Anti-backlash structure of dynamic compression-shear testing machine

Abstract

The utility model relates to the field of compression-shear testing machines, and discloses a dynamic anti-backlash structure of a compression-shear testing machine. The dynamic anti-backlash structure of the compression-shear testing machine comprises a testing machine main body which comprises a loading frame and a workbench installed in the loading frame; the loading frame is used for loading the working table, the working table is used for loading the working table, the loading frame is used for loading the working table, and the gap eliminating device is arranged between the loading frame and the working table and is used for eliminating a gap of the working table in the moving process. The reverse force provided by the elastic element is used for counteracting the gap in the moving process of the workbench, the elastic element in the gap eliminating device can eliminate the gap and absorb impact force and vibration generated in the testing process, abrasion between mechanical parts is reduced, the vibration amplitude of the testing machine is effectively reduced through the buffering function, and the testing efficiency is improved. The operation stability of the equipment is improved, the service life of the testing machine is prolonged, and the maintenance cost and the maintenance frequency of the equipment are reduced.

Description

Technical Field

[0001] This utility model relates to the field of compression-shear testing machines, and in particular to a gap-eliminating structure for a dynamic compression-shear testing machine. Background Technology

[0002] The dynamic compression-shear testing machine is a widely used physical performance testing instrument in the fields of physics and materials science. It is mainly used to conduct compression, bending, and shear mechanical property tests on concrete components, bridge rubber bearings, etc. However, existing dynamic compression-shear testing machines still have some technical problems in practical use, which limit their performance and application scope.

[0003] After long-term use, gaps can easily form between mechanical parts in existing dynamic compression-shear testing machines, leading to inaccurate measurements of loading force and displacement. These gaps not only affect the accuracy of the test results but may also result in poor repeatability of the test data. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a gap-eliminating structure for a dynamic compression-shear testing machine, which solves the problem of inaccurate measurement of loading force and displacement caused by gaps easily generated between mechanical components.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a backlash-eliminating structure for a dynamic compression-shear testing machine, comprising:

[0006] The main body of the testing machine includes a loading frame and a worktable installed within the loading frame;

[0007] A gap-eliminating device is installed between the loading frame and the worktable to eliminate gaps in the worktable during its movement.

[0008] The gap-eliminating device includes at least one elastic element connected between the loading frame and the worktable, which provides a counterforce to counteract the gap in the worktable.

[0009] Preferably, the backlash elimination device further includes a guiding mechanism for guiding the worktable to move in a predetermined direction. The guiding mechanism includes a guide rail and a guide slider. The guide rail is fixed to the loading frame, and the guide slider is connected to the worktable and slides in cooperation with the guide rail.

[0010] Preferably, the elastic element is a spring, one end of which is fixed to the loading frame and the other end is connected to the worktable.

[0011] Preferably, the spring is a compression spring or a tension spring, and the compression spring or tension spring is arranged along the movement direction of the worktable.

[0012] Preferably, the gap-eliminating device further includes an adjustment mechanism for adjusting the preload of the elastic element. The adjustment mechanism includes an adjustment nut and an adjustment screw. The adjustment screw is connected to the elastic element, and the adjustment nut is threadedly connected to the loading frame for adjusting the compression or tension state of the elastic element.

[0013] Preferably, the guide rail is a linear guide rail, the guide slider is a sliding block that cooperates with the linear guide rail, and the sliding block is fixedly connected to the worktable by fasteners.

[0014] Preferably, the loading frame includes an upper crossbeam, a lower crossbeam, and a column, the column connecting the upper crossbeam and the lower crossbeam, the workbench being mounted on the lower crossbeam, and the gap-eliminating device being mounted between the column and the workbench.

[0015] Preferably, the gap elimination device further includes a limiting mechanism for limiting the movement range of the worktable. The limiting mechanism includes a limiting block and a limiting switch. The limiting block is fixed to the worktable, and the limiting switch is installed on the loading frame for detecting the extreme position of the worktable.

[0016] Beneficial effects

[0017] This invention provides a backlash-free structure for a dynamic compression-shear testing machine. Compared with the prior art, it has the following advantages:

[0018] 1. In this utility model, by setting a gap elimination device between the loading frame and the worktable, the elastic element provides a counterforce to offset the gap during the movement of the worktable, effectively solving the test accuracy problem caused by mechanical gaps in traditional dynamic compression and shear testing machines. This significantly improves the accuracy and repeatability of test results, and is especially suitable for material mechanical property testing and structural fatigue testing with high precision requirements. The elastic element (such as a spring) in the gap elimination device can not only eliminate gaps, but also absorb the impact force and vibration generated during the test, reducing wear between mechanical parts. This buffering function effectively reduces the vibration amplitude of the testing machine, improves the operational stability of the equipment, extends the service life of the testing machine, and reduces the maintenance cost and repair frequency of the equipment.

[0019] 2. In this utility model, the adjustment mechanism allows users to flexibly adjust the preload of the elastic element according to the test requirements and the actual use of the equipment. This enables the machine to adapt to different test conditions and loading requirements, ensuring that the testing machine can maintain high-precision operation under various working conditions and enhancing the versatility and adaptability of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front three-dimensional structure of a backlash-eliminating structure for a dynamic compression-shear testing machine proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the rear three-dimensional structure of a backlash-eliminating structure for a dynamic compression-shear testing machine proposed in this utility model;

[0022] Figure 3 This is a structural schematic diagram of the gap-eliminating structure of a dynamic compression-shear testing machine proposed in this utility model, viewed from an oblique upper angle.

[0023] Figure 4 This utility model proposes a backlash-free structure for a dynamic compression-shear testing machine. Figure 3 A magnified view of A in the middle.

[0024] Legend:

[0025] 1. Main body of the testing machine; 2. Loading frame; 3. Workbench; 4. Backlash elimination device; 5. Elastic element; 6. Guiding mechanism; 601. Guide rail; 602. Guide slider; 7. Adjusting mechanism; 701. Adjusting nut; 702. Adjusting screw; 8. Upper crossbeam; 9. Lower crossbeam; 10. Column; 11. Limiting mechanism; 1101. Limiting block; 1102. Limit switch. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-4 This utility model provides two technical solutions, specifically including the following embodiments:

[0028] Example 1:

[0029] A backlash elimination structure for a dynamic compression-shear testing machine includes: a testing machine body 1, which includes a loading frame 2 and a worktable 3 installed within the loading frame 2; a backlash elimination device 4, installed between the loading frame 2 and the worktable 3, for eliminating the gap in the worktable 3 during movement; the backlash elimination device 4 also includes a guide mechanism 6, which guides the worktable 3 to move in a predetermined direction; the guide mechanism 6 includes a guide rail 601 and a guide slider 602; the guide rail 601 is fixed to the loading frame 2; the guide slider 602 is connected to the worktable 3 and slides in cooperation with the guide rail 601; the guide rail 601 is a linear guide rail; the guide slider 602 is a sliding block that cooperates with the linear guide rail; the sliding block is fixedly connected to the worktable 3 by fasteners.

[0030] The gap-eliminating device 4 includes at least one elastic element 5, which is connected between the loading frame 2 and the worktable 3 to provide a counterforce to counteract the gap of the worktable 3. The elastic element 5 is a spring, one end of which is fixed to the loading frame 2 and the other end is connected to the worktable 3. The spring is a compression spring or a tension spring, which is set along the movement direction of the worktable 3.

[0031] During operation, a backlash elimination device 4 is installed between the loading frame 2 and the worktable 3. The elastic element 5 provides a counterforce to offset the gaps in the movement of the worktable 3, effectively solving the problem of test accuracy caused by mechanical backlash in traditional dynamic compression-shear testing machines. This structural design ensures the precise transmission of loading force and displacement during the test, significantly improving the accuracy and repeatability of test results. It is particularly suitable for material mechanical property testing and structural fatigue testing where high precision is required. The elastic element 5 in the backlash elimination device 4, such as a spring, not only eliminates gaps but also absorbs the impact force and vibration generated during the test, reducing wear between mechanical parts. This buffering function effectively reduces the vibration amplitude of the testing machine, improves the operational stability of the equipment, extends the service life of the testing machine, and reduces the maintenance cost and repair frequency.

[0032] Example 2:

[0033] Based on Embodiment 1, the gap-eliminating device 4 further includes an adjusting mechanism 7. The adjusting mechanism 7 is used to adjust the preload of the elastic element 5. The adjusting mechanism 7 includes an adjusting nut 701 and an adjusting screw 702. The adjusting screw 702 is connected to the elastic element 5, and the adjusting nut 701 is threadedly connected to the loading frame 2. It is used to adjust the compression or tension state of the elastic element 5. The loading frame 2 includes an upper crossbeam 8, a lower crossbeam 9, and a column 10. The column 10 connects the upper crossbeam 8 and the lower crossbeam 9. The workbench 3 is installed on the lower crossbeam 9. The gap-eliminating device 4 is installed between the column 10 and the workbench 3. It also includes a limiting mechanism 11, which is used to limit the movement range of the worktable 3. The limiting mechanism 11 includes a limiting block 1101 and a limiting switch 1102. The limiting block 1101 is fixed to the worktable 3, and the limiting switch 1102 is installed on the loading frame 2 to detect the extreme position of the worktable 3. The adjustment mechanism 7 allows users to flexibly adjust the preload of the elastic element 5 according to the test requirements and the actual use of the equipment. It can adapt to different test conditions and loading requirements, ensuring that the testing machine can maintain high-precision operation under various working conditions, and enhancing the versatility and adaptability of the equipment.

[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dynamic compression-shear testing machine anti-backlash structure, characterized in that, The test machine body (1) comprises a loading frame (2) and a workbench (3) mounted in the loading frame (2); a clearance elimination device (4) is mounted between the loading frame (2) and the workbench (3) to eliminate the clearance of the workbench (3) during movement; wherein the clearance elimination device (4) comprises at least one elastic element (5) connected between the loading frame (2) and the workbench (3) to provide a counteracting force to offset the clearance of the workbench (3). The clearance elimination device (4) further comprises a guide mechanism (6) for guiding the movement of the workbench (3) in a predetermined direction, the guide mechanism (6) comprising a guide rail (601) fixed to the loading frame (2) and a guide slider (602) connected to the workbench (3) and slidingly matched with the guide rail (601). The elastic element (5) is a spring, one end of which is fixed to the loading frame (2) and the other end of which is connected to the workbench (3). The spring is a compression spring or a tension spring arranged in the direction of movement of the workbench (3).

2. The dynamic compression-shear test machine gap elimination structure according to claim 1, characterized in that, The clearance elimination device (4) further comprises an adjusting mechanism (7) for adjusting the pre-tightening force of the elastic element (5), the adjusting mechanism (7) comprising an adjusting nut (701) and an adjusting screw (702), the adjusting screw (702) being connected to the elastic element (5) and the adjusting nut (701) being threadedly connected to the loading frame (2) to adjust the compression or tension state of the elastic element (5).

3. The dynamic compression-shear test machine gap elimination structure of claim 1, wherein, The guide rail (601) is a linear guide rail and the guide slider (602) is a sliding block matched with the linear guide rail, the sliding block being fixedly connected to the workbench (3) by a fastener.

4. The dynamic compression-shear test machine gap elimination structure according to claim 3, characterized in that, The loading frame (2) comprises an upper cross beam (8), a lower cross beam (9) and a column (10), the column (10) connecting the upper cross beam (8) and the lower cross beam (9), the workbench (3) being mounted on the lower cross beam (9) and the clearance elimination device (4) being mounted between the column (10) and the workbench (3).

5. The dynamic compression-shear test machine gap elimination structure of claim 1 wherein, The clearance elimination device (4) further comprises a limiting mechanism (11) for limiting the movement range of the workbench (3), the limiting mechanism (11) comprising a limiting block (1101) fixed to the workbench (3) and a limiting switch (1102) mounted on the loading frame (2) to detect the limit position of the workbench (3).

6. The dynamic compression-shear test machine lost motion structure of claim 2, wherein, ​ 7. The dynamic compression-shear test machine gap elimination structure of claim 1 wherein, ​ 8. The dynamic compression-shear test machine gap elimination structure of claim 1 wherein, ​

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