CN211347794U - Tram running surface coating performance test equipment - Google Patents

Abstract

The utility model discloses a performance testing device for the running surface coating of a tram. The testing device for the coating performance of the tram running surface comprises: a base: a rotating tray, which is rotatably arranged on the base; a coating sample plate , the coated sample plate is set on the rotating tray, and the coated sample plate has a test plane; the loading device, the loading device is set on the base; the wheel, the wheel is installed on the loading device, and the loading device applies force to the wheel to adjust the pressure of the wheel on the test plane ; Driving device, the driving device drives the rotating tray to rotate; the pressure detection system, the pressure detection system detects the force exerted by the loading device and the pressure of the wheel on the test plane; the angular velocity detection system, the angular velocity detection system detects the angular velocity of the wheel and the angular velocity of the rotating tray. The testing equipment for the performance of the coating on the running surface of the tram according to the embodiment of the present invention can improve the coating quality of the coated sample plate, and the test conditions are more in line with the actual working conditions, and the accuracy of the test results can be improved.

Description

Tram running surface coating performance test equipment

technical field

The utility model relates to the field of tramcar testing, in particular to a performance testing device for the running surface coating of tramcars.

Background technique

The coating wear test is based on the pressure value per unit area of the train running track surface and the speed of the vehicle equipment operation, calculating the number of rotations of the coating track surface, and converting it into an hourly simulation of the wear condition of the coating when the train is running. As shown in FIG. 1 , the coating wear test equipment 1 ′ in the related art, the coating sample 300 ′ is set on the outer surface of the cylinder 310 ′, so the construction of the anti-skid layer is difficult and the quality is difficult to be guaranteed. In addition, the radius of the cylinder 310' is small, and it is in line contact with the wheel 500', and the contact area is small, which cannot simulate the tire deformation and the contact surface between the tire and the anti-skid layer when the vehicle is running.

In addition, the wheel 500' mainly relies on the friction with the sample to drive the sample to rotate. In this way, only rolling friction can be formed between the wheel 500' and the coated sample 300', and the static friction and sliding of the vehicle cannot be completely simulated. Friction conditions, as well as the conditions of the vehicle in the rain and the slip rate of the vehicle.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, one purpose of the present utility model is to propose a performance testing device for the running surface coating of trams, which can improve the coating quality of the coating sample plate and make the test conditions more in line with the test conditions. The actual working conditions can improve the accuracy of the test results.

In order to achieve the above purpose, according to an embodiment of the present utility model, a performance testing device for the running surface coating of trams is proposed. rotatably arranged on the base; a coating sample plate, the coating sample plate is arranged on the rotating tray and rotates with the rotating tray, the coating sample plate has a test plane; a loading device, the loading A device is provided on the base; a wheel, the wheel is mounted on the loading device, the loading device applies a loading force to the wheel to adjust the pressure of the wheel on the test plane; a driving device, the driving device The device is connected to the rotating tray to drive the rotating tray to rotate; a pressure detection system, the pressure detection system detects the loading force exerted by the loading device and the pressure of the wheel on the test plane; an angular velocity detection system, the The angular velocity detection system detects the angular velocity of the wheel and the angular velocity of the rotating tray.

According to the testing equipment for the performance of the coating on the running surface of the tram according to the embodiment of the present invention, by setting the coating sample plate into a plate shape and setting the test plane as a plane, compared with the related art, the coating test is arranged on the outer surface of the cylinder. In this way, it is less difficult to set the coating on the flat surface and the quality is better.

Moreover, surface contact is formed between the wheel and the test plane, which can better simulate the tire deformation and the contact between the tire and the running surface when the vehicle is running, and because of the surface contact, not only rolling friction can be formed between the wheel and the test plane, It can also simulate the static friction and sliding friction when the vehicle is running, so as to simulate the driving situation of the vehicle more realistically, thereby improving the accuracy of the test results, that is, the calculated slip coefficient conforms to the actual working conditions, and the resistance of the coating is tested Abrasion and frequency of vehicle tire replacement.

The testing equipment for the coating performance of the running surface of the tram according to the embodiment of the present invention can improve the coating quality of the coating sample plate, and the test conditions are more in line with the actual working conditions, thereby improving the accuracy of the test results.

In addition, the performance testing equipment for the running surface coating of the tram according to the embodiment of the present invention may also have the following technical features:

According to some specific implementations of the present invention, the loading device includes: a loading bracket, which is mounted on the base; a loading screw, which is threadedly matched to the loading bracket; The assembly is mounted on the loading bracket movably up and down, the wheel and the driving device are mounted on the sliding assembly, and the loading screw is rotated to press down the sliding assembly.

Further, the sliding assembly includes: a sleeve, the loading bracket is provided with a mandrel, the sleeve is sleeved on the mandrel so as to be movable up and down, and the loading screw is rotated to press down on the mandrel. The sleeve; the support beam, the support beam is provided with a fixing block, the fixing block is threadedly fitted with the sleeve and moves up and down with the sleeve, and the wheel and the driving device are installed on the support beam.

Further, the sliding assembly further includes: a slider, a limit rod is arranged on the loading bracket, the slider is movably fitted with the mandrel and the limit rod and is located above the sleeve , the loading screw presses the sliding block downward by rotating to press the sleeve; the pressure detection system includes a loading pressure sensor, and the loading pressure sensor is arranged on the upper surface of the sliding block and located at Between the slider and the loading screw, the loading force of the loading screw to the slider is detected.

Further, the loading support comprises: a column, the column is installed on the base; an upper beam, the upper beam is installed on the column, and the loading screw thread is matched with the upper beam; a lower beam, the The lower beam is installed on the upright column and located below the upper beam, and the mandrel and the limit rod are arranged between the upper beam and the lower beam.

According to some specific implementations of the present invention, the driving device includes: a transmission installed on the support beam; a motor installed on the transmission, and the motor is connected to the rotating tray through the transmission to The rotating tray is driven to rotate.

Further, the angular velocity detection system includes: a wheel angular velocity sensor, which is arranged on the axle of the wheel to detect the angular velocity of the wheel; a pallet angular velocity sensor, which is arranged on the The connecting shaft of the transmission and the rotating tray is used to detect the angular velocity of the rotating tray.

According to some specific implementations of the present invention, the base is provided with a plurality of rotatable ground rollers, the plurality of rollers are arranged at intervals along the circumference of the rotating tray, and the rotating tray is supported on the plurality of the rollers .

According to some specific implementations of the present invention, the coating sample plate extends along the entire circumference of the rotating tray; or there are multiple coating sample plates, and a plurality of the coating sample plates rotate along the rotating tray. Circumferential arrangement of the trays over the entire circumference.

According to some implementations of the present invention, the pressure detection system includes a load pressure sensor provided between the rotating tray and the coated sample plate, for detecting the wheel to the test plane pressure.

Description of drawings

The above-mentioned advantages of the present invention will become apparent and easily understood in the description of the embodiments in conjunction with the following drawings, wherein:

FIG. 1 is a schematic structural diagram of a performance testing device for a running surface coating of a tram in the prior art.

FIG. 2 is a schematic structural diagram of a performance testing device for a tram running surface coating according to an embodiment of the present invention.

3 is a schematic structural diagram of a base and a loading device of a tramcar running surface coating performance testing equipment according to an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of the driving device of the tramcar running surface coating performance testing equipment according to an embodiment of the present invention.

FIG. 5 is a schematic structural diagram of the rotating tray of the equipment for testing the performance of the coating on the running surface of the tram according to an embodiment of the present invention.

Reference number:

Tram running surface coating performance test equipment 1.

The base 100, the roller 110,

Rotary tray 200,

Coated sample plate 300, test plane 310,

Loading device 400, loading bracket 410, mandrel 411, limit rod 412, upright column 413, upper beam 414, lower beam 415, loading screw 420, sliding assembly 430, sleeve 431, support beam 432, fixed block 433, slider 434, wheel 500,

Drive device 600, transmission 610, motor 620,

Load pressure sensor 700,

Angular velocity detection system 800 , wheel angular velocity sensor 810 , pallet angular velocity sensor 820 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "vertical", "horizontal", "axial", "diameter" The orientation or positional relationship indicated by "direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present invention, the meaning of "plurality" is two or more, and the meaning of "several" is one or more.

The following describes a performance testing device 1 for a tram running surface coating according to an embodiment of the present invention with reference to the accompanying drawings.

As shown in Fig. 2-Fig. 5, the test equipment 1 for the coating performance of the running surface of the tram includes a base 100, a rotating tray 200, a coating sample plate 300, a loading device 400, a wheel 500, a driving device 600, a pressure detection system and Angular velocity detection system 800 .

The rotating tray 200 is rotatably provided on the base 100 . The coating sample plate 300 is disposed on the rotating tray 200 and rotates with the rotating tray 200 . The coating sample plate 300 has a test plane 310 , wherein the coating can be a non-slip layer on the running surface of the tram. The loading device 400 is provided on the base 100 . The wheel 500 is installed on the loading device 400, the tires set on the wheel 500 can be rubber tires, and the wheel 500 can have a built-in tire pressure monitoring system to ensure that the tire pressure state of the tire is consistent with the actual state of the vehicle. A loading force is applied to adjust the pressure of the wheel 500 against the test plane 310 . The driving device 600 is connected with the rotating tray 200 to drive the rotating tray 200 to rotate. The pressure detection system detects the loading force exerted by the loading device 400 and the pressure of the wheel 500 on the test plane 310 . The angular velocity detection system 800 detects the angular velocity of the wheel 500 and the angular velocity of the rotating tray 200 .

After the driving device 600 drives the rotating tray 200, since the wheel 500 is pressed on the test plane 310 of the coating sample plate 300 under the action of the loading force, the wheel 500 will be driven to rotate, thereby simulating the running condition of the tram, and According to the collection of relevant data, the relevant test results are calculated. The specific basic data collection and calculation methods are known to those skilled in the art, and the more important methods in the embodiments of the present invention will be introduced later.

According to the testing equipment 1 for the performance of the coating on the running surface of the tram according to the embodiment of the present invention, by setting the coating sample plate 300 in a plate shape and setting the test plane 310 in a flat surface, compared with the related art in the outside of the cylinder 310' The coating sample 300′ is set on the surface, the difficulty of setting the coating on the plane is lower, and the quality is better.

In addition, surface contact is formed between the wheel 500 and the test plane 310, which can better simulate the tire deformation and the contact between the tire and the running surface when the vehicle is running. Forming rolling friction, it can also simulate the static friction and sliding friction when the vehicle is running, so as to more realistically simulate the driving situation of the vehicle, thereby improving the accuracy of the test results, that is, the calculated slip coefficient conforms to the actual working conditions, and the test results show Abrasion resistance of coatings and frequency of vehicle tire replacement.

Compared with the coating wear resistance test equipment 1' in the related art, the contact area, loading pressure and tire pressure of the wheel 500 and the coating sample plate 300 of the tram running surface coating performance test equipment 1 can simulate the actual driving conditions. working condition.

It can be understood by those skilled in the art that the coating sample plate 300 can be not only a non-slip layer sample, but also a composite material sample to test the wear resistance between the wheel 500 and the composite material. Of course, other adjustments can be made to the coated samples according to the needs of the test subject.

The coating performance testing device 1 for the running surface of the tram according to the embodiment of the present invention can improve the coating quality of the coated sample plate, and the test conditions are more in line with the actual working conditions, thereby improving the accuracy of the test results.

According to some specific embodiments of the present invention, as shown in FIGS. 2-3 , the loading device 400 includes a loading bracket 410 , a loading screw 420 and a sliding assembly 430 .

The loading bracket 410 is mounted on the base 100 . The loading screw 420 is screwed to the loading bracket 410 . The sliding assembly 430 is installed on the loading bracket 410 so as to be movable up and down, the wheel 500 and the driving device 600 are installed on the sliding assembly 430 , and the loading screw 420 is rotated to press down the sliding assembly 430 .

Specifically, when the loading screw 420 is rotated, since the loading screw 420 is threadedly matched with the loading bracket 410, the loading screw 420 will be displaced in the up-down direction, so as to adjust the loading force applied to the sliding assembly 430. For example, the loading screw 420 rotates to When moving downward, the sliding component 430 is pressed downward, the sliding component 430 moves downward, and drives the wheel 500 to move downward, thereby increasing the pressure of the wheel 500 on the test plane 310 . If the loading force is reduced, the loading screw 420 can be rotated in the opposite direction.

In this way, the pressure of the wheel 500 on the coating sample plate 300 can be adjusted by the loading screw 420 to simulate the actual pressure between the wheel 500 and the coating sample plate 300 in the driving condition.

Further, as shown in FIGS. 2-3 , the sliding assembly 430 includes a sleeve 431 and a support beam 432 .

The loading bracket 410 is provided with a mandrel 411 extending in the up-down direction, the sleeve 431 is sleeved on the mandrel 411 so as to be movable up and down, and the loading screw 420 presses the sleeve 431 downward by rotating. The support beam 432 is provided with a fixing block 433 . The fixing block 433 is screwed to the sleeve 431 and moves up and down with the sleeve 431 . The wheel 500 and the driving device 600 are installed on the support beam 432 .

When the loading screw 420 rotates and moves downward, the sleeve 431 is pushed down along the mandrel 411 to drive the fixed block 433 and the support beam 432 connected to the sleeve 431 to move downward, thereby driving the wheel 500 to press down on the test plane. 310. The mandrel 411 provides a sliding guide for the sleeve 431, the support beam 432 provides positioning and support for the wheel 500 and the driving device 600, and the position of the fixed block 433 is close to the wheel 500, so as not to interfere with the rotation of the wheel 500, but also to ensure The loading force of the loading screw 420 is mainly applied to the wheel 500, which further reduces the power consumption.

Further, as shown in FIGS. 2-3 , the sliding assembly 430 further includes a sliding block 434 .

The loading bracket 410 is provided with a limit rod 412, the slider 434 can move up and down to fit the mandrel 411 and the limit rod 412, and the slider 434 is located above the sleeve 431 and is supported by the sleeve 431, and the loading screw 420 rotates to Press the slider 434 downward to press the sleeve 431 .

Specifically, the pressure detection system includes a loading pressure sensor (not shown in the figure), wherein the loading pressure sensor can be a secondary pressure sensor, and the loading pressure sensor is provided on the upper surface of the slider 434 and located between the slider 434 and the loading screw 420 is used to detect the loading force of the loading screw 420 on the slider 434 .

In this way, the loading screw 420 pushes the sleeve 431 by pushing the slider 434, and the slider 434 is set to load the load provided by the pressure sensor. When the loading screw 420 pushes the slider 434, the loading pressure sensor can accurately detect the magnitude of the current loading force. It is further convenient to control the magnitude of the applied loading force to simulate the loading pressure of the tire tire pressure and the load of the vehicle on the wheel during the actual vehicle operation. In addition, compared with the method of arranging the loading pressure sensor at the bottom of the sliding assembly 430, due to the large vibration at the bottom, the sliding block 434 is used to fix the loading pressure sensor on the top, which can reduce the interference of other factors such as vibration, thereby improving the resistance to vibration. The accuracy of loading force detection.

Further, as shown in FIGS. 2-3 , the loading bracket 410 includes a column 413 , an upper beam 414 and a lower beam 415 .

The upright column 413 extends in the up-down direction and is installed on the base 100 . The upper beam 414 extends in the horizontal direction and is installed on the upright column 413 , and the loading screw 420 is screwed to the upper beam 414 . The lower beam 415 extends in the horizontal direction and is installed on the upright column 413 . The lower beam 415 is located below the upper beam 414 . In this way, the structure of the loading bracket 410 is stable, and the position of the loading screw 420 is located above the upper beam 414 , which facilitates the adjustment of the loading force of the loading screw 420 .

Specifically, there may be four uprights 413 , two upper crossbeams 414 and two lower crossbeams 415 respectively, a pair of upper crossbeams 414 and lower crossbeams 415 are disposed on the two uprights 413 , and another pair of upper crossbeams 414 and lower crossbeams 415 The two upper beams 414 can be connected by connecting beams extending in the horizontal direction, so that the loading bracket 410 forms a substantially square structure. In order to simulate the driving situation of the vehicle more realistically, two wheels 500 are provided and installed on both ends of the support beam 432 respectively. Block 434, loading pressure sensor and limit rod 412 and other supporting structures.

More specifically, for the supporting structure of each end of the support beam 432, there can be two mandrels 411 located on both sides of the support beam 432, each mandrel 411 is provided with a sleeve 431, and correspondingly, the support beam 432 There are fixed blocks 433 which cooperate with the two sleeves 431 on both sides of the end of the . There can also be two limit rods 412, which are located on both sides of the two mandrels 411, respectively, and one slider 434. The slider 434 is passed through the two mandrels 411 and the two limit rods 412 and supported on the on both sleeves 431. Two loading screws 420 may be provided on the upper beam 414 on the slider 434 , and the two loading screws 420 apply a loading force to the slider 434 evenly.

Therefore, not only can the running conditions of the tram be simulated more realistically to further improve the accuracy of the test results, but also the overall structure and movement of the tram running surface coating performance testing device 1 are more stable.

According to some specific embodiments of the present invention, as shown in FIGS. 2 and 4 , the driving device 600 includes a transmission 610 and a motor 620 . The transmission 610 is mounted to the support beam 432 . The motor 620 is mounted on the transmission 610, and the motor 620 is connected with the rotating tray 200 through the transmission 610 to drive the rotating tray 200 to rotate.

Specifically, the motor 620 drives the transmission 610 , and the computer controls the angular velocity and corresponding torque output from the transmission 610 , and the transmission 610 outputs torque to the rotating tray 200 to drive the rotating tray 200 to rotate. In this way, the performance testing equipment 1 for the running surface coating of the tram can realize programming control according to the actual working conditions of the vehicle, and run automatically within a corresponding time. In addition, the transmission 610 can simulate the running speed of the vehicle under different working conditions, control the rotating tray 200 to rotate at different angular speeds, and test the replacement cycle of the vehicle tires under different working conditions.

In addition, the wheel 500 is in contact with the test plane 310, and the loading device 400 applies an adjustable loading force to the wheel 500, which can completely simulate the wear of the anti-skid layer of the wheel 500 under the load condition of the vehicle, and rely on the motor 620 and the transmission 610 to simulate The displacement of the wheel 500 under the normal driving and braking conditions of the vehicle in sunny and rainy days (which can be simulated by spraying water on the test plane 310), the driving conditions of the tire and the anti-skid layer are consistent with the static friction, rolling friction and sliding friction during driving. Therefore, the calculated slip coefficient is in line with the actual working conditions, and the wear resistance of the anti-skid layer and the frequency of vehicle tire replacement are tested.

Further, as shown in FIGS. 2 and 4 , the angular velocity detection system 800 includes a wheel angular velocity sensor 810 and a pallet angular velocity sensor 820 . The wheel angular velocity sensor 810 is disposed on the axle of the wheel 500 to detect the angular velocity of the wheel 500 , wherein each wheel 500 is provided with a corresponding wheel angular velocity sensor 810 . The tray angular velocity sensor 820 is disposed on the connecting shaft of the transmission 610 and the rotating tray 200 , and is used for the angular velocity of the rotating tray 200 .

Specifically, when the rotating tray 200 rotates, the pair of wheels 500 can be driven to rotate around the axis by the frictional force with the wheels 500 . The angular velocity of the rotation of the wheel 500 can be collected by the wheel angular velocity sensor 810, and the angular velocity of the pallet rotation 200 can be collected by the pallet angular velocity sensor 820. According to the above data collection, the corresponding linear velocity and the travel distance of the wheel 500 and the rotation of the rotating tray 200 are calculated. The ratio of the distances, and then the slip rate of the wheel 500 is calculated.

According to some specific embodiments of the present invention, as shown in FIGS. 2 and 3 , the base 100 is provided with a plurality of rotatable ground rollers 110 , and the plurality of rollers 110 are arranged at intervals along the circumferential direction of the rotating tray 200 , and the rotating tray 200 supports on multiple rollers 110 .

For example, the rollers 110 may be arranged at the outer periphery of the rotating tray 200 at equal intervals, and the bearings of the rollers 110 are arranged along the radial direction of the rotating tray 200 . In this way, the rollers 110 can not only make the circumferential rotation of the rotating tray 200 smoother, but also support the outer periphery of the rotating tray 200 to ensure the stability of the rotating tray 200 during rotation and pressure bearing.

According to some specific embodiments of the present invention, as shown in FIG. 2 and FIG. 5 , the coating sample plate 300 extends for the entire circumference along the circumferential direction of the rotating tray 200 , or there are multiple coating sample plates 300 . The template 300 is arranged along the entire circumference of the rotating tray 200 .

For example, the coating sample plate 300 can be an integral ring, or a plurality of coating sample plates 300 can be formed into a ring, and the outer diameter of the ring can be the same as the diameter of the rotating tray 200 .

In this way, multiple (for example, eight) different coating sample plates 300 can be placed on the rotating tray 200 for testing at the same time. Wear resistance.

According to some specific embodiments of the present invention, as shown in FIG. 2 and FIG. 5 , the pressure detection system further includes a load pressure sensor 700 . The load pressure sensor 700 is arranged between the rotating tray 200 and the coating sample plate 300 . It is used to detect the pressure of the wheel 500 on the test plane 310 . In this way, during the operation of the tram running surface coating performance testing device 1, the load pressure sensor 700 can monitor the pressure of the wheel 500 on the coating sample plate 300 to ensure that the pressure is the same as the pressure of the wheel on the track under the actual vehicle operating conditions. Consistent.

The performance testing device 1 for the running surface coating of the tram according to the embodiment of the present invention can completely simulate the wear of the anti-skid layer of the vehicle tire under the load condition of the vehicle, and rely on the transmission 610 to simulate the normal running of the vehicle in sunny and rainy days. and the wheel displacement under braking conditions, calculate the slip coefficient, and test the wear resistance of the anti-skid layer and the frequency of vehicle tire replacement. It can make up for the defects of insufficient contact area, insufficient loading pressure and not simulating all-round driving conditions of the prior art solution. In addition, the tram running surface coating performance testing equipment 1 can simultaneously test a variety of different anti-skid layers at one time, and can obtain the wear comparison of different anti-skid layers under the same conditions, and compare the wear resistance of different anti-skid layers.

In the description of this specification, description with reference to the terms "specific embodiment", "specific example", etc. means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention or in the example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention. Variations, the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a tram walks capable coating performance test equipment of line which characterized in that includes:

a base:

the rotary tray is rotatably arranged on the base;

the coating sample plate is arranged on the rotating tray and rotates along with the rotating tray, and the coating sample plate is provided with a test plane;

the loading device is arranged on the base;

a wheel mounted to the loading device, the loading device applying a loading force to the wheel to adjust the pressure of the wheel against the test plane;

the driving device is connected with the rotating tray to drive the rotating tray to rotate;

a pressure detection system that detects a loading force applied by the loading device and a pressure of the wheel against the test plane;

an angular velocity detection system that detects an angular velocity of the wheel and an angular velocity of the rotating tray.

2. The tram running top coating performance testing equipment of claim 1, wherein the loading device comprises:

a loading bracket mounted to the base;

a loading screw in threaded engagement with the loading bracket;

the sliding assembly is mounted on the loading support in a vertically movable mode, the wheels and the driving device are mounted on the sliding assembly, and the loading screw presses the sliding assembly downwards through rotation.

3. The tram running top coating performance testing apparatus of claim 2, wherein the sliding assembly comprises:

the loading support is provided with a mandrel, the mandrel is sleeved with the sleeve in a vertically movable manner, and the loading screw is rotated to downwards abut against the sleeve;

the supporting beam is provided with a fixing block, the fixing block is in threaded fit with the sleeve and moves up and down along with the sleeve, and the wheels and the driving device are mounted on the supporting beam.

4. The tram running top coating performance testing apparatus of claim 3, wherein the sliding assembly further comprises:

the loading screw rod presses the sliding block downwards to press the sleeve through rotation;

the pressure detection system comprises a loading pressure sensor, wherein the loading pressure sensor is arranged on the upper surface of the sliding block and positioned between the sliding block and the loading screw rod and is used for detecting the loading force of the loading screw rod on the sliding block.

5. The tram running top coating performance testing apparatus of claim 4, wherein the loading stand comprises:

a column mounted to the base;

the upper cross beam is arranged on the upright post, and the loading screw is in threaded fit with the upper cross beam;

the lower beam is arranged on the upright post and located below the upper beam, and the mandrel and the limiting rod are arranged between the upper beam and the lower beam.

6. The tram running top coating performance testing apparatus of claim 3, wherein the drive means comprises:

a derailleur mounted to the support beam;

the motor is installed on the transmission and connected with the rotating tray through the transmission to drive the rotating tray to rotate.

7. The tram running top coating performance testing apparatus of claim 6, wherein the angular velocity detection system comprises:

the wheel angular velocity sensor is arranged on a wheel shaft of the wheel and used for detecting the angular velocity of the wheel;

and the tray angular velocity sensor is arranged on a connecting shaft of the transmission and the rotating tray and used for detecting the angular velocity of the rotating tray.

8. The tram running surface coating performance testing apparatus of any one of claims 1-7, wherein the base is provided with a plurality of rotatable ground rollers, the plurality of ground rollers being spaced circumferentially along the rotating tray, the rotating tray being supported on the plurality of ground rollers.

9. The tram running top coating performance testing apparatus of any one of claims 1-7, wherein the coating coupon plate extends a full circumference along a circumference of the rotating tray; or the coating sample plates are arranged along the circumferential direction of the rotating tray for the whole circumference.

10. The tram running surface coating performance testing apparatus of any one of claims 1-7, wherein the pressure detection system comprises a load pressure sensor disposed between the rotating tray and the coating coupon plate for detecting the pressure of the wheel against the test plane.

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