A leather dynamic performance detection device

Abstract

A kind of leather dynamic performance detection equipment belongs to leather detection equipment field, including test table, mounting bracket, sample clamp and waterproof performance detection mechanism, mounting bracket includes two installation blocks oppositely arranged, and the top surface of installation block is recessed downward and is formed with installation groove;Sample clamp is preassembled on mounting bracket by the cooperation of limiting block and installation groove;Waterproof performance detection mechanism includes control console, fixed part, movable part and locating block, control console is arranged on test table;Fixed part is fixedly arranged;Movable part is connected with control console, driven by control console to move away or close to fixed part;Locating block is provided with two, respectively set on the opposite surface of fixed part and movable part, and the top surface of locating block is recessed downward and is formed with locating groove matched with limiting block, sample clamp is transferred to locating groove after installing sample on mounting bracket. Compared with the operation difficulty of directly installing the measured leather in the measuring instrument of traditional equipment, the measuring efficiency and the accuracy of detection result are improved.

Description

Technical Field

[0001] This utility model belongs to the field of leather testing equipment, specifically a leather dynamic performance testing device. Background Technology

[0002] The dynamic waterproof performance of footwear upper materials during flexure is one of the important standards for evaluating shoe quality. The waterproof performance of leather is usually tested according to the method described in GB / T 390.17-2008 "Test Methods for Waterproof Performance of Footwear Uppers". This requires bending the leather to be tested into a semi-circular groove and fixing it to the ends of two opposing cylinders, immersing the cylinders in water, and subjecting them to reciprocating motion at a constant speed and a specified shape. A dynamic waterproof flexure testing machine for leather (CN 210639032 U) is a common instrument in the prior art that can automatically perform waterproof flexure tests on leather. However, traditional instruments require mounting the leather to be tested in a confined testing space, which is difficult to operate. The limited space also makes it difficult for operators to effectively adjust the posture of the leather on the clamps, making it difficult to ensure that the tops of the leather remain flush after bending. This can easily lead to liquid overflowing from the lower end of the tank into the leather during testing, resulting in errors in the test results. Improvements are needed. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for testing the dynamic performance of leather.

[0004] The present invention adopts the following technical solution: A leather dynamic performance testing device includes a test stand, a mounting frame, a sample clamp, and a waterproof performance testing mechanism. The mounting bracket is set on the test bench and includes a base, a fixed plate, a movable plate, and mounting blocks. The base is set on the test bench; the fixed plate is set vertically on the base; the movable plate is set parallel to the fixed plate on the base and can move in the direction of approaching or moving away from the fixed plate; there are two mounting blocks, which are respectively set on the opposite surfaces of the fixed plate and the movable plate, and the top surface of the mounting block is recessed and formed with a mounting groove. The sample fixture includes a clamping base for the sample to be wrapped around its outside, a clamping collar detachably mounted on the clamping base to clamp the sample on the clamping base, and a limiting block mounted on the clamping base that is adapted to the shape of the mounting groove. The sample fixture is pre-installed on the mounting frame through the cooperation of the limiting block and the mounting groove. The waterproof performance testing mechanism includes a control console, a fixed part, a movable part, and positioning blocks. The control console is set on the test platform; the fixed part is fixedly arranged; the movable part is connected to the control console and is driven by the control console to move away from or closer to the fixed part; there are two positioning blocks, which are respectively set on the opposite surfaces of the fixed part and the movable part. The top surface of the positioning block is recessed and formed with a positioning groove that matches the limiting block. After the sample is installed on the mounting frame, the sample holder is transferred to the positioning groove.

[0005] Preferably, the mounting bracket further includes a limiting plate and a guide rail. The limiting plate is parallel to the fixed plate and is disposed on the base. The guide rail extends along the length of the base and is connected between the fixed plate and the limiting plate. The movable plate is movably disposed on the guide rail.

[0006] Preferably, it also includes a torque measuring mechanism, which includes a lead screw assembly, a slider, a force gauge, and a rotating wheel. The lead screw assembly is mounted on the base and arranged along the travel direction parallel to the moving plate. The slider is movably mounted on the lead screw assembly. The force gauge is mounted on the slider and moves with it. The end of the force gauge passes through the limiting plate and is connected to the moving plate to drive the moving plate to move. The rotating wheel is connected to the lead screw assembly and drives it to rotate.

[0007] Preferably, it also includes a stroke measuring mechanism, which includes a digital dial indicator that is fixedly mounted on the limiting plate and whose extended end is connected to the movable plate and can extend and retract with it.

[0008] Preferably, the waterproof performance testing mechanism further includes a water tank, a conductive block, and a lifting assembly. The water tank is electrically connected to the control console and can be lifted and lowered below the fixed part and the movable part. The conductive block can move freely above the water tank to contact the inside of the sample held by the sample clamp and is connected to the control console via a metal wire. The lifting assembly is disposed on the test platform and connected to the water tank to drive the water tank to rise and fall.

[0009] Preferably, the lifting assembly includes a lifting rod, a sleeve, an extension block, an extension rod, and a limiting pin. Several lifting rods are provided and vertically mounted on the test platform. A sleeve is provided on the bottom surface of the water tank in a one-to-one correspondence with each lifting rod and is fitted over the outside of the lifting rod. An extension block is provided on the test platform and has a vertically extending lifting groove formed on it. The extension rod extends outward from the side of the water tank and passes through the lifting groove. The limiting pin passes through the extension block in a horizontal direction perpendicular to the extension rod to support the extension rod.

[0010] Preferably, the positioning block includes a fixing section extending outward from the fixing part and the movable part, and a positioning section extending downward from the end of the fixing section, and the mounting groove is recessed downward from the top of the positioning part.

[0011] Preferably, the width of the water tank is greater than the maximum distance between the two positioning segments.

[0012] Preferably, the positioning blocks are provided in several pairs, and are evenly spaced along the extension direction of the fixed part and the movable part. The conductive block is arranged in one-to-one correspondence with each pair of positioning blocks and is independently connected to the control console.

[0013] Preferably, the control console includes an operation panel, a telescopic rod, and electrical contacts. The operation panel is set on the control console and can preset the movement stroke and the number of back-and-forth movements of the movable part. The telescopic rod is set inside the control console and extends outward to connect with the movable part and drive the movable part to move back and forth. Several electrical contacts are provided and are connected to the conductive blocks one by one.

[0014] Because the test method in GB / T 3903.17-2008 requires determining the stroke based on the hardness of the material, it is necessary to measure the force applied to the leather to be tested when the cylinder moves a fixed length using a force measuring device, and to calculate the required stroke length. Individual measurements are time-consuming and labor-intensive, and different measuring tools use different fixtures. Changing fixtures between different devices increases the complexity of the testing steps, the difficulty of operation, and the testing time.

[0015] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: by fixing the clamping base of the sample fixture to the mounting frame in advance, and then wrapping the leather to be tested around the outside of the clamping base and installing the clamping collar to fix the end of the leather to be tested between the clamping base and the clamping collar, the pre-installation of the leather to be tested is achieved. Compared with the traditional equipment that directly installs the leather to be tested inside the measuring instrument, the operation difficulty is lower, and it is easier for the staff to adjust the sample to be tested so that the two end faces are flush after bending to ensure the quality of clamping, avoid accidental leakage in subsequent tests, and improve measurement efficiency and accuracy of test results. The driving moving plate moves along the direction close to the fixed plate, and through the torque measuring mechanism and the stroke measuring mechanism, the hardness can be measured while the sample is pre-clamped to determine the subsequent flexural stroke. This eliminates the need to change the test sample to other equipment for measurement, further improving the testing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 Top view of the working state of this utility model Figure 1 ; Figure 3 Top view of the working state of this utility model Figure 2 ; Figure 4 This is a schematic diagram of the mounting bracket of this utility model. Figure 1 ; Figure 5This is a schematic diagram of the mounting bracket of this utility model. Figure 2 ; Figure 6 This is a schematic diagram of the structure of the water tank of this utility model when it is lowered; Figure 7 This is a schematic diagram of the sample clamp of this utility model; Figure 8 This is a schematic diagram of the installation of the sample clamp of this utility model; In the diagram: 1-Test stand; 2-Mounting frame; 21-Base; 22-Fixing plate; 23-Moving plate; 24-Mounting block; 25-Mounting groove; 26-Limiting plate; 27-Guide rail; 3-Sample clamp; 31-Clamping base; 32-Clamping collar; 33-Limiting block; 4-Waterproof performance testing mechanism; 41-Control console; 411-Operating panel; 412-Telescopic rod; 413-Electrical contact; 42-Fixing part; 43-Moving part Moving part; 44-Positioning block; 441-Fixed section; 442-Positioning section; 45-Water tank; 46-Conductive block; 47-Lifting assembly; 471-Lifting rod; 472-Sleeve; 473-Extension block; 474-Lifting groove; 475-Extension rod; 476-Limit pin; 48-Positioning groove; 5-Torque measuring mechanism; 51-Screw assembly; 52-Slider; 53-Force gauge; 54-Rotating wheel; 6-Stroke measuring mechanism. Detailed Implementation

[0017] The present invention will be further described below through specific embodiments.

[0018] Reference Figures 1 to 8 As shown, a leather dynamic performance testing device includes a test stand 1, a mounting frame 2, a sample clamp 3, a waterproof performance testing mechanism 4, a torque measuring mechanism 5, and a stroke measuring mechanism 6.

[0019] Mounting bracket 2 is mounted on test bench 1 and includes a base 21, a fixed plate 22, a movable plate 23, mounting blocks 24, a limiting plate 26, and a guide rail 27. The base 21 is mounted on test bench 1; the fixed plate 22 is vertically mounted on the base 21; the movable plate 23 is parallel to the fixed plate 22 and mounted on the base 21, and can move towards or away from the fixed plate 22; four pairs of mounting blocks 24 are respectively mounted on the opposite surfaces of the fixed plate 22 and the movable plate 23, and each mounting block 24 has a recessed mounting groove 25 on its top surface. Specifically, the limiting plate 26 is parallel to the fixed plate 22 and mounted on the base 21; the guide rail 27 extends along the length of the base 21 and connects the fixed plate 22 and the limiting plate 26, and the movable plate 23 is movably mounted on the guide rail 27. Furthermore, the mounting groove 25 is dovetail-shaped.

[0020] The sample holder 3 includes a clamping base 31 around which the sample can be wrapped, a clamping collar 32 detachably mounted on the clamping base 31 to clamp the sample, and a limiting block 33 mounted on the clamping base 31 that matches the shape of the mounting groove 25. The sample holder 3 is pre-installed on the mounting frame 2 through the cooperation of the limiting block 33 and the mounting groove 25. Specifically, a bolt extends outward from the clamping base 31, and an internal thread adapted to the bolt is formed in the clamping collar 32. The bolt and the internal thread cooperate to clamp the end of the leather to be tested between the opposing surfaces of the clamping base 31 and the clamping collar 32, and the leather to be tested surrounds and forms an upward-opening sealed cavity.

[0021] The waterproof performance testing mechanism 4 includes a control console 41, a fixed part 42, a movable part 43, a positioning block 44, a water tank 45, a conductive block 46, and a lifting assembly 47. The control console 41 is mounted on the test bench 1; the fixed part 42 is fixedly arranged; the movable part 43 is connected to the control console 41 and is driven by the control console 41 to move away from or closer to the fixed part 42; four pairs of positioning blocks 44 are evenly spaced on the opposing surfaces of the fixed part 42 and the movable part 43. The top surface of each positioning block 44 is recessed downwards to form a positioning groove 48 that matches the limiting block 33. After the sample is mounted on the mounting frame 2, the sample holder 3 is transferred to the positioning groove 48. The positioning block 44 includes a fixed section 441 extending outwards from the fixed part 42 and the movable part 43, and a positioning section 442 extending downwards from the end of the fixed section 441. The positioning groove 48 extends from the positioning section 44... 2. The top surface is recessed downwards; the water tank 45 is electrically connected to the control console 41 and can be raised and lowered below the fixed part 42 and the movable part 43. When raised, the leather to be tested can be immersed in the water tank 45 and the internal cavity opening is still higher than the liquid level in the water tank 45. The width of the water tank 45 is greater than the maximum distance between the two positioning sections to ensure that the movable part 43 will not touch the inner wall of the water tank 45 when it moves; the conductive block 46 is set one-to-one with each pair of positioning blocks 44. It can move freely above the water tank 45 to contact the inside of the sample held by the sample clamp 3 and is connected to the control console 41 through a metal wire; the lifting assembly 47 is set on the test table 1 and connected to the water tank 45 to drive the water tank 45 to rise and fall.

[0022] Specifically, the lifting assembly 47 includes a lifting rod 471, a sleeve 472, an extension block 473, an extension rod 475, and a limiting pin 476. Several lifting rods 471 are provided and are vertically set on the test platform 1. The sleeves 472 are provided one-to-one with the lifting rods 471 on the bottom surface of the water tank 45 and are sleeved on the outside of the lifting rods 471. The extension block 473 is set on the test platform 1 and has a lifting groove 474 formed on it that extends vertically. The extension rod 475 extends outward from the side of the water tank 45 and passes through the lifting groove 474. The limiting pin 476 passes through the extension block 473 in a horizontal direction and perpendicular to the extension rod 475 to support the extension rod 475.

[0023] Furthermore, the control console 41 includes an operation panel 411, a telescopic rod 412, and electrical contacts 413. The operation panel 411 is mounted on the control console 41 and can preset the travel distance and number of back-and-forth movements of the movable part 43. The telescopic rod 412 is located inside the control console 41 and extends outward to connect with the movable part 43 and drive the movable part 43 to move back and forth. Several electrical contacts 413 are provided and connected one-to-one with the conductive blocks 46. Meanwhile, the waterproof performance testing mechanism 4 is a common leather waterproof performance testing instrument in the prior art. Its structure and principle are directly known and obtained by those skilled in the art, and its structure and principle will not be further described here.

[0024] The torque measuring mechanism 5 includes a lead screw assembly 51, a slider 52, a force gauge 53, and a rotating wheel 54. The lead screw assembly 51 is mounted on the base 21 and arranged along the travel direction parallel to the moving plate 23. The slider 52 is movably mounted on the lead screw assembly. The force gauge 53 is mounted on the slider 52 and moves with it. The end of the force gauge 53 passes through the limiting plate 26 and is connected to the moving plate 23 to drive the moving plate 23 to move. The rotating wheel 54 is connected to the lead screw assembly 51 and drives it to rotate.

[0025] The stroke measuring mechanism 6 includes a digital dial indicator fixedly mounted on the limiting plate 26 and whose extended end is connected to the moving plate 23, allowing it to extend and retract with the plate. Driving the moving plate 23 to move towards the fixed plate 22, and through the torque measuring mechanism 5 and the stroke measuring mechanism 6, hardness can be measured while the sample is pre-clamped to determine the subsequent flexural stroke, eliminating the need to transfer the test sample to other equipment for measurement, thus further improving testing efficiency. Specifically, the force gauge 53 and the digital dial indicator are prior art and not the focus of this application; their structure and selection will not be further elaborated here.

[0026] In use, first install the two clamp bases of the sample clamp 3 onto the mounting block 24 of the mounting frame 2. Wrap the cut leather to be tested around the outside of the clamp base and lock the clamp collar. Then adjust the sample clamp 3 to fully clamp the end of the leather to be tested to ensure the cavity is airtight and the cavity opening edge is at the same height. Next, rotate the wheel 54 to drive the lead screw assembly 51 to rotate, thereby moving the force gauge 53 and pushing the moving plate 23 to move in the direction close to the fixed plate 22 to flex the leather to be tested. When a suitable degree of flexion is reached (avoiding excessive flexion that would cause the liquid in the water tank 45 to enter the leather from the top and affect the experimental results), record the torque and the stroke. Then transfer the sample clamp 3 from the mounting frame 2 to the positioning block 44, and place the conductive block 46 into the cavity surrounded by the leather to be tested, ensuring that the conductive block 46 is in contact with the leather. Then input the recorded stroke on the control panel 41 to determine the movement range of the moving part 43 and set the flexion frequency or number of times. Finally, the water tank 45 is raised by the extension rod 475 and fixed by the limiting pin 476, and the device can be started. When the leather leaks water, the conductive block 46 contacts the water and conducts electricity. The electrical contact 413 on the control panel 41 senses the conduction and records the number of flexes performed at the corresponding position of the conductive block 46 at that instant. This continues until all the leather leaks water, at which point the control moving part 43 stops and outputs the results. Compared with traditional equipment, this application has a lower operational difficulty by directly installing the leather to be tested inside the measuring instrument, and can ensure the quality of the clamping fixture, avoiding accidental leakage in subsequent tests, improving measurement efficiency and the accuracy of test results. At the same time, torque measurement and appropriate stroke determination can be performed with pre-loaded samples without the need for additional equipment, thus reducing workload and further improving work efficiency and the accuracy of test results. It has high practicality.

[0027] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model shall still fall within the scope of the patent of the present utility model.

Claims

1. A leather dynamic performance testing device, characterized in that: Includes a test bench, mounting frame, sample clamps, and waterproof performance testing mechanism. The mounting bracket is set on the test bench and includes a base, a fixed plate, a movable plate, and mounting blocks. The base is set on the test bench; the fixed plate is set vertically on the base; the movable plate is set parallel to the fixed plate on the base and can move in the direction of approaching or moving away from the fixed plate; there are two mounting blocks, which are respectively set on the opposite surfaces of the fixed plate and the movable plate, and the top surface of the mounting block is recessed and formed with a mounting groove. The sample fixture includes a clamping base for the sample to be wrapped around its outside, a clamping collar detachably mounted on the clamping base to clamp the sample on the clamping base, and a limiting block mounted on the clamping base that is adapted to the shape of the mounting groove. The sample fixture is pre-installed on the mounting frame through the cooperation of the limiting block and the mounting groove. The waterproof performance testing mechanism includes a control console, a fixed part, a movable part, and positioning blocks. The control console is set on the test platform; the fixed part is fixedly arranged; the movable part is connected to the control console and is driven by the control console to move away from or closer to the fixed part; there are two positioning blocks, which are respectively set on the opposite surfaces of the fixed part and the movable part. The top surface of the positioning block is recessed and formed with a positioning groove that matches the limiting block. After the sample is installed on the mounting frame, the sample holder is transferred to the positioning groove.

2. The leather dynamic performance testing device according to claim 1, characterized in that: The mounting bracket also includes a limiting plate and a guide rail. The limiting plate is parallel to the fixed plate and is disposed on the base. The guide rail extends along the length of the base and is connected between the fixed plate and the limiting plate. The movable plate is movably disposed on the guide rail.

3. The leather dynamic performance testing device according to claim 2, characterized in that: It also includes a torque measuring mechanism, which includes a lead screw assembly, a slider, a force gauge, and a rotating wheel. The lead screw assembly is mounted on the base and arranged along the travel direction parallel to the moving plate. The slider is movably mounted on the lead screw assembly. The force gauge is mounted on the slider and moves with it. The end of the force gauge passes through the limiting plate and is connected to the moving plate to drive the moving plate to move. The rotating wheel is connected to the lead screw assembly and drives it to rotate.

4. The leather dynamic performance testing device according to claim 3, characterized in that: It also includes a stroke measuring mechanism, which includes a digital dial indicator that is fixedly mounted on the limiting plate and whose extended end is connected to the movable plate and can extend and retract with it.

5. The leather dynamic performance testing device according to claim 1, characterized in that: The waterproof performance testing mechanism also includes a water tank, a conductive block, and a lifting assembly. The water tank is electrically connected to the control console and can be lifted and lowered below the fixed part and the movable part. The conductive block can move freely above the water tank to contact the inside of the sample held by the sample clamp and is connected to the control console through a metal wire. The lifting assembly is set on the test platform and connected to the water tank to drive the water tank to rise and fall.

6. The leather dynamic performance testing device according to claim 5, characterized in that: The lifting assembly includes a lifting rod, a sleeve, an extension block, an extension rod, and a limiting pin. Several lifting rods are provided and are vertically set on the test platform. The sleeve is set on the bottom surface of the water tank in a one-to-one correspondence with the lifting rod and is sleeved on the outside of the lifting rod. The extension block is set on the test platform and has a lifting groove formed on it that extends vertically. An extension rod extends outward from the side of the water tank and passes through the lifting groove; a limiting pin passes through the extension block in a horizontal and perpendicular direction to support the extension rod.

7. The leather dynamic performance testing device according to claim 5, characterized in that: The positioning block includes a fixed section extending outward from the fixed part and the movable part, and a positioning section extending downward from the end of the fixed section. The mounting groove is recessed downward from the top of the positioning part.

8. The leather dynamic performance testing device according to claim 7, characterized in that: The width of the water tank is greater than the maximum distance between the two positioning sections.

9. The leather dynamic performance testing device according to claim 5, characterized in that: The positioning blocks are arranged in several pairs, evenly spaced along the extension direction of the fixed part and the movable part. The conductive block is arranged in one-to-one correspondence with each pair of positioning blocks and is independently connected to the control console.

10. A leather dynamic performance testing device according to claim 9, characterized in that: The control console includes an operation panel, a telescopic rod, and electrical contacts. The operation panel is located on the control console and can preset the movement stroke and the number of back-and-forth movements of the movable part. The telescopic rod is located inside the control console and extends outward to connect with the movable part and drive the movable part to move back and forth. Several electrical contacts are provided and are connected to the conductive blocks one by one.

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