Automatic thread tension regulating device for garment sewing

Abstract

The utility model provides a kind of clothing sewing thread tension automatic regulating device, it is related to sewing tensioning equipment field, including support assembly, transmission roller mechanism and tensioning assembly;Transmission roller mechanism is installed on support assembly, transmission roller mechanism includes fixed rotating component and movable rotating component, fixed rotating component includes different first fixed roller and second fixed roller;Movable rotating component is set on support assembly, and along support assembly lifting movement;Tensioning assembly is installed on support assembly and is movably connected with movable rotating component;Tensioning assembly drives movable rotating component to lift on support assembly.By the movement track constraint of arc sliding groove to the movable end of guide plate, and the guidance of strip sliding groove to connecting rod lifting movement, tensioning assembly and movable rotating component form space linkage mechanism, realize when sewing thread relaxation automatic compensation tension, when sewing thread tightness buffering and store elastic potential energy, always keep sewing thread in set tension range stable operation.

Description

Technical Field

[0001] This utility model relates to the field of sewing tensioning equipment technology, and more specifically, to an automatic tension adjustment device for garment sewing thread. Background Technology

[0002] In textile, sewing, and thread processing equipment, the tension stability of sewing thread is one of the key factors affecting product quality and processing efficiency. Existing technologies often use spring tensioning wheels, counterweight tensioning mechanisms, or pneumatic tensioning devices to control the tension of the thread, but these structures generally suffer from problems such as slow response, limited adjustment range, or complex structure.

[0003] Especially during the operation of the sewing thread, changes in thread feeding speed, fluctuations in material elasticity, or equipment vibration can easily cause the thread to become momentarily loose or too tight, affecting the uniformity of the stitches and even causing thread breakage. Traditional single-roller tensioning devices often struggle to compensate for rapid tension and are prone to impacts during sudden tension changes, affecting system stability.

[0004] Therefore, there is an urgent need in the existing technology for a multi-stage linkage tensioning mechanism that is responsive and can automatically adapt to changes in wire tension in order to improve the stability and reliability of wire conveying. Utility Model Content

[0005] Based on this, in order to solve the technical problems mentioned above, the present invention provides an automatic tension adjustment device for garment sewing threads, the specific technical solution of which is as follows: An automatic tension adjustment device for garment sewing thread includes a support assembly, a transmission roller mechanism, and a tensioning assembly; The transmission roller mechanism is mounted on the bracket assembly. The transmission roller mechanism includes a fixed rotating assembly and a movable rotating assembly. The fixed rotating assembly includes a first fixed roller and a second fixed roller with different heights. The movable rotating component is movably mounted on the support assembly, and the movable rotating component moves up and down along the support assembly; The tensioning component is mounted on the support assembly and is movably connected to the movable rotating component; the tensioning component drives the movable rotating component to lift on the support assembly.

[0006] Furthermore, the support assembly includes a base and a first arch frame, a second arch frame, and a third arch frame arranged at intervals along the length of the base; The first arch frame, the second arch frame, and the third arch frame each include two arch beams, and the two arch beams of each arch frame are respectively arranged in the shape of square columns on both sides of the width direction of the base; The two ends of the first fixed roller are rotatably connected to the first arch frame, and the two ends of the second fixed roller are rotatably connected to the third arch frame. When the sewing thread is slack, the movable rotating assembly can be driven to lift.

[0007] Furthermore, the two arch beams of the second arch frame are symmetrically provided with strip-shaped sliding grooves and arc-shaped sliding grooves; The two ends of the movable rotating component are set in the strip sliding groove and can slide along it; One end of the tensioning component slides into the arc-shaped sliding groove, while the other end is hinged to the third arch frame.

[0008] Furthermore, the strip sliding groove and the arc-shaped sliding groove are staggered in the height direction, and the strip sliding groove is located directly above the arc-shaped sliding groove; the height of any position of the strip sliding groove in the vertical plane is higher than the height of the second fixed roller.

[0009] Furthermore, the movable rotating assembly includes a connecting rod, a sleeve, a guide block, and a spring; Both ends of the connecting rod are set inside the strip-shaped sliding groove; The sleeve is fitted onto the connecting rod and can rotate relative to it; The guide block is fixed to the end of the connecting rod, and a telescopic hole is provided on the side facing the tensioning assembly; One end of the sliding rod is slidably inserted into the telescopic hole, and the spring is located inside the telescopic hole, with its two ends connected to the inner wall of the telescopic hole and the sliding rod, respectively.

[0010] Furthermore, the tensioning assembly includes a fixed plate, a guide plate, and an elastic element; One end of the fixing plate is fixed to the second arch frame, and the other end is fixedly connected to the third arch frame; One end of the guide plate is hinged to the end of the fixed plate facing the third arch frame, and the other end has a movable part on its side, which slides in conjunction with the arc-shaped sliding groove. The two ends of the elastic element are connected to the guide plate and the fixed plate respectively, and the angle between the guide plate and the fixed plate forms an acute angle.

[0011] Furthermore, a sliding track is provided on the side of the guide plate facing away from the fixed plate, and the end of the sliding rod away from the telescopic hole contacts the sliding track.

[0012] Furthermore, the elastic coefficient of the elastic element is greater than the elastic coefficient of the spring in the movable rotating assembly.

[0013] Furthermore, the winding path of the sewing thread successively passes around the movable end of the tensioning assembly, the first fixed roller, the sleeve of the movable rotating assembly, and the second fixed roller.

[0014] Furthermore, in the vertical plane, the height of the first fixed roller is lower than the height of the second fixed roller, and the height of the fixed plate is lower than the height of the second fixed roller.

[0015] The beneficial effects of this solution are as follows: by constraining the motion trajectory of the movable end of the guide plate through the arc-shaped sliding groove, and guiding the lifting and lowering motion of the connecting rod through the strip-shaped sliding groove, the tensioning component and the movable rotating component form a spatial linkage mechanism, which can simultaneously tension the slack sewing thread, thereby achieving rapid compensation for the tension of the sewing thread. Furthermore, due to the setting of the spring, it will not be subjected to a large impact force when the tension changes abruptly, because the spring buffers and stores elastic potential energy when the sewing thread is taut, and always keeps the sewing thread running stably within the set tension range. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an automatic tension adjustment device for garment sewing thread according to this utility model; Figure 2 This is a side view of an automatic tension adjustment device for garment sewing thread according to this utility model; Figure 3 yes Figure 2 A cross-sectional view at point AA along the middle section; Figure 4 This is a side view of an automatic tension adjustment device for garment sewing thread according to the present invention (showing the winding method of the sewing thread).

[0017] Explanation of reference numerals in the attached figures: 1-Support assembly; 11-Base; 12-First arch frame; 13-Second arch frame; 131-Arc-shaped sliding groove; 132-Strip-shaped sliding groove; 14-Third arch frame; 2-Transmission roller mechanism; 21-Fixed rotating assembly; 211-First fixed roller; 212-Second fixed roller; 22-Modible rotating assembly; 221-Connecting rod; 222-Sleeve; 223-Guide block; 224-Sliding rod; 225-Spring; 3-Tensioning assembly; 31-Guide plate; 311-Sliding track; 32-Fixed plate; 33-Elastic element; 100-Sewing thread. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish the names.

[0022] See appendix Figure 1-4 An automatic tension adjustment device for garment sewing thread includes a support assembly 1, a transmission roller mechanism 2, and a tensioning assembly 3. The support assembly 1 includes a base 11, a first arch frame 12, a second arch frame 13, and a third arch frame 14. See appendix Figure 1 Each of the first arch frame 12, the second arch frame 13, and the third arch frame 14 includes two arch beams. The two arch beams of each arch frame are respectively arranged in the shape of square columns on both sides of the base 11 in the width direction. The first arch frame 12, the second arch frame 13, and the third arch frame 14 are arranged at intervals on the base 11 along the length direction of the base 11. The two arch beams of the second arch frame 13 are symmetrically provided with arc-shaped sliding grooves 131 and strip-shaped sliding grooves 132. The arc-shaped sliding grooves 131 and strip-shaped sliding grooves 132 are staggered in the height direction, with the strip-shaped sliding groove 132 located directly above the arc-shaped sliding groove 131. The outer arc of the arc-shaped sliding groove 131 faces the first arch frame 12, and the inner arc of the arc-shaped sliding groove 131 faces the third arch frame 14.

[0023] The transmission roller mechanism 2 includes a fixed rotating assembly 21 and a movable rotating assembly 22. The fixed rotating assembly 21 includes a first fixed roller 211 and a second fixed roller 212. The two ends of the first fixed roller 211 are rotatably connected to the two arch beams of the first arch frame 12, and the two ends of the second fixed roller 212 are rotatably connected to the two arch beams of the third arch frame 14. In the vertical plane, the height of the first fixed roller 211 is lower than the height of the second fixed roller 212. The height of any position of the strip sliding groove 132 is higher than the height of the second fixed roller 212 in the vertical plane.

[0024] The movable rotating component 22 is installed on the second arch frame 13. The movable rotating component 22 is movably connected to the second arch frame 13 and the tensioning component 3 respectively. The two ends of the movable rotating component 22 move up and down along the strip sliding groove 132.

[0025] The movable rotating assembly 22 includes a connecting rod 221, a sleeve 222, a guide block 223, and a sliding rod 224. The two ends of the connecting rod 221 are respectively disposed within strip-shaped sliding grooves 132 on the two arch beams of the second arch frame 13, and the connecting rod 221 moves along the strip-shaped sliding grooves 132. The sleeve 222 is fitted onto the connecting rod 221 and can rotate relative to the connecting rod 221. Two guide blocks 223 are symmetrically disposed at both ends of the connecting rod 221 and are integrally formed with the connecting rod 221. A cylindrical telescopic hole is formed on the side of the guide block 223 facing the base 11, and one end of the sliding rod 224 is slidably inserted into the telescopic hole. A spring 225 is provided inside the telescopic hole, and the two ends of the spring 225 are fixedly connected to the inner wall of the telescopic hole and the sliding rod 224, respectively.

[0026] Since the height of the strip sliding groove 132 in the vertical plane is always higher than that of the second fixed roller 212, and the connecting rod 221 is constrained to move within the strip sliding groove 132, the movement trajectories of the connecting rod 221, sleeve 222 and guide block 223 are always above the second fixed roller 212 in the vertical plane.

[0027] The tensioning assembly 3 includes a guide plate 31, a fixed plate 32, and an elastic element 33. The fixed plate 32 is square-shaped, with a hinged end and a fixed end at its two ends. The fixed end is fixedly connected to the second arch frame 13, and the hinged end is connected to the arch beam of the third arch frame 14. In the vertical plane, the height of the fixed plate 32 is lower than the height of the second fixed roller 212.

[0028] The guide plate 31 has a movable end and a rotating end at its two ends. The rotating end is hinged to the hinge end of the fixed plate 32. The movable end has movable parts protruding from both sides, which slide along the arc-shaped sliding groove 131. That is, when the guide plate 31 rotates around the hinge, the movable end of the guide plate 31 will slide adaptively along the arc-shaped sliding groove 131.

[0029] Two sliding tracks 311, corresponding to the sliding rod 224, are provided on the side of the guide plate 31 facing away from the fixed plate 32. When the guide plate 31 rotates around the hinge, its sliding tracks 311 push the sliding rod 224, causing the sliding rod 224 to produce axial displacement. The two ends of the elastic element 33 are fixedly connected to the guide plate 31 and the fixed plate 32 respectively, so that the guide plate 31 and the fixed plate 32 form an angle, which is always an acute angle. The elastic coefficient of the elastic element 33 is greater than that of the spring 225, so that when the movable rotating component 22 is naturally pressed against the guide plate 31 by gravity, the guide plate 31 will rotate towards the fixed plate 32 at the hinge point, thereby pressing the elastic element 33 and putting the elastic element 33 in a compressed state. This is the first state, that is, the natural compression state.

[0030] like Figure 4As shown, the sewing thread 100 is wound in the following order: the movable end of the guide plate 31, the first fixed roller 211, the sleeve 222, and the second fixed roller 212.

[0031] When the sewing thread 100 is taut, the movable end of the guide plate 31 is pressed by the sewing thread 100 and moves toward the fixed plate 32, causing the elastic element 33 to be further compressed. At the same time, the sewing thread 100 wraps around the sleeve 222 and presses the sleeve 222 to move toward the base 11 (guide plate 31) along the strip sliding groove 132, causing the elastic element 33 to be further compressed. Since the elastic coefficient of the elastic element 33 is larger than that of the spring 225, the deformation of the elastic element 33 is smaller than that of the spring 225.

[0032] When the sewing thread 100 is slack, the holding force of the sewing thread 100 on the guide plate 31 is weakened. Under the action of the elastic force of the elastic element 33, the guide plate 31 rotates outward around the hinge end (that is, in the opposite direction to the movement towards the fixed plate 32), so that its movable end moves away from the fixed plate 32 along the arc-shaped sliding groove 131, thereby tightening the slack sewing thread 100 again. At the same time, as the guide plate 31 rotates outward, it pushes the sliding rod 224 through its sliding track 311, causing the sliding rod 224 to retract into the telescopic hole against the force of the spring 225, and driving the connecting rod 221 to move away from the base 11 along the strip sliding groove 132, thereby raising the height position of the sleeve 222 to further compensate for the slack of the sewing thread 100 and achieve multi-level coordinated tensioning; The elastic coefficient of the elastic element 33 is greater than that of the spring 225, ensuring that when the tension of the sewing thread 100 changes, the movement of the guide plate 31 is dominant and the movement of the movable rotating component 22 is a passive compensation, thereby maintaining the stability and coordinated response of the tensioning process. By constraining the movement trajectory of the movable end of the guide plate 31 through the arc-shaped sliding groove 131 and guiding the lifting and lowering movement of the connecting rod 221 through the strip-shaped sliding groove 132, the tensioning component 3 and the movable rotating component 22 form a spatial linkage mechanism, which realizes automatic compensation of tension when the sewing thread 100 is slack, buffering and storing elastic potential energy when the sewing thread 100 is taut, and always keeping the sewing thread 100 running stably within the set tension range.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic tension adjustment device for garment sewing thread, characterized in that, It includes a support assembly (1), a transmission roller mechanism (2), and a tensioning assembly (3); The transmission roller mechanism (2) is mounted on the bracket assembly (1). The transmission roller mechanism (2) includes a fixed rotating assembly (21) and a movable rotating assembly (22). The fixed rotating assembly (21) includes a first fixed roller (211) and a second fixed roller (212) with different heights. The movable rotating component (22) is movably mounted on the support assembly (1), and the movable rotating component (22) moves up and down along the support assembly (1); The tensioning component (3) is mounted on the bracket assembly (1) and is movably connected to the movable rotating component (22), and drives the movable rotating component to lift when the sewing thread is slack.

2. The automatic tension adjustment device for garment sewing thread according to claim 1, characterized in that, The support assembly (1) includes a base (11) and a first arch frame (12), a second arch frame (13) and a third arch frame (14) arranged at intervals along the length of the base (11). The first arch frame (12), the second arch frame (13) and the third arch frame (14) each include two arch beams, and the two arch beams of each arch frame are respectively arranged in the shape of square columns on both sides of the width direction of the base (11); The two ends of the first fixed roller (211) are rotatably connected to the first arch frame (12), and the two ends of the second fixed roller (212) are rotatably connected to the third arch frame (14); the movable rotating assembly (22) and the tensioning assembly (3) are movably mounted on the second arch frame (13).

3. The automatic tension adjustment device for garment sewing threads according to claim 2, characterized in that, The two arch beams of the second arch frame (13) are symmetrically provided with strip sliding grooves (132) and arc sliding grooves (131). The two ends of the movable rotating component (22) are set in the strip sliding groove (132) and can slide along it; One end of the tensioning component (3) is slidably engaged with the arc-shaped sliding groove (131), and the other end is hinged to the third arch frame (14).

4. The automatic tension adjustment device for garment sewing thread according to claim 3, characterized in that, The strip sliding groove (132) and the arc sliding groove (131) are staggered in the height direction, and the strip sliding groove (132) is located directly above the arc sliding groove (131) vertically; the height of any position of the strip sliding groove (132) in the vertical plane is higher than the height of the second fixed roller (212).

5. The automatic tension adjustment device for garment sewing thread according to claim 3, characterized in that, The movable rotating assembly (22) includes a connecting rod (221), a sleeve (222), a guide block (223), and a spring (225); Both ends of the connecting rod (221) are set in the strip-shaped sliding groove (132); The sleeve (222) is fitted onto the connecting rod (221) and can rotate relative to it; The guide block (223) is fixed to the end of the connecting rod (221), and a telescopic hole is provided on the side facing the tensioning assembly (3); One end of the sliding rod (224) is slidably inserted into the telescopic hole, and the spring (225) is located in the telescopic hole, with its two ends connected to the inner wall of the telescopic hole and the sliding rod (224) respectively.

6. The automatic tension adjustment device for garment sewing thread according to claim 5, characterized in that, The tensioning assembly (3) includes a fixed plate (32), a guide plate (31), and an elastic element (33); One end of the fixing plate (32) is fixed to the second arch frame (13), and the other end is fixedly connected to the third arch frame (14); One end of the guide plate (31) is hinged to one end of the fixed plate (32) facing the third arch frame (14), and the other end has a movable part on its side, which slides in conjunction with the arc-shaped sliding groove (131). The two ends of the elastic element (33) are connected to the guide plate (31) and the fixed plate (32) respectively, and the included angle between the guide plate (31) and the fixed plate (32) forms an acute angle.

7. The automatic tension adjustment device for garment sewing thread according to claim 6, characterized in that, A sliding track (311) is provided on the side of the guide plate (31) facing away from the fixed plate (32), and the end of the sliding rod (224) away from the telescopic hole contacts the sliding track (311).

8. The automatic tension adjustment device for garment sewing thread according to claim 6, characterized in that, The elastic coefficient of the elastic element (33) is greater than that of the spring (225) in the movable rotating assembly (22).

9. The automatic tension adjustment device for garment sewing thread according to claim 5, characterized in that, The winding path of the sewing thread passes in sequence around the movable end of the tensioning component (3), the first fixed roller (211), the sleeve (222) of the movable rotating component (22), and the second fixed roller (212).

10. The automatic tension adjustment device for garment sewing thread according to claim 6, characterized in that, On the vertical plane, the height of the first fixed roller (211) is lower than the height of the second fixed roller (212), and the height of the fixed plate (32) is lower than the height of the second fixed roller (212).

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