Double-needle computerized embroidery machine

Abstract

The invention relates to a double-needle computerized embroidery machine. Relates to the technical field of embroidery machines. The double-needle sewing machine specifically comprises a machine shell, a single needle rod presser foot driving mechanism, a single upper thread clamping mechanism, a single thread hooking mechanism, a shuttle box body, a single thread buckling mechanism and a single thread trimming mechanism, the single needle rod presser foot driving mechanism, the single upper thread clamping mechanism and the single thread hooking mechanism are arranged on the machine shell, the shuttle box body is arranged below the machine shell, and the single thread buckling mechanism and the single thread trimming mechanism are arranged on the shuttle box body. The single upper thread clamping mechanism clamps double-needle upper threads at the same time, the single thread hooking mechanism hooks the threads of the double needles at the same time, the single thread buckling mechanism buckles the threads of the double needles at the same time, and the single thread trimming mechanism trims the threads of the double needles at the same time. Therefore, the space occupied by the needle bar presser foot driving mechanism, the upper thread clamping mechanism, the thread hooking mechanism, the thread buckling mechanism and the thread trimming mechanism can be reduced, meanwhile, the synchronism of double-needle stitch thread trimming actions is improved, the structure of the double-needle computerized embroidery machine is more compact, and the space utilization rate and the embroidery quality of the double-needle computerized embroidery machine are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of embroidery machines, in particular to a double-needle computerized embroidery machine. Background Art

[0002] With the development of the industry, the market's requirements for embroidery products and efficiency are becoming increasingly higher, and double-needle computerized embroidery machines are becoming increasingly widely used. Double-needle computerized embroidery machines are professional embroidery equipment that combines double-needle technology with computer automation control. Through double-needle synchronous sewing and digital programming, they achieve high-precision and high-efficiency decorative embroidery craftsmanship.

[0003] In a double-needle computer embroidery machine, a needle bar and presser foot driving mechanism, a thread hooking mechanism, a thread buckling mechanism and a thread cutting mechanism are usually provided. The needle bar and presser foot driving mechanism and the thread hooking mechanism are arranged in the casing of the double-needle computer embroidery machine, and the thread buckling mechanism and the thread cutting mechanism are arranged on the shuttle box body of the double-needle computer embroidery machine.

[0004] Since the double-needle computer embroidery machine forms two parallel stitches with a fixed spacing by two parallel needles and the corresponding shuttle head, the existing double-needle computer embroidery machine's needle bar presser foot drive mechanism, thread hooking mechanism, thread buckling mechanism and thread cutting mechanism usually include two independent units, which correspond to the needle bar presser foot drive, thread hooking, thread buckling and thread cutting of the double needle surface thread respectively.

[0005] However, the two independent units of the needle bar presser foot drive mechanism, the thread hook mechanism, the thread buckle mechanism and the thread trimming mechanism occupy a large space and have poor synchronization, which not only leads to poor space utilization of the double-needle computer embroidery machine, increases the size of the double-needle computer embroidery machine, but also affects the embroidery quality of the double-needle computer embroidery machine. Summary of the Invention

[0006] The purpose of the present invention is to provide a double-needle computer embroidery machine to address the deficiencies of the above-mentioned prior art, which can reduce the space occupied by the needle bar and presser foot driving mechanism, the thread hooking mechanism, the thread buckling mechanism and the thread cutting mechanism, and at the same time improve the synchronization of the actions of the needle bar and presser foot driving mechanism, the thread hooking mechanism, the thread buckling mechanism and the thread cutting mechanism, thereby making the structure of the double-needle computer embroidery machine more compact and improving the space utilization and embroidery quality of the double-needle computer embroidery machine.

[0007] The present invention proposes a double-needle computer embroidery machine, comprising a head component and a shuttle box component, wherein the shuttle box component is arranged below the head component; the head component comprises a casing, and a single needle bar and presser foot driving mechanism and a single thread hooking mechanism arranged on the casing; the shuttle box component comprises a shuttle box body arranged below the casing, and a single thread buckling mechanism and a single thread cutting mechanism arranged on the shuttle box body; the single needle bar and presser foot driving mechanism simultaneously drives the needle bar and presser foot of the double needles to reciprocate up and down, the single thread hooking mechanism simultaneously hooks the upper thread of the double needles, the single thread buckling mechanism simultaneously buckles the upper thread of the double needles, and the single thread cutting mechanism simultaneously cuts the upper thread of the double needles.

[0008] Furthermore, the needle bar presser foot drive mechanism includes two guide rods vertically spaced apart in the casing, two needle bar drivers respectively provided on the two guide rods, two presser foot drivers respectively provided on the two guide rods, two presser foot follower assemblies connecting the needle bar driver and the presser foot driver on the same guide rod, a driven shaft connecting the two presser foot follower assemblies, and a needle bar active assembly that simultaneously drives the two needle bar drivers to reciprocate up and down along the two guide rods.

[0009] Furthermore, the needle bar active assembly includes a driving shaft that passes through the housing horizontally, a driving cam assembly arranged on the driving shaft, a three-eye connecting rod assembly connected to the driving cam assembly, and two driving connecting rods, one end of which is connected to the three-eye connecting rod assembly and the other end is connected to the needle bar driver.

[0010] Furthermore, the presser foot follower assembly includes a first follower link, a second follower link having one end connected to the needle bar driver and the other end connected to the middle of the first follower link, and a third follower link having one end connected to the presser foot driver and the other end connected to one end of the first follower link, and the driven shaft connects the other ends of the two first follower links.

[0011] Furthermore, the wire hooking mechanism includes a flat wire hooking bracket fixedly connected to the bottom of the casing, a flat wire hooking cover provided on the flat wire hooking bracket, two hook knives arranged in parallel and spaced apart between the flat wire hooking bracket and the flat wire hooking cover, a hook knife connector connecting the two hook knives, and a hook knife drive assembly connected to the hook knife connector, one end of the hook knife extending outside the flat wire hooking bracket and the flat wire hooking cover.

[0012] Furthermore, the flat wire hook cover is provided with two wire hook guide holes arranged in parallel and at intervals, the hook knife is provided with a sliding column that passes through the wire hook guide hole and slides with the wire hook guide hole, one end of the hook knife connecting piece is connected to the sliding column of one hook knife, and the other end is connected to the sliding column of the other hook knife; the flat wire hook cover is also provided with a slide groove, the slide groove is arranged between the two wire hook guide holes and is arranged parallel to the two wire hook guide holes, and the top of the hook knife connecting piece is provided with a slider that slides with the slide groove.

[0013] Furthermore, a connecting column is provided at the bottom of the hook knife connecting piece, and the hook knife driving assembly includes a rotating shaft fixed on the flat wire hooking bracket, an upper wire hooking fork and a lower wire hooking fork which are rotatably connected to the rotating shaft at least in sequence, and a wire hooking pull rod which extends laterally and can move laterally in a straight line. One end of the upper wire hooking fork is connected to the wire hooking pull rod, and the other end is connected to the lower wire hooking fork. A strip hole is provided at the end of the lower wire hooking fork, and the connecting column is inserted into the strip hole, and the strip hole is slidably fitted.

[0014] Furthermore, the thread-locking mechanism includes a thread-locking mounting plate fixedly connected to the shuttle box body, a thread-locking driving assembly fixedly connected to the thread-locking mounting plate, a thread-locking guide assembly fixedly connected to the thread-locking mounting plate, and a thread-locking assembly symmetrically provided with two thread-locking forks; the upper fulcrum at the bottom of the thread-locking assembly is connected to the thread-locking driving assembly, the lower fulcrum at the bottom of the thread-locking assembly is connected to the thread-locking guide assembly, the thread-locking driving assembly is used to drive the thread-locking assembly to swing around the lower fulcrum, and the thread-locking guide assembly limits the swing of the thread-locking assembly around the lower fulcrum.

[0015] Furthermore, the wire-binding drive assembly includes a wire-binding driver and a drive mounting seat, the upper fulcrum at the bottom of the wire-binding mechanism is connected to the wire-binding driver, the wire-binding driver is arranged on the drive mounting seat, and the drive mounting seat is fixedly connected to the wire-binding mounting plate.

[0016] Furthermore, the buckle wire guide assembly includes a buckle wire guide seat and a buckle wire guide plate arranged on both sides of the buckle wire assembly, a guide pad arranged between the buckle wire guide seat and the buckle wire guide plate, and a guide connecting member connecting the buckle wire guide seat, the buckle wire guide plate and the guide pad to the buckle wire mounting plate. The buckle wire guide seat, the guide pad and the buckle wire guide plate are combined to form a buckle wire guide hole. The lower fulcrum of the bottom of the buckle wire assembly is connected to the buckle wire guide seat, and the top passes through the buckle wire guide hole.

[0017] Furthermore, the buckle wire assembly also includes two symmetrically arranged buckle wire bodies, and a buckle wire connecting rod having one end rotatably connected to the middle part of the two buckle wire bodies and the other end rotatably connected to the buckle wire driving assembly. The two buckle wire forks are respectively arranged on the top of the two buckle wire bodies, and the bottom of the two buckle wire bodies is rotatably connected to the buckle wire guide assembly. The upper fulcrum is the connection point of the buckle wire connecting rod and the buckle wire driving assembly, and the lower fulcrum is the connection point of the two buckle wire bodies and the buckle wire guide assembly.

[0018] Furthermore, the thread trimming mechanism includes a thread trimming rod, a thread trimming connecting rod assembly, a first scissors assembly and a second scissors assembly. The thread trimming rod extends laterally and can move laterally linearly. The first scissors assembly and the second scissors assembly are arranged side by side laterally. The first end of the thread trimming connecting rod assembly is fixedly connected to the thread trimming rod, the second end is fixedly connected to the first scissors assembly, and the third end is connected to the second scissors assembly, so that the first scissors assembly and the second scissors assembly can be driven to cut the thread simultaneously during the laterally linear movement of the thread trimming rod.

[0019] Furthermore, the wire trimmer link assembly includes a connecting seat fixedly connected to the wire trimmer rod, a first link fixedly connected to the first scissors assembly, a second link fixedly connected to the second scissors assembly, a third link rotatably connected to the connecting seat at one end and rotatably connected to the first link at the other end, and a fourth link rotatably connected to the first link at one end and rotatably connected to the second link at the other end, wherein the first link and the second link are arranged in parallel and spaced apart.

[0020] Furthermore, the thread trimming mechanism also includes a thread trimming fixing seat arranged in parallel with the crossbeam of the shuttle box body in the horizontal direction, a pull rod bracket with one end fixedly connected to the thread trimming fixing seat and the other end extending in a direction away from the thread trimming fixing seat, and a thread trimming return spring mounted on the thread trimming pull rod. The first scissors assembly is arranged on the thread trimming fixing seat, and the second scissors assembly is arranged on the crossbeam of the shuttle box body. The end of the pull rod bracket extending in a direction away from the thread trimming fixing seat is movably connected to the thread trimming pull rod, and one end of the thread trimming return spring abuts against the pull rod bracket and the other end abuts against the thread trimming connecting rod assembly.

[0021] Furthermore, the first scissors assembly includes a first fixed knife fixedly mounted on the top of the thread trimmer fixing seat, a first driving shaft vertically penetrating the thread trimmer fixing seat and rotatably connected to the thread trimmer fixing seat, and a first movable knife provided at the top of the first driving shaft, and the first connecting rod is fixedly connected to the bottom of the first driving shaft; the second scissors assembly includes a second fixed knife fixedly mounted on the top of the crossbeam of the shuttle box body, a second driving shaft vertically penetrating the crossbeam of the shuttle box body and rotatably connected to the crossbeam of the shuttle box body, and a second movable knife provided at the top of the second driving shaft, and the second connecting rod is fixedly connected to the bottom of the second driving shaft.

[0022] The double-needle computer embroidery machine proposed by the present invention has the following beneficial effects: (1) The single needle bar and presser foot driving mechanism of the embroidery machine simultaneously drives the needle bar and presser foot of the double needle to move up and down, the single thread hooking mechanism simultaneously hooks the upper thread of the double needle, the single thread buckling mechanism simultaneously buckles the upper thread of the double needle, and the single thread cutting mechanism simultaneously cuts the upper thread of the double needle, thereby reducing the space occupied by the needle bar and presser foot driving mechanism, the thread hooking mechanism, the thread buckling mechanism and the thread cutting mechanism, and at the same time improving the synchronization of the actions of the needle bar and presser foot driving mechanism, the thread hooking mechanism, the thread buckling mechanism and the thread cutting mechanism, thereby making the structure of the double needle computer embroidery machine more compact, and improving the space utilization rate and embroidery quality of the double needle computer embroidery machine; (2) The needle bar presser foot drive mechanism of the embroidery machine includes two presser foot driven assemblies, which respectively connect the needle bar drivers on the two guide rods with the presser foot drivers. Therefore, when the two needle bar drivers move up and down along their respective guide rods, the two presser foot drivers are driven to move up and down along their respective guide rods, thereby driving the two presser feet of the machine head component to move up and down synchronously, thereby realizing that a single needle bar presser foot drive mechanism drives the needle bar and presser foot of the double needle to move up and down simultaneously; (3) The driven shaft of the embroidery machine connects the two presser foot driven assemblies. Therefore, when the two presser foot driven assemblies drive the two presser foot drivers to move up and down along their respective guide rods, the driven shaft not only improves the synchronization of the movement of the two presser foot drivers, but also improves the stability of the movement of the two presser foot drivers, thereby further improving the synchronization and stability of the needle bar presser foot drive mechanism, thereby improving the embroidery quality of the double-needle computerized embroidery machine; (4) The hooking mechanism of the embroidery machine also includes a hook knife connecting member and a hook knife driving assembly. The hook knife connecting member connects the two hook knives, and the hook knife driving assembly is connected to the hook knife connecting member. The hook knife driving assembly drives the hook knife connecting member to move, and the hook knife connecting member drives the two hook knives to move synchronously, so that the hook knife heads of the two inclined hook knives can respectively hook the upper threads of the two needle bars, thereby realizing that a single hooking mechanism can hook the upper threads of the two needles at the same time; (5) The thread-locking mechanism of the embroidery machine includes a thread-locking assembly, on which two thread-locking forks are symmetrically arranged. Therefore, when the thread-locking driving assembly drives the thread-locking assembly to swing around the lower fulcrum, the thread-locking assembly can simultaneously lock and release the upper threads of the double needles through the two thread-locking forks symmetrically arranged thereon, thereby realizing that a single thread-locking mechanism can lock and release the upper threads of the double needles at the same time; (6) The thread trimming mechanism of the embroidery machine also includes a thread trimming connecting rod assembly, the first end of the thread trimming connecting rod assembly is fixedly connected to the thread trimming pull rod, the second end is fixedly connected to the first scissors assembly, and the third end is fixedly connected to the second scissors assembly. When the thread trimming pull rod moves laterally and linearly, the thread trimming connecting rod assembly drives the first scissors assembly and the second scissors assembly to perform thread trimming synchronously, thereby realizing that a single thread trimming mechanism can trim the upper threads of the double needles at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In the drawings, like reference numerals are used to represent like elements.

[0024] Figure 1 This is a structural diagram of a double-needle computerized embroidery machine in which two head components correspond to one shuttle box component according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a head component of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram of a shuttle box component of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 4 This is a structural schematic diagram of a needle pressure rod driving mechanism of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 5 This is a structural schematic diagram of a needle bar active component of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 6 This is a structural schematic diagram of a double-needle computerized embroidery machine in which a driven shaft is connected to two presser foot driven assemblies according to an embodiment of the present invention; Figure 7 This is a structural schematic diagram of a thread hooking mechanism of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 8 This is a structural schematic diagram of a hook knife drive assembly of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 9 This is a structural schematic diagram of two thread-fastening mechanisms of a double-needle computerized embroidery machine provided on a shuttle box body according to an embodiment of the present invention; Figure 10 This is a structural schematic diagram of a thread-fastening mechanism of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 11 This is a structural schematic diagram of a thread-locking drive assembly of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 12 This is a structural schematic diagram of a thread guide assembly of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 13 This is a structural schematic diagram of a thread buckle assembly of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 14 This is a structural schematic diagram of two thread trimming mechanisms of a double-needle computerized embroidery machine provided on a shuttle box body according to an embodiment of the present invention; Figure 15 This is a structural schematic diagram of a thread trimming mechanism of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 16 This is a structural schematic diagram of a thread trimmer connecting rod assembly of a double-needle computerized embroidery machine according to an embodiment of the present invention; Figure 17 This is a structural schematic diagram of a first scissor assembly of a double-needle computerized embroidery machine arranged on a thread trimmer fixing seat according to an embodiment of the present invention; Figure 18 This is a structural schematic diagram of a double-needle computerized embroidery machine in which a second scissor assembly is arranged on a crossbeam of a shuttle box body according to an embodiment of the present invention.

[0025] In the figure: 1. Housing; 2. Needle bar presser foot drive mechanism; 21. Guide rod; 22. Needle bar drive; 23. Presser foot drive; 24. Presser foot driven assembly; 241. First driven connecting rod; 242. Second driven connecting rod; 243. Third driven connecting rod; 25. Driven shaft; 26. Needle bar driving assembly; 261. Driving cam assembly; 262. Three-eye connecting rod assembly; 263. Driving connecting rod; 27. Presser foot guide seat; 3. Thread hook mechanism; 31. Flat hook Thread support; 32, flat hook cover; 321, hook guide hole; 322, slide; 33, hook knife; 331, sliding column; 34, hook knife connecting piece; 341, slider; 342, connecting column; 35, hook knife drive assembly; 351, rotating shaft; 352, hook line shift fork; 353, hook line shift fork; 3531, strip hole; 4, shuttle box; 41, crossbeam; 5, thread buckling mechanism; 51, thread buckling mounting plate; 52, thread buckling drive assembly; 521, buckling Wire drive; 522, drive mounting seat; 53, thread guide assembly; 531, thread guide seat; 532, thread guide plate; 533, guide pad; 534, thread guide hole; 535, guide connector; 54, thread assembly; 541, thread fork; 542, thread body; 543, thread connecting rod; 6, thread trimming mechanism; 61, thread trimming rod; 62, thread trimming connecting rod assembly; 621, connecting seat; 622, first connecting rod; 623, second connecting rod Rod; 624, third connecting rod; 625, fourth connecting rod; 63, first scissors assembly; 631, first fixed knife; 632, first movable knife; 633, first drive shaft; 634, first bearing sleeve; 64, second scissors assembly; 641, second fixed knife; 642, second movable knife; 643, second drive shaft; 644, second bearing sleeve; 65, thread trimmer fixing seat; 66, pull rod bracket; 661, collar; 67, thread trimmer return spring; 68, thread trimmer guide seat. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] See also Figures 1 to 18 A double-needle computer embroidery machine according to an embodiment of the present invention includes a casing 1, a single needle bar and presser foot driving mechanism 2, a single thread hooking mechanism 3, a shuttle box body 4, a single thread holding mechanism 5 and a single thread cutting mechanism 6, wherein the single needle bar and presser foot driving mechanism 2 and the single thread holding mechanism 3 are arranged on the casing 1 to form a head component of the double-needle computer embroidery machine; the single thread holding mechanism 5 and the single thread cutting mechanism 6 are arranged on the shuttle box body 4 to form a shuttle box component of the double-needle computer embroidery machine.

[0028] In actual application, a double-needle computer embroidery machine usually has multiple machines working at the same time, that is, multiple machine head parts are set on the crossbeam of the frame, an embroidery frame is set below the machine head parts, and multiple shuttle box parts are set side by side along the horizontal direction below the embroidery frame. The number of shuttle box parts does not necessarily correspond to the number of machine head parts. Figure 1 Taking the example shown, one shuttle box component corresponds to two machine head components, each machine head component includes a housing 1 and two embroidery needles, and each shuttle box component includes a shuttle box body 4. Therefore, each housing 1 is provided with a needle bar presser foot drive mechanism 2 and a thread hooking mechanism 3, and each shuttle box body 4 is provided with two thread buckling mechanisms 5, two thread cutting mechanisms 6 and four rotary hooks.

[0029] A single needle bar presser foot driving mechanism 2 is provided on each casing 1, which is used for driving the needle bar presser foot of a single double-needle machine head component; a single thread hooking mechanism 3 is provided on each casing 1, which is used for hooking the thread of a single double-needle machine head component; two thread buckling mechanisms 5 are provided on each shuttle box body 4, which correspond to the thread buckling of two double-needle machine head components respectively; two thread trimming mechanisms 6 are provided on each shuttle box body 4, which correspond to the thread trimming of two double-needle machine head components respectively.

[0030] Therefore, the space occupied by the needle bar presser foot driving mechanism 2, the thread hooking mechanism 3, the thread buckling mechanism 5 and the thread cutting mechanism 6 can be reduced, and at the same time, the synchronization of the actions of the needle bar presser foot driving mechanism 2, the thread hooking mechanism 3, the thread buckling mechanism 5 and the thread cutting mechanism 6 can be improved, thereby making the structure of the double-needle computer embroidery machine more compact and improving the space utilization and embroidery quality of the double-needle computer embroidery machine.

[0031] In this application, the thread cutting principle of the double-needle computer embroidery machine is as follows: during the operation of the embroidery machine, when the embroidery work of a certain color of the upper thread is completed and the color needs to be changed, or when the embroidery of a part of the pattern is completed and the embroidery of the pattern of the next area needs to be started, the thread hooking mechanism 3 and the thread buckling mechanism 5 are operated first, and then the thread cutting mechanism 6 is operated.

[0032] The upper thread of the double needle is hooked by the thread hooking mechanism 3, and the position of the double needle upper thread is fixed so that the subsequent thread cutting mechanism 6 can accurately cut the upper thread of the double needle; the thread holding mechanism 5 cooperates with the rotary hook on the shuttle box body 4 to clamp and fix the double needle upper thread located below the thread holding mechanism and about to be cut, and then the double needle upper thread located above the thread holding mechanism 5 is cut by the thread cutting mechanism 6 to prevent the thread end from retracting and causing the thread to fall off when the thread cutting mechanism 6 completes the cutting of the double needle upper thread, thereby realizing thread cutting of the double needle computerized embroidery machine.

[0033] In this embodiment, the needle bar presser foot drive mechanism 2 includes two guide rods 21, two needle bar drivers 22, two presser foot drivers 23, two presser foot follower assemblies 24, a driven shaft 25 and a needle bar driving assembly 26. The two guide rods 21 are vertically spaced apart in the casing 1, and the two needle bar drivers 22 are respectively arranged on the two guide rods 21, for respectively corresponding to the two needle bar drives of the double-needle machine head component.

[0034] The two presser foot drivers 23 are respectively arranged on the two guide rods 21, and on the same guide rod 21, the presser foot driver 23 is arranged below the needle bar driver 22, and is used to drive the two presser feet corresponding to the double-needle machine head component respectively.

[0035] The two presser foot follower assemblies 24 respectively connect the needle bar driver 22 on the two guide rods 21 with the presser foot driver 23, that is, one presser foot follower assembly 24 connects the needle bar driver 22 on one guide rod 21 with the presser foot driver 23, and the other presser foot follower assembly 24 connects the needle bar driver 22 on the other guide rod 21 with the presser foot driver 23.

[0036] The driven shaft 25 connects the two presser foot driven assemblies 24, and the needle bar active assembly 26 is simultaneously connected to the two needle bar drivers 22 arranged on the two guide rods 21. Therefore, the two needle bar drivers 22 are simultaneously driven by the needle bar active assembly 26 to move up and down along their respective guide rods 21, thereby driving the two needle bars of the double-needle machine head component to move up and down synchronously.

[0037] Since the two presser foot follower assemblies 24 respectively connect the needle bar drivers 22 on the two guide rods 21 with the presser foot driver 23, when the two needle bar drivers 22 move back and forth along their respective guide rods 21, the two presser foot drivers 23 are driven to move back and forth along their respective guide rods 21, thereby driving the two presser feet of the double-needle machine head component to move back and forth synchronously, thereby realizing that a single needle bar presser foot driving mechanism 2 simultaneously drives the needle bar and presser foot of the double-needle machine head component to move back and forth.

[0038] Since in this application, the two presser foot follower assemblies 24 respectively connect the needle bar driver 22 on the two guide rods 21 with the presser foot driver 23, and the driven shaft 25 connects the two presser foot follower assemblies 24, therefore when the two presser foot follower assemblies 24 drive the two presser foot drivers 23 to move up and down along their respective guide rods 21, the driven shaft 25 not only improves the synchronization of the movement of the two presser foot drivers 23, but also improves the stability of the movement of the two presser foot drivers 23, thereby further improving the synchronization and stability of the needle bar presser foot driving mechanism 2, and thus improving the embroidery quality of the double-needle computer embroidery machine.

[0039] Specifically, in this embodiment, the needle bar active component 26 includes a driving shaft, a driving cam component 261, a three-eye connecting rod component 262 and two driving connecting rods 263. The driving shaft passes through the casing 1 horizontally. The driving cam component 261 is arranged on the driving shaft. The three-eye connecting rod component 262 is connected to the driving cam component 261. One end of the two driving connecting rods 263 is connected to the three-eye connecting rod component 262, and the other end is connected to the needle bar driver 22.

[0040] The structures of the driving cam assembly 261 and the three-eye connecting rod assembly 262 refer to the existing technology, wherein the driving cam assembly 261 is generally called a cam four-piece set or simply a four-piece set, and is provided with a cam connecting rod; the three-eye connecting rod assembly 262 includes a three-eye connecting rod, a first-eye pin shaft provided at the head of the three-eye connecting rod, a second-eye pin shaft provided in the middle of the three-eye connecting rod, and a third-eye pin shaft provided at the tail of the three-eye connecting rod.

[0041] The two ends of the first eye pin shaft are respectively connected to the two needle bar drivers 22 through two driving connecting rods 263, the cam connecting rod is rotatably connected to the second eye pin shaft, and the two ends of the third eye pin shaft are rotatably connected to the movable groove on the rear wall of the casing 1. Therefore, the cam connecting rod of the driving cam assembly 261 is driven by the rotation of the active shaft, and the cam connecting rod drives the three-eye connecting rod assembly 262 to move. The three-eye connecting rod assembly 262 drives the two needle bar drivers 22 to move up and down along their respective guide rods 21 through the two driving connecting rods 263, thereby realizing the two needle bar drive of the double-needle machine head component.

[0042] Specifically, in this embodiment, the presser foot follower assembly 24 includes a first follower link 241, a second follower link 242 and a third follower link 243, one end of the second follower link 242 is connected to the needle bar driver 22, and the other end is connected to the middle part of the first follower link 241, one end of the third follower link 243 is connected to the presser foot driver 23, and the other end is connected to the head end of the first follower link 241, so that the needle bar driver 22 and the presser foot driver 23 on the same guide rod 21 are connected through the first follower link 241, the second follower link 242 and the third follower link 243, so that when the needle bar driver 22 reciprocates up and down on the guide rod 21, it drives the presser foot driver 23 to reciprocate up and down on the guide rod 21, thereby realizing the two presser feet drive of the double-needle machine head component.

[0043] The driven shaft 25 connects the tail ends of the two first driven connecting rods 241, thereby connecting the two presser foot driven assemblies 24 through the driven shaft 25, which not only improves the synchronization of the movement of the two presser foot drivers 23, but also improves the stability of the movement of the two presser foot drivers 23, further improves the synchronization and stability of the movement of the needle bar presser foot drive mechanism 2, and thus improves the embroidery quality of the double-needle computerized embroidery machine.

[0044] In this embodiment, the needle bar presser foot drive mechanism 2 further includes a presser foot guide seat 27, which is disposed between the two guide rods 21. Guide grooves are provided on both sides of the presser foot guide seat 27, and rolling bearings are provided on the presser foot driver 23. The rolling bearing on one presser foot driver 23 is in rolling engagement with the guide groove on one side of the presser foot guide seat 27, and the rolling bearing on the other presser foot driver 23 is in rolling engagement with the guide groove on the other side of the presser foot guide seat 27.

[0045] Therefore, when the two presser foot drivers 23 move back and forth up and down on their respective guide rods 21, the movement of the two presser foot drivers 23 on their respective guide rods 21 is guided by the cooperation of the rolling bearings and the guide grooves, thereby making the movement of the two presser foot drivers 23 more stable, further improving the stability of the needle bar presser foot drive mechanism 2, and thus improving the embroidery quality of the double-needle computer embroidery machine.

[0046] In this embodiment, the wire hooking mechanism 3 includes a flat wire hooking bracket 31, a flat wire hooking cover 32 and two hook knives 33. The flat wire hooking bracket 31 is fixedly connected to the bottom of the casing 1, and the flat wire hooking cover 32 is arranged on the flat wire hooking bracket 31. The two hook knives 33 are arranged in parallel and spaced apart between the flat wire hooking bracket 31 and the flat wire hooking cover 32, and one end of the two hook knives 33 extends outside the flat wire hooking bracket 31 and the flat wire hooking cover 32, that is, the hook heads of the two hook knives 33 extend outside the flat wire hooking bracket 31 and the flat wire hooking cover 32.

[0047] In the present application, the thread hooking mechanism 3 further includes a hook knife connector 34 and a hook knife drive assembly 35. The hook knife connector 34 connects the two hook knives 33, and the hook knife drive assembly 35 is connected to the hook knife connector 34. It is foreseeable that: the bottom plane of the housing 1 is an inclined plane, and the flat thread hooking bracket 31 is fixedly connected to the bottom plane of the housing 1, so that the two hook knives 33 are arranged at an angle at the bottom of the housing 1, so that the hook knife drive assembly 35 drives the hook knife connector 34 to move, and the hook knife connector 34 drives the two hook knives 33 to move synchronously, so that the hook heads of the two inclined hook knives 33 can respectively hook the upper threads of the two needle bars, thereby realizing that a single thread hooking mechanism 3 can simultaneously hook the upper threads of the two needles.

[0048] Specifically, in this embodiment, the flat thread hooking cover 32 is provided with two parallel and spaced thread hooking guide holes 321, and the two hook knives 33 are each provided with a sliding post 331 that passes through the thread hooking guide hole 321 and slidably cooperates with the thread hooking guide hole 321. One end of the hook knife connecting member 34 is connected to the sliding post 331 of one hook knife 33, and the other end is connected to the sliding post 331 of the other hook knife 33. Therefore, when the hook knife driving assembly 35 drives the hook knife connecting member 34 to move, the hook knife connecting member 34 drives the two hook knives 33 to move linearly along the two thread hooking guide holes 321 respectively. The sliding post 331 slidably cooperates with the thread hooking guide hole 321, making the linear movement of the two hook knives 33 more stable, thereby making the action of the thread hooking mechanism 3 more stable, thereby improving the embroidery quality of the double-needle computerized embroidery machine. In the present application, a slide groove 322 is further provided on the flat thread hook cover 32, and the slide groove 322 is arranged between the two thread hook guide holes 321 and parallel to the two thread hook guide holes 321. A slider 341 that slides with the slide groove 322 is provided on the top of the hook knife connector 34, so that when the hook knife driving assembly 35 moves, the hook knife connector 34 is driven to move in a straight line along the slide groove 322, and then the two hook knives 33 are driven to move in a straight line along the two thread hook guide holes 321 respectively through the hook knife connector 34, and the slider 341 slides with the slide groove 322, so that the linear movement of the hook knife connector 34 is more stable, thereby making the action of the thread hook mechanism 3 more stable, thereby improving the embroidery quality of the double-needle computer embroidery machine.

[0049] Specifically, in this embodiment, the hook knife drive assembly 35 includes a rotating shaft 351, an online hooking fork 352, a offline hooking fork 353 and a online hooking rod. The rotating shaft 351 is fixedly mounted on the flat online hooking bracket 31. The online hooking fork 352 and the offline hooking fork 353 are rotatably connected to the rotating shaft 351 at least in sequence from the top. The online hooking rod extends laterally and can move laterally in a straight line. One end of the online hooking fork 352 is connected to the online hooking rod, and the other end is connected to the offline hooking fork 353.

[0050] The hooking thread fork 353 of the embodiment of the present invention is a plurality of hooking threads, each of which is connected to the thread hooking thread of the present invention by way of example only. The hooking thread fork 353 of the embodiment of the present invention is a plurality of hooking threads, each of which is connected to the thread hooking thread of the present invention by way of example only.

[0051] In this embodiment, the thread fastening mechanism 5 includes a thread fastening mounting plate 51, a thread fastening drive assembly 52, a thread fastening guide assembly 53 and a thread fastening assembly 54. The thread fastening mounting plate 51 is fixedly connected to the shuttle box body 4, the thread fastening drive assembly 52 and the thread fastening guide assembly 53 are fixedly connected to the thread fastening mounting plate 51, and the thread fastening assembly 54 is simultaneously connected to the thread fastening drive assembly 52 and the thread fastening guide assembly 53, thereby installing the thread fastening mechanism 5 on the shuttle box body 4 through the thread fastening mounting plate 51.

[0052] Specifically, the upper fulcrum at the bottom of the thread tightening assembly 54 is connected to the thread tightening drive assembly 52, and the lower fulcrum at the bottom of the thread tightening assembly 54 is connected to the thread tightening guide assembly 53, so that the thread tightening drive assembly 52 drives the thread tightening assembly 54 to swing back and forth around the lower fulcrum, so that the thread tightening assembly 54 completes the action of tightening and loosening the thread, and then the thread tightening mechanism 5 cooperates with the thread cutting mechanism 6 set on the shuttle box body 4 to complete the thread cutting.

[0053] Since in the present application, the thread fastening assembly 54 is provided with two symmetrically arranged thread fastening forks 541, when the thread fastening driving assembly 52 drives the thread fastening assembly 54 to swing around the lower fulcrum, the thread fastening assembly 54 can fasten and loosen the double-needle surface thread at the same time through the two symmetrically arranged thread fastening forks 541 thereon, thereby reducing the space occupied by the thread fastening mechanism 5, and making the structure of the double-needle computer embroidery machine more compact.

[0054] In the present application, when the thread-locking driving component 52 drives the thread-locking component 54 to swing around the lower fulcrum, the thread-locking guide component 53 can guide and limit the swing of the thread-locking component 54 around the lower fulcrum, so that the swing of the thread-locking component 54 around the lower fulcrum is more stable, that is, the thread-locking and thread-loosening actions of the thread-locking component 54 are more stable, thereby improving the accuracy of the thread-locking mechanism 5 in locking the surface thread, and further improving the embroidery quality of the double-needle computer embroidery machine.

[0055] Specifically, in this embodiment, the wire drive assembly 52 includes a wire drive 521 and a drive mounting seat 522. The wire drive 521 is arranged on the drive mounting seat 522. The drive mounting seat 522 is fixedly connected to the wire mounting plate 51, thereby realizing a fixed connection between the wire drive assembly 52 and the wire mounting plate 51.

[0056] The upper support point at the bottom of the thread-holding assembly 54 is connected to the thread-holding driver 521, so that the thread-holding assembly 54 is driven by the thread-holding driver 521 to swing around the lower support point, so that the thread-holding assembly 54 can complete the thread-holding and thread-releasing actions. Specifically, in actual implementation, the thread-holding driver 521 can be a drive motor, a drive cylinder, a drive electromagnet, etc.

[0057] Specifically, in this embodiment, the buckle wire guide assembly 53 includes a buckle wire guide seat 531, a buckle wire guide plate 532 and a guide pad 533. The buckle wire guide seat 531 and the buckle wire guide plate 532 are respectively arranged on both sides of the buckle wire assembly 54, and the guide pad 533 is arranged between the buckle wire guide seat 531 and the buckle wire guide plate 532, so that the buckle wire guide seat 531, the guide pad 533 and the buckle wire guide plate 532 enclose a buckle wire guide hole 534.

[0058] The lower fulcrum at the bottom of the thread buckle assembly 54 is connected to the thread buckle guide seat 531, and the top of the thread buckle assembly 54 passes through the thread buckle guide hole 534, so that the thread buckle guide hole 534 further limits the swing stroke of the thread buckle assembly 54, and in the process of the thread buckle assembly 54 swinging, prevents the thread buckle assembly 54 from deviating to both sides, so that the swing of the thread buckle assembly 54 around the lower fulcrum is more stable, thereby improving the accuracy of the thread buckle mechanism 5 buckling the surface thread, and thus improving the embroidery quality of the double-needle computer embroidery machine.

[0059] In the present application, the buckle wire guide assembly 53 also includes a guide connector 535, through which the buckle wire guide seat 531, the buckle wire guide plate 532 and the guide pad 533 are connected to the buckle wire mounting plate 51, thereby realizing the connection between the buckle wire guide assembly 53 and the buckle wire mounting plate 51.

[0060] Specifically, in actual implementation, the guide connecting member 535 can be set as a screw, and through holes are set on the buckle wire guide seat 531, the buckle wire guide plate 532 and the guide pad 533. After one end of the screw passes through the buckle wire guide plate 532, the guide pad 533 and the through holes on the buckle wire guide seat 531 in turn, it is screwed to the buckle wire mounting plate 51, thereby realizing the connection between the buckle wire guide seat 531, the buckle wire guide plate 532 and the guide pad 533 and the buckle wire mounting plate 51.

[0061] Specifically, in this embodiment, the thread assembly 54 further includes two thread bodies 542, which are symmetrically arranged. Two thread forks 541 are respectively arranged on the tops of the two thread bodies 542, and the bottoms of the two thread bodies 542 are rotatably connected to the thread guide assembly 53. Specifically, the rotatable connection between the bottoms of the two thread bodies 542 and the thread guide seat 531, that is, the lower fulcrum mentioned in the above embodiment, is the connection point for the rotatable connection between the two thread bodies 542 and the thread guide seat 531.

[0062] The thread assembly 54 further includes a thread connecting rod 543, one end of which is rotatably connected to the middle portion of the two thread bodies 542, and the other end of which is rotatably connected to the thread drive assembly 52. Specifically, the other end of the thread connecting rod 543 is rotatably connected to the drive shaft of the thread drive 521, that is, the upper fulcrum mentioned in the above embodiment, which is the connection point for the rotatable connection between the thread connecting rod 543 and the drive shaft of the thread drive 521.

[0063] Therefore, the driving shaft of the thread buckle driver 521 pushes the two thread buckle bodies 542 to rotate around the lower fulcrum through the thread buckle connecting rod 543, driving the two thread buckle forks 541 on the top of the two thread buckle bodies 542 to rotate synchronously, so that the two thread buckle forks 541 respectively buckle and loosen the double-needle surface thread, and then buckle the surface thread through the thread buckle fork 541 assembly, and cooperate with the thread cutting mechanism 6 set on the shuttle box body 4 to complete the thread cutting.

[0064] In this embodiment, the thread trimming mechanism 6 includes a thread trimming rod 61, which extends laterally at the bottom of the shuttle box body 4 and can move laterally in a straight line; it also includes a first scissor assembly 63 and a second scissor assembly 64 arranged side by side in the laterally direction, which correspond to the cutting of the double needle thread respectively.

[0065] In the present application, the thread trimming mechanism 6 also includes a thread trimming link assembly 62, the first end of the thread trimming link assembly 62 is fixedly connected to the thread trimming rod 61, the second end is fixedly connected to the first scissors assembly 63, and the third end is fixedly connected to the second scissors assembly 64. Therefore, when the thread trimming rod 61 moves laterally in a straight line, the thread trimming link assembly 62 drives the first scissors assembly 63 and the second scissors assembly 64 to perform thread trimming actions synchronously, thereby realizing that a single thread trimming mechanism 6 can simultaneously trim the upper threads of the double needles to ensure that the upper thread can be used normally when the embroidery starts next time, and at the same time prevent the thread end from being too long to affect the appearance and quality of the embroidery.

[0066] In the present application, the first scissors assembly 63 and the second scissors assembly 64 are driven by the wire cutting rod 61, and the wire cutting action is performed synchronously under the drive of the wire cutting connecting rod assembly 62, that is, the first scissors assembly 63 and the second scissors assembly 64 are driven by the same driving member.

[0067] Therefore, although the present scissor mechanism is provided with two scissor assemblies, corresponding to the double-needle upper thread trimming respectively, the two scissor assemblies are driven by the same driving member. Therefore, compared with the prior art, it can not only reduce the space occupied by the thread trimming mechanism 6, but also improve the synchronization of the double-needle upper thread trimming action, thereby making the structure of the double-needle computer embroidery machine more compact, and improving the space utilization and embroidery quality of the double-needle computer embroidery machine.

[0068] Specifically, in this embodiment, the wire trimming link assembly 62 includes a connecting seat 621, a first connecting rod 622, a second connecting rod 623, a third connecting rod 624 and a fourth connecting rod 625, wherein the connecting seat 621 is fixedly connected to the wire trimming rod 61, the first connecting rod 622 is fixedly connected to the first scissors assembly 63, and the second connecting rod 623 is fixedly connected to the second scissors assembly 64, that is, the first end of the wire trimming link assembly 62 is an end fixedly connected to the connecting seat 621 and the wire trimming rod 61, the second end is an end fixedly connected to the first connecting rod 622 and the first scissors assembly 63, and the third end is an end fixedly connected to the second scissors assembly 64.

[0069] In the present application, the first link 622 and the second link 623 are arranged in parallel and spaced apart, one end of the third link 624 is rotatably connected to the connecting seat 621, and the other end is rotatably connected to the first link 622, and one end of the fourth link 625 is rotatably connected to the first link 622, and the other end is rotatably connected to the second link 623. Therefore, when the thread trimming rod 61 moves horizontally and linearly, it drives the connecting seat 621 to move horizontally and linearly synchronously.

[0070] The connecting seat 621 drives the first connecting rod 622 to rotate through the third connecting rod 624, and the first connecting rod 622 drives the first scissors assembly 63 to rotate. At the same time, the second connecting rod 623 is driven to rotate through the fourth connecting rod 625, and the second connecting rod 623 drives the second scissors assembly 64 to rotate, so that the first scissors assembly 63 and the second scissors assembly 64 perform thread cutting actions synchronously, thereby realizing that a single thread cutting mechanism 6 can cut the surface thread of the double needles at the same time.

[0071] Specifically, the thread trimming mechanism 6 also includes a thread trimming fixed seat 65, which is fixedly connected to the shuttle box body 4 and is arranged in parallel with the crossbeam 41 of the shuttle box body 4 in the horizontal direction. The first scissors assembly 63 is arranged on the thread trimming fixed seat 65, and the second scissors assembly 64 is arranged on the crossbeam 41 of the shuttle box body 4, thereby realizing the arrangement of the first scissors assembly 63 and the second scissors assembly 64 on the shuttle box body 4.

[0072] In the present application, the thread trimming mechanism 6 also includes a pull rod bracket 66, one end of which is fixedly connected to the thread trimming fixed seat 65 and the other end of which extends away from the thread trimming fixed seat 65, and a ring 661 is provided at the end of the pull rod bracket 66 extending away from the thread trimming fixed seat 65.

[0073] The thread trimming rod 61 passes through the ring 661 in the transverse direction and is movably connected to the ring 661, so that the rod bracket 66 supports the thread trimming rod 61 and enables the thread trimming rod 61 to move laterally in a straight line along the ring 661, thereby realizing the setting of the thread trimming rod 61 on the shuttle box body 4, and then realizing the setting of the thread trimming mechanism 6 on the shuttle box body 4.

[0074] Specifically, in this embodiment, the first scissors assembly 63 includes a first fixed knife 631, a first drive shaft 633 and a first movable knife 632. The first fixed knife 631 is fixedly installed on the top of the thread trimmer fixed seat 65. The first drive shaft 633 vertically penetrates the thread trimmer fixed seat 65 and is rotatably connected to the thread trimmer fixed seat 65. The first movable knife 632 is arranged on the top of the first drive shaft 633, and the first connecting rod 622 is fixedly connected to the bottom of the first drive shaft 633.

[0075] When the first scissors assembly 63 is trimming the thread, the first connecting rod 622 is first rotated to drive the first driving shaft 633 to rotate on the thread trimming fixed seat 65, thereby driving the first movable knife 632 at the top of the first driving shaft 633 to rotate in a direction away from the first fixed knife 631, so that the first fixed knife 631 and the first movable knife 632 are opened; then the first connecting rod 622 is reversely rotated to drive the first driving shaft 633 to rotate in a reverse direction on the thread trimming fixed seat 65, thereby driving the first movable knife 632 at the top of the first driving shaft 633 to rotate in a direction close to the first fixed knife 631, so that the first fixed knife 631 and the first movable knife 632 are closed, and the upper thread between the first fixed knife 631 and the first movable knife 632 is cut.

[0076] In this embodiment, since the first drive shaft 633 vertically penetrates the trimmer mount 65, a through hole is provided on the trimmer mount 65 for the first drive shaft 633 to pass through. In this application, the first scissor assembly 63 further includes a first bearing sleeve 634, which is disposed between the first drive shaft 633 and the through hole of the trimmer mount 65.

[0077] Specifically, the outer ring of the first bearing sleeve 634 is fixedly connected to the outer wall of the first drive shaft 633, and the inner ring is fixedly connected to the inner wall of the through hole of the trimmer fixing seat 65, so that the first drive shaft 633 and the trimmer fixing seat 65 are rotatedly connected through the rolling elements between the outer ring and the inner ring of the first bearing sleeve 634, and at the same time, the first drive shaft 633 is prevented from moving in a straight line vertically on the trimmer fixing seat 65, thereby ensuring the stability of the trimming action of the first scissors assembly 63.

[0078] In the present application, the second scissors assembly 64 includes a second fixed knife 641, a second drive shaft 643 and a second movable knife 642. The second fixed knife 641 is fixedly mounted on the top of the cross beam 41 of the shuttle box body 4. The second drive shaft 643 vertically penetrates the cross beam 41 of the shuttle box body 4 and is rotatably connected to the cross beam 41 of the shuttle box body 4. The second movable knife 642 is arranged on the top of the second drive shaft 643, and the second connecting rod 623 is fixedly connected to the bottom of the second drive shaft 643.

[0079] When the second scissors assembly 64 is cutting the thread, the second connecting rod 623 is first rotated to drive the second driving shaft 643 to rotate on the cross beam 41 of the shuttle box body 4, thereby driving the second movable knife 642 on the top of the second driving shaft 643 to rotate in a direction away from the second fixed knife 641, so that the second fixed knife 641 and the second movable knife 642 are opened; then the second connecting rod 623 is rotated in the opposite direction to drive the second driving shaft 643 to rotate in the opposite direction on the cross beam 41 of the shuttle box body 4, thereby driving the second movable knife 642 on the top of the second driving shaft 643 to rotate in a direction close to the second fixed knife 641, so that the second fixed knife 641 and the second movable knife 642 are closed, and the upper thread located between the second fixed knife 641 and the second movable knife 642 is cut.

[0080] Furthermore, in the present application, the thread trimming mechanism 6 further includes a thread trimming guide seat 68, which is disposed directly below the crossbeam 41 of the shuttle box body 4 and is fixedly connected to the shuttle box body 4. When the second drive shaft 643 is disposed vertically, it sequentially passes through the crossbeam 41 of the shuttle box body 4 and the thread trimming guide seat 68, and the second drive shaft 643 is rotationally connected to the crossbeam 41 of the shuttle box body 4 and the thread trimming guide seat 68.

[0081] The second connecting rod 623 is fixedly connected to the bottom of the second driving shaft 643. When the second driving shaft 643 is driven to rotate, the second driving shaft 643 is limited at the top by the crossbeam 41 of the shuttle box body 4, and the thread trimming guide seat 68 limits the second driving shaft 643 at the bottom to prevent the second driving shaft 643 from swinging during the rotation process, thereby ensuring the stability of the thread trimming action of the second scissors assembly 64.

[0082] In this embodiment, since the second drive shaft 643 vertically penetrates the thread trimmer guide seat 68, a through hole for the first drive shaft 633 to pass through is provided on the thread trimmer guide seat 68. In this application, the second scissor assembly 64 further includes a second bearing sleeve 644, which is disposed between the second drive shaft 643 and the through hole of the thread trimmer guide seat 68.

[0083] Specifically, the outer ring of the second bearing sleeve 644 is fixedly connected to the outer wall of the second drive shaft 643, and the inner ring is fixedly connected to the inner wall of the through hole of the thread trimming guide seat 68, so that the second drive shaft 643 and the thread trimming guide seat 68 are rotatedly connected through the rolling body between the outer ring and the inner ring of the second bearing sleeve 644, and the second drive shaft 643 is prevented from moving in a straight line vertically on the thread trimming guide seat 68, thereby further ensuring the stability of the thread trimming action of the second scissors assembly 64.

[0084] In this embodiment, the thread trimmer mechanism 6 further includes a thread trimmer reset spring 67, which is sleeved on the thread trimmer pull rod 61, with one end abutting against the pull rod bracket 66 and the other end abutting against the thread trimmer link assembly 62. Specifically, one end of the thread trimmer reset spring 67 abuts against the pull rod bracket 66 and the other end abuts against the connecting seat 621 of the thread trimmer link assembly 62.

[0085] When the thread trimming mechanism 6 is trimming the thread, the thread trimming rod 61 first moves horizontally and linearly to one side under the action of external force, driving the connecting seat 621 to move toward the direction close to the rod bracket 66, thereby driving the first drive shaft 633 and the second drive shaft 643 to rotate synchronously through the first connecting rod 622, the second connecting rod 623, the third connecting rod 624 and the fourth connecting rod 625, so that the first fixed knife 631 and the first movable knife 632 are opened, and the second fixed knife 641 and the second movable knife 642 are opened. At this time, the thread trimming return spring 67 is in a compressed state.

[0086] After the external force applied to the thread trimming lever 61 is removed, the thread trimming return spring 67 restores its own deformation under the elastic force, pushing the connecting seat 621 to move in the direction away from the pull rod bracket 66, and at the same time the thread trimming lever 61 moves laterally and linearly toward the opposite side, thereby driving the first drive shaft 633 and the second drive shaft 643 to rotate synchronously in opposite directions through the first connecting rod 622, the second connecting rod 623, the third connecting rod 624 and the fourth connecting rod 625, so that the first fixed knife 631 is closed with the first movable knife 632, and the second fixed knife 641 is closed with the second movable knife 642, thereby realizing the thread trimming of the double-needle surface thread by the present thread trimming mechanism 6, thereby making the use of the present thread trimming mechanism 6 simpler, more convenient and easier to implement.

[0087] In this embodiment, taking the direction facing the front of the double-needle computerized embroidery machine as an example, the operating principle of the thread trimming mechanism 6 is as follows: the thread trimming lever 61 first moves linearly to the right under the action of an external force, driving the connecting base 621 to move linearly to the right synchronously. Driven by the connecting base 621, the third connecting rod 624 drives the first connecting rod 622 to rotate counterclockwise about the central axis of the first drive shaft 633. Simultaneously, the fourth connecting rod 625 drives the second connecting rod 623 to rotate counterclockwise about the central axis of the second drive shaft 643. It is foreseeable that in this application, the connecting axis between the first connecting rod 622 and the third connecting rod 624, and the connecting axis between the fourth connecting rod 625 and the first connecting rod 622 are the same.

[0088] The first connecting rod 622 drives the first driving shaft 633 to rotate counterclockwise, and the first driving shaft 633 drives the first movable knife 632 to rotate counterclockwise around the central axis of the first driving shaft 633, so that the first fixed knife 631 and the first movable knife 632 are opened; the second connecting rod 623 drives the second driving shaft 643 to rotate counterclockwise, and the second driving shaft 643 drives the second movable knife 642 to rotate counterclockwise around the central axis of the second driving shaft 643, so that the second fixed knife 641 and the second movable knife 642 are opened.

[0089] Then remove the outer side applied to the thread trimmer rod 61, so that the connecting seat 621 and the thread trimmer rod 61 move synchronously to the left in a straight line under the elastic force of the thread trimmer return spring 67. Driven by the connecting seat 621, the third connecting rod 624 drives the first connecting rod 622 to rotate clockwise around the central axis of the first drive shaft 633, and at the same time, the fourth connecting rod 625 drives the second connecting rod 623 to rotate clockwise around the central axis of the second drive shaft 643.

[0090] The first connecting rod 622 drives the first driving shaft 633 to rotate clockwise, and the first driving shaft 633 drives the first movable knife 632 to rotate clockwise around the central axis of the first driving shaft 633, so that the first fixed knife 631 and the first movable knife 632 are closed, and the noodle thread between the first fixed knife 631 and the first movable knife 632 is cut; the second connecting rod 623 drives the second driving shaft 643 to rotate clockwise, and the second driving shaft 643 drives the second movable knife 642 to rotate clockwise around the central axis of the second driving shaft 643, so that the second fixed knife 641 and the second movable knife 642 are opened, and the noodle thread between the second fixed knife 641 and the second movable knife 642 is cut, thereby completing the thread trimming of the thread trimming mechanism 6.

[0091] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should all be included in the scope of protection of the present invention.

Claims

1. A double-needle computer embroidery machine, characterized by: The invention comprises a machine head component and a shuttle box component, wherein the shuttle box component is arranged below the machine head component; the machine head component comprises a machine housing (1), and a single needle bar and presser foot driving mechanism (2) and a single thread hooking mechanism (3) arranged on the machine housing (1); the shuttle box component comprises a shuttle box body (4) arranged below the machine housing (1), and a single thread buckling mechanism (5) and a single thread cutting mechanism (6) arranged on the shuttle box body (4); the single needle bar and presser foot driving mechanism (2) simultaneously drives the needle bar and presser foot of the double needle to perform up and down reciprocating motion, the single thread hooking mechanism (3) simultaneously hooks the upper thread of the double needle, the single thread buckling mechanism (5) simultaneously buckles the upper thread of the double needle, and the single thread cutting mechanism (6) simultaneously cuts the upper thread of the double needle.

2. A double-needle computer embroidery machine as claimed in claim 1, characterized in that: The needle bar presser foot drive mechanism (2) comprises two guide rods (21) vertically spaced apart in the housing (1), two needle bar drivers (22) respectively arranged on the two guide rods (21), two presser foot drivers (23) respectively arranged on the two guide rods (21), two presser foot driven assemblies (24) connecting the needle bar driver (22) and the presser foot driver (23) on the same guide rod (21), a driven shaft (25) connecting the two presser foot driven assemblies (24), and a needle bar driving assembly (26) for simultaneously driving the two needle bar drivers (22) to reciprocate up and down along the two guide rods (21).

3. A double-needle computer embroidery machine as claimed in claim 2, characterized in that: The needle bar active component (26) includes a driving shaft that passes through the housing (1) in the transverse direction, a driving cam component (261) provided on the driving shaft, a three-eye connecting rod component (262) connected to the driving cam component (261), and two driving connecting rods (263) one end of which is connected to the three-eye connecting rod component (262) and the other end of which is connected to the needle bar driver (22).

4. A double-needle computerized embroidery machine as claimed in claim 2, characterized in that: The presser foot driven assembly (24) comprises a first driven link (241), a second driven link (242) having one end connected to the needle bar driver (22) and the other end connected to the middle of the first driven link (241), and a third driven link (243) having one end connected to the presser foot driver (23) and the other end connected to one end of the first driven link (241), and the driven shaft (25) connects the other ends of the two first driven links (241).

5. A double-needle computer embroidery machine as claimed in claim 1, characterized in that: The wire hooking mechanism (3) comprises a flat wire hooking bracket (31) fixedly connected to the bottom of the housing (1), a flat wire hooking cover (32) provided on the flat wire hooking bracket (31), two hook knives (33) arranged in parallel and spaced apart between the flat wire hooking bracket (31) and the flat wire hooking cover (32), a hook knife connecting member (34) connecting the two hook knives (33), and a hook knife driving assembly (35) connected to the hook knife connecting member (34), wherein one end of the hook knife (33) extends outside the flat wire hooking bracket (31) and the flat wire hooking cover (32).

6. A double-needle computerized embroidery machine as claimed in claim 5, characterized in that: The flat wire hook cover (32) is provided with two wire hook guide holes (321) arranged in parallel and spaced apart. The hook knife (33) is provided with a sliding post (331) that penetrates the wire hook guide hole (321) and slides with the wire hook guide hole (321). One end of the hook knife connecting member (34) is connected to the sliding post (331) of one hook knife (33) and the other end is connected to the sliding post (331) of the other hook knife (33). The flat wire hook cover (32) is also provided with a sliding groove (322). The sliding groove (322) is arranged between the two wire hook guide holes (321) and is arranged parallel to the two wire hook guide holes (321). The top of the hook knife connecting member (34) is provided with a slider (341) that slides with the sliding groove (322).

7. A double-needle computerized embroidery machine as claimed in claim 5, characterized in that: The hook knife connecting member (34) is provided with a connecting column (342) at the bottom, and the hook knife driving assembly (35) includes a rotating shaft (351) fixed on the flat hook wire bracket (31), an upper hook wire shift fork (352) and an lower hook wire shift fork (353) which are rotatably connected to the rotating shaft (351) at least in sequence, and a hook wire pull rod extending laterally and capable of laterally linear movement, one end of the upper hook wire shift fork (352) is connected to the hook wire pull rod, and the other end is connected to the lower hook wire shift fork (353), and a strip hole (3531) is provided at the end of the lower hook wire shift fork (353), and the connecting column (342) is inserted into the strip hole (3531), and the strip hole (3531) is slidably fitted.

8. A double-needle computerized embroidery machine as claimed in claim 1, characterized in that: The thread-locking mechanism (5) comprises a thread-locking mounting plate (51) fixedly connected to the shuttle box body (4), a thread-locking driving assembly (52) fixedly connected to the thread-locking mounting plate (51), a thread-locking guide assembly (53) fixedly connected to the thread-locking mounting plate (51), and a thread-locking assembly (54) symmetrically provided with two thread-locking forks (541); an upper fulcrum at the bottom of the thread-locking assembly (54) is connected to the thread-locking driving assembly (52), a lower fulcrum at the bottom of the thread-locking assembly (54) is connected to the thread-locking guide assembly (53), the thread-locking driving assembly (52) is used to drive the thread-locking assembly (54) to swing around the lower fulcrum, and the thread-locking guide assembly (53) limits the swing of the thread-locking assembly (54) around the lower fulcrum.

9. A double-needle computerized embroidery machine as claimed in claim 8, characterized in that: The detent line drive assembly (52) comprises a detent line driver (521) and a driver mounting seat (522); the upper fulcrum at the bottom of the detent line mechanism (5) is connected to the detent line driver (521); the detent line driver (521) is arranged on the driver mounting seat (522); and the driver mounting seat (522) is fixedly connected to the detent line mounting plate (51).

10. A double-needle computerized embroidery machine as claimed in claim 8, characterized in that: The detent wire guide assembly (53) comprises a detent wire guide seat (531) and a detent wire guide plate (532) arranged on both sides of the detent wire assembly (54), a guide pad (533) arranged between the detent wire guide seat (531) and the detent wire guide plate (532), and a guide connector (535) connecting the detent wire guide seat (531), the detent wire guide plate (532) and the guide pad (533) to the detent wire mounting plate (51). The detent wire guide seat (531), the guide pad (533) and the detent wire guide plate (532) enclose a detent wire guide hole (534). The lower fulcrum of the bottom of the detent wire assembly (54) is connected to the detent wire guide seat (531), and the top passes through the detent wire guide hole (534).

11. A double-needle computerized embroidery machine as claimed in claim 8, characterized in that: The detent assembly (54) further comprises two symmetrically arranged detent bodies (542), and a detent link (543) having one end rotatably connected to the middle of the two detent bodies (542) and the other end rotatably connected to the detent drive assembly (52). The two detent forks (541) are respectively arranged on the top of the two detent bodies (542), and the bottoms of the two detent bodies (542) are rotatably connected to the detent guide assembly (53). The upper fulcrum is the connection point between the detent link (543) and the detent drive assembly (52), and the lower fulcrum is the connection point between the two detent bodies (542) and the detent guide assembly (53).

12. A double-needle computerized embroidery machine as claimed in claim 1, characterized in that: The thread trimming mechanism (6) comprises a thread trimming rod (61), a thread trimming connecting rod assembly (62), a first scissor assembly (63) and a second scissor assembly (64); the thread trimming rod (61) extends in a transverse direction and can move in a transverse linear manner; the first scissor assembly (63) and the second scissor assembly (64) are arranged side by side in a transverse direction; the first end of the thread trimming connecting rod assembly (62) is fixedly connected to the thread trimming rod (61), the second end is fixedly connected to the first scissor assembly (63), and the third end is connected to the second scissor assembly (64), so that when the thread trimming rod (61) moves in a transverse linear manner, the first scissor assembly (63) and the second scissor assembly (64) are driven to trim the thread simultaneously.

13. A double-needle computerized embroidery machine as claimed in claim 12, characterized in that: The thread trimming link assembly (62) includes a connecting seat (621) fixedly connected to the thread trimming pull rod (61), a first link (622) fixedly connected to the first scissors assembly (63), a second link (623) fixedly connected to the second scissors assembly (64), a third link (624) rotatably connected to the connecting seat (621) at one end and rotatably connected to the first link (622) at the other end, and a fourth link (625) rotatably connected to the first link (622) at the other end, wherein the first link (622) and the second link (623) are arranged in parallel and spaced apart.

14. A double-needle computerized embroidery machine as claimed in claim 13, characterized in that: The thread trimming mechanism (6) further includes a thread trimming fixed seat (65) arranged in parallel with the crossbeam (41) of the shuttle box body (4) in the transverse direction, a pull rod bracket (66) having one end fixedly connected to the thread trimming fixed seat (65) and the other end extending in a direction away from the thread trimming fixed seat (65), and a thread trimming return spring (67) sleeved on the thread trimming pull rod (61), the first scissors assembly (63) being arranged on the thread trimming fixed seat (65), the second scissors assembly (64) being arranged on the crossbeam (41) of the shuttle box body (4), the end of the pull rod bracket (66) extending in a direction away from the thread trimming fixed seat (65) being movably connected to the thread trimming pull rod (61), the thread trimming return spring (67) having one end abutting against the pull rod bracket (66) and the other end abutting against the thread trimming connecting rod assembly (62).

15. A double-needle computerized embroidery machine as claimed in claim 14, characterized in that: The first scissors assembly (63) comprises a first fixed knife (631) fixedly mounted on the top of the thread trimmer fixed seat (65), a first driving shaft (633) vertically penetrating the thread trimmer fixed seat (65) and rotatably connected to the thread trimmer fixed seat (65), and a first movable knife (632) provided on the top of the first driving shaft (633), and the first connecting rod (622) is fixedly connected to the bottom of the first driving shaft (633); the second scissors assembly (64) comprises a second fixed knife (641) fixedly mounted on the top of the crossbeam (41) of the shuttle box body (4), a second driving shaft (643) vertically penetrating the crossbeam (41) of the shuttle box body (4) and rotatably connected to the crossbeam (41) of the shuttle box body (4), and a second movable knife (642) provided on the top of the second driving shaft (643), and the second connecting rod (623) is fixedly connected to the bottom of the second driving shaft (643).

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