A rotating shuttle device for embroidery machine suitable for thick thread and a thread passing method thereof

Abstract

A rotary shuttle device for embroidery machines using coarse thread includes a shuttle box and a rotary shuttle assembly mounted on the shuttle box. The rotary shuttle assembly includes a coaxially arranged rotary shuttle outer shell and a rotary shuttle inner shell, which rotate independently. The shuttle box drives the rotary shuttle outer shell to rotate, and the shuttle box is provided with a positioning element for positioning the rotary shuttle inner shell. The top of the rotary shuttle inner shell has a bottom thread groove and a coarse thread groove. The positioning element has a positioning block located at the opening of the coarse thread groove, and there is a swing gap between the positioning block and the coarse thread groove to facilitate the swinging of the rotary shuttle inner shell. Compared with the prior art, by setting the positioning block and the driving assembly, the rotary shuttle inner shell can swing during the rotation of the rotary shuttle outer shell, thereby forming the thread gap at the coarse thread groove on one side of the positioning block, and the formation of the thread gap can be adjusted in stages to meet the thread passing requirements of coarse thread.

Description

Technical Field

[0001] This invention relates to the field of embroidery machine technology, and specifically to a rotary shuttle device for embroidery machines suitable for thick threads and a thread-passing method thereof. Background Technology

[0002] The shuttle box of an embroidery machine is an indispensable part of a computerized embroidery machine. The shuttle box mainly performs actions such as embroidery looping, thread fastening, and thread cutting. Among these actions, looping is an essential part of the embroidery process. Currently, computerized embroidery machine shuttle boxes use conventional thread. When using thicker thread, the increased resistance during thread passage leads to an increased thread breakage rate and a decrease in the quality of the embroidery.

[0003] Chinese Announcement No. CN216304128U discloses a thick-thread skip-seam structure for a computerized pattern sewing machine, comprising a computerized pattern sewing machine, a pattern sewing machine head, a base frame groove, a shaft groove, a shuttle bed groove, a shaft groove cover plate, a universal joint steering groove, a guide rail bracket, a hydraulic cylinder, a universal drive shaft, a cross universal joint, a double-headed fork overlapping shaft, a drive shaft, a drive shaft positioning block, a sewing needle mechanism, a thick-thread shuttle bed, and a fixed-width thread cutter, etc., achieving a scientifically reasonable, simple, and stable design for the thick-thread skip-seam structure of the computerized pattern sewing machine.

[0004] The computerized embroidery machine disclosed above uses a short and bottle-shaped rotary hook shell at the tail, without a raised section for the guide loop to facilitate the release of thick thread. However, in actual use, since the rotary hook shell does not have a raised section for the guide loop at the tail, the thick thread increases in size after forming a loop, which poses a risk of the thick thread getting stuck inside the rotary hook shell, thus affecting the thread breakage rate of the embroidery machine and the quality of the embroidery. Summary of the Invention

[0005] The present invention aims to overcome the defects in the prior art and provide a rotary shuttle device for embroidery machines with a compact structure, low thread breakage rate, and guaranteed embroidery quality, suitable for thick threads, and a thread guiding method thereof.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a rotary shuttle device for embroidery machines using coarse thread, comprising a shuttle box and a rotary shuttle assembly mounted on the shuttle box. The rotary shuttle assembly includes a coaxially arranged rotary shuttle outer shell and a rotary shuttle inner shell, which rotate independently. The shuttle box drives the rotary shuttle outer shell to rotate, and the shuttle box is provided with a positioning element for positioning the rotary shuttle inner shell. The top of the rotary shuttle inner shell has a bottom thread groove and a coarse thread groove, and the positioning element has a positioning block disposed at the opening of the coarse thread groove, with a swing gap between the positioning block and the coarse thread groove to facilitate the swinging of the rotary shuttle inner shell. The bottom of the rotary shuttle inner shell has a guide block, and the shuttle box is provided with a drive assembly for moving the guide block.

[0007] As a preferred embodiment of the present invention, the outer shell of the shuttle is rotatably connected to the inner shell of the shuttle, a guide rail is formed on the outer wall of the inner shell of the shuttle along the circumferential direction of the outer wall of the inner shell of the shuttle, and a guide groove adapted to the guide rail is formed inside the outer shell of the shuttle.

[0008] As a preferred embodiment of the present invention, a support shaft for supporting the bottom thread is formed in the middle of the inner shell of the rotary hook, a guide protrusion is formed at the top of the inner shell of the rotary hook, a thick thread through-line groove is formed on the guide protrusion, and a bottom thread through-line groove is formed at the connection between the guide protrusion and the inner shell of the rotary hook.

[0009] As a preferred embodiment of the present invention, the thick wire guide groove has a top opening and a side opening located on the guide protrusion, a positioning block is disposed at the side opening, and the top opening is located above the opening of the bottom wire guide groove.

[0010] As a preferred embodiment of the present invention, the side openings located on both sides of the positioning block form a swing gap, and the top opening end forms an extended opening arranged in the circumferential direction of the inner shell of the rotary shuttle.

[0011] As a preferred embodiment of the present invention, the side opening gradually increases in size from top to bottom along the height direction of the guide protrusion.

[0012] As a preferred embodiment of the present invention, the guide block has an arcuate surface on both sides facing the rotation direction of the shuttle shell and a pushing plane that facilitates contact with the drive assembly.

[0013] As a preferred embodiment of the present invention, a rotary hook shell for guiding the movement of the thick thread is formed on the rotary hook shell, and a connector for facilitating the rotation of the rotary hook shell is formed at the end of the rotary hook shell.

[0014] As a preferred embodiment of the present invention, the drive assembly includes a drive motor and a mounting plate connected to the output shaft of the drive motor, and the mounting plate is provided with a wire hook for moving the guide block.

[0015] A method for guiding thread using a rotary hook device for a coarse thread embroidery machine, comprising the following steps:

[0016] Step A: The shuttle box body drives the rotary shuttle shell to rotate, and during the rotation of the rotary shuttle shell, the thick line is pulled through the rotary shuttle line shell. At this time, the line hook is in the open state and does not interfere with the movement of the thick line.

[0017] Step B: Under the traction of the rotary hook shell, the thicker thread passes through the guide block, detaches from the rotary hook shell, and forms a loop;

[0018] Step C: The drive motor moves the line hook, and the line hook moves the guide block to achieve the swing of the inner shell of the rotary hook. The swing direction of the inner shell of the rotary hook is opposite to the rotation direction of the outer shell of the rotary hook.

[0019] Step D: By swinging the inner shell of the rotary hook, a gap is formed on one side of the positioning block to facilitate the passage of the thick wire in the ring setting;

[0020] Step E: The thicker wire, which forms a loop, passes through the gap between the wires and forms a loop with the bottom wire that passes through the bottom wire groove.

[0021] Step F: Repeat steps A through E until the embroidery is complete.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting the positioning block and the driving component, the inner shell of the rotary hook can swing during the rotation of the outer shell of the rotary hook, thereby forming the wire passage gap at the wire passage groove of the thick wire on one side of the positioning block, and the formation of the wire passage gap can be adjusted in stages to meet the wire passage requirements of the thick wire. At the same time, the setting of the guide block not only satisfies the traction and guidance effect of the thick wire, but also plays a role in cooperating with the driving component to realize the swinging effect of the rotary hook outer shell. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a side view of the present invention;

[0025] Figure 3 This is an exploded view of the present invention;

[0026] Figure 4 This is a schematic diagram of the rotary shuttle assembly;

[0027] Figure 5 This is the main view of the rotary hook component;

[0028] Figure 6 This is a schematic diagram of the inner shell of the rotary shuttle;

[0029] Figure 7 yes Figure 6 A magnified view of a section at point A in the middle;

[0030] Figure 8 yes Figure 6 A magnified view of a section at point B in the middle;

[0031] Figure 9 This is a top view of the inner shell of the rotary shuttle;

[0032] Figure 10 This is a schematic diagram of the rotary shuttle's outer shell;

[0033] Figure 11This is a top view of the rotary shuttle's outer casing;

[0034] Figure 12 yes Figure 11 A cross-sectional view of the AA plane;

[0035] Figure 13 This is a structural schematic diagram of the positioning component;

[0036] Figure 14 This is a schematic diagram of the driver component;

[0037] Reference numerals: 1. Shuttle box body; 2. Shuttle assembly; 3. Shuttle outer shell; 31. Connector; 32. Shuttle line shell; 33. Guide groove; 4. Shuttle inner shell; 41. Support shaft; 42. Guide block; 421. Arc surface; 422. Pushing plane; 43. Guide protrusion; 44. Bottom line groove; 45. Thick line groove; 46. Swing clearance; 461. Top opening; 47. Side opening; 48. Extension opening; 49. Drive assembly; 51. Drive motor; 52. Mounting plate; 53. Line hook; 6. Positioning component; 61. Positioning block. Detailed Implementation

[0038] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] like Figures 1-14 As shown, a rotary shuttle device for embroidery machines using coarse thread includes a shuttle box 1 and a rotary shuttle assembly 2 mounted on the shuttle box 1. The rotary shuttle assembly 2 includes a rotary shuttle outer shell 3 and a rotary shuttle inner shell 4 coaxially arranged, with the rotary shuttle outer shell 3 and the rotary shuttle inner shell 4 rotating independently. The shuttle box 1 drives the rotary shuttle outer shell 3 to rotate, and the shuttle box 1 is provided with a positioning element 6 for positioning the rotary shuttle inner shell 4. The top of the rotary shuttle inner shell 4 forms a bottom thread groove 45 and a coarse thread groove 46. The positioning element 6 forms a positioning block 61 located at the opening of the coarse thread groove 46, and there is a swing gap 461 between the positioning block 61 and the coarse thread groove 46 to facilitate the swinging of the rotary shuttle inner shell 4. The bottom of the rotary shuttle inner shell 4 forms a guide block 42, and the shuttle box 1 is provided with a drive assembly 5 for moving the guide block 42.

[0040] The shuttle box 1 may be provided with a rotating shaft for driving the shuttle outer shell 3 to rotate. The rotating shaft is coaxial with the center line of the shuttle outer shell 3 and the shuttle inner shell 4. During the rotation of the shuttle outer shell 3, the shuttle inner shell 4 is restricted to rotate synchronously under the action of the positioning member 6, and the rotation of the positioning block 61 makes the shuttle inner shell 4 relatively stationary.

[0041] The bottom thread groove 45 is used for bottom thread passing, and the thick thread groove 46 is used for thick thread passing. The bottom thread groove 45 and the thick thread groove 46 are complementary and do not interfere with each other, ensuring that the bottom thread and the thick thread are knotted to form a loop only after leaving the rotary hook assembly 2.

[0042] The outer shell 3 of the shuttle is rotatably connected to the inner shell 4 of the shuttle. A guide rail 43 is formed on the outer wall of the inner shell 4 along the circumferential direction of the outer wall of the inner shell 4. A guide groove 33 is formed inside the outer shell 3 to match the guide rail 43. Under the action of the guide rail 43 and the guide groove 33, the rotation of the outer shell 3 on the inner shell 4 of the shuttle is more stable.

[0043] A support shaft 41 for supporting the bottom line is formed in the middle of the inner shell 4 of the rotary shuttle, a guide protrusion 44 is formed at the top of the inner shell 4 of the rotary shuttle, a thick line groove 46 is formed on the guide protrusion 44, and a bottom line groove 45 is formed at the connection between the guide protrusion 44 and the inner shell 4 of the rotary shuttle.

[0044] The bottom thread loop can be sleeved on the support shaft 41. During the movement of the fabric in the embroidery machine, it drives the bottom thread to move. Thus, the bottom thread is released on the bottom thread loop by the rotation of the bottom thread loop on the support shaft 41. The guide protrusion 44 is used to guide the thick thread.

[0045] The thick wire guide groove 46 has a top opening 47 and a side opening 48 located on the guide protrusion 44. The positioning block 61 is located at the side opening 48, and the top opening 47 is located above the opening of the bottom wire guide groove 45.

[0046] The top opening 47 is the outlet of the coil. By setting the top opening 47 above the opening of the bottom thread groove 45, it is ensured that the looped thick thread will not come into contact with the bottom thread inside the inner shell 4 of the rotary hook, thereby preventing the looped thick thread from forming a coil with the bottom thread inside the inner shell 4 of the rotary hook.

[0047] The side openings 46 on both sides of the positioning block 61 form a swing gap 461, and the top opening 47 has an extended opening 49 at its end that is arranged in the circumferential direction of the inner shell 4 of the rotary shuttle. Under the action of the swing gap 461, since the positioning block 61 is always in a relatively static state, by changing the swing position of the inner shell 4 of the rotary shuttle, when the positioning block 61 abuts against the inner shell 4 of the rotary shuttle, a gap is formed on the other side of the positioning block 61 that facilitates the passage of the thick line arranged in a ring.

[0048] The expansion opening 49 is set along the rotation direction of the rotary hook housing 3. Under the action of the expansion opening 49, the top opening 47 is expanded, which facilitates the passage of the thick line arranged in a ring through the top opening 47.

[0049] The side opening 48 gradually increases in size from top to bottom along the height direction of the guide protrusion 44. The side opening is used to guide the thick wire arranged in a ring. Under the action of the side opening 48, the ring size formed by the thick wire arranged in a ring gradually decreases, so that the thick wire arranged in a ring can pass through the top opening 47.

[0050] The guide block 42 has an arc-shaped surface 421 facing the rotation direction of the shuttle shell 3 and a pushing surface 422 that facilitates contact with the drive assembly 5 on both sides. The arc-shaped surface 421 is arranged along the axial direction of the inner shell 4 of the shuttle, and the arc-shaped surface 421 is inclined towards the outside of the inner shell 4 along the rotation direction of the shuttle shell 3.

[0051] The arc-shaped surface 421 is used to contact the thick line pulled by the shuttle shell 3. Under the action of the arc-shaped surface 421, the thick line pulled by the shuttle shell 3 is guided along the length direction of the arc-shaped surface 421, thereby guiding the thick line to the outside of the inner shell 4 of the shuttle, preventing the thick line from interfering with the bottom line, and also facilitating the pulling of the thick line to the side opening 48.

[0052] The rotary shuttle housing 3 has a rotary shuttle wire housing 32 for guiding the movement of the thick wire, and a connector 31 is formed at the end of the rotary shuttle housing 3 to facilitate the rotation of the rotary shuttle housing 3. The connector 31 is used to connect to the rotating shaft of the shuttle box 1.

[0053] The drive assembly 5 includes a drive motor 51 and a mounting plate 52 connected to the output shaft of the drive motor 51. The mounting plate 52 is provided with a wire hook 53 for moving the guide block 42.

[0054] The mounting plate 52 is clamped to the output shaft of the drive motor 51, and the mounting plate 52 rotates synchronously with the output shaft of the drive motor 51. The wire hook 53 is fixedly connected to the mounting plate 52, and the wire hook 53 is set along the radial direction of the output shaft of the drive motor 51. Under the action of the rotation of the output shaft of the drive motor 51, the synchronous rotation of the mounting plate 52 and the synchronous swing of the wire hook 53 are realized.

[0055] A method for guiding thread using a rotary hook device for a coarse thread embroidery machine, comprising the following steps:

[0056] Step A: The shuttle box 1 drives the rotary shuttle housing 3 to rotate, and during the rotation of the rotary shuttle housing 3, the thick line is pulled through the rotary shuttle line housing 32. At this time, the line passer 53 is in the open state and does not interfere with the movement of the thick line.

[0057] The shuttle box 1 drives the shuttle outer shell 3 to rotate counterclockwise. At this time, the inner shell 4 of the shuttle is in a relatively stationary state under the action of the positioning block 61. During the rotation of the shuttle outer shell 3, the thick line is pulled through the shuttle line shell 32 to the guide block 42. The line hook 53 is not located on the moving path of the shuttle outer shell 3 under the action of the drive motor 51.

[0058] Step B: Under the traction of the rotary hook shell 32, the thick thread passes through the guide block 42 and then detaches from the rotary hook shell 32 and forms a loop. The thick thread is pulled downward by the rotary hook shell 32, thus pulling the thick thread. When the rotary hook shell 32 rotates to the bottom of the rotary hook shell 3, the thick thread rebounds under its own elastic force, thus detaching from the rotary hook shell 32 and forming a loop structure.

[0059] Step C: Drive motor 51 to move line hook 53, and under the action of line hook 53, drive guide block 42 to move to realize the swing of inner shell 4 of shuttle. The swing direction of inner shell 4 of shuttle is opposite to the rotation direction of outer shell 3 of shuttle.

[0060] After the thick thread leaves the rotary hook housing 32, the drive motor 51 drives the oscillation of the thread guide hook 53. Under the action of the thread guide hook 53 abutting against the guide block 42, the oscillation of the thread guide hook 53 drives the guide block 42 to move, thereby causing the rotary hook inner housing 4 to oscillate. Since the oscillation direction of the rotary hook inner housing 4 is opposite to the rotation direction of the rotary hook outer housing 3, it is ensured that the rotary hook inner housing 4 achieves stable oscillation under the action of the thread guide hook 53, and the friction between the rotary hook inner housing 4 and the rotary hook outer housing 3 affects the oscillation of the rotary hook inner housing 4.

[0061] Step D: The swing of the inner shell 4 of the rotary hook forms a gap on one side of the positioning block 61 to facilitate the passage of the thick wire in a ring. The swing of the inner shell 4 of the rotary hook concentrates the gap between the thick wire groove 46 and the positioning block 61, thereby facilitating the passage of the thick wire.

[0062] Step E: The thicker wire, which forms a loop, passes through the wire gap and then forms a loop with the bottom wire passing through the bottom wire groove 45;

[0063] Step F: Repeat steps A through E until the embroidery is complete.

[0064] During steps A-E, the outer shell 3 of the rotary hook is always rotating, while the inner shell 4 of the rotary hook is swinging. The inner shell 4 rotates counterclockwise under the friction of the outer shell 3, and rotates clockwise under the action of the thread hook 53, thereby realizing the swing of the inner shell 4. This ensures that the gap size of the thick thread groove 46 is adjusted in stages as the inner shell 4 of the rotary hook swings, meeting the requirements for thick thread passing while achieving reset without affecting the normal operation of the outer shell 3.

[0065] Meanwhile, the positioning element 6 is a rod-shaped structure. At this time, the thick wire passage groove 46 cannot meet the requirements of the thick wire passage. Under the extrusion action, the positioning element 6 can be deformed, increasing the wire passage gap size formed at the thick wire passage groove 46, thus meeting the requirements of the thick wire passage.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0067] Although this document frequently uses reference numerals from the accompanying drawings, such as shuttle box 1, shuttle assembly 2, shuttle outer shell 3, connector 31, shuttle line shell 32, guide groove 33, shuttle inner shell 4, support shaft 41, guide block 42, arc surface 421, pushing plane 422, guide rail 43, guide protrusion 44, bottom thread guide groove 45, thick thread guide groove 46, swing clearance 461, top opening 47, side opening 48, expansion opening 49, drive assembly 5, drive motor 51, mounting plate 52, thread hook 53, positioning element 6, and positioning block 61, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A rotating shuttle device for an embroidery machine suitable for use with a thick thread, comprising a shuttle box and a rotating shuttle assembly mounted to the shuttle box, characterised in that, The shuttle assembly includes a coaxially arranged shuttle outer shell and shuttle inner shell, which rotate independently. The shuttle housing contains a rotating shaft for rotating the shuttle outer shell, and a positioning element for positioning the shuttle inner shell. The top of the shuttle inner shell has a bottom thread groove and a thick thread groove. The positioning element has a positioning block located at the opening of the thick thread groove, and a swing gap exists between the positioning block and the thick thread groove to facilitate the swinging of the shuttle inner shell. A guide protrusion is formed at the bottom of the shuttle inner shell, and a drive assembly for moving the guide protrusion is provided within the shuttle housing. A support shaft for supporting the bottom thread is formed in the middle of the shuttle inner shell, and a guide is formed at the top of the shuttle inner shell. A protrusion is formed on the guide protrusion, and a bottom thread groove is formed at the connection between the guide protrusion and the inner shell of the rotary hook. The bottom thread groove has a top opening and a side opening on the guide protrusion, and a positioning block is disposed at the side opening. The side openings on both sides of the positioning block form a swing gap, and the end of the top opening forms an extended opening along the circumferential direction of the inner shell of the rotary hook. The side openings gradually increase in size from top to bottom along the height direction of the guide protrusion. A rotary hook shell for guiding the movement of the bottom thread is formed on the outer shell of the rotary hook. The drive assembly includes a drive motor and a mounting plate connected to the output shaft of the drive motor. The mounting plate is provided with a thread hook for moving the guide protrusion.

2. The rotary shuttle device for an embroidery machine suitable for thick threads according to claim 1, characterized in that, The top opening is located above the opening of the bottom wire groove.

3. The rotary shuttle device for an embroidery machine suitable for thick threads according to claim 1, characterized in that, The guide protrusion has an arc-shaped surface on each side facing the rotation direction of the shuttle housing and a pushing plane that facilitates contact with the drive assembly.

4. A thread-feeding method for the rotary hook device of an embroidery machine suitable for thick threads, characterized in that, The rotary hook device for embroidery machines using thick threads as described in any one of claims 1-3 includes the following steps: Step A: The shuttle box body drives the rotary shuttle shell to rotate, and the thick line is pulled through the rotary shuttle line shell in the rotary shuttle shell. At this time, the line hook is in the open state and does not interfere with the movement of the thick line. Step B: Under the traction of the rotary hook shell, the thick thread passes through the guide protrusion, detaches from the rotary hook shell, and forms a loop; Step C: The drive motor moves the line hook, and the line hook moves the guide protrusion to make the inner shell of the rotary hook swing. The swing direction of the inner shell of the rotary hook is opposite to the rotation direction of the outer shell of the rotary hook. Step D: By swinging the inner shell of the rotary hook, a gap is formed on one side of the positioning block to facilitate the passage of the thick wire in the ring setting; Step E: The thicker wire, which forms a loop, passes through the gap between the wires and forms a loop with the bottom wire that passes through the bottom wire groove. Step F: Repeat steps A through E until the embroidery is complete.

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