CN211927656U - Pull type friction coefficient test vehicle - Google Patents
Pull type friction coefficient test vehicle Download PDFInfo
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- CN211927656U CN211927656U CN201922458535.4U CN201922458535U CN211927656U CN 211927656 U CN211927656 U CN 211927656U CN 201922458535 U CN201922458535 U CN 201922458535U CN 211927656 U CN211927656 U CN 211927656U
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Abstract
The utility model discloses a pull-type coefficient of friction test car, including automobile body, test wheel, accredited testing organization, pneumatic cylinder, speedtransmitter, buffering traction frame etc. two the test wheel is located on the automobile body, accredited testing organization is located in the automobile body, and with the test wheel is connected, pneumatic cylinder one end is fixed on the automobile body, the other end with the supporting legs is connected, the water tank is located in the automobile body, its bottom surface is the inclined plane, and the bottom is passed through the water pipe with the shower nozzle is connected, the shower nozzle is located the oblique the place ahead of test wheel, be equipped with the solenoid valve on the water pipe, speedtransmitter is located in the automobile body, the buffering traction frame fixed with the automobile body front end, pneumatic cylinder, speedtransmitter, solenoid valve all are connected with accredited testing organization's controller. The utility model discloses installed speedtransmitter, the speed of a motor vehicle of direct measurement test car, the coefficient of friction of each position of direct output road, data are clear and definite, and the accuracy is high as a result.
Description
Technical Field
The utility model belongs to the technical field of the coefficient of friction test car, in particular to pull type coefficient of friction test car.
Background
The trailer type double-wheel friction coefficient tester is a testing device for measuring the transverse friction force of a road surface. The main working principle of the friction coefficient tester is that a test wheel drawn by a tractor keeps close contact with a road surface and moves forwards at a constant speed in a parallel direction along the advancing direction of a vehicle, and the test wheel are always kept to form an included angle of 15 degrees through software operation in the process, so that a transverse force perpendicular to the plane measured by a test wheel force sensor is generated, the ratio of the transverse force to the load of the test wheel on the road surface is a transverse force coefficient, and the transverse force coefficient is a reaction of the possibility that the vehicle sideslips on the road surface at a certain speed.
The trailer type friction coefficient test vehicle needs to work at a specific speed, the speed of the vehicle depends on the control of a traction vehicle, and the accuracy of a speed measuring device of the traction vehicle directly influences a test result. The accuracy of the test result is seriously influenced by the difference of speed measuring devices of different traction vehicles. And during the test, the road surface friction coefficient tester can not ensure the uniform speed running according to a fixed speed due to various reasons, the water film thickness at the front end of the road surface friction coefficient test wheel at different running speeds can be different due to the fixed water spraying amount, the water film thickness is thinner when the vehicle speed is higher, the water film thickness is thicker when the vehicle speed is lower, and the test result forms larger fluctuation along with the change of the vehicle speed. The pulling type friction coefficient test vehicle and the traction vehicle adopt a rigid connection mode, and when the traction vehicle accelerates and decelerates, the influence on the test vehicle is large, and the accuracy of a test result can also be influenced.
Disclosure of Invention
The utility model discloses to the technical problem who exists among the prior art, provide a pull type coefficient of friction test car, carried out many-sided improvement, can greatly improve the accuracy of test result.
The utility model adopts the technical proposal that: the utility model provides a pull-type coefficient of friction test car, includes automobile body, test wheel, accredited testing organization, pneumatic cylinder, supporting legs, water tank, water pipe, shower nozzle, speedtransmitter and buffering traction frame, two the test wheel is located on the automobile body, accredited testing organization is located in the automobile body, and with the test wheel is connected, pneumatic cylinder one end is fixed on the automobile body, the other end with the supporting legs is connected, the water tank is located in the automobile body, its bottom surface is the inclined plane, the bottom is passed through the water pipe with the shower nozzle is connected, the shower nozzle is located the oblique the place ahead of test wheel, be equipped with the solenoid valve on the water pipe, speedtransmitter is located in the automobile body, the buffering traction frame is fixed in the automobile body front end, pneumatic cylinder, speedtransmitter, solenoid valve all are connected with accredited testing organization.
Preferably, the buffering traction frame comprises a traction cylinder, a traction rod, a damper and a traction hook, one end of the traction rod is fixed with the traction hook, the other end of the traction rod is located in the traction cylinder, the damper is located between the traction cylinder and the traction rod, and the tail end of the traction cylinder is fixed at the front end of the vehicle body.
Preferably, a GPS positioner is arranged in the vehicle body and is connected with the controller of the testing mechanism.
Preferably, the test system further comprises a liquid crystal control screen positioned in the towing vehicle, and the liquid crystal control screen is connected with the test mechanism in a wireless or wired mode.
The working principle is as follows: a speed sensor is arranged on the vehicle body, the speed of the test vehicle is directly measured, and the test result of each position of a road can be directly output by matching with a GPS (global positioning system) positioner, so that the accuracy is improved. The electromagnetic valve on the water pipe is utilized to control the flow of water, and the electromagnetic valve is matched with the vehicle speed sensor for use, so that the size of water flow can be adjusted according to the size of the vehicle speed. A damper is arranged between the traction cylinder and the traction rod, and when the traction vehicle accelerates and decelerates, the acceleration and deceleration speed of the test vehicle is slowed down.
Compared with the prior art, the utility model discloses the beneficial effect who has is:
1. the utility model is provided with the speed sensor, the speed of the test vehicle can be directly measured, and the accuracy of the speed is high;
2. the water flow control part of the utility model adopts the electromagnetic valve, is matched with the vehicle speed sensor for use, adjusts the water amount of sprinkling according to the vehicle speed, realizes the automatic adjustment of water flow, and improves the accuracy of the test result;
3. the utility model uses the traction cylinder, the damper and the traction rod to play a role of buffering, thereby slowing down the influence of the acceleration and deceleration of the traction vehicle on the test vehicle, ensuring that the test vehicle runs more stably and improving the accuracy of test results;
4. the utility model discloses a coefficient of friction that can each position of direct output road, data are clear and definite, and the accuracy is high as a result.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view of the buffer traction frame of the present invention.
In the figure, 1-a vehicle body, 2-a test wheel, 3-a test mechanism, 4-a hydraulic cylinder, 5-a support foot, 6-a water tank, 7-a water pipe, 8-a spray head, 9-an electromagnetic valve, 10-a traction cylinder, 11-a traction rod, 12-a damper and 13-a traction hook.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model discloses a pull-type friction coefficient test vehicle, as shown in the figure, it includes automobile body 1, test wheel 2, accredited testing organization 3, pneumatic cylinder 4, supporting legs 5, water tank 6, water pipe 7, shower nozzle 8, speedtransmitter and buffering traction frame, two test wheels 2 are located on automobile body 1, accredited testing organization 3 is located in automobile body 1, and with test wheel 2 is connected, pneumatic cylinder 4 one end is fixed on automobile body 1, the other end is connected with supporting legs 5, water tank 6 is located in automobile body 1, its bottom surface is the inclined plane, the bottom is connected with shower nozzle 8 through water pipe 7, shower nozzle 8 is located the oblique place ahead of test wheel 2, shower nozzle 8 designs into arc, and its circular arc radius is identical with test wheel 2, be equipped with solenoid valve 9 on water pipe 7, speedtransmitter is located in automobile body 1, the water tank 6 is provided with a water filling port. The vehicle body 1 is internally provided with a GPS positioner, and the GPS positioner, the hydraulic cylinder 4, the speed sensor and the electromagnetic valve 9 are all connected with a controller of the testing mechanism 3. The liquid crystal control screen is connected with the testing mechanism 3 in a wired mode and can be placed in a traction vehicle. The buffer traction frame is fixed at the front end of the vehicle body 1 and comprises a traction cylinder 10, a traction rod 11, a damper 12 and a traction hook 13, one end of the traction rod 11 is fixed with the traction hook 13, the other end of the traction rod is located in the traction cylinder 10, the damper 12 is located between the traction cylinder 10 and the traction rod 11, and the tail end of the traction cylinder 10 is fixed at the front end of the vehicle body 1. Warning lights can be arranged on the top and the side of the vehicle body 1.
The present invention has been described in detail with reference to the embodiments, but the description is only exemplary of the present invention and should not be construed as limiting the scope of the present invention. The protection scope of the present invention is defined by the claims. Technical scheme, or technical personnel in the field are in the utility model technical scheme's inspiration the utility model discloses an essence and protection within range, design similar technical scheme and reach above-mentioned technological effect, perhaps to the impartial change that application scope was made and improve etc. all should still belong to within the protection scope is covered to the patent of the utility model.
Claims (4)
1. The utility model provides a pull type coefficient of friction test car which characterized in that: including automobile body, test wheel, accredited testing organization, pneumatic cylinder, supporting legs, water tank, water pipe, shower nozzle, speedtransmitter and buffering traction frame, two the test wheel is located on the automobile body, accredited testing organization is located in the automobile body, and with the test wheel is connected, pneumatic cylinder one end is fixed on the automobile body, the other end with the supporting legs is connected, the water tank is located in the automobile body, its bottom surface is the inclined plane, and the bottom passes through the water pipe with the shower nozzle is connected, the shower nozzle is located the oblique place ahead of test wheel, be equipped with the solenoid valve on the water pipe, speedtransmitter is located in the automobile body, the buffering traction frame is fixed in the automobile body front end, pneumatic cylinder, speedtransmitter, solenoid valve all are connected with accredited testing organization's controller.
2. The trailer-type friction coefficient testing vehicle as claimed in claim 1, wherein: the buffering traction frame comprises a traction cylinder, a traction rod, a damper and a traction hook, one end of the traction rod is fixed to the traction hook, the other end of the traction rod is located in the traction cylinder, the damper is located between the traction cylinder and the traction rod, and the tail end of the traction cylinder is fixed to the front end of the vehicle body.
3. The trailer-type friction coefficient testing vehicle as claimed in claim 1, wherein: and a GPS positioner is arranged in the vehicle body and is connected with the controller of the testing mechanism.
4. The trailer-type friction coefficient testing vehicle as claimed in claim 1, wherein: the liquid crystal control screen is connected with the testing mechanism in a wireless or wired mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922458535.4U CN211927656U (en) | 2019-12-31 | 2019-12-31 | Pull type friction coefficient test vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922458535.4U CN211927656U (en) | 2019-12-31 | 2019-12-31 | Pull type friction coefficient test vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211927656U true CN211927656U (en) | 2020-11-13 |
Family
ID=73326211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922458535.4U Active CN211927656U (en) | 2019-12-31 | 2019-12-31 | Pull type friction coefficient test vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211927656U (en) |
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2019
- 2019-12-31 CN CN201922458535.4U patent/CN211927656U/en active Active
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