A sewing machine thread tension testing tool

Abstract

The utility model provides a kind of sewing machine thread tension's test tool, belong to test tool technical field.It solves the problem of low precision of existing thread tension test.This sewing machine thread tension's test tool includes bottom plate, fixedly connected on the speed regulating motor and mounting plate of bottom plate, the output shaft of speed regulating motor is fixedly connected with shuttle core, mounting plate is set along vertical direction, the top of mounting plate is fixedly connected with the fixed module for installing thread clipper component, the middle part of mounting plate is fixedly connected with the fixed frame for installing tension tester, fixed module is located directly above fixed frame, column is fixedly connected on bottom plate for bucket cover, column is adjacent with mounting plate, the top of mounting plate is fixedly connected with two reversing column, two reversing column between there is the gap for thread to pass through.This kind of sewing machine thread tension's test tool has the advantages of high detection precision.

Description

Technical Field

[0001] This utility model belongs to the field of testing fixture technology, and relates to a testing fixture for the tension of sewing machine thread. Background Technology

[0002] The purpose of tension control in sewing machine thread is to control the thread exit speed. The tighter the thread clamp of the sewing machine, the greater the tension, and the slower the thread exits; conversely, the looser the thread clamp, the smaller the tension, and the faster the thread is pulled out.

[0003] After a sewing machine finishes production, the tension control of the sewing thread needs to be tested and adjusted. Existing sewing machine thread tension detection and adjustment devices, such as the one disclosed in Chinese patent literature [Patent No.: 202020528557.3; Application Publication No.: CN212247460U], include a thread delivery mechanism, a winding mechanism, a tension tester, and a limiting mechanism for restricting the path of the thread. The thread delivery mechanism contains the thread to be tested, and the tension tester has a detection head for pressing the thread. The thread extends from the thread delivery mechanism, which includes a thread clamp and a needle. The beginning of the thread is fixed to the thread clamp, and the end of the thread is fixed and wound around the winding mechanism. The thread passes through the limiting mechanism, which adjusts the thread angle so that the detection head is aligned with the thread. The detection head of the tension tester presses against the thread passing through the limiting mechanism and measures the current tension value of the thread.

[0004] In this type of thread tension detection and adjustment device, the needle and the limiting mechanism are staggered horizontally, resulting in significant thread bending, which does not match the actual sewing environment and reduces the accuracy of thread tension detection. Furthermore, this type of device performs the detection after the thread tension clamp assembly is installed in the sewing machine; failure to meet the requirements leads to cumbersome adjustments, and some thread tension clamp assemblies that cannot be adjusted properly need to be removed again, making the process inconvenient. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a testing fixture for the tension of sewing machine thread, thereby solving the technical problem of how to improve the testing accuracy.

[0006] The objective of this utility model can be achieved through the following technical solution: A testing fixture for the tension of sewing machine thread includes a base plate, characterized in that it further includes a speed-regulating motor and a mounting plate fixedly connected to the base plate, a bobbin fixedly connected to the output shaft of the speed-regulating motor, the mounting plate being arranged vertically, a fixing module for mounting a thread clamp assembly fixedly connected to the top of the mounting plate, a fixing frame for mounting a tension tester fixedly connected to the middle of the mounting plate, the fixing module being located directly above the fixing frame, a column for mounting a thread spool fixedly connected to the base plate, the column being adjacent to the mounting plate, and two reversing columns fixedly connected to the top of the mounting plate, with a gap between the two reversing columns for the thread to pass through.

[0007] The thread clamp assembly of the sewing machine is installed on a fixed module, and a tension tester is fixed in a fixed frame. The thread spool is placed outside the uprights. The top thread is pulled out of the spool and passed through the gap between the two reversing posts, then through the thread clamp assembly and the tension tester, and finally wound onto the bobbin. The motor is started to move the top thread, and the tension of the top thread is detected by the tension tester. This fixed module is located directly above the fixed frame, simulating the actual path of the top thread in a sewing machine, thus improving the detection accuracy of the testing fixture. This testing fixture installs the manufactured thread clamp assembly onto the fixed module to test and adjust the tightness of the thread clamp assembly, ensuring the quality of the thread clamp assembly. After passing the test, it is then assembled into the sewing machine, avoiding the need to disassemble the thread clamp assembly in the sewing machine. The tension tester is existing technology and can be purchased directly from the market.

[0008] In the aforementioned testing fixture for sewing machine thread tension, the fixing frame includes an upper fixing plate, a lower fixing plate, and several support columns. All the support columns are located between the upper and lower fixing plates and locked by fasteners. A clearance space exists between the upper and lower fixing plates for the tension tester to be partially embedded. Several fixing bolts are fixedly connected to the upper fixing plate, and the shanks of the fixing bolts can extend into the clearance space. This structure allows the tension tester to be positioned simply by embedding it without damaging it. Furthermore, the fixing bolts facilitate easy assembly, disassembly, and testing.

[0009] In the aforementioned testing fixture for sewing machine thread tension, one side of the mounting plate has an upper fixing groove and a lower fixing groove arranged horizontally and spaced apart. The upper fixing plate is partially and tightly embedded in the upper fixing groove, and the lower fixing plate is partially and tightly embedded in the lower fixing groove. This structure allows the fixing frame and the mounting plate to fit more tightly, improving the firmness of the fixing frame connection.

[0010] In the aforementioned testing fixture for sewing machine thread tension, the fixing module includes several fixing blocks and several fixing posts, all of which are spaced apart. This structure ensures stable installation of the thread clamp assembly.

[0011] In the aforementioned testing fixture for sewing machine thread tension, the cross-section of the upright is hexagonal. This structure allows the thread spool to fit tightly with the upright without jamming.

[0012] In the aforementioned testing fixture for sewing machine thread tension, the base plate is rectangular, and both ends of the base plate have countersunk holes for fasteners to pass through. This structure allows the testing fixture to be fixedly connected to the worktable, preventing movement during testing and improving testing accuracy.

[0013] Compared with the prior art, the sewing machine thread tension testing fixture provided by this utility model has the following advantages:

[0014] 1. The movement path of the thread in this test fixture simulates the actual path of the thread in a sewing machine, thus improving the detection accuracy of the test fixture.

[0015] 2. This test fixture installs the manufactured thread clamp assembly onto the fixed module to test and adjust the tightness of the thread clamping surface of the thread clamp assembly, ensuring the quality of the thread clamp assembly product. After passing the test, it is then assembled into the sewing machine to avoid disassembling the thread clamp assembly in the sewing machine. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the test fixture.

[0017] Figure 2 This is a schematic diagram of the overall structure of this test fixture.

[0018] In the diagram, 1 is the base plate; 1a is the countersunk hole; 2 is the speed-regulating motor; 21 is the output shaft; 3 is the mounting plate; 31 is the upper fixing groove; 32 is the lower fixing groove; 4 is the bobbin; 5 is the wire clamp assembly; 6 is the fixing module; 61 is the fixing block; 62 is the fixing post; 7 is the tension tester; 8 is the fixing frame; 81 is the upper fixing plate; 82 is the lower fixing plate; 83 is the support column; 84 is the clearance space; 85 is the fixing bolt; 9 is the wire drum; 10 is the upright column; and 11 is the reversing column. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2As shown, the testing fixture for sewing machine thread tension includes a base plate 1, a speed-regulating motor 2, a mounting plate 3, a bobbin 4, a fixing module 6, a fixing frame 8, a column 10, and a reversing column 11.

[0021] The base plate 1 is rectangular, and both ends of the base plate 1 have countersunk holes 1a for fasteners such as bolts to pass through. The speed-regulating motor 2 and the mounting plate 3 are both fixed to the base plate 1. The spindle core 4 is fixed to the output shaft 21 of the speed-regulating motor 2, and the mounting plate 3 is set in the vertical direction.

[0022] A column 10 with a cable supply drum 9 is fixedly connected to the base plate 1. The cross-section of the column 10 is regular hexagonal. The column 10 is set adjacent to the mounting plate 3. Two reversing columns 11 are fixedly connected to the top of the mounting plate 3. There is a gap between the two reversing columns 11 for the surface cable to pass through.

[0023] The top of the mounting plate 3 is fixedly connected to a fixing module 6 for mounting the wire clamp assembly 5. In this embodiment, the fixing module 6 includes two fixing blocks 61 and four fixing posts 62. All fixing blocks 61 and all fixing posts 62 are spaced apart. In actual production, the number of fixing blocks 61 can be three or four, and the number of fixing posts 62 can be two or three.

[0024] A fixing frame 8 for mounting a tension tester 7 is fixedly connected to the middle of the mounting plate 3. The fixing module 6 is located directly above the fixing frame 8. The fixing frame 8 includes an upper fixing plate 81, a lower fixing plate 82, and three support columns 83. All the support columns 83 are located between the upper fixing plate 81 and the lower fixing plate 82 and are locked by fasteners such as bolts. There is a clearance space 84 between the upper fixing plate 81 and the lower fixing plate 82 for the tension tester 7 to be partially embedded. Two fixing bolts 85 are fixedly connected through the upper fixing plate 81, and the shanks of the fixing bolts 85 can extend into the clearance space 84. One side of the mounting plate 3 has an upper fixing groove 31 and a lower fixing groove 32 arranged horizontally and spaced apart. The upper fixing plate 81 is partially and tightly embedded in the upper fixing groove 31, and the lower fixing plate 82 is partially and tightly embedded in the lower fixing groove 32.

[0025] During testing, the sewing machine's thread clamp assembly 5 is installed on the fixed module 6, the tension tester 7 is fixed in the fixed frame 8, the thread spool 9 is placed outside the column 10, the top thread on the thread spool 9 is pulled out, and the top thread is passed through the gap between the two reversing columns 11, then through the thread clamp assembly 5 and the tension tester 7, and finally wound onto the bobbin 4. The motor is started to pull the top thread to move, and the tension of the top thread is detected by the tension tester 7.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0027] Although this document frequently uses terms such as base plate 1, countersunk hole 1a, speed-regulating motor 2, output shaft 21, mounting plate 3, upper fixing groove 31, lower fixing groove 32, bobbin 4, wire clamp assembly 5, fixing module 6, fixing block 61, fixing post 62, tension tester 7, fixing frame 8, upper fixing plate 81, lower fixing plate 82, support column 83, clearance space 84, fixing bolt 85, wire spool 9, upright column 10, and reversing column 11, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A testing fixture for the tension of sewing machine thread, comprising a base plate (1), characterized in that, It also includes a speed-regulating motor (2) and a mounting plate (3) fixedly connected to the base plate (1). A bobbin (4) is fixedly connected to the output shaft (21) of the speed-regulating motor (2). The mounting plate (3) is arranged in a vertical direction. A fixing module (6) for installing a wire clamp assembly (5) is fixedly connected to the top of the mounting plate (3). A fixing frame (8) for installing a tension tester (7) is fixedly connected to the middle of the mounting plate (3). The fixing module (6) is located directly above the fixing frame (8). A column (10) for the wire spool (9) is fixedly connected to the base plate (1). The column (10) is arranged adjacent to the mounting plate (3). Two reversing columns (11) are fixedly connected to the top of the mounting plate (3). There is a gap between the two reversing columns (11) for the face thread to pass through.

2. The testing fixture for sewing machine thread tension according to claim 1, characterized in that, The fixed frame (8) includes an upper fixed plate (81), a lower fixed plate (82), and several support columns (83). All the support columns (83) are located between the upper fixed plate (81) and the lower fixed plate (82) and are locked by fasteners. There is a clearance space (84) between the upper fixed plate (81) and the lower fixed plate (82) for the tension tester (7) to be partially embedded. Several fixing bolts (85) are fixedly connected through the upper fixed plate (81), and the rods of the fixing bolts (85) can extend into the clearance space (84).

3. The testing fixture for sewing machine thread tension according to claim 2, characterized in that, The mounting plate (3) has an upper fixing groove (31) and a lower fixing groove (32) arranged horizontally and spaced apart on one side. The upper fixing plate (81) is partially and tightly embedded in the upper fixing groove (31), and the lower fixing plate (82) is partially and tightly embedded in the lower fixing groove (32).

4. A testing fixture for sewing machine thread tension according to claim 1, 2, or 3, characterized in that, The fixing module (6) includes several fixing blocks (61) and several fixing posts (62), and all the fixing blocks (61) and all the fixing posts (62) are spaced apart.

5. A testing fixture for sewing machine thread tension according to claim 1, 2, or 3, characterized in that, The cross-section of the column (10) is a regular hexagon.

6. A testing fixture for sewing machine thread tension according to claim 1, 2, or 3, characterized in that, The base plate (1) is rectangular, and both ends of the base plate (1) have countersunk holes (1a) for fasteners to pass through.

Images