High-speed linking machine
By adopting synchronous belt drive and a synchronous pulley with no side guard in the sewing machine, the problems of high noise, severe wear and inconvenience of operation of high-speed sewing machines are solved, and a high-speed sewing effect with low noise, long life and low failure rate is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-03-31
AI Technical Summary
Existing sewing machines suffer from problems such as high noise, severe wear, small feed holes, and inconvenient operation. In particular, the bevel gear transmission in high-speed sewing machines is prone to damage, resulting in a high failure rate.
A synchronous belt drive structure is adopted to replace the bevel gear drive. Combined with the flangeless design of the synchronous belt pulley and the fixing method of the secondary shaft, the drive structure is simplified to drive the needle and hook by the first secondary shaft, thereby increasing the space of the plate hole.
It reduces machine noise, minimizes wear, extends service life, simplifies the structure, lowers the failure rate, and improves ease of operation.
Smart Images
Figure CN224063034U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to knitting machinery and equipment, and more particularly to a high-speed sewing machine. Background Technology
[0002] The sewing machine is an important piece of equipment for sewing sweaters. Currently, there are two main types of sewing machines on the market: one is the ordinary linkage sewing machine, which has the advantages of simple structure and wide applicability, but the disadvantages of unstable performance and slow speed; the other is the high-speed sewing machine, which has the advantages of stable performance and high speed, but the disadvantages of the large needle swing arm using bevel gear transmission, which is prone to wear after long-term operation, resulting in increased noise, skipped stitches and other malfunctions. In addition, the small feed hole makes some processes inconvenient to operate. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned sewing machine and to propose a high-speed sewing machine.
[0004] This utility model is achieved through the following technical solution: a high-speed sewing machine includes: a platform, a bracket mounted on the platform, a gear mounted inside the platform, a central plate mounted under the platform, a needle plate mounted on the outer ring of the central plate, a synchronous belt drive structure mounted on the platform and the bracket, a hook thread structure mounted on the bracket and driven by the synchronous belt drive structure, and a needle drive structure mounted below the bracket and driven by the synchronous belt drive structure. The synchronous belt drive structure includes a drive shaft and a first auxiliary shaft mounted on the platform, a second auxiliary shaft mounted on the bracket, and a structure installed between the drive shaft and the first and second auxiliary shafts. The synchronous belt assembly includes a first synchronous pulley and a third synchronous pulley mounted at both ends of the drive shaft, a second synchronous pulley mounted at one end of a first auxiliary shaft, a fourth synchronous pulley mounted at one end of a second auxiliary shaft, a first synchronous belt mounted between the first and second synchronous pulleys, and a second synchronous belt mounted between the third and fourth synchronous pulleys; the needle drive structure includes a left-right drive structure and a front-back drive structure, as well as a large needle mounted on the needle and adapted to the needle plate. Both the left-right drive structure and the front-back drive structure are driven by one end of the first auxiliary shaft.
[0005] Preferably, the drive shaft and the first auxiliary shaft are mounted parallel to each other on the platform via bearings, and the second auxiliary shaft is mounted on the bracket via bearings, with its extension line parallel to the drive shaft and the first auxiliary shaft. The bracket is equipped with a bearing seat on the side of the platform, and the bearing seat contains a bearing. The first auxiliary shaft passes through the platform and through the bearing.
[0006] Preferably, at least one of the first and second synchronous pulleys has no flange on one side, and at least one of the third and fourth synchronous pulleys has no flange on one side.
[0007] Preferably, the end of the first subshaft near the bracket is thickened, and a screw hole is located off-center on the plane of the thickened end.
[0008] In the above scheme, the left and right drive structure of the needle includes a needle core installed in the through hole of the bracket and connected to the needle, a needle puller installed on the needle core, and a connecting rod installed between the needle puller and the thick end plane of the first secondary shaft. The front and rear drive structure of the needle includes a third cam installed on the thick end of the first secondary shaft, levers with their two ends respectively in contact with the third cam and the needle puller, and a lever core fixed on the bracket.
[0009] Preferably, the connecting rod has universal joints at both ends, one end is fixed to the pin puller with screws, and the other end is fixed to the screw hole off-center on the thick end plane of the first secondary shaft with screws.
[0010] Preferably, the lever is fixed on a body below the bracket, the upper end of the lever has an adjustable screw, the end of the screw has a shaft, the bearing on the shaft is in contact with the plane of the needle puller, and the lower end of the lever is equipped with a bearing that is in contact with the outer ring of the third cam.
[0011] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:
[0012] 1. This utility model uses synchronous belt drive instead of traditional bevel gear drive, which reduces noise and wear when the machine is running at high speed, and extends the service life of the machine. The second auxiliary shaft is fixed above the bracket, which increases the space of the film passage hole and makes the sewing operation more convenient.
[0013] 2. In the synchronous belt drive structure, the synchronous belt pulley is installed at the end of the shaft and part of it adopts a design without a retaining edge, making it easier to disassemble and assemble the synchronous belt.
[0014] 3. The left-right drive structure and the front-back drive structure of the pin are both driven by the first secondary shaft, and the hook structure is driven by the second secondary shaft. This makes the overall structure simpler, avoids mutual interference during operation, reduces the failure rate, and makes maintenance more convenient. Attached Figure Description
[0015] Figure 1 It is an overall structural diagram.
[0016] Figure 2 This is a schematic diagram of a synchronous belt drive structure.
[0017] Figure 3 This is a schematic diagram of a pin-driven structure. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] like Figure 1-3As shown, a high-speed sewing machine includes: a platform 1, a bracket 2 mounted on the platform 1, a gear 5 mounted inside the platform 1, a central plate 3 mounted below the platform 1, a needle plate 4 mounted on the outer ring of the central plate 3, a synchronous belt drive structure mounted on the platform 1 and the bracket 2, a hook thread structure 25 mounted on the bracket 2 and driven by the synchronous belt drive structure, and a needle drive structure mounted below the bracket 2 and driven by the synchronous belt drive structure. The synchronous belt drive structure includes a drive shaft 7 and a first auxiliary shaft 8 mounted on the platform 1, a second auxiliary shaft 9 mounted on the bracket 2, and a synchronous belt assembly mounted between the drive shaft 7 and the first auxiliary shaft 8 and the second auxiliary shaft 9. The step belt assembly includes a first synchronous pulley 10 and a third synchronous pulley 13 mounted at both ends of the drive shaft 7, a second synchronous pulley 12 mounted at one end of the first auxiliary shaft 8, a fourth synchronous pulley 15 mounted at one end of the second auxiliary shaft 9, a first synchronous belt 11 mounted between the first synchronous pulley 10 and the second synchronous pulley 12, and a second synchronous belt 14 mounted between the third synchronous pulley 13 and the fourth synchronous pulley 15. The needle drive structure includes a left-right drive structure and a front-back drive structure, as well as a large needle 19 mounted on the needle 17 and adapted to the needle plate 4. Both the left-right drive structure and the front-back drive structure are driven by one end of the first auxiliary shaft 8. In this invention, when the pulley 6 rotates under external force, the drive shaft 7 rotates accordingly. Under the transmission action of the synchronous belt assembly, the first auxiliary shaft 8 and the second auxiliary shaft 9 rotate accordingly. The rotation of the first auxiliary shaft 8 drives the left-right swing and front-back movement of the needle 17, and the rotation of the second auxiliary shaft 9 drives the hook structure 25 to complete the hooking action.
[0020] In this embodiment, the drive shaft 7 and the first auxiliary shaft 8 are mounted parallel to each other on the carriage 1 via bearings. The second auxiliary shaft 9 is mounted on the bracket 2 via bearings, and its extension line is parallel to the drive shaft 7 and the first auxiliary shaft 8. The bracket 2 is equipped with a bearing seat 16 on the side near the carriage 1. The bearing seat 16 contains a bearing. The first auxiliary shaft 8 passes through the carriage 1 and through the bearing. This structure increases the space of the plate-passing hole.
[0021] In this embodiment, at least one of the first synchronous pulley 10 and the second synchronous pulley 12 has no side flange, and at least one of the third synchronous pulley 13 and the fourth synchronous pulley 15 has no side flange, making it easier to install and remove the synchronous belt.
[0022] In this embodiment, the first secondary shaft 8 is thickened at the end near the bracket 2, and there is a screw hole at the position of the thickened end plane off-center, which is used to fix one end of the connecting rod 21.
[0023] In this embodiment, the left-right drive structure of the needle 17 includes a needle core 18 installed in the through hole of the bracket 2 and connected to the needle 17, a needle puller 20 installed on the needle core 18, and a connecting rod 21 installed between the needle puller 20 and the thick end plane of the first sub-shaft 8. The front-back drive structure of the needle 17 includes a third cam 22 installed on the thick end of the first sub-shaft 8, a lever 23 with its two ends in contact with the third cam 22 and the needle puller 20 respectively, and a lever core 24 fixed to the bracket 2. When the first sub-shaft 8 rotates, the connecting rod 21 will have an up-down movement. This movement is transmitted to the needle core 18 through the needle puller 20, thereby causing the needle 17 to swing left and right. At the same time, as the first sub-shaft 8 rotates, the outer ring of the third cam 22 undulates, giving the lever 23 a front-back movement. The movement is transmitted to the needle core 18 through the lever 23 and the needle puller 20, thereby causing the needle 17 to move back and forth.
[0024] In this embodiment, the connecting rod 21 has universal joints at both ends. One end is fixed to the pin puller 20 with screws, and the other end is fixed to the screw hole off-center on the thick end plane of the first secondary shaft 8 with screws.
[0025] In this embodiment, the lever core 24 is fixed on a body below the bracket 2. The upper end of the lever 23 has an adjustable screw, and the end of the screw has a shaft. The bearing on the shaft contacts the plane of the needle puller 20. The lower end of the lever 23 is equipped with a bearing that contacts the outer ring of the third cam 22.
[0026] In summary, the above description is only a specific embodiment of this utility model. All equivalent modifications or alterations made to the structure, features and principles described in this utility model application should be included within the scope of this utility model patent.
Claims
1. A high speed stitcher comprising: The utility model relates to a needle hooking and threading machine, which comprises a machine bed (1), a support (2) mounted on the machine bed (1), a gear (5) mounted in the machine bed (1), a middle plate (3) mounted below the machine bed (1), a needle plate (4) mounted on the outer ring of the middle plate (3), a synchronous belt transmission structure mounted on the machine bed (1) and the support (2), a hooking and threading structure (25) mounted on the support (2) and driven by the synchronous belt transmission structure, and a needle foot driving structure mounted below the support (2) and driven by the synchronous belt transmission structure.
2. A high speed disc seamer according to claim 1 wherein: The main shaft (7) and the first auxiliary shaft (8) are parallelly mounted on the machine bed (1) through bearings, and the second auxiliary shaft (9) is mounted on the support (2) through a bearing, with its extension line being parallel to the main shaft (7) and the first auxiliary shaft (8).
3. A high speed disc seamer as claimed in claim 1, wherein: At least one of the first synchronous belt pulley (10) and the second synchronous belt pulley (12) has no blocking edge on one side, and at least one of the third synchronous belt pulley (13) and the fourth synchronous belt pulley (15) has no blocking edge on one side.
4. A high speed disc seamer according to claim 1 wherein: The end of the first auxiliary shaft (8) close to the support (2) is thickened, and the thickened end has a screw hole at a position deviated from the center of the plane.
5. A high speed disc seaming machine according to any one of claims 1 to 4 wherein: The left-right driving structure of the needle foot (17) comprises a needle foot core (18) mounted in a through hole of the support (2) and connected to the needle foot (17), a needle pulling device (20) mounted on the needle foot core (18), and a connecting rod (21) mounted between the needle pulling device (20) and the thickened end plane of the first auxiliary shaft (8), and the front-back driving structure of the needle foot (17) comprises a No. 3 cam (22) mounted on the thickened end of the first auxiliary shaft (8), a lever (23) having two ends respectively in contact with the No. 3 cam (22) and the needle pulling device (20), and a lever core (24) for fixing the lever (23) on the support (2).
6. A high speed disc seamer according to claim 5 wherein: The connecting rod (21) has a universal joint at each end, one end is fixed on the needle puller (20) by a screw, and the other end is fixed on the screw hole of the first countershaft (8) rough end plane deviated from the center.
7. A high speed disc seamer according to claim 5 wherein: The lever core (24) is fixed on a seat below the support (2), the upper end of the lever (23) has a screw rod which can adjust the front and back positions, the end of the screw rod has an axis, the bearing on the axis is in contact with the plane of the needle puller (20), and the lower end of the lever (23) is provided with a bearing in contact with the outer ring of the third cam (22).