Large-space high-speed linking machine
By bending on the large shading of the sewing machine to form a bend and setting a concave position, the problem of material lag caused by small space in the existing sewing machine is solved, and the smoothness of material passing through and seam quality is improved.
Patent Information
- Application Number
- CN202421659350.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The existing sewing machine has a small space for over-sheets, which can easily stumble when the material passes, affecting the quality of the seam and possibly causing bad products to hang.
By bending at the rear end of the large mask to form a bent portion and setting a concave position on the inner side of the bent portion to accommodate the screw head so that the screw head does not protrude from the inner side of the large mask to expand the space through the sheet.
It realizes the smoothness of materials when passing through the sheet space, avoids lag and bad product hanging, and improves the working efficiency and product quality of the sewing machine.
Smart Images
Figure CN222795938U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of tray sewing machine products, in particular to a large-space high-speed tray sewing machine. Background technology:
[0002] Sewing machines are one of the important equipment in the wool textile industry. They are used to sew knitted garments, collars, cuffs, etc. In order to simplify the structure of sewing machines and improve their working efficiency, people have made a lot of efforts and achieved great results. However, with the continuous emergence of new chemical fiber fabric styles and the continuous changes in people's needs, higher and higher requirements have been put forward for the performance of sewing machines. The original various sewing machine structures have gradually shown their disadvantages. At present, there are generally two types of sewing machines on the market, one of which is the ordinary low-speed double groove transmission type; the other is the high-speed double external cam type. The common point is that the film passing space is relatively small, which is not good for the sweater to pass through, and it is easy to get stuck and hang the product, causing economic losses.
[0003] The high-speed sewing machine in the prior art generally includes a platform, a bracket installed on the side of the platform, a main shaft inserted in the platform and the bracket, a needle plate installed under the platform, a hook assembly installed on the outside of the bracket and cooperating with the needle plate, a first driving device for driving the hook assembly to work, a thread taking-up device installed on the outside of the bracket, a second driving device installed in the bracket and used to drive the thread taking-up device to work, a lower sheath fixed to the lower part of the bracket, a large mask and a small mask are arranged at the lower end of the lower sheath, the thread taking-up piece of the thread taking-up device is placed on the outside of the small mask, the curved needle in the hook assembly is placed on the outside of the large mask, the upper end of the needle plate, the lower end of the lower sheath and the large mask are The film-passing space formed between the large masking sheet and the small masking sheet, combined with the assembly structure of the large masking sheet 101 as shown in Figure 13, is as follows: the large masking sheet 101 is arc-shaped as a whole, and the rear end of the large masking sheet 101 is installed on the lower end of the fixing rod 103 through a screw 102, and the upper end of the fixing rod 103 is installed on the bracket or the lower end of the lower sheath; at this time, the head of the screw 102 is exposed on the inner side of the large masking sheet 101 and is placed in the film-passing space, so that when the material passes through the film-passing space later, it is very easy to contact with the head of the screw 102, which is easy to get stuck and affect the quality of the suture, and even the product will be damaged to cause economic losses, causing great trouble to the user.
[0004] In view of this, the inventor proposes the following technical solution. Utility model content:
[0005] The utility model aims to overcome the deficiencies of the prior art and provide a large-space high-speed plate sewing machine.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: the large-space high-speed sewing machine includes a platform, a bracket installed on the side of the platform, a main shaft inserted in the platform and the bracket, a needle plate installed under the platform, a hook assembly installed on the outside of the bracket and matched with the needle plate, a high and low synchronous transmission device for driving the hook assembly to work, a thread take-up device installed on the outside of the bracket, a driving device installed in the bracket and used to drive the thread take-up device to work, a lower sheath fixed to the lower part of the bracket, and a lower end of the lower sheath is provided There are a large mask and a small mask, the thread taking-up piece of the thread taking-up device is placed on the outside of the small mask, the curved needle in the hook needle assembly is placed on the outside of the large mask, and the film passing space is formed between the upper end of the needle disk, the lower end of the lower sheath, the large mask and the small mask. The rear end of the large mask is installed on the lower end of the fixing rod by a screw, and the upper end of the fixing rod is installed on the bracket or the lower end of the lower sheath; the rear end of the large mask is bent to form a bent portion, and a concave position is formed on the inner side surface of the bent portion, and the head of the screw is accommodated in the concave position, and the head of the screw does not protrude from the inner side surface of the large mask.
[0007] Furthermore, in the above technical solution, the depth dimension of the recess is greater than or equal to the height dimension of the head of the screw; the front and rear end faces of the lower end of the fixing rod are both set to be planes, and the lower end of the fixing rod is provided with strip holes which are longitudinally distributed and pass through the front and rear end faces, and the screw passes through the through holes and the strip holes of the bent part and is screwed fixed with the nut to lock the bent part to the lower end of the fixing rod, and the height of the large mask can be adjusted by loosening the screw or nut to adjust the longitudinal position of the screw in the strip hole and then locking the screw or nut.
[0008] Furthermore, in the above technical solution, the platform increases its own height to increase the height between the bracket and the needle disk, so that the height between the lower end of the lower sheath and the needle disk is increased to expand the size of the film transfer space.
[0009] Furthermore, in the above technical scheme, the high and low synchronous transmission device includes: a needle arm shaft movably installed in the bracket, an eccentric wheel and a needle swing lever movably installed on the bracket, a pull block fixedly sleeved with the needle arm shaft, a spring sleeved on the needle arm shaft and with two ends respectively contacting the inner wall of the bracket and the front side of the pull block, and a connecting rod connected between the pull block and the eccentric wheel, the crochet needle assembly includes a needle arm fixed to the end of the needle arm shaft, the curved needle is arranged at the lower end of the needle arm, one end of the needle swing lever is in contact with the rear side of the pull block, and the other end of the needle swing lever is in contact with the outer surface of the eccentric wheel, and the needle arm shaft is arranged at the lower edge of the bracket; the connecting rod includes a first rod body movably connected to the upper surface of the eccentric wheel, a second rod body movably connected to the pull block, and a connecting block connected between the first rod body and the second rod body and vertically distributed, the first rod body and the second rod body are distributed in parallel up and down; the needle swing lever includes a lever body and an extension block arranged at one end of the lever body and extending downward and used to contact the rear side of the pull block.
[0010] Furthermore, in the above technical solution, a wear-resistant sheet is fixed to the rear side of the pull block; the extension block is in direct contact with the wear-resistant sheet, or the extension block is in rolling contact with the wear-resistant sheet through a first rolling member.
[0011] Furthermore, in the above technical solution, the first rolling element is a bearing, the spiral passes through the inner circular hole of the bearing and is fixed to the lower end of the extension block, and the outer surface of the bearing protrudes beyond the outer side surface of the extension block.
[0012] Furthermore, in the above technical solution, the extension block is installed at one end of the lever body in a manner that the front and rear positions can be adjusted, wherein the extension block includes an extension block body and a screw portion integrally fixed to the outer side of the upper end of the extension block body, one end of the lever body is provided with transversely distributed through holes, the first rolling element is provided at the lower end of the extension block body, the screw portion is passed through the through holes, and the screw portion is also spirally installed with a first nut and a second nut, the first nut and the second nut are clamped and fixed on both sides of one end of the lever body, and the position relative to one end of the lever body can be adjusted by the first nut and the second nut cooperating with the screw portion; the other end of the lever body is provided with a rotatable second rolling element, and the outer surface of the second rolling element forms a rolling contact with the outer surface of the eccentric wheel.
[0013] Furthermore, in the above technical solution, a first rotating body that can rotate radially and axially is provided in the end of the first rod body, and the first rotating body is fixed to the upper surface of the eccentric wheel by a first screw; a second rotating body that can rotate radially and axially is provided in the end of the second rod body, and the second rotating body is fixedly connected to the pull block by a second screw.
[0014] Furthermore, in the above technical solution, the connecting block includes a connecting block main body, a first threaded section integrally fixedly connected to one side surface of the upper end of the connecting block main body, and a second threaded section integrally fixedly connected to the other side surface of the lower end of the connecting block main body, the first rod body is spirally fixed to the first threaded section and the distance relative to the connecting block main body can be adjusted, and the second rod body is spirally fixed to the second threaded section and the distance relative to the connecting block main body can be adjusted.
[0015] Furthermore, in the above technical solution, a third nut is spirally installed on the first threaded segment, and the third nut presses against the end of the first rod to lock it; a fourth nut is spirally installed on the second threaded segment, and the fourth nut presses against the end of the second rod to lock it.
[0016] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: when the utility model is in the process of sewing materials, when the materials pass through the film transfer space, since the head of the screw does not protrude from the inner side of the large cover plate, the material can pass through the film transfer space smoothly, and will not contact / hook the head of the screw to cause jamming and affect the quality of the stitching, and will not damage the product to cause economic losses. Therefore, it can not only improve the working efficiency and work quality of the sewing machine, but also improve the quality of the product to meet the production requirements. Description of the drawings:
[0017] Figure 1 It is a three-dimensional diagram of the utility model;
[0018] Figure 2 It is the front view of the utility model;
[0019] Figure 3 It is an assembly diagram of the large mask in the utility model;
[0020] Figure 4 This is an exploded view of the assembly of the large mask in the utility model;
[0021] Figure 5 It is the internal structure diagram of the utility model;
[0022] Figure 6 It is the front view of the internal structure of the utility model;
[0023] Figure 7 It is a three-dimensional diagram of the high and low synchronous transmission device in the utility model;
[0024] Figure 8 It is a stereogram of the high and low synchronous transmission device of the utility model from another perspective;
[0025] Fig. 9 It is an assembly diagram of the connecting rod and the eccentric wheel in the utility model;
[0026] Fig.10 It is a three-dimensional diagram of the needle swing lever in the utility model;
[0027] Fig.11 It is a three-dimensional diagram of the extension block in the utility model;
[0028] Fig.12 It is a three-dimensional diagram of the connecting block in the utility model;
[0029] Fig.13 It is an assembly diagram of a large matte in the prior art. Specific implementation method:
[0030] The utility model is further described below in conjunction with specific embodiments and drawings.
[0031] See Figure 1-12 As shown, a large-space high-speed sewing machine includes a platform 3, a bracket 1 installed on the side of the platform 3, a main shaft 31 passing through the platform 3 and the bracket 1, a power mechanism 30 installed in the platform 3 and used to drive the main shaft 31 to rotate, a needle plate 32 installed below the platform 3, a hook assembly 4 installed on the outside of the bracket 1 and matched with the needle plate 32, a high-low synchronous transmission device 2 for driving the hook assembly 4 to work, a thread take-up device 5 installed on the outside of the bracket 1, a driving device 51 installed in the bracket and used to drive the thread take-up device 5 to work, and a fixed The lower shield 6 at the lower part of the bracket 1, the driving device 51 is also installed on the Zhuzhou 31, the lower end of the lower shield 6 is provided with a large mask 7 and a small mask 8, the thread take-up piece 50 of the thread take-up device 5 is placed on the outside of the small mask 8, the curved needle 42 in the hook assembly 4 is placed on the outside of the large mask 7, the upper end of the needle plate 32, the lower end of the lower shield 6 and the large mask 7 and the small mask 8 form a film passing space 10, the rear end of the large mask 7 is installed on the lower end of the fixing rod 72 by a screw 71, and the upper end of the fixing rod 72 is installed on the bracket 1 or the lower end of the lower shield 6, the above is a conventional structure of a high-speed sewing machine.
[0032] In order to improve the working efficiency and working quality of the disc sewing machine, the utility model has made the following improvements: the rear end of the large mask 7 is bent to form a bending portion 701, and a concave position 702 is formed on the inner side of the bending portion 701, and the head of the screw 71 is accommodated in the concave position 702, and the head of the screw 71 does not protrude from the inner side of the large mask 7. When the utility model is sewing the material, when the material passes through the sheet-passing space, since the head of the screw 71 does not protrude from the inner side of the large mask 7, the material can smoothly pass through the sheet-passing space, and will not contact / hook the head of the screw 71 to cause jamming, affect the quality of the sewing, and will not damage the product to cause economic losses, thereby not only improving the working efficiency and working quality of the disc sewing machine, but also improving the quality of the product to meet the production requirements.
[0033] The depth of the recess 702 is greater than or equal to the height of the head of the screw 71, so that after the bending portion 701 is locked to the lower end of the fixing rod 72 by the screw 71, the head of the screw 71 is accommodated in the recess 702, so that the head of the screw 71 will not protrude from the inner side of the large cover 7.
[0034] The front and rear end surfaces of the lower end of the fixing rod 72 are both set as planes, and the lower end of the fixing rod 72 is provided with a strip hole 721 that is longitudinally distributed and penetrates the front and rear end surfaces. The screw 71 passes through the through hole 703 of the bending part 701 and the strip hole 721, and is screwed and fixed with the nut 73 to lock the bending part 701 to the lower end of the fixing rod 72. The height of the large mask 7 can be adjusted by loosening the screw 71 or the nut 73 to adjust the longitudinal position of the screw 71 in the strip hole 721 and then locking the screw 71 or the nut 73 to meet the adjustment requirements, and the operation is extremely convenient. Since the front and rear end surfaces of the lower end of the fixing rod 72 are both set as planes, the front and rear end surfaces of the lower end of the fixing rod 72 have a larger contact area with the bending part 701 and the nut 73, respectively, and are more stable. The screw 71 is also sleeved with a gasket 711, and the two side surfaces of the gasket 711 are in contact with the bending part 701 and the head of the screw 71, respectively, and the assembly structure is more stable.
[0035] The platform 3 increases its own height to increase the height between the bracket 1 and the needle disk 32, so that the height between the lower end of the lower sleeve 6 and the needle disk 32 is increased to expand the size of the film passing space 10, thereby enabling larger materials to pass through the film passing space 10, with better passability and less prone to jamming.
[0036] The high and low synchronous transmission device 2 includes: a needle arm shaft 21 movably installed in the bracket 1, an eccentric wheel 22 and a needle swing lever 23 movably installed on the bracket 1, a pull block 24 fixedly sleeved with the needle arm shaft 21, a spring 25 sleeved on the needle arm shaft 21 and with both ends respectively contacting the inner wall of the bracket 1 and the front side of the pull block 24, and a connecting rod 26 connected between the pull block 24 and the eccentric wheel 22. The hook needle assembly 4 includes a needle arm 41 fixed to the end of the needle arm shaft 21, and the curved needle 42 is arranged at the lower end of the needle arm 41. One end of the needle swing lever 23 contacts the rear side of the pull block 24, and the other end of the needle swing lever 23 contacts the outer surface of the eccentric wheel 22. When working, the eccentric wheel 22 After being driven to rotate, the pull block 24 is pulled to rotate by the connecting rod 26, thereby driving the needle arm shaft 21 to rotate. When the needle arm shaft 21 rotates, it drives the needle arm 41 installed at its end and the curved needle 42 on the needle arm 41 to swing up and down in an arc. At the same time, the eccentric wheel 22 will push the needle swing lever 23 to swing in the horizontal direction while rotating, thereby pressing and pushing the pull block 24 and the needle arm shaft 21 to slide in the axial direction. When the pull block 24 no longer presses and pushes the pull block 24, the pull block 24 passes through the elastic force range of the spring 25, thereby driving the needle arm shaft 21 to slide back and forth in the axial direction, thereby completing the needle insertion and removal action, and then cooperating with the small needle on the needle disk.
[0037] When the height of the bracket 1 is adjusted relative to the needle plate to increase the film feeding space 10, in order to ensure that the arc radius of the swing of the curved needle 42 remains unchanged or changes very little, and to minimize the number of parts whose sizes need to be changed, so that there is no need to replace too many parts, reduce production costs, and improve production efficiency, the utility model makes the following improvements:
[0038] The needle arm shaft 21 is arranged at the lower edge of the bracket 1, so that after the bracket 1 is raised relative to the needle disk, the relative height of the needle arm shaft 21 and the needle disk will not change or will change very little, thereby ensuring that the arc radius of the swing of the curved needle 42 remains unchanged or changes very little. When the bracket 1 is raised relative to the needle disk, the height of the eccentric wheel 22 will also be raised accordingly. At this time, without changing the relative position and size of the needle arm shaft 21 and the pull block 24, only the structure of the connecting rod 26 and the needle swing lever 23 is changed, thereby enabling the eccentric wheel 22 to drive the pull block 24 and the needle arm shaft 21 to move and work according to the original trajectory. Specifically, the connecting rod 26 includes a first rod body 261 movably connected to the upper surface of the eccentric wheel 22, a second rod body 262 movably connected to the pull block 24, and a connecting block 263 connected between the first rod body 261 and the second rod body 262 and vertically distributed. 61 and the second rod body 262 are distributed in parallel up and down, so that the connecting rod 26 is a Z-shaped rod body, which can pull the pull block 24 to operate according to the original trajectory when the eccentric wheel 22 rotates, and the connecting rod 26 has a stable structure; the needle swing lever 23 includes a lever body 231 and an extension block 232 arranged at one end of the lever body 231 and extending downward and used to contact the rear side of the pull block 24. The lever body 231 is extended downward by the extension block 232, so that the pull block 24 can be stably pushed to slide, and then the pull block 24 and the needle arm shaft 21 are driven to operate according to the original trajectory. That is to say, by improving the structure of the connecting rod 26 and the needle swing lever 23, the eccentric wheel 22 drives the needle arm shaft 21 to rotate circumferentially and slide axially synchronously in a high and low synchronous transmission mode, thereby driving the needle arm 41 and the curved needle 42 on the needle arm 41 to complete the needle insertion and extraction actions.
[0039] In order to prevent the pull block 24 from wearing, the following improvements are made: a wear-resistant sheet 241 is fixed to the rear side of the pull block 24; the extension block 232 is in direct contact with the wear-resistant sheet 241, or the extension block 232 forms rolling contact with the wear-resistant sheet 241 through the first rolling member 233. This embodiment, as a preferred embodiment, adopts the scheme that the extension block 232 forms rolling contact with the wear-resistant sheet 241 through the first rolling member 233, and the friction force is small, which can reduce the wear of the wear-resistant sheet 241 and thus improve its service life. Among them, the first rolling member 233 is a bearing, which spirally passes through the inner circular hole of the bearing and is fixed to the lower end of the extension block 232, and the outer surface of the bearing protrudes beyond the outer side surface of the extension block 232.
[0040] In order to enable the extension block 232 to better press against the wear-resistant sheet 241 and the pull block 24, the utility model also makes the following improvements: the extension block 232 is installed at one end of the lever body 231 in a manner that the front and rear positions can be adjusted, that is, the tension of the extension block 232 in contact with the wear-resistant sheet 241 and the pull block 24 can be adjusted.
[0041] Specifically, the extension block 232 includes an extension block main body 2321 and a screw portion 2322 integrally fixed to the outer side of the upper end of the extension block main body 2321. One end of the lever main body 231 is provided with a transversely distributed through hole. The first rolling member 233 is arranged at the lower end of the extension block main body 2321. The screw portion 2322 is penetrated in the through hole, and the screw portion 2322 is also spirally installed with a first nut 2323 and a second nut 2324. The first nut 2323 and the second nut 2324 are clamped and fixed on both sides of one end of the lever main body 231, and the position relative to one end of the lever main body 231 can be adjusted by the first nut 2323 and the second nut 2324 cooperating with the screw portion 2322. The structure is extremely simple, and the position / interval size between the extension block 232 and one end of the lever main body 231 can be adjusted more conveniently, so as to adjust the tension of the extension block 232 in contact with the pressing wear-resistant plate 241 and the pull block 24.
[0042] In order to make the assembly of the screw part 2322 and the perforation more stable and to prevent the screw part 2322 from rotating relative to the perforation, the following design is also made: a top pressure plane 2320 is also provided on the screw part 2322, and a screw hole 2312 that passes through the perforation is downwardly opened on the upper surface of one end of the lever body 231, and a headless screw is spirally fixed to the screw hole 2312 and presses against the top pressure plane 2320 to lock the screw part 2322 in the perforation, thereby making the assembly of the screw part 2322 and the perforation more stable and to prevent the screw part 2322 from rotating relative to the perforation.
[0043] A rotatable second rolling member 2313 is provided at the other end of the lever body 231, and the outer surface of the second rolling member 2313 forms a rolling contact with the outer surface of the eccentric wheel 22, which can reduce friction and further reduce the wear of the eccentric wheel 22, thereby achieving the purpose of protecting the eccentric wheel 22 and increasing its product service life.
[0044] A first rotating body 264 capable of radial and axial rotation is provided at the end of the first rod body 261, and the first rotating body 264 is fixed to the upper surface of the eccentric wheel 22 by a first screw 265; a second rotating body 266 capable of radial and axial rotation is provided at the end of the second rod body 262, and the second rotating body 266 is fixedly connected to the pull block 24 by a second screw 267, so that when the eccentric wheel 22 rotates, it can pull the pull block 24 to swing stably through the connecting rod 26, even if the connecting rod 26 is offset during operation, it can be corrected by assembling the first rotating body 264 and the second rotating body 266, thereby ensuring the stability and accuracy of operation.
[0045] The connecting block 263 includes a connecting block body 2631, a first threaded section 2632 integrally fixedly connected to one side surface of the upper end of the connecting block body 2631, and a second threaded section 2633 integrally fixedly connected to the other side surface of the lower end of the connecting block body 2631. The first rod body 261 and the first threaded section 2632 are spirally fixed and the distance relative to the connecting block body 2631 can be adjusted. The second rod body 262 and the second threaded section 2633 are spirally fixed and the distance relative to the connecting block body 2631 can be adjusted. The assembly structure is extremely simple and it is also very easy to install.
[0046] A third nut 2634 is also screwed on the first threaded section 2632, and the third nut 2634 presses against the end of the first rod body 261 to lock it; a fourth nut 2635 is also screwed on the second threaded section 2633, and the fourth nut 2635 presses against the end of the second rod body 262 to lock it, thereby ensuring the stability of the assembly structure.
[0047] To sum up, when the utility model is in the process of sewing materials, when the materials pass through the film transfer space, since the head of the screw 71 does not protrude from the inner side of the large cover plate 7, the material can smoothly pass through the film transfer space without contacting / hanging with the head of the screw 71 to cause jamming and affect the quality of the stitching, and even less will the products be damaged to cause economic losses. Therefore, it can not only improve the working efficiency and work quality of the sewing machine, but also improve the quality of the products to meet the production requirements.
[0048] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.
Claims
1. A large-space high-speed sewing machine, comprising a platform (3), a bracket (1) mounted on the side of the platform (3), a main shaft (31) passing through the platform (3) and the bracket (1), a needle plate (32) mounted below the platform (3), a hook assembly (4) mounted on the outside of the bracket (1) and cooperating with the needle plate (32), a high-low synchronous transmission device (2) for driving the hook assembly (4) to work, a thread take-up device (5) mounted on the outside of the bracket (1), a driving device (51) mounted in the bracket and used to drive the thread take-up device (5) to work, and a thread take-up device (51) fixed to the bracket (1) ) at the lower part of the lower shield (6), a large shield (7) and a small shield (8) are arranged at the lower end of the lower shield (6), a thread pick-up piece (50) of the thread pick-up device (5) is placed outside the small shield (8), a curved needle (42) in the hook needle assembly (4) is placed outside the large shield (7), and a sheet-passing space (10) is formed between the upper end of the needle plate (32), the lower end of the lower shield (6), and the large shield (7) and the small shield (8), the rear end of the large shield (7) is mounted on the lower end of the fixing rod (72) by means of a screw (71), and the upper end of the fixing rod (72) is mounted on the bracket (1) or the lower end of the lower shield (6); Features: The rear end of the large cover plate (7) is bent to form a bent portion (701), and the inner side surface of the bent portion (701) forms a concave position (702), the head of the screw (71) is accommodated in the concave position (702), and the head of the screw (71) does not protrude from the inner side surface of the large cover plate (7).
2. A large-space high-speed plate sewing machine according to claim 1, characterized in that: The depth dimension of the recess (702) is greater than or equal to the height dimension of the head of the screw (71); the front and rear end surfaces of the lower end of the fixing rod (72) are both arranged to be planes, and the lower end of the fixing rod (72) is provided with strip holes (721) distributed longitudinally and penetrating the front and rear end surfaces; the screw (71) passes through the through hole (703) and the strip hole (721) of the bent portion (701) and is screwedly fixed with the nut (73) to lock the bent portion (701) to the lower end of the fixing rod (72); and the height of the large mask (7) can be adjusted by loosening the screw (71) or the nut (73) to adjust the longitudinal position of the screw (71) in the strip hole (721) and then locking the screw (71) or the nut (73).
3. A large-space high-speed plate sewing machine according to claim 1, characterized in that: The platform (3) increases its own height to increase the height between the bracket (1) and the needle disk (32), thereby increasing the height between the lower end of the lower sheath (6) and the needle disk (32), thereby expanding the size of the film transfer space (10).
4. A large space high speed sewing machine according to any one of claims 1 to 3, characterized in that: The high-low synchronous transmission device (2) comprises: a needle arm shaft (21) movably mounted in the bracket (1), an eccentric wheel (22) and a needle swing lever (23) movably mounted on the bracket (1), a pull block (24) fixedly sleeved on the needle arm shaft (21), a spring (25) sleeved on the needle arm shaft (21) and having two ends respectively in contact with the inner wall of the bracket (1) and the front side of the pull block (24), and a connecting rod (26) connected between the pull block (24) and the eccentric wheel (22). The hook needle assembly (4) comprises a needle arm (41) fixed to the end of the needle arm shaft (21), the curved needle (42) is arranged at the lower end of the needle arm (41), one end of the needle swing lever (23) is in contact with the rear side of the pull block (24), and the needle swing lever (23) is in contact with the rear side of the pull block (24). ) and the other end of the needle arm shaft (21) contacts the outer surface of the eccentric wheel (22), and the needle arm shaft (21) is arranged at the lower edge of the bracket (1); the connecting rod (26) comprises a first rod body (261) movably connected to the upper surface of the eccentric wheel (22), a second rod body (262) movably connected to the pull block (24), and a connecting block (263) connected between the first rod body (261) and the second rod body (262) and vertically distributed, and the first rod body (261) and the second rod body (262) are distributed in parallel up and down; the needle swing lever (23) comprises a lever body (231) and an extension block (232) arranged at one end of the lever body (231), extending downward and used to contact the rear side of the pull block (24).
5. A large-space high-speed plate sewing machine according to claim 4, characterized in that: A wear-resistant sheet (241) is fixed to the rear side of the pull block (24); the extension block (232) is in direct contact with the wear-resistant sheet (241), or the extension block (232) forms rolling contact with the wear-resistant sheet (241) through a first rolling member (233).
6. A large-space high-speed plate sewing machine according to claim 5, characterized in that: The first rolling element (233) is a bearing, which spirally passes through the inner circular hole of the bearing and is fixed to the lower end of the extension block (232), and the outer surface of the bearing protrudes outside the outer side surface of the extension block (232).
7. The large-space high-speed plate sewing machine according to claim 5, characterized in that: The extension block (232) is mounted on one end of the lever body (231) in a manner that the front and rear positions can be adjusted, wherein the extension block (232) comprises an extension block body (2321) and a screw portion (2322) integrally fixed to the outer side of the upper end of the extension block body (2321), one end of the lever body (231) is provided with transversely distributed through holes, the first rolling element (233) is arranged at the lower end of the extension block body (2321), the screw portion (2322) is penetrated in the through hole, and the screw portion (2322) is also spirally mounted with a first A nut (2323) and a second nut (2324) are clamped and fixed on both sides of one end of the lever body (231), and the first nut (2323) and the second nut (2324) can be used to cooperate with the screw rod (2322) to adjust the position relative to the one end of the lever body (231); the other end of the lever body (231) is provided with a rotatable second rolling member (2313), and the outer surface of the second rolling member (2313) forms rolling contact with the outer surface of the eccentric wheel (22).
8. The large-space high-speed plate sewing machine according to claim 4, characterized in that: A first rotating body (264) that can rotate radially and axially is disposed at the end of the first rod body (261), and the first rotating body (264) is fixed to the upper surface of the eccentric wheel (22) via a first screw (265); a second rotating body (266) that can rotate radially and axially is disposed at the end of the second rod body (262), and the second rotating body (266) is fixedly connected to the puller block (24) via a second screw (267).
9. A large-space high-speed plate sewing machine according to claim 4, characterized in that: The connecting block (263) comprises a connecting block body (2631), a first threaded section (2632) integrally fixedly connected to one side surface of an upper end of the connecting block body (2631), and a second threaded section (2633) integrally fixedly connected to the other side surface of a lower end of the connecting block body (2631); the first rod body (261) and the first threaded section (2632) are screw-fixed and their distance relative to the connecting block body (2631) can be adjusted; the second rod body (262) and the second threaded section (2633) are screw-fixed and their distance relative to the connecting block body (2631) can be adjusted.
10. A large-space high-speed plate sewing machine according to claim 9, characterized in that: A third nut (2634) is also screwed onto the first threaded section (2632), and the third nut (2634) presses against the end of the first rod body (261) to lock it; a fourth nut (2635) is also screwed onto the second threaded section (2633), and the fourth nut (2635) presses against the end of the second rod body (262) to lock it.