Road pavement strength detection device and detection method

Abstract

The invention relates to the field of pavement strength detection, in particular to a road pavement strength detection device and method. Comprising a vehicle body, a positioning rod, a rotating wheel, a limiting disc, a plurality of elastic abutting pieces and a visual detection piece. A counterweight assembly is arranged on the surface of the vehicle body and used for adjusting the counterweight of the vehicle body, a positioning rod is fixedly inserted into a fixing frame, and the fixing frame is fixed to the front half area of the vehicle body. The rotating wheel is located at the bottom end of the fixing frame and rotationally installed on the positioning rod. The limiting disc is located in the rotating wheel and fixedly arranged on the positioning rod in a sleeving mode. The multiple elastic abutting pieces are arranged along the peripheral face of the rotating wheel in an annular array mode, and one ends of the elastic abutting pieces abut against the surface of the limiting disc. The visual detection parts are arranged on the outer circumferential face of the rotating wheel, and each visual detection part is located between every two adjacent elastic abutting parts. Compared with a traditional detection mode, the detection device is more sufficient, intermittent detection can be carried out in the length direction of the road surface, the detection surface is relatively wide, and the detection result is more accurate.

Description

Technical Field

[0001] The present invention relates to the field of road surface strength detection, and in particular to a road surface strength detection device and a detection method. Background Art

[0002] Common testing methods for concrete pavement include static test method, dynamic rebound method, ultrasonic testing method and resistivity method, etc. The dynamic rebound method is to use a dynamic rebound instrument to conduct multi-point tests on the concrete pavement to measure the hardness of the pavement. The dynamic rebound instrument mainly relies on the rebound value as a parameter. The size of the rebound value can be used to determine how much kinetic energy of the impact hammer the concrete absorbs, and then the hardness of the concrete pavement can be determined.

[0003] A Chinese patent with announcement number CN221350964U discloses a patent document for a road strength detection device, which includes a body and a platform. The top of the body is fixedly connected to the platform, and the top of the platform is movably connected to a lifting platform; the lifting platform can adjust the height, the top of the platform is fixedly connected to a vertical column, the top of the column is fixedly connected to a beam, and the bottom of the beam is fixedly connected to a pressure sensor; the bottom of the pressure sensor is fixedly connected to a loading plate, and the loading plate is located directly above the lifting platform.

[0004] Although the above patent can make the force on the road surface more uniform and complete during use, and the reaction force on the loading plate and the lifting platform is also more uniform, which can effectively prevent damage to the loading plate and the lifting platform, this method is relatively simple and the detection surface is relatively narrow. Summary of the invention

[0005] Based on this, it is necessary to provide a road pavement strength detection device and detection method to address the above-mentioned technical problems. This detection device is more comprehensive than the traditional detection method, can perform intermittent detection along the length of the road surface, has a relatively wide detection surface, and the detection results are more accurate.

[0006] The present invention provides a road pavement strength detection device, comprising:

[0007] The vehicle body has a counterweight assembly disposed on the surface thereof for adjusting the counterweight of the vehicle body;

[0008] A positioning rod fixedly plugged into a fixing frame, wherein the fixing frame is fixed to the front half area of ​​the vehicle body;

[0009] A rotating wheel, located at the bottom end of the fixing frame and rotatably mounted on the positioning rod;

[0010] A limiting plate, located inside the rotating wheel and sleeved on the positioning rod;

[0011] A plurality of elastic abutment members are arranged in a ring array along the outer circumference of the rotating wheel, and one end of the elastic abutment member abuts against the surface of the limiting plate;

[0012] The visual detection member is arranged on the outer peripheral surface of the rotating wheel, and the visual detection member is located between two adjacent elastic abutting members.

[0013] In one embodiment, the vehicle body includes a frame, rear load-bearing wheels, a rear push handle, an adjusting slide rail, a counterweight box and an adjusting screw; a fixed frame is arranged in the front half area below the frame, a rear load-bearing wheel is arranged in the rear half area below the frame, an adjusting slide rail is arranged along the front and rear direction above the workshop, the counterweight box is installed on the adjusting slide rail and can move along the length direction of the adjusting slide rail; the rear push handle is fixed to the rear half area of ​​the upper surface of the vehicle body, the adjusting screw passes through the fixing block of the rear push handle and the end is rotatably connected to the counterweight box, and the adjusting screw is threadedly connected to the fixing block of the push handle; the adjusting screw is used to push the counterweight box and move it along the length direction of the adjusting slide rail.

[0014] In one embodiment, the fixing frame includes a first fixing plate, a plurality of connecting rods and two positioning rings; the central axes of the two positioning rings coincide and are located directly below the first fixing plate; the plurality of connecting rods are located between the first fixing plate and the two positioning rings and are used to connect the first fixing plate and the two positioning rings; and the surface of the positioning ring is provided with a plurality of positioning holes in a circular array.

[0015] In one embodiment, the surfaces of both ends of the positioning rod are provided with a plurality of positioning grooves in a circular array, the angle between the center axes of two adjacent positioning grooves is smaller than the angle between the center axes of two adjacent positioning holes, and fasteners are installed in the positioning holes, with the ends of the fasteners abutting against the positioning grooves.

[0016] In one embodiment, the outer circumference of the limiting plate has a connecting section, and the distance between the outer circumference of the limiting plate and the central axis gradually increases with the connecting section as a reference.

[0017] In one embodiment, a plurality of the connecting segments are provided, and the plurality of connecting segments are arranged in a ring array on the outer peripheral surface of the limiting plate.

[0018] In one embodiment, the rotating wheel includes a cylindrical shell and multiple pairs of first arc blocks; the cylindrical shell is arranged horizontally, and first mounting holes are coaxially opened at both side ends of the cylindrical shell, and multiple first mounting grooves and second mounting holes are opened on the outer peripheral surface of the cylindrical shell, and the multiple first mounting grooves and multiple second mounting holes are arranged in a ring array, and each first mounting groove is located between two adjacent second mounting holes, and multiple pairs of the first arc blocks are arranged in a ring array in the cylindrical shell, and the arc openings of the two first arc blocks of the same pair are opposite to the first mounting groove, and a one-way limited mounting opening is formed between the first mounting groove and the first arc block.

[0019] In one embodiment, the elastic abutment member includes an abutment portion and an elastic portion; the abutment portion is movably clamped in the mounting port along the radial direction of the cylindrical shell, one end of the elastic portion is elastically connected in the abutment portion, and the other end is used to abut against the outer peripheral surface of the limit plate.

[0020] In one embodiment, the abutment portion includes a second fixed plate, two semicircular plates, two guide rods and a plurality of limiting ribs; the two semicircular plates are respectively fixed at two ends of the second fixed plate, and a second mounting groove is provided on the opposite surfaces of the second fixed plate and the two semicircular plates, the second mounting groove spans the second fixed plate and the two semicircular plates, the two guide rods are respectively arranged at two ends of the second mounting groove, and the plurality of limiting ribs are spaced apart along the rotation direction of the columnar shell on a side of the second fixed plate away from the semicircular plates.

[0021] In one embodiment, the elastic part includes a third fixed plate, two second arc blocks and two springs; the two second arc blocks are respectively fixed at two ends of the third fixed plate, and a through hole is opened on the surface of the second arc block. The third fixed plate is movably clamped in the second mounting groove, and the second arc block is movably sleeved on the guide rod through the through hole. The two springs are respectively sleeved on the two guide rods, and the two ends of the springs are respectively connected to the surface of the second mounting groove and the surface of the second arc block.

[0022] The present invention further provides a road pavement strength detection method, which is applied to the road pavement strength detection device described in any of the above embodiments, and the method comprises:

[0023] Install the fixing frame under the vehicle body and drive the vehicle body to move slowly;

[0024] Rotate the positioning rod to change the spacing distance between the limiting plate and the plurality of elastic abutment members;

[0025] When the rotating wheel is in contact with the ground and rotates with the vehicle body, the outer peripheral surface of the limit plate will intermittently push the elastic abutment member so that the elastic abutment member impacts the ground;

[0026] As the rotating wheel rotates, the visual inspection component will perform visual inspection on the impact point.

[0027] The beneficial effects of the present invention are:

[0028] The above-mentioned road pavement strength detection device and detection method, when in use, first install the fixed frame on the front half area under the vehicle body, and then adjust the weighting component on the vehicle body according to actual detection needs, so as to increase or decrease the weighting of the front half area of ​​the vehicle body, and then adjust the positioning rod angle according to actual detection needs, so that the limit plate rotates with the rotation of the positioning rod, thereby changing the spacing distance between the outer peripheral surface of the limit plate and the multiple elastic abutment parts. During the driving process of the vehicle body, the rotating wheel will fit the ground and rotate with the movement of the vehicle body. The elastic abutment parts movably connected to the rotating wheel will continuously contact the outer peripheral surface of the limit plate, so that the elastic abutment parts will continuously impact the ground. After the impact, the rotating wheel will still rotate with the movement of the vehicle body. At this time, the visual detection part will perform visual detection on the impact point. This type of detection device is more comprehensive than traditional detection methods. It can perform intermittent detection along the length of the road surface. The detection surface is relatively wide and the detection results are more accurate. Since a counterweight assembly is arranged above the vehicle body, the counterweight assembly can be adjusted according to different material road surfaces and different strength requirements of different road surfaces, thereby changing the pressure applied to the rotating wheels by the front half of the vehicle body, so that the strength detection results are more in line with the strength requirements of the current road section.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the three-dimensional structure of the detection device provided by the present invention;

[0032] Figure 2 A schematic diagram of a partial cross-sectional structure of a detection device provided by the present invention;

[0033] Figure 3 A schematic diagram of the cross-sectional structure of the rotating wheel provided by the present invention;

[0034] Figure 4 A schematic diagram of the structure of the fixing frame and the positioning rod provided by the present invention;

[0035] Figure 5 A schematic diagram of the planar structure of the limiting plate provided by the present invention;

[0036] Figure 6 One of the structural schematic diagrams of the elastic abutment provided by the present invention;

[0037] Figure 7 The second structural schematic diagram of the elastic abutment member provided by the present invention;

[0038] Figure 8 This is the third structural schematic diagram of the elastic abutment provided by the present invention.

[0039] Reference numerals:

[0040] 100, fixing frame; 110, first fixing plate; 120, connecting rod; 130, positioning ring; 131, positioning hole; 200, positioning rod; 210, positioning groove; 220, fastener; 300, rotating wheel; 310, columnar housing; 311, first mounting hole; 312, first mounting groove; 313, second mounting hole; 314, mounting opening; 320, first arc block; 400, limiting plate; 410, connecting section; 500, elastic abutment; 510, second fixing plate; 520, semicircular plate; 530, second mounting groove; 540, guide rod; 550, limiting rib; 560, third fixing plate; 570, second arc block; 580, through hole; 590, spring; 600, visual inspection member; 710, frame; 720, rear load-bearing wheel; 730, rear push handle; 740, adjusting slide rail; 750, counterweight box; 760, adjusting screw. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0042] Combine the following Figures 1 to 8 The road pavement strength detection device and detection method of the present invention are described.

[0043] In one embodiment, a road pavement strength detection device includes a vehicle body, a positioning rod 200, a rotating wheel 300, a limiting plate 400, a plurality of elastic abutments 500 and a visual detection member 600; a counterweight assembly is provided on the surface of the vehicle body for adjusting the vehicle body counterweight, the positioning rod 200 is fixedly inserted on a fixing frame 100, and the fixing frame 100 is fixed on the front half of the vehicle body; the rotating wheel 300 is located at the bottom end of the fixing frame 100 and is rotatably mounted on the positioning rod 200; the limiting plate 400 is located in the rotating wheel 300 and is fixedly sleeved on the positioning rod 200; a plurality of elastic abutments 500 are arranged in a ring array along the outer peripheral surface of the rotating wheel 300, and one end of the elastic abutment 500 abuts against the surface of the limiting plate 400; the visual detection member 600 is arranged on the outer peripheral surface of the rotating wheel 300, and the visual detection member 600 is located between two adjacent elastic abutments 500.

[0044] Specifically, when in use, the fixing frame 100 is first installed in the front half area under the vehicle body, and then the matching components on the vehicle body can be adjusted according to actual detection needs, so as to increase or decrease the counterweight of the front half area of ​​the vehicle body, and then the angle of the positioning rod 200 is adjusted according to actual detection needs, so as to change the spacing distance between the outer peripheral surface of the limit plate 400 and the multiple elastic abutment members 500; when the vehicle body is driving, the rotating wheel 300 will fit the ground and rotate with the movement of the vehicle body, and the elastic abutment member 500 movably connected to the rotating wheel 300 will continuously contact the outer peripheral surface of the limit plate 400, so that the elastic abutment member 500 continuously impacts the ground, and the rotating wheel 300 after the impact still rotates with the movement of the vehicle body. At this time, the visual detection member 600 will perform visual detection on the impact point.

[0045] Among them, the visual detection component 600 includes an image acquisition module commonly used in the market, such as a camera, etc., and also includes an image processing module for processing images. The image processing module in this embodiment adopts an image processing module that already exists in the market, and the specific model and product are not specifically limited. During the rotation of the rotating wheel, the camera will shoot the road surface where the elastic abutment 500 abuts. After the shooting is completed, the image processing module will process the image obtained by the camera and judge the degree of damage to the road surface. In order to more accurately judge the degree of damage to the road surface, multiple image acquisition modules of the visual detection component 600 can be set, and they are respectively located between two adjacent elastic abutment members 500, for respectively acquiring images before and after the road surface detection.

[0046] When using the above-mentioned road pavement strength detection device, the fixing frame 100 is first installed in the front half area under the vehicle body. Then, the weighting component on the vehicle body can be adjusted according to actual detection needs, so as to increase or decrease the weighting condition of the front half area of ​​the vehicle body. Then, the angle of the positioning rod 200 is adjusted according to actual detection needs, so that the limit plate 400 rotates along with the rotation of the positioning rod 200, thereby changing the spacing distance between the outer peripheral surface of the limit plate 400 and the multiple elastic abutment members 500. During the driving process of the vehicle body, the rotating wheel 300 will fit the ground and rotate with the movement of the vehicle body. The elastic abutment member 500 movably connected to the rotating wheel 300 will continuously contact the outer peripheral surface of the limit plate 400, so that the elastic abutment member 500 will continuously impact the ground. After the impact, the rotating wheel 300 still rotates with the movement of the vehicle body. At this time, the visual detection member 600 will perform visual detection on the impact point. This detection device is more comprehensive than traditional detection methods, and can perform intermittent detection along the length of the road surface. The detection surface is relatively wide, and the detection result is more accurate. Since a counterweight assembly is arranged above the vehicle body, the counterweight assembly can be adjusted according to different material road surfaces and different strength requirements of different road surfaces, thereby changing the pressure applied to the rotating wheel 300 by the front half of the vehicle body, so that the strength detection result is more in line with the strength requirements of the current road section.

[0047] In one embodiment, the vehicle body includes a frame 710, a rear load-bearing wheel 720, a rear push handle 730, an adjusting slide rail 740, a counterweight box 750 and an adjusting screw 760; a fixed frame 100 is arranged in the front half area below the frame 710, a rear load-bearing wheel 720 is arranged in the rear half area below the frame 710, an adjusting slide rail 740 is arranged along the front and rear directions above the workshop, and the counterweight box 750 is installed on the adjusting slide rail 740 and can move along the length direction of the adjusting slide rail 740; the rear push handle 730 is fixed to the rear half area of ​​the upper surface of the vehicle body, the adjusting screw 760 passes through the fixed block of the rear push handle 730 and the end is rotatably connected to the counterweight box 750, and the adjusting screw 760 is threadedly connected to the fixed block of the push handle 730; the adjusting screw 760 is used to push the counterweight box 750 and move along the length direction of the adjusting slide rail 740.

[0048] In one embodiment, the fixing frame 100 includes a first fixing plate 110, a plurality of connecting rods 120 and two positioning rings 130; the central axes of the two positioning rings 130 coincide and are located directly below the first fixing plate 110; the plurality of connecting rods 120 are located between the first fixing plate 110 and the two positioning rings 130 and are used to connect the first fixing plate 110 and the two positioning rings 130; and a plurality of positioning holes 131 are provided on the surface of the positioning ring 130 in a circular array.

[0049] Specifically, the surfaces of both ends of the positioning rod 200 are provided with a plurality of positioning grooves 210 in a circular array, the angle between the central axes of two adjacent positioning grooves 210 is smaller than the angle between the central axes of two adjacent positioning holes 131 , and a fastener 220 is installed in the positioning hole 131 , and the end of the fastener 220 abuts against the positioning groove 210 .

[0050] In one embodiment, the outer circumference of the limiting plate 400 has a connecting section 410 , and the distance between the outer circumference of the limiting plate 400 and the central axis increases gradually with the connecting section 410 as a reference.

[0051] Specifically, since the distance between the outer circumference of the limit plate 400 and the central axis gradually increases based on the connecting section 410, the elastic abutment 500 installed thereon will continuously retract and protrude during the rotation of the rotating wheel 300, thereby hitting the ground close to the ground to detect the strength of the road surface.

[0052] Preferably, a plurality of connecting sections 410 are provided, and the plurality of connecting sections 410 are arranged in a ring array on the outer peripheral surface of the limiting plate 400. When a plurality of connecting sections 410 are provided, the telescopic movement of the elastic abutment member 500 will be more frequent, and the impact effect will be better. At the same time, in order to achieve a better detection effect, the positioning rod 200 can be rotated so that the limiting plate 400 fixed on the positioning rod 200 is rotated to a suitable angle.

[0053] In one embodiment, the rotating wheel 300 includes a cylindrical shell 310 and multiple pairs of first arc blocks 320; the cylindrical shell 310 is arranged horizontally, and first mounting holes 311 are coaxially opened at both side ends of the cylindrical shell 310, and multiple first mounting grooves 312 and second mounting holes 313 are opened on the outer peripheral surface of the cylindrical shell 310. The multiple first mounting grooves 312 and the multiple second mounting holes 313 are arranged in an annular array, and each first mounting groove 312 is located between two adjacent second mounting holes 313. Multiple pairs of first arc blocks 320 are arranged in an annular array in the cylindrical shell 310, and the arc openings of the two first arc blocks 320 of the same pair are opposite to the first mounting groove 312, and a one-way limited mounting opening 314 is formed between the first mounting groove 312 and the first arc block 320.

[0054] In one embodiment, the elastic abutment 500 includes an abutment portion and an elastic portion; the abutment portion is movably clamped in the mounting opening 314 along the radial direction of the cylindrical shell 310, one end of the elastic portion is elastically connected in the abutment portion, and the other end is used to abut against the outer peripheral surface of the limit plate 400.

[0055] Specifically, the abutment portion includes a second fixed plate 510, two semicircular plates 520, two guide rods 540 and a plurality of limiting ribs 550; the two semicircular plates 520 are respectively fixed at both ends of the second fixed plate 510, and a second mounting groove 530 is provided on the opposite surfaces of the second fixed plate 510 and the two semicircular plates 520. The second mounting groove 530 spans the second fixed plate 510 and the two semicircular plates 520, and the two guide rods 540 are respectively arranged at both ends of the second mounting groove. A plurality of limiting ribs 550 are arranged at intervals along the rotation direction of the columnar shell 310 on a side of the second fixed plate 510 away from the semicircular plate 520. The elastic part includes a third fixed plate 560, two second arc blocks 570 and two springs 590; the two second arc blocks 570 are respectively fixed at two ends of the third fixed plate 560, and a through hole 580 is opened on the surface of the second arc block 570. The third fixed plate 560 is movably clamped in the second mounting groove 530, and the second arc block 570 is movably sleeved on the guide rod 540 through the through hole 580. The two springs 590 are respectively sleeved on the two guide rods 540, and the two ends of the spring 590 are respectively connected to the surface of the second mounting groove and the surface of the second arc block 570.

[0056] In one embodiment, a road pavement strength detection method is applied to the road pavement strength detection device of any of the above embodiments, comprising the following steps:

[0057] The fixing frame is installed under the vehicle body, and the vehicle body is driven to move slowly.

[0058] The positioning rod is rotated to change the spacing distance between the limiting plate and the plurality of elastic abutting members.

[0059] When the rotating wheel is in contact with the ground and rotates along with the vehicle body, the outer peripheral surface of the limiting plate will intermittently push the elastic abutment member so that the elastic abutment member impacts the ground.

[0060] As the rotating wheel rotates, the visual inspection component will perform visual inspection on the impact point.

[0061] The above-mentioned road pavement strength detection method, when in use, first installs the fixing frame 100 in the front half area under the vehicle body, and then adjusts the weighting assembly on the vehicle body according to actual detection needs, so as to increase or decrease the weighting of the front half area of ​​the vehicle body, and then adjusts the angle of the positioning rod 200 according to actual detection needs, so that the limit plate 400 rotates along with the rotation of the positioning rod 200, thereby changing the spacing distance between the outer peripheral surface of the limit plate 400 and the multiple elastic abutment members 500. During the driving process of the vehicle body, the rotating wheel 300 will fit the ground and rotate with the movement of the vehicle body, and the elastic abutment member 500 movably connected to the rotating wheel 300 will continuously contact the outer peripheral surface of the limit plate 400, so that the elastic abutment member 500 continuously impacts the ground, and the rotating wheel 300 after the impact still rotates with the movement of the vehicle body. At this time, the visual detection member 600 will perform visual detection on the impact point. This detection device is more comprehensive than traditional detection methods, and can perform intermittent detection along the length of the road surface. The detection surface is relatively wide, and the detection result is more accurate. Since a counterweight assembly is arranged above the vehicle body, the counterweight assembly can be adjusted according to different material road surfaces and different strength requirements of different road surfaces, thereby changing the pressure applied to the rotating wheel 300 by the front half of the vehicle body, so that the strength detection result is more in line with the strength requirements of the current road section.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A road pavement strength detection device, characterized in that: include: The vehicle body has a counterweight assembly disposed on the surface thereof for adjusting the counterweight of the vehicle body; A positioning rod (200) is fixedly plugged into a fixing frame (100), wherein the fixing frame (100) is fixed to the front half region of the vehicle body; A rotating wheel (300) is located at the bottom end of the fixing frame (100) and is rotatably mounted on the positioning rod (200); A limiting plate (400) is located inside the rotating wheel (300) and is fixedly sleeved on the positioning rod (200); A plurality of elastic abutment members (500) are arranged in a ring array along the outer circumference of the rotating wheel (300), and one end of the elastic abutment member (500) abuts against the surface of the limiting plate (400); The visual detection member (600) is arranged on the outer peripheral surface of the rotating wheel (300), and the visual detection member (600) is located between two adjacent elastic abutment members (500).

2. The road pavement strength detection device according to claim 1, characterized in that: The vehicle body comprises a vehicle frame (710), a rear load-bearing wheel (720), a rear push handle (730), an adjustment slide rail (740), a counterweight box (750) and an adjustment screw (760); a fixing frame (100) is arranged in the front half area below the vehicle frame (710), a rear load-bearing wheel (720) is arranged in the rear half area below the vehicle frame (710), an adjustment slide rail (740) is arranged above the workshop in the front-rear direction, and the counterweight box (750) is installed on the adjustment slide rail (740). ) and can move along the length direction of the adjusting slide rail (740); the rear push handle (730) is fixed to the rear half area of ​​the upper surface of the vehicle body, the adjusting screw (760) passes through the fixing block of the rear push handle (730) and the end is rotatably connected to the counterweight box (750), and the adjusting screw (760) is threadedly connected to the fixing block of the push handle (730); the adjusting screw (760) is used to push the counterweight box (750) and move along the length direction of the adjusting slide rail (740).

3. The road pavement strength detection device according to claim 1, characterized in that: The fixing frame (100) comprises a first fixing plate (110), a plurality of connecting rods (120) and two positioning rings (130); the central axes of the two positioning rings (130) coincide and are located directly below the first fixing plate (110); the plurality of connecting rods (120) are located between the first fixing plate (110) and the two positioning rings (130) and are used to connect the first fixing plate (110) and the two positioning rings (130); and the surface of the positioning ring (130) is provided with a plurality of positioning holes (131) in a circular array; The surfaces of both ends of the positioning rod (200) are provided with a plurality of positioning grooves (210) in an annular array, the angle between the central axes of two adjacent positioning grooves (210) is smaller than the angle between the central axes of two adjacent positioning holes (131), and a fastener (220) is installed in the positioning hole (131), and the end of the fastener (220) abuts against the positioning groove (210).

4. The road pavement strength detection device according to claim 3, characterized in that: The outer circumference of the limiting plate (400) is provided with a connecting section (410), and the distance between the outer circumference of the limiting plate (400) and the central axis gradually increases with the connecting section (410) as a reference.

5. The road pavement strength detection device according to claim 4, characterized in that: A plurality of the connecting sections (410) are provided, and the plurality of connecting sections (410) are arranged in a ring array on the outer peripheral surface of the limiting plate (400).

6. The road pavement strength detection device according to claim 1, characterized in that: The rotating wheel (300) comprises a columnar shell (310) and a plurality of pairs of first arc blocks (320); the columnar shell (310) is arranged transversely, and first mounting holes (311) are coaxially opened at both side ends of the columnar shell (310); a plurality of first mounting grooves (312) and a plurality of second mounting holes (313) are opened on the outer peripheral surface of the columnar shell (310); the plurality of first mounting grooves (312) and the plurality of second mounting holes (313) are arranged in an annular array, and each of the first mounting grooves (312) is located between two adjacent second mounting holes (313); the plurality of pairs of the first arc blocks (320) are arranged in an annular array in the columnar shell (310); the arc openings of the two first arc blocks (320) of the same pair are directly opposite to the first mounting groove (312), and a one-way limited mounting opening (314) is formed between the first mounting groove (312) and the first arc block (320).

7. The road pavement strength detection device according to claim 6, characterized in that: The elastic abutment member (500) comprises an abutment portion and an elastic portion; the abutment portion is movably clamped in the mounting opening (314) along the radial direction of the columnar shell (310); one end of the elastic portion is elastically connected in the abutment portion, and the other end is used to abut against the outer peripheral surface of the limiting plate (400).

8. The road pavement strength detection device according to claim 7, characterized in that: The abutting portion comprises a second fixed plate (510), two semicircular plates (520), two guide rods (540) and a plurality of limiting ribs (550); the two semicircular plates (520) are respectively fixed at two ends of the second fixed plate (510); a second mounting groove (530) is provided on the opposite surfaces of the second fixed plate (510) and the two semicircular plates (520); the second mounting groove (530) spans the second fixed plate (510) and the two semicircular plates (520); the two guide rods (540) are respectively arranged at two ends of the second mounting groove (530); and the plurality of limiting ribs (550) are arranged at intervals along the rotation direction of the columnar shell (310) on a side of the second fixed plate (510) away from the semicircular plates (520).

9. The road pavement strength detection device according to claim 8, characterized in that: The elastic part comprises a third fixing plate (560), two second arc blocks (570) and two springs (590); the two second arc blocks (570) are respectively fixed at two ends of the third fixing plate (560); a through hole (580) is provided on the surface of the second arc block (570); the third fixing plate (560) is movably clamped in the second mounting groove (530); the second arc block (570) is movably sleeved on the guide rod (540) through the through hole (580); the two springs (590) are respectively sleeved on the two guide rods (540); and the two ends of the spring (590) are respectively connected to the surface of the second mounting groove (530) and the surface of the second arc block (570).

10. A road pavement strength detection method, applied to the road pavement strength detection device according to any one of claims 1 to 9, characterized in that: The method comprises: Install the fixing frame under the vehicle body and drive the vehicle body to move slowly; Rotate the positioning rod to change the spacing distance between the limiting plate and the plurality of elastic abutment members; When the rotating wheel is in contact with the ground and rotates with the vehicle body, the outer peripheral surface of the limit plate will intermittently push the elastic abutment member so that the elastic abutment member impacts the ground; As the rotating wheel rotates, the visual inspection component will perform visual inspection on the impact point.

Images