SU1682881A1 - Installation for wear resistance testing of tyre rubber - Google Patents

Abstract

This invention relates to a testing technique. The purpose of the invention is to bring the test conditions closer to the actual conditions of use of automobile tires. First, the first elastic element 10 is compressed by means 12. A rotation drive 4 and a vibrator 7 are turned on. As a result, a loading plot with three inflection points is obtained, which corresponds to the actual conditions of car tires operation. 1 il.

Description

7 D. /

T

 - MR

; N

 - 1- (L

WITH

f - rMf-r-

L, J

&

O 00 fO 00 00

The invention relates to a test technique and can be used to simulate the slip process of a blocked car tire, as well as rolling in its driven, driving and braking conditions.

The aim of the invention is to approximate the test conditions to the actual conditions of operation of automobile tires by creating a loading plot with three inflection points.

The drawings show the installation diagram.

The installation comprises a frame 1, a support 2 of the counterpiece 3 mounted on it, a rotation drive 4, a sample 5 holder 5, a loading unit in the form of a vibrator 7, two pivotally connected rods 8 and 9, the free ends of which are connected by two elastic elements 10 and 11, respectively, with the vibrator 7 and the holder 5 of the sample 6, and (means 12 for precompression of the first elastic element 10, the displacement assembly is designed as a spring-loaded rod 13 and an articulated parallelogram 14, which is connected to one end of the spring-loaded rod 13 and by the other end is connected with frame 1, two strain gates 15 and 16 are connected with recording equipment.

The installation works as follows.

Preliminary by means 12, the first elastic element 10 is compressed. A rotary actuator 4 and a vibrator 7 are turned on. The preliminary compression means 12 moves in a direction perpendicular to the working surface of the counterpiece 3 with a force equal to the force of preliminary pressing of the elastic element 10 and deforms the second elastic element 11. Sample 6 comes close to counterpiece 3, a gap between them is selected. After contacting sample 6 and counterpiece 3 by compressing the second elastic element 11, a force arises linearly increasing with

from moving. Upon reaching a loading force equal to the preload force of the first elastic element 10, a first inflection point occurs on the loading diagram. Further, the force slightly increases linearly. Then the unloading stage begins.

In addition, after touching the counterpiece 3 with sample 6, the latter begins to move in the plane of counterpiece 3. When

This spring loaded thrust 13 creates a tangential force in the plane of contact of sample 6 with counterpiece 3, the value of which is determined by the rigidity of the spring loaded part 13.

Claims (1)

Invention Formula An installation for testing samples of tread rubber for wear, comprising a frame, a mounted counter holder, a drive for its rotation, a sample holder, a loading unit in the form of a vibrator, and a sample holder moving unit, characterized in that, in order to bring the test conditions closer to real conditions of operation automobile tires, it is equipped with two articulated joints, the free ends of which are connected by means of two elastic elements with a vibrator and a sample holder, respectively, and precompression of the first elastic element, the displacement unit is made in the form of spring-loaded tie-rod and a hinged parallelogram, which by its one link is connected with one end of the spring-loaded tie-rod, and the latter with its other end is connected with the frame.