RU2328714C1 - Stand for dynamic testing of tyres - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: stand consists of a drum, mounted on ball-and-roller supports, an electric motor, a rotating drum, loading devices, arranged symmetrically on both sides of the drum, consisting of a cross beam, an actuating cylinder for radial loading, a unit for mounting the test tyre (carriage) and a force measuring sensor. The stand is also equipped with common horizontal columns, on which the cross beam moves with the actuating cylinder fixed on it and a unit for mounting the test tyre (carriage). The force-measuring sensor is put between the cross beam with an actuating cylinder fixed on it and the unit for mounting the test tyre.

EFFECT: increased accuracy of representing radial loading of a tyre and provision for coincidence of axes of applying radial loading and the axis of the test tyre.

1 dwg

Description

The invention relates to tests of vehicles, and more particularly to stands for dynamic testing of pneumatic tires.

Known stands for testing pneumatic tires with a wide range of diameters during continuous rolling on a smooth drum. For example, a tire-rolling test bench of type IPZ, testing machines for tires of automobiles of type IMSh / 1 /. All of them have a device for installing the test tires in the form of a trolley on rollers moving during the test along the guides (rails) mounted on the foundation.

So, the disadvantage of the IPP busbar stand is that it includes a lever system for creating a radial load, with a manually hung load, which leads to an error in reproducing the applied load on the test tire.

Closest to the proposed one is a test bench for tires according to copyright certificate No. 932350/2 /, containing, in addition to a drum, a test tire mounting unit, measuring devices, a power cylinder equipped with a shank mounted on a frame in a ball bearing, and a load cell, spring suspensions, on which the power cylinder housing is mounted, a frame with a fixed stop, provided with guides to limit lateral movements of the carriages.

The presence of spring suspensions and ball bearings does not allow coaxial application of the load on the tire, and the friction in the ball bearings and the test tire mounting unit introduces additional errors in the readings of the load cell. In addition, the guides provided with the frame to limit lateral movements of the carriages allow axial displacement of the tire being tested.

These disadvantages of the prototype are undesirable and lead to inaccuracies in the reproduction of the applied load.

The aim of the invention is to increase the accuracy of reproduction of the radial load on the tire and ensuring coaxiality of the application of the radial load and the axis of the test tire.

This goal is achieved due to the fact that the stand for dynamic testing of tires, containing a drum mounted on ball bearings, an electric motor, a rotating drum, loading devices located symmetrically to the drum on both sides, including a crosshead, a power cylinder to create a radial load, node the installation of the test tire (carriage) and the load sensor, is equipped with common horizontal columns along which the traverse moves with the power cylinder fixed on it and the unit is installed ki test tire (carriage), and force-measuring sensor mounted between the crosspiece with fixed on it and the power cylinder unit installation test tire.

The proposed stand for dynamic tire testing is presented in the drawing.

The dynamic tire test bench is a structure consisting of a drum 11 mounted on two ball-bearing bearings 10 and driven by a variable speed motor 12. Symmetrically to the drum 11, loading devices are arranged on both sides of the drum, consisting of a traverse 3 with a power cylinder 5 and a carriage 7, moving along horizontal columns 8, mounted on supports 1 and 9. The carriage 7 is supported on horizontal columns 8 by sliding bearings (not shown) from material with a low coefficient of friction and serves to secure the test tire 13 to it.

The yoke 3 is a welded structure with a power cylinder fixed on it 5. The yoke 3 is fixed on the horizontal columns 8 by four hydraulic clamps 4. The yoke 3 is connected to the carriage through the power cylinder 5 and the load cell 6. The yoke 3 is mounted with cylinders 7 2. The radial load on the tire is created by the power cylinder 5 with a fixed position of the beam 3 on the horizontal columns 8.

The work of the inventive stand for dynamic tire testing is as follows.

The tire 13 mounted on a special axis (not shown) is mounted and fixed on the carriage 7. The tire 13 is supplied to the drum 11 using cylinders 2, after which the crosshead 3 is fixed on horizontal columns 8 with hydraulic clamps 4. Radial load on the tested tire 13 is produced by the power cylinder 5 mounted on the traverse 3, and is measured by the force measuring sensor 6.

The proposed scheme of the test bench for dynamic tire tests, equipped with common horizontal columns along which the traverse with the power cylinder fixed on it and the test tire mounting unit mounted, and the force measuring sensor installed between the traverse with the power cylinder fixed on it and the test tire mounting unit, ensure strict application alignment radial load and the axis of the test tire, and therefore, the accuracy of the reproduction of the radial load on the tire, which ultimately increases significantly aw test results.

The device is simple to manufacture and easy to maintain.

It is intended to use the inventive device in the development and manufacture of a “Stand for a running double CO2-100”.

Information sources

1. Machines and devices for testing polymeric materials. Trading house Laboratory assistant. R&D Center "LaborKomplektServis".

2. USSR author's certificate No. 932350 "Tire test bench." Bulletin No. 20. 1982 g.

Claims (1)

A dynamic tire test bench, comprising a drum mounted on ball bearings, an electric motor, a rotating drum, loading devices located symmetrically on both sides of the drum, including a crosshead, a power cylinder for creating a radial load, a test tire mounting unit and a load cell, characterized the fact that it is equipped with common horizontal columns along which the traverse moves with the power cylinder fixed on it and the test tire mounting unit, and the force The test sensor is installed between the traverse with the power cylinder fixed on it and the test tire mounting unit.