Device for measuring comprehensive performance of pavement material

Abstract

The invention is applicable to the technical field of road construction detection, and provides a pavement material comprehensive performance measuring device which comprises a workbench and a rack, the device further comprises a detection module, the detection module comprises connecting columns and a hydraulic lifting module, the bottoms of the connecting columns are connected with a mounting disc, two first moving seats are symmetrically arranged at the bottom of the mounting disc in the Y direction, two connecting columns are symmetrically arranged in each first moving seat, and a detection pressure head is arranged at the bottom of each connecting column. Two second moving seats are symmetrically arranged at the bottom of the mounting disc in the X direction, and two connecting columns in each first moving seat penetrate through the two second moving seats correspondingly. And the control module comprises a transmission module and four connecting bases, and each connecting base is connected with the corresponding first moving base or the corresponding second moving base through a set of adjusting units. The device can be suitable for detection of samples of various sizes, can simultaneously carry out multi-point detection, and is simple to operate and high in working efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of road construction inspection, and particularly relates to a device for measuring the comprehensive performance of pavement materials. Background Art

[0002] The comprehensive performance detection of pavement materials is an important link in the process of highway traffic construction. Only after ensuring that the comprehensive performance of pavement materials meets the index requirements can they be used in road construction.

[0003] In the comprehensive performance detection of pavement materials, the strength detection of pavement materials is an indispensable step. Most common detection devices in the prior art mostly control the components with pressure sensors through hydraulic mechanisms to extrude the pavement material samples to be tested, so as to measure the strength of the pavement materials.

[0004] Currently, most existing devices usually use a columnar or block-shaped component to conduct extrusion tests on pavement material samples. When testing with a single component, due to the size limitation of the component, the device can only test a single area of the pavement material sample. Especially when the sample size is large, it is impossible to conduct multi-point extrusion tests on the sample simultaneously, and the flexibility of use is poor. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a device for measuring the comprehensive performance of pavement materials, aiming to solve the problems proposed in the above background art.

[0006] The embodiments of the present invention are implemented as follows. A device for measuring the comprehensive performance of pavement materials includes a workbench, and a frame is installed on the workbench; it further includes:

[0007] A detection module, the detection module includes a connecting column installed on the frame, and a hydraulic lifting module for driving the connecting column to move up and down in the vertical direction is further provided on the frame. The bottom of the connecting column is connected with a mounting plate. Two first moving seats are symmetrically arranged at the bottom of the mounting plate along the Y direction. Two connecting columns are symmetrically arranged in each first moving seat, and the connecting columns are slidably installed in the first moving seats along the X direction. A detection indenter is provided at the bottom of each connecting column. Two second moving seats are symmetrically arranged at the bottom of the mounting plate along the X direction. The two connecting columns in the same first moving seat respectively penetrate through the two second moving seats and can slide along the Y direction in the second moving seats;

[0008] A control module, the control module includes a transmission module and four connecting seats. Each of the connecting seats is respectively connected to a corresponding first moving seat or second moving seat through a set of adjusting units. The adjusting units are used to adjust the connection state between the connecting seats and the first moving seat and the mounting plate respectively. The connecting seat connected to the first moving seat is slidably mounted on the mounting plate along the Y direction, and the connecting seat connected to the second moving seat is slidably mounted on the mounting plate along the X direction. The transmission module is mounted on the connecting column and connected to each connecting seat, and the transmission module is used to drive each connecting seat to slide on the mounting plate.

[0009] In a further technical solution, when the adjusting unit works, the connecting seat can be connected to the first moving seat or the second moving seat through the adjusting unit, and the first moving seat or the second moving seat can be kept moving synchronously with the connecting seat.

[0010] When the adjusting unit does not work, the adjusting unit will disconnect the connection state between the connecting seat and the first moving seat or the second moving seat, and the first moving seat or the second moving seat will be fixed on the mounting plate.

[0011] In a further technical solution, the hydraulic lifting module is a hydraulic telescopic rod, and is matched with a corresponding guide column. The telescopic end of the hydraulic telescopic rod is connected to the top of the connecting column, and the mounting plate is slidably mounted on the guide column in the vertical direction.

[0012] In a further technical solution, the transmission module includes a threaded sleeve sleeved on the connecting column, and a driving component for driving the threaded sleeve to rotate along the axis of the connecting column is also arranged on the connecting column. The mounting plate is mounted on the threaded sleeve. Four adjusting connecting rods are annularly distributed at the bottom of the mounting plate. The top ends of each adjusting connecting rod are hinged to the bottom of the mounting plate, and the bottom ends of each adjusting connecting rod are hinged with a hinge seat, and each hinge seat is respectively connected to a connecting seat.

[0013] In a further technical solution, the driving component includes a driving motor mounted on the connecting column. A driving motor is mounted at the bottom of the driving motor, and the output end of the driving motor is in transmission connection with the top of the threaded sleeve through a pair of meshing gears.

[0014] Further technical solution: The adjusting unit includes a sliding seat slidably mounted on the mounting plate, and a guiding groove matching the sliding seat is also formed on the mounting plate. The sliding seat is fixedly mounted on the first moving seat or the second moving seat, and the lower half of the connecting seat is inserted into the sliding seat and can slide. Two adjusting inserts are symmetrically arranged on both sides of the sliding seat. The adjusting inserts are slidably mounted in the sliding seat. A connecting hole matching the adjusting inserts is also arranged on the connecting seat. A number of positioning holes matching the adjusting inserts are formed on the side wall of the guiding groove along the sliding direction of the adjusting inserts. A moving component is also arranged in the sliding seat. The moving component is connected to the adjusting inserts and is used to adjust the connection state between the adjusting inserts, the connecting seat and the mounting plate;

[0015] When the moving component works, each adjusting insert will be inserted into the connecting hole on the connecting seat. At this time, the connecting seat will drive the sliding seat to move synchronously;

[0016] When the moving component does not work, the adjusting insert will disengage from the connecting hole, and the end of the adjusting insert away from the connecting seat will be inserted into the positioning hole. At this time, the connecting seat will slide on the sliding seat, while the relative position between the sliding seat and the mounting plate remains fixed.

[0017] Further technical solution: The moving component includes a return spring and an electromagnet mounted in the sliding seat. Each adjusting insert is connected to the inside of the sliding seat through a return spring, and an electromagnet is correspondingly arranged at each adjusting insert. When the electromagnet does not work, the return spring will be in an extended state, and the adjusting insert will be inserted into the positioning hole. When the electromagnet works, the return spring will be in a contracted state, and the adjusting insert will be inserted into the connecting hole.

[0018] An apparatus for measuring the comprehensive performance of pavement materials provided by an embodiment of the present invention, when in use, an operator first places a pavement material sample to be tested on the workbench. When used for detecting the overall strength performance of a smaller sample, the detection heads are in close contact with each other. At this time, only the detection module needs to be driven downward by the hydraulic lifting module, and the sample can be pressed by the large plane formed by the cooperation of the detection heads for detection. If multi-point detection is performed on a large sample, first start each adjustment unit synchronously so that the connecting seat can drive the corresponding first moving seat or second moving seat to move synchronously. Then, according to the position points to be measured, start the transmission module, and drive the four connecting seats to move synchronously through the transmission module. The connecting seat can drive the corresponding first moving seat or second moving seat to move synchronously. The first moving seat can drive the corresponding connecting column to move along the Y direction, and the second moving seat can drive the corresponding connecting column to move along the X direction, and the two will not interfere with each other. Thus, the detection head is moved above the specified measurement point through the connecting column. When the detection head moves to the specified position in the X direction or Y direction, the adjustment unit stops working. At this time, the adjustment unit disconnects the connection state between the connecting seat and the corresponding first moving seat or second moving seat, and fixes the first moving seat or second moving seat on the mounting plate. At this time, as the connecting seat continues to move, the corresponding first moving seat or second moving seat will not continue to move, so that the positions of other detection heads can be continuously adjusted without affecting the already positioned detection heads. After the adjustment is completed, only drive the detection module to move downward as a whole through the hydraulic lifting module, so that the detection head contacts and presses the pavement material sample, and then the test can be carried out. This device can be adapted to the detection of samples of various sizes, and can perform multi-point detection at the same time. Its operation is simple, the work efficiency is high, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an apparatus for measuring the comprehensive performance of pavement materials provided by an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of an apparatus for measuring the comprehensive performance of pavement materials provided by an embodiment of the present invention after removing the workbench;

[0021] Figure 3 is a schematic structural diagram of the cooperation between the hydraulic lifting module and the detection module in an apparatus for measuring the comprehensive performance of pavement materials provided by an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of the cooperation between the detection module and the control module in an apparatus for measuring the comprehensive performance of pavement materials provided by an embodiment of the present invention;

[0023] Figure 5 is Figure 4 an enlarged view of part A in

[0024] Figure 6 Schematic structural diagram of the cooperation between the connecting column and the mounting plate in a device for measuring the comprehensive performance of pavement materials provided by an embodiment of the present invention;

[0025] Figure 7 is Figure 6 The enlarged view at B in

[0026] In the drawings: workbench 1; frame 11; hydraulic lifting module 2; detection module 3; connecting column 31; mounting plate 32; guide groove 321; positioning hole 322; first moving seat 33; second moving seat 34; connecting column 35; detection indenter 36; control module 4; mounting plate 41; adjusting link 42; threaded sleeve 43; connecting seat 44; connecting hole 441; hinge seat 45; adjusting unit 5; sliding seat 51; adjusting insert 52; return spring 53; electromagnet 54; driving assembly 6; connecting plate 61; driving motor 62. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0029] As Figures 1 - 5 shown, a device for measuring the comprehensive performance of pavement materials provided by an embodiment of the present invention includes a workbench 1, and a frame 11 is installed on the workbench 1; further includes:

[0030] A detection module 3, the detection module 3 includes a connecting column 31 installed on the frame 11, and a hydraulic lifting module 2 for driving the connecting column 31 to move up and down in the vertical direction is further provided on the frame 11. The bottom of the connecting column 31 is connected to a mounting plate 32. Two first moving seats 33 are symmetrically arranged at the bottom of the mounting plate 32 along the Y direction. Two connecting columns 35 are symmetrically arranged in each of the first moving seats 33. The connecting columns 35 are slidably installed in the first moving seats 33 along the X direction. A detection indenter 36 is provided at the bottom of each of the connecting columns 35. Two second moving seats 34 are symmetrically arranged at the bottom of the mounting plate 32 along the X direction. The two connecting columns 35 in the same first moving seat 33 respectively penetrate through the two second moving seats 34 and can slide along the Y direction in the second moving seats 34;

[0031] A control module 4, the control module 4 includes a transmission module, and four connecting seats 44. Each of the connecting seats 44 is respectively connected to the corresponding first moving seat 33 or second moving seat 34 through a set of adjusting units 5. The adjusting unit 5 is used to adjust the connection state between the connecting seat 44 and the first moving seat 33 and the mounting plate 32 respectively. The connecting seat 44 connected to the first moving seat 33 is slidably mounted on the mounting plate 32 along the Y direction, and the connecting seat 44 connected to the second moving seat 34 is slidably mounted on the mounting plate 32 along the X direction. The transmission module is mounted on the connecting column 31 and connected to each connecting seat 44. The transmission module is used to drive each connecting seat 44 to slide on the mounting plate 32;

[0032] When the adjusting unit 5 works, the connecting seat 44 can be connected to the first moving seat 33 or the second moving seat 34 through the adjusting unit 5, and the first moving seat 33 or the second moving seat 34 is kept moving synchronously with the connecting seat 44;

[0033] When the adjusting unit 5 does not work, the adjusting unit 5 will disconnect the connection state between the connecting seat 44 and the first moving seat 33 or the second moving seat 34, and the first moving seat 33 or the second moving seat 34 is fixed on the mounting plate 32.

[0034] In the embodiments of the present invention, the detection indenter 36 can adopt a hydraulic sensing head in the prior art, and will not be specifically described herein. During use, the operator first places the road material sample to be tested on the workbench 1. When performing a whole-piece strength performance test on a relatively small sample, the detection indenters 36 are closely attached to each other. At this time, only the hydraulic lifting module 2 is directly driven to drive the detection module 3 to move downward, and the sample can be pressed by the large plane formed by the cooperation of the detection indenters 36 for detection. When performing multi-point detection on a large sample, first synchronously start each adjustment unit 5 so that the connecting seat 44 can drive the corresponding first moving seat 33 or the second moving seat 34 to move synchronously. Then, according to the position points to be measured, start the transmission module, and drive the four connecting seats 44 to move synchronously through the transmission module. The connecting seat 44 can drive the corresponding first moving seat 33 or the second moving seat 34 to move synchronously. The first moving seat 33 can drive the corresponding connecting column 35 to move along the Y direction, and the second moving seat 34 can drive the corresponding connecting column 35 to move along the X direction, and the two will not interfere with each other. Thus, the detection indenter 36 is moved above the specified measurement point through the connecting column 35. When the detection indenter 36 moves to the specified position in the X direction or the Y direction, the adjustment unit 5 stops working. At this time, the adjustment unit 5 will disconnect the connection state between the connecting seat 44 and the corresponding first moving seat 33 or the second moving seat 34, and fix the first moving seat 33 or the second moving seat 34 on the mounting plate 32. At this time, as the connecting seat 44 continues to move, the corresponding first moving seat 33 or the second moving seat 34 will not continue to move, so that the positions of other detection indenters 36 can be continuously adjusted without affecting the already positioned detection indenter 36. After the adjustment is completed, only the hydraulic lifting module 2 is driven to drive the entire detection module 3 to move downward, so that the detection indenter 36 contacts and presses the road material sample, and the test can be carried out.

[0035] As Figures 1 - 3 shown, as a preferred embodiment of the present invention, the hydraulic lifting module 2 can adopt a conventional hydraulic lifting mechanism in the prior art. Specifically, the hydraulic lifting module 2 can be a hydraulic telescopic rod, and is matched with a corresponding guide post. In this device, the telescopic end of the hydraulic telescopic rod is connected to the top of the connecting column 31, and the mounting plate 32 is slidably mounted on the guide post (not shown in the figure) in the vertical direction. By controlling the telescopic movement of the hydraulic telescopic rod, the mounting plate 32 can be driven to move up and down along the guide post.

[0036] As Figures 3 - 6As shown, as a preferred embodiment of the present invention, the transmission module includes a threaded sleeve 43 sleeved on the connecting column 31, and a driving assembly 6 for driving the threaded sleeve 43 to rotate along the axis of the connecting column 31 is further provided on the connecting column 31. An installation disk 41 is installed on the threaded sleeve 43. Four adjusting connecting rods 42 are annularly distributed at the bottom of the installation disk 41. The top ends of the adjusting connecting rods 42 are hinged to the bottom of the installation disk 41, and the bottom ends of the adjusting connecting rods 42 are respectively hinged with a hinge seat 45, and each hinge seat 45 is respectively connected to a connecting seat 44.

[0037] In the embodiment of the present invention, during use, only the driving assembly 6 needs to be started. The driving assembly 6 can drive the threaded sleeve 43 to rotate around the axis of the connecting column 31, so as to drive the installation disk 41 to move up and down along the axis of the connecting column 31. Under the limiting action of the connecting seat 44, the installation disk 41 can drive each hinge seat 45 to linearly move along the X direction or the Y direction on the installation disk 32 through the adjusting connecting rod 42, so as to drive each connecting seat 44 to slide along the specified direction on the installation disk 32.

[0038] As Figure 4 shown, as a preferred embodiment of the present invention, the driving assembly 6 includes a driving motor 61 installed on the connecting column 31. A driving motor 62 is installed at the bottom of the driving motor 61, and the output end of the driving motor 62 is in transmission connection with the top of the threaded sleeve 43 through a pair of meshing gears. <9000095>In the embodiment of the present invention, during use, only the driving motor 62 needs to be started. The power output by the driving motor 62 can be transmitted to the threaded sleeve 43 through the gears, so as to drive the threaded sleeve 43 to move around the axis of the connecting column 31.

[0040] As Figures 4 - 7As shown, as a preferred embodiment of the present invention, the adjusting unit 5 includes a sliding seat 51 slidably mounted on the mounting plate 32 (the sliding direction of the sliding seat 51 is the same as the sliding direction of the corresponding connecting seat 44), and a guiding groove 321 matching the sliding seat 51 is further formed on the mounting plate 32. The sliding seat 51 is fixedly mounted on the first moving seat 33 or the second moving seat 34, and the lower half of the connecting seat 44 is inserted into the sliding seat 51 and can slide. Two adjusting inserts 52 are symmetrically arranged on both sides of the sliding seat 51. The adjusting inserts 52 are slidably mounted in the sliding seat 51. A connecting hole 441 matching the adjusting insert 52 is further provided on the connecting seat 44. A plurality of positioning holes 322 matching the adjusting insert 52 are formed on the side wall of the guiding groove 321 along the sliding direction of the adjusting insert 52. A moving component is further arranged in the sliding seat 51. The moving component is connected to the adjusting insert 52 and is used to adjust the connection state between the adjusting insert 52, the connecting seat 44 and the mounting plate 32;

[0041] When the moving component works, each adjusting insert 52 will be inserted into the connecting hole 441 on the connecting seat 44. At this time, the connecting seat 44 will drive the sliding seat 51 to move synchronously;

[0042] When the moving component does not work, the adjusting insert 52 will disengage from the connecting hole 441, and one end of the adjusting insert 52 away from the connecting seat 44 will be inserted into the positioning hole 322. At this time, the connecting seat 44 will slide on the sliding seat 51, while the relative position between the sliding seat 51 and the mounting plate 32 remains fixed.

[0043] In the embodiment of the present invention, during use, in the initial state, the moving component is in the working state. At this time, the adjusting insert 52 will be inserted into the connecting hole 441. Therefore, during the movement of the connecting seat 44, it will drive the sliding seat 51 to move synchronously, so as to drive the corresponding first moving seat 33 or the second moving seat 34 to move synchronously through the sliding seat 51, thereby adjusting the position of the detection indenter 36. When the detection indenter 36 moves to the specified position in the X direction or the Y direction, the moving component stops working. The adjusting insert 52 will disengage from the connecting hole 441, and the other end thereof will be inserted into the positioning hole 322. At this time, the connecting seat 44 will slide on the sliding seat 51, while the relative position between the sliding seat 51 and the mounting plate 32 remains fixed. At this time, as the connecting seat 44 continues to move, the corresponding first moving seat 33 or the second moving seat 34 will not continue to move, so as to continue to adjust the positions of other detection indenters 36 without affecting the already positioned detection indenter 36.

[0044] Such as Figure 4 and Figure 5As shown, as a preferred embodiment of the present invention, the moving component includes a return spring 53 and an electromagnet 54 installed in the sliding seat 51. Each adjusting block 52 is connected to the inside of the sliding seat 51 through the return spring 53, and an electromagnet 54 is correspondingly arranged at each adjusting block 52. When the electromagnet 54 is not working, the return spring 53 is in an extended state, and the adjusting block 52 is inserted into the positioning hole 322. When the electromagnet 54 is working, the return spring 53 is in a contracted state, and the adjusting block 52 is inserted into the connection hole 441.

[0045] In the embodiment of the present invention, during use, only the start and stop of the electromagnet 54 need to be controlled. The magnetic attraction force of the electromagnet 54 can drive the adjusting block 52 to move towards the side close to the connecting seat 44. With the elastic force of the return spring 53 acting, the position of the adjusting block 52 can be adjusted to control its insertion into the positioning hole 322 or the connection hole 441.

[0046] Working principle: During use, the operator first places the pavement material sample to be tested on the workbench 1. And synchronously start each electromagnet 54. The magnetic suction force of the electromagnet 54 can drive the adjustment insert block 52 to insert into the connection hole 441, so that the connection seat 44 can drive the corresponding first moving seat 33 or the second moving seat 34 to move synchronously. Then, according to the position point to be measured, start the drive motor 62. The power output by the drive motor 62 can be transmitted to the threaded sleeve 43 through the gear, thereby driving the threaded sleeve 43 to move around the axis of the connecting column 31. The threaded sleeve 43 can drive the mounting disc 41 to move up and down along the axial direction of the connecting column 31. The mounting disc 41 can drive each hinge seat 45 to linearly move along the X direction or the Y direction on the mounting disc 32 synchronously through the adjustment connecting rod 42, thereby driving each connection seat 44 to slide along the specified direction on the mounting disc 32. The connection seat 44 can drive the corresponding first moving seat 33 or the second moving seat 34 to move synchronously. The first moving seat 33 can drive the corresponding connecting column 35 to move along the Y direction, and the second moving seat 34 can drive the corresponding connecting column 35 to move along the X direction, and the two will not interfere with each other. Thus, the detection indenter 36 is moved above the specified measurement point through the connecting column 35. When the detection indenter 36 moves to the specified position in the X direction or the Y direction, the adjustment unit 5 stops working. At this time, the electromagnet 54 stops working, and the elastic force of the return spring 53 will push the adjustment insert block 52 to disengage from the connection hole 441 and make the other end of it insert into the positioning hole 322, so that the first moving seat 33 or the second moving seat 34 is fixed on the mounting disc 32. At this time, as the connection seat 44 continues to move, the corresponding first moving seat 33 or the second moving seat 34 will not continue to move, so that the positions of other detection indenters 36 can be adjusted continuously without affecting the already positioned detection indenter 36. After the adjustment is completed, only need to drive the detection module 3 to move downward as a whole through the hydraulic lifting module 2, so that the detection indenter 36 contacts and presses the pavement material sample, and then the test can be carried out.

[0047] After the detection is completed, only need to control the drive motor 61 to reverse, and when the connection seat 44 returns to the position corresponding to the adjustment insert block 52, control the electromagnet 54 to start again, so that the adjustment insert block 52 can be inserted into the connection hole 441 again, and then each sliding seat 51 can be driven by the connection seat 44 to return to the initial position, so that each detection indenter 36 synchronously returns to the initial position.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An apparatus for measuring the comprehensive performance of pavement materials, comprising a workbench, wherein a frame is installed on the workbench, and it is characterized in that Further comprising: A detection module, the detection module includes a connecting column installed on the frame, and a hydraulic lifting module for driving the connecting column to move up and down in the vertical direction is also provided on the frame. The bottom of the connecting column is connected with a mounting plate. Two first moving seats are symmetrically arranged along the Y direction at the bottom of the mounting plate. Two connecting columns are symmetrically arranged in each first moving seat, and the connecting columns are slidably installed in the first moving seats along the X direction. A detection pressure head is provided at the bottom of each connecting column. Two second moving seats are symmetrically arranged along the X direction at the bottom of the mounting plate. The two connecting columns in the same first moving seat respectively penetrate through the two second moving seats and can slide along the Y direction in the second moving seats; A control module, the control module includes a transmission module and four connecting seats. Each connecting seat is respectively connected with the corresponding first moving seat or second moving seat through a set of adjusting units. The adjusting units are used to adjust the connection state between the connecting seat and the first moving seat and the mounting plate respectively. The connecting seat connected with the first moving seat is slidably installed on the mounting plate along the Y direction. The connecting seat connected with the second moving seat is slidably installed on the mounting plate along the X direction. The transmission module is installed on the connecting column and connected with each connecting seat. The transmission module is used to drive each connecting seat to slide on the mounting plate.

2. The comprehensive performance measuring device for pavement materials according to claim 1, wherein When the adjusting unit works, the connecting seat is connected with the first moving seat or the second moving seat through the adjusting unit, and the first moving seat or the second moving seat is kept moving synchronously with the connecting seat; When the adjusting unit does not work, the adjusting unit disconnects the connection state between the connecting seat and the first moving seat or the second moving seat, and the first moving seat or the second moving seat is fixed on the mounting plate.

3. The pavement material comprehensive performance measuring device according to claim 1, characterized in that, The hydraulic lifting module is a hydraulic telescopic rod and is matched with a corresponding guiding column. The telescopic end of the hydraulic telescopic rod is connected with the top of the connecting column. The mounting plate is slidably installed on the guiding column in the vertical direction.

4. The comprehensive performance measuring device for pavement materials according to claim 1, characterized in that The transmission module includes a threaded sleeve sleeved on the connecting column, and a driving component for driving the threaded sleeve to rotate along the axis of the connecting column is also provided on the connecting column. A mounting plate is installed on the threaded sleeve. Four adjusting connecting rods are annularly distributed at the bottom of the mounting plate. The top ends of the adjusting connecting rods are hinged to the bottom of the mounting plate. The bottom ends of the adjusting connecting rods are respectively hinged with a hinge seat, and each hinge seat is respectively connected with a connecting seat.

5. The comprehensive performance measuring device for road surface materials according to claim 4, wherein The driving component includes a driving motor installed on the connecting column. A driving motor is installed at the bottom of the driving motor, and the output end of the driving motor is in transmission connection with the top of the threaded sleeve through a pair of meshing gears.

6. The comprehensive performance measuring device for pavement materials according to claim 2, characterized in that, The adjusting unit includes a sliding seat slidably mounted on the mounting plate, and a guiding groove matching the sliding seat is further formed on the mounting plate. The sliding seat is fixedly mounted on the first moving seat or the second moving seat, and the lower half of the connecting seat is inserted into the sliding seat and can slide. Two adjusting inserts are symmetrically arranged on both sides of the sliding seat. The adjusting inserts are slidably mounted in the sliding seat. A connecting hole matching the adjusting insert is further arranged on the connecting seat. A plurality of positioning holes matching the adjusting insert are formed on the side wall of the guiding groove along the sliding direction of the adjusting insert. A moving component is further arranged in the sliding seat. The moving component is connected with the adjusting insert and is used for adjusting the connection state between the adjusting insert, the connecting seat and the mounting plate. When the moving component works, each adjusting insert will be inserted into the connecting hole on the connecting seat. When the moving component does not work, the adjusting insert will disengage from the connecting hole, and the end of the adjusting insert away from the connecting seat will be inserted into the positioning hole.

7. The pavement material comprehensive performance measuring device according to claim 6, characterized in that, The moving component includes a return spring and an electromagnet mounted in the sliding seat. Each adjusting insert is connected with the inside of the sliding seat through a return spring, and an electromagnet is correspondingly arranged at each adjusting insert. When the electromagnet does not work, the return spring will be in an extended state, and the adjusting insert will be inserted into the positioning hole. When the electromagnet works, the return spring will be in a contracted state, and the adjusting insert will be inserted into the connecting hole.

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