An asphalt mixture rut specimen molding machine

Abstract

The application discloses a kind of asphalt mixture rut specimen forming machine, it is related to asphalt forming technical field, it includes carrying box body, carrying box body top is equipped with support frame by bolt, and support frame top is equipped with hydraulic cylinder, and the movable end below hydraulic cylinder is equipped with rolling wheel by elastic element;Carrying box body top is symmetrically equipped with two groups of guide rails, and the upper end of guide rail is slidably connected with support plate, and the bottom of support plate is movably connected with transmission rod, and the side surface of another end transmission rod is drivingly connected with driving assembly, and driving mechanism drives transmission rod to drive support plate reciprocating sliding along guide rail;Support plate middle part is fixedly installed with step motor, and the output end of step motor is connected with specimen plate, and the upper end of specimen plate is clamped with mould disc, and the upper side of mould disc is provided with scraper, and the lower side of scraper is connected with overflow cleaning mechanism, the present application introduces sliding scraper, elastic rolling wheel and adjustable specimen plate, improve the stability and working efficiency of compaction process.

Description

Technical Field

[0001] This invention relates to the field of asphalt molding technology, and more particularly to an asphalt mixture rut sample molding machine. Background Technology

[0002] In the field of road engineering, the performance of asphalt mixtures directly affects the durability and safety of pavement. Rutting tests are widely used as a key testing method to scientifically evaluate the high-temperature stability of asphalt mixtures. The quality of rutting sample preparation directly affects the accuracy and repeatability of test results. A search revealed an existing patent (publication number CN223611223U) that discloses an asphalt mixture rutting sample forming machine. By setting up a cleaning scraper, when the rocker arm is shaken, the cleaning scraper moves along the arc direction of the lower surface of the roller under the support of the connecting rod, which ensures the cleaning of the asphalt mixture adhering to the lower surface of the roller. In addition, the rocker arm is wrapped with heat insulation material to prevent workers from being burned, improves cleaning efficiency, and reduces the test completion time. Its design is reasonable, but there are still some shortcomings in the structural design. During the feeding and compaction process of existing equipment, some asphalt mixture tends to overflow from the edge of the mold frame. After cooling, it adheres to the mold surface, which not only affects the appearance but may also cause uneven stress during subsequent compaction, thus affecting the uniformity of sample density. Currently, manual scraping is often used to remove this material, which is time-consuming, labor-intensive, and poses safety hazards. Secondly, traditional rollers mostly use a rigid connection method. During the contact process with the mold frame, especially at the beginning and end stages, if the position control is slightly off, it is very easy to cause the mold edges and corners to be bumped or deformed. Long-term use will reduce the accuracy of the mold and shorten its service life. At the same time, the mold frames in existing equipment are mostly fixed installations. Each time the sample is changed, manual disassembly, cleaning, and reversal are required, which seriously affects the test progress. Summary of the Invention

[0003] The asphalt mixture rut sample forming machine proposed in this invention solves the problems of difficult overflow cleaning, easy damage to the mold due to rigid contact of the roller, fixed and non-adjustable mold frame, and low operating efficiency of existing asphalt mixture rut sample forming machines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An asphalt mixture rutting sample forming machine includes a loading box, a support frame is bolted to the top of the loading box, a hydraulic cylinder is mounted on the top of the support frame, and a rolling wheel is mounted below the movable end of the hydraulic cylinder via an elastic element. Two sets of guide rails are symmetrically installed on the top of the cargo box, and a support plate is slidably connected to the upper end of the guide rail. A transmission rod is movably connected to the bottom of the support plate, and the other end of the transmission rod is connected to the drive assembly. The drive mechanism drives the transmission rod to move the support plate back and forth along the guide rail. A stepper motor is fixedly installed in the middle of the support plate, and a sample plate is connected to the output end of the stepper motor. A mold plate is clamped at the upper end of the sample plate, and a scraper is provided above the mold plate. An overflow cleaning mechanism is connected below the scraper.

[0005] Preferably, a controller is fixedly installed at the front end of the support frame, and slide rails are provided on both sides inside the support frame.

[0006] Preferably, the slide rail is provided with matching sliders, and the sliders are fixedly connected to a crossbar, and the roller is movably connected to the outside of the crossbar.

[0007] Preferably, an installation cylinder is sleeved in the middle of the crossbar, and a spring buffer is installed inside the installation cylinder, and the movable end of the hydraulic cylinder is connected to the top end of the spring buffer inside the installation cylinder.

[0008] Preferably, the bottom of the support plate is equipped with multiple sets of pulleys adapted to the guide rail, and the support plate is slidably connected to the outside of the guide rail via the pulleys.

[0009] Preferably, the drive assembly includes a drive motor, a reducer, and a transmission plate. The drive motor is fixedly installed inside the cargo box. The reducer is connected to the side end of the drive motor, and the output end of the reducer extends to the outside of the cargo box. The transmission plate is bolted to the output end of the reducer, and a transmission rod is movably connected to the outside of the transmission plate at the other end.

[0010] Preferably, the sample plate and the support plate have through threaded holes at their side ends, and the threaded holes are fitted with fixing bolts for limiting their connection.

[0011] Preferably, the sample plate has a U-shaped structure, and screw holes are provided on both sides of one end of the sample plate. A knob screw is movably connected inside the screw hole, and a clamp is embedded in the side end of the knob screw for movable connection.

[0012] Preferably, the overflow cleaning mechanism includes a channel, a threaded rod, a driven right-angle gear transmission box, a movable rod, a servo motor, a movable block, and a driving right-angle gear transmission box. Channels are provided on both sides of the sample plate. A threaded rod is provided inside the channel, and a movable block matching the channel is provided outside the threaded rod. The top of the movable block is connected to the scraper.

[0013] Preferably, a driven right-angle gear transmission box is fixedly installed inside the channel at one end, a movable rod is connected between the driven right-angle gear transmission boxes at both ends, and an active right-angle gear transmission box is installed in the middle of the movable rod. A servo motor is meshed with the side of the active right-angle gear transmission box, and the servo motor is fixedly installed inside the sample plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The asphalt mixture rutting sample forming machine has an overflow cleaning mechanism on both sides of the sample plate, consisting of a servo motor, a right-angle gear transmission box, threaded rods, movable blocks, and scrapers. The servo motor drives the threaded rods on both sides to rotate synchronously through gear transmission, which drives the scraper to move horizontally back and forth along the upper surface of the mold plate. This can scrape off the asphalt mixture overflowing during the rolling process. At the same time, in conjunction with the collection box on the side of the sample plate, the overflow can be collected and cleaned up in a centralized manner.

[0015] 2. The roller is slidably connected to the support frame via a crossbar, slider, and a spring buffer is installed between the moving end of the hydraulic cylinder and the crossbar to form an elastic compaction structure. When the hydraulic cylinder drives the roller to press down, the spring buffer can buffer the compaction impact force, avoiding mold deformation or local breakage of the asphalt mixture caused by sudden pressure changes in the traditional rigid compaction structure. At the same time, the elastic compensation effect of the spring buffer can make the roller fit tightly against the surface of the mixture, ensuring uniform compaction pressure distribution and effectively extending the service life of the mold.

[0016] 3. The sample plate is detachably connected to the support plate by fixing bolts, and the support plate is equipped with a stepper motor. After the fixing bolts are loosened, the stepper motor can drive the sample plate and the mold plate to rotate and adjust the angle. Compared with the existing technology where the mold frame is fixed and cannot be adjusted, the present invention can adjust the rolling angle of the mold plate according to the test requirements, realize multi-directional uniform rolling, and significantly improve the forming quality of the rut sample, meeting the requirements of different test standards for the sample. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure from another perspective of the present invention.

[0019] Figure 3 This is a schematic diagram of the exploded structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the cargo box and mold plate of the present invention.

[0021] Figure 5 This is a schematic diagram of the overflow cleaning mechanism of the present invention.

[0022] Figure 6This is a schematic diagram of the driving component structure of the present invention.

[0023] The following are the labeling elements in the diagram: 1. Loading box; 2. Support frame; 3. Hydraulic cylinder; 4. Roller; 5. Guide rail; 6. Support plate; 7. Transmission rod; 8. Stepper motor; 9. Sample plate; 10. Mold plate; 11. Scraper; 12. Controller; 13. Slide rail; 14. Slider; 15. Crossbar; 16. Mounting cylinder; 17. Spring buffer; 18. Pulley; 19. Drive motor; 20. Reducer; 21. Transmission plate; 22. Threaded hole; 23. Fixing bolt; 24. Screw hole; 25. Knob screw; 26. Clamping plate; 27. Channel; 28. Threaded rod; 29. ​​Driven right-angle gear transmission box; 30. Movable rod; 31. Servo motor; 32. Movable block; 33. Driven right-angle gear transmission box. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Example 1 Reference Figures 1-6 This invention provides a technical solution: an asphalt mixture rutting sample forming machine, comprising a loading box 1, a support frame 2 bolted to the top of the loading box 1, a hydraulic cylinder 3 mounted on the top of the support frame 2, and a rolling wheel 4 mounted below the movable end of the hydraulic cylinder 3 via an elastic element; two sets of guide rails 5 symmetrically mounted on the top of the loading box 1, a support plate 6 slidably connected to the upper end of the guide rails 5, a transmission rod 7 movably connected to the bottom of the support plate 6, and the other end of the transmission rod 7 being connected to the drive assembly for transmission; the drive mechanism drives the transmission rod 7 to drive the support plate 6 to slide back and forth along the guide rails 5; a stepper motor 8 is fixedly mounted in the middle of the support plate 6, and a sample plate 9 is connected to the output end of the stepper motor 8; a mold disk 10 for holding asphalt mixture is clamped at the upper end of the sample plate 9, and a scraper 11 is provided above the mold disk 10, with an overflow cleaning mechanism connected below the scraper 11.

[0026] Reference Figure 3 The support frame 2 is fixedly installed with a controller 12 at the front end, and the support frame 2 has slides 13 on both sides inside. The slides 13 are equipped with matching sliders 14, and the sliders 14 are fixedly connected with crossbars 15. The roller 4 is movably connected to the outside of the crossbar 15. The crossbar 15 is fitted with an installation cylinder 16 in the middle, and the installation cylinder 16 is equipped with a spring buffer 17. The movable end of the hydraulic cylinder 3 is connected to the top of the spring buffer 17 inside the installation cylinder 16.

[0027] Reference Figure 1 , Figure 5The sample plate 9 and the support plate 6 have through threaded holes 22 on their sides, and the threaded holes 22 are limited and connected with fixing bolts 23. The sample plate 9 has a U-shaped structure, and one end of the sample plate 9 has screw holes 24 on both sides. The screw holes 24 are movably connected with knob screws 25, and the knob screws 25 are movably connected with clamps 26 embedded in their sides.

[0028] In specific implementation, an asphalt mixture rutting sample forming machine, when the asphalt mixture heated to a specified temperature is poured into the mold plate 10, and the mold plate 10 is clamped and rotated for adjustment, firstly, the mold plate 10 is placed in the U-shaped groove of the sample plate 9, and the two side knob screws 25 are rotated to drive the clamping plate 26 to move inward until the clamping plate 26 is tightly attached to the side wall of the mold plate 10, thus achieving clamping and fixing of the mold plate 10. At the same time, the hydraulic cylinder 3 is activated, and the hydraulic cylinder 3 pushes the mounting cylinder 16 and the crossbar 15 to move downward along the slide 13, causing the rolling wheel 4 to fit against the surface of the asphalt mixture in the mold plate 10. The spring buffer 17 can buffer the impact force during the rolling process and prevent the asphalt mixture from being damaged by force. Uneven compaction can lead to damage, thus achieving pre-compression of the asphalt mixture within the mold disk 10. When it is necessary to rotate and adjust the mold disk 10, first rotate the fixing bolt 23 in the opposite direction to loosen the sample plate 9 from the support plate 6. Then, start the stepper motor 8 through the controller 12. The stepper motor 8 drives the sample plate 9 and the mold disk 10 to rotate slowly, adjusting the angle of the mold disk 10. After adjustment, the fixing bolt 23 passes through the threaded hole 22 to firmly connect the sample plate 9 to the support plate 6, ensuring that the sample plate 9 is stable and does not wobble during movement. Through the above operations, the mold disk 10 can be stably clamped and rotated, providing a guarantee for the uniform compaction and molding of the asphalt mixture and improving the quality of sample molding.

[0029] Example 2 Reference Figure 5 , Figure 6 This embodiment is an optimization based on the first embodiment. The overflow cleaning mechanism includes a channel 27, a threaded rod 28, a driven right-angle gear transmission box 29, a movable rod 30, a servo motor 31, a movable block 32, and a driving right-angle gear transmission box 33. Channels 27 are provided on both sides of the sample plate 9. The threaded rod 28 is provided inside the channel 27, and the movable block 32 that matches the channel 27 is provided on the outside of the threaded rod 28. The top of the movable block 32 is connected to the scraper 11.

[0030] Reference Figure 2 , Figure 5One end of the channel 27 has a driven right-angle gear transmission box 29 fixedly installed inside. The two ends of the driven right-angle gear transmission boxes 29 are connected by a movable rod 30. The middle of the movable rod 30 is equipped with a driving right-angle gear transmission box 33. The side of the driving right-angle gear transmission box 33 is meshed with a servo motor 31. The servo motor 31 is fixedly installed inside the sample plate 9. The other end of the sample plate 9 is clipped to a storage box. The scraped overflow can fall into the storage box for easy subsequent centralized cleaning.

[0031] In specific implementation, an asphalt mixture rutting sample forming machine, when cleaning the overflow of asphalt mixture in the mold plate 10, after the initial compaction of the asphalt mixture is completed, starts the servo motor 31 through the controller 12. The servo motor 31 drives the active right-angle gear transmission box 33 to rotate. The active right-angle gear transmission box 33 drives the movable rod 30 to rotate. The two ends of the movable rod 30 drive the threaded rod 28 in the two side channels 27 to rotate synchronously through the driven right-angle gear transmission box 29. When the threaded rod 28 rotates, the outer movable block 32 moves horizontally back and forth along the channel 27. The movable block 32 drives the top scraper 11 to move against the upper surface of the mold plate 10 to scrape off the asphalt mixture that overflowed from the mold plate 10 during the compaction process. The scraped overflow can fall into the collection box that is snapped into the side of the sample plate 9 for easy subsequent centralized cleaning. Through the above operation, the overflow residue is avoided from affecting the sample accuracy and equipment cleanliness, while improving cleaning efficiency and reducing the intensity of manual operation.

[0032] Example 3 Reference Figure 4 , Figure 6 This embodiment is an optimization based on embodiment two. Multiple sets of pulleys 18 adapted to guide rail 5 are installed at the bottom of the support plate 6, and the support plate 6 is slidably connected to the outside of guide rail 5 through the pulleys 18. The drive assembly includes a drive motor 19, a reducer 20, and a transmission plate 21. The drive motor 19 is fixedly installed inside the cargo box 1. The reducer 20 is connected to the side end of the drive motor 19, and the output end of the reducer 20 extends to the outside of the cargo box 1. The transmission plate 21 is installed at the output end of the reducer 20 by bolts, and the transmission rod 7 is movably connected to the outside of the other end of the transmission plate 21.

[0033] In specific implementation, an asphalt mixture rutting sample forming machine, when in use, first presets the equipment operating parameters via controller 12, including the compaction pressure of hydraulic cylinder 3, the speed of drive motor 19, the rotation angle of stepper motor 8, and the travel stroke of servo motor 31. Then, the heated and qualified asphalt mixture is evenly poured into mold plate 10, and the clamping and initial angle adjustment of mold plate 10 are completed according to the above steps. The drive motor 19 is started, and after speed adjustment via reducer 20, it drives transmission plate 21 to rotate. The transmission plate 21 pulls the support plate 6 through the transmission rod 7, and slides back and forth along the guide rail 5 with the cooperation of the pulley 18. At the same time, the roller 4 reciprocates and rolls the asphalt mixture in the mold plate 10 under the action of the hydraulic cylinder 3. After rolling, the overflow cleaning mechanism is started to clean the overflow, and then the equipment is turned off. The knob screw 25 is loosened to facilitate the removal of the mold plate 10 and the molded sample. Through the above operation, the various mechanisms of the equipment work together, making the operation convenient, the molding efficiency high, and the sample quality stable, which can meet the requirements of subsequent rutting tests.

[0034] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An asphalt mixture rutting sample forming machine, comprising a loading box (1), characterized in that, The top of the cargo box (1) is fitted with a support frame (2) by bolts, and a hydraulic cylinder (3) is fitted on the top of the support frame (2). A roller (4) is fitted below the movable end of the hydraulic cylinder (3) by an elastic element. The top of the cargo box (1) is symmetrically equipped with two sets of guide rails (5), and the upper end of the guide rail (5) is slidably connected to a support plate (6). The bottom of the support plate (6) is movably connected to a transmission rod (7), and the other end of the transmission rod (7) is connected to the drive assembly. The drive mechanism drives the transmission rod (7) to drive the support plate (6) to slide back and forth along the guide rail (5). A stepper motor (8) is fixedly installed in the middle of the support plate (6), and a sample plate (9) is connected to the output end of the stepper motor (8). A mold plate (10) is clamped at the upper end of the sample plate (9), and a scraper (11) is provided above the mold plate (10). An overflow cleaning mechanism is connected below the scraper (11).

2. The asphalt mixture rut sample forming machine according to claim 1, characterized in that, The support frame (2) is fixedly equipped with a controller (12) at the front end, and the support frame (2) has slides (13) on both sides inside.

3. The asphalt mixture rutting sample forming machine according to claim 2, characterized in that, The slide (13) is provided with matching sliders (14), and a crossbar (15) is fixedly connected between the sliders (14). The roller (4) is movably connected to the outside of the crossbar (15).

4. The asphalt mixture rutting sample forming machine according to claim 3, characterized in that, The crossbar (15) is fitted with an installation cylinder (16) in the middle, and a spring buffer (17) is installed inside the installation cylinder (16), and the movable end of the hydraulic cylinder (3) is connected to the top of the spring buffer (17) inside the installation cylinder (16).

5. The asphalt mixture rut sample forming machine according to claim 1, characterized in that, The bottom of the support plate (6) is equipped with multiple sets of pulleys (18) that are compatible with the guide rail (5), and the support plate (6) is slidably connected to the outside of the guide rail (5) through the pulleys (18).

6. The asphalt mixture rut sample forming machine according to claim 1, characterized in that, The drive assembly includes a drive motor (19), a reducer (20), and a transmission plate (21). The drive motor (19) is fixedly installed inside the cargo box (1). The reducer (20) is connected to the side of the drive motor (19). The output end of the reducer (20) extends to the outside of the cargo box (1). The transmission plate (21) is installed on the output end of the reducer (20) by bolts. A transmission rod (7) is movably connected to the outside of the transmission plate (21) at the other end.

7. The asphalt mixture rut sample forming machine according to claim 1, characterized in that, The sample plate (9) and the support plate (6) have through threaded holes (22) on their sides, and the threaded holes (22) are connected to a fixing bolt (23).

8. The asphalt mixture rut sample forming machine according to claim 1, characterized in that, The sample plate (9) has a U-shaped structure, and screw holes (24) are provided on both sides of the side end of the sample plate (9). A knob screw (25) is movably connected inside the screw hole (24), and a clamping plate (26) is embedded in the side end of the knob screw (25) for movable connection.

9. The asphalt mixture rutting sample forming machine according to claim 1, characterized in that, The overflow cleaning mechanism includes a channel (27), a threaded rod (28), a driven right-angle gear transmission box (29), a movable rod (30), a servo motor (31), a movable block (32), and an active right-angle gear transmission box (33). The sample plate (9) has channels (27) on both sides. The channel (27) is provided with a threaded rod (28) inside. The movable block (32) that matches the channel (27) is provided on the outside of the threaded rod (28). The top of the movable block (32) is connected to the scraper (11).

10. The asphalt mixture rutting sample forming machine according to claim 9, characterized in that, A driven right-angle gear transmission box (29) is fixedly installed inside the channel (27) at one end. A movable rod (30) is connected between the driven right-angle gear transmission boxes (29) at both ends. An active right-angle gear transmission box (33) is installed in the middle of the movable rod (30). A servo motor (31) is meshed with the side of the active right-angle gear transmission box (33). The servo motor (31) is fixedly installed inside the sample plate (9).

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