Automatic shuttle changing device for a sewing machine

Abstract

This application relates to an automatic shuttle changing device for a sewing machine, belonging to the technical field of sewing machines. It includes a shuttle changing mechanism, a feeding mechanism, and a loading mechanism. The shuttle changing mechanism and the feeding mechanism are mounted on the sewing machine. The loading mechanism includes a mounting component and a loading tray, which is detachably connected to the feeding mechanism via the mounting component. The loading tray stores shuttle cases. The shuttle changing mechanism is used to replace shuttle cases on the sewing machine, and the feeding mechanism is used to transport the loading tray to the shuttle changing mechanism. The mounting component includes a torsion bar, which is mounted on the feeding mechanism. The torsion bar has a fixing block, and the loading tray has a mounting slot for the fixing block to pass through. The fixing block is used to position the loading tray on the feeding mechanism. By first rotating the torsion bar at a certain angle, the loading tray is fitted onto the torsion bar. Then, by rotating the torsion bar back, the loading tray is mounted on the feeding mechanism, achieving quick assembly and disassembly of the loading tray and improving the efficiency of changing the loading tray.

Description

Technical Field

[0001] This application relates to the technical field of sewing machines, and in particular to an automatic shuttle changing device for sewing machines. Background Technology

[0002] The automatic shuttle changing device is an important innovation in weaving technology (especially in the development of traditional shuttle looms to modern ones). It solves a key bottleneck that restricts production efficiency—the problem of having to stop the machine to change the shuttle when the weft yarn on the sewing machine runs out.

[0003] In traditional automatic shuttle changing devices, a shuttle changing mechanism typically includes a shuttle changing mechanism and a feed tray. The feed tray is usually detachably mounted on the sewing machine by bolts and is used to hold shuttle cases containing sewing thread. During shuttle changing, the shuttle changing mechanism picks up a shuttle case containing sewing thread from the feed tray and places it into the shuttle case placement slot on the sewing machine. The shuttle case placement slot is equipped with a pushing device that transports the shuttle case containing sewing thread to the working part of the sewing machine. When all the sewing thread on the shuttle case is used up, the pushing device transfers the shuttle case from inside the sewing machine back to the shuttle case placement slot. Then, the shuttle changing mechanism removes the empty shuttle case and places it on the feed tray, and then picks up another shuttle case containing sewing thread from the feed tray and places it into the shuttle case placement slot.

[0004] When the feed tray is full of empty bobbin cases that have been replaced, the feed tray needs to be removed from the sewing machine and a new feed tray filled with bobbin cases containing sewing thread needs to be installed. However, each time the feed tray is replaced, the bolts need to be removed and installed, which is inefficient. Summary of the Invention

[0005] To improve the efficiency of changing the feed tray, this application provides an automatic shuttle changing device for sewing machines.

[0006] The automatic shuttle changing device for a sewing machine provided in this application adopts the following technical solution:

[0007] An automatic shuttle changing device for a sewing machine includes a shuttle changing mechanism, a feeding mechanism, and a loading mechanism. The shuttle changing mechanism and the feeding mechanism are mounted on the sewing machine. The loading mechanism includes an mounting component and a loading tray. The loading tray is detachably connected to the feeding mechanism via the mounting component and is used to store shuttle cases. The shuttle changing mechanism is used to replace shuttle cases on the sewing machine, and the feeding mechanism is used to transport the loading tray to the shuttle changing mechanism. The mounting component includes a torsion bar, which is mounted on the feeding mechanism. The torsion bar has a fixing block. The loading tray has a mounting slot for the fixing block to pass through, and the fixing block is used to position the loading tray on the feeding mechanism.

[0008] By adopting the above technical solution, the automatic shuttle changing device, which is composed of a shuttle changing mechanism, a feeding mechanism, and a loading mechanism, realizes automatic shuttle changing, thereby freeing up labor. First, by rotating the torsion bar at a certain angle, the loading tray is sleeved on the torsion bar. Then, by rotating the torsion bar back, the loading tray is installed on the feeding mechanism, realizing quick assembly and disassembly of the loading tray and improving the efficiency of changing the loading tray.

[0009] Preferably, the mounting assembly further includes a push rod, a push plate, and a connecting plate. The push rod, push plate, and connecting plate are all connected to the feeding mechanism. The push plate is slidably connected to the connecting frame. The push rod is used to push the push plate. The torsion rod is connected to the connecting plate. The push plate is used to push the torsion rod. The torsion rod is used to position the loading tray on the connecting plate. The push plate is provided with a push block, and the push block is provided with a ramp. The torsion rod is provided with a push rod. The push plate pushes the push rod to rotate through the push block. The mounting assembly further includes a torsion spring and a connecting spring. The torsion spring is located between the connecting plate and the torsion rod. The torsion spring connects the torsion rod to the connecting plate. The torsion spring is used to reset the rotated torsion rod. The connecting spring is located between the connecting plate and the torsion rod. The connecting spring is used to reset the torsion rod that has moved along the axis of the connecting plate.

[0010] By adopting the above technical solution, the feeding mechanism drives the push plate to move towards the push rod, pushing the push plate, which in turn pushes the torsion rod to rotate on the connecting plate, so that the fixed block on the torsion rod corresponds to the mounting slot opened on the loading plate, thereby facilitating the loading plate to be fitted onto the torsion rod; the torsion spring on the torsion rod is to facilitate the torsion rod to be torsionally reset, and the connecting spring on the torsion rod is to facilitate the torsion rod to slide and reset on the connecting plate.

[0011] Preferably, the torsion bar has a mounting block at one end near the feeding mechanism. The mounting block is used to abut against the slope. The connecting spring is mounted on the torsion bar and connects the mounting block to the connecting plate. The outline of the fixing block is consistent with the outline of the mounting through groove.

[0012] By adopting the above technical solution, when the push plate moves, it pushes the torsion rod to rotate while also moving the torsion rod towards the connecting plate via the ramp, so that the loading plate is fitted onto the torsion rod. After the push plate is reset, the torsion rod is reset by the connecting spring and the torsion spring, thereby positioning the loading plate on the connecting plate.

[0013] Preferably, the feeding mechanism includes a rodless cylinder, a connecting frame, and a deflection motor. The rodless cylinder is mounted on the sewing machine, and a slider is slidably connected to the rodless cylinder. The slider is connected to the connecting frame, and the deflection motor is mounted on the connecting frame. The push rod is connected to the rodless cylinder, the push plate is slidably connected to the connecting frame, and the connecting plate is connected to the output shaft of the deflection motor.

[0014] By adopting the above technical solution, the rodless cylinder drives the push plate to move towards the push rod through the slider, thereby pushing the push plate to move on the connecting frame; each time the bobbin is replaced, the deflection motor rotates a certain angle, thereby rotating the bobbin containing the sewing thread to a position that is easy for the bobbin changing mechanism to grasp.

[0015] Preferably, the mounting assembly further includes a push spring, a support block is connected to the rodless cylinder, the support block has a support groove for the push rod to slide, the push spring is connected in the support groove, and the push spring connects the push rod to the groove wall of the support groove.

[0016] By adopting the above technical solution, the push rod is pushed in the direction of compressing the push spring until the push rod disengages from the push plate, at which point the push plate resets. This method of resetting the push plate is faster.

[0017] Preferably, the shuttle changing mechanism includes a telescopic cylinder, a rotary cylinder, a connecting plate, and a gripping assembly. The telescopic cylinder is connected to the sewing machine, the rotary cylinder is mounted on the piston rod of the telescopic cylinder, the connecting plate is connected to the piston rod of the gripping cylinder, and the gripping assembly is connected to the connecting plate. The gripping assembly is used to grip the shuttle case on the loading tray.

[0018] By adopting the above technical solution, the rotary cylinder is connected to the gripping component through a connecting plate, and the telescopic cylinder is connected to the rotary cylinder through a telescopic piston rod. The telescopic cylinder drives the rotary cylinder and the gripping component connected to the rotary cylinder to extend and retract through the telescopic piston rod.

[0019] Preferably, the gripping assembly includes a fixed frame, a gripping cylinder, a connecting rod, a gripping block, and an abutment block. The fixed frame is connected to a connecting plate, the gripping cylinder is connected to the fixed frame, the connecting rod is mounted on the piston rod of the gripping cylinder, and the gripping block is also rotatably connected to the fixed frame and connected to the piston rod of the gripping cylinder. The fixed frame is also provided with an abutment block, which is used to abut the shuttle housing. The gripping cylinder grips the shuttle housing through the gripping block and the abutment block.

[0020] By adopting the above technical solution, when the piston rod of the gripping cylinder extends, the locking head on the gripping block moves closer to the contact block. As the piston rod continues to extend, the gripping block flips the flip plate open, allowing the locking head to be inserted into the gripping slot. When the gripping block flips the flip plate to fit against the side of the contact block, the gripping assembly completes the gripping of the shuttle case, and at this time, the cooperating card block is inserted into the gripping slot.

[0021] Preferably, the shuttle changing mechanism further includes a gripping detection component, which includes a support rod and a gripping detection sensor; the support rod is connected to a rotary cylinder, and the gripping detection sensor is connected to the support rod; the gripping detection sensor is used to detect whether the gripping block grips the shuttle housing.

[0022] By adopting the above technical solution, in order to reduce the occurrence of the gripping component missing its target, a gripping detection sensor is installed on the rotary cylinder.

[0023] Preferably, the shuttle changing mechanism further includes a loading detection sensor connected to the sewing machine; the loading detection sensor is used to detect whether the assembly has installed the replacement shuttle case on the sewing machine.

[0024] By adopting the above technical solution, in order to ensure that the replaced bobbin case is present on the sewing machine during the bobbin case replacement process, a material loading detection sensor is installed on the sewing machine.

[0025] Preferably, a positioning block is connected to the loading tray, and a positioning groove is provided on the positioning block for positioning the shuttle shell.

[0026] The purpose of installing positioning blocks on the loading tray and opening positioning slots on the positioning blocks by adopting the above technical solution is to facilitate placing the shuttle shell on the loading tray.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The rodless cylinder drives the push plate to move towards the abutment rod through the connecting frame. After the push plate abuts against the abutment rod, it slides on the connecting frame and pushes the torsion rod to rotate. When the fixing block on the torsion rod rotates to correspond with the mounting slot on the loading tray, the loading tray can be removed from the torsion rod, achieving quick removal of the loading tray. After the shuttle shell is installed on the loading tray and re-sleeved onto the torsion rod, the abutment rod is pushed to one side to disengage the abutment rod from the push plate. At the same time, under the action of the push spring, the push plate returns to its original position, and the torsion rod returns to its original position through the torsion spring. The torsion rod fixes the loading tray to the connecting plate through the fixing block, achieving quick installation of the loading tray.

[0029] 2. By setting the gripping detection sensor, the occurrence of gripping components missing their target can be reduced.

[0030] 3. By setting up a loading detection sensor, it is possible to ensure that the replacement bobbin is present on the sewing machine during the bobbin replacement process. Attached Figure Description

[0031] Figure 1 This is a schematic diagram illustrating the overall structure in the embodiments of this application.

[0032] Figure 2 This is a schematic diagram illustrating the installation positions of the shuttle changing mechanism and the feeding mechanism in the embodiments of this application.

[0033] Figure 3 This is a schematic diagram illustrating the structure of the feeding mechanism in the embodiments of this application.

[0034] Figure 4 This is a structural schematic diagram illustrating the shuttle mechanism in the embodiments of this application.

[0035] Figure 5 This is a structural diagram illustrating the grabbing component in the embodiments of this application.

[0036] Figure 6 This is an exploded view of the grasping component in the embodiments of this application.

[0037] Figure 7 This is a magnified view of a portion of the grabbing block used in the embodiments of this application.

[0038] Figure 8 This is a schematic diagram illustrating the structure of the shuttle shell in the embodiments of this application.

[0039] Figure 9 This is a cross-sectional schematic diagram used to illustrate the shuttle shell in the embodiments of this application.

[0040] Figure 10 This is a schematic diagram illustrating the structure of the loading tray in the embodiments of this application.

[0041] Figure 11 This is an exploded view of the installation components in the embodiments of this application.

[0042] Figure 12 This is a schematic diagram illustrating the connection relationship between the push plate and the connecting frame in the embodiments of this application.

[0043] Figure 13 This is a top view used to illustrate the installation components in the embodiments of this application.

[0044] Figure 14 This is a structural schematic diagram illustrating the torsion bar in the embodiments of this application.

[0045] Figure 15 This is a schematic diagram illustrating the connection relationship between the support block and the abutment rod in the embodiments of this application.

[0046] Figure 16 This is a schematic diagram illustrating the connection relationship between the fixed block and the loading tray in the embodiments of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Sewing machine; 11. Machine head; 12. Machine housing; 121. Extension block; 122. Mounting hole; 123. Material placement plate; 13. Bracket; 14. Support plate; 2. Shuttle changing mechanism; 21. Telescopic cylinder; 22. Rotary cylinder; 23. Connecting plate; 24. Gripping assembly; 241. Connecting block; 242. Fixing frame; 243. Gripping cylinder; 244. Connecting rod; 245. Gripping block; 246. Locking head; 247. Abutment block; 248. Matching block; 25. Gripping detection assembly; 251. Support rod; 252. Gripping detection sensor; 26. Material loading detection sensor; 3. Feeding mechanism; 31. Rodless cylinder; 311. Support block; 312. Support groove; 32. Slider; 33. Connecting frame; 331. Extension block; 34. Deflection motor 35. Install detection sensor; 4. Loading mechanism; 41. Loading tray; 411. Detection hole; 412. Installation through slot; 413. Installation rod; 414. Annular groove; 415. Positioning block; 416. Positioning groove; 417. Thickness block; 42. Installation assembly; 421. Push rod; 422. Push spring; 423. Push plate; 424. Push block; 425. Connecting plate; 426. Torsion rod; 427. Push rod; 428. Connecting groove; 429. Fixing block; 430. Connecting spring; 431. Torsion spring; 432. Push spring; 433. Dovetail block; 434. Ramp; 435. Installation block; 5. Shuttle case; 51. Installation cylinder; 52. Push plate; 521. Push hole; 53. Flip plate; 531. Gripping slot; 54. Positioning rod. Detailed Implementation

[0049] The following is in conjunction with the appendix Figure 1-16 This application will be described in further detail.

[0050] This application discloses an automatic shuttle changing device for a sewing machine 1, referring to... Figures 1-3 The system includes a sewing machine 1, a shuttle changing mechanism 2, a feeding mechanism 3, and a loading mechanism 4. The sewing machine 1 includes a sewing head 11 and a machine housing 12. A material placement plate 123 is fixedly connected to the upper end of the machine housing 12. The sewing head 11 is fixedly connected to the upper end of the machine housing 12, and a bracket 13 is fixedly connected to the lower end of the machine housing 12. A protruding block 121 is provided on one side of the machine housing 12, and a mounting hole 122 is provided on the protruding block 121 for mounting a bobbin case 5. A sewing thread spool is provided inside the bobbin case 5. The feeding mechanism 3 is installed in the machine housing. Below 12, the shuttle changing mechanism 2 is installed below the machine housing 12 and located on one side of the feeding mechanism 3, and the loading mechanism 4 is installed on the feeding mechanism 3; the feeding mechanism 3 is used to pass the shuttle housing 5 filled with sewing thread to the shuttle changing mechanism 2, and the shuttle changing mechanism 2 is used to take out the empty shuttle housing 5 in the mounting hole 122, and grab a shuttle housing 5 filled with sewing thread from the feeding mechanism 3 and put it into the mounting hole 122, so that the pushing mechanism installed in the machine housing 12 can push the shuttle housing 5 filled with sewing thread to the machine head 11.

[0051] Reference Figures 1-3 The loading mechanism 4 includes a loading tray 41 and an installation component 42. The installation component 42 is installed on the feeding mechanism 3. The loading tray 41 is detachably installed on the feeding mechanism 3 via the installation component 42. The loading tray 41 is used to hold the shuttle shell 5.

[0052] Reference Figure 2 , Figure 4 The shuttle changing mechanism 2 includes a telescopic cylinder 21, a rotary cylinder 22, a connecting plate 23, a gripping assembly 24, and a gripping detection assembly 25. A support plate 14 is fixedly connected to the bottom wall of the housing 12. The telescopic cylinder 21 is fixedly connected to the support plate 14. One end of the rotary cylinder 22 is fixedly connected to the piston rod of the telescopic cylinder 21. When the shuttle changing mechanism 2 is not in operation, the piston rod of the telescopic cylinder 21 is in the extended state. The connecting plate 23 is fixedly connected to the end of the rotary cylinder 22 away from the telescopic cylinder 21. Two sets of gripping assemblies 24 are provided, and the two sets of gripping assemblies 24 are respectively installed at both ends of the long shaft of the connecting plate 23.

[0053] Reference Figures 2-4 When it is necessary to replace the bobbin case 5 in the mounting hole 122, the telescopic cylinder 21 first retracts the rotary cylinder 22 towards the support plate 14 via the piston rod. Meanwhile, the gripping component 24 near the loading tray 41 grips a bobbin case 5 containing sewing thread from the loading tray 41. Simultaneously, the gripping component 24 near the mounting hole 122 grips the empty bobbin case 5 in the mounting hole 122. Then, the telescopic cylinder 21 extends the rotary cylinder 22 away from the support plate 14 via the piston rod, thereby removing the empty bobbin case 5 from the mounting hole 122 and separating the bobbin case 5 containing sewing thread from the loading tray 41 on the gripping component 24 at the other end of the connecting plate 23. After the two gripping components 24 are rotated 180° by the rotary cylinder 22, the piston rod is retracted by the telescopic cylinder 21, thereby driving the rotary cylinder 22 to move towards the support plate 14. This allows the gripping component 24 near the mounting hole 122 to place the bobbin 5 containing sewing thread into the mounting hole 122, so that the pushing mechanism can push the bobbin 5 containing sewing thread to the machine head 11. At the same time, the gripping component 24 near the loading tray 41 places the empty bobbin 5 that has run out of sewing thread onto the loading tray 41. Finally, the piston rod of the telescopic cylinder 21 extends again and pushes the rotary cylinder 22 away from the support plate 14, thereby completing a replacement operation.

[0054] Reference Figure 2The gripping detection component 25 includes a support rod 251 and a gripping detection sensor 252. The support rod 251 is fixedly connected to one side of the rotary cylinder 22. Each end of the support rod 251 is provided with a gripping detection sensor 252. Each gripping detection sensor corresponds to a gripping component 24. After the gripping component 24 completes the gripping action on the shuttle 5, the gripping detection sensor 252 detects whether there is a shuttle 5 on the gripping block 245. If there is a shuttle 5, the automatic shuttle changing device of the sewing machine 1 operates normally. If there is no shuttle 5, the gripping detection sensor 252 sends an alarm message to the main control unit (not shown in the figure), and the automatic shuttle changing device of the sewing machine 1 stops working until the operator troubleshoots the problem and then restarts the automatic shuttle changing device of the sewing machine 1. The detection principle of the gripping detection sensor 252, the main control unit, and the gripping detection sensor 252 are all existing technologies in the field and will not be elaborated here.

[0055] Reference Figures 4-6 This embodiment takes one of the gripping components 24 as an example for description. The gripping component 24 includes a connecting block 241, a fixing frame 242, a gripping cylinder 243, a connecting rod 244, a gripping block 245, a locking head 246, and an abutment block 247. The connecting block 241 is fixedly connected to the end of the long axis of the connecting plate 23. One end of the fixing frame 242 is fixedly connected to the connecting block 241. The long axis of the fixing frame 242 is perpendicular to the long axis of the connecting plate 23, and the long axis of the fixing frame 242 is also parallel to the axis of the piston rod of the telescopic cylinder 21. The gripping cylinder 243 is fixedly connected to the fixed frame 242. The axis of the gripping cylinder 243 is parallel to the long axis of the fixed frame 242. One end of the connecting rod 244 is hinged to the end of the piston rod of the gripping cylinder 243. The gripping block 245 is arc-shaped. One end of the gripping block 245 is hinged to the fixed frame 242 near the piston rod of the gripping cylinder 243, and the other end extends away from the piston rod of the gripping cylinder 243. A hinge lug is provided at the end of the gripping block 245 near the piston rod of the gripping cylinder 243. The hinge lug is hinged to the other end of the connecting rod 244.

[0056] Reference Figure 6 and 7A locking head 246 is fixedly installed at the end of the gripping block 245 away from the piston rod of the gripping cylinder 243. The thickness of the locking head 246 is less than the thickness of the gripping rod. The abutment block 247 is fixedly connected to the side of the fixing frame 242 away from the gripping cylinder 243, and the abutment block 247 is located at the end of the fixing frame 242 near the gripping block 245. A mating block 248 is fixedly connected to the side of the abutment block 247 facing the gripping block 245. When the piston rod of the telescopic cylinder 21 retracts, the end of the abutment block 247 on the fixing frame 242 near the loading tray 41 abuts against the shuttle shell 5. Then the piston rod of the gripping cylinder 243 extends, and the piston rod of the gripping cylinder 243 pushes the gripping block 245 to rotate through the connecting rod 244, so that the locking head 246 on the gripping block 245 moves towards the abutment block 247, thereby facilitating the gripping of the shuttle shell 5. When the piston rod of the gripping cylinder 243 retracts, the piston rod of the gripping cylinder 243 pulls the gripping block 245 to rotate through the connecting rod 244, causing the locking head 246 on the gripping block 245 to move away from the contact block 247, so as to release the shuttle case 5.

[0057] Reference Figures 8-9 The shuttle shell 5 is prior art in this field. The shuttle shell 5 includes a flip plate 53, a push plate 52, and a positioning rod 54. The flip plate 53 has a gripping slot 531. The thickness of the locking head 246 on the gripping block 245 is the same as the width of the gripping slot 531. One end of the flip plate 53 is hinged to the shuttle shell 5. The push plate 52 is slidably connected to the shuttle shell 5 and is located between the flip plate 53 and the shuttle shell 5. The end of the flip plate 53 near the push plate 52 has a protrusion (not shown) for pushing the push plate 52 to move. The push plate 52 has a push hole 521. A return torsion spring (not shown) is provided at the connection between the flip plate 53 and the shuttle shell 5. A return spring (not shown) is provided between the push plate 52 and the shuttle shell 5. When no external force is applied, the flip plate 53 is attached to the push plate 52 on the shuttle shell 5. An installation cylinder 51 is also fixedly connected inside the shuttle shell 5. The installation cylinder 51 has openings at both ends. When the flip plate 53 is flipped open from the shuttle housing 5, the flip plate 53 pushes the push plate 52 to slide on the shuttle housing 5 through the protrusion block, so that the push hole 521 is aligned with the opening of the mounting cylinder 51 near the end of the push plate 52. When the flip plate 53 is released, the flip plate 53 adheres to the push plate 52 under the action of the return torsion spring, and the push plate 52 is reset under the action of the return spring, so that the axis of the push hole 521 is misaligned with the axis of the mounting cylinder 51.

[0058] Reference Figures 9-10The loading tray 41 is equipped with an installation rod 413, and an annular groove 414 is opened at one end of the installation rod 413 near the push plate 52. The process of installing the shuttle shell 5 on the loading tray 41 is as follows: the operator first flips the flip plate 53 off the shuttle shell 5, and then the shuttle shell 5 is sleeved on the installation rod 413 through the installation cylinder 51. At this time, the push hole 521 coincides with the opening of the installation cylinder 51, and the push hole 521 on the push plate 52 is located at the annular groove 414. When the operator releases the flip plate 53, the flip plate 53 is reset by the return torsion spring, and the push plate 52 is reset by the return spring, so that the axis of the push hole 521 is misaligned with the axis of the installation cylinder 51, so that the push plate 52 is engaged in the annular groove 414 on the installation rod 413 through the push hole 521, thereby installing the shuttle shell 5 on the installation rod 413. The mounting plate is also provided with a positioning block 415, which is fixedly connected to the loading plate 41. The positioning block 415 has a positioning groove 416 for placing the positioning rod 54 of the shuttle shell 5. There are 6 positioning grooves 416, which are arranged in a circumferential direction along the axis of the positioning block 415. The positioning block 415 positions the shuttle shell 5 through the positioning grooves 416.

[0059] Reference Figures 5-6 When the piston rod of the gripping cylinder 243 extends, the locking head 246 on the gripping block 245 moves closer to the contact block 247. As the piston rod continues to extend, the gripping block 245 flips the flip plate 53 open, so that the locking head 246 is inserted into the gripping slot 531. When the gripping block 245 flips the flip plate 53 and attaches it to the side of the contact block 247, the gripping assembly 24 completes the gripping of the shuttle shell 5, and at this time the cooperating block 248 is inserted into the gripping slot 531.

[0060] Reference Figure 1 , Figure 3 The shuttle changing mechanism 2 also includes a loading detection sensor 26, which is fixedly connected to the lower end of the material placement plate 123. The loading detection sensor 26 is used to detect whether the gripping component 24 has installed the shuttle case 5 in the mounting hole 122. If the shuttle case 5 is installed in the mounting hole 122, the automatic shuttle changing device of the sewing machine 1 will operate normally. If the shuttle case 5 is not installed in the mounting hole 122, the installation detection sensor 35 will send an alarm message to the main control unit, and the automatic shuttle changing device of the sewing machine 1 will stop working until the operator troubleshoots the problem, and then the automatic shuttle changing device of the sewing machine 1 can be restarted.

[0061] Reference Figure 2 , Figure 3 , Figure 11The feeding mechanism 3 includes a rodless cylinder 31, a connecting frame 33, and deflection motors 34. The rodless cylinder 31 is fixedly connected to the support plate 14 and is located below the telescopic cylinder 21. A slider 32 is provided on the rodless cylinder 31, and the direction in which the slider 32 slides on the rodless cylinder 31 is perpendicular to the direction of movement of the piston rod of the telescopic cylinder 21. The upper end of the connecting frame 33 is fixedly connected to the lower end of the slider 32. Two deflection motors 34 are provided, and the two deflection motors 34 are respectively fixedly connected to both ends of the connecting frame 33 along its length. Each deflection motor 34 has a loading tray 41 mounted on its output shaft via a mounting assembly 42. Each loading tray 41 has 6 shuttle shells 5 mounted on it. After each use of a shuttle shell 5 in the mounting hole 122 is replaced, the deflection motor 34 located directly below the gripping assembly 24 drives the loading tray 41 to rotate 60°. When all 6 shuttle shells 5 on the loading tray 41 below the rotating motor have been replaced, the slider 32 drives the connecting frame 33 to move another loading tray 41 directly below the rotating cylinder 22 so that the gripping assembly 24 can grip the shuttle shells 5.

[0062] Reference Figure 3 , Figure 10 The loading tray 41 has 6 detection holes 411. Each detection hole 411 is located on one side of a mounting rod 413. The shuttle shell 5 mounted on the mounting rod 413 covers the detection hole 411. The connecting frame 33 is fixedly installed with a detection sensor 35. The detection sensor 35 detects whether the shuttle shell 5 is installed on the loading tray 41 through the detection hole 411.

[0063] Reference Figures 11-12 The mounting assembly 42 includes a push plate 423, a connecting plate 425, and a torsion bar 426. Two sets of mounting assemblies 42 are provided, and the two sets of mounting assemblies 42 are symmetrically mounted on the connecting frame 33. Each deflection motor 34 is connected to a loading plate 41 through a set of mounting assemblies 42. Taking the left-side mounting component 42 as an example, the left side of the connecting frame 33 is provided with an extension block 331. The extension block 331 has a dovetail groove for sliding connection of the push plate 423. The push plate 423 has a dovetail block 433 on its side near the connecting frame 33. The push plate 423 is slidably connected to the connecting frame 33 via its own dovetail block 433. The surface of the push plate 423 is smooth. A push spring 422 is provided between the side wall of the dovetail block 433 and the side wall of the dovetail groove, connecting the dovetail block 433 to the dovetail groove. Two push blocks 424 are also fixedly installed on the side wall of the push plate 423 away from the connecting frame 33. The two push blocks 424 are respectively located on both sides of the output shaft of the deflection motor 34. A ramp 434 is provided in the middle of the right side wall of each push block 424, with one end extending to the side wall of the push plate 423. A waist-shaped groove is provided through the middle of the push plate 423 for the output shaft of the deflection motor 34 to pass through.

[0064] Reference Figures 11-13 The connecting plate 425 is fixedly connected to the output shaft of the deflection motor 34. The push plate 423 is located between the deflection motor 34 and the connecting plate 425. The output shaft of the deflection motor 34 passes through the waist-shaped hole on the push plate 423 so that the push plate 423 can avoid the output shaft of the deflection motor 34 during the sliding process on the connecting frame 33.

[0065] Reference Figure 11 and Figure 14 Two torsion bars 426 are provided, and the two torsion bars 426 are respectively located at the push blocks 424 on both sides of the output shaft of the deflection motor 34. The torsion bars 426 are slidably mounted on the connecting plate 425 in a direction parallel to the axis of the output shaft of the deflection motor 34. One end of the torsion bar 426 extends through the connecting plate 425 towards the push plate 423. The end of the torsion bar 426 near the connecting frame 33 is fixedly connected to the mounting block 435. The diameter of the mounting block 435 is larger than the diameter of the torsion bar 426. The mounting block 435 is used to slide along the slope 434. A push rod 427 is fixedly connected to the circumferential side wall of the mounting block 435. The push rod 427 is inclined towards the push block 424, and the long axis of the push rod 427 is perpendicular to the long axis of the torsion bar 426. The end of the torsion bar 426 away from the connecting bracket 33 is detachably connected to a fixing block 429 by screws. A connecting groove 428 is also provided on the side wall of the torsion bar 426 between the connecting plate 425 and the fixing block 429. The connecting groove 428 is opened along the long axis of the torsion bar 426. A torsion spring 431 is fitted onto each torsion bar 426, and the torsion spring 431 is located between the connecting plate 425 and the fixing block 429. The end of the torsion spring 431 near the connecting plate 425 is fixedly connected to the side wall of the connecting plate 425, and the end of the torsion spring 431 away from the connecting plate 425 has a hook that extends into the connecting groove 428, allowing the torsion bar 426 to be torsionally reset. A connecting spring 430 is also provided between the mounting block 435 on the torsion bar 426 and the connecting plate 425, with both ends of the connecting spring 430 abutting against the connecting plate 425 and the mounting block 435 respectively.

[0066] Reference Figure 11 , Figure 13 The loading tray 41 has two mounting slots 412, and the two mounting slots 412 on the loading tray 41 correspond one-to-one with the two torsion bars 426. The fixing blocks 429 on the two torsion bars 426 pass through the mounting slots 412 on the loading tray 41, and the outline of the mounting slots 412 is the same as the outline of the fixing blocks 429.

[0067] Reference Figure 12 and Figure 13The deflection motor 34 drives the connecting plate 425 to rotate via its output shaft, and the connecting plate 425 then drives the loading plate 41 to rotate via the torsion rod 426. The end face of the loading plate 41 near the connecting frame 33 abuts against the connecting plate 425, and a thick block 417 is provided on the end face of the loading plate 41 that abuts against the connecting plate 425. The thickness of the thick block 417 is greater than the axial length of the torsion spring 431, thereby reducing the contact force exerted on the torsion spring 431 when the connecting plate 425 abuts against the loading plate 41.

[0068] Reference Figure 15 The rodless cylinder 31 has a support block 311 at both ends, and the two support blocks 311 are symmetrically arranged. In this embodiment, the support block 311 located on the left side of the rodless cylinder 31 is used as an example. A support groove 312 is opened in the bottom wall of the support block 311. The mounting assembly 42 also includes a push rod 421 and a push spring 432. The push rod 421 is an "L" shaped rod, and the upper end of its vertical section is slidably connected in the support groove 312. The push spring 432 is located between the side wall of the support groove 312 and the push rod 421, and the push spring 432 connects the push rod 421 to the side wall of the support groove 312.

[0069] Reference Figure 3 , Figure 11 , Figure 15 The installation process of the loading tray 41 is as follows: When the rodless cylinder 31 drives the slider 32 to move to the left, the slider 32 drives the push plate 423 to move to the left through the connecting frame 33. When the left end of the push block 424 on the push plate 423 abuts against the right end of the horizontal section of the push rod 421, the push plate 423 slides on the connecting frame 33 towards the center of the connecting frame 33. The right side of the push block 424 first pushes the push rod 427 to rotate clockwise. Then, the push block 424 pushes the torsion rod 426 away from the connecting frame 33 through the ramp 434, so that the fixed block 429 rotates from the vertical state to the horizontal state, so that the fixed block 429 is aligned with the mounting slot 412. Then, the loading tray 41 is fitted onto the torsion rod 426 through the mounting slot 412, and then... Figure 16 ,exist Figure 16 The torsion bar 426 on the left side is in the state after the push block 424 has moved to the right.

[0070] Reference Figure 3 , Figure 11 and Figure 12When it is necessary to fix the loading tray 41 to the connecting tray 425, the push rod 421 is pushed in the direction of compressing the push spring 432, so that the end of the horizontal section of the push rod 421 slides along the end of the push plate 423 until the push rod 421 is misaligned with the push plate 423. The push plate 423 is reset under the action of the push spring 422. Then, the torsion rod 426 is rotated back to its original position under the action of the torsion spring 431, and the fixed block 429 after reset is misaligned with the mounting slot 412 on the loading tray 41. At the same time, the torsion rod 426 is also moved towards the connecting frame 33 by the action of the connecting spring 430 until the fixed block 429 abuts against the loading tray 41, thereby fixing the loading tray 41 to the connecting tray 425. Then the push rod 421 is released. At this time, the push rod 421 abuts against the side wall of the push plate 423 under the action of the push spring 432. Figure 16 In the middle, the right torsion rod 426 is in the state of positioning the loading tray 41 on the connecting plate 425 after reset. When it is necessary to replace the loading tray on the right, the connecting frame 33 is driven to move to the right by the rodless cylinder 31, and the above steps are repeated so that the mounting through slot 412 on the loading tray 41 at the right end of the connecting frame 33 is aligned with the fixing block 429, thereby facilitating the disassembly of the loading tray 41.

[0071] The implementation principle of the automatic shuttle changing device for a sewing machine 1 according to an embodiment of this application is as follows: The operator installs six shuttle cases 5 on the loading tray 41, and then installs the loading tray 41 onto the connecting tray 425 via the mounting assembly 42. The sewing machine 1 and its automatic shuttle changing device are then started. As the sewing machine 1 operates continuously, the sewing thread connection in the shuttle case 5 within the mounting hole 122 is pulled out by the sewing machine 1. Once all the sewing thread has been pulled out, the sewing machine 1 sends a shuttle changing signal to the main control unit via an internal sensor. Upon receiving the signal, the main control unit initiates the shuttle changing process. Mechanism 2 replaces the shuttle shell 5 in the mounting hole 122. Each time the shuttle shell 5 is replaced, the deflection motor 34 deflects 60°. After the output shaft of the deflection motor 34 rotates one revolution, it sends a plate change signal to the main control unit. After receiving the signal, the main control unit uses the rodless cylinder 31 to slide the deflection motor 34 and the loading plate 41 directly below the rotary cylinder 22 via the slider 32. At this time, the operator removes the previous loading plate 41 from the mounting assembly 42, and then uses the mounting assembly 42 to install the loading plate 41 filled with shuttle shell 5 onto the connecting plate 425.

[0072] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic thread changing device for a sewing machine, characterized by: The sewing machine (1) includes a shuttle changing mechanism (2), a feeding mechanism (3), and a loading mechanism (4). The shuttle changing mechanism (2) and the feeding mechanism (3) are mounted on the sewing machine (1). The loading mechanism (4) includes a mounting assembly (42) and a loading tray (41). The loading tray (41) is detachably connected to the feeding mechanism (3) via the mounting assembly (42). The loading tray (41) is used to store the shuttle case (5). The shuttle changing mechanism (2) is used to replace the shuttle case (5) on the sewing machine (1). The feeding mechanism (3) is used to transport the loading tray (41) to the shuttle changing mechanism (2). The mounting assembly (42) includes... A torsion bar (426) is mounted on the feeding mechanism (3). A fixing block (429) is provided on the torsion bar (426). An installation slot (412) is provided on the loading tray (41) for the fixing block (429) to pass through. The fixing block (429) is used to position the loading tray (41) on the feeding mechanism (3). The mounting assembly also includes a push rod (421), a push plate (423), a connecting plate (425), and a torsion spring (431). The push rod (421), the push plate (423), and the connecting plate (425) are all connected to the feeding mechanism (3). A rod (421) is used to push against a pusher plate (423). A torsion rod (426) is connected to a connecting plate (425). The pusher plate (423) is used to push the torsion rod (426). The torsion rod (426) is used to position the loading tray (41) on the connecting plate (425). A pusher block (424) is provided on the pusher plate (423). A ramp (434) is provided on the pusher block (424) for contacting the torsion rod (426). A push rod (427) is provided on the torsion rod (426). The pusher plate (423) pushes the push rod (427) to rotate through the pusher block (424). The torsion spring (431) is mounted on the torsion bar (426), and the torsion spring (431) connects the torsion bar (426) to the connecting plate (425). The mounting assembly is also connected to a spring (430). The end of the torsion bar (426) near the feeding mechanism (3) is provided with a mounting block (435). The mounting block (435) is used to abut against the ramp (434). The connecting spring (430) is mounted on the torsion bar (426), and the connecting spring (430) connects the mounting block (435) to the connecting plate (425). The outline of the fixing block (429) is consistent with the outline of the mounting through groove (412).

2. An automatic thread changer for a sewing machine according to claim 1, characterized in that: The feeding mechanism (3) includes a rodless cylinder (31), a connecting frame (33), and a deflection motor (34). The rodless cylinder (31) is mounted on the sewing machine (1). A slider (32) is provided on the rodless cylinder (31). The slider (32) is connected to the connecting frame (33). The deflection motor (34) is mounted on the connecting frame (33). The push rod (421) is connected to the rodless cylinder (31). The push plate (423) is slidably connected to the connecting frame (33). The connecting plate (425) is connected to the output shaft of the deflection motor (34).

3. An automatic thread changer for a sewing machine according to claim 2, characterized in that: The mounting assembly (42) also includes a push spring (432). A support block (311) is connected to the rodless cylinder (31). The support block (311) has a support groove (312) for sliding the push rod (421). The push spring (432) is connected in the support groove (312) and connects the push rod (421) to the groove wall of the support groove (312).

4. A sewing machine automatic thread changer as claimed in claim 1, wherein: The shuttle changing mechanism (2) includes a telescopic cylinder (21), a rotary cylinder (22), a connecting plate (23), and a gripping assembly (24). The telescopic cylinder (21) is connected to the sewing machine (1). The rotary cylinder (22) is mounted on the piston rod of the telescopic cylinder (21). The connecting plate (23) is connected to the piston rod of the gripping cylinder (243). The gripping assembly (24) is connected to the connecting plate (23). The gripping assembly (24) is used to grip the shuttle case (5) on the loading tray (41).

5. A sewing machine automatic thread changing device according to claim 4, characterized in that: The gripping assembly (24) includes a fixed frame (242), a gripping cylinder (243), a connecting rod (244), a gripping block (245), and an abutment block (247). The fixed frame (242) is connected to the connecting plate (23). The gripping cylinder (243) is connected to the fixed frame (242). The connecting rod (244) is mounted on the piston rod of the gripping cylinder (243). The gripping block (245) is also rotatably connected to the fixed frame (242) and is also connected to the piston rod of the gripping cylinder (243). The fixed frame (242) is also provided with an abutment block (247), which is used to abut the shuttle shell (5). The gripping cylinder (243) grips the shuttle shell (5) through the gripping block (245) and the abutment block (247).

6. A sewing machine automatic thread changing device according to claim 5, characterized in that: The shuttle changing mechanism (2) further includes a gripping detection component (25), which includes a support rod (251) and a gripping detection sensor (252). The support rod (251) is connected to a rotary cylinder (22), and the gripping detection sensor (252) is connected to the support rod (251). The gripping detection sensor (252) is used to detect whether the gripping block (245) grips the shuttle shell (5).

7. A sewing machine automatic thread changing device according to claim 5, characterized in that: The shuttle changing mechanism (2) also includes a loading detection sensor (26), which is connected to the sewing machine (1) and is used to detect whether the assembly has installed the replacement shuttle (5) on the sewing machine (1).

8. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that: The loading tray (41) is connected to a positioning block (415), and the positioning block (415) is provided with a positioning groove (416), which is used to limit the position of the shuttle shell (5).

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