Pavement flatness detector for highway design

Abstract

The utility model discloses a road surface evenness detector for highway design, which comprises a frame body and wheels, the wheels are assembled on the lower side of the frame body, a first detector is arranged in the middle of the upper surface of the frame body, and unfolding devices are symmetrically arranged on the front side and the rear side of the first detector. By arranging the unfolding device, a worker can control a motor to drive a sliding stroke of a sliding block according to different road surface widths to be measured during measurement, so that a second detector assembled on the unfolding device is unfolded towards the two sides of the frame body according to requirements, the measurement width can be simply and efficiently controlled, and the measurement efficiency is improved. Therefore, a worker can conveniently carry out measurement work.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a road surface smoothness testing instrument for highway design. Background Technology

[0002] Highway pavement design is a comprehensive design of pavement structure combination and cross-sectional geometry. Its task is to design a pavement structure that can guarantee the required driving quality throughout the pavement's service life under design traffic loads and specific natural conditions, while achieving optimal economic benefits in terms of cost, maintenance, and vehicle operation. After the highway pavement is constructed, its smoothness needs to be tested. Pavement smoothness is related to driving safety, comfort, the magnitude of impact forces on the pavement, and its service life. Uneven pavement surfaces increase driving resistance and cause additional vibrations to vehicles. These vibrations cause bumpy rides, affecting driving speed and safety, and impacting driving. Therefore, pavement smoothness testing instruments are needed. Currently, pavement smoothness testing instruments are generally mounted at the front of vehicles, allowing for testing by moving vehicles. However, the testing process typically only measures a single width, requiring multiple measurements for wider pavements, thus affecting testing efficiency. Currently, there is an urgent market need for a pavement smoothness testing instrument that can easily adjust the testing width to solve the existing problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a road surface smoothness testing instrument for highway design, which solves some of the existing background technology problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a road surface smoothness testing instrument for highway design, comprising a frame and wheels. Wheels are mounted on the lower side of the frame. A first testing instrument is positioned at the center of the upper surface of the frame. Deployment devices are symmetrically arranged on the front and rear sides of the first testing instrument. Each deployment device includes a shell component. A sliding block is slidably mounted inside the shell component. A screw hole is formed on the inner side of the sliding block, and a screw rod is screwed into the screw hole. Both ends of the screw rod are rotatably connected to the shell component. The outer end of the screw rod penetrates the shell component. A motor is fixedly connected to the outer surface of the shell component. The output end of the motor is fixedly connected to the screw rod. A mounting plate is fixedly mounted on the lower end of the sliding block. A second testing instrument is mounted on the lower surface of the mounting plate. An opening is provided on the lower surface of the shell component, and a sliding outlet is formed on the outer side of the shell component.

[0005] Preferably, each of the four lower corners of the shell component is provided with a support leg, and the upper surface of the support leg is provided with a bolt, which passes through the support leg and connects it to the frame.

[0006] Preferably, a connecting rod is hinged to the upper front surface of the frame.

[0007] Preferably, the sliding block has a sliding hole inside, and a sliding rod is slidably assembled inside the sliding hole, with both ends of the sliding rod being fixedly connected to the shell component.

[0008] Preferably, pulleys are provided on both the front and rear ends and the upper and lower sides of the mounting plate, and the pulleys are connected to the shell component.

[0009] Beneficial effects

[0010] This utility model provides a road surface smoothness testing instrument for highway design. It has the following advantages: This road surface smoothness testing instrument for highway design, by setting up an unfolding device, allows the operator to control the sliding stroke of the sliding block via a motor during measurement work, according to the required road surface width. This causes the second testing instrument mounted on the unfolding device to unfold to both sides of the frame as needed, enabling simple and efficient control of the measurement width and facilitating the measurement work for the operator. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the unfolding device of this utility model.

[0013] Figure 3 This is a schematic diagram of the screw structure of this utility model.

[0014] In the diagram: 1. Frame; 2. Wheels; 3. Connecting rod; 4. First detector; 5. Deployment device; 51. Shell component; 52. Support leg; 53. Bolt; 54. Motor; 55. Sliding outlet; 56. Opening; 57. Mounting plate; 58. Screw hole; 59. Sliding block; 510. Screw; 6. Pulley; 7. Sliding rod; 8. Sliding hole; 9. Second detector. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-3This utility model provides a technical solution: a road surface smoothness testing instrument for highway design, comprising a frame 1 and wheels 2. The wheels 2 are mounted on the lower side of the frame 1. The instrument is characterized in that a connecting rod 3 is hinged to the upper surface of the front end of the frame 1. A first testing instrument 4 is positioned at the middle of the upper surface of the frame 1. Deployment devices 5 are symmetrically arranged on the front and rear sides of the first testing instrument 4. The deployment device 5 includes a shell component 51. Support legs 52 are provided at the four lower corners of the shell component 51. Bolts 53 are provided on the upper surface of the support legs 52, facilitating disassembly. The bolts 53 pass through the support legs 52 and connect to the frame 1. A sliding block 59 is slidably mounted inside the shell component 51. A sliding hole 8 is provided inside the sliding block 59. A sliding rod 7 is slidably mounted inside the sliding hole 8, and the sliding rod 7 can control the sliding direction of the sliding block 59. To limit the movement and improve the stability of the sliding block 59, both ends of the sliding rod 7 are fixedly connected to the shell component 51. A screw hole 58 is provided on the inner side of the sliding block 59, and a screw rod 510 is screwed into the screw hole 58. Both ends of the screw rod 510 are rotatably connected to the shell component 51. The outer end of the screw rod 510 passes through the shell component 51. A motor 54 is fixedly connected to the outer surface of the shell component 51. The output end of the motor 54 is fixedly connected to the screw rod 510. A mounting plate 57 is fixedly mounted on the lower end of the sliding block 59. Pulleys 6 are provided on the upper and lower sides of both ends of the mounting plate 57. The pulleys 6 are connected to the shell component 51. The pulleys 6 can reduce the friction received by the mounting plate 57. A second detector 9 is mounted on the lower surface of the mounting plate 57. An opening 56 is provided on the lower surface of the shell component 51. A sliding outlet 55 is provided on the outer side of the shell component 51.

[0017] Example: When conducting road surface smoothness testing, the frame 1 is connected to a traction vehicle, which moves the frame 1 along the road. The first testing instrument 4 tests the road surface. When the road to be tested is wide, the operator can install an unfolding device 5 on the upper surface of the frame 1. The motor 54 drives the screw 510 to rotate, and the sliding block 59, in cooperation with the screw 510, drives the mounting plate 57 to slide out. The second testing instrument 9 under the mounting plate 57 tests the road surface on both sides of the frame 1. By controlling the stroke of the sliding block 59, the extension length of the second testing instrument 9 can be controlled, thereby controlling the overall measurement range and facilitating operation by the operator.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A road surface smoothness testing instrument for highway design, comprising a frame (1) and wheels (2), wherein the wheels (2) are mounted on the lower side of the frame (1), characterized in that, A first detector (4) is installed at the middle position of the upper surface of the frame (1). An unfolding device (5) is symmetrically arranged on the front and rear sides of the first detector (4). The unfolding device (5) includes a shell component (51). A sliding block (59) is slidably assembled inside the shell component (51). A screw hole (58) is opened on the inner side of the sliding block (59). A screw rod (510) is screwed into the screw hole (58). Both the front and rear ends of the screw rod (510) rotate with the shell component (51). The outer end of the screw (510) passes through the shell component (51), and a motor (54) is fixedly connected to the outer surface of the shell component (51). The output end of the motor (54) is fixedly connected to the screw (510). The lower end of the sliding block (59) is fixedly equipped with a mounting plate (57). The lower surface of the mounting plate (57) is equipped with a second detector (9). The lower surface of the shell component (51) is provided with an opening (56), and the outer side of the shell component (51) is provided with a sliding outlet (55).

2. The road surface smoothness testing instrument for highway design according to claim 1, characterized in that... The shell component (51) is provided with four legs (52) at its lower corners. Bolts (53) are provided on the upper surface of the legs (52). The bolts (53) pass through the legs (52) and are connected to the frame (1).

3. A road surface smoothness testing instrument for highway design according to claim 1, characterized in that... A connecting rod (3) is hinged to the upper front surface of the frame (1).

4. A road surface smoothness testing instrument for highway design according to claim 1, characterized in that... The sliding block (59) has a sliding hole (8) inside, and a sliding rod (7) is slidably assembled inside the sliding hole (8). Both ends of the sliding rod (7) are fixedly connected to the shell component (51).

5. A road surface smoothness testing instrument for highway design according to claim 1, characterized in that... The mounting plate (57) is provided with pulleys (6) on both the front and rear ends and the upper and lower sides, and the pulleys (6) are connected to the shell component (51).

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