Leather processing equipment

Abstract

The present invention relates to the technical field of leather processing, and specifically to a leather processing device, comprising a box body, wherein threaded rods are symmetrically arranged on the upper and lower outer surfaces of the box body, and the threaded rods are rotatably connected to the box body through bearings, and penetrate the outer surface of the top end of the box body, and a circular gear is fixedly connected to the top end of the threaded rods, a support plate is threadedly connected to the outer surface of the threaded rods near the middle, and a motor is fixedly connected to the center position of the upper outer surface of the box body. The device structure can not only fix the leather well, so that the leather is distributed in a wave-shaped folded shape and is dyed with a certain space between each other, so that the dyeing of the leather is more uniform and beautiful with better effect, but also can automatically roll up the leather, which is highly practical. At the same time, the dye can be stirred while the leather is dyeing to prevent the precipitation of the pigment and the occurrence of uneven dyeing.

Description

Technical Field

[0001] The invention relates to the technical field of leather processing, in particular to leather processing equipment. Background Art

[0002] Leather is a denatured, non-perishable animal skin obtained through physical and chemical processing such as depilation and tanning. Leather is made of natural protein fibers woven tightly in three-dimensional space. Its surface has a special grain layer with natural grain and luster, and feels comfortable. The leather industry covers the main industries such as tanning, shoemaking, leather clothing, leather goods, fur and its products, as well as supporting industries such as leather chemicals, leather hardware, leather machinery, and accessories. It has a high degree of correlation between upstream and downstream, relies on market pull, and integrates the characteristics of earning foreign exchange, enriching the people, and providing employment;

[0003] Before being used by humans, leather often requires more complicated processing to greatly improve its practicality and aesthetics. Dyeing leather is an extremely important process. Dyeing leather into different colors greatly improves the aesthetics of leather products. The transmission leather dyeing process often involves soaking the leather in pigments of different colors and stirring the leather for dyeing. When dyeing a large area of ​​leather, the leather will be stacked together due to its large area, which will have a bad effect on the dyeing of the leather in the corresponding position, resulting in the disadvantage of uneven dyeing. Traditional leather dyeing processing equipment needs to be improved.

[0004] Therefore, a leather processing device is proposed. Summary of the invention

[0005] The object of the present invention is to provide a leather processing equipment to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a leather processing device, comprising a box body, wherein the upper and lower outer surfaces of the box body are symmetrically provided with threaded rods one, and the threaded rod one is rotatably connected to the box body through a bearing, and the threaded rod one passes through the outer surface of the top of the box body, and the top of the threaded rod one is fixedly connected with a circular gear one, and the outer surface of the threaded rod one is threadedly connected with a support plate near the middle;

[0007] A motor 1 is fixedly connected to the center position of the upper outer surface of the box body, a circular gear 2 is fixedly connected to the top end of the output shaft of the motor 1, and the circular gear 2 is transmission-connected to the circular gear 1 through a chain, a ventilation window is hinged symmetrically front and back near the upper position of the annular outer surface of the box body, and a fixing mechanism is fixedly connected to the upper outer surface of the support plate.

[0008] Preferably, the fixing mechanism comprises a housing, a slide groove, a second threaded rod, a slide rod, a slider, a connecting rod, a guide roller, and a clamping assembly;

[0009] The outer surface of the upper end of the support plate is fixedly connected to the shell, and the inner surface of the shell is symmetrically provided with sliding grooves on both sides. The inside of the sliding groove near the front end is rotatably connected to the second threaded rod through a bearing, and the inside of the sliding groove near the rear end is rotatably connected to the sliding rod through a bearing, and the sliders are respectively matched with the second threaded rod and the sliding rod, and a connecting rod is fixedly connected between the sliders on the same side, and the outer surface of the slider close to the center of the shell is rotatably connected to a guide roller, and clamping components are symmetrically arranged on the front and rear ends of the inner surface of the shell.

[0010] Preferably, the fixing mechanism further comprises a transmission rod 1, a motor 2, a bevel gear 1, a bevel gear 2, and a stopper;

[0011] The second threaded rod near the right side penetrates the outer surface of the upper end of the shell, and the top end of the threaded rod is fixedly connected to the second bevel gear. The inner surface of the box body is rotatably connected to the transmission rod one at the upper and lower ends near the second bevel gear through bearings, and the top end of the transmission rod one penetrates the box body, and the top end is fixedly connected to the second motor. The second motor is fixedly connected to the box body, the outer surface of the transmission rod one is fixedly connected to the first bevel gear near the second bevel gear, and the first bevel gear is meshed with the second bevel gear, and the front and rear ends of the annular outer surface of the guide roller are fixedly connected to blocks.

[0012] Preferably, the outer surfaces of the two groups of connecting rods on one side are equidistantly connected to a plurality of guide rollers, and the inner surfaces of the outer shell on both sides are equidistantly connected to a plurality of guide rollers near the bottom of the connecting rods, and the guide rollers are equidistantly staggered up and down.

[0013] Preferably, the annular outer surface of the guide roller is designed as a hollow structure.

[0014] Preferably, the clamping assembly comprises a bottom block and a top block, the front and rear ends of the inner surface of the shell are rotatably connected to the bottom block via a rotating shaft, and the top block is located above the bottom block, and the two are fixedly connected via bolts and nuts.

[0015] Preferably, movable grooves are provided on the left and right outer surfaces of the bottom block near the front, and transmission rod 2 is provided on both sides of the left and right sides of the bottom block, and transmission rod 2 matches the movable groove and is rotatably connected to the outer shell through a bearing, the transmission rod 2 near the right side penetrates the outer shell, and a bevel gear 3 is fixedly connected to its right end, and a bevel gear 4 is fixedly connected to the position of the outer surface of the transmission rod 1 corresponding to the bevel gear 3, and the bevel gear 4 is meshingly connected with the bevel gear 3.

[0016] Preferably, the vertical cross-sections of the second transmission rod and the movable groove are both designed as square structures, and the two are matched with each other and slidably connected.

[0017] Preferably, a baffle is slidably connected to the outer surface of the second transmission rod near the left side, and a spring is sleeved at a position between the baffle and the outer shell on the outer surface of the second transmission rod.

[0018] Preferably, the bottom end of the threaded rod 2 passes through the outer shell and the support plate, and is fixedly connected to a bevel gear 5 at its bottom end, and a bevel gear 6 is fixedly connected to the annular outer surface of the transmission rod 1 near the bottom end.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By adding a fixing mechanism to the device, the leather can be well fixed, so that the leather is distributed in a wave-shaped folded shape, and a certain space is separated from each other for dyeing, so that the leather dyeing is more uniform and beautiful, the effect is better, and the leather can be automatically rolled up, which is highly practical;

[0021] 2. By adding a series of structural components such as stirring blades and circular gears to the device, the dye can be stirred while the leather is dyed, preventing the pigment from precipitating and causing uneven dyeing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is the overall structural view of the present invention;

[0024] Figure 2 It is a cross-sectional view of the combination of the box body and the shell of the present invention;

[0025] Figure 3 is a right side cross-sectional view of the housing of the present invention;

[0026] Figure 4 For the present invention Figure 2 Middle AA section view;

[0027] Figure 5 For the present invention Figure 2 Enlarged view at B in the middle;

[0028] Figure 6 For the present invention Figure 2 Enlarged view at center C;

[0029] Figure 7 It is a cross-sectional view of the combination of the slide groove and the slider of the present invention;

[0030] Figure 8 A cross-sectional view of a guide roller.

[0031] Description of reference numerals:

[0032] 1. Box body; 2. Threaded rod 1; 21. Circular gear 1; 22. Support plate; 23. Motor 1; 24. Circular gear 2; 3. Ventilation window; 4. Fixing mechanism; 41. Housing; 42. Slide groove; 43. Threaded rod 2; 44. Slide rod; 45. Sliding block; 46. Connecting rod; 47. Guide roller; 48. Transmission rod 1; 49. Motor 2; 410. Bevel gear 1; 411. Bevel gear 2; 412. Stop block; 5. Clamping assembly; 51. Bottom block; 52. Top block; 6. Movable groove; 61. Transmission rod 2; 62. Bevel gear 3; 63. Bevel gear 4; 7. Baffle; 71. Spring; 81. Bevel gear 5; 82. Bevel gear 6. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figures 1 to 8 , the present invention provides a technical solution:

[0035] A leather processing device comprises a box body 1, wherein the upper and lower outer surfaces of the box body 1 are symmetrically provided with threaded rods 2, and the threaded rods 2 are rotatably connected to the box body 1 through bearings, and the threaded rods 2 pass through the outer surface of the top of the box body 1, and the top of the threaded rods 2 is fixedly connected with a circular gear 21, and the outer surface of the threaded rods 2 is threadedly connected with a support plate 22 near the middle;

[0036] A motor 23 is fixedly connected to the center position of the upper outer surface of the box body 1, and a circular gear 24 is fixedly connected to the top of the output shaft of the motor 23, and the circular gear 24 is transmission-connected to the circular gear 21 through a chain. A ventilation window 3 is symmetrically hinged on the annular outer surface of the box body 1 near the top, and a fixing mechanism 4 is fixedly connected to the upper outer surface of the support plate 22.

[0037] By adopting the above technical scheme, when working, the device as a whole is fixed on the ground with a certain angle tilted to the right, the ventilation window 3 is opened, the leather is fixed with the fixing mechanism 4, and the ventilation window 3 is closed to prevent dust from entering the interior of the box 1, and the motor 1 23 is controlled to rotate, driving the circular gear 2 24 to rotate, and the circular gear 1 21 is driven to rotate through the chain, thereby driving the threaded rod 1 2 to rotate. Since the threaded rod 1 2 is threadedly connected with the support plate 22, the support plate 22 will drive the fixing mechanism 4 to move downward to immerse the leather in the dye. After the leather is successfully dyed, the fixing mechanism 4 is controlled to move up to the original position to air-dry the leather to completely complete the dyeing work. The fixing mechanism 4 can be controlled to automatically retract the leather, which greatly improves the practicality of the device and reduces the labor intensity of the staff.

[0038] As an embodiment of the present invention, Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, the fixing mechanism 4 includes a shell 41, a slide groove 42, a threaded rod 243, a slide rod 44, a slider 45, a connecting rod 46, a guide roller 47, and a clamping assembly 5. The outer surface of the upper end of the support plate 22 is fixedly connected to the shell 41, and the inner surface of the shell 41 is symmetrically provided with slide grooves 42 on both sides. The inside of the slide groove 42 near the front end is rotatably connected to the threaded rod 243 through a bearing, and the inside of the slide groove 42 near the rear end is rotatably connected to the slide rod 44 through a bearing, and the slider 45 is matched with the threaded rod 243 and the slide rod 44 respectively, and a connecting rod 46 is fixedly connected between the sliders 45 on the same side. The outer surface of the slider 45 near the center of the shell 41 is rotatably connected to the guide roller 47, and the clamping assembly 5 is symmetrically arranged at the front and rear ends of the inner surface of the shell 41. The fixing mechanism 4 also includes a transmission rod 1 48, a motor 2 49, a bevel gear 1 410, a bevel gear 2 411, and a stopper 412. The threaded rod 2 43 near the right side is rotatably connected to the guide roller 47. The outer surface of the upper end of the shell 41 is penetrated, and a bevel gear 2 411 is fixedly connected to its top. The upper and lower ends of the inner surface of the box body 1 are rotatably connected with a transmission rod 1 48 through bearings near the bevel gear 2 411, and the top of the transmission rod 1 48 passes through the box body 1, and a motor 2 49 is fixedly connected to the top of the transmission rod 1 48. The motor 2 49 is fixedly connected to the box body 1, and the outer surface of the transmission rod 1 48 is fixedly connected with a bevel gear 1 410 near the bevel gear 2 411, and the bevel gear 1 410 is meshingly connected with the bevel gear 2 411. The front and rear ends of the annular outer surface of the guide roller 47 are fixedly connected with a stopper 412, and the outer surfaces of the two groups of connecting rods 46 on the opposite sides are equidistantly rotatably connected with a plurality of guide rollers 47, and the inner surface of the shell 41 on the left and right sides near the bottom of the connecting rod 46 are equidistantly rotatably connected with a plurality of guide rollers 47, and the guide rollers 47 are equidistantly staggered and distributed up and down, and the annular outer surface of the guide roller 47 is a hollow structure design.

[0039] By adopting the above technical solution, the leather is passed from the front to between the upper and lower guide rollers 47 to the rear, and the clamping assembly 5 near the rear is controlled to clamp and fix one end of the leather, and the motor 2 49 is controlled to rotate, which drives the bevel gear 1 410 to rotate, which will drive the bevel gear 2 411 to rotate, and then drive the threaded rod 2 43 to rotate. The threaded rod 2 43 is threadedly connected to the slider 45, which will drive the slider 45 to move downward, thereby driving the upper several groups of guide rollers 47 to move downward through the connecting rod 46, squeezing the leather, and moving downward from the lower several groups of guide rollers 47, automatically wrapping the leather around the guide rollers 47, so that the leather is distributed in a wavy structure, so that a certain gap is maintained between adjacent leathers, which is conducive to full contact between the dye and the outer surface of the leather, until the slider 45 moves to the bottom When the leather is dried, the other end of the leather is clamped and fixed by the clamping assembly 5 near the front, so that the leather can be fixed, which is beneficial to its dyeing. By arranging blocks 412 at the front and rear ends of the guide roller 47, it can be ensured that the leather will not deviate to the two sides of the guide roller 47, and the annular outer surface of the guide roller 47 is a hollow structure design, which greatly reduces the contact area with the leather, which is beneficial to the full contact between the dye and the leather and reduces the influence on the dyeing color of the leather. At the same time, when the leather is air-dried in the later stage, since the device as a whole is installed at a certain angle to the right, the guide roller 47 located inside the device is distributed in a manner of tilting at a certain angle to the right, which is beneficial for the dye flowing to the lower place to flow from high to low along the hollow groove on the lower guide roller 47, and will not accumulate at the bottom of the leather to affect the color of the leather.

[0040] As an embodiment of the present invention, Figure 5 As shown, the clamping assembly 5 includes a bottom block 51 and a top block 52. The front and rear ends of the inner surface of the housing 41 are rotatably connected to the bottom block 51 via a rotating shaft, and the top block 52 is located above the bottom block 51, and the two are fixedly connected by bolts and nuts.

[0041] By adopting the above technical solution, the user can rotate the nut to separate the top block 52 and the bottom block 51, put one end of the leather between the two, and tighten the nut to clamp and fix the leather, with good clamping effect and easy disassembly and installation.

[0042] As an embodiment of the present invention, Figure 6 As shown, movable grooves 6 are provided on the left and right outer surfaces of the bottom block 51 near the front, and transmission rods 61 are provided on the left and right sides of the bottom block 51, and the transmission rods 61 match the movable grooves 6 and are rotatably connected to the outer shell 41 through bearings, the transmission rod 61 near the right side passes through the outer shell 41, and a bevel gear 3 62 is fixedly connected to its right end, and a bevel gear 4 63 is fixedly connected to the position of the outer surface of the transmission rod 1 48 corresponding to the bevel gear 3 62, and the bevel gear 4 63 is meshingly connected with the bevel gear 3 62.

[0043] By adopting the above technical scheme, when dyeing is completed, the support plate 22 is controlled to move upward, thereby driving the bevel gear 2 411 and the bevel gear 3 62 to move upward, and the two stop moving after they are respectively meshed with the bevel gear 1 410 and the bevel gear 4 63. After the leather is dried, the rear clamping assembly 5 is opened, the motor 2 49 is controlled to reverse, and the threaded rod 2 43 is driven to rotate through a series of structural components such as the transmission rod 1 48 and the bevel gear 1 410, thereby driving the slider 45 to move upward. At the same time, the rotating transmission rod 1 48 drives the bevel gear 4 63 to rotate. Since the bevel gear 4 63 and the bevel gear 3 62 are meshed with each other, the bevel gear 3 62 will be driven to rotate. Then, the clamping assembly 5 near the front can be driven by the transmission rod 2 61 to rotate to retract the leather. No manual operation is required, which greatly reduces the labor intensity of the staff and improves work efficiency.

[0044] As an embodiment of the present invention, Figure 5 and Figure 6 As shown, the vertical cross-sections of the transmission rod 2 61 and the movable groove 6 are both designed as square structures, and the two are matched with each other and slidably connected. The outer surface of the transmission rod 2 61 near the left side is slidably connected with a baffle 7, and the outer surface of the transmission rod 2 61 near the position between the baffle 7 and the outer shell 41 is sleeved with a spring 71.

[0045] By adopting the above technical scheme, the transmission rod 2 61 and the movable groove 6 can match and engage with each other, and during the rotation of the transmission rod 2 61, the clamping assembly 5 can be driven to retract the leather. Under the action of the spring 71, it can reach the baffle 7 in the direction of the center of the shell 41, and under the joint action of the limit block on the right transmission rod 2 61, the clamping assembly 5 can be clamped and fixed. After the retraction is completed, the user can hold the clamping assembly 5 and control it to move to the left, which will squeeze the baffle 7 and make it move to the left along the transmission rod 2 61 to squeeze the spring 71. When the movable groove 6 on the right outer surface of the bottom block 51 is disengaged from the right transmission rod 2 61, the leather retracted by the clamping assembly 5 can be taken out, which greatly facilitates the user to collect the leather and improves work efficiency.

[0046] As an embodiment of the present invention, Figure 2 and Figure 3 As shown, the bottom end of the threaded rod 2 43 passes through the housing 41 and the support plate 22, and a bevel gear 5 81 is fixedly connected to the bottom end thereof, and a bevel gear 6 82 is fixedly connected to the annular outer surface of the transmission rod 1 48 near the bottom end.

[0047] By adopting the above technical scheme, when the fixing mechanism 4 moves downward and immerses the leather in the dye, the bevel gear five 81 follows and moves downward until it moves downward to mesh with the bevel gear six 82. At this time, the leather is completely immersed in the dye for dyeing. By controlling the motor two 49 to rotate, the bevel gear six 82 can be driven to rotate through the transmission rod one 48, and then the bevel gear five 81 can be driven to rotate, thereby driving the threaded rod two 43 to rotate, driving the slider 45 to move inside the slide groove 42, and then driving the guide roller 47 fixedly connected to the connecting rod 46 to move vertically. The motor two 49 is controlled to rotate forward and reverse, so that the guide roller 47 near the bottom can be driven to move back and forth up and down within a certain range, so as to achieve the effect of loosening the leather and tightening the leather. When loosening the leather, the leather can be more fully contacted with the dye to prevent the contact part between the guide roller 47 and the leather from having a poor dyeing effect. At the same time, the leather can be driven to stir the dye while reciprocatingly loosening and tightening the leather, so that the dye is mixed more evenly, which is conducive to more uniform and beautiful dyeing of the leather.

[0048] Working principle: When working, the device is fixed on the ground with a certain angle tilted to the right. The ventilation window 3 is opened, and the leather is passed from the front to between the upper and lower guide rollers 47 to the rear. The clamping assembly 5 near the rear is controlled to clamp and fix one end of the leather. The user can separate the top block 52 and the bottom block 51 from each other by rotating the nut, put one end of the leather between the two, and tighten the nut to clamp and fix the leather. The control motor 2 49 rotates, driving the bevel gear 1 410 to rotate, which will drive the bevel gear 2 411 to rotate, and then drive the threaded rod 2 43 to rotate. The threaded rod 2 43 is threadedly connected to the slider 45, which will drive the slider 45 to move downward, thereby driving the upper several groups of guide rollers 47 to move downward through the connecting rod 46, squeezing The leather moves downward from between several groups of guide rollers 47 below, and automatically wraps the leather around the guide rollers 47, so that the leather is distributed in a wavy structure, so that a certain gap is maintained between adjacent leathers, which is conducive to the full contact between the dye and the outer surface of the leather. When the slider 45 moves to the bottom, the other end of the leather is clamped and fixed by the clamping component 5 close to the front, so that the leather can be fixed, which is conducive to dyeing. By arranging blocks 412 at the front and rear ends of the guide roller 47, it can be ensured that the leather will not deviate to the two sides of the guide roller 47, and the annular outer surface of the guide roller 47 is a hollow structure design, which greatly reduces the contact area with the leather, which is conducive to the full contact between the dye and the leather, reducing the influence on the dyeing color of the leather, and at the same time, when the leather is air-dried in the later stage Since the device as a whole is installed at a certain angle tilted to the right, the guide roller 47 located inside the device is distributed at a certain angle tilted to the right, which is conducive to the dye flowing to the lower part to flow from the high place to the low place along the hollow groove on the lower guide roller 47, and will not accumulate at the bottom of the leather to affect the leather color. Close the ventilation window 3 to prevent dust from entering the box body 1, control the motor 1 23 to rotate, drive the circular gear 24 to rotate, and drive the circular gear 1 21 to rotate through the chain, thereby driving the threaded rod 1 2 to rotate. Since the threaded rod 1 2 is threadedly connected to the support plate 22, it will drive the support plate 22 to drive the fixing mechanism 4 to move downward. When the leather is immersed in the dye, the bevel gear 5 81 follows and moves downward until it moves downward to mesh with the bevel gear 6 82. The leather is completely immersed in the dye for dyeing. The motor 2 49 is controlled to rotate, which can drive the bevel gear 6 82 to rotate through the transmission rod 1 48, and then drive the bevel gear 5 81 to rotate, thereby driving the threaded rod 2 43 to rotate, driving the slider 45 to move inside the slide groove 42, and then driving the guide roller 47 fixedly connected to the connecting rod 46 to move vertically. The motor 2 49 is controlled to rotate forward and reverse, so that the guide roller 47 near the bottom can be driven to move up and down reciprocatingly within a certain range, so as to achieve the effect of loosening the leather and tightening the leather. When loosening the leather, the leather can be more fully contacted with the dye to prevent the contact part between the guide roller 47 and the leather from having a poor dyeing effect. At the same time, the leather can be driven to stir the dye while reciprocatingly loosening and tightening the leather.The dye is mixed more evenly, which is conducive to more uniform and beautiful leather dyeing. When dyeing is completed, stop motor 249, control support plate 22 to move upward, and then drive bevel gear 2411 and bevel gear 362 to move upward until they are respectively engaged with bevel gear 1410 and bevel gear 463 and then stop moving. After the leather is dried, open the rear clamping assembly 5, control motor 249 to reverse, and drive threaded rod 243 to rotate through a series of structural components such as transmission rod 148 and bevel gear 1410, thereby driving slider 45 to move upward. At the same time, the rotating transmission rod 148 drives bevel gear 463 to rotate. When the bevel gear 4 63 and the bevel gear 3 62 are meshed with each other, the bevel gear 3 62 will be driven to rotate, and the clamping assembly 5 near the front can be driven to rotate through the transmission rod 2 61 to roll up the leather. No manual operation is required, which greatly reduces the labor intensity of the staff. After the rolling is completed, the user can hold the clamping assembly 5 and control it to move to the left, which will squeeze the baffle 7 to move it to the left along the transmission rod 2 61 to squeeze the spring 71. When the movable groove 6 on the right outer surface of the bottom block 51 is separated from the right transmission rod 2 61, the leather rolled up by the clamping assembly 5 can be taken out, which greatly facilitates the user to collect the leather and has high work efficiency.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A leather processing device, comprising a housing (1), characterized in that: The outer surfaces of the upper and lower ends of the box body (1) are symmetrically provided with threaded rods (2), and the threaded rods (2) are rotatably connected to the box body (1) through bearings, and penetrate the outer surface of the top end of the box body (1), and the top end is fixedly connected to a circular gear (21), and the outer surface of the threaded rod (2) is threadedly connected to a support plate (22) near the middle; A motor 1 (23) is fixedly connected to the center of the upper outer surface of the box body (1), a circular gear 2 (24) is fixedly connected to the top of the output shaft of the motor 1 (23), and the circular gear 2 (24) is transmission-connected to the circular gear 1 (21) via a chain, a ventilation window (3) is hingedly connected symmetrically front and back to the annular outer surface of the box body (1) near the top, and a fixing mechanism (4) is fixedly connected to the upper outer surface of the support plate (22); The fixing mechanism (4) comprises a housing (41), a slide groove (42), a second threaded rod (43), a slide rod (44), a slider (45), a connecting rod (46), a guide roller (47), and a clamping assembly (5); The outer surface of the upper end of the support plate (22) is fixedly connected to a shell (41), and the inner surface of the shell (41) is symmetrically provided with slide grooves (42) on both sides, and the inner surface of the shell (41) is symmetrically provided with slide grooves (42). The inner surface of the slide groove (42) near the front end is rotatably connected to a second threaded rod (43) through a bearing, and the inner surface of the slide groove (42) near the rear end is rotatably connected to a slide rod (44) through a bearing, and the slider (45) is matched with the second threaded rod (43) and the slide rod (44) respectively. A connecting rod (46) is fixedly connected between the sliders (45) on the same side. The outer surface of the slider (45) near the center of the shell (41) is rotatably connected to a guide roller (47), and the inner surface of the shell (41) is symmetrically provided with clamping components (5) at both ends; the fixing mechanism (4) also includes a transmission rod (48), a second motor (49), a first bevel gear (410), a second bevel gear (411), and a stopper (412); The second threaded rod (43) near the right side passes through the outer surface of the upper end of the shell (41), and the top end thereof is fixedly connected to the second bevel gear (411). The inner surface of the housing (1) is rotatably connected to the first transmission rod (48) at the upper and lower ends near the second bevel gear (411) through bearings, and the top end of the first transmission rod (48) passes through the housing (1), and the top end is fixedly connected to the second motor (49), and the second motor (49) is fixedly connected to the housing (1). The outer surface of the first transmission rod (48) is fixedly connected to the first bevel gear (410) at a position near the second bevel gear (411), and the first bevel gear (410) is meshingly connected to the second bevel gear (411). The front and rear ends of the annular outer surface of the guide roller (47) are fixedly connected to stoppers (412); by arranging the stoppers (412) at the front and rear ends of the guide roller (47), it can be ensured that the leather will not deviate to the two sides of the guide roller (47); The outer surfaces of the two groups of connecting rods (46) on opposite sides are equidistantly connected to a plurality of guide rollers (47), and the inner surfaces of the housing (41) on both sides near the bottom of the connecting rods (46) are equidistantly connected to a plurality of guide rollers (47), and the guide rollers (47) are staggered and equidistantly distributed up and down; The clamping assembly (5) comprises a bottom block (51) and a top block (52); the bottom block (51) is rotatably connected to the front and rear ends of the inner surface of the housing (41) via a rotating shaft, and the top block (52) is located above the bottom block (51), and the two are fixedly connected via bolts and nuts; The left and right outer surfaces of the bottom block (51) near the front are provided with movable grooves (6), and the left and right sides of the bottom block (51) are provided with transmission rods (61), and the transmission rods (61) match the movable grooves (6) and are rotatably connected to the housing (41) through bearings. The transmission rods (61) near the right side penetrate the housing (41), and the right end thereof is fixedly connected to a bevel gear (62). The outer surface of the transmission rod (48) is fixedly connected to a bevel gear (63) at a position corresponding to the bevel gear (62), and the bevel gear (63) is meshingly connected to the bevel gear (62). The outer surface of the second transmission rod (61) near the left side is slidably connected with a baffle (7), and the outer surface of the second transmission rod (61) near the position between the baffle (7) and the housing (41) is sleeved with a spring (71); The bottom end of the threaded rod 2 (43) passes through the housing (41) and the support plate (22), and is fixedly connected to a bevel gear 5 (81) at its bottom end, and a bevel gear 6 (82) is fixedly connected to the annular outer surface of the transmission rod 1 (48) near the bottom end; The box (1) is fixedly installed on the ground at a certain angle to the right, the ventilation window (3) is opened, and the leather is passed from the front to between the upper and lower guide rollers (47) to the rear, and the clamping assembly (5) near the rear is controlled to clamp and fix one end of the leather, and the second motor (49) is controlled to rotate to drive the slider (45) to move downward, thereby driving the upper plurality of guide rollers (47) to move downward through the connecting rod (46), squeezing the leather, and automatically wrapping the leather around the guide rollers (47), so that the leather is distributed in a wave-shaped structure, and a certain gap is maintained between adjacent leathers. When the slider (45) moves to the bottom, the other end of the leather is clamped and fixed by the clamping assembly (5) near the front; Controlling the second motor (49) to rotate forward and reverse, driving the guide roller (47) near the bottom to move up and down reciprocatingly within a certain range, reciprocatingly loosening and tightening the leather, and driving the leather to stir the dye at the same time; The second motor (49) is controlled to rotate in the reverse direction, and the threaded rod (43) is driven to rotate through the series of structural components of the transmission rod (48) and the bevel gear (410), thereby driving the slider (45) to move upward. At the same time, the rotating transmission rod (48) drives the bevel gear (63) to rotate. Since the bevel gear (63) and the bevel gear (62) are meshed with each other, the bevel gear (62) is driven to rotate, and the clamping assembly (5) near the front can be driven to rotate through the transmission rod (61) to retract the leather; The annular outer surface of the guide roller (47) is designed as a hollow structure; the contact area with the leather is greatly reduced, which is conducive to the full contact between the dyeing liquid and the leather, and reduces the influence on the dyeing color of the leather. At the same time, when the leather is air-dried in the later stage, since the whole device is installed at a certain angle to the right, the guide roller (47) located inside the device is distributed in a manner of tilting to the right at a certain angle, which is conducive to the dye flowing to the lower part to flow from the high place to the lower part along the hollow groove on the lower guide roller (47), and will not accumulate at the bottom of the leather to affect the leather color. The vertical cross-sections of the second transmission rod (61) and the movable groove (6) are both designed as square structures, and the two are matched with each other and slidably connected.

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