Feeding structure for a sewing machine and method of use thereof

Abstract

The application relates to the field of sewing equipment, in particular to a sewing machine feeding structure and a using method thereof, which comprises a traction assembly, the traction assembly comprises a traction wheel set and a mounting plate, the mounting plate is connected with a table surface of the sewing machine, the traction wheel set comprises a movable wheel and a fixed wheel which are rotationally connected on the mounting plate, a gap for feeding a sewing material is arranged between the movable wheel and the fixed wheel, and a driving assembly for rotating the movable wheel is further arranged on the mounting plate. The traction wheel set assists the staff in pulling the sewing material on one side of the sewing material, so that the production efficiency of the staff is improved, and the labor burden of the staff is reduced.

Description

Technical Field

[0001] This application relates to the technical field of sewing equipment, and in particular to a feeding structure for a sewing machine and its method of use. Background Technology

[0002] Sewing machines are a common type of production equipment in the garment manufacturing industry, mainly used for sewing together multiple layers of fabric.

[0003] The sewing machine head is the main component of a sewing machine. It controls the needle to drive the thread back and forth through the fabric, thus sewing the fabric together. The sewing machine table is equipped with feed dogs that move parallel to the operator's direction. During operation, the operator places the fabric on the table, and the needle moves downwards, driving the thread through the fabric. The needle then moves upwards, driving the thread through the fabric from underneath. After the needle leaves the fabric, the feed dogs move, moving the fabric a certain distance before re-sewing.

[0004] During the sewing process, for stiff and difficult-to-fold fabrics, workers need to support the fabric from the side closest to them to assist in its movement and reduce the likelihood of bending or tilting in the sewn stitch. For soft fabrics, workers need to support the fabric with both hands on either side of the needle to prevent wrinkles and buildup on the needle side. Supporting the fabric with both hands during sewing not only increases the worker's workload but also negatively impacts sewing efficiency. Summary of the Invention

[0005] To reduce the workload of workers, this application provides a feeding structure for a sewing machine and a method for using it.

[0006] The technical solution provided in this application for a sewing machine feeding structure and its usage method is as follows:

[0007] A feeding structure for a sewing machine and its method of use include a traction assembly. The traction assembly includes a traction wheel set and a mounting plate. The mounting plate is connected to the table of the sewing machine. The traction wheel set includes a movable wheel and a fixed wheel rotatably connected to the mounting plate. A gap is provided between the movable wheel and the fixed wheel for the sewing material to pass through. The mounting plate is also provided with a drive assembly for rotating the movable wheel.

[0008] By adopting the above technical solution, when sewing soft and large-area fabrics, one side of the fabric is placed between the movable wheel and the fixed wheel. When the drive component drives the movable wheel to rotate, the movable wheel can move the fabric under the action of friction, thereby assisting the worker in supporting the fabric, reducing the worker's workload and improving work efficiency.

[0009] Optionally, a storage slot is provided on the table surface, and the mounting plate is rotatably connected to the side wall of the storage slot. Rotating the mounting plate allows the traction component to be submerged in the storage slot, while simultaneously making one side of the mounting plate flush with the sewing machine table surface.

[0010] By adopting the above technical solution, the rotating mounting plate allows the traction component to be submerged in the storage slot, thus storing the traction component and reducing its impact on workers' work when not in use. Simultaneously, the stored traction component is flush with the sewing machine table, ensuring a flat surface and facilitating sewing operations.

[0011] Optionally, the mounting plate is provided with an adjustment assembly, which includes an adjustment plate located between the movable wheel and the mounting plate. The adjustment plate is slidably connected to the mounting plate in a direction perpendicular to the axis of the fixed wheel. The movable wheel is connected to the adjustment plate, and sliding the adjustment plate can drive the movable wheel to move closer to or away from the fixed wheel.

[0012] By adopting the above technical solution, the sliding adjustment plate moves the movable wheel away from the fixed wheel, increasing the gap between them and making it easier for workers to place the fabric between them. After the fabric is placed, the sliding adjustment plate moves the movable wheel closer to the fixed wheel, thereby clamping the fabric.

[0013] Optionally, the adjustment assembly further includes a connecting post and a pull ring. One end of the connecting post is vertically welded to the adjustment plate, and the other end extends away from the adjustment plate and is flush with the side of the mounting plate away from the adjustment plate. The pull ring is connected to the connecting post, and the mounting plate has a clearance hole for the connecting post to move with the adjustment plate.

[0014] By adopting the above technical solution, when adjusting the position of the adjusting plate, the operator can move the connecting column by pulling the pull ring, which in turn moves the adjusting plate, thereby adjusting the position of the movable wheel.

[0015] Optionally, the pull ring is a semi-circular ring structure, with rotating shafts at both ends of the pull ring. The axis of the rotating shaft is perpendicular to the axis of the pull ring. A rotating groove is provided on the connecting post. The end of the rotating shaft away from the pull ring is inserted into the rotating groove and can rotate around its own axis.

[0016] By adopting the above technical solution, when the traction component is in its stored state, the rotatable pull ring can be made so that the axis of the pull ring is parallel to the length direction of the connecting column, thereby allowing the pull ring to be sleeved on the outside of the connecting column, reducing the space occupied by the pull ring and facilitating the sewing work of the staff.

[0017] Optionally, the end of the rotating shaft away from the connecting post extends to the outside of the pull ring. The connecting post is cylindrical. The rotating shaft can rotate around the axis of the connecting post. Rotating the rotating shaft around the axis of the connecting post can make the axis of the rotating shaft parallel or perpendicular to the moving direction of the connecting post. The clearance hole has limit grooves at both ends of the sliding direction of the connecting post. When the end of the rotating shaft away from the connecting post rotates from a state parallel to the sliding direction of the connecting post to a state perpendicular to the sliding direction, it can be inserted into the limit groove.

[0018] By adopting the above technical solution, when the rotating shaft is parallel to the moving direction of the connecting column, the rotating shaft is located outside the limiting groove, and at this time the connecting column can drive the adjusting plate to slide. When the connecting column is located at both ends of the clearance hole, it rotates around the axis of the connecting column, and the rotating shaft is inserted into the limiting groove to limit the movement of the connecting column, thereby limiting the position of the adjusting plate and improving the stability of the movable wheel during use.

[0019] Optionally, the connecting column is also provided with a sliding groove, the length direction of which extends along the circumference of the connecting column, and one end of which is connected to the rotating groove, so that the rotating shaft can enter the sliding groove.

[0020] By adopting the above technical solution, the rotating shaft is rotated around the axis of the connecting column, and the rotating shaft enters the sliding groove and slides in the sliding groove, thereby realizing the rotation around the axis of the connecting column.

[0021] Optionally, the vertical distance between the two sides of the sliding groove perpendicular to the axis of the connecting column is less than the diameter of the rotating groove. At the same time, two sliding surfaces are provided on the rotating shaft. When the axis of the pull ring is perpendicular to the axis of the connecting column, the two sliding surfaces are respectively flush with the two sides of the sliding groove perpendicular to the axis of the connecting column.

[0022] By adopting the above technical solution, when the connecting post is located at one end of the clearance hole, the pull ring is rotated around the axis of the connecting post. When the rotating shaft enters the rotating groove, the axis of the rotating shaft is perpendicular to the sliding direction of the connecting post, and the end of the rotating shaft away from the connecting post is inserted into the limiting groove. At this time, rotating the pull ring makes it parallel to the axis of the connecting post. In this state, the sliding surface is parallel to the axis of the connecting post, so the rotating shaft cannot enter the sliding groove, thus limiting the rotation of the pull ring around the axis of the connecting post and improving the stability of the moving limit of the rotating shaft on the connecting post.

[0023] Optionally, a sliding assembly is provided between the movable wheel and the adjusting plate. The sliding assembly includes a sliding block and an elastic element. The sliding block is slidably connected to the adjusting plate in a direction parallel to the sliding direction of the adjusting plate. The elastic element is used to keep the sliding block moving towards the fixed wheel.

[0024] By adopting the above technical solution, the movable wheel can press against the sewing material under the action of the elastic element. At the same time, the sliding block sliding in a direction parallel to the adjusting plate allows the movable wheel to adapt to the unevenness of the sewing material to a certain extent, improving the traction effect of the movable wheel on the sewing material.

[0025] The technical solution for using a sewing machine feeding structure provided in this application is as follows:

[0026] Optional, set the sewing material.

[0027] The steps for setting the sewing material include: adjusting the position between the movable wheel and the fixed wheel, so that the movable wheel is away from the fixed wheel.

[0028] It also includes placing the sewing material between the movable wheel and the fixed wheel;

[0029] And to hold the sewing material, adjust the position of the movable wheel to bring it closer to the fixed wheel.

[0030] By adopting the above technical solution, the position of the movable wheel is adjusted to increase the gap between the movable wheel and the fixed wheel, making it easier for workers to place the fabric between them. Finally, the movable wheel is brought closer to the fixed wheel to press against the fabric. In this state, the rotation of the movable wheel can apply a pulling force to the fabric, assisting workers in supporting the fabric and reducing their workload.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] The movable and fixed wheels clamp the sewing material. The drive assembly drives the movable wheels to rotate, thereby pulling the sewing material and assisting the workers in supporting the material, thus reducing the workload of the workers and improving work efficiency. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0034] Figure 2 This is an embodiment of the present application. Figure 1 Enlarged view of part A in the middle.

[0035] Figure 3 This is a schematic diagram of the first angle of the adjustment component according to an embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the second angle of the adjustment component according to an embodiment of this application.

[0037] Figure 5 This is an embodiment of the present application. Figure 4 Enlarged view of section B.

[0038] Figure 6 This is a schematic diagram of the structure of the driving component in an embodiment of this application.

[0039] Figure 7 This is an embodiment of the present application. Figure 6 Enlarged view of section C.

[0040] Reference numerals: 1. Sewing machine head; 2. Traction assembly; 21. Mounting plate; 22. Traction wheel set; 221. Movable wheel; 222. Fixed wheel; 23. Storage slot; 3. Adjustment assembly; 31. Adjustment plate; 311. Receiving cavity; 32. Connecting column; 33. Pull ring; 34. Rotating shaft; 35. Rotating groove; 36. Sliding groove; 37. Sliding surface; 38. Limiting groove; 39. Clearance hole; 4. Sliding assembly; 41. Sliding block; 42. Elastic element; 5. Drive assembly; 51. Fixed bevel gear set; 551. Spur gear; 552. Incomplete gear; 52. Movable bevel gear set; 53. Linkage telescopic rod; 531. Sliding rod; 532. Sliding sleeve; 54. Connecting shaft; 55. Spur gear set; 56. Drive component. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0042] This application discloses a feeding structure for a sewing machine and its usage method.

[0043] Reference Figure 1 and Figure 2 A sewing machine feeding structure includes a traction component 2, which is positioned on one side of the sewing machine head 1 along the feeding direction of the feed teeth. During sewing, the operator and the traction component 2 are positioned on opposite sides of the needle. The traction component 2 applies tension to the fabric in front of it in the direction of fabric movement, reducing fabric accumulation or wrinkles. This eliminates the need for the operator to hold both ends of the fabric separately, reducing workload and improving work efficiency.

[0044] Reference Figure 1 and Figure 2 The traction assembly 2 includes a mounting plate 21 and a traction wheel set 22, which includes a movable wheel 221 and a fixed wheel 222. The mounting plate 21 is vertically mounted on the sewing machine table. Both the movable wheel 221 and the fixed wheel 222 are rotatably connected to the mounting plate 21 around their own axes, and their axes are parallel to each other. During sewing, the side of the fabric away from the worker passes between the movable wheel 221 and the fixed wheel 222. In this state, when the movable wheel 221 rotates, it can drive the fabric to move, thereby reducing wrinkles in the fabric. To improve the stability of the traction assembly 2 during the fabric traction process, multiple sets of traction wheel sets 22 can be arranged at intervals along the feeding direction of the feed dog; in this embodiment, three sets are provided.

[0045] Reference Figure 1 and Figure 2 The sewing machine table has a storage slot 23, and the mounting plate 21 is rotatably connected to the storage slot 23. Rotating the mounting plate 21 allows it to be parallel to the table surface. When sewing smaller pieces of fabric, the mounting plate 21 can be rotated to move the traction component 2 into the storage slot 23. At the same time, the mounting plate 21 is flush with the table surface, keeping the table surface flat and facilitating the sewing work for the operator.

[0046] Reference Figure 3 and Figure 4 An adjustment assembly 3 is provided on the mounting plate 21. The adjustment assembly 3 is used to adjust the distance between multiple movable wheels 221 and fixed wheels 222. The adjustment assembly 3 includes an adjustment plate 31, which is located between the movable wheels 221 and the mounting plate 21. The adjustment plate 31 is slidably connected to the mounting plate 21 along a line perpendicular to the rotation axis 34 of the fixed wheels 222, and the multiple movable wheels 221 are rotatably connected to the adjustment plate 31. Sliding the adjustment plate 31 can drive the movable wheels 221 closer to or further away from the fixed wheels 222, thereby changing the gap between the movable wheels 221 and their corresponding fixed wheels 222. During operation, the adjustment plate 31 can be moved to move the movable wheels 221 away from the fixed wheels 222, making it easier for workers to place the sewing material between the movable wheels 221 and the fixed wheels 222.

[0047] Reference Figure 4 and Figure 5 The adjusting assembly 3 also includes a connecting post 32 and a pull ring 33. The connecting post 32 is cylindrical, with one end of the connecting post 32 vertically welded to the side of the adjusting plate 31 near the mounting plate 21, and the other end of the connecting post 32 flush with the side of the mounting plate 21 away from the adjusting plate 31. The mounting plate 21 has clearance holes 39 for the connecting post 32 to slide along with the adjusting plate 31. The pull ring 33 is a semi-circular ring, with both ends rotatably connected to the side of the connecting post 32. Rotating the pull ring 33 allows its axis to be perpendicular or parallel to the axis of the connecting post 32. When the axis of the pull ring 33 is perpendicular to the axis of the connecting post 32, the operator can pull the pull ring 33 to slide the adjusting plate 31, facilitating the adjustment of the position of the adjusting plate 31. Rotate the pull ring 33 so that its axis is parallel to the axis of the connecting post 32. At this time, the pull ring 33 is sleeved on the outside of the connecting post 32, thereby reducing the space occupied by the pull ring 33 and reducing the impact of the pull ring 33 on the operator's operation during the sewing process.

[0048] Reference Figure 4 and Figure 5The pull ring 33 has a rotating shaft 34 welded to both ends, and the axis of the rotating shaft 34 is perpendicular to the axis of the pull ring 33. A rotating groove 35 is provided on the connecting post 32 at the position corresponding to the rotating shaft 34. The rotating shaft 34 is inserted into the rotating groove 35 to realize the rotating connection between the pull ring 33 and the connecting post 32.

[0049] Reference Figure 4 and Figure 5 The connecting post 32 is also provided with a sliding groove 36, which extends circumferentially along the length of the connecting post 32. One end of the sliding groove 36 is connected to the rotating groove 35. The vertical distance between the two sides of the sliding groove 36 perpendicular to the axis of the connecting post 32 is less than the diameter of the rotating groove 35. The rotating shaft 34 is provided with two parallel sliding surfaces 37, which are parallel to the axis of the rotating shaft 34. When the axis of the pull ring 33 is parallel to the axis of the connecting post 32, the sliding surfaces 37 are perpendicular to the axis of the connecting post 32. When the axis of the pull ring 33 is perpendicular to the axis of the connecting post 32, the sliding surfaces 37 are flush with the two parallel sidewalls of the sliding groove 36. At this time, the rotating shaft 34 can enter the sliding groove 36 and rotate around the axis of the connecting post 32.

[0050] Reference Figure 4 and Figure 5 Rotating the pull ring 33 around the axis of the connecting post 32 allows the axis of the rotating shaft 34 to be perpendicular to or parallel to the sliding direction of the connecting post 32. Limiting grooves 38 are provided at both ends of the clearance hole 39, defining the rotation direction of the pull ring 33 as positive rotation when the rotating shaft 34 moves away from the rotating groove 35. Sliding the connecting post 32 to one end of the clearance hole 39, and with the axis of the rotating shaft 34 parallel to the sliding direction of the connecting post 32, rotating the pull ring 33 in the opposite direction (to the opposite direction of positive rotation) allows the end of the rotating shaft 34 away from the connecting post 32 to move into the limiting groove 38. After the rotating shaft 34 slides into the rotating groove 35, the side of the rotating shaft 34 abuts against the side wall of the limiting groove 38. Rotating the pull ring 33 makes its axis parallel to the axis of the connecting post 32, allowing the pull ring 33 to be folded and stored while limiting its rotation around the axis of the connecting post 32. At this time, the side wall of the clearance hole 39 perpendicular to its own length direction and the side wall of the limiting groove 38 can block the movement of the connecting column 32, thereby limiting the sliding of the connecting column 32 and improving the stability of the movable wheel 221 during use.

[0051] Reference Figure 6 and Figure 7A sliding assembly 4 is provided between the movable wheel 221 and the adjusting plate 31. The sliding assembly 4 includes a sliding block 41 and an elastic element 42. The sliding block 41 is slidably connected to the adjusting plate 31 in a direction parallel to the sliding direction of the adjusting plate 31, and the movable wheel 221 is rotatably connected to the sliding block 41. The elastic element 42 is mounted on the adjusting plate 31 and is used to apply a force to the sliding block 41 to move it closer to the fixed wheel 222. In this embodiment, the elastic element 42 is a spring, with one end welded to the adjusting plate 31 and the other end welded to the sliding block 41. Under the action of the elastic element 42, the movable wheel 221 can press against the sewing material and can also adapt to the unevenness of the sewing material to a certain extent. This improves the stability of the traction assembly 2 during the process of clamping the fabric.

[0052] Reference Figure 6 and Figure 7 The adjusting plate 31 has a receiving cavity 311 located on the side of the sliding block 41 away from the movable wheel 221. A drive assembly 5 for rotating multiple movable wheels 221 is installed inside the receiving cavity 311. The drive assembly 5 includes a fixed bevel gear set 51, a movable bevel gear set 52, and a linkage telescopic rod 53. The movable bevel gear set 52 is mounted on the sliding block 41. The movable bevel gear set 52 includes two meshing and rotatably connected bevel gears to the sliding block 41. One bevel gear is coaxial with and fixedly connected to the movable wheel 221; the axis of the other bevel gear is parallel to the sliding direction of the sliding block 41 and is located on the side of the sliding block 41 away from the fixed wheel 222. Rotation of the bevel gears can drive the movable wheel 221 to rotate. The fixed bevel gear set 51 is located on the side of the movable bevel gear set 52 away from the fixed wheel 222 along the sliding direction of the sliding block 41, and the axis of one of the bevel gears is parallel to the sliding direction of the sliding block 41. The linkage telescopic rod 53 is positioned parallel to the sliding direction of the sliding block 41 between the movable bevel gear set 52 and the fixed bevel gear set 51. The linkage telescopic rod 53 includes a sliding sleeve 532 and a sliding rod 531. The sliding sleeve 532 is mounted on the sliding rod 531 along its own length, enabling the extension and retraction of the linkage telescopic rod 53. The two ends of the sliding sleeve 532 and the sliding rod 531, which are far apart from each other, are welded to their corresponding bevel gears. The rotation of the bevel gear set in the fixed bevel gear set 51 drives the rotation of the bevel gear set in the movable bevel gear set 52. Simultaneously, under the action of the linkage telescopic rod 53, it can accommodate the sliding of the sliding block 41.

[0053] Reference Figure 6 and Figure 7The drive assembly 5 also includes a connecting shaft 54. Multiple fixed bevel gear sets 51, located away from the linkage telescopic rod 53, are coaxially arranged. The connecting shaft 54 ​​passes through multiple bevel gears and is rotatably connected to the side wall of the receiving cavity 311. Rotating the connecting shaft 54 ​​can drive multiple bevel gears to rotate simultaneously, thereby driving multiple movable wheels 221 to rotate simultaneously.

[0054] Reference Figure 6 and Figure 7 The drive assembly 5 also includes a spur gear set 55 and a drive member 56. The spur gear set 55 includes a spur gear 551 and an incomplete gear 552. The spur gear 551 is coaxially welded to one end of the connecting shaft 54. The incomplete gear 552 is rotatably connected to the side wall of the receiving cavity 311 and can mesh with the spur gear 551. The drive member 56 is used to drive the incomplete gear 552 to rotate. In this embodiment, the drive member 56 is a servo motor, and the output shaft of the servo motor is coaxially welded to the incomplete gear 552. The rotation of the incomplete gear 552 causes the connecting shaft 54 ​​to rotate intermittently, thereby driving the sewing fabric and the feed teeth of the sewing machine head 1 to move synchronously, improving the traction effect of the traction assembly 2 on the sewing fabric.

[0055] The implementation principle of the sewing machine feeding structure and its usage method in this application embodiment is as follows: When sewing soft and large-area fabric, the mounting plate 21 is rotated so that the axis of the movable wheel 221 is parallel to the sewing machine table, and the fabric is placed between the movable wheel 221 and the fixed wheel 222. As the sewing machine head 1 rotates, the servo motor is controlled by the PLC program to rotate, which in turn drives the incomplete gear 552 to rotate, realizing synchronous traction of the fabric, reducing the workload of the operator, and improving work efficiency.

[0056] This application also discloses a method for using a sewing machine feeding structure.

[0057] A method of using a feeding structure for a sewing machine includes:

[0058] Deploy the traction mechanism: Rotate the mounting plate 21 so that the mounting plate 21 is perpendicular to the sewing machine table. In this state, the axes of the movable wheel 221 and the fixed wheel 222 are parallel to the table.

[0059] Set the seam allowance:

[0060] Adjust the position of the movable wheel 221, and rotate the pull ring 33 around the axis of the rotating shaft 34 until the axis of the pull ring 33 is perpendicular to the axis of the connecting post 32. Then rotate the pull ring 33 around the axis of the connecting post 32 until the axis of the rotating shaft 34 is parallel to the sliding direction of the sliding block 41. At this time, pulling the pull ring 33 can drive the sliding block 41 away from the fixed wheel 222, and thus drive the movable wheel 221 away from the fixed wheel 222. When the connecting post 32 moves to the end of the clearance hole 39, rotate the pull ring 33 around the axis of the connecting post 32 so that the end of the rotating shaft 34 away from the connecting post 32 is inserted into the limiting groove 38. Then rotate the pull ring 33 around the axis of the rotating shaft 34 until the axis of the pull ring 33 is parallel to the connecting post 32. The rotating shaft 34 limits the rotation of the pull ring 33 around the axis of the connecting post 32, thereby limiting the connection post 32.

[0061] Place the sewing material, hold the sewing material in your hand, and place the sewing material between the movable wheel 221 and the fixed wheel 222.

[0062] Clamp the sewing material, rotate the pull ring 33 to adjust the position of the connecting post 32 to the end of the clearance groove near the fixed wheel 222, and then rotate the pull ring 33 so that the axis of the pull ring 33 is parallel to the connecting post 32, thereby limiting the position of the connecting post 32.

[0063] The implementation principle of the sewing machine feeding structure method in this application embodiment is as follows: the movable wheel 221 rotates, assisting the worker in pulling the sewing material on one side, thereby reducing the worker's workload and improving work efficiency.

[0064] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A feeding structure for a sewing machine, characterized in that, The device includes a traction assembly (2), which includes a traction wheel set (22) and a mounting plate (21). The mounting plate (21) is connected to the table of the sewing machine. The traction wheel set (22) includes a movable wheel (221) and a fixed wheel (222) rotatably connected to the mounting plate (21). A gap is provided between the movable wheel (221) and the fixed wheel (222) for the sewing material to pass through. The mounting plate (21) is also provided with a drive assembly (5) for the movable wheel (221) to rotate. A storage slot (23) is provided on the table surface. The mounting plate (21) is rotatably connected to the side wall of the storage slot (23). Rotating the mounting plate (21) allows the traction component (2) to be submerged in the storage slot (23), and at the same time, one side of the mounting plate (21) is flush with the sewing machine table surface. An adjustment component (3) is provided on the mounting plate (21). The adjustment component (3) includes an adjustment plate (31). The adjustment plate (31) is located between the movable wheel (221) and the mounting plate (21). The adjustment plate (31) is slidably connected to the mounting plate (21) in a direction perpendicular to the axis of the fixed wheel (222). The movable wheel (221) is connected to the adjustment plate (31). Sliding the adjustment plate (31) can drive the movable wheel (221) to move closer to or away from the fixed wheel (222). A sliding assembly (4) is provided between the movable wheel (221) and the adjusting plate (31). The sliding assembly (4) includes a sliding block (41) and an elastic element (42). The sliding block (41) is slidably connected to the adjusting plate (31) in a direction parallel to the sliding direction of the adjusting plate (31). The elastic element (42) is used to keep the sliding block (41) moving towards the fixed wheel (222). The adjusting plate (31) has a receiving cavity (311) inside, which is located on the side of the sliding block (41) away from the movable wheel (221). The receiving cavity (311) is provided with a drive assembly (5) for driving multiple movable wheels (221) to rotate. The drive assembly (5) includes a fixed bevel gear set (51), a movable bevel gear set (52), and a linkage telescopic rod (53). The linkage telescopic rod (53) is set between the movable bevel gear set (52) and the fixed bevel gear set (51) parallel to the sliding direction of the sliding block (41); the linkage telescopic rod (53) includes a sliding sleeve (532) and a sliding rod (531). The sliding sleeve (532) is set on the sliding rod (531) along its own length direction to realize the extension and retraction of the linkage telescopic rod (53); The drive assembly (5) also includes a connecting shaft (54), and the fixed bevel gear set (51) includes two bevel gears that are distributed vertically and mesh with each other. The upper bevel gear in the fixed bevel gear set (51) is connected to the outer periphery of the connecting shaft (54), and the lower bevel gear in the fixed bevel gear set (51) is connected to the upper end of the sliding sleeve (532). The movable bevel gear set (52) includes two bevel gears that are distributed vertically and mesh with each other. The lower bevel gear in the movable bevel gear set (52) is rotatably connected to the sliding block (41) and is coaxially fixedly connected to the movable wheel (221). The axis of the upper bevel gear in the movable bevel gear set (52) is parallel to the sliding direction of the sliding block (41) and is connected to the lower end of the sliding rod (531), located on the side of the sliding block (41) away from the fixed wheel (222). The rotation of the bevel gear in the fixed bevel gear set (51) can drive the rotation of the bevel gear in the movable bevel gear set (52), and at the same time, under the action of the linkage telescopic rod (53), it can adapt to the sliding of the sliding block (41) in terms of movement. The upper bevel gears in the multiple fixed bevel gear sets (51) are all located on the outer periphery of the connecting shaft (54) and are rotatably connected to the side wall of the receiving cavity (311); rotating the connecting shaft (54) can drive the multiple fixed bevel gear sets (51) to rotate, thereby driving the corresponding multiple movable bevel gear sets (52) to rotate, and finally driving the corresponding multiple movable wheels (221) to rotate simultaneously. The drive assembly (5) also includes a spur gear set (55) and a drive member (56). The spur gear set (55) includes a spur gear (551) and an incomplete gear (552). The spur gear (551) is coaxially welded to one end of the connecting shaft (54). The incomplete gear (552) is rotatably connected to the side wall of the receiving cavity (311) and can mesh with the spur gear (551). The drive member (56) is used to drive the incomplete gear (552) to rotate. The drive member (56) is a servo motor, and the output shaft of the servo motor is coaxially welded to the incomplete gear (552).

2. The sewing machine feeding structure according to claim 1, characterized in that, The adjustment assembly (3) further includes a connecting post (32) and a pull ring (33). One end of the connecting post (32) is vertically welded to the adjustment plate (31), and the other end extends away from the adjustment plate (31) and is flush with the side of the mounting plate (21) away from the adjustment plate (31). The pull ring (33) is connected to the connecting post (32). The mounting plate (21) has a clearance hole (39) for the connecting post (32) to move with the adjustment plate (31).

3. The sewing machine feeding structure according to claim 2, characterized in that, The pull ring (33) is a semi-circular ring structure. Rotating shafts (34) are provided at both ends of the pull ring (33). The axis of the rotating shaft (34) is perpendicular to the axis of the pull ring (33). A rotating groove (35) is provided on the connecting column (32). The end of the rotating shaft (34) away from the pull ring (33) is inserted into the rotating groove (35) and can rotate around its own axis.

4. The sewing machine feeding structure according to claim 3, characterized in that, The end of the rotating shaft (34) away from the connecting post (32) extends to the outside of the pull ring (33). The connecting post (32) is cylindrical. The rotating shaft (34) can rotate around the axis of the connecting post (32). Rotating the rotating shaft (34) around the axis of the connecting post (32) can make the axis of the rotating shaft (34) parallel or perpendicular to the moving direction of the connecting post (32). The clearance hole (39) has a limit groove (38) at both ends of the sliding direction of the connecting post (32). When the end of the rotating shaft (34) away from the connecting post (32) rotates from a state parallel to the sliding direction of the connecting post (32) to a state perpendicular to the sliding direction, it can be inserted into the limit groove (38).

5. The sewing machine feeding structure according to claim 4, characterized in that, The connecting column (32) is also provided with a sliding groove (36). The length direction of the sliding groove (36) extends along the circumference of the connecting column (32), and one end is connected to the rotating groove (35). The rotating shaft (34) can enter the sliding groove (36).

6. The sewing machine feeding structure according to claim 5, characterized in that, The vertical distance between the two sides of the sliding groove (36) perpendicular to the axis of the connecting column (32) is less than the diameter of the rotating groove (35). At the same time, two sliding surfaces (37) are opened on the rotating shaft (34). When the axis of the pull ring (33) is perpendicular to the axis of the connecting column (32), the two sliding surfaces (37) are flush with the two sides of the sliding groove (36) perpendicular to the axis of the connecting column (32).

Images