A stitch guide type overlock machine

Abstract

The application discloses a line guiding type overlock machine and relates to the technical field of overlock machines. The line guiding type overlock machine comprises a sewing machine rack and an overlock mechanism arranged on the sewing machine rack, and the overlock mechanism is integrated with a cloth pricking mechanism, a cloth feeding mechanism and a cloth cutting mechanism. The line guiding type overlock machine is provided with an overlock and joint seam mechanism formed by a needle bar thread picking mechanism, a curved needle thread hooking mechanism and a lower cloth feeding mechanism. The cloth pricking mechanism, the upper curved needle mechanism, the lower curved needle mechanism, the cloth cutting mechanism and the cloth feeding mechanism are respectively controlled by separate eccentric wheels, so as to reduce mutual interference between the mechanisms, simplify the design and assembly difficulty, and adopt a quick-change type movable presser foot, a knob adjusting needle spacing and differential, and a rocker type reversible upper cutting knife cloth cutting mechanism. In addition, the appearance of the machine is improved according to the operation habit of people, so that the machine is more stable, the operation is more convenient, and the function is more complete.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of overlock machines, in particular to a line guiding type overlock machine. BACKGROUND

[0002] An overlock machine is an indispensable special equipment in garment processing, also known as a hemming machine, which is mainly used for the overlock processing of fabric edges, can effectively prevent the fabric from coming off the line and the edge from being scattered, and at the same time, can enhance the firmness of the seam. It has a wide range of applications, from natural fiber fabrics such as cotton, hemp, and silk to chemical fibers and knitted fabrics, and can be efficiently processed. It is particularly outstanding in knitted garment production and can adapt to the elasticity of the fabric. The stitches of the overlock machine are diverse, and the common ones are three-thread, four-thread, and five-thread overlock. The stitch density can be adjusted according to the fabric thickness and process requirements, which can not only achieve simple hemming effects, but also complete decorative overlock. Modern overlock machines are mostly driven by electricity, and some industrial models are equipped with automatic thread trimming and speed adjustment functions, which are convenient to operate and have high efficiency. It is not only an essential equipment for large garment factories, but also a practical tool for processing fabric edges for home sewing enthusiasts. Regular cleaning of thread ends and adding lubricating oil are required during daily use to ensure stable operation.

[0003] Patent application No. CN105177877A discloses an overlock sewing machine, which can switch between linkage state, retreat state and guide state, thereby improving the convenience of the overlock sewing machine. The overlock sewing machine has: an upper cutter that can freely move to a retreat position or a protruding position; an upper cutter driving portion; a linkage switching portion that switches between linkage state or release state; an upper cutter position switching portion that switches the configuration position of the upper cutter to the protruding position or the retreat position; and an operation portion that can be switched to a first mode, a second mode and a third mode. The first mode is that the linkage switching portion is in the linkage state, and the upper cutter position switching portion sets the configuration position of the upper cutter to the protruding position. The second mode is that the linkage switching portion is in the release state, and the upper cutter position switching portion sets the configuration position of the upper cutter to the protruding position. The third mode is that the linkage switching portion is in the release state, and the upper cutter position switching portion sets the configuration position of the upper cutter to the retreat position.

[0004] The above-mentioned patent can configure the upper cutter at a position suitable for the first mode by changing the cam portion to a position not engaged with the upper cutter position switching portion, but there are still other problems in the use of the overlock machine.

[0005] Currently, the popular overlock sewing machines on the market, geared towards the service industry and households, offer some convenience for overlocking and hemming garment fabrics. However, these machines suffer from several drawbacks. The straight needle mechanism uses a cross-shaped design without a balancing device, resulting in significant vibration and poor stability during operation. The looper transmission mechanism uses a shared cam mechanism for both upper and lower loopers, causing their hook paths to oscillate in an arc, leading to mutual interference and difficulty in adjustment during assembly, and also limiting the presser foot's lifting height. The fabric feeding mechanism employs a fixed presser foot, rocker arm feed, and eccentric wheel direct feed, resulting in uneven fabric feeding pressure. The stitch length adjustment is cumbersome due to the threaded fixing. Furthermore, the machines occupy a large space on the worktable, and the mechanism requires openings in the lower casing, leading to significant dust contamination and difficult cleaning, thus affecting the machine's lifespan. Finally, lubrication is done manually through an open panel, which is inconvenient. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a line-guided overlock sewing machine to solve the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a line-guided overlock sewing machine, comprising a sewing machine frame and an overlock mechanism mounted on the sewing machine frame, wherein the overlock mechanism integrates a fabric insertion mechanism, a fabric feeding mechanism, and a fabric cutting mechanism, and the sewing machine frame is further provided with:

[0008] The power unit that drives the overlock sewing mechanism, the upper shaft mechanism that is connected to the needle insertion mechanism, the main shaft mechanism that is linked to the upper shaft mechanism, the pulley installed at the end of the main shaft mechanism, the upper looper mechanism and the lower looper mechanism that control the sewing stitch respectively, the fabric feeding mechanism is connected to the stitch length and differential adjustment mechanism, and the sewing machine frame is provided with adjustment components and thread guide components on the side.

[0009] The main spindle mechanism is mounted on the sewing machine frame, and the main spindle mechanism drives the pulley to rotate via a power component connected to a belt.

[0010] The main shaft mechanism is connected to the upper shaft mechanism, the upper looper mechanism, the lower looper mechanism, the fabric feeding mechanism, and the fabric cutting mechanism, respectively.

[0011] The upper shaft mechanism is connected to the needle bar mechanism at its front end and serves as the thread take-up mechanism;

[0012] After the main spindle mechanism is turned, it drives the upper and lower bend needle mechanisms. The upper and lower bend needle mechanisms perform the function of hooking the line through the cam on the upper spindle mechanism.

[0013] The main shaft mechanism drives the fabric feeding mechanism, which in turn feeds the fabric through a cam on the main shaft mechanism in conjunction with a pressure bar mechanism mounted on the sewing machine frame. The main shaft mechanism also drives the fabric cutting mechanism, which in turn cuts the fabric through a cam on the main shaft mechanism.

[0014] The fabric feeding mechanism is connected to the stitch length and differential adjustment mechanism. By moving the adjustment components on the stitch length and differential adjustment mechanism, the angle of the sliding groove on the fabric feeding mechanism is changed to achieve the functions of stitch length and differential adjustment. The fixed cutter holder on the fabric cutting mechanism is positioned left and right by screws to achieve the required fabric cutting width.

[0015] The fabric piercing mechanism, upper bend needle mechanism, lower bend needle mechanism, fabric cutting mechanism, and fabric feeding mechanism are each controlled by a separate eccentric wheel to reduce mutual interference between the mechanisms and simplify the design and assembly.

[0016] The fabric feeding mechanism uses a quick-change movable presser foot and a toggle adjustment component to adjust the stitch length and differential. It also features a rocker-type flip-up upper cutter cutting mechanism.

[0017] In some embodiments, a cover plate is rotatably connected to the outer wall of the sewing machine frame, and a temporary storage box is fixedly connected to the front of the sewing machine frame.

[0018] In some embodiments, the back of the sewing machine frame is provided with heat dissipation holes, and a power socket is fixedly connected to the side of the sewing machine frame.

[0019] In some embodiments, a guide assembly is fixedly connected to the side of the sewing machine frame.

[0020] In some embodiments, the guiding component includes a fan fixedly connected to the side of the sewing machine frame, a connecting pipe fixedly connected to the top of the fan, an elastic tube fixedly connected to the top of the connecting pipe, and an airflow cross chamber fixedly connected to the outer wall of the elastic tube.

[0021] In some embodiments, a semi-circular plate is fixedly connected to the inner wall of the airflow chamber at the position of the elastic tube, and a horizontal tube is fixedly connected to the outer wall of the semi-circular plate. The airflow passing through the elastic tube will be blown out from the gap between the horizontal tube and the semi-circular plate and the elastic tube.

[0022] In some embodiments, a bracket is fixedly connected to the side of the sewing machine frame near the fan, a telescopic mechanism is fixedly connected to the outer wall of the bracket, a connecting block is movably connected to the top of the telescopic mechanism, a connecting rod is fixedly connected to the outer wall of the elastic tube, the connecting rod is inserted into the connecting block, and an airflow hole is provided on the outer wall of the sewing machine frame near the airflow compartment.

[0023] In some embodiments, a swing assembly is fixedly connected to the front of the sewing machine frame.

[0024] In some embodiments, the oscillating assembly includes a second bearing, which is fixedly connected to the front of the sewing machine frame. A motor is rotatably connected to the outer wall of the second bearing. One end of a long rod is fixedly connected to the outer wall of the motor via its own shaft. A collar is fixedly connected to the other end of the long rod, and the collar is fitted onto the outer wall of the second bearing.

[0025] In some embodiments, the motor is fixedly connected to two first bearings via a rotating shaft. Each of the first bearings has a cylinder rotatably connected to its outer wall, and each cylinder has a vent hole on its outer wall.

[0026] This invention provides a line-guided overlock sewing machine. It has the following advantages:

[0027] 1. This line-guided overlock sewing machine features improved designs for traditional overlock mechanisms (straight needle motion, looper transmission mechanism), feed mechanism, cutting mechanism, and lubrication methods: The balanced cross-shaped design used in the straight needle motion mechanism effectively improves the machine's stability during operation; the upper and lower loopers in the looper transmission mechanism are driven by their respective cam mechanisms, simplifying assembly and adjustment and effectively increasing the presser foot's lifting height. Adding a double-thread looper table to the L-axis end of the upper looper extends the sewing capabilities to double-thread sewing; the feed mechanism uses a quick-change movable presser foot, with its transmission employing a planar four-bar linkage, and the stitch length is adjusted using a lever-type angle adjustment mechanism; the rocker-type flip-up upper cutter cutting mechanism effectively increases the usable space of the worktable, improves the machine's internal sealing performance, and allows for easy flipping of the upper cutter when the cutting function is not in use.

[0028] 2. This line-guided overlock sewing machine employs a stitch bar thread take-up, looper thread hook, and bottom feed mechanism for overlock and continuous sewing. The fabric insertion mechanism, upper looper mechanism, lower looper mechanism, fabric cutting mechanism, and fabric feeding mechanism are each controlled by an individual eccentric wheel to reduce mutual interference between mechanisms and simplify design and assembly. The fabric feeding mechanism uses a quick-change movable presser foot, and the stitch length and differential can be adjusted by a toggle knob. A rocker-type flip-up upper cutter is used for the fabric cutting mechanism. The machine's appearance has been improved to better suit human operating habits, resulting in smoother operation, easier operation, and more comprehensive functions. Adding a double-thread looper table to the L-axis end of the upper looper extends the sewing capabilities to double-thread sewing.

[0029] 3. This line-guided overlock sewing machine uses a fan to generate airflow, which is then distributed through an elastic tube to the horizontal tube and airflow chamber. The horizontal tube directly cools internal moving parts (such as the spindle mechanism), reducing heat conduction. The airflow in the airflow chamber acts on the sewing area through airflow holes, using the fluid adsorption effect to stabilize the position of the textile material and simultaneously reduce heat accumulation in the sewing area, preventing thin fabrics from shrinking or deforming due to high temperatures. The telescopic mechanism drives the connecting block to twist the elastic tube, making the air outlet direction of the horizontal tube adjustable. This achieves directional heat dissipation for different components within the sewing machine frame.

[0030] 4. This line-guided overlock sewing machine allows for quick adjustment of the cutting width by manually adjusting the stitch length. This reduces costs, making it suitable for home use and easing the burden on families. Stitch length and differential adjustment are achieved simply by tossing a button; the operation is simple and convenient, making it suitable for home use. It improves the efficiency of home sewing machines, demonstrating good practical application results and facilitating widespread adoption. Independent eccentric wheels are provided for the needle insertion mechanism, upper looper mechanism, lower looper mechanism, cutting mechanism, and feeding mechanism, effectively isolating mechanical interference during their movement. This significantly reduces design complexity and assembly difficulty.

[0031] 5. This line-guided overlock sewing machine uses a oscillating component driven by a motor to periodically oscillate a cylinder, causing the textile material placed on it to shift periodically. This action breaks the static accumulation of material, promotes air circulation, and accelerates heat dissipation in the sewing area. It is especially suitable for sewing thick, multi-layered fabrics, preventing overheating and hardening or stitch distortion caused by localized congestion.

[0032] 6. This line-guided overlock sewing machine utilizes a dual thermal management mechanism achieved through the cooperation of the guiding component and the oscillating component:

[0033] The airflow adsorption effect of the guide component (at the airflow hole) stabilizes the material position and prevents displacement during oscillation;

[0034] The periodic motion of the oscillating component increases the contact area between the material and the airflow, improving the uniformity of heat dissipation.

[0035] The directional airflow in the horizontal tube covers a larger heat dissipation area as the material oscillates.

[0036] The two work together to significantly reduce the overall temperature of textile materials while ensuring operational stability, fundamentally reducing sewing defects caused by heat deformation. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the axial three-dimensional structure of Embodiment 1 of the present invention;

[0038] Figure 2 This is a schematic diagram of the rear three-dimensional structure of Embodiment 1 of the present invention;

[0039] Figure 3 This is a bottom-view three-dimensional structural diagram of Embodiment 1 of the present invention;

[0040] Figure 4 This is a frontal cross-sectional view of an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the rear side of the internal cross-section of Embodiment 1 of the present invention;

[0042] Figure 6 This is a bottom sectional view of the interior of Embodiment 1 of the present invention;

[0043] Figure 7 This is a schematic diagram of the axial three-dimensional structure of Embodiment 2 of the present invention;

[0044] Figure 8 This is a top-view three-dimensional structural diagram of Embodiment 2 of the present invention;

[0045] Figure 9 This is Embodiment 2 of the present invention. Figure 8 Enlarged structural diagram of section B in the middle;

[0046] Figure 10 This is a partial structural diagram of the fan in Embodiment 2 of the present invention;

[0047] Figure 11 This is Embodiment 2 of the present invention. Figure 10 Schematic diagram of partial cross-section of the structure;

[0048] Figure 12 This is Embodiment 3 of the present invention. Figure 7 Enlarged structural diagram of section A in the middle;

[0049] Figure 13 This is a partial structural diagram of the swing component in Embodiment 3 of the present invention.

[0050] In the diagram: 1. Sewing machine frame; 2. Overlock mechanism; 21. Press bar mechanism; 22. Needle bar mechanism; 23. Fabric feeding mechanism; 24. Stitch length and differential adjustment mechanism; 25. Fabric cutting mechanism; 26. Upper spindle mechanism; 27. Main spindle mechanism; 28. Pulley; 29. ​​Upper looper mechanism; 210. Lower looper mechanism; 3. Temporary storage box; 4. Adjustment components; 5. Thread guide components; 6. Cover plate; 7. Guide assembly; 71. Fan; 72. Connecting pipe 73. Elastic tube; 74. Horizontal tube; 75. Semicircular plate; 76. Support; 77. Telescopic mechanism; 78. Connecting rod; 79. Connecting block; 710. Airflow chamber; 711. Airflow hole; 8. Swing assembly; 81. Motor; 82. First bearing; 83. Cylinder; 84. Ventilation hole; 85. Second bearing; 86. Collar; 87. Long rod; 9. Needle-punching mechanism; 10. Heat dissipation hole; 11. Power socket; 12. Power component. Detailed Implementation

[0051] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0052] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0053] Example 1, please refer to Figures 1-6 This invention provides a technical solution: a line-guided overlock sewing machine, comprising a sewing machine frame 1 and an overlock mechanism 2 disposed on the sewing machine frame 1. The overlock mechanism 2 integrates a fabric insertion mechanism 9, a fabric feeding mechanism 23, and a fabric cutting mechanism 25. The sewing machine frame 1 is also provided with:

[0054] The sewing machine frame 1 has a power component 12 that drives the overlock sewing mechanism 2, an upper shaft mechanism 26 that is connected to the needle insertion mechanism 9, a main shaft mechanism 27 that is linked to the upper shaft mechanism 26, a pulley 28 installed at the end of the main shaft mechanism 27, an upper looper mechanism 29 and a lower looper mechanism 210 that control the sewing stitch respectively, a fabric feeding mechanism 23 that is connected to a stitch length and a differential adjustment mechanism 24, and an adjustment component 4 and a thread guide component 5 on the side of the sewing machine frame 1.

[0055] The main shaft mechanism 27 is mounted on the sewing machine frame 1, and the main shaft mechanism 27 drives the pulley 28 to rotate via a belt connected to the power component 12.

[0056] The main shaft mechanism 27 is connected to the upper shaft mechanism 26, the upper looper mechanism 29, the lower looper mechanism 210, the fabric feeding mechanism 23, and the fabric cutting mechanism 25, respectively.

[0057] The upper shaft mechanism 26 is connected to the needle bar mechanism 22 at its front end and serves as the thread take-up mechanism;

[0058] After the main spindle mechanism 27 is turned, it drives the upper bend needle mechanism 29 and the lower bend needle mechanism 210. The upper bend needle mechanism 29 and the lower bend needle mechanism 210 perform the function of hooking the line through the cam on the upper spindle mechanism 26.

[0059] The main shaft mechanism 27 drives the fabric feeding mechanism 23. The fabric feeding mechanism 23 performs the function of feeding fabric through the cam on the main shaft mechanism 27 and the pressure bar mechanism 21 mounted on the sewing machine frame 1. The main shaft mechanism 27 drives the fabric cutting mechanism 25. The fabric cutting mechanism 25 performs the function of cutting fabric through the cam on the main shaft mechanism 27.

[0060] The fabric feeding mechanism 23 is connected to the needle pitch and differential adjustment mechanism 24. The needle pitch and differential adjustment functions are achieved by adjusting the adjustment component 4 on the needle pitch and differential adjustment mechanism 24 and changing the angle of the sliding groove on the fabric feeding mechanism 23. The fixed cutter holder on the fabric cutting mechanism 25 is positioned by screws to meet the requirements of the fabric cutting width.

[0061] The piercing mechanism 9, the upper bending needle mechanism 29, the lower bending needle mechanism 210, the cutting mechanism 25, and the feeding mechanism 23 are each controlled by a separate eccentric wheel to reduce mutual interference between the mechanisms and simplify the design and assembly.

[0062] The fabric feeding mechanism 23 adopts a quick-change movable presser foot and a toggle adjustment component 4 to adjust the stitch length and differential. The fabric cutting mechanism 25 adopts a rocker-type flip-up upper cutter.

[0063] A cover plate 6 is rotatably connected to the outer wall of the sewing machine frame 1, and a temporary storage box 3 is fixedly connected to the front of the sewing machine frame 1.

[0064] The sewing machine frame 1 has a heat dissipation hole 10 on the back and a power socket 11 fixedly connected to the side of the sewing machine frame 1.

[0065] When in use, the stitch length can be adjusted simply by rotating the adjustment component 4. The operation is simple and convenient, making it suitable for home users and improving the working efficiency of household sewing machines.

[0066] Example 2, please refer to Figures 1-11 Based on Embodiment 1, the present invention provides a technical solution:

[0067] A line-guided overlock sewing machine includes a sewing machine frame 1 and an overlock sewing mechanism 2 mounted on the sewing machine frame 1. The overlock sewing mechanism 2 integrates a fabric insertion mechanism 9, a fabric feeding mechanism 23, and a fabric cutting mechanism 25. The sewing machine frame 1 is also equipped with:

[0068] The sewing machine frame 1 has a power component 12 that drives the overlock sewing mechanism 2, an upper shaft mechanism 26 that is connected to the needle insertion mechanism 9, a main shaft mechanism 27 that is linked to the upper shaft mechanism 26, a pulley 28 installed at the end of the main shaft mechanism 27, an upper looper mechanism 29 and a lower looper mechanism 210 that control the sewing stitch respectively, a fabric feeding mechanism 23 that is connected to a stitch length and a differential adjustment mechanism 24, and an adjustment component 4 and a thread guide component 5 on the side of the sewing machine frame 1.

[0069] The main shaft mechanism 27 is mounted on the sewing machine frame 1, and the main shaft mechanism 27 drives the pulley 28 to rotate via a belt connected to the power component 12.

[0070] The main shaft mechanism 27 is connected to the upper shaft mechanism 26, the upper looper mechanism 29, the lower looper mechanism 210, the fabric feeding mechanism 23, and the fabric cutting mechanism 25, respectively.

[0071] The upper shaft mechanism 26 is connected to the needle bar mechanism 22 at its front end and serves as the thread take-up mechanism;

[0072] After the main spindle mechanism 27 is turned, it drives the upper bend needle mechanism 29 and the lower bend needle mechanism 210. The upper bend needle mechanism 29 and the lower bend needle mechanism 210 perform the function of hooking the line through the cam on the upper spindle mechanism 26.

[0073] The main shaft mechanism 27 drives the fabric feeding mechanism 23. The fabric feeding mechanism 23 performs the function of feeding fabric through the cam on the main shaft mechanism 27 and the pressure bar mechanism 21 mounted on the sewing machine frame 1. The main shaft mechanism 27 drives the fabric cutting mechanism 25. The fabric cutting mechanism 25 performs the function of cutting fabric through the cam on the main shaft mechanism 27.

[0074] The fabric feeding mechanism 23 is connected to the needle pitch and differential adjustment mechanism 24. The needle pitch and differential adjustment functions are achieved by adjusting the adjustment component 4 on the needle pitch and differential adjustment mechanism 24 and changing the angle of the sliding groove on the fabric feeding mechanism 23. The fixed cutter holder on the fabric cutting mechanism 25 is positioned by screws to meet the requirements of the fabric cutting width.

[0075] The piercing mechanism 9, the upper bending needle mechanism 29, the lower bending needle mechanism 210, the cutting mechanism 25, and the feeding mechanism 23 are each controlled by a separate eccentric wheel to reduce mutual interference between the mechanisms and simplify the design and assembly.

[0076] The fabric feeding mechanism 23 adopts a quick-change movable presser foot and a toggle adjustment component 4 to adjust the stitch length and differential. The fabric cutting mechanism 25 adopts a rocker-type flip-up upper cutter.

[0077] A cover plate 6 is rotatably connected to the outer wall of the sewing machine frame 1, and a temporary storage box 3 is fixedly connected to the front of the sewing machine frame 1.

[0078] The sewing machine frame 1 has a heat dissipation hole 10 on the back and a power socket 11 fixedly connected to the side of the sewing machine frame 1.

[0079] When in use, the stitch length can be adjusted simply by rotating the adjustment component 4. The operation is simple and convenient, making it suitable for home users and improving the working efficiency of household sewing machines.

[0080] A guide assembly 7 is fixedly connected to the side of the sewing machine frame 1;

[0081] The guide component 7 and the oscillating component 8 work together to form a dual thermal management mechanism:

[0082] The airflow adsorption effect of the guide component 7 stabilizes the material position at the airflow hole 711, preventing displacement during the swing process;

[0083] The periodic movement of the oscillating component 8 increases the contact area between the material and the airflow, improving the uniformity of heat dissipation.

[0084] The directional airflow of the horizontal tube 74 covers a larger heat dissipation area as the material oscillates.

[0085] The two work together to significantly reduce the overall temperature of textile materials while ensuring operational stability, fundamentally reducing sewing defects caused by heat deformation.

[0086] The guide assembly 7 includes a fan 71, which is fixedly connected to the side of the sewing machine frame 1. A connecting pipe 72 is fixedly connected to the top of the fan 71, and an elastic pipe 73 is fixedly connected to the top of the connecting pipe 72. An airflow cross chamber 710 is fixedly connected to the outer wall of the elastic pipe 73.

[0087] A semi-circular plate 75 is fixedly connected to the inner wall of the airflow transverse chamber 710 at the position of the elastic tube 73. A horizontal tube 74 is fixedly connected to the outer wall of the semi-circular plate 75. The airflow passing through the elastic tube 73 will be blown out from the gap between the horizontal tube 74 and the semi-circular plate 75 and the elastic tube 73.

[0088] A bracket 76 is fixedly connected to the side of the sewing machine frame 1 near the fan 71. A telescopic mechanism 77 is fixedly connected to the outer wall of the bracket 76. A connecting block 79 is movably connected to the top of the telescopic mechanism 77. A connecting rod 78 is fixedly connected to the outer wall of the elastic tube 73. The connecting rod 78 is inserted into the connecting block 79. An airflow hole 711 is opened on the outer wall of the sewing machine frame 1 near the airflow cross chamber 710.

[0089] Airflow hole 711 is located on the sewing machine frame 1 near the needle-punching mechanism 9. Airflow chamber 710 is installed on the side of the sewing machine frame 1 and is slightly lower than airflow hole 711. Airflow from airflow chamber 710 can blow into the sewing machine frame 1. When the fan 71 is powered on, it is connected to airflow chamber 710 through connecting pipe 72 and elastic pipe 73. The airflow passes through the bottom of airflow hole 711 in the sewing machine frame 1. According to Bernoulli's principle, the greater the airflow velocity, the lower the pressure. Therefore, the airflow velocity at the bottom of airflow hole 711 is greater than that at the top of airflow hole 711. As a result, the pressure at the bottom of airflow hole 711 is low. Under pressure, the textile material is squeezed to adhere to airflow hole 711, which plays a role in stabilizing the textile material. Moreover, the flow of airflow also guides the flow of heat, reducing the deformation of textile material caused by overheating.

[0090] The horizontal tube 74 is installed in the elastic tube 73 through the semi-circular plate 75. There is a gap between the semi-circular plate 75 and the elastic tube 73, so airflow will blow out from the gap of the semi-circular plate 75 into the airflow chamber 710. Some airflow will also blow out from the horizontal tube 74. The horizontal tube 74 blows directly onto multiple components inside the sewing machine frame 1, which will accelerate the heat dissipation of the components and reduce the heat generated by the components during operation, thus reducing the heat of the textile material. When the telescopic mechanism 77 is powered on, it will drive the connecting block 79 to move up and down. The connecting rod 78 is inserted into the connecting block 79. The connecting block 79 drives the connecting rod 78 to move, which in turn causes the elastic tube 73 to twist, causing the horizontal tube 74 to tilt. The tilting of the horizontal tube 74 will change the direction of the airflow, allowing the horizontal tube 74 to blow to more positions. The airflow that enters the sewing machine frame 1 through the airflow chamber 710 will be discharged from the heat dissipation hole 10.

[0091] Example 3, please refer to Figures 1-13 Based on Embodiment 1 and Embodiment 2, the present invention provides a technical solution:

[0092] A line-guided overlock sewing machine includes a sewing machine frame 1 and an overlock sewing mechanism 2 mounted on the sewing machine frame 1. The overlock sewing mechanism 2 integrates a fabric insertion mechanism 9, a fabric feeding mechanism 23, and a fabric cutting mechanism 25. The sewing machine frame 1 is also equipped with:

[0093] The sewing machine frame 1 has a power component 12 that drives the overlock sewing mechanism 2, an upper shaft mechanism 26 that is connected to the needle insertion mechanism 9, a main shaft mechanism 27 that is linked to the upper shaft mechanism 26, a pulley 28 installed at the end of the main shaft mechanism 27, an upper looper mechanism 29 and a lower looper mechanism 210 that control the sewing stitch respectively, a fabric feeding mechanism 23 that is connected to a stitch length and a differential adjustment mechanism 24, and an adjustment component 4 and a thread guide component 5 on the side of the sewing machine frame 1.

[0094] The main shaft mechanism 27 is mounted on the sewing machine frame 1, and the main shaft mechanism 27 drives the pulley 28 to rotate via a belt connected to the power component 12.

[0095] The main shaft mechanism 27 is connected to the upper shaft mechanism 26, the upper looper mechanism 29, the lower looper mechanism 210, the fabric feeding mechanism 23, and the fabric cutting mechanism 25, respectively.

[0096] The upper shaft mechanism 26 is connected to the needle bar mechanism 22 at its front end and serves as the thread take-up mechanism;

[0097] After the main spindle mechanism 27 is turned, it drives the upper bend needle mechanism 29 and the lower bend needle mechanism 210. The upper bend needle mechanism 29 and the lower bend needle mechanism 210 perform the function of hooking the line through the cam on the upper spindle mechanism 26.

[0098] The main shaft mechanism 27 drives the fabric feeding mechanism 23. The fabric feeding mechanism 23 performs the function of feeding fabric through the cam on the main shaft mechanism 27 and the pressure bar mechanism 21 mounted on the sewing machine frame 1. The main shaft mechanism 27 drives the fabric cutting mechanism 25. The fabric cutting mechanism 25 performs the function of cutting fabric through the cam on the main shaft mechanism 27.

[0099] The fabric feeding mechanism 23 is connected to the needle pitch and differential adjustment mechanism 24. The needle pitch and differential adjustment functions are achieved by adjusting the adjustment component 4 on the needle pitch and differential adjustment mechanism 24 and changing the angle of the sliding groove on the fabric feeding mechanism 23. The fixed cutter holder on the fabric cutting mechanism 25 is positioned by screws to meet the requirements of the fabric cutting width.

[0100] The piercing mechanism 9, the upper bending needle mechanism 29, the lower bending needle mechanism 210, the cutting mechanism 25, and the feeding mechanism 23 are each controlled by a separate eccentric wheel to reduce mutual interference between the mechanisms and simplify the design and assembly.

[0101] The fabric feeding mechanism 23 adopts a quick-change movable presser foot and a toggle adjustment component 4 to adjust the stitch length and differential. The fabric cutting mechanism 25 adopts a rocker-type flip-up upper cutter.

[0102] A cover plate 6 is rotatably connected to the outer wall of the sewing machine frame 1, and a temporary storage box 3 is fixedly connected to the front of the sewing machine frame 1.

[0103] The sewing machine frame 1 has a heat dissipation hole 10 on the back and a power socket 11 fixedly connected to the side of the sewing machine frame 1.

[0104] When in use, the stitch length can be adjusted simply by rotating the adjustment component 4. The operation is simple and convenient, making it suitable for home users and improving the working efficiency of household sewing machines.

[0105] The front of the sewing machine frame 1 is fixedly connected to a swing assembly 8.

[0106] The swing assembly 8 includes a second bearing 85, which is fixedly connected to the front of the sewing machine frame 1. A motor 81 is rotatably connected to the outer wall of the second bearing 85. One end of a long rod 87 is fixedly connected to the outer wall of the motor 81 through its own shaft. The other end of the long rod 87 is fixedly connected to a collar 86, which is sleeved on the outer wall of the second bearing 85.

[0107] The motor 81 is fixedly connected to two first bearings 82 via a rotating shaft. The outer wall of each first bearing 82 is rotatably connected to a cylinder 83, and the outer wall of each cylinder 83 is provided with a vent hole 84.

[0108] The swing assembly 8 is located on the front of the sewing machine frame 1. First, the textile material is placed between two cylinders 83. The cylinders 83 are provided with ventilation holes 84, which allows air to pass through. The motor 81 is equipped with control elements. It is pre-set that the motor 81 drives the first bearing 82 to rotate 10 degrees clockwise and then 10 degrees counterclockwise, repeating the cycle. When the motor 81 is powered on, it drives the two cylinders 83 to swing. The swing of the textile material reduces its accumulation and accelerates the dissipation of heat. The long rod 87 is also driven by the motor 81 to rotate slightly, and its other end is fitted onto the second bearing 85 through a collar 86. The motor 81 drives the cylinders 83 to swing through the long rod 87, which causes a slight change in the position of the motor 81 and the cylinders 83 as a whole, further reducing the accumulation of textile material.

[0109] The power unit 12 drives the pulley 28 at the end of the main shaft mechanism 27 via a belt to rotate the main shaft. The main shaft mechanism 27 controls the needle insertion mechanism 9, the upper looper mechanism 29, the lower looper mechanism 210, the fabric feeding mechanism 23, and the fabric cutting mechanism 25 through independent eccentric wheels to reduce interference between mechanisms. The main shaft mechanism 27, in conjunction with the upper shaft mechanism 26, drives the needle bar mechanism 22 to complete the needle insertion and realize the thread take-up function. At the same time, it drives the upper looper mechanism 29 and the lower looper mechanism 210 to complete the thread hooking action through the cam of the upper shaft mechanism 26. The main shaft cam drives the fabric feeding mechanism 23 to cooperate with the pressure rod mechanism 21 to realize the fabric feeding. The needle length and differential adjustment are adjusted by changing the angle of the sliding groove of the needle pitch and differential adjustment mechanism 24. The main shaft cam synchronously drives the fabric cutting mechanism 25 to perform edge trimming. Its fixed cutter frame controls the fabric cutting width by left and right positioning with screws. In the auxiliary system, the fan 71 of the guiding component 7 generates airflow, which is then split through the connecting pipe 72 and the elastic pipe 73: part of the airflow acts on the sewing area from the airflow transverse chamber 710 through the gap of the semi-circular plate 75 and the airflow hole 711, using the Bernoulli effect to adsorb and stabilize the textile material; the other part blows directly onto the internal components for heat dissipation through the transverse pipe 74. The telescopic mechanism 77 adjusts the airflow direction of the transverse pipe 74 by twisting the elastic pipe 73 through the connecting block 79 to expand the heat dissipation coverage. The motor 81 of the swing component 8 drives the cylinder 83 to periodically swing forward and backward ±10°, causing the textile material to shift and avoid accumulation, which, together with the airflow system of the guiding component 7, accelerates heat dissipation and reduces thermal deformation.

[0110] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A line-guided overlock sewing machine, comprising a sewing machine frame (1) and an overlock sewing mechanism (2) disposed on the sewing machine frame (1), characterized in that: The overlock sewing mechanism (2) integrates a fabric insertion mechanism (9), a fabric feeding mechanism (23), and a fabric cutting mechanism (25). The sewing machine frame (1) is also equipped with: The power component (12) driving the overlock sewing mechanism (2), the upper shaft mechanism (26) connected to the needle insertion mechanism (9), the main shaft mechanism (27) linked to the upper shaft mechanism (26), the pulley (28) installed at the end of the main shaft mechanism (27), the upper looper mechanism (29) and the lower looper mechanism (210) controlling the sewing stitch respectively, the fabric feeding mechanism (23) is connected to the stitch length and differential adjustment mechanism (24), and the sewing machine frame (1) is provided with an adjustment component (4) and a thread guide component (5) on the side. The main shaft mechanism (27) is mounted on the sewing machine frame (1). The main shaft mechanism (27) drives the pulley (28) to rotate via a belt connected to the power component (12). The main shaft mechanism (27) is connected to the upper shaft mechanism (26), the upper looper mechanism (29), the lower looper mechanism (210), the fabric feeding mechanism (23), and the fabric cutting mechanism (25). The upper shaft mechanism (26) is connected to the needle bar mechanism (22) at the front end and serves as the thread take-up mechanism; After the main spindle mechanism (27) is turned, it drives the upper bend needle mechanism (29) and the lower bend needle mechanism (210). The upper bend needle mechanism (29) and the lower bend needle mechanism (210) perform the function of hooking the line through the cam on the upper spindle mechanism (26). The main shaft mechanism (27) drives the fabric feeding mechanism (23). The fabric feeding mechanism (23) feeds the fabric through the cam on the main shaft mechanism (27) and the pressure rod mechanism (21) mounted on the sewing machine frame (1). A guide assembly (7) is fixedly connected to the side of the sewing machine frame (1). The guide assembly (7) includes a fan (71). The fan (71) is fixedly connected to the side of the sewing machine frame (1). A connecting pipe (72) is fixedly connected to the top of the fan (71). An elastic tube (73) is fixedly connected to the top of the connecting pipe (72). An airflow chamber (710) is fixedly connected to the outer wall of the elastic tube (73). The inner wall of the airflow chamber (710) is fixedly connected to the position of the elastic tube (73). There is a semi-circular plate (75), and a horizontal tube (74) is fixedly connected to the outer wall of the semi-circular plate (75). The airflow passing through the elastic tube (73) will be blown out from the gap between the horizontal tube (74) and the semi-circular plate (75) and the elastic tube (73). A bracket (76) is fixedly connected to the side of the sewing machine frame (1) near the fan (71). A telescopic mechanism (77) is fixedly connected to the outer wall of the bracket (76). A connecting block (79) is movably connected to the top of the telescopic mechanism (77). A connecting rod (78) is fixedly connected to the outer wall of the elastic tube (73). The connecting rod (78) is inserted into the connecting block (79). An airflow hole (711) is opened on the outer wall of the sewing machine frame (1) near the airflow chamber (710).

2. The line-guided overlock sewing machine according to claim 1, characterized in that: The main shaft mechanism (27) drives the fabric cutting mechanism (25), and the fabric cutting mechanism (25) performs the function of cutting fabric through the cam on the main shaft mechanism (27); The fabric feeding mechanism (23) is connected to the needle pitch and differential adjustment mechanism (24). By moving the adjustment component (4) on the needle pitch and differential adjustment mechanism (24), the angle of the sliding groove on the fabric feeding mechanism (23) is changed to achieve the function of adjusting the needle pitch and differential adjustment. The fixed cutter frame on the fabric cutting mechanism (25) is positioned by the left and right screws to achieve the required fabric cutting width. The needle insertion mechanism (9), the upper bend needle mechanism (29), the lower bend needle mechanism (210), the fabric cutting mechanism (25), and the fabric feeding mechanism (23) are each controlled by a separate eccentric wheel. The fabric feeding mechanism (23) adopts a quick-change movable presser foot and a toggle adjustment component (4) to adjust the stitch length and differential. It adopts a rocker-type flip-up upper cutter cutting mechanism (25). The outer wall of the sewing machine frame (1) is rotatably connected to a cover plate (6). The front of the sewing machine frame (1) is fixedly connected to a temporary storage box (3).

3. The line-guided overlock sewing machine according to claim 2, characterized in that: The sewing machine frame (1) has a heat dissipation hole (10) on the back and a power socket (11) fixedly connected to the side of the sewing machine frame (1).

4. The line-guided overlock sewing machine according to claim 1, characterized in that: The front of the sewing machine frame (1) is fixedly connected to a swing assembly (8).

5. A line-guided overlock sewing machine according to claim 4, characterized in that: The swing assembly (8) includes a second bearing (85), which is fixedly connected to the front of the sewing machine frame (1). A motor (81) is rotatably connected to the outer wall of the second bearing (85). One end of a long rod (87) is fixedly connected to the outer wall of the motor (81) through its own rotating shaft. The other end of the long rod (87) is fixedly connected to a collar (86), which is sleeved on the outer wall of the second bearing (85).

6. A line-guided overlock sewing machine according to claim 5, characterized in that: The motor (81) is fixedly connected to two first bearings (82) via a rotating shaft. The outer walls of the first bearings (82) are rotatably connected to cylinders (83), and the outer walls of the cylinders (83) are provided with ventilation holes (84).

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