Self-leveling protective clamp for glass bending test of universal testing machine

Abstract

The utility model discloses a self-leveling protective clamp for a glass bending test of a universal testing machine, and belongs to the technical field of universal testing machines. Comprising a base plate, two supporting plates which are perpendicular to the base plate and are symmetrically distributed, a protective cover and a leveling mechanism. The protective cover sleeves the peripheries of the two support plates and is fixedly connected with the base plate; the leveling mechanism comprises an inner sleeve which is connected to the upper portion of the inner wall of the protective cover in a sleeving mode and can longitudinally slide along the inner wall, four elastic connecting pieces which are fixedly connected with the front inner wall, the rear inner wall, the left inner wall and the right inner wall of the inner sleeve respectively, pressing plates connected to the tail ends of the elastic connecting pieces and telescopic supporting plates. One end of the telescopic supporting plate is fixedly connected to the inner wall of the inner sleeve, and the other end is fixedly connected with the bottom surface of the pressing plate; wherein the elastic force of the elastic connecting pieces on the front and rear surfaces and the left and right surfaces is the same; the pressing plate and the protective cover are both higher than the supporting plate. According to the utility model, the position of a test piece can be quickly and accurately leveled during a glass bending test, and fragments are prevented from splashing in the test process.

Description

Technical Field

[0001] This utility model relates to the field of universal testing machines, and in particular to a fixture used in glass bending tests of universal testing machines. Background Technology

[0002] The universal testing machine is a product of the combination of modern electronic and mechanical transmission technologies. It is a large-scale precision testing instrument that fully utilizes the strengths of both electromechanical systems. It can perform various performance tests on a wide range of materials, including tensile, compression, bending, peeling, and shearing tests. It features a wide measurement range, high accuracy, and fast response. It is reliable, efficient, and can display, record, and print test data in real time.

[0003] In bending tests, a load is typically applied to one side of the specimen. During the test, the initial failure load, initial damage state, final failure load, and crack morphology at final failure are recorded simultaneously. The placement of the specimen before the test significantly affects the accuracy of the results. In existing technologies, specimens in bending tests are mostly attached to the two supports of a clamp. It is well known that when the specimen length is uncertain (non-standard specimens), the stress will differ when the suspension length outside the supports is inconsistent, even if the length difference is small, directly affecting the test results. Furthermore, the specimen must be placed perpendicular to the supports to ensure consistent stress on both sides. In existing technologies, these issues are mostly addressed through manual adjustment, which introduces errors and excessive time consumption. Especially in bending tests of glass materials, due to the increased contact area and the characteristics of glass specimens, achieving accurate manual adjustment is more difficult, leading to even greater errors in the test results.

[0004] Furthermore, during glass bending tests, it is impossible to fully control the changes in the shape of the glass under test conditions, which may result in glass breakage, shards, and other phenomena, posing safety hazards. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention aims to provide a clamp that can quickly and accurately self-level the glass test state during glass bending tests, and also has a protective effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The universal testing machine glass bending test self-leveling protective fixture includes a base plate, two parallel support plates symmetrically distributed around the geometric center of the base plate, and the support plates are vertically mounted on the surface of the base plate; it also includes a protective cover and a leveling mechanism symmetrically arranged around the geometric center of the base plate; the protective cover is a rectangular enclosure structure, fitted around the outer perimeter of the two support plates, and fixedly connected to the base plate; the leveling mechanism includes an inner sleeve fitted onto the upper part of the inner wall of the protective cover and capable of sliding longitudinally along the inner wall, four elastic connectors fixedly connected to the front, rear, left, and right inner walls of the inner sleeve respectively, a pressure plate connected to the end of each elastic connector, and a telescopic support plate; one end of the telescopic support plate is fixedly connected to the inner wall of the inner sleeve, and the other end is fixedly connected to the bottom surface of the pressure plate; under the action of overcoming the elastic force, the pressure plate drives the telescopic support plate to perform reciprocating linear motion; the elastic forces of the front, rear, left, and right elastic connectors are the same; the height of the pressure plate and the protective cover is greater than the height of the support plates.

[0008] Preferably, the inner wall of the protective cover is provided with a limiting ring to prevent the inner sleeve from sliding down.

[0009] Preferably, the top surface of the leveling mechanism is flush with the top surface of the protective cover after it is fitted onto the inner wall of the protective cover.

[0010] Preferably, the inner sleeve is provided with hooks that flip outward and press against the top surface of the protective cover.

[0011] Preferably, the corners of the protective cover and inner sleeve are rounded.

[0012] When using it, simply place the glass specimen directly between the four-way pressure plates. Since the elastic force of the elastic connectors on the front and back (Y direction) and left and right (X direction) is the same, the glass specimen will automatically level itself in both directions under the action of the elastic force. After the glass specimen is leveled and stable, press down on the glass specimen and take out the inner sleeve upwards. After the test is completed, put the inner sleeve back.

[0013] Compared with existing technologies, this invention uses an added protective cover to enclose the glass specimen during testing, reducing the risk of glass splattering out of the clamps and greatly improving the safety of the test. The four-way (front, back, left, and right) elastic leveling mechanism allows for rapid and accurate positioning of the geometric center of the glass specimen, making operation convenient. Attached Figure Description

[0014] Figure 1 Overall 3D structure diagram;

[0015] Figure 2 Protective cover structure diagram;

[0016] Figure 3 This is a structural diagram of the leveling mechanism.

[0017] In the diagram: 1. Base plate; 2. Support plate; 3. Protective cover; 4. Inner sleeve; 5. Elastic connector; 6. Pressure plate; 7. Telescopic support plate; 8. Limiting ring; 9. Hanging lug. Detailed Implementation

[0018] The structure and working process of this utility model will now be fully described in conjunction with specific embodiments, so that those skilled in the art can fully understand and implement it.

[0019] like Figure 1 , Figure 2 , Figure 3 As shown, the self-leveling protective fixture for glass bending tests on a universal testing machine includes a base plate 1 and two parallel support plates 2 symmetrically distributed around the geometric center of the base plate 1. The support plates 2 are vertically mounted on the surface of the base plate 1 and are used to place the glass specimen during the test. It also includes a protective cover 3 symmetrically arranged around the geometric center of the base plate 1 and a leveling mechanism. The protective cover 3 is a rectangular enclosure structure that fits around the two support plates 2 and is fixedly connected to the base plate 1. The leveling mechanism includes an inner sleeve 4 that fits onto the upper part of the inner wall of the protective cover 3 and can slide longitudinally along the inner wall. The system includes a limiting ring 8 to prevent the inner sleeve 4 from sliding down, four elastic connectors 5 fixedly connected to the front, rear, left, and right inner walls of the inner sleeve 4 respectively, a pressure plate 6 connected to the end of each elastic connector 5, and a telescopic support plate 7. One end of the telescopic support plate 7 is fixedly connected to the inner wall of the inner sleeve 4, and the other end is fixedly connected to the bottom surface of the pressure plate 6. Under the action of overcoming the elastic force, the pressure plate 6 drives the telescopic support plate 7 to perform reciprocating linear motion. The elastic forces of the elastic connectors 5 on the front, rear, left, and right sides are the same. The height of the pressure plate 6 and the protective cover 3 is greater than the height of the support plate 2.

[0020] Preferably, the top surface of the leveling mechanism is flush with the top surface of the protective cover 3 after it is fitted onto the inner wall of the protective cover 3.

[0021] Preferably, the inner sleeve 4 is provided with a hook 9 that flips outward and presses against the top surface of the protective cover 3.

[0022] Preferably, the corners of the protective cover 3 and the inner sleeve 4 are rounded.

[0023] In this embodiment, the glass specimen to be tested is placed between four pressure plates 6 to overcome the elastic force. The test specimen is leveled by the elastic pressure in four directions (the elastic forces in opposite directions are equal). After leveling, the glass specimen is gently pressed by hand, and the inner sleeve 4 is removed before the test can be carried out.

[0024] The entire leveling process is quick and simple, taking only a few seconds to complete, which greatly improves the accuracy of the test results. The protective cover 3 can effectively prevent the possible flying of broken glass fragments when the glass specimen is pressed down, thus improving the safety of the test process.

[0025] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the technical principles and scope of this utility model. Therefore, any combination, modification, or substitution made to the disclosed technical features of this utility model based on its technical essence, without departing from the principles or solution of this utility model, should fall within the protection scope of this utility model.

Claims

1. A universal testing machine glass bending test self-leveling protection fixture, comprising a base plate (1), two support plates (2) symmetrically distributed with the geometric center of the base plate (1) and arranged in parallel, the support plates (2) are vertically arranged on the surface of the base plate (1); characterized in that, It also includes the guard shield (3) and leveling mechanism which are symmetrically arranged at the geometric center of the substrate (1); the guard shield (3) is a rectangular fence structure, which is sleeved on the outer periphery of the two supporting plates (2) and is fixedly connected with the substrate (1); the leveling mechanism comprises an inner sleeve (4) which is sleeved on the upper part of the inner wall of the guard shield (3) and can slide longitudinally along the inner wall, four elastic connecting members (5) which are respectively fixedly connected with the front, rear, left and right inner walls of the inner sleeve (4), a pressing plate (6) which is connected at the end of each elastic connecting member (5), and a telescopic supporting plate (7); one end of the telescopic supporting plate (7) is fixedly connected with the inner wall of the inner sleeve (4), and the other end is fixedly connected with the bottom surface of the pressing plate (6); under the action of overcoming the elastic force, the pressing plate (6) drives the telescopic supporting plate (7) to do reciprocating linear motion; the elastic forces of the front, rear, left and right elastic connecting members (5) are respectively the same; the heights of the pressing plate (6) and the guard shield (3) are both greater than the height of the supporting plate (2).

2. The universal testing machine glass bend test self-leveling guard fixture of claim 1, wherein, A limiting ring (8) is arranged on the inner wall of the guard shield (3) to prevent the inner sleeve (4) from sliding downward.

3. The universal testing machine glass bend test self-leveling guard fixture of claim 1, wherein, The leveling mechanism is flush with the top surface of the guard shield (3) after being sleeved on the inner wall of the guard shield (3).

4. The universal testing machine glass bend test self-leveling guard fixture of claim 3, wherein, The inner sleeve (4) is provided with a hanging ear (9) which is turned outward and covers the top surface of the guard shield (3).

5. The universal testing machine glass bend test self-leveling guard fixture of any of claims 1-4, wherein, The corners of the guard shield (3) and the inner sleeve (4) are in arc shape.

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