Thread tension adjusting device and method for multiple thread trappers

Abstract

The invention relates to the technical field of sewing machines, in particular to a thread tension adjusting device for multiple thread trappers, a driving motor drives a transmission mechanism to drive an adjusting motor to linearly move along the arrangement direction of the multiple thread trappers, the adjusting motor drives a friction wheel to rotate, and a clutch drives the friction wheel to be compressed or not compressed with adjusting nuts of the thread trappers. The invention further relates to a thread tension adjusting method of the multi-thread trapper, and the thread tension adjusting method adopts the device and comprises automatic adjustment and manual adjustment. The automatic adjustment is that an adjusting motor is opposite to a certain wire clamp, a friction wheel and an adjusting nut of the friction wheel are pressed tightly, and the adjusting motor drives the friction wheel to drive the adjusting nut to rotate; the manual adjustment means that the adjusting motor is not opposite to the wire trapper to be manually adjusted, or the friction wheel is not tightly pressed with an adjusting nut of the wire trapper to be manually adjusted, and the adjusting nut is manually rotated. And automatic and high-precision adjustment of the tension of the threads of the multiple thread trappers can be realized.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, and in particular to a thread tension adjustment device for a multi-thread tensioner and a thread tension adjustment method for a multi-thread tensioner. Background Technology

[0002] The thread tensioner of a sewing machine is a key component for controlling the tension of the sewing thread. The clamping force between the two clamping plates of the thread tensioner determines the tension of the sewing thread held between them. This clamping force is provided by a spring that elastically presses against an adjusting nut and between one of the clamping plates. Traditionally, adjusting the thread tension in sewing machines relies mainly on manual operation. Rotating the adjusting nut on the thread tensioner changes the spring force, thus altering the clamping force between the two clamping plates and consequently changing the thread tension. This traditional method has several problems: First, manual adjustment is inefficient, especially when using multiple thread tensioners, requiring individual adjustment, which is time-consuming and labor-intensive; second, the accuracy of manual adjustment is affected by the operator's experience, making it difficult to guarantee consistency and easily leading to unstable sewing quality.

[0003] In existing technologies, there are two schemes for automatic adjustment of wire clamps. The first scheme uses an electromagnet drive, which requires long-term operation and is controlled by a driver to reduce tension. This leads to unstable wire tension. Furthermore, existing drivers can only control the wire clamping and unclamping states. Adjusting the clamping force between the two clamping plates still requires manually rotating the nut to adjust the spring force, making it impossible to automatically adjust the wire tension. The second scheme uses a motor to automatically control the wire tension adjustment. This method adjusts the tension by controlling the motor's swing angle or pulses to directly act on the spring of the wire clamp. The adjustment is fast and stable, but the motor needs to be continuously powered to maintain the wire tension, which is energy-intensive and requires high-performance motors. Moreover, this scheme is not suitable for adjusting multiple wire clamps simultaneously. When using multiple wire clamps, this scheme requires multiple motors to drive each clamp separately, resulting in a complex structure, high cost, and difficult installation and maintenance. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a wire tension adjustment device and method for multi-wire clamps, which can realize automated and high-precision adjustment of the wire tension of multi-wire clamps.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention provides a wire tension adjustment device for multiple wire clamps, comprising: a transmission mechanism driven by a drive motor; an adjustment motor mounted on the transmission mechanism, the transmission mechanism driving the adjustment motor to move linearly along the arrangement direction of multiple wire clamps; a friction wheel driven by the adjustment motor to rotate, the friction wheel being arranged opposite to the adjustment nut of the wire clamp; and a clutch connected to the friction wheel, the clutch driving the friction wheel to press against the adjustment nut so that the friction wheel drives the adjustment nut to rotate, or not pressing against the friction wheel so that the friction wheel does not drive the adjustment nut to rotate.

[0007] Preferably, it further includes a sliding sleeve, which is axially movable and circumferentially fixedly sleeved on the rotor shaft of the regulating motor, a friction wheel is disposed on one end of the sliding sleeve, and a clutch is connected to the sliding sleeve.

[0008] Preferably, it also includes an adjusting fork, the clutch having a push rod that can be linearly displaced along the axial direction, the push rod being arranged parallel to the sliding sleeve, one end of the adjusting fork being disposed on the push rod, and the other end being axially fixed and rotatably connected to the sliding sleeve.

[0009] Preferably, an annular groove is provided on the outer circumferential surface of the sliding sleeve, and an arc-shaped part is provided at the end of the adjusting fork away from the top rod, the arc-shaped part being rotatably embedded in the annular groove.

[0010] Preferably, the clutch is an electromagnet, a cylinder, or an electric push rod.

[0011] Preferably, it also includes a fixing plate, which is mounted on the transmission mechanism, and the adjusting motor and clutch are both mounted on the fixing plate.

[0012] Preferably, it also includes a controller, and each wire clamp is provided with a sensor for detecting the wire tension value of the wire clamp. All sensors, drive motors, adjusting motors and clutches are communicatively connected to the controller.

[0013] This invention also provides a method for adjusting the tension of multiple wire clamps, employing the wire tension adjusting device for multiple wire clamps as described above, including an automatic adjustment mode and a manual adjustment mode. In the automatic adjustment mode, a drive motor drives a transmission mechanism to move an adjusting motor to a position opposite to the wire clamp to be automatically adjusted. A clutch drives a friction wheel to press against the adjusting nut of the wire clamp to be automatically adjusted. The adjusting motor drives the friction wheel to rotate and rotates the adjusting nut. After the tension of the wire clamp to be automatically adjusted is adjusted, the clutch drives the friction wheel to depress against the adjusting nut. In the manual adjustment mode, a drive motor drives a transmission mechanism to move an adjusting motor to a position not opposite to the wire clamp to be manually adjusted, or the clutch drives the friction wheel to depress against the adjusting nut of the wire clamp to be manually adjusted, and the adjusting nut is rotated manually.

[0014] Preferably, in automatic adjustment mode, the wire tension value of each wire clamp is detected by a sensor installed on each wire clamp and the detection information is transmitted to the controller. The controller controls the rotation angle of the motor according to the detection information so that the wire tension value of the adjusted wire clamp reaches the adjustment target value.

[0015] Preferably, in automatic adjustment mode, an adjustment target value is set, the controller calculates the target angle of the adjustment motor corresponding to the adjustment target value and controls the adjustment motor to rotate from the current angle to the target angle, so that the wire tension value of the adjusted wire clamp reaches the adjustment target value.

[0016] Preferably, in automatic adjustment mode, an adjustment target value and an adjustment starting point are set. The adjustment starting point is the angle of the adjustment motor corresponding to the zero line tension value or the maximum line tension value. The controller calculates the target angle of the adjustment motor corresponding to the adjustment target value and controls the adjustment motor to rotate from the current angle to the adjustment starting point and then from the adjustment starting point to the target angle, so that the line tension value of the adjusted wire clamp reaches the adjustment target value.

[0017] Compared with the prior art, the present invention has significant progress:

[0018] This invention utilizes a drive motor that drives an adjusting motor via a transmission mechanism to perform linear motion. This allows the adjusting motor to be positioned relative to any one of multiple wire clamps. A clutch drives a friction wheel to press against the adjusting nut of the clamp opposite the adjusting motor. The adjusting motor then drives the friction wheel to rotate, causing the adjusting nut to rotate as well, thus automatically adjusting the wire tension of that clamp. After adjusting the tension of one clamp, the clutch drives the friction wheel to loosen its contact with the adjusting nut, and the process is repeated to automatically adjust the tension of the next clamp. Therefore, this invention enables automated, individual adjustment of the tension of multiple wire clamps, achieving precise, rapid, stable, and reliable automatic tension adjustment for multiple clamps. Simultaneously, the tension of the clamp can be manually adjusted by either driving the adjusting motor to a position opposite to the clamp requiring tension adjustment, or by loosening the friction wheel's contact with the adjusting nut of the clamp requiring tension adjustment. Therefore, this invention allows for simultaneous manual and automatic adjustment modes without interference. Attached Figure Description

[0019] Figure 1 This is an isometric view of the wire tension adjustment device of the multi-clamp wire clamp according to an embodiment of the present invention.

[0020] Figure 2 yes Figure 1 The left view.

[0021] Figure 3 yes Figure 2 A partial sectional view after removing the clamp.

[0022] The reference numerals in the attached figures are explained as follows:

[0023] 1. Drive motor; 2. Transmission mechanism; 21. Driving wheel; 22. Driven wheel; 23. Transmission belt; 24. Mounting base; 3. Adjusting motor; 30. Rotor shaft; 4. Friction wheel; 5. Clutch; 50. Push rod; 6. Sliding sleeve; 60. Annular groove; 61. Boss; 7. Adjusting fork; 70. Arc-shaped part; 8. Spring; 9. Fixing plate; 10. Guide rail; 100. Wire clamp; 101. Adjusting nut; 102. Wire clamp mounting plate. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0025] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device 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 on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] like Figures 1 to 3 The image shows an embodiment of the wire tension adjustment device for the multi-clamp wire clamp of the present invention.

[0029] like Figure 1 and Figure 2As shown, the wire tension adjustment device for the multi-clip clamp in this embodiment includes a drive motor 1, a transmission mechanism 2, an adjustment motor 3, a friction wheel 4, and a clutch 5. The drive motor 1 is connected to the transmission mechanism 2, and drives the transmission mechanism 2 to operate. The adjustment motor 3 is mounted on the transmission mechanism 2, and the operation of the transmission mechanism 2 drives the adjustment motor 3 to perform linear motion. The direction of the linear motion of the adjustment motor 3 is parallel to the arrangement direction of the multiple clamps 100, and the adjustment motor 3 is located on one side of the adjusting nut 101 of the multiple clamps 100. The friction wheel 4 is connected to the adjustment motor 3 and is driven to rotate by the adjustment motor 3. The friction wheel 4 is positioned opposite to the adjusting nut 101. The friction wheel 4 is preferably made of elastic rubber to enhance friction and durability. The clutch 5 is connected to the friction wheel 4, and the clutch 5 drives the friction wheel 4 to press against the adjusting nut 101 so that the friction wheel 4 drives the adjusting nut 101 to rotate, or it can be released so that the friction wheel 4 does not drive the adjusting nut 101 to rotate.

[0030] When the tension of a wire clamp 100 needs adjustment, the drive motor 1 drives the transmission mechanism 2 to operate. The transmission mechanism 2 drives the adjustment motor 3 to move to a position opposite to the wire clamp 100. Then, the clutch 5 drives the friction wheel 4 to press against the adjusting nut 101 of the wire clamp 100. The pressing friction between the friction wheel 4 and the adjusting nut 101 causes the friction wheel 4 to rotate, which in turn drives the adjusting nut 101 to rotate. The adjustment motor 3 then drives the friction wheel 4 to rotate, which in turn drives the corresponding adjusting nut 101 to rotate, thus achieving automatic adjustment of the tension of the wire clamp 100. After the tension of one wire clamp 100 is adjusted, the clutch 5 drives the friction wheel 4 to depress against the adjusting nut 101 of the wire clamp 100, and the above steps are repeated to automatically adjust the tension of the next wire clamp 100. This allows for the automatic individual adjustment of the tension of multiple wire clamps 100, achieving precise, fast, stable, and reliable automatic tension adjustment of multiple wire clamps 100.

[0031] The tension of the wire clamp 100 can be manually adjusted by driving the transmission mechanism 2 through the drive motor 1 to move the adjustment motor 3 to a position that is not opposite to the wire clamp 100 whose tension needs to be adjusted, or by driving the friction wheel 4 through the clutch 5 to not press against the adjusting nut 101 of the wire clamp 100 whose tension needs to be adjusted. Therefore, the multi-wire clamp tension adjustment device of this embodiment allows both manual and automatic adjustment modes to exist simultaneously, and the two adjustment modes do not interfere with each other.

[0032] like Figure 1As shown, in this embodiment, preferably, the transmission mechanism 2 includes a driving wheel 21, a driven wheel 22, and a transmission belt 23. The driving wheel 21 is mounted on the output shaft of the drive motor 1, and the driven wheel 22 is mounted on a fixed mounting base 24. The transmission belt 2 is fitted onto the driving wheel 21 and the driven wheel 22. The output shaft of the drive motor 1 drives the driving wheel 21 to rotate, causing the transmission belt 2 to rotate between the driving wheel 21 and the driven wheel 22. An adjusting motor 3 is mounted on one side of the transmission belt 2, thereby moving linearly between the driving wheel 21 and the driven wheel 22 along with the transmission belt 2. The transmission belt 2 is arranged parallel to the arrangement direction of the plurality of wire clamps 100.

[0033] like Figure 2 and Figure 3 As shown, preferably, the wire tension adjusting device of the multi-clamp wire tensioner in this embodiment further includes a sliding sleeve 6. The sliding sleeve 6 is axially movable and circumferentially fixedly sleeved on the rotor shaft 30 of the adjusting motor 3. The friction wheel 4 is disposed on one end of the sliding sleeve 6. When the rotor shaft 30 of the adjusting motor 3 rotates, it drives the sliding sleeve 6 to rotate synchronously, and the sliding sleeve 6 drives the friction wheel 4 to rotate. The clutch 5 is connected to the sliding sleeve 6. The clutch 5 drives the sliding sleeve 6 to generate axial displacement relative to the rotor shaft 30 of the adjusting motor 3, and the sliding sleeve 6 drives the friction wheel 4 to be pressed or not pressed against the adjusting nut 101.

[0034] Preferably, the wire tension adjusting device of the multi-clamp wire clamp in this embodiment further includes an adjusting fork 7. The clutch 5 has a push rod 50 that can be linearly displaced along the axial direction. The push rod 50 is arranged parallel to the sliding sleeve 6. One end of the adjusting fork 7 is provided on the push rod 50, and the other end of the adjusting fork 7 is axially fixed and rotatably connected to the sliding sleeve 6. The rotational engagement between the adjusting fork 7 and the sliding sleeve 6 will not interfere with the synchronous rotation of the sliding sleeve 6 driven by the rotor shaft 30 of the adjusting motor 3. When the push rod 50 of the clutch 5 produces linear displacement, the adjusting fork 7 can drive the sliding sleeve 6 to produce axial displacement relative to the rotor shaft 30 of the adjusting motor 3, thereby causing the friction wheel 4 to be pressed or not pressed against the adjusting nut 101.

[0035] Preferably, an annular groove 60 is provided on the outer circumferential surface of the sliding sleeve 6, and an arc-shaped part 70 is provided at the end of the adjusting fork 7 away from the top rod 50. The arc-shaped part 70 is rotatably embedded in the annular groove 60, thereby realizing that the end of the adjusting fork 7 away from the top rod 50 is axially fixed and rotatably connected to the sliding sleeve 6.

[0036] Preferably, the clutch 5 can be an electromagnet. When the electromagnet is energized, its push rod 50 extends, pressing the friction wheel 4 against the adjusting nut 101. When the electromagnet is de-energized, the push rod 50 remains extended, but the clamping force disappears, and the friction wheel 4 is not pressed against the adjusting nut 101. Preferably, a spring 8 can be fitted on the rotor shaft 30 of the adjusting motor 3 and the sliding sleeve 6. A boss 61 is provided on the outer circumferential surface of the sliding sleeve 6, located on the side of the annular groove 60 away from the friction wheel 4. The spring 8 is located between the adjusting motor 3 and the boss 61. When the electromagnet is de-energized, the elastic force of the spring 8 keeps the friction wheel 4 in contact with the adjusting nut 101 without clamping force. This eliminates the impact of the push rod 50's clamping force acting on the adjusting nut 101 through the friction wheel 4 when the electromagnet is energized during the next automatic adjustment of the adjusting nut 101. It also prevents the wire clamp 100 from shaking during the operation of the whole machine.

[0037] In other embodiments, the clutch 5 may also be a cylinder or an electric actuator.

[0038] Preferably, the wire tension adjusting device of the multi-clamp cable in this embodiment further includes a fixing plate 9, which is mounted on the transmission mechanism 2. The fixing plate 9 is fixedly connected to one side of the transmission belt 23 of the transmission mechanism 2. The adjusting motor 3 and the clutch 5 are both mounted on the fixing plate 9, so that they are driven by the transmission mechanism 2 to move synchronously in a straight line. Preferably, the wire tension adjusting device of the multi-clamp cable in this embodiment further includes a guide rail 10, which is arranged parallel to the transmission belt 23. The fixing plate 9 is connected to the guide rail 10 through a slider, and the slider slides with the guide rail 10, thereby guiding the linear movement of the fixing plate 9 with the transmission belt 23, so that the adjusting motor 3 and the clutch 5 move smoothly.

[0039] In this embodiment, all wire clamps 100 are mounted on the wire clamp mounting plate 102.

[0040] Preferably, the wire tension adjustment device of the multi-wire clamp in this embodiment further includes a controller. Each wire clamp 100 is provided with a sensor for detecting the wire tension value of the wire clamp 100. The sensor is a pressure sensor. All sensors, drive motor 1, adjustment motor 3 and clutch 5 are communicatively connected to the controller. During automatic adjustment, the controller controls the drive motor 1 to drive the transmission mechanism 2 to move the adjustment motor 3 to a position opposite to the wire clamp 100 whose line tension needs to be adjusted. Then, the controller controls the clutch 5 to drive the friction wheel 4 to press against the adjusting nut 101 of the wire clamp 100 whose line tension needs to be adjusted. Then, the controller controls the adjustment motor 3 to drive the friction wheel 4 to rotate, thereby driving the corresponding adjusting nut 101 to rotate and automatically adjust the line tension value of the wire clamp 100. The sensors on each wire clamp 100 monitor the line tension value of the wire clamp 100 in real time and transmit the detected line tension value information of the wire clamp 100 to the controller. The controller receives the detection information from each sensor and controls the rotation angle of the adjustment motor 3 according to the received detection information, thereby controlling the line tension value of the adjusted wire clamp 100 so that the line tension value of the adjusted wire clamp 100 reaches the adjustment target value. The adjusting motor 3 rotates one revolution, with its rotation angle varying within the range of 0-360°. The rotation angle of the adjusting motor 3 determines the magnitude of the rotation of the adjusting nut 101 driven by the friction wheel 4, which in turn determines the wire tension value of the wire clamp 100. Therefore, by adjusting the rotation angle of the adjusting motor 3 through the controller, the wire tension value of the wire clamp 100 can be automatically adjusted. Real-time monitoring and feedback of the wire tension value of the wire clamp 100 by sensors ensures precise adjustment of the wire tension value. Simultaneously, the controller can display the real-time monitored and fed-back wire tension value of the wire clamp 100 on the human-machine interface, providing the operator with a clear and intuitive view.

[0041] The sensor on the wire clamp 100 can also detect the wire tension value of the wire clamp 100 during manual adjustment and transmit the detection information to the controller. The controller automatically stores the optimal wire tension value in the current mode and displays it on the human-machine interface so that the target adjustment value can be selected during automatic adjustment.

[0042] In this embodiment, the form of the controller is not limited, and conventional controllers such as PLC controllers or microcontrollers can be used.

[0043] Based on the wire tension adjustment device for the multi-clip wire clamp of the present invention, this embodiment also provides an embodiment of the wire tension adjustment method for the multi-clip wire clamp of the present invention. The wire tension adjustment method for the multi-clip wire clamp of this embodiment uses the wire tension adjustment device for the multi-clip wire clamp described above, that is, the working method of the wire tension adjustment device for the multi-clip wire clamp described above. The wire tension adjustment method for the multi-clip wire clamp of this embodiment includes an automatic adjustment mode and a manual adjustment mode.

[0044] In automatic adjustment mode, drive motor 1 drives transmission mechanism 2 to move adjustment motor 3 to a position opposite to the clamp 100 to be automatically adjusted. Clutch 5 drives friction wheel 4 to press against the adjusting nut 101 of the clamp 100. Adjustment motor 3 drives friction wheel 4 to rotate, causing adjusting nut 101 to rotate, thereby adjusting the line tension of the clamp 100. After the line tension of the clamp 100 is adjusted, clutch 5 drives friction wheel 4 to depress the adjusting nut 101, and adjustment motor 3 stops running, thus completing the adjustment. Preferably, the controller automatically controls the operation of drive motor 1 and clutch 5, and the controller automatically controls the rotation angle of adjustment motor 3 to adjust the line tension of clamp 100 to the target value.

[0045] In manual adjustment mode, the drive motor 1 drives the transmission mechanism 2 to move the adjustment motor 3 to a position that is not opposite to the clamp 100 to be manually adjusted, or the clutch 5 drives the friction wheel 4 to not press against the adjusting nut 101 of the clamp 100 to be manually adjusted, and the adjusting nut 101 of the clamp 100 to be manually adjusted is rotated manually to adjust the line tension of the clamp 100 to be manually adjusted.

[0046] In the first embodiment of the multi-clip tension adjustment method of this example, in automatic adjustment mode, sensors installed on each clip 100 detect the tension value of the clip 100 and transmit the detection information to the controller. The controller controls the rotation angle of the adjustment motor 3 according to the detection information, so that the tension value of the clip 100 being adjusted reaches the target adjustment value. By monitoring and feeding back the tension value of the clip 100 in real time through sensors, the precise adjustment of the tension value of the clip 100 can be ensured. In this embodiment, a manual adjustment mode can be retained.

[0047] In the second embodiment of the multi-clip tension adjustment method of this example, the manual adjustment mode can be disabled, and no sensor is used to detect the tension value of the clamp 100. In the automatic adjustment mode, an adjustment target value is set, and the controller calculates the target angle of the adjustment motor 3 corresponding to the adjustment target value according to a preset calculation program. The controller controls the adjustment motor 3 to rotate from the current angle to the target angle, so that the tension value of the clamp 100 reaches the adjustment target value. The operator always selects the adjustment target value and adjusts the tension value of the clamp 100 through a human-machine interface. This embodiment is simple to adjust and avoids the influence of complex factors, especially the uncertainty of human adjustment, on the accuracy of the tension value adjustment of the clamp 100.

[0048] In the third embodiment of the multi-clip tension adjustment method of this example, the manual adjustment mode can be retained, but no sensor is set to detect the tension value of the clamp 100. In order to ensure that the uncertainty of manual adjustment does not interfere with the accurate judgment of the tension value of the clamp 100 by automatic adjustment, this embodiment first finds the zero point (adjustment starting point) before each adjustment. Specifically, in automatic adjustment mode, the adjustment target value and adjustment starting point are set. The adjustment starting point is the angle of the adjustment motor 3 corresponding to the zero tension value or the maximum tension value. The controller calculates the target angle of the adjustment motor 3 corresponding to the adjustment target value according to the preset calculation program. The controller controls the adjustment motor 3 to rotate from the current angle to the adjustment starting point and then from the adjustment starting point to the target angle, so that the tension value of the clamp 100 being adjusted reaches the adjustment target value.

[0049] In summary, the wire tension adjustment device and method for the multi-wire clamp of this embodiment have the following advantages.

[0050] (1) In actual production, when the operator selects or automatically scans and identifies a certain sewing process requirement, the tension adjustment device of the multi-thread clamp will work, and the tension of the multiple thread clamps 100 can be automatically adjusted one by one, so as to realize the precise, fast, stable and reliable automatic tension adjustment of the multi-thread clamps 100.

[0051] (2) When the operator needs to adjust the tension of a certain wire clamp 100 individually, he can manually rotate the adjusting nut 101 to make manual adjustment, or enter the human-machine interface to select the adjustment target value and make automatic adjustment. The tension value of the wire clamp 100 after adjustment in both modes will be recorded and fixed as the optimal tension value for this sewing process.

[0052] (3) The complete set of multi-thread tension adjustment device can be installed separately on existing sewing machines to complete the modification of automated thread tension adjustment of sewing machines on the market, promote the automation upgrade of the sewing industry, and improve production efficiency and product quality consistency.

[0053] (4) The entire set of multi-clip tension adjustment device can meet the tension adjustment of any number of clamps 100. The number of parts of the device will not increase as the number of clamps 100 increases. The device is simple in design, easy to install, low in cost, and highly adaptable.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A thread tension adjusting device of a multi-thread holder, characterized by, include: A transmission mechanism (2) that operates under the drive of a drive motor (1); An adjusting motor (3) is installed on the transmission mechanism (2), and the transmission mechanism (2) drives the adjusting motor (3) to move in a straight line along the arrangement direction of the multiple clamps (100); The friction wheel (4) is driven to rotate by the regulating motor (3), and the friction wheel (4) is arranged opposite to the regulating nut (101) of the wire clamp (100); A clutch (5) connected to the friction wheel (4) drives the friction wheel (4) to press against the adjusting nut (101) so that the friction wheel (4) drives the adjusting nut (101) to rotate, or does not press against the friction wheel (4) so ​​that the adjusting nut (101) does not rotate.

2. The thread tension adjustment device of the multi-thread holder according to claim 1, wherein, It also includes a sliding sleeve (6), which is axially movable and circumferentially fixedly sleeved on the rotor shaft (30) of the regulating motor (3), the friction wheel (4) is located on one end of the sliding sleeve (6), and the clutch (5) is connected to the sliding sleeve (6).

3. The thread tension adjustment device of the multi-thread holder according to claim 2, wherein, It also includes an adjusting fork (7), the clutch (5) has a push rod (50) that can be linearly displaced along the axial direction, the push rod (50) is arranged parallel to the sliding sleeve (6), one end of the adjusting fork (7) is provided on the push rod (50), and the other end is fixed to the sliding sleeve (6) along the axial direction and rotatably connected in the circumferential direction.

4. The thread tension adjustment device of the multi-thread holder according to claim 3, wherein, The outer circumferential surface of the sliding sleeve (6) is provided with an annular groove (60) along the circumferential direction. The end of the adjusting fork (7) away from the top rod (50) is provided with an arc-shaped part (70), and the arc-shaped part (70) is rotatably embedded in the annular groove (60).

5. The thread tension adjustment device of the multi-thread holder according to claim 3, wherein, The clutch (5) is an electromagnet, a cylinder, or an electric push rod.

6. The multi-threader thread tension adjustment device of claim 1, wherein, It also includes a fixing plate (9), which is mounted on the transmission mechanism (2), and the adjusting motor (3) and the clutch (5) are both mounted on the fixing plate (9).

7. The thread tension adjustment device of the multi-thread holder according to claim 1, wherein It also includes a controller, and each of the wire clamps (100) is provided with a sensor for detecting the wire tension value of the wire clamp (100). All the sensors, the drive motor (1), the adjustment motor (3) and the clutch (5) are communicatively connected to the controller.

8. A thread tension adjustment method for a multi-threader, characterized by, A wire tension adjustment device employing a multi-clamp as described in any one of claims 1 to 7, comprising an automatic adjustment mode and a manual adjustment mode; In automatic adjustment mode, the drive motor (1) drives the transmission mechanism (2) to move the adjustment motor (3) to a position opposite to the clamp (100) to be automatically adjusted. The clutch (5) drives the friction wheel (4) to press against the adjusting nut (101) of the clamp (100) to be automatically adjusted. The adjustment motor (3) drives the friction wheel (4) to rotate and drives the adjusting nut (101) to rotate. After the line tension of the clamp (100) to be automatically adjusted is adjusted, the clutch (5) drives the friction wheel (4) to not press against the adjusting nut (101). In the manual adjustment mode, the driving motor (1) drives the transmission mechanism (2) to drive the adjusting motor (3) to a position opposite to the thread tensioner (100) to be manually adjusted, or the clutch (5) drives the friction wheel (4) to be not pressed against the adjusting nut (101) of the thread tensioner (100) to be manually adjusted, and the adjusting nut (101) is manually rotated.

9. The multi-threader thread tension adjustment method of claim 8, wherein, In the automatic adjustment mode, a sensor provided on each thread tensioner (100) detects the thread tension value of the thread tensioner (100) and transmits the detection information to the controller, and the controller controls the rotation angle of the adjusting motor (3) according to the detection information, so that the thread tension value of the adjusted thread tensioner (100) reaches the adjustment target value.

10. The multi-threader thread tension adjustment method of claim 8, wherein, In the automatic adjustment mode, the adjustment target value is set, the controller calculates the target angle of the adjusting motor (3) corresponding to the adjustment target value, and controls the adjusting motor (3) to rotate from the current angle to the target angle, so that the thread tension value of the adjusted thread tensioner (100) reaches the adjustment target value.

11. The multi-threader thread tension adjustment method of claim 8, wherein, In the automatic adjustment mode, the adjustment target value and the adjustment starting point are set, the adjustment starting point is the angle of the adjusting motor (3) corresponding to the zero thread tension value or the maximum thread tension value, the controller calculates the target angle of the adjusting motor (3) corresponding to the adjustment target value, and controls the adjusting motor (3) to rotate from the current angle to the adjustment starting point and then from the adjustment starting point to the target angle, so that the thread tension value of the adjusted thread tensioner (100) reaches the adjustment target value.

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