthetic leather are easily affected by the subsequent processing and production, and the surface of the synthetic leather can be cleaned. The rough edges of the surface can be polished and the polished debris and surface dust can be adsorbed and collected at the same time, which greatly enhances the cleanliness of the surface of the synthetic leather. The fixed seat 27 is moved downward by fixing the hydraulic rod 26 until the fixed roller 29 and the auxiliary roller 31 clamp one end of the synthetic leather, and then the fixed motor 28 is used to make the fixed roller 29 rotate continuously, so that the softened synthetic leather can be extruded, which solves the problem that the softened synthetic leather is prone to warping and other problems that affect the subsequent processing and aesthetics of the synthetic leather, and achieves the effect of flattening the warped edges produced by the extrusion process on the synthetic leather, which greatly enhances the aesthetics of the synthetic leather after production.

[0031] The electrical components appearing in this article are all connected to the external main controller DM556 and 220V AC power, and the main controller can be a conventional known device for control such as a computer.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A microfiber polyurethane synthetic leather softening device, comprising a device bottom plate (1), characterized in that: The upper surface of the equipment bottom plate (1) is fixedly connected to a feed seat (2), the feed seat (2) is internally rotatably connected to a feed roller (3), the upper surface of the equipment bottom plate (1) is fixedly connected to an operation box (4), the operation box (4) is internally fixedly connected to a drive motor (5), one end of the drive motor (5) is plugged with a front eccentric seat (6), the front eccentric seat (6) is internally rotatably connected to an eccentric shaft (7), the other end of the eccentric shaft (7) is rotatably connected to a rear eccentric seat (8), and the back of the rear eccentric seat (8) is A vibration module (9) is fixedly connected, one end of the vibration module (9) is plugged with a vibration motor (10), the upper surface of the equipment bottom plate (1) is fixedly connected with a steam generator (11), the upper surface of the steam generator (11) is plugged with a fan (12), the upper surface of the fan (12) is plugged with a supply pipe (13), the other end of the supply pipe (13) is plugged with a cover plate (14), the lower surface of the cover plate (14) is plugged with a nozzle (15), and the upper surface of the cover plate (14) is plugged with a fixed pipe (16).

2. The ultrafine fiber polyurethane synthetic leather softening device according to claim 1, characterized in that: The supply pipe (13) is located on the upper surface of the cover plate (14) close to the left side, and the fixed pipe (16) is located on the upper surface of the cover plate (14) close to the right side.

3. The ultrafine fiber polyurethane synthetic leather softening device according to claim 1, characterized in that: The lower surface of the operation box (4) is provided with a hole, the upper surface of the equipment bottom plate (1) is provided with a docking hole, and the fixed pipe (16) penetrates the docking hole and fits with the hole.

4. The ultra-fine fiber polyurethane synthetic leather softening device according to claim 1, characterized in that: A rotating slide groove is provided on the front side of the rear eccentric seat (8), and the rear eccentric seat (8) is slidably connected to the eccentric rotating shaft (7) via the rotating slide groove.

5. The ultra-fine fiber polyurethane synthetic leather softening device according to claim 1, characterized in that: The number of the nozzles (15) is a plurality, and the plurality of nozzles (15) are distributed in an array on the lower surface of the cover plate (14).

6. The ultra-fine fiber polyurethane synthetic leather softening device according to claim 1, characterized in that: A pipeline is provided inside the cover plate (14), and the supply pipeline (13) and the fixed pipeline (16) are adapted to the spray head (15) via the pipeline.

7. The ultrafine fiber polyurethane synthetic leather softening device according to claim 1, characterized in that: The upper surface of the operation box (4) is fixedly connected to a bracket (17), the bracket (17) is located near the left side of the upper surface of the operation box (4), the lower surface of the bracket (17) is fixedly connected to a lifting hydraulic rod (18), one end of the lifting hydraulic rod (18) is plugged into a lifting seat (19), the interior of the lifting seat (19) is fixedly connected to a lifting motor (20), one end of the lifting motor (20) is plugged into a lifting roller (21), the right side of the lifting seat (19) is fixedly connected to an adsorption box (22), the right side of the adsorption box (22) is plugged into an air pump (23), and the interior of the adsorption box (22) is fixedly connected to a filter plate (24).

8. The ultra-fine fiber polyurethane synthetic leather softening device according to claim 1, characterized in that: A fixed rod (25) is fixedly connected to the surface of the operating box (4), a fixed hydraulic rod (26) is fixedly connected to the lower surface of the fixed rod (25), a fixed seat (27) is inserted at one end of the fixed hydraulic rod (26), a fixed motor (28) is fixedly connected inside the fixed seat (27), a fixed roller (29) is inserted at one end of the fixed motor (28), a connecting hole is provided inside the fixed seat (27), the fixed seat (27) is rotatably connected to the fixed roller (29) via the connecting hole, an auxiliary seat (30) is fixedly connected to the upper surface of the equipment bottom plate (1), and an auxiliary roller (31) is rotatably connected inside the auxiliary seat (30).

Images