A device for testing the properties of a rubber block

Abstract

The present application relates to a kind of rubber block performance testing device, including heating box, the top of the heating box is provided with mounting bracket, the inner wall top of the mounting bracket is provided with cylinder, the bottom of the cylinder is provided with moving frame, the bottom of the moving frame is through heating box and extends to heating box inside, the top between the inner wall of the moving frame and the top of heating box forms the test interval for rubber normal temperature state test, the present application is through the test interval for rubber normal temperature state test formed between the top of the inner wall of the moving frame and the top of heating box, and the bottom between the inner wall bottom of the moving frame and heating box forms the test interval for rubber high temperature state, two groups of test intervals, since its driving force is same cylinder, so that the rubber block of two groups under different temperature is the same in the process of testing stress, reduce the influence of other factors, try to ensure that, except temperature, the consistency of other test environment, reduce error.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber material testing, in particular to a rubber block performance testing device. BACKGROUND

[0002] Rubber refers to a high-elastic polymer material with reversible deformation, which is elastic at room temperature, can produce large deformation under the action of small external force, and can restore to original state after the external force is removed. Rubber is a completely amorphous polymer, which has a low glass transition temperature and a large molecular weight, usually more than several hundred thousand. Early rubber is obtained from the latex of rubber trees, rubber grass and other plants, and is processed into an elastic, insulating, water and air impermeable material.

[0003] The rubber performance testing method in industry is to observe whether the rubber can restore to original state after stretching or compression for a period of time and removing the stretching or compression force. However, in actual working conditions, the rubber material also needs to withstand high temperature in the working environment, which will further accelerate the aging of the material and reduce the service life of the material. Therefore, in order to facilitate the rubber performance testing, a rubber block performance testing device that can be compared under normal temperature and working temperature is designed. SUMMARY

[0004] The present application provides a rubber block performance testing device to overcome the shortcomings of the prior art, and the specific technical solutions are as follows:

[0005] A rubber block performance testing device, comprising a heating box, a mounting frame is arranged on the top of the heating box, a gas cylinder is arranged on the inner wall top of the mounting frame, a moving frame is arranged at the bottom of the gas cylinder, the moving frame penetrates through the heating box and extends into the inside of the heating box, a test interval for rubber normal temperature state testing is formed between the inner wall top of the moving frame and the top of the heating box, a test interval for rubber high temperature state testing is formed between the bottom of the moving frame and the inner wall bottom of the heating box, clamping units are arranged above and below the test interval, and the moving frame is driven by the gas cylinder to make lifting movement in the test interval, so as to control the rubber block to make stretching test or compression test.

[0006] As an improvement of the above technical solution, the clamping unit comprises an adjusting mechanism and two sets of limiting mechanisms arranged at the bottom of the adjusting mechanism, and the surfaces of the two sets of limiting mechanisms are detachably connected with mounting covers.

[0007] As an improvement of the above technical solution, the adjusting mechanism comprises a fixed disc and a bidirectional screw rod rotatably inserted into the inside of the fixed disc, the two ends of the bidirectional screw rod penetrate through the fixed disc and extend to the outside of the fixed disc, a threaded sleeve is threadedly connected to each end of the bidirectional screw rod and located in the inside of the fixed disc, and a limiting mechanism is arranged at the bottom of the threaded sleeve.

[0008] As the improvement of the above technical scheme, the limiting mechanism comprises a conversion assembly arranged below the threaded sleeve, a V-shaped plate arranged below the rotating assembly, and a fixed plate arranged on one side of the V-shaped plate.

[0009] As the improvement of the above technical scheme, the rotating assembly comprises a limiting column in an inverted T-shaped structure, a mounting groove arranged in the V-shaped plate, and a spring, the mounting groove is movably connected with the limiting column at the top, the limiting column is rotatably connected with the bottom of the threaded sleeve, and the spring is wound on a section of the surface of the limiting column inside the mounting groove.

[0010] As the improvement of the above technical scheme, the V-shaped plate is provided with sliding blocks on both sides of the top, and the fixed disc is provided with sliding grooves matched with the sliding blocks at the bottom.

[0011] As the improvement of the above technical scheme, the V-shaped plate and the fixed plate are integrally formed.

[0012] As the improvement of the above technical scheme, the side of the fixed plate away from the V-shaped plate is provided with a plurality of limiting plates, and the inner wall of the mounting cover is provided with limiting holes matched with the limiting plates.

[0013] As the improvement of the above technical scheme, the distance between the two groups of clamping units arranged in the test interval for the rubber at room temperature is equal to the distance between the two groups of clamping units arranged in the test interval for the rubber at high temperature.

[0014] The beneficial effects of the present application are as follows:

[0015] The test interval for the rubber at room temperature is formed between the top of the inner wall of the moving frame and the top of the heating box, and the test interval for the rubber at high temperature is formed between the bottom of the moving frame and the bottom of the inner wall of the heating box, so that the rubber blocks at two different temperatures are subjected to the same force during the test, the influence of other factors is reduced, the consistency of other test environments except temperature is ensured as much as possible, the error is reduced, and the switching between the stretching and compression states can be realized through the cylinder, so that the rubber block can be tested in the compression or stretching state. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the compression state structure of the present application.

[0017] Figure 2 It is a schematic diagram of the stretching state structure in the present application.

[0018] Figure 3 It is a bottom view of the clamping unit in the present application.

[0019] Figure 4 Structure diagram of the connection between the rotating assembly and the adjusting mechanism in the application;

[0020] Figure 5 Structure diagram of the connection between the rotating assembly and the adjusting mechanism in the application; Figure 4 Structure diagram of the connection between the rotating assembly and the adjusting mechanism in the application;

[0021] Figure 6 Structure diagram of the connection between the rotating assembly and the adjusting mechanism in the application.

[0022] The figure shows: 1, heating box; 2, moving frame; 3, air cylinder; 4, adjusting mechanism; 41, fixed disc; 42, bidirectional screw rod; 43, threaded sleeve; 5, mounting frame; 6, limiting mechanism; 61, V-shaped plate; 62, fixed plate; 63, limiting plate; 64, sliding block; 65, limiting column; 66, mounting groove; 67, spring; 7, mounting cover. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0024] A rubber block performance testing device, comprising a heating box 1, wherein the top of the heating box 1 is provided with a mounting frame 5, the inner wall top of the mounting frame 5 is provided with an air cylinder 3, the bottom of the air cylinder 3 is provided with a moving frame 2, the bottom of the moving frame 2 penetrates through the heating box 1 and extends to the inside of the heating box 1, the moving frame 2 inner wall top and the heating box 1 top form a testing interval for rubber normal temperature state testing, the moving frame 2 bottom and the heating box 1 inner wall bottom form a testing interval for rubber high temperature state testing, the testing interval upper part and lower part are both provided with a clamping unit, the air cylinder 3 drives the moving frame 2 to do lifting movement in the testing interval, so as to control the rubber block to do tensile testing or compression testing.

[0025] The test device can compare the test of the rubber block under high temperature state and normal temperature state, the test interval for the rubber normal temperature state test is formed between the top of the inner wall of the moving frame 2 and the top of the heating box 1, and the test interval for the rubber high temperature state test is formed between the bottom of the moving frame 2 and the bottom of the inner wall of the heating box 1, since the driving forces of the two groups are the same group of cylinders 3, the forces of the rubber blocks under two different temperatures during the test are the same, the influence of other factors is reduced, the consistency of other test environments except temperature is ensured as much as possible, the error is reduced, and the switching of the stretching or compression state can also be realized through the cylinders, the compression or stretching test of the rubber block is realized, and the rubber samples of different sizes can be adapted through the clamping unit, wherein the high temperature state is 60-150℃, the heating box 1 is provided with a cabinet door (which is prior art and is not shown in the figure), and the center lines of the clamping units in the vertical direction are the same.

[0026] In order to make the pressure on the rubber block above the test interval uniform when the rubber block is compressed, with reference to Figure 1 and Figure 6 , the clamping unit comprises an adjusting mechanism 4 and two sets of limiting mechanisms 6 arranged at the bottom of the adjusting mechanism 4, and the surfaces of the two sets of limiting mechanisms 6 are detachably connected with mounting covers 7, by mounting the mounting cover 7 on the surface of the limiting mechanism 6 above the test interval, as Figure 1 , the problem that the pressure of the limiting mechanism 6 above the test interval on the rubber block is not uniform, resulting in inaccurate test, can be effectively avoided during the compression test.

[0027] In order to be applicable to rubber blocks of different sizes, with reference to Figure 3 , the adjusting mechanism 4 comprises a fixed disc 41 and a bidirectional screw rod 42 rotatably connected to the inside of the fixed disc 41, both ends of the bidirectional screw rod 42 penetrate through the fixed disc 41 and extend to the outside of the fixed disc 41, and a threaded sleeve 43 is threadedly connected to both ends of the surface of the bidirectional screw rod 42 and located inside the fixed disc 41, a limiting mechanism 6 is arranged at the bottom of the threaded sleeve 43, by rotating the bidirectional screw rod 42, the limiting mechanism 6 is driven by the two sets of threaded sleeves 43 to move towards each other or away from each other, so as to clamp rubber blocks of different sizes.

[0028] In order to clamp rubber blocks of different shapes, with reference to Figure 3 and Figure 4The limiting mechanism 6 includes a conversion assembly arranged below the threaded sleeve 43, a V-shaped plate 61 arranged below the rotating assembly, and a fixed plate 62 arranged on one side of the V-shaped plate 61. Pulling the V-shaped plate 61 downward drives the rotating assembly to rotate, so that the V-shaped plate 61 and the fixed plate 62 interchange positions, thereby controlling the limiting of rubber blocks of different shapes. The V-shaped plate 61 can be used to clamp cylindrical rubber blocks, the fixed plate can be used to clamp strip-shaped rubber blocks, and the rotating assembly can convert the positions of the V-shaped plate 61 and the fixed plate 62.

[0029] In one embodiment, with reference to Figure 4 The rotating assembly includes a limiting column 65 in an inverted T-shaped structure, a mounting groove 66 arranged in the V-shaped plate 61, and a spring 67. The limiting column 65 is movably inserted into the top of the mounting groove 66, and the top of the limiting column 65 is rotationally connected to the bottom of the threaded sleeve 43. The surface of the limiting column 65 is wound with the spring 67 inside the mounting groove 66. Pulling the V-shaped plate 61 causes the V-shaped plate to press the spring 67 through the upper wall of the mounting groove 66, and then rotating the V-shaped plate 61 causes the V-shaped plate 61 to drive the limiting column 65 to rotate by 180°, thereby converting the positions of the V-shaped plate 61 and the fixed plate 62, and clamping rubber columns of different shapes. The "monosyllabic" structure in the limiting column 65 in the inverted T-shaped structure is in sliding connection with the mounting groove 66, and limiting grooves for allowing the limiting column 65 to move only up and down are arranged in the V-shaped plate 61 inside and on both sides of the mounting groove 66, so that the V-shaped plate 61 and the limiting column 65 do not relatively rotate.

[0030] In order to improve the stability of the V-shaped plate 61 or the fixed plate 62 in the use state, with reference to Figure 3 and Figure 4 The V-shaped plate 61 is provided with sliding blocks 64 on both sides of the top, and the fixed disc 41 is provided with sliding grooves matched with the sliding blocks 64. The sliding blocks 64 can improve the stability of the V-shaped plate 61 or the fixed plate 62 when moving, and the limiting of the sliding blocks 64 and the sliding grooves can avoid the rotation of the V-shaped plate during use. Only when the V-shaped plate 61 or the fixed plate 62 drives the sliding blocks 64 to move downward and disengage from the sliding grooves, the rotation of the limiting column 65 can be realized.

[0031] In order to improve the firmness of the connection between the V-shaped plate 61 and the fixed plate 62, with reference to Figure 3 The V-shaped plate 61 and the fixed plate 62 are integrally formed.

[0032] In order to improve the friction between the limiting plate 63 and the rubber block and facilitate the limiting installation of the installation cover 7, with reference to Figure 3 and Figure 6The fixing plate 62 is provided with a plurality of limiting plates 63 away from one side of the V-shaped plate 61, the inner wall of the mounting cover 7 is provided with limiting holes matched with the limiting plates 63, the bidirectional screw rod 42 is rotated to drive the V-shaped plate 61 and the fixing plate 62 to move away from each other through the threaded sleeve 43, the limiting plates 63 of the fixing plate 62 are inserted into the limiting holes of the inner wall of the mounting cover 7, so that the mounting cover 7 can be quickly mounted or dismounted.

[0033] In order to avoid the stress difference caused by the distance difference, referring to Figure 1 and Figure 2 The distance between the two groups of clamping units arranged in the test interval of the rubber normal temperature state test is equal to the distance between the two groups of clamping units arranged in the test interval of the rubber high temperature state test.

[0034] The above only describes the preferred embodiment of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rubber block performance testing device, characterized in that: The device includes a heating chamber (1), a mounting frame (5) on the top of the heating chamber (1), a cylinder (3) on the top of the inner wall of the mounting frame (5), a movable frame (2) on the bottom of the cylinder (3), the bottom of the movable frame (2) penetrating the heating chamber (1) and extending into the interior of the heating chamber (1), a test area for testing rubber at room temperature is formed between the top of the inner wall of the movable frame (2) and the top of the heating chamber (1), and a test area for testing rubber at high temperature is formed between the bottom of the movable frame (2) and the bottom of the inner wall of the heating chamber (1). In the test interval, clamping units are provided at the top and bottom. The cylinder (3) drives the moving frame (2) to move up and down within the test interval to control the rubber block to perform tensile or compression tests. The clamping unit includes an adjustment mechanism (4) and two sets of limiting mechanisms (6) located at the bottom of the adjustment mechanism (4). The surfaces of the two sets of limiting mechanisms (6) are detachably connected to mounting covers (7). The adjustment mechanism (4) includes a fixed plate (41) and a bidirectional lead screw (42) rotatably inserted into the fixed plate (41). Both ends of the lead screw (42) pass through the fixed plate (41) and extend to the outside of the fixed plate (41). Both ends of the bidirectional lead screw (42) and located inside the fixed plate (41) are threaded with threaded sleeves (43). The bottom of the threaded sleeves (43) is provided with a limiting mechanism (6). The limiting mechanism (6) includes a conversion component located below the threaded sleeves (43), a V-shaped plate (61) located below the rotating component, and a fixed plate (62) located on one side of the V-shaped plate (61). Pulling the V-shaped plate (61) downward drives the screw downward. The rotating assembly rotates, causing the V-shaped plate (61) and the fixed plate (62) to interchange positions, thereby controlling the limiting of rubber blocks of different shapes; the rotating assembly includes a limiting post (65) with an inverted T-shaped structure, an installation groove (66) opened inside the V-shaped plate (61) and a spring (67), the limiting post (65) is movably inserted into the top of the installation groove (66), the top of the limiting post (65) is rotatably connected to the bottom of the threaded sleeve (43), and a section of the limiting post (65) located inside the installation groove (66) is wound with a spring (67).

2. The rubber block performance testing device according to claim 1, characterized in that: The top two sides of the V-shaped plate (61) are provided with sliding blocks (64), and the bottom of the fixed plate (41) is provided with a sliding groove that matches the sliding blocks.

3. The rubber block performance testing device according to claim 2, characterized in that: The V-shaped plate (61) and the fixing plate (62) are integrally formed structures.

4. The rubber block performance testing device according to claim 1, characterized in that: The fixing plate (62) is provided with several limiting plates (63) on the side away from the V-shaped plate (61), and the inner wall of the mounting cover (7) is provided with limiting holes that are compatible with the limiting plates (63).

5. The rubber block performance testing device according to claim 1, characterized in that: The spacing between the two sets of clamping units set in the test range of the rubber room temperature test is equal to the spacing between the two sets of clamping units set in the test range of the rubber high temperature test.

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