A stretching testing machine and method for dressing patches

Abstract

The present invention discloses a tensile testing machine and method for dressing patches, belonging to the technical field of dressing patch testing. A tensile testing machine for dressing patches includes a workbench. A second clamping assembly is provided in the middle of the workbench, and a plurality of first clamping assemblies are circumferentially distributed on the workbench. The two ends of a plurality of dressing patches are clamped by the plurality of first clamping assemblies in a manner of cooperating with the second clamping assembly. A testing assembly cooperating with the first clamping assembly is provided on the workbench, a driving assembly cooperating with the second clamping assembly is provided at the bottom of the workbench, and a one-way transmission assembly is provided between the second clamping assembly and the testing assembly. It has the advantages of centralized clamping, fast and stable clamping, efficient testing, meeting different testing requirements, reliable structure, convenient operation, and simple and practical use.

Description

Technical Field

[0001] The present invention relates to the technical field of dressing patch testing, and specifically relates to a tensile testing machine and method for dressing patches. Background Art

[0002] Dressing patches are medical supplies used to cover and protect skin wounds, which can reduce bacterial infection, promote healing, and relieve inflammation or discomfort at the same time. Some dressing patches contain antibacterial agents or growth factors, which can accelerate wound repair. The tensile performance of dressing patches is one of their key quality indicators, directly affecting the wound care effect, patient comfort, and freedom of movement.

[0003] During the production process of dressing patches, it is necessary to randomly select several dressing patches from the same batch for tensile testing. When the existing tensile testing machine for dressing patches is in use, only one dressing patch can be subjected to tensile testing in one test. When multiple dressing patches need to be subjected to tensile testing, the overall testing time of the dressing patches will be greatly prolonged, reducing the testing efficiency. If multiple tensile testing machines are used for testing, the cost will be seriously increased. Moreover, most of the existing tensile testing machines for dressing patches can only perform single tensile testing on dressing patches, with a single function, unable to quickly perform cyclic tensile testing on them, unable to meet the testing requirements of different usage scenarios, and reducing the applicability of the device.

[0004] Therefore, it is necessary to provide a tensile testing machine and method for dressing patches to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the embodiments of the present invention is to provide a tensile testing machine and method for dressing patches to solve the problems in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A tensile testing machine for dressing patches includes a workbench. A second clamping assembly is provided in the middle of the workbench. A plurality of first clamping assemblies are circumferentially distributed on the workbench. The two ends of a plurality of dressing patches are clamped by the plurality of first clamping assemblies in a manner of cooperating with the second clamping assembly. A testing assembly cooperating with the first clamping assembly is provided on the workbench. A driving assembly cooperating with the second clamping assembly is provided at the bottom of the workbench. A one-way transmission assembly is provided between the second clamping assembly and the testing assembly.

[0008] As a further solution of the present invention, the first clamping assembly includes a mounting frame circumferentially distributed on the workbench. An adjusting seat is slidably arranged on the mounting frame. A hinged seat is arranged on the adjusting seat. Above the adjusting seat, a first pressing plate is movably arranged on the side of the hinged seat close to the middle of the workbench. Gaskets are arranged on the sides of the adjusting seat and the first pressing plate close to each other. The upper part of the first pressing plate is connected with a hinged plate rotatably matched with the hinged seat. An electric cylinder is connected between one end of the adjusting seat far from the first pressing plate and the hinged plate. A displacement adjusting module is arranged between the mounting frame and the adjusting seat.

[0009] As a further solution of the present invention, the position adjusting module includes limiting tooth grooves symmetrically arranged on both side walls of the mounting frame. Connecting grooves are symmetrically arranged inside the adjusting seat. Sliding plates are slidably arranged in the connecting grooves. First springs are connected between the sliding plates and the connecting grooves. The side of the sliding plate far from the connecting groove is connected with a T-shaped adjusting push plate. A limiting rack part that is movably meshed with the limiting tooth groove is arranged at one end of the adjusting push plate close to the sliding plate.

[0010] As a further solution of the present invention, the second clamping assembly includes a placing table arranged in the middle of the workbench. A through hole is arranged in the middle of the placing table. A plurality of vertical sliding grooves are circumferentially distributed on the through hole. A plurality of guiding holes are circumferentially distributed on the outer edge of the placing table. A second pressing plate is movably arranged on the placing table. A plurality of guiding rods that are slidably matched with the guiding holes are circumferentially distributed at the bottom of the second pressing plate. A rotating threaded cylinder that is movably arranged inside the through hole is rotatably arranged on the second pressing plate. A plurality of first sliding columns that are slidably matched with the vertical sliding grooves are arranged on the outer wall of the rotating threaded cylinder.

[0011] As a further solution of the present invention, the driving assembly includes a screw rod rotatably arranged inside the workbench. The top end of the screw rod is threadedly connected with the rotating threaded cylinder. The bottom end of the screw rod is connected with a driven bevel gear. A motor is installed at the bottom of the workbench. The output end of the motor is connected with a driving bevel gear that meshes with the driven bevel gear.

[0012] As a further solution of the present invention, the test assembly includes guiding sliding grooves circumferentially distributed on the workbench. A cross bar is installed in the guiding sliding grooves. A movable seat connected with the corresponding mounting frame is slidably arranged inside the cross bar. A second spring sleeved outside the cross bar is connected between the movable seat and the guiding sliding grooves. A second sliding column is installed at the bottom of the movable seat. A rotating cam ring is rotatably arranged inside the workbench. The outer edge of the rotating cam ring is in movable contact with the second sliding column.

[0013] As a further solution of the present invention, the one-way transmission assembly includes a guiding ring groove arranged inside the through hole. The guiding ring groove communicates with the bottom end of the vertical sliding groove. A plurality of fixing columns are circumferentially arranged on the inner side of the through hole. A first ratchet pawl that is rotatably arranged on the fixing column and is in movable abutment with the bottom of the guiding ring groove is provided. One side wall of the first ratchet pawl is coplanar with the side wall of the vertical sliding groove. A torsion spring is connected between the first ratchet pawl and the fixing column. A ratchet ring is provided on the outer wall of the bottom of the rotating threaded cylinder. A plurality of second ratchet pawls that are in movable abutment with the ratchet ring are circumferentially distributed on the inner side of the rotating cam ring. A third spring is connected between the second ratchet pawl and the rotating cam ring.

[0014] As a further solution of the present invention, both the second pressing plate and the placing table are arranged on the regular polygon plate, and the number of sides of the second pressing plate is the same as that of the placing table.

[0015] As a further solution of the present invention, a plurality of protrusions are circumferentially arranged on the outer edge of the rotating cam ring, and the number of protrusions of the rotating cam ring is the same as the number of the second sliding columns.

[0016] A method for using a stretching test machine for dressing patches includes the following steps:

[0017] Step S1: The second clamping assembly centrally clamps one end of a plurality of dressing patches by cooperating with the driving assembly;

[0018] Step S2: The first clamping assembly correspondingly clamps the outer end of the corresponding dressing patch;

[0019] Step S3: According to the test requirements, the driving assembly performs a single stretching test or a cyclic stretching test on a plurality of dressing patches by cooperating with the one-way transmission assembly.

[0020] In summary, compared with the prior art, the embodiment of the present invention has the following beneficial effects:

[0021] 1. In the present invention, through the cooperation of the second clamping assembly and the driving assembly, one end of a plurality of dressing patches can be centrally clamped. Through the first clamping assembly, the outer end of the corresponding dressing patch can be separately clamped, so that the clamping of a plurality of dressing patches can be realized, which is convenient for simultaneously performing stretching tests on a plurality of dressing patches, and the test results are more obvious. At the same time, according to the different specifications of the dressing patches, the clamping position of the outer end of the dressing patch can be adaptively adjusted to meet the rapid clamping of dressing patches of different specifications, improving the applicability of the device;

[0022] 2. In the present invention, after the ends of several dressing patches are centrally clamped, through the cooperation of the driving assembly and the one-way transmission assembly, the first clamping assembly can be driven to gradually move away from the second clamping assembly, and according to the actual tensile test requirements, single tensile tests or cyclic tensile tests can be performed on multiple dressing patches to meet the simulation test requirements of different scenarios; meanwhile, it can be ensured that the dressing patches are in a state of being clamped at both ends before the tensile test, improving the stability of the tensile test.

[0023] To more clearly elaborate on the structural features and functions of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a perspective view of a tensile testing machine for dressing patches in an embodiment of the invention.

[0025] Figure 2 FIG. is a schematic structural diagram of the first clamping assembly in an embodiment of the invention.

[0026] Figure 3 FIG. is a sectional view of the first clamping assembly in an embodiment of the invention.

[0027] Figure 4 FIG. is a sectional view of a tensile testing machine for dressing patches in an embodiment of the invention.

[0028] Figure 5 For Figure 4 The partial enlarged view of part A in

[0029] Figure 6 FIG. is a schematic structural diagram of the test assembly in an embodiment of the invention.

[0030] Figure 7 FIG. is a sectional view of the workbench in an embodiment of the invention.

[0031] Figure 8 For Figure 7 The partial enlarged view of part B in

[0032] Figure 9 FIG. is a schematic structural diagram of the rotating cam ring in an embodiment of the invention.

[0033] Figure 10 FIG. is a schematic structural diagram of the driving assembly in an embodiment of the invention.

[0034] Reference numerals: 1, workbench; 101, protective ring; 102, bottom column; 103, controller;

[0035] 2. First clamping assembly; 201. Mounting frame; 202. Adjusting seat; 203. Spacer; 204. First pressing plate; 205. Hinge seat; 206. Hinge plate; 207. Electric cylinder; 208. Limit tooth groove; 209. Adjusting push plate; 210. Connecting groove; 211. First spring; 212. Slide plate; 213. Limit rack portion;

[0036] 3. Second clamping assembly; 301. Second pressing plate; 302. Rotating threaded cylinder; 303. First sliding column; 304. Placing table; 305. Through hole; 306. Vertical sliding groove; 307. Guide hole; 308. Guide rod;

[0037] 4. Test assembly; 401. Guide sliding groove; 402. Cross bar; 403. Second spring; 404. Movable seat; 405. Second sliding column; 406. Rotating cam ring;

[0038] 5. Driving assembly; 501. Screw; 502. Driven bevel gear; 503. Driving bevel gear; 504. Motor;

[0039] 6. One-way transmission assembly; 601. Guide ring groove; 602. Fixed column; 603. First ratchet pawl; 604. Torsion spring; 605. Ratchet ring; 606. Second ratchet pawl; 607. Third spring. Detailed implementation mode

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0042] In an embodiment of the present invention, referring to Figure 1 and Figure 4 , a stretching test machine for dressing patches includes a workbench 1. A second clamping assembly 3 is provided in the middle of the workbench 1. A plurality of first clamping assemblies 2 are circumferentially distributed on the workbench 1. The plurality of first clamping assemblies 2 clamp both ends of a plurality of dressing patches in cooperation with the second clamping assembly 3. A test assembly 4 cooperating with the first clamping assembly 2 is provided on the workbench 1. A driving assembly 5 cooperating with the second clamping assembly 3 is provided at the bottom of the workbench 1. A one-way transmission assembly 6 is provided between the second clamping assembly 3 and the test assembly 4.

[0043] In this embodiment, through the cooperation of the second clamping assembly 3 and the driving assembly 5, the ends of several dressing patches can be centrally clamped. Through the first clamping assembly 2, the outer ends of the corresponding dressing patches can be individually clamped. At the same time, according to the different specifications of the dressing patches, the clamping positions of the outer ends of the dressing patches can be adaptively adjusted to meet the rapid clamping process of dressing patches of different specifications. Through the cooperation of the driving assembly 5 and the one-way transmission assembly 6, after the ends of several dressing patches are centrally clamped, the first clamping assembly 2 can be driven to gradually move away from the second clamping assembly 3. According to the actual tensile test requirements, single tensile tests or cyclic tensile tests can be performed on multiple dressing patches to meet the simulation test requirements of different scenarios, improve the applicability of the device, and have the effects of centralized clamping, fast and stable clamping, efficient testing, meeting different test requirements, reliable structure, convenient operation, and simple and practical use;

[0044] Among them, a protective ring 101 is installed on the outer side wall of the workbench 1. Through the protective ring 101, protection can be carried out during the stretching process of the dressing patch, preventing the fractured dressing patch from flying onto the staff during stretching, reducing the risk during the test process, and improving the safety of the device. A plurality of bottom columns 102 are fixedly installed at the bottom of the workbench 1 to stably support the device. A controller 103 electrically connected to the electrical equipment inside the device is provided on the outer side wall of the protective ring 101. Through the controller 103, the staff can control the start and stop of the electrical equipment inside the device and perform tensile tests on the dressing patch with different requirements.

[0045] In an embodiment of the present invention, refer to Figures 1-4 , the first clamping assembly 2 includes a mounting frame 201 circumferentially distributed on the workbench 1. An adjusting seat 202 is slidably provided on the mounting frame 201. A hinge seat 205 is provided on the adjusting seat 202. A first pressing plate 204 is movably provided above the adjusting seat 202 on the side of the hinge seat 205 close to the middle of the workbench 1. Gaskets 203 are provided on the sides of the adjusting seat 202 and the first pressing plate 204 close to each other. The upper part of the first pressing plate 204 is connected with a hinge plate 206 rotatably matched with the hinge seat 205. An electric cylinder 207 is connected between the end of the adjusting seat 202 away from the first pressing plate 204 and the hinge plate 206. A displacement adjustment module is provided between the mounting frame 201 and the adjusting seat 202;

[0046] The position adjustment module includes limiting tooth grooves 208 symmetrically arranged on both side walls of the mounting frame 201. Inside the adjustment seat 202, connection grooves 210 are symmetrically provided. A sliding plate 212 is slidably arranged in the connection groove 210. A first spring 211 is connected between the sliding plate 212 and the connection groove 210. One side of the sliding plate 212 away from the connection groove 210 is connected with a T-shaped adjustment push plate 209. A limiting rack portion 213 that is movably engaged with the limiting tooth groove 208 is provided at one end of the adjustment push plate 209 close to the sliding plate 212.

[0047] In this embodiment, in the initial state, the electric cylinder 207 is in a contracted state, and the first pressing plate 204 is perpendicular to the adjustment seat 202. At this time, the limiting rack portion 213 is engaged with the limiting tooth groove 208, and the adjustment seat 202 and the mounting frame 201 are relatively fixed. After the outer end of the dressing patch is placed on the adjustment seat 202, the electric cylinder 207 extends and pushes the hinge plate 206 to rotate upward. The hinge plate 206 drives the first pressing plate 204 to rotate clockwise by means of rotational cooperation with the hinge seat 205. The first pressing plate 204 clamps the outer end of the dressing patch by cooperating with the adjustment seat 202, and rapid clamping of the outer end of the dressing patch can be achieved.

[0048] When the size of the dressing patch is larger or smaller, the position of the adjustment seat 202 needs to be adaptively adjusted to meet the effective clamping requirement for the outer end of the dressing patch.

[0049] Specifically: Push the adjustment push plate 209 into the adjustment seat 202. The adjustment push plate 209 drives the sliding plate 212 to move into the connection groove 210. The first spring 211 is stressed and contracts. At the same time, the adjustment push plate 209 releases the engagement between the limiting rack portion 213 and the limiting tooth groove 208 by driving the limiting rack portion 213 to move synchronously. At this time, according to the size of the dressing patch, push the adjustment push plate 209 along the length direction of the mounting frame 201. The adjustment push plate 209 drives the adjustment seat 202 to move synchronously by being connected with the sliding plate 212 and the sliding cooperation between the sliding plate 212 and the connection groove 210. The adjustment seat 202 can be moved to a suitable position. Release the adjustment push plate 209. The first spring 211 extends outward and pushes the sliding plate 212 to move outward. The sliding plate 212 drives the adjustment push plate 209 to move outward synchronously, driving the limiting rack portion 213 to move synchronously, so that the limiting rack portion 213 is engaged with the limiting tooth groove 208 again, thereby realizing the fixation of the position of the adjustment seat 202 relative to the mounting frame 201, meeting the clamping requirements for dressing patches of different sizes, and improving the applicability of the device.

[0050] Wherein, the width of the meshing area between the limit rack portion 213 and the limit tooth groove 208 is smaller than the moving distance of the adjusting push plate 209, which can ensure the disengagement of the meshing between the limit rack portion 213 and the limit tooth groove 208 when the adjusting push plate 209 moves into the connecting groove 210; gaskets 203 are provided on one side of the adjusting seat 202 and the first pressing plate 204 close to each other. By providing the gaskets 203, the clamping effect of the dressing patch can be improved, and the phenomenon of slippage of the dressing patch during the stretching process can be avoided. Six mounting frames 201 can be provided, which is convenient for testing multiple dressing patches in one operation and can make obvious comparisons of the test results.

[0051] In an embodiment of the present invention, referring to Figures 1-10 , the second clamping assembly 3 includes a placement table 304 provided in the middle of the workbench 1. A through hole 305 is provided in the middle of the placement table 304. A number of vertical sliding grooves 306 are circumferentially distributed on the through hole 305. A number of guide holes 307 are circumferentially distributed on the outer edge of the placement table 304. A second pressing plate 301 is movably provided on the placement table 304. A number of guide rods 308 slidably engaged with the guide holes 307 are circumferentially distributed at the bottom of the second pressing plate 301. A rotating threaded cylinder 302 movably provided inside the through hole 305 is rotatably provided on the second pressing plate 301. A number of first sliding columns 303 slidably engaged with the vertical sliding grooves 306 are provided on the outer wall of the rotating threaded cylinder 302.

[0052] The driving assembly 5 includes a screw rod 501 rotatably provided inside the workbench 1. The top end of the screw rod 501 is threadedly connected to the rotating threaded cylinder 302. The bottom end of the screw rod 501 is connected with a driven bevel gear 502. A motor 504 is installed at the bottom of the workbench 1. The output end of the motor 504 is connected with a driving bevel gear 503 meshed with the driven bevel gear 502.

[0053] In this embodiment, in the initial state, the second pressing plate 301 and the rotating threaded cylinder 302 are at the highest point. At this time, the first sliding column 303 is at the highest point of the vertical sliding groove 306, and the second pressing plate 301 and the placement table 304 are far away from each other. A plurality of dressing patches are circumferentially distributed on the placement table 304 and the ends of the dressing patches are placed at the corresponding positions of the placement table 304;

[0054] The staff controls the operation of the motor 504 through the controller 103. The motor 504 drives the driving bevel gear 503 to rotate forward. The driving bevel gear 503 drives the screw rod 501 to rotate forward by meshing with the driven bevel gear 502. The screw rod 501 drives the rotating threaded cylinder 302 to move downward by means of threaded cooperation with the rotating threaded cylinder 302 and sliding cooperation between the first sliding column 303 and the vertical sliding groove 306. The rotating threaded cylinder 302 drives the second pressing plate 301 to move downward by means of rotational cooperation with the second pressing plate 301 and sliding cooperation between the guiding hole 307 and the guiding rod 308. The second pressing plate 301 clamps the ends of a plurality of dressing patches by cooperating with the placing table 304;

[0055] After the tensile test of the dressing patch is completed, the motor 504 drives the driving bevel gear 503 to rotate reversely. The driving bevel gear 503 drives the screw rod 501 to rotate reversely by meshing with the driven bevel gear 502. The screw rod 501 drives the rotating threaded cylinder 302 to move upward by means of threaded cooperation with the rotating threaded cylinder 302 and sliding cooperation between the first sliding column 303 and the vertical sliding groove 306. The rotating threaded cylinder 302 drives the second pressing plate 301 to move upward by means of rotational cooperation with the second pressing plate 301 and sliding cooperation between the guiding hole 307 and the guiding rod 308. The second pressing plate 301 releases the clamping of the end of the dressing patch by moving away from the placing table 304, facilitating the removal of the dressing patch after the test and the re-placement of the dressing patch to be tested.

[0056] Wherein, both the second pressing plate 301 and the placing table 304 are arranged on a regular polygon plate. The number of sides of the second pressing plate 301 is the same as that of the placing table 304, and the number of sides of the second pressing plate 301 is the same as the number of the first clamping assemblies 2, so as to realize the corresponding clamping of both ends of a plurality of dressing patches.

[0057] In an embodiment of the present invention, referring to Figures 1-10 , the test assembly 4 includes guiding sliding grooves 401 circumferentially distributed on the workbench 1. A cross bar 402 is installed in the guiding sliding grooves 401. A movable seat 404 connected to the corresponding installation frame 201 is slidably arranged in the cross bar 402. A second spring 403 sleeved outside the cross bar 402 is connected between the movable seat 404 and the guiding sliding grooves 401. A second sliding column 405 is installed at the bottom of the movable seat 404. A rotating cam ring 406 is rotatably arranged inside the workbench 1. The outer edge of the rotating cam ring 406 is in movable abutment with the second sliding column 405;

[0058] The one-way transmission assembly 6 includes a guiding ring groove 601 arranged inside the through hole 305. The guiding ring groove 601 communicates with the bottom end of the vertical sliding groove 306. A plurality of fixing columns 602 are circumferentially arranged on the inner side of the through hole 305. A first ratchet pawl 603 which is in movable abutment with the bottom of the guiding ring groove 601 is rotatably arranged on the fixing column 602. One side wall of the first ratchet pawl 603 is coplanar with the side wall of the vertical sliding groove 306. A torsion spring 604 is connected between the first ratchet pawl 603 and the fixing column 602. A ratchet ring 605 is arranged on the outer wall of the bottom of the rotary threaded cylinder 302. A plurality of second ratchet pawls 606 which are in movable abutment with the ratchet ring 605 are circumferentially distributed inside the rotary cam ring 406. A third spring 607 is connected between the second ratchet pawl 606 and the rotary cam ring 406.

[0059] In this embodiment, in the initial state, the rotary threaded cylinder 302 is located at the highest point. The outer end of the first ratchet pawl 603 abuts against the bottom of the guiding ring groove 601. The second spring 403 is in its original length. The second sliding column 405 is close to the center of the rotary cam ring 406. At this time, the second pressing plate 301 and the placing table 304 are far away from each other. A plurality of dressing patches are circumferentially distributed on the placing table 304 and the ends of the dressing patches are placed at corresponding positions on the placing table 304.

[0060] The staff controls the operation of the motor 504 through the controller 103. The motor 504 drives the driving bevel gear 503 to rotate forward. The driving bevel gear 503 drives the screw rod 501 to rotate forward by meshing with the driven bevel gear 502. The screw rod 501 drives the rotary threaded cylinder 302 to move downward through the threaded fit with the rotary threaded cylinder 302 and the sliding fit between the first sliding column 303 and the vertical sliding groove 306. The rotary threaded cylinder 302 drives the second pressing plate 301 to move downward through the rotational fit with the second pressing plate 301 and the sliding fit between the guiding hole 307 and the guiding rod 308. The second pressing plate 301 clamps the ends of a plurality of dressing patches through the cooperation with the placing table 304.

[0061] When the second pressing plate 301 moves downward to the lowest point, the first sliding column 303 starts to slide fit with the guiding ring groove 601. Due to the sliding fit between the first sliding column 303 and the guiding ring groove 601, at this time, the rotary threaded cylinder 302 is in a rotatable state.

[0062] When the screw rod 501 continues to rotate, the screw rod 501 drives the rotary threaded cylinder 302 to rotate through the threaded connection with the rotary threaded cylinder 302 and the movable contact between the first sliding column 303 and the first ratchet pawl 603. The rotary threaded cylinder 302 drives the first sliding column 303 and the ratchet ring 605 to rotate synchronously. The ratchet ring 605 drives the rotary cam ring 406 to rotate synchronously through the abutment with the second ratchet pawl 606 and the rotational fit between the rotary cam ring 406 and the workbench 1.

[0063] Wherein, when the first sliding column 303 rotates forward and the first sliding column 303 contacts the side wall of the first pawl 603 away from the vertical sliding groove 306, the first sliding column 303 can push the first pawl 603 to rotate upward, the torsion spring 604 is stressed and stretched, and the first pawl 603 closes the connection point of the vertical sliding groove 306 and the guide ring groove 601 by rotating upward, so that the guide ring groove 601 is in a closed-loop state, and the first sliding column 303 can only rotate within the guide ring groove 601. When the first sliding column 303 continues to rotate without contacting the first pawl 603, the torsion spring 604 contracts and drives the first pawl 603 to rotate downward to reopen the connection point of the vertical sliding groove 306 and the guide ring groove 601;

[0064] Since a number of protrusions are circumferentially provided on the outer edge of the rotating cam ring 406, according to the test requirements of the dressing patch, different tensile test requirements of the dressing patch can be met by controlling the rotation angle of the rotating cam ring 406;

[0065] Specifically: when a single tensile test needs to be performed on the dressing patch, the staff controls the working time of the motor 504 through the controller 103. The rotating cam ring 406 drives the movable seat 404 to move away from the placing table 304 along the cross bar 402 by means of the movable contact with the second sliding column 405 and the connection of the second spring 403 with the movable seat 404. When the movable seat 404 moves to the end of the guide sliding groove 401 away from the placing table 304, the second spring 403 extends in the direction of the placing table 304 and pushes the movable seat 404 to approach the placing table 304 along the cross bar 402. The second sliding column 405 is always in contact with the outer wall of the rotating cam ring 406. When the second sliding column 405 moves to the end of the outer edge of the rotating cam ring 406 closest to the placing table 304, the motor 504 stops working and the rotating cam ring 406 stops rotating, so that the rotation of the rotating cam ring 406 at the corresponding angle can be realized, thereby realizing the single tensile test of the dressing patch, and the single tensile test results of a number of dressing patches can be visually observed;

[0066] When a cyclic tensile test needs to be performed on the dressing patch, the rotating cam ring 406 drives the movable seat 404 to move away from the placement table 304 along the cross bar 402 by means of the movable contact with the second sliding column 405 and the connection between the second spring 403 and the movable seat 404. When the movable seat 404 moves to one end of the guiding sliding groove 401 away from the placement table 304, the second spring 403 extends in the direction of the placement table 304 and pushes the movable seat 404 to approach the placement table 304 along the cross bar 402. The second sliding column 405 is always in contact with the outer wall of the rotating cam ring 406, and the reset of the movable seat 404 can be achieved. Since a number of protrusions are circumferentially provided on the outer edge of the rotating cam ring 406, during the continuous rotation of the rotating cam ring 406, the reciprocating movement of the movable seat 404 on the cross bar 402 can be achieved by means of the movable contact between the rotating cam ring 406 and the second sliding column 405 and the connection between the second spring 403 and the movable seat 404. The movable seat 404 drives the first clamping assembly 2 to reciprocate synchronously by reciprocating on the cross bar 402. The first clamping assembly 2 performs several times of stretching and releasing on one end of the dressing patch by reciprocating movement, so as to realize the cyclic tensile test of the dressing patch, meet the simulation of the dressing patch for special scenarios, and facilitate better observation of the tensile performance of the dressing patch;

[0067] After the tensile test of the dressing patch is completed, the staff controls the motor 504 to rotate reversely through the controller 103. The motor 504 drives the driving bevel gear 503 to rotate reversely. The driving bevel gear 503 drives the screw rod 501 to rotate synchronously by meshing with the driven bevel gear 502;

[0068] At the initial stage of the reverse rotation of the screw 501, the first sliding column 303 and the guide ring groove 601 are still in a sliding state. At this time, the screw 501 drives the rotating threaded barrel 302 to rotate reversely synchronously. When the first sliding column 303 rotates reversely and contacts one side wall of the first ratchet 603 close to the vertical sliding groove 306, since the first ratchet 603 can only rotate in the direction close to the vertical sliding groove 306, the sliding of the first sliding column 303 on the guide ring groove 601 is in a stagnant state. Since the side wall of the first ratchet 603 and the side wall of the vertical sliding groove 306 are coplanar, the first sliding column 303 corresponds to the vertical sliding groove 306 at this time. When the screw 501 continues to rotate reversely, the screw 501 drives the rotating threaded barrel 302 to move upward through the threaded connection with the rotating threaded barrel 302 and the sliding fit of the first sliding column 303 and the vertical sliding groove 306. The rotating threaded barrel 302 pushes the second pressing plate 301 to move upward through the rotational fit with the second pressing plate 301 and the sliding fit of the guide hole 307 and the guide rod 308. The second pressing plate 301 releases the clamping of the end of the dressing patch by moving away from the vertical sliding groove 306. Then, by controlling the contraction of the electric cylinder 207, the first pressing plate 204 can be rotated upward, and the first pressing plate 204 releases the clamping of the outer end of the dressing patch by moving away from the adjusting seat 202, which is convenient for the removal of the dressing patch and the placement of the dressing patch to be tested.

[0069] Among them, the number of protrusions of the rotating cam ring 406 is the same as the number of the second sliding columns 405, which can ensure the synchronous movement of several first clamping components 2 and realize the synchronous testing of multiple dressing patches.

[0070] In an embodiment of the present invention, refer to Figures 1-10 , a method for using a stretching testing machine for dressing patches includes the following steps:

[0071] Step S1: The second clamping component 3 centrally clamps one end of multiple dressing patches through cooperation with the driving component 5;

[0072] Step S2: The first clamping component 2 clamps the outer end of the corresponding dressing patch correspondingly;

[0073] Step S3: According to the test requirements, the driving component 5 performs a single stretching test or a cyclic stretching test on multiple dressing patches through cooperation with the one-way transmission component 6.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stretching testing machine for dressing patches, comprising a workbench, characterized in that, A second clamping assembly is provided in the middle of the workbench. A number of first clamping assemblies are circumferentially distributed on the workbench. The two ends of a number of dressing patches are clamped by the cooperation of the number of first clamping assemblies and the second clamping assembly. A test assembly is provided on the workbench and is matched with the first clamping assembly. A driving assembly is provided at the bottom of the workbench and is matched with the second clamping assembly. A one-way transmission assembly is provided between the second clamping assembly and the test assembly; The second clamping assembly includes a placement table arranged in the middle of the workbench. A through hole is provided in the middle of the placement table. A number of vertical sliding grooves are circumferentially distributed on the through hole. A number of guide holes are circumferentially distributed on the outer edge of the placement table. A second pressing plate is movably arranged on the placement table. A number of guide rods slidably matched with the guide holes are circumferentially distributed at the bottom of the second pressing plate. A rotating threaded cylinder movably arranged inside the through hole is rotatably arranged on the second pressing plate. A number of first sliding columns slidably matched with the vertical sliding grooves are arranged on the outer wall of the rotating threaded cylinder; The test assembly includes guide sliding grooves circumferentially distributed on the workbench. A cross bar is installed in the guide sliding grooves. A movable seat connected to the corresponding installation frame is slidably arranged inside the cross bar. A second spring sleeved on the outer side of the cross bar is connected between the movable seat and the guide sliding grooves. A second sliding column is installed at the bottom of the movable seat. A rotating cam ring is rotatably arranged inside the workbench. The outer edge of the rotating cam ring is movably abutted against the second sliding column; The one-way transmission assembly includes a guide ring groove arranged inside the through hole. The guide ring groove is communicated with the bottom end of the vertical sliding groove. A number of fixed columns are circumferentially arranged inside the through hole. A first ratchet pawl movably abutted against the bottom of the guide ring groove is rotatably arranged on the fixed column. One side wall of the first ratchet pawl is coplanar with the side wall of the vertical sliding groove. A torsion spring is connected between the first ratchet pawl and the fixed column. A ratchet ring is arranged on the outer wall at the bottom of the rotating threaded cylinder. A number of second ratchet pawls movably abutted against the ratchet ring are circumferentially distributed inside the rotating cam ring. A third spring is connected between the second ratchet pawl and the rotating cam ring.

2. The tensile testing machine for dressing patches according to claim 1, characterized in that, The first clamping assembly includes installation frames circumferentially distributed on the workbench. An adjusting seat is slidably arranged on the installation frame. A hinge seat is arranged on the adjusting seat. A first pressing plate located on the side of the hinge seat close to the middle of the workbench is movably arranged above the adjusting seat. Gaskets are arranged on the sides of the adjusting seat and the first pressing plate close to each other. An articulated plate rotatably matched with the hinge seat is connected to the upper part of the first pressing plate. An electric cylinder is connected between the end of the adjusting seat far from the first pressing plate and the articulated plate. A displacement adjusting module is arranged between the installation frame and the adjusting seat.

3. The dressing patch tensile testing machine according to claim 2, wherein, The position adjusting module includes limiting tooth grooves symmetrically arranged on the two side walls of the installation frame. Connecting grooves are symmetrically arranged inside the adjusting seat. A sliding plate is slidably arranged in the connecting groove. A first spring is connected between the sliding plate and the connecting groove. A T-shaped adjusting push plate is connected to the side of the sliding plate far from the connecting groove. A limiting rack part movably meshed with the limiting tooth groove is arranged at the end of the adjusting push plate close to the sliding plate.

4. The tensile testing machine for dressing patches according to claim 1, characterized in that, The driving assembly includes a screw rod rotatably arranged inside the workbench. The top end of the screw rod is threadedly connected to the rotating threaded cylinder. A driven bevel gear is connected to the bottom end of the screw rod. A motor is installed at the bottom of the workbench. The output end of the motor is connected with a driving bevel gear meshed with the driven bevel gear.

5. The stretching test machine for dressing patches according to claim 1, wherein Both the second pressing plate and the placement table are provided with regular polygon plates, and the number of sides of the second pressing plate is the same as that of the placement table.

6. The stretching test machine for dressing patches according to claim 1, wherein A number of protrusions are circumferentially provided on the outer edge of the rotating cam ring, and the number of protrusions of the rotating cam ring is the same as the number of the second sliding columns.

7. A method for using the dressing stretching test machine according to any one of claims 1-6, characterized in that, It includes the following steps: Step S1, the second clamping assembly centrally clamps one end of a plurality of dressing patches by cooperating with the driving assembly; Step S2, the first clamping assembly correspondingly clamps the outer ends of the corresponding dressing patches; Step S3, according to the test requirements, the driving assembly performs a single tensile test or a cyclic tensile test on a plurality of dressing patches by cooperating with the one-way transmission assembly.

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