Thread end shortening thread clamping and pulling mechanism for sewing device

Abstract

The utility model relates to the technical field of sewing machines, in particular to a thread end shortening thread clamping and pulling mechanism for a sewing device, which comprises a thread pulling component and a thread clamping component arranged above the thread pulling component. The thread pulling assembly comprises a first mounting plate, a thread pulling driving part arranged on the first mounting plate and a thread pulling rod body assembly connected with the output end of the thread pulling driving part, the thread clamping assembly clamps and fixes a silk thread, and the thread pulling driving part drives the thread pulling rod body assembly to pull the clamped silk thread to move in the direction away from the thread clamping assembly; the thread end length of a sewing thread of an external sewing object is shortened, and the production efficiency and the production quality are improved through the thread pulling assembly and the thread clamping assembly.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular discloses a thread clamping and pulling mechanism for shortening thread ends in a sewing device. Background Technology

[0002] In sewing equipment, precise control of thread length directly affects sewing quality and efficiency. Traditional thread handling mechanisms often employ mechanical clamping combined with manual thread pulling, which suffers from problems such as unstable clamping force, poor consistency in thread length, and susceptibility to thread damage due to friction or vibration. For example, mechanical grippers are prone to wear leading to decreased clamping force; the thread experiences significant frictional loss between the thread and the guide structure during thread pulling; and the lack of a tension feedback mechanism makes it difficult to adapt to the strength differences of different threads (such as synthetic fibers and metal threads). Furthermore, in existing technologies, the drive components of thread pulling assemblies are mostly rigidly connected, which are prone to impact vibrations during high-speed movement, resulting in decreased positioning accuracy or component fatigue damage. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a thread clamping and pulling mechanism for shortening thread ends in a sewing device.

[0004] To achieve the above objectives, this utility model provides a thread clamping and pulling mechanism for shortening thread ends in a sewing device, comprising a thread pulling assembly and a thread clamping assembly disposed above the thread pulling assembly. The thread pulling assembly includes a first mounting plate, a thread pulling drive component disposed on the first mounting plate, and a thread pulling rod assembly connected to the output end of the thread pulling drive component. The thread clamping assembly clamps and fixes the thread, and the thread pulling drive component drives the thread pulling rod assembly to pull the clamped thread away from the thread clamping assembly, thereby tightening the thread and shortening the thread end length of the sewing thread in the external sewing object.

[0005] The wire clamping assembly includes a wire clamping electromagnet, a first adsorption member fixedly mounted on the wire clamping electromagnet, a second adsorption member movably mounted on the first adsorption member, and an elastic member for driving the second adsorption member to reset; when the wire clamping electromagnet is energized, it drives the first adsorption member to approach the second adsorption member to clamp the wire; when the wire clamping electromagnet is de-energized, the elastic member drives the second adsorption member to reset.

[0006] The thread clamping assembly uses an electromagnet to drive the first suction element to approach the second suction element and clamp the thread. Automated thread clamping is achieved upon power-up. Compared to traditional manual or complex mechanical thread clamping methods, this improves clamping efficiency, reduces human error, and allows the sewing device to quickly and accurately fix the thread upon startup, ensuring smooth subsequent sewing operations. The electromagnet-driven clamping method provides strong clamping force, ensuring the thread is firmly and stably clamped, preventing it from easily loosening or falling off. This provides a reliable guarantee for subsequent thread pulling and shortening, contributing to improved sewing quality and thread end treatment.

[0007] The first mounting plate is provided with a first guide groove. The pull rod assembly includes a pull arm and a movable plate. One end of the pull arm is connected to the output end of the pull drive, and the other end away from the output end of the pull drive is hinged to the movable plate via a hinge shaft. The movable plate is slidably disposed in the first guide groove on the side away from the pull arm. The pull drive drives the pull arm to swing, thereby causing the movable plate to move linearly back and forth in the first guide groove. The reciprocating movement of the movable plate causes the wire to be tightened.

[0008] The thread-pulling drive unit drives the thread-pulling arm to swing, which in turn drives the moving plate to move linearly back and forth within the first guide groove. This mechanical structure achieves the tensioning of the thread. This design makes the thread-pulling process more efficient and stable, enabling the thread to be tightened quickly, effectively shortening the thread end length, and improving the overall working efficiency of the sewing device.

[0009] The first guide groove on the first mounting plate provides accurate guidance for the moving plate, enabling it to move back and forth in a straight line along the preset path, thus ensuring the stability and accuracy of the wire pulling process.

[0010] The first mounting plate is also provided with positioning holes, and the movable plate is provided with first guide strip holes. Screws are installed into the positioning holes on the first mounting plate through the first guide strip holes to limit the maximum displacement range of the movable plate.

[0011] The first mounting plate has positioning holes, and the movable plate has first guide strip holes. The movable plate is fixed to the first mounting plate by screws, and the maximum displacement range of the movable plate can be precisely set. This design avoids excessive movement of the movable plate, which could lead to excessive stretching or damage to the wire, ensuring the controllability of the wire drawing process and improving the reliability and stability of the equipment.

[0012] The pull wire assembly has a first thread hole. The end of the movable plate away from the pull wire swing arm is a free end. The free end of the movable plate has a second thread hole. The wire passes through the first thread hole and the second thread hole in sequence and is pulled and tightened as the movable plate moves back and forth.

[0013] The first threading hole on the threading assembly and the second threading hole at the free end of the moving plate provide a smooth channel for the thread, allowing it to pass through smoothly and be pulled taut with the reciprocating motion of the moving plate. This design reduces friction and resistance during threading, improves threading efficiency, and reduces the risk of thread breakage.

[0014] An elastic buffer is provided on the outer side of the hinge shaft connecting the wire-pulling arm and the moving plate. This elastic buffer can buffer the impact force during the wire-pulling process, reduce mechanical wear, and extend the service life of the equipment.

[0015] The inner walls of the first and second threading holes are embedded with ceramic rings. The ceramic rings have a smooth surface and good wear resistance, which can reduce the friction between the wire and the inner wall of the threading hole, protect the wire from damage, extend the service life of the wire, and also help maintain the tension and elasticity of the wire.

[0016] The wire clamping and pulling mechanism also includes a tension sensor, which is installed on the wire path between the wire clamping assembly and the wire pulling assembly. The tension sensor is used to detect the wire tension in real time and transmit the tension data back to the external control center. The external control center is electrically connected to the wire clamping assembly and the wire pulling assembly. The external control center adjusts the wire clamping electromagnet of the wire clamping assembly and the wire pulling drive of the wire pulling assembly according to the tension data.

[0017] Intelligent control of the equipment is achieved through electrical connection between an external control center and the thread clamping and pulling components. The working states of the thread clamping electromagnet and the pulling drive are automatically adjusted based on tension data, enabling the equipment to adapt to different sewing needs and thread characteristics, thus improving its adaptability and flexibility.

[0018] The bottom of the first guide groove is provided with a self-lubricating coating. This coating reduces friction as the moving plate moves within the guide groove, resulting in smoother movement, lower energy consumption, reduced wear on the guide groove, and extended equipment lifespan.

[0019] A shock-absorbing washer is provided between the screw and the first guide strip hole. The shock-absorbing washer is sleeved on the screw shank and clamped between the screw head and the surface of the first guide strip hole of the moving plate. The shock-absorbing washer between the screw and the first guide strip hole can effectively absorb and buffer the vibration generated during the wire pulling process, reduce the impact of vibration on the equipment, improve the stability and reliability of the equipment, and also help reduce noise pollution and improve the working environment.

[0020] The beneficial effects of this utility model are as follows: The thread clamping assembly of this utility model uses a wire clamping electromagnet to drive the first adsorption component to approach the second adsorption component and clamp the thread, thus completing the automated thread clamping; in the thread pulling assembly, the thread pulling drive component drives the thread pulling arm to swing, which drives the moving plate hinged to the arm to move linearly back and forth in the first guide groove, thereby pulling the thread to tighten; the tension sensor monitors the thread tension in real time and feeds it back to the external control center, realizing intelligent regulation, improving the thread clamping efficiency and stability, and ensuring subsequent sewing work; the thread pulling assembly adopts a mechanical linkage structure, which efficiently and stably pulls the thread to shorten the thread end; the design of the first guide groove and positioning hole ensures the accuracy and controllability of the thread pulling process; the ceramic ring on the inner wall of the thread hole reduces thread wear and extends service life; the tension sensor realizes intelligent control, improving the adaptability and flexibility of the equipment; the self-lubricating coating and shock-absorbing washer reduce energy consumption and noise, and improve the stability and reliability of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the pull wire assembly of this utility model;

[0023] Figure 3 This is a structural schematic diagram of the pull wire assembly of this utility model from another perspective;

[0024] Figure 4 This is a schematic diagram of the wire clamping assembly of this utility model;

[0025] Figure 5 This is a schematic diagram of the screw of this utility model.

[0026] The reference numerals in the figures include:

[0027] 1. Cable pull assembly; 2. Cable clamping assembly; 3. First mounting plate; 4. Cable pull drive component; 5. Cable pull rod body assembly; 6. Cable clamping electromagnet; 7. First suction component; 8. Second suction component; 9. First guide groove; 11. Cable pull swing arm; 12. Moving plate; 14. First guide strip hole; 15. Screw; 16. First wire through hole; 17. Second wire through hole; 18. Elastic buffer component; 19. Shock-absorbing washer. Detailed Implementation

[0028] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0029] Please see Figures 1 to 5As shown, a thread clamping and pulling mechanism for shortening thread ends in a sewing device according to this utility model includes a thread pulling assembly 1 and a thread clamping assembly 2 disposed above the thread pulling assembly 1. The thread pulling assembly 1 includes a first mounting plate 3, a thread pulling drive 4 disposed on the first mounting plate 3, and a thread pulling rod assembly 5 connected to the output end of the thread pulling drive 4. The thread clamping assembly 2 clamps and fixes the thread, and the thread pulling drive 4 drives the thread pulling rod assembly 5 to pull the clamped thread away from the thread clamping assembly 2, so that the thread is tightened and the thread end length of the sewing thread of the external sewing object is shortened.

[0030] The wire clamping assembly 2 includes a wire clamping electromagnet 6, a first adsorption member 7 fixedly disposed on the wire clamping electromagnet 6, a second adsorption member 8 movably disposed on the first adsorption member 7, and an elastic member for driving the second adsorption member 8 to reset; when the wire clamping electromagnet 6 is energized, it drives the first adsorption member 7 to approach the second adsorption member 8 to clamp the wire, and when the wire clamping electromagnet 6 is de-energized, the elastic member drives the second adsorption member 8 to reset.

[0031] The thread clamping assembly 2 uses a thread clamping electromagnet 6 to drive the first adsorption component 7 to approach the second adsorption component 8 to clamp the thread. Automated thread clamping operation is achieved upon power-up. Compared to traditional manual or complex mechanical thread clamping methods, this improves clamping efficiency, reduces human error, and allows the sewing device to quickly and accurately fix the thread upon startup, ensuring smooth subsequent sewing work. The electromagnet-driven thread clamping method has a large clamping force, ensuring the thread is firmly and stably clamped, preventing it from easily loosening or falling off. This provides a reliable guarantee for subsequent thread pulling and shortening, contributing to improved sewing quality and thread end treatment.

[0032] The first mounting plate 3 is provided with a first guide groove 9. The pull rod body assembly 5 includes a pull arm 11 and a movable plate 12. One end of the pull arm 11 is connected to the output end of the pull drive 4, and the other end away from the output end of the pull drive 4 is hinged to the movable plate 12 via a hinge shaft. The other side of the movable plate 12 away from the pull arm 11 is slidably disposed in the first guide groove 9. The pull drive 4 drives the pull arm 11 to swing, thereby causing the movable plate 12 to move linearly back and forth in the first guide groove 9. The reciprocating movement of the movable plate 12 causes the wire to be tightened.

[0033] The thread-pulling drive component 4 drives the thread-pulling swing arm 11 to swing, which in turn drives the moving plate 12 to move linearly back and forth within the first guide groove 9. This mechanical structure achieves the traction and tensioning of the thread. This design makes the thread-pulling process more efficient and stable, enabling the thread to be tightened quickly, effectively shortening the thread end length, and improving the overall working efficiency of the sewing device.

[0034] The first guide groove 9 on the first mounting plate 3 provides accurate guidance for the moving plate 12, enabling the moving plate 12 to move back and forth in a straight line along the preset path, thus ensuring the stability and accuracy of the wire pulling process.

[0035] The first mounting plate 3 is also provided with positioning holes, and the movable plate 12 is provided with first guide strip holes 14. Screws 15 are installed into the positioning holes on the first mounting plate 3 through the first guide strip holes 14 to limit the maximum displacement range of the movable plate 12.

[0036] The first mounting plate 3 has positioning holes, and the movable plate 12 has first guide strip holes 14. The movable plate 12 is fixed on the first mounting plate 3 by screws 15, and the maximum displacement range of the movable plate 12 can be precisely set. This design avoids excessive movement of the movable plate 12, which could lead to excessive stretching or damage of the wire, ensuring the controllability of the wire drawing process and improving the reliability and stability of the equipment.

[0037] The pull wire assembly 1 has a first threading hole 16. The end of the movable plate 12 away from the pull wire swing arm 11 is a free end. The free end of the movable plate 12 has a second threading hole 17. The wire passes through the first threading hole 16 and the second threading hole 17 in sequence and is pulled and tightened as the movable plate 12 reciprocates.

[0038] The first threading hole 16 on the threading assembly 1 and the second threading hole 17 at the free end of the moving plate 12 provide a smooth passage for the thread, allowing it to pass through smoothly and be pulled taut with the reciprocating motion of the moving plate 12. This design reduces friction and resistance of the thread during threading, improves threading efficiency, and reduces the risk of thread breakage.

[0039] An elastic buffer 18 is provided on the outer side of the hinge shaft connecting the wire-pulling arm 11 and the moving plate 12. The elastic buffer 18 on the outer side of the hinge shaft connecting the wire-pulling arm 11 and the moving plate 12 can buffer the impact force during the wire-pulling process, reduce mechanical wear, and extend the service life of the equipment.

[0040] The inner walls of the first threading hole 16 and the second threading hole 17 are embedded with ceramic rings. The ceramic rings have a smooth surface and good wear resistance, which can reduce the friction between the wire and the inner wall of the threading hole, protect the wire from damage, extend the service life of the wire, and also help maintain the tension and elasticity of the wire.

[0041] The wire clamping and pulling mechanism also includes a tension sensor, which is installed on the wire path between the wire clamping assembly 2 and the wire pulling assembly 1. The tension sensor is used to detect the wire tension in real time and transmit the tension data back to the external control center. The external control center is electrically connected to the wire clamping assembly 2 and the wire pulling assembly 1. The external control center adjusts the wire clamping electromagnet 6 of the wire clamping assembly 2 and the wire pulling drive 4 of the wire pulling assembly 1 according to the tension data.

[0042] Intelligent control of the equipment is achieved through electrical connection between an external control center and the thread clamping assembly 2 and the thread pulling assembly 1. The working states of the thread clamping electromagnet 6 and the thread pulling drive 4 are automatically adjusted based on tension data, enabling the equipment to adapt to different sewing needs and thread characteristics, thus improving its adaptability and flexibility.

[0043] The bottom of the first guide groove 9 is provided with a self-lubricating coating. The self-lubricating coating on the bottom of the first guide groove 9 reduces the friction of the moving plate 12 when it moves in the guide groove, making the movement smoother, reducing energy consumption, and also reducing the wear of the guide groove, thus extending the service life of the equipment.

[0044] A shock-absorbing washer 19 is provided between the screw 15 and the first guide strip hole 14. The shock-absorbing washer 19 is sleeved on the shank of the screw 15 and clamped between the head of the screw 15 and the surface of the first guide strip hole 14 of the moving plate 12. The shock-absorbing washer 19 between the screw 15 and the first guide strip hole 14 can effectively absorb and buffer the vibration generated during the wire pulling process, reduce the impact of vibration on the equipment, improve the stability and reliability of the equipment, and also help reduce noise pollution and improve the working environment.

[0045] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A thread clamping and pulling mechanism for shortening thread ends in a sewing device, characterized in that: The device includes a thread-pulling assembly (1) and a thread-clamping assembly (2) disposed above the thread-pulling assembly (1). The thread-pulling assembly (1) includes a first mounting plate (3), a thread-pulling drive member (4) disposed on the first mounting plate (3), and a thread-pulling rod assembly (5) connected to the output end of the thread-pulling drive member (4). The thread-clamping assembly (2) clamps and fixes the thread. The thread-pulling drive member (4) drives the thread-pulling rod assembly (5) to pull the clamped thread away from the thread-clamping assembly (2), thereby tightening the thread and shortening the length of the sewing thread of the external sewing object.

2. The thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 1, characterized in that: The wire clamping assembly (2) includes a wire clamping electromagnet (6), a first adsorption member (7) fixedly disposed on the wire clamping electromagnet (6), a second adsorption member (8) movably disposed on the first adsorption member (7), and an elastic member for driving the second adsorption member (8) to reset; when the wire clamping electromagnet (6) is energized, it drives the first adsorption member (7) to approach the second adsorption member (8) to clamp the wire; when the wire clamping electromagnet (6) is de-energized, the elastic member drives the second adsorption member (8) to reset.

3. The thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 1, characterized in that: The first mounting plate (3) is provided with a first guide groove (9). The pull rod body assembly (5) includes a pull arm (11) and a movable plate (12). One end of the pull arm (11) is connected to the output end of the pull drive (4), and the other end away from the output end of the pull drive (4) is hinged to the movable plate (12) via a hinge shaft. The movable plate (12) is slidably disposed in the first guide groove (9) on the other side away from the pull arm (11). The pull drive (4) drives the pull arm (11) to swing to drive the movable plate (12) to move linearly back and forth in the first guide groove (9). The reciprocating movement of the movable plate (12) drives the wire to be tightened.

4. A thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 3, characterized in that: The first mounting plate (3) is also provided with positioning holes, and the movable plate (12) is provided with first guide strip holes (14). Screws (15) are installed on the positioning holes on the first mounting plate (3) through the first guide strip holes (14) to limit the maximum displacement range of the movable plate (12).

5. A thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 3, characterized in that: The pull wire assembly (1) has a first thread hole (16). The end of the movable plate (12) away from the pull wire swing arm (11) is a free end. The free end of the movable plate (12) has a second thread hole (17). The wire passes through the first thread hole (16) and the second thread hole (17) in sequence and is pulled and tightened with the reciprocating motion of the movable plate (12).

6. A thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 3, characterized in that: An elastic buffer (18) is provided on the outside of the hinge shaft connecting the pull-wire swing arm (11) and the moving plate (12).

7. A thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 5, characterized in that: The inner walls of the first threading hole (16) and the second threading hole (17) are embedded with ceramic rings.

8. A thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 1, characterized in that: The wire clamping and pulling mechanism also includes a tension sensor, which is set on the wire path between the wire clamping assembly (2) and the wire pulling assembly (1) to detect the wire tension in real time and transmit the tension data back to the external control center. The external control center is electrically connected to the wire clamping assembly (2) and the wire pulling assembly (1). The external control center adjusts the wire clamping electromagnet (6) of the wire clamping assembly (2) and the wire pulling drive (4) of the wire pulling assembly (1) according to the tension data.

9. A thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 3, characterized in that: The bottom of the first guide groove (9) is provided with a self-lubricating coating.

10. A thread clamping and pulling mechanism for shortening thread ends in a sewing device according to claim 4, characterized in that: A shock-absorbing washer (19) is provided between the screw (15) and the first guide strip hole (14). The shock-absorbing washer (19) is sleeved on the screw (15) shank and clamped between the screw (15) head and the surface of the first guide strip hole (14) of the moving plate (12).

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