Asphalt mixture Marshall stability testing device

Abstract

The utility model relates to the technical field of road test detection instruments, and discloses an asphalt mixture Marshall stability testing device which comprises a rack, the right side of the top wall of the rack is fixedly connected with a machine body, the right side in the rack is fixedly connected with a motor, and the output end of the motor is fixedly connected with a rotating shaft. And first bevel gears are fixedly connected to the left end and the right end of the outer wall of the rotating shaft correspondingly, second bevel gears are connected to the top walls of the first bevel gears in an engaged mode, threaded rods are fixedly connected to the middles of the top walls of the second bevel gears, and top plates are installed at the top ends of the two threaded rods correspondingly. According to the utility model, the threaded rod is rotated to drive the threaded block to move upwards along the threaded rod, so that the lower clamping block is close to the upper clamping block, and when the clamping blocks are close to the test piece, the rubber block is pressed, and the spring I is compressed to generate elastic force, so that the rubber block is firmly propped against the test piece, and the test piece is prevented from moving or shaking during testing; the adaptability of the device to shapes and sizes of different test pieces is improved.

Description

Technical Field

[0001] This utility model relates to the field of road testing and inspection instruments, and in particular to a Marshall stability testing device for asphalt mixtures. Background Technology

[0002] The Marshall stability test device for asphalt mixtures is a specialized instrument used to determine the ability of asphalt mixtures to resist failure under certain temperature and loading rate conditions, as well as the vertical deformation of the specimen at failure. By simulating the stress conditions of asphalt pavement under vehicle loads, it quantitatively evaluates the performance of asphalt mixtures, providing key technical parameters and basis for mix design, quality control, and road engineering design and construction of asphalt mixtures.

[0003] A search revealed Chinese patent publication number CN218272318U, which discloses a fully automatic Marshall stabilizer, including a chassis. A control panel is provided on one longitudinal side of the chassis, and a display screen is provided on one side of the control panel. A lifting platform is provided in the middle of the upper part of the chassis, and a pressure support is provided on the upper part of the lifting platform. Support columns are provided on both sides of the upper part of the chassis on the lateral side of the lifting platform. A crossbeam is provided between the support columns above the pressure support, and a pressure sensor is provided at the bottom of the crossbeam. The beneficial effects of this utility model are: the utility model has a reasonable design, stable structure, simple and convenient operation, and strong practicality; during normal use and testing, it can make the pressure support rise and fall smoothly, ensuring the accuracy of the test results; after the test, it can drive the upper support to rise, separating the upper and lower supports, which is convenient for the sample to be removed after the test. At the same time, it can also avoid damage to the upper and lower supports when using wrenches or other tools to separate the upper and lower supports, reducing the labor intensity of the operator, and is suitable for promotion. However, in actual engineering, the gradation and particle size range of asphalt mixtures are relatively wide, while the testing device usually uses standard-sized specimen molds. For some mixtures with larger particle sizes or special gradations, if the specimen clamp is not designed reasonably, it cannot well adapt to specimens with different sizes or slightly different shapes. For example, uneven clamping force of the clamp on the specimen will cause excessive local stress on the specimen during the test, resulting in abnormal specimen failure mode and affecting the authenticity of the test results. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a Marshall stability testing device for asphalt mixtures, which aims to improve the problem that the existing technology cannot well adapt to specimens of different sizes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an asphalt mixture Marshall stability testing device, comprising a frame, an organism fixedly connected to the right side of the top wall of the frame, a motor fixedly connected to the right side of the inside of the frame, a rotating shaft fixedly connected to the output end of the motor, bevel gears one fixedly connected to the left and right ends of the outer wall of the rotating shaft, bevel gear two meshing with the top wall of bevel gear one, a threaded rod fixedly connected to the middle of the top wall of bevel gear two, a top plate installed at the top of each of the two threaded rods, threaded blocks threadedly connected to the lower middle part of the outer wall of each of the two threaded rods, a detector fixedly connected to the middle of the bottom wall of the top plate, clamping blocks fixedly connected to the middle of the top wall of the threaded blocks and the middle of the bottom wall of the detector, multiple square grooves equally spaced on adjacent sides of the outer walls of the two clamping blocks, a spring one fixedly connected to the inner wall of the square groove, a rubber block fixedly connected to the end of the spring one, the rubber block slidingly connected to the square groove, and a shock-absorbing mechanism provided at the bottom of the frame to ensure stable operation of the frame.

[0006] The above technical solution involves placing the asphalt mixture specimen between two clamping blocks, starting the motor, which drives the rotating shaft to rotate. The rotating shaft drives the first bevel gear at both ends to rotate, which in turn drives the second bevel gear to rotate. The second bevel gear drives the threaded rod to rotate, causing the threaded block to move upward on the threaded rod. The threaded block causes the lower clamping block to move upward and approach the upper clamping block. When the clamping block approaches the specimen, the rubber block is compressed, and the first spring is compressed. The elastic force generated by the first spring makes the rubber block press tightly against the specimen, preventing the specimen from moving or shaking during the test. This method can adapt to specimens of different shapes and sizes, improves the versatility of the device, and ensures the accuracy of the test results.

[0007] As a further description of the above technical solution:

[0008] The shock absorption mechanism includes circular plates, and multiple circular plates are fixedly connected to the four corners of the bottom wall of the frame. Connecting blocks 1 are fixedly connected to the four sides of the bottom wall of each circular plate. Connecting blocks 2 are rotatably connected to the inner side of the outer wall of each connecting block 1. Telescopic rod 1 is fixedly connected to the bottom wall of each connecting block 2. Spring 2 is provided on the outer wall of each telescopic rod 1. Connecting block 3 is fixedly connected to the bottom wall of each telescopic rod 1. Connecting block 4 is rotatably connected to the outer wall of each connecting block 3. A base plate is fixedly connected to the bottom wall of multiple connecting blocks 4. Telescopic rod 2 is fixedly connected to the middle of the bottom wall of each circular plate. Telescopic rod 2 is fixedly connected to the middle of the top wall of the base plate.

[0009] Through the above technical solution: when external vibration is transmitted to the frame, the force is transmitted to the circular plate through the frame. Connecting block 1 around the circular plate drives connecting block 2 to rotate, causing telescopic rod 1 to extend and retract. Telescopic rod 1 compresses the outer spring 2, causing connecting block 3 at the bottom of telescopic rod 1 to rotate within connecting block 4. At the same time, telescopic rod 2 below the circular plate also extends and retracts, thereby further stabilizing and assisting in vibration reduction. Finally, through the buffering effect of spring 2 and the stabilizing synergy of telescopic rod 1 and telescopic rod 2, the testing device is ensured to operate in a relatively stable state, reducing the impact of external vibration on the test results.

[0010] As a further description of the above technical solution:

[0011] A display screen is installed on the rear left side of the top wall of the machine body, and multiple buttons are installed at equal intervals on the right side of the top wall of the machine body.

[0012] The above technical solution allows the display screen to show various data and information during the testing process, enabling operators to intuitively understand the testing situation and obtain the final data. The buttons are used to control the testing process and to set and adjust other functions of the equipment.

[0013] As a further description of the above technical solution:

[0014] A switch is installed on the right side of the top wall of the machine body, and an indicator light is installed on the right side of the top wall of the machine body.

[0015] The above technical solution uses switches to control the power supply to the entire testing device, and indicator lights to indicate the working status of the equipment.

[0016] As a further description of the above technical solution:

[0017] A paper output hole is provided on the middle left side of the top wall of the machine body, and a data sheet is provided inside the paper output hole.

[0018] With the above technical solution: the paper output hole is the channel for outputting the data sheet, which records the detailed test data and results.

[0019] As a further description of the above technical solution:

[0020] A slot is provided on the right side of the outer wall of the frame, and a nameplate is provided inside the slot. The slot engages with the nameplate.

[0021] The above technical solution uses a slot to fix a nameplate, which contains important information about the equipment.

[0022] As a further description of the above technical solution:

[0023] A charging port is provided on the right side of the outer wall of the frame, and a baffle is provided on the outer wall of the charging port, which engages with the baffle.

[0024] The above technical solution provides a power input interface for the device's built-in battery, while the baffle mainly serves to protect the charging port and prevent dust and debris from entering it.

[0025] As a further description of the above technical solution:

[0026] The bottom wall of the base plate has a circular groove, and the inner top wall of the circular groove is fitted with an anti-slip pad.

[0027] The above technical solution allows for the use of a circular groove to accommodate an anti-slip pad, which in turn helps to better secure components, ensuring the positional accuracy of relevant components during testing and thus improving the reliability of test results.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the asphalt mixture specimen is placed between two clamping blocks. The motor is started, and the motor drives the rotating shaft to rotate. The rotating shaft is driven by bevel gear one and bevel gear two, which causes the threaded rod to rotate. The rotation of the threaded rod causes the threaded block to move upward along it, thereby bringing the lower clamping block closer to the upper clamping block. When the clamping block approaches the specimen, the rubber block is compressed, and the spring is compressed to generate elastic force, ensuring that the rubber block firmly holds the specimen and prevents the specimen from moving or shaking during the test. This improves the adaptability of the device to different specimen shapes and sizes and ensures the accuracy of the test.

[0030] 2. In this utility model, when vibration is transmitted to the frame, the force is transmitted through the frame and the circular plate to the connecting block one and the connecting block two, causing the telescopic rod one and the telescopic rod two to extend and retract. The telescopic rod one compresses the spring two, and through the rotation of the connecting block three and the connecting block four, the testing device is stabilized and vibration is reduced, ensuring that the testing device works in a stable state and reducing the impact of external vibration on the test results. Attached Figure Description

[0031] Figure 1 This is a front view of an asphalt mixture Marshall stability testing device proposed in this utility model;

[0032] Figure 2 This is a perspective view of a Marshall stability testing device for asphalt mixtures proposed in this utility model;

[0033] Figure 3 This is a partial exploded view of the Marshall stability testing device for asphalt mixtures proposed in this utility model;

[0034] Figure 4This is a partial structural exploded view of the Marshall stability testing device for asphalt mixtures proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the vibration damping mechanism of an asphalt mixture Marshall stability testing device proposed in this utility model.

[0036] Legend:

[0037] 1. Frame; 2. Shock Absorption Mechanism; 201. Circular Plate; 202. Connecting Block 1; 203. Connecting Block 2; 204. Telescopic Rod 1; 205. Spring 2; 206. Connecting Block 3; 207. Connecting Block 4; 208. Base Plate; 209. Telescopic Rod 2; 3. Machine Body; 4. Motor; 5. Shaft; 6. Bevel Gear 1; 7. Bevel Gear 2; 8. Threaded Rod; 9. Top Plate; 10. Threaded Block; 11. Detector; 12. Clamping Block; 13. Square Slot; 14. Spring 1; 15. Rubber Block; 16. Display Screen; 17. Button; 18. Switch; 19. Indicator Light; 20. Paper Output Hole; 21. Data Sheet; 22. Card Slot; 23. Nameplate; 24. Charging Port; 25. Baffle; 26. Circular Slot; 27. Anti-slip Pad. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0039] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of an asphalt mixture Marshall stability testing device, comprising a frame 1, an organ 3 (model LWD-5) fixedly connected to the right side of the top wall of the frame 1, a motor 4 fixedly connected to the right side of the interior of the frame 1, a rotating shaft 5 fixedly connected to the output end of the motor 4, the motor 4 driving the rotating shaft 5 to rotate, and bevel gears 6 fixedly connected to the left and right ends of the outer wall of the rotating shaft 5, the rotating shaft 5 driving the bevel gears 6 at both ends to rotate, and bevel gears 2 meshing with the top walls of the bevel gears 6. 7. Bevel gear 6 drives bevel gear 7 to rotate. A threaded rod 8 is fixedly connected to the middle of the top wall of bevel gear 7. Bevel gear 7 drives the threaded rod 8 to rotate. Top plates 9 are installed at the top of both threaded rods 8. Threaded blocks 10 are threadedly connected to the lower middle part of the outer wall of both threaded rods 8. A detector 11 is fixedly connected to the middle of the bottom wall of top plate 9. Clamping blocks 12 are fixedly connected to the middle of the top wall of threaded block 10 and the middle of the bottom wall of detector 11. Threaded block 10 drives the lower clamping block 12 to move upward and closer to the upper clamping block 12. Multiple square grooves 13 are equidistantly provided on the adjacent sides of the outer walls of the two clamping blocks 12. A spring 14 is fixedly connected to the inner wall of the square groove 13. A rubber block 15 is fixedly connected to the end of the spring 14. The rubber block 15 is slidably connected to the square groove 13. When the spring 14 is compressed, the elastic force generated by the spring 14 makes the rubber block 15 press tightly against the specimen. A shock-absorbing mechanism 2 is provided at the bottom of the frame 1 to ensure the stable operation of the frame 1. A display screen 16 is installed at the rear left side of the top wall of the machine body 3. The display screen 16 is used to display various data and information during the test process, so that the operator can intuitively understand the test situation and obtain the final data. Multiple buttons 17 are equidistantly installed on the right side of the top wall of the machine body 3. The buttons 17 are used to control the test process and to set and adjust some other functions of the equipment. A switch 18 is installed at the front right end of the top wall of the machine body 3. The switch 18 is used to control the power supply of the entire test device. An indicator light 19 is installed at the front right end of the top wall of the machine body 3 to indicate the working status of the equipment.

[0040] Specifically, the asphalt mixture specimen is placed between two clamping blocks 12. The motor 4 is started, and the motor 4 drives the rotating shaft 5 to rotate. The rotating shaft 5 transmits power through the first bevel gear 6 at both ends, which in turn causes the second bevel gear 7 to rotate. The second bevel gear 7 drives the threaded rod 8 to rotate. The rotation of the threaded rod 8 causes the threaded block 10 to rise along it. The rise of the threaded block 10 pushes the lower clamping block 12 to move upward until it is in close contact with the upper clamping block 12. At this time, the rubber block 15 is compressed, and the first spring 14 is compressed. The elastic force generated by the first spring 14 ensures that the rubber block 15 is tightly pressed against the specimen, preventing the specimen from being damaged during testing. The device is designed to accommodate specimens of different shapes and sizes, thus enhancing its versatility and ensuring the accuracy of test results. A shock-absorbing mechanism 2 is installed at the bottom of the frame 1 to ensure the stable operation of the frame 1. The display screen 16 is used to display various data and information during the test process, allowing operators to intuitively understand the test situation and obtain the final data. The button 17 is used to control the test process and to set and adjust some other functions of the equipment. The switch 18 controls the power supply of the entire test device. The indicator light 19 is used to indicate the working status of the equipment.

[0041] Reference Figure 2 and Figure 5 The shock absorption mechanism 2 includes circular plates 201. Multiple circular plates 201 are fixedly connected to the four corners of the bottom wall of the frame 1. Connecting blocks 1 202 are fixedly connected to the four sides of the bottom wall of each circular plate 201. Connecting blocks 2 203 are rotatably connected to the inner side of the outer wall of connecting blocks 1 202. Connecting blocks 1 202 around the circular plate 201 drive connecting blocks 2 203 to rotate. Telescopic rods 1 204 are fixedly connected to the bottom wall of connecting blocks 2 203. Springs 2 205 are provided on the outer wall of telescopic rods 1 204. Telescopic rods 1 204 compress the outer springs 2 205. Connecting blocks 3 206 are fixedly connected to the bottom wall of telescopic rods 1 204. Connecting blocks 3 206 are rotatably connected to the outer wall of connecting blocks 3 206. Connecting block 4 207, connecting block 3 206 at the bottom of telescopic rod 1 204 rotates within connecting block 4 207, and base plate 208 is fixedly connected to the bottom wall of multiple connecting blocks 4 207. Telescopic rod 209 is fixedly connected to the middle of the bottom wall of circular plate 201. Telescopic rod 209 is fixedly connected to the middle of the top wall of base plate 208. Telescopic rod 209 further stabilizes and assists in shock absorption. Circular groove 26 is opened on the bottom wall of base plate 208. Circular groove 26 is used to accommodate anti-slip pad 27. Anti-slip pad 27 is installed on the inner top wall of circular groove 26. Anti-slip pad 27 can better fix the components, ensure the positional accuracy of relevant components during the test, and thus improve the reliability of the test results.

[0042] Specifically, when external vibration is transmitted to the frame 1, the force is transmitted to the circular plate 201 through the frame 1. The connecting block 202 around the circular plate 201 drives the connecting block 203 to rotate, causing the telescopic rod 204 to extend and retract. The telescopic rod 204 compresses the outer spring 205, causing the connecting block 206 at the bottom of the telescopic rod 204 to rotate within the connecting block 207. At the same time, the telescopic rod 209 below the circular plate 201 also extends and retracts, thereby playing a further stabilizing and auxiliary shock absorption role. Finally, through the buffering effect of the spring 205 and the stabilizing synergy of the telescopic rods 204 and 209, the testing device is ensured to operate in a relatively stable state, reducing the impact of external vibration on the test results. The circular groove 26 is used to accommodate the anti-slip pad 27, which can better fix the components and ensure the positional accuracy of the relevant components during the test, thereby improving the reliability of the test results.

[0043] Reference Figure 2 and Figure 3 A paper output hole 20 is provided on the middle left side of the top wall of the machine body 3. The paper output hole 20 is the channel for outputting the data sheet 21. The data sheet 21 is set inside the paper output hole 20. The data sheet 21 records the detailed test data and results. A slot 22 is provided on the right side of the outer wall of the frame 1. A nameplate 23 is set inside the slot 22. The slot 22 is used to fix the nameplate 23. The slot 22 and the nameplate 23 are engaged. The nameplate 23 is marked with important information of the equipment. A charging port 24 is provided on the right side of the outer wall of the frame 1. The charging port 24 is the interface for providing power input to the built-in battery of the equipment. A baffle 25 is provided on the outer wall of the charging port 24. The charging port 24 is engaged with the baffle 25. The baffle 25 mainly serves to protect the charging port 24 and prevent dust and debris from entering the charging port 24.

[0044] Specifically, the paper output hole 20 is the channel for outputting the data sheet 21, which records detailed test data and results. The card slot 22 is used to fix the nameplate 23, which is marked with important information about the device. The charging port 24 is the interface for providing power input to the device's built-in battery. The baffle 25 mainly serves to protect the charging port 24 and prevent dust and debris from entering it.

[0045] Working principle: Before testing, the asphalt mixture specimen is placed between two clamping blocks 12. The motor 4 is started, and the motor 4 drives the rotating shaft 5 to rotate. The rotating shaft 5 drives the bevel gear 6 at both ends to rotate. The bevel gear 6 drives the bevel gear 7 to rotate. The bevel gear 7 drives the threaded rod 8 to rotate. The rotation of the threaded rod 8 causes the threaded block 10 to move upward on the threaded rod 8. The threaded block 10 drives the lower clamping block 12 to move upward and approach the upper clamping block 12. When the clamping block 12 approaches the specimen, the rubber block 15 is squeezed, and the spring 14 is compressed. The elastic force generated by the spring 14 makes the rubber block 15 press tightly against the specimen, preventing the specimen from moving or shaking during the test. It can adapt to specimens of different shapes and sizes, improves the versatility of the device, and ensures the accuracy of the test results.

[0046] When external vibrations are transmitted to the frame 1, the force is transmitted through the frame 1 to the circular plate 201. The connecting block 202 around the circular plate 201 drives the connecting block 203 to rotate, causing the telescopic rod 204 to extend and retract. The telescopic rod 204 compresses the outer spring 205, causing the connecting block 206 at the bottom of the telescopic rod 204 to rotate in the connecting block 207. The telescopic rod 209 under the circular plate 201 also extends and retracts accordingly, which plays a further stabilizing and auxiliary vibration reduction role. Finally, through the buffering effect of the spring 205 and the stabilizing synergy of the telescopic rod 204 and the telescopic rod 209, the testing device is ensured to work in a relatively stable state, reducing the interference of external vibrations on the test results.

[0047] 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. A Marshall stability testing device for asphalt mixtures, comprising a frame (1), characterized in that: An organism (3) is fixedly connected to the right side of the top wall of the frame (1). A motor (4) is fixedly connected to the right side of the inside of the frame (1). A rotating shaft (5) is fixedly connected to the output end of the motor (4). A bevel gear (6) is fixedly connected to the left and right ends of the outer wall of the rotating shaft (5). A bevel gear (7) is meshed with the top wall of the bevel gear (6). A threaded rod (8) is fixedly connected to the middle of the top wall of the bevel gear (7). A top plate (9) is installed at the top of each of the two threaded rods (8). A threaded block (10) is threadedly connected to the lower middle part of the outer wall of each of the two threaded rods (8). The top plate (9) A detector (11) is fixedly connected to the middle of the bottom wall of the 9). A clamping block (12) is fixedly connected to the middle of the top wall of the threaded block (10) and the middle of the bottom wall of the detector (11). Multiple square grooves (13) are equally spaced on the adjacent side of the outer wall of the two clamping blocks (12). A spring (14) is fixedly connected to the inner wall of the square groove (13). A rubber block (15) is fixedly connected to the end of the spring (14). The rubber block (15) is slidably connected to the square groove (13). A shock-absorbing mechanism (2) is provided at the bottom of the frame (1). The shock-absorbing mechanism (2) is used to ensure the stable operation of the frame (1).

2. The Marshall stability testing device for asphalt mixtures according to claim 1, characterized in that: The shock absorption mechanism (2) includes a circular plate (201). Multiple circular plates (201) are fixedly connected to the four corners of the bottom wall of the frame (1). Connecting blocks 1 (202) are fixedly connected to the bottom wall of each circular plate (201). Connecting blocks 2 (203) are rotatably connected to the inner side of the outer wall of the connecting blocks 1 (202). Telescopic rod 1 (204) is fixedly connected to the bottom wall of the connecting blocks 2 (203). The outer wall of the telescopic rod 1 (204) is provided with There is a second spring (205), and a third connecting block (206) is fixedly connected to the bottom wall of the first telescopic rod (204). A fourth connecting block (207) is rotatably connected to the outer wall of the third connecting block (206). A base plate (208) is fixedly connected to the bottom wall of each of the fourth connecting blocks (207). A second telescopic rod (209) is fixedly connected to the middle of the bottom wall of the circular plate (201). The second telescopic rod (209) is fixedly connected to the middle of the top wall of the base plate (208).

3. The Marshall stability testing device for asphalt mixtures according to claim 1, characterized in that: A display screen (16) is installed on the left rear end of the top wall of the body (3), and multiple buttons (17) are installed at equal intervals on the right side of the top wall of the body (3).

4. The Marshall stability testing device for asphalt mixtures according to claim 1, characterized in that: A switch (18) is installed on the right side of the front of the top wall of the body (3), and an indicator light (19) is installed on the right side of the front of the top wall of the body (3).

5. The Marshall stability testing device for asphalt mixtures according to claim 1, characterized in that: The top wall of the machine body (3) has a paper output hole (20) in the middle of the left side, and a data sheet (21) is provided inside the paper output hole (20).

6. The Marshall stability testing device for asphalt mixtures according to claim 1, characterized in that: The outer wall of the frame (1) has a slot (22) on the right side, and a nameplate (23) is provided inside the slot (22). The slot (22) engages with the nameplate (23).

7. The Marshall stability testing device for asphalt mixtures according to claim 1, characterized in that: A charging port (24) is provided on the right side of the outer wall of the frame (1). A baffle (25) is provided on the outer wall of the charging port (24), and the charging port (24) engages with the baffle (25).

8. The Marshall stability testing device for asphalt mixtures according to claim 2, characterized in that: The bottom wall of the base plate (208) is provided with a circular groove (26), and the inner top wall of the circular groove (26) is provided with an anti-slip pad (27).

Images