Line tension adjustment device

Abstract

The present application relates to sewing technical field, especially a kind of thread tension adjusting device, comprising: thread clamping mechanism, including mounting block and the first thread clamping piece and second thread clamping piece movably arranged on the mounting block, the first thread clamping piece is oppositely arranged with the second thread clamping piece and has the gap for accommodating suture;Driving mechanism, including rotating member, transmission assembly and pressure cylinder, one end of the transmission assembly is connected with the rotating member, the other end is connected with the pressure cylinder, the side of the pressure cylinder close to the transmission assembly is abutted with the second thread clamping piece, by driving the rotating member rotates, can make the transmission assembly drive the pressure cylinder moves, to make the second thread clamping piece relatively the first thread clamping piece moves. Only need to control the rotation angle of rotating member can control the gap size between two thread clamping pieces, in turn change the size of thread tension, the whole process can be adjusted thread tension in real time during sewing machine sewing process, adjustment is simple and convenient, higher accuracy.

Description

Technical Field

[0001] This invention relates to the field of sewing technology, and more particularly to a thread tension adjustment device. Background Technology

[0002] Currently, the commonly used thread tension adjustment devices for sewing machines are basically similar. The force on the device is provided by the spring force, mainly in the following two types: One type of thread tension stabilizing device uses a push method. Under normal conditions, the spring is in a compressed state, and the device holds the thread tension on the sewing thread. When it is necessary to release the tension, the electromagnet is energized and closes, pushing the top rod to compress the spring again, causing the spring to separate from the thread clamping plate, and the held thread tension disappears, thereby controlling the thread tension of the sewing material. The other type of thread tension stabilizing device is exactly the opposite, using a pull method. The electromagnet closes and pulls the pressure block to tighten the thread clamping plate, holding the thread tension. After the power is cut off, the spring force will spring the pressure block open to achieve the purpose of loosening the thread.

[0003] Both of these devices have the following drawbacks: 1. The thread tension cannot be specifically calculated and reflected; 2. The thread tension can only be mechanically adjusted, which is troublesome and inaccurate, requiring certain operating experience; 3. Furthermore, the thread tension is not adjustable during machine operation, which is incompatible with the subsequent thread tension monitoring and adjustment system; 4. Excessive compression of the spring causes it to gradually fail, resulting in unstable thread tension and poor sewing effect. Summary of the Invention

[0004] The purpose of this invention is to provide a thread tension adjusting device, which at least solves one of the technical problems existing in the existing thread tension adjusting devices for sewing machines.

[0005] To achieve the above objectives, the present invention provides a line tension adjusting device, comprising:

[0006] The thread clamping mechanism includes a mounting block and a first thread clamping piece and a second thread clamping piece movably disposed on the mounting block, the first thread clamping piece and the second thread clamping piece being disposed opposite to each other and having a gap for accommodating the thread;

[0007] The driving mechanism includes a rotating component, a transmission assembly, and a pressure cylinder. One end of the transmission assembly is connected to the rotating component, and the other end is connected to the pressure cylinder. The side of the pressure cylinder closest to the transmission assembly abuts against the second wire clamping piece. By driving the rotating component to rotate, the transmission assembly can drive the pressure cylinder to move, so that the second wire clamping piece moves relative to the first wire clamping piece.

[0008] Optionally, the transmission assembly includes a movable cylinder, an elastic element, a transmission rod, and a moving rod. The movable cylinder is movably disposed within the housing of the sewing machine. Both ends of the transmission rod are rotatably connected to the rotating component and the movable cylinder, respectively. The elastic element is disposed within the movable cylinder and is connected at one end to the movable cylinder. One end of the moving rod extends into the movable cylinder and is connected to the other end of the elastic element. The other end of the moving rod is connected to the pressure cylinder.

[0009] Optionally, the elastic element is a spring, which is installed inside the movable cylinder via a washer.

[0010] Optionally, the drive mechanism further includes a drive source, and the rotating component is mounted on the drive shaft of the drive source.

[0011] Optionally, the wire tension adjustment device further includes a control unit, which is communicatively connected to the drive source. The control unit is used to send a signal to the drive source according to the wire tension requirement to control the rotation angle of the rotating component, thereby controlling the gap between the first clamping plate and the second clamping plate.

[0012] Optionally, the drive mechanism further includes a mounting base, which is installed inside the housing of the sewing machine. The drive source is mounted on the mounting base, and the mounting base is provided with a limiting hole. The transmission rod passes through the limiting hole axially.

[0013] Optionally, the rotating component is a crank.

[0014] Optionally, the wire clamping mechanism further includes an adjusting member disposed on the mounting block. The position of the adjusting member on the mounting block is adjustable, and the adjusting member abuts against the side of the first wire clamping piece away from the second wire clamping piece.

[0015] Optionally, the wire clamping mechanism further includes a wire take-up spring, which is disposed within the mounting block and partially located between the first wire clamp and the second wire clamp.

[0016] Optionally, the line tension adjusting device further includes a dust cover, which is installed outside the pressure cylinder.

[0017] The line tension adjusting device provided by the present invention has at least one of the following beneficial effects:

[0018] 1) The entire process only requires controlling the rotation angle of the rotating component to control the tightness between the two thread clamps, thereby changing the thread tension. The thread tension can be adjusted in real time during the sewing process of the sewing machine. The adjustment is simple and convenient, and the accuracy is higher.

[0019] 2) The entire force transmission path of the transmission component is clearly designed. Due to the presence of the elastic element, the transmission and change of force on the entire force transmission path are smoother, which can further improve the movement accuracy of the second clamping piece.

[0020] 3) By setting the drive source to drive the rotating component, and then cooperating with the control unit to send a signal to the drive source according to the line tension requirement to control the rotation angle of the rotating component, thereby controlling the gap between the first clamping plate and the second clamping plate, the accuracy is higher than that of manual operation, and it is also more time-saving, labor-saving, and highly automated. Attached Figure Description

[0021] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention. Wherein:

[0022] Figure 1 This is an overall schematic diagram of a line tension adjusting device provided in an embodiment of the present invention;

[0023] Figure 2 This is an exploded view of a line tension adjusting device provided in an embodiment of the present invention;

[0024] Figure 3 This is a partial cross-sectional view of a line tension adjusting device provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a wire clamping mechanism provided in an embodiment of the present invention.

[0026] in:

[0027] 100-Wire clamping mechanism; 101-Mounting block; 102-First wire clamping plate; 103-Second wire clamping plate; 104-Adjusting component; 105-Wire take-up spring; 200-Drive mechanism; 201-Rotating component; 202-Pressure cylinder; 203-Moving cylinder; 204-Elastic component; 205-Transmission rod; 206-Moving rod; 207-Drive source; 208-Mounting base; 209-Limiting hole; 300-Dust cover. Detailed Implementation

[0028] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clarify the illustration of the embodiments of this invention, and are not intended to limit the conditions for implementing this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0029] It should also be understood that, unless otherwise specified or indicated, the terms "first," "second," "third," etc., in the specification are used only to distinguish the various components, elements, steps, etc., in the specification, and not to indicate the logical or sequential relationships between the various components, elements, steps, etc. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise limited, an element defined by the phrase "comprising one…" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0030] Please refer to Figures 1-4 This embodiment provides a line tension adjusting device, including:

[0031] The thread clamping mechanism 100 includes a mounting block 101 and a first thread clamping piece 102 and a second thread clamping piece 103 movably disposed on the mounting block 101. The first thread clamping piece 102 and the second thread clamping piece 103 are disposed opposite to each other and have a gap for accommodating the sewing thread.

[0032] The drive mechanism 200 includes a rotating member 201, a transmission assembly, and a pressure cylinder 202. One end of the transmission assembly is connected to the rotating member 201, and the other end is connected to the pressure cylinder 202. The side of the pressure cylinder 202 closest to the transmission assembly abuts against the second clamping piece 103. By driving the rotating member 201 to rotate, the transmission assembly can drive the pressure cylinder 202 to move, so that the second clamping piece 103 moves relative to the first clamping piece 102.

[0033] By driving the rotating component 201 to rotate, the pressure cylinder 202 can be moved. The pressure cylinder 202 moves and squeezes the second thread clamping plate 103, causing the second thread clamping plate 103 to move relative to the first thread clamping plate 102. This changes the gap between the first thread clamping plate 102 and the second thread clamping plate 103, thereby adjusting the thread tension. The entire process only requires controlling the rotation angle of the rotating component 201 to control the tightness between the two thread clamping plates, thus changing the thread tension. The thread tension adjusting device designed in this invention can adjust the thread tension in real time during the sewing process of the sewing machine. The adjustment is simple and convenient, and the accuracy is higher.

[0034] In this embodiment, the transmission assembly includes a movable cylinder 203, an elastic element 204, a transmission rod 205, and a moving rod 206. The movable cylinder 203 is movably disposed inside the housing of the sewing machine (not shown in the figure). The two ends of the transmission rod 205 are rotatably connected to the rotating element 201 and the movable cylinder 203, respectively. The elastic element 204 is disposed inside the movable cylinder 203 and one end is connected to the movable cylinder 203. One end of the moving rod 206 extends into the movable cylinder 203 and is connected to the other end of the elastic element 204. The other end of the moving rod 206 is connected to the pressure cylinder 202.

[0035] Combination Figure 3 Taking the clockwise rotation of rotating component 201 (viewed from top to bottom) as an example, the force transmission path of the entire transmission assembly is as follows:

[0036] The rotating component 201 rotates clockwise - the transmission rod 205 swings - the moving cylinder 203 moves to the left - the elastic component 204 is compressed - the moving rod 206 moves to the left - the pressure cylinder 202 moves to the left - the second clamping plate 103 moves to the left - the seam is clamped. As can be seen, the entire force transmission path is clear and straightforward, and due to the presence of the elastic component 204, the transmission and change of force along the entire path are smoother, further improving the movement accuracy of the second clamping plate 103.

[0037] It is important to understand that when the rotating part 201 rotates counterclockwise, the pressure cylinder 202 moves to the right, which is equivalent to releasing the pressure applied to the second clamping piece 103, making the first clamping piece 102 and the second clamping piece 103 looser, and the tension applied to the sewing thread becomes smaller.

[0038] Preferably, the elastic element 204 is a spring, which is installed inside the movable cylinder 203 via a washer.

[0039] Preferably, the drive mechanism 200 further includes a drive source 207, and the rotating component 201 is mounted on the drive shaft of the drive source 207. By setting the drive source 207 to drive the rotating component 201, the accuracy is higher than that of manual operation, and it is also more time-saving, labor-saving, and highly automated.

[0040] In this embodiment, the driving source 207 includes, but is not limited to, a motor.

[0041] Preferably, the wire tension adjustment device further includes a control unit, which is communicatively connected to the drive source 207. The control unit is used to send a signal to the drive source 207 according to the wire tension requirement to control the rotation angle of the rotating member 201, thereby controlling the gap between the first wire clamping piece 102 and the second wire clamping piece 103.

[0042] It is important to understand that different fabrics, different thread sizes, and different sewing speeds may require different thread tensions. In this case, the control unit can send a signal to the drive source 207 in real time according to the thread tension requirements to control the rotation angle of the rotating part 201, thereby adjusting the thread tension.

[0043] In this embodiment, the control unit includes, but is not limited to, control components such as PLCs and circuit boards in the prior art, which will not be described in detail here.

[0044] In this embodiment, the drive mechanism 200 further includes a mounting base 208, which is installed inside the sewing machine housing. The drive source 207 is mounted on the mounting base 208, and a limiting hole 209 is provided on the mounting base 208. The transmission rod 205 passes through the limiting hole 209 axially. Since both ends of the transmission rod 205 are rotatably connected to the rotating component 201 and the moving cylinder 203 respectively, the limiting hole 209 on the mounting base 208 can limit the swing range of the transmission rod 205, thereby limiting the displacement of the moving cylinder 203 and preventing the rotation angle of the rotating component 201 from being too large.

[0045] In this embodiment, the rotating component 201 is a crank.

[0046] Preferably, the wire clamping mechanism 100 further includes an adjusting member 104 disposed on the mounting block 101. The position of the adjusting member 104 on the mounting block 101 is adjustable, and the adjusting member 104 abuts against the side of the first wire clamping piece 102 opposite to the second wire clamping piece 103. In this embodiment, the mounting block 101 has a central shaft, and the adjusting member 104, the first wire clamping piece 102, and the second wire clamping piece 103 are all sleeved on the central shaft. The adjusting member 104 has a threaded hole. When the fastener (bolt or screw, etc.) in the threaded hole is loosened, the adjusting member 104 can be directly driven to slide on the central shaft, thereby changing the initial position of the first wire clamping piece 102. When the first wire clamping piece 102 is adjusted to the correct position, the fastener is tightened to lock the adjusting member 104 onto the central shaft.

[0047] Preferably, the wire clamping mechanism 100 further includes a wire take-up spring 105, which is disposed within the mounting block 101 and partially located between the first wire clamp and the second wire clamp.

[0048] Preferably, the line tension adjusting device further includes a dust cover 300, which is installed outside the pressure cylinder 202.

[0049] In summary, this invention provides a thread tension adjusting device. By driving the rotating component 201 to rotate, the pressure cylinder 202 can be moved. The moving pressure cylinder 202 compresses the second thread clamping plate 103, causing the second thread clamping plate 103 to move relative to the first thread clamping plate 102. This changes the gap between the first thread clamping plate 102 and the second thread clamping plate 103, thereby achieving thread tension adjustment. The entire process only requires controlling the rotation angle of the rotating component 201 to control the tightness between the two thread clamping plates, thus changing the magnitude of the thread tension. The thread tension adjusting device designed in this invention can adjust the thread tension in real time during sewing, making adjustment simple, convenient, and more accurate.

[0050] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A thread tension regulating device, characterized by, The application relates to a thread tension adjusting device of a sewing machine. The thread tension adjusting device comprises a thread clamping mechanism and a driving mechanism. The thread clamping mechanism comprises a mounting block, a first thread clamping piece and a second thread clamping piece movably arranged on the mounting block, and the first thread clamping piece is oppositely arranged with the second thread clamping piece and has a gap for accommodating a sewing thread. The driving mechanism comprises a rotating piece, a transmission assembly and a pressing cylinder. One end of the transmission assembly is connected with the rotating piece, and the other end is connected with the pressing cylinder.

2. The thread tension regulating device according to claim 1, wherein The pressing cylinder is abutted against one side of the transmission assembly close to the second thread clamping piece.

3. The thread tension regulating device of claim 1, wherein, The rotating piece can drive the transmission assembly to move the pressing cylinder to move the second thread clamping piece relative to the first thread clamping piece.

4. The thread tension regulating device of claim 3, wherein The transmission assembly comprises a moving cylinder, an elastic piece, a transmission rod and a moving rod.

5. The thread tension regulating device of claim 3, wherein The moving cylinder is movably arranged in a housing of the sewing machine.

6. The thread tension regulating device of claim 1, wherein, The two ends of the transmission rod are respectively rotatably connected with the rotating piece and the moving cylinder.

7. The thread tension regulating device of claim 1, wherein The elastic piece is arranged in the moving cylinder and connected with the moving cylinder at one end.

8. The thread tension regulating device of claim 1, wherein, The moving rod is connected with the elastic piece at the other end. The elastic piece is a spring. The spring is installed in the moving cylinder through a gasket. The driving mechanism further comprises a driving source. The rotating piece is installed on a driving shaft of the driving source. The thread tension adjusting device further comprises a control unit. The control unit is communicatively connected with the driving source. The control unit is used for sending a signal to the driving source according to a thread tension requirement to control a rotating angle of the rotating piece, and further control a gap between the first thread clamping piece and the second thread clamping piece. The driving mechanism further comprises a mounting seat. The mounting seat is installed in the housing of the sewing machine. The driving source is installed on the mounting seat. The mounting seat is provided with a limiting hole. The transmission rod penetrates the limiting hole in an axial direction. The rotating piece is a crank. The thread clamping mechanism further comprises a thread tension spring. The thread tension spring is arranged in the mounting block and partially located between the first thread clamping piece and the second thread clamping piece. The thread tension adjusting device further comprises a dust cover. The dust cover covers the pressing cylinder.

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