Bearing test device for compression rebound rate test

Abstract

The utility model provides a bearing test device for a compression rebound rate test, which comprises a box body, partition plates are arranged in the box body, the box body is divided into a plurality of test cavities, a plurality of samples can be tested at the same time, the side wall of the box body located in the test cavities is detachably connected with a first pressing plate, and the first pressing plate is detachably connected with a second pressing plate. A second pressing plate parallel to the first pressing plate is further arranged in the testing cavity, the second pressing plate is in sliding connection with the box body, and the second pressing plate is provided with a stop mechanism; a sliding rod is arranged on the outer side of the box wall of the box body and is in sliding connection with an auxiliary measuring device; the scale is arranged on the top face of the partition plate, the sample compression amount is measured through cooperation of the scale and the auxiliary measuring device, the compression percentage of the sample is calculated, and the testing operation is more accurate. The device is simple in structure and convenient to operate, and the test working efficiency is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of compression rebound rate testing, and in particular to a load-bearing testing device for compression rebound rate testing. Background Art

[0002] Soft foam polymer material is an excellent thermal insulation material. It is easy to restore its original shape after stress is removed, with almost no residual deformation. Its good elasticity makes it suitable for use as a cushion and buffering packaging material. Compression rebound rate is one of the important parameters for testing the resilience of soft foam polymer material samples.

[0003] GB / T 6669-2008 standard stipulates that when conducting a rebound rate test, the length and width of the sample should be (50±1) mm respectively, the thickness should be (25±1) mm, the sample should be free of contamination, and there should be no skin on all sides. During the test, the compression distance can be adjusted to the required deformation, and five samples are required. Traditional testing devices test single samples one by one, which is inefficient; there will be differences in the thickness of different samples, and the relative error is large when compressed according to the percentage of the same sample thickness. Utility Model Content

[0004] The embodiment of the present application provides a load-bearing test device for compression rebound rate testing, which is used to solve the problem that traditional test devices test samples one by one, have low efficiency, and have large relative errors when compressed at the same thickness percentage.

[0005] An embodiment of the present application provides a load-bearing test device for compression rebound rate testing, including a box body, at least one partition is arranged in the box body, the partition divides the box body into a plurality of test chambers, the side wall of the box body located in the test chamber is detachably connected to a first pressure plate, and a second pressure plate parallel to the first pressure plate is also arranged in the test chamber, the second pressure plate is slidably connected to the box body, and the second pressure plate is provided with a stopping mechanism; a sliding rod is arranged on the outer side of the box wall of the box body, and an auxiliary measuring device is slidably connected to the sliding rod; a ruler is arranged on the top surface of the partition.

[0006] In a feasible implementation, the stopping mechanism includes a bearing cover plate arranged on the second pressure plate, the bearing cover plate is connected to a screw, a threaded hole is opened on the side wall of the box body near the second pressure plate, the screw passes through the threaded hole and is threadedly connected with the threaded hole.

[0007] In a feasible implementation, a lever is further included; a through hole is formed at the end of the screw rod located outside the box body, and the lever passes through the through hole to assist the screw rod in rotating.

[0008] In a feasible implementation, the side wall of the box body in the test cavity is provided with a slot, and the first pressing plate is clipped into the slot.

[0009] In a feasible implementation, the bottom of the partition is bent to form a slide rail, and the second pressing plate is slidably connected to the slide rail.

[0010] In a feasible implementation, two mounting blocks are symmetrically arranged on the outer side of the side wall of the box body, a countersunk hole for the slide rod to be inserted is opened in the middle of the mounting block, and a spring piece is installed in the countersunk hole of any one of the mounting blocks.

[0011] In a feasible implementation, the auxiliary measuring device includes a shell, the middle of the shell includes a mounting hole, and a clockwork spring is arranged in the shell.

[0012] In a feasible implementation, a blocking piece is further included, and the blocking piece is a T-shaped structure, and the blocking piece is slidably matched with the slide rail.

[0013] In a feasible implementation, the bottom of the side wall of the box is bent to form a slot, and the bottom surface of the box is plug-connected to the slot.

[0014] The load-bearing test device for compression rebound rate test provided by the present application has a partition provided in the box body, which divides the box body into multiple test chambers, so that multiple samples can be tested at the same time. The first pressing plate located in the test chamber is detachably connected to the side wall of the box body, and can be easily replaced when there are problems such as wear on the first pressing plate. A ruler is provided on the top of the partition, and an auxiliary measuring device is provided. The two cooperate to measure the compression amount of the sample, and the compression percentage of the test sample is calculated, making the test operation more accurate. The device has a simple structure and is easy to operate, which effectively improves the efficiency of the test work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of a load-bearing test device for compression rebound rate testing provided by the present application;

[0017] Figure 2 It is a schematic diagram of the bottom structure of a load-bearing test device for compression rebound rate testing provided by the present application;

[0018] Figure 3 It is a schematic diagram of the structure of the auxiliary measuring device;

[0019] Figure 4 It is a schematic diagram of the coordination between the baffle and the partition.

[0020] Description of reference numerals:

[0021] Among them, 1-box; 11-partition; 111-slide rail; 12-first pressure plate; 13-second pressure plate; 14-slide rod; 15-ruler; 16-threaded hole; 17-card slot; 18-slot; 2-auxiliary measuring device; 21-housing; 211-mounting hole; 212-law spring; 3-bearing cover plate; 31-screw; 311-through hole; 4-mounting block; 5-motor; 6-blocking piece. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0023] During the load test of the compression rebound rate test, the compression distance can be adjusted to the required deformation, and 5 samples are required. The traditional testing device tests single samples one by one, which is inefficient; there will be differences in the thickness of different samples, and the relative error is large when compressed according to the percentage of the same thickness. The device provided in this application can meet the needs of testing multiple samples at the same time, and can accurately calculate the compression percentage of the tested samples, making the test operation more accurate. The device has a simple structure and is easy to operate, which effectively improves the efficiency of the test work.

[0024] The specific structure of the load-bearing test device for the compression rebound rate test provided by the present application is described in detail below in conjunction with the accompanying drawings.

[0025] Reference Figure 1As shown, the embodiment of the present application provides a load-bearing test device for compression rebound rate test, including a box body 1, at least one partition 11 is arranged in the box body 1, and the partition 11 divides the box body 1 into multiple test chambers. When a partition 11 is arranged in the box body 1, the box body 1 is divided into two test chambers, which can meet the requirements of two samples being tested at the same time. When the number of partitions 11 is n, the box body 1 is divided into n+1 test chambers, which can meet the requirements of n+1 samples being tested at the same time. According to the provisions of GB / T6669-2008 standard, for the compression rebound rate test of soft foam polymer materials, five samples need to be tested. Therefore, in this embodiment, the number of partitions 11 is set to four, that is, there are five test chambers in the box body 1, which can meet the requirements of five samples being tested at the same time. Compared with the traditional test device that tests single samples one by one, the efficiency is effectively improved. For other materials that need to be tested for compression rebound rate, the number of partitions 11 can be adjusted according to relevant standards to meet the test requirements.

[0026] In each test cavity, the side wall of the box body 1 is detachably connected with the first pressing plate 12. Specifically, the detachable connection method can be a method of fixing with bolts and matching nuts, or a magnetic method, that is, a magnet is set at the position where the side wall of the box body 1 is connected with the first pressing plate 12, and an iron material is set on the surface opposite to the first pressing plate 12 and the side wall of the box body 1, and the two are fixed by magnetic attraction. In this embodiment, a card slot 17 is set on the side wall of the box body 1, and the first pressing plate 12 is connected by being clamped in the card slot 17. This connection method is simpler and more convenient to operate, and saves processing costs.

[0027] The test chamber is also provided with a second pressing plate 13 parallel to the first pressing plate 12. During the test, the sample is placed between the first pressing plate 12 and the second pressing plate 13, and the second pressing plate 13 is pushed to compress the sample to the required percentage. The second pressing plate 13 is slidably connected to the box body 1, specifically, slides along the slide rail 111 provided below the partition 11. The partition 11 and the slide rail 111 limit the second pressing plate 13, so that its sliding has a clear direction. During the sample compression process, the sample is prevented from moving due to the shaking of the second pressing plate 13. After being compressed to the specified percentage position, the position is locked by the stop mechanism provided by the second pressing plate 13, so that the sample remains in a compressed state within the specified time of the test. As an example, for soft foam polymer materials, five samples need to be tested. During the test, the compression percentage is usually set to 50%±4% or 70%±4% of the sample thickness. In special cases, it can be compressed to 90%, and the compressed state usually needs to be maintained for (22±0.2)h.

[0028] In the traditional test method, the percentage compression of the same sample thickness is large because the thickness of different samples will be different. If each sample is measured separately, the operation is cumbersome and inefficient. In view of this problem, in the present application, a slide bar 14 is provided on the outer side of the box wall of the box body 1, and an auxiliary measuring device 2 is slidably connected to the slide bar 14, and a scale 15 is provided on the top surface of the partition 11. When in use, the spring spring 212 in the auxiliary measuring device 2 is pulled out so that it is aligned with the edge of the sample. The length of the spring spring 212 is sufficient to span the box body 1. At this time, when the spring spring 212 passes through the partition 11, it covers the scale 15 on the top of the partition 11, and the scale reading at this time is read. When the sample is compressed, the auxiliary measuring device 2 is moved along the slide bar 14, and the above operation on the spring spring 212 is repeated. The degree of the corresponding scale after compression is read, and the compression percentage is calculated by the two. The above measurement operation is simpler and more convenient than the traditional measurement operation, and the movement of the auxiliary measuring device 2 can be synchronized with the compression operation of the sample, and the test efficiency is high.

[0029] Reference Figure 1 As shown, in some embodiments, the stop mechanism includes a bearing cover plate 3 disposed on the second pressure plate 13, the bearing cover plate 3 is connected to a screw 31, a threaded hole 16 is provided on the side wall of the housing 1 near the second pressure plate 13, and the screw 31 passes through the threaded hole 16 and is threadedly connected with the threaded hole 16. The arrangement of the bearing cover plate 3 enables the second pressure plate 13 to be smoothly advanced during the rotation of the screw 31, effectively preventing it from shaking. The cooperation between the screw 31 and the threaded hole 16 is simple in structure but has a good use effect. On the one hand, the rotation of the screw 31 can provide thrust for the sliding of the second pressure plate 13, and on the other hand, stopping the rotation of the screw 31 can conveniently lock the position of the second pressure plate 13.

[0030] Reference Figure 1 As shown, in some embodiments, a lever 32 is further included, and a through hole 311 is formed at the end of the screw rod 31 located outside the box body 1, and the lever 32 passes through the through hole 311 to assist the screw rod 31 in rotating. Exemplarily, in this embodiment, the diameter of the through hole 311 is set to (8±1) mm.

[0031] Reference Figure 1 As shown, a slot 17 is provided on the side wall of the box body 1 in the test cavity, and the first pressing plate 12 is clamped in the slot 17. It should be noted that for soft foam polymer materials, when the first pressing plate 12 is clamped in the slot 17, it is necessary to ensure that the length and width of the first pressing plate 12 not covered by the slot 17 are compatible with the length and width of the sample. As an example, in this embodiment, the size of the first pressing plate 12 not covered by the slot 17 can be set to (55×55) mm.

[0032] Reference Figure 2As shown, in some embodiments, the bottom of the partition 11 is bent to form a slide rail 111 , and the second pressing plate 13 is slidably connected to the slide rail 111 .

[0033] In some embodiments, two mounting blocks 4 are symmetrically arranged on the outer side of the side wall of the box body 1, and a countersunk hole for the slide bar 14 to be inserted is opened in the middle of the mounting block 4, and a spring piece is installed in the countersunk hole of any mounting block 4. During installation, one end of the slide bar 14 is inserted into the countersunk hole with the spring piece, the spring piece is compressed, and then the other end of the slide bar 14 is inserted into the countersunk hole of another mounting block 4 without the spring piece, and the slide bar 14 is loosened. Under the action of the spring piece, the slide bar 14 is fixed, and the installation is completed.

[0034] In some embodiments, reference Figure 3 As shown, the auxiliary measuring device 2 includes a housing 21, a mounting hole 211 is included in the middle of the housing 21, and a spring 212 is disposed in the housing 21. The spring 212 has a good reset function and automatically contracts after use, which is convenient and quick.

[0035] Reference Figure 2 As shown, in some embodiments, the bottom of the side wall of the box body 1 is bent to form a slot 18, and the bottom surface of the box body 1 is plugged and connected to the slot 18. The detachable design of the bottom surface of the box body 1 makes it easier to clean the sample debris. In addition, after being placed in the drying box, the bottom surface of the box body 1 is removed to make the temperature and humidity conduction easier.

[0036] Reference Figure 4 As shown, in some embodiments, a baffle 6 is also included, and the baffle 6 is a T-shaped structure, and the baffle 6 is slidably matched with the slide rail 111. When testing thin materials, according to the provisions of GB / T 6669-2008 standard, a sufficient number of (50×50) mm samples need to be overlapped so that the total thickness of the overlapped samples before compression is at least 25 mm, and each sample is separated by a glass sheet. During the test, the entire overlapped piece is used as a sample. Before compression, when the overlapped piece is placed in the test cavity, the baffle 6 is located at the bottom of the glass sheet to prevent the glass sheet from sliding off. When multiple samples are overlapped, a baffle 6 can be placed at the bottom of each glass sheet. The baffle 6 is a T-shaped structure, and its two sides are overlapped on the slide rail 111. When the overlapped sample is compressed, the baffle 6 slides along the slide rail 111 as the sample is compressed.

[0037] According to the above technical features, the load-bearing test device for compression rebound rate test provided by the present application is applied in practical application scenarios as follows:

[0038] When in use, the test sample is made according to the provisions of GB / T 6669-2008 standard. After the production is completed, the sample is placed in the test cavity of the device, and the thickness of the sample is measured by using the auxiliary measuring device 2 and the ruler 15. The compression percentage of the sample is determined according to the standard provisions, and the scale 15 corresponding to the specified percentage is calculated. The screw 31 in each test cavity is rotated respectively, and the second pressing plate 13 is pushed to move to the calculated scale 15 by the screw 31 to complete the compression of the sample. The bottom surface of the box body 1 is pulled out from the slot 18, and the sample and the device are placed in the oven together for (22±0.2)h. The device has a simple structure and is easy to operate, which effectively improves the test work efficiency.

[0039] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0040] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A load-bearing test device for compression rebound rate testing, characterized in that: The invention comprises a box body (1), wherein at least one partition (11) is arranged inside the box body (1), wherein the partition (11) divides the box body (1) into a plurality of test chambers, wherein the side wall of the box body (1) located in the test chamber is detachably connected to a first pressing plate (12), wherein a second pressing plate (13) parallel to the first pressing plate (12) is also arranged in the test chamber, wherein the second pressing plate (13) is slidably connected to the box body (1), and wherein the second pressing plate (13) is provided with a stop mechanism; a sliding rod (14) is arranged on the outer side of the box wall of the box body (1), wherein an auxiliary measuring device (2) is slidably connected to the sliding rod (14); and a scale (15) is arranged on the top surface of the partition (11).

2. The load-bearing test device for compression rebound rate test according to claim 1, characterized in that: The stopping mechanism comprises a bearing cover plate (3) arranged on the second pressure plate (13), the bearing cover plate (3) being connected with a screw rod (31), a threaded hole (16) being provided on the side wall of the box body (1) close to the second pressure plate (13), the screw rod (31) passing through the threaded hole (16) and being threadedly connected with the threaded hole (16).

3. The load-bearing test device for compression rebound rate test according to claim 2, characterized in that: It also includes a lever (32); a through hole (311) is provided at the end of the screw rod (31) located outside the box body (1); the lever (32) passes through the through hole (311) to assist the screw rod (31) in rotating.

4. The load-bearing test device for compression rebound rate test according to claim 1, characterized in that: A slot (17) is provided on the side wall of the box body (1) in the test cavity, and the first pressing plate (12) is snap-fitted into the slot (17).

5. The load-bearing test device for compression rebound rate test according to claim 1, characterized in that: The bottom of the partition (11) is bent to form a slide rail (111), and the second pressing plate (13) is slidably connected to the slide rail (111).

6. The load-bearing test device for compression rebound rate test according to claim 1, characterized in that: Two mounting blocks (4) are symmetrically arranged on the outer side of the side wall of the box body (1), and a countersunk hole for inserting the sliding rod (14) is opened in the middle of the mounting block (4), and a spring piece is installed in the countersunk hole of any one of the mounting blocks (4).

7. The load-bearing test device for compression rebound rate test according to claim 1, characterized in that: The auxiliary measuring device (2) comprises a housing (21), the middle of the housing (21) comprises a mounting hole (211), and a spring (212) is arranged inside the housing (21).

8. The load-bearing test device for compression rebound rate test according to claim 5, characterized in that: It also includes a blocking piece (6), which is a T-shaped structure, and the blocking piece (6) is slidably matched with the slide rail (111).

9. The load-bearing test device for compression rebound rate test according to claim 1, characterized in that: The bottom of the side wall of the box body (1) is bent to form a slot (18), and the bottom surface of the box body (1) is plug-connected to the slot (18).

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