Needle plate replacement device for sewing machine

Abstract

The utility model belongs to needle plate replacement technical field especially is a needle plate replacement device for sewing machine, including work bench and support station, one side fixed connection of support station surface has limit stop, one side mounting of limit stop surface has second motor, the output of second motor is connected with screw thread rotary axle, the surface screw thread connection of screw thread rotary axle has movable block, one side fixed connection of movable block surface has connecting block. Through the cooperation between pneumatic clamp jaw, permanent magnet, dust absorption pipe and high pressure air gun, the high pressure air gun blows up the scrap and thread end of needle plate position, the dust absorption pipe inhales the scrap and thread end into the inside of dust absorption box, replaces manual cleaning, makes the cleaning effect more ideal, pneumatic clamp jaw clamps new needle plate, drives movable block and pneumatic clamp jaw to drop through screw thread rotary axle, thereby will install pneumatic clamp jaw to corresponding position, reduces the repeated operation of staff, reduces the waste to work time, improves work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of needle plate replacement technology, specifically relating to a needle plate replacement device for sewing machines. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to create one or more stitches on fabric, interweaving or sewing together one or more layers of fabric. Sewing machines can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, as well as products made of leather, plastic, and paper. The stitches produced are neat, beautiful, flat, and strong. Sewing is fast and easy to use. It has also given rise to art forms such as hand-pressed embroidery and computer embroidery. The needle plate is the core component of jute and flax carding machines, mainly composed of a curved wooden board with steel needles embedded in it. Its design uses an arc-shaped structure that matches the curvature of the carding machine's roller surface. The steel needles are made of high-carbon steel, quenched and polished, and fixed to the base plate through a static fit. To prevent wear when processing coarse and hard fibers, the surface of the wooden base plate can be covered with a thin metal plate. The wood must be treated to prevent mold and insect infestation and coated with clear varnish; tree species such as gardenia and beech, which combine lightness and elasticity, are preferred.

[0003] After a long period of operation, the sewing machine needs to replace the needle plate. Replacing the needle plate is usually done manually, which is inefficient. After the old needle plate is removed, a lot of debris and thread ends remain at the mounting point. It is difficult to clean this manually, and too much repetition wastes a lot of working time. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a needle plate replacement device for sewing machines. It solves the problems of low work efficiency when manually replacing needle plates, the large amount of debris and thread left at the needle plate mounting location after the old needle plate is removed, the inability to clean it properly manually, and the waste of a lot of working time due to excessive repetition.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a needle plate changing device for a sewing machine, comprising a worktable and a support platform. A limit block is fixedly connected to one side of the surface of the support platform. A second motor is installed on one side of the surface of the limit block. A threaded rotating shaft is connected to the output end of the second motor. A movable block is threadedly connected to the surface of the threaded rotating shaft. A connecting block is fixedly connected to one side of the surface of the movable block. A pneumatic gripper is installed at one end of the connecting block. An electric slide rail is installed on the other side of the surface of the support platform. A slider is provided on one side of the surface of the electric slide rail. A permanent magnet is connected to one side of the bottom of the slider.

[0006] Preferably, a dust collection box is installed in the middle of the surface of the support platform, a vacuum cleaner is installed on one side of the surface of the dust collection box, a vacuum cleaner pipe is fixedly connected to one side inside the dust collection box, and the other end of the vacuum cleaner pipe passes through the interior of the slider and contacts the permanent magnet.

[0007] Preferably, a servo motor is installed on one side of the top of the support platform, the output end of the servo motor is connected to a second rotating shaft, and one end of the second rotating shaft is connected to a high-pressure air gun.

[0008] Preferably, the limiting block has a limiting groove inside, and the surface of the limiting groove is movably connected to the surface of the movable block.

[0009] Preferably, each of the four corners of the bottom of the workbench is fixedly connected to a support leg, and a caster wheel is installed on one side of the bottom of each support leg.

[0010] Preferably, a first motor is installed at the center of the workbench surface, the output end of the first motor is connected to a first rotating shaft, and the other end of the first rotating shaft is connected to the bottom of the support platform.

[0011] Preferably, there are two sets of servo motors, second rotating shafts, and high-pressure air guns, and the two sets of servo motors, second rotating shafts, and high-pressure air guns are installed in a corresponding manner.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The pneumatic grippers, permanent magnets, vacuum hoses, and high-pressure air gun work together to quickly remove the old needle plate. The permanent magnets hold the old needle plate, and an electric slide rail lifts the slider and permanent magnets to remove the replacement needle plate. During removal, a vacuum cleaner drives the vacuum hose, and the high-pressure air gun blows up debris and thread ends from the needle plate location. The vacuum hose then sucks these debris and thread ends into the vacuum chamber, replacing manual cleaning and resulting in a more effective cleaning. After cleaning, the pneumatic grippers hold the new needle plate. A threaded rotating shaft lowers the movable block and pneumatic grippers, installing them in the correct position. Workers only need to manually tighten the bolts to replace the sewing machine's needle plate, reducing repetitive operations, saving time, and improving efficiency. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2This is a schematic diagram of the servo motor of this utility model;

[0017] Figure 3 This is a schematic diagram of the dust collection box of this utility model;

[0018] Figure 4 This is a schematic diagram of the limiting block of this utility model;

[0019] Figure 5 This is a schematic diagram of the electric slide rail of this utility model;

[0020] Figure 6 This is a schematic diagram of the high-pressure air gun of this utility model.

[0021] In the diagram: 1. Workbench; 2. Support leg; 3. Caster wheel; 4. First motor; 5. Support platform; 6. Limit block; 7. Electric slide rail; 8. First rotating shaft; 9. Servo motor; 10. Vacuum cleaner; 11. Vacuum box; 12. Vacuum hose; 13. Connecting block; 14. Pneumatic gripper; 15. Second motor; 16. Threaded rotating shaft; 17. Movable block; 18. Limit groove; 19. Slider; 20. Permanent magnet; 21. Second rotating shaft; 22. High-pressure air gun. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 The present invention provides the following technical solution: a needle plate changing device for a sewing machine, comprising a workbench 1 and a support platform 5. A limit block 6 is fixedly connected to one side of the surface of the support platform 5. A second motor 15 is installed on one side of the surface of the limit block 6. The output end of the second motor 15 is connected to a threaded rotating shaft 16. A movable block 17 is threadedly connected to the surface of the threaded rotating shaft 16. A connecting block 13 is fixedly connected to one side of the surface of the movable block 17. A pneumatic gripper 14 is installed at one end of the connecting block 13. An electric slide rail 7 is installed on the other side of the surface of the support platform 5. A slider 19 is provided on one side of the surface of the electric slide rail 7. A permanent magnet 20 is connected to one side of the bottom of the slider 19.

[0024] In this embodiment: when the permanent magnet 20 drives the old needle plate to rise, the vacuum cleaner 10 drives the vacuum tube 12 to suck the thread ends and debris into the vacuum box 11, which avoids the thread debris falling and contaminating the rotary hook area during the disassembly and assembly process, reduces the subsequent cleaning needs, and alleviates the pressure of manual cleaning.

[0025] In this embodiment: by precisely adjusting the control angle of the two sets of high-pressure air guns 22 through two sets of servo motors 9, the thread ends and debris can be blown up when disassembling the old needle plate, and the dust suction pipe 10 can suck up the thread ends and debris to avoid the accumulation of debris residue and ensure that there are no impurities interfering with the needle plate mounting surface.

[0026] In this embodiment: the corresponding support leg 2 can improve the stability of the device, and the casters 3 installed at the bottom of the support leg 2 facilitate the rapid transfer of the device in the workshop.

[0027] In this embodiment, the first motor 4 drives the first rotating shaft 8 and the support platform 5 to rotate, thereby exchanging the positions of the pneumatic gripper 14 and the permanent magnet 20, so that the disassembly and installation of the needle plate can be carried out simultaneously, improving the working efficiency of the device.

[0028] The working principle and usage process of this utility model are as follows: After the utility model is installed, move the device to the corresponding position, lock the universal wheel 3, and manually tighten the bolts fixing the needle plate on the sewing machine. Start the electric slide rail 7, which will drive the slider 19 and permanent magnet 20 to move downwards. When the permanent magnet 20 is in full contact with the needle plate, close the electric slide rail 7, start the two sets of servo motors 9, which will drive the two sets of second rotating shafts 21 to rotate, thereby driving the high-pressure air guns 22 to move around the rotating shafts 21, and then drive the high-pressure air guns 22 to move around the needle plate table. When the positions of the two sets of high-pressure air guns 22 and the needle plate table are aligned, start the high-pressure air guns 22 to blow strong air towards the needle plate table, start the vacuum cleaner 10, which will drive the vacuum pipe 12 to work, and start the electric slide rail 7, which will drive the slider 19 and permanent magnet 20 to move downwards. The machine rises, removing the old needle plate. Debris and thread ends from the needle plate table are blown up by a strong wind and sucked into the dust collection box 11 by the suction pipe 12. The pneumatic gripper 14 is activated to hold the new needle plate. The first motor 4 is started, driving the first rotating shaft 8 and the support platform 5 to rotate. When the new needle plate is directly above the needle plate table, the first motor 4 is turned off, and the second motor 15 is started, driving the threaded rotating shaft 16 to rotate. This causes the movable block 17 to move within the limiting groove 18, which in turn causes the connecting block 13 and the pneumatic gripper 14 to descend, placing the new needle plate on the needle plate table. The pneumatic gripper 14 is then opened, and the operator tightens the bolts to complete the replacement of the sewing machine needle plate. All electrical equipment in this device is powered by an external power source, and all motors or electric push rods in this paper are controlled by a PLC control system.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A needle plate changing device for a sewing machine, comprising a worktable (1) and a support table (5), characterized in that: A limiting block (6) is fixedly connected to one side of the surface of the support platform (5). A second motor (15) is installed on one side of the surface of the limiting block (6). A threaded rotating shaft (16) is connected to the output end of the second motor (15). A movable block (17) is threadedly connected to the surface of the threaded rotating shaft (16). A connecting block (13) is fixedly connected to one side of the surface of the movable block (17). A pneumatic gripper (14) is installed at one end of the connecting block (13). An electric slide rail (7) is installed on the other side of the surface of the support platform (5). A slider (19) is provided on one side of the surface of the electric slide rail (7). A permanent magnet (20) is connected to one side of the bottom of the slider (19).

2. The needle plate changing device for a sewing machine according to claim 1, characterized in that: A dust collection box (11) is installed in the middle of the surface of the support platform (5). A vacuum cleaner (10) is installed on one side of the surface of the dust collection box (11). A vacuum cleaner pipe (12) is fixedly connected to one side of the inside of the dust collection box (11), and the other end of the vacuum cleaner pipe (12) passes through the inside of the slider (19) and contacts the permanent magnet (20).

3. The needle plate changing device for a sewing machine according to claim 1, characterized in that: A servo motor (9) is installed on one side of the top of the support platform (5). The output end of the servo motor (9) is connected to a second rotating shaft (21), and one end of the second rotating shaft (21) is connected to a high-pressure air gun (22).

4. The needle plate changing device for a sewing machine according to claim 1, characterized in that: The limiting block (6) has a limiting groove (18) inside, and the surface of the limiting groove (18) is movably connected to the surface of the movable block (17).

5. A needle plate changing device for a sewing machine according to claim 1, characterized in that: The workbench (1) has four fixed support legs (2) at the bottom corners, and a caster wheel (3) is installed on one side of the bottom of the support leg (2).

6. A needle plate changing device for a sewing machine according to claim 1, characterized in that: A first motor (4) is installed at the center of the surface of the workbench (1). The output end of the first motor (4) is connected to a first rotating shaft (8), and the other end of the first rotating shaft (8) is connected to the bottom of the support platform (5).

7. A needle plate changing device for a sewing machine according to claim 3, characterized in that: The number of servo motors (9), second rotating shafts (21) and high-pressure air guns (22) are all two sets, and the two sets of servo motors (9), second rotating shafts (21) and high-pressure air guns (22) are installed in a corresponding manner.

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