Brake axle load integrated-type axle load measuring device

Abstract

The invention discloses a brake axle load integrated-type axle load measuring device, which comprises a roller-type brake force testing platform, a pressure plate, a pull rod, a force measuring sensor, a working air cylinder, first connecting pieces, a second connecting piece and four working levers which stay on the same horizontal plane, wherein the pressure plate is fixedly connected with a push rod of the working air cylinder sequentially through the pull rod and the force measuring sensor, a first end of each working lever is connected with the pressure plate respectively through own first connecting piece, and a second end of each working lever is connected with a stander of the testing platform respectively through the second connecting piece; two of the four working levers are overlapped with a first straight line, the other two working levers are overlapped with a second straight line, the orthographic projection of a joined point of the first straight line and the second straight line on a working panel of the testing platform is overlapped with a geometric center of the working panel, and two working levers staying on the same straight line are symmetrically distributed by adopting the joined point as the center; and each first connecting piece comprises a first lower spherical seat and a first steel ball, and each second connecting piece comprises a second upper spherical seat, a second steel ball and a second lower spherical seat.

Description

technical field [0001] The invention relates to the field of motor vehicle performance testing, in particular to a brake axle load integrated axle load measuring device. Background technique [0002] Braking performance is one of the most important safety performance indicators of motor vehicles, and good braking performance is the premise to ensure the safe operation of motor vehicles. Currently, braking performance is measured as a percentage of a motor vehicle's braking force to axle load. [0003] At this stage, the drum-type braking force test bench is widely used to measure the braking performance of motor vehicles. When measuring the braking force, it mainly uses the reaction force of the tire to the roller during braking. The reaction force is measured by the force sensor, and then Find the braking force of the motor vehicle. When measuring the axle load of a motor vehicle, it is mainly measured by lifting the wheel through the working cylinder. In this method, ...

AI Technical Summary

Problems solved by technology

When measuring the axle load of a motor vehicle, it is mainly measured by lifting the wheel through the working cylinder. In this method, when the wheel of the motor vehicle deviates far from the center of the cylinder, an additional overturning moment will be generated on the working cylinder, making the cylinder push rod and The cylinder produces a large friction force which affects the accuracy of the measurement results

In addition, most of the current drum-type braking force measurement devices test the axle load and braking force separately. This test method requires the vehicle to go through multiple parking and positioning, which increases the probability of error and reduces the test accuracy. Accuracy, while greatly increasing the working time, reducing work efficiency and increasing labor intensity

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