Sponge indentation hardness tester

Abstract

The utility model relates to the technical field of sponge detection, and discloses a sponge indentation hardness tester which comprises a base, a test platform is fixed on the base, and a pressure test component is arranged above the middle part of the test platform; and a plurality of detachable sponge limiting blocks are arranged on the test platform. The pressure testing assembly comprises a pressing block which is fixed to the bottom of a pressure sensor through a connecting part, and the upper portion of the pressure sensor is fixed to the middle of a lifting block. The two ends of the lifting block are fixed to the sliding blocks of the two vertically-arranged linear modules correspondingly. The position of the sponge can be limited through the sponge limiting block, so that the problem of inaccurate testing precision caused by the fact that the sponge is easy to deviate is solved; the pressure change point measured by the pressure sensor can be used as the initial height of the sponge, the pressing depth of the sponge can be effectively controlled, and the sponge testing precision can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sponge detection technical field, especially a kind of sponge indentation hardness tester. BACKGROUND

[0002] Due to the different components and contents of sponges, there are many types of sponges, including hard sponges and soft sponges. The hardness of sponges required by different sponge products in life is also quite different, such as the hardness of sponges required by mattress, sofa cushion, sponge mop and other sponge products is different. Therefore, it is necessary to test the hardness of sponges before making sponge products to determine whether this kind of sponge is suitable for making this sponge product. The existing sponge indentation hardness tester directly places the sample to be tested on the detection workbench, and drives the pressure plate to press the sample downward by the driving device. During the indentation process, the sample will deviate due to mechanical vibration of the equipment, which cannot guarantee the accuracy of the hardness test of the sample. At the same time, the initial position of the sponge, i.e. the height of the sponge, is not easy to confirm, which makes the accuracy of the sponge hardness test not accurate. SUMMARY

[0003] The utility model aims at providing a kind of sponge indentation hardness tester, the position of sponge can be limited by sponge limiting block, the problem that test accuracy is not accurate caused by the deviation of sponge is solved;The initial height of sponge can be used as the pressure change point measured by pressure sensor, which can effectively control the indentation depth of sponge and effectively improve the test accuracy of sponge.

[0004] The above technical purpose of the utility model is realized by the following technical scheme:

[0005] A kind of sponge indentation hardness tester, comprising a base, the base is fixed with test platform, the middle part of test platform is provided with pressure test assembly above;

[0006] A plurality of detachable sponge limiting blocks are provided on the test platform.

[0007] Place the sponge block to be tested on the test platform, then install the sponge limiting block at the corresponding position of the test platform to limit the sponge block, then the pressure test assembly tests the pressure of the sponge block, and the pressure value and the hardness value are converted accordingly.

[0008] The pressure test assembly comprises a pressing block, which is fixed at the bottom of the pressure sensor through a connecting part, and the upper part of the pressure sensor is fixed at the middle part of the lifting block. The two ends of the lifting block are respectively fixed on the sliding blocks of two vertically arranged linear modules. The lower end of the linear module is fixed on the base, and the upper end of the two linear modules is fixed through a cross beam. The servo motor of the linear module is electrically connected with the electric control display.

[0009] Through the technical scheme, two linear modules drive the lifting block to move up or down at the same time, the lifting block moves down to drive the pressing block to move down through the pressure sensor and the connecting part, after the pressing block moves down and presses against the tested sponge block, the sponge block provides an upward reaction force, the pressure sensor can transmit the pressure information received to the electric control display, and the electric control display can display the relative pressure value or the hardness value converted.

[0010] The utility model further sets up: a plurality of small holes of rectangular array are formed on the test platform,

[0011] The sponge limiting block is in "L" shape, and at least two plugs are fixed on the bottom surface of the sponge limiting block and are inserted into the corresponding small holes.

[0012] Through the technical scheme, the plugs are inserted into the small holes at different positions, so that different specifications and sizes of sponge blocks can be limited and positioned.

[0013] The utility model further sets up: the height of the sponge limiting block is not greater than one fifth of the thickness of the tested sponge block.

[0014] Through the technical scheme, the general indentation height of the sponge block during the hardness test is 75% of the thickness of the sponge block, so that the pressure test assembly can be prevented from contacting the sponge limiting block during the test, and the test precision is affected.

[0015] The utility model further sets up: a lifting block upper limiting block is fixed in the middle part of the cross beam.

[0016] Through the technical scheme, the linear module drives the lifting block to move up, and the lifting block upper limiting block can limit the upward amplitude of the lifting block.

[0017] The utility model further sets up: a displacement sensor is fixed in the lifting block upper limiting block, and a measuring end of the displacement sensor extends out of the lifting block upper limiting block. The displacement sensor is electrically connected with the electric control display.

[0018] When the lifting block moves up and contacts the displacement sensor, the displacement sensor can measure the relative height of the lifting block, so that the zero position of the lifting block is convenient to set.

[0019] The utility model has the following advantages:

[0020] Compared with the prior art, the sponge limiting block can limit the position of the sponge, and the problem that the sponge is easy to deviate and causes inaccurate test precision is solved.

[0021] Meanwhile, the sponge limiting block can be conveniently disassembled and installed at different positions of the test platform, and can limit sponge blocks of different sizes and specifications, and is suitable for strong applicability.

[0022] The pressure change point measured by the pressure sensor can be used as the initial height of the sponge, the pressure sinking depth of the sponge can be effectively controlled, and the sponge test precision can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the embodiment of the utility model;

[0024] Figure 2 It is Figure 1 It is a view of A;

[0025] Figure 3 It is Figure 1 It is a partial enlarged view of B;

[0026] Figure 4 It is Figure 1 It is a partial enlarged view of C.

[0027] Reference signs: 10, base;

[0028] 20, test platform; 201, small hole;

[0029] 30, pressure test assembly; 301, pressing block; 302, connecting part; 303, pressure sensor; 304, lifting block; 305, linear module; 306, sliding block; 307, crossbeam; 308, upper limiting block of lifting block; 309, displacement sensor;

[0030] 40, sponge limiting block; 401, bolt;

[0031] 90, sponge block. DETAILED DESCRIPTION

[0032] The specific embodiments of the utility model will be further described in detail in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0033] The following reference Figures 1 to 4 The embodiment of the utility model is explained:

[0034] A kind of sponge pressure sinking hardness tester, as Figure 1 It is shown, including base 10, the test platform 20 is fixed on the base 10, and the middle part of test platform 20 is provided with pressure test assembly 30 above;

[0035] The test platform 20 is provided with a plurality of detachable sponge limiting blocks 40.

[0036] The sponge block 90 to be tested is placed on the test platform 20, and then the sponge limiting blocks are installed at the corresponding positions of the test platform, so as to limit the sponge block, and then the pressure test assembly tests the sponge block, and the measured pressure value is converted into a hardness value.

[0037] As shown in Figure 2 , Figure 3 , the test platform 20 of the embodiment is formed with a plurality of small holes 201 in a rectangular array;

[0038] The sponge limiting block 40 is in the shape of "L", and at least two pins 401 are fixed on the bottom surface of the sponge limiting block 40, and the pins 401 are inserted into the corresponding small holes 201.

[0039] Through the above technical solution, the pins are inserted into the small holes at different positions, so that sponge blocks of different sizes can be limited and positioned.

[0040] The utility model further sets up: the height of sponge limiting block 40 is not greater than the one fifth of the thickness of the sponge block to be tested.

[0041] Through the above technical solution, the indentation height of the sponge block during the hardness test is generally 75% of the thickness of the sponge block, so that the contact between the pressure test assembly and the sponge limiting block during the test can be avoided, and the test precision is affected.

[0042] As shown in Figure 1 , Figure 4 , the pressure test assembly 30 of the embodiment comprises a pressing block 301, the pressing block 301 is fixed at the bottom of a pressure sensor 303 through a connecting part 302, and the upper part of the pressure sensor 303 is fixed at the middle part of a lifting block 304; the two ends of the lifting block 304 are respectively fixed on the sliding blocks 306 of two vertically arranged linear modules 305; the lower end of the linear module 305 is fixed on the base 10, and the upper ends of the two linear modules 305 are fixed through a cross beam 307. The servo motor of the linear module is electrically connected with an electric control display.

[0043] Through the above technical solution, the two linear modules simultaneously drive the lifting block to move upwards or downwards, the lifting block moves downwards to drive the pressing block to move downwards through the pressure sensor and the connecting part, after the pressing block moves downwards and is pressed against the sponge block to be tested, the sponge block provides an upward reaction force, the pressure sensor can transmit the pressure information to the electric control display, and the electric control display can display the relative pressure value or the hardness value after conversion. When the pressing block contacts the sponge block, the initial point of the pressure change measured by the pressure sensor is the thickness of the sponge block, and then the servo motor can accurately control the amplitude of the pressing block moving downwards driven by the linear module.

[0044] As shown in Figure 1The middle part of the cross beam 307 is fixed with a lifting block upper limiting block 308.

[0045] Through the technical scheme, the linear module drives the lifting block to move upward, and the lifting block upper limiting block can limit the upward moving range of the lifting block.

[0046] The lifting block upper limiting block 308 is fixed with a displacement sensor 309, and the measuring end of the displacement sensor 309 extends out of the lifting block upper limiting block 308. The displacement sensor is electrically connected with an electric control display.

[0047] When the lifting block moves upward and hits the displacement sensor, the displacement sensor can measure the relative height of the lifting block, so that the zero position of the lifting block is convenient to be adjusted to zero.

[0048] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and the above-mentioned improvements and modifications should be regarded as the protection scope of the present application.

Claims

1. A sponge indentation hardness tester, comprising a base (10), characterized in that: A test platform (20) is fixed on the base (10), and a pressure test component (30) is provided above the middle part of the test platform (20). The test platform (20) is equipped with multiple detachable sponge limiting blocks (40). The pressure testing assembly (30) includes a pressure block (301), which is fixed to the bottom of the pressure sensor (303) via a connecting part (302). The upper part of the pressure sensor (303) is fixed to the middle of the lifting block (304). The two ends of the lifting block (304) are respectively fixed to the sliders (306) of two vertically arranged linear modules (305). The lower end of the linear module (305) is fixed to the base (10), and the upper ends of the two linear modules (305) are fixed via a crossbeam (307).

2. The sponge indentation hardness tester according to claim 1, characterized in that: The test platform (20) has several rectangular arrays of small holes (201) formed on it. The sponge limiting block (40) is L-shaped, and at least two pins (401) are fixed on the bottom surface of the sponge limiting block (40). The pins (401) are inserted into the corresponding small holes (201).

3. The sponge indentation hardness tester according to claim 2, characterized in that: The height of the sponge limiting block (40) is no greater than one-fifth of the thickness of the sponge block being tested.

4. The sponge indentation hardness tester according to claim 1, characterized in that: The upper limit block (308) of the lifting block is fixed in the middle of the crossbeam (307).

5. The sponge indentation hardness tester according to claim 4, characterized in that: A displacement sensor (309) is fixed inside the upper limit block (308) of the lifting block, and the measuring end of the displacement sensor (309) extends out of the upper limit block (308).

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