A device for testing the shear force of a fiber cement-based material

Abstract

The utility model discloses a kind of fibre cement-based material shearing force testing devices, belong to shearing force test technical field. Including pedestal, the four corners of pedestal upper surface are all fixedly connected with pillar, the upper surface of the pillar is fixedly connected with top plate, the upper surface of the top plate is provided with driving mechanism, the middle part of the inner side of the pedestal is provided with clamping mechanism. The fibre cement-based material shearing force testing device is driven when testing by driving mechanism, sliding plate drives tooth plate to move downwards, makes gear rotate, is shielded and protected by supporting rod to drive first protective plate to test area, prevent sample from breaking and causing accidental injury to personnel during testing process, guarantee the performance of testing operation, it is convenient to use, and safety performance is high, after sample testing, driving mechanism is reset upwards, two groups of first protective plate are relatively opened, convenient for taking and placing test sample, increase the convenience of use.

Description

Technical Field

[0001] This utility model relates to the field of shear force testing technology, and in particular to a shear force testing device for fiber cement-based materials. Background Technology

[0002] Fiber cement-based materials are composite materials with cement as the base material and fibers added as reinforcement. These materials typically consist of silicate cement as the matrix, alkali-resistant glass fibers, general-purpose synthetic fibers, ceramic fibers, carbon fibers, aramid fibers, metal wires, and natural plant and mineral fibers as reinforcements, along with fillers, chemical additives, and water, all manufactured through a composite process.

[0003] When fiber cement-based materials are applied to buildings, structural strength tests are generally required, and shear force testing of fiber cement-based materials is crucial in this process.

[0004] While existing material shear force testing devices can test materials of different sizes, they lack protective mechanisms. When testing test blocks, if the quality of the test blocks is poor and the testing pressure is too high, the test blocks can easily shatter and fly, causing injury to workers. The protective effect is poor and there are safety hazards. To address these issues, we propose a fiber cement-based material shear force testing device. Utility Model Content

[0005] The purpose of this invention is to provide a shear force testing device for fiber cement-based materials, which aims to solve the problem of the lack of protective mechanisms in existing shear force testing devices.

[0006] To solve the above-mentioned technical problems, this utility model provides a shear force testing device for fiber cement-based materials, including a base, with pillars fixedly connected to the four corners of the upper surface of the base, a top plate fixedly connected to the upper surface of the pillars, a driving mechanism provided on the upper surface of the top plate, a clamping mechanism provided in the middle of the inner side of the base, linkage mechanisms provided on both sides of the outer surface of the driving mechanism, and a protective mechanism provided on the outer surface of the pillars; the protective mechanism includes a connecting block fixed to the bottom of the outer surface of the pillars, a support rod rotatably connected to the inner side of the connecting block, and a first protective plate fixedly connected to the middle of the outer surface of the support rod; the linkage mechanism includes gears fixed to both sides of the outer surface of the support rod, toothed plates meshing with the outer surfaces of the gears, and the toothed plates being fixedly connected to the driving mechanism.

[0007] Preferably, a spring is fixedly connected to the inner bottom wall of the first protective plate, and an extension plate is fixedly connected to one end of the spring, with the extension plate being slidably connected to the first protective plate.

[0008] Preferably, a second protective plate is fixedly connected to both sides of the upper surface of the base, and the second protective plate is made of a rigid and transparent material.

[0009] Preferably, a guide block is fixedly connected to the front of the toothed plate, and a guide groove is provided on the inner side of the second protective plate near the guide block.

[0010] Preferably, the drive mechanism includes an electro-hydraulic servo motor fixed to the middle of the upper surface of the top plate, and the output end of the electro-hydraulic servo motor is fixedly connected to a slide plate, which is fixedly connected to the toothed plate.

[0011] Preferably, each of the four corners of the outer surface of the skateboard is rotatably connected with a threaded sleeve, and the threaded sleeve is threadedly connected to the support column.

[0012] Preferably, the clamping mechanism includes a load-bearing block fixed to the middle of the upper surface of the base, a first clamping member fixedly connected to the upper surface of the load-bearing block, a second clamping member fixedly connected to the middle of the lower surface of the slide plate, an adjusting rod threadedly connected to the middle of the front side of the first clamping member, and a clamping block fixedly connected to one end of the adjusting rod.

[0013] Preferably, the inner sides of both the first and second clamping members are movably connected to test blocks, and displacement gauges are fixedly connected to both sides of the front of the test blocks.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The fiber cement-based material shear force testing device of this utility model, when the drive mechanism drives the test, the slide moves the toothed plate downward, causing the gear to rotate. The support rod drives the first protective plate to shield and protect the test area, preventing the sample from breaking during the test and causing accidental injury to personnel, ensuring the test operation, convenient to use, and with high safety performance. After the sample is tested, the drive mechanism resets upward, and the two sets of first protective plates open relative to each other, making it easy to pick up and put down the test sample, increasing the convenience of use;

[0016] 2. The fiber cement-based material shear force testing device of this utility model has a first clamping member and a second clamping member used in cooperation to clamp and fix the test block. Under the action of the electro-hydraulic servo motor, the positions of the two members can be adjusted to adapt to test blocks of different sizes within a certain range, thus expanding the scope of application. Two displacement gauges are fixed on the surface of the test block to conduct diagonal shear loading tests. The two displacement gauges can detect and record the vertical compression displacement and horizontal tensile displacement of the specimen, respectively, making the test more accurate. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of a shear force testing device for fiber cement-based materials provided by this utility model;

[0018] Figure 2 This is a cross-sectional planar structural schematic diagram of a fiber cement-based material shear force testing device provided by this utility model;

[0019] Figure 3 This is a schematic diagram of the base surface structure of a fiber cement-based material shear force testing device provided by this utility model;

[0020] Figure 4 This is a schematic diagram of the drive mechanism structure of a fiber cement-based material shear force testing device provided by this utility model;

[0021] Figure 5 This is a schematic diagram of the linkage mechanism and protection mechanism of a fiber cement-based material shear force testing device provided by this utility model;

[0022] Figure 6 This is a schematic diagram of the clamping mechanism of a fiber cement-based material shear force testing device provided by this utility model.

[0023] In the diagram: 1. Base; 2. Support column; 3. Top plate; 4. Drive mechanism; 401. Electro-hydraulic servo motor; 402. Slide plate; 403. Screw sleeve; 5. Clamping mechanism; 501. Load-bearing block; 502. First clamping component; 503. Second clamping component; 504. Adjusting rod; 505. Clamping block; 506. Test block; 507. Displacement gauge; 6. Linkage mechanism; 601. Gear; 602. Gear plate; 603. Guide block; 604. Guide groove; 7. Protective mechanism; 701. Connecting block; 702. Support rod; 703. First protective plate; 704. Spring; 705. Extension plate; 706. Second protective plate. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0027] This invention provides a shear force testing device for fiber cement-based materials. Please refer to [link / reference]. Figures 1-6 The system includes a base 1, with support columns 2 fixedly connected to the four corners of the upper surface of the base 1, a top plate 3 fixedly connected to the upper surface of the support columns 2, a drive mechanism 4 provided on the upper surface of the top plate 3, a clamping mechanism 5 provided in the middle of the inner side of the base 1, linkage mechanisms 6 provided on both sides of the outer surface of the drive mechanism 4, and a protective mechanism 7 provided on the outer surface of the support columns 2. The protective mechanism 7 includes a connecting block 701 fixed to the bottom of the outer surface of the support column 2, a support rod 702 rotatably connected to the inner side of the connecting block 701, and a first protective plate 703 fixedly connected to the middle of the outer surface of the support rod 702.

[0028] The linkage mechanism 6 includes gears 601 fixed on both sides of the outer surface of the support rod 702. Gear plates 602 are meshed with the outer surfaces of the gears 601, and the gear plates 602 are fixedly connected to the drive mechanism 4. A spring 704 is fixedly connected to the inner bottom wall of the first protective plate 703. An extension plate 705 is fixedly connected to one end of the spring 704, and the extension plate 705 is slidably connected to the first protective plate 703.

[0029] A second protective plate 706 is fixedly connected to both sides of the upper surface of the base 1. The second protective plate 706 is made of a rigid and transparent material.

[0030] A guide block 603 is fixedly connected to the front of the toothed plate 602, and a guide groove 604 is provided on the inner side of the second protective plate 706 near the guide block 603.

[0031] The drive mechanism 4 includes an electro-hydraulic servo motor 401 fixed in the middle of the upper surface of the top plate 3. The output end of the electro-hydraulic servo motor 401 is fixedly connected to a slide plate 402, which is fixedly connected to the toothed plate 602. Screw sleeves 403 are rotatably connected to the four corners of the outer surface of the slide plate 402, and the screw sleeves 403 are threadedly connected to the support column 2.

[0032] The clamping mechanism 5 includes a load-bearing block 501 fixed in the middle of the upper surface of the base 1. A first clamping member 502 is fixedly connected to the upper surface of the load-bearing block 501. A second clamping member 503 is fixedly connected to the middle of the lower surface of the slide plate 402. An adjusting rod 504 is threadedly connected to the middle of the front side of the first clamping member 502. A clamping block 505 is fixedly connected to one end of the adjusting rod 504.

[0033] The inner sides of the first clamping member 502 and the second clamping member 503 are movably connected to the test block 506, and the two sides of the front of the test block 506 are fixedly connected to the displacement gauge 507.

[0034] It should be noted that the base 1 is used to support the various mechanisms of the fixing device. The four sets of pillars 2 support the top plate 3, which in turn supports the drive mechanism 4. The clamping mechanism 5 clamps the test sample. Under the action of the drive mechanism 4, the sample is subjected to shear force testing. At the same time, the linkage mechanism 6 drives the protective mechanism 7 to rotate, shielding and protecting the test area. The support rod 702 is set on the outer surface of the pillar 2 through the connecting block 701. The middle part of the support rod 702 is used to connect the first protective plate 703. The two ends are connected to the toothed plate 602 through the gear 601. When the drive mechanism 4 drives the test, the slide plate 402 drives the toothed plate 602 to move downward, causing the gear 601 to rotate. The support rod 702 drives the first protective plate 703 to shield and protect the test area, preventing the sample from breaking during the test and causing accidental injury to personnel. This ensures the smooth operation of the test, is convenient to use, and has high safety performance. After the sample is tested, the drive mechanism 4 resets upward, and the two sets of first protective plates 703 open relative to each other, making it easy to put in and take out the test sample, increasing the convenience of use.

[0035] Preferably, the extension plate 705 is slidably connected inside the first protective plate 703. When the first protective plate 703 rotates to the underside of the slide plate 402, the extension plate 705 can retract into the first protective plate 703 under the action of external force. At the same time, the spring 704 is compressed to avoid conflict between the device drive mechanism 4 and the protective mechanism 7. When the drive mechanism 4 is reset, the extension plate 705 can be reset under the action of the spring 704 for easy use next time.

[0036] Preferably, two sets of the second protective plate 706 are provided, which are fixed on both sides of the upper surface of the base 1 respectively, to shield the front and back of the device. At the same time, the second protective plate 706 is made of high-strength transparent material, which makes it easy for staff to see the test status, while enhancing the protective effect and expanding the protection range.

[0037] Preferably, when the toothed plate 602 moves under the action of the sliding plate 402, the guide block 603 on its outer surface slides inside the guide groove 604 to guide and limit the movement of the toothed plate 602, avoid deviation, improve the reliability of linkage, and increase the stability during use.

[0038] Preferably, the electro-hydraulic servo motor 401 is a high-precision material testing device that mainly relies on a servo control system and hydraulic transmission technology. Its working principle is to drive a hydraulic pump through a servo motor to generate high-pressure liquid, thereby applying pressure to the sample. It can precisely control the applied pressure and speed to ensure the accuracy and repeatability of the test.

[0039] Preferably, the screw sleeve 403 is rotatably connected to the four corners of the outer surface of the slide plate 402, and is also threadedly connected to the support column 2, so as to avoid the position and angle displacement when the slide plate 402 moves, improve the accuracy of displacement, and ensure the accuracy of test data.

[0040] Preferably, the first clamping member 502 is fixed on the upper surface of the load-bearing block 501 and works in conjunction with the second clamping member 503 to clamp and fix the test block 506. Under the action of the electro-hydraulic servo motor 401, the positions of the two can be adjusted to accommodate test blocks 506 of different sizes within a certain range, thus expanding the scope of use. After the test block 506 is placed on the inner side of the first clamping member 502 and the second clamping member 503, the adjusting rod 504 is rotated to clamp and fix the test block 506 with the clamping block 505, preventing it from moving back and forth during testing.

[0041] Preferably, the test block 506 is made of fiber cement-based material and is placed between the first clamp 502 and the second clamp 503. Two displacement gauges 507 are fixed on the surface to conduct a diagonal shear load test. The two displacement gauges 507 can detect and record the vertical compressive displacement and horizontal tensile displacement of the specimen, respectively, making the test more accurate.

[0042] In summary, the test block 506 is placed on the first clamping member 502, and the adjusting rod 504 is rotated to clamp and fix the test block 505, preventing it from moving back and forth during the test. Two displacement gauges 507 are fixed on the surface of the test block 506. Under the action of the electro-hydraulic servo motor 401, the slide plate 402 moves downward, and the second clamping member 503 performs a diagonal shear test on the test block 506. The two displacement gauges 507 can detect and record the vertical compressive displacement and horizontal tensile displacement of the specimen. The screw sleeve 403 prevents the slide plate 402 from shifting in position and angle when it moves, thus improving the accuracy of the displacement. When the slide plate 402 moves, it drives the toothed plate 6. 02 moves downward, causing gear 601 to rotate. This, via support rod 702, drives the first protective plate 703 to shield and protect the test area, preventing sample breakage and accidental injury during testing. If the sample is too small, the first protective plate 703 rotates to the underside of the slide plate 402. Under external force, the extension plate 705 can retract into the interior of the first protective plate 703, while the spring 704 is compressed to prevent conflict between the device drive mechanism 4 and the protective mechanism 7. When the drive mechanism 4 resets, the two sets of first protective plates 703 open relative to each other. Under the action of spring 704, the extension plate 705 can reset for future use.

[0043] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A shear force testing device for fiber cement-based materials, characterized in that, Includes a base (1), with support columns (2) fixedly connected to the four corners of the upper surface of the base (1), a top plate (3) fixedly connected to the upper surface of the support column (2), a driving mechanism (4) provided on the upper surface of the top plate (3), a clamping mechanism (5) provided in the middle of the inner side of the base (1), a linkage mechanism (6) provided on both sides of the outer surface of the driving mechanism (4), and a protective mechanism (7) provided on the outer surface of the support column (2). The protective mechanism (7) includes a connecting block (701) fixed to the bottom of the outer surface of the support column (2), a support rod (702) is rotatably connected to the inner side of the connecting block (701), and a first protective plate (703) is fixedly connected to the middle of the outer surface of the support rod (702). The linkage mechanism (6) includes gears (601) fixed on both sides of the outer surface of the support rod (702). The outer surface of the gears (601) is meshed with a toothed plate (602), and the toothed plate (602) is fixedly connected to the drive mechanism (4).

2. The shear force testing device for fiber cement-based materials as described in claim 1, characterized in that, A spring (704) is fixedly connected to the inner bottom wall of the first protective plate (703), and an extension plate (705) is fixedly connected to one end of the spring (704). The extension plate (705) is slidably connected to the first protective plate (703).

3. The shear force testing device for fiber cement-based materials as described in claim 1, characterized in that, The base (1) has a second protective plate (706) fixedly connected to both sides of its upper surface. The second protective plate (706) is made of a rigid and transparent material.

4. The shear force testing device for fiber cement-based materials as described in claim 3, characterized in that, A guide block (603) is fixedly connected to the front of the toothed plate (602), and a guide groove (604) is provided on the inner side of the second protective plate (706) near the guide block (603).

5. The shear force testing device for fiber cement-based materials as described in claim 1, characterized in that, The drive mechanism (4) includes an electro-hydraulic servo motor (401) fixed in the middle of the upper surface of the top plate (3). The output end of the electro-hydraulic servo motor (401) is fixedly connected to a slide plate (402), and the slide plate (402) is fixedly connected to the toothed plate (602).

6. The shear force testing device for fiber cement-based materials as described in claim 5, characterized in that, The four corners of the outer surface of the slide plate (402) are rotatably connected with screw sleeves (403), and the screw sleeves (403) are threadedly connected to the support column (2).

7. The shear force testing device for fiber cement-based materials as described in claim 5, characterized in that, The clamping mechanism (5) includes a load-bearing block (501) fixed in the middle of the upper surface of the base (1). A first clamping member (502) is fixedly connected to the upper surface of the load-bearing block (501). A second clamping member (503) is fixedly connected to the middle of the lower surface of the slide plate (402). An adjusting rod (504) is threadedly connected to the middle of the front side of the first clamping member (502). A clamping block (505) is fixedly connected to one end of the adjusting rod (504).

8. The shear force testing device for fiber cement-based materials as described in claim 7, characterized in that, The inner sides of the first clamping member (502) and the second clamping member (503) are movably connected to the test block (506), and the two sides of the front of the test block (506) are fixedly connected to the displacement gauge (507).

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