A device for testing the strength of road surface.

Abstract

This invention relates to the field of strength testing technology, and in particular to a device for testing the strength of road surfaces. The device includes a vehicle body and a frame fixedly mounted on the surface of the vehicle body. Two movable frames are slidably mounted on the upper surface of the frame in a front-rear direction. A connecting plate is fixedly connected to the front surfaces of the two movable frames. A buffer mechanism is provided on the front surface of the connecting plate. A traction mechanism is provided at the upper ends of the two movable frames, and the traction mechanism pulls a traction rope. An impact module is provided at the lower end of the traction rope. A rolling part is provided on the surface of the impact module, and a counterweight is provided at the upper end of the impact module. This design allows for continuous intermittent impact testing of the ground. During the testing process, the vehicle body can continuously move, effectively improving testing efficiency. Furthermore, the vehicle body moves smoothly and is less prone to shaking. The device is reasonably designed and facilitates testing.

Description

Technical Field

[0001] This invention relates to the field of strength testing technology, and in particular to a device for testing the strength of road pavement. Background Technology

[0002] In road surface strength testing, hammering is the usual method. However, in existing technologies, the testing device can only be stopped before hammering. Although this method can test the strength of the ground, it has obvious drawbacks. It cannot test multiple points because moving and stopping the device is inconvenient, time-consuming and cumbersome. When hammering, the device is in a stopped state, and it is moved and repositioned after hammering is completed, resulting in low testing efficiency. Therefore, we propose a device for road surface strength testing. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by proposing a device for detecting the strength of road surface.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a device for testing the strength of road surface, comprising a vehicle body and a frame fixedly mounted on the surface of the vehicle body. Two movable frames are slidably mounted on the upper surface of the frame in the front-rear direction. A connecting plate is fixedly connected to the front surface of the two movable frames. A buffer mechanism is provided on the front surface of the connecting plate. A traction mechanism is provided at the upper ends of the two movable frames. The traction mechanism pulls a traction rope. An impact module is provided at the lower end of the traction rope. A rolling part is provided on the surface of the impact module. A counterweight part is provided at the upper end of the impact module. The rear ends of the frame extend rearward, and the impact module is located inside the frame.

[0005] Preferably, wheel rails are fixedly installed on the upper surface of the frame near both sides, and limit steel is fixedly installed on the side of the wheel rail near the front and rear ends. An upper pressure steel is provided above the wheel rail, and the upper pressure steel is fixedly connected to the side of the limit steel. A support block is fixedly connected to the lower end of the movable frame, and a locking plate is fixedly connected to the side of the support block. The locking plate is movably in contact with the lower surface of the upper pressure steel. A roller is rotatably installed on the side of the support block through a connecting shaft, and the roller is movably locked into the inner side of the wheel rail.

[0006] Preferably, the buffer mechanism includes a pull rod fixedly connected to the front surface of the connecting plate, a buffer cylinder slidably sleeved at the front end of the pull rod, a piston fixedly connected to the front end of the pull rod, the piston slidingly engaging with the inner wall of the buffer cylinder, a buffer spring sleeved on the outer side of the pull rod, and a heat exchange mechanism provided on the surface of the buffer cylinder.

[0007] Preferably, the rear end of the pull rod is fixedly fitted with a first limiting cylinder, the rear end of the buffer cylinder is fixedly connected with a second limiting cylinder, and the front and rear ends of the buffer spring extend into the inner sides of the second limiting cylinder and the first limiting cylinder, respectively.

[0008] Preferably, the heat exchange mechanism includes several heat exchange tubes fixedly connected to the lower surface of the buffer cylinder and near the front end. A limiting ring is protruding from the inner wall of the buffer cylinder, and the limiting ring is located behind the heat exchange tubes. A mounting bracket is fixedly installed on the upper surface of the frame, and the mounting bracket is fixedly connected to the surface of the buffer cylinder and the lower end of the heat exchange tubes.

[0009] Preferably, the impact module includes an impact head and an end post fixedly connected to the upper end of the impact head. The rolling part includes a connecting block, and the counterweight part includes an end cylinder. The upper end of the end post is fixedly connected to an intermediate post through the connecting block. The upper end of the intermediate post is connected to the end cylinder through another connecting block. A pull rope is fixedly connected to the upper edge of the end cylinder. The ends of several pull ropes are connected to the lower end of a traction rope. The outer surface of the intermediate post is provided with annular grooves near the upper and lower edges, and mounting bolts are provided on the inner wall of the annular grooves.

[0010] Preferably, the rolling part further includes several grooves formed on the outer surface of the connecting block, a rotating shaft is fixedly connected to the inner wall of the groove, and several contact wheels are fixedly sleeved on the outer surface of the rotating shaft.

[0011] Preferably, the counterweight part further includes a fixed column fixedly connected to the bottom surface of the end cylinder, a screw sleeve sleeved on the outer surface of the fixed column and threadedly engaged with each other, a counterweight plate placed on the inner side of the end cylinder, a slot opened on the outer surface of the counterweight plate, the slot being locked on the outer side of the fixed column, and the screw sleeve pressing on the upper surface of the counterweight plate.

[0012] Preferably, side guards are fixedly fitted at both ends of the rear of the frame, and a slanted baffle is fixedly connected to the lower end of the side guard.

[0013] Preferably, the traction mechanism includes a docking block fixedly connected to the upper end of the movable frame, a connecting frame fixedly connected to the upper end of the docking block, a winding wheel rotatably installed between the two connecting frames, a motor fixedly installed on one side of the connecting frame, the output shaft of the motor fixedly connected to the central shaft of the winding wheel, and the upper end of the traction rope fixedly connected to the surface of the winding wheel.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This solution can perform continuous intermittent impact inspections on the ground. The vehicle can move continuously during the inspection process, which effectively improves the inspection efficiency. In addition, the vehicle moves relatively smoothly and is not prone to shaking. The device is reasonably designed and facilitates the inspection.

[0016] 2. When the impact module is lowered, the impact test is carried out when the lower end of the impact head touches the ground. During this process, the vehicle body can continue to move. Therefore, when using this device for testing, there is no need to stop. The entire device can keep moving, which improves the testing efficiency.

[0017] 3. After impact, the impact module falls to the ground. Under the action of the contact wheel, the impact module is dragged and moved horizontally. When the motor runs, the winding wheel rotates, winding up the traction rope, that is, winding the traction rope on the surface of the winding wheel, thereby lifting the impact module. During this process, when the impact module is retracted, or if the vehicle suddenly slows down while moving (considering that for testing, sudden acceleration while moving is extremely rare, and slow speed is mostly used for multi-point impact testing on the ground), the impact module swings. The movable frame will move forward relative to the vehicle due to inertia. When the pull rod moves forward, it compresses the buffer spring. The piston moves forward along the inner side of the buffer cylinder, compressing the air inside. The air compression plays a buffering role. The released heat can be exchanged with the outside through the heat exchange tube. Therefore, during this process, most of the kinetic energy at the movable frame will be converted into heat energy and elastic potential energy, preventing the vehicle from moving back and forth and causing instability. The device has good stability and is conducive to parking, reversing and other operations during testing.

[0018] 4. After rotating the sleeve, remove the sleeve, then place the counterweight plate into the end cylinder, with the slot secured to the outside of the fixed column. Then, rotate the sleeve again to press down on the counterweight plate for stability. This part of the structure allows for changes in the impact force, making the intensity of the test flexible. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a device for testing the strength of road surface according to the present invention;

[0020] Figure 2 This is a partial schematic diagram of a device for road surface strength testing according to the present invention;

[0021] Figure 3 This is a schematic diagram of an impact module of a device for road surface strength testing according to the present invention;

[0022] Figure 4 This is a schematic diagram of the connecting block of a device for road surface strength testing according to the present invention;

[0023] Figure 5 This is a cross-sectional view of the end cylinder of a device for testing road surface strength according to the present invention;

[0024] Figure 6 This is a schematic diagram of the buffer mechanism of a device for road surface strength testing according to the present invention;

[0025] Figure 7This is a cross-sectional view of the buffer mechanism of a device for detecting the strength of road surface according to the present invention;

[0026] Figure 8 This is a schematic diagram of the traction mechanism of a device for road surface strength testing according to the present invention;

[0027] Figure 9 This invention relates to a device for testing the strength of road surface. Figure 8 Enlarged view of point A in the middle;

[0028] Figure 10 This is another partial schematic diagram of a device for testing the strength of road surface according to the present invention.

[0029] 1. Car body; 2. Car frame; 3. Movable frame; 4. Wheel and rail; 5. Upper pressure steel; 6. Limiting steel; 7. Support block; 8. Insertion plate; 9. Roller; 10. Connecting shaft; 11. Connecting block; 12. Connecting frame; 13. Rewinding wheel; 14. Motor; 15. Connecting plate; 16. Pull rod; 17. Buffer cylinder; 18. First limiting cylinder; 19. Second limiting cylinder; 20. Buffer spring; 21. Piston; 2. Restriction ring; 23. Heat exchange tube; 25. Mounting bracket; 26. Traction rope; 27. Impact head; 28. End post; 29. ​​Connecting block; 30. Groove; 31. Rotating shaft; 32. Contact wheel; 34. Ring groove; 35. Mounting bolt; 36. Counterweight plate; 37. Slot; 38. Fixing post; 39. Swivel sleeve; 40. Pull rope; 41. End cylinder; 42. Intermediate post; 43. Side guard plate; 44. Sloping baffle. Detailed Implementation

[0030] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0031] like Figures 1-10 The device shown is for testing the strength of road surface, including a vehicle body 1 and a frame 2 fixedly mounted on the surface of the vehicle body 1. Two movable frames 3 are slidably mounted on the upper surface of the frame 2 in the front-rear direction. A connecting plate 15 is fixedly connected to the front surface of the two movable frames 3. A buffer mechanism is provided on the front surface of the connecting plate 15. A traction mechanism is provided at the upper end of the two movable frames 3. The traction mechanism pulls a traction rope 26. An impact module is provided at the lower end of the traction rope 26. A rolling part is provided on the surface of the impact module. A counterweight part is provided at the upper end of the impact module. The rear ends of the frame 2 extend rearward, and the impact module is located inside the frame 2.

[0032] This solution can perform continuous intermittent impact inspections on the ground. During the inspection, vehicle 1 can move continuously, which effectively improves the inspection efficiency. In addition, vehicle 1 moves relatively smoothly and is not prone to shaking. The device is reasonably designed and facilitates the inspection.

[0033] like Figure 8 , Figure 9 As shown, wheel rails 4 are fixedly installed on the upper surface of the frame 2 near both sides. Limiting steel 6 is fixedly installed on the side of the wheel rails 4 near the front and rear ends. An upper pressure steel 5 is provided above the wheel rails 4, and the upper pressure steel 5 is fixedly connected to the side of the limiting steel 6. A support block 7 is fixedly connected to the lower end of the movable frame 3. A locking plate 8 is fixedly connected to the side of the support block 7. The locking plate 8 is movably attached to the lower surface of the upper pressure steel 5. A roller 9 is rotatably installed on the side of the support block 7 through the connecting shaft 10. The roller 9 is movably locked into the inner side of the wheel rail 4. When the movable frame 3 moves horizontally, the roller 9 rolls along the inner side of the wheel rail 4, thereby ensuring the smoothness of the movement of the movable frame 3.

[0034] like Figure 6 , Figure 7 As shown, the buffer mechanism includes a pull rod 16 fixedly connected to the front surface of the connecting plate 15. A buffer cylinder 17 is slidably sleeved on the front end of the pull rod 16. A piston 21 is fixedly connected to the front end of the pull rod 16. The piston 21 slides in cooperation with the inner wall of the buffer cylinder 17. A buffer spring 20 is sleeved on the outer side of the pull rod 16. A heat exchange mechanism is provided on the surface of the buffer cylinder 17. A first limiting cylinder 18 is fixedly sleeved on the rear end of the pull rod 16. A second limiting cylinder 19 is fixedly connected to the rear end of the buffer cylinder 17. The front and rear ends of the buffer spring 20 extend into the inner sides of the second limiting cylinder 19 and the first limiting cylinder 18, respectively. The first limiting cylinder 18 and the second limiting cylinder 19 can increase the stability at both ends of the buffer spring 20.

[0035] like Figure 6 , Figure 7 As shown, the heat exchange mechanism includes several heat exchange tubes 23 fixedly connected to the lower surface of the buffer cylinder 17 and near the front end. A limiting ring 22 is protruding from the inner wall of the buffer cylinder 17. The limiting ring 22 is located behind the heat exchange tubes 23. A mounting bracket 25 is fixedly installed on the upper surface of the frame 2. The mounting bracket 25 is fixedly connected to the surface of the buffer cylinder 17 and the lower end of the heat exchange tubes 23. The heat exchange tubes 23 are made of seamless steel pipe, which can exchange heat with the outside world. At the same time, they have good strength and are not easy to break.

[0036] like Figure 3 , Figure 4 and Figure 5As shown, the impact module includes an impact head 27, an end post 28 fixedly connected to the upper end of the impact head 27, a rolling part including a connecting block 29, and a counterweight part including an end cylinder 41. The upper end of the end post 28 is fixedly connected to an intermediate post 42 through the connecting block 29. The upper end of the intermediate post 42 is connected to the end cylinder 41 through another connecting block 29. A pull rope 40 is fixedly connected to the upper edge of the end cylinder 41. The ends of several pull ropes 40 are connected to the lower end of the traction rope 26. The outer surface of the intermediate post 42 is provided with annular grooves 34 near the upper and lower edges. An installation bolt 35 is provided on the inner wall of the annular groove 34 for assembling and fixing the connection between the intermediate post 42, the connecting block 29, and the end cylinder 41.

[0037] The rolling part also includes several grooves 30 formed on the outer surface of the connecting block 29. A rotating shaft 31 is fixedly connected to the inner wall of the groove 30. Several contact wheels 32 are fixedly sleeved on the outer surface of the rotating shaft 31. When the impact module falls to the ground, the contact wheels 32 contact the ground to ensure that it can be dragged and will not obstruct the movement of the vehicle body 1.

[0038] The counterweight also includes a fixed post 38 fixedly connected to the bottom surface of the end cylinder 41, and a screw sleeve 39 sleeved on the outer surface of the fixed post 38 and threadedly engaged with each other. A counterweight plate 36 is placed inside the end cylinder 41. A slot 37 is opened on the outer surface of the counterweight plate 36. The slot 37 is locked on the outside of the fixed post 38. The screw sleeve 39 presses on the upper surface of the counterweight plate 36, flexibly adjusting the magnitude of the downward impact force and the detection intensity can be adjusted.

[0039] like Figure 10 As shown, side guard plates 43 are fixedly fitted at both ends of the rear of the frame 2. A slanted baffle 44 is fixedly connected to the lower end of the side guard plate 43 to prevent the impact module from colliding with the frame 2 when the vehicle body 1 turns. The side guard plate 43 and the slanted baffle 44 play a protective role.

[0040] like Figure 1 , Figure 2 As shown, the traction mechanism includes a docking block 11 fixedly connected to the upper end of the movable frame 3, a connecting frame 12 fixedly connected to the upper end of the docking block 11, a winding wheel 13 rotatably mounted between the two connecting frames 12, a motor 14 fixedly mounted on one side of the connecting frame 12, the output shaft of the motor 14 fixedly connected to the central shaft of the winding wheel 13, and the upper end of the traction rope 26 fixedly connected to the surface of the winding wheel 13.

[0041] During testing, when the impact module is lowered, an impact test is conducted when the lower end of the impact head 27 contacts the ground. During this process, the vehicle body 1 can continue moving, so there is no need to stop when using this device for testing; the entire device can maintain movement, improving testing efficiency. After the impact, the impact module falls to the ground, and under the action of the contact wheel 32, the impact module is dragged and moved horizontally. When the motor 14 runs, the winding wheel 13 rotates, winding up the traction rope 26, that is, winding the traction rope 26 onto the surface of the winding wheel 13, thereby lifting the impact module. During this process, when the impact module is retracted, or if the vehicle body 1 suddenly slows down while moving (considering that sudden acceleration during movement is rare for testing purposes, it mostly moves slowly to perform multi-point impact testing on the ground), the impact module swings, and the movable frame 3 will swing relative to it due to inertia. When the vehicle body 1 moves forward, the pull rod 16 presses the buffer spring 20, and the piston 21 moves forward along the inner side of the buffer cylinder 17, compressing the air inside. The compressed air acts as a buffer, and the released heat can be exchanged with the outside through the heat exchange tube 23. Therefore, during this process, most of the kinetic energy at the movable frame 3 will be converted into heat energy and elastic potential energy, preventing the vehicle body 1 from moving back and forth and causing instability in its center of gravity. The device has good stability and is conducive to parking, reversing and other operations during testing. After rotating the sleeve 39, remove the sleeve 39, then put the counterweight plate 36 into the end cylinder 41, and the slot 37 is stuck on the outside of the fixed column 38. Then, rotate the sleeve 39 again to press down on the counterweight plate 36 to stabilize it. Through this part of the structure, the impact force can be changed, and the intensity of the test can be adjusted flexibly.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A device for testing the strength of road surface, comprising a vehicle body (1) and a frame (2) fixedly mounted on the surface of the vehicle body (1), characterized in that: Two movable frames (3) are slidably installed on the upper surface of the frame (2) along the front-rear direction. A connecting plate (15) is fixedly connected to the front surface of the two movable frames (3). A buffer mechanism is provided on the front surface of the connecting plate (15). A traction mechanism is provided at the upper end of the two movable frames (3). The traction mechanism pulls the traction rope (26). An impact module is provided at the lower end of the traction rope (26). A rolling part is provided on the surface of the impact module. A counterweight part is provided at the upper end of the impact module. The rear ends of the frame (2) extend to the rear, and the impact module is located inside the frame (2). The impact module includes an impact head (27) and an end post (28) fixedly connected to the upper end of the impact head (27). The rolling part includes a connecting block (29), and the counterweight part includes an end cylinder (41). The upper end of the end post (28) is fixedly connected to an intermediate post (42) through the connecting block (29). The upper end of the intermediate post (42) is connected to the end cylinder (41) through another connecting block (29). A pull rope (40) is fixedly connected to the upper edge of the end cylinder (41). The ends of several pull ropes (40) are connected to the lower end of a traction rope (26). The outer surface of the intermediate post (42) is provided with annular grooves (34) near the upper and lower edges. An installation bolt (35) is provided on the inner wall of the annular groove (34). The rolling part also includes several grooves (30) formed on the outer surface of the connecting block (29), and a rotating shaft (31) is fixedly connected to the inner wall of the groove (30), and several touch wheels (32) are fixedly sleeved on the outer surface of the rotating shaft (31). The counterweight also includes a fixed post (38) fixedly connected to the bottom surface of the end cylinder (41) and a screw sleeve (39) sleeved on the outer surface of the fixed post (38) and threaded together. A counterweight plate (36) is placed on the inner side of the end cylinder (41). A slot (37) is opened on the outer surface of the counterweight plate (36). The slot (37) is stuck on the outer side of the fixed post (38). The screw sleeve (39) presses on the upper surface of the counterweight plate (36).

2. The device for road surface strength testing according to claim 1, characterized in that: Wheel rails (4) are fixedly installed on the upper surface of the frame (2) near both sides. Limiting steels (6) are fixedly installed on the side of the wheel rails (4) near the front and rear ends. An upper pressure steel (5) is provided above the wheel rails (4), and the upper pressure steel (5) is fixedly connected to the side of the limiting steel (6). A support block (7) is fixedly connected to the lower end of the movable frame (3). A locking plate (8) is fixedly connected to the side of the support block (7). The locking plate (8) is movably attached to the lower surface of the upper pressure steel (5). A roller (9) is rotatably installed on the side of the support block (7) through a connecting shaft (10). The roller (9) is movably locked into the inner side of the wheel rails (4).

3. The device for road surface strength testing according to claim 1, characterized in that: The buffer mechanism includes a pull rod (16) fixedly connected to the front surface of the connecting plate (15). A buffer cylinder (17) is slidably sleeved on the front end of the pull rod (16). A piston (21) is fixedly connected to the front end of the pull rod (16). The piston (21) slides in cooperation with the inner wall of the buffer cylinder (17). A buffer spring (20) is sleeved on the outer side of the pull rod (16). A heat exchange mechanism is provided on the surface of the buffer cylinder (17).

4. The device for road surface strength testing according to claim 3, characterized in that: The rear end of the pull rod (16) is fixedly fitted with a first limiting cylinder (18), and the rear end of the buffer cylinder (17) is fixedly connected with a second limiting cylinder (19). The front and rear ends of the buffer spring (20) extend into the inner sides of the second limiting cylinder (19) and the first limiting cylinder (18), respectively.

5. The device for road surface strength testing according to claim 3, characterized in that: The heat exchange mechanism includes several heat exchange tubes (23) fixedly connected to the lower surface of the buffer cylinder (17) and near the front end. A limiting ring (22) is protruding from the inner wall of the buffer cylinder (17). The limiting ring (22) is located behind the heat exchange tubes (23). A mounting bracket (25) is fixedly installed on the upper surface of the frame (2). The mounting bracket (25) is fixedly connected to the surface of the buffer cylinder (17) and the lower end of the heat exchange tubes (23).

6. The device for road surface strength testing according to claim 1, characterized in that: Side guards (43) are fixedly fitted at both ends of the frame (2), and a slanted baffle (44) is fixedly connected to the lower end of the side guards (43).

7. The device for road surface strength testing according to claim 1, characterized in that: The traction mechanism includes a docking block (11) fixedly connected to the upper end of the movable frame (3), a connecting frame (12) fixedly connected to the upper end of the docking block (11), a winding wheel (13) rotatably installed between the two connecting frames (12), a motor (14) fixedly installed on one side of the connecting frame (12), the output shaft of the motor (14) fixedly connected to the central shaft of the winding wheel (13), and the upper end of the traction rope (26) fixedly connected to the surface of the winding wheel (13).

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