阅读说明：本技术 一种模拟路面标线磨损的车轮组件 (Wheel assembly for simulating wear of pavement markings ) 是由 朱建新 倪耀中 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种模拟路面标线磨损的车轮组件,旨在提供一种能模拟汽车高速转弯时车轮对标线磨损工况的模拟路面标线磨损的车轮组件。它包括机架和若干根立柱,立柱的一侧设有车轮本体,车轮本体与立柱转动连接,立柱上设有若干块相互平行的连接杆,立柱通过连接杆与机架活动连接,机架位于立柱相对应的另一侧,机架上设有气缸一,气缸一位于立柱的端部,气缸一的一端与机架转动连接,气缸一的另一端与立柱转动连接。本发明的有益效果是：能模拟汽车高速转弯时车轮对标线磨损工况；有利于提高车轮本体对标线的滚动磨损和滑动磨损的精准度；有利于车轮能够对标线进行连续测试,且占地面积小。(The invention discloses a wheel assembly for simulating wear of a road marking, and aims to provide a wheel assembly for simulating wear of the road marking, which can simulate the wear condition of wheels on the marking when an automobile turns at a high speed. The wheel comprises a rack and a plurality of stand columns, wherein a wheel body is arranged on one side of each stand column and is rotatably connected with the stand columns, a plurality of connecting rods which are parallel to each other are arranged on each stand column, each stand column is movably connected with the rack through the connecting rods, the rack is located on the other side corresponding to the stand columns, a first air cylinder is arranged on the rack and located at the end of each stand column, one end of the first air cylinder is rotatably connected with the rack, and the other end of the first air cylinder is rotatably connected with the stand columns. The invention has the beneficial effects that: the abrasion working condition of the wheel pair marking line can be simulated when the automobile turns at a high speed; the accuracy of the wheel body on the rolling abrasion and the sliding abrasion of the marking is improved; the wheel can be used for continuously testing the marked line, and the occupied area is small.)

1. The utility model provides a wheel subassembly of simulation road surface marking wearing and tearing, characterized by, includes frame (1) and a plurality of stand (2), one side of stand (2) is equipped with wheel body (3), wheel body (3) rotate with stand (2) and are connected, be equipped with a plurality of connecting rod (4) that are parallel to each other on stand (2), stand (2) are through connecting rod (4) and frame (1) swing joint, frame (1) are located the corresponding opposite side of stand (2), be equipped with cylinder (5) on frame (1), cylinder (5) are located the tip of stand (2), the one end of cylinder (5) is rotated with frame (1) and is connected, the other end of cylinder (5) is rotated with stand (2) and is connected.

2. The wheel assembly for simulating the wear of the pavement markings according to claim 1, wherein the rack (1) is circular, a plurality of mounting beams (6) corresponding to the upright columns (2) one by one are arranged at the edge of the rack (1), the mounting beams (6) are uniformly distributed along the circumferential direction of the rack (1), the left side of each mounting beam (6) is connected with the rack (1), the upright columns (2) are positioned on the right sides of the mounting beams (6), and the upright columns (2) are movably connected with the mounting beams (6) through the connecting rods (4).

3. The wheel assembly for simulating pavement marking wear according to claim 1, wherein the connecting rods (4) are four in number, two of the connecting rods (4) are located on the front side of the mounting beam (6), the other two connecting rods (4) are located on the rear side of the mounting beam (6), one end of each connecting rod (4) is rotatably connected with the upright post (2), the other end of each connecting rod (4) is rotatably connected with the mounting beam (6), and the two connecting rods (4) on the same side surface of the mounting beam (6), the upright post (2) and the mounting beam (6) form a parallelogram structure.

4. The wheel assembly for simulating wear of pavement markings as claimed in claim 2, wherein a mounting plate (7) is arranged at the top of the mounting beam (6), the connecting rod (4) is located at the bottom of the mounting beam (6), the mounting plate (7) is perpendicular to the mounting beam (6), one end of the mounting plate (7) is fixedly connected with the right side of the mounting beam (6), the other end of the mounting plate (7) corresponds to the position of the upright column (2) and is rotatably connected with the cylinder I (5), the vertical distance from the bottom end face of the mounting beam (6) to the center of the wheel body (3) is smaller than the radius of the wheel body (3), reinforcing ribs (8) are arranged on the mounting beam (6), and the reinforcing ribs (8) are fixedly connected with the mounting beam (6) and the mounting plate (7) respectively.

5. The wheel assembly for simulating the wear of the pavement markings according to claim 1, wherein the diameter of the wheel body (3) is greater than the length of the upright post (2), a rotating shaft (9) is arranged at the center of the wheel body (3), one end of the rotating shaft (9) is rotatably connected with the wheel body (3), the other end of the rotating shaft (9) is fixedly connected with the center of the upright post (2), a second cylinder (10) is arranged on the upright post (2), the second cylinder (10) is detachably connected with the upright post (2), an elastic telescopic shaft (11) is arranged at the output end of the second cylinder (10), one end of the elastic telescopic shaft (11) is connected with the output end of the second cylinder (10), a brake block (12) is arranged at the other end of the elastic telescopic shaft (11), and a brake groove (13) matched with the brake block (12) is arranged on the wheel body (3), the shape of braking groove (13) is the arc, the arc center of braking groove (13) is located the center of wheel body (3).

6. The wheel assembly of claim 5, wherein the wheel assembly is configured to simulate wear of a pavement marking, the elastic telescopic shaft (11) comprises a shaft cylinder (14) and a shaft rod (15), one end of the shaft cylinder (14) is connected with the output end of the second air cylinder (10), the other end of the shaft cylinder (14) is fixed with a limit ring (16) matched with the shaft lever (15), one end of the shaft lever (15) penetrates through the limiting ring (16) and is positioned in the shaft barrel (14), a limiting block (17) is arranged at one end of the shaft lever (15) positioned in the shaft cylinder (14), the diameter of the limiting block (17) is larger than the inner diameter of the limiting ring (16), a spring (18) is arranged on the limiting block (17), the shaft lever (15) is elastically connected with the inner side wall of the shaft barrel (14) through a spring (18), and the other end of the shaft lever (15) is connected with the brake block (12).

7. The wheel assembly for simulating the wear of the pavement markings as claimed in claim 5, wherein a wheel seat (19) is arranged at the center of the wheel body (3), the wheel seat (19) is detachably connected with the wheel body (3), one end of the rotating shaft (9) is arranged in the wheel seat (19) and provided with a plurality of bearings (20), the rotating shaft (9) is rotatably connected with the wheel seat (19) through the plurality of bearings (20), and the brake groove (13) is arranged on the wheel seat (19).

8. The wheel assembly for simulating pavement marking wear according to claim 7, wherein the wheel seat (19) comprises a tube body (21), a cover body (22) and a flange (23), the wheel body (3) is sleeved on the tube body (21), one end of the tube body (21) is far away from the upright post (2), the other end of the tube body (21) is close to the upright post (2), the cover body (22) is detachably connected with one end of the tube body (21) far away from the upright post (2), the flange (23) is fixedly connected with one end of the tube body (21) close to the upright post (2) and forms a whole, the tube body (21) is detachably connected with the wheel body (3) through the flange (23), one side of the flange (23) is fixedly connected with the tube body (21), an oil seal seat (24) is arranged at the center of the other side corresponding to the flange (23), and the oil seal seat (24) is detachably connected with the flange (23), the center of oil blanket seat (24) is equipped with oil blanket body (25), the one end of pivot (9) runs through oil blanket body (25) and is located body (21) and rotate through a plurality of bearing (20) and be connected with body (21) respectively.

9. The wheel assembly for simulating pavement marking wear according to claim 8, wherein the brake groove (13) is located on one side of the flange (23) provided with the oil seal seat (24), the brake block (12) is made of rubber, the width of the middle of the brake block (12) is the same as that of the brake groove (13), and the width of the brake block (12) is gradually reduced from the middle to two ends.

10. The wheel assembly for simulating the wear of the road markings as claimed in claim 5, wherein the brake groove (13) is provided at both ends with unloading grooves (26) matched with the brake blocks (12), one end of each unloading groove (26) is communicated with the brake groove (13), the other end of each unloading groove (26) is closed, and the width of each unloading groove (26) is greater than the width of the middle of each brake block (12).

Technical Field

The invention relates to the technical field of wheel correlation, in particular to a wheel assembly for simulating wear of road markings.

Background

The road marking is a mark such as a line, an arrow, characters, a vertical mark, a protruding marking and a contour mark which are arranged on a road surface and provide road information, and the degree of abrasion of the road marking under the action of wheels with different loads under different road conditions and different environments is detected, so that the road marking has very important significance, and a basis is provided for the problems of a road maintenance period, a marking material, marking durability, marking construction conditions and the like; the wear condition of the wheel under different working conditions, different road conditions and different loads and the road surface is an important index for evaluating the service life of the wheel, the quality of the wheel and the like, and the wear simulation test equipment for the wheel and the marked line is established, so that the service life of the tire and the marked line can be accelerated and predicted in a laboratory, the wear condition is checked, the road test is avoided, the whole test process is safe, reliable and rapid, and the result can be quantitatively identified.

Because the automobile can produce centrifugal force when turning at a high speed, sideslip with the road surface when the wheel pressure of one side increases, and the working condition that the wheel was worn and torn to the marking when the automobile was turned at a high speed can't be simulated to current simulation experiment device.

Disclosure of Invention

The invention provides a road surface marking abrasion simulation wheel assembly capable of simulating the road surface marking abrasion condition of the wheel pair marking abrasion condition during the high-speed turning of an automobile, aiming at overcoming the defect that the conventional simulation experiment device in the prior art can not simulate the abrasion condition of the wheel pair marking during the high-speed turning of the automobile.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a wheel subassembly of simulation road surface marking wearing and tearing, it includes frame and a plurality of stands, one side of stand is equipped with the wheel body, the wheel body rotates with the stand to be connected, be equipped with the connecting rod that a plurality of blocks are parallel to each other on the stand, the stand passes through connecting rod and frame swing joint, the frame is located the corresponding opposite side of stand, be equipped with cylinder one in the frame, cylinder one is located the tip of stand, the one end of cylinder one is rotated with the frame and is connected, the other end of cylinder one rotates with the stand to be connected.

The wheel comprises a stand column and is characterized in that a wheel body is arranged on one side of the stand column and is connected with the stand column in a rotating mode, a plurality of connecting rods parallel to each other are arranged on the stand column, the stand column is movably connected with a rack through the connecting rods, the rack is located on the other side corresponding to the stand column, a first air cylinder is arranged on the rack and located at the end of the stand column, one end of the first air cylinder is connected with the rack in a rotating mode, and the other end of the first air cylinder is connected with the stand column in a rotating mode. The frame drives the wheel body to rotate under the action of the driving motor, and the wheel body rolls along the marked line so as to test the rolling abrasion of the wheel body on the marked line; the cylinder applies loading pressure to the wheel bodies, so that rolling abrasion of the wheel bodies to the marking line under different pressures can be conveniently tested, meanwhile, the wheel bodies slide to one side of the rack under the action of the connecting rods, sliding abrasion of the wheel bodies to the marking line can be conveniently tested, the working condition that the wheel bodies abrade the marking line when the high-speed turning is in a centrifugal state can be simulated, and the purpose that the working condition that the wheel bodies abrade the marking line when the automobile turns at high speed can be simulated is achieved; a plurality of connecting rods are parallel to each other, are favorable to the stand to be vertical state all the time, guarantee that the wheel body is perpendicular to road surface all the time and fully contact with the marking, are favorable to improving the rolling wear and the sliding wear's of wheel body to the marking precision.

Preferably, the shape of frame is circular, the edge of frame is equipped with a plurality of and the stand one-to-one installation roof beam, and a plurality of installation roof beams evenly distributed along the circumferencial direction of frame, the left side and the frame of installation roof beam are connected, the stand is located the right side of installation roof beam, the stand passes through connecting rod and installation roof beam swing joint. The frame drives a plurality of wheel body at the edge to be circular motion when the frame passes under driving motor's drive, and the wearing and tearing operating mode of wheel to the marking when simulating the car turn more really is favorable to the wheel to carry out continuous test to the marking simultaneously like this design, and area is little.

Preferably, the connecting rods are four in number, two of the connecting rods are located on the front side of the mounting beam, the other two connecting rods are located on the rear side of the mounting beam, one end of each connecting rod is rotatably connected with the upright column, the other end of each connecting rod is rotatably connected with the mounting beam, and the two connecting rods on the same side face of the mounting beam, the upright column and the mounting beam form a parallelogram structure. When cylinder first acts on the stand and exerts pressure to the wheel body, the parallelogram structure is favorable to the stand to be vertical state all the time, guarantees that the wheel body is perpendicular to the road surface all the time and fully contacts with the marking, is favorable to improving the rolling wear of wheel body to the marking and the precision of sliding wear.

As preferred, the top of installation roof beam is equipped with the mounting panel, the connecting rod is located the bottom of installation roof beam, mounting panel and installation roof beam mutually perpendicular, the one end of mounting panel and the right side fixed connection of installation roof beam, the other end of mounting panel and the corresponding and cylinder one rotation connection in position of stand, the bottom terminal surface of installation roof beam is less than the radius of wheel body to the perpendicular distance at wheel body center, prevents installation roof beam and ground contact for this physical stamina of wheel and marking fully contact, be equipped with the strengthening rib on the installation roof beam, be favorable to improving the connection structure intensity of mounting panel and installation roof beam, the strengthening rib respectively with installation roof beam and mounting panel fixed connection. When the end part of the first air cylinder acting on the stand column applies pressure to the wheel body, the first air cylinder is respectively in rotating connection with the mounting plate and the stand column, so that the wheel body slides towards one side of the rack under the action of the connecting rod, and the sliding abrasion of the wheel body to the marking line is conveniently tested.

As preferred, the diameter of wheel body is greater than the length of stand, is favorable to wheel body and marking abundant contact, the center of wheel body is equipped with the pivot, the one end and the wheel body of pivot rotate to be connected, the other end of pivot and the central fixed connection of stand, be equipped with cylinder two on the stand, cylinder two can be dismantled with the stand and be connected, be equipped with the elastic expansion shaft on the output of cylinder two, the one end of elastic expansion shaft is connected with the output of cylinder two, the other end of elastic expansion shaft is equipped with the brake block, be equipped with on the wheel body with brake block assorted brake groove, the shape in brake groove is the arc, the arc center in brake groove is located the center of wheel body. When the sliding abrasion of the wheel body to the marking line is required to be tested in the braking state, the cylinder II is started to enable the brake block to act on the wheel body, the elastic telescopic shaft is in the contraction state at the moment, the wheel body continues to rotate, the brake block gradually slides into the brake groove, the elastic telescopic shaft gradually extends from the original contraction state until the brake block is limited by the brake groove, and the wheel body is locked, so that the abrasion working condition of the wheel to the marking line when the automobile is braked can be simulated; the arc center of the brake groove is positioned at the center of the wheel body, so that when the wheel body rotates, the brake block can gradually slide into the brake groove.

Preferably, the elastic telescopic shaft comprises a shaft cylinder and a shaft rod, one end of the shaft cylinder is connected with the output end of the second air cylinder, the other end of the shaft cylinder is fixed with a limiting ring matched with the shaft rod, one end of the shaft rod penetrates through the limiting ring and is located in the shaft cylinder, a limiting block is arranged at one end of the shaft rod located in the shaft cylinder, the diameter of the limiting block is larger than the inner diameter of the limiting ring, a spring is arranged on the limiting block, the shaft rod is elastically connected with the inner side wall of the shaft cylinder through the spring, and the other end of the shaft rod is connected with a brake block. The two cylinders are optimally positioned between the rack and the upright column and are arranged on the side surface of the upright column, the elastic telescopic shaft penetrates through the upright column to be connected with the brake block, and the brake block and the brake groove are matched to play a locking role for the wheel body, so that the design is favorable for improving the strength of the elastic telescopic shaft and prolonging the service life of the elastic telescopic shaft.

As preferred, the center of wheel body is equipped with the wheel seat, the wheel seat can be dismantled with the wheel body and be connected, the one end of pivot is located the wheel seat and is equipped with a plurality of bearing, the pivot is rotated with the wheel seat through a plurality of bearing respectively and is connected, the groove of stopping is located the wheel seat. The rotating shaft is rotatably connected with the wheel seat through a plurality of bearings, so that friction between the rotating shaft and the rotating shaft is reduced when the wheel body rotates, and the wheel body can rotate more smoothly.

As preferred, the wheel seat includes body, the cover body and flange, wheel body cover is located on the body, the stand is kept away from to the one end of body, the other end of body is close to the stand, the cover body can be dismantled with the one end that the stand was kept away from to the body and is connected, the flange just forms an organic whole with the one end fixed connection that the body is close to the stand, the body passes through the flange and can dismantle with the wheel body and be connected, one side and the body fixed connection of flange, the corresponding opposite side center of flange is equipped with the oil blanket seat, the oil blanket seat can be dismantled with the flange and be connected, the center of oil blanket seat is equipped with the oil blanket body, the one end of pivot runs through the oil blanket body and is located the body and rotates with the body through a plurality of bearing respectively and is connected. The wheel body passes through the flange and can dismantle with the body on the wheel seat and be connected, is favorable to the experimenter to change the wheel body of different models according to the test needs and tests to be favorable to improving the precision of experimental data according to the operating mode of difference.

As preferred, the brake groove is located one side that the flange is equipped with the oil blanket seat, the brake block is made by rubber, is favorable to increasing the frictional force between brake block and the brake groove lateral wall, width in the middle of the brake block is the same with the width in brake groove, the width of brake block reduces to both ends from the centre gradually, and the design is favorable to the wheel body no matter corotation or reversal like this, and the homoenergetic plays the guide effect to the brake groove is slided into to the brake block, does benefit to the speed reduction of wheel body simultaneously.

Preferably, both ends of the brake groove are provided with unloading grooves matched with the brake blocks, one end of each unloading groove is communicated with the brake groove, the other end of each unloading groove is sealed, and the width of each unloading groove is larger than the width of the middle of each brake block. When the brake block slides into the brake groove through the end part of the brake block, the wheel body is decelerated, when the brake block slides into the unloading groove through the brake groove, the brake block is contacted with one end of the unloading groove, the wheel body is favorably completely locked and cannot continuously rotate, the width of the unloading groove is larger than that of the middle of the brake block, the brake block can exit from the unloading groove under the action of the second cylinder, and the next repeated use is facilitated.

The invention has the beneficial effects that: the abrasion working condition of the wheel pair marking line can be simulated when the automobile turns at a high speed; the accuracy of the wheel body on the rolling abrasion and the sliding abrasion of the marking is improved; the wheel can be used for continuously testing the marking line, and the occupied area is small; the abrasion working condition of the wheel pair marking line is favorably simulated when the automobile brakes; the wheel body rotates smoothly; the wheel body changing device is beneficial to experimenters to replace wheel bodies of different models to carry out experiments according to test requirements, so that the accuracy of experimental data is improved according to different working conditions; the appearance design of the brake block can play a role in guiding the brake block to slide into the brake groove no matter the wheel body rotates forwards or backwards, and meanwhile, the speed reduction of the wheel body is facilitated; the wheel body is favorable for being completely locked and cannot rotate continuously; is convenient for repeated use next time.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged view of the structure of FIG. 2 at D;

FIG. 4 is an enlarged view of the structure at E in FIG. 1;

FIG. 5 is a cross-sectional view A-A of FIG. 1;

FIG. 6 is an enlarged view of the structure at C in FIG. 5;

FIG. 7 is an enlarged view of the structure of FIG. 6 at F;

fig. 8 is a sectional view of B-B in fig. 4.

In the figure: 1. the automobile brake device comprises a rack, 2 columns, 3 wheel bodies, 4 connecting rods, 5 cylinders, 6 mounting beams, 7 mounting plates, 8 reinforcing ribs, 9 rotating shafts, 10 cylinders, 11 elastic telescopic shafts, 12 brake blocks, 13 brake grooves, 14 shaft cylinders, 15 shaft rods, 16 limiting rings, 17 limiting blocks, 18 springs, 19 wheel seats, 20 bearings, 21 pipe bodies, 22 cover bodies, 23 flanges, 24 oil seal seats, 25 oil seal bodies and 26 unloading grooves.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

In the embodiment shown in fig. 1, 2 and 3, the wheel assembly for simulating wear of the pavement marker comprises a frame 1 and a plurality of columns 2, wherein a wheel body 3 is arranged on one side of each column 2, the wheel body 3 is rotatably connected with the column 2, a plurality of parallel connecting rods 4 are arranged on the column 2, the column 2 is movably connected with the frame 1 through the connecting rods 4, the frame 1 is located on the other side corresponding to the column 2, a cylinder one 5 is arranged on the frame 1, the cylinder one 5 is located at the end of the column 2, one end of the cylinder one 5 is rotatably connected with the frame 1, and the other end of the cylinder one 5 is rotatably connected with the column 2.

As shown in fig. 1, 2 and 3, the rack 1 is circular, the edge of the rack 1 is provided with a plurality of mounting beams 6 corresponding to the upright posts 2 one by one, the mounting beams 6 are uniformly distributed along the circumferential direction of the rack 1, the left side of each mounting beam 6 is connected with the rack 1, the upright posts 2 are positioned on the right sides of the mounting beams 6, and the upright posts 2 are movably connected with the mounting beams 6 through connecting rods 4.

As shown in fig. 3 and 4, the connecting rods 4 are four in total, wherein two connecting rods 4 are located at the front side of the mounting beam 6, the other two connecting rods 4 are located at the rear side of the mounting beam 6, one end of each connecting rod 4 is rotatably connected with the upright post 2, the other end of each connecting rod 4 is rotatably connected with the mounting beam 6, and the two connecting rods 4 on the same side surface of the mounting beam 6, the upright post 2 and the mounting beam 6 form a parallelogram structure.

As shown in fig. 3, 5 and 6, a mounting plate 7 is arranged at the top of the mounting beam 6, the connecting rod 4 is located at the bottom of the mounting beam 6, the mounting plate 7 is perpendicular to the mounting beam 6, one end of the mounting plate 7 is fixedly connected with the right side of the mounting beam 6, the other end of the mounting plate 7 corresponds to the upright post 2 and is rotatably connected with the first cylinder 5, the vertical distance from the bottom end face of the mounting beam 6 to the center of the wheel body 3 is smaller than the radius of the wheel body 3, a reinforcing rib 8 is arranged on the mounting beam 6, and the reinforcing rib 8 is fixedly connected with the mounting beam 6 and the mounting plate 7 respectively.

As shown in fig. 6, fig. 7 and fig. 8, the diameter of wheel body 3 is greater than the length of stand 2, the center of wheel body 3 is equipped with pivot 9, the one end and the wheel body 3 of pivot 9 rotate to be connected, the other end of pivot 9 and the center fixed connection of stand 2, be equipped with two cylinders 10 on the stand 2, two cylinders 10 can be dismantled with stand 2 and be connected, be equipped with elastic telescopic shaft 11 on the output of two cylinders 10, the one end of elastic telescopic shaft 11 is connected with the output of two cylinders 10, the other end of elastic telescopic shaft 11 is equipped with brake block 12, be equipped with on the wheel body 3 with brake block 12 assorted brake groove 13, the shape of brake groove 13 is the arc, the arc center of brake groove 13 is located the center of wheel body 3.

As shown in fig. 7, the elastic telescopic shaft 11 includes a shaft tube 14 and a shaft rod 15, one end of the shaft tube 14 is connected with the output end of the second cylinder 10, the other end of the shaft tube 14 is fixed with a limit ring 16 matched with the shaft rod 15, one end of the shaft rod 15 penetrates through the limit ring 16 and is located in the shaft tube 14, one end of the shaft rod 15 located in the shaft tube 14 is provided with a limit block 17, the diameter of the limit block 17 is greater than the inner diameter of the limit ring 16, the limit block 17 is provided with a spring 18, the shaft rod 15 is elastically connected with the inner side wall of the shaft tube 14 through the spring 18, and the other end of the shaft rod 15 is connected with the brake block 12.

As shown in fig. 6 and 7, a wheel seat 19 is disposed at the center of the wheel body 3, the wheel seat 19 is detachably connected to the wheel body 3, one end of the rotating shaft 9 is disposed in the wheel seat 19 and is provided with a plurality of bearings 20, the rotating shaft 9 is rotatably connected to the wheel seat 19 through the plurality of bearings 20, and the brake groove 13 is disposed on the wheel seat 19.

As shown in fig. 6 and 7, the wheel seat 19 includes a tube 21, a cover 22 and a flange 23, the tube 21 is sleeved with the wheel body 3, the column 2 is far away from one end of the tube 21, the other end of the tube 21 is close to the column 2, the cover 22 and one end of the tube 21 far away from the column 2 are detachably connected, the flange 23 and one end of the tube 21 close to the column 2 are fixedly connected and integrated, the tube 21 is detachably connected with the wheel body 3 through the flange 23, one side of the flange 23 is fixedly connected with the tube 21, an oil seal seat 24 is arranged at the center of the other side corresponding to the flange 23, the oil seal seat 24 is detachably connected with the flange 23, an oil seal body 25 is arranged at the center of the oil seal seat 24, and one end of the rotating shaft 9 penetrates through the oil seal body 25 and is located in the tube 21 and is rotatably connected with the tube 21 through a plurality of bearings 20.

As shown in fig. 7 and 8, the brake groove 13 is located on the side of the flange 23 where the oil seal seat 24 is provided, the brake pads 12 are made of rubber, the width of the middle of the brake pad 12 is the same as the width of the brake groove 13, and the width of the brake pad 12 is gradually reduced from the middle to both ends.

As shown in fig. 8, both ends of the brake groove 13 are provided with unloading grooves 26 matched with the brake blocks 12, one end of each unloading groove 26 is communicated with the brake groove 13, the other end of each unloading groove 26 is closed, and the width of each unloading groove 26 is larger than the width of the middle of each brake block 12.

The machine frame 1 drives the wheel body 3 to do circular motion while transmitting by itself under the action of the driving motor, and the wheel body 3 rolls along the marked line so as to test the rolling abrasion of the wheel body 3 to the marked line; the loading pressure that cylinder 5 was implemented 3 the wheel body is 0~500Kg within range adjustable, and when cylinder 5 implemented loading pressure to 3 the wheel body, the test of being convenient for was under different pressures, and 3 rolling wearing and tearing to the marking of wheel body, meanwhile, wheel body 3 slided to one side of frame 1 under the effect of connecting rod 4, and the sliding wear of 3 to the marking of wheel body of being convenient for tests, and then can realize simulating the operating mode that wheel body 3 was worn and torn to the marking when high-speed turn is in centrifugal state.

When wheel body 3 is tested to the sliding wear of marking under the brake state as needs, two 10 starts of cylinder, two 10 make brake block 12 act on wheel body 3 through elastic telescopic shaft 11 on the cylinder, elastic telescopic shaft 11 is in the contraction state this moment, wheel body 3 continues to rotate, brake block 12 slides gradually in braking groove 13, elastic telescopic shaft 11 extends gradually by original contraction state, when the mid portion card of wheel body 3 goes into braking groove 13, wheel body 3 obtains decelerating, when brake block 12 slides in unloading groove 26 through braking groove 13, brake block 12 contacts with unloading groove 26 confined one end, wheel body 3 locks completely, the operating mode of wheel body 3 to the wearing and tearing of road marking when the simulation auto brake.

In the experimental process, the linear speed of the wheel body 3 and the rolling times of the road marking can be set through a PLC central controller, a sensor on the marking and a frequency converter on a driving motor, and the linear speed and the rolling times are displayed, printed and stored in real time through the sensor on the marking and the PLC central controller; the loading pressure on the wheel body 3 can also be set and displayed in real time through the PLC central controller, the first air cylinder 5 and the sensor on the marked line.