Pavement abrasion test device

Abstract

The invention relates to a pavement abrasion test device, and belongs to the technical field of civil engineering detection equipment. Comprising a grinding head adjusting mechanism, a reciprocating driving mechanism, a protection mechanism, a test piece loading trolley, a grinding head, a base, a side support and a control mechanism, the protection mechanism is installed at the top end of the base, the side edge support is installed on the side wall of the base, the test piece loading trolley is installed on the protection mechanism in a sliding mode, and the reciprocating driving mechanism is installed on the protection mechanism and connected with the test piece loading trolley. The grinding head adjusting mechanism is mounted on the side support and connected with the grinding head, and the grinding head is rotatably arranged above the test piece loading trolley. According to the invention, through cooperation of rotation of the grinding head and reciprocating motion of the test piece loading trolley, the destructive effect of the vehicle on the road surface during straight line or turning is accelerated and simulated, the wear condition of the road surface is visually observed, and the anti-skid ability decay rule of the road surface can be obtained in a short time indoors.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering testing equipment, and in particular to a road wear testing device. Background Art

[0002] The skid resistance of the road surface is one of the most important performance indicators that affect road traffic safety. Good skid resistance provides good adhesion between the road surface and the wheels for vehicles traveling at high speeds, reducing the occurrence of road traffic accidents. The skid resistance between the tire and the road surface is generated by the friction between them. The magnitude of this friction is related to the surface characteristics of the tire and the speed of the vehicle, as well as the road surface factors. The road surface factors are mainly the structural characteristics of the road surface and the dry and wet conditions of the road surface. At the same time, skid resistance is also a basic condition for the fast and safe operation of modern transportation.

[0003] The anti-skid performance of asphalt pavement is affected by two parts: one is the adhesion effect controlled by the microstructure, and the other is the hysteresis effect controlled by the macrostructure. The forces generated by these two effects constitute the friction between the tire and the road surface. Nowadays, it usually takes 1-2 years to obtain the law of change of the anti-skid ability of the road surface through outdoor research. This is a long time and is not conducive to quickly obtaining the theoretical data required for the test. Indoor tests can derive the law of the anti-skid performance decay of the road surface in a short time, and can well control various variables for easy analysis. Therefore, studying indoor test methods has important theoretical value for studying the long-term anti-skid performance of the road surface. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a road wear test device to solve the above problems.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a road wear testing device, comprising: a grinding head adjustment mechanism, a reciprocating drive mechanism, a protective mechanism, a specimen loading trolley, a grinding head, a base, a side support and a control mechanism; the protective mechanism is installed at the top of the base, the side support is installed on the side wall of the base, the specimen loading trolley is slidably installed on the protective mechanism, the reciprocating drive mechanism is installed on the protective mechanism and connected to the specimen loading trolley, the grinding head adjustment mechanism is installed on the side support and connected to the grinding head, the grinding head is rotatably arranged above the specimen loading trolley, and the control mechanism is connected to the grinding head adjustment mechanism and the reciprocating drive mechanism.

[0006] The beneficial effects of the present invention are as follows: the grinding head adjustment mechanism is conducive to driving the grinding head to move up and down, and to abut the grinding head against the specimen in the specimen loading trolley; the reciprocating drive mechanism is conducive to driving the specimen loading trolley to move linearly, and to cause friction loss between the specimen and the grinding head during the displacement, thereby accelerating the simulation of the damage to the road surface when the vehicle is traveling straight; when the grinding head rotates, it can also accelerate the simulation of the damage to the road surface when the vehicle is turning, so as to obtain the wear law of the specimen and the change law of the friction coefficient; the present invention has a simple structure, is easy to operate, is safe and reliable, and can obtain the decay law of the anti-skid ability of the road surface in a short time indoors, and use this as data to clarify the change of the friction coefficient of the road surface during long-term use, and can also estimate the anti-skid service life of the road surface and the time required for maintenance and rest, which has very important theoretical value for road surface research.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the grinding head adjustment mechanism includes: a slide rail, a slide plate, a driving motor, a connecting rod and a handle; the slide rail is vertically installed on the top of the side support, the slide plate is slidably connected to the slide rail, the driving motor is vertically installed on the slide plate, the top and bottom ends of the connecting rod are connected to the output shaft of the driving motor and the grinding head in a one-to-one correspondence, the handle is connected to the side wall of the slide plate, and the frequency converter in the control mechanism is connected to the driving motor.

[0009] The beneficial effect of adopting the above further scheme is that the handle is conducive to making the slide board slide up and down on the slide rail by pulling up and down, thereby driving the drive motor, the connecting rod and the grinding head to move up and down, and finally making the grinding head abut against the sample after the sample is placed in the sample loading trolley; the drive motor cooperates with the control mechanism to drive the grinding head to rotate, thereby simulating the damage to the road surface when the vehicle turns.

[0010] Furthermore, the slide rail is vertically arranged on the edge of the top end of the side support, and the drive motor is arranged on a side of the slide plate away from the slide rail.

[0011] The beneficial effect of adopting the above further solution is that the slide rail is arranged at the edge of the side support, which is conducive to preventing the drive motor, the connecting rod and the grinding head from being interfered by the side support when they move up and down.

[0012] Furthermore, the protective mechanism includes: two protective side plates, a plurality of limiting wheels and a plurality of cross beams; the two protective side plates are arranged one by one on both sides of the top of the base, the plurality of cross beams are arranged side by side between the two protective side plates and connected to the top of the base, the specimen loading trolley is slidably arranged on the protective side plates, the limiting wheels are installed on the sides of the specimen loading trolley and are rollingly connected to the protective side plates.

[0013] The beneficial effect of adopting the above further scheme is that the protective side plates and the limiting wheels are conducive to providing limits for the linear displacement of the specimen loading trolley, thereby simulating the damage to the road surface when the vehicle is traveling straight, and the crossbeam is conducive to providing support for the installation of the reciprocating drive mechanism.

[0014] Furthermore, the protective side panels are structures with an L-shaped longitudinal section, and the L-shaped openings of the two protective side panels are arranged toward the specimen loading trolley.

[0015] The beneficial effect of adopting the above further solution is that the L-shaped structure is conducive to providing support for the sliding of the specimen loading trolley and providing a limit for the linear displacement of the specimen loading trolley.

[0016] Furthermore, the specimen loading trolley is slidably arranged on the horizontal section of the protective side plate, and the plurality of limiting wheels are divided into two groups. The two groups of limiting wheels are installed one-to-one on the two side walls of the specimen loading trolley and are rollingly connected one-to-one with the vertical sections of the two protective side plates.

[0017] The beneficial effect of adopting the above further solution is that the limiting wheels cooperate with the vertical section of the protective side plate to provide a limit for the linear displacement of the specimen loading trolley on the horizontal section of the protective side plate.

[0018] Furthermore, the specimen loading trolley includes a body and a plurality of wheels; the wheels are arranged at the bottom of the body, the plurality of wheels are divided into two groups, the two groups of wheels are slidingly connected to the horizontal sections of the protective side plates in a one-to-one correspondence, and the reciprocating drive mechanism is connected to the bottom of the body.

[0019] The beneficial effect of adopting the above further solution is that the vehicle body is conducive to sliding back and forth on the horizontal section of the protective side plate through the wheels under the driving action of the reciprocating drive mechanism, thereby simulating the damage to the road surface when the vehicle is traveling straight.

[0020] Furthermore, the vehicle body is a shell structure with an open top, and the sample is arranged in the vehicle body.

[0021] The beneficial effect of adopting the above further scheme is that the sample is arranged in the vehicle body, which is conducive to the friction loss of the grinding head to the sample in the straight direction and the friction loss of the sample in the rotational direction, thereby simulating the damage to the road surface when the vehicle is driving straight or turning.

[0022] Furthermore, the reciprocating drive mechanism includes: a reciprocating motor, a gear and two racks; the reciprocating motor is installed at the bottom end of the beam, the gear is arranged above the beam, the output shaft of the reciprocating motor is connected to the gear, the two racks are arranged one by one on both sides of the bottom end of the vehicle body and mesh with the gear, and the frequency converter in the control mechanism is connected to the reciprocating motor.

[0023] The beneficial effect of adopting the above further scheme is that the reciprocating motor is conducive to driving the gear to rotate, thereby driving the rack and the specimen loading trolley connected to the rack to move back and forth along a straight line, thereby simulating the damage to the road surface when the vehicle is driving straight.

[0024] Furthermore, the control mechanism also includes a controller, and the controller is connected to the variable frequency speed regulator.

[0025] The beneficial effect of adopting the above further scheme is that the controller is conducive to controlling the operation of the variable frequency speed regulator, thereby making the reciprocating motor and the drive motor work at different speeds, and finally making the grinding head and the specimen loading trolley perform wear tests on the specimen at different speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0027] Figure 2 A cross-sectional view of a grinding head provided by an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the connection between the specimen loading trolley, the rack and the limiting wheel provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the connection between a gear and a rack provided in an embodiment of the present invention.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1. Grinding head adjustment mechanism; 2. Reciprocating drive mechanism; 3. Protection mechanism; 4. Specimen loading trolley; 5. Grinding head; 6. Base; 7. Side support; 11. Slide rail; 12. Slide plate; 13. Drive motor; 14. Connecting rod; 15. Handle; 21. Reciprocating motor; 22. Gear; 23. Rack; 31. Protection side plate; 32. Limiting wheel; 33. Crossbeam; 41. Vehicle body; 42. Wheel. DETAILED DESCRIPTION

[0032] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0033] like Figures 1 to 4As shown, a road wear test device includes: a grinding head adjustment mechanism 1, a reciprocating drive mechanism 2, a protective mechanism 3, a specimen loading trolley 4, a grinding head 5, a base 6, a side support 7 and a control mechanism; the protective mechanism 3 is installed at the top of the base 6, the side support 7 is installed on the side wall of the base 6, the specimen loading trolley 4 is slidably installed on the protective mechanism 3, the reciprocating drive mechanism 2 is installed on the protective mechanism 3 and connected to the specimen loading trolley 4, the grinding head adjustment mechanism 1 is installed on the side support 7 and connected to the grinding head 5, the grinding head 5 is rotatably arranged above the specimen loading trolley 4, and the control mechanism is connected to the grinding head adjustment mechanism 1 and the reciprocating drive mechanism 2.

[0034] The beneficial effects of the present invention are as follows: the grinding head adjustment mechanism is conducive to driving the grinding head to move up and down, and to abut the grinding head against the specimen in the specimen loading trolley; the reciprocating drive mechanism is conducive to driving the specimen loading trolley to move linearly, and to cause friction loss between the specimen and the grinding head during the displacement, thereby accelerating the simulation of the damage to the road surface when the vehicle is traveling straight; when the grinding head rotates, it can also accelerate the simulation of the damage to the road surface when the vehicle is turning, so as to obtain the wear law of the specimen and the change law of the friction coefficient; the present invention has a simple structure, is easy to operate, is safe and reliable, and can obtain the decay law of the anti-skid ability of the road surface in a short time indoors, and use this as data to clarify the change of the friction coefficient of the road surface during long-term use, and can also estimate the anti-skid service life of the road surface and the time required for maintenance and rest, which has very important theoretical value for road surface research.

[0035] Preferably, Figure 1 As shown, the grinding head adjustment mechanism 1 includes: a slide rail 11, a slide plate 12, a drive motor 13, a connecting rod 14 and a handle 15; the slide rail 11 is vertically installed on the top of the side support 7, the slide plate 12 is slidably connected to the slide rail 11, the drive motor 13 is vertically installed on the slide plate 12, the top and bottom ends of the connecting rod 14 are connected to the output shaft of the drive motor 13 and the grinding head 5 in a one-to-one correspondence, the handle 15 is connected to the side wall of the slide plate 12, and the frequency converter in the control mechanism is connected to the drive motor 13.

[0036] It should be noted that in the technical solution of the present invention, the pressure applied by the grinding head 5 on the sample is only the deadweight of the driving motor 13 and the connecting rod 14. If it is necessary to increase the pressure applied by the grinding head 5 on the sample, the working load can be increased.

[0037] The beneficial effects of adopting the above-mentioned preferred scheme are: the handle is conducive to making the slide board slide up and down on the slide rail by pulling up and down, thereby driving the drive motor, the connecting rod and the grinding head to move up and down, and finally making the grinding head abut against the sample after the sample is placed in the specimen loading trolley; the drive motor cooperates with the control mechanism to drive the grinding head to rotate, thereby simulating the damage to the road surface when the vehicle turns.

[0038] Preferably, Figure 1 As shown, the slide rail 11 is vertically arranged on the edge of the top end of the side support 7 , and the drive motor 13 is arranged on a side of the slide plate 12 away from the slide rail 11 .

[0039] The beneficial effect of adopting the above preferred solution is that the slide rail is arranged at the edge of the side support, which is conducive to preventing the drive motor, the connecting rod and the grinding head from being interfered by the side support when they move up and down.

[0040] Preferably, Figure 1 As shown, the protection mechanism 3 includes: two protection side plates 31, a plurality of limiting wheels 32 and a plurality of cross beams 33; the two protection side plates 31 are arranged one by one on both sides of the top of the base 6, the plurality of cross beams 33 are arranged side by side between the two protection side plates 31, and are connected to the top of the base 6, the specimen loading trolley 4 is slidably arranged on the protection side plates 31, the limiting wheels 32 are installed on the sides of the specimen loading trolley 4, and are rollingly connected to the protection side plates 31.

[0041] The beneficial effects of adopting the above preferred scheme are: the protective side plates and the limiting wheels are conducive to providing limits for the linear displacement of the specimen loading trolley, thereby simulating the damage to the road surface when the vehicle is traveling straight, and the crossbeam is conducive to providing support for the installation of the reciprocating drive mechanism.

[0042] Preferably, Figure 1 As shown, the protective side plate 31 is a structure with an L-shaped longitudinal section, and the L-shaped openings of the two protective side plates 31 are arranged toward the specimen loading trolley 4 .

[0043] The beneficial effect of adopting the above preferred solution is that the L-shaped structure is conducive to providing support for the sliding of the specimen loading trolley and providing a limit for the linear displacement of the specimen loading trolley.

[0044] Preferably, Figure 1 and Figure 3 As shown, the specimen loading trolley 4 is slidably set on the horizontal section of the protective side plate 31, and the multiple limiting wheels 32 are divided into two groups. The two groups of limiting wheels 32 are installed one-to-one on the two side walls of the specimen loading trolley 4, and are rollingly connected to the vertical sections of the two protective side plates 31 one-to-one.

[0045] The beneficial effect of adopting the above preferred solution is that the limiting wheels cooperate with the vertical section of the protective side plate to provide a limit for the linear displacement of the specimen loading trolley on the horizontal section of the protective side plate.

[0046] Preferably, Figure 1 As shown, the specimen loading trolley 4 includes a body 41 and a plurality of wheels 42; the wheels 42 are arranged at the bottom of the body 41, and the plurality of wheels 42 are divided into two groups, and the two groups of wheels 42 are slidingly connected to the horizontal section of the protective side plate 31 in a one-to-one correspondence, and the reciprocating drive mechanism 2 is connected to the bottom end of the body 41.

[0047] The beneficial effect of adopting the above preferred solution is that the vehicle body is conducive to sliding back and forth on the horizontal section of the protective side plate through the wheels under the driving action of the reciprocating drive mechanism, thereby simulating the damage to the road surface when the vehicle is driving straight.

[0048] Preferably, the vehicle body 41 is a shell structure with an open top, and the sample is arranged inside the vehicle body 41 .

[0049] Among them, it should be noted that: Figure 1 In order to make the structure at the bottom of the vehicle body 41 more clearly visible, the bottom plate of the vehicle body 41 is hidden.

[0050] The beneficial effect of adopting the above preferred solution is that the sample is set in the vehicle body, which is conducive to the friction loss of the grinding head to the sample in the straight direction and the friction loss of the sample in the rotational direction, thereby simulating the damage to the road surface when the vehicle is driving straight or turning.

[0051] Preferably, Figure 1 and Figure 4 As shown, the reciprocating drive mechanism 2 includes: a reciprocating motor 21, a gear 22 and two racks 23; the reciprocating motor 21 is installed at the bottom end of the beam 33, the gear 22 is arranged above the beam 33, the output shaft of the reciprocating motor 21 is connected to the gear 22, the two racks 23 are arranged one by one on both sides of the bottom end of the vehicle body 41, and mesh with the gear 22, and the frequency converter in the control mechanism is connected to the reciprocating motor 21.

[0052] The beneficial effect of adopting the above preferred solution is that the reciprocating motor is conducive to driving the gear to rotate, thereby driving the rack and the specimen loading trolley connected to the rack to move back and forth along a straight line, thereby simulating the damage to the road surface when the vehicle is driving straight.

[0053] Preferably, the control mechanism further includes a controller, and the controller is connected to the variable frequency speed regulator.

[0054] The beneficial effect of adopting the above preferred scheme is that the controller is conducive to controlling the operation of the variable frequency speed regulator, thereby making the reciprocating motor and the drive motor work at different speeds, and finally making the grinding head and the specimen loading trolley perform wear tests on the specimen at different speeds.

[0055] In the experimental process of the technical solution of the present invention, A represents the number of actions within 60s, t represents the test time, μ represents the road friction coefficient, V represents the design speed of the secondary road when turning, F represents the centrifugal force of the vehicle turning during the experiment, G represents gravity, and assuming that t=60 seconds, μ=0.75, V=60 kilometers per hour, the minimum turning radius R=600 meters, and the pressing weight of the grinding head 5 without counterweight is 14.6 kilograms, G=mg=14.6*9.8=143.08N;

[0056] When simulating the damage to the road surface caused by a vehicle traveling straight ahead, the vertical impulse I1=μ*G*t*A=0.75*143.08*60*22;

[0057] When simulating the damage to the road surface caused by vehicle turning, the vertical impulse I2 = μ*G*t*A = 0.75*143.08*60*170;

[0058] The centrifugal force F of the vehicle turning during the experiment is GV 2 / gR=676N;

[0059] Transverse impulse I3 = μ*F*t*A = 0.75*676*60*170;

[0060] From this we can see that:

[0061] I2=7.727I1;

[0062] I 3 = 36.509I 1;

[0063] Therefore, the impulse to which the specimen is subjected when simulating the damage to the road surface caused by a vehicle turning can be up to 36 times the impulse to which the specimen is subjected when simulating the damage to the road surface caused by a vehicle traveling straight.

[0064] The working process of the present invention is described below:

[0065] like Figures 1 to 4 As shown, when it is necessary to simulate the damage to the road surface caused by a vehicle driving straight, the handle 15 is first pulled upward to move the slide plate 12 upward on the slide rail 11, thereby driving the drive motor 13, the connecting rod 14 and the grinding head 5 to move upward;

[0066] Next, the specimen is placed in the specimen loading trolley 4, and the handle 15 is lowered to move the grinding head 5 downward until it contacts the specimen;

[0067] Then, the reciprocating motor 21 is started by the controller to make the reciprocating motor 21 rotate forward and reverse, and the reciprocating motor 21 drives the gear 22 to rotate forward and reverse, and the gear 22 is engaged with the rack 23 to drive the specimen loading trolley 4 to move back and forth along the horizontal section of the protective side plate 31. In this process, the grinding head 5 continuously wears the specimen back and forth in a straight line direction, so that the wear condition of the road surface within a certain period of time can be intuitively observed, and the wear amount law of the specimen and the change law of the friction coefficient can be obtained.

[0068] When it is necessary to simulate the damage to the road surface caused by vehicle turning, on the basis of the above operations, the driving motor 13 is started by the controller, and the driving motor 13 drives the grinding head 5 to rotate through the connecting rod 14. The grinding head 5 can then perform rotational friction on the sample, and then the wear of the road surface within a certain period of time can be intuitively observed, and the wear amount law of the specimen and the change law of the friction coefficient can be obtained.

[0069] It should be noted that: during the above operation, the speed of the driving motor 13 can be adjusted by the variable frequency speed regulator, and then the speed of the grinding head 5 can be adjusted, so as to test the wear law of the test piece and the change law of the friction coefficient at different turning speeds. At the same time, the speed of the reciprocating motor 21 can be adjusted by the variable frequency speed regulator, and then the reciprocating movement speed of the test piece loading trolley 4 can be adjusted, so as to test the wear law of the test piece and the change law of the friction coefficient at different straight-line driving speeds.

[0070] During the above operation, the damage to the road surface caused by the vehicle going straight and the damage to the road surface caused by the vehicle turning are simulated. The simulation can be performed separately by starting only the reciprocating motor 21 and only the driving motor 13, or the simulation can be performed simultaneously by starting both the reciprocating motor 21 and the driving motor 13.

[0071] The present invention only adopts a simple mechanical structure. Through the cooperation between the rotating friction head and the specimen loading trolley, it can simulate the destructive effect of vehicles on the road surface, that is, the wear of the road surface can be observed intuitively, and the decay law of the anti-skid ability of the road surface can be obtained indoors in a short time, and the change of the friction coefficient of the road surface during long-term use can be clarified. It can also estimate the anti-skid service life of the road surface and the time required for maintenance and rest, which has important theoretical value for road surface research.

[0072] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A road wear test device, characterized in that: include: A grinding head adjustment mechanism (1), a reciprocating drive mechanism (2), a protection mechanism (3), a specimen loading trolley (4), a grinding head (5), a base (6), a side support (7) and a control mechanism; The protective mechanism (3) is mounted on the top of the base (6), the side support (7) is mounted on the side wall of the base (6), the specimen loading trolley (4) is slidably mounted on the protective mechanism (3), the reciprocating drive mechanism (2) is mounted on the protective mechanism (3) and connected to the specimen loading trolley (4), the grinding head adjustment mechanism (1) is mounted on the side support (7) and connected to the grinding head (5), the grinding head (5) is rotatably arranged above the specimen loading trolley (4), and the control mechanism is connected to the grinding head adjustment mechanism (1) and the reciprocating drive mechanism (2).

2. A road wear test device according to claim 1, characterized in that: The grinding head adjustment mechanism (1) comprises: a slide rail (11), a slide plate (12), a drive motor (13), a connecting rod (14) and a handle (15); the slide rail (11) is vertically mounted on the top of the side support (7); the slide plate (12) is slidably connected to the slide rail (11); the drive motor (13) is vertically mounted on the slide plate (12); the top and bottom ends of the connecting rod (14) are connected to the output shaft of the drive motor (13) and the grinding head (5) in a one-to-one correspondence; the handle (15) is connected to the side wall of the slide plate (12); and the variable frequency speed regulator in the control mechanism is connected to the drive motor (13).

3. A road wear test device according to claim 2, characterized in that: The slide rail (11) is vertically arranged on the edge of the top end of the side support (7), and the drive motor (13) is arranged on a side of the slide plate (12) away from the slide rail (11).

4. A road wear test device according to claim 1, characterized in that: The protection mechanism (3) comprises: two protection side plates (31), a plurality of limiting wheels (32) and a plurality of cross beams (33); the two protection side plates (31) are arranged one by one on both sides of the top of the base (6); the plurality of cross beams (33) are arranged side by side between the two protection side plates (31) and connected to the top of the base (6); the specimen loading trolley (4) is slidably arranged on the protection side plates (31); the limiting wheels (32) are installed on the sides of the specimen loading trolley (4) and are rollingly connected to the protection side plates (31).

5. A road wear test device according to claim 4, characterized in that: The protective side plates (31) are of an L-shaped structure in longitudinal cross-section, and the L-shaped openings of the two protective side plates (31) are arranged toward the specimen loading trolley (4).

6. A road wear test device according to claim 5, characterized in that: The specimen loading trolley (4) is slidably arranged on the horizontal section of the protective side plate (31), and the plurality of limiting wheels (32) are divided into two groups. The two groups of limiting wheels (32) are mounted on the two side walls of the specimen loading trolley (4) in a one-to-one correspondence, and are rollingly connected to the vertical sections of the two protective side plates (31) in a one-to-one correspondence.

7. A road wear test device according to claim 5, characterized in that: The specimen loading trolley (4) comprises a vehicle body (41) and a plurality of wheels (42); the wheels (42) are arranged at the bottom end of the vehicle body (41), the plurality of wheels (42) are divided into two groups, the two groups of wheels (42) are slidably connected to the horizontal section of the protective side plate (31) in a one-to-one correspondence, and the reciprocating drive mechanism (2) is connected to the bottom end of the vehicle body (41).

8. A road wear test device according to claim 7, characterized in that: The vehicle body (41) is a shell structure with an open top, and the sample is arranged in the vehicle body (41).

9. A road wear test device according to claim 7, characterized in that: The reciprocating drive mechanism (2) comprises: a reciprocating motor (21), a gear (22) and two racks (23); the reciprocating motor (21) is mounted at the bottom end of the crossbeam (33), the gear (22) is arranged above the crossbeam (33), the output shaft of the reciprocating motor (21) is connected to the gear (22), the two racks (23) are arranged one by one on both sides of the bottom end of the vehicle body (41) and mesh with the gear (22), and the variable frequency speed regulator in the control mechanism is connected to the reciprocating motor (21).

10. A road wear test device according to claim 9, characterized in that: The control mechanism also includes a controller, and the controller is connected to the variable frequency speed regulator.

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