Sample centering device

Abstract

The utility model relates to a sample centering device which comprises the following components: a fixing mechanism which is symmetrically arranged relative to a sample and comprises a body and an end part, the body is clamped at two sides of the sample, the end part is arranged at the tail end of the body, and the outer side of the end part is provided with a first locking structure which is used for centering the sample; the L-shaped centering mechanism is symmetrically arranged relative to the test sample and is provided with a first transverse side edge and a first vertical side edge, the first vertical side edge and the first transverse side edge are connected to form an L shape, the first transverse side edge abuts against the test sample, the first vertical side edge is provided with a second locking structure used for centering the test sample, and the first vertical side edge is provided with a second locking structure used for centering the test sample. And the second locking structure is matched with the first locking structure. According to the utility model, the centering of the clamp can be easily realized, and the centering requirements in the width direction during the test of samples with different specifications are met.

Description

Technical Field

[0001] The utility model relates to the field of testing devices, in particular to a sample centering device. Background Art

[0002] For tests such as material bending, interlaminar shear, and impact of composite materials, most specimens are in a three-point bending or four-point bending stress state. Special attention should be paid to the lower support points of the specimens being on the same horizontal line. Therefore, for specimens of different widths, alignment in the width direction is extremely important. Summary of the invention

[0003] The utility model aims to provide a sample centering device to realize the quick replacement of samples with different widths and improve the test accuracy and efficiency.

[0004] In order to achieve the purpose of solving the above-mentioned problems, the technical solution adopted by the utility model is to provide a sample centering device, including: a fixing mechanism, symmetrically arranged relative to the sample, including a main body and an end, the main body is clamped on both sides of the sample, the end is arranged at the end of the main body, and the outer side of the end is provided with a first locking structure for centering the sample; and an L-shaped centering mechanism, symmetrically arranged relative to the sample, having a first lateral side and a first vertical side, the first vertical side is connected to the first lateral side and forms an L shape, the first lateral side abuts the sample, and the first vertical side is provided with a second locking structure for centering the sample, and the second locking structure cooperates with the first locking structure.

[0005] Furthermore, the width of the first vertical side is greater than the width of the first lateral side.

[0006] Furthermore, the second locking structure includes a slide groove, and a screw is arranged in the slide groove.

[0007] Furthermore, the first locking structure includes a threaded hole that cooperates with the screw.

[0008] Furthermore, the first locking structure also includes an inverted L-shaped centering structure fixedly connected to the outer side of the end, the inverted L-shaped centering structure has a second lateral side and a second vertical side, the second vertical side is fixedly connected to the outer side of the end, and the threaded hole is provided on the second vertical side.

[0009] Furthermore, the first transverse side, the second transverse side, the first vertical side and the second vertical side are all in the shape of a rectangular parallelepiped; and the sliding groove is a strip groove.

[0010] Further, when the second locking structure cooperates with the first locking structure to be locked, the first vertical side edge coincides with the second vertical side edge, and an extension direction of the first lateral side edge is opposite to an extension direction of the second lateral side edge.

[0011] Furthermore, a size scale is provided on the first vertical side or the second vertical side.

[0012] Furthermore, the L-shaped centering mechanisms are provided in plurality and are symmetrically distributed on both sides of the sample.

[0013] Furthermore, a plurality of the L-shaped centering mechanisms are distributed on the periphery of the fixed structure.

[0014] The utility model can easily realize the centering of the fixture and meet the centering requirements in the width direction when testing samples of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a sample centering device in an alignment state according to a preferred embodiment of the utility model;

[0016] Figure 2 A schematic diagram of a sample centering device in a misaligned state according to a preferred embodiment of the utility model;

[0017] Figure 3 for Figure 1 A structural schematic diagram of the L-type centering mechanism;

[0018] Figure 4 for Figure 1 Another structural schematic diagram of the L-type centering mechanism in FIG. DETAILED DESCRIPTION

[0019] In order to make the present invention more clearly understood, a preferred embodiment is described in detail with reference to the accompanying drawings as follows:

[0020] See also Figure 1-4 , Figure 1 This is a schematic diagram of a sample centering device in an alignment state according to a preferred embodiment of the utility model. Figure 2 It is a schematic diagram of the misaligned state. Figure 3 and Figure 4An L-shaped centering mechanism is shown. As shown in the figure, the sample centering device includes a fixing mechanism 1 and an L-shaped centering mechanism 2. The fixing mechanism 1 is symmetrically arranged relative to the sample 3, and includes a main body 11 and an end 12. The main body 11 is clamped on both sides of the sample 3, and the end 12 is arranged at the end of the main body 11. A first locking structure 4 for centering the sample 3 is provided on the outer side of the end 12. The L-shaped centering mechanism 2 is symmetrically arranged relative to the sample 3, and has a first lateral side 21 and a first vertical side 22. The first vertical side 22 is connected to the first lateral side 21 and forms an L shape. The first lateral side 21 abuts the sample, and the first vertical side 22 is provided with a second locking structure 23 for centering the sample. The second locking structure 23 cooperates with the first locking structure 4 to realize the centering of the fixture. This embodiment can accurately adjust the position of the fixture when the width of the sample is different, thereby improving the accuracy and efficiency of the test.

[0021] The width of the first vertical side 22 may be greater than the width of the first transverse side 21 to facilitate the arrangement of the second locking structure 23. The second locking structure 23 may include a slide groove 231, in which a screw 232 is arranged. The first locking structure 4 may include a threaded hole 5 that cooperates with the screw 232. The screw 232 may cooperate with the threaded hole 5, or may directly abut against the first locking structure 4, for example, when the first locking structure 4 is a metal block without a threaded hole. The second locking structure 23 may also be other forms of locking structures, such as a locking pin and a spring ring.

[0022] There may be multiple L-shaped centering mechanisms 2. In this embodiment, there are four L-shaped centering mechanisms 2, which are symmetrically distributed on both sides of the sample 3. The multiple L-shaped centering mechanisms 2 are distributed on the periphery of the fixed structure 1 and may be block-shaped.

[0023] The first locking structure 4 may also include an inverted L-shaped centering structure 6 fixedly connected to the outer side of the end 12, the inverted L-shaped centering structure 6 having a second transverse side 61 and a second vertical side 62, the second vertical side 62 being fixedly connected to the outer side of the end 12, and a threaded hole 5 being provided on the second vertical side 62. When the first locking structure 4 cooperates with the second locking structure 23, the first vertical side 22 and the second vertical side 62 completely overlap or partially overlap, and the extension directions of the first transverse side 21 and the second transverse side 61 are opposite. The first transverse side 21, the second transverse side 61, the first vertical side 22 and the second vertical side 62 may all be rectangular parallelepiped. The slide groove 231 may be a strip groove. A size scale may be provided on the first vertical side 22 or the second vertical side 62 to accurately adjust the position of the fixture when the width of the sample is different, thereby improving the accuracy and efficiency of the test.

[0024] Specifically, in one embodiment, the L-shaped centering mechanism 2 is a steel slotted L-shaped block that cooperates with the locking screw. The steel slotted L-shaped block has a wide side and a narrow side that form an L shape, such as Figure 2 As shown: the size of the narrow side of the steel slotted L-shaped stopper, that is, the size of the first horizontal side 21, can be 27×3×4mm in length, width and thickness; the size of the wide side of the steel slotted L-shaped stopper, that is, the size of the first vertical side 22, can be 31×11×4mm in length, width and thickness; the size of the L-shaped stopper slot, that is, the size of the slide groove 231 can be: 25×3.5×4mm in length, width and thickness. The size of the locking screw 232 is: the screw diameter is 2.85mm. The depth of the thread in the threaded hole 5 is 10mm.

[0025] In summary, in a specific embodiment, the technical solution disclosed in the utility model can be composed of 4 steel slotted L-shaped blocks and 4 locking screws. Before use, four holes are first punched on the surface and side of the fixture, the apertures match the locking screws, laser engraving is set on the surface and side of the fixture, and the middle of the fixture is the zero position. When in use, measure the width of the sample, and then position the narrow edges of the four steel slotted L-shaped blocks to the corresponding scales, lock the screws, and embed the sample in the middle of the block to ensure that the sample is centered. For example: if the width of the sample is 10mm, you only need to adjust the block 5mm from the zero position to both sides. Therefore, the utility model can easily realize the centering of the fixture and meet the centering requirements in the width direction when testing samples of different specifications.

Claims

1. A sample centering device, characterized in that: include: The fixing mechanism (1) is symmetrically arranged relative to the sample (3), and comprises a main body (11) and an end portion (12), wherein the main body (11) is clamped on both sides of the sample (3), the end portion (12) is arranged at the end of the main body (11), and a first locking structure (4) for centering the sample (3) is arranged outside the end portion (12); as well as The L-shaped centering mechanism (2) is symmetrically arranged relative to the sample (3), and has a first transverse side (21) and a first vertical side (22), wherein the first vertical side (22) is connected to the first transverse side (21) to form an L shape, the first transverse side (21) abuts against the sample (3), and the first vertical side (22) is provided with a second locking structure (23) for centering the sample (3), and the second locking structure (23) cooperates with the first locking structure (4).

2. The sample centering device according to claim 1, characterized in that: The width of the first vertical side (22) is greater than the width of the first transverse side (21).

3. The sample centering device according to claim 1, characterized in that: The second locking structure (23) comprises a sliding groove (231), and a screw (232) is arranged in the sliding groove (231).

4. The sample centering device according to claim 3, characterized in that: The first locking structure (4) comprises a threaded hole (5) that cooperates with the screw (232).

5. The sample centering device according to claim 4, characterized in that: The first locking structure (4) further comprises an inverted L-shaped centering structure fixedly connected to the outer side of the end portion (12), the inverted L-shaped centering structure having a second transverse side (61) and a second vertical side (62), the second vertical side (62) being fixedly connected to the outer side of the end portion (12), and the threaded hole (5) being provided on the second vertical side (62).

6. The sample centering device according to claim 5, characterized in that: The first transverse side (21), the second transverse side (61), the first vertical side (22) and the second vertical side (62) are all in the shape of a rectangular parallelepiped; and the sliding groove (231) is a strip groove.

7. The sample centering device according to claim 6, characterized in that: When the second locking structure (23) and the first locking structure (4) are locked together, the first vertical side edge (22) overlaps with the second vertical side edge (62), and the extension direction of the first lateral side edge (21) is opposite to the extension direction of the second lateral side edge (61).

8. The sample centering device according to claim 1, characterized in that: The first vertical side edge (22) or the second vertical side edge (62) is provided with a size scale.

9. The sample centering device according to claim 1, characterized in that: The L-shaped centering mechanisms (2) are provided in plurality and are symmetrically distributed on both sides of the sample (3).

10. The sample centering device according to claim 9, characterized in that: The plurality of L-shaped centering mechanisms (2) are distributed on the periphery of the fixing mechanism (1).

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