A thread trimming mechanism suitable for multi-head embroidery machine

Abstract

The utility model relates to a kind of thread trimming mechanism suitable for multi-head embroidery machine.It relates to the technical field of embroidery machine.The application specifically includes at least two thread trimming devices arranged on shuttle box body, corresponding the thread trimming of at least two double needle heads;Thread trimming device includes first needle thread trimming assembly, second needle thread trimming assembly and thread trimming fixed plate, first needle thread trimming assembly is arranged on the beam of shuttle box body, second needle thread trimming assembly is arranged on thread trimming fixed plate.The thread trimming fixed plate of the utility model is fixedly connected with shuttle box body, when being set on one side of middle connecting groove, when second needle thread trimming assembly is set on thread trimming fixed plate, avoid the position where middle connecting groove is, so it will not interfere with middle connecting piece, so as to ensure that the thread trimming mechanism can normally cut thread, and further reduce the distance between heads, so that multi-head embroidery machine can realize higher density embroidery, improve embroidery quality.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, and in particular to a shearing mechanism suitable for multi-head embroidery machines.

[0002] Linear mechanism. Background Technology

[0003] A multi-head embroidery machine typically includes multiple heads, a shuttle box, and an embroidery frame. The heads are positioned above the shuttle box and arranged horizontally side-by-side. The embroidery frame is positioned between the heads and the shuttle box. The embroidery frame includes a front stop component on the front side of the shuttle box, a rear stop component on the rear side of the shuttle box, and intermediate connecting pieces between the front and rear stops. Therefore, the shuttle box has several intermediate connecting slots for these connecting pieces to pass through, allowing them to longitudinally span the shuttle box and connect the front and rear stops.

[0004] Multi-head embroidery machines typically have multiple thread-cutting mechanisms on their shuttle boxes, each corresponding to a different head. This allows the thread to be cut during operation, such as when a color of thread needs to be changed after embroidery work is completed, or when a section of the pattern needs to be embroidered and the next section needs to be started. This ensures the thread can be used normally the next time embroidery begins, while also preventing excessively long threads from affecting the appearance and quality of the embroidery.

[0005] For multi-head embroidery machines with multiple double-needle heads, each double-needle head has two parallel needles. These two needles work synchronously with the corresponding shuttle heads on the shuttle box to form two parallel stitches with a fixed spacing. Correspondingly, multiple thread-cutting mechanisms are set on the shuttle box. Each thread-cutting mechanism needs to cut the double-needle stitches. Therefore, when the thread-cutting mechanism is set on the shuttle box, the space requirement is larger.

[0006] When the intermediate connector passes longitudinally across the shuttle box through the intermediate connecting groove to connect the front and rear guard parts, it will restrict the space for the thread cutting mechanism on the shuttle box, thus affecting the further reduction of the distance between the machine heads. Consequently, the multi-head embroidery machine cannot achieve higher density embroidery, reducing the embroidery quality. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of the prior art by providing a thread-cutting mechanism suitable for multi-head embroidery machines. This mechanism can ensure the normal thread-cutting function of the thread-cutting mechanism while further reducing the distance between the machine heads, enabling multi-head embroidery machines to achieve higher density embroidery and improve embroidery quality.

[0008] This utility model proposes a thread-cutting mechanism suitable for a multi-head embroidery machine. The multi-head embroidery machine includes a shuttle box, at least two double-needle heads located above the shuttle box, and an embroidery frame disposed between the shuttle box and the double-needle heads. The embroidery frame includes a front stop component located on the front side of the shuttle box, a rear stop component located on the rear side of the shuttle box, and a plurality of intermediate connecting members connecting the front stop component and the rear stop component. The shuttle box is provided with a plurality of intermediate connecting grooves, each corresponding to a plurality of the intermediate connecting members, including those disposed on the shuttle box. The device has at least two thread-cutting devices on the body, each corresponding to the thread cutting of at least two double-needle heads. The thread-cutting device includes a first needle thread-cutting assembly, a second needle thread-cutting assembly, and a thread-cutting fixing plate. The first needle thread-cutting assembly is disposed on the crossbeam of the shuttle box body. The thread-cutting fixing plate is fixedly connected to the shuttle box body and is spaced laterally from the crossbeam of the shuttle box body. The second needle thread-cutting assembly is disposed on the thread-cutting fixing plate. The thread-cutting fixing plate is located on one side of the intermediate connecting groove, so that the second needle thread-cutting assembly avoids the location of the intermediate connecting groove.

[0009] Furthermore, the thread cutting mechanism also includes a thread cutting lever extending laterally on the front side of the shuttle box. The thread cutting lever can move laterally in a straight line, thereby driving the first needle thread cutting assembly and the second needle thread cutting assembly to perform thread cutting actions.

[0010] Furthermore, the first needle thread cutting assembly includes a first scissor assembly disposed on the crossbeam of the shuttle box, and a first linkage assembly connecting the first scissor assembly and the thread cutting lever. The thread cutting lever drives the first scissor assembly to perform thread cutting action through the first linkage assembly.

[0011] Furthermore, the first scissor assembly includes a first fixed blade disposed on the shuttle box crossbeam, a first rotating shaft passing through the shuttle box crossbeam, and a first movable blade disposed on the top of the first rotating shaft. One end of the first linkage assembly is connected to the bottom of the first rotating shaft, and the other end is connected to the wire cutting rod.

[0012] Furthermore, the first needle-cutting assembly also includes a first guide seat located below the shuttle box crossbeam. The first guide seat is fixedly connected to the shuttle box, and the first rotating shaft passes through the first guide seat, guiding the rotation of the first rotating shaft.

[0013] Furthermore, the first linkage assembly includes a first linkage seat fixedly connected to the wire-cutting lever, a first connecting rod fixedly connected to the bottom of the first rotating shaft, and a second connecting rod with one end rotatably connected to the first linkage seat and the other end rotatably connected to the first connecting rod.

[0014] Furthermore, the second needle thread cutting assembly includes a second scissor assembly disposed on the thread cutting fixing plate, and a second linkage assembly connecting the second scissor assembly and the thread cutting lever. The thread cutting lever drives the second scissor assembly to perform thread cutting action through the second linkage assembly.

[0015] Furthermore, the second scissor assembly includes a second fixed blade disposed on the wire-cutting fixing plate, a second rotating shaft passing through the wire-cutting fixing plate, and a second movable blade disposed on the top of the second rotating shaft. One end of the second linkage assembly is connected to the bottom of the second rotating shaft, and the other end is connected to the wire-cutting pull rod.

[0016] Furthermore, the second needle-cutting assembly also includes a second guide seat located below the thread-cutting fixing plate. The second guide seat is fixedly connected to the shuttle box body, and the second rotating shaft passes through the second guide seat, which guides the rotation of the second rotating shaft.

[0017] Furthermore, the second linkage assembly includes a wire-cutting synchronization rod arranged parallel to and spaced apart from the wire-cutting pull rod, two connecting rods that fix both ends of the wire-cutting synchronization rod to the wire-cutting pull rod respectively, a second linkage seat fixedly connected to the wire-cutting synchronization rod, a third connecting rod fixedly connected to the bottom of the second rotating shaft, and a fourth connecting rod that is rotatably connected at one end to the second linkage seat and at the other end to the third connecting rod.

[0018] The thread-cutting mechanism for multi-head embroidery machines proposed in this utility model has the following beneficial effects:

[0019] (1) When the thread cutting fixing plate of this thread cutting mechanism is fixedly connected to the shuttle box, it is set on one side of the middle connecting groove so that when the second needle thread cutting component is set on the thread cutting fixing plate, it avoids the position of the middle connecting groove. Therefore, it will not interfere with the middle connecting part. This ensures the normal thread cutting function of this thread cutting mechanism and further reduces the distance between the machine heads, enabling the multi-head embroidery machine to achieve higher density embroidery and improve the embroidery quality.

[0020] (2) The thread cutting mechanism also includes a thread cutting lever. The thread cutting lever extends laterally on the front side of the shuttle box and can move laterally in a straight line. Thus, by moving laterally in a straight line through the thread cutting lever, the first needle thread cutting assembly and the second needle thread cutting assembly can simultaneously perform thread cutting actions, thereby enabling the first needle thread cutting assembly and the second needle thread cutting assembly to respectively correspond to the thread cutting of the two needles in the double needle head, thus realizing the thread cutting of the thread cutting mechanism.

[0021] (3) The first needle thread cutting assembly of this thread cutting mechanism includes a first scissor assembly and a first linkage assembly. The first scissor assembly is set on the crossbeam of the shuttle box body. The first linkage assembly connects the first scissor assembly to the thread cutting pull rod. Thus, when the thread cutting pull rod moves laterally in a straight line, the first linkage assembly drives the first scissor assembly to perform the thread cutting action, thereby realizing the thread cutting of one of the needle stitches of the double needle head by the first needle thread cutting assembly.

[0022] (4) The first needle cutting assembly of this thread cutting mechanism also includes a first guide seat. The first guide seat is located below the crossbeam of the shuttle box and is fixedly connected to the shuttle box. The first guide seat limits and guides the rotation of the first rotating shaft below the crossbeam of the shuttle box, thereby preventing the first rotating shaft from swaying during rotation and ensuring the stability of the thread cutting action of the first needle cutting assembly.

[0023] (5) The second needle thread cutting component of this thread cutting mechanism includes a second scissor component and a second linkage component. The second scissor component is set on the thread cutting fixing plate. The second linkage component connects the second scissor component to the thread cutting pull rod. So when the thread cutting pull rod moves laterally in a straight line, the second linkage component drives the second scissor component to perform the thread cutting action, thereby realizing the thread cutting of the other needle stitch of the double needle machine head by the second needle thread cutting component.

[0024] (6) The second needle cutting assembly of this thread cutting mechanism also includes a second guide seat. The second guide seat is located below the thread cutting fixing plate and is fixedly connected to the shuttle box. The second guide seat limits and guides the rotation of the second rotating shaft below the thread cutting fixing plate, thereby preventing the second rotating shaft from swaying during rotation and ensuring the stability of the thread cutting action of the second needle cutting assembly. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements.

[0026] Figure 1 This is a schematic diagram of the structure of a thread-cutting mechanism for a multi-head embroidery machine as described in an embodiment of the present invention, arranged on the shuttle box.

[0027] Figure 2 This is a schematic diagram of the structure of a first needle thread cutting assembly and a second needle thread cutting assembly of a thread cutting mechanism suitable for a multi-head embroidery machine according to an embodiment of the present invention, partially arranged in the shuttle box.

[0028] Figure 3 This is a schematic diagram of the structure of the first scissor assembly of a thread-cutting mechanism for a multi-head embroidery machine, as partially disposed in the shuttle box, according to an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the structure of the second scissor assembly of a thread-cutting mechanism for a multi-head embroidery machine according to an embodiment of the present invention, which is arranged on the thread-cutting fixing plate.

[0030] Figure 5 This is a schematic diagram of the structure of the first linkage component of a thread-cutting mechanism applicable to a multi-head embroidery machine according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the second linkage component of a thread-cutting mechanism applicable to a multi-head embroidery machine according to an embodiment of the present invention.

[0032] In the diagram: 1. Shuttle box; 11. Intermediate connecting groove; 12. Crossbeam; 2. First needle thread cutting assembly; 21. First scissor assembly; 211. First fixed blade; 212. First rotating shaft; 213. First moving blade; 22. First linkage assembly; 221. First linkage seat; 222. First connecting rod; 223. Second connecting rod; 23. First guide seat; 3. Second needle thread cutting assembly; 31. Second scissor assembly; 311. Second fixed blade; 312. Second rotating shaft; 313. Second moving blade; 32. Second linkage assembly; 321. Thread cutting synchronization rod; 322. Connecting rod; 323. Second linkage seat; 324. Third connecting rod; 325. Fourth connecting rod; 33. Second guide seat; 4. Thread cutting fixing plate; 5. Thread cutting pull rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0034] Please see Figures 1-6 This utility model provides a thread-cutting mechanism applicable to a multi-head embroidery machine. The multi-head embroidery machine includes a shuttle box 1, at least two double-needle heads located above the shuttle box 1, and an embroidery frame disposed between the shuttle box 1 and the double-needle heads. The embroidery frame includes a front stop component disposed on the front side of the shuttle box 1, a rear stop component disposed on the rear side of the shuttle box 1, and a plurality of intermediate connecting members connecting the front stop component and the rear stop component. The shuttle box 1 is provided with a plurality of intermediate connecting grooves 11, which respectively correspond to the accommodation of the plurality of intermediate connecting members.

[0035] The multi-head embroidery machine includes a shuttle box 1, at least two double-needle heads, and an embroidery frame. The at least two double-needle heads are arranged side-by-side horizontally on the crossbeam 12 of the machine frame. The shuttle box 1 is located below the double-needle heads, and the embroidery frame is located between the shuttle box 1 and the double-needle heads. The shuttle box 1 may consist of multiple shuttle boxes arranged side-by-side horizontally, or it may be a single, integral structure; however, one shuttle box 1 corresponds to at least two double-needle heads.

[0036] The double-needle sewing head uses two parallel needles that work synchronously with the corresponding shuttle heads on the shuttle box 1 to form two parallel stitches with a fixed spacing. That is, a shuttle box 1 is equipped with at least four shuttle heads to work in conjunction with the needles of at least two double-needle sewing heads.

[0037] The embroidery frame is positioned between the shuttle box 1 and the double-needle sewing machine head. It is used to fix the fabric and move the fabric along a designated trajectory, allowing the double-needle sewing machine head to move up and down via the needles, embroidering the fabric with the top thread to form the desired pattern. The embroidery frame includes a front stop component, a rear stop component, and several intermediate connecting parts. The front stop component is located on the front side of the shuttle box 1, and the rear stop component is located on the rear side of the shuttle box 1. Several intermediate connecting parts extend longitudinally across the shuttle box 1, connecting the front stop component and the rear stop component.

[0038] Therefore, a number of intermediate connecting grooves 11 are provided longitudinally on the shuttle box 1. The intermediate connecting grooves 11 correspond to the accommodation of a number of intermediate connecting parts, thereby enabling the intermediate connecting parts to longitudinally cross the shuttle box 1 and connect the front stop part and the rear stop part.

[0039] The thread-cutting mechanism of this application is installed on the shuttle box 1 and includes at least two thread-cutting devices. During the operation of the embroidery machine, when the embroidery of a certain color of thread is completed and needs to be changed to another color, or when the embroidery of a certain part of the pattern is completed and the embroidery of the next area of ​​the pattern is to begin, the thread is cut at least two double-needle heads respectively to ensure that the thread can be used normally when the next embroidery begins, while preventing the thread ends from being too long and affecting the appearance and quality of the embroidery.

[0040] Since the double-needle sewing head includes two horizontally arranged needles, in this embodiment, the thread cutting device includes a first needle thread cutting assembly 2, a second needle thread cutting assembly 3, and a thread cutting fixing plate 4. The first needle thread cutting assembly 2 is disposed on the crossbeam 12 of the shuttle box 1. The thread cutting fixing plate 4 is fixedly connected to the shuttle box 1 and is horizontally spaced from the crossbeam 12 of the shuttle box 1. The second needle thread cutting assembly 3 is disposed on the thread cutting fixing plate 4, so that the first needle thread cutting assembly 2 and the second needle thread cutting assembly 3 are arranged horizontally side by side on the shuttle box 1, thereby enabling the first needle thread cutting assembly 2 and the second needle thread cutting assembly 3 to respectively correspond to the thread cutting of the two needles in the double-needle sewing head.

[0041] It is foreseeable that the intermediate connecting groove 11 on the shuttle box 1 is located between two adjacent thread cutting devices, that is, each thread cutting device has one thread cutting component away from the intermediate connecting groove 11, while the other thread cutting component is close to the intermediate connecting groove 11. In this application, the first needle thread cutting component 2 is the thread cutting component away from the intermediate connecting groove 11, and the second needle thread cutting component 3 is the thread cutting component close to the intermediate connecting groove 11.

[0042] When the intermediate connector is accommodated in the intermediate connecting groove 11, the intermediate connector extends longitudinally across the shuttle box 1, which causes the second needle cutting assembly 3, which is close to the intermediate connecting groove 11, to be spatially restricted on the shuttle box 1, thus affecting the further reduction of the distance between the double needle heads.

[0043] In this application, when the thread cutting fixing plate 4 is fixedly connected to the shuttle box 1, it is set on one side of the intermediate connecting groove 11, so that when the second needle thread cutting assembly 3 is set on the thread cutting fixing plate 4, it avoids the position of the intermediate connecting groove 11. Therefore, it will not interfere with the intermediate connecting piece housed in the intermediate connecting groove 11. This ensures the normal thread cutting function of the thread cutting mechanism and further reduces the distance between the machine heads, enabling the multi-head embroidery machine to achieve higher density embroidery and improve the embroidery quality.

[0044] In this embodiment, the thread cutting mechanism further includes a thread cutting lever 5. The thread cutting lever 5 extends laterally on the front side of the shuttle box 1 and can move laterally in a straight line. Thus, by moving laterally in a straight line, the thread cutting lever 5 drives the first needle thread cutting assembly 2 and the second needle thread cutting assembly 3 to perform thread cutting actions simultaneously. This allows the first needle thread cutting assembly 2 and the second needle thread cutting assembly 3 to respectively cut the thread of the two needles in the double-needle machine head, thereby realizing the thread cutting function of this thread cutting mechanism.

[0045] Specifically, in this embodiment, the first needle thread cutting assembly 2 includes a first scissor assembly 21 and a first linkage assembly 22. The first scissor assembly 21 is disposed on the crossbeam 12 of the shuttle box 1. The first linkage assembly 22 connects the first scissor assembly 21 to the thread cutting lever 5. Thus, when the thread cutting lever 5 moves laterally in a straight line, the first linkage assembly 22 drives the first scissor assembly 21 to perform a thread cutting action, thereby realizing the first needle thread cutting assembly 2 cutting the thread of one of the needles of the double needle machine head.

[0046] Specifically, in this embodiment, the first scissor assembly 21 includes a first fixed blade 211, a first rotating shaft 212, and a first movable blade 213. The first fixed blade 211 is fixedly mounted on the crossbeam 12 of the shuttle box 1. The first rotating shaft 212 passes through the crossbeam 12 of the shuttle box 1, that is, the top of the first rotating shaft 212 extends at the top of the crossbeam 12 of the shuttle box 1, and the bottom extends at the bottom of the crossbeam 12 of the shuttle box 1. The first fixed blade 211 is fixedly mounted on the top of the first rotating shaft 212. One end of the first linkage assembly 22 is connected to the bottom of the first rotating shaft 212, and the other end is connected to the wire cutting pull rod 5.

[0047] Therefore, when the first needle cutting assembly 2 cuts the thread, it first moves laterally in a straight line through the thread cutting lever 5, so that the thread cutting lever 5 drives the first rotating shaft 212 to rotate on the crossbeam 12 of the shuttle box 1 through the first linkage assembly 22, thereby driving the first moving blade 213 at the top of the first rotating shaft 212 to rotate away from the first fixed blade 211, so that the first moving blade 213 and the first fixed blade 211 open up.

[0048] Then, the thread-cutting lever 5 moves in the opposite direction in a straight line, causing the thread-cutting lever 5 to drive the first rotating shaft 212 to rotate in the opposite direction on the crossbeam 12 of the shuttle box 1 via the first linkage component 22. This causes the first moving blade 213 at the top of the first rotating shaft 212 to rotate towards the first fixed blade 211, so that the first moving blade 213 and the first fixed blade 211 close together, thereby cutting the thread between the first moving blade 213 and the first fixed blade 211, thus realizing the thread cutting of the first needle thread-cutting component 2.

[0049] Furthermore, in this embodiment, the first needle-cutting assembly 2 also includes a first guide seat 23, which is disposed below the crossbeam 12 of the shuttle box 1 and is fixedly connected to the shuttle box 1. After passing through the crossbeam 12 of the shuttle box 1, the first rotating shaft 212 continues to pass through the first guide seat 23, so that the top of the first rotating shaft 212 extends at the top of the crossbeam 12 of the shuttle box 1, and the bottom extends at the bottom of the first guide seat 23.

[0050] During the lateral linear movement of the thread-cutting lever 5, which drives the first rotating shaft 212 to rotate via the first linkage component 22, the crossbeam 12 of the shuttle box 1 limits and guides the rotation of the first rotating shaft 212 from above, and the first guide seat 23 limits and guides the rotation of the first rotating shaft 212 from below, thereby preventing the first rotating shaft 212 from swaying during rotation and ensuring the stability of the thread-cutting action of the first needle thread-cutting component 2.

[0051] It is foreseeable that, since the first rotating shaft 212 passes vertically through the first guide seat 23, a through hole for the first rotating shaft 212 to pass through is provided on the first guide seat 23. In this application, the first needle cutting assembly 2 also includes a first bearing sleeve, which is disposed between the first rotating shaft 212 and the through hole of the first guide seat 23.

[0052] Specifically, the outer ring of the first bearing sleeve is fixedly connected to the outer wall of the first rotating shaft 212, and the inner ring is fixedly connected to the inner wall of the through hole of the first guide seat 23. Thus, the first rotating shaft 212 and the first guide seat 23 are rotated through the rolling elements between the outer and inner rings of the first bearing sleeve, while preventing the first rotating shaft 212 from moving vertically on the first guide seat 23, thereby further ensuring the stability of the thread cutting action of the first needle cutting assembly 2.

[0053] Specifically, in this embodiment, the first linkage assembly 22 includes a first linkage seat 221, a first connecting rod 222, and a second connecting rod 223. The first connecting seat is fixedly connected to the wire-cutting pull rod 5, and one end of the first connecting rod 222 is fixedly connected to the bottom of the first rotating shaft 212. One end of the second connecting rod 223 is rotatably connected to the first linkage seat 221, and the other end is rotatably connected to the other end of the first connecting rod 222.

[0054] Taking the direction facing the front of the double-needle computerized embroidery machine as an example, in this embodiment, the working principle of the first needle thread cutting assembly 2 is as follows: First, the thread cutting lever 5 moves to the right in a straight line under the action of external force, driving the first linkage seat 221 to move to the right in a straight line in sync. Under the drive of the first linkage seat 221, the second linkage 223 and the first linkage 222 push the first rotating shaft 212 to rotate counterclockwise around its own axis. During this process, the first rotating shaft 212 drives the first moving blade 213 to rotate in a direction away from the first fixed blade 211, so that the first moving blade 213 and the first fixed blade 211 open up.

[0055] Then, the thread-cutting lever 5 is moved to the left in a straight line under the action of external force, which drives the first linkage seat 221 to move to the left in a straight line in a synchronized manner. Driven by the first linkage seat 221, the second linkage 223 and the first linkage 222 push the first rotating shaft 212 to rotate clockwise around its own axis. During this process, the first rotating shaft 212 drives the first moving blade 213 to rotate towards the first fixed blade 211, so that the first moving blade 213 and the first fixed blade 211 close together, thereby cutting the thread between the first moving blade 213 and the first fixed blade 211, thus realizing the thread cutting of the first needle thread-cutting assembly 2.

[0056] Specifically, in this embodiment, the second needle thread cutting assembly 3 includes a second scissor assembly 31 and a second linkage assembly 32. The second scissor assembly 31 is disposed on the thread cutting fixing plate 4, and the second linkage assembly 32 connects the second scissor assembly 31 to the thread cutting pull rod 5. Thus, when the thread cutting pull rod 5 moves laterally in a straight line, the second linkage assembly 32 drives the second scissor assembly 31 to perform a thread cutting action, thereby realizing the cutting of the thread of the other needle of the double needle machine head by the second needle thread cutting assembly 3.

[0057] Specifically, in this embodiment, the second scissor assembly 31 includes a second fixed blade 311, a second rotating shaft 312, and a second movable blade 313. The second fixed blade 311 is fixedly mounted on the wire-cutting fixing plate 4. The second rotating shaft 312 extends vertically through the wire-cutting fixing plate 4, with its top extending at the top of the wire-cutting fixing plate 4 and its bottom extending at the bottom of the wire-cutting fixing plate 4. The second movable blade 313 is fixedly mounted on the top of the second rotating shaft 312. One end of the second linkage assembly 32 is connected to the bottom of the second rotating shaft 312, and the other end is connected to the wire-cutting pull rod 5.

[0058] When the second needle thread cutting assembly 3 cuts the thread, it first moves laterally in a straight line through the thread cutting lever 5, so that the thread cutting lever 5 drives the second rotating shaft 312 to rotate on the crossbeam 12 of the shuttle box 1 through the second linkage assembly 32, thereby driving the second moving blade 313 at the top of the second rotating shaft 312 to rotate away from the second fixed blade 311, so that the second moving blade 313 and the second fixed blade 311 open.

[0059] Then, the thread-cutting lever 5 moves in the opposite direction in a straight line, causing the thread-cutting lever 5 to drive the second rotating shaft 312 to rotate in the opposite direction on the crossbeam 12 of the shuttle box 1 via the second linkage assembly 32. This causes the second moving blade 313 at the top of the second rotating shaft 312 to rotate towards the second fixed blade 311, so that the second moving blade 313 and the second fixed blade 311 close together, thereby cutting the thread between the second moving blade 313 and the second fixed blade 311, thus realizing the thread cutting of the second needle thread-cutting assembly 3.

[0060] Furthermore, in this embodiment, the second needle thread cutting assembly 3 also includes a second guide seat 33, which is disposed below the thread cutting fixing plate 4 and fixedly connected to the shuttle box 1. After penetrating the thread cutting fixing plate 4, the second rotating shaft 312 continues to penetrate the second guide seat 33, so that the top of the second rotating shaft 312 extends at the top of the thread cutting fixing plate 4 and the bottom extends at the bottom of the second guide seat 33.

[0061] During the lateral linear movement of the thread-cutting lever 5, which drives the second rotating shaft 312 to rotate via the second linkage assembly 32, the thread-cutting fixing plate 4 limits and guides the rotation of the first rotating shaft 212 from above, and the second guide seat 33 limits and guides the rotation of the second rotating shaft 312 from below, thereby preventing the second rotating shaft 312 from swaying during rotation and ensuring the stability of the thread-cutting action of the second needle thread-cutting assembly 3.

[0062] It is foreseeable that, since the second rotating shaft 312 passes vertically through the second guide seat 33, a through hole for the second rotating shaft 312 to pass through is provided on the second guide seat 33. In this application, the second needle cutting assembly 3 also includes a second bearing sleeve, which is disposed between the second rotating shaft 312 and the through hole of the second guide seat 33.

[0063] Specifically, the outer ring of the second bearing sleeve is fixedly connected to the outer wall of the second rotating shaft 312, and the inner ring is fixedly connected to the inner wall of the through hole of the second guide seat 33. Thus, the second rotating shaft 312 and the second guide seat 33 are rotated through the rolling elements between the outer and inner rings of the second bearing sleeve, while preventing the second rotating shaft 312 from moving vertically on the second guide seat 33, thereby further ensuring the stability of the thread cutting action of the second needle cutting assembly 3.

[0064] Specifically, in this embodiment, the second linkage component 32 includes a wire-cutting synchronization rod 321 and two connecting rods 322. The wire-cutting synchronization rod 321 is arranged parallel to and spaced apart from the wire-cutting pull rod 5, and is located behind the wire-cutting pull rod 5. The two connecting rods 322 respectively fix the two ends of the wire-cutting synchronization rod 321 to the wire-cutting pull rod 5, so that when the wire-cutting pull rod 5 moves laterally in a straight line, it drives the wire-cutting synchronization rod 321 to move laterally in a straight line in a synchronized manner.

[0065] The second linkage assembly 32 also includes a second linkage seat 323, a third link 324 and a fourth link 325. The second linkage seat 323 is fixedly connected to the wire cutting synchronization rod 321. One end of the third link is fixedly connected to the bottom of the second rotating shaft 312. One end of the fourth link 325 is rotatably connected to the second linkage seat 323 and the other end is rotatably connected to the other end of the third link.

[0066] Taking the direction facing the front of the double-needle computerized embroidery machine as an example, in this embodiment, the working principle of the second needle thread cutting assembly 3 is as follows: First, the thread cutting lever 5 moves to the right in a straight line under the action of external force. The thread cutting lever 5 drives the thread cutting synchronization lever 321 to move to the right in a straight line in sync. The thread cutting synchronization lever 321 drives the second linkage seat 323 to move to the right in a straight line in sync. Under the drive of the second linkage seat 323, the fourth linkage 325 and the third linkage 324 push the second rotating shaft 312 to rotate clockwise around its own axis. During this process, the second rotating shaft 312 drives the second moving blade 313 to rotate in a direction away from the second fixed blade 311, so that the second moving blade 313 and the second fixed blade 311 open up.

[0067] Then, the thread-cutting lever 5 moves linearly to the left under the action of external force. The thread-cutting lever 5 drives the thread-cutting synchronization lever 321 to move linearly to the left in sync. The thread-cutting synchronization lever 321 drives the second linkage seat 323 to move linearly to the left in sync. Driven by the second linkage seat 323, the fourth linkage 325 and the third linkage 324 push the second rotating shaft 312 to rotate counterclockwise around its own axis. During this process, the second rotating shaft 312 drives the second moving blade 313 to rotate towards the second fixed blade 311, so that the second moving blade 313 and the second fixed blade 311 close together, thereby cutting the thread between the second moving blade 313 and the second fixed blade 311, realizing the thread cutting of the second needle thread-cutting assembly 3.

[0068] The above-described contents can be implemented individually or in combination in various ways, and all such variations are within the protection scope of this utility model.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A thread-cutting mechanism for a multi-head embroidery machine, the multi-head embroidery machine comprising a shuttle box (1), at least two double-needle heads located above the shuttle box (1), and an embroidery frame disposed between the shuttle box (1) and the double-needle heads, the embroidery frame comprising a front stop component disposed on the front side of the shuttle box (1), a rear stop component disposed on the rear side of the shuttle box (1), and a plurality of intermediate connecting members connecting the front stop component and the rear stop component, the shuttle box (1) being provided with a plurality of intermediate connecting grooves (11) corresponding to the accommodating portions of the plurality of intermediate connecting members, characterized in that: The device includes at least two thread-cutting devices disposed on the shuttle box body (1), each corresponding to the thread cutting of at least two double-needle heads; the thread-cutting device includes a first needle thread-cutting assembly (2), a second needle thread-cutting assembly (3), and a thread-cutting fixing plate (4). The first needle thread-cutting assembly (2) is disposed on the crossbeam (12) of the shuttle box body (1). The thread-cutting fixing plate (4) is fixedly connected to the shuttle box body (1) and is spaced laterally from the crossbeam (12) of the shuttle box body (1). The second needle thread-cutting assembly (3) is disposed on the thread-cutting fixing plate (4). The thread-cutting fixing plate (4) is located on one side of the intermediate connecting groove (11), so that the second needle thread-cutting assembly (3) avoids the location of the intermediate connecting groove (11).

2. The thread-cutting mechanism for a multi-head embroidery machine as described in claim 1, characterized in that: The thread cutting mechanism also includes a thread cutting lever (5) extending laterally on the front side of the shuttle box (1). The thread cutting lever (5) can move laterally in a straight line, thereby driving the first needle thread cutting assembly (2) and the second needle thread cutting assembly (3) to perform thread cutting actions.

3. The thread-cutting mechanism for a multi-head embroidery machine as described in claim 2, characterized in that: The first needle thread cutting assembly (2) includes a first scissor assembly (21) disposed on the crossbeam (12) of the shuttle box body (1), and a first linkage assembly (22) connecting the first scissor assembly (21) and the thread cutting lever (5). The thread cutting lever (5) drives the first scissor assembly (21) to perform thread cutting action through the first linkage assembly (22).

4. The thread-cutting mechanism for a multi-head embroidery machine as described in claim 3, characterized in that: The first scissor assembly (21) includes a first fixed blade (211) disposed on the crossbeam (12) of the shuttle box body (1), a first rotating shaft (212) passing through the crossbeam (12) of the shuttle box body (1), and a first moving blade (213) disposed on the top of the first rotating shaft (212). One end of the first linkage assembly (22) is connected to the bottom of the first rotating shaft (212), and the other end is connected to the wire cutting rod (5).

5. A thread-cutting mechanism suitable for a multi-head embroidery machine as described in claim 4, characterized in that: The first needle-cutting assembly (2) also includes a first guide seat (23) located below the crossbeam (12) of the shuttle box (1). The first guide seat (23) is fixedly connected to the shuttle box (1). The first rotating shaft (212) passes through the first guide seat (23). The first guide seat (23) guides the rotation of the first rotating shaft (212).

6. A thread-cutting mechanism suitable for a multi-head embroidery machine as described in claim 4, characterized in that: The first linkage assembly (22) includes a first linkage seat (221) fixedly connected to the wire-cutting pull rod (5), a first connecting rod (222) fixedly connected to the bottom of the first rotating shaft (212), and a second connecting rod (223) with one end rotatably connected to the first linkage seat (221) and the other end rotatably connected to the first connecting rod (222).

7. A thread-cutting mechanism for a multi-head embroidery machine as described in claim 2, characterized in that: The second needle thread cutting assembly (3) includes a second scissor assembly (31) disposed on the thread cutting fixing plate (4), and a second linkage assembly (32) connecting the second scissor assembly (31) and the thread cutting pull rod (5). The thread cutting pull rod (5) drives the second scissor assembly (31) to perform thread cutting action through the second linkage assembly (32).

8. A thread-cutting mechanism suitable for a multi-head embroidery machine as described in claim 7, characterized in that: The second scissor assembly (31) includes a second fixed blade (311) disposed on the wire cutting fixing plate (4), a second rotating shaft (312) passing through the wire cutting fixing plate (4), and a second moving blade (313) disposed on the top of the second rotating shaft (312). One end of the second linkage assembly (32) is connected to the bottom of the second rotating shaft (312), and the other end is connected to the wire cutting pull rod (5).

9. A thread-cutting mechanism suitable for a multi-head embroidery machine as described in claim 8, characterized in that: The second needle cutting assembly (3) also includes a second guide seat (33) located below the cutting fixing plate (4). The second guide seat (33) is fixedly connected to the shuttle box (1). The second rotating shaft (312) passes through the second guide seat (33), and the second guide seat (33) guides the rotation of the second rotating shaft (312).

10. A thread-cutting mechanism for a multi-head embroidery machine as described in claim 8, characterized in that: The second linkage assembly (32) includes a wire-cutting synchronization rod (321) arranged parallel to and spaced apart from the wire-cutting pull rod (5), two connecting rods (322) that are fixedly connected to the two ends of the wire-cutting synchronization rod (321) and the wire-cutting pull rod (5), a second linkage seat (323) fixedly connected to the wire-cutting synchronization rod (321), a third connecting rod (324) fixedly connected to the bottom of the second rotating shaft (312), and a fourth connecting rod (325) that is rotatably connected at one end to the second linkage seat (323) and rotatably connected at the other end to the third connecting rod (324).

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