Cloth clamping mechanism of sewing machine

Abstract

The cloth clamping mechanism of the sewing machine comprises a sewing plate, a sewing groove is formed in the surface of one side of the sewing plate, four square blocks are fixedly connected to the surface of one side of the sewing plate, the square blocks are distributed in a linear array mode, a movable groove is formed in the surface of one side of each square block, and the movable grooves are fixedly connected to the surface of the other side of the sewing plate. And a movable rod is movably connected into the movable groove. The electric push rod retracts to pull the connecting plate, the movable rod and the bottom plate are driven to move downwards, the upper clamping plate moves downwards and is tightly attached to the lower clamping plate, the two ends of the whole cloth are effectively clamped and fixed to the sewing plate, the output end of the air cylinder is pushed upwards, the top end of the U-shaped plate protrudes, the middle of the cloth is pushed, and the cloth is sewn. According to the sewing machine, the situation that cloth on the periphery of the sewing thread is wrinkled is reduced, meanwhile, the cloth on the periphery of the sewing thread is released and unfolded, the position of the sewing thread is more clearly and effectively highlighted, the sewing precision and stability are improved, and the practicability of the sewing machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cloth clamping production of sewing machines, in particular to a cloth clamping mechanism of a sewing machine. Background Art

[0002] A sewing machine is a machine that can quickly sew cloth, leather or other textiles together. Sewing machines are widely used in industrial and domestic sewing. Sewing machines can pass sewing thread through the fabric and sew using the movement of the needle and needle plate. The needle reciprocates in and out of the fabric, passing the sewing thread through the fabric and interweaving with other threads on one side to form a strong seam. Sewing machines can sew straight lines, stitch stitches, splicing, covering, bandaging, trimming and various other textile processing processes.

[0003] During the process of sewing fabrics by a sewing machine, different fabrics have different characteristics due to the characteristics of the fabrics themselves, such as elasticity, thickness, weight, etc. Some fabrics have higher elasticity and are easily deformed and twisted, resulting in position changes during the sewing process. In addition, some thin and light fabrics may be disturbed by airflow or mechanical vibration and become unstable. Therefore, it is necessary to clamp and fix the fabric when the sewing machine is sewing the fabric. Clamping the fabric can ensure that it remains stable during the sewing process, which is crucial for precise sewing and avoiding fabric movement. However, in the prior art, when a sewing machine sews fabric, the sewing machine itself is usually equipped with an adjustable presser foot to apply downward pressure to the fabric during the sewing process. The clamping and fixing of the fabric is relatively regionalized, and the overall fabric to be sewn cannot be clamped and fixed. Utility Model Content

[0004] The purpose of the utility model is to provide a cloth clamping mechanism for a sewing machine to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A cloth clamping mechanism of a sewing machine comprises a sewing plate, a sewing groove is provided on one side surface of the sewing plate, a square block is fixedly connected to one side surface of the sewing plate, four square blocks are arranged in a linear array, a movable groove is provided on one side surface of the square block, a movable rod is movably connected inside the movable groove, a bottom plate is fixedly connected to one side surface of the movable rod, two bottom plates are symmetrically arranged, a spring is fixedly connected to one side surface of the bottom plate, one end of the spring is fixedly connected to an upper clamping plate, one side surface of the upper clamping plate is wavy, a bottom ring is fixedly connected to one side surface of the bottom plate, a bottom ring is fixedly connected to one side surface of the upper clamping plate, and the bottom ring tube is sleeved on the outside of the spring.

[0007] Furthermore, a lower clamping plate is fixedly connected to one side surface of the sewing plate, and one side surface of the lower clamping plate is wavy. One side surface of the lower clamping plate is adapted to one side surface of the upper clamping plate. The lower clamping plate is arranged directly below the upper clamping plate, and two lower clamping plates are symmetrically distributed. Two upper clamping plates are symmetrically distributed. One side surface of the sewing plate is movably connected to a U-shaped plate, and one side surface of the U-shaped plate is movably buckled with a rotating rod, and two rotating rods are symmetrically distributed.

[0008] Furthermore, a processing box is movably connected to one side surface of the sewing plate, a motor is fixedly connected to one side surface of the processing box, a threaded rod is fixedly connected to the output end of the motor, a rotating bearing is fixedly connected to one side surface of the processing box, and an outer shaft of the rotating bearing is fixedly connected to one side surface of the processing box.

[0009] Furthermore, one side surface of the threaded rod is fixedly connected to one side surface of the rotating bearing, the inner shaft of the rotating bearing is fixedly connected to one side surface of the threaded rod, and a moving block is movably connected to the outer side of the threaded rod.

[0010] Furthermore, a cylinder is fixedly connected to one side surface of the moving block, a connecting rod is fixedly connected to one side surface of the cylinder, the cylinder is connected to one side surface of the sewing plate through the connecting rod, and an output end of the cylinder is fixedly connected to one side surface of the U-shaped plate.

[0011] Furthermore, an electric push rod is fixedly connected to one side surface of the moving block, a connecting plate is fixedly connected to the output end of the electric push rod, one side surface of the connecting plate is fixedly connected to one side surface of the movable rod, the lower end of the movable rod is fixedly connected to a connecting plate, and two connecting plates are symmetrically distributed.

[0012] Furthermore, a limiting plate is fixedly connected to one side surface of the processing box, two limiting plates are provided, and the two limiting plates are respectively arranged on both sides of the moving block, a placing table is fixedly connected to one side surface of the processing box, a sewing device is fixedly connected to one side surface of the placing table, and an output end of the sewing device is located directly above the sewing groove.

[0013] Compared with the prior art, the utility model provides a cloth clamping mechanism for a sewing machine, which has the following beneficial effects:

[0014] The utility model contracts and pulls the connecting plate through the electric push rod, thereby driving the movable rod and the bottom plate to move downward, so that the upper clamping plate moves downward and fits tightly with the lower clamping plate, so that the two ends of the entire cloth are effectively clamped and fixed on the sewing plate, and the output end of the cylinder pushes upward, so that the top end of the U-shaped plate protrudes, and the middle part of the cloth is pushed, thereby reducing the wrinkles of the cloth around the sewing line and at the same time having a soothing effect on the cloth around the sewing line, highlighting the position of the sewing line more clearly and effectively, and improving the accuracy and stability of sewing. The rotating rod connected to the top end of the U-shaped plate rotates as it contacts with the cloth during the pushing process, thereby reducing the friction between the cloth and the pushing, and avoiding scratches on the cloth and displacement of the sewing line position.

[0015] The utility model contracts and pulls the connecting plate through the electric push rod, thereby driving the upper clamping plate to move downward and fit closely with the lower clamping plate. The upper clamping plate and the lower clamping plate fit closely with each other and are both wavy, providing better clamping force and clamping the cloth more tightly. Since the spring has elastic potential energy, it will exert a force on the upper clamping plate during the squeezing process, which helps to prevent the cloth from moving or sliding during the sewing process, thereby achieving more accurate sewing and improving practicality.

[0016] The utility model drives the movement of the moving block and the upper end as a whole through a motor, and the output end of the sewing device is located directly above the sewing groove, thereby ensuring stable and accurate transportation of the cloth during the sewing process, and reducing deviations and errors caused by manual control of sewing, thereby improving the speed and efficiency of sewing, reducing labor costs and working time, and providing a constant sewing rate to ensure efficient operation of the production line, and facilitating the sewing work of the sewing device on the cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from an upward viewing angle;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a left-side viewing angle;

[0019] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the utility model from the front view angle;

[0020] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the utility model from a right-side viewing angle;

[0021] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the utility model from a left-side viewing angle;

[0022] Figure 6 It is a schematic diagram of an enlarged three-dimensional structure of part of the structure of the utility model;

[0023] Figure 7It is a three-dimensional structural schematic diagram of the internal structure of the utility model.

[0024] In the figure: 1. sewing plate; 2. sewing groove; 3. movable rod; 4. bottom plate; 5. spring; 6. bottom ring; 7. lower clamping plate; 8. U-shaped plate; 9. rotating rod; 10. connecting rod; 11. cylinder; 12. moving block; 13. motor; 14. threaded rod; 15. rotating bearing; 16. electric push rod; 17. limit plate; 18. square block; 19. movable groove; 20. processing box; 21. upper clamping plate; 22. placing table; 23. sewing device; 24. connecting plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-7 The utility model provides a technical solution: a cloth clamping mechanism of a sewing machine, comprising a sewing plate 1, a sewing groove 2 is provided on one side surface of the sewing plate 1, a square block 18 is fixedly connected to one side surface of the sewing plate 1, four square blocks 18 are arranged in a linear array, a movable groove 19 is provided on one side surface of the square block 18, a movable rod 3 is movably connected inside the movable groove 19, and the movable groove 19 is used for the movable rod 3 to move up and down, a bottom plate 4 is fixedly connected to one side surface of the movable rod 3, two symmetrically distributed bottom plates 4 are arranged, a spring 5 is fixedly connected to one side surface of the bottom plate 4, one end of the spring 5 is fixedly connected to an upper clamping plate 21, the spring 5 has elastic potential energy, and has an acting force on the upper clamping plate 21, and one side surface of the upper clamping plate 21 is wavy, a bottom ring 6 is fixedly connected to one side surface of the bottom plate 4, a bottom ring 6 is fixedly connected to one side surface of the upper clamping plate 21, the bottom ring 6 is sleeved on the outside of the spring 5, and the bottom ring 6 protects both ends of the spring 5.

[0027] The upper and lower clamping plates 21 are provided with two symmetrically distributed upper and lower clamping plates 21, and the upper and lower clamping plates 21 are provided with two symmetrically distributed upper and lower clamping plates 21. The upper and lower clamping plates 21 can contact with the lower clamping plates 7 to clamp the cloth together. One side surface of the sewing plate 1 is fixedly connected with a lower clamping plate 7, and one side surface of the lower clamping plate 7 is wavy. One side surface of the lower clamping plate 7 is adapted to each other. The lower clamping plate 7 is arranged directly below the upper clamping plate 21, and the lower clamping plate 7 is provided with two symmetrically distributed ones, and the upper clamping plate 21 is provided with two symmetrically distributed ones. The upper clamping plate 21 can contact with the lower clamping plate 7 to clamp the cloth together. One side surface of the sewing plate 1 is movably connected with a U-shaped plate 8, and the two ends of the U-shaped plate 8 can move up and down at the upper end of the sewing plate 1. When in use, the tops of the two ends of the U-shaped plate 8 are higher than the upper plane of the sewing plate 1. When it is not practical, the tops of the two ends of the U-shaped plate 8 are lower than the upper plane of the sewing plate 1. One side surface of the U-shaped plate 8 is movably buckled with a rotating rod 9, and the rotating rod 9 is provided with two symmetrically distributed ones. The rotating rod 9 can rotate at the tops of the two ends of the U-shaped plate 8 to reduce the friction between the U-shaped plate 8 and the cloth to prevent the cloth from being damaged when the U-shaped plate 8 acts upward.

[0028] A processing box 20 is movably connected to one side surface of the sewing plate 1, a motor 13 is fixedly connected to one side surface of the processing box 20, a threaded rod 14 is fixedly connected to the output end of the motor 13, a rotating bearing 15 is fixedly connected to one side surface of the processing box 20, an outer shaft of the rotating bearing 15 is fixedly connected to one side surface of the processing box 20, and the motor 13 works to drive the threaded rod 14 to rotate.

[0029] One side surface of the threaded rod 14 is fixedly connected to one side surface of the rotating bearing 15, the inner shaft of the rotating bearing 15 is fixedly connected to one side surface of the threaded rod 14, and the outer side of the threaded rod 14 is movably connected to the moving block 12. When the threaded rod 14 rotates, the moving block 12 will move accordingly.

[0030] A cylinder 11 is fixedly connected to one side surface of the moving block 12, and a connecting rod 10 is fixedly connected to one side surface of the cylinder 11. The cylinder 11 is connected to one side surface of the sewing plate 1 through the connecting rod 10. The connecting rod 10 stabilizes the distance between the sewing plate 1 and the cylinder 11. The output end of the cylinder 11 is fixedly connected to one side surface of the U-shaped plate 8, and the cylinder 11 can drive the U-shaped plate 8 to move up and down.

[0031] One side surface of the moving block 12 is fixedly connected to an electric push rod 16, and the output end of the electric push rod 16 is fixedly connected to a connecting plate 24. One side surface of the connecting plate 24 is fixedly connected to one side surface of the movable rod 3. The lower end of the movable rod 3 is fixedly connected to a connecting plate 24. Two connecting plates 24 are symmetrically distributed. The electric push rod 16 drives the connecting plate 24 to move up and down, thereby driving the movable rod 3 and the base plate 4, spring 5 and upper clamping plate 21 connected to the movable rod 3 to move up and down.

[0032] A limiting plate 17 is fixedly connected to the surface of one side of the processing box 20. Two limiting plates 17 are provided. The two limiting plates 17 are respectively arranged on both sides of the moving block 12. The limiting plates 17 play a role of limiting the two ends of the moving block 12. A placing table 22 is fixedly connected to the surface of one side of the processing box 20. A sewing device 23 is fixedly connected to the surface of one side of the placing table 22. The output end of the sewing device 23 is located directly above the sewing groove 2, which facilitates the sewing work of the sewing device 23 on the cloth.

[0033] Working principle: Before using the utility model, the motor 13 is started to work, driving the threaded rod 14 to rotate, so that the moving block 12 moves to one side of the processing box 20, and the moving block 12 fits the limit plate 17 at one end. At this time, the tops of the two ends of the U-shaped plate 8 are lower than the upper plane of the sewing plate 1, and the spring 5 connected to the bottom plate 4 and the upper clamping plate 21 are above the lower clamping plate 7. The upper clamping plate 21 and the lower clamping plate 7 are not in contact and connected. This is the initial state. The cloth to be sewn is placed flat on the sewing plate 1, and the sewing thread to be sewn is facing the sewing groove 2, and the two ends are placed on the upper end of the lower clamping plate 7. The electric push rod 16 contracts and pulls the connecting plate 24, driving the movable rod 3 and the movable rod 3. The bottom plate 4, spring 5 and upper clamping plate 21 connected to the movable rod 3 move downward, driving the upper clamping plate 21 to move downward and fit closely with the lower clamping plate 7. The upper clamping plate 21 and the lower clamping plate 7 fit each other and are both wavy, providing better clamping force and clamping the cloth more tightly. Because the spring 5 has elastic potential energy, it will exert a force on the upper clamping plate 21 during the squeezing process, which helps to prevent the cloth from moving or sliding during the sewing process. When the two ends are fixed, the output end of the cylinder 11 is pushed upward, so that the top of the U-shaped plate 8 protrudes, and the tops of the two ends of the U-shaped plate 8 are higher than the upper plane of the sewing plate 1, pushing the middle of the cloth to reduce the sewing The wrinkles of the fabric around the sewing thread are detected, and at the same time, the fabric around the sewing thread is soothed and unfolded, which more clearly and effectively highlights the position of the sewing thread, thereby improving the accuracy and stability of sewing. The rotating rod 9 connected to the top of the U-shaped plate 8 rotates as it contacts the fabric during the pushing process, thereby reducing the friction between the fabric and the fabric during pushing, avoiding scratches on the fabric and displacement of the sewing thread position. The motor 13 drives the moving block 12 and the upper end of the moving block 12 to move as a whole, and cooperates with the sewing device 23 to ensure the stable and accurate transportation of the fabric during the sewing process, and can reduce the deviation and error caused by manual control of sewing. The moving block 12 moves to another limit When the plate 17 is on the side, the cloth at the upper end of the sewing groove 2 is sewn to the tail end of the sewing groove 2, which also means that the sewing of the sewing line on the cloth is completed, the cylinder 11 contracts and drives the U-shaped plate 8 to move downward, so that the top position of the U-shaped plate 8 returns to the lower end of the upper surface of the sewing plate 1, and the electric push rod 16 extends upward, driving the connecting plate 24 to move upward, so that the movable rod 3 moves upward inside the movable groove 19, driving the bottom plate 4 and the connected spring 5 and the upper clamping plate 21 to move upward, and the upper clamping plate 21 is separated from the upper side of the cloth, so as to facilitate the removal of the processed cloth, and use the motor 13 to move the movable block 12 and the upper end as a whole to the initial state, so as to facilitate the next stable clamping and sewing processing of the cloth.

Claims

1. A cloth clamping mechanism for a sewing machine, comprising a sewing plate (1) and a moving block (12), wherein a sewing groove (2) is provided on one side surface of the sewing plate (1), and a square block (18) is fixedly connected to one side surface of the sewing plate (1), characterized in that: The square block (18) is provided with four blocks distributed in a linear array. A movable groove (19) is provided on one side surface of the square block (18). A movable rod (3) is movably connected inside the movable groove (19). A bottom plate (4) is fixedly connected to one side surface of the movable rod (3). The bottom plate (4) is provided with two blocks distributed symmetrically. A spring (5) is fixedly connected to one side surface of the bottom plate (4). One end of the spring (5) is fixedly connected to an upper clamping plate (21). One side surface of the upper clamping plate (21) is wavy. A bottom ring (6) is fixedly connected to one side surface of the bottom plate (4). One side surface of the upper clamping plate (21) is fixedly connected to the bottom ring (6). The bottom ring (6) is sleeved on the outside of the spring (5).

2. The cloth clamping mechanism of a sewing machine according to claim 1, characterized in that: A lower clamping plate (7) is fixedly connected to one side surface of the sewing plate (1), and one side surface of the lower clamping plate (7) is wavy. One side surface of the lower clamping plate (7) is mutually adapted to one side surface of the upper clamping plate (21). The lower clamping plate (7) is arranged directly below the upper clamping plate (21), and two lower clamping plates (7) are provided in a symmetrical arrangement, and two upper clamping plates (21) are provided in a symmetrical arrangement. One side surface of the sewing plate (1) is movably connected to a U-shaped plate (8), and one side surface of the U-shaped plate (8) is movably buckled with a rotating rod (9), and two rotating rods (9) are provided in a symmetrical arrangement.

3. The cloth clamping mechanism of a sewing machine according to claim 2, characterized in that: A processing box (20) is movably connected to one side surface of the sewing plate (1), a motor (13) is fixedly connected to one side surface of the processing box (20), a threaded rod (14) is fixedly connected to an output end of the motor (13), a rotating bearing (15) is fixedly connected to one side surface of the processing box (20), and an outer shaft of the rotating bearing (15) is fixedly connected to one side surface of the processing box (20).

4. The cloth clamping mechanism of a sewing machine according to claim 3, characterized in that: One side surface of the threaded rod (14) is fixedly connected to one side surface of the rotating bearing (15), the inner shaft of the rotating bearing (15) is fixedly connected to one side surface of the threaded rod (14), and the outer side of the threaded rod (14) is movably connected to a moving block (12).

5. The cloth clamping mechanism for a sewing machine according to claim 4, characterized in that: A cylinder (11) is fixedly connected to one side surface of the moving block (12), a connecting rod (10) is fixedly connected to one side surface of the cylinder (11), the cylinder (11) is connected to one side surface of the sewing plate (1) via the connecting rod (10), and an output end of the cylinder (11) is fixedly connected to one side surface of the U-shaped plate (8).

6. The cloth clamping mechanism for a sewing machine according to claim 4, characterized in that: A side surface of the moving block (12) is fixedly connected to an electric push rod (16), an output end of the electric push rod (16) is fixedly connected to a connecting plate (24), a side surface of the connecting plate (24) is fixedly connected to a side surface of the movable rod (3), the lower end of each movable rod (3) is fixedly connected to a connecting plate (24), and two connecting plates (24) are provided in a symmetrical arrangement.

7. The cloth clamping mechanism of a sewing machine according to claim 3, characterized in that: A limiting plate (17) is fixedly connected to the surface of one side of the processing box (20), two limiting plates (17) are provided, and the two limiting plates (17) are respectively arranged on both sides of the moving block (12); a placing table (22) is fixedly connected to the surface of one side of the processing box (20), and a sewing device (23) is fixedly connected to the surface of one side of the placing table (22), and an output end of the sewing device (23) is located directly above the sewing groove (2).

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