An automatic shuttle changing device for a sewing machine

Abstract

This invention discloses an automatic shuttle changing device for a sewing machine, comprising: a shuttle magazine, a turntable, a guide ring assembly, a shuttle changing mechanism, and a clamping rod for holding the shuttle. The turntable is rotatably mounted on the surface of the shuttle magazine. A first drive motor for intermittently rotating the turntable is fixedly mounted on one side of the shuttle magazine. The surface of the turntable has several grooves, and a shuttle seat is rotatably mounted between each groove. One end of the shuttle seat has a bent bend, and a ball bearing is movably mounted on the surface of the bent bend. In this invention, by setting a mechanical shuttle changing structure, the first drive motor drives the turntable to rotate, causing several shuttle seats carrying shuttles on its surface to revolve for shuttle changing operations. The intermittent transmission between the turntable and the shuttle head, combined with the rotation and lifting / pulling motion of the clamping rod, ensures accurate shuttle changing positioning. The structure is simple and requires no repeated alignment.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, specifically to an automatic shuttle changing device for sewing machines. Background Technology

[0002] A flatbed sewing machine relies on a bobbin to interweave the top and bottom threads, ultimately completing the sewing process. When the bottom thread on the bobbin runs out, a new bobbin fully wrapped with bottom thread is needed before sewing can continue. Currently, this is done manually. Manual bobbin changing is inefficient and lacks automation. Furthermore, the sewing process may require different colors, thicknesses, or materials of thread, making manual bobbin changing cumbersome. This is especially true for future intelligent robotic sewing, where assembly line operations demand highly automated and integrated bobbin changing as well.

[0003] Currently, automatic bobbin changing devices generally consist of a turntable and multiple bobbins and bobbin cases pre-wound with thread placed on the turntable. When the thread on the bobbin inside the sewing machine's rotary hook runs out, a servo robot automatically removes the bobbin and bobbin case from the rotary hook, and then automatically transfers the thread-wound bobbin and bobbin case from the turntable into the rotary hook, thus achieving automatic bobbin changing. However, the servo robot's structure is overly complex, and its operational precision requires real-time adjustment using algorithms, resulting in low work efficiency and high production costs. Therefore, this paper researches and improves upon existing technologies to provide an automatic bobbin changing device for sewing machines, aiming to solve current problems and enhance practical value. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by the present invention is as follows: an automatic shuttle changing device for a sewing machine, comprising: a shuttle magazine, a turntable base, a guide ring assembly, a shuttle changing mechanism, and a clamping rod for holding the shuttle. The turntable base is rotatably mounted on the surface of the shuttle magazine. A first drive motor for driving the turntable base to rotate intermittently is fixedly mounted on one side of the shuttle magazine. The surface of the turntable base is provided with several grooves, and a shuttle base is rotatably mounted between each groove. One end of the shuttle base is provided with a bent bend, and a ball head is movably mounted on the surface of the bent bend.

[0006] The guide ring assembly includes a fixed base, a revolution guide groove and an exit guide groove, and several magnetic blocks embedded in the surfaces of the fixed base and the exit guide groove. The fixed base is fixedly installed on the surface of the shuttle head, the revolution guide groove is fixedly installed on the outer periphery of the fixed base, and the surfaces of the revolution guide groove and the exit guide groove are provided with guide grooves for guiding the sliding movement of the ball head. The exit guide groove is embedded in the surface of the guide groove. The ball head is a ferromagnetic spherical structure.

[0007] In a preferred embodiment, the present invention can be further configured such that: a plurality of slides are fixedly installed on the surface of the turntable base, one end of the slides is slidably attached to the surface of the shuttle magazine to guide the turntable base to rotate and slide on the surface of the shuttle magazine, and the centers of the turntable base and the shuttle magazine are located on the same straight line.

[0008] In a preferred embodiment, the present invention can be further configured as follows: the output end of the first drive motor passes through the surface of the turntable base and a rotating head is fixedly installed thereon; two transmission pins located on the same diameter line of the rotating head are rotatably installed on the surface of the rotating head; the surface of the turntable base is provided with a plurality of intermittent transmission grooves arranged in a one-to-one correspondence with the shuttle head base; the interval between adjacent intermittent transmission grooves is equal to the interval between the two transmission pins.

[0009] In a preferred embodiment, the present invention can be further configured such that: the fixed base is arc-shaped and its two ends are connected to the two ends of the outgoing guide groove; the outgoing guide groove is semi-circular and protrudes from the surface of the orbital guide groove; and the magnetic block is used to magnetically attract the ball head so that it slides against the inner wall of the orbital guide groove and the outgoing guide groove.

[0010] In a preferred embodiment, the present invention can be further configured such that: the bottom end of the shuttle head magazine is provided with a notch for the shuttle head seat to flip and be exported, and the outlet guide groove is arranged corresponding to the notch.

[0011] In a preferred embodiment, the present invention can be further configured as follows: the shuttle changing mechanism includes a main rotating wheel, a splined sleeve, a main shaft, a crank lever, and a second drive motor. The second drive motor is fixed to one side of the shuttle magazine for driving the rotation of the main rotating wheel. The top end of the main shaft is provided with a splined rod that is slidably sleeved on the inner side of the splined sleeve. A transmission box is fixedly installed on the surface of the shuttle magazine, and the main rotating wheel and the crank lever are rotatably installed inside the transmission box.

[0012] In a preferred embodiment, the present invention can be further configured as follows: the spline sleeve is rotatably mounted in the transmission box and a plurality of evenly distributed cam pins are fixedly mounted on its surface; the surface of the main rotating wheel is provided with a plurality of intermittent guide grooves that mesh with the cam pins; and the chuck is fixedly mounted on the bottom end of the main shaft.

[0013] In a preferred embodiment, the present invention can be further configured as follows: a cam groove is provided on one side of the main rotor; a sliding pin is fixedly installed on the surface of the crank lever and sleeved on the inner side of the cam groove; the sliding pin slides against the inner side of the cam groove; a lifting pin is fixedly installed on one end of the crank lever; a collar block is fixedly installed on the surface of the main shaft; and the lifting pin slides on the surface of the collar block.

[0014] In a preferred embodiment, the present invention can be further configured such that: both ends of the clamping rod are provided with slots for clamping the sewing machine shuttle, and a clamping pin is embedded in the surface of the clamping rod, wherein the clamping pin is a spring-loaded pin structure.

[0015] The beneficial effects achieved by this invention are as follows:

[0016] 1. In this invention, by setting a mechanical shuttle changing structure, the first drive motor drives the turntable to rotate and perform the changing operation by rotating the multiple shuttle head seats on the surface. The intermittent transmission between the turntable and the turntable, combined with the rotation and lifting / pulling motion of the chuck rod, ensures accurate positioning during changing. The structure is simple and does not require repeated alignment.

[0017] 2. In this invention, a novel turntable guiding structure is adopted. During the movement of the shuttle head seat tooling driven by the turntable seat, the guide ring assembly and the ball head slide together through the magnetic attraction effect, so that the shuttle head seat automatically disengages from the transfer tooling of the chuck when it reaches the bottom surface of the shuttle head magazine. The structure is simple and the positioning is accurate.

[0018] 3. In this invention, the rotation and lifting motion of the chuck rod are automatically realized under the drive of the second drive motor, and the automatic material discharge of the shuttle head seat enables rapid switching of the shuttle, thereby improving work efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0020] Figure 2 This is an exploded structural diagram of an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the surface structure of the turntable seat according to an embodiment of the present invention;

[0022] Figure 4 This is an exploded view of the guide ring assembly according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of a turntable base structure according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the turntable base and rotating head structure according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the shuttle mechanism structure according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of a crank lever mounting structure according to an embodiment of the present invention.

[0027] Figure label:

[0028] 100. Shuttle head holder; 110. First drive motor; 120. Rotary head; 121. Transmission pin;

[0029] 200. Turntable base; 210. Shuttle head base; 220. Ball head; 211. Inclined elbow; 201. Slide; 202. Groove; 203. Intermittent transmission groove;

[0030] 300. Guide ring assembly; 310. Fixing base; 320. Revolution guide groove; 330. Outbound guide groove; 340. Magnetic block;

[0031] 400. Shuttle changing mechanism; 410. Main wheel; 420. Spline sleeve; 430. Main shaft; 440. Crank lever; 450. Second drive motor; 411. Intermittent guide groove; 412. Cam groove; 421. Cam pin; 431. Collar block; 432. Spline rod; 441. Sliding pin; 442. Lifting pin;

[0032] 500, Chuck bar; 510, Chuck pin. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0034] The following describes, with reference to the accompanying drawings, some embodiments of an automatic shuttle changing device for a sewing machine.

[0035] Combination Figure 1-8 As shown, the present invention provides an automatic shuttle changing device for a sewing machine, comprising: a shuttle magazine 100, a turntable base 200, a guide ring assembly 300, a shuttle changing mechanism 400, and a clamping rod 500 for holding the shuttle. The turntable base 200 is rotatably mounted on the surface of the shuttle magazine 100. A first drive motor 110 for driving the turntable base 200 to rotate intermittently is fixedly mounted on one side of the shuttle magazine 100. The surface of the turntable base 200 is provided with a plurality of grooves 202, and a shuttle base 210 is rotatably mounted between each groove 202. One end of the shuttle base 210 is provided with a bent bend 211, and a ball head 220 is movably mounted on the surface of the bent bend 211.

[0036] The guide ring assembly 300 includes a fixed base 310, a revolution guide groove 320, and an outgoing guide groove 330, as well as a number of magnetic blocks 340 embedded in the surfaces of the fixed base 310 and the outgoing guide groove 330. The fixed base 310 is fixedly installed on the surface of the shuttle head magazine 100, the revolution guide groove 320 is fixedly installed on the outer periphery of the fixed base 310, and the surfaces of the revolution guide groove 320 and the outgoing guide groove 330 are provided with guide grooves for guiding the sliding movement of the ball head 220. The outgoing guide groove 330 is embedded in the surface of the guide groove, and the ball head 220 is a ferromagnetic sphere structure.

[0037] In this embodiment, a plurality of slides 201 are fixedly installed on the surface of the turntable 200. One end of the slide 201 slides against the surface of the shuttle magazine 100 to guide the turntable 200 to rotate and slide on the surface of the shuttle magazine 100. The centers of the turntable 200 and the shuttle magazine 100 are located on the same straight line.

[0038] In this embodiment, the output end of the first drive motor 110 passes through the surface of the turntable seat 200 and is fixedly mounted with a rotating head 120. Two transmission pins 121 located on the same diameter line of the rotating head 120 are rotatably mounted on the surface of the rotating head 120. The surface of the turntable seat 200 is provided with a plurality of intermittent transmission grooves 203 arranged in a one-to-one correspondence with the shuttle head seat 210. The interval between adjacent intermittent transmission grooves 203 is equal to the interval between the two transmission pins 121.

[0039] Specifically, through the intermittent transmission between the rotating head 120 and the intermittent transmission groove 203, the first drive motor 110 drives the turntable seat 200 to rotate intermittently, and the rotation angle is equal to the included angle between the shuttle head seats 210.

[0040] In this embodiment, the fixed base 310 is arc-shaped and its two ends are connected to the two ends of the outgoing guide groove 330. The outgoing guide groove 330 is semi-circular and protrudes from the surface of the orbital guide groove 320. The magnetic block 340 is used to magnetically attract the ball head 220 so that it slides against the inner wall of the orbital guide groove 320 and the outgoing guide groove 330.

[0041] Specifically, under the guidance of the revolution guide groove 320 and the outbound guide groove 330, the ball head 220 always slides in contact with the inner side of the revolution guide groove 320 and the outbound guide groove 330.

[0042] In this embodiment, the bottom end of the shuttle head storage 100 is provided with a notch for the shuttle head seat 210 to be flipped and discharged, and the discharge guide groove 330 is arranged corresponding to the notch.

[0043] In this embodiment, the shuttle changing mechanism 400 includes a main rotating wheel 410, a splined sleeve 420, a main shaft 430, a crank lever 440, and a second drive motor 450. The second drive motor 450 is fixed to one side of the shuttle head magazine 100 for driving the rotation of the main rotating wheel 410. The top end of the main shaft 430 is provided with a splined rod 432 that is slidably sleeved inside the splined sleeve 420. A transmission box is fixedly installed on the surface of the shuttle head magazine 100, and the main rotating wheel 410 and the crank lever 440 are rotatably installed inside the transmission box.

[0044] Furthermore, the spline sleeve 420 is rotatably mounted in the transmission box and has several evenly distributed cam pins 421 fixedly mounted on its surface. The surface of the main rotating wheel 410 is provided with several intermittent guide grooves 411 that mesh with the cam pins 421. The chuck rod 500 is fixedly mounted on the bottom end of the main shaft rod 430.

[0045] Specifically, the rotation of the main rotor 410 and the meshing motion of the intermittent guide groove 411 and the cam pin 421 realize the intermittent rotation of the main shaft 430 and the chuck 500, that is, the main shaft 430 rotates 180 degrees to switch the position of the new shuttle with wire and the withdrawn shuttle.

[0046] Furthermore, a cam groove 412 is provided on one side of the main rotor 410, and a sliding pin 441 is fixedly installed on the surface of the crank lever 440, which is sleeved on the inner side of the cam groove 412. The sliding pin 441 slides against the inner side of the cam groove 412. A lifting pin 442 is fixedly installed on one end of the crank lever 440, and a collar block 431 is fixedly installed on the surface of the main shaft 430. The lifting pin 442 slides on the surface of the collar block 431.

[0047] Specifically, the cam groove 412 and the sliding pin 441 work together to deflect one end of the crank lever 440. The lifting pin 442 engages with the collar block 431, causing the main shaft 430 to be lifted and slid under the sleeve of the spline sleeve 420, thus installing the shuttle and engaging the new shuttle with the sewing machine shuttle head end. The shuttle with empty thread engages with the surface of the shuttle head seat 210.

[0048] In this embodiment, both ends of the chuck bar 500 are provided with slots for clamping the sewing machine shuttle, and a chuck pin 510 is embedded in the surface of the chuck bar 500. The chuck pin 510 is a spring-loaded pin structure.

[0049] Working principle and usage process of this invention:

[0050] The automatic shuttle changer is positioned on one side of the sewing machine. One side of the chuck bar 500 extends to the shuttle change end of the sewing machine, allowing the chuck bar 500 to hold the shuttle as it exits the machine. During the shuttle change, the first drive motor 110 drives the turntable 120 to rotate. The transmission pin 121 on the surface of the turntable 120 engages with the intermittent transmission groove 203, causing the turntable seat 200 to rotate on the surface of the shuttle head magazine 100. The shuttle head seat 210 revolves, and the ball head 220 at one end of its bent elbow 211 moves along a fixed path. The shuttle head 210 slides inside the rotating guide groove 320 until the ball head 220 on the surface of a certain shuttle head 210 enters the outlet guide groove 330. Under the magnetic attraction of the magnetic block 340, the shuttle head 210 deflects inside the groove 202. The shuttle head 210 drives the shuttle to deflect 90 degrees and is led out from the bottom end of the shuttle head magazine 100 into the clamping groove at one end of the clamping rod 500. Under the abutment of the clamping pin 510, it is clamped. The other end of the clamping rod 500 simultaneously clamps the shuttle that the sewing machine is withdrawing.

[0051] Driven by the second drive motor 450, the main rotating wheel 410 rotates, and the intermittent guide groove 411 and cam pin 421 mesh, realizing the intermittent rotation of the main shaft 430 and the chuck rod 500. That is, the main shaft 430 rotates 180 degrees to switch the position of the new shuttle with thread and the withdrawn shuttle. At the same time, under the cooperation of the cam groove 412 and the sliding pin 441, one end of the crank lever 440 deflects. The lifting pin 442 meshes with the collar block 431, causing the main shaft 430 to be lifted and slid under the sleeve of the spline sleeve 420 to install the shuttle, so that the new shuttle engages with the end of the sewing machine shuttle head, and the shuttle with empty thread engages with the surface of the shuttle head seat 210, completing the entire shuttle changing movement.

[0052] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic shuttle changing device for a sewing machine, characterized in that, include: The assembly includes a shuttle magazine (100), a turntable base (200), a guide ring assembly (300), a shuttle changing mechanism (400), and a chuck rod (500) for holding the shuttle. The turntable base (200) is rotatably mounted on the surface of the shuttle magazine (100). A first drive motor (110) for intermittently rotating the turntable base (200) is fixedly mounted on one side of the shuttle magazine (100). The surface of the turntable base (200) is provided with several grooves (202), and a shuttle base (210) is rotatably mounted between each groove (202). One end of the shuttle base (210) is provided with a bent elbow (211), and a ball head (220) is movably mounted on the surface of the bent elbow (211). The guide ring assembly (300) includes a fixed base (310), a revolution guide groove (320), and an outgoing guide groove (330), as well as a plurality of magnetic blocks (340) embedded in the surfaces of the fixed base (310) and the outgoing guide groove (330). The fixed base (310) is fixedly installed on the surface of the shuttle head magazine (100). The revolution guide groove (320) is fixedly installed on the outer periphery of the fixed base (310). The surfaces of the revolution guide groove (320) and the outgoing guide groove (330) are provided with guide grooves for guiding the sliding movement of the ball head (220). The outgoing guide groove (330) is embedded in the surface of the guide groove. The ball head (220) is a ferromagnetic sphere structure.

2. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, A plurality of slides (201) are fixedly installed on the surface of the turntable base (200). One end of the slide (201) slides against the surface of the shuttle magazine (100) to guide the turntable base (200) to rotate and slide on the surface of the shuttle magazine (100). The centers of the turntable base (200) and the shuttle magazine (100) are located on the same straight line.

3. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, The output end of the first drive motor (110) passes through the surface of the turntable seat (200) and is fixedly mounted with a rotating head (120). Two transmission pins (121) located on the same diameter line of the rotating head (120) are rotatably mounted on the surface of the rotating head (120). The surface of the turntable seat (200) is provided with a plurality of intermittent transmission grooves (203) arranged in a one-to-one correspondence with the shuttle head seat (210). The interval between adjacent intermittent transmission grooves (203) is equal to the interval between the two transmission pins (121).

4. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, The fixed base (310) is arc-shaped and its two ends are connected to the two ends of the outbound guide groove (330). The outbound guide groove (330) is semi-circular and protrudes from the surface of the revolution guide groove (320). The magnetic block (340) is used to magnetically attract the ball head (220) so that it slides against the inner wall of the revolution guide groove (320) and the outbound guide groove (330).

5. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, The bottom end of the shuttle head magazine (100) is provided with a notch groove for the shuttle head seat (210) to be flipped and discharged, and the discharge guide groove (330) is arranged corresponding to the notch groove.

6. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, The shuttle changing mechanism (400) includes a main rotating wheel (410), a splined sleeve (420), a main shaft (430), a crank lever (440), and a second drive motor (450). The second drive motor (450) is fixed to one side of the shuttle head magazine (100) for driving the rotation of the main rotating wheel (410). The top end of the main shaft (430) is provided with a splined rod (432) that is slidably sleeved inside the splined sleeve (420). A transmission box is fixedly installed on the surface of the shuttle head magazine (100). The main rotating wheel (410) and the crank lever (440) are rotatably installed inside the transmission box.

7. An automatic shuttle changing device for a sewing machine according to claim 6, characterized in that, The spline sleeve (420) is rotatably mounted in the transmission box and has several evenly distributed cam pins (421) fixedly mounted on its surface. The surface of the main rotating wheel (410) is provided with several intermittent guide grooves (411) that mesh with the cam pins (421). The chuck rod (500) is fixedly mounted on the bottom end of the main shaft rod (430).

8. An automatic shuttle changing device for a sewing machine according to claim 6, characterized in that, A cam groove (412) is provided on one side of the main rotor (410). A sliding pin (441) is fixedly installed on the surface of the crank lever (440) and sleeved on the inner side of the cam groove (412). The sliding pin (441) slides against the inner side of the cam groove (412). A lifting pin (442) is fixedly installed on one end of the crank lever (440). A collar block (431) is fixedly installed on the surface of the main shaft (430). The lifting pin (442) slides on the surface of the collar block (431).

9. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, Both ends of the clamping rod (500) are provided with slots for clamping the sewing machine shuttle, and a clamping pin (510) is embedded in the surface of the clamping rod (500), the clamping pin (510) being a spring-loaded pin structure.

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