Self-winding bobbin thread spool replacement device

Abstract

The invention relates to sewing equipment, in particular a multi-head embroidery machine, and more particularly a self-winding thread bobbin replacement device. The purpose is to provide a self-winding thread bobbin replacement device that can automatically replace the bottom thread of the embroidery machine bobbin, thereby improving production efficiency and reducing production costs. The technical solution is a self-winding thread bobbin replacement device, including a rotating shuttle unit; characterized in that: the device further includes a replacement unit that transposes multiple bobbin cases, a picking unit that picks and places bobbin cases, a residual thread removal unit that removes residual bottom thread from bobbin cases, a thread feeding unit that feeds bottom thread into bobbin cases, a clutch winding unit that drives bobbin rotation, a thread clamping unit that winds bottom thread onto bobbin cases, a cutting unit that cuts bottom thread, and a controller.

Description

Technical Field

[0001] This invention relates to sewing equipment, specifically a multi-head embroidery machine, and more particularly to a self-winding bobbin replacement device. Background Technology

[0002] The bobbin and bobbin case are essential parts of an embroidery machine. The bobbin is installed inside the bobbin case and wound with bobbin thread. The bobbin case, containing the bobbin, is then inserted into the rotary hook below the needle plate of the embroidery machine, where it works with the machine's needle to sew. When the bobbin thread runs out, the bobbin case and bobbin need to be removed, the remaining bobbin thread from the old bobbin needs to be removed, and then new bobbin thread needs to be reinstalled, and this process is repeated. Currently, the replacement and winding of the bobbin thread are mainly done manually.

[0003] Since 1992, the total number of embroidery machines installed in China has exceeded one million. These machines operate day and night, but the bobbin is small and requires very little thread, necessitating manual replacement and rewinding every so often. Furthermore, the bobbin and bobbin case are located below the needle plate, requiring workers to bend over to change them, resulting in high labor intensity and low efficiency. Additionally, delays in timely bobbin replacement lead to prolonged machine downtime, impacting production efficiency. Solving these problems is a pressing need in the embroidery machine industry.

[0004] By analyzing the manual bobbin and bobbin case replacement process, the automated bobbin and bobbin case replacement process can be broken down into several specific mechanical actions, mainly divided into the following two categories: 1. First, remove the bobbin and bobbin case from the rotary hook unit, remove the old bobbin thread remaining inside the bobbin and bobbin case, then insert the end of the new bobbin thread into the bobbin and bobbin case, drive the bobbin to rotate so that the bobbin thread is wound around the bobbin, cut the bobbin thread, and finally reinstall the bobbin and bobbin case into the rotary hook unit; 2. Remove the bobbin and bobbin case from the rotary hook unit, take out the bobbin with the used bobbin thread, then insert the bobbin with the bobbin thread wound around it, and finally reinstall the bobbin and bobbin case into the rotary hook unit;

[0005] The first type of method has a high degree of integration but involves many complex actions. The second type, while simpler in structure due to the omission of winding and cutting actions, still requires external devices for these actions, offering no significant advantage and resulting in a larger overall size. Utilizing these principles to design a fully automated bobbin and bobbin case changing device would undoubtedly improve production efficiency and reduce production costs. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide a self-winding bobbin replacement device. This device should be able to automatically replace the bobbin thread of an embroidery machine, thereby improving production efficiency and reducing production costs.

[0007] The technical solution of this invention is:

[0008] A self-winding bobbin replacement device includes a rotary hook unit; characterized in that: the device further includes a replacement unit for swapping multiple bobbins and bobbin cases, a bobbin and bobbin case removal unit for picking up and putting in bobbins and bobbin cases, a residual thread removal unit for removing residual thread from bobbins and bobbin cases, a thread feeding unit for feeding thread into bobbins and bobbin cases, a clutch winding unit for driving the bobbin to rotate, a thread clamping unit for winding the thread onto the bobbin case, a cutting unit for cutting the thread, and a controller.

[0009] The replacement unit includes a shifting frame, a double-seat shuttle bed capable of loading two shuttle cores and shuttle cases, and a shifting motor that drives the double-seat shuttle bed to rotate.

[0010] The pick-and-place unit includes a pick-and-place mechanism for picking up and placing the bobbin and bobbin case, and a pick-and-place arm mechanism for driving the pick-and-place mechanism to move between the rotary hook unit and the replacement unit; the pick-and-place mechanism includes a pick-and-place pressure table, a pick-and-place hook that is oscillatingly positioned on the pick-and-place pressure table, and a pick-and-place push rod that pushes the pick-and-place hook to move; the pick-and-place arm mechanism includes a pick-and-place arm frame, a guide plate with a guide groove, a pick-and-place arm motor, a pick-and-place arm rotating plate that can move along the guide groove, and a pick-and-place arm transmission assembly that transmits the power of the pick-and-place arm motor to drive the pick-and-place arm rotating plate to move; the pick-and-place pressure table is connected to the pick-and-place arm rotating plate.

[0011] The cable feeding unit includes a cable feeding frame, a cable feeding needle, a guide coil, a cable feeding carriage that can be horizontally slidably positioned on the cable feeding frame, a cable feeding motor, a cable feeding transmission mechanism that transmits the power of the cable feeding motor to drive the movement of the cable feeding carriage, a cable feeding motor that is fixed to the cable feeding carriage and drives the cable feeding needle to move up and down, and a tube frame for inserting the bottom thread tube; the cable feeding needle is a hollow tube, and an air source is connected to the cable feeding needle through an air supply pipe to generate airflow at the front end of the cable feeding needle;

[0012] The clutch winding unit includes a winding frame, a top head, a winding lifting frame, a winding rotary motor that drives the top head to rotate and is fixed to the winding lifting frame, a winding lifting motor, a winding transmission mechanism that transmits power from the winding lifting motor to drive the winding lifting frame to move up and down, and a sensor.

[0013] The wire clamping unit includes a wire clamping frame, a wire clamping hook, a wire clamping connecting plate, a wire clamping lifting motor, a wire clamping rotary motor fixed to the wire clamping connecting plate, a wire clamping lifting transmission mechanism that transmits the power of the wire clamping lifting motor to drive the wire clamping connecting plate to move up and down, and a wire clamping rotary transmission mechanism that transmits the power of the wire clamping rotary motor to drive the wire clamping hook to rotate.

[0014] The shearing unit includes a shearing frame, a bottom thread shear and a bottom thread clamp mounted on the shearing frame, a shearing motor, and a shearing transmission mechanism that transmits the power of the shearing motor to drive the bottom thread shear and the bottom thread clamp to open and close.

[0015] The residual thread removal unit includes a thread suction mechanism for sucking out residual thread from the bobbin and bobbin case, a thread hooking mechanism for removing the thread from the thread suction mechanism, a thread pulling mechanism for pulling out the thread from the thread suction mechanism, a linkage mechanism for cooperating between the thread suction mechanism and the thread pulling mechanism, and a displacement mechanism for driving the residual thread removal unit to move horizontally.

[0016] The double shuttle bed is provided with a pick-up and drop-off station and a rotating station. Each station has a winding hole on its bottom surface and baffles on both sides of the double shuttle bed. The handle push rod is fixed to the handle press table through the handle push rod frame, and the handle connecting rod is rotatably positioned between the telescopic rod of the handle push rod and the handle hook.

[0017] The residual thread removal unit is located on the side of the double-seat shuttle bed; the residual thread removal unit has a waiting station and a thread cleaning station; the shifting mechanism includes a residual thread removal frame, a shifting frame that can be horizontally slidably positioned on the residual thread removal frame, a shifting motor, and a shifting transmission assembly; the thread suction mechanism includes a suction nozzle, a vacuum pump, and a pipeline; the thread hooking mechanism includes a thread hooking rod and a thread hooking push rod; the thread pulling mechanism includes a thread pulling drive wheel, a thread pulling driven wheel, a thread pulling motor, and a clamping assembly; the linkage mechanism includes a linkage motor and a linkage assembly.

[0018] A buffer mechanism is provided between the handle pressing platform and the arm turning plate; in the buffer mechanism, the arm turning plate is provided with a guide post, the handle pressing platform is provided with a sliding sleeve that cooperates with the guide post, the buffer spring is provided in the sliding sleeve for pushing the handle pressing platform, the sliding sleeve has a limiting groove, and the limiting nut passes through the limiting groove and is fixed with the guide post.

[0019] The guide plate includes a left guide plate and a right guide plate arranged in parallel and provided with guide grooves. The arm-removing rotating plate is movably positioned between the left guide plate and the right guide plate through a guide shaft that cooperates with the guide grooves.

[0020] The left guide plate and the right guide plate are respectively provided with a left guide groove and a right guide groove. The arm-removing plate is provided with a left guide shaft that cooperates with the left guide groove and a right guide shaft that cooperates with the right guide groove. The left guide groove includes a horizontal section of the left guide groove, and the right guide groove includes a horizontal section of the right guide groove and an inclined section of the right guide groove.

[0021] The arm-removing transmission assembly includes an active pulley driven by an arm-removing motor, a passive pulley, a synchronous belt connecting the active pulley and the passive pulley, a swing arm fixed to the passive pulley and provided with a groove, a slider that can slide along the groove and be rotatably positioned on the left guide shaft, and a swing arm spring that assists the movement of the swing arm.

[0022] The shifting frame, arm removal frame, wire feeding frame, winding frame, wire clamping frame, cutting frame, residual wire removal frame, and tube frame are fixed as one unit and are also fixed to the embroidery machine frame.

[0023] The controller is electrically connected to the transposition motor, the hand release push rod, the arm release motor, the wire feeding motor, the wire laying motor, the winding rotation motor, the winding lifting motor, the wire clamping lifting motor, the wire clamping rotary motor, the shearing motor, the shifting motor, the vacuum pump, the wire drawing motor, the hook push rod, the linkage motor, and the sensor.

[0024] The beneficial effects of this invention are:

[0025] This invention includes a replacement unit, a picking and changing unit, a thread feeding and laying unit, a clutch winding unit, a thread clamping unit, a cutting unit, and a residual thread removal unit. Through the coordinated operation of these units, the bobbin and bobbin case with the used bobbin thread can be picked up from the rotary hook unit, and another bobbin and bobbin case with the bobbin thread installed can be put back into the rotary hook unit. At the same time, the replaced bobbin and bobbin case is cleaned, wound, clamped, and cut. The entire replacement process is fully automated, requiring no manual operation. The operation is fast, greatly reducing labor intensity, minimizing downtime of the embroidery machine, saving production costs, and improving production efficiency. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0027] Figure 2 This is a schematic diagram of the main structure of the present invention.

[0028] Figure 3 This is a top view of the structure of the present invention.

[0029] Figure 4 This is an exploded view of the present invention.

[0030] Figure 5 This is one of the schematic diagrams showing the motion state of the switching unit of the present invention.

[0031] Figure 6 This is the second schematic diagram of the motion state of the switching unit of the present invention.

[0032] Figure 7 This is the third schematic diagram of the motion state of the switching unit of the present invention.

[0033] Figure 8 This is one of the three-dimensional structural schematic diagrams of the arm-removing mechanism of the present invention.

[0034] Figure 9 This is the second three-dimensional structural schematic diagram of the arm-removing mechanism of the present invention.

[0035] Figure 10 This is a three-dimensional structural diagram of the hand-removing mechanism of the present invention.

[0036] Figure 11 This is a schematic diagram of the grasping action of the hand-removing mechanism of the present invention.

[0037] Figure 12 This is a three-dimensional structural diagram of the hand-pressing table of the present invention.

[0038] Figure 13 This is a three-dimensional structural diagram of the arm-removing rotating plate of the present invention.

[0039] Figure 14 This is one of the three-dimensional structural schematic diagrams of the residual wire removal unit of the present invention (wire removal station).

[0040] Figure 15 This is the second three-dimensional structural schematic diagram of the residual line removal unit of the present invention (waiting station).

[0041] Figure 16 This is a right-side structural schematic diagram of the residual line removal unit of the present invention.

[0042] Figure 17 This is a three-dimensional structural diagram of the thread suction mechanism, thread pulling mechanism, thread hooking mechanism, and linkage mechanism of the present invention.

[0043] Figure 18 This is a top view of the thread suction mechanism, thread pulling mechanism, thread hooking mechanism, and linkage mechanism of the present invention.

[0044] Figure 19 This is a three-dimensional structural diagram of the wire-drawing mechanism and the linkage mechanism of the present invention.

[0045] Figure 20 This is a schematic diagram showing the positional relationship between the residual line removal unit and the replacement unit of the present invention.

[0046] Figure 21 This is a three-dimensional structural schematic diagram of the shifting mechanism of the present invention.

[0047] Figure 22 This is a three-dimensional structural diagram of the replacement unit, wire feeding unit, clutch winding unit, wire clamping unit, and cutting unit of the present invention.

[0048] Figure 23 This is a top view of the replacement unit, cable feeding unit, clutch winding unit, cable clamping unit, and cutting unit of the present invention.

[0049] Figure 24 This is a three-dimensional structural diagram of the wire-clamping unit of the present invention.

[0050] Figure 25 This is a top view of the wire-clamping unit of the present invention.

[0051] Figure 26 This is a three-dimensional structural diagram of the replacement unit and clutch winding unit of the present invention.

[0052] Figure 27This is a three-dimensional structural diagram of the double-seat shuttle bed of the present invention.

[0053] Figure 28 This is a three-dimensional structural diagram of the cable delivery unit of the present invention.

[0054] Figure 29 This is a three-dimensional structural diagram of the shearing unit of the present invention.

[0055] Figure 30 This is a top view of the shearing unit of the present invention.

[0056] Figure 31 This is one of the three-dimensional structural diagrams of the shearing frame and bottom shear of the present invention.

[0057] Figure 32 This is the second three-dimensional structural schematic diagram of the shearing frame and bottom shear of the present invention.

[0058] Figure 33 This is one of the schematic diagrams of the three-dimensional structure of the bobbin and bobbin case.

[0059] Figure 34 This is the second schematic diagram of the three-dimensional structure of the bobbin and bobbin case.

[0060] Figure 35 This is a top view schematic diagram of the movement trajectory of the wire-clamping hook of the wire-clamping unit of the present invention.

[0061] Figure 36 This is one of the schematic diagrams illustrating the working principle of the wire clamping unit of the present invention.

[0062] Figure 37 This is the second schematic diagram illustrating the working principle of the wire clamping unit of the present invention.

[0063] Figure 38 This is the third schematic diagram illustrating the working principle of the wire clamping unit of the present invention.

[0064] Figure 39 This is the fourth schematic diagram illustrating the working principle of the wire clamping unit of the present invention.

[0065] Figure 40 This is the fifth schematic diagram illustrating the working principle of the wire clamping unit of the present invention.

[0066] Figure 41 This is the sixth schematic diagram illustrating the working principle of the wire clamping unit of the present invention.

[0067] Figure 42 This is the seventh schematic diagram illustrating the working principle of the wire-clamping unit of the present invention.

[0068] Figure 43 This is the eighth schematic diagram illustrating the working principle of the wire clamping unit of the present invention.

[0069] Figure 44This is the ninth schematic diagram illustrating the working principle of the wire clamping unit of the present invention.

[0070] Figure 45 This is the tenth schematic diagram illustrating the working principle of the wire clamping unit of the present invention.

[0071] Figure 46 This is eleventh of the schematic diagrams illustrating the working principle of the wire clamping unit of the present invention.

[0072] Figure 47 This is a schematic diagram of the clutch winding unit of the present invention.

[0073] Figure label:

[0074] Replacement unit 1, handle removal mechanism 2, arm removal mechanism 3, wire feeding and winding unit 4, clutch winding unit 5, wire clamping unit 6, cutting unit 7, residual wire removal unit 8, rotary hook unit 9, needle plate 10;

[0075] Double shuttle bed 11, baffle 11-1, winding hole 11-2, pick-up and drop station 11.1, rotation station 11.2, positioning plate 12;

[0076] 21. Hand release pressure table, 21-1. Shuttle shell pressure plate, 21-2. Gap, 21-3. Sliding sleeve, 21-4. Limiting groove, 22. Hand release hook, 23. Hand release push rod frame, 24. Hand release connecting rod;

[0077] 31. Arm-removing plate, 31-1. Left guide shaft, 31-2. Right guide shaft, 31-3. Guide post, 31-3. Left guide plate, 32-1. Horizontal section of left guide groove, 32-1. Right guide plate, 33-1. Horizontal section of right guide groove, 33-2. Inclined section of right guide groove, 34-1. Driven pulley, 34-2. Timing belt, 34-3. Swing arm, 35. Slider, 36. Swing arm spring, 37. Buffer spring, 38. Limit nut, 39.

[0078] 41. Thread feeding needle; 42. Thread feeding slide; 43-1. Thread feeding screw; 43-2. ​​Thread feeding nut; 44. Lead coil;

[0079] 51. Top head; 52. Winding lifting frame; 53-1. Winding lifting screw; 53-2. Winding lifting nut; 54. Proximity switch; 55. Linear bearing;

[0080] 61. Wire clamping hook, 62. Wire clamping connecting plate, 62-1. 62-1. Wire clamping screw, 63-1. 63-2. Wire clamping nut, 64. Wire clamping swing arm, 64-1. 64-1. 65. Wire clamping slide, 65-1. 66. Wire clamping shaft;

[0081] Bottom line shear 71, first slide rail 7-1, second slide rail 7-2, first sliding shaft 71-1, second sliding shaft 71-2, bottom line clamp 72, shearing screw 73-1, shearing nut 73-2;

[0082] 8-1-1, 8-1-2, 8-1-3, 8-1-4, 8-1-5, 8-2, 8-2-1, 8-3, 8-4-1, 8-4-2, 8-4-21, 8-4-3, 8-4-4, 8-4-5, 8-5-3, 8-5-4, 8-5-5, 8-5-6, 8-5-7, 8-5-8; 8-5-8

[0083] A1, A3, A4, A5, A6, A7, A8, A8, A81, A82, A10, A11;

[0084] Hairpin B1, hairpin case B2, base plate B3, cover plate B4, hairpin skin B5, hook B6, first groove B7, second groove B8, thread hole B9, notch B10;

[0085] The following components are listed: a shifting motor C1, a release push rod C2, a release arm motor C3, a wire feeding motor C4, a wire laying motor C5, a winding rotation motor C6, a winding lifting motor C7, a sensor C8, a shearing motor C9, a wire clamping lifting motor C10, a wire clamping rotary motor C11, a shifting motor C12, a vacuum pump C13, a wire drawing motor C14, a hook push rod C15, and a linkage motor C16. Detailed Implementation

[0086] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0087] like Figure 1 As shown, the self-winding shuttle core replacement device includes a replacement unit 1, a pick-and-place unit (picking-and-place mechanism 2, picking-and-place mechanism 3), a wire feeding and laying unit 4, a clutch winding unit 5, a wire clamping unit 6, a cutting unit 7, a residual wire removal unit 8, a rotary hook unit 9, and a controller.

[0088] The embroidery machine frame (omitted in the figure) is fixed with a needle plate 10. The replacement unit, picking and changing unit, thread feeding unit, clutch winding unit, thread clamping unit, cutting unit, residual thread removal unit, and rotary hook unit are all located below the needle plate. The rotary hook unit is an existing structure. The replacement unit is used to load two bobbins and bobbin cases at the same time and can interchange their positions. The picking and changing unit is used to pick up and place bobbins and bobbin cases between the rotary hook unit and the replacement unit and to move bobbins and bobbin cases. The residual thread removal unit is used to remove residual bobbin thread from the bobbins and bobbin cases. The thread feeding unit is used to feed new bobbin thread into the bobbins and bobbin cases and drive the bobbin thread up and down during winding. The clutch winding unit is used to drive the bobbin to rotate so that the bobbin thread is wound around the bobbin. After the bobbin thread is wound, the cutting unit cuts and clamps the bobbin thread, and the thread clamping unit clamps the bobbin thread onto the bobbin case. The controller (omitted in the figure) is electrically connected to the rotary hook unit, replacement unit, picking and changing unit, thread feeding unit, clutch winding unit, thread clamping unit, cutting unit, and residual thread removal unit.

[0089] like Figure 33 , Figure 34 As shown, the bobbin and bobbin case include a bobbin case B2 with a bobbin B1. The bobbin is installed in the bobbin case, and the bobbin thread is wound around the bobbin. The top of the bobbin case is provided with a base plate B3, a cover plate B4, and a thread hook B6. Lifting the cover plate can move the base plate inward and hook the bobbin. The side of the bobbin case is provided with a notch B10, a bobbin skin B5, a first thread groove B7, and a second thread groove B8. The bobbin skin is provided with a thread hole B9, and the first thread groove, the second thread groove, and the thread hole are connected in sequence.

[0090] I. Replacement Unit

[0091] like Figure 26 As shown, the replacement unit includes a transposition frame A1, a double-seat shuttle bed 11, and a transposition motor C1. The transposition motor is fixed to the transposition frame, and its shaft is arranged vertically upwards. The double-seat shuttle bed is fixed to the top of the motor's shaft. The double-seat shuttle bed has two stations: a pick-and-place station 11.1 and a rotation station 11.2, which can respectively load two bobbins and bobbin cases. When the transposition motor drives the double-seat shuttle bed to rotate 180 degrees, the positions of the bobbins and bobbin cases at these two stations are interchanged.

[0092] like Figure 27As shown, the double-seat shuttle bed has two winding holes 11-2, located at the center of each station, to cooperate with the clutch winding unit to drive the bobbin to rotate for winding. Baffles 11-1 are provided on both sides of the double-seat shuttle bed. The baffles are curved and conform to the shape of the bobbin case. The baffles have expansion joints, thus providing elasticity to clamp the bobbin case and prevent it from falling off during bobbin rotation. Openings are provided between the baffles on both sides, located at both ends of the double-seat shuttle bed. The bobbin case with the bobbin can be inserted into the double-seat shuttle bed through the openings and fixed by the baffles, or removed from the double-seat shuttle bed through the openings. A positioning plate 12 is also provided above the rotating station to cooperate with the clutch winding unit and block the bobbin and bobbin case in the lower rotating station.

[0093] The process of replacing the unit is as follows:

[0094] 1. The pick-and-place station receives the bobbin case with an empty bobbin (without bottom thread) from the pick-and-place unit. At this time, the bobbin at the rotating station has already been wound with the bottom thread.

[0095] 2. The residual thread removal unit removes the residual thread from the bobbin case at the pick-and-place station;

[0096] 3. The shifting motor drives the double shuttle bed to rotate 180 degrees, and the positions of the shuttle core and shuttle case on the two stations are interchanged.

[0097] 4. The wire feeding unit, clutch winding unit, wire clamping unit, and cutting unit work together to load the bobbin into the bobbin at the rotating station, while the bobbin replacement unit removes the bobbin and bobbin case with the bobbin already wound with the bobbin from the pick-and-place station.

[0098] 5. Once the bobbin thread is used up, return to step 1.

[0099] II. Replacement Unit

[0100] The replacement unit includes a hand-removing mechanism and an arm-removing mechanism. Specifically: the hand-removing mechanism is used to remove and place the bobbin and bobbin case from the rotary shuttle unit and the replacement unit, including removing a bobbin case with a bobbin (with residual bobbin thread) from the rotary shuttle unit and placing it in the replacement unit, or removing a bobbin case with a bobbin (with bobbin thread wound) from the replacement unit and placing it in the rotary shuttle unit; the arm-removing mechanism is used to drive the hand-removing mechanism to move between the rotary shuttle unit and the replacement unit.

[0101] 1. Hand removal mechanism

[0102] like Figure 10 , Figure 11 , Figure 12As shown, the unhooking mechanism includes an unhooking platform 21, an unhooking hook 22, and an unhooking push rod C2. The unhooking hook is pivotally positioned on the unhooking platform, and the unhooking push rod is used to push the unhooking hook to swing. The unhooking push rod is an electric actuator, which is fixed to the unhooking platform via an unhooking push rod bracket 23. The unhooking push rod pushes the unhooking hook to swing via an unhooking connecting rod 24, and the two ends of the unhooking connecting rod are rotatably positioned on the telescopic rod of the unhooking push rod and the unhooking hook.

[0103] like Figure 12 As shown, the bottom surface of the hand-operated pressure table is provided with two shuttle shell pressure plates 21-1, and a certain gap 21-2 is maintained between the shuttle shell pressure plates 21-1. Figure 11 As shown, when the pick-up mechanism picks up the bobbin and bobbin case, the bobbin case pressure plate of the pick-up platform is located above the top surface of the bobbin case B2. The pick-up push rod extends, and the pick-up hook swings to hook the cover plate B4 of the bobbin case. The cover plate is raised upward (the gap ensures the cover plate's movement space) at a certain angle, and the bobbin case is blocked by the bobbin case pressure plate. At the same time, the cover plate drives the bottom plate B3 of the bobbin case to move, locking the bobbin B1 inside the bobbin case. The bobbin is fixed in the bobbin case, so the pick-up mechanism simultaneously grasps the bobbin and bobbin case. When the pick-up push rod retracts, the pick-up hook swings in the opposite direction, and the pick-up mechanism releases the bobbin and bobbin case.

[0104] 2. Disarm mechanism

[0105] like Figure 8 , Figure 9 As shown, the arm-removing mechanism includes an arm-removing frame A3, an arm-removing motor C3, a guide plate, an arm-removing rotating plate 31, and an arm-removing transmission assembly. The arm-removing hand press is connected to the arm-removing rotating plate. The arm-removing motor, guide plate, and arm-removing frame are fixed. The guide plate is provided with a guide groove, along which the arm-removing rotating plate can move. The arm-removing transmission assembly is used to transmit the power of the arm-removing motor to drive the arm-removing rotating plate, so that the arm-removing mechanism can remove and place the bobbin and bobbin case from the rotary hook unit and the replacement unit.

[0106] The guide plate includes a left guide plate 32 and a right guide plate 33, which are arranged in parallel and each has a guide groove. The left guide plate has a left guide groove, which includes a horizontal section 32-1. The right guide plate has a right guide groove, which includes a horizontal section 33-1 and an inclined section 33-2.

[0107] The arm-removing rotating plate is positioned between the left guide plate and the right guide plate, such as... Figure 10 As shown, the arm-removing plate is provided with guide shafts that slide with the guide grooves, including a left guide shaft 31-1 that mates with the left guide groove and a right guide shaft 31-2 that mates with the right guide groove. Both the left and right guide shafts are equipped with bearings.

[0108] like Figure 9As shown, the arm-lifting transmission assembly includes a transmission belt assembly (drive pulley 34-1, driven pulley 34-2, and synchronous belt 34-3), a swing arm 35, a slider 36, and a swing arm spring 37. The drive pulley and driven pulley are rotatably positioned on the arm-lifting frame. The drive pulley is coaxially connected to the arm-lifting motor shaft. The swing arm is fixed to the driven pulley shaft. The swing arm has an axially extending groove. The slider is rotatably positioned on the left guide shaft and can also be slidably positioned in the groove. When the swing arm rotates, the slider drives the guide shaft to slide along the guide groove, causing the arm-lifting plate to move. The two ends of the swing arm spring are connected to the swing arm and the arm-lifting frame respectively, assisting the swing arm movement.

[0109] The pick-up hand pressure table is connected to the pick-up arm rotating plate via a buffer mechanism. This mechanism provides a flexible docking action when picking up or placing the bobbin and bobbin case from the rotary hook unit (the buffer stroke coincides with the movement trajectory of the bobbin and bobbin case at this time), reducing impact. In the buffer mechanism, the pick-up arm rotating plate is equipped with a guide post 31-3, and the pick-up hand pressure table is equipped with a sliding sleeve 21-3 that cooperates with the guide post. A buffer spring 38 is mounted on the guide post to push the pick-up hand pressure table. The sliding sleeve has a limiting groove 21-4, and the guide post has a limiting nut 39 that passes through the limiting groove to control the sliding stroke.

[0110] When the take-off mechanism picks up and places the bobbin and bobbin case between the rotary hook unit and the replacement unit, the bobbin and bobbin case move along a curve. The working process of the take-off arm rotating plate is as follows:

[0111] 1) Transfer the bobbin and bobbin case from the rotary hook unit to the replacement unit;

[0112] a. such as Figure 5 As shown, the take-off arm rotating plate is in a horizontal position, and the take-off hand mechanism grabs the shuttle core and shuttle case;

[0113] b. Disconnect the arm and start the rotating board to begin movement. Figure 5 As indicated by the middle arrow, the left guide shaft moves horizontally along the horizontal section 32-1 of the left guide groove, and the right guide shaft moves horizontally along the horizontal section 33-1 of the right guide groove. Therefore, the arm-removing turntable moves horizontally. Figure 5 (The arrow pointing horizontally to the left) indicates that the disengagement mechanism horizontally removes the bobbin and bobbin case from the rotary hook unit; during this stage, the swing arm spring shortens to assist the swing arm movement;

[0114] c. The left guide shaft continues to move horizontally along the horizontal section 32-1 of the left guide groove, while the right guide shaft moves obliquely along the inclined section 33-2 of the right guide groove. Therefore, the arm-removing plate rotates while moving horizontally. Figure 6 (The arrow points clockwise), the bobbin and bob case descend along an arc; during this stage, the swing arm spring shortens to assist the swing arm movement;

[0115] d. For example Figure 7As shown, when the bobbin and bobbin case approach the double shuttle bed, the pick-up arm rotating plate is in a near-vertical position, pushing the bobbin and bobbin case horizontally from the opening position into the pick-up and put-out position of the double shuttle bed. The pick-up arm mechanism releases the bobbin and bobbin case. The bobbin and bobbin case then perform residual thread removal, repositioning, thread feeding, winding, thread clamping, thread cutting, and installation of the bottom thread.

[0116] 2) Transfer the bobbin and bobbin case from the replacement unit to the rotary hook unit.

[0117] In reverse operation, the bobbin and bobbin case with the bobbin thread already wound at the pick-and-place station are picked up, the unhooking mechanism grabs the bobbin and bobbin case, and the unhooking arm plate rotates first. Figure 7 (The arrow points in a counter-clockwise direction). After the bobbin and bobbin case are moved out of the pick-and-place station, they move along the arc to the highest point, and then the disassembly arm turntable moves horizontally. Figure 7 (Horizontal arrow pointing to the right) Insert the bobbin and bobbin case into the rotary hook unit, and the disengagement mechanism releases the bobbin and bobbin case; during this stage, the swing arm spring extends.

[0118] Since the bobbin and bobbin case on the double shuttle bed are already wound with the bobbin thread, after the unloading mechanism lowers the empty bobbin and bobbin case, the residual thread is cleared and the bobbin case is repositioned. Then, the bobbin and bobbin case with the bobbin thread wound can be grabbed immediately and loaded into the rotary shuttle unit, thus saving time and improving production efficiency.

[0119] III. Cable Delivery Unit

[0120] like Figure 28 As shown, the cable feeding unit includes a cable feeding frame A4, a tube frame A10, a cable feeding needle 41, a cable feeding slide 42, a pass coil 44, a cable feeding motor C4, a cable feeding transmission mechanism, and a cable laying motor C5.

[0121] The wire feeding coil is fixed to the wire feeding frame. The wire feeding carriage is horizontally slidably positioned on the wire feeding frame via a horizontal guide rail. The wire feeding motor is fixed to the wire feeding frame, and the wire feeding transmission mechanism is used to transmit the power of the wire feeding motor to drive the wire feeding carriage to slide horizontally. The tube rack is used to install the bottom wire tube A11.

[0122] The wire feeding transmission mechanism includes a wire feeding screw 43-1 and a wire feeding nut 43-2. ​​The wire feeding screw is rotatably positioned on the wire feeding frame and coaxially connected to the wire feeding motor shaft. The wire feeding nut meshes with the wire feeding screw and is fixed to the wire feeding slide.

[0123] The wire feeding motor is fixed to the wire feeding carriage. The wire feeding motor is an electric actuator with its telescopic shaft arranged vertically upwards. The tail of the wire feeding needle is fixed to the telescopic shaft of the wire feeding motor, and the head of the wire feeding needle points towards the double-seat shuttle bed. The wire feeding needle is parallel to the sliding axis of the wire feeding carriage.

[0124] The bottom thread tube A11, with the bottom thread wound around it, is inserted into the tube frame A10. The bottom thread from the bottom thread tube is fed into the bobbin and bobbin case by the thread feeding and laying unit. The bottom thread from the bottom thread tube first passes through the coil and then through the needle hole at the front of the thread feeding needle. When the thread feeding motor starts, it drives the thread feeding needle to move horizontally. The thread feeding needle inserts the bottom thread into the notch of the bobbin case. The clutch winding unit drives the bobbin to rotate so that the bottom thread is wound around the bobbin. At the same time, the laying motor starts and drives the thread feeding needle to move up and down back and forth so that the bottom thread is evenly wound around the bobbin.

[0125] The thread feed needle is a hollow tube. An air source (omitted in the figure) is connected to the thread feed needle through an air supply tube (omitted in the figure) to generate airflow at the front end of the thread feed needle. The air supply tube is connected to the tail end of the thread feed needle. The airflow first enters the tail end of the air supply tube and then is blown out through the front end of the thread feed needle, thereby blowing the bobbin thread passing through the thread feed needle forward. When the bobbin rotates, the bobbin thread can be more easily wound around the bobbin. Otherwise, if the bobbin thread on the thread feed needle hangs down, it will be difficult for the bobbin thread to be wound around the bobbin when it rotates.

[0126] IV. Clutch winding unit

[0127] like Figure 26 As shown, the clutch winding unit includes a winding frame A5, a top head 51, a winding lifting frame 52, a winding rotary motor C6, a winding lifting motor C7, a winding transmission mechanism, and a sensor C8. The winding lifting motor is fixed to the winding frame, and the winding transmission mechanism transmits power from the winding lifting motor to drive the winding lifting frame to move up and down. The winding rotary motor is fixed to the winding lifting frame and drives the top head to rotate. The shafts of the winding rotary motor and the winding lifting motor are arranged vertically upwards.

[0128] The winding transmission mechanism includes a winding lifting screw 53-1 and a winding lifting nut 53-2. The winding lifting frame is vertically and slidably positioned on the winding frame, the winding lifting screw is rotatably positioned on the winding frame and coaxially connected to the rotating shaft of the winding lifting motor, and the winding lifting nut meshes with the winding lifting screw and is fixed to the winding lifting frame.

[0129] The winding rotary motor is fixed to the winding lifting frame, and the mandrel is fixed to the top of the rotating shaft of the winding rotary motor. The mandrel is coaxially arranged with the winding hole of the double shuttle bed in the rotating station. The top surface of the mandrel has a protrusion, and the mandrel can move from bottom to top to insert into the center hole of the bobbin. The mandrel is a rubber mandrel.

[0130] The sensor is fixed to the wire feeding carriage. The sensor is a laser rangefinder. The rangefinder laser emitted by the sensor passes through the notch of the shuttle shell at the rotating station and shines on the bottom thread of the shuttle core to detect the thickness of the wound bottom thread.

[0131] The winding frame is also equipped with a proximity switch 54 and a linear bearing 55, which are used to limit the winding lifting frame and keep the winding lifting frame moving vertically.

[0132] like Figure 47 As shown, during winding: the winding lifting motor starts, driving the top head below the rotating station of the double shuttle bed to rise. Since the positioning plate 12 above the rotating station can block the bobbin and bobbin case, the top head passes through the winding hole and inserts into the center hole of the bobbin. The winding rotation motor starts, and the top head drives the bobbin to rotate through friction to wind the yarn. The sensor detects the thickness of the wound bottom line in real time. After winding is completed, the top head descends to the bottom of the double shuttle bed to avoid interference when the double shuttle bed rotates 180 degrees later.

[0133] V. Cable clamping unit

[0134] like Figure 24 , Figure 25 As shown, the wire clamping unit includes a wire clamping frame A6, a wire clamping hook 61, a wire clamping connecting plate 62, a wire clamping lifting motor C10, a wire clamping rotary motor C11, a wire clamping lifting transmission mechanism, and a wire clamping rotary transmission mechanism.

[0135] The wire clamping lifting motor is fixed to the wire clamping frame. The wire clamping connecting plate is vertically slidably positioned on the wire clamping frame via a vertical guide rail. The wire clamping rotary motor is fixed to the wire clamping connecting plate. The wire clamping hook is mounted on the wire clamping connecting plate. The wire clamping lifting transmission mechanism transmits the power of the wire clamping lifting motor to drive the wire clamping connecting plate to move up and down. The wire clamping rotary transmission mechanism transmits the power of the wire clamping rotary motor to drive the wire clamping hook to rotate.

[0136] The wire clamping lifting transmission mechanism includes a wire clamping screw 63-1 and a wire clamping nut 63-2. The wire clamping screw is rotatably positioned on the wire clamping frame and coaxially connected to the rotating shaft of the wire clamping lifting motor. The wire clamping nut meshes with the wire clamping screw and is fixed to the wire clamping connecting plate.

[0137] The wire clamping rotary transmission mechanism includes a rotary guide rail 62-1 on the wire clamping connecting plate, a wire clamping swing arm 64 driven by a wire clamping rotary motor, a wire clamping swing arm groove 64-1 on the wire clamping swing arm, a wire clamping slide 65 slidably positioned on the wire clamping connecting plate, a wire clamping slide groove 65-1 on the wire clamping slide, and a wire clamping shaft 66.

[0138] The wire-clamping shaft is slidably positioned within the rotary guide rail, the wire-clamping swing arm groove, and the wire-clamping carriage groove. The wire-clamping hook is axially slidably positioned on the wire-clamping carriage. The front end of the wire-clamping hook is a hook ring, and the rear end is rotatably positioned on the wire-clamping shaft via a bearing. The wire-clamping carriage has a sliding hole for the axial sliding of the wire-clamping hook. The hook ring is helical, but can also be other shapes.

[0139] The wire-clamping shaft passes through the wire-clamping swing arm groove, with its upper end extending into the wire-clamping carriage groove and its lower end extending into the rotary guide rail. Bearings are provided at the upper, middle, and lower ends of the wire-clamping shaft. The wire-clamping shaft is slidably positioned within the rotary guide rail, the wire-clamping swing arm groove, and the wire-clamping carriage groove via the bearings. The rear end of the wire-clamping hook is fixed to the outer ring of the bearing at the upper end of the wire-clamping shaft.

[0140] The sliding direction of the wire-clamping hook is perpendicular to the sliding direction of the wire-clamping slide, and the sliding direction of the wire-clamping slide is parallel to the sliding direction of the wire-feeding slide. The rotary guide rail is elliptical. The rotation axis of the wire-clamping swing arm is located at the center of the rotary guide rail.

[0141] When the wire clamping rotary motor starts, the wire clamping swing arm drives the wire clamping shaft to move along the rotary guide rail, which in turn drives the wire clamping hook to move. Figure 25 , Figure 35 The horizontal and vertical directions reciprocate simultaneously, causing the hook ring at the front end of the line hook to move along an elliptical track.

[0142] like Figures 35 to 46 As shown, when the clutch winding unit completes the winding of the bobbin's bottom thread, the wire clamping unit begins to work:

[0143] 1. For example Figure 36 As shown, the clutch winding unit has wound the bottom thread onto the bobbin, and the hook of the thread catch is located at point A;

[0144] 2. The shearing unit cuts the bottom line, and the cut bottom line is still held in place by the bottom line clamp;

[0145] 3. For example Figure 37 As shown, the wire-clamping rotary motor starts, driving the hook of the wire-clamping hook to move from point A to point B, and the hook catches the bottom line;

[0146] 4. The wire-clamping rotary motor starts, causing the hook of the wire-clamping hook to move from point B to point C, and then from point C to point D. Simultaneously, the wire-clamping lifting motor starts, causing the wire-clamping hook to descend. The hook pulls the bottom thread downwards, thus causing the bottom thread to slide along the gap between the bottom surface of the bobbin and the bobbin (e.g., ...). Figure 38 As shown), until the bottom line slides into the first groove (as shown). Figure 39 (as shown);

[0147] 5. For example Figure 40 As shown, the wire clamping lifting motor starts, driving the wire clamping hook to rise, and the bottom line moves to the top of the first wire groove;

[0148] 6. The cable clamping rotary motor starts, moving the hook of the cable clamping hook from point D to point A. Simultaneously, the cable clamping lifting motor starts, causing the cable clamping hook to rise first (e.g., ...). Figure 41 (As shown) it descends again, so the bottom line moves to the left side of the second groove (as shown). Figure 42 (as shown);

[0149] 7. The wire clamping lifting motor starts, causing the wire clamping hook to rise. Simultaneously, the wire clamping rotary motor starts, causing the hook's ring to retract a certain distance from point A to point D. Then, the wire clamping hook descends, and the bottom line moves to the wire hole (e.g., ...). Figure 43 (as shown);

[0150] 8. For example Figure 44 As shown, the wire clamping rotary motor starts, driving the hook of the wire clamping hook to move from point D to point A. At the same time, the wire clamping lifting motor starts, driving the wire clamping hook to first descend and then rise, with the bottom line passing under the hook.

[0151] 9. For example Figure 45 As shown, when the wire-clamping rotary motor starts, it drives the hook of the wire-clamping hook to move back and forth between point D and point A. At the same time, the wire-clamping rotary motor starts, driving the wire-clamping hook to move up and down, so that the hook catches the bottom line.

[0152] 10. For example Figure 46 As shown, the wire clamping is complete, and the bottom clamp is released.

[0153] VI. Shearing Unit

[0154] like Figure 29 , Figure 30 , Figure 31 , Figure 32 As shown, the shearing mechanism includes a shearing frame A7, a bobbin shear 71, a bobbin clamp 72, a shearing motor C9, and a shearing transmission mechanism. The shearing motor is fixed to the shearing frame, and the bobbin shear and bobbin clamp are mounted on the shearing frame. The bobbin shear is located between the thread feeding needle and the double-seat shuttle bed, and the bobbin clamp is located between the bobbin shear and the double-seat shuttle bed. The shearing transmission mechanism transmits the power of the shearing motor to drive the bobbin shear and bobbin clamp to open and close, thereby cutting and clamping the bobbin thread. The bobbin clamp consists of a pair of clamping arms used to clamp the cut bobbin thread.

[0155] The shearing transmission mechanism includes a shearing screw 73-1 rotatably positioned on the shearing frame and coaxially connected to the shearing motor shaft, a shearing nut 73-2 meshing with the shearing screw, a first slide rail 7-1 and two second slide rails 7-2 mounted on the shearing frame, a first sliding shaft 71-1 slidably positioned in the first slide rail and simultaneously connecting the shearing nut and the pin of the bottom thread cutter (the pin is the hinge shaft of the bottom thread cutter), and a second sliding shaft 71-2 slidably positioned in each of the second slide rails and fixed to the handle of the bottom thread cutter. Two clamping arms are respectively fixed to each of the second sliding shafts.

[0156] When the shearing motor rotates forward, the first sliding shaft pushes the bottom thread shears forward. As the distance between the two second sliding tracks changes (the distance is the same at the rear and gradually decreases at the front), the second sliding shafts gradually close together. Therefore, the bottom thread shears extend forward and close, cutting the bottom thread. Simultaneously, the bottom thread clamp also extends forward and closes, trapping the cut bottom thread. When the shearing motor rotates in reverse, the first sliding shaft pushes the bottom thread shears backward, and the second sliding shafts gradually separate. The bottom thread shears open and retract, and the bottom thread clamp also opens and retracts.

[0157] The working process of the wire feeding unit, clutch winding unit, wire clamping unit, and shearing unit is as follows:

[0158] The thread feeding motor starts, pushing the thread feeding carriage to move horizontally towards the double-seat shuttle bed. The thread feeding needle extends into the shuttle case of the rotating station (the outer wall of the shuttle case has a notch). The winding lifting motor starts, causing the top head to rise and insert into the center hole of the bobbin (the shuttle case is blocked by the positioning plate above and will not detach from the double-seat shuttle bed). The winding rotation motor starts, driving the bobbin to rotate, thereby attracting the thread end hanging on the thread feeding needle and winding the bobbin thread around the bobbin. The bobbin thread on the bobbin thread tube is continuously pulled out. At the same time, the thread laying motor starts, driving the thread feeding needle to move up and down back and forth to ensure that the bobbin thread is wound evenly. When the sensor detects that the bobbin thread thickness on the bobbin has reached the requirement, the winding stops, the thread feeding needle retracts from the bobbin and shuttle case, the shearing motor starts, the bobbin thread shears and bobbin thread clamp extend forward, the bobbin thread shears cuts the bobbin thread, the bobbin thread clamp clamps the bobbin thread, the thread clamp lifting motor and the thread clamp rotary motor wind the bobbin thread around the shuttle case through the thread clamp hook, and finally the top head descends, the bobbin thread shears and bobbin thread clamp retract, and the bobbin and shuttle case complete the winding.

[0159] VII. Residual Wire Clearing Unit

[0160] The residual thread removal unit is located on the side of the pick-and-place station of the double shuttle machine. When the thread in the bobbin and bobbin case is used up, there may still be residual thread. Therefore, after the replacement unit takes the bobbin and bobbin case out of the rotary hook unit and puts it into the replacement unit, the residual thread removal unit removes the residual thread in the bobbin and bobbin case and then installs new thread.

[0161] The residual thread removal unit includes a thread suction mechanism, a thread hooking mechanism, a thread pulling mechanism, a linkage mechanism, and a displacement mechanism.

[0162] The residual thread removal unit includes a waiting station and a thread cleaning station. The shifting mechanism moves the thread suction mechanism, thread hooking mechanism, thread pulling mechanism, and linkage mechanism between the waiting station and the thread cleaning station. The thread suction mechanism extracts residual thread from the bobbin and bobbin case at the pick-and-place station of the double-seat shuttle bed during the thread cleaning station. The thread hooking mechanism removes the thread from the thread suction mechanism during the waiting station. The thread pulling mechanism extracts the thread from the thread suction mechanism. The linkage mechanism enables the thread suction mechanism and the thread pulling mechanism to work together.

[0163] 1. Shifting mechanism

[0164] The shifting mechanism includes a residual wire removal frame A8, a shifting frame A81, a shifting motor C12, and a shifting transmission assembly.

[0165] The residual wire removal frame is fixed to the transposition frame. For example... Figure 21 As shown, the shifting frame is horizontally slidably positioned on the residual thread removal frame via the shifting guide rail 8-1-3 and the shifting slider 8-1-4. The thread suction mechanism, thread hooking mechanism, thread pulling mechanism, and linkage mechanism are arranged on the shifting frame. The shifting transmission assembly is used to transmit the power of the shifting motor to drive the shifting frame to move horizontally, so that the thread suction mechanism, thread hooking mechanism, thread pulling mechanism, and linkage mechanism move between the thread cleaning station and the waiting station.

[0166] When the shifting frame moves horizontally to one side, the residual wire removal unit is located at the wire cleaning station. Figure 14 When the shifting frame moves horizontally to the other side, the residual wire removal unit is located at the wire cleaning station. Figure 15 ).

[0167] The shifting transmission assembly includes a shifting screw 8-1-1 and a shifting nut 8-1-2. The shifting screw is rotatably positioned on the residual wire removal frame and coaxially connected to the shifting motor shaft. The shifting nut meshes with the shifting screw and is fixed to the shifting frame.

[0168] 2. Thread suction mechanism

[0169] The thread suction mechanism is used to remove residual thread from the bobbin case at the pick-and-place station. The mechanism includes a suction nozzle 8-2, a vacuum pump C13, and a pipe 8-2-1 connecting the nozzle and the vacuum pump. The pipe can be made of flexible tubing or rigid tubing, or it can be equipped with a rotary joint to ensure the nozzle can rotate. The suction nozzle is a curved tube and contains a filter screen; the sucked-out thread is blocked by the filter screen and thus remains in the nozzle. The vacuum pump is fixed to the transfer frame.

[0170] When removing residual thread, the residual thread removal unit moves to the thread cleaning station, the inlet of the suction nozzle is aligned with the notch B10 on the side of the shuttle case, and after removing the residual thread, the suction nozzle rotates at a certain angle (90 degrees), with the inlet of the suction nozzle positioned above the thread pulling drive wheel and the thread pulling driven wheel.

[0171] 3 hook line mechanism

[0172] After the suction mechanism removes the remaining bottom thread from the bobbin and bobbin case, the hooking mechanism hooks the bottom thread out of the suction nozzle. The hooking mechanism includes a hooking rod 8-3 and a hooking push rod C15. The hooking push rod is fixed to the shifting frame and drives the hooking rod to move up and down. A hook is located at the top of the hooking rod, which can hook out a portion of the bottom thread from the suction nozzle. The hooking push rod is an electric push rod.

[0173] 4-wire drawing mechanism

[0174] After the hooking mechanism hooks out the bottom line, the pulling mechanism completely pulls out the remaining bottom line from the suction nozzle. The pulling mechanism includes a connecting seat A82, a pulling drive wheel 8-4-1, a pulling driven wheel 8-4-2, a pulling motor C14, and a clamping assembly.

[0175] The connecting seat is fixed to the shifting frame.

[0176] The active and passive drawing wheels are rotatably positioned on the connecting seat. The rotation axes of the active and passive drawing wheels are parallel to each other. The drawing motor is fixed to the connecting seat to drive the active drawing wheel to rotate. The clamping assembly is used to apply thrust to bring the passive drawing wheel and the active drawing wheel closer together.

[0177] In the clamping assembly, the passive drawing wheel is rotatably positioned on the passive drawing wheel shaft 8-4-21. The connecting seat is provided with two clamping slide rails 8-4-3. Both ends of the passive drawing wheel shaft can slide along the clamping slide rails (the sliding direction is perpendicular to the rotation axis of the passive drawing wheel). The connecting seat is provided with a mounting groove 8-4-5. The clamping slide rails are set in the mounting grooves. Both ends of the passive drawing wheel shaft pass through the mounting grooves and extend out of the connecting seat. In addition, a clamping spring 8-4-4 installed on the clamping slide rails applies a thrust to the passive drawing wheel shaft, causing the passive drawing wheel to move closer to the active drawing wheel.

[0178] 5 linkage mechanisms

[0179] After the suction mechanism sucks out the remaining thread from the bobbin case, the linkage mechanism simultaneously drives the suction mechanism and the thread pulling mechanism to move together, so that the hooking mechanism hooks out the thread and the thread pulling mechanism completely pulls out the remaining thread from the suction nozzle.

[0180] The linkage mechanism includes a linkage component and a linkage motor C16. The linkage motor is fixed to the connecting seat A82. The linkage component is used to transmit the power of the linkage motor to drive the suction nozzle and the passive wheel for drawing the thread.

[0181] The linkage assembly includes a first linkage gear 8-5-3, a second linkage gear 8-5-4, a third linkage gear 8-5-5, a rack linkage 8-5-6, a linkage rod 8-5-7, and a swing arm linkage 8-5-8. The first linkage gear, the second linkage gear, and the third linkage gear are rotatably positioned on the connecting seat and mesh sequentially. The first linkage gear is coaxially connected to the shaft of the linkage motor.

[0182] The suction nozzle is positioned above the linkage second gear. One end of the pipe is connected to the vacuum pump, and the other end passes axially through the linkage second gear and connects to the suction nozzle. When the linkage second gear rotates, it drives the suction nozzle to rotate synchronously through the pipe.

[0183] The linkage rack is slidably positioned on the connecting seat and meshes with the linkage third gear. The middle part of the linkage swing arm is rotatably positioned on the connecting seat, and the two ends of the linkage rod are rotatably positioned on the linkage rack and the linkage swing arm, respectively. The linkage swing arm can push the shaft of the drawing passive wheel, so that the drawing passive wheel can be translated.

[0184] When the linkage motor starts, the first linkage gear, the second linkage gear, and the third linkage gear rotate in sequence. The second linkage gear drives the suction nozzle to rotate at a certain angle. Figures 14 to 15 Simultaneously, the linkage rod drives the linkage swing arm to rotate, and the linkage swing arm then pushes the shaft of the passive drawing wheel, causing the passive drawing wheel to slide. The active drawing wheel and the passive drawing wheel separate, at which point the hooking mechanism starts. The hooking rod rises first, passes upward between the active drawing wheel and the passive drawing wheel, and extends into the inlet of the suction nozzle. The hooking rod then descends to below the active drawing wheel and the passive drawing wheel, hooking out part of the bottom line in the suction nozzle. The linkage motor rotates in the opposite direction, and the suction nozzle rotates in the opposite direction at a certain angle. The active drawing wheel and the passive drawing wheel close together, clamping the bottom line hooked out by the hooking rod. The drawing motor starts, and the active drawing wheel and the passive drawing wheel rotate, completely pulling out the bottom line in the suction nozzle.

[0185] After the bobbin and bobbin case are removed from the rotary hook unit, the bobbin and bobbin case are placed into the replacement unit. At this point, the residual thread removal unit needs to remove any remaining thread from the bobbin and bobbin case before subsequent thread feeding, winding, laying, and cutting can proceed. The working steps of the residual thread removal unit are as follows:

[0186] 1) such as Figure 15 As shown, the residual wire removal unit is located at the waiting station;

[0187] 2) The replacement unit takes out the bobbin and bobbin case from the rotary shuttle unit and then puts the bobbin and bobbin case into the pick-and-place station of the double shuttle bed in the replacement unit.

[0188] 3) such as Figure 14 As shown, the shift motor starts, and the residual wire removal unit moves to the wire cleaning station;

[0189] 4) Align the suction tube with the notch on the bobbin case at the pick-and-place station.

[0190] 5) The vacuum pump starts, and the suction nozzle completely sucks out the remaining thread from the bobbin and bobbin case; using a vacuum pump can quickly suck out all the thread inside the bobbin and bobbin case, avoiding thread residue;

[0191] The replacement unit then performs the following steps: repositioning of the bobbin and bobbin case, thread feeding, winding, thread arrangement, and thread cutting.

[0192] 6) such as Figure 15 As shown, the shifting motor starts, and the residual thread removal unit moves to the waiting position; after the residual thread removal unit moves away, the replacement unit can load the bobbin and bobbin case with the bobbin thread installed into the rotary hook unit, reducing downtime;

[0193] 7) The linkage motor starts, the suction nozzle rotates 90 degrees (located above the active and passive drawing wheels), and the active and passive drawing wheels separate at the same time.

[0194] 8) The hook rod is activated, and the hook rod moves upward through the inlet of the suction nozzle between the active and passive drawing wheels. The hook rod then descends to below the active and passive drawing wheels, hooking out part of the bottom line from the suction nozzle.

[0195] 9) The linkage motor starts, the active wheel and the passive wheel close together and clamp the hooked bottom line, and the suction nozzle rotates 90 degrees in the opposite direction;

[0196] 10) The thread-pulling motor starts, and the thread-pulling drive wheel and the thread-pulling passive wheel rotate, completely pulling out the thread from the suction nozzle. The pulled-out thread falls into the collection box below.

[0197] VIII. Other Sections

[0198] The controller is electrically connected to the transposition motor, the hand release push rod, the arm release motor, the wire feeding motor, the wire laying motor, the winding rotation motor, the winding lifting motor, the wire clamping lifting motor, the wire clamping rotary motor, the shearing motor, the shifting motor, the vacuum pump, the wire drawing motor, the hook push rod, the linkage motor, and the sensor.

[0199] The tube rack, shifting frame, arm-removing frame, thread feeder, winding frame, thread clamping frame, cutting frame, and residual thread removal frame are fixed as a single unit and also fixed to the embroidery machine frame. Specifically, the arm-removing frame is fixed to the embroidery machine frame, the shifting frame is fixed to the arm-removing frame, the tube rack is fixed to the shifting frame, the thread feeder is fixed to the shifting frame, the cutting frame is fixed to the shifting frame, the winding frame is fixed to the shifting frame, the thread clamping frame is fixed to the shifting frame, and the residual thread removal frame is fixed to the shifting frame.

[0200] All components of this invention are existing technologies and can be purchased externally.

[0201] The working process of this invention is as follows:

[0202] 1. The embroidery machine uses the bobbin and bobbin case thread in the rotary shuttle unit to embroider until the bobbin and bobbin case thread is used up.

[0203] 2. The arm-removing mechanism drives the hand-removing mechanism to remove the bobbin and bobbin case from the rotary hook unit, and then transfers the bobbin and bobbin case to the pick-and-place station of the replacement unit.

[0204] 3. The residual thread removal unit moves to the thread cleaning station, sucks out the residual thread inside the bobbin and bobbin case, and then moves to the waiting station.

[0205] 4. The replacement unit swaps the positions of the bobbin and bobbin case at the pick-and-place station and the rotating station;

[0206] 5. The arm removal mechanism drives the hand removal mechanism to remove the bobbin and bobbin case from the pick-and-place station of the replacement unit, and then transfers the bobbin and bobbin case to the rotary hook unit. The needle of the embroidery machine descends and takes out the bobbin and bobbin case on the rotary hook unit for embroidery.

[0207] 6. The bobbin feeding unit feeds the bobbin thread into the shuttle case of the rotating station. The clutch winding unit drives the bobbin to rotate and wind the bobbin. After the bobbin is wound with the bobbin thread, the cutting unit cuts the bobbin thread. The clamping unit winds the bobbin thread onto the shuttle case. The bobbin on the rotating station is now fully loaded with bobbin thread.

[0208] 7. Repeat steps 1-6, cyclically replacing the bobbin and bobbin case, and keep the embroidery machine running.

[0209] The accompanying drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

Claims

1. A self-winding shuttle core replacement device, comprising a rotary shuttle unit (9); characterized in that: The device also includes a replacement unit (1) for swapping the two bobbins and bobbin cases, a bobbin and bobbin case removal unit, a residual thread removal unit (8) for removing residual thread from the bobbins and bobbin cases, a thread feeding unit (4) for feeding the thread into the bobbins and bobbin cases, a clutch winding unit (5) for rotating the bobbins, a thread clamping unit (6) for winding the thread onto the bobbin case, a cutting unit (7) for cutting the thread, and a controller. The replacement unit includes a shifting frame (A1), a double-seat shuttle bed (11) capable of loading two shuttle cores and shuttle cases, and a shifting motor (C1) for driving the double-seat shuttle bed to rotate; The pick-and-place unit includes a pick-and-place mechanism (2) for picking up and placing the bobbin and bobbin case, and a pick-and-place arm mechanism (3) for driving the pick-and-place mechanism to move between the rotary hook unit and the replacement unit; the pick-and-place mechanism includes a pick-and-place pressure table (21), a pick-and-place hook (22) that is swayably positioned on the pick-and-place pressure table, and a pick-and-place push rod (C2) that pushes the pick-and-place hook to move; the pick-and-place arm mechanism includes a pick-and-place arm frame (A3), a guide plate with a guide groove, a pick-and-place arm motor (C3), a pick-and-place arm rotating plate (31) that can move along the guide groove, and a pick-and-place arm transmission assembly that transmits the power of the pick-and-place arm motor to drive the pick-and-place arm rotating plate to move; the pick-and-place pressure table is connected to the pick-and-place arm rotating plate; The wire clamping unit includes a wire clamping frame (A6), a wire clamping hook (61), a wire clamping connecting plate (62), a wire clamping lifting motor (C10), a wire clamping rotary motor (C11) fixed to the wire clamping connecting plate, a wire clamping lifting transmission mechanism that transmits the power of the wire clamping lifting motor to drive the wire clamping connecting plate to move up and down, and a wire clamping rotary transmission mechanism that transmits the power of the wire clamping rotary motor to drive the wire clamping hook to rotate. The residual thread removal unit includes a thread suction mechanism for sucking out residual thread from the bobbin and bobbin case, a thread hooking mechanism for taking out the thread from the thread suction mechanism, a thread pulling mechanism for pulling out the thread from the thread suction mechanism, a linkage mechanism for cooperating with the thread suction mechanism and the thread pulling mechanism, and a displacement mechanism for driving the residual thread removal unit to move horizontally. The double-seat shuttle bed is equipped with a pick-and-place station (11.1) and a rotation station (11.2); the working process of the wire clamping unit is as follows: 1) The clutch winding unit has wound the bottom thread onto the bobbin, and the hook of the thread catch is located at point A; 2) The shearing unit cuts the bottom line, and the cut bottom line is still held in place by the bottom line clamp; 3) The wire clamping rotary motor starts, driving the hook of the wire clamping hook to move from point A to point B, and the hook catches the bottom line; 4) The wire clamping rotary motor starts, driving the hook ring of the wire clamping hook to move from point B to point C, and then from point C to point D. At the same time, the wire clamping lifting motor starts, driving the wire clamping hook to descend. The wire clamping hook drags the bottom line downwards, and the bottom line slides along the gap between the bottom surface of the bobbin and the bobbin until the bottom line slides into the first wire groove. 5) The wire clamping lifting motor starts, driving the wire clamping hook to rise, and the bottom line moves to the top of the first wire groove; 6) The wire clamping rotary motor starts, driving the hook ring of the wire clamping hook to move from point D to point A. At the same time, the wire clamping lifting motor starts, driving the wire clamping hook to rise and then fall, moving the bottom line to the left side of the second wire groove. 7) The wire clamping lifting motor starts, driving the wire clamping hook to rise. At the same time, the wire clamping rotary motor starts, driving the hook ring of the wire clamping hook to move back a certain distance from point A to point D, and then driving the wire clamping hook to descend, moving the bottom line to the wire hole. 8) The wire clamping rotary motor starts, which moves the hook of the wire clamping hook from point D to point A. At the same time, the wire clamping lifting motor starts, which moves the wire clamping hook down first and then up, so that the bottom line passes under the hook at the top of the shuttle case. 9) The wire-clamping rotary motor starts, causing the hook of the wire-clamping hook to move back and forth between point D and point A. At the same time, the wire-clamping rotary motor starts, causing the wire-clamping hook to move up and down, so that the hook at the top of the shuttle case catches the bottom line. 10) The wire clamping is complete; release the bottom clamp. The working process of the self-winding bobbin replacement device is as follows: 1) The embroidery machine uses the bobbin and bobbin case thread in the rotary shuttle unit to embroider until the bobbin and bobbin case thread is used up; 2) The arm-removing mechanism drives the hand-removing mechanism to remove the bobbin and bobbin case from the rotary hook unit, and then transfers the bobbin and bobbin case to the pick-and-place station of the replacement unit. 3) The residual thread removal unit moves to the thread cleaning station, sucks out the residual thread inside the bobbin and bobbin case, and then moves to the waiting station. 4) The replacement unit swaps the positions of the bobbin and bobbin case at the pick-and-place station and the rotating station; 5) The arm removal mechanism drives the hand removal mechanism to remove the bobbin and bobbin case from the rotating station of the replacement unit, and then transfers the bobbin and bobbin case to the rotary hook unit. The needle of the embroidery machine descends and takes out the bobbin and bobbin case on the rotary hook unit for embroidery. 6) The wire feeding unit feeds the bottom thread into the shuttle case at the pick-and-place station. The clutch winding unit drives the bobbin to rotate and wind the thread. After the bobbin is wound with the bottom thread, the cutting unit cuts the bottom thread. The wire clamping unit winds the bottom thread onto the shuttle case. The bobbin at the pick-and-place station completes the thread loading. 7) Repeat steps 1-6 to replace the bobbin and bobbin case in a cycle, and keep the embroidery machine running.

2. The self-winding bobbin replacement device according to claim 1, characterized in that: The cable feeding unit includes a cable feeding frame (A4), a cable feeding needle (41), a guide coil (44), a cable feeding slide (42) that can be horizontally slidably positioned on the cable feeding frame, a cable feeding motor (C4), a cable feeding transmission mechanism that transmits the power of the cable feeding motor to drive the movement of the cable feeding slide, a cable feeding motor (C5) that is fixed to the cable feeding slide and drives the cable feeding needle to move up and down, and a tube frame (A10) for inserting the bottom thread tube; the cable feeding needle is a hollow tube, and an air source is connected to the cable feeding needle through an air supply pipe to generate airflow at the front end of the cable feeding needle; The clutch winding unit includes a winding frame (A5), a top head (51), a winding lifting frame (52), a winding rotary motor (C6) that drives the top head to rotate and is fixed to the winding lifting frame, a winding lifting motor (C7), a winding transmission mechanism that transmits the power of the winding lifting motor to drive the winding lifting frame to move up and down, and a sensor (C8).

3. The self-winding bobbin replacement device according to claim 2, characterized in that: The shearing unit includes a shearing frame (A7), a bottom thread shear (71) and a bottom thread clamp (72) mounted on the shearing frame, a shearing motor (C9), and a shearing transmission mechanism that transmits the power of the shearing motor to drive the bottom thread shear and the bottom thread clamp to open and close.

4. The self-winding bobbin replacement device according to claim 3, characterized in that: Each workstation has a winding hole (11-2) on its bottom surface, and baffles (11-1) are provided on both sides of the double shuttle bed; the handle push rod is fixed to the handle press table through the handle push rod frame (23), and the handle connecting rod (24) is rotatably positioned between the telescopic rod of the handle push rod and the handle hook. The residual thread removal unit is located on the side of the double-seat shuttle bed; the residual thread removal unit has a waiting station and a thread cleaning station; the shifting mechanism includes a residual thread removal frame (A8), a shifting frame (A81) that can be horizontally slidably positioned on the residual thread removal frame, a shifting motor (C12), and a shifting transmission assembly; the thread suction mechanism includes a suction nozzle (8-2), a vacuum pump (C13), and a pipe (8-2-1); the thread hooking mechanism includes a thread hooking rod (8-3) and a thread hooking push rod (C15); the thread pulling mechanism includes a thread pulling drive wheel (8-4-1), a thread pulling driven wheel (8-4-2), a thread pulling motor (C14), and a clamping assembly; the linkage mechanism includes a linkage motor (C16) and a linkage assembly.

5. The self-winding bobbin replacement device according to claim 4, characterized in that: A buffer mechanism is provided between the hand-removing pressure plate and the arm-removing rotating plate; in the buffer mechanism, the arm-removing rotating plate is provided with a guide post (31-3), the hand-removing pressure plate is provided with a sliding sleeve (21-3) that cooperates with the guide post, the buffer spring (38) is set in the sliding sleeve to push the hand-removing pressure plate, the sliding sleeve has a limiting groove (21-4), and the limiting nut (39) passes through the limiting groove and is fixed with the guide post.

6. The self-winding bobbin replacement device according to claim 5, characterized in that: The guide plate includes a left guide plate (32) and a right guide plate (33) arranged in parallel and provided with guide grooves. The arm-removing rotating plate is movably positioned between the left guide plate and the right guide plate through a guide shaft that cooperates with the guide groove. The left guide plate and the right guide plate are respectively provided with a left guide groove and a right guide groove. The arm-removing plate is provided with a left guide shaft (31-1) that cooperates with the left guide groove and a right guide shaft (31-2) that cooperates with the right guide groove. The left guide groove includes a horizontal section (32-1) and the right guide groove includes a horizontal section (33-1) and an inclined section (33-2).

7. The self-winding bobbin replacement device according to claim 6, characterized in that: The arm-removing transmission assembly includes an active pulley (34-1) driven by an arm-removing motor, a passive pulley (34-2), a synchronous belt (34-3) connecting the active pulley and the passive pulley, a swing arm (35) fixed to the passive pulley and provided with a groove, a slider (36) that can slide along the groove and is rotatably positioned on the left guide shaft, and a swing arm spring (37) that assists the movement of the swing arm.

8. The self-winding bobbin replacement device according to claim 7, characterized in that: The shifting frame, arm removal frame, wire feeding frame, winding frame, wire clamping frame, cutting frame, residual wire removal frame, and tube frame are fixed as one unit and are also fixed to the embroidery machine frame.

9. The self-winding bobbin replacement device according to claim 8, characterized in that: The controller is electrically connected to the transposition motor, the handle push rod, the arm removal motor, the wire feeding motor, the wire laying motor, the winding rotation motor, the winding lifting motor, the wire clamping lifting motor, the wire clamping rotary motor, the shearing motor, the shifting motor, the vacuum pump, the wire drawing motor, the hook push rod, the linkage motor, and the sensor.

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