Edge folding adjusting assembly of bag folding device

Abstract

The utility model discloses an edge folding adjusting assembly of a bag folding device, which comprises a liftable mounting top plate, a third motor is arranged on the mounting top plate, and a power output shaft of the third motor is connected with a rotating gear; a first rack and a second rack which can move horizontally are arranged above the mounting top plate, and the rotating gear is located between the first rack and the second rack and engaged with the first rack and the second rack; a left connecting plate and a right connecting plate which can slide horizontally are arranged below the mounting top plate, the first rack is connected with the left connecting plate, and the second rack is connected with the right connecting plate. According to the edge folding adjusting assembly, the first rack and the second rack are driven by the third motor to move oppositely, the working distance between the edge folding assemblies on the two sides can be automatically adjusted, the machining requirements of kangaroo bags of different models are met, the manual operation time is shortened, and the bag folding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clothing sewing equipment, in particular to an edge folding adjustment component of a bag folding device. Background Art

[0002] In conventional clothing designs, pockets are mostly placed on the sides of the clothing, so it is difficult to detect if something falls out. However, the pockets of a sweatshirt are placed on the front. Compared with pockets on the sides of the clothing, pockets on the front have a larger storage capacity. Whether it is a wallet or a mobile phone, it can be placed in the front pocket of the sweatshirt and is not easy to fall out. Since the large front pocket on the sweatshirt and the kangaroo pocket have the same purpose, the industry calls the large pocket on the front of the sweatshirt a kangaroo pocket.

[0003] The invention patent with patent number 202020219085.3 discloses a kangaroo bag sewing device, a workbench assembly and a sewing assembly. The workbench assembly includes a frame and a workbench plate. The workbench plate is horizontally fixed on the frame. The sewing assembly is arranged on the right part of the frame. Its structural features are: including a folding assembly, a folding drive device, a bag-shaped plate assembly, a bag-shaped plate drive device, a pressing frame device and a pressing frame drive device. The folding assembly cooperates with the bag-shaped plate assembly to fold the pocket fabric. The folding drive device drives the folding assembly to move up and down, and the bag-shaped plate drive device drives the bag-shaped plate assembly to move up and down, front and back. The pressing frame device is used to deliver the folded pocket fabric and the body fabric to the sewing assembly for sewing, and the pressing frame drive device drives the pressing frame device to move up and down, front and back, left and right. There are certain defects in the content disclosed in this patent. The folding component of the equipment only presets a set of bag folding model solutions for bag folding. When folding kangaroo bags of different models, additional manual operations are required to complete the bag folding, which reduces the bag folding efficiency. Summary of the invention

[0004] In view of the above technical problems, the utility model provides a folding adjustment component of a bag folding device, which can automatically adjust the working distance between the folding components on both sides to meet the processing requirements of kangaroo bags of different models.

[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a folding edge adjustment component of a bag folding device, including a lifting mounting top plate, the mounting top plate is provided with a third motor, and the power output shaft of the third motor is connected to the rotating gear; a first rack and a second rack that can move horizontally are provided above the mounting top plate, and the rotating gear is located between the first rack and the second rack and meshes with each other respectively; a left connecting plate and a right connecting plate that can slide horizontally are provided below the mounting top plate, the first rack is connected to the left connecting plate, and the second rack is connected to the right connecting plate.

[0006] In order to optimize the above technical solution, the utility model also includes the following improved technical solution.

[0007] One side of the installation top plate is slidably installed on the first lifting vertical plate through the third guide rail, and the first lifting vertical plate is provided with a first motor for driving the installation top plate to slide.

[0008] The driving rod of the first motor is connected to the first driving wheel, and the first driven wheel is installed at the other end of the first lifting vertical plate; the first conveyor belt is installed on the first driving wheel and the first driven wheel, and is connected to the mounting top plate through the first clip.

[0009] A guide shaft is fixed on the other side of the mounting top plate, a linear bearing is mounted on the second lifting vertical plate, and the guide shaft is slidably mounted in the linear bearing.

[0010] The first lifting plate is slidably mounted on the left mounting plate, the second lifting plate is slidably mounted on the right mounting plate, and a first lifting cylinder for driving the first lifting plate to move upward and downward is provided between the first lifting plate and the left mounting plate.

[0011] Compared with the prior art, the folding adjustment assembly of the utility model can automatically adjust the working distance of the folding assemblies on both sides by driving the first rack and the second rack to move toward each other through the third motor, adapt to the processing requirements of different types of kangaroo bags, reduce manual operation time, and improve bag folding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment.

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure from another viewing angle of this embodiment.

[0014] Figure 3 It is a planed surface schematic diagram of the present embodiment.

[0015] Figure 4 It is a three-dimensional structural schematic diagram of the folding component.

[0016] Figure 5 It is a schematic diagram of the three-dimensional structure of the angle adjustment component and the folding component.

[0017] Figure 6 It is a rear view of this embodiment in coordination with the overall device. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings.

[0019] Figures 1 to 6 Shown is a schematic structural diagram of the utility model.

[0020] The accompanying drawings are marked as follows: a first lifting cylinder 1, a first lifting cylinder mounting frame 2, a first lifting cylinder joint 3, a first lifting vertical plate 4, a first guide rail 5, a second guide rail 6, a first slider 7, a second lifting vertical plate 8, a left mounting plate 9, a right mounting plate 10, a top mounting plate 11, a first motor 12, a first motor mounting plate 13, a first conveyor belt 14, a first driving wheel 15, a first driven wheel 16, a first clamp 17, a third guide rail 18, a third motor 19, a third motor mounting frame 20, a fourth guide rail 21, a fifth guide rail 22, a guide Axis 23, guide shaft mounting frame 24, linear bearing 25, driving gear 26, driven gear 27, rotating rod 28, rotating gear 29, first rack 30, second rack 31, left slide 32, right slide 33, fixed block 34, fixed plate 35, left connecting plate 36, left slide rail 38, right slide rail 39, translation slider 40, left folding cylinder 41, front folding cylinder 42, left folding cylinder joint 43, front folding cylinder joint 44, left folding plate 45, front folding plate 46, left vertical plate 47, front vertical plate 48, left pressure plate 49, front pressure plate 50 , left rotating motor 51, right rotating motor 52, left rotating motor bottom plate 53, curved groove 54, first crank 55, second crank 56, first telescopic cylinder 57, fisheye joint 58, first connecting piece 59, second connecting piece 60, first connecting shaft 61, second connecting shaft 62, left rotating motor bracket 63, cloth supporting mounting plate 64, left cloth supporting plate 65, right cloth supporting plate 66, front cloth supporting plate 67, left supporting cylinder 68, right supporting cylinder 69, left supporting cylinder connecting block 70, right supporting cylinder connecting block 71, second motor 72, front fixed bottom plate 73, rear fixed base plate 74, second conveyor belt 75, second driving wheel 76, second driven wheel 77, second clamp 78, left connecting block 79, right connecting block 80, movable plate 81, transmission plate 82, sixth guide rail mounting plate 83, seventh guide rail mounting plate 84, sixth guide rail 85, seventh guide rail 86, sensor 87, second lifting cylinder 88, second lifting cylinder mounting frame 89, second lifting cylinder joint 90, mounting base plate 91, third lifting vertical plate 92, fourth lifting vertical plate 93, eighth guide rail 94, lifting connecting piece 95.

[0021] The kangaroo bag folding device of the utility model comprises an edge folding component, an edge folding adjustment component, an angle adjustment component, a cloth support component, and a cloth support driving component. The angle adjustment component adjusts the angles of the left cloth support plate 65 and the right cloth support plate 66 to meet the requirements of different bag folding models, and the edge folding component cooperates with the cloth support component to fold the pocket fabric on the cloth support plate.

[0022] like Figure 1 and Figure 2As shown, the folding adjustment assembly includes a first lifting cylinder 1, a first lifting plate 4, a second lifting plate 8, a mounting top plate 11, a first motor 12, a first conveyor belt 14, a third motor 19, a first rack 30, a second rack 31, a rotating gear 29, a fixed block 34, a fixed plate 35, a left connecting plate 36, and a right connecting plate. The mounting left plate 9 is in a "U" shape, and the first guide rail 5 and the second guide rail 6 are vertically mounted on the right side of the mounting left plate 9. The first slider 7 and the second slider 8 are mounted on the left side of the first lifting plate 4 to cooperate with the first guide rail 5 and the second guide rail 6, and the first lifting plate 4 moves vertically along the first guide rail 5 and the second guide rail 6. Above the middle recessed area of ​​the mounting left plate 9, the first lifting cylinder 1 is vertically mounted in the middle of the left side of the first lifting plate 4 through the first lifting cylinder mounting frame 2, and the telescopic rod of the first lifting cylinder 1 is downwardly connected to the upper end of the first lifting cylinder joint 3, and the lower end of the first lifting cylinder joint 3 is fixedly mounted on the left side of the third lifting plate 92.

[0023] The first motor 12 is vertically mounted on the rear end of the right side of the first lifting plate 4 through the first motor mounting plate 13. The transmission rod of the first motor 12 is upwardly connected to the first driving wheel 15. The first driven wheel 16 is mounted on the front end of the right side of the first lifting plate 4. The first conveyor belt 14 is meshed and connected with the first driving wheel 15 and the first driven wheel 16. The first clamp 17 is fixedly mounted on the left side of the mounting top plate 11. The first clamp 17 vertically clamps the first conveyor belt. The third guide rail 18 is horizontally mounted on the right side of the first lifting plate 4. The third slider is mounted on the left side of the first clamp 17 to cooperate with the third guide rail 18. The first clamp 17 drives the left side of the mounting top plate 11 to move horizontally along the third guide rail 18.

[0024] The fourth guide rail 21 and the fifth guide rail 22 are vertically installed on the left side of the right installation plate 10, and the fourth slider and the fifth slider are installed on the right side of the second lifting plate 8 to cooperate with the fourth guide rail 21 and the fifth guide rail 22, and the second lifting plate 8 moves vertically along the fourth guide rail 21 and the fifth guide rail 22. The guide shaft 23 is horizontally installed on the right side of the installation top plate 11 through the guide shaft mounting frame 24, and the linear bearing 25 passes through the guide shaft 23 and is fixed on the left side of the second lifting plate 8. The linear bearing 25 rotates with the guide shaft 23, and the second lifting plate 8 moves horizontally along the direction of the guide shaft 23.

[0025] The first motor 12 drives the first conveyor belt 14 to rotate, and the first clamping piece 17 on the first conveyor belt 14 drives the left end of the mounting top plate 11 to move horizontally along the third guide rail 18, and the right end of the mounting top plate 11 moves horizontally along the guide shaft 23. The telescopic rod of the first telescopic cylinder 57 retracts, and the first lifting plate 4 moves downward relative to the left mounting plate 9, and the first lifting plate 4 drives the mounting top plate 11 to move downward, and the mounting top plate 11 drives the second lifting plate 8 to move downward, completing the first descending action.

[0026] The third motor 19 is horizontally mounted on the mounting top plate 11 through the third motor mounting bracket 20. The transmission rod of the third motor 19 is connected to the driving gear 26 in front. The rotating rod 28 is fixedly connected to the driven gear 27 and is vertically mounted in front of the driving gear 26. The driving gear 26 and the driven gear 27 are vertically meshed. The third motor 19 drives the driving gear 26 to rotate, the driving gear 26 drives the driven gear 27 to rotate, and the driven gear 27 drives the rotating rod 28 to rotate. The rotating gear 29 is fixedly mounted at the lower end of the rotating rod 28, and the rotating rod 28 drives the rotating gear 29 to rotate.

[0027] A first rack 30 and a second rack 31 that can move horizontally are provided above the top plate 11. The rotating gear 29 is meshed with the first rack 30 and the second rack 31. The rotating gear 29 drives the first rack 30 and the second rack 31 to move horizontally toward each other. A left slide 32 and a right slide 33 are provided on the top plate 11. The first rack 30 is connected to the left connecting plate 36 through two fixed blocks 34, and the second rack 31 is connected to the right connecting plate through a fixed plate 35. The upper ends of the two fixed blocks 34 are connected to the first rack 30, and the lower ends of the fixed blocks 34 pass through the left slide 32 and are fixedly connected to the left connecting plate 36. The fixed plate 35 is "L" shaped, and the horizontal part of the fixed plate 35 is fixedly connected to the second rack 31, and the vertical part of the fixed plate 35 passes through the right slide 33 and is fixedly connected to the right connecting plate. The first rack 30 moves to the right, the two fixed blocks 34 move to the right in the left slide 32, and the left connecting plate 36 moves to the right. The second rack 31 moves to the left, the vertical portion of the fixing plate 35 moves to the left in the right sliding groove 33, and the right connecting plate moves to the left.

[0028] like Figure 3 As shown, a left slide rail 38 and a right slide rail 39 are installed on the lower surface of the top plate 11, and two translation sliders 40 are installed on the upper surfaces of the left connecting plate 36 and the right connecting plate respectively to cooperate with the left slide rail 38 and the right slide rail 39. The left connecting plate 36 and the right connecting plate move horizontally along the left slide rail 38 and the right slide rail 39 respectively.

[0029] like Figure 4 As shown, the folding assembly includes a left folding cylinder 41, a right folding cylinder, a front folding cylinder 42, a left folding plate 45, a right folding plate, a front folding plate 46, a left vertical plate 47, a right vertical plate, and a front vertical plate 48. The left folding cylinder 41 is horizontally installed on the left side of the left vertical plate 47, and the left folding cylinder 41 is connected to the left folding plate 45 through the left folding cylinder joint 43, and the left vertical plate 47 is connected to the left pressure plate 49. The right folding cylinder is horizontally installed on the right side of the right vertical plate, and the right folding cylinder is connected to the right folding plate through the right cylinder joint, and the right vertical plate is connected to the right pressure plate. The front folding cylinder 42 is horizontally installed on the front side of the front vertical plate 48, and the front folding cylinder 42 is connected to the front folding plate 46 through the front folding cylinder joint 44, and the front vertical plate 48 is vertically installed on the lower surface of the front end of the mounting top plate 11.

[0030] The left pressure plate 49, the right pressure plate, and the front pressure plate 50 cooperate with the left cloth supporting plate 65, the right cloth supporting plate 66, and the front cloth supporting plate 67 of the cloth supporting assembly to clamp the pocket cloth, the telescopic rods of the left folding cylinder 41, the right folding cylinder, and the front folding cylinder 42 are retracted, the left folding plate 45 moves the cloth in along the bottom of the left cloth supporting plate 65, the right folding plate folds the cloth in along the bottom of the right cloth supporting plate 66, and the front folding plate 46 folds the cloth in along the bottom of the front cloth supporting plate 67 to complete the folding action.

[0031] like Figure 5 As shown, the angle adjustment assembly includes a first telescopic cylinder 57, a second telescopic cylinder, a left rotating motor 51, a right rotating motor 52, a left rotating motor base plate 53, a right rotating motor 52 base plate, a first connecting member 59, a second connecting member 60, a first crank 55, and a second crank 56. Since the angle adjustment assembly is mounted on the left connecting plate 36 and the right connecting plate in a mirror-symmetrical manner, only the left angle adjustment assembly is described.

[0032] The left rotating motor 51 is vertically mounted on the left connecting plate 36 through the left rotating motor bracket 63. The left rotating motor bottom plate 53 is mounted below the left connecting plate 36 through a rotating bearing. The transmission rod of the left rotating motor 51 is connected downward to the left rotating motor bottom plate 53, driving the left rotating motor bottom plate 53 to rotate. The left rotating motor bottom plate 53 is connected to the left vertical plate 47. Two symmetrical curved grooves 54 are installed on the left connecting plate 36, and the guide screws pass through the curved grooves 54 and are connected to the left rotating motor bottom plate 53. When the left rotating motor bottom plate 53 rotates, the guide screws move in the curved grooves 54.

[0033] The first telescopic cylinder 57 is horizontally mounted on the left connecting plate 36, and the telescopic rod of the first telescopic cylinder 57 is connected to the fisheye joint 58 to the left. The fisheye joint 58 is connected to the front end of the first connecting member 59 and the front end of the second connecting member 60 through the first connecting shaft 61. The rear end of the first connecting member 59 is connected to the front end of the first crank 55, and the rear end of the first crank 55 is connected to the first screw on the lower surface of the left rotating motor bracket 63. The rear end of the second connecting member 60 is connected to the second crank 56 through the second connecting shaft 62, and the rear end of the second crank 56 is connected to the second screw on the lower surface of the left rotating motor bracket 63. The front ends of the first crank 55 and the second crank 56 are respectively provided with a first slide groove and a second slide groove, and the third screw and the fourth screw on the lower surface of the left rotating motor bracket 63 pass through the corresponding first slide groove and the second slide groove, respectively, and the third screw and the fourth screw move in the first slide groove and the second slide groove, respectively.

[0034] The telescopic rod of the first telescopic cylinder 57 extends, pushing the front end of the first crank 55 and the front end of the second crank 56 to open, and at this time, the left rotating motor 51 is driven to drive the left rotating motor bottom plate 53 to rotate, so as to adjust the angle of the left folding assembly. After the angle adjustment is completed, the telescopic rod of the first telescopic cylinder 57 retracts, pulling the front end of the first crank 55 and the front end of the second crank 56 to clamp, clamping the transmission rod of the left rotating motor 51, and preventing the left rotating motor bottom plate 53 from loosening during the operation, which affects the bag folding effect.

[0035] The cloth supporting assembly includes a cloth supporting mounting plate 64, a left cloth supporting plate 65, a right cloth supporting plate 66, a front cloth supporting plate 67, a left supporting cylinder 68, and a right supporting cylinder 69. The left supporting cylinder 68 is installed on the left side of the front end of the cloth supporting mounting plate 64, and the telescopic rod of the left supporting cylinder 68 is connected to the left supporting cylinder connecting block 70, and the left supporting cylinder connecting block 70 is connected to the left cloth supporting plate 65. The right supporting cylinder 69 is installed on the right side of the front end of the cloth supporting mounting plate 64, and the telescopic rod of the right supporting cylinder 69 is connected to the right supporting cylinder connecting block 71, and the right supporting cylinder connecting block 71 is connected to the right cloth supporting plate 66. The rear end of the front cloth supporting plate 67 is fixedly installed on the lower surface of the cloth supporting mounting plate 64.

[0036] like Figure 6 As shown, the cloth-holding driving assembly includes a second motor 72, a second conveyor belt 75, a left connecting block 79, a right connecting block 80, a front fixed bottom plate 73, a rear fixed bottom plate 74, a movable plate 81, and a transmission plate 82. The second motor 72 is horizontally mounted on the right side of the rear fixed bottom plate 74, the transmission rod of the second motor 72 is connected to the second driving wheel 76, the second driven wheel 77 is mounted on the front fixed bottom plate 73, and the second conveyor belt 75 is meshedly connected with the second driving wheel 76 and the second driven wheel 77. The cloth-holding mounting plate 64 is fixedly connected to the movable plate 81 below through the left connecting block 79 and the right connecting block 80, and the second clamping piece 78 on the right connecting block 80 clamps the second conveyor belt 75. The second motor 72 drives the second conveyor belt 75 to rotate, and the second clamping piece 78 on the right connecting block 80 drives the cloth-holding mounting plate 64 and the movable plate 81 to move forward and backward.

[0037] The middle parts of the sixth guide rail mounting plate 83 and the seventh guide rail mounting plate 84 are parallelly mounted on the transmission plate 82, the front part of the seventh guide rail mounting plate 84 is mounted on the front fixed bottom plate 73, and the rear part of the seventh guide rail mounting plate 84 is mounted on the rear fixed bottom plate 74. The sixth guide rail 85 and the seventh guide rail 86 are horizontally mounted on the sixth guide rail mounting plate 83 and the seventh guide rail mounting plate 84, respectively. The sixth slider and the seventh slider are mounted on the lower surface of the moving plate 81 to cooperate with the sixth guide rail 85 and the seventh guide rail 86, respectively, and the moving plate 81 moves forward and backward along the sixth guide rail 85 and the seventh guide rail 86. The sensor 87 is mounted on the lower surface of the moving plate 81 to sense whether the seventh guide rail 86 slides out.

[0038] The second lifting cylinder 88 is vertically installed below the mounting base plate 91 through the second lifting cylinder mounting frame 89. The telescopic rod of the second lifting cylinder 88 is upwardly connected to the second lifting cylinder joint 90. The second lifting cylinder joint 90 passes through the mounting base plate 91 and is fixedly connected to the lower surface of the transmission plate 82. The left side of the transmission plate 82 is connected to the third lifting vertical plate 92. The outer side of the third lifting vertical plate 92 is installed with a first slider 7 and a second slider 8 that cooperate with the first guide rail 5 and the second guide rail 6 respectively. The third lifting vertical plate 92 drives the left side of the transmission plate 82 to move vertically along the first guide rail 5 and the second guide rail 6. The fourth lifting vertical plate 93 is fixedly installed on the mounting base plate 91. The eighth guide rail 94 is vertically installed on the left side of the fourth lifting vertical plate 93. The lifting connector 95 is installed on the right side of the transmission plate 82. The eighth slider is installed on the right side of the lifting connector 95 to cooperate with the eighth guide rail 94. The right side of the transmission plate 82 moves vertically along the eighth guide rail 94.

[0039] The telescopic rod of the second lifting cylinder 88 is retracted, pulling the transmission plate 82 downward. The left side of the transmission plate 82 is connected to the first motor 12, and the first motor 12 is connected to the mounting top plate 11, that is, the transmission plate 82 and above move downward as a whole. The left pressing plate 49, the right pressing plate, and the front pressing plate 50 clamp the pocket fabric with the left cloth-holding plate 65, the right cloth-holding plate 66, and the front cloth-holding plate 67 respectively, and the folded pocket fabric is attached downward to the body fabric, realizing a secondary descent.

[0040] The overall process of bag folding is as follows: the second motor 72 drives the cloth support assembly to move forward, the telescopic rods of the left support cylinder 68 and the right support cylinder 69 on the cloth support assembly extend, and the left cloth support plate 65 and the right cloth support plate 66 move to the left and right respectively to the bag-shaped position. The main body fabric is placed on the workbench, and the pocket fabric is placed on the left cloth support plate 65, the right cloth support plate 66, and the front cloth support plate 67. The first motor 12 drives the first conveyor belt 14 to move the mounting top plate 11 forward to the top of the cloth support assembly, the telescopic rod of the first lifting cylinder 1 retracts, and the folding assembly is close to the cloth support assembly to clamp the pocket fabric. The folding assembly and the cloth support assembly cooperate to complete the bag folding. Keeping the bag folding state, the telescopic rod of the second lifting cylinder 88 retracts, and the folding assembly and the cloth support assembly move downward together until the pocket fabric is attached to the main body fabric. The telescopic rods of the left folding cylinder 41, the right folding cylinder and the front folding cylinder 42 of the folding assembly extend, and the left folding plate 45, the right folding plate and the front folding plate 46 leave the pocket fabric. The telescopic rod of the first lifting cylinder 1 extends, the folding assembly is lifted upward, and the cloth holding assembly remains stationary, completing the kangaroo bag pasting action.

[0041] The best embodiment of the present invention has been explained, and various changes or modifications made by ordinary technicians in this field will not depart from the scope of the present invention.

Claims

1. A folding edge adjustment assembly for a bag folding device, comprising a lifting and lowering mounting top plate (11), characterized in that: The mounting top plate (11) is provided with a third motor (19), and the power output shaft of the third motor (19) is connected to the rotating gear (29); a first rack (30) and a second rack (31) capable of horizontal movement are provided above the mounting top plate (11), and the rotating gear (29) is located between the first rack (30) and the second rack (31) and meshes with each other respectively; a left connecting plate (36) and a right connecting plate capable of horizontal sliding are provided below the mounting top plate (11), the first rack (30) is connected to the left connecting plate (36), and the second rack (31) is connected to the right connecting plate.

2. The hem adjustment assembly according to claim 1, characterized in that: One side of the mounting top plate (11) is slidably mounted on the first lifting vertical plate (4) via a third guide rail (18), and the first lifting vertical plate (4) is provided with a first motor (12) for driving the mounting top plate (11) to slide.

3. The hem adjustment assembly according to claim 2, characterized in that: The driving rod of the first motor (12) is connected to the first driving wheel (15), and the first driven wheel (16) is installed at the other end of the first lifting vertical plate (4); the first conveyor belt (14) is installed on the first driving wheel (15) and the first driven wheel (16), and is connected to the mounting top plate (11) through a first clamp (17).

4. The hem adjustment assembly according to claim 3, characterized in that: A guide shaft (23) is fixed on the other side of the mounting top plate (11), a linear bearing (25) is installed on the second lifting vertical plate (8), and the guide shaft (23) is slidably installed in the linear bearing (25).

5. The hem adjustment assembly according to claim 4, characterized in that: The first lifting upright plate (4) is slidably mounted on the left mounting plate (9), and the second lifting upright plate (8) is slidably mounted on the right mounting plate (10). A first lifting cylinder (1) for driving the first lifting upright plate (4) to move upward and downward is provided between the first lifting upright plate (4) and the left mounting plate (9).

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