A clamping and positioning mechanism for sewing double fabric pieces by a sewing machine

Abstract

The application relates to the sewing machine technical field and discloses a clamping and positioning mechanism for sewing two pieces of cloth by a sewing machine, which comprises a workbench and a sewing machine fixedly connected to the upper surface of the workbench. A sliding groove is formed in the length direction of the workbench, and a supporting assembly is arranged in the sliding groove. The supporting assembly comprises a sliding block which is slidingly connected to the workbench. The clamping and positioning mechanism for sewing two pieces of cloth by the sewing machine is provided with a first cylinder and a second cylinder in a driving assembly, so that the position of a pressing disc can be adjusted, and the mechanism can be suitable for cloth of different sizes. The second cylinder drives the pressing disc to clamp two pieces of cloth between a lower turntable and the pressing disc. The cloth is rotated by cooperation of a motor, and the sewing machine is cooperated with the cloth, so that the cloth can be circumferentially sewn, the stability of the cloth rotation is ensured, the stitches are uniform and neat, and the sewing quality is improved.

Description

Technical Field

[0001] This application relates to the field of sewing machine technology, specifically a clamping and positioning mechanism for sewing two pieces of fabric together in a sewing machine. Background Technology

[0002] In the field of sewing machine technology, the sewing of round or near-round parts is a common and important process in the processing and manufacturing of various garments and accessories, such as the production of common round hats. When making a round hat, the lining fabric and the outer fabric are usually layered and then sewn together to form a finished product with a certain structure and appearance.

[0003] However, when performing double-piece sewing of such circular components, existing common sewing machines often rely on workers to manually push the fabric to rotate, thus achieving circumferential sewing. Manually pushing the fabric to rotate makes it difficult to ensure the smoothness and uniformity of the rotation. Because it is difficult for workers to precisely control the force and speed of operation, the fabric may experience uneven rotation speed and deviation in rotation direction during the pushing process. This leads to uneven and messy stitches, seriously affecting the quality and appearance of the finished product. The stitch length may vary, and the stitches may be crooked or twisted, greatly reducing the aesthetics of finished products such as hats, and may even affect their performance due to sewing quality problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a clamping and positioning mechanism for sewing two pieces of fabric together in a sewing machine, which has advantages such as assisting in sewing and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a clamping and positioning mechanism for sewing two pieces of fabric in a sewing machine, comprising a worktable and a sewing machine fixedly connected to the upper surface of the worktable, wherein the worktable is provided with a slide groove along its length direction, and a support component is provided inside the slide groove, the support component including a slider, the slider being slidably connected to the worktable, and a lower turntable being rotatably connected to the upper surface of the slider. The sewing machine is equipped with a drive assembly on its upper surface. The drive assembly includes a first cylinder, which is arranged along the length of the worktable. A second cylinder is installed at the output end of the first cylinder, which is arranged along the height of the worktable. A motor is fixedly installed at the output end of the second cylinder. A pressure column is fixedly installed at the output end of the motor, which is arranged along the height of the worktable. A pressure plate is fixedly connected to the bottom end of the pressure column. A set of auxiliary pressing components is provided on the outer surface of the pressure plate; The auxiliary pressing assembly includes a set of sleeves, each sleeve is fixedly connected to the pressure plate, each sleeve is horizontally arranged along the radial direction of the pressure plate, and each sleeve is slidably connected to a pressing block along its length, with the bottom end of the pressing block and the bottom of the pressure plate at the same level. The auxiliary pressing assembly also includes an adjusting cylinder that is slidably sleeved with the pressing column. A set of connecting rods is hinged to the outer surface of the adjusting cylinder, and the other end of each connecting rod is hinged to its corresponding pressing block.

[0006] Furthermore, two shaft blocks are fixedly connected to the bottom of the worktable, and a lead screw arranged along the length of the worktable is rotatably connected between the two shaft blocks. The slider is threadedly connected to the lead screw, and one end of the lead screw is fixedly connected to the output end of an external motor through a coupling.

[0007] The above solution uses a motor to drive the lead screw to rotate, which in turn causes the slider to move linearly along the lead screw, thus achieving precise adjustment of the position of the lower turntable. This allows for easy adjustment of the relative position of the lower turntable and the sewing machine according to different fabric sizes, improving the convenience and accuracy of operation.

[0008] Furthermore, the upper surface of the workbench is coated with a smooth, drag-reducing coating.

[0009] The above solution specifically employs a polytetrafluoroethylene (PTFE) coating to reduce wear on the fabric during rotation, preventing fuzzing or damage to the fabric surface due to friction. It also reduces resistance, making the fabric rotate more smoothly and improving sewing efficiency and quality.

[0010] Furthermore, the outer surface of the sewing machine is equipped with a bonding component arranged along the height direction of the workbench. The bonding component includes an adjustment frame arranged along the height direction of the workbench, an adjustment rod slidably inserted into the adjustment frame along its height direction, a pressure roller rotatably connected to the bottom end of the adjustment rod along its radial horizontal direction, and a screw threadedly connected to one side of the adjustment frame along its radial horizontal direction.

[0011] With the above solution, after adjusting the height of the pressure roller and the worktable, the adjusting rod can be fixed by the contact and pressing of the screw and the adjusting rod, thereby fixing the position of the pressure roller and ensuring that the pressure roller can stably level the fabric during operation.

[0012] Furthermore, the outer surface of the pressure column is provided with a set of linearly arranged insertion holes, and the sleeve is slidably inserted with a insertion rod in its radial horizontal direction, and the insertion rod is inserted into its corresponding insertion hole.

[0013] By inserting the insertion rod into the insertion hole at different positions, the position of the sleeve on the pressure column can be changed, thereby adjusting the overall position of the auxiliary pressing component to adapt to the pressing requirements of fabrics of different sizes and improve the versatility of the equipment.

[0014] Furthermore, two guide plates are fixedly connected to the outer surface of the first cylinder, and two guide rods are fixedly connected to the outer surface of the second cylinder, with the two guide rods slidably inserted into their corresponding guide plates.

[0015] With the above scheme, the guide rod slides inside the guide plate, which can provide guidance for the movement of the second cylinder, ensure the straightness of the second cylinder when it moves under the drive of the first cylinder, and enable the pressure plate to move accurately to the position coaxial with the lower turntable, thereby improving the stability and accuracy of the equipment operation.

[0016] Furthermore, anti-slip grooves are provided on the bottom of the pressure plate and the bottom of each pressure block.

[0017] The above method increases the friction between the pressure plate and the fabric, preventing the fabric from slipping during rotation and ensuring that the fabric rotates stably with the lower turntable and pressure plate, thus guaranteeing sewing quality.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects: This clamping and positioning mechanism for sewing two pieces of fabric in a sewing machine, through the setting of the first and second cylinders in the drive assembly, realizes the adjustment of the pressure plate position, which can be used for fabrics of different sizes. The second cylinder drives the pressure plate to clamp the two pieces of fabric between the lower turntable and the pressure plate. With the rotation of the motor, the fabric is rotated and cooperates with the sewing machine to realize the circumferential sewing of the fabric, ensuring the stability of the fabric rotation, and producing uniform and neat stitches, thus improving the sewing quality. The height of the adjustable cylinder is changed to drive the connecting rod to move, which in turn allows the pressure block to slide inside the sleeve. This allows for flexible changes in the positional relationship between the pressure block and the center of the pressure plate, making it suitable for auxiliary fixing of fabrics of different sizes. It also prevents wrinkles from occurring during rotation, further ensuring the quality of the sewing. The pressure roller in the bonding assembly can flatten the area of ​​fabric to be sewn during the fabric rotation process, preventing wrinkles or unevenness in the fabric, ensuring the flatness of the fabric at the sewing area, and further improving the sewing quality. The adjusting rod is fixed by the contact and squeezing between the screw and the adjusting rod, thereby fixing the position of the pressure roller, which is suitable for fabrics of different thicknesses. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 2 ; Figure 3 This is a structural diagram of the driving component and the auxiliary overlay component of this application; Figure 4 This is a structural diagram of the bonding component in this application; Figure 5 This is a structural diagram of the supporting component in this application.

[0020] In the picture: 1. Workbench; 2. Sewing machine; 3. Slide rail; 4. Supporting components; 401. Slider; 402. Lower turntable; 5. Drive assembly; 501. First cylinder; 502. Second cylinder; 503. Motor; 504. Pressure column; 505. Pressure plate; 6. Auxiliary pressing assembly; 601. Sleeve; 602. Pressing block; 603. Adjusting cylinder; 604. Connecting rod; 7. Shaft block; 8. Lead screw; 9. Bonding assembly; 901. Adjusting rod; 902. Pressure roller; 903. Screw; 904. Adjusting frame; 10. Guide plate; 11. Guide rod; 12. Insertion hole; 13. Insertion rod. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Please see Figures 1-5 This embodiment discloses a clamping and positioning mechanism for sewing two pieces of fabric together in a sewing machine. It includes a worktable 1 and a sewing machine 2 fixedly connected to the upper surface of the worktable 1. The worktable 1 has a groove 3 along its length, and a support assembly 4 is disposed inside the groove 3. The support assembly 4 includes a slider 401, which is slidably connected to the worktable 1. A lower turntable 402 is rotatably connected to the upper surface of the slider 401. By adjusting the distance between the lower turntable 402 and the output end of the sewing machine 2 using the slider 401, it can be adapted to fabrics of different diameters, ensuring that when sewing circular or near-circular fabrics of different sizes, the lower turntable 402... Both can be positioned appropriately to ensure the stability of fabric placement and rotation. Two shaft blocks 7 are fixedly connected to the bottom of the worktable 1. A lead screw 8 is rotatably connected between the two shaft blocks 7 along the length of the worktable 1. The slider 401 is threadedly connected to the lead screw 8. One end of the lead screw 8 is fixedly connected to the output end of an external motor through a coupling. The motor drives the lead screw 8 to rotate, which in turn drives the slider 401 to move linearly along the lead screw 8, thereby achieving precise adjustment of the position of the lower turntable 402. This facilitates the adjustment of the relative position of the lower turntable 402 and the sewing machine 2 according to different fabric sizes, improving the convenience and accuracy of operation.

[0023] The upper surface of the workbench 1 is coated with a smooth, friction-reducing coating, specifically a polytetrafluoroethylene (PTFE) coating. This reduces wear on the fabric during rotation, preventing fuzzing or damage due to friction. It also reduces resistance, allowing for smoother fabric rotation and improving sewing efficiency and quality. The upper surface of the sewing machine 2 is equipped with a drive assembly 5, which includes a first cylinder 501 positioned along the length of the workbench 1. A second cylinder 502, positioned along the height of the workbench 1, is mounted at the output end of the first cylinder 501. A motor 503 is fixedly mounted at the output end of the second cylinder 502. A pressure column 504, positioned along the height of the workbench 1, is fixedly mounted at the output end of the motor 503. The pressure column 504 is connected to the motor 503 via a coupling, ensuring stable power transmission from the motor 503 to the pressure column 504, causing the pressure column 504 to rotate with the motor 503. A pressure plate 505 is fixedly connected to the bottom end of the pressure column 504.

[0024] A set of auxiliary pressing components 6 are provided on the outer surface of the pressure plate 505. The auxiliary pressing components 6 include a set of sleeves 601. Each sleeve 601 is fixedly connected to the pressure plate 505. Each sleeve 601 is horizontally arranged along the radial direction of the pressure plate 505. Each sleeve 601 is slidably connected to a pressing block 602 along its length. The bottom end of the pressing block 602 is at the same level as the bottom of the pressure plate 505. The position of the pressure plate 505 can be adjusted by driving the second cylinder 502 to move through the first cylinder 501, so that the pressure plate 505 is coaxially arranged with the lower turntable 402. Then, the pressure plate 505 is driven by the second cylinder 502 to clamp the two pieces of fabric between the lower turntable 402 and the pressure plate 505. The rotation of the motor 503 can drive the fabric to rotate, and cooperate with the sewing machine 2 to realize the circumferential sewing of the fabric, ensuring that the fabric can remain stable during rotation and the sewn stitches are uniform and neat.

[0025] The auxiliary pressing assembly 6 also includes an adjusting cylinder 603 that is slidably sleeved with the pressing column 504. A set of connecting rods 604 are hinged to the outer surface of the adjusting cylinder 603. The other end of each connecting rod 604 is hinged to its corresponding pressing block 602. By moving the height of the adjusting cylinder 603, the connecting rods 604 are moved, thereby causing the pressing block 602 to slide within the sleeve 601, changing the positional relationship between the pressing block 602 and the center of the pressing plate 505. This is suitable for auxiliary pressing of fabrics of different diameters, ensuring that effective pressing force can be provided for fabrics of various sizes. A set of linearly arranged insertion holes 12 are opened on the outer surface of the pressing column 504. Insertion rods 13 are slidably inserted into the sleeve 601 along its radial horizontal direction. Insertion rods 13 are inserted into their corresponding insertion holes 12. Insertion rods 13 are inserted into insertion holes 12 at different positions, which can change the position of the sleeve 601 on the pressing column 504, thereby adjusting the overall position of the auxiliary pressing assembly 6 to adapt to the pressing requirements of fabrics of different sizes and improve the versatility of the equipment.

[0026] The outer surface of the sewing machine 2 is equipped with a bonding component 9 arranged along the height direction of the worktable 1. The bonding component 9 includes an adjusting frame 904, which is arranged along the height direction of the worktable 1. An adjusting rod 901 is slidably inserted into the adjusting frame 904 along its height direction. The bottom end of the adjusting rod 901 is rotatably connected to a pressure roller 902 in its radial horizontal direction. During the rotation of the fabric, the pressure roller 902 can flatten the area of ​​the fabric to be sewn, prevent the fabric from wrinkling or being uneven, ensure the fabric at the sewing part is flat, and improve the sewing quality. One side of the adjusting frame 904 is threaded with a screw 903 arranged in its radial horizontal direction. After the height of the pressure roller 902 and the worktable 1 is adjusted, the adjusting rod 901 can be fixed by the screw 903 abutting and pressing against it, thereby fixing the position of the pressure roller 902 and ensuring that the pressure roller 902 can stably flatten the fabric during operation.

[0027] Two guide plates 10 are fixedly connected to the outer surface of the first cylinder 501, and two guide rods 11 are fixedly connected to the outer surface of the second cylinder 502. The two guide rods 11 are slidably inserted into their corresponding guide plates 10. The guide rods 11 slide within the guide plates 10, providing guidance for the movement of the second cylinder 502 and ensuring the straightness of the second cylinder 502 when it moves under the drive of the first cylinder 501. This allows the pressure plate 505 to move accurately to a position coaxial with the lower turntable 402, improving the stability and accuracy of the equipment operation. Anti-slip grooves 3 are provided at the bottom of the pressure plate 505 and the bottom of each pressure block 602 to increase the friction between the pressure plate 505 and the pressure block 602 and the fabric, preventing the fabric from sliding during rotation and ensuring that the fabric can rotate stably with the lower turntable 402 and the pressure plate 505, thus guaranteeing the sewing quality.

[0028] The working principle of the above embodiment is as follows: First, adjust the position of the lower turntable 402 according to the fabric size. The motor drives the lead screw 8 to rotate. Since the slider 401 is threadedly connected to the lead screw 8 and slides in the slide groove 3 of the worktable 1, the slider 401 moves linearly along the lead screw 8, driving the lower turntable 402 connected to it to move, so that the lower turntable 402 and the output end of the sewing machine 2 maintain a suitable distance to adapt to fabrics of different diameters and ensure the stability of fabric placement and rotation. The fabric stack is placed on the lower turntable 402. The first cylinder 501 drives the second cylinder 502 to move along the length direction of the worktable 1. The guide rod 11 slides in the guide plate 10 to ensure the linearity of the movement of the second cylinder 502, so that the pressure plate 505 can accurately move to the coaxial position with the lower turntable 402. Then, the second cylinder 502 drives downward along the height direction of the worktable 1, and the motor 503 descends accordingly. The pressure column 504 at the output end of the motor 503 drives the pressure plate 505 to press down, clamping the two pieces of fabric between the lower turntable 402 and the pressure plate 505. If it is necessary to adjust the auxiliary pressing component 6 to accommodate different sizes of fabric, the height of the adjusting cylinder 603 can be moved. The adjusting cylinder 603 drives the pressing block 602 to slide inside the sleeve 601 through the hinged connecting rod 604, changing the positional relationship between the pressing block 602 and the center of the pressure plate 505, so that the pressing block 602 can provide effective pressing force for different sizes of fabric. At the same time, according to the size of the fabric, the insert on the sleeve 601 can be adjusted. The rod 13 is inserted into the insertion holes 12 at different positions of the pressure column 504 to adjust the overall position of the auxiliary pressing component 6. After the fabric is clamped, the motor 503 rotates, driving the pressure column 504 and the pressure plate 505 to rotate. The lower turntable 402 also rotates accordingly. The two pieces of fabric rotate stably under the action of the pressure plate 505 and the lower turntable 402. At this time, the sewing machine 2 works to realize the circumferential sewing of the fabric. During the rotation of the fabric, the pressure roller 902 of the bonding component 9 flattens the area of ​​the fabric to be sewn to prevent wrinkles. By rotating the screw 903 and pressing against the adjusting rod 901, the position of the pressure roller 902 can be fixed to ensure the flattening effect and guarantee the sewing quality.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping and positioning mechanism for sewing two pieces of fabric together in a sewing machine, comprising a worktable (1) and a sewing machine (2) fixedly connected to the upper surface of the worktable (1), characterized in that: The workbench (1) has a slide groove (3) along its length. A support assembly (4) is provided inside the slide groove (3). The support assembly (4) includes a slider (401). The slider (401) is slidably connected to the workbench (1). A lower turntable (402) is rotatably connected to the upper surface of the slider (401). The sewing machine (2) has a drive assembly (5) installed on its upper surface. The drive assembly (5) includes a first cylinder (501) which is arranged along the length of the workbench (1). The output end of the first cylinder (501) is equipped with a second cylinder (502) which is arranged along the height of the workbench (1). The output end of the second cylinder (502) is fixedly equipped with a motor (503). The output end of the motor (503) is fixedly equipped with a pressure column (504) which is arranged along the height of the workbench (1). The bottom end of the pressure column (504) is fixedly connected to a pressure plate (505). A set of auxiliary pressing components (6) is provided on the outer surface of the pressure plate (505); The auxiliary pressing assembly (6) includes a set of sleeves (601), each sleeve (601) is fixedly connected to the pressure plate, each sleeve (601) is horizontally arranged in the radial direction of the pressure plate, and each sleeve (601) is slidably connected to a pressing block (602) in the length direction, the bottom end of the pressing block (602) is at the same level as the bottom of the pressure plate (505); The auxiliary pressing assembly (6) also includes an adjusting cylinder (603) that is slidably sleeved with the pressing column (504). A set of connecting rods (604) are hinged to the outer surface of the adjusting cylinder (603), and the other end of each connecting rod (604) is hinged to its corresponding pressing block (602).

2. The clamping and positioning mechanism for sewing two pieces of fabric in a sewing machine according to claim 1, characterized in that: The bottom of the worktable (1) is fixedly connected to two shaft blocks (7), and a lead screw (8) is rotatably connected between the two shaft blocks (7) along the length of the worktable (1). The slider (401) is threadedly connected to the lead screw (8), and one end of the lead screw (8) is fixedly connected to the output end of an external motor through a coupling.

3. The clamping and positioning mechanism for sewing two pieces of fabric in a sewing machine according to claim 1, characterized in that: The upper surface of the workbench (1) is coated with a smooth, drag-reducing coating.

4. The clamping and positioning mechanism for sewing two pieces of fabric in a sewing machine according to claim 1, characterized in that: The sewing machine (2) is equipped with a bonding component (9) arranged along the height direction of the workbench (1) on its outer surface. The bonding component (9) includes an adjustment frame (904) arranged along the height direction of the workbench (1). An adjustment rod (901) is slidably inserted into the adjustment frame (904) along its height direction. A pressure roller (902) is rotatably connected to the bottom end of the adjustment rod (901) along its radial horizontal direction. A screw (903) is threadedly connected to one side of the adjustment frame (904) along its radial horizontal direction.

5. The clamping and positioning mechanism for sewing two pieces of fabric in a sewing machine according to claim 1, characterized in that: The outer surface of the pressure column (504) is provided with a set of linearly arranged insertion holes (12), and the sleeve (601) is slidably inserted with a rod (13) in its radial horizontal direction. The rod (13) is inserted into its corresponding insertion hole (12).

6. The clamping and positioning mechanism for sewing two pieces of fabric in a sewing machine according to claim 1, characterized in that: The outer surface of the first cylinder (501) is fixedly connected to two guide plates (10), and the outer surface of the second cylinder (502) is fixedly connected to two guide rods (11). The two guide rods (11) are slidably inserted into their corresponding guide plates (10).

7. The clamping and positioning mechanism for sewing two pieces of fabric in a sewing machine according to claim 1, characterized in that: The bottom of the pressure plate (505) and the bottom of each pressure block (602) are provided with anti-slip grooves (3).

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