Adjustable sewing equipment for different specifications of washing machine inner tank

Abstract

The application discloses a seaming device for different specifications of washing machine inner containers, and relates to the technical field of washing machine production. The seaming device for different specifications of washing machine inner containers is characterized by the cooperation of the shaping roller and the load roller. When the metal sheet body is occluded to form an inner container at both ends and the occluded part is placed above the lower die, the shaping roller and the load roller are simultaneously expanded outward, which can make the shaping roller and the load roller contact and support the inner wall of the inner container, so that the shape of the inner container is formed into a ring-shaped part and then the pressing operation is performed, the forming effect of the inner container is further improved, the deviation of the pressing part is avoided, and the support and pressing treatment of the inner container of different specifications is realized, so that the application range of the equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of washing machine manufacturing technology, specifically to an adjustable seam-sealing device for the inner tubs of washing machines of different specifications. Background Technology

[0002] The molding of the washing machine inner tub requires a series of processes, including cutting, feeding, folding, and pressing. The molded inner tub is then smoothed, and burrs on the edges are removed. Finally, the joint sealing and structural strength are checked to complete the molding process and ensure that the tub is firm and seamless. Referring to the Chinese patent, "An Integrated Washing Machine Inner Tub Forming Machine with Folding, Rounding, and Seaming" (publication number: CN120984780B), this patent points out that currently, due to manual loading and unloading, the different positions of the materials placed manually, and the inconsistent tension during assembly, the inner tub is not very precise in its stitching and forming, resulting in very low consistency. The aforementioned equipment supports the metal sheet by using a cylindrical support when fastening the inner tub. This requires changing the cylindrical support for different sizes of inner tubs, which is cumbersome. Secondly, the V-groove after folding can be fastened before pressing, but as the V-groove is stressed, gaps will remain inside, affecting the connection effect at the pressing point of the inner tub. To address these issues, we propose an adjustable fastening device for inner tubs of different sizes of washing machines. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an adjustable seam-sealing device for inner drums of washing machines of different sizes, thus solving the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: an adjustable seam-sealing device for inner drums of washing machines of different specifications, comprising a body, a conveying module assembled at the end of the body for conveying a metal sheet body, a folding module provided along the conveying module inside the body, gripping components symmetrically distributed around the body, and a bearing ring frame fixedly installed in the middle of the inner side of the body, with multiple limiting slots symmetrically opened inside the bearing ring frame, and a load-bearing rod provided inside each limiting slot; Multiple limiting slots are distributed circumferentially along the inside of the bearing ring frame. The outer sides of the load-bearing rods on both sides are rotatably sleeved with shaping rollers. The outer sides of the two upper load-bearing rods are rotatably sleeved with multiple load-bearing rollers. A drive ring frame is fixedly installed on the side of the bearing ring frame. Multiple lifting cylinders are fixedly installed inside the drive ring frame. A connecting arm is fixedly installed on the piston end of the lifting cylinder. The connecting arm is fixedly connected to the corresponding shaping roller and load-bearing roller, which is used to drive the corresponding shaping roller and load-bearing roller to extend outward and support the inner liner of different specifications. An assembly frame is slidably mounted on the side of the bearing ring frame near the load-bearing rod. A lower mold is fixedly installed on the top of the assembly frame. A counterweight column is fixedly installed on the end of the assembly frame away from the upper mold. An adjusting cylinder is fixedly installed inside the bearing ring frame. The piston end of the adjusting cylinder is fixedly connected to the assembly frame. A pressing module is fixedly installed on the top of the machine body, and an upper mold is installed below the pressing module. The pressing module is used to drive the upper mold to move down and contact the lower mold to achieve pressing and shaping of the metal sheet body.

[0005] Preferably, multiple feeding rollers are fixedly sleeved on the outer side of the two upper load-bearing rods. The feeding rollers are installed between two adjacent load-bearing rollers. Transmission gears are fixedly sleeved at the ends of the two upper load-bearing rods. The transmission gears are used to drive the two load-bearing rods and the corresponding feeding rollers to rotate in opposite directions, which is used to deepen the engagement of the metal sheet body after folding.

[0006] Preferably, two drive toothed belts are rotatably connected to the side of the bearing ring frame away from the load-bearing rod. The assembly direction of the drive toothed belts is parallel to the starting direction of the corresponding limiting slots. The drive toothed belts are engaged with the corresponding transmission gears. Limiting rods are rotatably connected to both sides of the inside of the drive toothed belts. The limiting rods on both sides are rotatably connected to the side of the bearing ring frame. Drive gears are fixedly sleeved at the ends of the limiting rods on both sides, and the two drive gears are engaged with each other.

[0007] Preferably, a drive motor is fixedly installed on the side of the bearing ring frame, and the output end of the drive motor is fixedly connected to the corresponding limit rod.

[0008] Preferably, a protective cover is fixedly installed on the side of the load-bearing ring frame away from the load-bearing rod.

[0009] Preferably, the gripping component includes a drive frame, and there are four drive frames respectively mounted on both sides of the machine body. The drive frame on one side is fixedly connected to the machine body, and the drive frame on the other side is slidably connected to the machine body, which is used to adjust the position of the drive frame for different sizes of inner liner.

[0010] Preferably, a drive plate is slidably connected longitudinally to the side of the drive frame, and a translation frame is slidably connected laterally to the side of the drive plate. A clamping module is provided at the end of the translation frame, and a clamping cylinder is mounted above the clamping module. A drive cylinder is fixedly installed inside the translation frame, and a drive module is provided between the drive frame and the drive plate.

[0011] Preferably, a positioning ring is rotatably sleeved on the outer side of each of the two load-bearing rollers, and a lifting frame is assembled between the two positioning rings. An adjusting screw is threadedly connected to the center of the lifting frame, and a load-bearing plate is rotatably assembled at the top of the adjusting screw. The load-bearing plate is used to support the end of the assembly frame.

[0012] Preferably, connecting slide rods are fixedly installed on both sides of the bottom of the lifting frame, and limiting ring sleeves corresponding to the connecting slide rods are fixedly installed on the bottom of the two positioning rings. The connecting slide rods pass through the corresponding limiting ring sleeves and maintain a sliding connection with them.

[0013] Preferably, a return spring is fitted to the end of each of the two connecting slide rods.

[0014] This invention provides an adjustable seam-sealing device for the inner drums of washing machines of different sizes. Compared with the prior art, it has the following advantages: (1) This adjustable snap-fit ​​device for inner tubs of washing machines of different specifications, through the cooperation of the shaping roller and the load-bearing roller, when the two ends of the metal sheet body are engaged to form the inner tub and the engagement point is placed above the lower mold, the shaping roller and the load-bearing roller expand outward at the same time, so that it can contact the inner wall of the inner tub and complete the support, so that the inner tub is formed into a ring shape and then the pressing operation is carried out, which further improves the forming effect of the inner tub, avoids the displacement of the pressing point, and can support the pressing treatment for inner tubs of different specifications, thus improving the applicability of the equipment.

[0015] (2) This adjustable seam-locking device for inner tubs of washing machines of different specifications can, through the cooperation of the conveying roller and the load-bearing rod, rotate in opposite directions on both sides during the pressing process, which can drive the two ends of the metal sheet body to be subjected to outward force, so that the pre-pressed V-groove can be further engaged. At this time, the pressing operation is completed by the upper mold moving down for the second time, which can further improve the pressing effect of the V-groove and avoid gaps at the inner tub pressing point.

[0016] (3) This adjustable seam-sealing device for inner tubs of washing machines of different specifications can support and press inner tubs of different specifications through the cooperation of the lifting frame and the adjusting screw. The lifting frame can move up with the positioning ring and the load-bearing roller through the cooperation of the connecting slide rod until the load-bearing plate contacts the lower end of the lower mold to complete the support, ensuring the stability of the subsequent pressing process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 For the present invention Figure 1 Side view structural diagram; Figure 4 This is a schematic diagram of the supporting ring frame and metal sheet body structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6This is a schematic cross-sectional view of the load-bearing ring frame structure of the present invention; Figure 7 For the present invention Figure 6 Side view structural diagram; Figure 8 This is a cross-sectional view of the load-bearing roller structure of the present invention.

[0018] In the diagram: 1. Machine body; 2. Pressing module; 201. Upper mold; 3. Conveying module; 4. Metal sheet body; 5. Drive frame; 501. Drive plate; 502. Drive module; 503. Translation frame; 504. Clamping module; 505. Clamping cylinder; 506. Drive cylinder; 6. Folding module; 7. Bearing ring frame; 701. Limiting slot; 8. Protective cover; 9. Load-bearing rod; 10. Drive ring frame; 11. Lifting cylinder; 1101. Connecting arm ; 12. Shaping roller; 13. Load-bearing roller; 14. Feeding roller; 15. Transmission gear; 16. Drive toothed belt; 1601. Limiting rod; 17. Drive motor; 18. Drive gear; 19. Positioning ring; 20. Assembly frame; 2001. Lower mold; 2002. Counterweight column; 2003. Adjusting cylinder; 21. Lifting frame; 22. Connecting slide rod; 2201. Return spring; 23. Limiting ring sleeve; 24. Adjusting screw; 2401. Load-bearing plate. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-8 The present invention provides two technical solutions, specifically including the following embodiments: Example 1

[0021] In this embodiment of the invention, an adjustable seam-sealing device for the inner tub of washing machines of different specifications includes a body 1, a conveying module 3 is assembled at the end of the body 1, the conveying module 3 is used to convey the metal sheet body 4, a folding module 6 is provided inside the body 1 along the conveying module 3, gripping components are symmetrically distributed around the body 1, and a bearing ring frame 7 is fixedly installed in the middle of the inner side of the body 1. Multiple limiting slots 701 are symmetrically opened inside the bearing ring frame 7, and each limiting slot 701 is provided with a load-bearing rod 9. Specifically, the conveying module 3 is an existing conveyor belt device used to convey the metal sheet body 4 to the inside of the machine body 1 for bending and pressing. The folding module 6 is an existing folding device composed of a motor, hydraulic cylinder and other structures, used to bend both ends of the conveyed metal sheet body 4 to form V-shaped grooves at both ends of the metal sheet body 4. Then, the two V-shaped grooves interlock with each other and the pressing operation is carried out to form the inner liner. Specifically, the gripping component is used to grip the folded metal sheet body 4 and wind the metal sheet body 4 into a cylindrical shape to form an inner liner, so that the V-shaped grooves at both ends of the metal sheet body 4 are engaged, and the metal sheet body 4 is wound into an inner liner shape. Specifically, when the two ends of the metal sheet body 4 are bent, the bending directions are opposite, that is, one side is bent inward and the other side is bent outward, so that when it is wound into the shape of the inner tube, the V-shaped grooves at both ends can complete the interlocking operation. Multiple limiting slots 701 are circumferentially distributed along the inside of the bearing ring frame 7. The outer sides of the load-bearing rods 9 on both sides are rotatably sleeved with shaping rollers 12. The outer sides of the two upper load-bearing rods 9 are rotatably sleeved with multiple load-bearing rollers 13. A drive ring frame 10 is fixedly installed on the side of the bearing ring frame 7. Multiple lifting cylinders 11 are fixedly installed inside the drive ring frame 10. A connecting arm 1101 is fixedly installed on the piston end of the lifting cylinder 11. The connecting arm 1101 is fixedly connected to the corresponding shaping roller 12 and load-bearing roller 13, and is used to drive the corresponding shaping roller 12 and load-bearing roller 13 to extend outward to support the inner liner of different specifications. Specifically, multiple connecting arms 1101 are respectively connected to the middle position of the shaping roller 12 and the corresponding load-bearing roller 13. By operating the lifting cylinder 11, the corresponding shaping roller 12 and load-bearing roller 13 can be driven to expand outward. During the expansion process, the shaping roller 12 and load-bearing roller 13 are always arranged in a circular array based on the central axis of the bearing ring frame 7, so as to be suitable for the inner liner support operation of different specifications. The bearing ring frame 7 is slidably mounted with an assembly frame 20 on one side near the load-bearing rod 9. The top of the assembly frame 20 is fixedly mounted with a lower mold 2001. The end of the assembly frame 20 away from the upper mold 201 is fixedly mounted with a counterweight column 2002. An adjusting cylinder 2003 is fixedly mounted inside the bearing ring frame 7. The piston end of the adjusting cylinder 2003 is fixedly connected to the assembly frame 20. Specifically, by adjusting the cylinder 2003, the assembly frame 20 and the upper mold 201 are driven to adjust their height, so that the lower mold 2001 can adapt to the pressing operation of inner liner of different specifications. The adjustment cylinder 2003 is controlled based on the existing hydraulic cylinder controller. A pressing module 2 is fixedly installed on the top of the machine body 1. An upper mold 201 is installed below the pressing module 2. The pressing module 2 is used to drive the upper mold 201 to move down and contact the lower mold 2001 to realize the pressing and shaping of the metal sheet body 4. Specifically, as the gripping component grips the two ends of the metal sheet body 4 and winds it into an inner liner shape, the V-groove engagement position is located directly above the lower mold 2001. Then, through the simultaneous operation of multiple lifting cylinders 11, the two shaping rollers 12 and multiple load-bearing rollers 13 can be driven to expand outward through the connecting arms 1101 at their ends until the shaping rollers 12 and load-bearing rollers 13 contact the inner wall of the inner liner and push it outward until the inner liner forms a ring. At this time, multiple load-bearing rods 9 can slide along the limiting groove 701 with the shaping rollers 12 and load-bearing rollers 13, forming a ring array inside the bearing ring frame 7. After supporting the inner liner, the upper mold 201 is driven to move down through the pressing module 2, so that the upper mold 201 contacts the V-groove engagement position. Then, through the cooperation of the lower mold 2001, the pressing operation of the inner liner is completed. Specifically, the lifting cylinder 11 is controlled based on the existing hydraulic cylinder controller; Multiple feeding rollers 14 are fixedly sleeved on the outer side of the two upper load-bearing rods 9. The feeding rollers 14 are installed between two adjacent load-bearing rollers 13. Transmission gears 15 are fixedly sleeved at the ends of the two upper load-bearing rods 9. The transmission gears 15 are used to drive the two load-bearing rods 9 and the corresponding feeding rollers 14 to rotate in opposite directions, which is used to deepen the engagement of the metal sheet body 4 after folding. Specifically, the feeding roller 14 is used to further engage the two V-grooves. When the upper mold 201 moves down and contacts the inner liner above the lower mold 2001, the two V-grooves can deform under force, making the angle of the V-grooves smaller. At this time, the upper mold 201 moves up and separates from the inner liner, completing the pre-pressing. Then, the two load-bearing rods 9 located above drive the corresponding feeding roller 14 to rotate in the opposite direction, which can drive the two ends of the metal sheet body 4 to be subjected to outward force, so that the pre-pressed V-grooves further engage. At this time, the pressing operation is completed by the upper mold 201 moving down a second time, further improving the pressing effect of the V-grooves.

[0022] Two drive toothed belts 16 are rotatably connected to the side of the bearing ring frame 7 away from the load-bearing rod 9. The assembly direction of the drive toothed belts 16 is parallel to the starting direction of the corresponding limiting slots 701. The drive toothed belts 16 are meshed with the corresponding transmission gears 15. Limiting rods 1601 are rotatably connected to both sides of the inside of the drive toothed belts 16. The limiting rods 1601 on both sides are rotatably connected to the side of the bearing ring frame 7. Drive gears 18 are fixedly sleeved at the ends of the limiting rods 1601 on both sides. The two drive gears 18 mesh with each other.

[0023] A drive motor 17 is fixedly installed on the side of the bearing ring frame 7, and the output end of the drive motor 17 is fixedly connected to the corresponding limit rod 1601. Specifically, the drive motor 17 is an existing device used to drive the corresponding limit rod 1601 to rotate. As the limit rod 1601 rotates, it can drive the drive toothed belt 16 on one side to rotate in the same direction as the limit rod 1601. At this time, through the meshing of the two drive gears 18, it can drive the drive toothed belt 16 on the other side and the corresponding limit rod 1601 to rotate in the opposite direction. Through the reverse operation of the two drive toothed belts 16, it can drive the two transmission gears 15 meshed with them to keep their movement directions opposite, thereby driving the two corresponding load-bearing rods 9 to move in the opposite direction.

[0024] A protective cover 8 is fixedly installed on the side of the bearing ring frame 7 away from the load-bearing rod 9. The protective cover 8 is ring-shaped and fits around the outside of the drive motor 17. The diameter of the protective cover 8 is the same as the diameter of the bearing ring frame 7.

[0025] The gripping component includes a drive frame 5. There are four drive frames 5, which are respectively mounted on both sides of the body 1. One drive frame 5 is fixedly connected to the body 1, and the other drive frame 5 is slidably connected to the body 1. This is used to adjust the position of the drive frame 5 for different sizes of inner liner.

[0026] A drive plate 501 is longitudinally slidably connected to the side of the drive frame 5, and a translation frame 503 is laterally slidably connected to the side of the drive plate 501. A clamping module 504 is provided at the end of the translation frame 503, and a clamping cylinder 505 is mounted on the top of the clamping module 504. A drive cylinder 506 is fixedly installed inside the translation frame 503. A drive module 502 is provided between the drive frame 5 and the drive plate 501. The drive module 502 is an existing chain drive that can drive the corresponding drive plate 501 to perform longitudinal translation. The clamping module 504 is driven by the clamping cylinder 505. The clamping cylinder 505 is controlled by a hydraulic controller. The clamping operation of the metal sheet body 4 is completed by driving the clamping module 504.

[0027] Example 2: Based on Example 1, positioning rings 19 are rotatably sleeved on the outer sides of the two load-bearing rollers 13. A lifting frame 21 is assembled between the two positioning rings 19. An adjusting screw 24 is threadedly connected to the center position inside the lifting frame 21. A load-bearing plate 2401 is rotatably assembled at the top of the adjusting screw 24. The load-bearing plate 2401 is used to support the end of the assembly frame 20.

[0028] Connecting slide rods 22 are fixedly installed on both sides of the bottom of the lifting frame 21. Limiting ring sleeves 23 corresponding to the connecting slide rods 22 are fixedly installed on the bottom of the two positioning rings 19. The connecting slide rods 22 pass through the corresponding limiting ring sleeves 23 and maintain a sliding connection with them.

[0029] Both ends of the two connecting slide rods 22 are fitted with return springs 2201; Specifically, the lifting frame 21 and adjusting screw 24 are used to support the end of the assembly frame 20 when working with inner liner of different specifications, so as to prevent the assembly frame 20 from shifting when the upper mold 201 moves down for pressing. During operation, the adjusting screw 24 is manually rotated according to the specifications of the inner liner to be pressed, so as to adjust the height of the load-bearing plate 2401. When the load-bearing roller 13 expands, the lifting frame 21, adjusting screw 24 and load-bearing plate 2401 can be driven to move upward through the cooperation of the two positioning rings 19 and the connecting slide rod 22 until the load-bearing plate 2401 contacts the lower end of the assembly frame 20 to complete the support. During the expansion of the load-bearing roller 13, the connecting slide rod 22 can slide inside the corresponding limiting ring sleeve 23 to compress the return spring 2201 until the pressing operation is completed and the load-bearing roller 13 is reset. The lifting frame 21 can be reset through the cooperation of the return spring 2201.

[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. An adjustable seam-sealing device for inner drums of washing machines of different specifications, comprising a body (1), a conveying module (3) assembled at the end of the body (1), the conveying module (3) being used to convey a metal sheet body (4), a folding module (6) being provided inside the body (1) along the conveying module (3), and gripping components symmetrically distributed around the body (1), characterized in that: The inner middle of the body (1) is fixedly installed with a bearing ring frame (7). Multiple limiting slots (701) are symmetrically opened inside the bearing ring frame (7), and each limiting slot (701) is provided with a load-bearing rod (9). Multiple limiting slots (701) are distributed circumferentially along the inside of the bearing ring frame (7). The outer sides of the load-bearing rods (9) on both sides are rotatably sleeved with shaping rollers (12). The outer sides of the two upper load-bearing rods (9) are rotatably sleeved with multiple load-bearing rollers (13). The side of the bearing ring frame (7) is fixedly installed with a drive ring frame (10). The inside of the drive ring frame (10) is fixedly installed with multiple lifting cylinders (11). The piston end of the lifting cylinder (11) is fixedly installed with a connecting arm (1101). The connecting arm (1101) is fixedly connected with the corresponding shaping roller (12) and load-bearing roller (13) to drive the corresponding shaping roller (12) and load-bearing roller (13) to extend outward and support the inner liner of different specifications. An assembly frame (20) is slidably mounted on the side of the bearing ring frame (7) near the load-bearing rod (9). A lower mold (2001) is fixedly installed on the top of the assembly frame (20). A counterweight column (2002) is fixedly installed on the end of the assembly frame (20) away from the upper mold (201). An adjusting cylinder (2003) is fixedly installed inside the bearing ring frame (7). The piston end of the adjusting cylinder (2003) is fixedly connected to the assembly frame (20). A pressing module (2) is fixedly installed on the top of the body (1). An upper mold (201) is installed below the pressing module (2). The pressing module (2) is used to drive the upper mold (201) to move down and contact the lower mold (2001) to achieve pressing and molding of the metal sheet body (4).

2. The adjustable hemming device for different size washing machine inner tub according to claim 1, characterized in that: Multiple feeding rollers (14) are fixedly sleeved on the outer side of the two upper load-bearing rods (9). The feeding rollers (14) are installed between two adjacent load-bearing rollers (13). The ends of the two upper load-bearing rods (9) are fixedly sleeved with transmission gears (15). The transmission gears (15) are used to drive the two load-bearing rods (9) and the corresponding feeding rollers (14) to rotate in opposite directions, which is used to deepen the engagement of the metal sheet body (4) after folding.

3. The adjustable hemming device for different size washing machine inner tub according to claim 2, characterized in that: Two drive toothed belts (16) are rotatably connected to the side of the bearing ring frame (7) away from the load-bearing rod (9). The assembly direction of the drive toothed belts (16) is parallel to the starting direction of the corresponding limiting slot (701). The drive toothed belts (16) are meshed with the corresponding transmission gears (15). Limiting rods (1601) are rotatably connected to both sides of the inside of the drive toothed belts (16). The limiting rods (1601) on both sides are rotatably connected to the side of the bearing ring frame (7). The ends of the limiting rods (1601) on both sides are fixedly sleeved with drive gears (18). The two drive gears (18) mesh with each other.

4. The adjustable hemming device for different size washing machine inner tub according to claim 3, characterized in that: A drive motor (17) is fixedly installed on the side of the bearing ring frame (7), and the output end of the drive motor (17) is fixedly connected to the corresponding limit rod (1601).

5. The adjustable hemming device for different size washing machine inner tub according to claim 3, characterized in that: A protective cover (8) is fixedly installed on the side of the load-bearing ring frame (7) away from the load-bearing rod (9).

6. The adjustable hemming device for different size washing machine inner tub according to claim 1, characterized in that: The gripping component includes a drive frame (5), there are four drive frames (5) and they are respectively mounted on both sides of the body (1). One drive frame (5) is fixedly connected to the body (1), and the other drive frame (5) is slidably connected to the body (1) for adjusting the position of the drive frame (5) for different sizes of inner liner.

7. The adjustable hemming device for different size washing machine inner tub according to claim 6, characterized in that: The drive frame (5) is longitudinally slidably connected to a drive plate (501), and the drive plate (501) is laterally slidably connected to a translation frame (503). The end of the translation frame (503) is provided with a clamping module (504), and a clamping cylinder (505) is mounted above the clamping module (504). The translation frame (503) is fixedly installed with a drive cylinder (506), and a drive module (502) is provided between the drive frame (5) and the drive plate (501).

8. The adjustable hemming device for different size washing machine inner tub according to claim 1, characterized in that: The outer sides of the two load-bearing rollers (13) are rotatably fitted with positioning rings (19), and a lifting frame (21) is assembled between the two positioning rings (19). An adjusting screw (24) is threadedly connected to the center of the lifting frame (21), and a load-bearing plate (2401) is rotatably assembled at the top of the adjusting screw (24). The load-bearing plate (2401) is used to support the end of the assembly frame (20).

9. The adjustable hemming device for different size washing machine inner tub according to claim 8, characterized in that: The bottom sides of the lifting frame (21) are fixedly installed with connecting slide rods (22), and the bottom of the two positioning rings (19) are fixedly installed with limiting ring sleeves (23) corresponding to the connecting slide rods (22). The connecting slide rods (22) pass through the corresponding limiting ring sleeves (23) and maintain a sliding connection with them.

10. The adjustable hemming device for different size washing machine inner tub according to claim 9, characterized in that: Both of the connecting slide rods (22) are fitted with return springs (2201) at their ends.

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