An automatic knotting device for quilting thread, an automatic knotting method for quilting thread, and a quilting template machine

Abstract

The application discloses a kind of automatic knotting device of quilting thread, automatic knotting method of quilting thread and quilting template machine, it is related to quilting processing technical field, automatic knotting device of quilting thread includes frame body, the clamping thread component and knotting component of setting in frame body, clamping thread component is used to clamp the thread end to be knotted and can drive the thread end clamped to be translated to predetermined knotting station, knotting component includes shaft, upper clamp jaw, lower clamp jaw, cam and roller, upper clamp jaw and lower clamp jaw are connected to shaft and rotate synchronously with shaft to be wound into thread ring with thread end, cam is fixedly arranged relative to frame body, lower clamp jaw can be moved relative to upper clamp jaw, roller is connected to lower clamp jaw and can move along the profile of cam with the rotation of lower clamp jaw, to make lower clamp jaw relative to upper clamp jaw switch between clamping state and open state according to preset timing, can realize the automatic knotting of quilting thread end, improve the efficiency and consistency of knotting.

Description

Technical Field

[0001] This invention relates to the field of quilting processing technology, and in particular to an automatic knotting device for quilting thread, an automatic knotting method for quilting thread, and a quilting template machine. Background Technology

[0002] Quilting is a common processing method that stitches fabric and filling together, widely used in the production of car seat cushions, mattresses, and other seating products. After the quilting process is completed, the ends of the sewing thread need to be knotted to prevent the seam from backing up, loosening, or fraying, ensuring the appearance and durability of the quilted product.

[0003] Currently, the knotting of quilted thread ends is mostly done manually, one by one. Workers need to manually tighten each thread end after quilting is completed. This not only results in low knotting efficiency and high labor intensity, but also makes it difficult to maintain a consistent tightness and strength between different thread ends, affecting the production efficiency and quality stability of quilted products.

[0004] Therefore, how to automatically knot the ends of quilted threads is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic quilting knotting device, an automatic quilting knotting method, and a quilting template machine, which can realize the automatic knotting of quilting thread ends, improve the efficiency and consistency of knotting quilting thread ends, and reduce the labor intensity of knotting.

[0006] To achieve the above objectives, the present invention provides an automatic knotting device for quilting, comprising a frame, a wire clamping assembly and a knotting assembly disposed on the frame. The wire clamping assembly is used to clamp the wire end to be knotted and can drive the clamped wire end to be translated to a predetermined knotting position. The knotting assembly includes a rotating shaft, an upper clamp, a lower clamp, a cam and a roller. The upper clamp and the lower clamp are both connected to the rotating shaft and rotate synchronously with the rotating shaft to wind the wire end translated to the predetermined knotting position into a loop. The cam is fixedly disposed relative to the frame, the lower clamp is movable relative to the upper clamp, and the roller is connected to the lower clamp and can move along the contour of the cam as the lower clamp rotates, so that the lower clamp switches between a clamping state and an open state relative to the upper clamp according to a preset timing sequence.

[0007] In one possible implementation, the wire clamping assembly includes a telescopic cylinder, a mounting base, a wire clamping seat, and a wire clamping arm. The wire clamping seat and the wire clamping arm are connected to the mounting base, and the mounting base is connected to the piston end of the telescopic cylinder. The telescopic cylinder is used to drive the wire clamping seat and the wire clamping arm to translate. The wire clamping arm can move relative to the wire clamping seat to cooperate with the wire clamping seat to clamp or release the wire end.

[0008] In one possible implementation, the wire clamping assembly further includes a needle-type cylinder and a return spring. The needle-type cylinder is connected to the mounting base, and the piston rod of the needle-type cylinder is connected to the wire clamping arm for driving the wire clamping arm to move closer to the wire clamping base to clamp the wire end. The return spring is connected to the wire clamping arm and the mounting base, driving the wire clamping arm to move away from the wire clamping base to release the wire end.

[0009] In one possible implementation, the knotting assembly further includes a bushing fixed relative to the frame, the bushing being fitted around the outer periphery of the rotating shaft, the rotating shaft being rotatable relative to the bushing, and a cam fixed to the top of the bushing.

[0010] In one possible implementation, the knotting assembly further includes a fixed plate, a motor, a driven bevel gear, and a driving bevel gear. The fixed plate is connected to the frame, the motor is connected to the fixed plate, the driving bevel gear is connected to the output end of the motor, and the driven bevel gear is connected to the end of the rotating shaft opposite to the upper clamping jaw, and the driven bevel gear meshes with the driving bevel gear.

[0011] In one possible implementation, a first pin is provided between the upper jaw and the lower jaw, the first pin being perpendicular to the axis of the rotating shaft, and the lower jaw being able to rotate relative to the upper jaw about the axis of the first pin.

[0012] In one possible implementation, a second pin is provided between the wire clamping arm and the wire clamping seat. The second pin is perpendicular to the extension and retraction direction of the telescopic cylinder, and the wire clamping arm can rotate relative to the wire clamping seat about the axis of the second pin.

[0013] Based on the above, the present invention also provides an automatic knotting method for quilting threads, applicable to the automatic knotting device for quilting threads provided in the above embodiments, comprising the following steps: Obtain the positioning signal of the wire clamping assembly clamping the wire end and moving the wire end to the predetermined knotting position; Control the rotation of the shaft so that the upper and lower jaws can wrap the wire end to form a loop; The control shaft continues to rotate so that the upper and lower jaws open, allowing the thread end after the loop is formed to enter between the upper and lower jaws; The control spindle continues to rotate so that the upper and lower jaws clamp the wire end; Control the wire clamping assembly to release the wire end; The control shaft continues to rotate, causing the loop to disengage from the clamp and tighten to form a knot; Control the upper and lower jaws to loosen the knot and reset.

[0014] In one possible implementation, the step of controlling the rotation of the shaft to cause the upper and lower jaws to wrap the wire end to form a loop includes: controlling the shaft to drive the upper and lower jaws to rotate synchronously for one revolution, so that the wire end is wrapped around the outside of the upper and lower jaws to form a loop.

[0015] Based on the above, the present invention also provides a quilting template machine, including the automatic knotting device for quilting provided in the above embodiments.

[0016] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects: the quilted thread end is first clamped by the thread clamping component and moved to the predetermined knotting position to complete the positioning. Then, the rotating shaft of the knotting component drives the upper and lower clamps to rotate synchronously, and the positioned thread end is wound into a loop on the upper and lower clamps. During this process, since the cam is fixed relative to the frame, and the roller connected to the lower clamp rotates with the clamp and moves along the contour of the fixed cam, the lower clamp is pushed by the cam contour and automatically switches between the clamping state and the open state relative to the upper clamp according to a preset time sequence. The automatic knotting device for quilting can automatically and continuously complete the entire knotting process from thread end positioning to looping, clamping and finally unlooping and tightening into a knot, thereby realizing the automatic knotting of quilted thread ends, replacing manual knotting, improving the efficiency and consistency of knotting, and reducing the labor intensity of knotting. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the knotting component provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the wire clamping assembly provided in an embodiment of the present invention; Figure 3 This is a partial schematic diagram of the quilting template machine provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the wire clamping assembly provided in an embodiment of the present invention for clamping wire ends; Figure 5 This is a schematic diagram of the structure of the wire clamping assembly provided in an embodiment of the present invention when it drives the wire end to move to the predetermined knotting position; Figure 6 This is a schematic diagram of the structure of the upper and lower jaws provided in an embodiment of the present invention when the wire end is wound into a loop; Figure 7 This is a schematic diagram of the structure of the loop forming a knot according to an embodiment of the present invention.

[0019] in: 110-Telescopic cylinder; 120-Mounting base; 130-Cable clamping base; 140-Cable clamping arm; 150-Needle cylinder; 160-Return spring; 170-Mounting plate; 210-Shaft; 220-Upper gripper; 230-Lower gripper; 240-Cam; 250-Roller; 260-Busset; 270-Fixing plate; 271-Motor; 280-Driven bevel gear; 290-Driving bevel gear; 300 - thread end; 400 - First pin; 500 - Second pin; 600-Fixed tool; 700 - Cutting; 800-rotary shuttle; 900-frame. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this invention.

[0023] The purpose of this invention is to provide an automatic quilting knotting device, an automatic quilting knotting method, and a quilting template machine, which can realize the automatic knotting of quilting thread ends, improve the efficiency and consistency of knotting quilting thread ends, and reduce the labor intensity of knotting.

[0024] Please see Figures 1 to 7This invention provides an automatic knotting device for quilting, including a frame 900, a wire clamping assembly and a knotting assembly disposed on the frame 900. The wire clamping assembly is used to clamp the wire end 300 to be knotted and can drive the clamped wire end 300 to move horizontally to a predetermined knotting position. The knotting assembly includes a rotating shaft 210, an upper clamp 220, a lower clamp 230, a cam 240 and a roller 250. The upper clamp 220 and the lower clamp 230 are both connected to the rotating shaft 210 and move horizontally with the rotating shaft. The rotating shaft 210 rotates synchronously to wind the thread end 300, which has been moved to the predetermined knotting position, into a loop. The cam 240 is fixed relative to the frame 900. The lower gripper 230 is movable relative to the upper gripper 220. The roller 250 is connected to the lower gripper 230 and can move along the contour of the cam 240 as the lower gripper 230 rotates, so that the lower gripper 230 switches between a clamped state and an open state relative to the upper gripper 220 according to a preset sequence. An elastic element can be provided between the upper gripper 220 and the lower gripper 230 to drive the roller 250 to always be in contact with the cam 240.

[0025] This automatic thread knotting device can be applied to quilting equipment for products such as car seat cushions, and is used to automatically knot the sewing thread ends 300 after quilting. The cam 240 can be an elliptical cam 240 or an eccentric cam 240. Taking the elliptical cam 240 as an example, the contour position corresponding to the short axis of the elliptical cam 240 corresponds to the clamping state of the lower jaw 230 relative to the upper jaw 220, and the contour position corresponding to the long axis of the elliptical cam 240 corresponds to the maximum opening state of the lower jaw 230 relative to the upper jaw 220. When the lower jaw 230 drives the roller 250 to rotate with the rotating shaft 210, the roller 250 reciprocates along the contour of the cam 240 between the positions corresponding to the short and long axes, thereby pushing the lower jaw 230 to open and close relative to the upper jaw 220. Since the cam 240 is fixed, the roller 250 moves a corresponding distance along the contour of the cam 240 every time the gripper rotates a certain angle, so that the opening and closing of the lower gripper 230 and the rotation of the shaft 210 maintain a fixed correspondence in timing, without the need to set up a separate drive element for the opening and closing of the gripper.

[0026] After quilting, the thread end 300 is first clamped by the thread clamping assembly and moved to the predetermined knotting position for positioning. Then, the rotating shaft 210 of the knotting assembly drives the upper jaw 220 and the lower jaw 230 to rotate synchronously, winding the positioned thread end 300 into a loop on the upper jaw 220 and the lower jaw 230. During this process, since the cam 240 is fixed relative to the frame 900, the roller 250 connected to the lower jaw 230 rotates with the jaw and moves along the fixed cam 240. The lower jaw 230 is pushed by the contour of the cam 240 relative to the upper jaw 220, and automatically switches between the clamping state and the open state according to a preset time sequence. This automatic quilting knotting device can automatically and continuously complete the entire knotting process from positioning the thread end 300 to looping, clamping and finally unlooping and tightening into a knot, thereby realizing the automatic knotting of the quilting thread end 300, replacing manual knotting, improving the efficiency and consistency of knotting, and reducing the labor intensity of knotting.

[0027] Furthermore, the wire clamping assembly includes a telescopic cylinder 110, a mounting base 120, a wire clamping seat 130, and a wire clamping arm 140. The telescopic cylinder 110 is fixed to the frame 900 via a mounting plate 170. The wire clamping seat 130 and the wire clamping arm 140 are connected to the mounting base 120, which is connected to the piston end of the telescopic cylinder 110. The telescopic cylinder 110 is used to drive the wire clamping seat 130 and the wire clamping arm 140 to translate. The wire clamping arm 140 can move relative to the wire clamping seat 130 to cooperate with the wire clamping seat 130 to clamp or release the wire end 300. The telescopic cylinder 110 can be a pneumatic cylinder or a hydraulic cylinder. When the piston end of the telescopic cylinder 110 extends, it drives the mounting base 120, along with the wire clamping seat 130 and the wire clamping arm 140 on it, to move toward the wire end 300, so that the wire clamping seat 130 and the wire clamping arm 140 are close to the wire end 300 to be knotted; when the piston end of the telescopic cylinder 110 retracts, it drives the wire clamping seat 130 and the wire clamping arm 140, along with the clamped wire end 300, to retract to the predetermined knotting position, thereby completing the wire taking and positioning of the wire end 300.

[0028] Furthermore, the wire clamping assembly also includes a needle-type cylinder 150 and a return spring 160. The needle-type cylinder 150 is connected to the mounting base 120, and the piston rod of the needle-type cylinder 150 is connected to the wire clamping arm 140, used to drive the wire clamping arm 140 closer to the wire clamping seat 130 to clamp the wire end 300. The return spring 160 is connected to the wire clamping arm 140 and the mounting base 120, driving the wire clamping arm 140 away from the wire clamping seat 130 to release the wire end 300. The return spring 160 can be a tension spring or a torsion spring. When the wire end 300 needs to be clamped, the piston rod of the needle-type cylinder 150 extends, driving the clamping arm 140 to overcome the elastic force of the return spring 160 and approach the clamping seat 130, clamping the wire end 300 between the clamping arm 140 and the clamping seat 130. When the wire end 300 needs to be released, the piston rod of the needle-type cylinder 150 retracts, and the clamping arm 140, under the elastic force of the return spring 160, moves away from the clamping seat 130 and opens, thereby releasing the wire end 300. In this way, the needle-type cylinder 150 and the return spring 160 work together to enable the wire clamping assembly to stably clamp and release wire ends 300 of varying lengths or those that are relatively loose.

[0029] Furthermore, the knotting assembly also includes a bushing 260, which is fixed relative to the frame 900. Exemplarily, the bushing 260 is fixed to the fixing plate 270 described below. The bushing 260 is sleeved on the outer periphery of the rotating shaft 210, which is rotatable relative to the bushing 260. At the same time, a limiting member is provided between the bushing 260 and the rotating shaft 210 to limit the movement of the rotating shaft 210 relative to the bushing 260 in the axial direction of the rotating shaft 210. A cam 240 is fixed to the top of the bushing 260 and has a clearance hole for the rotating shaft 210 to pass through. The rotating shaft 210 passes through the bushing 260 and can rotate freely relative to the bushing 260. The cam 240 is fixed to the top of the bushing 260 and remains fixed along with the bushing 260. Thus, when the rotating shaft 210, the upper jaw 220 and the lower jaw 230 rotate, the cam 240 always remains stationary, providing a fixed motion profile for the roller 250.

[0030] Furthermore, the knotting assembly also includes a fixed plate 270, a motor 271, a driven bevel gear 280, and a driving bevel gear 290. The fixed plate 270 is connected to the frame 900, the motor 271 is connected to the fixed plate 270, the driving bevel gear 290 is connected to the output end of the motor 271, and the driven bevel gear 280 is connected to the end of the rotating shaft 210 opposite to the upper gripper 220, and the driven bevel gear 280 meshes with the driving bevel gear 290. The motor 271 can be a servo motor 271 or a stepper motor 271. The motor 271 is fixed to the frame 900 via the fixing plate 270. The output end of the motor 271 transmits power to the rotating shaft 210 through the meshing drive bevel gear 290 and driven bevel gear 280, thereby driving the rotating shaft 210 to rotate together with the upper jaw 220 and the lower jaw 230. The use of the meshing drive bevel gear 290 and driven bevel gear 280 can change the direction of power transmission and make the rotation of the rotating shaft 210 smooth.

[0031] Furthermore, a first pin 400 is provided between the upper jaw 220 and the lower jaw 230. The first pin 400 is perpendicular to the axis of the rotating shaft 210. The lower jaw 230 can rotate relative to the upper jaw 220 around the axis of the first pin 400, thereby opening and closing the lower jaw 230 relative to the upper jaw 220 when the roller 250 moves along the contour of the cam 240. A second pin 500 is provided between the wire clamping arm 140 and the wire clamping seat 130. The second pin 500 is perpendicular to the extension and retraction direction of the telescopic cylinder 110. The wire clamping arm 140 can rotate relative to the wire clamping seat 130 around the axis of the second pin 500, thereby closing and opening the wire clamping arm 140 relative to the wire clamping seat 130 under the action of the needle cylinder 150 and the return spring 160.

[0032] The automatic knotting device for quilting can be used in conjunction with the thread cutting mechanism of the quilting equipment. The thread cutting mechanism includes a fixed blade 600 and a moving blade 700. After the quilting process is completed, the thread cutting mechanism cuts the top thread and bottom thread of the sewing. The cut thread ends 300 are temporarily clamped between the fixed blade 600 and the moving blade 700 to keep them fixed and prevent them from falling apart. The bottom thread can be provided by the rotary hook 800 of the quilting equipment. Subsequently, the telescopic cylinder 110 of the wire clamping assembly extends, driving the wire clamping seat 130 and the wire clamping arm 140 forward to the wire end 300. The needle-type cylinder 150 drives the wire clamping arm 140 to cooperate and close with the wire clamping seat 130 to clamp the wire end 300. The telescopic cylinder 110 then retracts, bringing the wire end 300 back to the predetermined knotting position to complete the positioning. Next, the motor 271 drives the rotating shaft 210 via the driving bevel gear 290 and the driven bevel gear 280, causing the upper clamping jaw 220 and the lower clamping jaw 230 to rotate synchronously. With the cooperation of the cam 240 and the roller 250, the lower clamping jaw... The upper jaw 230 opens and closes relative to the upper jaw 220 in a preset sequence. First, the thread end 300 is wrapped around the outside of the jaw to form a loop. Then, the loop is opened to allow the thread end 300 to enter between the jaws. The thread end 300 is then clamped, and the clamping assembly releases the thread end 300, allowing it to be transferred to the knotting assembly. Finally, the upper jaw 220 and the lower jaw 230 continue to rotate, and the loop is released from the jaws under the tension of the thread end 300 and tightens to form a self-locking knot. The upper jaw 220 and the lower jaw 230 then release the knot and reset, and the finished thread bundle is removed to enter the next knotting cycle.

[0033] Based on the above, the present invention also provides an automatic knotting method for quilting threads, which uses the above-mentioned automatic knotting device for quilting threads and includes the following steps.

[0034] The system obtains a positioning signal indicating that the wire clamping assembly clamps the wire end 300 and moves the wire end 300 to the predetermined knotting position. The positioning signal can be provided by a position sensor or a positioning detection element of the telescopic cylinder 110 located at the predetermined knotting position. When the wire clamping assembly clamps the wire end 300 and retracts to the predetermined knotting position, the positioning signal is triggered to indicate that the wire end 300 has been positioned and can be knotted.

[0035] The rotating shaft 210 is controlled to rotate so that the upper jaw 220 and the lower jaw 230 can wrap the wire end 300 to form a loop. After receiving the positioning signal, the motor 271 is controlled to drive the rotating shaft 210 to rotate. The upper jaw 220 and the lower jaw 230 rotate synchronously with the rotating shaft 210, wrapping the wire end 300 located at the jaws around the outside of the upper jaw 220 and the lower jaw 230 to form a loop.

[0036] The control shaft 210 continues to rotate so that the upper jaw 220 and the lower jaw 230 open, allowing the thread end 300 after forming the loop to enter between the upper jaw 220 and the lower jaw 230; as the shaft 210 continues to rotate, the roller 250 moves along the contour of the cam 240 to the position corresponding to the open state, so that the lower jaw 230 opens relative to the upper jaw 220, allowing the thread end 300 after forming the loop to enter between the open upper jaw 220 and the lower jaw 230.

[0037] The control shaft 210 continues to rotate so that the upper jaw 220 and the lower jaw 230 clamp the wire end 300; as the shaft 210 continues to rotate, the roller 250 moves along the contour of the cam 240 to the position corresponding to the clamping state, so that the lower jaw 230 closes relative to the upper jaw 220, clamping the wire end 300 that has entered between the jaws.

[0038] The control wire clamping assembly releases the wire end 300; after the wire end 300 is clamped by the upper clamp 220 and the lower clamp 230, the control wire clamping assembly needle cylinder 150 retracts, and the wire clamping arm 140 opens under the action of the return spring 160 to release the wire end 300, so that the wire end 300 is completely held by the upper clamp 220 and the lower clamp 230.

[0039] The control shaft 210 continues to rotate, causing the loop to disengage from the clamps and tighten to form a knot. As the shaft 210 continues to rotate, the loop disengages from the upper clamp 220 and lower clamp 230 under the pulling force of the thread end 300 held by the clamps, and tightens to form a self-locking knot.

[0040] The upper clamp 220 and lower clamp 230 are controlled to loosen the knot and reset. After the knot is formed, the control roller 250 moves along the contour of the cam 240 to open the lower clamp 230 relative to the upper clamp 220 and loosen the knot. The rotating shaft 210 drives the upper clamp 220 and lower clamp 230 to rotate to their initial positions and reset. The finished wire harness is removed, and the automatic quilting knotting device can then enter the next knotting cycle.

[0041] Furthermore, the step of controlling the rotation of the shaft 210 to allow the upper clamp 220 and lower clamp 230 to wrap the thread end 300 to form a loop includes: controlling the shaft 210 to drive the upper clamp 220 and lower clamp 230 to rotate synchronously for one revolution, so that the thread end 300 is wrapped around the outside of the upper clamp 220 and lower clamp 230 to form a loop. That is, the shaft 210 drives the upper clamp 220 and lower clamp 230 to rotate synchronously for one revolution, so that the thread end 300 is wrapped around the outside of the clamps once to form a reserved loop, which prepares for the subsequent entry of the thread end 300 into the clamps and being clamped, unlooped and knotted.

[0042] Based on the above, the present invention also provides a quilting template machine, including the aforementioned automatic quilting knotting device. The quilting template machine may further include a sewing mechanism and the aforementioned thread-cutting mechanism. The sewing mechanism is used to complete the quilting of products such as car seat cushions. The thread-cutting mechanism is used to cut the top and bottom threads after quilting and temporarily clamp the thread end 300 between the fixed blade 600 and the moving blade 700. The automatic quilting knotting device automatically knots the cut thread end 300, thereby achieving continuous quilting, thread cutting, and knotting operations on a single quilting template machine.

[0043] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0044] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0045] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. An automatic knotting device for quilting thread, characterized in that, The device includes a frame (900), a wire clamping assembly and a knotting assembly disposed on the frame (900). The wire clamping assembly is used to clamp the wire end (300) to be knotted and can drive the clamped wire end (300) to be translated to a predetermined knotting position. The knotting assembly includes a rotating shaft (210), an upper jaw (220), a lower jaw (230), a cam (240), and a roller (250). The upper jaw (220) and the lower jaw (230) are both connected to the rotating shaft (210) and rotate synchronously with the rotating shaft (210) to... The end of the line (300) that has been moved to the predetermined knotting station is wound into a loop. The cam (240) is fixed relative to the frame (900). The lower jaw (230) is movable relative to the upper jaw (220). The roller (250) is connected to the lower jaw (230) and can move along the contour of the cam (240) as the lower jaw (230) rotates, so that the lower jaw (230) switches between a clamping state and an open state relative to the upper jaw (220) according to a preset timing sequence.

2. The automatic knotting device for quilting according to claim 1, characterized in that, The wire clamping assembly includes a telescopic cylinder (110), a mounting base (120), a wire clamping seat (130), and a wire clamping arm (140). The wire clamping seat (130) and the wire clamping arm (140) are connected to the mounting base (120), and the mounting base (120) is connected to the piston end of the telescopic cylinder (110). The telescopic cylinder (110) is used to drive the wire clamping seat (130) and the wire clamping arm (140) to translate. The wire clamping arm (140) can move relative to the wire clamping seat (130) to cooperate with the wire clamping seat (130) to clamp or release the wire end (300).

3. The automatic knotting device for quilting according to claim 2, characterized in that, The wire clamping assembly further includes a needle cylinder (150) and a return spring (160). The needle cylinder (150) is connected to the mounting base (120), and the piston rod of the needle cylinder (150) is connected to the wire clamping arm (140) to drive the wire clamping arm (140) to move closer to the wire clamping seat (130) to clamp the wire end (300). The return spring (160) is connected to the wire clamping arm (140) and the mounting base (120) to drive the wire clamping arm (140) away from the wire clamping seat (130) to release the wire end (300).

4. The automatic knotting device for quilting according to claim 1, characterized in that, The knotting assembly also includes a bushing (260), which is fixed relative to the frame (900). The bushing (260) is sleeved on the outer periphery of the rotating shaft (210), which is rotatable relative to the bushing (260). The cam (240) is fixed on the top of the bushing (260).

5. The automatic knotting device for quilting according to claim 1, characterized in that, The knotting assembly also includes a fixed plate (270), a motor (271), a driven bevel gear (280), and a driving bevel gear (290). The fixed plate (270) is connected to the frame (900), the motor (271) is connected to the fixed plate (270), the driving bevel gear (290) is connected to the output end of the motor (271), and the driven bevel gear (280) is connected to the end of the rotating shaft (210) away from the upper clamp (220), and the driven bevel gear (280) meshes with the driving bevel gear (290).

6. The automatic knotting device for quilting according to claim 1, characterized in that, A first pin (400) is provided between the upper jaw (220) and the lower jaw (230). The first pin (400) is arranged perpendicular to the axis of the rotating shaft (210). The lower jaw (230) can rotate relative to the upper jaw (220) around the axis of the first pin (400).

7. The automatic knotting device for quilting according to claim 2, characterized in that, A second pin (500) is provided between the clamping arm (140) and the clamping seat (130). The second pin (500) is perpendicular to the extension and retraction direction of the telescopic cylinder (110). The clamping arm (140) can rotate relative to the clamping seat (130) around the axis of the second pin (500).

8. An automatic knotting method for quilting threads, applicable to the automatic knotting device for quilting threads as described in any one of claims 1-7, characterized in that, Includes the following steps: Obtain the positioning signal of the wire clamping assembly clamping the wire end (300) and moving the wire end (300) to the predetermined knotting position; The rotating shaft (210) is controlled to rotate so that the upper jaw (220) and the lower jaw (230) wrap the wire end (300) to form a wire loop; The rotating shaft (210) is controlled to continue rotating so that the upper jaw (220) and the lower jaw (230) open, so that the end of the wire (300) after forming the loop can enter between the upper jaw (220) and the lower jaw (230); Control the rotating shaft (210) to continue rotating so that the upper jaw (220) and the lower jaw (230) clamp the wire end (300). Control the wire clamping assembly to release the wire end (300); The rotating shaft (210) is controlled to continue rotating, causing the loop to disengage from the clamp and tighten to form a knot; Control the upper jaw (220) and the lower jaw (230) to loosen the knot and reset.

9. The automatic knotting method for quilting threads according to claim 8, characterized in that, The step of controlling the rotation of the shaft (210) to make the upper jaw (220) and the lower jaw (230) wrap the wire end (300) to form a loop includes: controlling the shaft (210) to drive the upper jaw (220) and the lower jaw (230) to rotate synchronously for one revolution, so that the wire end (300) is wrapped around the outside of the upper jaw (220) and the lower jaw (230) to form a loop.

10. A quilting template machine, characterized in that, Includes the automatic knotting device for quilting as described in any one of claims 1-7.

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