Electrically controlled pattern sewing machine needle rack swing transmission

Abstract

A kind of electric control pattern sewing machine needle frame swing transmission belongs to sewing machine technical field.It includes: inside hollow head, fixedly installed in the lower part of head base, and main shaft needle bar unit, latch needle drive unit, left winding hook component, right line hook component, upper feeding system and lower feeding system;The main motor of main shaft needle bar unit drives driving power shaft, drives needle bar and needle up and down reciprocating motion;The lower main shaft of latch needle drive unit is driven with driving power shaft, drives latch needle to do front and back and up and down compound motion;Left winding hook component and right line hook component are driven by driving power shaft, reciprocate around needle and cooperate with winding knot;Upper feeding system and lower feeding system realize the pattern feeding of sewing material in cooperation.Advantages: through electric control, improve stitch control precision, modular design structure is compact, convenient to operate, it is favorable to complex stitch and large size sewing material sewing, and greatly improve sewing precision and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machinery technology, specifically relating to an electrically controlled needle holder swing transmission device for a pattern sewing machine. Background Technology

[0002] In the field of sewing machinery, shell-pattern sewing machines are widely used in shoe upper processing and clothing decoration sewing because they can sew seam-shaped stitches. Currently, most shell-pattern sewing machines on the market use a double-cam design for their core latch drive structure. This traditional transmission design controls the movement of the lower latch needle through the rotation of the double cams, enabling the lower latch needle to perform compound movements in both the up-down and back-forward directions, ultimately forming a ">" shaped trajectory, providing the basic motion conditions for the formation of seam-shaped stitches.

[0003] However, this type of structure system based on mechanical cams and gear transmission has revealed many insurmountable defects and shortcomings in practical applications, seriously affecting the flexibility, adaptability, and sewing quality of the sewing operation. Specifically: First, the existing double-cam structure of the shell sewing machine, based on the sewing operator's visual direction, is installed on the right side of the needle plate, and the overall height of the double-cam structure is significantly higher than the needle plate surface. This structural layout prevents the formation of a flat, continuous operating platform around the needle plate. When sewing workpieces such as shoe uppers that require rotating around the edge of the fabric, the fabric cannot move smoothly around the needle plate, greatly limiting the applicability of the sewing operation and failing to meet the sewing needs of complex-shaped fabrics. Second, in the actual sewing process, there are significant differences in the material (such as cotton, leather, and synthetic fibers) and thickness of the fabric. Different fabrics have different requirements for the travel of the latch needle. For example, thicker leather fabrics require a larger travel of the latch needle to ensure thread penetration and secure knotting, while thinner cotton fabrics require a smaller travel to avoid fabric damage. However, the existing shell-shaped sewing machine's latch needle travel is determined by the fixed profile dimensions of the double cams, making it impossible to adjust according to the actual characteristics of the fabric. The fixed latch needle travel results in poor adaptability to different types of fabric, easily leading to problems such as weak stitches and fabric damage. Secondly, the pattern adjustment of existing shell-shaped sewing machines relies on replacing gear sets, which typically have several sets with different transmission ratios, each corresponding to different pattern parameters. When switching the type of shell-shaped pattern, the operator must first stop the machine, disassemble the existing gear set, and then install the gear set corresponding to the target pattern. This entire replacement process is cumbersome and time-consuming, not only affecting sewing efficiency but also requiring additional gear sets, increasing equipment operating costs and maintenance difficulty. Finally, since the thread stop hook is a key component in the shell-shaped sewing machine used to work with the latch needle to achieve thread wrapping and knotting, ensuring stitch integrity, the existing shell-shaped sewing machine's thread stop hook has a fixed installation position, making it impossible to adjust its position according to changes in the sewing pattern, fabric thickness, and material differences. In actual sewing, the fixed-position thread stop hook is difficult to maintain the optimal matching position with the tongue needle and the machine needle. It is easy for the thread to be stopped in time or the position of the thread stop to be deviated, which will lead to missed stitches, resulting in quality problems such as broken stitches and loose stitches, and reducing the pass rate of sewn products. In summary, the existing needle holder swing transmission and related supporting structures of shell-pattern sewing machines have significant shortcomings in terms of operational flexibility, fabric adaptability, pattern switching efficiency, and sewing quality assurance. They fail to meet the current sewing industry's demand for efficient, flexible, and high-quality sewing equipment, necessitating urgent structural improvement and optimization. Therefore, the applicant has developed a beneficial design, and the technical solution described below arose from this context. Utility Model Content

[0004] The objective of this invention is to provide a compact, stable, reliable, and high-quality electrically controlled needle holder swing transmission device for pattern sewing machines. This device facilitates precise control of pattern stitches through electric control and high-precision adjustment, significantly improving sewing accuracy and efficiency. It also enables compact and coordinated operation of components through modular design, facilitating the sewing of complex stitches and large-sized fabrics. Furthermore, it optimizes the structure to achieve efficient stitch density and aesthetics through combined sewing of main and auxiliary threads.

[0005] The present invention accomplishes its objective as follows: An electrically controlled needle holder oscillation transmission device for a pattern sewing machine includes: a machine head, the machine head being hollow and forming a machine head cavity; a machine base, the machine base being fixedly installed below the machine head; a main shaft needle bar unit, including a main motor, a drive shaft, and a needle bar drivenly connected to the front end of the drive shaft, the main motor driving the drive shaft to rotate, and the drive shaft being able to drive the needle bar to reciprocate up and down, a needle being mounted on the needle bar; and a latch needle drive unit, including a lower main shaft and a latch needle, the lower main shaft being drivenly connected to the main power shaft of the main shaft needle bar unit and being able to drive the needle bar to reciprocate up and down. Driven by the force shaft, the lower main shaft rotates, and under the transmission of the power transmission component inside the latch needle drive unit, it drives the latch needle to achieve compound motion in the forward and backward and up and down directions; a left winding hook assembly and a right thread-stopping hook assembly are connected to the main shaft needle bar unit and are driven by the active force shaft to oscillate back and forth around the needle, and the left winding hook assembly and the right thread-stopping hook assembly can selectively participate in the winding and knotting action of the latch needle and the needle; an upper feeding system and a lower feeding system work together to feed the sewing material to the needle in a pattern.

[0006] In a specific embodiment of this utility model, the main shaft needle bar unit further includes a main synchronous pulley fixed on the end of the main power shaft away from the tail end of the needle bar. The main synchronous pulley is connected to the motor synchronous pulley connected to the output shaft of the main motor via a main synchronous belt. A needle bar crank is also installed at the front end of the main power shaft near the needle bar, and a needle bar connector is provided at the middle position of the needle bar body. The needle bar crank is connected to the needle bar connector via a needle bar connecting rod. A needle bar connecting rod pin is provided on the needle bar connecting rod for hinged connection with the needle bar crank, thereby realizing the transmission connection between the main power shaft and the needle bar.

[0007] In another specific embodiment of this utility model, a hollow machine base platform is formed in the middle of the machine base, and a machine base head for fitting shoes is formed at the front end of the machine base. A needle plate is also provided above the machine base head. The needle plate is provided with a thread stop plate and a side block. The thread stop plate is used to participate in the winding and knotting action of the tongue needle and the machine needle, and the side block is used to position the sewing material.

[0008] In another specific embodiment of this utility model, the tongue needle drive unit is disposed in the base and includes a tongue needle power input component, a tongue needle up-and-down swing drive component, a tongue needle forward-and-back movement drive component, and a tongue needle linkage component. A tongue needle rod is fitted onto the tongue needle. The tongue needle up-and-down swing drive component and the tongue needle linkage component are both connected to the tongue needle rod for transmission, thereby driving the tongue needle to perform a compound motion in the forward-and-backward and up-and-down directions. The tongue needle power input component is connected to the drive shaft on the main spindle rod unit and can transmit the power from the drive shaft to the lower main spindle. The tongue needle power input component includes an upper tongue needle synchronous pulley fixedly mounted on the drive shaft and a lower tongue needle synchronous pulley fixed on the lower main spindle. The upper and lower tongue needle synchronous pulleys are connected by a tongue needle synchronous belt to achieve power transmission. The tongue needle up-and-down swing drive component converts the rotational motion of the lower main spindle into the up-and-down reciprocating motion of the tongue needle. The tongue needle up-and-down swing drive component includes a tongue needle up-and-down movement cam. The system comprises a latch needle up-and-down moving roller, a latch needle up-and-down moving rocker arm, a latch needle up-and-down swing shaft, and a latch needle up-and-down swing frame. The latch needle up-and-down moving cam is fitted and installed at the front end of the lower main shaft. The latch needle up-and-down moving roller is fitted and installed in the track groove of the latch needle up-and-down moving cam. The latch needle up-and-down moving roller is fixedly connected to the lower end of the latch needle up-and-down moving rocker arm via a latch needle up-and-down moving roller pin. One end of the latch needle up-and-down swing shaft along its length is fixedly connected to the upper output end of the latch needle up-and-down moving rocker arm. The tongue needle up-and-down rocker arm can drive the tongue needle up-and-down swing shaft to swing under the drive of the roller. A swing shaft bracket and a swing shaft copper sleeve are also provided on the tongue needle up-and-down swing shaft. The swing shaft bracket can be installed on the machine base to realize the movement limit of the tongue needle up-and-down swing shaft body. The tongue needle up-and-down swing frame is installed at the end of the tongue needle up-and-down swing shaft away from the tongue needle up-and-down rocker arm in the length direction. The tongue needle rod passes through the tongue needle up-and-down swing frame and is fixedly connected to it.

[0009] In another specific embodiment of this utility model, the tongue needle forward and backward movement drive assembly includes a power arc gear, a gear shaft, a driving arc gear, a driven arc gear, an arc gear bracket, a crank shaft, and a tongue needle forward and backward movement crank. The power arc gear is fixedly mounted on the lower main shaft, and the gear shaft extends vertically with its bottom gear meshing with the power arc gear. The arc gear bracket is positioned above the power arc gear and is fixedly connected to the base. The gear shaft passes upward through the bottom panel of the arc gear bracket and rotates with the arc gear bracket via a bearing. Both the driving and driven arc gears are located within the inner cavity of the arc gear bracket. The driving arc gear is fixedly mounted on the top end of the gear shaft, while the driven arc gear is horizontally positioned and meshes with the driving arc gear. The crank shaft passes through the left and right side panels of the arc gear bracket and rotates with the arc gear bracket via two bearings. The arc gear bracket is also equipped with a mechanism for axially moving the crank shaft. A positioning arc gear bracket fixing washer is provided. The crankshaft shaft passes through the driven arc gear and is fixedly installed with it. The driven arc gear can drive the crankshaft to reciprocate. The forward and backward movement crank of the latch needle is fitted onto the crankshaft, and the forward and backward movement crank of the latch needle is connected to the latch needle linkage assembly through an eccentric pin. A latch needle shank chuck is provided at the middle position of the latch needle shank. The latch needle linkage assembly of the latch needle drive unit includes a linkage rod, a front rod end bearing, and a rear rod end bearing. The rear rod end bearing is fitted together with an eccentric pin mounted on the front and rear movement crank of the latch needle. The rear end of the linkage rod body is fixedly connected to the threaded end of the rear rod end bearing, while the front end of the linkage rod body is fixedly connected to the threaded end of the front rod end bearing. The front rod end bearing and the latch needle rod chuck are connected by a linkage block, thereby realizing the transmission connection between the front and rear movement crank of the latch needle and the latch needle rod, so that the front and rear movement drive assembly can drive the latch needle to achieve reciprocating motion in the front and rear directions.

[0010] In another specific embodiment of this utility model, a tongue needle seat is provided on the tongue needle of the tongue needle driving unit. The tongue needle seat is fixedly connected to the tongue needle rod. A left tongue needle seat guide block and a right tongue needle seat guide block are respectively provided on the left and right sides of the tongue needle seat. The left and right tongue needle seat guide blocks are arranged opposite to each other. Both the left and right tongue needle seat guide blocks have elongated grooves extending in the horizontal direction. Both are fixedly installed at the top of the machine head of the machine base by fasteners installed in the elongated grooves. The installation position of the left and right tongue needle seat guide blocks can be adjusted through the elongated grooves, thereby adjusting the position of the tongue needle seat and the tongue needle to adjust the distance between the tongue needle and the machine needle to adapt to different winding and knotting requirements.

[0011] In a further specific embodiment of this utility model, the left winding hook assembly includes a left winding hook cam fixedly mounted on the drive shaft, a left roller, a left winding hook cam swing arm, a fulcrum shaft, a left winding hook rocker arm clamping block, a left winding hook rocker arm, and a left winding hook; wherein, when the drive shaft rotates, the left winding hook cam moves accordingly, and an annular left winding hook cam mating groove is provided in the left winding hook cam, the left roller is mated and installed in the left winding hook cam mating groove, and the left winding hook cam can drive the left roller to reciprocate, and the left roller is hinged to one end of the left winding hook cam swing arm by a left roller pin, the swing of the left roller will drive the entire left winding hook hook. The movement of the winding hook cam swing arm is such that one end of the fulcrum shaft along its length is fixed to the other end of the left winding hook cam swing arm away from the left roller, and the left winding hook rocker arm clamping block is fixed to the other end of the fulcrum shaft along its length. The left winding hook rocker arm clamping block is linked with the fulcrum shaft. The left winding hook rocker arm is fixedly connected to the lower position of the left winding hook rocker arm clamping block and can swing back and forth under the drive of the fulcrum shaft. The left winding hook is fixedly mounted on the left winding hook rocker arm through a left winding hook shaft. The left winding hook and the left winding hook shaft swing together with the left winding hook rocker arm clamping block, and the left winding hook can cooperate with the winding and knotting action of the latch needle and the needle.

[0012] In a further specific embodiment of this utility model, the right line stop hook assembly includes a right line stop hook cam, a right roller, a right line stop hook cam swing arm, a right line stop hook rocker arm clamping block, a right line stop hook rocker arm, and a right line stop hook; wherein, when the drive shaft rotates, the right line stop hook cam moves accordingly, and the right line stop hook cam is also provided with an annular right line stop hook cam mating groove, and the right roller is mated and installed in the right line stop hook cam mating groove, and the right line stop hook cam can drive the right roller to swing back and forth, the right roller is hinged to one end of the right line stop hook cam swing arm by a right roller pin, the swing of the right roller will drive the movement of the entire right line stop hook cam swing arm, and the end of the right line stop hook cam swing arm away from the right roller is fixedly fitted on the... At the middle position of the fulcrum shaft body, a fulcrum sleeve is also fitted on the fulcrum shaft body. The two axial ends of the fulcrum sleeve are respectively limited by the left winding hook rocker arm clamping block and the retaining ring. The right blocking hook rocker arm clamping block is fixed to the fulcrum shaft body near the end of the right blocking hook cam swing arm. The right blocking hook rocker arm clamping block can swing back and forth under the drive of the fulcrum sleeve. The right blocking hook rocker arm is fixedly connected to the lower position of the right blocking hook rocker arm clamping block, and the right blocking hook is fixedly installed at the front end of the right blocking hook rocker arm through a right blocking hook shaft. The right blocking hook swings together with the right blocking hook rocker arm clamping block, and the right blocking hook can cooperate with the left winding hook to complete the winding and knotting action of the latch needle and the needle.

[0013] In yet another specific embodiment of this utility model, the upper feeding system is located at the front end of the machine head and includes a pressing drive assembly, an upper feeding roller assembly, and an upper feeding power assembly; wherein the pressing drive assembly includes a cylinder, a piston connected to the cylinder, a pressing rod connected to the lower end of the piston, a pressing spring, and a pressing rod guide block through which the pressing rod passes and is movable; the cylinder is located on the machine head, and the pressing rod is pressed by the pressing rod guide block passing through it. The guide spring is sleeved on the outer circumference of the pressure rod, thereby providing elastic pressure to the upper feed roller assembly to press the sewn fabric. The cylinder is configured to drive the piston after gas is introduced, thereby lifting the pressure rod and the entire upper feed roller assembly to allow for the insertion or removal of the sewn fabric. The upper feed roller assembly includes an upper feed roller, an upper feed roller mounting bracket fitted on the upper feed roller, an upper feed roller connecting frame, an upper feed roller deflector block, and a deflector block compression spring. The upper feed roller mounting bracket... The upper feeding roller is fixedly connected to the upper feeding roller connecting frame. The upper feeding roller steering block is movably fitted onto the lower end of the clamping rod body. The upper feeding roller connecting frame is connected to the upper feeding roller steering block. The steering block compression spring abuts against the lower position of the feeding roller steering block and provides a steering and restoring force to the feeding roller steering block. The steering block compression spring is limited by a fixed washer located below it. The cylinder of the clamping drive assembly can drive the upper feeding roller to move up and down through the movement of the piston. The upper feeding power assembly includes an upper feeding motor and an upper feeding motor bracket for fixing the upper feeding motor. The upper feeding motor bracket is fixedly installed on the machine head, and the drive shaft of the upper feeding motor is connected to the upper feeding roller mounting bracket of the upper feeding roller assembly through a universal connecting rod. This allows the upper feeding motor to drive the upper feeding roller to rotate. The upper feeding roller can cooperate with the lower feeding system to achieve feeding action according to the pattern requirements.

[0014] In yet another specific embodiment of this utility model, the lower feeding system is installed within the machine base and can cooperate with the upper feeding roller assembly to achieve patterned feeding; the lower feeding system includes a lower feeding power assembly, a lower feeding transmission assembly, and a gear ring assembly; wherein, the lower feeding power assembly includes a feeding gear ring motor and a feeding gear ring transmission shaft, the power output shaft of the feeding gear ring motor and one end of the feeding gear ring transmission shaft in the length direction are connected by a connecting bushing, and the lower feeding transmission assembly includes a lower feeding drive gear, a lower feeding driven gear, and a long gear shaft that are sequentially connected to the feeding gear ring transmission shaft, the long gear shaft being rotatably supported by a long gear shaft bearing. On a gear bracket, the gear ring assembly includes a lower feeding gear ring and a gear ring support plate. The lower feeding gear ring meshes with the long gear shaft of the lower feeding transmission assembly. The gear ring support plate is fixedly installed in the machine base, and the lower feeding gear ring is rotatably supported on the gear ring support plate. A support plate notch is provided on the gear ring support plate to allow space for the latch needle. The power output by the feeding gear ring motor is transmitted sequentially through the connecting bushing, the feeding gear ring transmission shaft, the lower feeding drive gear, the lower feeding driven gear, and the long gear shaft, ultimately driving the lower feeding gear ring to rotate. The lower feeding gear ring and the upper feeding roller work together under the independent control of their respective motors to sew patterned stitches.

[0015] The advantages of this utility model are mainly reflected in the following aspects: First, the technical solution provided by this utility model achieves precise electric control. Through independent power sources such as the main motor, the upper feeding motor, and the feeding gear motor, the needle bar of the main shaft needle bar unit moves up and down, the latch needle of the latch needle drive unit performs compound movement, and the feeding action of the upper and lower feeding system is driven respectively. This achieves precise control of the needle holder swing, latch needle movement, and feeding process, supports digital programming of patterned stitches, significantly improves sewing accuracy and efficiency, and offers flexible adjustment, effectively improving sewing accuracy and adaptability. Simultaneously, the latch needle stroke can be adjusted via the eccentric pin of the latch needle forward and backward movement crank, and the distance between the needle and the latch needle can be efficiently adjusted via the long groove structure of the left and right latch needle seat guide blocks. The position of the thread-stop hook can also be adjusted via the fulcrum shaft and clamping block, flexibly adapting to different fabric thicknesses, pattern requirements, and thread winding and knotting needs, reducing the adjustment costs of adapting the equipment to different processes. Secondly, this utility model adopts a modular design of the main shaft needle bar unit, the latch needle drive unit, the left thread winding hook assembly, the right thread-stop hook assembly, the upper feeding system, and the lower feeding system. Each unit achieves coordinated action through synchronous belts, gears, and other transmission structures. The modular design is compact and provides ample operating space. The overall layout is compact, significantly reducing the equipment's volume and facilitating the sewing of complex fabrics and stitches. Moreover, the hollow machine base platform formed in the middle of the base and the front head structure of the base provide a large amount of operating space, making it convenient for operators to sew complex stitches, while also adapting to large-size fabrics. The placement and sewing of the left and right thread hooks improve operational convenience. Third, both the left and right thread hook assemblies are cam-driven, and their functions are diverse, allowing them to independently or collaboratively participate in the thread winding and knotting actions of the latch needle and machine needle. They support combined sewing of main and auxiliary threads, effectively increasing stitch density and improving the aesthetics of the sewn products. The right thread hook, by adjusting its installation position, can prevent missed stitches during sewing. Furthermore, the swinging motion of the left and right thread hooks can selectively and precisely coordinate with the needle bar and latch needle movements, reducing stitch deviation, enhancing overall sewing stability, ensuring consistent stitch quality in batches of sewn products, and significantly improving stitch quality and sewing stability. Fourth, the upper feeding system uses a cylinder to drive the lifting and lowering of the upper feeding rollers. The elastic pressure provided by the compression spring ensures the fabric is pressed tightly. Meanwhile, the upper feed roller can rotate 90° via the steering block, facilitating needle plate disassembly, parts replacement, and equipment maintenance, thus improving maintenance convenience. The lower feed system achieves intermittent feeding through gear transmission and the lower feed gear ring. The overall feeding system is highly efficient and flexible in process adaptation, meeting diverse sewing needs. Furthermore, the upper and lower feed systems are driven by independent motors and can work in conjunction with the pattern editing function to generate various stitch combinations such as three-needle-one-feed and two-needle-one-feed, adapting to different process requirements. Simultaneously, the annular structure of the lower feed gear ring meets multi-directional feeding needs, and the notch design of the gear ring support plate avoids interference with the latch needle drive unit, ensuring coordinated operation of all components and further improving feeding efficiency and sewing reliability. Attached Figure Description

[0016] Figure 1 This is an exploded view of the overall structure of this utility model; Figure 2 This is an exploded view of the spindle needle bar unit of this utility model; Figure 3 This is an exploded view of the structure of the tongue needle driving unit of this utility model; Figure 4 This is a schematic diagram of the structure of the left winding hook assembly and the right blocking hook assembly of this utility model.

[0017] Figure 5 This is a schematic diagram of the feeding system of this utility model; Figure 6 This is a schematic diagram of the bottom feeding system of this utility model; Figure 7 This is a schematic diagram of the structure of the sewing material formed by the machine needle and the tongue needle of this utility model; Figure 8 Examples of the application of this utility model in sewing materials and patterned stitches.

[0018] In the diagram: 1. Machine head, 11. Machine head cavity; 2. Machine base, 21. Machine base platform, 22. Machine base head, 23. Needle plate, 231. Thread stop plate, 232. Side block; 3. Main spindle needle bar unit, 31. Main motor, 311. Motor synchronous pulley, 32. Main drive shaft, 33. Needle bar, 331. Needle, 34. Main synchronous pulley, 341. Main synchronous belt, 35. Needle bar crank, 36. Needle bar connector, 37. Needle bar connecting rod, 371. Needle bar connecting rod pin; 4. Latch needle drive unit, 41. Lower spindle, 42. Latch needle, 421. Latch needle seat, 422. Left latch needle seat guide block, 423. Right latch needle seat guide block, 43. Latch needle power input assembly, 431. Upper latch needle synchronous pulley, 432. Lower latch needle synchronous pulley. 433. Tongue needle timing belt; 44. Tongue needle up-and-down swing drive assembly; 441. Tongue needle up-and-down movement cam; 442. Tongue needle up-and-down movement roller; 4421. Tongue needle up-and-down movement roller pin; 443. Tongue needle up-and-down movement rocker arm; 444. Tongue needle up-and-down swing shaft; 4441. Swing shaft bracket; 4442. Swing shaft copper sleeve; 445. Tongue needle up-and-down swing frame; 45. Tongue needle forward-and-backward movement drive assembly; 451. Power arc gear; 452. Gear shaft; 453. Driving arc gear; 454. Driven arc gear; 455. Arc gear bracket; 4551. Arc gear bracket fixing washer; 456. Crankshaft; 457. Tongue needle forward-and-backward movement crank; 4571. Eccentric pin; 46. Tongue needle linkage assembly; 461. Linkage rod; 4 62. Front rod end bearing; 463. Rear rod end bearing; 464. Linkage block; 47. Tongue needle rod; 471. Tongue needle rod chuck; 5. Left winding hook assembly; 51. Left winding hook cam; 511. Left winding hook cam mating groove; 52. Left roller; 521. Left roller pin; 53. Left winding hook cam swing arm; 54. Pivot shaft; 541. Pivot bushing; 55. Left winding hook rocker arm clamping block; 56. Left winding hook rocker arm; 57. Left winding hook; 571. Left winding hook shaft; 6. Right stop hook assembly; 61. Right stop hook cam; 611. Right stop hook cam mating groove; 62. Right roller; 621. Right roller pin; 63. Right stop hook cam swing arm; 64. Right stop hook rocker arm clamping block; 65. Right stop hook rocker arm... 7. Upper feeding system, 71. Pressing drive assembly, 711. Cylinder, 712. Piston, 713. Pressing rod, 714. Pressing spring, 715. Pressing rod guide block, 72. Upper feeding roller assembly, 721. Upper feeding roller, 722. Upper feeding roller mounting bracket, 723. Upper feeding roller connecting frame, 724. Upper feeding roller steering block, 725. Steering block compression spring, 7251. Fixing shim, 73. Upper feeding power assembly, 731. Upper feeding motor, 732. Upper feeding motor bracket, 733. Universal connecting rod; 8. Lower feeding system, 81. Lower feeding power assembly, 811. Feeding gear ring motor, 812. Feeding gear ring drive shaft, 813.82. Connecting bushing; 82. Lower feed transmission assembly; 821. Lower feed drive gear; 822. Lower feed driven gear; 823. Long gear shaft; 8231. Long gear shaft bearing; 824. Gear bracket; 83. Gear ring assembly; 831. Lower feed gear ring; 832. Gear ring support plate; 8321. Support plate notch; 9. Sewing material; 10. Sewing thread; 20. Pattern stitch. Detailed Implementation

[0019] The following will provide a detailed description by way of embodiments. However, the description of the embodiments is not intended to limit the invention. Any formal but not substantive equivalent transformations made based on the inventive concept should be considered within the scope of the invention's technical solution.

[0020] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back refer to the current situation. Figure 1 It refers to the position and state of the invention, and therefore cannot be understood as a special limitation on the technical solution provided by the invention.

[0021] Please see Figures 1 to 7This invention illustrates an electrically controlled needle holder oscillation transmission device, comprising: a head 1, which is hollow inside and forms a head cavity 11; a base 2, which is fixedly installed below the head 1; a main shaft needle bar unit 3, including a main motor 31, a drive shaft 32, and a needle bar 33 drivenly connected to the front end of the drive shaft 32, wherein the main motor 31 drives the drive shaft 32 to rotate, and the drive shaft 32 can drive the needle bar 33 to reciprocate up and down, and a needle 331 is also mounted on the needle bar 33; and a tongue needle drive unit 4, comprising... The device includes a lower main shaft 41 and a latch needle 42. The lower main shaft 41 is connected to the main power shaft 32 of the main shaft needle bar unit 3 and can rotate under the drive of the main power shaft 32. The lower main shaft 41 can drive the latch needle 42 to achieve compound motion in the forward and backward and up and down directions under the transmission of the power transmission component inside the latch needle drive unit 4. The stable movement of the needle 331 and the latch needle 42 is achieved through the transmission between the main motor 31 and the main power shaft 32, effectively replacing the traditional manual or semi-manual power, and achieving stable power output and precise control of the needle bar movement stroke. To improve the accuracy of stitch sewing, the lower spindle 41 relies on the drive shaft 32 for transmission, eliminating the need for an additional motor. This simplifies the structure while ensuring the synchronization of the movement of the latch needle 42 and the needle 331. A left thread hook assembly 5 and a right thread stop hook assembly 6 are also shown. These two assemblies are connected to the spindle needle bar unit 3 and are driven by the drive shaft 32 to reciprocate around the needle 331. The left thread hook assembly 5 and the right thread stop hook assembly 6 can selectively engage with the latch needle 42 and the needle 331. The winding and knotting action of 1, the left winding hook assembly 5 and the right blocking hook assembly 6 enable the sewing equipment to adapt to the winding requirements of different patterns, greatly improving the flexibility of pattern editing; the upper feeding system 6 and the lower feeding system 7, the aforementioned upper feeding system 7 and the lower feeding system 8 work together to feed the sewing material to the needle 331 in the pattern. The aforementioned upper feeding system 6 and the lower feeding system 7 are both kept in power synchronization with the main power shaft 32. During operation, the two work together to control the movement direction, speed and step distance of the sewing material, so that the needle 331 forms a shell pattern on the sewing material according to the preset trajectory.

[0022] In this embodiment, the head cavity 11 of the aforementioned head 1 is the installation and protection space for the aforementioned main drive shaft 32 and the tongue needle drive unit 4 as core transmission components, which can prevent dust and wire ends from entering the transmission system; the base 2 serves as the support base of the whole machine, and the head 1 is stably supported by a fixed connection to ensure the stability of all moving parts in the head during operation. The overall structure is compact and the operation is smooth.

[0023] Please see Figure 1 and Figure 2The aforementioned main shaft needle bar unit 3 also includes a main synchronous pulley 34 fixed to the end of the aforementioned drive shaft 32 away from the tail end of the aforementioned needle bar 33. The aforementioned main synchronous pulley 34 is connected to the motor synchronous pulley 311 connected to the output shaft of the aforementioned main motor 31 via a main synchronous belt 341. A needle bar crank 35 is also installed at the front end of the aforementioned drive shaft 32 near the aforementioned needle bar 33, and a needle bar connector 332 is provided at the middle of the aforementioned needle bar 33. The aforementioned needle bar crank 35 is connected to the needle bar connector 36 via a needle bar connecting rod 37. A needle bar connecting rod pin 371 is provided on the aforementioned needle bar connecting rod 37 for hinge connection with the aforementioned needle bar crank 35, thereby realizing the transmission connection between the aforementioned drive shaft 32 and the needle bar 33. After the machine 31 is powered on and started, its output shaft drives the coaxially fixed motor synchronous pulley 311 to rotate. The motor synchronous pulley 311 transmits the rotational power to the main synchronous pulley 34 at the tail end of the drive shaft 32 through the main synchronous belt 341. Since the main synchronous pulley 34 is fixed on the drive shaft 32, the drive shaft 32 rotates synchronously with the main synchronous pulley 34. The main motor 31 forms a belt drive system with the drive shaft 32 through the main synchronous pulley 34. The main synchronous belt 341 preferably adopts a multi-wedge belt structure, and its inner surface tooth profile precisely meshes with the pulley tooth groove to ensure the synchronicity of power transmission. At the same time, by utilizing the power conversion structure of the needle bar 33 and the needle bar crank 35, the rotation of the drive shaft 32 is accurately converted into the up and down movement of the needle bar 33. The small gap between the parts further improves the accuracy and reliability of the sewing of the needle 331.

[0024] Please continue reading Figure 1 The aforementioned base 2 has a hollow base platform 21 in the middle, and a base head 22 for mounting shoes is formed at the front end of the base 2. The hollow base platform 21 serves as the installation and housing space for the lower spindle 41 of the feeding system 8 and the tongue needle drive unit 4 below the equipment, providing efficient protection and preventing interference from external impurities. When sewing irregularly shaped shoes such as leather shoes and athletic shoes, the shoes are mounted on the base head 22. The base head 22 has a hemispherical shape and can fit the shoe. The internal contour of the device adapts to the shape of the shoe, and after being fitted, it can stably fix the shoe and prevent the shoe material from shifting during sewing. At the same time, the surface of the shoe after fitting can naturally conform to the area below the needle 331, which makes it convenient for the needle 331 and the tongue needle 42 to work together to complete the shell pattern sewing on the edge or surface of the shoe. Stable sewing can be achieved without manual hand pressing, which reduces the difficulty of operation and avoids the displacement of the sewing material caused by hand. This allows the operator not to be distracted by fixing the sewing material and can focus on pattern selection and sewing control, improving the stability and reliability of operation, and expanding the applicable scenarios of the equipment.

[0025] Please pay close attention. Figure 3 and combined Figure 1The aforementioned needle drive unit 4 is disposed within the aforementioned base 2 and includes a needle power input component 43, a needle up-and-down swing drive component 44, a needle forward-and-backward motion drive component 45, and a needle linkage component 46. A needle rod 47 is mounted on the aforementioned needle 42. The aforementioned needle up-and-down swing drive component 44 and the needle linkage component 46 are both connected to the needle rod 47, thereby driving the aforementioned needle 42 to perform a combined forward-and-backward and up-and-down motion. The aforementioned needle power input component 43 is connected to the drive shaft 32 on the aforementioned main shaft needle rod unit 3 and can transmit the power on the drive shaft 32 to the aforementioned lower main shaft 41. The needle power input component 43 includes a fixed... A timing pulley 431 on the upper part of the tongue needle is fixedly mounted on the main drive shaft 32, and a timing pulley 432 on the lower part of the tongue needle is fixed on the aforementioned lower main shaft 41. The timing pulley 431 and the timing pulley 432 are connected by a timing belt 433 to achieve power transmission. The power transmission design of the timing belt and pulley is compact and reliable, and the power transmission is synchronized and precise. The aforementioned tongue needle up-and-down swing drive assembly 44 is used to convert the rotational motion of the aforementioned lower main shaft 41 into the up-and-down reciprocating motion of the aforementioned tongue needle 42. The aforementioned tongue needle up-and-down swing drive assembly 44 includes a tongue needle up-and-down action cam 441, a tongue needle up-and-down action roller 442, a tongue needle up-and-down action rocker arm 443, a tongue needle up-and-down swing shaft 444, and a tongue needle up-and-down swing mechanism. The frame 445 houses the aforementioned latch needle up-and-down movement cam 441, which is mounted at the front end of the aforementioned lower main shaft 41. The aforementioned latch needle up-and-down movement roller 442 is mounted in the track groove of the latch needle up-and-down movement cam 441. The latch needle up-and-down movement roller 442 is fixedly connected to the lower end of the aforementioned latch needle up-and-down movement rocker arm 443 via a latch needle up-and-down movement roller pin 4421. One end of the aforementioned latch needle up-and-down swing shaft 444 along its length is fixedly connected to the upper output end of the aforementioned latch needle up-and-down movement rocker arm 443. The aforementioned latch needle up-and-down movement rocker arm 443 can drive the latch needle up-and-down swing shaft 444 to swing under the drive of the roller 442. The aforementioned latch needle up-and-down swing shaft 444 is also equipped with... A swing shaft bracket 4441 and a swing shaft copper sleeve 4442 are provided. The swing shaft bracket 4441 can be installed on the base 2 and limit the movement of the tongue needle swing shaft 444 body. The swing shaft bracket 4441 effectively prevents the radial displacement of the tongue needle swing shaft 444. The swing shaft copper sleeve 4442 reduces mechanical friction, which not only extends the service life of the parts, but also avoids the tongue needle 42 movement deviation caused by the displacement of the parts. The tongue needle swing frame 445 is installed at the end of the tongue needle swing shaft 444 away from the tongue needle swing rocker arm 443 in the length direction. The tongue needle rod 47 passes through the tongue needle swing frame 445 and is fixedly connected to it.

[0026] Furthermore, the aforementioned tongue needle forward and backward movement drive assembly 45 includes a power arc gear 451, a gear shaft 452, a driving arc gear 453, a driven arc gear 454, an arc gear bracket 455, a crank shaft 456, and a tongue needle forward and backward movement crank 457. The aforementioned power arc gear 451 is fixedly mounted on the aforementioned lower main shaft 41, while the aforementioned gear shaft 452 extends vertically and the gear portion at the bottom end of the gear shaft 452 meshes with the aforementioned power arc gear 451. The aforementioned arc gear bracket 455 is located above the aforementioned power arc gear 451 and is fixedly connected to the aforementioned base 2. The aforementioned gear shaft 452 passes upward through the bottom panel of the aforementioned arc gear bracket 455 and is connected to the arc gear bracket 455 via a bearing. To achieve rotational engagement, both the driving arc gear 453 and the driven arc gear 454 are housed within the inner cavity of the aforementioned arc gear bracket 455. The driving arc gear 453 is fixedly mounted on the top end of the aforementioned gear shaft 452, while the driven arc gear 454 is horizontally positioned and meshes with the driving arc gear 453. The aforementioned crankshaft 456 passes through the left and right side panels of the aforementioned arc gear bracket 455 and is rotatably connected to the arc gear bracket 455 via two bearings. A crankshaft bracket fixing washer 4551 is also provided on the aforementioned arc gear bracket 455 for axially positioning the aforementioned crankshaft 456. The shaft of the aforementioned crankshaft 456 passes through the front... The passive arc gear 454 is fixedly installed and drives the crankshaft 456 to reciprocate. The forward and backward movement crank 457 of the latch needle is installed on the crankshaft 456 and is connected to the latch needle linkage assembly 46 via an eccentric pin 4571. By rotating the eccentric pin 4571, the movement of the latch needle rod 47 can be adjusted, thereby adjusting the stroke of the latch needle 42 to adapt to different stitch requirements. A latch needle rod chuck 471 is provided at the middle position of the latch needle rod 47. The latch needle linkage assembly 46 of the latch needle drive unit 4 includes a linkage rod 461 and a front rod end bearing. 462 and the rear rod end bearing 463 are fitted together with the eccentric pin 4571 mounted on the front and rear movement crank 457 of the aforementioned tongue needle. The rear end of the aforementioned linkage rod 461 is fixedly connected to the threaded end of the rear rod end bearing 463, while the front end of the linkage rod 461 is fixedly connected to the threaded end of the aforementioned front rod end bearing 462. The front rod end bearing 462 and the aforementioned tongue needle rod chuck 471 are connected by a linkage block 464, thereby realizing the transmission connection between the aforementioned front and rear movement crank 457 of the tongue needle and the tongue needle rod 47, so that the aforementioned front and rear movement drive assembly 45 can drive the aforementioned tongue needle 41 to achieve reciprocating motion in the front and rear directions.The aforementioned forward and backward movement drive component 45 features clear reversing transmission with no interference in motion. It achieves power reversal from horizontal to vertical and back to horizontal via a two-stage arc gear system, avoiding conflict with the up-and-down movement transmission path of the tongue needle 42 and ensuring that the composite movements do not interfere with each other.

[0027] Furthermore, a tongue needle seat 421 is provided on the tongue needle 42 of the aforementioned tongue needle driving unit 4. The tongue needle seat 421 is fixedly connected to the aforementioned tongue needle rod 47. A left tongue needle seat guide block 422 and a right tongue needle seat guide block 423 are respectively provided on the left and right sides of the tongue needle seat 421. The left tongue needle seat guide block 422 and the right tongue needle seat guide block 423 are arranged opposite to each other. Both the left tongue needle seat guide block 422 and the right tongue needle seat guide block 423 have elongated slots extending in the horizontal direction. Both are fixedly installed at the top position of the machine head 22 of the aforementioned machine base 2 by fasteners installed in the elongated slots. The installation position of the aforementioned left tongue needle seat guide block 422 and the right tongue needle seat guide block 423 can be adjusted through the elongated slots. The left and right guide blocks 422 and 423 allow operators to adjust the position of the latch needle 421 and the latch needle 42 to adjust the distance between the latch needle 42 and the needle 331 to adapt to different winding and knotting requirements. The left and right guide blocks 422 and 423 allow operators to adjust the distance between the latch needle and the needle without disassembling the core components of the latch needle drive unit 4. This can adapt to winding and knotting requirements of different thicknesses of sewing materials and different stitch sizes, greatly improving the accuracy of operation. At the same time, the left and right guide blocks 422 and 423 limit the movement of the latch needle 421 and the latch needle 42, ensuring that the latch needle 421 can only move along the preset trajectory and preventing the latch needle 42 from deviating during movement.

[0028] Please see Figure 4The aforementioned left winding hook assembly 5 includes a left winding hook cam 51 fixedly mounted on the aforementioned drive shaft 32, a left roller 52, a left winding hook cam swing arm 53, a fulcrum shaft 54, a left winding hook rocker arm clamping block 55, a left winding hook rocker arm 56, and a left winding hook 57; wherein, when the aforementioned drive shaft 32 rotates, the aforementioned left winding hook cam 51 moves accordingly, and the left winding hook cam 51 is provided with an annular left winding hook cam mating groove 511, and the left roller 52 is mated and mounted on the left winding hook cam 57. The left winding hook cam 51 is located within the groove 511 of the hook cam, and the left winding hook cam 51 can drive the left roller 52 to reciprocate. The left roller 52 is hinged to one end of the left winding hook cam swing arm 53 via a left roller pin 521. The swing of the left roller 52 will drive the movement of the entire left winding hook cam swing arm 53. One end of the fulcrum shaft 54 ​​in the longitudinal direction is fixed to the other end of the left winding hook cam swing arm 53 away from the left roller 52. The left winding hook rocker arm clamping block 55 is fixed to... At the other end of the aforementioned fulcrum shaft 54 ​​along its length, the left winding hook rocker arm clamping block 55 is linked to the aforementioned fulcrum shaft 54. The aforementioned left winding hook rocker arm 56 is fixedly connected to the lower position of the aforementioned left winding hook rocker arm clamping block 55 and can reciprocate under the drive of the fulcrum shaft 54. The aforementioned left winding hook 57 is fixedly mounted on the left winding hook rocker arm 56 via a left winding hook shaft 571. The left winding hook 57 and the left winding hook shaft 571 swing together with the aforementioned left winding hook rocker arm clamping block 55. The left winding hook 57 can cooperate with the winding and knotting action of the aforementioned tongue needle 42 and needle 331. The left winding hook 57 is equipped with auxiliary sewing thread, which can participate in the formation of stitches and enrich the stitch patterns. The aforementioned left winding hook assembly 5 uses the aforementioned main force shaft 32 as the power source. The linkage and synchronization between the various parts are strong, which can avoid winding deviation caused by power delay. Moreover, the contact transmission accuracy between the left winding hook cam 51 and the left roller 52 is high, which can ensure the stability of the final swing trajectory of the left winding hook 57 and provide a guarantee for the reliability of winding and knotting.

[0029] Furthermore, the aforementioned right line-stopping hook assembly 6 includes a right line-stopping hook cam 61, a right roller 62, a right line-stopping hook cam swing arm 63, a right line-stopping hook rocker arm clamping block 64, a right line-stopping hook rocker arm 65, and a right line-stopping hook 66; wherein, when the aforementioned drive shaft 32 rotates, the aforementioned right line-stopping hook cam 61 moves accordingly, and the right line-stopping hook cam 61 can drive the right roller 62 to reciprocate, and the right roller 62 is fitted in the right line-stopping hook cam mating groove 611, and the right line-stopping hook cam 61 can drive The right roller 62 reciprocates and is hinged to one end of the right line-stopping hook cam swing arm 63 via a right roller pin 621. The swing of the right roller 62 drives the movement of the entire right line-stopping hook cam swing arm 63. The end of the right line-stopping hook cam swing arm 63 away from the right roller 62 is fixedly fitted at the middle position of the aforementioned pivot shaft 54. A pivot shaft sleeve 541 is also fitted on the pivot shaft 54. The axial ends of the pivot shaft sleeve 541 are respectively connected by the aforementioned left winding hook rocker arm clamping block 55 and the retaining ring. To limit the movement, the right line-stopping hook assembly 6 and the left line-winding hook assembly 5 share the fulcrum shaft 54 ​​as the power transmission shaft, making the overall structure more compact and reducing redundant parts. The aforementioned right line-stopping hook rocker arm clamping block 64 is fixedly connected to the shaft body of the aforementioned fulcrum shaft 54 ​​near the end of the right line-stopping hook cam swing arm 63. The aforementioned right line-stopping hook rocker arm clamping block 64 can reciprocate under the drive of the fulcrum shaft sleeve 541. The aforementioned right line-stopping hook rocker arm 65 is fixedly connected to the lower position of the aforementioned right line-stopping hook rocker arm clamping block 64, and the aforementioned right... The line-stopping hook 66 is fixedly installed at the front end of the right line-stopping hook rocker arm 65 via a right line-stopping hook shaft 661. The right line-stopping hook 66 swings together with the aforementioned right line-stopping hook rocker arm clamping block 64, and the right line-stopping hook 66 can cooperate with the aforementioned left winding hook 57 to complete the winding and knotting action of the aforementioned tongue needle 42 and needle 331. The aforementioned right line-stopping hook 66 can work in coordination with the aforementioned left winding hook 57 to better control the direction and tension of the line, avoid the problem of loose stitches when winding with a single line hook, and improve the knotting quality.

[0030] Please see Figure 5The upper feeding system 7 is located at the front end of the machine head 1 and includes a pressing drive assembly 71, an upper feeding roller assembly 72, and an upper feeding power assembly 73. The pressing drive assembly 71 includes a cylinder 711, a piston 712 connected to the cylinder 711, a pressing rod 713 connected to the lower end of the piston 712, a pressing spring 714, and a pressing rod guide block 715 through which the pressing rod 713 passes and is movable. The cylinder 711 is located on the machine head 1, the pressing rod 713 is guided by the pressing rod guide block 715 passing through it, and the pressing spring 714 is sleeved on the outer circumference of the pressing rod 713, thereby providing pressure to the upper feeding roller assembly 72. The elastic pressure of the tightly sewn fabric is controlled by a cylinder 711, which is configured to drive a piston 712 to lift a pressing rod 713 and the entire upper feeding roller assembly 72 after gas is introduced, so as to put in or take out the sewing material. The upper feeding roller assembly 72 includes an upper feeding roller 721, an upper feeding roller mounting bracket 722 fitted on the upper feeding roller 721, an upper feeding roller connecting frame 723, an upper feeding roller deflector block 724, and a deflector block compression spring 725. The upper feeding roller mounting bracket 722 and the upper feeding roller connecting frame 723 are fixedly connected. The upper feeding roller deflector block 724 is movably fitted on the lower end of the pressing rod 713, and the upper feeding roller connecting frame 723 is... 23 is connected to the upper feed roller steering block 724. The steering block compression spring 725 abuts against the lower position of the feed roller steering block 724 and provides steering and restoring force to the feed roller steering block 724. The steering block compression spring 725 is limited by a fixed washer 7251 located below it. The cylinder 711 of the pressing drive assembly 71 can drive the upper feed roller 721 to move up and down through the movement of the piston 712. Specifically, when gas is introduced into the cylinder 711, it drives the piston 712 upward and the pressing rod 713 upward, thereby driving the entire upper feed roller assembly 72 to lift. At this time, the sewing material can be easily put in or taken out. When it is necessary to disassemble and replace parts such as the needle plate or perform maintenance operations, First, air is supplied to cylinder 711 to raise the upper feed roller 721. At this time, external force is used to press down the feed roller deflector block 724. When the feed roller deflector block 724 moves downward, it overcomes the elastic pressure of the deflector block compression spring 725 below it. Since the upper feed roller 721 is connected to the feed roller deflector block 724 through the upper feed roller mounting bracket 722 and the upper feed roller connecting bracket 723, when the feed roller deflector block 724 is pressed down and rotated, it will drive the upper feed roller mounting bracket 722 and the upper feed roller 721 to rotate together. Finally, the upper feed roller 721 can be rotated 90 degrees. After the upper feed roller 721 is rotated 90 degrees, it will not obstruct the needle plate or maintenance area, which is convenient for disassembly, replacement or maintenance operations.After maintenance, the downward pressure on the feeding roller steering block 724 is released, the steering block compression spring 725 releases its elastic force, pushing the feeding roller steering block 724 to reset, thereby driving the upper feeding roller 721 to rotate back to its initial position. The upper feeding power assembly 73 includes an upper feeding motor 731 and an upper feeding motor bracket 732 for fixing the upper feeding motor 731. The upper feeding motor bracket 732 is fixedly installed on the machine head 1, and the drive shaft of the upper feeding motor 731 is connected to the upper feeding roller mounting bracket 722 of the upper feeding roller assembly 72 through a universal joint 733, so that the upper feeding motor 731 can drive the upper feeding roller 721 to rotate, and the upper feeding roller 721 can interact with the lower feeding roller. System 8 works in conjunction to achieve feeding actions according to pattern requirements. Specifically, after the upper feeding motor 731 starts, the air cylinder 711 is de-aired, and its output rotational power is transmitted to the upper feeding roller 721 through the universal connecting rod 732, causing it to rotate. The pressure spring 714 on the outer circle of the pressure rod 713 releases its elastic pressure, pushing the pressure rod 713 downward, thereby causing the upper feeding roller 721 to press tightly against the upper surface of the sewn fabric. The friction between the roller and the fabric drives the fabric to move. The universal connecting rod 733 can adapt to the angle changes of the upper feeding roller 721 during sewing, avoiding interruption or jamming of power transmission due to angle changes, ensuring the continuity of power transmission. At the same time, the upper feeding motor 731 is independently set and its speed can be precisely adjusted by electronic control to support the feeding speed requirements of different patterns.

[0031] Please see Figure 6The lower feeding system 8 is installed within the base 2 and can cooperate with the upper feeding roller assembly 72 to achieve patterned feeding. The lower feeding system 8 includes a lower feeding power assembly 81, a lower feeding transmission assembly 82, and a gear ring assembly 83. The lower feeding power assembly 81 includes a feeding gear ring motor 811 and a feeding gear ring transmission shaft 812. The power output shaft of the feeding gear ring motor 811 and one end of the feeding gear ring transmission shaft 812 in the longitudinal direction are connected by a connecting bushing 813. The connecting bushing 813 simplifies the connection between the motor and the transmission shaft. The connection structure facilitates later maintenance and replacement. The feeding gear ring motor 811 is driven independently and serves as a power source, along with the upper feeding motor 731, providing a flexible power control basis for coordinated feeding. The lower feeding transmission assembly 82 includes a lower feeding drive gear 821, a lower feeding driven gear 822, and a long gear shaft 823, which are sequentially connected to the feeding gear ring transmission shaft 812. The long gear shaft 823 is rotatably supported on a gear bracket 824 by a long gear shaft bearing 8231, which effectively restricts the radial and axial displacement of the long gear shaft 823. This ensures stable rotation of the long toothed shaft 823. The gear ring assembly 83 includes a lower feeding gear ring 831 and a gear ring support plate 832. The lower feeding gear ring 831 meshes with the long toothed shaft 823 of the lower feeding transmission assembly 82. The gear ring support plate 832 is fixedly installed in the machine base 2, and the lower feeding gear ring 831 is rotatably supported on the gear ring support plate 832. A support plate notch 8321 is provided on the gear ring support plate 832 to make way for the tongue needle 42. The annular gear ring structure of the gear ring support plate 832 can meet the multi-directional feeding requirements of complex patterns. The design of the support plate notch 8321 avoids interference between the lower feeding system 8 and the tongue needle drive unit 4, ensuring that all components of the machine work together without conflict. The power output by the feeding gear ring motor 811 is transmitted sequentially through the connecting bushing 813, the feeding gear ring transmission shaft 812, the lower feeding drive gear 821, the lower feeding driven gear 822, and the long gear shaft 823, ultimately driving the lower feeding gear ring 831 to rotate. The lower feeding gear ring 831 and the upper feeding roller 721 work together under the independent control of their respective motors to sew patterned stitches.

[0032] Please continue reading Figures 1 to 7 The applicant briefly describes the working principle of the technical solution provided by this utility model: When it is necessary to sew a shell-shaped stitch pattern, the main motor 31 of the main shaft needle bar unit 3 is started, and the main drive shaft 32 is driven to rotate through the transmission of various transmission components. The main drive shaft 32 drives the needle bar crank 35 to rotate, and then through the transmission of components such as the needle bar joint 332 and the needle bar connecting pin 371, the rotational motion is finally converted into the up-and-down reciprocating motion of the needle 331 at the lower end of the needle bar 33.

[0033] Simultaneously, when the main drive shaft 32 rotates, it synchronously drives the upper synchronous pulley 431 of the tongue needle on the tongue needle power input component 43 to rotate. The upper synchronous pulley 431 of the tongue needle drives the lower synchronous pulley 432 of the tongue needle to rotate through the tongue needle synchronous belt 433, which in turn drives the lower main shaft 41 to rotate. The power of the aforementioned lower main shaft 41 is transmitted in two ways: one way is through the power arc gear 421 of the aforementioned tongue needle forward and backward movement drive component 45 to drive the gear shaft 452 to rotate. The gear shaft 452 further drives the active arc gear 453, the passive arc gear 454, and the crank shaft 456 to move in sequence, and finally drives the tongue needle forward and backward movement crank 457 to rotate. The tongue needle forward and backward movement crank 457 then drives the tongue needle 42 to move in the forward and backward direction through the eccentric pin 4571 and the linkage rod 461, the front rod end bearing 462, the linkage block 464, the tongue needle shank chuck 471, and the tongue needle shank 47 in the tongue needle linkage component 46. On the other side, the lower main shaft 41 drives the latch needle up-and-down oscillation drive assembly 44 to rotate the latch needle up-and-down motion cam 441. The latch needle up-and-down motion roller 442, which is embedded in the track groove of the latch needle up-and-down motion cam 441, moves accordingly, thereby driving the latch needle up-and-down motion rocker arm 443 to swing. The latch needle up-and-down motion rocker arm 443 drives the latch needle up-and-down motion frame 445 to swing through the latch needle up-and-down motion shaft 444. The latch needle rod 47 swings synchronously with the latch needle up-and-down motion frame 445, ultimately driving the latch needle 42 to move up and down. After the two actions are coordinated, the latch needle 42 forms a compound motion in the up-and-down and back-and-forth directions, and the trajectory is in the shape of ">", which meets the requirements of winding and knotting.

[0034] Furthermore, when the main drive shaft 32 rotates, it further drives the left winding hook cam 51 of the left winding hook assembly 5 and the right blocking hook cam 61 of the right blocking hook assembly 6 to rotate; the left winding hook cam 51 drives the left roller 52 to reciprocate, thereby driving the left winding hook cam swing arm 53 to swing; the fulcrum shaft 54 ​​reciprocates with the left winding hook cam swing arm 53, thereby driving the left winding hook rocker arm clamping block 55 to swing, and the left winding hook rocker arm clamping block 55 ultimately drives the left winding hook 57 to swing around the needle 331; the left winding hook 57 is equipped with an auxiliary thread, which can participate in stitch formation and enrich the stitch pattern; in addition, the right blocking hook cam 61 drives the right roller 62 to reciprocate, thereby driving the right blocking hook cam swing arm 63 to swing, through The transmission through the pivot bushing 541 drives the right thread stop hook rocker arm clamping block 64 to swing, and the right thread stop hook rocker arm clamping block 64 ultimately drives the right thread stop hook 66 to swing back and forth. According to the pattern requirements, the right thread stop hook 66 can selectively participate in the winding and knotting action in conjunction with the tongue needle 42 and the needle 331. The left winding hook 57 and the right thread stop hook 66 cannot participate in the winding action at the same time: when the right thread stop hook 66 needs to be used alone, the left winding hook 57 and the matching left winding hook shaft 571 of the left winding hook assembly 5 can be removed from the left winding hook rocker arm 56; when the left winding hook 57 needs to be used alone, the right thread stop 66 and the matching right thread stop hook shaft 661 of the right thread stop hook assembly 6 can be removed from the right thread stop hook rocker arm 65, and only one set can be selected to participate in the winding action.

[0035] During the operation of the aforementioned main motor 31, the upper feeding motor 731 starts simultaneously, driving the upper feeding roller 721 to rotate via the universal connecting rod 733. Meanwhile, the feeding gear ring motor 811 operates simultaneously, driving the feeding gear ring drive shaft 812 to rotate via the connecting bushing 813. The feeding gear ring drive shaft 812 sequentially drives the lower feeding drive gear 821, the lower feeding driven gear 822, and the long gear shaft 82 to rotate. The long gear shaft 823 drives the lower feeding gear ring 831 to rotate through gear meshing. The upper feeding roller 721 and the lower feeding gear ring 831 of the lower feeding system 8 work in coordination, allowing adjustment of feeding parameters according to preset pattern requirements to achieve different pattern combinations. The lower feeding gear ring 831 and the aforementioned upper feeding roller 721 work in coordination, enabling different pattern combinations according to pattern requirements.

[0036] The applicant further describes the overall collaborative sewing process of the technical solution after power and air supply: After power and air supply are activated, the control switch of the equipment is turned on, the cylinder 711 is ventilated, causing the upper feed roller 721 to lift, placing the sewing material above the needle plate 3 and corresponding to the position above the lower feed tooth ring 731; then the cylinder 711 is de-ventilated, the pressure spring 714 releases pressure, and the upper feed roller 721 presses down to compress the sewing material; afterwards, the aforementioned main motor 31 starts, the needle 331 descends to pierce the sewing material, and the latch needle 42 swings along a ">" shaped trajectory to below the needle plate 23, moving forward to its maximum range. After the process is completed, the needle is pulled back, hooking the thread inside the needle eye of the needle 331 and pulled backward. The needle 331 returns to its original position above the fabric, and the latch needle 42 moves synchronously to the surface above the needle plate 23, hooking the thread on the needle 331 again within the previously hooked loop, completing one knotting action. This cycle is repeated, alternating knots above and below the fabric. Simultaneously, the upper feed roller 721 and the lower feed toothed ring 831 jointly control the feeding rhythm according to a preset program, enabling intermittent feeding (such as feeding once for one stitch, feeding once for two stitches, or feeding once for three stitches), ultimately forming a knot like... Figure 8 The shell-shaped pattern shown; after the left thread hook 57 is threaded with the auxiliary thread, the aforementioned latch needle 42 can simultaneously hook the main thread on the needle 331 and the auxiliary thread of the left thread hook 57, forming a finer double stitch and improving the stitch strength and aesthetics; when the right thread stop hook 66 participates in the stitch formation, it can play the role of blocking the thread. After the latch needle 42 pulls the thread taut above the fabric, it folds downward, and the thread is blocked by the right thread stop hook 66; after the latch needle 42 completes hooking the thread below the fabric, the right thread stop hook 66 swings, and the thread falls off the right thread stop hook 66, and the final stitch is relatively loose. This mode can be flexibly selected according to different fabrics and thread materials.

[0037] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of the invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the invention, and these improvements and modifications should also be considered within the scope of protection of the invention.

[0038] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. An electrically controlled needle holder oscillation transmission device for a pattern sewing machine, characterized in that, include: A machine head (1) is hollow inside and forms a machine head cavity (11); a machine base (2) is fixedly installed below the machine head (1); a main spindle needle bar unit (3) includes a main motor (31), a main drive shaft (32) and a needle bar (33) connected to the front end of the main drive shaft (32). The main motor (31) drives the main drive shaft (32) to rotate, and the main drive shaft (32) can drive the needle bar (33) to move up and down reciprocally. A needle (331) is also provided on the needle bar (33); a tongue needle drive unit (4) includes a lower main shaft (41) and a tongue needle (42). The lower main shaft (41) is connected to the main drive shaft (32) of the main spindle needle bar unit (3) and can rotate under the drive of the main drive shaft (32). Furthermore, the lower spindle (41) can drive the latch needle (42) to achieve compound motion in the front-back and up-down directions under the transmission of the power transmission component inside the latch needle drive unit (4); a left winding hook assembly (5) and a right blocking hook assembly (6), the left winding hook assembly (5) and the right blocking hook assembly (6) are connected to the spindle needle bar unit (3) and are driven by the main drive shaft (32) to swing back and forth around the needle (331), and the left winding hook assembly (5) and the right blocking hook assembly (6) can selectively participate in the winding and knotting action of the latch needle (42) and the needle (331); an upper feeding system (7) and a lower feeding system (8), the upper feeding system (7) and the lower feeding system (8) cooperate to realize the pattern feeding of sewing material to the needle (331).

2. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 1, characterized in that: The main shaft needle bar unit (3) also includes a main synchronous pulley (34) fixed on the end of the main power shaft (32) away from the tail end of the needle bar (33). The main synchronous pulley (34) is connected to the motor synchronous pulley (311) on the output shaft of the main motor (31) via a main synchronous belt (341). A needle bar crank (35) is also installed at the front end of the main power shaft (32) near the needle bar (33). A needle bar connector (36) is provided at the middle of the needle bar (33). The needle bar crank (35) is connected to the needle bar connector (36) via a needle bar connecting rod (37). A needle bar connecting rod pin (371) is provided on the needle bar connecting rod (37) for hinge connection with the needle bar crank (35), thereby realizing the transmission connection between the main power shaft (32) and the needle bar (33).

3. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 1, characterized in that: The base (2) has a hollow base platform (21) in the middle, and a base head (22) for mounting shoes is formed at the front end of the base (2). A needle plate (23) is also provided above the base head (22). The needle plate (23) is provided with a thread stop plate (231) and a side block (232). The thread stop plate (231) is used to participate in the winding and knotting action of the tongue needle (42) and the needle (331), and the side block (232) is used to position the sewing material.

4. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 1, characterized in that: The needle drive unit (4) is disposed in the base (2) and includes a needle power input component (43), a needle up-and-down swing drive component (44), a needle forward-and-backward motion drive component (45), and a needle linkage component (46). A needle rod (47) is mounted on the needle (42). The needle up-and-down swing drive component (44) and the needle linkage component (46) are both connected to the needle rod (47) for transmission, thereby driving the needle (42) to perform compound movements in the forward-and-backward and up-and-down directions. The needle power input component (43) is connected to the drive shaft (32) on the main spindle rod unit (3) and can drive the drive shaft (32) to perform compound movements in the forward-and-backward and up-and-down directions. The force is transmitted to the lower main shaft (41). The tongue needle power input assembly (43) includes a tongue needle upper synchronous belt pulley (431) fixedly mounted on the active power shaft (32) and a tongue needle lower synchronous belt pulley (432) fixed on the lower main shaft (41). The tongue needle upper synchronous belt pulley (431) and the tongue needle lower synchronous belt pulley (432) are connected by a tongue needle synchronous belt (433) to realize power transmission. The tongue needle up and down swing drive assembly (44) is used to convert the rotational motion of the lower main shaft (41) into the up and down reciprocating motion of the tongue needle (42). The tongue needle up and down swing drive assembly (44) includes a tongue needle up and down action cam (441), a tongue needle up and down action roller (442), and a tongue needle. The device comprises a needle-up / down rocker arm (443), a needle-up / down swing shaft (444), and a needle-up / down swing bracket (445). The needle-up / down cam (441) is fitted at the front end of the lower main shaft (41). The needle-up / down roller (442) is fitted in the track groove of the needle-up / down cam (441), and is fixedly connected to the lower end of the needle-up / down rocker arm (443) via a needle-up / down roller pin (4421). One end of the needle-up / down swing shaft (444) along its length is fixedly connected to the upper output end of the needle-up / down rocker arm (443). (443) Driven by the roller (442), the tongue needle swing shaft (444) is able to swing. A swing shaft bracket (4441) and a swing shaft copper sleeve (4442) are also provided on the tongue needle swing shaft (444). The swing shaft bracket (4441) can be installed on the base (2) and realize the movement limit of the tongue needle swing shaft (444) body. The tongue needle swing frame (445) is installed at the end of the tongue needle swing shaft (444) in the length direction away from the tongue needle swing rocker arm (443). The tongue needle rod (47) passes through the tongue needle swing frame (445) and is fixedly connected to it.

5. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 4, characterized in that: The tongue needle forward and backward movement drive assembly (45) includes a power arc gear (451), a gear shaft (452), a driving arc gear (453), a driven arc gear (454), an arc gear bracket (455), a crank shaft (456), and a tongue needle forward and backward movement crank (457). The power arc gear (451) is fixedly mounted on the lower main shaft (41), while the gear shaft (452) extends vertically, and the gear portion at the bottom of the gear shaft (452) meshes with the power arc gear (451). The arc gear bracket (455) is positioned above the power arc gear (451) and is fixedly connected to the base (2). The gear shaft (452) passes upward through the bottom panel of the arc gear bracket (455) and rotates with the arc gear bracket (455) via a bearing. Both the driving arc gear (453) and the driven arc gear (454) are located within the inner cavity of the arc gear bracket (455), while the driving arc gear (453) is fixedly mounted on the top end of the gear shaft (452). At this location, the passive arc gear (454) is horizontally positioned and meshes with the driving arc gear (453). The crankshaft (456) passes through the left and right side panels of the arc gear bracket (455) and is rotatably connected to the arc gear bracket (455) via two bearings. A crank gear bracket fixing washer (4551) for axially positioning the crankshaft (456) is also provided on the arc gear bracket (455). The shaft of the crankshaft (456)... The passive arc gear (454) passes through and is fixedly installed with the passive arc gear (454). The passive arc gear (454) can drive the crank shaft (456) to rotate back and forth. The forward and backward movement crank (457) of the tongue needle is installed on the crank shaft (456). The forward and backward movement crank (457) of the tongue needle is connected to the tongue needle linkage assembly (46) through an eccentric pin (4571). A tongue needle shank chuck (471) is provided at the middle position of the tongue needle shank (47).The tongue needle drive unit (4) includes a tongue needle linkage assembly (46) comprising a linkage rod (461), a front rod end bearing (462), and a rear rod end bearing (463). The rear rod end bearing (463) is fitted together with an eccentric pin (4571) mounted on the tongue needle front and rear movement crank (457). The rear end of the linkage rod (461) is fixedly connected to the threaded end of the rear rod end bearing (463), while the front end of the linkage rod (461) is fixedly connected to the threaded end of the front rod end bearing (462). The front rod end bearing (462) and the tongue needle rod chuck (471) are connected by a linkage block (464), thereby achieving a transmission connection between the tongue needle front and rear movement crank (457) and the tongue needle rod (47), enabling the tongue needle front and rear movement drive assembly (45) to drive the tongue needle (42) to reciprocate in the front and rear directions.

6. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 4, characterized in that: A needle seat (421) is provided on the needle (42) of the needle driving unit (4). The needle seat (421) is fixedly connected to the needle rod (47). A left needle seat guide block (422) and a right needle seat guide block (423) are respectively provided on the left and right sides of the needle seat (421). The left needle seat guide block (422) and the right needle seat guide block (423) are arranged opposite to each other. (423) Both are provided with long grooves extending in the horizontal direction and are fixedly installed at the top position of the machine head (22) of the machine base (2) by fasteners installed in the long grooves. The long grooves can realize the adjustment of the installation position of the left tongue needle seat guide block (422) and the right tongue needle seat guide block (423), thereby adjusting the position of the tongue needle seat (421) and the tongue needle (42) to adjust the distance between the tongue needle (42) and the machine needle (331) to adapt to different winding and knotting requirements.

7. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 1, characterized in that: The left winding hook assembly (5) includes a left winding hook cam (51) fixedly mounted on the drive shaft (32), a left roller (52), a left winding hook cam swing arm (53), a fulcrum shaft (54), a left winding hook rocker arm clamping block (55), a left winding hook rocker arm (56), and a left winding hook (57); wherein, when the drive shaft (32) rotates, the left winding hook cam (51) moves accordingly, and the left winding hook cam (57)... 1) An annular left winding hook cam mating groove (511) is provided inside. The left roller (52) is mated and installed in the left winding hook cam mating groove (511). The left winding hook cam (51) can drive the left roller (52) to swing back and forth. The left roller (52) is hinged to one end of the left winding hook cam swing arm (53) by a left roller pin (521). The swing of the left roller (52) will drive the entire left winding hook cam swing arm. (53) The movement of the fulcrum shaft (54) is such that one end of the fulcrum shaft (54) along its length is fixed to the other end of the left winding hook cam swing arm (53) away from the left roller (52), and the left winding hook rocker arm clamping block (55) is fixed to the other end of the fulcrum shaft (54) along its length, and the left winding hook rocker arm clamping block (55) is linked with the fulcrum shaft (54), and the left winding hook rocker arm (56) is fixedly connected to the left winding hook rocker arm. The arm clamping block (55) is located below the arm clamping block (55) and can swing back and forth under the drive of the fulcrum shaft (54). The left winding hook (57) is fixedly installed on the left winding hook rocker arm (56) through a left winding hook shaft (571). The left winding hook (57) and the left winding hook shaft (571) swing together with the left winding hook rocker arm clamping block (55). The left winding hook (57) can cooperate with the winding and knotting action of the tongue needle (42) and the needle (331).

8. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 7, characterized in that: The right line stop hook assembly (6) includes a right line stop hook cam (61), a right roller (62), a right line stop hook cam swing arm (63), a right line stop hook rocker arm clamping block (64), a right line stop hook rocker arm (65), and a right line stop hook (66); wherein, when the drive shaft (32) rotates, the right line stop hook cam (61) moves accordingly, and the right line stop hook cam (61) is also provided with an annular right line stop hook cam mating groove (611), and the right roller (62) is mated and installed. The right stop hook cam is located in the groove (611) of the right stop hook cam, and the right stop hook cam (61) can drive the right roller (62) to swing back and forth. The right roller (62) is hinged to one end of the right stop hook cam swing arm (63) by a right roller pin (621). The swing of the right roller (62) will drive the movement of the entire right stop hook cam swing arm (63). The end of the right stop hook cam swing arm (63) away from the right roller (62) is fixedly mounted on the pivot shaft (54). At the middle position of the body, a pivot sleeve (541) is also fitted on the shaft of the pivot shaft (54). The two axial ends of the pivot sleeve (541) are respectively limited by the left winding hook rocker arm clamping block (55) and the retaining ring. The right winding hook rocker arm clamping block (64) is fixed to the pivot shaft (54) near the end of the right winding hook cam swing arm (63). The right winding hook rocker arm clamping block (64) can swing back and forth under the drive of the pivot sleeve (541). The right line stop hook rocker arm (65) is fixedly connected to the lower position of the right line stop hook rocker arm clamping block (64), while the right line stop hook (66) is fixedly installed at the front end of the right line stop hook rocker arm (65) through a right line stop hook shaft (661). The right line stop hook (66) swings together with the right line stop hook rocker arm clamping block (64), and the right line stop hook (66) can cooperate with the left winding hook (57) to complete the winding and knotting action of the tongue needle (42) and the needle (331).

9. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 1, characterized in that: The upper feeding system (7) is located at the front end of the machine head (1) and includes a pressing drive assembly (71), an upper feeding roller assembly (72), and an upper feeding power assembly (73). The pressing drive assembly (71) includes a cylinder (711), a piston (712) connected to the cylinder (711), a pressing rod (713) connected to the lower end of the piston (712), a pressing spring (714), and a pressing rod guide block (715) through which the pressing rod (713) passes and is movable. The cylinder (711) is located on the machine head (1), and the pressing rod (713) is guided by the pressing rod guide block (715) passing through it. A spring (714) is sleeved on the outer circle of the pressing rod (713), thereby providing elastic pressure to the upper feed roller assembly (72) to press the sewn fabric. The cylinder (711) is configured to drive the piston (712) to lift the pressing rod (713) and the entire upper feed roller assembly (72) after gas is introduced, so as to put in or take out the sewn fabric. The upper feed roller assembly (72) includes an upper feed roller (721), an upper feed roller mounting bracket (722) sleeved on the upper feed roller (721), an upper feed roller connecting bracket (723), an upper feed roller deflector block (724), and a deflector block compression spring (725). The upper feed roller mounting bracket (722) and the upper feed roller connecting bracket (723) are connected to the upper feed roller assembly (724). The upper feeding roller connecting frame (723) is fixedly connected. The upper feeding roller steering block (724) is movably fitted onto the lower end of the clamping rod (713). The upper feeding roller connecting frame (723) is connected to the upper feeding roller steering block (724). The steering block compression spring (725) abuts against the lower position of the feeding roller steering block (724) and provides a steering and restoring force to the feeding roller steering block (724). The steering block compression spring (725) is limited by a fixed washer (7251) located below it. The cylinder (711) of the clamping drive assembly (71) can drive the upper feeding roller through the movement of the piston (712). 721) Move up and down; and the upper feeding power assembly (73) includes an upper feeding motor (731) and an upper feeding motor bracket (732) for fixing the upper feeding motor (731). The upper feeding motor bracket (732) is fixedly installed on the machine head (1), and the drive shaft of the upper feeding motor (731) is connected to the upper feeding roller mounting bracket (722) of the upper feeding roller assembly (72) through a universal connecting rod (733), so that the upper feeding motor (731) can drive the upper feeding roller (721) to rotate. The upper feeding roller (721) can cooperate with the lower feeding system (8) to realize the feeding action according to the pattern requirements.

10. The electrically controlled needle holder swing transmission device for a pattern sewing machine according to claim 1, characterized in that: The lower feeding system (8) is installed in the machine base (2) and can cooperate with the upper feeding roller assembly (72) to realize patterned feeding; the lower feeding system (8) includes a lower feeding power assembly (81), a lower feeding transmission assembly (82), and a gear ring assembly (83); wherein, the lower feeding power assembly (81) includes a feeding gear ring motor (811) and a feeding gear ring transmission shaft (812), and the power output shaft of the feeding gear ring motor (811) is connected to the feeding gear ring. One end of the drive shaft (812) along its length is connected to the drive shaft via a connecting bushing (813). The lower feeding drive assembly (82) includes a lower feeding drive gear (821), a lower feeding driven gear (822), and a long toothed shaft (823) that are sequentially connected to the feeding gear ring drive shaft (812). The long toothed shaft (823) is rotatably supported on a gear bracket (824) via a long toothed shaft bearing (8231). The gear ring assembly (812) 3) Includes a lower feeding gear ring (831) and a gear ring support plate (832). The lower feeding gear ring (831) meshes with the long gear shaft (823) of the lower feeding transmission assembly (82). The gear ring support plate (832) is fixedly installed in the machine base (2), and the lower feeding gear ring (831) is rotatably supported on the gear ring support plate (832). A support plate notch is provided on the gear ring support plate (832) to make way for the tongue needle (42). The power output by the feeding gear motor (811) is transmitted sequentially through the connecting bushing (813), the feeding gear transmission shaft (812), the lower feeding drive gear (821), the lower feeding driven gear (822), and the long gear shaft (823), ultimately driving the lower feeding gear (831) to rotate. The lower feeding gear (831) and the upper feeding roller (721) work together under the independent control of their respective motors to sew patterned stitches.

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