Feeding mechanism of pattern sewing machine

Abstract

A feeding mechanism of a pattern sewing machine comprises a base, protective shells are fixedly connected to the two sides of the front end and the rear end of the outer wall of the base correspondingly, air cylinders are arranged on the inner walls of the sides, away from the base, of the protective shells correspondingly, connecting blocks are fixedly connected to the output ends of the air cylinders correspondingly, and guide columns are fixedly connected to the ends, away from the base, of the connecting blocks correspondingly; the ends, away from the base, of the guide columns are fixedly connected with supporting columns, and the upper ends of the supporting columns are fixedly connected with movable frames. By optimizing the structure, the cloth collecting roller on one side is used for winding unsewn cloth, the cloth collecting roller on the other side is used for winding sewn cloth, the motor is started through an external controller, the cloth collecting rollers rotate to drive the cloth to move horizontally on the base, the two flattening devices are additionally arranged at the two ends of the base respectively, the flattening devices start air cylinders through the external controller, and then the cloth is flattened. The sliding block and the bearing column which are connected with the sliding groove in a sliding mode also conduct front-back translation, and the bearing column is rotationally connected with the mounting block through the force arm.

Description

Technical Field

[0001] This utility model relates to the field of feeding mechanisms, and more particularly to a feeding mechanism for a pattern sewing machine. Background Technology

[0002] In the field of feeding mechanisms, the feeding mechanism of a pattern sewing machine plays a crucial role in sewing machinery. Its significance lies in ensuring the stable movement of the fabric during sewing through feeding control, thereby achieving high-quality and efficient sewing results and meeting the sewing needs of various fabrics and complex stitches. The overall trend of intelligent, flexible, and efficient development in the sewing machinery industry benefits from policy support and technological innovation. Feeding mechanisms are continuously optimized in terms of structural design, motion control, and material adaptability. For example, differential feeding technology solves the sewing challenges of elastic and thick fabrics, and combined with digital control technology, it improves precision, providing solid technical support for the high-quality development of the sewing industry.

[0003] In existing technologies, the feeding mechanism relies on a single-point contact conveying between the feed teeth and the fixed presser foot. This is insufficient for controlling thin, wrinkle-prone, or elastic fabrics, resulting in wrinkles, stretching deformation, or edge deviation of the fabric during sewing, which seriously affects the pattern reproduction. For long fabrics or continuous sewing operations, the mechanism lacks dynamic control over the fabric feeding tension, requiring frequent manual adjustment of the fabric roller speed or presser foot pressure, resulting in low efficiency and poor consistency.

[0004] To address the aforementioned technical pain points, some existing technical solutions attempt to add simple guide plates or manual alignment devices to the feeding mechanism of pattern sewing machines to assist operators in supporting and aligning the fabric when sewing long fabrics and symmetrical patterns. However, such improvements still fall short in the following ways: when processing long fabrics such as curtains and sheets, the fabric's deviation due to its own weight or uneven feeding tension requires manual control of both sides of the edges throughout the process. This not only requires multiple auxiliary personnel for single-station operations, increasing labor costs, but also makes it difficult for manual support to keep up with the high-speed sewing rhythm.

[0005] In view of the above, it is necessary to make reasonable improvements to the existing fabric conveying and flattening devices. By setting up a double-roller linkage and automatic control of the flattening device, the fabric conveying and flattening process is automated, reducing manual operation. In the sewing process of long fabrics such as curtains and bed sheets, there is no need for manual support of the fabric at all times. It can also automatically keep the fabric aligned for symmetrical pattern sewing, and the production efficiency is improved compared with traditional mechanisms. Utility Model Content

[0006] The objective of this invention is to provide a convenient and stable feeding mechanism, and to provide a device for flattening the fabric so that it does not produce excessive wrinkles or unevenness during the sewing process, thereby improving the sewing effect.

[0007] The present invention accomplishes its objective as follows: a feeding mechanism for a pattern sewing machine, comprising: a base; protective shells fixedly connected to both the front and rear ends of the outer wall of the base; cylinders provided on the inner walls of the protective shells on the side away from the base; connecting blocks fixedly connected to the output ends of the cylinders; guide columns fixedly connected to the ends of the connecting blocks away from the base; support columns fixedly connected to the ends of the guide columns away from the base; movable frames fixedly connected to the upper ends of the support columns; sliding grooves provided on both sides of the outer wall of the movable frames; sliders slidably connected to the inner walls of the sliding grooves; bearing columns fixedly connected to adjacent ends of the sliders; mounting blocks fixedly connected to the middle of the upper surface of the protective shells; and lever arms rotatably connected to the front and rear ends of both sides of the mounting blocks.

[0008] In a specific embodiment of this utility model, pressure blocks are fixedly connected to the lower surface of each support column near the base. The pressure blocks are in direct contact with the fabric and can tightly adhere to the fabric surface under the drive of the cylinder, effectively preventing wrinkles or unevenness in the fabric during the sewing process.

[0009] In another specific embodiment of this utility model, the inner wall of the protective shell and the cylinder are both fixed by bolts. Bolt connection is a detachable mechanical connection method, which facilitates the quick disassembly and reinstallation of the cylinder during the installation, debugging, maintenance and replacement of the equipment. This allows maintenance personnel to easily inspect, clean or replace the cylinder without complicated tools or welding operations, thereby greatly improving the maintenance efficiency of the equipment.

[0010] In another specific embodiment of this utility model, the upper end of each lever arm is rotatably connected to a supporting column. Through this rotatable connection, the pressure block can be flexibly adjusted vertically. This design allows the pressure block to precisely adjust its distance from the base according to the fabric thickness and sewing requirements, ensuring the pressure block fits tightly against the fabric and achieves optimal flattening.

[0011] In another specific embodiment of this utility model, columns are fixedly connected to the front and rear ends of both sides of the upper surface of the base. These columns, acting as support components, are fixedly connected to the front and rear ends of the base, providing a stable support frame for the entire feeding mechanism. This design ensures that the fabric collecting roller and other related components remain stable during operation, preventing structural deformation or displacement caused by vibration or external forces, thereby guaranteeing the smoothness and consistency of fabric conveying.

[0012] In another specific embodiment of this invention, fabric collecting rollers are rotatably connected to the upper parts of adjacent ends of the column. These rollers, mounted rotatably on the upper part of the column, enable efficient fabric transport. One side of the collecting roller is used to wind unsewn fabric, while the other side is used to wind sewn fabric. This design allows the fabric to be smoothly transported from one collecting roller to another during the sewing process, ensuring the continuity and stability of the sewing process.

[0013] In a further specific embodiment of this utility model, a servo motor is fixedly connected to the upper part of the side wall of the column near the rear end. The servo motor can achieve high-precision speed and position control. By fixing the servo motor to the rear end of the column, the rotation of the fabric collecting roller can be controlled, thereby achieving smooth and uniform fabric feeding. This precise control is particularly important for complex pattern sewing, ensuring that the tension and speed of the fabric remain consistent throughout the sewing process, avoiding sewing quality problems caused by uneven fabric feeding.

[0014] In a further specific embodiment of this utility model, the output end of the servo motor passes through the column and is fixedly connected to the fabric collection roller. This not only achieves efficient and precise power transmission, simplifies the mechanical structure, and enhances the system's response speed, but also reduces mechanical wear and significantly improves the overall performance of the equipment.

[0015] The beneficial effects of this utility model are as follows: First, this technical solution optimizes the structure. One side of the fabric gathering roller is used to wrap the unsewn fabric, and the other side of the fabric gathering roller is used to wrap the sewn fabric. The motor is started by an external controller, which makes the fabric gathering roller rotate and drive the fabric to move horizontally on the base. Two flattening devices are added to each end of the base. The flattening device is started by a cylinder by an external controller, which drives the support column to move horizontally back and forth. The slider and the bearing column, which are slidably connected to the slide groove, also move horizontally back and forth. The bearing column is rotatably connected to the mounting block through a lever arm. During the back and forth movement, the distance between the pressure block and the base can be controlled until the pressure block can fit tightly against the fabric. This can effectively prevent the fabric from moving randomly or wrinkling during the sewing process, ensuring the flatness and consistency of the sewing effect, and improving the sewing quality and efficiency of the pattern sewing machine. Attached Figure Description

[0016] Figure 1 This is an isometric view of the present invention in a horizontal position;

[0017] Figure 2 This is an exploded view of the present invention in a horizontal position;

[0018] Figure 3 This is a top view of the present invention when it is in a horizontal position;

[0019] Figure 4This is a front view of the present invention when it is in a horizontal position;

[0020] Figure 5 This is a side view of the present invention when it is in a horizontal position.

[0021] In the diagram: 1. Base; 2. Column; 3. Fabric collecting roller; 4. Servo motor; 5. Protective shell; 6. Cylinder; 7. Connecting block; 8. Guide column; 9. Support column; 10. Movable frame; 11. Slide groove; 12. Slider; 13. Bearing column; 14. Mounting block; 15. Lever arm; 16. Pressure block. Detailed Implementation

[0022] The following will provide a detailed description by way of embodiments. However, the description of the embodiments is not intended to limit the present utility model. Any formal but not substantive equivalent transformations made based on the present utility model concept should be considered within the scope of the present utility model's technical solution.

[0023] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back refer to the current situation. Figure 1 The description pertains to the location and state of the object, and therefore should not be construed as a specific limitation on the technical solution provided by this utility model.

[0024] Please see Figure 1 and Figure 2 This utility model relates to a feeding mechanism for a pattern sewing machine, comprising: a base 1, with protective shells 5 fixedly connected to both the front and rear sides of the outer wall of the base 1, cylinders 6 being provided on the inner wall of the protective shells 5 away from the base 1, connecting blocks 7 being fixedly connected to the output ends of the cylinders 6, guide columns 8 being fixedly connected to the end of the connecting blocks 7 away from the base 1, support columns 9 being fixedly connected to the end of the guide columns 8 away from the base 1, movable frames 10 being fixedly connected to the upper end of the support columns 9, sliding grooves 11 being provided on both sides of the outer wall of the movable frames 10, sliders 12 being slidably connected to the inner wall of the sliding grooves 11, bearing columns 13 being fixedly connected to adjacent ends of the sliders 12, and mounting blocks 14 being fixedly connected to the middle of the upper surface of the protective shells 5, with lever arms 15 rotatably connected to the front and rear ends of both sides of the mounting blocks 14.

[0025] like Figures 1-2As shown, the fabric gathering roller 3 on one side is used to wrap the unsewn fabric, and the fabric gathering roller 3 on the other side is used to wrap the sewn fabric. The motor is started by an external controller, which makes the fabric gathering roller 3 rotate and drive the fabric to move horizontally on the base 1. Two flattening devices are added to each end of the base 1. The flattening devices start the cylinder 6 through the external controller, which drives the support column 9 to move horizontally back and forth. The slider 12 and the bearing column 13, which are slidably connected to the slide groove 11, also move horizontally back and forth. The bearing column 13 is rotatably connected to the mounting block 14 through the lever arm 15. During the back and forth movement, the distance between the pressure block 16 and the base 1 can be controlled until the pressure block 16 can fit tightly against the fabric. This design can effectively prevent the fabric from moving randomly or wrinkling during the sewing process, ensuring the flatness and consistency of the sewing effect, and improving the sewing quality and efficiency of the pattern sewing machine.

[0026] Furthermore, pressure blocks 16 are fixedly connected to the lower surface of the support column 13 near the base 1, and the inner wall of the protective shell 5 is fixed to the cylinder 6 by bolts. The upper end of the lever arm 15 is rotatably connected to the support column 13. The front and rear ends of both sides of the upper surface of the base 1 are fixedly connected to the column 2. The upper part of the adjacent ends of the column 2 is rotatably connected to the fabric collecting roller 3. The upper part of the side wall of the column 2 near the rear end is fixedly connected to the servo motor 4. The output end of the servo motor 4 passes through the column 2 and is fixedly connected to the fabric collecting roller 3.

[0027] Please continue reading Figures 3-5The pressure block 16 is in direct contact with the fabric and can fit tightly against the fabric surface under the drive of the cylinder 6, effectively preventing wrinkles or unevenness in the fabric during sewing. The bolt connection is a detachable mechanical connection method, which facilitates quick disassembly and reinstallation of the cylinder 6 during the installation, debugging, maintenance and replacement of the equipment. This allows maintenance personnel to easily inspect, clean or replace the cylinder 6 without complicated tools or welding operations, thereby greatly improving the maintenance efficiency of the equipment. Through the rotational connection between the lever arm 15 and the bearing column 13, the pressure block 16 can be flexibly adjusted up and down in the vertical direction. This design allows the pressure block 16 to be precisely adjusted in distance from the base 1 according to the thickness of the fabric and sewing requirements, ensuring that the pressure block 16 can fit tightly against the fabric, thereby achieving the best flattening effect. The column 2, as a support component, is fixedly connected to the front and rear sides of the base 1, providing a stable support frame for the entire feeding mechanism. This design ensures the stability of the fabric collection roller 3 and other related components during operation, preventing structural deformation or displacement due to vibration or external forces. This guarantees the smoothness and consistency of fabric feeding. The fabric collection roller 3 is rotatably connected to the upper part of the column 2, enabling efficient fabric feeding. One side of the fabric collection roller 3 is used to wind unsewn fabric, while the other side is used to wind sewn fabric. This design allows the fabric to be smoothly fed from one fabric collection roller 3 to another during sewing, ensuring the continuity and stability of the sewing process. By fixing the servo motor 4 to the rear end of the column 2, the rotation of the fabric collection roller 3 can be controlled, achieving smooth and uniform fabric feeding. This precise control is particularly important for complex pattern sewing, ensuring that the tension and speed of the fabric remain consistent throughout the sewing process, avoiding sewing quality problems caused by uneven fabric feeding. It not only achieves efficient and precise power transmission, simplifies the mechanical structure, enhances the system's response speed, but also reduces mechanical wear, significantly improving the overall performance of the equipment. Preferably, the pressure block 16 increases the contact area between the bearing column 13 and the base 1, transforming the concentrated load into a surface contact load, effectively preventing deformation or fatigue cracking caused by local stress concentration in the base 1. Especially when the structure is subjected to dynamic loads such as vibration and impact, the pressure block 16 can suppress the plastic deformation of the base 1 material.

[0028] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0029] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the utility model task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A feeding mechanism for a pattern sewing machine, comprising a base (1), characterized in that: Protective shells (5) are fixedly connected to both the front and rear sides of the outer wall of the base (1). Cylinders (6) are provided on the inner wall of the protective shell (5) away from the base (1). Connecting blocks (7) are fixedly connected to the output end of the cylinders (6). Guide columns (8) are fixedly connected to the end of the connecting blocks (7) away from the base (1). Support columns (9) are fixedly connected to the end of the guide columns (8) away from the base (1). Movable frames (10) are fixedly connected to the upper end of the support columns (9). Slide grooves (11) are provided on both sides of the outer wall of the movable frames (10). Sliding blocks (12) are slidably connected to the inner wall of the slide grooves (11). Bearing columns (13) are fixedly connected to the adjacent ends of the sliding blocks (12). Mounting blocks (14) are fixedly connected to the middle of the upper surface of the protective shell (5). Power arms (15) are rotatably connected to the front and rear ends of both sides of the mounting blocks (14).

2. The feeding mechanism of a pattern sewing machine according to claim 1, characterized in that: Each of the bearing columns (13) has a pressure block (16) fixedly connected to its lower surface near the base (1).

3. The feeding mechanism of a pattern sewing machine according to claim 1, characterized in that: The inner wall of the protective shell (5) and the cylinder (6) are both fixed by bolts.

4. The feeding mechanism of a pattern sewing machine according to claim 1, characterized in that: The upper ends of the lever arms (15) are rotatably connected to the bearing columns (13).

5. The feeding mechanism of a pattern sewing machine according to claim 1, characterized in that: The base (1) has columns (2) fixedly connected to the front and rear ends on both sides of its upper surface.

6. The feeding mechanism of a pattern sewing machine according to claim 5, characterized in that: The upper part of each adjacent end of the column (2) is rotatably connected to a cloth collecting roller (3).

7. The feeding mechanism of a pattern sewing machine according to claim 5, characterized in that: A servo motor (4) is fixedly connected to the upper part of the side wall of the column (2) on the rear side.

8. The feeding mechanism of a pattern sewing machine according to claim 7, characterized in that: The output end of the servo motor (4) passes through the column (2) and is fixedly connected to the fabric collection roller (3).

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