Yarn shear screwing device

Abstract

The utility model provides a yarn shear screwing device which comprises a screwing mechanism for rotating and assembling a left shear handle and a right shear handle, the screwing mechanism is provided with a screwing claw for rotating and assembling the right shear handle to the left shear handle and a fixing claw for fixing the left shear handle, and the left shear handle and the right shear handle are placed on a shear handle positioning mold. The left shear handle and the right shear handle are arranged on the rotating disc, the screwing center of the left shear handle and the screwing center of the right shear handle are positioned through the shear handle center positioning column, the shear handle positioning mold and the shear handle center positioning column are arranged on the rotating disc, and the screwing mechanism is arranged on the transferring mechanism and moved to the left shear handle and the right shear handle through the transferring mechanism. The device can replace manpower to rotate and assemble the left and right scissor handles, improves the assembly efficiency of the yarn scissors, reduces the potential safety hazard of manual assembly, and provides a solid foundation for automatic assembly of the yarn scissors.

Description

Technical Field

[0001] This utility model relates to the field of yarn shear assembly technology, and in particular to a yarn shear twisting device. Background Technology

[0002] A yarn shears is a pair of scissors useful for trimming thread ends in both hand and machine sewing. It's a commonly used garment tool, particularly sharp for cutting fine threads and thin fabrics. This handheld tool is lightweight and easy to use. The yarn shears mainly consist of a first handle with a first cutting blade and a second handle with a second cutting blade, as well as a locking mechanism on the first and second handles. The ends of the first and second handles are rotatably connected and equipped with a return spring. During use, the first and second cutting blades cut, and the return spring returns the shears to their original position after cutting. In existing technologies, there is a scissor assembly line, such as Chinese Patent Publication No. CN114260705A. The scissor handle is placed in a scissor fixture within the scissor handle loading station by a scissor handle feeding mechanism. The indexing plate rotates to the scissor blade loading station, where the scissor blade loading mechanism places the scissor blade in the scissor fixture. After rotating to the first pre-riveting station, the first pressing riveting station, the second pre-riveting station, and the second pressing riveting station, two rivets are sequentially riveted together. The blade is then sent to the scissor unloading station, where the scissor unloading mechanism sends the scissor to the scissor shaping mechanism for correction and shaping before sending it to the unloading assembly. The unloading assembly then sends the scissor out of the assembly line. Throughout the entire process, workers only need to replenish the scissor blade, scissor handle, and rivets. The assembly and riveting work is fully automated. Only the assembled half-scissors need to be assembled into finished scissors for shipment, greatly improving the assembly efficiency of the scissors, reducing the workload and labor costs for workers, and avoiding accidental injuries that can occur during manual riveting. However, this only completed the assembly of the scissors and handles. The subsequent installation of the springs, the rotation and assembly of the left and right handles, and the riveting and fixing of the left and right handles still heavily relied on manual assembly, which was inefficient. Utility Model Content

[0003] This invention solves the problem that the rotational assembly of the left and right shear handles still heavily relies on manual assembly. It proposes a yarn shear rotational assembly device that can replace manual rotation of the left and right shear handles, improve the efficiency of yarn shear assembly, reduce the safety hazards of manual assembly, and provide a solid foundation for automatic yarn shear assembly.

[0004] To achieve the above objectives, the following technical solution is proposed:

[0005] A yarn shearing and joining device includes a joining mechanism for rotating and joining left and right shear handles. The joining mechanism is provided with a joining claw for rotating and joining the right shear handle to the left shear handle and a fixing claw for fixing the left shear handle. The left and right shear handles are placed on a shear handle positioning mold, and the joining center of the left and right shear handles is positioned by a shear handle center positioning post. The shear handle positioning mold and the shear handle center positioning post are set on a rotating disk. The joining mechanism is set on a transfer mechanism, and the transfer mechanism moves the joining mechanism to the left and right shear handles.

[0006] This invention utilizes a rotating claw and a fixing claw to replace manual rotation and assembly of the left and right shear handles. A shear handle positioning mold and a central positioning post are used to initially position the mounting holes of the left and right shear handles. The fixing claw then clamps the left shear handle, while the rotating claw rotates the right shear handle towards the left, with the rotation center at the axis of the mounting hole. Additionally, the rotating claw pushes the right shear handle outwards until its limiting block rotates beyond the inner side of the left shear handle's limiting block. The rotating claw then pulls the right shear handle inwards, locking its limiting block within the left shear handle's limiting block. Finally, the rotating claw returns to its original position, completing the rotation and assembly of the left and right shear handles. This invention replaces manual rotation and assembly of the left and right shear handles, improving the efficiency of yarn shear assembly, reducing safety hazards associated with manual assembly, and providing a solid foundation for automated yarn shear assembly.

[0007] Preferably, when the left and right scissor handles are positioned in the scissor handle positioning mold, the screw-in centers of the mounting holes of the left and right scissor handles coincide, and the diameter of the scissor handle center positioning post is smaller than the diameter of the mounting holes of the left and right scissor handles. The purpose of this design is to provide sufficient torsional space for the right scissor handle to move forward, thus preventing damage to the left and right scissor handles during assembly.

[0008] Preferably, the engagement claw includes an engagement rocker arm, one end of which is connected to the conveying end of an engagement motor fixed on a transfer mechanism, and the other end of which is fixed with a first bracket perpendicular to the engagement rocker arm. A first push-pull motor is provided at the connection between the first bracket and the engagement rocker arm, and an engagement claw limiting block is provided at the other end of the first bracket. The output end of the first push-pull motor is connected to a first claw that is slidably connected to the engagement claw limiting block. The first claw has two parallel first protrusions, and the right scissor handle is locked between the two parallel first protrusions.

[0009] The first claw of this utility model serves as the push-pull claw of the right scissor handle, therefore two parallel first protrusions are required. Only when the right scissor handle is locked between the two parallel first protrusions can the push-pull of the right scissor handle be effectively limited. The rotation center of the engagement rocker arm should be on the same axis as the engagement center of the left and right scissor handles.

[0010] Preferably, the fixed claw is provided with a second bracket connected to the transfer mechanism. A second push-pull motor is provided at the connection between the second bracket and the transfer mechanism. A fixed claw limiting block is provided at the other end of the second bracket. A second claw is slidably connected to the fixed claw limiting block at the output end of the second push-pull motor. The second claw is provided with a second boss parallel to the end face of the fixed claw limiting block. The left scissor handle is locked between the second boss and the fixed claw limiting block.

[0011] Preferably, the transfer mechanism includes a base, the base is equipped with a lifting motor, the vertical output end of the lifting motor is connected to a lifting platform, the lifting platform is horizontally slidably connected to a translation mechanism, the translation mechanism is connected to a translation cylinder fixed on the lifting platform, and the engagement mechanism is disposed on the translation mechanism.

[0012] In order to mass-produce the rotating assembly of the left and right shear handles, the left and right shear handles to be rotated and assembled are positioned by the shear handle positioning mold and the shear handle center positioning post, and then continuously moved to the front of the rotating mechanism with the rotating disk. The purpose of setting up the transfer mechanism is to enable the rotating mechanism to move to the correct work position and align the left and right shear handles.

[0013] Preferably, the bottom of the lifting platform is provided with several vertical positioning columns, and the base is provided with several positioning cylinders corresponding to the positioning columns. The positioning columns are slidably connected inside the positioning cylinders, and lubricant is provided between the positioning columns and the positioning cylinders. This invention, by setting the positioning columns and positioning cylinders, increases the smoothness of the lifting platform's lifting movement.

[0014] Preferably, the lifting platform is provided with two parallel slide rails above it, the translation mechanism includes a translation platform and a screw-fit mounting base arranged perpendicular to the translation platform, the translation platform is slidably connected to the slide rails, the translation platform is connected to the output end of the translation cylinder, and the screw-fit mechanism is arranged on the screw-fit mounting base.

[0015] The beneficial effects of this utility model are: this utility model can replace manual rotation and assembly of the left and right shear handles, improve the efficiency of yarn shear assembly, reduce the safety hazards of manual assembly, and provide a solid foundation for automatic yarn shear assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is an enlarged view of a partial structure of this utility model.

[0018] The components are as follows: 1. Screwing mechanism; 2. Screwing claw; 3. Fixed claw; 4. Scissor handle positioning mold; 5. Scissor handle center positioning post; 6. Base; 7. Rotating disk; 8. Lifting platform; 9. Translation mechanism; 10. Lifting motor; 11. Translation cylinder; 21. Screwing rocker arm; 22. First push-pull motor; 23. Screwing claw limit block; 24. First claw; 25. Screwing motor; 31. Second push-pull motor; 32. Fixed claw limit block; 33. Second claw; 61. Positioning cylinder; 81. Slide rail; 82. Positioning post; 91. Translation platform; 92. Screwing mounting base. Detailed Implementation

[0019] Example:

[0020] This embodiment proposes a yarn shearing and twisting device, referring to... Figure 1 The device includes a screw-fitting mechanism 1 for rotating and assembling the left and right shear handles. The screw-fitting mechanism 1 has a screw-fitting claw 2 for rotating and assembling the right shear handle to the left shear handle and a fixing claw 3 for fixing the left shear handle. The left and right shear handles are placed on a shear handle positioning mold 4, and the screw-fitting center of the left and right shear handles is positioned by a shear handle center positioning post 5. The shear handle positioning mold 4 and the shear handle center positioning post 5 are set on a rotating disk 7. The screw-fitting mechanism 1 is set on a transfer mechanism, and the transfer mechanism moves the screw-fitting mechanism 1 to the left and right shear handles.

[0021] This invention uses a rotating claw 2 and a fixing claw 3 to replace manual rotation and assembly of the left and right shear handles. The shear handle positioning mold 4 and the shear handle center positioning post 5 are used to initially position the mounting holes of the left and right shear handles. Then, the fixing claw 3 clamps the left shear handle, and the rotating claw 2 rotates the right shear handle towards the left, with the rotation center being the axis of the mounting hole. Furthermore, the rotating claw 2 pushes the right shear handle outwards until the limiting block of the right shear handle rotates beyond the inner side of the limiting block of the left shear handle. The rotating claw 2 then pulls the right shear handle inwards, causing the limiting block of the right shear handle to lock into the limiting block of the left shear handle. The rotating claw 2 then resets, completing the rotation and assembly of the left and right shear handles. This invention can replace manual rotation and assembly of the left and right shear handles, improving the efficiency of yarn shear assembly, reducing the safety hazards of manual assembly, and providing a solid foundation for automatic yarn shear assembly.

[0022] When the left and right scissor handles are positioned in the scissor handle positioning mold 4, the screw-in centers of the mounting holes of the left and right scissor handles coincide, and the diameter of the scissor handle center positioning post 5 is smaller than the diameter of the mounting holes of the left and right scissor handles. The purpose of this design is to provide a certain amount of torsional space for the right scissor handle to move forward, thus avoiding damage to the left and right scissor handles during assembly.

[0023] refer to Figure 2The engaging claw 2 includes an engaging rocker arm 21. One end of the engaging rocker arm 21 is connected to the conveying end of an engaging motor 25 fixed on a transfer mechanism. The other end of the engaging rocker arm 21 is fixed with a first bracket perpendicular to the engaging rocker arm 21. A first push-pull motor 22 is provided at the connection between the first bracket and the engaging rocker arm 21. The other end of the first bracket is provided with an engaging claw limiting block 23. The output end of the first push-pull motor 22 is connected to a first claw 24 slidably connected to the engaging claw limiting block 23. The first claw 24 has two parallel first protrusions, and the right scissor handle is locked between the two parallel first protrusions. In this invention, the first claw 24 serves as the push-pull claw for the right scissor handle, therefore, it is necessary to provide two parallel first protrusions. Only when the right scissor handle is locked between the two parallel first protrusions can the push-pull of the right scissor handle be effectively limited. The rotation center of the engaging rocker arm 21 should be on the same axis as the engaging center of the left and right scissor handles. The fixed claw 3 is provided with a second bracket connected to the transfer mechanism. A second push-pull motor 31 is provided at the connection between the second bracket and the transfer mechanism. A fixed claw limiting block 32 is provided at the other end of the second bracket. A second claw 33 is slidably connected to the fixed claw limiting block 32 at the output end of the second push-pull motor 31. The second claw 33 is provided with a second boss parallel to the end face of the fixed claw limiting block 32. The left scissor handle is locked between the second boss and the fixed claw limiting block 32.

[0024] refer to Figure 1 The transfer mechanism includes a base 6, on which a lifting motor 10 is mounted. The vertical output end of the lifting motor 10 is connected to a lifting platform 8. A horizontally sliding translation mechanism 9 is connected to the lifting platform 8. The translation mechanism 9 is connected to a translation cylinder 11 fixed on the lifting platform 8. A screw-fitting mechanism 1 is mounted on the translation mechanism 9. This invention is designed for the batch rotational assembly of left and right shear handles. After the left and right shear handles to be rotated and assembled are positioned by the shear handle positioning mold 4 and the shear handle center positioning post 5, they continuously move to the front of the screw-fitting mechanism 1 along with the rotating disk 7. The purpose of the transfer mechanism is to enable the screw-fitting mechanism 1 to move to the correct position and align with the left and right shear handles. (Reference) Figure 2The bottom of the lifting platform 8 is provided with several vertical positioning columns 82, and the base 6 is provided with several positioning cylinders 61 corresponding to the positioning columns 82. The positioning columns 82 are slidably connected to the positioning cylinders 61, and a lubricant is provided between the positioning columns 82 and the positioning cylinders 61. The positioning columns 82 and positioning cylinders 61 in this utility model increase the stability of the lifting movement of the lifting platform 8. Two parallel slide rails 81 are provided above the lifting platform 8. The translation mechanism 9 includes a translation platform 91 and a screw-fit mounting base 92 arranged perpendicular to the translation platform 91. The translation platform 91 is slidably connected to the slide rails 81. The translation platform 91 is connected to the output end of the translation cylinder 11. The screw-fit mechanism 1 is set on the screw-fit mounting base 92. That is, the screw-fit motor 25 is fixed on the screw-fit mounting base 92, and the output shaft of the screw-fit motor 25 passes through the screw-fit mounting base 92 and is connected to one end of the screw-fit rocker arm 21. The first bracket is connected to the screw-fit mounting base 92.

[0025] The working principle of this utility model is as follows:

[0026] 1. After the left and right scissor handles are positioned by the scissor handle positioning mold 4 and the scissor handle center positioning post 5, they move to the front of the screwing mechanism 1 along with the rotating disk 7;

[0027] 2. Under the action of the lifting platform 8 and the translation mechanism 9, the rotating claw 2 and the fixed claw 3 are driven to lock onto the outer top of the left and right scissor handles from bottom to top;

[0028] 3. The outer top of the right scissor handle is locked between the two parallel first protrusions of the screw-on claw 2; the left scissor handle is locked between the second protrusion and the fixed claw limiting block 32.

[0029] 4. The second push-pull motor 31 operates, pulling the second boss toward the fixed claw limiting block 32 to clamp the left scissor handle;

[0030] 5. The engagement motor 25 operates, driving the engagement rocker arm 21 to rotate, thereby causing the right scissor handle to rotate around the mounting hole as the axis to the left scissor handle; 6. The first push-pull motor 22 operates, pushing the engagement claw 2 outward, so that the limiting block of the right scissor handle does not interfere with the limiting block of the left scissor handle, until the limiting block of the right scissor handle rotates beyond the inner side of the limiting block of the left scissor handle, the engagement claw 2 pulls the right scissor handle inward, the first push-pull motor 22 operates again, pulling the engagement claw 2 inward, so that the limiting block of the right scissor handle is locked inside the limiting block of the left scissor handle, completing the rotational assembly of the left and right scissor handles.

Claims

1. A yarn shearing and twisting device, characterized in that, The device includes a screw-fitting mechanism (1) for rotating and assembling the left and right scissor handles. The screw-fitting mechanism (1) is provided with a screw-fitting claw (2) for rotating and assembling the right scissor handle to the left scissor handle and a fixing claw (3) for fixing the left scissor handle. The left and right scissor handles are placed on a scissor handle positioning mold (4), and the screw-fitting center of the left and right scissor handles is positioned by a scissor handle center positioning post (5). The scissor handle positioning mold (4) and the scissor handle center positioning post (5) are set on a rotating disk (7). The screw-fitting mechanism (1) is set on a transfer mechanism, and the transfer mechanism moves the screw-fitting mechanism (1) to the left and right scissor handles.

2. The yarn shearing and twisting device according to claim 1, characterized in that, When the left and right scissor handles are in the scissor handle positioning mold (4), the screwing centers of the mounting holes of the left and right scissor handles coincide, and the diameter of the scissor handle center positioning post (5) is smaller than the diameter of the mounting holes of the left and right scissor handles.

3. The yarn shearing and twisting device according to claim 1, characterized in that, The engagement claw (2) includes an engagement rocker arm (21). One end of the engagement rocker arm (21) is connected to the conveying end of the engagement motor (25) fixed on the transfer mechanism. The other end of the engagement rocker arm (21) is fixed with a first bracket perpendicular to the engagement rocker arm (21). A first push-pull motor (22) is provided at the connection between the first bracket and the engagement rocker arm (21). The other end of the first bracket is provided with an engagement claw limiting block (23). The output end of the first push-pull motor (22) is connected to a first claw (24) that is slidably connected to the engagement claw limiting block (23). The first claw (24) is provided with two parallel first protrusions. The right scissor handle is locked between the two parallel first protrusions.

4. The yarn shearing and twisting device according to claim 3, characterized in that, The fixed claw (3) is provided with a second bracket connected to the transfer mechanism. A second push-pull motor (31) is provided at the connection between the second bracket and the transfer mechanism. A fixed claw limiting block (32) is provided at the other end of the second bracket. A second claw (33) is slidably connected to the fixed claw limiting block (32) at the output end of the second push-pull motor (31). The second claw (33) is provided with a second boss parallel to the end face of the fixed claw limiting block (32). The left scissor handle is locked between the second boss and the fixed claw limiting block (32).

5. A yarn shearing and twisting device according to any one of claims 1-4, characterized in that, The transfer mechanism includes a base (6), the base (6) is provided with a lifting motor (10), the vertical output end of the lifting motor (10) is connected to a lifting platform (8), the lifting platform (8) is horizontally slidably connected to a translation mechanism (9), the translation mechanism (9) is connected to a translation cylinder (11) fixed on the lifting platform (8), and the engagement mechanism (1) is set on the translation mechanism (9).

6. The yarn shearing and twisting device according to claim 5, characterized in that, The bottom of the lifting platform (8) is provided with several vertical positioning columns (82), and the base (6) is provided with several positioning cylinders (61) corresponding to the positioning columns (82). The positioning columns (82) are slidably connected inside the positioning cylinders (61), and a lubricant is provided between the positioning columns (82) and the positioning cylinders (61).

7. The yarn shearing and twisting device according to claim 5, characterized in that, The lifting platform (8) is provided with two parallel slide rails (81) above it. The translation mechanism (9) includes a translation platform (91) and a screw-fit mounting base (92) arranged perpendicularly to the translation platform (91). The translation platform (91) is slidably connected to the slide rails (81). The translation platform (91) is connected to the output end of the translation cylinder (11). The screw-fit mechanism (1) is set on the screw-fit mounting base (92).

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