Toughness testing device for nylon yarns

Abstract

The invention relates to the field of chinlon silk thread testing, and discloses a chinlon silk thread toughness testing device which comprises a bottom plate and vertical plates, the two vertical plates are fastened to the positions, close to the middle, of the upper face of the bottom plate through bolts, and two sets of fixing plates are arranged between the two vertical plates through overturning structures. According to the device, a to-be-wiped chinlon yarn can be directly hung on the movable clamping structure, then the chinlon yarn can be automatically moved and clamped through the movable clamping structure and the first driving structure, pulling is conducted in cooperation with the testing structure, testing work of the chinlon yarn is achieved, the chinlon yarn does not need to be manually tightened and loosened, and operation is more labor-saving; and after the nylon threads on one group of fixing plates are tested, the nylon threads on the other group of fixing plates can be directly overturned to a testing station through the overturning structure, so that the testing work can be continued while the tested nylon threads are taken down, and the wiping work efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nylon filament testing, and in particular to a toughness testing device for nylon filaments. Background Art

[0002] Nylon filament is a wire made of nylon fiber, which has characteristics such as high wear resistance, excellent mechanical strength and good corrosion resistance; nylon filament is widely used in daily life for making sportswear, scarves, socks, etc., and is also used in the medical field for making bandages. In order to ensure the production quality of nylon filament, a testing device is needed to test the toughness of nylon filaments;

[0003] In the existing testing device, the movable rod is pulled into the groove by pulling the handle, the nylon industrial yarn sample to be detected is placed in the snap ring, and the handle is released to make the movable rod snap into the slot opened on the shell, so as to fix the nylon industrial yarn in the snap ring, and the snap ring is fixed on the first rod body, which facilitates the replacement of the nylon industrial yarn sample. At the same time, the snap ring can effectively clamp the nylon industrial yarn sample, avoiding the problem of nylon industrial yarn falling off during the detection process;

[0004] However, in the actual testing process, it is necessary to manually tie the nylon filaments to be tested tightly before testing, and then after testing, it is necessary to untie the tied nylon filaments again. In this way, when a large number of nylon filaments are tested, it is necessary to repeatedly tie and loosen the nylon filaments, which is rather troublesome. And after testing the nylon filaments, it is necessary to loosen the tested nylon filaments again and then tie the nylon filaments to be tested tightly again before continuing the testing work, resulting in a reduction in work efficiency. Therefore, there are areas for improvement. Summary of the Invention

[0005] In order to solve the problems raised in the above background art, the present invention provides a toughness testing device for nylon filaments.

[0006] The toughness testing device for nylon filaments provided by the present invention adopts the following technical solutions:

[0007] A toughness testing device for nylon filaments includes a bottom plate and a vertical plate. Two vertical plates are fastened to the upper surface of the bottom plate near the middle by bolts. Two groups of fixing plates are arranged between the two vertical plates through a flipping structure. A moving clamping structure is arranged on each fixing plate. Hanging structures are arranged on the left and right sides of the upper surface of the bottom plate. Push-pull testing structures are arranged at the top ends of the mutually remote side surfaces of the two vertical plates;

[0008] The camming mechanism is a kind of mechanism that is used for the sliding of the sliding plate, and the mechanism of sliding is a kind of mechanism that is used for the sliding plate, and the mechanism of sliding is a kind of mechanism that is used for the sliding plate.

[0009] The first driving structure includes a vertical groove provided on the fixed block, a lifting block is slidably arranged in the vertical groove, the lifting block is connected to the lifting plate, the lifting block is connected to the first plug rod at the middle of a side surface away from the lifting plate, a first driving groove is provided on the rear side surface of the fixed plate, and one end of the first plug rod passes through the first driving groove.

[0010] Preferably, the clamping structure includes a hanging plate installed on the groove wall away from the movable plate, the hanging plate is in a "U" shape, a raised portion is provided at one end of the hanging plate, and rubber pads are provided in the middle of the inner walls on both sides of the upper and lower sides of the hanging plate.

[0011] Preferably, the rotating structure includes a second connecting shaft fixedly connected to the bottom end of the lower clamping block, the second connecting shaft rotates through the movable plate, the bottom end of the second connecting shaft is connected to the transmission rod, and a second driving structure is arranged between the transmission rod and the fixed plate.

[0012] Preferably, the second driving structure includes a lifting sleeve mounted on the bottom end of the transmission rod, the second plug rod is fixedly inserted into the lifting sleeve, a spiral groove is provided on the transmission rod, one hemispherical end of the second plug rod is inserted into the spiral groove, and a cross plate is connected to the fixed plate near the second plug rod, the cross plate is provided with a second driving groove, and one end of the second plug rod moves through the second driving groove.

[0013] Preferably, the flipping structure includes a flipping axis that rotates and passes through the top ends of the two vertical plates, a fixed cylinder is fixedly sleeved in the middle of the flipping axis, a guide groove is opened on the fixed cylinder corresponding to each fixed plate, a moving block is slidably arranged in each of the guide grooves, a moving seat is installed on the moving block, and one end of the fixed plate is connected to the moving seat.

[0014] Preferably, the push-pull test structure includes a second electric telescopic rod installed at the upper end of the side of the vertical plate away from the fixed plate. One end of the output shaft of the second electric telescopic rod is connected to a test rod, and a connection structure is provided between the test rod and the fixed plate.

[0015] Preferably, the connection structure includes a connecting plate connected to one end of the test rod. A connecting seat is installed on the side of the fixed plate close to the flipping shaft. One end of the connecting plate is inserted into the connecting plate, and a screw rod rotates through a threaded groove at one end of the front surface of the connecting seat. One end of the screw rod is inserted into a positioning groove opened on the connecting plate.

[0016] Preferably, the suspension structure includes suspension plates fastened to the upper left and right sides of the bottom plate by bolts. Two groups of fixed shafts are respectively connected above the front and rear sides of each suspension plate. A suspension wheel is fixedly sleeved on each fixed shaft, and multiple suspension wheels in each group are arranged at intervals in the vertical direction.

[0017] In summary, the present invention includes the following beneficial technical effects:

[0018] 1. By providing two groups of fixed plates, as well as a flipping structure, a test structure, a moving clamping structure, and a first driving structure, during the test, the nylon silk thread to be wiped can be directly suspended on the moving clamping structure. Then, through the moving clamping structure and the first driving structure, the nylon silk thread can be automatically moved and clamped, and cooperate with the test structure for pulling to achieve the test work of the nylon silk thread. There is no need for manual tying and loosening of the nylon silk thread, and the operation is more labor-saving. And after the nylon silk thread on one group of fixed plates is tested, through the flipping structure, the nylon silk thread on the other group of fixed plates can be directly flipped to the test station, so that while removing the tested nylon silk thread, the test work can continue, thus greatly improving the wiping work efficiency;

[0019] 2. By providing a clamping and hanging structure, after the nylon silk thread is suspended, the two ends of the nylon silk thread can be clamped and hung on the clamping and hanging structure to avoid the problem of the nylon silk thread falling during the automatic clamping process. By providing a connection structure, the test structure can be respectively connected to the two groups of fixed plates to carry out the toughness test work of the nylon silk thread. After connection, it can also play a role in positioning the fixed plate on the vertical plate;

[0020] 3. By providing a rotating structure and a second driving structure, after the upper clamping block and the lower clamping block clamp the nylon silk thread, cooperating with the rotating structure and the second driving structure, the nylon silk thread can be automatically driven to rotate after being clamped, so that part of the nylon silk is wound on the upper clamping block, thus better avoiding the nylon silk thread falling off during the test process and ensuring the test work efficiency. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a toughness testing device for nylon silk threads in an embodiment of the present invention;

[0022] Figure 2 It is a schematic structural diagram at the vertical plate in an embodiment of the present invention;

[0023] Figure 3 It is in an embodiment of the present invention Figure 2 The enlarged view of the structure at position A;

[0024] Figure 4 It is in an embodiment of the present invention Figure 2 The enlarged view of the structure at position B;

[0025] Figure 5 It is a schematic structural diagram at the fixing plate in an embodiment of the present invention;

[0026] Figure 6 It is in an embodiment of the present invention Figure 5 The enlarged view of the structure at position C;

[0027] Figure 7 It is a schematic structural diagram at the clamping and hanging structure in an embodiment of the present invention;

[0028] Figure 8 It is a schematic structural diagram at the moving plate in an embodiment of the present invention.

[0029] Explanation of reference numerals: 1, bottom plate; 2, vertical plate; 3, fixing plate; 4, groove; 5, transverse groove; 6, moving plate; 7, first electric telescopic rod; 8, bottom block; 9, lower clamping block; 10, upper clamping block; 11, clamping groove; 12, convex block; 13, lifting block; 14, vertical groove; 15, first insertion rod; 16, lifting plate; 17, first connecting shaft; 18, first driving groove; 19, hanging piece; 20, tilting part; 21, rubber pad; 22, second connecting shaft; 23, transmission rod; 24, lifting sleeve; 25, spiral groove; 26, second insertion rod; 27, transverse plate; 28, second driving groove; 29, suspension wheel; 30, turning shaft; 31, fixed cylinder; 32, moving seat; 33, moving block; 34, guiding groove; 35, second electric telescopic rod; 36, test rod; 37, connecting plate; 38, connecting seat; 39, screw; 40, suspension plate; 41, fixed shaft; 42, fixed block. Detailed implementation manners

[0030] The following further elaborates on the present invention in conjunction with the attached Figures 1-8 drawings.

[0031] Refer to Figures 1-8The embodiment of the present invention discloses a toughness testing device for nylon yarn, comprising a bottom plate 1 and a vertical plate 2, two vertical plates 2 are fastened by bolts near the middle of the bottom plate 1, two sets of fixed plates 3 are arranged between the two vertical plates 2 through a flip structure, and each fixed plate 3 is provided with a movable clamping structure, and a suspension structure is arranged on both sides of the bottom plate 1, and a push-pull test structure is arranged at the top of a side away from each other of the two vertical plates 2;

[0032] The movable clamping structure comprises a groove 4 provided on the front of the fixed plate 3 away from the flip structure, a transverse groove 5 is provided on the front side of the fixed plate 3 and the groove wall of the groove 4, a movable plate 6 is slidably provided in each group of transverse grooves 5, a clamping structure is provided at the rear groove wall of the groove 4 away from the movable plate 6, a bottom block 8 is connected to the middle of one side edge of the lower side of the movable plate 6, a first electric telescopic rod 7 is installed on the groove wall at one end of the groove 4, one end of the output shaft of the first electric telescopic rod 7 is connected to the bottom block 8, a lower clamping block 9 is provided in the middle of the movable plate 6 through a rotating structure, a fixed block 42 is connected to the middle of the rear edge of the upper side of the movable plate 6, a first driving structure is provided between the fixed block 42 and the fixed plate 3, a lifting plate 16 is provided on the fixed block 42, one end of the lifting plate 16 rotates through the first connecting shaft 17, an upper clamping block 10 is installed at the bottom end of the first connecting shaft 17, a clamping groove 11 is provided in the middle of the upper clamping block 10 and the lower clamping block 9 close to each other, and a protrusion 12 is provided in the clamping groove 11 of the upper clamping block 10;

[0033] The first driving structure includes a vertical slot 14 provided on the fixed block 42, a lifting block 13 is slidably arranged in the vertical slot 14, the lifting block 13 is connected to the lifting plate 16, a first plugging rod 15 is connected to the middle of a side of the lifting block 13 away from the lifting plate 16, a first driving slot 18 is provided on the rear side of the fixed plate 3, and one end of the first plugging rod 15 passes through the first driving slot 18;

[0034] The clamping structure includes a tightening piece 19 installed on the groove wall of the groove 4 away from the movable plate 6, the tightening piece 19 is in a "U" shape, one end of the tightening piece 19 is provided with a raised portion 20, and rubber pads 21 are provided in the middle of the inner walls on both sides of the upper and lower sides of the tightening piece 19;

[0035] The flipping structure includes a flipping shaft 30 that rotates through the tops of two vertical plates 2. A fixed cylinder 31 is fixedly sleeved in the middle of the flipping shaft 30. Guide grooves 34 are provided on the fixed cylinder 31 corresponding to each fixing plate 3. A moving block 33 is slidably arranged in each guide groove 34. A moving seat 32 is installed on the moving block 33. One end of the fixing plate 3 is connected to the moving seat 32. First, the nylon silk thread to be tested is passed through between each set of lower clamping blocks 9 and upper clamping blocks 10 above, and a certain length of nylon silk thread is left between the two sets of upper clamping blocks 9 and lower clamping blocks 10 above. Then, the end of the nylon silk thread is pulled into the hanging piece 19, and the end of the nylon silk thread is clamped on the rubber pad 21 inside the hanging piece 19. Then, the first electric telescopic rod 7 is directly started to drive the moving plate 6 to move on the fixing plate 3. When the moving plate 6 moves, it drives one end of the first insertion rod 15 to slide in the first driving groove 18. Under the guiding action of the first driving groove 18 on one end of the first insertion rod 15, the middle lifting block 13 and the lifting plate 16 as a whole are pushed to move downward on the fixed block 42, so as to drive the upper clamping block 10 to move downward and sleeve onto the lower clamping block 9, and the convex block 12 on the upper clamping block 10 clamps the nylon silk thread on the lower clamping block 9, so as to automatically clamp the nylon silk thread. During the test, there is no need to manually tie the nylon silk thread. And when the first electric telescopic rod 7 drives the moving plate 6 to move in the reverse direction, it can also use one end of the first insertion rod 15 to slide in the first driving groove 18 to drive the upper clamping block 10 to move upward and reset, so as to automatically loosen the nylon silk thread after the test, making it more convenient to remove the nylon silk thread after the test from the fixing plate 3; after the test, by rotating the flipping shaft 30, the fixing plate 3 hanging the nylon silk thread to be tested below is directly rotated up to the test position, so that during the process of removing the nylon silk after the test, the test work of the nylon silk can continue.

[0036] See Figure 1 , Figure 5 , Figure 6 and Figure 8 , the rotating structure includes a second connecting shaft 22 fixedly connected to the bottom end of the lower clamping block 9. The second connecting shaft 22 rotates through the moving plate 6. The bottom end of the second connecting shaft 22 is connected to a transmission rod 23. A second driving structure is arranged between the transmission rod 23 and the fixing plate 3;

[0037] The second driving structure includes a lifting sleeve 24 sleeved on the bottom end of the transmission rod 23. A second insertion rod 26 is fixedly inserted into the lifting sleeve 24. A guiding telescopic rod is connected to the second insertion rod 26 to ensure that the second insertion rod 26 can move smoothly in the vertical direction. A spiral groove 25 is formed on the transmission rod 23. One end of the second insertion rod 26 in a hemispherical shape is inserted into the spiral groove 25. A cross plate 27 is connected to the fixed plate 3 near the second insertion rod 26. A second driving groove 28 is formed on the cross plate 27. One end of the second insertion rod 26 movably passes through the second driving groove 28. After the upper clamping block 10 and the lower clamping block 9 clamp the nylon silk thread, as the moving plate 6 continues to move, it drives one end of the second insertion rod 26 to slide in the second driving groove 28 on the cross plate 27, thereby pushing the second insertion rod 26 and the lifting sleeve 24 as a whole to move upward on the transmission rod 23. By using the sliding of one end of the second insertion rod 26 in the spiral groove 25, it automatically drives the upper clamping block 10 and the lower clamping block 9 as a whole to rotate, so as to wind part of the nylon silk thread onto the upper clamping block 10, which can better avoid the problem that the nylon silk thread falls off during the test and affects the normal test.

[0038] See Figure 1 , Figure 6 and Figure 8 , the push-pull test structure includes a second electric telescopic rod 35 installed at the upper end of the side surface of the vertical plate 2 away from the fixed plate 3. One end of the output shaft of the second electric telescopic rod 35 is connected to a test rod 36. A connection structure is provided between the test rod 36 and the fixed plate 3;

[0039] The connection structure includes a connection plate 37 connected to one end of the test rod 36. A connection seat 38 is installed on the side surface of the fixed plate 3 near the turning shaft 30. One end of the connection plate 37 is inserted into the connection plate 37. One end of the screw rod 39 rotatably passes through the threaded groove on the front end of the connection seat 38. One end of the screw rod 39 is inserted into the positioning groove formed on the connection plate 37. During the test, the second electric telescopic rod 35 drives one end of the test rod 36, and the connection plate 37 is inserted into the connection seat 38, and the screw rod 39 is rotated on the connection seat 38, and one end of the screw rod 39 is inserted into the positioning groove on the connection plate 37, so that the test rod 36 is connected to the corresponding fixed plate 3. In this way, when the second electric telescopic rod 35 drives the corresponding two fixed plates 3 to move away from each other, the toughness test of the nylon silk thread can be carried out.

[0040] See Figure 1 , the suspension structure includes suspension plates 40 fastened to the left and right sides of the upper surface of the bottom plate 1 by bolts. Two groups of fixed shafts 41 are respectively connected to the upper parts of the front and rear sides of the suspension plates 40. A suspension wheel 29 is fixedly sleeved on each fixed shaft 41. A plurality of suspension wheels 29 in each group are arranged at intervals in the vertical direction. The middle section of the nylon silk thread is wound around the suspension wheels 29, and the nylon silk to be tested and the tested nylon silk can be suspended and stored on the two suspension plates 40.

[0041] The implementation principle of a toughness testing device for nylon silk threads in an embodiment of the present invention is as follows: First, pass the nylon silk thread to be tested through between the lower clamping blocks 9 and the upper clamping blocks 10 of each group, and leave a certain length of the nylon silk thread between the upper clamping blocks 9 and the lower clamping blocks 10 in the upper two groups. Then, pull the end of the nylon silk thread into the hanging and tightening piece 19, and the end of the nylon silk thread is clamped on the rubber pad 21 inside the hanging and tightening piece 19. Then, directly start the first electric telescopic rod 7 to drive the moving plate 6 to move on the fixed plate 3. When the moving plate 6 moves, it drives one end of the first insertion rod 15 to slide in the first driving groove 18. Under the guiding action of the first driving groove 18 on one end of the first insertion rod 15, it pushes the middle lifting block 13 and the lifting plate 16 as a whole to move downward on the fixed block 42, thereby driving the upper clamping block 10 to move downward and sleeve onto the lower clamping block 9, and the convex block 12 on the upper clamping block 10 clamps the nylon silk thread on the lower clamping block 9, thus automatically clamping the nylon silk thread. During the test, there is no need to manually tie the nylon silk thread. After the upper clamping block 10 and the lower clamping block 9 clamp the nylon silk thread, as the moving plate 6 continues to move, it drives one end of the second insertion rod 26 to slide in the second driving groove 28 on the cross plate 27, thereby pushing the second insertion rod 26 and the lifting sleeve 24 as a whole to move upward on the transmission rod 23. By using the sliding of one end of the second insertion rod 26 in the spiral groove 25, it automatically drives the upper clamping block 10 and the lower clamping block 9 as a whole to rotate, thereby winding a part of the nylon silk thread onto the upper clamping block 10. During the test, it can better avoid the problem that the nylon silk thread falls off and affects the normal test. Then, the second electric telescopic rod 35 drives the connecting plate 37 at one end of the test rod 36 to insert into the connecting seat 38, and rotates the screw rod 39 on the connecting seat 38, and inserts one end of the screw rod 39 into the positioning groove on the connecting plate 37, so that the test rod 36 is connected to the corresponding fixed plate 3. In this way, when the second electric telescopic rod 35 drives the corresponding two fixed plates 3 to move away from each other, the toughness test of the nylon silk thread can be carried out. After the test, the second electric telescopic rod 35 drives the fixed plate 3 to reset, rotates the screw rod 39 to pull its one end out of the positioning groove on the connecting plate 37, and then the first electric telescopic rod 7 drives the moving plate 6 to reset, thereby loosening the nylon silk thread after the test. Then, rotate the turning shaft 30 on the vertical plate 2 to switch the nylon silk thread on the lower group of fixed plates 3 to the test position, so that during the process of removing the nylon silk thread, the test of the nylon silk thread can continue, making reasonable use of the working time and having a higher test work efficiency.

[0042] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A toughness testing device for nylon silk threads, comprising a bottom plate (1) and a vertical plate (2), characterized in that: On the upper surface of the bottom plate (1), near the middle, two vertical plates (2) are fastened by bolts. Between the two vertical plates (2), two groups of fixed plates (3) are arranged through a flipping structure. A moving clamping structure is arranged on each fixed plate (3). Suspension structures are arranged on the left and right sides of the upper surface of the bottom plate (1). Push-pull test structures are arranged at the top ends of the mutually remote side surfaces of the two vertical plates (2). The moving clamping structure includes a groove (4) opened on the front surface of the fixed plate (3) away from the flipping structure. Transverse grooves (5) are opened on the front side surface of the fixed plate (3) and the groove wall of the groove (4). A moving plate (6) is slidably arranged in each group of the transverse grooves (5). A clamping and hanging structure is arranged on the rear groove wall of the groove (4) away from the moving plate (6). One side edge in the middle of the lower surface of the moving plate (6) is connected with a bottom block (8). A first electric telescopic rod (7) is installed on the groove wall at one end of the groove (4). One end of the output shaft of the first electric telescopic rod (7) is connected with the bottom block (8). A lower clamping block (9) is arranged on the middle of the moving plate (6) through a rotating structure. A fixed block (42) is connected to the middle of the rear edge of the upper surface of the moving plate (6). A first driving structure is arranged between the fixed block (42) and the fixed plate (3). A lifting plate (16) is arranged on the fixed block (42). One end of the lifting plate (16) rotatably passes through a first connecting shaft (17). An upper clamping block (10) is installed at the bottom end of the first connecting shaft (17). Clamping grooves (11) are opened in the middle of the mutually close side surfaces of the upper clamping block (10) and the lower clamping block (9). A convex block (12) is arranged in the clamping groove (11) of the upper clamping block (10). The first driving structure includes a vertical groove (14) opened on the fixed block (42). A lifting block (13) is slidably arranged in the vertical groove (14). The lifting block (13) is connected with the lifting plate (16). A first inserting rod (15) is connected to the middle of the side surface of the lifting block (13) away from the lifting plate (16). A first driving groove (18) is opened on the rear side surface of the fixed plate (3). One end of the first inserting rod (15) passes through the first driving groove (18).

2. The toughness testing device for polyamide silk thread according to claim 1, wherein: The clamping and hanging structure includes a hanging and tightening piece (19) installed on the groove wall of the groove (4) away from the moving plate (6). The hanging and tightening piece (19) is in a "U" shape. One end of the hanging and tightening piece (19) is provided with a tilting part (20). Rubber pads (21) are arranged in the middle of the upper and lower inner walls of the hanging and tightening piece (19).

3. The toughness testing device for nylon silk thread according to claim 1, characterized in that: The rotating structure includes a second connecting shaft (22) fixedly connected to the bottom end of the lower clamping block (9). The second connecting shaft (22) rotatably passes through the moving plate (6). A transmission rod (23) is connected to the bottom end of the second connecting shaft (22). A second driving structure is arranged between the transmission rod (23) and the fixed plate (3).

4. The toughness testing device for polyamide filament yarn according to claim 3, characterized in that: The second driving structure includes a lifting sleeve (24) sleeved at the bottom end of the transmission rod (23). A second insertion rod (26) is fixedly inserted into the lifting sleeve (24). A spiral groove (25) is formed on the transmission rod (23). One end of the second insertion rod (26) in a hemispherical shape is inserted into the spiral groove (25). A cross plate (27) is connected to the fixing plate (3) near the second insertion rod (26). A second driving groove (28) is formed on the cross plate (27). One end of the second insertion rod (26) movably passes through the second driving groove (28).

5. A toughness testing device for nylon silk threads according to claim 1, characterized in that: The flipping structure includes a flipping shaft (30) rotatably passing through the tops of two vertical plates (2). A fixing cylinder (31) is fixedly sleeved in the middle of the flipping shaft (30). A guiding groove (34) is formed on the fixing cylinder (31) corresponding to each fixing plate (3). A moving block (33) is slidably arranged in each guiding groove (34). A moving seat (32) is installed on the moving block (33). One end of the fixing plate (3) is connected to the moving seat (32).

6. The toughness testing device for nylon silk thread according to claim 1, wherein: The pushing and pulling test structure includes a second electric telescopic rod (35) installed at the upper end of the side surface of the vertical plate (2) away from the fixing plate (3). One end of the output shaft of the second electric telescopic rod (35) is connected to a test rod (36). A connecting structure is arranged between the test rod (36) and the fixing plate (3).

7. The toughness testing device for polyamide filaments according to claim 6, wherein: The connecting structure includes a connecting plate (37) connected to one end of the test rod (36). A connecting seat (38) is installed on the side surface of the fixing plate (3) near the flipping shaft (30). One end of the connecting plate (37) is inserted into the connecting plate (37). A screw rod (39) rotatably passes through a threaded groove at one end of the front surface of the connecting seat (38). One end of the screw rod (39) is inserted into a positioning groove formed on the connecting plate (37).

8. A toughness testing device for polyamide silk threads according to claim 1, characterized in that: The hanging structure includes hanging plates (40) fastened to the upper left and right sides of the upper surface of the bottom plate (1) by bolts. Two groups of fixed shafts (41) are respectively connected to the upper front and rear sides of each hanging plate (40). A hanging wheel (29) is fixedly sleeved on each fixed shaft (41). A plurality of the hanging wheels (29) in each group are arranged at intervals in the vertical direction.

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