RU2124712C1 - Automobile front axle tester - Google Patents

Abstract

FIELD: automotive and tractor industry; testing facilities. SUBSTANCE: device has running drum with bearing supports. Running drum is made solid, with detachable trunnions at sides and adjacent strips on surface differing in height. Strips are fitted at different distances from each other. With of running drum is defined by definite relationship. EFFECT: simplified design and provision of conditions of operation close to road conditions. 2 cl, 4 dwg

Description

 The invention relates to the field of technology for determining the wear of mating surfaces of parts, in particular to devices with running drums used in the automotive industry and research laboratories of automotive institutes.

State of the art
A device for testing cars, consisting of two running drums, with straps on the surface, the axis of which is supported by bearings mounted in racks and rigidly connected to the base with a frame on which the scales are mounted to accommodate the front wheels of the car. On the front and rear of the running drums, one rack is installed with the vehicle mount rods, and a brake dynamometer is mounted on the extension of the longitudinal axis of one of the running drums (Yakovlev N.A. Theory and calculation of the car. M .: Mashgiz, 1949.- p. 126, fig. .148).

 The disadvantages of this device for testing the front axles of cars is the inability to detect wear of the moving mating surfaces of the parts of the front axle, as well as the inability to study cars with different track sizes due to the design.

 Closest to the claimed is a device for testing cars, containing two running drums located on the sides of the longitudinal axis of the frame, the shaft of each of which is placed in bearing bearings and are connected to each other by means of a coupling. The other ends of these shafts are also connected via couplings to balancing generators whose axis is kinematically connected to the counter of revolutions of the running drums, which are connected to the scales with lever drives (Yakovlev N.A. Theory and calculation of a car. M .: Mashgiz, 1949.- p. 127, Fig. 149 / prototype /).

 The disadvantages of the prototype include the inability to test the front axles of cars, the track of which is greater than the width of both drums. The complexity of management, adjustment and repair work.

SUMMARY OF THE INVENTION
The objective of the invention is to provide a device for testing the front axles of cars with a gauge in a wide range. In addition, one of the tasks is also to simplify the design.

где
В - ширина бегового барабана;
Л - наибольший размер колеи испытываемой передней оси;
К - безразмерный коэффициент, К = 6 - 8.This goal is achieved by the fact that in the device for testing the front axles of cars, including a running drum with bearings, according to the invention, the running drum is made integral with removable pins on the sides and interchangeable rails of uneven height on the surface, while the width of the running drum is determined by the following ratio:

Where
B is the width of the running drum;
L is the largest track size of the tested front axle;
K is a dimensionless coefficient, K = 6 - 8.

 Moreover, the strips are located at an unequal distance from each other.

Brief Description of the Drawings
The proposed device for testing the front axles of cars is illustrated by drawings, where:
in FIG. 1 - device for testing the front axles of the car, front view;
in FIG. 2 - strap running drum, top view;
in Fig. 3 - strip running drum, a cross section along BB in Fig. 2;
in FIG. 4 - placement of strips along the perimeter of the surface of the running drum, a section along AA in FIG. 1.

с двумя цапфами 4, закрепленными на концах бегового барабана 3 соосно его продольной оси, свободным концом помещенную в подшипниковую опору стойки 2. По периметру поверхности барабана 3 закреплены винтами 5 неравновеликие по высоте "Н" планки 6, расположенные на неодинаковом расстоянии "С" друг от друга. Привод 7 через коробку скоростей 8 соединен с одной из цапф 4 бегового барабана 3. Над беговым барабаном 3 закреплена рама 9.The best option for implementing the device
A device for testing the front axles of vehicles includes a frame 1 on which two racks 2 with bearing supports are mounted. Running drum 3, the width of which is equal

with two pins 4, fixed at the ends of the running drum 3 coaxially with its longitudinal axis, placed with the free end in the bearing support of the rack 2. Along the perimeter of the surface of the drum 3 are fastened with screws 5 unequal in height “H” straps 6 located at an unequal distance “C” each from friend. The drive 7 through the gearbox 8 is connected to one of the pins 4 of the running drum 3. Above the running drum 3 is mounted a frame 9.

 A device for testing the front axles of cars works as follows.

так, чтобы колеса оси 10 находились между смежными планками 6. Затем ось 10 жестко закрепляют на раме 9. При этом колеса оси 10 плотно контактируют с поверхностью бегового барабана 3. После этого включают привод 7 и заданную передачу в коробке скоростей 8. Благодаря чему обеспечивают вращение бегового барабана 3 с окружной скоростью до 150 км/час. При вращении бегового барабана 3 неравновеликие по высоте "Н" планки 6, расположенные на неодинаковом расстоянии "С", поочередно взаимодействуют колесами оси 10, получающими вращение за счет силы трения о поверхность бегового барабана 3, и обеспечивают вибрацию и динамическую нагрузку эквивалентную дорожным условиям оси 10. При этом винты 5 прочно фиксируют положение планок 6 на поверхности барабана 3, а стойки 2 надежно удерживают барабан 3 на раме 1. При установившемся вращении бегового барабана 3 записывают, например, тензометрической аппаратурой (не показано) исходные данные условия воздействия на детали передней оси (поворотные цапфы, шкворни, а также на рулевые тяги и подвеску передней оси) неровностей поверхности бегового барабана 3.The front axle 10 wheels mounted on a running drum 3 having a width

so that the wheels of the axis 10 are between adjacent strips 6. Then, the axis 10 is rigidly fixed to the frame 9. In this case, the wheels of the axis 10 are tightly in contact with the surface of the running drum 3. After that, the drive 7 and the gear set in the gearbox 8 are turned on. rotation of the running drum 3 with a peripheral speed of up to 150 km / h. When the running drum 3 rotates, the straps 6, unequal in height “H”, located at an unequal distance “C”, alternately interact with the wheels of the axis 10, which receive rotation due to the friction force on the surface of the running drum 3, and provide vibration and dynamic load equivalent to the axle road conditions 10. At the same time, the screws 5 firmly fix the position of the strips 6 on the surface of the drum 3, and the posts 2 securely hold the drum 3 on the frame 1. With the steady rotation of the running drum 3, for example, a strain gauge apparatus is recorded uroy (not shown) the source data of the conditions of influence on the details of the front axle (pivots, pivots, as well as on the tie rods and suspension of the front axle) of the surface roughness of the running drum 3.

 After a predetermined time (mileage), intermediate records of the state of operation of the listed parts of the front axle 10 are made. If necessary, the intermediate records of the experiments are compared with the original record. After testing the front axle 10, the information obtained is processed and data is analyzed by comparing subsequent records with the original.

упрощает конструкцию устройства за счет несложного управления, регулировки, проведения ремонтно-наладочных работ. Кроме того, достигают соответствие поверхности бегового барабана натуральным дорожным условиям за счет применения неравновеликих по высоте планок и неодинакового расстояния между смежными планками.This device allows you to test the front axles of cars with track sizes in a wide range due to the performance of the running drum target and the width determined by the ratio

simplifies the design of the device due to simple control, adjustment, repair and adjustment work. In addition, they achieve the correspondence of the surface of the running drum to the natural road conditions due to the use of strips of unequal height and unequal distance between adjacent strips.

Industrial applicability
The invention can be used in factory and research automotive laboratories.

Claims (2)

1. A device for testing the front axles of a car, including a running drum with bearing bearings, characterized in that the running drum is made integral with removable pins on the sides and interchangeable rails of equal height on the surface, while the width of the running drum is determined by the following ratio:

where B is the width of the running drum;
L is the largest track size of the tested front axle;
K is a dimensionless coefficient, K = 6 - 8,
moreover, the strips are located at an unequal distance from each other.  2. The device according to claim 1, characterized in that the value of the dimensionless coefficient K is selected 6 - 8.

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