Automatic shuttle changing device of sewing machine

Abstract

The invention relates to an automatic shuttle changing device of a sewing machine, and belongs to the technical field of sewing machines, the automatic shuttle changing device comprises a shuttle changing mechanism, a feeding mechanism and a loading mechanism, the shuttle changing mechanism and the feeding mechanism are installed on the sewing machine, the loading mechanism comprises an installation assembly and a loading disc, and the loading disc is detachably connected to the feeding mechanism through the installation assembly; the loading tray is used for storing bobbin cases; the shuttle changing mechanism is used for changing a shuttle case on the sewing machine, and the feeding mechanism is used for conveying the loading tray to the shuttle changing mechanism; the mounting assembly comprises a torsion rod, the torsion rod is mounted on the feeding mechanism, a fixing block is arranged on the torsion rod, a mounting through groove allowing the fixing block to penetrate through is formed in the loading tray, and the fixing block is used for positioning the loading tray on the feeding mechanism. The torsion rod is rotated by a certain angle, the loading tray is connected to the torsion rod in a sleeving mode, then the loading tray is installed on the feeding mechanism through rotation of the torsion rod, the loading tray is rapidly disassembled and assembled, and the efficiency of replacing the loading tray is improved.

Description

Technical Field

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

[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 stopping the sewing machine to change the shuttle when the weft yarn on the sewing machine runs out.

[0003] In the traditional method, the automatic shuttle changing device usually includes a shuttle changing mechanism and a loading tray. The loading tray is usually detachably mounted on the sewing machine by bolts, and the loading tray is used to place the bobbin case containing the sewing thread. When changing the shuttle, the shuttle changing mechanism grabs a bobbin case containing the sewing thread from the loading tray and puts it into the bobbin case placement slot on the sewing machine. A pushing device is provided in the bobbin case placement slot, which transports the bobbin case containing the sewing thread to the working part of the sewing machine. When all the sewing thread on the bobbin case is used up, the pushing device transfers the bobbin case from the inside of the sewing machine to the bobbin case placement slot, and then the shuttle changing mechanism takes out the empty bobbin case and places it on the loading tray, and then grabs a bobbin case containing the sewing thread from the loading tray again and puts it into the bobbin case placement slot.

[0004] When the loading tray is full of empty bobbin cases after replacement, the loading tray needs to be removed from the sewing machine and a new loading tray full of bobbin cases with sewing thread needs to be reinstalled. However, each time the loading tray is replaced, the bolts need to be disassembled and assembled, which reduces the working efficiency. Summary of the Invention

[0005] In order to improve the efficiency of replacing the loading tray, the present application provides an automatic shuttle changing device for a sewing machine.

[0006] The present application provides an automatic shuttle changing device for a sewing machine adopts the following technical solution: An automatic shuttle changing device for a sewing machine comprises a shuttle changing mechanism, a feeding mechanism and a loading mechanism, the shuttle changing mechanism and the feeding mechanism being installed on the sewing machine, the loading mechanism comprising a mounting assembly and a loading tray, the loading tray being detachably connected to the feeding mechanism via the mounting assembly, the loading tray being used to store bobbin cases; the shuttle changing mechanism being used to replace the bobbin cases on the sewing machine, the feeding mechanism being used to transport the loading tray to the shuttle changing mechanism; the mounting assembly comprising a torsion rod being installed on the feeding mechanism, a fixing block being provided on the torsion rod, a mounting through slot being provided on the loading tray for the fixing block to pass through, and the fixing block being used to position the loading tray on the feeding mechanism.

[0007] By adopting the above technical solution, the automatic shuttle changing device composed of the shuttle changing mechanism, the feeding mechanism and the loading mechanism can realize automatic shuttle changing, thereby liberating labor. First, the torsion rod is rotated to a certain angle, the loading tray is sleeved on the torsion rod, and then the torsion rod is rotated to install the loading tray on the feeding mechanism, so that the loading tray can be quickly disassembled and assembled, thereby improving the efficiency of replacing the loading tray.

[0008] Preferably, the mounting assembly further includes a push rod, a push plate and a connecting disk, the push rod, the push plate and the connecting disk 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 disk, the push plate is used to push the torsion rod, and the torsion rod is used to position the loading disk on the connecting disk; a pushing block is provided on the pushing block, a slope is provided on the torsion rod, and a pushed rod is provided on the torsion rod, and the pushing plate pushes the pushed rod to rotate through the pushing block; the mounting assembly further includes a torsion spring and a connecting spring, the torsion spring is located between the connecting disk and the torsion rod, the torsion spring connects the torsion rod to the connecting disk, the torsion spring is used to reset the torsion rod after rotation, and the connecting spring is located between the connecting disk and the torsion rod, and the connecting spring is used to reset the torsion rod moving along the axis of the connecting disk.

[0009] By adopting the above technical solution, the feeding mechanism drives the pushing plate to move toward the pushing rod, pushing the pushing plate, and the pushing plate pushes the torsion rod to rotate on the connecting disk, so that the fixed block on the torsion rod corresponds to the installation groove opened on the loading disk, thereby facilitating the loading disk to be mounted on the torsion rod; a torsion spring is provided on the torsion rod to facilitate the torsion rod to be twisted and reset, and a connecting spring is provided on the torsion rod to facilitate the torsion rod to slide and reset on the connecting disk.

[0010] Preferably, a mounting block is provided at one end of the torsion rod close to the feeding mechanism, and the mounting block is used to abut the slope. The connecting spring is installed on the torsion rod, and the connecting spring connects the mounting block to the connecting plate. The contour of the fixing block is consistent with the contour of the mounting slot.

[0011] By adopting the above technical solution, when the pushing plate moves, the pushing plate pushes the torsion rod to rotate and at the same time moves the torsion rod toward the connecting disk through the slope, so that the loading disk is placed on the torsion rod. After the pushing plate is reset, the torsion rod is reset through the connecting spring and the torsion spring, thereby positioning the loading disk on the connecting disk.

[0012] Preferably, the feeding mechanism includes a rodless cylinder, a connecting frame and a deflection motor, the rodless cylinder is installed on the sewing machine, a slider is slidably connected to the rodless cylinder, the slider is connected to the connecting frame, and the deflection motor is installed 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 disk is connected to the output shaft of the deflection motor.

[0013] By adopting the above technical solution, the rodless cylinder drives the push plate to move toward the push rod through the slider, so that the push plate moves on the connecting frame; each time the bobbin case is replaced, the deflection motor rotates a certain angle, thereby rotating the bobbin case containing the sewing thread to a position that is convenient for the shuttle changing mechanism to grasp.

[0014] Preferably, the mounting assembly also includes a push spring, the rodless cylinder is connected to a support block, the support block is provided with 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 support groove wall.

[0015] By adopting the above technical solution, the push rod is pushed in the direction of compressing the push spring until the push rod is separated from the push plate, and the push plate is reset. This method of resetting the push plate is faster.

[0016] Preferably, the shuttle changing mechanism includes a telescopic cylinder, a rotary cylinder, a connecting plate and a grabbing assembly, the telescopic cylinder is connected to the sewing machine, the rotary cylinder is installed on the piston rod of the telescopic cylinder, the connecting plate is connected to the piston rod of the grabbing cylinder, and the grabbing assembly is connected to the connecting plate; the grabbing assembly is used to grab the bobbin case on the loading tray.

[0017] By adopting the above technical solution, the rotating cylinder is connected to the grabbing assembly through the connecting plate, the telescopic cylinder is connected to the rotating cylinder through the telescopic piston rod, and the telescopic cylinder drives the rotating cylinder and the grabbing assembly connected to the rotating cylinder to extend and retract through the telescopic piston rod.

[0018] Preferably, the grabbing assembly includes a fixed frame, a grabbing cylinder, a connecting rod, a grabbing block and a resistance block, the fixed frame is connected to the connecting plate, the grabbing cylinder is connected to the fixed frame, the connecting rod is installed on the piston rod of the grabbing cylinder, the grabbing block is also rotatably connected to the fixed frame, and the grabbing block is also connected to the piston rod of the grabbing cylinder; the fixed frame is also provided with a resistance block, the resistance block is used to resist the bobbin case, and the grabbing cylinder grabs the bobbin case through the grabbing block and the resistance block.

[0019] By adopting the above technical solution, when the piston rod of the grabbing cylinder is extended, the locking head on the grabbing block approaches the resistance block. As the piston rod continues to extend, the grabbing block flips open the flip piece, so that the locking head is inserted into the grabbing slot. Until the grabbing block flips the flip piece and fits it on the side of the resistance block, the grabbing assembly completes grabbing the bobbin case, and at this time the matching block is inserted into the grabbing slot.

[0020] Preferably, the shuttle changing mechanism further includes a grabbing detection component, which includes a support rod and a grabbing detection sensor; the support rod is connected to the rotating cylinder, and the grabbing detection sensor is connected to the support rod; the grabbing detection sensor is used to detect whether the grabbing block grabs the shuttle case.

[0021] By adopting the above technical solution, in order to reduce the situation where the grabbing component is not grabbed, a grabbing detection sensor is installed on the rotating cylinder.

[0022] Preferably, the shuttle changing mechanism further comprises a loading detection sensor, which is connected to the sewing machine; the loading detection sensor is used to detect whether the assembly has installed the replaced bobbin case on the sewing machine.

[0023] By adopting the above technical solution, in the process of replacing the bobbin case, in order to ensure that the sewing machine is provided with the replaced bobbin case, a loading detection sensor is installed on the sewing machine.

[0024] Preferably, a positioning block is connected to the loading tray, and a positioning groove is provided on the positioning block, and the positioning groove is used to position the bobbin case.

[0025] By adopting the above technical solution, the purpose of installing the positioning block on the loading tray and providing the positioning groove on the positioning block is to facilitate the placement of the bobbin case on the loading tray.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The rodless cylinder drives the push plate to move toward the resistance rod through the connecting frame. After the push plate resists the resistance rod, the push plate slides on the connecting frame and resists the torsion rod to rotate. When the fixed block on the torsion rod rotates to correspond to the installation slot on the loading tray, the loading tray can be removed from the torsion rod, so that the loading tray can be quickly removed. After the bobbin case is installed on the loading tray and re-installed on the torsion rod, the resistance rod is pushed to one side to disengage the resistance rod from the push plate. At the same time, under the action of the push spring, the push plate is reset, and the torsion rod is reset through the torsion spring. The torsion rod fixes the loading tray to the connecting tray through the fixed block, so that the loading tray can be quickly installed.

[0027] 2. By setting up the grab detection sensor, the occurrence of empty grabbing of the grab component can be reduced.

[0028] 3. By setting a loading detection sensor, it is possible to ensure that the sewing machine is provided with a replaced bobbin case during the process of replacing the bobbin case. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure used to reflect the embodiment of the present application.

[0030] Figure 2 It is a schematic diagram used to illustrate the installation positions of the shuttle changing mechanism and the feeding mechanism in the embodiment of the present application.

[0031] Figure 3 It is a structural diagram used to reflect the feeding mechanism in the embodiment of the present application.

[0032] Figure 4 It is a structural diagram for reflecting the shuttle changing mechanism in the embodiment of the present application.

[0033] Figure 5 It is a structural diagram used to reflect the grabbing component in the embodiment of the present application.

[0034] Figure 6 It is an exploded schematic diagram used to illustrate the grabbing component in the embodiment of the present application.

[0035] Figure 7 It is a partial enlarged view used to illustrate the grab block in the embodiment of the present application.

[0036] Figure 8 It is a schematic structural diagram of the bobbin case in the embodiment of the present application.

[0037] Figure 9 It is a cross-sectional schematic diagram for illustrating the bobbin case in the embodiment of the present application.

[0038] Figure 10 It is a structural diagram used to reflect the charging tray in the embodiment of the present application.

[0039] Figure 11 It is an exploded schematic diagram used to illustrate the installation components in the embodiment of the present application.

[0040] Figure 12 It is a schematic diagram used to illustrate the connection relationship between the push plate and the connecting frame in the embodiment of the present application.

[0041] Figure 13 It is a top view used to illustrate the installation components in the embodiment of the present application.

[0042] Figure 14 It is a schematic diagram of the structure of the torsion rod in the embodiment of the present application.

[0043] Figure 15 It is a schematic diagram used to illustrate the connection relationship between the support block and the interference rod in the embodiment of the present application.

[0044] Figure 16 It is a schematic diagram used to illustrate the connection relationship between the fixed block and the loading tray in the embodiment of the present application.

[0045] Description of reference numerals: 1. Sewing machine; 11. Machine head; 12. Chassis; 121. Extension block; 122. Mounting hole; 123. Material placement plate; 13. Bracket; 14. Support plate; 2. Shuttle change mechanism; 21. Telescopic cylinder; 22. Rotary cylinder; 23. Connecting plate; 24. Grabbing assembly; 241. Connecting block; 242. Fixing frame; 243. Grabbing cylinder; 244. Connecting rod; 245. Grabbing block; 246. Locking head; 247. Interference block; 248. Matching block; 25. Grabbing detection assembly; 251. Support rod; 252. Grabbing detection sensor; 26. Loading detection sensor; 3. Feeding mechanism; 31. Rodless cylinder; 311. Support block; 312. Support slot; 32. Slider; 33. Connecting frame; 331. Extension block; 34. Deflection motor ;35. Install the detection sensor;4. Loading mechanism;41. Loading tray;411. Detection hole;412. Mounting slot;413. Mounting rod;414. Ring groove;415. Positioning block;416. Positioning slot;417. Thickness block;42. Mounting assembly;421. Push rod;422. Push spring;423. Push plate;424. Push block;425. Connecting plate;426. Torsion rod;427. Push rod;428. Connecting slot;429. Fixed block;430. Connecting spring;431. Torsion spring;432. Push spring;433. Dovetail block;434. Slope;435. Mounting block;5. Bobbin case;51. Mounting cylinder;52. Push plate;521. Push hole;53. Flip plate;531. Grab slot;54. Positioning rod. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-16 This application is described in further detail.

[0047] The present application embodiment discloses an automatic shuttle changing device for a sewing machine 1, referring to Figures 1-3 , including a sewing machine 1, a shuttle changing mechanism 2, a feeding mechanism 3 and a loading mechanism 4, the sewing machine 1 includes a head 11 and a chassis 12, the upper end of the chassis 12 is fixedly connected to a material placement plate 123, the head 11 is fixedly connected to the upper end of the chassis 12, the bracket 13 is fixedly connected to the lower end of the chassis 12, a protruding block 121 is provided on one side of the chassis 12, and a mounting hole 122 is opened on the protruding block 121, the mounting hole 122 is used to install a bobbin case 5, and a sewing thread roll is provided in the bobbin case 5. The feeding mechanism 3 is installed in the chassis 12, the shuttle changing mechanism 2 is installed below the chassis 12 and is 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 transfer the bobbin case 5 filled with sewing thread to the shuttle changing mechanism 2, and the shuttle changing mechanism 2 is used to take out the empty bobbin case 5 in the mounting hole 122, and grab a bobbin case 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 chassis 12 can push the bobbin case 5 filled with sewing thread to the machine head 11.

[0048] Reference Figures 1-3 The loading mechanism 4 includes a loading tray 41 and a mounting assembly 42 . The mounting assembly 42 is mounted on the feeding mechanism 3 . The loading tray 41 is detachably mounted on the feeding mechanism 3 through the mounting assembly 42 . The loading tray 41 is used to hold the bobbin case 5 .

[0049] 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. The bottom wall of the chassis 12 is fixedly connected to the support plate 14. 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 extended. 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 mounted at both ends of the long axis of the connecting plate 23.

[0050] Reference Figures 2-4 When the bobbin case 5 in the mounting hole 122 needs to be replaced, the telescopic cylinder 21 is first retracted through the piston rod to the direction of the rotary cylinder 22 close to the support plate 14, and the grabbing assembly 24 close to the loading tray 41 grabs a bobbin case 5 with sewing thread from the loading tray 41. At the same time, the grabbing assembly 24 close to the mounting hole 122 grabs the empty bobbin case 5 in the mounting hole 122. Then the telescopic cylinder 21 extends the rotary cylinder 22 in the direction away from the support plate 14 through the piston rod, thereby taking the empty bobbin case 5 out of the mounting hole 122, and separating the bobbin case 5 with sewing thread on the grabbing assembly 24 at the other end of the connecting plate 23 from the loading tray 41. After the two grabbing assemblies 24 are rotated 180° by the rotating cylinder 22, the piston rod is retracted again by the telescopic cylinder 21, thereby driving the rotary cylinder 22 to move toward the support plate 14, so that the grabbing assembly 24 near the mounting hole 122 places the bobbin case 5 containing the sewing thread in the mounting hole 122, so that the pushing mechanism can push the bobbin case 5 containing the sewing thread to the machine head 11. At the same time, the grabbing assembly 24 near the loading tray 41 places the empty bobbin case 5 after the sewing thread is used up on the loading tray 41. Finally, the piston rod of the telescopic cylinder 21 is extended again and pushes the rotary cylinder 22 away from the support plate 14, thereby completing a replacement work.

[0051] Reference Figure 2The grabbing detection component 25 includes a support rod 251 and a grabbing detection sensor 252. The support rod 251 is fixedly connected to one side of the rotating cylinder 22. A grabbing detection sensor 252 is provided at each end of the support rod 251. Each grabbing detection sensor corresponds to a grabbing component 24. After the grabbing component 24 completes the grabbing action on the bobbin case 5, the grabbing detection sensor 252 detects whether there is a bobbin case 5 on the grabbing block 245. If there is a bobbin case 5, the automatic shuttle changing device of the sewing machine 1 operates normally. If there is no bobbin case 5, the grabbing detection sensor 252 sends an alarm message to the master control machine (not shown in the figure), and the automatic shuttle changing device of the sewing machine 1 stops working until the staff eliminates the fault and then restarts the automatic shuttle changing device of the sewing machine 1. The detection principles of the grabbing detection sensor 252, the master control machine and the grabbing detection sensor 252 are all existing technologies in this field and will not be elaborated here.

[0052] Reference Figures 4-6 In this embodiment, one of the grabbing assemblies 24 is used as an example for explanation. The grabbing assembly 24 includes a connecting block 241, a fixing frame 242, a grabbing cylinder 243, a connecting rod 244, a grabbing block 245, a locking head 246 and a resistance block 247. The connecting block 241 is fixedly connected to the end of the long axis of the connecting plate 23, and 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 grabbing cylinder 243 is fixedly connected to the fixing frame 242, the axis of the grabbing cylinder 243 is parallel to the long axis of the fixing frame 242, one end of the connecting rod 244 is hinged to the end of the piston rod of the grabbing cylinder 243, the grabbing block 245 is arc-shaped, one end of the grabbing block 245 is hinged to the fixing frame 242 close to the piston rod of the grabbing cylinder 243, and the other end extends away from the piston rod of the grabbing cylinder 243, and a hinge ear is provided at the end of the grabbing block 245 close to the piston rod of the grabbing cylinder 243, and the hinge ear is hinged to the other end of the connecting rod 244.

[0053] Reference Figure 6 and 7, a locking head 246 is fixedly mounted on the end of the grabbing block 245 away from the piston rod of the grabbing cylinder 243, and the thickness of the locking head 246 is less than the thickness of the grabbing rod. The interference block 247 is fixedly connected to the side of the fixing frame 242 away from the grabbing cylinder 243, and the interference block 247 is located at the end of the fixing frame 242 close to the grabbing block 245, and a matching block 248 is fixedly connected to the side of the interference block 247 facing the grabbing block 245. When the piston rod of the telescopic cylinder 21 retracts, the end of the interference block 247 on the fixing frame 242 close to the loading tray 41 contacts the bobbin case 5, and then the piston rod of the grabbing cylinder 243 extends. The piston rod of the grabbing cylinder 243 pushes the grabbing block 245 to rotate through the connecting rod 244, causing the locking head 246 on the grabbing block 245 to move in the direction close to the interference block 247, thereby facilitating the action of grabbing the bobbin case 5. When the piston rod of the grabbing cylinder 243 retracts, the piston rod of the grabbing cylinder 243 pulls the grabbing block 245 to rotate through the connecting rod 244, so that the locking head 246 on the grabbing block 245 moves away from the interference block 247 to release the bobbin case 5.

[0054] Reference Figures 8 and 9 The bobbin case 5 is conventionally constructed in the art and comprises a flip plate 53, a push plate 52, and a positioning rod 54. The flip plate 53 is provided with a gripping slot 531. The locking head 246 on the gripping block 245 has a thickness equal to the width of the gripping slot 531. One end of the flip plate 53 is hinged to the bobbin case 5, while the push plate 52 is slidably connected to the bobbin case 5 and positioned between the flip plate 53 and the bobbin case 5. The end of the flip plate 53 closest to the push plate 52 is provided with a protrusion (not shown) for pushing the push plate 52. The push plate 52 is also provided with a push hole 521. A return torsion spring (not shown) is provided at the connection between the flip plate 53 and the bobbin case 5, and a return spring (not shown) is provided between the push plate 52 and the bobbin case 5. When no external force is applied, the flip plate 53 abuts against the push plate 52 on the bobbin case 5. A mounting tube 51 is also fixedly connected to the bobbin case 5, with both ends open. When the flip piece 53 is flipped open from the bobbin case 5, the flip piece 53 pushes the push piece 52 to slide on the bobbin case 5 through the protrusion, so that the push hole 521 is aligned with the opening of the mounting tube 51 at one end close to the push piece 52. When the flip piece 53 is released, the flip piece 53 is fitted on the push piece 52 under the action of the return torsion spring, and the push piece 52 is reset under the action of the return spring, so that the axis of the push hole 521 is staggered with the axis of the mounting tube 51.

[0055] Reference Figures 9 and 10The loading tray 41 is provided with a mounting rod 413, and an annular groove 414 is formed at one end of the mounting rod 413 near the push piece 52. The process of installing the bobbin case 5 on the loading tray 41 is as follows: the staff first flips the flip piece 53 from the bobbin case 5, and then sleeves the bobbin case 5 on the mounting rod 413 through the mounting cylinder 51. At this time, the push hole 521 coincides with the opening of the mounting cylinder 51, and the push hole 521 on the push piece 52 is located at the annular groove 414. When the staff releases the flip piece 53, the flip piece 53 is reset by the reset torsion spring, and the push piece 52 is reset by the reset spring, so that the axis of the push hole 521 is staggered with the axis of the mounting cylinder 51, so that the push piece 52 is engaged in the annular groove 414 on the mounting rod 413 through the push hole 521, thereby installing the bobbin case 5 on the mounting rod 413. A positioning block 415 is further provided on the mounting plate. The positioning block 415 is fixedly connected to the loading plate 41. A positioning groove 416 is provided on the positioning block 415 for placing the positioning rod 54 of the bobbin case 5. There are six positioning grooves 416, which are arranged in a circumferential direction along the axis of the positioning block 415. The positioning block 415 positions the bobbin case 5 through the positioning grooves 416.

[0056] Reference Figures 5 and 6 When the piston rod of the grabbing cylinder 243 extends, the locking head 246 on the grabbing block 245 approaches the resistance block 247. As the piston rod continues to extend, the grabbing block 245 flips over the flip piece 53, so that the locking head 246 is inserted into the grabbing slot 531. Until the grabbing block 245 flips the flip piece 53 and fits it on the side of the resistance block 247, the grabbing assembly 24 completes grabbing the bobbin case 5, and at this time the matching block 248 is inserted into the grabbing slot 531.

[0057] 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 grabbing assembly 24 has installed the bobbin case 5 in the mounting hole 122. If the bobbin case 5 is installed in the mounting hole 122, the automatic shuttle changing device of the sewing machine 1 operates normally. If there is no bobbin case 5 in the mounting hole 122, the installation detection sensor 35 sends an alarm message to the master control machine, and the automatic shuttle changing device of the sewing machine 1 stops working until the staff eliminates the fault and then restarts the automatic shuttle changing device of the sewing machine 1.

[0058] Reference Figure 2 、 Figure 3 、 Figure 11The feeding mechanism 3 includes a rodless cylinder 31, a connecting frame 33 and a deflection motor 34. The rodless cylinder 31 is fixedly connected to the support plate 14. The rodless cylinder 31 is located below the telescopic cylinder 21. A slider 32 is provided on the rodless cylinder 31. The direction in which the slider 32 slides on the rodless cylinder 31 is perpendicular to the direction in which the piston rod of the telescopic cylinder 21 moves. 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. The two deflection motors 34 are respectively fixedly connected to the two ends of the length direction of the connecting frame 33. Each The output shaft of each deflection motor 34 is connected to a loading tray 41 through a mounting assembly 42, and each loading tray 41 is mounted with 6 bobbin cases 5; each time the used bobbin case 5 in the mounting hole 122 is replaced, the deflection motor 34 located directly below the grabbing assembly 24 drives the loading tray 41 to rotate 60°. When all 6 bobbin cases 5 on the loading tray 41 below the rotating motor are replaced, the slider 32 drives the connecting frame 33 to move another loading tray 41 to the bottom of the rotating cylinder 22, so that the grabbing assembly 24 can grab the bobbin case 5.

[0059] Reference Figure 3 、 Figure 10 , 6 detection holes 411 are provided on the loading tray 41, each detection hole 411 is arranged on one side of a mounting rod 413, and the bobbin case 5 installed on the mounting rod 413 covers the detection hole 411, and an installation detection sensor 35 is fixedly installed on the connecting frame 33, and the installation detection sensor 35 detects whether the bobbin case 5 is installed on the loading tray 41 through the detection hole 411.

[0060] Reference Figures 11-12 The mounting assembly 42 includes a push plate 423, a connecting plate 425 and a torsion rod 426. Two groups of mounting assemblies 42 are provided. The two groups of mounting assemblies 42 are symmetrically mounted on the connecting frame 33. Each deflection motor 34 is connected to a loading tray 41 through a group of mounting assemblies 42. Taking the left mounting assembly 42 as an example, the left side of the connecting frame 33 is provided with an extension block 331. This extension block 331 defines a dovetail groove for a push plate 423 to slide into. A dovetail block 433 is provided on the side of the push plate 423 closest to the connecting frame 33. The push plate 423 is slidably connected to the connecting frame 33 via its own dovetail block 433. The push plate 423 has a smooth surface. A push spring 422 is provided between the sidewalls of the dovetail block 433 and the sidewalls of the dovetail groove, connecting the dovetail block 433 to the dovetail groove. Two push blocks 424 are also fixedly mounted on the sidewall of the push plate 423 away from the connecting frame 33. These two push blocks 424 are located on either side of the output shaft of the deflection motor 34. Each push block 424 has a ramp 434 defined in the middle of its right sidewall, one end of which extends to the sidewall of the push plate 423. A waist-shaped groove is provided through the middle of the push plate 423, through which the output shaft of the deflection motor 34 passes.

[0061] Reference Figures 11-13 The connecting plate 425 is fixedly connected to the output shaft of the deflection motor 34, and the pushing 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 pushing plate 423 so that the pushing plate 423 can avoid the output shaft of the deflection motor 34 during the sliding process on the connecting frame 33.

[0062] Reference Figure 11 and Figure 14 Two torsion rods 426 are provided, and the two torsion rods 426 are respectively located at the pushing blocks 424 on both sides of the output shaft of the deflection motor 34, and the torsion rod 426 is slidably installed on the connecting plate 425 in a direction parallel to the axis of the output shaft of the deflection motor 34, and one end of the torsion rod 426 passes through the connecting plate 425 and extends in the direction of the pushing plate 423, and the end of the torsion rod 426 close to 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 rod 426, and the mounting block 435 is used to slide along the slope 434, and a pushed rod 427 is fixedly connected to the circumferential side wall of the mounting block 435, the pushed rod 427 is inclined in the direction of the pushing block 424, and the long axis of the pushed rod 427 is perpendicular to the long axis of the torsion rod 426. The end of the torsion rod 426 away from the connecting frame 33 is detachably connected to a fixing block 429 via a screw. A connecting slot 428 is further provided on the side wall of the torsion rod 426 between the connecting plate 425 and the fixing block 429. The connecting slot 428 is opened along the long axis of the torsion rod 426. A torsion spring 431 is sleeved on each torsion rod 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 closest to the connecting plate 425 is fixedly connected to the side wall of the connecting plate 425. The end of the torsion spring 431 away from the connecting plate 425 is provided with a hook, which extends into the connecting slot 428. The torsion spring 431 is used to twist and reset the torsion rod 426. A connecting spring 430 is further provided between the mounting block 435 on the torsion rod 426 and the connecting plate 425. The two ends of the connecting spring 430 respectively abut the connecting plate 425 and the mounting block 435.

[0063] Reference Figure 11 、 Figure 13 Two mounting slots 412 are provided on the loading tray 41, and the two mounting slots 412 on the loading tray 41 correspond one-to-one to the two torsion rods 426 respectively. The fixing blocks 429 on the two torsion rods 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.

[0064] Reference Figure 12 and Figure 13The deflection motor 34 drives the connecting plate 425 to rotate via its output shaft, which in turn drives the loading tray 41 to rotate via the torsion rod 426. The end surface of the loading tray 41, which is closest to the connecting frame 33, contacts the connecting plate 425. A thickness block 417 is provided on the end surface of the loading tray 41 that contacts the connecting plate 425. The thickness of the thickness block 417 is greater than the axial length of the torsion spring 431, thereby reducing the interference force exerted on the torsion spring 431 when the connecting plate 425 and the loading tray 41 contact each other.

[0065] Reference Figure 15 , a support block 311 is provided at both ends of the rodless cylinder 31, and the two support blocks 311 are symmetrically arranged. This embodiment is explained by taking the support block 311 located on the left side of the rodless cylinder 31 as an example. A support groove 312 is provided on the bottom wall of the support block 311, and 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 to the support groove 312. The push spring 432 is located between the side wall of the support groove 312 and the push rod 421. The push spring 432 connects the push rod 421 to the side wall of the support groove 312.

[0066] Reference Figure 3 、 Figure 11 、 Figure 15 When the rodless cylinder 31 drives the slider 32 to move to the left, the slider 32 drives the pushing plate 423 to move to the left through the connecting frame 33. When the left end of the pushing block 424 on the pushing plate 423 contacts the right end of the horizontal section of the pushing rod 421, the pushing plate 423 slides on the connecting frame 33 toward the center direction of the connecting frame 33. The right side of the pushing block 424 first pushes the pushed rod 427 to rotate clockwise. Then the pushing block 424 pushes the torsion rod 426 in the direction away from the connecting frame 33 through the ramp 434, so that the fixing block 429 rotates from the vertical state to the horizontal state, so that the fixing block 429 is aligned with the installation slot 412, and then the charging tray 41 is sleeved on the torsion rod 426 through the installation slot 412, and then refer to Figure 16 ,exist Figure 16 The torsion bar 426 on the middle left side shows the state after the push block 424 moves to the right.

[0067] Reference Figure 3 、 Figure 11 and Figure 12When the loading tray 41 needs to be fixed on the connecting plate 425, the pushing rod 421 is pushed in the direction of the compressed pushing spring 432, so that the end of the horizontal section of the pushing rod 421 slides along the end of the pushing plate 423 until the pushing rod 421 is staggered with the pushing plate 423, and the pushing plate 423 is reset under the action of the pushing spring 422. Then the torsion rod 426 rotates and resets under the action of the torsion spring 431, and the reset fixing block 429 is staggered with the mounting groove 412 on the loading tray 41. At the same time, the torsion rod 426 is also acted upon by the connecting spring 430 to move in the direction close to the connecting frame 33 until the fixing block 429 contacts the loading tray 41, thereby fixing the loading tray 41 on the connecting plate 425, and then the pushing rod 421 is released. At this time, the pushing rod 421 contacts the side wall of the pushing plate 423 under the action of the pushing spring 432. Figure 16 In the figure, the torsion rod 426 on the right side is in a state of resetting the loading tray 41 to position it on the connecting tray 425, and when the loading tray on the right side needs to be replaced, the connecting frame 33 is driven to move to the right by the rodless cylinder 31, and the above steps are repeated to align the mounting groove 412 on the loading tray 41 at the right end of the connecting frame 33 with the fixed block 429, thereby facilitating the disassembly of the loading tray 41.

[0068] The implementation principle of the automatic shuttle changing device of a sewing machine 1 in the embodiment of the present application is as follows: the staff installs 6 bobbin cases 5 on the loading tray 41, and then installs the loading tray 41 on the connecting plate 425 through the installation component 42, and then starts the sewing machine 1 and the automatic shuttle changing device of the sewing machine 1. As the sewing machine 1 continues to work, the sewing thread in the bobbin case 5 in the installation hole 122 is pulled out by the sewing machine 1. After the sewing thread is completely pulled out, the sewing machine 1 sends a shuttle changing signal to the master control machine through the internal sensor. After receiving the signal, the master control machine changes the shuttle. Mechanism 2 replaces the bobbin case 5 in the mounting hole 122. Each time the bobbin case 5 is replaced, the deflection motor 34 deflects 60°. After the output shaft of the deflection motor 34 rotates one circle, a disc-changing signal is sent to the master control machine. After the master control machine receives the signal, the rodless cylinder 31 slides the deflection motor 34 and the loading tray 41 to the bottom of the rotating cylinder 22 through the slider 32. At this time, the staff removes the previous loading tray 41 from the mounting assembly 42, and then installs the loading tray 41 filled with bobbin cases 5 on the connecting disk 425 through the mounting assembly 42.

[0069] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic shuttle changing device for a sewing machine, characterized in that: The invention comprises 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 installed on a sewing machine (1); the loading mechanism (4) comprises 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 a bobbin case (5); the shuttle changing mechanism (2) is used to replace the bobbin case (5) on the sewing machine (1); The feeding mechanism (3) is used to transport the loading tray (41) to the shuttle exchange mechanism (2); the mounting assembly (42) includes a torsion rod (426); the torsion rod (426) is mounted on the feeding mechanism (3); a fixing block (429) is provided on the torsion rod (426); a mounting slot (412) for the fixing block (429) to pass through is provided on the loading tray (41); and the fixing block (429) is used to position the loading tray (41) on the feeding mechanism (3).

2. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that: The mounting assembly further comprises 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); the push rod (421) is used to push the push plate (423); the torsion rod (426) is connected to the connecting plate (425); the push plate (423) is used to push the torsion rod (426); and the torsion rod (426) is used to position the loading plate (41) On the connecting disk (425), the pushing plate (423) is provided with a pushing block (424), the pushing block (424) is provided with a slope (434) for contacting the torsion rod (426), the torsion rod (426) is provided with a pushed rod (427), the pushing plate (423) pushes the pushed rod (427) to rotate through the pushing block (424), the torsion spring (431) is installed on the torsion rod (426), and the torsion spring (431) connects the torsion rod (426) and the connecting disk (425).

3. The automatic shuttle changing device for a sewing machine according to claim 2, characterized in that: The mounting assembly is further connected to a spring (430). A mounting block (435) is provided at one end of the torsion rod (426) close to the feeding mechanism (3). The mounting block (435) is used to abut against the slope (434). The connecting spring (430) is mounted on the torsion rod (426), and the connecting spring (430) connects the mounting block (435) to the connecting plate (425). The profile of the fixing block (429) is consistent with the profile of the mounting slot (412).

4. The automatic shuttle changing device for a sewing machine according to claim 2, characterized in that: The feeding mechanism (3) comprises 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); and the connecting disk (425) is connected to the output shaft of the deflection motor (34).

5. The automatic shuttle changing device for a sewing machine according to claim 4, characterized in that: The mounting assembly (42) further includes a push spring (432), the rodless cylinder (31) is connected to a support block (311), the support block (311) is provided with a support groove (312) for the push rod (421) to slide, the push spring (432) is connected in the support groove (312), and the push spring (432) connects the push rod (421) to the groove wall of the support groove (312).

6. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that: The shuttle changing mechanism (2) comprises a telescopic cylinder (21), a rotary cylinder (22), a connecting plate (23) and a grabbing 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 grabbing cylinder (243); the grabbing assembly (24) is connected to the connecting plate (23); and the grabbing assembly (24) is used to grab the bobbin case (5) on the loading tray (41).

7. The automatic shuttle changing device for a sewing machine according to claim 6, characterized in that: The grabbing assembly (24) comprises a fixing frame (242), a grabbing cylinder (243), a connecting rod (244), a grabbing block (245) and a resisting block (247). The fixing frame (242) is connected to the connecting plate (23), the grabbing cylinder (243) is connected to the fixing frame (242), the connecting rod (244) is installed on the piston rod of the grabbing cylinder (243), the grabbing block (245) is also rotatably connected to the fixing frame (242), the grabbing block (245) is also connected to the piston rod of the grabbing cylinder (243), and a resisting block (247) is further provided on the fixing frame (242). The resisting block (247) is used to resist the bobbin case (5), and the grabbing cylinder (243) grabs the bobbin case (5) through the grabbing block (245) and the resisting block (247).

8. The automatic shuttle changing device for a sewing machine according to claim 7, characterized in that: The shuttle-changing mechanism (2) further comprises a grabbing detection assembly (25), the grabbing detection assembly (25) comprising a support rod (251) and a grabbing detection sensor (252), the support rod (251) being connected to the rotary cylinder (22), the grabbing detection sensor (252) being connected to the support rod (251), and the grabbing detection sensor (252) being used to detect whether the grabbing block (245) has grabbed the bobbin case (5).

9. The automatic shuttle changing device for a sewing machine according to claim 7, characterized in that: The shuttle changing mechanism (2) further comprises a loading detection sensor (26), which is connected to the sewing machine (1) and is used to detect whether the assembly has installed the replaced bobbin case (5) on the sewing machine (1).

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

Images