Intelligent upper thread tension adjustment device and adjustment method thereof

Abstract

The present invention relates to the field of sewing technology, and relates to an intelligent upper thread tension adjustment device and an adjustment method thereof. The present invention comprises an upper thread tension component, a sewing material thickness detection component and a control component; during the sewing process, the sewing material thickness is autonomously sensed, and the upper thread tension is automatically and intelligently adjusted according to the sewing material thickness, completely eliminating the step of manually adjusting the tension, and during the sewing process, the upper thread tension can change in real time according to the sewing material thickness; the upper thread tension can also be directly set through a liquid crystal screen, and the upper thread tension adjustment parameters are visualized. The present invention is simple to operate; keeps the upper thread trace stable; after cutting the thread, the thread head is made shorter, which greatly saves the sewing product production process, improves the sewing product production efficiency, and the thread trace is stable and beautiful during the entire sewing process.

Description

Technical Field

[0001] The invention relates to the technical field of sewing, and in particular to an intelligent upper thread tension regulating device and a regulating method thereof. Background Art

[0002] At present, the upper thread tension adjustment mechanism of traditional sewing machines adjusts the upper thread tension by manually rotating the knob to compress the spring. For fabrics of different thicknesses, the knob must be turned again to change the compression amount of the spring to adjust the upper thread tension, which is a lot of repetitive and useless labor, reducing production efficiency; and due to the large manual adjustment error, the upper thread tension change is not accurate, the upper thread tension is too large, the sewing material will wrinkle, and the upper thread tension is too small, the thread loop will appear, resulting in inconsistent upper thread stitches; in addition, the existing sewing equipment has too long thread ends, and a special process is required to trim the thread ends. There are many production processes for sewing products, low production efficiency of sewing products, and unsightly sewing effects. Summary of the invention

[0003] In view of this, the present invention provides an intelligent upper thread tension adjustment device and an adjustment method thereof. During the sewing process, the device can autonomously sense the thickness of the sewing material, and automatically and intelligently adjust the upper thread tension according to the thickness of the sewing material, completely eliminating the step of manually adjusting the tension. During the sewing process, the upper thread tension can change in real time according to the thickness of the sewing material. The upper thread tension can also be directly set through a liquid crystal screen, and the upper thread tension adjustment parameters are visualized and easy to operate, thereby keeping the upper thread stitch stable. After thread trimming, the thread end is made shorter, which greatly saves the sewing product production process, improves the sewing product production efficiency, and the stitch is stable and beautiful during the entire sewing process.

[0004] In order to solve the problems existing in the prior art, the technical solution of the present invention is: an adjustment method of an intelligent needle thread tension adjustment device, characterized in that: the adjustment method is:

[0005] During the sewing process, the material thickness detection component generates different Hall voltages according to the change of material thickness, and transmits them to the control box. The control box converts the Hall voltage into the corresponding material thickness value and forms a corresponding electronic pulse signal. The electronic pulse signal is used to control the rotation of the stepper motor of the upper thread tension component and the compression of the tower spring through the serial data port. At the same time, the real-time rotation of the optical axis of the stepper motor is detected. When sewing materials of different thicknesses, the electric control box autonomously generates corresponding electronic pulse signals, thereby controlling the rotation of the stepper motor and the compression of the tower spring, and realizing intelligent adjustment of the upper thread tension.

[0006] When trimming the thread, the stepper motor rotates in forward and reverse directions, driving the follower and the pressure rod away from or close to the stepper motor, so that the stop pin limits the twisting of the thread-taking spring part under the push of the follower, and the tower spring is compressed or stretched, so that the two clamping discs clamp the thread back and forth, making the length of the trimmed thread head stable.

[0007] An intelligent upper thread tension regulating device comprises an upper thread tension component, a sewing material thickness detection component and a control component;

[0008] The surface line tension assembly includes a stepper motor, the optical axis of the stepper motor extends into a hole at one end of the coupling and is tightened by a tightening screw; a lead screw transmission rod is sleeved in the hole at the other end of the coupling and is tightened by a tightening screw, so that the lead screw transmission rod and the stepper motor rotate synchronously, the other end of the lead screw transmission rod is connected to the follower lead screw nut, and the other end of the follower is fastened to the pressure rod by a pin, the large hole on the stop pin sheet, the clamp bracket, the clamp disc, the shield and the tower spring are sequentially sleeved on the pressure rod, the slender shaft of the stop pin extends into the through hole of the clamp bracket close to the outer side of the shaft, the reset tower spring is sleeved on the pressure rod between the stop pin and the clamp bracket, so that the stop pin is reset after actuation, a surface line is arranged between the two clamp discs, the tower spring is compressed under the use of the pressure rod so that the two clamp discs clamp the surface line to form the surface line tension, and the compression amount of the tower spring is proportional to the surface line tension;

[0009] The sewing material thickness detection assembly comprises a magnetic sensing component, a mounting plate, a magnetic moving component, and a presser foot component;

[0010] The magnetic induction element is fixedly connected to one side of the mounting plate, the magnetic moving element is arranged on the other side of the mounting plate and is fastened to the upper part of the presser foot component, the magnetic induction element is connected to the electric control box of the control component through a wire, and the control component also includes a liquid crystal screen;

[0011] Furthermore, a mounting plate is sleeved on the optical axis of the stepper motor, and the mounting plate is fixedly connected to the housing of the sewing machine.

[0012] Furthermore, a limiting plate is sleeved on the outer wall of the driven member to limit the rotation of the driven member, so that the pressure rod and the driven member can move axially, and the limiting plate is fixed on the sewing machine casing.

[0013] Furthermore, the end of the pressure rod is fastened to the limiting plate by a pin.

[0014] Furthermore, the coupling is a hollow shaft with a tightening screw hole arranged on the outer wall.

[0015] Furthermore, the structure of the wire clamp bracket is a cylinder with a stepped central hole, a support hole is arranged on the cylindrical outer wall perpendicular to the large hole, and an axial through hole is arranged near the outer side of the cylinder.

[0016] Furthermore, the wire clamp bracket is fastened to the casing.

[0017] Furthermore, the liquid crystal screen is fixed on the casing.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] 1. The present invention can intelligently sense and detect the thickness of the sewing material in real time, and autonomously and intelligently adjust the tension of the upper thread in real time according to the thickness of the sewing material, so that the upper thread stitches always remain stable;

[0020] 2. The upper thread tension adjustment parameters of the present invention are visualized and easy to adjust;

[0021] 3. The present invention makes the thread ends shorter, greatly saves the sewing product production process, improves the production efficiency of sewing products, and the stitches are stable and beautiful during the whole sewing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the assembly of the present invention;

[0023] Figure 2 It is a schematic diagram of the upper thread tension assembly mechanism of the present invention;

[0024] Figure 3 This is a schematic diagram of the split structure of the upper thread tension assembly of the present invention;

[0025] Figure 4 This is a schematic diagram of the mechanism of the seam material thickness detection component of the present invention;

[0026] Figure 5 This is a schematic diagram of the assembly split structure of the seam material thickness detection component of the present invention;

[0027] Figure 6 It is a schematic diagram of the control component mechanism of the present invention;

[0028] Figure 7 It is an adjustment interface for the thickness of the sewing material and the tension of the surface thread of the liquid crystal screen of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the mounting plate of the present invention;

[0030] Fig. 9 It is a schematic diagram of the coupling structure of the present invention;

[0031] Fig.10 It is a schematic diagram of the stop pin structure of the present invention;

[0032] Fig.11 It is a schematic diagram of the structure of the wire clamp bracket of the present invention;

[0033] Fig.12 It is a schematic diagram of the structure of the wire clamping rod of the present invention;

[0034] Fig.13 It is a schematic diagram of the structure of the magnetic moving part of the present invention;

[0035] In the figure: Description of reference numerals: 1-needle thread tension assembly, 2-sewing material thickness detection assembly, 3-control assembly;

[0036] 1-1 stepper motor, 1-2 mounting plate, 1-3 coupling, 1-4 screw transmission rod, 1-5 follower, 1-6 limit plate, 1-7 stop pin, 1-8 reset tower spring, 1-9 clamp bracket, 1-10 take-up spring, 1-11 clamp rod, 1-12 clamp disc, 1-13 shield, 1-14 tower spring, 1-15 pressure rod, 1-16 surface thread;

[0037] 2-1 magnetic sensing element, 2-2 mounting plate, 2-3 magnetic moving element, 2-4 presser foot element, 2-5 sewing material, 2-6 needle plate, 2-7 magnetic block;

[0038] 3-1 Electric control box, 3-2 LCD screen. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The present invention provides an intelligent upper thread tension adjustment device (see Figure 1-Figure 3 ), including a surface thread tension component 1, a sewing material thickness detection component 2, and a control component 3;

[0041] The surface thread tension assembly 1 includes a stepping motor 1-1, a mounting plate 1-2, a coupling 1-3, a transmission rod 1-4, a follower 1-5, a limit plate 1-6, a stop pin 1-7, a reset tower spring 1-8, a clamp bracket 1-9, a thread take-up spring 1-10, a clamp rod 1-11, a clamp disc 1-12, a shield 1-13, a tower spring 1-14, and a pressure rod 1-15;

[0042] The structure of the above-mentioned mounting plate 1-2 is that connecting ears extend from the right side and the lower side, and a large circular hole is set in the center. The connecting ears are connected to the housing, such as Figure 8 As shown;

[0043] The structure of the coupling 1-3 is a hollow shaft with a tightening screw hole on the outer wall. Fig. 9 As shown;

[0044] The structure of the above-mentioned stop pin 1-7 is a slender shaft with a thin disc at one end, and a through hole is formed on the thin disc. Fig.10 As shown;

[0045] The structure of the clamp bracket 1-9 is a cylindrical part with a stepped central hole, a support hole is arranged on the cylindrical outer wall perpendicular to the large hole, and an axial through hole is arranged near the outer side of the cylinder. Fig.11 As shown;

[0046] The structure of the clamping rod 1-11 is a stepped shaft part with a through hole in the center, such as Fig.12As shown;

[0047] The stepper motor 1-1 is fastened to the mounting plate 1-2 by screws, and the mounting plate 1-2 is fixed to the casing. The optical axis of the stepper motor 1-1 is sleeved in the hole at one end of the coupling 1-3 and is supported by a tightening screw, and the transmission rod 1-4 is sleeved in the hole at the other end and is supported by a tightening screw, so that the transmission rod 1-4 can rotate synchronously with the stepper motor 1-1. The driven member 1-5 and the transmission rod 1-4 are matched with a screw nut at one end, and the other end is fastened to the pressure rod 1-15 by a pin. The limit plate 1-6 is fixed to the casing, and the limit plate 1-6 hole is sleeved with the driven member 1-5, thereby limiting the rotation of the driven member 1-5, so that the pressure rod 1-15 and the driven member 1-5 are driven axially when the stepper motor 1-1 rotates. The stop pin 1-7 with a thin disc and a large hole is sleeved on the pressure rod 1-15, and the slender shaft is sleeved near the clamp bracket 1-9. The thread clamp bracket 1-9 is fastened to the casing, and a thread take-up spring 1-10 and a thread clamp rod 1-11 are sleeved in the center hole. The outer wall of the thread clamp rod 1-11 is sleeved in the thread take-up spring 1-10. The center hole is sleeved with a pressure rod 1-15, which is supported by the tightening hole on the thread clamp bracket 1-9. The thread clamp disc 1-12, the protective cover 1-13 and the tower spring 1-14 are sleeved on the pressure rod 1-15 in sequence. The surface line is between the two thread clamp discs 1-12. The tower spring 1-14 is compressed under the use of the pressure rod 1-15 so that the two thread clamp discs 1-12 clamp the surface line to form the surface line tension. The compression amount of the tower spring 1-14 is proportional to the surface line tension. Figure 2 and Figure 3 ;

[0048] The sewing material thickness detection assembly 2 comprises a magnetic sensing element 2-1, a mounting plate 2-2, a magnetic moving element 2-3, a presser foot component 2-4, sewing material 2-5, and a needle plate 2-6; the needle plate 2-6 is fixed to the chassis floor.

[0049] The magnetic moving part 2-3 is provided with a circular hole, and a magnetic block 2-7 is provided in parallel with the hole;

[0050] The sewing material 2-5 is located between the presser foot component 2-4 and the needle plate 2-6. The presser foot component 2-4 is sleeved on the casing, with the lower part in contact with the sewing material 2-5 and the upper part fastened to the magnetic moving part 2-3. The presser foot component 2-4 moves up and down as the thickness of the sewing material 2-5 changes. The mounting plate 2-2 is fixed to the casing. The magnetic sensing part 2-1 is fastened to the mounting plate 2-2 by screws and connected to the electric control box 3-1 through a wire. The change in the thickness of the sewing material 2-5 will cause the magnetic moving part 2-3 to move up and down, so that the magnetic sensing part 2-1 generates different Hall voltages under the action of the Hall effect, and the magnetic sensing part 2-1 will generate a unique corresponding Hall voltage for sewing materials 2-5 of different thicknesses. Figure 4 and Figure 5 ;

[0051] The control assembly 3 comprises an electric control box 3-1 and a liquid crystal screen 3-2; the electric control box 3-1 is connected to the magnetic induction element 2-1 through a wire, receives different Hall voltages, and converts the Hall voltages into corresponding values ​​of the thickness of the sewing material, and forms corresponding electronic pulse signals, and transmits the values ​​of the thickness of the sewing material to the liquid crystal screen 3-2 through the serial data port, and controls the rotation of the stepper motor 1-1 through the electronic pulse signal through the serial data port, so that the compression amount of the tower spring 1-13 changes, and detects the real-time rotation position of the optical axis of the stepper motor 1-1. When sewing sewing materials 2-5 of different thicknesses, the electric control box 3-1 will autonomously generate corresponding electronic pulse signals, and then control the rotation of the stepper motor 1-1 and the compression amount of the tower spring 1-13, so as to realize intelligent adjustment of the surface thread tension; the liquid crystal screen 3-2 is fixed to the casing, and can display the thickness of the sewing material 2-5 in real time. An icon for adjusting the surface thread tension is provided on it, and the surface thread tension can also be adjusted by clicking the icon, see Figure 6 ;

[0052] An adjustment method for an intelligent upper thread tension adjustment device: during sewing, when the sewing material becomes thicker, the presser foot component 2-4 and the magnetic moving component 2-3 move upward, so that the magnetic sensing component 2-1 generates a unique corresponding Hall voltage, the electric control box 3-1 receives the Hall voltage generated by the magnetic sensing component 2-1 through a wire, and autonomously generates a corresponding electronic pulse signal according to the Hall voltage, and controls the forward rotation of the stepper motor 1-1 through the serial data port with the electronic pulse signal, drives the coupling 1-3 and the transmission rod 1-4 to rotate forward synchronously, so that the driven component 1-5 and the pressure rod 1-15 move in a direction close to the stepper motor, the pressure rod 1-15 increases the compression amount of the tower spring 1-14, and the clamping force between the two clamping discs 1-12 increases, so that the upper thread tension of the upper thread between the two clamping discs 1-12 increases; when When the sewing material becomes thinner, the presser foot component 2-4 and the magnetic moving part 2-3 move downward, so that the magnetic sensing part 2-1 generates a unique corresponding Hall voltage. The electric control box 3-1 receives the Hall voltage generated by the magnetic sensing part 2-1 through the wire, and independently generates a corresponding electronic pulse signal according to the Hall voltage. The electronic pulse signal is used to control the reverse rotation of the stepper motor 1-1 through the serial data port. The driven part 1-5 and the pressure rod 1-15 move away from the stepper motor. The pressure rod 1-15 reduces the compression of the tower spring 1-14, and the clamping force between the two clamping disks 1-12 becomes smaller. The surface thread tension between the two clamping disks 1-12 also decreases accordingly; during the sewing process, when the thickness of the sewing material changes, the surface thread tension will be adjusted intelligently and autonomously to always maintain the surface thread trace stable, and the sewing effect is more beautiful.

[0053] When cutting the thread, first the stepper motor 1-1 rotates in the reverse direction quickly, the follower 1-5 and the pressure rod 1-15 move quickly away from the stepper motor, and the stop pin 1-7 also moves away from the stepper motor under the push of the follower 1-5, and the slender shaft of the stop pin 1-7 prevents the thread-taking spring 1-10 from twisting the thread-passing part, the reset tower spring 1-8 is compressed, the tower spring 1-14 is restored to a free state, and the two clamping discs 1-12 are separated; then the stepper motor 1-1 rotates forward quickly, the follower 1-5 and the pressure rod 1-15 move quickly toward the stepper motor, and the stop pin 1-7 also moves toward the stepper motor under the action of the reset tower spring 1-8, and the slender shaft of the stop pin 1-7 no longer prevents the thread-taking spring 1-10 from twisting the thread-passing part, the reset tower spring 1-8 is restored to a free state, the tower spring 1-14 is compressed, and the two clamping discs 1-12 are clamped again;

[0054] At any start-up time, the electric control box 3-1 is connected to the magnetic induction element 2-1 through a wire, receives different Hall voltages, and converts the Hall voltages into corresponding sewing material thickness values, and transmits the sewing material thickness values ​​to the LCD screen 3-2 through the serial data port. The sewing material thickness can be directly read on the LCD screen 3-2, and the parameters are visualized and displayed intuitively.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. It should be pointed out that any improvements and modifications made by ordinary technicians in this technical field without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A method for adjusting the tension of an intelligent upper thread, characterized in that: The adjustment method is: During the sewing process, the sewing material thickness detection component (2) generates different Hall voltages according to the change of the sewing material thickness, and transmits them to the electric control box (3-1). The electric control box (3-1) converts the Hall voltage into a corresponding sewing material thickness value and generates a corresponding electronic pulse signal at the same time. The electronic pulse signal is used to control the rotation of the stepper motor (1-1) and the compression of the tower spring (1-14) of the upper thread tension component (1) through the serial data port, and the real-time rotation of the optical axis of the stepper motor (1-1) is detected at the same time. When sewing sewing materials (2-5) of different thicknesses, the electric control box (3-1) autonomously generates a corresponding electronic pulse signal, thereby controlling the rotation of the stepper motor (1-1) and the compression of the tower spring (1-14), thereby realizing intelligent adjustment of the upper thread tension. When the thread is trimmed, the stepper motor (1-1) rotates in forward and reverse directions, driving the follower (1-5) and the pressure rod (1-15) to move away from or approach the stepper motor (1-1), so that the stop pin (1-7) limits the twisting of the thread-passing part of the thread-taking spring (1-10) under the push of the follower (1-5), and the tower spring (1-14) is compressed or stretched, so that the two thread clamping disks (1-12) clamp the thread back and forth, so that the length of the thread head during trimming is stable; The intelligent upper thread tension adjustment device comprises an upper thread tension component (1), a sewing material thickness detection component (2) and a control component (3); The surface thread tension assembly (1) comprises a stepper motor (1-1), the optical axis of the stepper motor (1) extends into a hole at one end of a coupling (1-3) and is tightened by a tightening screw; a screw transmission rod (1-4) is sleeved in the hole at the other end of the coupling (1-3) and is tightened by a tightening screw, so that the screw transmission rod (1-4) and the stepper motor (1-1) rotate synchronously, the other end of the screw transmission rod (1-4) is connected to a screw nut of a driven member (1-5), the other end of the driven member (1-5) is fastened to a pressure rod (1-15) by a pin, the large hole on the stop pin (1-7) sheet, the clamp bracket (1-9), the clamp disc (1-12), The shield (1-13) and the tower spring (1-14) are sequentially sleeved on the pressure rod (1-15); the slender shaft of the stop pin (1-7) extends into a through hole of the clamp bracket (1-9) close to the outer side of the shaft; a reset tower spring (1-8) is sleeved on the pressure rod (1-15) between the stop pin (1-7) and the clamp bracket (1-9) so that the stop pin (1-7) is reset after being actuated; a surface line is arranged between the two clamping discs (1-12); the tower spring (1-14) is compressed under the action of the pressure rod (1-15) so that the two clamping discs (1-12) clamp the surface line to form surface line tension; the compression amount of the tower spring (1-14) is proportional to the surface line tension; The sewing material thickness detection component (2) comprises a magnetic sensing component (2-1), a mounting plate (2-2), a magnetic moving component (2-3), and a presser foot component (2-4); The magnetic induction component (2-1) is fixedly connected to one side of the mounting plate (2-2), the magnetic moving component (2-3) is arranged on the other side of the mounting plate and is fastened to the upper part of the pressure foot component (2-4), the magnetic induction component (2-1) is connected to the electric control box (3-1) of the control component (3) through a wire, and the control component (3) also includes a liquid crystal screen (3-2).

2. The method for adjusting the tension of an intelligent upper thread according to claim 1, characterized in that: A mounting plate (1-2) is sleeved on the optical axis of the stepping motor (1-1), and the mounting plate (1-2) is fixedly connected to the housing of the sewing machine.

3. The method for adjusting the tension of an intelligent upper thread according to claim 1 or 2, characterized in that: A limiting plate (1-6) is sleeved on the outer wall of the driven member (1-5) to limit the rotation of the driven member (1-5), so that the pressure rod (1-15) and the driven member (1-5) can move axially, and the limiting plate (1-6) is fixedly mounted on the sewing machine housing.

4. The method for adjusting the tension of an intelligent upper thread according to claim 3, characterized in that: The end of the pressure rod (1-15) is fastened to the limiting plate (1-6) via a pin.

5. The method for adjusting the tension of an intelligent upper thread according to claim 4, characterized in that: The coupling (1-3) is a hollow shaft with a tightening screw hole arranged on the outer wall.

6. The method for adjusting the tension of an intelligent upper thread according to claim 5, characterized in that: The structure of the wire clamp bracket (1-9) is a cylinder with a stepped central hole, a support hole is arranged on the cylindrical outer wall perpendicular to the large hole, and an axial through hole is arranged near the outer side of the cylinder.

7. The method for adjusting the tension of an intelligent upper thread according to claim 6, characterized in that: The wire clamp bracket (1-9) is fastened to the casing.

8. The method for adjusting the tension of an intelligent upper thread according to claim 7, characterized in that: The liquid crystal screen (3-2) is fixed on the casing.

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