Test device and method for researching friction characteristics between tire and actual pavement

A friction characteristic and test device technology, which is applied in the direction of automobile tire testing, measuring devices, and mechanical devices, can solve problems such as large energy consumption, increased equipment power, and difficult control of wheel slip rate, and achieves a smooth torque transmission process. , shorten the adjustment time, eliminate the effect of heating phenomenon

Pending Publication Date: 2019-04-12
西安凯德液压机电有限责任公司
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese Patent Publication No. CN 101532934A discloses "A Method and Device for Accelerated Loading Test of Main Drive Wheel Type Pavement Material". Because the centrifugal force has a destructive effect on the test pavement material, the test cylinder cannot be rotated at high speed and can only be tested at low speed, so the conclusion obtained is relatively different from the actual situation.
In addition, its technical solution adopts the method of braking the test tires for the slip test, which has the following problems: 1. During the working process of the brake, the friction plate will generate a lot of heat, and the test cannot be continued due to the temperature rise; 2. The braking process It consumes a lot of energy and increases the power of the equipment; 3. It is difficult to control the slip rate of the wheel during braking, which will make data analysis difficult
[0004] In summary, the simulation conclusions of the existing simulation test devices are generally quite different from the actual situation, cannot accurately reflect the actual situation, and cannot meet the needs of friction process research.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Test device and method for researching friction characteristics between tire and actual pavement
  • Test device and method for researching friction characteristics between tire and actual pavement
  • Test device and method for researching friction characteristics between tire and actual pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 , figure 2 , the radius of the testing wheel 27 is equal to that of the auxiliary wheel 15, and the length L of the rotating arm of the testing wheel 27 1 Length L greater than the arm of the auxiliary wheel 15 2 , the transmission ratio of the power transmission box 13 is minus 1, that is, the rotational speeds of the two shaft ends of the power transmission box 13 are equal in magnitude and opposite in direction.

[0044] The motor 1 is equipped with a speed regulating device, the motor 1 is directly connected with the reducer 2, the reducer 2 is fixedly installed on the top of the frame 29, the output shaft of the reducer 2 is connected with the driven pulley 4 through the belt 3, and the driven pulley 4 It is fixedly connected with the central tube shaft 5; the central tube shaft 5 is hollow in the axial direction, and a loading screw 7 is arranged inside the central tube shaft 5, and the loading screw 7 is arranged on the axis of the central tub...

Embodiment 2

[0067] Such as image 3 , Figure 4As shown, in this embodiment, there is a large hole in the horizontal direction between the upper partition and the lower partition in the loading sleeve 12, and the rotating arm 24 passes through this large hole, and the rotating arm is driven by the driving pin 32. 24 is hinged with the loading sleeve 12, and the L 1 2 , the test loop 17 is arranged on the inside, and the auxiliary loop 18 is arranged on the outside. All the other structures are the same as in Example 1.

[0068] At this time, the auxiliary wheel 15 does not slip, but the running speed is fast, the actual speed of the test wheel 27 is slow, and it slips backward, and the slip rate σ is calculated according to the following formula:

[0069]

[0070] When the rotating arm 24 rotates at an angular velocity ω, the test wheel 27 slides backward, and the ground gives the test wheel 27 a forward friction force F 1 , friction force F 1 It is to drive the rotating arm 24 to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a test device and method for researching friction characteristics between a tire and an actual pavement, and belongs to the technical field of detecting equipment. Actual working conditions of the tire with load running on different pavements are well simulated through mechanical structures such as a loading sleeve, a loading sleeve base, a rotary arm and a rack, the test device and method for researching friction characteristics between the tire and the actual pavement can be used for testing a friction factor between the tire and the pavement and researching wear pattern between the tire and the pavement, compression amount of a loading spring can be adjusted through a loading screw according to requirements, and thus a test load is adjusted; meanwhile tire running speed is adjusted through a transmission system; changing is conducted on a slip rotary rate or a slip shift rate between the tire and a pavement through adjusting a connected relation between a tested wheel and an auxiliary wheel, multiple kinds of running conditions of the tire on the pavement are simulated, data such as the load, a rotate speed and a torque are detected in real time through asensor, and thus the friction factor between the tested tire and the tested pavement is obtained by formula calculation.

Description

technical field [0001] The invention belongs to the technical field of detection devices, and in particular relates to a test device and method for researching the friction characteristics of tires and actual road surfaces. Background technique [0002] At present, the number of various motor vehicles continues to increase, and the frequency of action of vehicle loads on the road surface is also increasing. The gravity of the vehicle load will deform the road surface and form ruts. When the vehicle starts, brakes, shifts, turns, and overcomes various resistances, it will exert a horizontal shear force on the road surface. This shear force will cause the road surface to move horizontally Under the above-mentioned complex alternating loads, the service life of the pavement is also greatly reduced. Specifically, on the one hand, the friction coefficient between the tire and the road will decrease with the wear and tear of the tire surface and the road surface, which will incre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/02G01N3/56G01M17/02
CPCG01N19/02G01M17/02G01N3/56
Inventor 高彦军高军姚柯飞郁录平胡松刚王科瑶张焱男闫冬冬田江勇张红梅
Owner 西安凯德液压机电有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap