An asphalt concrete tensile test conditioning assembly
The electric push rod driven adjustment component and spring insert design solve the problem of sample slippage caused by traditional fixing methods, realize precise clamping and convenient fixture replacement, and improve the accuracy and adaptability of asphalt concrete tensile testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN LUDAXIN ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-02-26
- Publication Date
- 2026-06-16
AI Technical Summary
In asphalt concrete tensile tests, traditional fixing methods cause the specimen to slip, resulting in inaccurate measurement data.
The adjustment assembly, driven by an electric push rod, achieves precise and uniform clamping of asphalt concrete samples through the cooperation of moving blocks, adjustment plates, and sliders. Combined with the spring and insert rod design, it is easy to replace clamps of different shapes.
It improves the accuracy of test results and the ease of operation, adapts to samples of various shapes and sizes, and meets a variety of test requirements.
Smart Images
Figure CN224365860U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tensile testing technology for asphalt concrete, and in particular to an adjustment component for tensile testing of asphalt concrete. Background Technology
[0002] Asphalt concrete is a commonly used pavement material, composed of asphalt, aggregates (including coarse aggregates, fine aggregates, and fillers), and additives. It possesses good elasticity and plasticity, enabling it to withstand traffic loads and temperature variations, making it an important material in modern road construction. The asphalt concrete tensile test is a method for evaluating the performance of this material under tensile stress. This test helps to understand the material's tensile strength and ductility, particularly its performance under temperature changes and traffic loads.
[0003] When conducting tensile tests on asphalt concrete, the asphalt concrete specimen must first be fixed onto the testing apparatus. Then, the tensile testing machine is started, and tensile force is applied to complete the tensile test. Traditional fixing methods typically involve mechanically applying clamping force by rotating screws or nuts. While this method can secure the asphalt concrete specimen, it allows the specimen to slide within the clamps during the tensile process, leading to inaccurate measurement data. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides an adjustment component for asphalt concrete tensile testing, which aims to improve the problem in the prior art where the specimen slides in the clamp during the tensile process, resulting in inaccurate measurement data.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] An adjustment assembly for a tensile test of asphalt concrete includes a base, a test platform fixedly connected to the upper part of the base, a tensile assembly mounted on the upper part of the test platform, the tensile assembly being used to perform tensile testing on asphalt concrete, a mounting plate fixedly connected to the upper part of the tensile assembly, an electric push rod fixedly connected to the outside of the mounting plate, a moving block fixedly connected to the output end of the electric push rod, adjustment plates rotatably connected to both sides of the outside of the moving block, fixed rods fixedly connected to both sides of the inside of the mounting plate, sliders slidably connected to the outside of the two fixed rods, the other ends of the two adjustment plates rotatably connected to the outside of the two sliders, connecting plates fixedly connected to the outside of the two sliders, mounting blocks fixedly connected to the outside of the two connecting plates, mounting columns inserted into the inside of the two mounting blocks, and clamping plates fixedly connected to the bottom of the two mounting columns.
[0007] Furthermore, each of the two mounting blocks is fixedly connected to a mounting tube, a sliding block is slidably connected inside the mounting tube, a pull ring is fixedly connected to the lower part of the sliding block, an insertion rod is fixedly connected to the outside of the sliding block, a telescopic rod is fixedly connected inside the mounting tube, the top of the telescopic rod is fixedly connected to the outside of the sliding block, and a spring is sleeved on the outside of the telescopic rod.
[0008] Furthermore, the tensile assembly includes a dual-head motor, which is fixedly connected to the upper middle part of the test bench. Each output end of the dual-head motor is fixedly connected to a lead screw, and both lead screws are threadedly connected to guide blocks. Limit blocks are fixedly connected to the outside of the guide blocks.
[0009] Furthermore, the mounting plate has first through holes on both sides inside, and the two fixing rods are fixedly connected inside the two first through holes.
[0010] Furthermore, a second through hole is provided on the right side inside the mounting tube, and the insertion rod is slidably connected inside the second through hole.
[0011] Furthermore, the mounting column has an insertion hole inside, and the insertion rod is inserted into the insertion hole.
[0012] Furthermore, a third through hole is provided inside the mounting tube, and the pull ring is slidably connected inside the third through hole.
[0013] Furthermore, limit grooves are provided on both sides of the interior of the test bench, and the two limit blocks are slidably connected inside the two limit grooves.
[0014] This utility model has the following beneficial effects:
[0015] 1. In this invention, during the tensile test of asphalt concrete, one end of the sample is first placed between two clamping plates. The electric actuator is then activated, causing the moving block and the connected adjusting plate to move. The adjusting plate moves the slider relative to the outside of the fixed rod, thereby causing the connecting plate and the mounting block to move relative to each other, and subsequently the mounting column and the clamping plates to move relative to each other, thus fixing the sample. The other end of the sample is fixed in the same way. Compared to the traditional method of rotating screws or nuts, this method provides a more precise and uniform clamping force, avoiding uneven clamping force caused by manual operation and improving the accuracy of the test results.
[0016] 2. In this invention, the sliding block moves the insert rod by moving the pull ring, which in turn compresses the telescopic rod, causing the spring to deform. When the insert rod disengages from the insertion hole, the clamping plate and mounting post can be removed. During installation, the mounting post is inserted into the mounting block, the pull ring is released, and the insert rod is inserted into the insertion hole under the spring's reaction force. This design facilitates the replacement of clamps of different shapes, adapts to asphalt concrete samples of various shapes and sizes, and meets diverse testing needs. Attached Figure Description
[0017] Figure 1 This is a perspective view of an adjustment component for a tensile test of asphalt concrete proposed in this utility model.
[0018] Figure 2 This is a schematic diagram of the tension block structure of the adjustment component for a tensile test of asphalt concrete proposed in this utility model.
[0019] Figure 3 This is a schematic diagram of the external structure of the mounting plate of the adjustment component for a tensile test of asphalt concrete proposed in this utility model.
[0020] Figure 4 This is a schematic diagram of the internal structure of the installation tube of the adjustment component for a tensile test of asphalt concrete proposed in this utility model.
[0021] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.
[0022] Legend:
[0023] 1. Base; 2. Test bench; 3. Tensile assembly; 301. Dual-head motor; 302. Lead screw; 303. Guide block; 304. Limiting block; 4. Limiting groove; 5. Mounting plate; 6. Electric push rod; 7. Moving block; 8. Adjusting plate; 9. First through hole; 10. Fixing rod; 11. Sliding block; 12. Connecting plate; 13. Mounting block; 14. Mounting column; 15. Clamping plate; 16. Mounting tube; 17. Sliding block; 18. Pull ring; 19. Telescopic rod; 20. Spring; 21. Insert rod; 22. Second through hole; 23. Insertion hole; 24. Third through hole. Detailed Implementation
[0024] 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.
[0025] Reference Figure 1 , Figure 2 and Figure 3This utility model provides an embodiment of an adjustment component for a tensile test of asphalt concrete, comprising a base 1, a test platform 2 fixedly connected to the upper part of the base 1, a tensile component 3 disposed on the upper part of the test platform 2, the tensile component 3 being used to perform tensile testing on asphalt concrete, a mounting plate 5 fixedly connected to the upper part of the tensile component 3, an electric push rod 6 fixedly connected to the outside of the mounting plate 5, a moving block 7 fixedly connected to the output end of the electric push rod 6, adjusting plates 8 rotatably connected to both sides of the moving block 7, fixing rods 10 fixedly connected to both sides of the inside of the mounting plate 5, sliders 11 slidably connected to the outside of the two fixing rods 10, the other ends of the two adjusting plates 8 rotatably connected to the outside of the two sliders 11, and connecting plates 1 fixedly connected to the outside of the two sliders 11. 2. Mounting blocks 13 are fixedly connected to the outside of the two connecting plates 12. Mounting columns 14 are inserted into the inside of the two mounting blocks 13. Clamping plates 15 are fixedly connected to the bottom of the two mounting columns 14. The tensile assembly 3 includes a double-headed motor 301. The double-headed motor 301 is fixedly connected to the upper middle part of the test bench 2. The output end of the double-headed motor 301 is fixedly connected to a lead screw 302. Guide blocks 303 are threadedly connected to the outside of the two lead screws 302. Limiting blocks 304 are fixedly connected to the outside of the guide blocks 303. First through holes 9 are opened on both sides of the inside of the mounting plate 5. Two fixing rods 10 are fixedly connected to the inside of the two first through holes 9. Limiting grooves 4 are opened on both sides of the inside of the test bench 2. The two limiting blocks 304 are slidably connected to the inside of the two limiting grooves 4.
[0026] When conducting a tensile test on asphalt concrete, firstly, one end of the asphalt concrete sample is placed in the middle of the two clamping plates 15 to ensure the sample is stable in its initial fixed position. Next, the electric push rod 6 is activated. Activation of the electric push rod 6 will move the movable block 7 fixed at its output end. During the movement of the movable block 7, it will synchronously move the adjusting plates 8 rotatably connected to both external sides. The movement of these two adjusting plates 8 will further push the two sliders 11 rotatably connected at the other end to move relative to each other outside the two fixed rods 10. As the two sliders 11 move relative to each other, the two connecting plates 12 fixed to the outside of the sliders 11 will also move relative to each other. The relative movement of the two connecting plates 12 will, in turn, move the two externally fixed mounting blocks 13 relative to each other. As the mounting blocks 13 move relative to each other, the two internally inserted mounting columns 14 will also move relative to each other. When the two mounting columns 14 move relative to each other, the two clamping plates 15 fixed at the bottom will also move relative to each other. Through the relative movement of the two clamping plates 15, the asphalt concrete sample to be tested can be firmly clamped and fixed. To ensure the stability and uniformity of the sample fixation, the above steps need to be repeated to fix the other end of the sample in the same way. This facilitates the fixation of the sample to be tested. Unlike traditional fixation methods that usually apply clamping force mechanically by rotating screws or nuts, this fixation method can provide more precise and uniform clamping force, avoiding the problem of uneven clamping force caused by manual operation, thereby improving the accuracy of test results. When performing tensile tests on asphalt concrete samples, the dual-head motor 301 is started. The dual-head motor 301 drives the two lead screws 302 fixed at the output end to rotate. The rotation of the two lead screws 302 causes the guide blocks 303 connected to the external threads on both sides to move away from each other. When the two guide blocks 303 move away from each other, the asphalt concrete sample fixed at the top is subjected to tensile test. During the tensile process, the strain of the sample under different tensile forces can be obtained through sensor data, and its mechanical properties can be analyzed.
[0027] Reference Figure 4 and Figure 5 Both mounting blocks 13 are fixedly connected to mounting tubes 16. Sliding blocks 17 are slidably connected inside mounting tubes 16. Pull rings 18 are fixedly connected to the lower part of sliding blocks 17. Insert rods 21 are fixedly connected to the outside of sliding blocks 17. Telescopic rods 19 are fixedly connected inside mounting tubes 16. The top of telescopic rods 19 is fixedly connected to the outside of sliding blocks 17. Springs 20 are sleeved on the outside of telescopic rods 19. A second through hole 22 is opened on the right side inside mounting tubes 16. Insert rods 21 are slidably connected inside the second through hole 22. Insertion holes 23 are opened inside mounting posts 14. Insert rods 21 are inserted into insertion holes 23. A third through hole 24 is opened inside mounting tubes 16. Pull rings 18 are slidably connected inside the third through hole 24.
[0028] When it is necessary to replace the clamping plate 15 with a different shape, firstly, move the pull ring 18. The movement of the pull ring 18 causes the upper fixed sliding block 17 to move as well. As the sliding block 17 moves, the externally fixed insertion rod 21 also moves accordingly. During this process, the sliding block 17 drives the insertion rod 21 to move outward, thereby compressing the externally fixed telescopic rod 19. Since the telescopic rod 19 deforms under force, the externally sleeved spring 20 will deform synchronously and accumulate energy. When the insertion rod 21 is completely disengaged from the insertion hole 23, the clamping plate 15 and the mounting post 14 can be easily removed from the mounting block 13. Next, a suitable clamping plate 15 can be replaced according to the different shapes and sizes of the asphalt concrete samples. Whether the sample is square, round, or irregular in shape, a corresponding clamp can be found for effective fixation, thereby meeting various test requirements. After the clamp replacement is completed, the process of installing the new clamping plate 15 and mounting post 14 is also very simple. Just insert the mounting post 14 into the mounting block 13 and then release the pull ring 18. Under the reaction force of spring 20, the insertion rod 21 automatically inserts into the insertion hole 23, ensuring a stable and secure installation. This design not only greatly improves the convenience and efficiency of operation but also enhances the adaptability of the equipment, enabling it to flexibly handle samples of various shapes and sizes and meet the testing needs under various experimental conditions. By replacing the clamping plates 15 with different shapes, not only is the reliability of sample fixation ensured, but also the accuracy and consistency of test results are guaranteed.
[0029] Working Principle: When conducting a tensile test on asphalt concrete, firstly, one end of the asphalt concrete sample is placed in the middle of two clamping plates 15. Then, the electric push rod 6 is activated. The electric push rod 6 moves the moving block 7 fixed at the output end. The movement of the moving block 7 moves the adjusting plates 8 rotatably connected to both sides on the outside. The movement of the two adjusting plates 8 moves the two sliders 11 rotatably connected to the other end relative to each other outside the two fixed rods 10. The relative movement of the two sliders 11 moves the two connecting plates 12 fixed to the outside relative to each other. The relative movement of the two connecting plates 12 moves the two mounting blocks 13 fixed to the outside relative to each other. The relative movement of the two mounting blocks 13 moves the two internally inserted mounting columns 14 relative to each other. The relative movement of the two mounting columns 14 moves the two clamping plates 15 fixed at the bottom relative to each other. The relative movement of the two clamping plates 15 fixes the asphalt concrete sample to be tested. The other end of the sample is fixed in the same way. This method facilitates the fixing of the sample to be tested, unlike traditional fixing methods that usually apply clamping force mechanically by rotating screws or nuts. This fixing method provides more... Precise and uniform clamping force avoids the problem of uneven clamping force caused by manual operation, thereby improving the accuracy of test results. Then, when it is necessary to change the clamping plate 15 of different shapes, by moving the pull ring 18, the pull ring 18 moves, causing the upper fixed sliding block 17 to move, and the sliding block 17 moves, causing the externally fixed insertion rod 21 to move. When the sliding block 17 moves with the externally fixed insertion rod 21, it compresses the externally fixed telescopic rod 19. When the telescopic rod 19 deforms under force, the externally sleeved spring 20 deforms synchronously. Then, when When the insertion rod 21 is disengaged from the insertion hole 23, the clamping plate 15 and the mounting post 14 can be removed from the mounting block 13. During installation, the mounting post 14 is inserted into the mounting block 13, and then the pull ring 18 is released. Under the reaction force of the spring 20, the insertion rod 21 is inserted into the insertion hole 23. This allows for easy replacement of clamps of different shapes according to asphalt concrete samples of different shapes. It can adapt to samples of various shapes and sizes, whether square, round or irregular, and can be effectively fixed by changing the clamps to meet various test requirements.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An adjustment assembly for a tensile test of asphalt concrete, comprising a base (1), characterized in that: A test bench (2) is fixedly connected to the upper part of the base (1). A tensioning assembly (3) is provided on the upper part of the test bench (2). The tensioning assembly (3) is used to stretch asphalt concrete. A mounting plate (5) is fixedly connected to the upper part of the tensioning assembly (3). An electric push rod (6) is fixedly connected to the outside of the mounting plate (5). A moving block (7) is fixedly connected to the output end of the electric push rod (6). Adjusting plates (8) are rotatably connected to both sides of the outside of the moving block (7). The mounting plate (5) is fixedly connected to both sides of the inside. A fixed rod (10) is fixedly connected to each of the two fixed rods (10), and a slider (11) is slidably connected to the outside of each of the two adjusting plates (8). The other ends of the two adjusting plates (8) are rotatably connected to the outside of the two sliders (11). A connecting plate (12) is fixedly connected to the outside of each of the two sliders (11). An installation block (13) is fixedly connected to the outside of each of the two connecting plates (12). An installation column (14) is inserted into the inside of each of the two installation blocks (13). A clamping plate (15) is fixedly connected to the bottom of each of the two installation columns (14).
2. The adjustment component for a tensile test of asphalt concrete according to claim 1, characterized in that: Both mounting blocks (13) are fixedly connected to mounting tubes (16), and sliding blocks (17) are slidably connected inside the mounting tubes (16). A pull ring (18) is fixedly connected to the lower part of the sliding block (17), and a plug rod (21) is fixedly connected to the outside of the sliding block (17). A telescopic rod (19) is fixedly connected inside the mounting tubes (16), and the top of the telescopic rod (19) is fixedly connected to the outside of the sliding block (17). A spring (20) is sleeved on the outside of the telescopic rod (19).
3. The adjustment component for a tensile test of asphalt concrete according to claim 1, characterized in that: The tensile assembly (3) includes a dual-head motor (301), which is fixedly connected to the upper middle part of the test bench (2). Each output end of the dual-head motor (301) is fixedly connected to a lead screw (302). Both lead screws (302) are threadedly connected to guide blocks (303), and limit blocks (304) are fixedly connected to the outside of the guide blocks (303).
4. The adjustment component for a tensile test of asphalt concrete according to claim 1, characterized in that: The mounting plate (5) has first through holes (9) on both sides inside, and the two fixing rods (10) are fixedly connected inside the two first through holes (9).
5. The adjustment component for a tensile test of asphalt concrete according to claim 2, characterized in that: The mounting tube (16) has a second through hole (22) on the right side inside, and the insertion rod (21) is slidably connected inside the second through hole (22).
6. The adjustment component for a tensile test of asphalt concrete according to claim 2, characterized in that: The mounting post (14) has an insertion hole (23) inside, and the insertion rod (21) is inserted into the insertion hole (23).
7. The adjustment component for a tensile test of asphalt concrete according to claim 2, characterized in that: The mounting tube (16) has a third through hole (24) inside, and the pull ring (18) is slidably connected inside the third through hole (24).
8. The adjustment component for a tensile test of asphalt concrete according to claim 3, characterized in that: The test bench (2) has limit grooves (4) on both sides inside, and the two limit blocks (304) are slidably connected inside the two limit grooves (4).