An automatic wire winding and bottom shuttle changing mechanism

Abstract

The present invention discloses an automatic winding and bobbin-changing mechanism, which comprises a mounting substrate, and the mounting substrate is provided with a winding and threading control device, a thread-hooking device, an automatic bobbin-changing device and a device for removing the remaining thread of the bobbin core. The winding and threading control device of the present invention can wind the thread on the bobbin core and automatically thread the thread end in place on the bobbin core sleeve. The thread-hooking device can automatically thread the thread end through the first lead hole on the bobbin core sleeve. The automatic bobbin-changing device removes the bobbin on the sewing machine and replaces the wound bobbin onto the sewing machine. The device for removing the remaining thread of the bobbin core removes the remaining thread from the removed bobbin, facilitating the next winding. The automatic winding and bobbin-changing mechanism realizes the full automation of bobbin taking, winding, threading and bobbin changing, improving the working efficiency of industrial sewing machines.

Description

Technical Field

[0001] The present invention relates to the field of industrial sewing machines, and more specifically to an automatic thread winding and bobbin changing mechanism for industrial sewing machines. Background Art

[0002] Patent Invention 201310616933.9 discloses a method for changing the bobbin of a sewing machine. The first bobbin case is taken out from the bobbin table of the sewing machine base, and a spare second bobbin case is installed into the bobbin table; the first bobbin core is taken out from the replaced first bobbin case, the connection line between the first bobbin case and the first bobbin core is pulled to the surplus thread clamping device and cut off, and the surplus thread on the first bobbin case is fixed by the surplus thread clamping device; the remaining bottom thread on the first bobbin core is removed and a new bottom thread is wound full, and the newly wound bottom thread is connected to the surplus thread on the first bobbin case; the first bobbin core is installed into the first bobbin case for standby. For the shuttle changing technical solution of this invention, the clamping arm first grabs the bobbin case from the bobbin table and places it on the turntable, and then grabs the spare bobbin case from the turntable and replaces it on the sewing machine, so the shuttle changing speed is slow; the bobbin winding mechanism is relatively complex, it is necessary to leave surplus thread on the bobbin case, and the thread end cannot be automatically installed on the bobbin case after the replaced bobbin core is wound. Summary of the Invention

[0003] In view of the above-mentioned current situation of the prior art, the present invention provides an automatic thread winding and bobbin changing mechanism for industrial sewing machines to improve the shuttle changing efficiency of industrial sewing machines.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: An automatic thread winding and bobbin changing mechanism includes a mounting substrate, and the mounting substrate is provided with a thread winding and threading control device, a thread hooking device, an automatic shuttle changing device, and a bobbin core surplus thread taking device; the thread winding and threading control device includes a rotatable thread winding drive shaft, an outer sleeve of the thread winding drive shaft is provided with a second mounting bearing, the second mounting bearing is sleeved with a threading control shaft that can rotate independently, and the threading control shaft is connected with a threading control piece; one end of the thread winding drive shaft is connected to a thread winding drive motor through a thread winding transmission component, and the other end is provided with a rotary drive plate for connecting a bobbin core positioning hole; the threading control shaft is connected to a threading control motor through a threading transmission component; the thread hooking device includes a thread hooking mounting bracket fixed on the mounting substrate, a thread hooking drive cylinder is fixed on the thread hooking mounting bracket, a piston rod of the thread hooking drive cylinder is connected with a thread hooking mounting seat, the thread hooking mounting seat has a thread hooking mounting cavity, a thread hooking rod is fixed at the axis of the thread hooking mounting cavity, a guiding shaft sleeve that can stretch in the thread hooking mounting cavity is sleeved outside the thread hooking rod, and the front end of the thread hooking rod has a thread hook that can extend out of the guiding shaft sleeve; the automatic shuttle changing device includes a rotatable shuttle changing drive shaft, a key shaft sleeve that can axially move is arranged on the shuttle changing drive shaft, and the key shaft sleeve has a first connecting arm and a second connecting arm extending towards both ends respectively; the outer ends of the first connecting arm and the second connecting arm are respectively connected with a bobbin core sleeve grabbing device; the mounting substrate is provided with a shuttle changing control motor for driving the shuttle changing drive shaft to rotate.

[0005] To optimize the above technical solutions, the present invention further includes the following improved technical solutions.

[0006] The above-mentioned thread threading control piece includes an arc plate body. One side of the arc plate body has a wire deflecting edge, and the other side has a wire winding control arc edge. A tangent positioning hole is formed on the outer end side of the wire winding control arc edge, and a receiving groove is formed between the wire deflecting edge and the tangent positioning hole.

[0007] The above-mentioned wire winding control arc edge smoothly transitions and extends from the bottom wire contact starting point to the tangent positioning hole. For any two adjacent points on the wire winding control arc edge, the distance from the point closer to the tangent positioning hole to the normal line is smaller than the distance from the point farther from the tangent positioning hole to the normal line.

[0008] The above-mentioned thread threading control motor is connected with a first thread threading control module for driving the thread threading control piece to rotate counterclockwise so that the wire deflecting edge pushes the bottom wire into the first gap, and a second thread threading control module for driving the thread threading control piece to rotate clockwise so that the wire winding control arc edge pushes the bottom wire to slide into the second lead hole along the second gap.

[0009] The above-mentioned rotation drive plate is connected with a first telescopic shaft. The first telescopic shaft is coaxially and slidably installed inside the winding drive shaft. The outer wall of the first telescopic shaft and the inner wall of the winding drive shaft have connection keys, and a first return spring is sleeved on the first telescopic shaft.

[0010] A second telescopic shaft is coaxially installed inside the above-mentioned first telescopic shaft. The front end of the second telescopic shaft has a connecting shaft portion for connecting the central through hole of the bobbin. The main body of the second telescopic shaft is slidably installed inside the first telescopic shaft. A second return spring is sleeved outside the main body of the second telescopic shaft.

[0011] The above-mentioned mounting substrate is provided with a first wire pressing mounting seat that can be lifted. The first wire pressing mounting seat is provided with a second wire pressing mounting seat that can move back and forth. The second wire pressing mounting seat is provided with a wire inlet pipe for inputting the bottom wire and a rotatable wire pressing wheel disc. The mounting substrate is provided with a lifting cylinder for driving the first wire pressing mounting seat to move up and down. The first wire pressing mounting seat is provided with a wire pressing drive cylinder for driving the second wire pressing mounting seat to move back and forth.

[0012] The above-mentioned shuttle changing drive shaft is fixedly connected with an axially moving substrate. An axially moving shuttle changing cylinder for driving the key shaft sleeve to axially slide is arranged between the axially moving substrate and the key shaft sleeve.

[0013] The above-mentioned shuttle changing control motor is connected with a first drive control module for driving the shuttle changing drive shaft to rotate to the first shuttle taking angle, a second drive control module for driving the shuttle changing drive shaft to rotate to the second shuttle taking angle, a third drive control module for driving the shuttle changing drive shaft to rotate 180 degrees, a fourth control module for driving the shuttle changing drive shaft to rotate to the remaining wire taking angle, and a fifth control module for driving the shuttle changing drive shaft to rotate to the third shuttle taking angle.

[0014] The above-mentioned core thread taking device includes a core thread taking mounting frame, and the core thread taking mounting frame is provided with a rotatable first rotating shaft and a second rotating shaft; one end of the first rotating shaft is connected with a first core thread taking gear, and the other end is connected with a first synchronous wheel driven by a core thread taking motor; one end of the second rotating shaft is fixedly connected with an extending bracket arranged vertically, and the end of the extending bracket is provided with a rotatable second core thread taking gear; the other end of the second rotating shaft is connected with a first transmission gear through a one-way bearing, and the first transmission gear meshes with a second transmission gear on the first rotating shaft.

[0015] Compared with the prior art, the winding and threading control device of the present invention can wind the thread on the bobbin core and automatically thread the thread end in place on the bobbin core sleeve. The thread hooking device can automatically thread the thread end through the first lead hole on the bobbin core sleeve. The automatic bobbin changing device removes the bottom bobbin on the sewing machine and replaces the wound bottom bobbin onto the sewing machine. The core thread taking device removes the redundant thread from the removed bottom bobbin, facilitating the next winding. This automatic winding and bottom bobbin changing mechanism realizes the full automation of bobbin taking, winding, threading, and bobbin changing, improving the working efficiency of industrial sewing machines. Brief Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the winding and threading control device.

[0017] Figure 2 is Figure 1 a three-dimensional structural schematic diagram of the first transfer air cylinder part in

[0018] Figure 3 is Figure 1 a three-dimensional structural schematic diagram of the winding drive shaft part in

[0019] Figure 4 is Figure 3 a sectional structural schematic diagram of

[0020] Figure 5 is Figure 1 a three-dimensional structural schematic diagram of the wire pressing wheel disc part in

[0021] Figure 6 is Figure 3 a three-dimensional structural schematic diagram of the threading control piece in

[0022] Figure 7 is a first threading state schematic diagram.

[0023] Figure 8 is a second threading state schematic diagram.

[0024] Figure 9 is a third threading state schematic diagram.

[0025] Figure 10 is a fourth threading state schematic diagram.

[0026] Figure 11 is Figure 1 Schematic three-dimensional structure diagram of the middle hook wire device.

[0027] Figure 12 is Figure 11 Schematic cross-sectional structure diagram of...

[0028] Figure 13 is the front view of the automatic wire winding and bobbin shuttle changing mechanism.

[0029] Figure 14 is Figure 13 Side view of the automatic shuttle changing device in...

[0030] Figure 15 is the structure schematic diagram of the bobbin case gripping device.

[0031] Figure 16 is the schematic three-dimensional structure diagram of the device for taking the remaining thread of the bobbin.

[0032] Figure 17 is Figure 16 Side view of...

[0033] Figure 18 is the schematic installation structure diagram of the thread supply device on the sewing machine.

[0034] Figure 19 is the schematic three-dimensional structure diagram of the thread supply device.

[0035] Figure 20 is the schematic internal structure diagram of the thread supply device. Detailed implementation manners

[0036] The following further describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0037] Figures 1 to 20 The structure schematic diagram of the present invention is shown as follows.

[0038] The reference numerals in the figures are as follows: mounting substrate 1, first mounting rod 12, first transfer air cylinder 13, transfer moving seat 14, second transfer air cylinder 15, second air blowing pipe 16, fixed knife 17, normal line 18, shuttle changing drive shaft 2, key shaft sleeve 21, first connecting arm 21a, second connecting arm 21b, shuttle changing control motor 22, axially moving substrate 23, axial shuttle changing air cylinder 24, grasping air cylinder 3, grasping claw 31, grasping bracket 32, claw bracket 33, claw return spring 34, bobbin core 35, bobbin core positioning hole 35a, bobbin core sleeve 36, first gap 361, second gap 362, second lead hole 363, cover plate 37, first lead hole 38, winding drive shaft 4, winding drive motor 41, rotary drive plate 42, first telescopic shaft 43, second telescopic shaft 44, first return spring 45, second return spring 46, thread threading control piece 5, wire deflecting edge 5a, winding control arc edge 5b, tangent positioning hole 5c, accommodation groove 5d, thread threading control shaft 51, thread threading control motor 52, thread hooking mounting bracket 6, thread hooking drive air cylinder 61, thread hooking mounting seat 62, thread hooking mounting cavity 63, thread hooking rod 64, guide shaft sleeve 65, guide surface 65a, third return spring 66, limiting rod 67, sliding groove 68, surplus thread taking mounting bracket 7, first air blowing pipe 7a, first rotating shaft 71, second rotating shaft 72, extending bracket 72a, fourth return spring 72b, first surplus thread taking gear 73, surplus thread taking motor 74, first synchronous pulley 75, second surplus thread taking gear 76, first transmission gear 77, second transmission gear 78, first air suction pipe 79, thread supply mounting seat 8, thread tension control rod 81, thread tension control motor 82, thread supporting rod 83, thread passing hole 84, control rod drive gear 85, wire clamp 86, length measuring turntable 87, Hall sensor 88, wire delivery pipe 89, first wire pressing mounting seat 9, second wire pressing mounting seat 91, wire pressing wheel disc 92, lifting air cylinder 93, wire inlet pipe 94, wire pressing drive air cylinder 95.

[0039] The automatic winding and bottom shuttle changing mechanism of the present invention comprises a thread supply device, a winding and thread threading control device, a thread hooking device, an automatic shuttle changing device and a surplus thread taking device for the bobbin core. The thread supply device supplies the bottom thread to the automatic winding and bottom shuttle changing mechanism, measures the length of the bottom thread conveyed, and can control the conveying tension of the bottom thread, and cooperates to perform a wire pulling action when the bottom thread passes through the bobbin core sleeve 36. The winding and thread threading control device can wind the thread on the bobbin core 35 and automatically thread the thread end in place on the bobbin core sleeve 36. The thread hooking device can pass the thread end through the first lead hole 38 on the bobbin core sleeve 36. The automatic shuttle changing device removes the bottom shuttle on the sewing machine and replaces the wound bottom shuttle onto the sewing machine. The surplus thread taking device for the bobbin core removes the surplus thread from the removed bottom shuttle to facilitate the next winding.

[0040] As Figures 18 to 20The shown thread supply device includes a thread supply mounting base 8 installed on the sewing machine frame. The thread supply mounting base 8 is provided with a thread tension control rod 81 for toggling the bobbin thread, and a thread tension control motor 82 for driving the thread tension control rod 81 to work. On both sides of the thread tension control rod 81, there are stay wire rods 83 fixedly connected to the thread supply mounting base 8, and through holes 84 are formed at the ends of the stay wire rods 83.

[0041] A control rod driving gear 85 is provided at the rotating part of the thread tension control rod 81, and the control rod driving gear 85 is rotatably connected to the thread supply mounting base 8. The thread tension control motor 82 is engaged with the control rod driving gear 85 through a transmission gear, and can drive the thread tension control rod 81 to swing so as to pull the bobbin thread.

[0042] The thread supply mounting base 8 is provided with at least one thread clamp 86. After passing through the thread clamp 86, the bobbin thread is wound around the length measuring turntable 87. The thread supply mounting base 8 is provided with a Hall sensor 88 for detecting the rotation signal of the length measuring turntable 87.

[0043] The bobbin thread passes through the thread clamp 86 from the thread rack and is wound around the length measuring turntable 87. When the bobbin thread is input, the length measuring turntable 87 will rotate accordingly. A magnet coupled with the Hall sensor 88 is installed on the rotating shaft of the length measuring turntable 87. The control system can detect a signal every time the length measuring turntable 87 rotates one circle. When the length measuring turntable 87 rotates to the set number of circles, that is, when the corresponding length of the bobbin thread is wound on the bobbin 35, the system stops winding the thread on the bobbin 35 and performs the next action of threading the thread end through the bobbin sleeve 36.

[0044] After passing through the length measuring turntable 87, the bobbin thread passes through the through hole 84 on the stay wire rod 83 and the small hole on the thread tension control rod 81, and finally enters the thread delivery pipe 89. The thread delivery pipe 89 is a thread delivery pipeline connecting the winding and threading control device. The thread delivery pipe 89 has a tee joint. By blowing air through the third interface to the winding and threading control device, the bobbin thread can be automatically sent to the winding and threading control device under the drive of the air flow. The thread tension control motor 82 can drive the thread tension control rod 81 to swing through the transmission gear and the control rod driving gear 85, and the bobbin thread can be tightened when passing through the second lead hole 363 of the bobbin sleeve 36 to ensure smooth threading.

[0045] As Figures 3 to 6 The shown winding and threading control device, the mounting substrate 1 is provided with a rotatable winding drive shaft 4 through the first mounting bearing 13. A second mounting bearing 41 is sleeved outside the winding drive shaft 4, and a threading control shaft 51 capable of independent rotation is sleeved on the second mounting bearing 41. The threading control shaft 51 is connected with a threading control piece 5. One end of the winding drive shaft 4 is connected to the winding drive motor 41 through a winding transmission component, and the other end is provided with a rotary drive plate 42 for connecting to the bobbin positioning hole 35a.

[0046] The thread threading control shaft 51 is connected to the thread threading control motor 52 through a thread threading transmission assembly. In this embodiment, the thread threading transmission assembly is a synchronous belt transmission structure, and other known rotary transmission structures can also be used for the thread threading transmission assembly.

[0047] The rotary drive plate 42 is connected with a first telescopic shaft 43. The first telescopic shaft 43 is coaxially and slidably installed inside the winding drive shaft 4. There are connection keys between the outer wall of the first telescopic shaft 43 and the inner wall of the winding drive shaft 4. A first return spring 45 is sleeved on the first telescopic shaft 43.

[0048] A second telescopic shaft 44 is coaxially installed inside the first telescopic shaft 43. The front end of the second telescopic shaft 44 has a connection shaft portion for penetrating into the central through hole of the bobbin 35. The main body of the second telescopic shaft 44 is slidably installed inside the first telescopic shaft 43. A second return spring 46 is sleeved on the outside of the main body of the second telescopic shaft 44.

[0049] The side wall of the bobbin 35 has bobbin positioning holes 35a. The number of the bobbin positioning holes 35a can be two, three or four. The mating surface of the rotary drive plate 42 has a convex body that can be snapped into the bobbin positioning holes 35a. After the bobbin 35 is placed on the second telescopic shaft 44, the winding drive motor 41 drives the winding drive shaft 4 to rotate through a winding synchronous belt. The winding drive shaft 4 drives the first telescopic shaft 43 and the rotary drive plate 42 to rotate through the connection keys, so that the bobbin 35 rotates together to wind the bottom thread.

[0050] The rotary drive plate 42 is movably connected to the winding drive shaft 4 through the first telescopic shaft 43, which can avoid the axial impact on the rotary drive plate 42 when placing or removing the bobbin 35. When the rotary drive plate 42 is impacted, it has an axial movement margin with the telescopic movement of the first telescopic shaft 43. At the same time, the first return spring 45 keeps the first telescopic shaft 43 in the extended working state.

[0051] The mounting substrate 1 is provided with a first wire pressing mounting seat 9 that can be lifted and lowered. The first wire pressing mounting seat 9 is provided with a second wire pressing mounting seat 91 that can move back and forth. The second wire pressing mounting seat 91 is provided with a wire inlet pipe 94 for inputting the bottom thread and a rotatable wire pressing wheel disc 92. The mounting substrate 1 is provided with a lifting cylinder 93 for driving the first wire pressing mounting seat 9 to move up and down. The first wire pressing mounting seat 9 is provided with a wire pressing drive cylinder 95 for driving the second wire pressing mounting seat 91 to move back and forth.

[0052] After the bobbin 35 is placed on the second telescopic shaft 44, the lifting cylinder 93 drives the first wire pressing mounting base 9 to descend, aligning the wire pressing wheel disc 92 with the bobbin 35. At this time, the end of the bottom thread input from the wire supply device passes through the wire inlet pipe 94 and is exactly located between the bobbin 35 and the wire pressing wheel disc 92. The wire pressing driving cylinder 95 drives the wire pressing wheel disc 92 to approach the bobbin 35, and finally presses and fixes the end of the thread on the outer wall of the bobbin 35. The winding driving motor 41 first drives the rotary driving plate 42, the bobbin 35 and the wire pressing wheel disc 92 to rotate slowly together for several circles, so that the bottom thread is wound around the winding shaft of the bobbin 35. Subsequently, the winding driving motor 41 rotates at high speed until a set length of bottom thread is wound on the bobbin 35.

[0053] After the bottom thread is wound on the bobbin 35, the wire pressing wheel disc 92 gives way, and the bobbin sleeve 36 is sleeved on the bobbin 35. It is also necessary to insert the end of the bottom thread into the first gap 361 of the bobbin sleeve 36, pass through the second gap 362 and penetrate into the second lead hole 363, and finally pass the end of the thread through the first lead hole 38. The present invention realizes the automatic threading of the bottom thread on the first gap 361, the second gap 362 and the second lead hole 363 by using the threading control piece 5.

[0054] The threading control piece 5 includes an arc plate body, and the radian of the arc plate body is consistent with the radian of the threading control shaft 51 to which it is fixed. On one side of the plate body, there is a wire deflecting edge 5a, and on the other side, there is a winding control arc edge 5b. A tangent positioning hole 5c is formed on the outer end side of the winding control arc edge 5b, and a receiving groove 5d is formed between the wire deflecting edge 5a and the tangent positioning hole 5c.

[0055] In order to smoothly push the bottom thread into the second lead hole 363 along the second gap 362, the winding control arc edge 5b extends smoothly from the starting point of contact with the bottom thread to the tangent positioning hole 5c. A normal line 18 passing through the tangent positioning hole 5c is made perpendicular to the mounting substrate 1. For any two adjacent points on the winding control arc edge 5b, the distance from the point closer to the tangent positioning hole 5c to the normal line 18 is smaller than the distance from the point farther from the tangent positioning hole 5c to the normal line 18.

[0056] As Figure 7 shown, after the bobbin 35 finishes winding the thread, the bottom thread on the bobbin 35 is straightened between the wire inlet pipes 94. At this time, the threading control motor 52 controls the threading control piece 5 to rotate counterclockwise. After the wire deflecting edge 5a contacts the straightened bottom thread, it drives the bottom thread to be caught in the first gap 361.

[0057] As Figure 8 shown, the bottom thread is caught in the first gap 361. The threading control motor 52 controls the threading control piece 5 to rotate clockwise. The winding control arc edge 5b contacts the bottom thread caught in the first gap 361 and pushes the bottom thread into the second gap 362 through the winding control arc edge 5b.

[0058] As Figure 9As shown, after the bottom thread is pushed into the end of the second gap 362 by the winding control arc edge 5b of the bottom line, the threading control motor 52 controls the threading control piece 5 to rotate counterclockwise by an angle. At the same time, the thread tension control rod 81 tightens the bottom thread, and the bottom thread completely falls into the second lead hole 363.

[0059] As Figure 10 shown, the threading control motor 52 controls the threading control piece 5 to continue rotating clockwise. The bottom thread falls into the tangent positioning hole 5c of the threading control piece 5. When the accommodation groove 5d rotates to the first lead hole 38, the threading control piece 5 stops and waits for the thread hooking device to hook the bottom thread and pass the bottom thread through the first lead hole 38. Subsequently, the threading control piece 5 continues to rotate clockwise, and the bottom thread at the tangent positioning hole 5c contacts the fixed knife 17 to cut off the bottom thread.

[0060] The thread hooking device includes a thread hooking mounting bracket 6 fixed on the mounting substrate 1. A thread hooking driving cylinder 61 is fixed on the thread hooking mounting bracket 6. The piston rod of the thread hooking driving cylinder 61 is connected with a thread hooking mounting seat 62. The thread hooking mounting seat 62 has a thread hooking mounting cavity 63. A thread hooking rod 64 is fixed at the axis of the thread hooking mounting cavity 63. A guiding shaft sleeve 65 capable of telescoping in the thread hooking mounting cavity 63 is sleeved outside the thread hooking rod 64. The front end of the thread hooking rod 64 has a thread hook capable of protruding out of the guiding shaft sleeve 65.

[0061] The front end of the guiding shaft sleeve 65 has an inward concave guiding surface 65a. When not hooking the thread, the front end of the thread hooking rod �4 is located inside the guiding shaft sleeve 65. Since the aperture of the first lead hole 38 is small and the thread hooking rod {64} also has a certain length, the front end of the thread hooking rod 64 may have an offset and cannot accurately penetrate into the first lead hole 38. Therefore, in this technical solution, a movable guiding shaft sleeve 65 is arranged outside the thread hooking rod 64.

[0062] When the thread hooking driving cylinder 61 drives the thread hooking mounting seat 62 to move forward, the guiding shaft sleeve 65 first contacts the first lead hole 38. The guiding surface 65a of the guiding shaft sleeve 65 can guide the front end of the thread hooking rod 64 to automatically align with the first lead hole 38 to ensure smooth threading.

[0063] A third return spring 66 is arranged in the thread hooking mounting cavity 63. The third return spring 66 is connected with the inner end of the guiding shaft sleeve 65. The third return spring 66 applies an elastic force to the guiding shaft sleeve 65 to keep the guiding shaft sleeve 65 in an extended state.

[0064] The guiding shaft sleeve 65 has a limiting rod 67 for restricting rotation. The thread hooking mounting seat 62 has a sliding groove 68 cooperating with the limiting rod 67, which can prevent the guiding shaft sleeve 65 from rotating.

[0065] The mounting substrate 1 is provided with a first mounting rod 12 at the first shuttle-taking position, and the winding and threading control device is located on one side of the first mounting rod 12. The mounting substrate 1 is provided with a first transfer cylinder 13, and the piston rod of the first transfer cylinder 13 is connected with a transfer moving seat 14 that can move between the first mounting rod 12 and the winding and threading control device. The transfer moving seat 14 is provided with a bobbin sleeve gripping device and a second transfer cylinder 15 for driving the bobbin sleeve gripping device to move back and forth.

[0066] The bobbin sleeve gripping device includes a gripping cylinder 3 and gripping claws 31. The gripping cylinder 3 is fixed on a gripping bracket 32, and the gripping claws 31 are rotatably mounted on a claw bracket 33. The piston rod of the gripping cylinder 3 cooperates with the tail of the gripping claws 31, and the front part of the gripping claws 31 has a tip that can grab the cover plate 37 of the bobbin sleeve 36. A claw return spring 34 for driving the gripping claws 31 to rotate and reset is provided on the rotating shaft of the claw bracket 33. For the bobbin sleeve gripping device on the transfer moving seat 14, the gripping claws 31 can only open half of the stroke of the cover plate 37, which is convenient for taking out the bobbin 35 in the subsequent process.

[0067] The bobbin 35 and the bobbin sleeve 36 that have used up the bobbin thread are placed on the first mounting rod 12 by the automatic shuttle-changing device. The first transfer cylinder 13 and the second transfer cylinder 15 work together to move the bobbin sleeve gripping device to the first mounting rod 12, grab the bobbin sleeve 36 and the bobbin 35, and then move to the second telescopic shaft 44 of the winding and threading control device. For the bobbin sleeve gripping device connected to the second transfer cylinder 15, its gripping claws 31 can only open half of the stroke of the cover plate 37 on the bobbin sleeve 36. Therefore, the bobbin sleeve gripping device can grab the bobbin sleeve 36 and separate the bobbin 35. The second blow pipe 16 is used to blow air to blow the bobbin 35 out of the bobbin sleeve 36, so that the bobbin 35 falls onto the second telescopic shaft 44. Subsequently, the bobbin sleeve gripping device grabs the bobbin sleeve 36 and gives way, and the wire pressing wheel disc 92 descends to press the bobbin 35 to start winding the thread.

[0068] After the bobbin 35 winds the bobbin thread on the second telescopic shaft 44, the wire pressing wheel disc 92 gives way. The bobbin sleeve gripping device and the bobbin sleeve 36 move to the position of the bobbin 35. The shaft in the middle of the bobbin sleeve 36 is inserted into the hole in the middle of the bobbin 35, and the second telescopic shaft 44 retracts into the winding drive shaft 4. The winding and threading control device has a third blow pipe opposite to the second blow pipe 16, and the third blow pipe can also blow the bobbin 35 from the second telescopic shaft 44 into the bobbin sleeve 36. Subsequently, the bobbin sleeve gripping device places the bobbin 35 and the bobbin sleeve 36 wound with the bobbin thread as a whole on the first mounting rod 12 for standby.

[0069] As Figures 13 to 15As shown in the figure, the automatic shuttle changing device includes a mounting substrate 1, and a rotatable shuttle changing drive shaft 2 is provided on the mounting substrate 1. An axially movable key shaft sleeve 21 is provided on the shuttle changing drive shaft 2, and the key shaft sleeve 21 has a first connecting arm 21a and a second connecting arm 21b extending towards both ends respectively. The outer ends of the first connecting arm 21a and the second connecting arm 21b are respectively connected with a bobbin core sleeve grasping device. The mounting substrate 1 is provided with a shuttle changing control motor 22 for driving the shuttle changing drive shaft 2 to rotate.

[0070] An axially moving substrate 23 is fixedly connected to the shuttle changing drive shaft 2, and an axially moving shuttle changing cylinder 24 for driving the key shaft sleeve 21 to axially slide is provided between the axially moving substrate 23 and the key shaft sleeve 21. The axially moving shuttle changing cylinder 24 can push the key shaft sleeve 21 and the two bobbin core sleeve grasping devices thereon to move back and forth. The key shaft sleeve 21 is connected to the shuttle changing drive shaft 2 through a key shaft, so it can rotate with the shuttle changing drive shaft 2 while moving back and forth axially.

[0071] The shuttle changing control motor 22 is connected with a first drive control module for driving the shuttle changing drive shaft 2 to rotate to the first bobbin picking angle, a second drive control module for driving the shuttle changing drive shaft 2 to rotate to the second bobbin picking angle, a third drive control module for driving the shuttle changing drive shaft 2 to rotate 180 degrees, a fourth control module for driving the shuttle changing drive shaft 2 to rotate to the remaining thread angle, and a fifth control module for driving the shuttle changing drive shaft 2 to rotate to the third bobbin picking angle.

[0072] When the control system executes the first drive control module, the shuttle changing drive shaft 2 rotates to the first bobbin picking angle. At this time, the bobbin core sleeve grasping device on the second connecting arm 21b is located at the first mounting rod 12, and the bobbin core sleeve grasping device on the second connecting arm 21b grasps the bobbin core 35 with the bottom thread wound and the bobbin core sleeve 36.

[0073] Subsequently, the control system executes the second drive control module, and the shuttle changing drive shaft 2 rotates to the second bobbin picking angle. At this time, the second connecting arm 21b and the bobbin core 35 with the bottom thread wound and the bobbin core sleeve 36 rotate to the lowest position, and the bobbin core sleeve grasping device of the first connecting arm 21a is located outside the sewing machine shuttle box; when the bottom thread in the sewing machine shuttle box is used up, the bobbin core sleeve grasping device of the first connecting arm 21a grabs the bobbin core 35 and the bobbin core sleeve 36 in the shuttle box.

[0074] The control system executes the third drive control module, and the shuttle changing drive shaft 2 rotates 180 degrees. The first connecting arm 21a and the second connecting arm 21b exchange positions, and the bobbin core sleeve grasping device on the second connecting arm 21b puts the bobbin core 35 with the bottom thread wound and the bobbin core sleeve 36 into the sewing machine shuttle box; the used-up bobbin core 35 and the bobbin core sleeve 36 rotate to the lowest position with the first connecting arm 21a.

[0075] The control system executes the fourth drive control module, and the shuttle-changing drive shaft 2 rotates to the remainder line angle. The bobbin core sleeve grasping device of the first connecting arm 21a moves the bobbin core 35 and the bobbin core sleeve 36 above the bobbin core remainder-taking device, and the remainder of the bobbin core 35 is sucked away by the bobbin core remainder-taking device.

[0076] The control system executes the fourth drive control module, and the shuttle-changing drive shaft 2 rotates to the third bobbin-taking angle. At this time, the first connecting arm 21a grabs the bobbin core 35 and the bobbin core sleeve 36 that have taken the remainder and moves them to the first mounting rod 12, and places the empty-thread bobbin core 35 and the bobbin core sleeve 36 on the first mounting rod 12.

[0077] The empty-thread bobbin core 35 and the bobbin core sleeve 36 are then moved to the winding and threading control device by the bobbin core sleeve grasping device on the second transfer cylinder 15 for winding and threading operations. The wound bobbin core 35 and the bobbin core sleeve 36 are moved to the first mounting rod 12 by the bobbin core sleeve grasping device on the second transfer cylinder 15 again. Subsequently, the automatic shuttle-changing device circulates and executes the above-mentioned shuttle-changing steps.

[0078] As Figure 16 and Figure 17 The bobbin core remainder-taking device shown in the figure includes a remainder-taking mounting frame 7. The remainder-taking mounting frame 7 is provided with a rotatable first rotating shaft 71 and a second rotating shaft 72. One end of the first rotating shaft 71 is connected with a first remainder-taking gear 73, and the other end is connected with a first synchronous wheel 75 driven by a remainder-taking motor 74. One end of the second rotating shaft 72 is fixedly connected with a vertically arranged extension bracket 72a, and the end of the extension bracket 72a is provided with a rotatable second remainder-taking gear 76. The other end of the second rotating shaft 72 is connected with a first transmission gear 77 through a one-way bearing, and the first transmission gear 77 meshes with a second transmission gear 78 on the first rotating shaft 71.

[0079] A fourth return spring 72b is sleeved on the second rotating shaft 72. Under the spring force of the fourth return spring 72b, the second rotating shaft 72 has a tendency to make the second remainder-taking gear 76 approach the first remainder-taking gear 73.

[0080] Before taking the remainder, the first remainder-taking gear 73 and the second remainder-taking gear 76 are in a separated state. One side of the remainder-taking mounting frame 7 is provided with a first air blowing pipe 7a for blowing the remainder line between the first remainder-taking gear 73 and the second remainder-taking gear 76. After the remainder line is blown between the first remainder-taking gear 73 and the second remainder-taking gear 76, the remainder-taking motor 74 starts to operate. The second transmission gear 78 drives the first transmission gear 77 to rotate. Since the first transmission gear 77 is connected to the second rotating shaft 72 through a one-way bearing, at this time, the first transmission gear 77 idles relative to the second rotating shaft 72. Under the spring force of the fourth return spring 72b, the second rotating shaft 72 makes the second remainder-taking gear 76 approach the first remainder-taking gear 73 until the two are engaged.

[0081] The remainder line motor 74 continues to rotate, and the first remainder line gear 73 meshes with the second remainder line gear 76 to rotate together, pulling out all the remainder lines on the bobbin 35.

[0082] A first suction pipe 79 is provided below the first remainder line gear 73. The first suction pipe 79 sucks in the remainder lines removed from the bobbin 35 and finally stores them in the waste line collection area.

[0083] After taking out the remainder lines, the remainder line motor 74 rotates in the reverse direction. The second transmission gear 78 drives the first transmission gear 77 to rotate in the reverse direction. The first transmission gear 77 drives the second rotating shaft 72 to rotate against the spring force through a one-way bearing, separating the first remainder line gear 73 and the second remainder line gear 76, waiting for the next remainder line taking operation.

[0084] The best embodiments of the present invention have been illustrated, and various changes or modifications made by those of ordinary skill in the art will not depart from the scope of the present invention.

Claims

1. An automatic winding and bottom shuttle changing mechanism, comprising a mounting substrate (1), characterized in that: The described mounting substrate (1) is provided with a winding and threading control device, a thread hooking device, an automatic shuttle changing device, and a device for taking the remaining thread of the bobbin core; the winding and threading control device includes a rotatable winding drive shaft (4), an outer sleeve of the winding drive shaft (4) is provided with a second mounting bearing (41), the second mounting bearing (41) is sleeved with a threading control shaft (51) capable of independent rotation, and the threading control shaft (51) is connected with a threading control piece (5); one end of the winding drive shaft (4) is connected to a winding drive motor through a winding transmission component, and the other end is provided with a rotary drive plate (42) for connecting to the bobbin core positioning hole (35a); the threading control shaft (51) is connected to a threading control motor (52) through a threading transmission component; the thread hooking device includes a thread hooking mounting bracket (6) fixed on the mounting substrate (1), a thread hooking drive cylinder (61) is fixed on the thread hooking mounting bracket (6), a piston rod of the thread hooking drive cylinder (61) is connected with a thread hooking mounting seat (62), the thread hooking mounting seat (62) has a thread hooking mounting cavity (63), a thread hooking rod (64) is fixed at the axis of the thread hooking mounting cavity (63), an outer sleeve of the thread hooking rod (64) is provided with a guide shaft sleeve (65) capable of telescoping in the thread hooking mounting cavity (63), and the front end of the thread hooking rod (64) has a thread hook capable of extending out of the guide shaft sleeve (65); the automatic shuttle changing device includes a rotatable shuttle changing drive shaft (2), an axially movable key shaft sleeve (21) is arranged on the shuttle changing drive shaft (2), and the key shaft sleeve (21) has a first connecting arm (21a) and a second connecting arm (21b) respectively extending towards both ends; outer ends of the first connecting arm (21a) and the second connecting arm (21b) are respectively connected with a bobbin core sleeve grabbing device; the mounting substrate (1) is provided with a shuttle changing control motor (22) for driving the shuttle changing drive shaft (2) to rotate.

2. The automatic winding and bottom shuttle changing mechanism according to claim 1, characterized in that: The described threading control piece (5) includes an arc plate body, one side of the arc plate body has a wire deflecting edge (5a), and the other side has a winding control arc edge (5b); a tangent positioning hole (5c) is formed on the outer end side of the winding control arc edge (5b), and a receiving groove (5d) is formed between the wire deflecting edge (5a) and the tangent positioning hole (5c).

3. The automatic winding and bottom shuttle changing mechanism according to claim 2, wherein: The winding control arc edge (5b) extends smoothly from the bottom thread contact starting point to the tangent positioning hole (5c); for any two adjacent points on the winding control arc edge (5b), the distance from the point closer to the tangent positioning hole (5c) to the normal line (18) is smaller than the distance from the point farther from the tangent positioning hole (5c) to the normal line (18).

4. The automatic winding and bottom shuttle changing mechanism according to claim 3, wherein: The threading control motor (52) is connected with a first threading control module for driving the threading control piece (5) to rotate counterclockwise so that the wire deflecting edge (5a) pushes the bottom thread into the first gap (361), and a second threading control module for driving the threading control piece (5) to rotate clockwise so that the winding control arc edge (5b) pushes the bottom thread to slide into the second lead hole (363) along the second gap (362).

5. The automatic winding and bottom shuttle changing mechanism according to claim 1, characterized in that: The described rotary drive plate (42) is connected to a first telescopic shaft (43). The first telescopic shaft (43) is coaxially and slidably installed inside the winding drive shaft (4). There are connecting keys between the outer wall of the first telescopic shaft (43) and the inner wall of the winding drive shaft (4). A first return spring (45) is sleeved on the first telescopic shaft (43).

6. The automatic winding and bottom shuttle changing mechanism according to claim 5, characterized in that: A second telescopic shaft (44) is coaxially installed inside the first telescopic shaft (43). The front end of the second telescopic shaft (44) has a connecting shaft portion for connecting the central through hole of the bobbin (35). The main body of the second telescopic shaft (44) is slidably installed inside the first telescopic shaft (43). A second return spring (46) is sleeved outside the main body of the second telescopic shaft (44).

7. The automatic winding and bottom shuttle changing mechanism according to claim 1, characterized in that: The installation substrate (1) is provided with a first wire pressing mounting seat (9) that can be lifted and lowered. The first wire pressing mounting seat (9) is provided with a second wire pressing mounting seat (91) that can move back and forth. The second wire pressing mounting seat (91) is provided with a wire inlet pipe (94) for inputting the bobbin thread and a rotatable wire pressing wheel disc (92). The installation substrate (1) is provided with a lifting cylinder (93) for driving the first wire pressing mounting seat (9) to move up and down. The first wire pressing mounting seat (9) is provided with a wire pressing drive cylinder (95) for driving the second wire pressing mounting seat (91) to move back and forth.

8. The automatic winding and bottom shuttle changing mechanism according to claim 1, characterized in that: The shuttle changing drive shaft (2) is fixedly connected to an axially moving substrate (23). An axial shuttle changing cylinder (24) for driving the key shaft sleeve (21) to slide axially is provided between the axial moving substrate (23) and the key shaft sleeve (21).

9. The automatic winding and bottom shuttle changing mechanism according to claim 1, characterized in that: The shuttle changing control motor (22) is connected to a first drive control module for driving the shuttle changing drive shaft (2) to rotate to the first shuttle picking angle, a second drive control module for driving the shuttle changing drive shaft (2) to rotate to the second shuttle picking angle, a third drive control module for driving the shuttle changing drive shaft (2) to rotate 180 degrees, a fourth control module for driving the shuttle changing drive shaft (2) to rotate to the remaining thread angle, and a fifth control module for driving the shuttle changing drive shaft (2) to rotate to the third shuttle picking angle.

10. The automatic winding and bottom shuttle changing mechanism according to claim 1, characterized in that: The device for picking the remaining thread of the shuttle core includes a remaining thread mounting frame (7). The remaining thread mounting frame (7) is provided with a rotatable first rotating shaft (71) and a second rotating shaft (72). One end of the first rotating shaft (71) is connected to a first remaining thread gear (73), and the other end is connected to a first synchronous wheel (75) driven by a remaining thread motor (74). One end of the second rotating shaft (72) is fixedly connected to a vertically arranged extension bracket (72a). The end of the extension bracket (72a) is provided with a rotatable second remaining thread gear (76). The other end of the second rotating shaft (72) is connected to a first transmission gear (77) through a one-way bearing. The first transmission gear (77) meshes with a second transmission gear (78) on the first rotating shaft (71).

Images