A roadbed compaction detection device

Abstract

The present invention relates to the technical field related to highway engineering detection, specifically a roadbed compaction detection device, comprising a vehicle body and a support frame fixedly connected to the vehicle body, and also comprising a receiving seat slidably arranged on the support frame, the receiving seat is provided with a pressure detection mechanism, and the movement of the receiving seat is controlled by a reciprocating push member arranged on the support frame; an intermittent driving member is installed on the support frame, and one-way transmission members are respectively provided at both ends of the intermittent driving member. The present invention can intermittently drive the reciprocating pushing member and the traveling mechanism by starting the intermittent driving member. When the reciprocating pushing member drives the pressure detection mechanism to descend to the end of the stroke when working, the pressure detection mechanism detects the compaction of the ground, and detects the road surface compaction according to the pressure change. While ensuring the average distance between the measuring points, it can complete the detection of different ground compactions and ensure rapid detection of ground compaction.

Description

Technical Field

[0001] The present invention relates to the technical field related to highway engineering detection, in particular to a roadbed compaction detection device. Background Art

[0002] Compaction is a crucial process in highway construction. It uses external forces to rearrange soil particles, reducing interparticle gaps and increasing soil density. This not only enhances the bearing capacity of the foundation and prevents settlement or deformation under load, but also improves the stability and durability of the project, meeting design and operational requirements and ensuring safe operation. Compaction testing is a key indicator of roadbed construction quality, directly impacting the road's bearing capacity, durability, and driving safety. Testing can clearly identify the compaction status of the roadbed, allowing for timely identification and resolution of issues such as under- or over-compaction, ensuring the roadbed meets the required density and strength, thereby preventing road subsidence, cracks, and other quality issues.

[0003] The basic principle of compaction testing is to indirectly assess the degree of compaction of geotechnical structures by measuring their deformation, stress, or physical properties under specific conditions. These properties include subgrade deformation, stress distribution, rebound height, and sound wave propagation velocity. Different testing methods are based on different physical principles, but their common goal is to accurately reflect the compaction status of geotechnical structures.

[0004] Existing methods for testing roadbed compaction vary. Mechanical methods typically employ density rods, compaction roadbed densitometers, and other equipment, leveraging the mechanical properties of the soil to calculate the roadbed's compaction. Multiple measurement points are selected on the roadbed during testing, and the positions of these points must be manually adjusted when performing compaction tests at different locations. This reduces the efficiency of compaction testing and prevents accurate positioning of measurement points, resulting in inaccurate test data. Summary of the Invention

[0005] The purpose of the present invention is to provide a roadbed compaction detection device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A roadbed compaction detection device comprises a vehicle body and a support frame fixedly connected to the vehicle body;

[0008] It also includes a receiving seat slidably arranged on the support frame, the receiving seat is provided with a pressure detection mechanism, and the movement of the receiving seat is controlled by a reciprocating pushing member provided on the support frame;

[0009] An intermittent drive member is mounted on the support frame, and one-way transmission members are respectively provided at both ends of the intermittent drive member, one of the one-way transmission members is connected to the reciprocating push member, and the other one-way transmission member is connected to the traveling mechanism arranged at the bottom of the vehicle body.

[0010] The roadbed compaction detection device as described above: the pressure detection mechanism includes a plug sleeve fixedly arranged on the socket, a plurality of plug slots are formed in the plug sleeve along the length direction, one end of the inner side of the plug slot is connected to the pressure measuring device fixedly arranged in the plug sleeve, and an extrusion rod is slidably arranged in the other end, and a pressure plate is fixedly installed on the end of the extrusion rod away from the plug sleeve;

[0011] The device further comprises a second spring, which is arranged in the inserting slot, one end of the second spring abuts against the pressure measuring device, and the other end abuts against the extrusion rod.

[0012] The roadbed compaction detection equipment as described above: the reciprocating pushing member includes a conveying wheel rotatably arranged on the support frame, the two conveying wheels are connected by a conveyor belt, and a convex column is provided on the conveyor belt, and the convex column can be inserted into the limiting groove formed by the receiving seat and is slidably connected to the limiting groove.

[0013] The roadbed compaction detection device as described above: at least one set of guide grooves is formed on the support frame, and a guide rod slidably connected to the guide groove is provided on the receiving seat.

[0014] The roadbed compaction detection equipment as described above: the traveling mechanism includes a rotating shaft rotatably arranged at the bottom of the vehicle body, and traveling wheels are symmetrically arranged at both ends of the rotating shaft.

[0015] The roadbed compaction detection device as described above: the intermittent driving member includes a driving shaft rotatably arranged on the supporting frame, and a movable collar slidably connected to the supporting frame is arranged along the axial direction of the driving shaft;

[0016] It also includes a hydraulic rod fixedly mounted on the support frame, wherein the movable end of the hydraulic rod is fixedly connected to the movable collar.

[0017] The roadbed compaction detection device as described above: a slide groove is formed on the driving shaft, and the ball bearings in the movable collar are provided with balls adapted to the slide groove.

[0018] As described above, the roadbed compaction detection equipment: a first limiting sleeve is provided at each end of the driving shaft, a plurality of first locking teeth are provided on the first limiting sleeve at equal intervals along the circumference, and the first locking teeth on the two first limiting sleeves face opposite directions.

[0019] The roadbed compaction detection device as described above: the one-way transmission member includes a connecting shaft rotatably arranged on the support frame, a second limiting sleeve slidably arranged along the axial direction of the connecting shaft, and second locking teeth meshing with the first locking teeth are equidistantly distributed on the second limiting sleeve along the circumference;

[0020] It also includes a first spring, which is sleeved on the connecting shaft. One end of the first spring abuts against the second limiting sleeve, and the other end abuts against the convex circle formed by the connecting shaft.

[0021] The roadbed compaction detection equipment as described above: one of the connecting shafts is connected to the transmission shaft rotatably arranged on the support frame through a first bevel gear set, the transmission shaft is connected to the rotating shaft through a belt, and the other connecting shaft is connected to the conveying wheel through a second bevel gear set.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] By controlling the contraction and extension of the hydraulic rod to change the rotation direction of the drive shaft, the reciprocating push member and the traveling mechanism can be driven intermittently under the action of two one-way transmission parts. When the traveling mechanism is working, the position of the vehicle body on the roadbed can be changed. The reciprocating push member drives the pressure detection mechanism to rise and fall back relative to the support frame when working, and when the pressure detection mechanism drops to the end of the stroke, the pressure detection mechanism detects the compaction of the ground and detects the compaction of the road surface according to the pressure change. With the cooperation of the intermittent operation of the traveling mechanism and the pressure detection mechanism, the average distance between the measuring points is guaranteed while completing the detection of different ground compactions, ensuring that the ground compaction can be detected quickly without damaging the original compaction density of the road surface, and the movement of the vehicle body before detection and the movement during detection do not interfere with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the roadbed compaction detection equipment.

[0025] Figure 2 This is a structural diagram of the roadbed compaction detection equipment from another angle.

[0026] Figure 3 This is a structural diagram of the vehicle body and support frame in the roadbed compaction detection equipment.

[0027] Figure 4 This is a schematic diagram of the structure of the intermittent drive components and support frame in the roadbed compaction detection equipment.

[0028] Figure 5 This is a schematic diagram of the structure of the drive shaft, conveyor wheel and transmission shaft in the roadbed compaction detection equipment.

[0029] Figure 6 This is a schematic diagram of the structure of the drive shaft and one-way transmission parts in the roadbed compaction detection equipment.

[0030] Figure 7 It is a structural diagram of the one-way transmission parts in the roadbed compaction detection equipment.

[0031] Figure 8 This is a structural diagram of the drive shaft and movable collar in the roadbed compaction detection equipment.

[0032] Figure 9 This is a structural diagram of the receiving seat and reciprocating pusher in the roadbed compaction detection equipment.

[0033] Figure 10 This is a structural diagram of the reciprocating pusher and pressure detection mechanism in the roadbed compaction detection equipment.

[0034] Figure 11 This is a schematic diagram of the interior of the connector sleeve in the roadbed compaction detection equipment.

[0035] In the figure: 1. vehicle body; 2. support frame; 201. guide groove; 3. receiving seat; 301. limiting groove; 302. guide rod; 4. steering wheel; 5. traveling wheel; 6. hydraulic rod; 7. rotating shaft; 8. driving shaft; 801. slide groove; 9. first limiting sleeve; 10. movable collar; 1001. ball bearing; 11. connecting shaft; 1101. strip groove; 12. first spring; 13. second limiting sleeve; 1301. strip block; 14. first bevel gear set; 15. transmission shaft; 16. belt; 17. second bevel gear set; 18. conveyor wheel; 19. conveyor belt; 1901. boss; 20. plug-in sleeve; 2001. plug-in groove; 21. extrusion rod; 22. pressure plate; 23. second spring; 24. pressure measuring device. DETAILED DESCRIPTION

[0036] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0037] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0038] In addition, numerous specific details are provided in the following specific examples to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, and components well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0039] See also Figures 1 to 11 In an embodiment of the present invention, a roadbed compaction detection device includes a vehicle body 1 and a support frame 2 fixedly connected to the vehicle body 1;

[0040] It also includes a receiving seat 3 slidably arranged on the support frame 2, the receiving seat 3 is provided with a pressure detection mechanism, and the movement of the receiving seat 3 is controlled by a reciprocating pushing member provided on the support frame 2;

[0041] An intermittent drive member is mounted on the support frame 2 , and one-way transmission members are respectively provided at both ends of the intermittent drive member, one of the one-way transmission members is connected to the reciprocating push member, and the other one-way transmission member is connected to the traveling mechanism provided at the bottom of the vehicle body 1 .

[0042] It should be noted that a transport drive mechanism is installed at the bottom of the vehicle body 1, and the transport drive mechanism can control the traveling mechanism to travel on the road, and the output end of the transport drive mechanism is connected to the traveling mechanism through a one-way transmission to prevent the transport drive mechanism from interfering with the intermittent drive part when driving the traveling mechanism to move. The specific transport drive mechanism adopts the existing technology, and the present invention will not elaborate on it.

[0043] In detail, when the vehicle body 1 moves to the designated road section for compaction detection, by starting the intermittent driving part, the reciprocating pushing part and the traveling mechanism can be driven intermittently under the action of the two one-way transmission parts. When the traveling mechanism is working, the position of the vehicle body 1 on the roadbed can be controlled, wherein the reciprocating pushing part drives the pressure detection mechanism to rise and fall back and forth relative to the support frame 2 when working, and when the pressure detection mechanism drops to the end of the stroke, the pressure detection mechanism detects the compaction of the ground, and detects the compaction of the road surface according to the pressure change. With the cooperation of the intermittent operation of the traveling mechanism and the pressure detection mechanism, the average distance between the measuring points is guaranteed, and the detection of different ground compactions can be completed, ensuring that the ground compaction is quickly detected without damaging the original compaction density of the road surface, and the movement of the vehicle body 1 when not detected and the movement during detection do not interfere with each other.

[0044] As a further solution of the present invention, please refer to Figure 10 and Figure 11 The pressure detection mechanism includes a plug sleeve 20 fixedly arranged on the socket 3, and a plurality of plug slots 2001 are formed in the plug sleeve 20 along the length direction. One end of the inner side of the plug slot 2001 is connected to the pressure measuring device 24 fixedly arranged in the plug sleeve 20, and an extrusion rod 21 is slidably arranged in the other end. A pressure plate 22 is fixedly installed on the end of the extrusion rod 21 away from the plug sleeve 20;

[0045] The second spring 23 is further included. The second spring 23 is disposed in the inserting slot 2001 . One end of the second spring 23 abuts against the pressure measuring device 24 , and the other end abuts against the extrusion rod 21 .

[0046] When the support frame 3 is fully moved to the end of the stroke, the support frame 3 continues to move downward, and the support frame 3 continues to move downward, driving the plug sleeve 20 to move relative to the extrusion rod 21, so that the second spring 23 is compressed again. When the support frame 3 is fully moved to the end of the stroke, the compression amount of the second spring 23 is at its maximum. At this time, the pressure measuring device 24 completes the measurement of the road surface compaction and obtains the measurement result, ensuring the accuracy of the road surface compaction detection while completing the compaction detection work of different road surfaces.

[0047] It should be noted that: when the road surface compaction reaches the engineering standard, when the receiving seat 3 is completely moved down to the end of the stroke, the pressure of the road surface on the extrusion rod 21 is greater than the elastic force stored in the second spring 23 itself. At this time, the plug-in sleeve 20 moves down relative to the extrusion rod 21, and the pressure of the second spring 23 on the pressure measuring device 24 increases, and the pressure measuring device 24 transmits the detected data to the calculation.

[0048] As a further solution of the present invention, please refer to Figure 9 The reciprocating pushing member includes a conveying wheel 18 rotatably arranged on the support frame 2, the two conveying wheels 18 are connected by a conveying belt 19, and a boss 1901 is provided on the conveying belt 19, and the boss 1901 can be inserted into the limiting groove 301 formed by the receiving seat 3 and is slidably connected to the limiting groove 301.

[0049] Preferably, at least one group of guide grooves 201 is formed on the support frame 2, and a guide rod 302 is provided on the receiving seat 3, which is slidingly connected to the guide grooves 201. Under the limiting action of the guide grooves 201 and the guide rods 302, the receiving seat 3 is slidably connected to the support frame 2, thereby achieving a guiding effect on the lifting and lowering of the receiving seat 3.

[0050] Specifically, when one of the conveying wheels 18 is driven to rotate by the intermittent driving member, the conveyor belt 19 is driven by the other conveying wheel 18 to complete a set of circular motions. When the conveyor belt 19 rotates, the protruding column 1901 thereon slides back and forth relatively in the limiting groove 301, and the protruding column 1901 squeezes the receiving seat 3, so that when the conveyor belt 19 performs a set of circular motions, the receiving seat 3 completes a lifting action.

[0051] The traveling mechanism includes a rotating shaft 7 rotatably arranged at the bottom of the vehicle body 1 , and traveling wheels 5 are symmetrically arranged at both ends of the rotating shaft 7 .

[0052] A steering wheel 4 is provided at the other end of the bottom of the vehicle body 1 , and the steering wheel 4 is used for steering the vehicle body 1 and cooperating with the rotation of the running wheel 5 .

[0053] As a further solution of the present invention, please refer to Figure 4 and Figure 5 The intermittent driving member includes a driving shaft 8 rotatably arranged on the support frame 2, and a movable collar 10 slidably connected to the support frame 2 is arranged along the axial direction of the driving shaft 8;

[0054] It also includes a hydraulic rod 6 fixedly mounted on the support frame 2 , and a movable end of the hydraulic rod 6 is fixedly connected to the movable collar 10 .

[0055] A sliding groove 801 is formed on the driving shaft 8 , and a ball 1001 adapted to the sliding groove 801 is provided in the movable collar 10 .

[0056] To elaborate, when the vehicle body 1 moves to the designated road section for compaction detection, the hydraulic rod 6 is started to work. When the cylinder rod of the hydraulic rod 6 is controlled to contract, the movable collar 10 is driven to make linear motion along the axial direction of the drive shaft 8. The ball 1001 in the movable collar 10 always moves in the slide groove 801. When the ball 1001 moves upward, it generates a tilting force on the slide groove 801, causing the drive shaft 8 to rotate clockwise. Under the action of one of the one-way transmission parts, one of the conveying wheels 18 can be driven to rotate. When the hydraulic rod 6 drives the movable collar 10 to rise to the end of the stroke, the conveying wheel 18 rotates one circle, and the pressure measuring device 24 is used to detect the compaction of the ground.

[0057] When the lever of the hydraulic rod 6 is extended, the movable collar 10 is driven to move downward along the axis of the drive shaft 8. With the cooperation of the ball 1001 and the slide groove 801, the drive shaft 8 is rotated counterclockwise. At this time, under the action of the one-way transmission member located below, the rotating shaft 7 can be driven to rotate, thereby changing the detection position of the vehicle body 1. There is no need for staff to drive the vehicle body 1 to move. The distance moved each time the vehicle body 1 is detected is equal, and the compaction of different road surfaces can be quickly detected, thereby ensuring the accuracy of the road surface compaction detection.

[0058] It should be noted that the movement of the vehicle body 1 and the detection of the road surface compaction degree are performed intermittently, which is achieved by controlling the contraction and extension of the hydraulic rod 6.

[0059] A first limiting sleeve 9 is provided at both ends of the driving shaft 8 , and a plurality of first locking teeth are provided on the first limiting sleeve 9 at equal intervals along the circumference, and the first locking teeth on the two first limiting sleeves 9 face in opposite directions.

[0060] The one-way transmission member includes a connecting shaft 11 rotatably mounted on the support frame 2, a second limiting sleeve 13 slidably mounted along the axial direction of the connecting shaft 11, and second locking teeth equidistantly distributed along the circumference of the second limiting sleeve 13 that engage with the first locking teeth;

[0061] The first spring 12 is sleeved on the connecting shaft 11 , one end of the first spring 12 abuts against the second limiting sleeve 13 , and the other end abuts against the convex circle formed by the connecting shaft 11 .

[0062] Preferably, at least one group of strip grooves 1101 is formed on the connecting shaft 11, and a strip block 1301 that slides with the strip grooves 1101 is provided on the second limiting sleeve 13. Under the limiting action of the strip grooves 1101 and the strip block 1301, a sliding connection between the connecting shaft 11 and the second limiting sleeve 13 is realized, so that when the inclined surface on the first latch tooth squeezes the inclined surface on the second latch tooth, the second limiting sleeve 13 moves downward along the axis of the connecting shaft 11 to make way for the rotation of the first latch tooth.

[0063] In the embodiment of the present invention, the second tooth is arranged in a right-angled triangle structure on the side facing the first tooth, and the second tooth is arranged in a right-angled triangle structure on the side facing the first tooth. The inclined surface of the first tooth abuts the inclined surface of the second tooth. When the above-mentioned driving shaft 8 rotates clockwise, the first tooth on the upper first limiting sleeve 9 rotates relative to the second tooth. At this time, the right angle on the first tooth squeezes the right angle on the second tooth, so that the second limiting sleeve 13 rotates synchronously with the rotation of the first limiting sleeve 9. At the same time, the first tooth on the lower first limiting sleeve 9 also rotates relative to the second tooth, and the oblique angle on the first tooth squeezes the oblique angle on the second tooth, so that the first tooth generates an inclined squeezing force on the second tooth. When the first spring 12 is not compressed, the second tooth is in a stroke. At the highest end, at this time, the right-angled triangle structure formed on the first latch tooth is placed in the insertion groove formed between the two adjacent second latch teeth. When the second latch tooth is subjected to the extrusion force along the tilt, the second latch tooth moves linearly along the axial direction of the connecting shaft 11. When the second latch tooth is at the lowest part of the stroke, the end of the triangular structure formed by the first latch tooth and the end of the triangular structure formed by the second latch tooth are in the same horizontal plane. At this time, the extrusion force of the first latch tooth on the second latch tooth disappears, and then it is reset by the elastic action of the first spring 12. By changing the direction of rotation of the drive shaft 8 to complete the road surface compaction detection work, changing the position of the vehicle body 1 on the road surface, the measurement work of different road sections can be completed, and there will be no interference with the compaction detection work, further improving the efficiency of the road surface compaction detection work.

[0064] It should be noted that: when the above-mentioned drive shaft 8 rotates counterclockwise, the right angle of the first tooth on the first limiting sleeve 9 located below squeezes the right angle on the second tooth, so that when the drive shaft 8 rotates counterclockwise, it can drive the second limiting sleeve 13 located below to rotate synchronously, so as to realize the rotation requirement of the rotating shaft 7 and drive the vehicle body 1 to move on the road. The second limiting sleeve 13 located above allows me to rotate the drive shaft 8 to realize the intermittent rotation of the two connecting shafts 11.

[0065] As a further solution of the present invention, please refer to Figure 4 and Figure 5 One of the connecting shafts 11 is connected to a transmission shaft 15 rotatably arranged on the support frame 2 through a first bevel gear set 14, and the transmission shaft 15 is connected to the rotating shaft 7 through a belt 16. The other connecting shaft 11 is connected to the conveying wheel 18 through a second bevel gear set 17.

[0066] It should be noted that: when the connecting shaft 11 located at the bottom rotates, the transmission shaft 15 is driven to rotate under the action of the first bevel gear set 14, and under the action of the belt 16, the rotating shaft 7 is driven to rotate synchronously, which can change the speed of the rotating shaft 7. The connecting shaft 11 rotates one and only one circle each time. In order to ensure that the vehicle body 1 moves a certain distance, it is necessary to increase the number of rotations of the rotating shaft 7 to ensure that the compaction degree of different road surfaces can be detected.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0068] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A roadbed compaction detection device, comprising a vehicle body (1) and a support frame (2) fixedly connected to the vehicle body (1), characterized in that: It also includes a receiving seat (3) slidably arranged on the support frame (2), a pressure detection mechanism is provided on the receiving seat (3), and the movement of the receiving seat (3) is controlled by a reciprocating pushing member provided on the support frame (2); An intermittent drive member is mounted on the support frame (2), and one-way transmission members are respectively provided at both ends of the intermittent drive member, one of the one-way transmission members is connected to the reciprocating push member, and the other one-way transmission member is connected to a travel mechanism provided at the bottom of the vehicle body (1); The pressure detection mechanism comprises a plug sleeve (20) fixedly arranged on the receiving seat (3), a plurality of plug slots (2001) are formed in the plug sleeve (20) along the length direction, one end of the inner side of the plug slot (2001) is connected to a pressure measuring device (24) fixedly arranged in the plug sleeve (20), and an extrusion rod (21) is slidably arranged in the other end, and a pressure plate (22) is fixedly installed on the end of the extrusion rod (21) away from the plug sleeve (20); It also includes a second spring (23), the second spring (23) is arranged in the plug-in slot (2001), one end of the second spring (23) abuts against the pressure measuring device (24), and the other end abuts against the extrusion rod (21); The reciprocating pusher includes a conveying wheel (18) rotatably arranged on the support frame (2), the two conveying wheels (18) are connected by a conveying belt (19), and the conveying belt (19) is provided with a convex column (1901), and the convex column (1901) can be inserted into a limiting groove (301) formed by the receiving seat (3) and is slidably connected to the limiting groove (301); The intermittent driving member comprises a driving shaft (8) rotatably arranged on the support frame (2); A sliding groove (801) is formed on the driving shaft (8), and a ball (1001) adapted to the sliding groove (801) is provided in the movable collar (10); A first limiting sleeve (9) is provided at each end of the driving shaft (8), and a plurality of first latching teeth are provided on the first limiting sleeve (9) at equal intervals along the circumference, and the first latching teeth on the two first limiting sleeves (9) face in opposite directions; The one-way transmission member comprises a connecting shaft (11) rotatably arranged on the support frame (2), a second limiting sleeve (13) slidably arranged along the axial direction of the connecting shaft (11), and second teeth meshing with the first teeth distributed equidistantly along the circumference of the second limiting sleeve (13); It also includes a first spring (12), the first spring (12) is sleeved on the connecting shaft (11), one end of the first spring (12) abuts against the second limiting sleeve (13), and the other end abuts against the convex circle formed by the connecting shaft (11); When the vehicle body (1) moves to a designated road section for compaction detection, the hydraulic rod (6) is activated, and when the cylinder rod of the hydraulic rod (6) is controlled to contract, the movable collar (10) is driven to move linearly along the axial direction of the drive shaft (8), driving one of the conveying wheels (18) to rotate, and the pressure measuring device (24) is used to detect the compaction of the ground; When the driving shaft (8) rotates clockwise, the first latching tooth on the upper first limiting sleeve (9) rotates relative to the second latching tooth, so that the second limiting sleeve (13) rotates synchronously with the rotation of the first limiting sleeve (9). At the same time, the first latching tooth on the lower first limiting sleeve (9) also rotates relative to the second latching tooth, so that the first latching tooth generates an inclined squeezing force on the second latching tooth. When the first spring (12) is not compressed, the first spring (12) is elastically reset, and the measurement work of different road sections can be completed without interfering with the compaction detection work, thereby improving work efficiency. When the lever of the hydraulic rod (6) is extended, the movable collar (10) is driven to move downward along the axis of the drive shaft (8). With the cooperation of the ball (1001) and the slide groove (801), the drive shaft (8) is rotated counterclockwise. Under the action of the one-way transmission member located below, the rotating shaft (7) is driven to rotate, thereby changing the detection position of the vehicle body (1). The distance moved each time during the detection of the vehicle body (1) is equal, thereby ensuring the accuracy of the road surface compaction detection.

2. A roadbed compaction detection device according to claim 1, characterized in that: At least one set of guide grooves (201) is formed on the support frame (2), and a guide rod (302) slidably connected to the guide grooves (201) is provided on the receiving seat (3).

3. A roadbed compaction detection device according to claim 1, characterized in that: The travel mechanism comprises a rotating shaft (7) rotatably arranged at the bottom of the vehicle body (1), and travel wheels (5) are symmetrically arranged at both ends of the rotating shaft (7).

4. A roadbed compaction detection device according to claim 3, characterized in that: A movable collar (10) is provided along the axial direction of the drive shaft (8) and is slidably connected to the support frame (2); It also includes a hydraulic rod (6) fixedly mounted on the support frame (2), wherein the movable end of the hydraulic rod (6) is fixedly connected to the movable collar (10).

5. A roadbed compaction detection device according to claim 4, characterized in that: One of the connecting shafts (11) is connected to a transmission shaft (15) rotatably arranged on the support frame (2) through a first bevel gear set (14), and the transmission shaft (15) is connected to the rotating shaft (7) through a belt (16). The other connecting shaft (11) is connected to the conveying wheel (18) through a second bevel gear set (17).

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