A road smoothness detection device

Abstract

The present invention relates to the technical field of highway detection, and discloses a highway smoothness detection device, comprising a detection frame, wherein the detection frame comprises a front frame and a rear frame slidably arranged on the front frame, the front frame is provided with a U-shaped frame, the rear frame is provided with two extension rods penetrating the U-shaped frame, the front frame and the rear frame are both rotatably provided with two sets of running wheels, the front frame is provided with a screw for fixing the rear frame, a detection mechanism is provided in the middle of the detection frame, and the detection mechanism comprises a detection block; a support plate is provided on the bottom surface of the U-shaped frame, and a fixing column is provided on the support plate. Compared with the prior art, the advantage of the present invention is that, by arranging a left-right adjustment mechanism and a front-back adjustment mechanism, when the device is tilted left-right or front-back, the position and angle of the detection block can be automatically adjusted, so that the displacement sensor can perform stable detection and the accuracy of the detection result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of highway detection, and in particular to a highway smoothness detection device. Background Art

[0002] Road surface smoothness refers to the deviation value of the longitudinal bumps on the road surface. The methods for detecting road smoothness include the fixed-length ruler method, the cross-section depiction method, and the bump accumulation method.

[0003] The eight-wheel smoothness meter uses a car to pull the device and move forward at a constant speed of 5-8km / h. The displacement sensor records the smoothness of the road surface through the displacement sensor. That is, by measuring the vertical displacement changes in the longitudinal or lateral direction of the road surface, the degree of road surface unevenness is calculated, and the mean square error is automatically determined, calculated, and printed. The measurement distance is generally 100m or 200m. When using the eight-wheel smoothness meter for testing, for the place where the wheels are moving, when the wheel surface where the wheels are moving has a bulge or depression, the entire device will tilt, which will affect the displacement sensor located in the middle of the device, causing the vertical displacement difference to become larger or smaller when the displacement sensor measures the vertical displacement changes in the longitudinal or lateral direction of the road surface, resulting in errors in the results. For example, when the ground at one wheel has a bulge, the wheel will cause the entire device to tilt left and right when passing by, or when the ground at both wheels has a bulge, the device will tilt front and back. When the device tilts, the entire device rises, which will drive the displacement sensor upward, causing errors in the test results. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a road smoothness detection device.

[0005] To solve the above technical problems, the present invention provides a technical solution as follows: a road flatness detection device, comprising a detection frame, the detection frame comprising a front frame and a rear frame slidably arranged on the front frame, the front frame being provided with a U-shaped frame, the rear frame being provided with two extension rods passing through the U-shaped frame, the front frame and the rear frame being rotatably provided with two sets of running wheels, the front frame being provided with a screw for fixing the rear frame, a detection mechanism being provided in the middle of the detection frame, the detection mechanism comprising a detection block; a support plate being provided on the bottom surface of the U-shaped frame, a fixed column being provided on the support plate, a sliding column being movably inserted into the fixed column, a spring being provided between the sliding column and the fixed column, and a detection block being provided with a ball joint on the sliding column; an adjustment mechanism being provided on the bottom surface of the support plate for raising and lowering the detection frame to drive the detection mechanism to raise and lower the detection mechanism to keep the detection mechanism parallel to the ground and the distance therebetween unchanged; the adjustment mechanism comprising a left-right adjustment mechanism and a front-back adjustment mechanism; when the detection frame is tilted left-right, the left-right adjustment mechanism is used to adjust the position and angle of the detection block so that the position of the detection block relative to the ground remains unchanged; when the detection frame is tilted front-back, the front-back adjustment mechanism is used to adjust the position and angle of the detection block so that the position of the detection block relative to the ground remains unchanged.

[0006] As an improvement, the detection mechanism also includes an extension rod 1 arranged on the bottom surface of the detection block, a rotating shaft 1 is rotatably provided on the extension rod 1, a torsion spring is provided between the rotating shaft 1 and the extension rod 1, a rotating plate is provided at both ends of the rotating shaft 1, a detection wheel is rotatably provided at one end of the rotating plate, and a rotating shaft 2 is rotatably provided at the other end of the rotating plate, a magnetic plate 1 is provided on the rotating shaft 2, a displacement sensor is provided on the detection block, and a magnetic plate 2 is provided at the output end of the displacement sensor to cooperate with the magnetic plate 1.

[0007] As an improvement, the left and right adjustment mechanism includes extension plates arranged on the left and right sides of the support plate, a telescopic rod is provided on the bottom surface of the extension plate, an auxiliary wheel is rotatably provided at one end of the telescopic rod, the telescopic rod includes a square sleeve fixedly connected to the extension plate, an insertion rod is movably inserted in the square sleeve and a spring is provided between the square sleeve, a square sleeve or an insertion rod is provided on the insertion rod for moving and driving the detection block to rotate, a sliding hole is provided on the insertion rod, a slider is slidably provided in the sliding hole and a spring is provided between the sliding hole, and the auxiliary wheel is rotatably provided on the slider.

[0008] As an improvement, the transmission assembly includes a connecting rod 1 hinged on both sides of the insertion rod 1, a square sleeve 1 is provided with a sliding hole 2 that cooperates with the connecting rod 1, the square sleeve 1 is hinged with connecting rods 2 arranged correspondingly on both sides, one end of the connecting rod 1 is hinged to one end of the connecting rod 2, the lengths of the connecting rod 1 and the connecting rod 2 are equal, the square sleeve 1 slides up and down with a bar rod 1, the bar rod 1 is provided with a groove, the connecting rod 1 and the connecting rod 2 are hinged at the joint and slide in the groove, and the extension plate is provided with a linkage assembly 1 that drives the detection block to rotate by moving the bar rod 1.

[0009] As an improvement, the linkage assembly includes a guide wheel 1 arranged on the extension plate, a fixed sleeve is provided on the bottom surface of the support plate, a sliding column is movably inserted in the fixed sleeve and a return spring is provided between the sliding column and the fixed sleeve, an L-shaped plate is provided at one end of the sliding column, the upper surface of the L-shaped plate abuts against the bottom surface of the detection block, a connecting plate 1 passing through the fixed sleeve is provided on the sliding column, a guide wheel 2 is provided on the connecting plate 1 on the bottom surface of the support plate, and a connecting rope 1 is provided on the bar 1 that is connected to the connecting plate 1 through the guide wheel 1 and the guide wheel 2.

[0010] As an improvement, the front and rear adjustment mechanism includes a guide roller 1 rotatably arranged at the front and rear ends of the support plate, a telescopic rod 2 is provided on the front frame and the rear frame, and an auxiliary wheel 2 is rotatably provided at one end of the telescopic rod 2, the telescopic rod 2 includes a square sleeve 2 arranged on the bottom surface of the front frame or the rear frame, a plug rod 2 is movably inserted in the square sleeve 2 and a spring 3 is provided between the square sleeve 2, the plug rod 2 is provided with a transmission component 2 that drives the detection block to rotate when the square sleeve 2 or the plug rod 2 moves, a sliding hole 3 is provided on the plug rod 2, a slider 2 is slidably provided in the sliding hole 3 and a spring 4 is provided between the sliding hole 3, and the auxiliary wheel 2 is rotatably arranged on the slider 2.

[0011] As an improvement, the transmission component 2 includes a connecting rod 3 hinged on both sides of the insertion rod 2, and a sliding hole 4 is provided on the square sleeve 2 to cooperate with the connecting rod 3. The square sleeve 2 is hinged with connecting rods 4 arranged correspondingly on both sides, and one end of the connecting rod 3 is hinged to one end of the connecting rod 4. The square sleeve 2 slides up and down with a bar 2, and the bar 2 is provided with a groove. The connecting rod 3 and the connecting rod 4 are hinged and slide in the groove. The front frame or the rear frame is provided with a linkage component that drives the detection block to rotate by moving the bar 2.

[0012] As an improvement, the linkage component 2 includes a guide roller 2 arranged on the front frame or the rear frame, a sleeve is provided on the support plate, a column is movably inserted in the sleeve and a spring 5 is provided between the column and the sleeve, an L-shaped plate 2 is provided at one end of the column, the upper surface of the L-shaped plate 2 abuts against the bottom surface of the detection block, a connecting plate 2 passing through the sleeve is provided on the column, and a connecting rope 2 is provided on the bar 2, which is connected to the connecting plate 2 through the guide roller 1 and the guide roller 2.

[0013] The advantages of the present invention compared with the prior art are:

[0014] 1. By connecting the detection block to the sliding column ball joint, it is convenient to rotate the detection block left and right, front and back, and change the up and down position, so as to make synchronous adjustment according to the tilting position of the detection frame in the future;

[0015] 2. By setting up left and right adjustment mechanisms and front and back adjustment mechanisms, when the device tilts left and right or front and back, the position of the detection block can be automatically adjusted to ensure stable detection of the displacement sensor and improve the accuracy of the detection results;

[0016] 3. By setting the ball joint position in the middle of the detection frame, when the detection frame is tilted left and right or front and back, since the tilting support point is the wheel that is not tilted, the detection block in the middle position needs to be rotated downward to the same degree as the tilting angle and moved downward at the same time, so as to keep the detection block parallel to the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a road smoothness detection device three-dimensional Figure 1 .

[0018] Figure 2 The present invention is a road smoothness detection device three-dimensional Figure 2 .

[0019] Figure 3 The present invention is a road smoothness detection device three-dimensional Figure 3 .

[0020] Figure 4 It is a schematic diagram of a detection mechanism of a road smoothness detection device of the present invention.

[0021] Figure 5 It is a schematic diagram of the left and right adjustment mechanism of a road smoothness detection device of the present invention.

[0022] Figure 6 It is a schematic diagram of a transmission component of a road smoothness detection device of the present invention.

[0023] Figure 7 It is a schematic diagram of a linkage assembly of a road smoothness detection device according to the present invention.

[0024] Figure 8 It is a schematic diagram of the front and rear adjustment mechanism of a road smoothness detection device of the present invention.

[0025] Figure 9 This is a schematic diagram of the second linkage component of a road smoothness detection device of the present invention.

[0026] Figure 10 It is a cross-sectional view of a road smoothness detection device of the present invention.

[0027] Figure 11 It is a schematic diagram of the principle of a road smoothness detection device of the present invention.

[0028] As shown in the figure: 1. Detection frame; 11. Front frame; 12. Rear frame; 13. Screw; 14. Travel wheel; 2. Detection mechanism; 21. Detection block; 22. Extension rod 1; 23. Rotating plate; 24. Detection wheel; 25. Magnetic plate 1; 26. Displacement sensor; 27. Magnetic plate 2; 3. U-shaped frame; 31. Extension rod 2; 4. Support plate; 41. Fixed column; 42. Sliding column; 5. Adjustment mechanism; 6. Left and right adjustment mechanism; 61. Extension plate; 62. Telescopic rod 1; 63. Auxiliary wheel 1; 64. Square sleeve 1; 65. Insert rod 1; 66. Slide hole 1; 67. Slider 1; 68. Spring 2; 7. Front and rear adjustment mechanism; 71. Guide roller 1; 72. Telescopic rod 2 ;73. Auxiliary wheel two;74. Square sleeve two;75. Insert rod two;76. Slide hole three;77. Slider two;78. Spring four;8. Transmission component one;81. Connecting rod one;82. Connecting rod two;83. Bar one;84. Linkage component one;841. Guide wheel one;842. Fixed sleeve;843. Slide column;844. L-shaped plate one;845. Connecting plate one;846. Guide wheel two;847. Connecting rope one;9. Transmission component two;91. Connecting rod three;92. Connecting rod four;93. Bar two;94. Linkage component two;95. Guide roller two;96. Sleeve;97. Insert column;98. Connecting plate two;99. Connecting rope two;910. L-shaped plate two. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below with reference to the accompanying drawings.

[0030] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 As shown, a road smoothness detection device includes a detection frame 1, the detection frame 1 includes a front frame 11 and a rear frame 12 slidably arranged on the front frame 11, the front frame 11 is provided with a U-shaped frame 3, the rear frame 12 is provided with an extension rod 31 passing through the U-shaped frame 3, the front frame 11 and the rear frame 12 are both rotatably provided with two sets of running wheels 14, the front frame 11 is provided with a screw 13 for fixing the rear frame 12, and a detection mechanism 2 is provided in the middle of the detection frame 1, and the detection mechanism 2 includes a detection block 21;

[0031] The bottom surface of the U-shaped frame 3 is provided with a support plate 4, and a fixed column 41 is provided on the support plate 4. A sliding column 42 is movably inserted on the fixed column 41, and a spring 6 is provided between the sliding column 42 and the fixed column 41. A detection block 21 is provided on the sliding column 42 with a ball joint, and the ball joint position is located at the center of the detection block 21;

[0032] The bottom surface of the support plate 4 is provided with an adjustment mechanism 5 for the detection frame 1 to move up and down and drive the detection mechanism 2 to move up and down to keep the detection mechanism 2 parallel to the ground and at a constant distance;

[0033] The adjustment mechanism 5 includes a left-right adjustment mechanism 6 and a front-back adjustment mechanism 7;

[0034] When the detection frame 1 tilts left or right, the position and angle of the detection block 21 are adjusted by the left and right adjustment mechanism 6 so that the position of the detection block 21 relative to the ground remains unchanged;

[0035] When the detection frame 1 tilts forward and backward, the position and angle of the detection block 21 are adjusted by the forward and backward adjustment mechanism 7 so that the position of the detection block 21 relative to the ground remains unchanged.

[0036] The working principle of the present invention is as follows: when using the detection frame 1 to detect the flatness of the road, the detection frame 1 is unfolded, and then the detection frame 1 is connected to the vehicle, the car is started, and the car drives the detection frame 1 to move. During the movement, the detection mechanism 2 detects the flatness of the road surface. When the running wheel 14 on one side encounters a bump or a depression, one side of the detection frame 1 will be tilted. At this time, the left and right adjustment mechanisms 6 drive the detection block 21 to rotate and move in opposite directions, so that the detection block 21 remains parallel to the ground while the distance remains unchanged. When both running wheels 14 at one end encounter a bump or a depression, one end of the detection frame 1 will be tilted. At this time, the front and rear adjustment mechanisms 7 drive the detection block 21 to rotate in opposite directions, so that the detection block 21 remains parallel to the ground while the distance remains unchanged, thereby keeping the detection mechanism 2 relatively stable during the detection process and making the detection results more accurate.

[0037] Combined with attachment Figure 1, Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 As shown, the detection mechanism 2 also includes an extension rod 22 arranged on the bottom surface of the detection block 21, and a rotating shaft 1 is rotatably provided on the extension rod 22. A torsion spring is provided between the rotating shaft 1 and the extension rod 22, and a rotating plate 23 is provided at both ends of the rotating shaft 1. A detection wheel 24 is rotatably provided at one end of the rotating plate 23, and a rotating shaft 2 is rotatably provided at the other end of the rotating plate 23. A magnetic plate 1 25 is provided on the rotating shaft 2, and a displacement sensor 26 is provided on the detection block 21. The output end of the displacement sensor 26 is provided with a magnetic plate 27 that cooperates with the magnetic plate 1 25.

[0038] Working principle of detection mechanism 2: During detection, the detection wheel 24 contacts the ground, and the torsion force of the torsion spring makes the detection wheel 24 always tightly fit with the ground. When encountering a protrusion or a depression, the detection wheel 24 will move up or down, and at this time it will drive the second shaft at the other end of the rotating plate 23 to move up, and the second shaft drives the magnetic plate 1 25 to move up, and the magnetic plate 1 25 pushes the magnetic plate 2 27 to move up, thereby pushing the output end of the displacement sensor 26 to move up, thereby recording the height difference.

[0039] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7 As shown, the left and right adjustment mechanism 6 includes an extension plate 61 arranged on the left and right sides of the support plate 4, and a telescopic rod 62 is provided on the bottom surface of the extension plate 61. An auxiliary wheel 63 is rotatably provided at one end of the telescopic rod 62. The telescopic rod 62 includes a square sleeve 64 fixedly connected to the extension plate 61, and a plug rod 65 is movably inserted in the square sleeve 64 and a spring is provided between the square sleeve 64 and the square sleeve 64. A transmission component 8 is provided on the plug rod 65, which moves the square sleeve 64 or the plug rod 65 to drive the detection block 21 to rotate. A sliding hole 66 is provided on the plug rod 65, and a slider 67 is slidably provided in the sliding hole 66 and a spring 2 68 is provided between the sliding hole 66, and the auxiliary wheel 63 is rotatably provided on the slider 67.

[0040] The working principle of the left and right adjustment mechanism 6: in the initial state, spring 1 and spring 2 68 are in a compressed state, and the elastic force of spring 1 is greater than the elastic force of spring 2 68. When one side of the detection frame 1 is tilted, the detection frame 1 forms a certain angle. At this time, the extension plate 61 connected to the U-shaped frame 3 on the tilted side moves upward, thereby driving the square sleeve 1 64 to move upward, and the square sleeve 1 64 drives the transmission component 1 8. The rising height of the transmission component 1 8 is half of the rising height of the square sleeve 1 64, so that the detection block 21 located in the middle position rotates in the opposite direction by the same angle and moves, so that the position of the detection block 21 and the ground remains unchanged. When the auxiliary wheel 1 63 passes through the protrusion or depression, the auxiliary wheel 1 63 will slide in the sliding hole 1 66. Since the elastic force of spring 2 68 is less than that of spring 1, it will not drive the insertion rod 1 65 to move, and thus will not affect the detection block 21.

[0041] Combined with attachment Figure 2 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 8 , Attachment Figure 11 As shown, the transmission assembly 8 includes a connecting rod 81 hinged on both sides of the insertion rod 65, a square sleeve 64 is provided with a sliding hole 2 that cooperates with the connecting rod 81, and the square sleeve 64 is hinged with connecting rods 82 arranged correspondingly on both sides. One end of the connecting rod 81 is hinged to one end of the connecting rod 82, and the length of the connecting rod 81 and the connecting rod 82 are equal. The square sleeve 64 slides up and down with a bar 83, and the bar 83 is provided with a groove. The hinge between the connecting rod 81 and the connecting rod 82 slides in the groove. The extension plate 61 is provided with a linkage assembly 84 that drives the detection block 21 to rotate by moving the bar 83;

[0042] The linkage assembly 84 includes a guide wheel 841 arranged on the extension plate 61, a fixed sleeve 842 is provided on the bottom surface of the support plate 4, a sliding column 843 is movably inserted in the fixed sleeve 842, and a return spring is provided between the sliding column 843 and the fixed sleeve 842, an L-shaped plate 844 is provided at one end of the sliding column 843, the upper surface of the L-shaped plate 844 abuts against the bottom surface of the detection block 21, a connecting plate 845 passing through the fixed sleeve 842 is provided on the sliding column 843, a guide wheel 2 846 is provided on the connecting plate 1 845 on the bottom surface of the support plate 4, and a connecting rope 847 is provided on the bar 83 that is connected to the connecting plate 1 845 through the guide wheel 1 841 and the guide wheel 2 846.

[0043] Transmission component 8 working principle: as shown in the attached Figure 11 As shown, when the running wheel 14 on one side encounters a protrusion, the detection frame 1 will tilt up with the running wheel 14 on the other side as the origin. Figure 11At point A in the figure, the detection block 21 on the detection frame 1 moves to point B. If the distance and angle between the detection block 21 and the ground are to remain unchanged, the detection block 21 needs to move downward and rotate at the same time. The downward movement distance is D, the rotation angle is C, and the rotation direction is opposite.

[0044] Specifically, in the initial state, the return spring and spring six are in a compressed state. When one side of the detection frame 1 is tilted, the square sleeve 1 64 moves up, driving the connecting rod 2 82 to move up. Since the connecting rod 1 81 is hinged with the connecting rod 2 82, the connecting rod 1 81 and the connecting rod 2 82 rotate. At the same time, the bar 1 83 located at the hinge point of the connecting rod 1 81 and the connecting rod 2 82 follows and moves up, and the moving distance is half of the square sleeve 1 64. At this time, the return spring pushes the sliding post 843 to move down, thereby driving the rope 1 847 connected to the sliding post 843 to move down. When it is pushed to the upward distance of the bar 1 83, it stops, the L-shaped plate 1 844 moves down, and the spring six pushes the sliding post 42 to move down. At the same time, since the L-shaped plate 1 844 on the other side is stationary, the detection block 21 rotates around the L-shaped plate 1 844 on the other side, and stops when the detection block 21 contacts the L-shaped plate 1 844. At this time, the detection block 21 rotates and moves down at the same time, so that the detection block 21 remains unchanged with the ground.

[0045] Combined with attachment Figure 3 , Attachment Figure 7 , Attachment Figure 8 As shown, the front and rear adjustment mechanism 7 includes a guide roller 1 71 rotatably arranged at the front and rear ends of the support plate 4, a telescopic rod 2 72 is provided on the front frame 11 and the rear frame 12, and an auxiliary wheel 2 73 is rotatably provided at one end of the telescopic rod 2 72, and the telescopic rod 2 72 includes a square sleeve 2 74 arranged on the bottom surface of the front frame 11 or the rear frame 12, and a plug rod 2 75 is movably inserted in the square sleeve 2 74 and a spring 3 is provided between the square sleeve 2 74 and the square sleeve 2 74, and a transmission component 2 9 is provided on the plug rod 2 75 for moving the square sleeve 2 74 or the plug rod 2 75 to drive the detection block 21 to rotate, and a sliding hole 3 76 is provided on the plug rod 2 75, and a slider 2 77 is slidably provided in the sliding hole 3 76 and a spring 4 78 is provided between the sliding hole 3 76, and the auxiliary wheel 2 73 is rotatably set on the slider 2 77.

[0046] The working principle of the front and rear adjustment mechanism 7: In the initial state, spring three and spring four 78 are in a compressed state, and the elastic force of spring three is greater than the elastic force of spring four 78. When one end of the detection frame 1 is tilted, the detection frame 1 forms a certain angle, and the tilted end moves upward, thereby driving square sleeve two 74, and square sleeve two 74 drives transmission component two 9. The rising height of transmission component two 9 is half of the rising height of square sleeve two 74, so that the detection block 21 rotates in the opposite direction by the same angle and moves downward at the same time, so that the position of the detection block 21 and the ground remains unchanged. When the auxiliary wheel two 73 passes through the protrusion or depression, the auxiliary wheel two 73 will slide in the sliding hole three 76. Since the elastic force of spring four 78 is less than that of spring one, it will not drive the insertion rod two 75 to move, and thus will not affect the detection block 21.

[0047] Combined with attachment Figure 3 , Attachment Figure 7 , Attachment Figure 8 , Attachment Figure 9 , Attachment Figure 10 As shown, the transmission assembly 2 9 includes a connecting rod 3 91 hinged on both sides of the insertion rod 2 75, a sliding hole 4 is provided on the square sleeve 2 74 to cooperate with the connecting rod 3 91, and the square sleeve 2 74 is hinged with connecting rods 4 92 arranged on both sides accordingly, one end of the connecting rod 3 91 is hinged to one end of the connecting rod 4 92, and the square sleeve 2 74 slides up and down with a bar 2 93, and the bar 2 93 is provided with a groove, and the hinge between the connecting rod 3 91 and the connecting rod 4 92 slides in the groove, and the front frame 11 or the rear frame 12 is provided with a linkage assembly 2 94 that drives the detection block 21 to rotate by moving the bar 2 93;

[0048] The linkage component 2 94 includes a guide roller 2 95 arranged on the front frame 11 or the rear frame 12, a sleeve 96 is provided on the support plate 4, a column 97 is movably inserted in the sleeve 96, and a spring 5 is provided between the column 97 and the sleeve 96, an L-shaped plate 2 910 is provided at one end of the column 97, the upper surface of the L-shaped plate 2 910 abuts against the bottom surface of the detection block 21, a connecting plate 2 98 is provided on the column 97, and a connecting rope 2 99 is provided on the bar 2 93, which is connected to the connecting plate 2 98 through the guide roller 1 71 and the guide roller 2 95.

[0049] Working principle of transmission component 2 9: In the initial state, springs 5 ​​and 6 are in compressed state, and the transmission component 2 9 has the same principle as the above-mentioned transmission component 1 8;

[0050] Specifically, when one end of the detection frame 1 is tilted, the square sleeve 2 74 moves up, driving the connecting rod 4 92 to move up. Since the connecting rod 3 91 is hinged to the connecting rod 4 92, the connecting rod 3 91 and the connecting rod 4 92 rotate. At the same time, the bar 2 93 located at the hinge of the connecting rod 3 91 and the connecting rod 4 92 follows and moves up, and the moving distance is half of the square sleeve 2 74. At this time, the spring 5 pushes the plug column 97 to move down, thereby driving the connecting rope 2 99 to move down. When it is pushed to the upward distance of the bar 2 93, it stops, the L-shaped plate 2 910 moves down, and the spring 6 pushes the sliding column 42 to move down. At the same time, since the L-shaped plate 2 910 on the other side is stationary, the detection block 21 rotates around the L-shaped plate 2 910 on the other side, and stops when the detection block 21 contacts the L-shaped plate 2 910. At this time, the detection block 21 rotates and moves down at the same time, so that the distance and angle between the detection block 21 and the ground remain unchanged.

[0051] In specific use, the detection frame 1 is first moved to the road section to be tested, and then the detection wheel 24 is brought into contact with the ground. During the movement of the detection frame 1, the moving speed is ensured to be uniform, and the detection block 21 is ensured to be in the middle position. Then, the flatness test is performed. By adjusting the mechanism 5, the detection block 21 can adapt to the tilting or depression of the detection frame 1, and the detection block 21 maintains a distance from the ground, making the test result more accurate.

[0052] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A road smoothness detection device, comprising a detection frame (1), the detection frame (1) comprising a front frame (11) and a rear frame (12) slidably arranged on the front frame (11), a U-shaped frame (3) being provided on the front frame (11), and an extension rod (31) penetrating the U-shaped frame (3) being provided on the rear frame (12), two sets of running wheels (14) being rotatably provided on both the front frame (11) and the rear frame (12), a screw (13) being provided on the front frame (11) for fixing the rear frame (12), and a detection mechanism (2) being provided in the middle of the detection frame (1), characterized in that: The detection mechanism (2) includes a detection block (21); The bottom surface of the U-shaped frame (3) is provided with a support plate (4), the support plate (4) is provided with a fixed column (41), a sliding column (42) is movably connected to the fixed column (41), and a spring (6) is provided between the sliding column (42) and the fixed column (41), and a detection block (21) is provided on the ball joint of the sliding column (42); The bottom surface of the support plate (4) is provided with an adjustment mechanism (5) for raising and lowering the detection frame (1) to drive the detection mechanism (2) to raise and lower so as to keep the detection mechanism (2) parallel to the ground and at a constant distance; The adjustment mechanism (5) includes a left-right adjustment mechanism (6) and a front-back adjustment mechanism (7); The left and right adjustment mechanism (6) includes an extension plate (61) arranged on the left and right sides of the support plate (4), a telescopic rod (62) is provided on the bottom surface of the extension plate (61), and an auxiliary wheel (63) is rotatably provided at one end of the telescopic rod (62), the telescopic rod (62) includes a square sleeve (64) fixedly connected to the extension plate (61), a plug rod (65) is movably inserted in the square sleeve (64), and a spring (65) is provided between the square sleeve (64), the plug rod (65) is provided with a transmission component (8) for driving the detection block (21) to rotate when the square sleeve (64) or the plug rod (65) moves, the plug rod (65) is provided with a sliding hole (66), a slider (67) is slidably provided in the sliding hole (66), and a spring (68) is provided between the sliding hole (66), and the auxiliary wheel (63) is rotatably provided on the slider (67); When the detection frame (1) tilts left and right, the position and angle of the detection block (21) are adjusted by the left and right adjustment mechanism (6) so that the position of the detection block (21) and the ground remains unchanged; When the detection frame (1) tilts forward and backward, the position and angle of the detection block (21) are adjusted by the forward and backward adjustment mechanism (7) so that the position of the detection block (21) and the ground remains unchanged.

2. A road smoothness detection device according to claim 1, characterized in that: The detection mechanism (2) further comprises an extension rod (22) arranged on the bottom surface of the detection block (21), a rotating shaft (22) being rotatably provided on the extension rod (22), a torsion spring being provided between the rotating shaft (22) and the extension rod (22), a rotating plate (23) being provided at both ends of the rotating shaft, a detection wheel (24) being rotatably provided at one end of the rotating plate (23), a rotating shaft (2) being rotatably provided at the other end of the rotating plate (23), a magnetic plate (25) being provided on the rotating shaft, a displacement sensor (26) being provided on the detection block (21), and a magnetic plate (27) being provided at the output end of the displacement sensor (26) and cooperating with the magnetic plate (25).

3. The road smoothness detection device according to claim 1, characterized in that: The transmission assembly (8) includes a connecting rod (81) hinged on both sides of the insertion rod (65), a square sleeve (64) is provided with a sliding hole (2) that matches the connecting rod (81), and the square sleeve (64) is hinged with a connecting rod (82) arranged on both sides. One end of the connecting rod (81) is hinged with one end of the connecting rod (82), and the lengths of the connecting rod (81) and the connecting rod (82) are equal. The square sleeve (64) slides up and down with a bar (83), and the bar (83) is provided with a groove. The hinged portion of the connecting rod (81) and the connecting rod (82) slides in the groove. The extension plate (61) is provided with a linkage assembly (84) that drives the detection block (21) to rotate by moving the bar (83).

4. A road smoothness detection device according to claim 3, characterized in that: The linkage assembly (84) includes a guide wheel (841) arranged on the extension plate (61), a fixed sleeve (842) is provided on the bottom surface of the support plate (4), a sliding column (843) is movably inserted in the fixed sleeve (842), and a return spring is provided between the sliding column (843) and the fixed sleeve (842), an L-shaped plate (844) is provided at one end of the sliding column (843), the upper surface of the L-shaped plate (844) is in contact with the bottom surface of the detection block (21), a connecting plate (845) passing through the fixed sleeve (842) is provided on the sliding column (843), a guide wheel (846) is provided on the connecting plate (845) on the bottom surface of the support plate (4), and a connecting rope (847) is provided on the bar (83) and connected to the connecting plate (845) through the guide wheel (841) and the guide wheel (846).

5. The road smoothness detection device according to claim 1, characterized in that: The front and rear adjustment mechanism (7) includes a guide roller (71) rotatably arranged at the front and rear ends of the support plate (4), a telescopic rod (72) is provided on the front frame (11) and the rear frame (12), and an auxiliary wheel (73) is rotatably provided at one end of the telescopic rod (72), the telescopic rod (72) includes a square sleeve (74) arranged on the bottom surface of the front frame (11) or the rear frame (12), a plug rod (75) is movably inserted in the square sleeve (74), and a spring (78) is provided between the square sleeve (74) and the square sleeve (74), the plug rod (75) is provided with a transmission assembly (9) for driving the detection block (21) to rotate by the square sleeve (74) or the plug rod (75), the plug rod (75) is provided with a sliding hole (76), a slider (77) is slidably provided in the sliding hole (76), and a spring (78) is provided between the slider (76) and the sliding hole (76), and the auxiliary wheel (73) is rotatably provided on the slider (77).

6. The road smoothness detection device according to claim 5, characterized in that: The transmission assembly 2 (9) includes a connecting rod 3 (91) hinged on both sides of the insertion rod 2 (75), a sliding hole 4 is provided on the square sleeve 2 (74) to cooperate with the connecting rod 3 (91), and the square sleeve 2 (74) is hinged with a connecting rod 4 (92) arranged on both sides. One end of the connecting rod 3 (91) is hinged with one end of the connecting rod 4 (92), and the square sleeve 2 (74) slides up and down with a bar 2 (93), and the bar 2 (93) is provided with a groove. The hinged part of the connecting rod 3 (91) and the connecting rod 4 (92) slides in the groove. The front frame (11) or the rear frame (12) is provided with a linkage assembly 2 (94) that drives the detection block (21) to rotate by moving the bar 2 (93).

7. A road smoothness detection device according to claim 6, characterized in that: The linkage component 2 (94) includes a guide roller 2 (95) arranged on the front frame (11) or the rear frame (12), a sleeve (96) is provided on the support plate (4), a plug post (97) is movably inserted in the sleeve (96), and a spring 5 is provided between the plug post (97) and the sleeve (96), an L-shaped plate 2 (910) is provided at one end of the plug post (97), the upper surface of the L-shaped plate 2 (910) is in contact with the bottom surface of the detection block (21), a connecting plate 2 (98) passing through the sleeve (96) is provided on the plug post (97), and a connecting rope 2 (99) is provided on the bar 2 (93) and is connected to the connecting plate 2 (98) through the guide roller 1 (71) and the guide roller 2 (95).

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