Leather turning dryer and drying method

Abstract

The application discloses a turnover drying machine and drying method for leather bags, and relates to the technical field of leather drying. The application comprises a rack, the top surface of the rack is fixedly provided with a drying cylinder, the end surface of the drying cylinder is provided with a sealing door, the back surface of the drying cylinder is fixedly provided with a transmission assembly, the top surface of the drying cylinder is fixedly provided with an air pump and a hot air fan respectively, the inside of the drying cylinder is fixedly provided with a cloth air distribution cavity, one end of the air outlet of the hot air fan is fixedly communicated with the cloth air distribution cavity, a plurality of groups of hot air injection holes are arranged in a circumferential array on the inner wall of the drying cylinder and are communicated with the cloth air distribution cavity, the inner wall of the drying cylinder is rotatably connected with a turnover mechanism, and the circumferential surface of the transmission assembly is drivingly connected with the turnover mechanism. Through the arrangement of the turnover frame and the winding assembly, the application can efficiently complete the drying operation of the leather, and through the arrangement of the turnover mechanism, the application changes the traditional static single-side drying structure of the leather into a turnover multi-surface and multi-angle drying structure.

Description

Technical Field

[0001] This invention belongs to the field of leather drying technology, and in particular relates to a tumble dryer and drying method for leather bags. Background Technology

[0002] With the long-term development of the market, people are using leather more and more, leading to a continuous increase in demand for leather. During leather processing, leather dryers are needed to dry the leather, allowing it to be processed more effectively in subsequent steps and improving the overall efficiency of leather processing.

[0003] In the prior art, patent document CN215517491U discloses a leather dryer with a stretching component, including a main body and a conveyor roller. A feed inlet is located on the left side of the main body, and a support frame is installed inside the main body. The conveyor roller is located inside the support frame, a conveyor shaft is installed on one side of the conveyor roller, and a driven gear is located on the right side of the conveyor shaft. A drive gear is installed at the bottom of the driven gear to stretch the leather, preventing folding during drying and improving the drying efficiency. However, the aforementioned leather drying device cannot achieve multi-faceted drying of the leather, resulting in low drying efficiency. Furthermore, it cannot achieve dynamic repeated drying, making it difficult to guarantee both the drying effect and the drying time. Additionally, the aforementioned drying device cannot cyclically change the drying intensity of the leather while stretching it. Therefore, this invention provides a tumbling dryer and drying method for bag leather to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide a tumbling dryer and drying method for leather bags. By setting up a tumbling mechanism, a winding assembly and other structures, the invention solves the problems of poor drying efficiency and difficulty in guaranteeing the drying effect of existing dryers.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a tumbling dryer for leather bags, comprising a frame, a drying cylinder fixedly mounted on the top surface of the frame, a sealing door mounted on the end face of the drying cylinder, a transmission assembly fixedly mounted on the back of the drying cylinder, an air pump and a hot air blower fixedly mounted on the top surface of the drying cylinder, an air distribution chamber fixedly opened inside the drying cylinder, one end of the air outlet of the hot air blower being fixedly connected to the air distribution chamber, several sets of hot air nozzles arranged in a circumferential array and connected to the air distribution chamber being opened on the inner wall of the drying cylinder, a tumbling mechanism being rotatably connected to the inner wall of the drying cylinder, the peripheral side of the transmission assembly being throttlely connected to the tumbling mechanism, and the port of the air pump being rotatably connected to the tumbling mechanism.

[0007] Furthermore, the transmission components include a main shaft, a servo motor, and a tilting motor. One surface of the servo motor and the tilting motor is fixedly connected to the drying cylinder. A forward rotating shaft and a reverse rotating shaft are rotatably connected to the circumferential side of the main shaft. The circumferential side of the forward rotating shaft and the reverse rotating shaft are rotatably connected to the drying cylinder. A driven bevel gear is fixedly installed on the circumferential side of the forward rotating shaft and the reverse rotating shaft. A driving bevel gear is fixedly installed on the output shaft end of the servo motor. The circumferential side of the driving bevel gear meshes with two driven bevel gears. The two driven bevel gears are symmetrically arranged about the vertical plane containing the axis of the driving bevel gear. The output shaft end of the tilting motor is fixedly connected to the main shaft. The circumferential side of the main shaft, the forward rotating shaft, and the reverse rotating shaft are all transmission connected to the tilting mechanism.

[0008] Furthermore, the flipping mechanism includes a flipping frame, the interior of which is fixedly provided with a cavity. Both ends of the flipping frame are fixedly connected to inner shaft tubes. The peripheral surfaces of the two inner shaft tubes are connected to the main shaft via belts. The tail ends of the two inner shaft tubes are fixedly connected to the cavity. The port of the air pump is rotatably connected to one of the inner shaft tubes via a pipe. Rotary flipping frames are fixedly installed on the peripheral surfaces of the two inner shaft tubes. Winding assemblies are fixedly installed on the surfaces of the two rotating frames. A leather body is wound between the opposing surfaces of the two winding assemblies. Outer rotating rings are rotatably connected to the peripheral surfaces of the two inner shaft tubes. The peripheral surfaces of the two outer rotating rings are rotatably connected to the drying cylinder. The peripheral surfaces of the forward and reverse rotating shafts are respectively driven to the two outer rotating rings. Driven bevel gear rings are fixedly installed on the inner walls of the two outer rotating rings. The inner walls of the two drive bevel gear rings are respectively driven to the two winding assemblies. The inner wall of the flipping frame is also fixedly installed with a tensioning assembly that mates with the leather body.

[0009] Furthermore, the tensioning assembly includes two sets of symmetrically arranged elastic pressure members and two sets of symmetrically arranged pneumatic push rods. Each set of elastic pressure members has a driven pressure seat fixedly installed at its bottom end, and each set of pneumatic push rods has an active pressure seat fixedly installed at its top end. The inner walls of the active pressure seat and the driven pressure seat are rotatably connected to tensioning rollers that cooperate with the leather body. The tail end of the pneumatic push rod is fixedly connected to the cavity.

[0010] Furthermore, the pneumatic push rod is positioned between two sets of elastic pressure components, and the driven pressure seat is positioned below the active pressure seat.

[0011] Furthermore, the elastic pressure-applying component includes a vertically arranged damping telescopic tube, the movable end of which is fixedly connected to the driven pressure seat, and an anti-compression spring is sleeved on the peripheral side of the damping telescopic tube.

[0012] Furthermore, the winding assembly includes a bracket fixedly connected to the rotating frame. A winding roller is rotatably connected to the inner wall of the bracket. The inside of the winding roller has a pressurizing chamber and a pressure chamber that are isolated from each other, arranged sequentially from the outside to the inside. A set of support bladders arranged in a circular array are fixedly installed on the circumferential side of the winding roller. The tail end of each support bladder is fixedly connected to the pressure chamber. A set of vent holes is provided between the opposing surfaces of the pressurizing chamber and the pressure chamber. A pressure piston is slidably connected to the inner wall of the pressure chamber. A transmission screw is rotatably connected to the axial position of the winding roller. The circumferential side of the transmission screw is connected to the pressure piston. A linkage bevel gear is fixedly installed at the tail end of the winding roller. The circumferential side of the linkage bevel gear meshes with a transmission bevel gear ring at an adjacent position.

[0013] Furthermore, a handle is fixedly installed on the peripheral side of the transmission screw, a sealing ring that mates with the drum pressure cavity is fixedly installed on the peripheral side of the drum pressure piston, and a plurality of guide grooves that mate with the drum pressure piston are fixedly opened on the inner wall of the drum pressure cavity, the extending direction of the guide grooves being parallel to the axis of the roller.

[0014] Furthermore, the surface of the drying cylinder is fixedly installed on the exhaust pipe connected to the air distribution chamber, and an air valve is fixedly installed inside the exhaust pipe. The axis of the hot air nozzle is perpendicular to the axis of the drying cylinder.

[0015] The drying method for leather goods using a tumble dryer includes the following steps:

[0016] SS001, Loading: Before drying the bag leather, open the sealing door and place the rolled bag leather onto the roller in a winding assembly. After placement, adjust the drive screw in the roller to ensure that the roller can fully clamp the bag leather roll. After the bag leather roll is fixed, fix the other end of the leather body onto the roller in another winding assembly. When the leather body is fixed onto the other roller, the leather body passes through the tension rollers in the driven pressure seat and the active pressure seat in sequence. After the layout is completed, close the sealing door.

[0017] SS002. Leather Drying: During leather drying, the tumbling motor outputs a speed according to set parameters. By controlling the speed of the tumbling motor, the tumbling rate of the tumbling frame is controlled. When the tumbling motor is working, the servo motor outputs a speed according to set parameters. By setting the output speed of the servo motor, the unwinding speed of one roller and the winding speed of the other roller are set. After the servo motor is working, it drives the leather body to unwind and wind. When the servo motor is working, its output direction changes within a set cycle to repeatedly change the drying surface of the leather. When the servo motor is working, the air pump repeatedly draws and inflates air into the cavity at a set frequency. Through the repeated drawing and inflation of air by the air pump, the pneumatic push rod is reciprocated. After the pneumatic push rod reciprocates, it repeatedly changes the distance between the leather body and the hot air nozzle, thereby repeatedly changing the heat intensity of the leather body.

[0018] The present invention has the following beneficial effects:

[0019] 1. This invention, through the design of a flipping mechanism and a winding assembly, enables the device to efficiently complete the drying of leather. During drying, the flipping mechanism transforms the traditional static single-sided drying structure of leather into a multi-sided, multi-angle drying structure. The flipping and multi-sided drying effects effectively improve the drying rate of the leather. Furthermore, the two winding assemblies allow the leather to reciprocate during repeated unwinding and winding. The synchronous occurrence of the flipping and reciprocating motion effectively ensures the drying effect and uniformity of the leather.

[0020] 2. By setting up a tensioning component and an air pump, this invention can not only achieve the tensioning effect during leather drying, but also repeatedly change the heating position and heating angle of the leather. By cyclically changing the heating position and heating angle, the heating intensity of the leather is cyclically changed. Furthermore, the reciprocating tensioning structure of this device can effectively improve the flattening strength of the leather and the anti-wrinkle effect during leather drying.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a tumble dryer for leather goods.

[0024] Figure 2 for Figure 1 A structural diagram from another angle;

[0025] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0026] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure;

[0027] Figure 5 for Figure 4 A magnified view of the structure at point B in the middle;

[0028] Figure 6A schematic diagram of the inner shaft tube, the rotating frame, and the leather body;

[0029] Figure 7 This is a schematic diagram of the tensioning roller and the linkage bevel gear.

[0030] Figure 8 This is a schematic diagram of the winding assembly.

[0031] Figure 9 This is a schematic cross-sectional view of the drum piston and the drive screw.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Frame; 2. Drying cylinder; 3. Sealing door; 4. Air pump; 5. Hot air blower; 6. Air distribution chamber; 7. Hot air nozzle; 8. Main shaft; 9. Servo motor; 10. Tilting motor; 11. Forward rotating shaft; 12. Reverse rotating shaft; 13. Driving bevel gear; 14. Driven bevel gear; 15. Tilting frame; 16. Cavity; 17. Inner shaft tube; 18. Rotating frame; 19. Leather body; 20. Winding assembly; 21. Outer rotating ring; 22. Transmission bevel gear ring; 23. Elastic pressure component; 24. Pneumatic push rod; 25. Driven pressure seat; 26. Driving pressure seat; 27. Tensioning roller; 28. Support; 29. ​​Rolling roller; 30. Pressurizing chamber; 31. Drum pressure chamber; 32. Support bladder; 33. Vent hole; 34. Drum pressure piston; 35. Transmission screw; 36. Linkage bevel gear. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-9 The present invention is a tumbling dryer for leather bags, including a frame 1, a drying cylinder 2 fixedly installed on the top surface of the frame 1, the drying cylinder 2 is a hollow cylindrical structure, and the interior of the drying cylinder 2 is fixedly filled with heat insulation material, which is heat insulation cotton. A sealing door 3 is installed on the end face of the drying cylinder 2. Specifically, the sealing door 3 is hinged to the drying cylinder 2, and a handle is fixedly installed on the end face of the sealing door 3.

[0036] A transmission assembly is fixedly installed on the back of the drying cylinder 2, and an air pump 4 and a hot air blower 5 are fixedly installed on the top surface of the drying cylinder 2 respectively.

[0037] Air pump 4 is a dual-purpose pump for both suction and inflation; that is, air pump 4 can perform both suction and inflation operations.

[0038] The hot air blower 5 is equipped with a temperature control circuit or a temperature control resistor. By setting the temperature control circuit or temperature control resistor, the outlet air temperature of the hot air blower 5 can be effectively controlled. Specifically, the hot air blower 5 is in a constant temperature hot air outlet state when it is working. A dust filter screen is fixedly installed at one end of the air inlet of the hot air blower 5.

[0039] Hot air blower 5 is a commonly used component in existing technology, and will not be described in detail here;

[0040] An air distribution chamber 6 is fixedly opened inside the drying cylinder 2, and an exhaust pipe connected to the air distribution chamber 6 is fixedly installed on the surface of the drying cylinder 2. An air valve is fixedly installed inside the exhaust pipe.

[0041] The purpose of the exhaust pipe is to expel moisture from inside the dryer cylinder 2;

[0042] One end of the air outlet of the hot air blower 5 is fixedly connected to the air distribution chamber 6. The inner wall of the drying cylinder 2 is provided with several sets of hot air nozzles 7 arranged in a circular array and connected to the air distribution chamber 6. The axis of the hot air nozzles 7 is perpendicular to the axis of the drying cylinder 2.

[0043] The hot air nozzle 7 is a circular hole. In actual production, the diameter of the hot air nozzle 7 can be customized according to actual needs.

[0044] The inner wall of the drying cylinder 2 is rotatably connected to a flipping mechanism, the circumferential side of the transmission component is connected to the flipping mechanism, and the port of the air pump 4 is rotatably connected to the flipping mechanism.

[0045] The transmission components include a main shaft 8, a servo motor 9, and a tilting motor 10. One surface of the servo motor 9 and the tilting motor 10 are fixedly connected to the drying cylinder 2. The circumferential side of the main shaft 8 is rotatably connected to a forward rotating shaft 11 and a reverse rotating shaft 12. The circumferential side of the forward rotating shaft 11 and the reverse rotating shaft 12 are rotatably connected to the drying cylinder 2. Driven bevel gears 14 are fixedly installed on the circumferential side of the forward rotating shaft 11 and the reverse rotating shaft 12. The two driven bevel gears 14 have the same specifications.

[0046] The output shaft end of the servo motor 9 is fixedly mounted with a drive bevel gear 13. The peripheral side of the drive bevel gear 13 meshes with two driven bevel gears 14 respectively. The two driven bevel gears 14 are symmetrically arranged about the vertical plane where the axis of the drive bevel gear 13 is located.

[0047] By setting two driven bevel gears 14 and a driving bevel gear 13, the servo motor 9 can effectively transmit power to the forward rotating shaft 11 and the reverse rotating shaft 12. By setting the positions of the two driven bevel gears 14 and the driving bevel gear 13, the rotation speed of the forward rotating shaft 11 and the reverse rotating shaft 12 are the same and their rotation directions are opposite.

[0048] The output shaft of the flipping motor 10 is fixedly connected to the main shaft 8, and the peripheral surfaces of the main shaft 8, the forward rotating shaft 11, and the reverse rotating shaft 12 are all connected to the flipping mechanism for transmission.

[0049] The flipping mechanism includes a flipping frame 15, with a cavity 16 fixedly opened inside the flipping frame 15. Both ends of the flipping frame 15 are fixedly connected to an inner shaft tube 17. The peripheral sides of the two inner shaft tubes 17 are connected to the main shaft 8 via belts. The tail ends of the two inner shaft tubes 17 are fixedly connected to the cavity 16. The inner shaft tube 17 is a hollow tubular structure with openings at both ends.

[0050] The port of the air pump 4 is rotatably connected to an inner shaft tube 17 via a pipe;

[0051] The function of the air pump 4 is to pump air into and inflate the cavity 16.

[0052] Two inner shaft tubes 17 are fixedly mounted with a rotating frame 18 on their circumferential sides. Two rotating frames 18 are fixedly mounted with a winding assembly 20 on their surfaces. A leather body 19 is wound between the opposing surfaces of the two winding assemblies 20.

[0053] The winding assembly 20 includes a bracket 28 fixedly connected to the rotating frame 18. A winding roller 29 is rotatably connected to the inner wall of the bracket 28. The inside of the winding roller 29 is provided with a pressurizing chamber 30 and a drum-pressing chamber 31 that are isolated from each other from the outside to the inside. A set of support bladders 32 arranged in a circular array are fixedly installed on the circumferential side of the winding roller 29. The tail end of each support bladder 32 is fixedly connected to the drum cavity 16. The support bladders 32 are made of silicone. The function of the support bladders 32 is to perform positioning and clamping operations on the leather roll. By adjusting the air volume inside the pressurizing chamber 30, the expansion degree of the support bladders 32 can be adjusted, thereby adjusting the clamping force of the support bladders 32 on the leather roll.

[0054] A set of vent holes 33 is provided between the opposing surfaces of the pressurizing chamber 30 and the drum pressing chamber 31. A drum pressing piston 34 is slidably connected to the inner wall of the drum pressing chamber 31. A sealing ring that cooperates with the drum pressing chamber 31 is fixedly installed on the circumferential side of the drum pressing piston 34. By setting the sealing ring, the sealing performance of the sliding connection between the drum pressing piston 34 and the drum pressing chamber 31 is effectively guaranteed.

[0055] The inner wall of the drum pressing cavity 31 is fixedly provided with several guide grooves that cooperate with the drum pressing piston 34, and the extension direction of the guide grooves is parallel to the axis of the roller 29.

[0056] A transmission screw 35 is rotatably connected to the axis of the roller 29. A handle is fixedly installed on the circumferential side of the transmission screw 35. The circumferential side of the transmission screw 35 is connected to the pressure piston 34. The function of the transmission screw 35 is to drive the pressure piston 34 to change its position, thereby ultimately changing the pressure inside the pressurization chamber 30.

[0057] Two inner shaft tubes 17 are rotatably connected to outer rotating rings 21. The two outer rotating rings 21 are rotatably connected to the drying cylinder 2. The circumferential surfaces of the positive rotating shaft 11 and the negative rotating shaft 12 are respectively connected to the two outer rotating rings 21. The inner walls of the two outer rotating rings 21 are fixedly installed with transmission bevel gear rings 22. The inner walls of the two transmission bevel gear rings 22 are respectively connected to the two winding assemblies 20. The tail end of the winding roller 29 is fixedly installed with a linkage bevel gear 36. The circumferential surface of the linkage bevel gear 36 meshes with the adjacent transmission bevel gear ring 22.

[0058] The inner wall of the flip frame 15 is also fixedly installed with a tensioning assembly that matches the leather body 19.

[0059] The tensioning assembly includes two sets of symmetrically arranged elastic pressure members 23 and two sets of symmetrically arranged pneumatic push rods 24. Each set of elastic pressure members 23 has a driven pressure seat 25 fixedly installed at its bottom end.

[0060] The elastic pressure-applying component 23 includes a vertically arranged damping telescopic tube, the movable end of which is fixedly connected to the driven pressure seat 25, and an anti-compression spring is sleeved on the circumferential side of the damping telescopic tube.

[0061] Each set of pneumatic push rods 24 has an active pressure seat 26 fixedly installed at its top. The inner walls of the active pressure seat 26 and the driven pressure seat 25 are rotatably connected to tension rollers 27 that cooperate with the leather body 19. The tail end of the pneumatic push rod 24 is fixedly connected to the cavity 16.

[0062] The pneumatic push rod 24 is positioned between two sets of elastic pressure members 23, and the driven pressure seat 25 is positioned below the active pressure seat 26. Both the active pressure seat 26 and the driven pressure seat 25 are U-shaped structures.

[0063] The drying method for leather goods using a tumble dryer includes the following steps:

[0064] SS001, Loading: Before drying the bag leather, open the sealing door 3 and place the rolled bag leather onto the roller 29 in a winding assembly 20. After placement, adjust the transmission screw 35 in the roller 29 to ensure that the roller 29 can fully clamp the bag leather roll. After the bag leather roll is fixed, fix the other end of the leather body 19 onto the roller 29 in another winding assembly 20. When the leather body 19 is fixed onto the other roller 29, the leather body 19 passes through the tension roller 27 in the driven pressure seat 25 and the active pressure seat 26 in sequence. After the layout is completed, close the sealing door 3.

[0065] SS002, Leather Drying: During leather drying, the flip motor 10 outputs a speed with set parameters. By controlling the speed of the flip motor 10, the flipping rate of the flipping frame 15 is controlled. When the flip motor 10 is working, the servo motor 9 outputs a speed with set parameters. By setting the output speed of the servo motor 9, the unwinding speed of one roller 29 and the winding speed of the other roller 29 are set. After the servo motor 9 is working, it drives the leather body 19 to unwind and wind. When the servo motor 9 is working, its output direction changes within a set cycle to repeatedly change the surface of the leather to be dried. When the servo motor 9 is working, the air pump 4 repeatedly draws and inflates air into the cavity 16 at a set frequency. Through the repeated drawing and inflation of air by the air pump 4, the pneumatic push rod 24 is reciprocated. After the pneumatic push rod 24 reciprocates, it then repeatedly changes the distance between the leather body 19 and the hot air nozzle 7, thereby repeatedly changing the heat intensity of the leather body 19.

[0066] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A turnover drying machine for leather suitcase, comprising a frame (1), a drying cylinder (2) is fixedly installed on the top surface of the frame (1), an end surface of the drying cylinder (2) is installed with a sealing door (3), characterized in that The back surface of the drying cylinder (2) is fixedly provided with a transmission assembly, the top surface of the drying cylinder (2) is respectively fixedly provided with an air pump (4) and a hot air machine (5), the inside of the drying cylinder (2) is fixedly provided with a wind distribution cavity (6), one end of the air outlet of the hot air machine (5) is fixedly communicated with the wind distribution cavity (6), the inner wall of the drying cylinder (2) is provided with a plurality of groups of hot air injection holes (7) which are distributed in a circumferential array and communicated with the wind distribution cavity (6), the inner wall of the drying cylinder (2) is rotatably connected with a turnover mechanism, the circumferential surface of the transmission assembly is drivingly connected with the turnover mechanism, and the port of the air pump (4) is rotatably communicated with the turnover mechanism. The transmission assembly respectively comprises a main shaft (8), a servo motor (9) and a turnover motor (10), one surface of the servo motor (9) and the turnover motor (10) is fixedly connected with the drying cylinder (2), the peripheral surface of the main shaft (8) is respectively rotationally connected with a positive rotation shaft (11) and a reverse rotation shaft (12), the peripheral surface of the positive rotation shaft (11) and the reverse rotation shaft (12) is rotationally connected with the drying cylinder (2), the peripheral surface of the positive rotation shaft (11) and the reverse rotation shaft (12) is fixedly installed with a driven bevel gear (14), the output shaft end of the servo motor (9) is fixedly installed with a driving bevel gear (13), the peripheral surface of the driving bevel gear (13) is respectively engaged with two driven bevel gears (14), the two driven bevel gears (14) are symmetrically arranged with the vertical plane of the axis of the driving bevel gear (13) as the axis, the output shaft end of the turnover motor (10) is fixedly connected with the main shaft (8), the peripheral surface of the main shaft (8), the positive rotation shaft (11) and the reverse rotation shaft (12) is transmissionally connected with the turnover mechanism; the turnover mechanism comprises a turnover frame (15), the inside of the turnover frame (15) is fixedly provided with a cavity (16), both ends of the turnover frame (15) are fixedly and continuously provided with inner shaft tubes (17), the peripheral surface of the two inner shaft tubes (17) is transmissionally connected with the main shaft (8) through a belt, the tail end of the two inner shaft tubes (17) is fixedly and continuously communicated with the cavity (16), the port of the air pump (4) is rotationally communicated with one inner shaft tube (17) through a pipeline, the peripheral surface of the two inner shaft tubes (17) is fixedly installed with rotary turnover frames (18), the surface of the two rotary turnover frames (18) is fixedly installed with winding assemblies (20), the opposite surfaces of the two winding assemblies (20) are wound with leather bodies (19), the peripheral surface of the two inner shaft tubes (17) is rotationally connected with outer rotary rings (21), the peripheral surface of the two outer rotary rings (21) is rotationally connected with the drying cylinder (2), the peripheral surface of the positive rotation shaft (11) and the reverse rotation shaft (12) is transmissionally connected with the two outer rotary rings (21), the inner wall of the two outer rotary rings (21) is fixedly installed with transmission bevel gears (22), the inner wall of the two transmission bevel gears (22) is transmissionally connected with the two winding assemblies (20); the winding assembly (20) comprises a support (28) fixedly connected with the rotary turnover frame (18), the inner wall of the support (28) is rotationally connected with a winding roller (29), the inside of the winding roller (29) is sequentially provided with a pressure charging cavity (30) and a drum pressure cavity (31) which are isolated from each other from outside to inside, the axis position of the winding roller (29) is rotationally connected with a transmission screw rod (35), the peripheral surface of the transmission screw rod (35) is transmissionally connected with a drum pressure piston (34) which is slidingly connected in the drum pressure cavity (31), the tail end of the winding roller (29) is fixedly installed with a linkage bevel gear (36), the peripheral surface of the linkage bevel gear (36) is engaged with the transmission bevel gear (22) at the adjacent position.

2. The box leather turn-dryer according to claim 1, wherein The inner wall of the turnover frame (15) is further fixedly provided with a tautening assembly matched with the leather body (19), the tautening assembly comprises two groups of symmetrically arranged elastic pressure members (23) and two groups of symmetrically arranged pneumatic push rods (24) respectively, the bottom end of each group of elastic pressure members (23) is fixedly provided with a driven pressure seat (25), the top end of each group of pneumatic push rods (24) is fixedly provided with a driving pressure seat (26), the inner wall of the driving pressure seat (26) and the driven pressure seat (25) is rotatably connected with a tautening roller (27) matched with the leather body (19), and the tail end of the pneumatic push rod (24) is fixedly communicated with the cavity (16).

3. The turn-dryer for bag leather according to claim 2, wherein The two groups of pneumatic push rods (24) are arranged between the two groups of elastic pressure members (23), and the driven pressure seat (25) is arranged below the driving pressure seat (26).

4. The turn-dryer for bag leather according to claim 3, wherein The elastic pressure member (23) comprises a vertically arranged damping telescopic pipe, the movable end of the damping telescopic pipe is fixedly connected with the driven pressure seat (25), and the circumferential surface of the damping telescopic pipe is sleeved with a compression spring.

5. The box leather turn-dryer according to claim 1, wherein The surface of the drying cylinder (2) is fixedly provided with an exhaust pipe communicated with the cloth air cavity (6), the inside of the exhaust pipe is fixedly provided with an air valve, and the axis of the hot air injection hole (7) is perpendicular to the axis of the drying cylinder (2).

6. The drying method of the box leather's turnover dryer according to claim 4, characterized in that, The method comprises the following steps: SS001, feeding: opening the sealing door (3), placing the rolled luggage leather on the roller (29) in the winding assembly (20) first, after placing, rotating the transmission screw (35) rotatably connected with the axis position of the roller (29), driving the drum pressure piston (34) to move axially along the drum pressure cavity (31), so that the roller (29) can tightly clamp the luggage leather roll; after the luggage leather roll is fixed, the other end of the leather body (19) is fixedly installed on the roller (29) in the other winding assembly (20), the leather body (19) passes through the tautening rollers (27) in the driven pressure seat (25) and the driving pressure seat (26) in sequence, and after the layout is completed, the sealing door (3) is closed; SS002, leather drying: the turnover motor (10) outputs the set parameter rotation speed, the rotation speed of the turnover motor (10) is controlled to control the turnover rate of the turnover frame (15); when the turnover motor (10) works, the servo motor (9) outputs the set parameter rotation speed, the output rotation speed of the servo motor (9) is set to set the unwinding speed of one roller (29) and the winding speed of the other roller (29); after the servo motor (9) works, the leather body (19) is driven to wind and unwind, and the output direction of the servo motor (9) changes in a set period, so as to change the drying surface of the leather back and forth; when the servo motor (9) works, the air pump (4) reciprocatingly pumps and charges air into the cavity (16) at a set frequency, the pneumatic push rod (24) reciprocates through repeated pumping and charging of the air pump (4), and the distance between the leather body (19) and the hot air injection hole (7) is changed back and forth after the pneumatic push rod (24) reciprocates, so as to change the heating intensity of the leather body (19) back and forth.

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