Road hardness detection device

Abstract

The utility model discloses a road hardness detection device, which particularly relates to the technical field of road hardness detection, and comprises a trailer frame, two wheels are rotatably connected to the outer side of the trailer frame, a plurality of guide shells are fixedly connected to the inner side of the trailer frame, a first air cylinder is fixedly connected to the top of each guide shell, and a shell is fixedly connected to the bottom of each first air cylinder. A support is fixedly connected to the top of the shell, a second air cylinder is fixedly connected to the inner side of the support, a plurality of guide rods are fixedly connected to the inner side of the shell, and a balance weight adjusting mechanism is arranged on the outer sides of the guide rods. The number of the balancing weights on the inner sides of the bottom shell and the top shell of the drop hammer is increased or decreased, the impact load range can be expanded to accurately match the wheel load force of a target vehicle, meanwhile, the trailer frame is supported in a multi-point mode through the third air cylinders and the supporting seats, road pressure can be dispersed, shaking can be reduced, and the service life of the trailer frame is prolonged. Therefore, the detection range, the applicability and the stability of the road hardness detection device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of road hardness detection, and more specifically, to a road hardness detection device. Background Art

[0002] Road hardness is an important item in road inspection. Both asphalt roads and cement roads need to maintain a certain hardness to ensure the basic service life of the road. Highway inspection refers to the use of certain physical testing methods to inspect the hardness and quality of the road surface to ensure that the road surface is within a controllable tolerance range.

[0003] After the existing road hardness testing device is moved to the designated working position, the moving wheels are easily displaced when external thrust is generated, and thus cannot be stably fixed at the working position, resulting in unstable placement of the road hardness testing device, affecting the normal operation of the road hardness testing device, and thus reducing the stability of the existing road hardness testing device during use.

[0004] After searching, a Chinese patent with announcement number CN221484984U discloses a road hardness detection device. This utility model can provide a function that allows the main body of the road hardness detection device to be stably placed after reaching the designated working position, preventing the position from being offset when external thrust is generated, thereby effectively improving the stability of the existing road hardness detection device during use.

[0005] However, when the above-mentioned detection device is actually used, the vehicle axle loads borne on different road grades vary greatly, and the required drop hammer weight is different. However, the drop hammer weight used is relatively fixed, and the impact force of the drop hammer can only be adjusted by raising and lowering it to different heights. The adjustment range of the drop hammer height is not large, which affects the detection efficiency of the detection device on different roads. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a road hardness detection device to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A road hardness testing device includes a trailer frame, the outer side of the trailer frame is rotatably connected to two wheels, the inner side of the trailer frame is fixedly connected to a plurality of guide shells, the top of the guide shell is fixedly connected to a cylinder 1, the bottom of the cylinder 1 is fixedly connected to an outer shell, the outer side of the outer shell is slidably connected to the inner side of the guide shell, the top of the outer shell is fixedly connected to a bracket, the inner side of the bracket is fixedly connected to a cylinder 2, the inner side of the outer shell is fixedly connected to a plurality of guide rods, and a counterweight adjustment mechanism is provided on the outer side of the guide rod; the counterweight adjustment mechanism includes a drop hammer bottom shell The inner side of the drop hammer bottom shell is slidably connected to the outer sides of multiple guide rods, and multiple gaskets are fixedly connected to the inner wall of the drop hammer bottom shell, and multiple counterweights are arranged on the top of the gasket. The counterweights are arranged in sequence on the inner side of the drop hammer bottom shell, and a drop hammer top shell is provided on the top of the drop hammer bottom shell. The drop hammer top shell and the inner sides of the drop hammer bottom shell are threadedly connected with multiple bolts 1, and the inner side of the drop hammer top shell is fixedly connected with multiple springs, and the bottom of the spring is fixedly connected with a pressure plate, and the inner side of the drop hammer top shell is threadedly connected with multiple bolts 2; a support mechanism is provided at the bottom of the trailer frame.

[0009] By adopting the above technical solution: using multiple guide rods to guide the up and down movement of the drop hammer bottom shell and the drop hammer top shell, the drop hammer bottom shell and the drop hammer top shell can be separated, and different numbers of counterweights can be placed or removed, and combined with the different lifting heights of the drop hammer bottom shell and the drop hammer top shell, the impact force range of the drop hammer bottom shell and the drop hammer top shell on the road is expanded.

[0010] As a further description of the above technical solution: the bottom of the shell is fixedly connected to a bearing plate, the outside of the bearing plate is fixedly connected to a plurality of deflection sensors, the top of the bearing plate is fixedly connected to a load sensor, the top of the load sensor is fixedly connected to a pad, and the top of the pad is fixedly connected to a rubber seat.

[0011] By adopting the above technical solution: multiple deflection sensors are used to detect the deflection of the road caused by the impact, and multiple load sensors are used to detect the magnitude of the impact force.

[0012] As a further description of the above technical solution: the support mechanism includes multiple positioning seats, the top of the positioning seat is fixedly connected to the bottom of the trailer frame, the outer side of the positioning seat is rotatably connected to cylinder three, the bottom of cylinder three is fixedly connected to the support seat, and the bottom of the trailer frame is fixedly connected to multiple clamping seats, and the inner side of the clamping seat is clamped with the outer side of cylinder three.

[0013] By adopting the above technical solution: using multiple cylinders and support seats to support the bottom of the trailer frame at multiple points, the trailer frame can be kept stable during the impact process.

[0014] Technical effects and advantages of this utility model:

[0015] 1. Compared with the existing technology, by setting up a counterweight adjustment mechanism, the multiple counterweight blocks inside the bottom shell and top shell of the drop hammer can be added or removed. This can expand the range of impact load by increasing the hammer center or increasing the drop height, thereby accurately matching the wheel load of the target vehicle and improving the detection range and applicability of the road hardness testing device.

[0016] 2. By setting up a support mechanism, compared with the existing technology, multiple cylinders and support seats are used to support the trailer frame at multiple points, so that during the road hardness test, the pressure on the road can be dispersed while reducing the shaking of the trailer frame, thereby improving the stability of the road hardness test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the bottom structure of the present utility model.

[0019] Figure 3 It is a partial schematic diagram of the connection between the trailer frame and the positioning seat of the present utility model.

[0020] Figure 4 It is a partial schematic diagram of the connection between the shell and the bracket of the utility model.

[0021] Figure 5 It is a partial schematic diagram of the connection between the drop hammer bottom shell and the drop hammer top shell of the present invention.

[0022] Figure 6 For the utility model Figure 4 A is an enlarged schematic diagram.

[0023] The accompanying drawings are marked as follows: 1. trailer frame; 2. wheel; 3. guide shell; 4. cylinder one; 5. outer shell; 6. bracket; 7. cylinder two; 8. guide rod; 9. load-bearing plate; 10. deflection sensor; 11. load sensor; 12. pad; 13. rubber seat; 14. drop hammer bottom shell; 15. gasket; 16. counterweight; 17. drop hammer top shell; 18. bolt one; 19. spring; 20. pressure plate; 21. bolt two; 22. positioning seat; 23. cylinder three; 24. support seat; 25. clamping seat. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The embodiments of this application disclose Figure 1-6 The road hardness testing device shown in the figure includes a trailer frame 1, the outer side of the trailer frame 1 is rotatably connected to two wheels 2, the inner side of the trailer frame 1 is fixedly connected to a plurality of guide shells 3, the top of the guide shell 3 is fixedly connected to a cylinder 1 4, the bottom of the cylinder 1 4 is fixedly connected to an outer shell 5, the outer side of the outer shell 5 is slidably connected to the inner side of the guide shell 3, the top of the outer shell 5 is fixedly connected to a bracket 6, the inner side of the bracket 6 is fixedly connected to a cylinder 2 7, the inner side of the outer shell 5 is fixedly connected to a plurality of guide rods 8, and the outer side of the guide rods 8 is provided with a counterweight adjustment mechanism; the counterweight adjustment mechanism includes a drop hammer bottom shell 14, the inner side of the drop hammer bottom shell 14 is slidably connected to the outer sides of the plurality of guide rods 8, a plurality of gaskets 15 are fixedly connected to the inner wall of the drop hammer bottom shell 14, a plurality of counterweight blocks 16 are provided on the top of the gasket 15, the counterweight blocks 16 are arranged in sequence on the inner side of the drop hammer bottom shell 14, and a drop hammer top shell 17 is provided on the top of the drop hammer bottom shell 14 The inner sides of the drop hammer top shell 17 and the drop hammer bottom shell 14 are threadedly connected with multiple bolts 18, and the inner side of the drop hammer top shell 17 is fixedly connected with multiple springs 19, and the bottom of the spring 19 is fixedly connected with a pressure plate 20, and the inner side of the drop hammer top shell 17 is threadedly connected with multiple bolts 21; a supporting mechanism is provided at the bottom of the trailer frame 1, and multiple counterweights 16 are placed inside the drop hammer bottom shell 14, and then the springs 19 and pressure plates 20 inside the drop hammer top shell 17 can press down the top of the counterweight 16 inside the drop hammer bottom shell 14, and then start multiple bolts 21 to push the pressure plates 20 threadedly, so that the multiple counterweights 16 remain fixed on the inner sides of the drop hammer bottom shell 14 and the drop hammer top shell 17, and then start the cylinder 2 7 to push the drop hammer top shell 17 and the drop hammer bottom shell 14 under the guidance of multiple guide rods 8, so that the bottom end of the drop hammer bottom shell 14 can drop and impact the bearing plate 9.

[0026] Reference Figure 4 and Figure 6 As shown, a bearing plate 9 is fixedly connected to the bottom of the shell 5, a plurality of deflection sensors 10 are fixedly connected to the outside of the bearing plate 9, a load sensor 11 is fixedly connected to the top of the bearing plate 9, a pad 12 is fixedly connected to the top of the load sensor 11, and a rubber seat 13 is fixedly connected to the top of the pad 12. The plurality of deflection sensors 10 on the outside of the bearing plate 9 are used to detect the deflection of the road, and the plurality of load sensors 11 are used to detect the impact force of the falling hammer bottom shell 14 and the falling hammer top shell 17.

[0027] Reference Figure 2 and Figure 3As shown, the support mechanism includes a plurality of positioning seats 22, the top of the positioning seat 22 is fixedly connected to the bottom of the trailer frame 1, the outer side of the positioning seat 22 is rotatably connected to the cylinder three 23, the bottom of the cylinder three 23 is fixedly connected to the support seat 24, and the bottom of the trailer frame 1 is fixedly connected to a plurality of clamping seats 25, the inner side of the clamping seat 25 is clamped with the outer side of the cylinder three 23, and the cylinder three 23 is clamped by the plurality of clamping seats 25, and the road is supported by the plurality of cylinder three 23 and the support seat 24, so that the plurality of cylinder three 23 can support the trailer frame 1 at multiple points, thereby preventing the trailer frame 1 from loosening and deflecting when the hardness of the road is tested.

[0028] The working principle of the present invention is as follows: when testing the hardness of the road, the trailer frame 1 and the two wheels 2 are first pushed by the vehicle to move, and then the multiple cylinders 3 23 at the bottom of the trailer frame 1 are taken out from the inner sides of the corresponding card seats 25, and then the multiple cylinders 3 23 are rotated on the outer sides of the positioning seats 22 to extend the cylinders 3 23 toward the road, and then the support seats 24 at the bottom ends of the multiple cylinders 3 23 are brought into contact with the road, so that the multiple cylinders 3 23 and the support seats 24 support the trailer frame 1 and the road, and then the multiple cylinders 1 4 are started to push the outer shell 5 to slide on the inner side of the guide shell 3, so that the bearing plate 9 at the bottom of the outer shell 5 is brought into contact with the road, and the multiple bolts 18 are rotated and taken out from the inner sides of the drop hammer top shell 17 and the drop hammer bottom shell 14, and the multiple counterweights 16 are placed inside the drop hammer bottom shell 14 according to the weight to be used, and then Then, the drop hammer top shell 17 is realigned with the top of the drop hammer bottom shell 14, and multiple bolts 18 are used to connect and tighten the internal threads of the drop hammer top shell 17 and the drop hammer bottom shell 14. Then, the multiple bolts 21 on the top of the drop hammer top shell 17 are rotated to the inner side of the drop hammer top shell 17, so that the bottom ends of the multiple bolts 21 squeeze the top of the pressure plate 20, so that the pressure plate 20 squeezes and fixes the tops of the multiple counterweights 16. Then, the cylinder 2 7 pushes the drop hammer top shell 17 and the drop hammer bottom shell 14 to impact the multiple rubber seats 13 on the top of the pad 12, and then the pad 12, load sensor 11 and bearing plate 9 are impacted on the road through the multiple rubber seats 13. Finally, the multiple deflection sensors 10 on the outside of the bearing plate 9 are used to detect the deflection of the road surface, and the multiple load sensors 11 are used to detect the force of the impact.

[0029] The contents not described in detail in the specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the existing technology and are not described here.

[0030] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A road hardness testing device, comprising a trailer frame (1), characterized in that: The trailer frame (1) is rotatably connected to two wheels (2) on the outside, the trailer frame (1) is fixedly connected to a plurality of guide shells (3) on the inside, the top of the guide shell (3) is fixedly connected to a cylinder 1 (4), the bottom of the cylinder 1 (4) is fixedly connected to a shell (5), the outside of the shell (5) is slidably connected to the inside of the guide shell (3), the top of the shell (5) is fixedly connected to a bracket (6), the inside of the bracket (6) is fixedly connected to a cylinder 2 (7), the inside of the shell (5) is fixedly connected to a plurality of guide rods (8), and a counterweight adjustment mechanism is provided on the outside of the guide rods (8); The counterweight adjustment mechanism comprises a drop hammer bottom shell (14), the inner side of the drop hammer bottom shell (14) is slidably connected to the outer sides of a plurality of guide rods (8), a plurality of gaskets (15) are fixedly connected to the inner wall of the drop hammer bottom shell (14), a plurality of counterweight blocks (16) are arranged on the top of the gaskets (15), and the counterweight blocks (16) are sequentially arranged on the inner side of the drop hammer bottom shell (14); A supporting mechanism is provided at the bottom of the trailer frame (1).

2. The road hardness testing device according to claim 1, characterized in that: A drop hammer top shell (17) is provided on the top of the drop hammer bottom shell (14), and a plurality of bolts (18) are threadedly connected on the inner sides of the drop hammer top shell (17) and the drop hammer bottom shell (14).

3. The road hardness testing device according to claim 2, characterized in that: A plurality of springs (19) are fixedly connected to the inner side of the drop hammer top shell (17), a pressure plate (20) is fixedly connected to the bottom of the spring (19), and a plurality of bolts (21) are threadedly connected to the inner side of the drop hammer top shell (17).

4. The road hardness testing device according to claim 1, characterized in that: The bottom of the housing (5) is fixedly connected to a bearing plate (9), the outer side of the bearing plate (9) is fixedly connected to a plurality of deflection sensors (10), and the top of the bearing plate (9) is fixedly connected to a load sensor (11).

5. The road hardness testing device according to claim 4, characterized in that: A pad (12) is fixedly connected to the top of the load sensor (11), and a rubber seat (13) is fixedly connected to the top of the pad (12).

6. The road hardness testing device according to claim 1, characterized in that: The support mechanism includes a plurality of positioning seats (22), the top of each positioning seat (22) is fixedly connected to the bottom of the trailer frame (1), the outer side of each positioning seat (22) is rotatably connected to a third cylinder (23), and the bottom of each cylinder (23) is fixedly connected to a support seat (24).

7. The road hardness testing device according to claim 1, characterized in that: The bottom of the trailer frame (1) is fixedly connected with a plurality of clamping seats (25), and the inner side of the clamping seat (25) is clamped with the outer side of the cylinder three (23).

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