CN111638069B

CN111638069B - Coupling lateral force eliminating device for tire rigidity test bed

Info

Publication number: CN111638069B
Application number: CN202010718836.0A
Authority: CN
Inventors: 卢荡; 索艳茹; 马尧; 刘前进; 邓宝岳; 王昊斌
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-07-23
Anticipated expiration: 2040-07-23
Also published as: CN111638069A

Abstract

The invention discloses a coupling lateral force eliminating device for a tire rigidity test bed, which comprises a test bed main frame, a pavement rotating bracket, a servo motor capable of controlling lateral movement of a test pavement in real time, a fixed pavement and a movable pavement, wherein the servo motor is arranged on the pavement rotating bracket; the road surface rotating support is connected to the main frame of the tire rigidity test bed through a bearing, and a servo motor capable of controlling the lateral movement of the test road surface in real time is fixed at the end of the fixed road surface to control the movement of the movable road surface. The invention has simple structure, the servo motor responds in real time to solve the problem that the lateral force changes along with the sinking amount, the coupling lateral force is eliminated to realize accurate rigidity test, the pavement design is ingenious and reasonable, the moving pavement rotates along with the pavement rotating bracket, the simulation of the side rolling motion of the tire is realized, and the movement of the pavement is ensured not to influence the vertical load.

Description

Coupling lateral force eliminating device for tire rigidity test bed

Technical Field

The invention relates to the field of tire rigidity testing equipment, in particular to a coupling lateral force eliminating device for a tire rigidity testing stand.

Background

The tire rigidity mechanical property can be used for building a tire model and has important significance for the complete vehicle dynamics simulation. The tire rigidity test bed is an important device for acquiring the mechanical characteristics of the tire rigidity.

The six-component characteristic of the tire has strong coupling, so that unexpected force is generated in the tire rigidity testing process, and the testing result is affected. The influence of coupling lateral force is particularly prominent in the roll stiffness test process, the roll stiffness test expects to obtain the relation between vertical force and subsidence, and the roll stiffness test cannot have the effect of other directional forces, but because of the existence of the roll angle, the lateral force can be generated between the tire and the road surface in the test process, and the magnitude changes along with the change of subsidence. The lateral force influence of the process is neglected in the current tire rigidity testing machine.

Disclosure of Invention

To overcome the above-described deficiencies of the prior art, the present invention provides a coupled lateral force cancellation device for a tire stiffness test stand. The device can realize the simulation of the side-rolling movement of the tire, and controls the lateral displacement of the road surface in the test process in real time so as to achieve the aim of eliminating the coupling lateral force.

A coupling lateral force eliminating device for a tire rigidity test bed comprises a test bed main frame, a pavement rotating bracket, a servo motor capable of controlling lateral movement of a test pavement in real time, a fixed pavement and a movable pavement; the road surface rotating support is connected to the main frame of the tire rigidity test bed through a bearing, and a servo motor capable of controlling the lateral movement of the test road surface in real time is fixed at the end of the fixed road surface to control the movement of the movable road surface.

Compared with the prior art, the invention has the beneficial effects that:

1. the structure is simple, the servo motor responds in real time to solve the problem that the lateral force changes along with the sinking amount, and the coupling lateral force is eliminated to realize accurate rigidity test.

2. The road surface design is ingenious and reasonable, the moving road surface rotates along with the road surface rotating support, the tire rolling motion simulation is realized, and meanwhile, the moving of the road surface is ensured not to influence the vertical load.

Drawings

FIG. 1 is a comparison of the lateral force curves with and without a coupled lateral force cancellation device during the same tire roll stiffness test.

Fig. 2 is a comparison of roll stiffness curves with and without a coupled lateral force cancellation device during the same tire roll stiffness test.

Fig. 3 is a schematic view of the overall structure of the present invention.

Detailed Description

As shown in fig. 3, a coupling lateral force eliminating device for a tire rigidity test bed comprises a test bed main frame 1, a road surface rotating bracket 2, a servo motor 3 capable of controlling the lateral movement of a test road surface in real time, a fixed road surface 4 and a movable road surface 5; the road surface rotating support 2 is connected to the main frame 1 of the test bed through a bearing, and a servo motor 3 capable of controlling the lateral movement of the test road surface in real time is fixed on a fixed road surface 4 to control the movement of a movable road surface 5.

The working principle of the invention is as follows:

as shown in fig. 1, the same tire finite element model is used for roll stiffness simulation, the road surface friction coefficient is set to be 1 to simulate a stiffness test bed without using a coupling lateral force eliminating device, the road surface friction coefficient is set to be 0 to simulate the stiffness test bed with using the coupling lateral force eliminating device, and the simulation result shows that the lateral force generated without using the coupling lateral force eliminating device is large and changes along with the change of the sinking amount.

As shown in fig. 2, the same tire finite element model is used for roll stiffness simulation, the road surface friction coefficient is set to be 1 to simulate a stiffness test bed without using a coupling lateral force eliminating device, the road surface friction coefficient is set to be 0 to simulate the stiffness test bed using the coupling lateral force eliminating device, and the roll stiffness curves obtained by the two modes are obviously different according to simulation results.

As shown in fig. 3, when the rolling rigidity test of the tire is performed, the road surface rotation bracket 2 fixed to the test stand main frame 1 is rotated around the axis to simulate the rolling movement of the tire. In the roll stiffness test process, lateral force is generated after the tire is in contact with the moving road surface 5, at the moment, the servo motor 3 capable of controlling the lateral movement of the test road surface in real time adjusts the lateral movement of the moving road surface 5 according to the lateral force measured by equipment, the lateral force is kept to be 0, and an accurate roll stiffness curve is obtained. Because the vertical force in the calculation process of the roll stiffness of the tire is the force vertical to the road surface, the vertical force in the lateral moving process of the moving road surface 5 is not influenced.

Claims

1. A coupling lateral force eliminating device for a tire rigidity test bed is characterized in that: the device comprises a test bed main frame (1), a pavement rotating bracket (2), a servo motor (3) capable of controlling the lateral movement of a test pavement in real time, a fixed pavement (4) and a movable pavement (5); the road surface rotating support (2) is connected to the main frame (1) of the test bed through a bearing, and the moving road surface (5) rotates along with the rotation of the road surface rotating support (2); the servo motor (3) capable of controlling the lateral movement of the test pavement in real time is fixed on the fixed pavement (4) and controls the movement of the movable pavement (5).