Device and method for testing force of rail vehicle carriages on chassis

Abstract

The invention discloses a device and a method for testing the force of a rail vehicle carriage on a chassis, and particularly relates to a mobile force measuring device for testing the action force of a rail vehicle carriage on a bogie. The device includes a mobile chassis vehicle, a weighing unit, an invar rod, an electronic leveling instrument, and a control device. The mobile chassis vehicle can move freely and relatively on the rail to meet the force measurement requirements of rail vehicles of different length. The weighing unit is provided with a servo drive mechanism, and can rise or fall according to the instruction issued by the control device. The invar rod and the electronic leveling instrument can accurately measure the level difference of the carriage support points. Compared with the existing method of testing the action force of a carriage on a bogie, the test method of the invention is neither limited by the vehicle model nor affected by the terrain. The device and the method have the advantages of simple structure, convenient operation, high accuracy of detection, flexible operation in the detection process and high practicability, and can be widely used in the small-batch multi-model assembly line in a rail vehicle factory.

Description

technical field [0001] The invention relates to a test device and method, in particular to a test device and method for the force exerted by rail transit vehicle carriages on a chassis. Background technique [0002] According to the requirements of "IEC 61133-2006 Vehicle Test Specifications Before Assembly and Operation of Vehicles", the deviation of vehicle wheel weight shall not exceed ±4% of the average wheel weight of the axle, and the deviation of axle load shall not exceed ±2% of the average axle weight[ 1]. Therefore, effective measures must be taken during the design and manufacture of subway vehicles to control the wheel (axle) weight deviation within a small range. [0003] The existing weighing and spring adjustment technology generally decomposes the vehicle into bogie and car body, which are controlled separately. Due to the distortion and deformation of the car body welding, and the complex and large number of car body assembly parts in the ready state, the a...

AI Technical Summary

Problems solved by technology

[0003] The existing weighing and spring adjustment technology generally decomposes the vehicle into bogie and car body, which are controlled separately. Due to the distortion and deformation of the car body welding, and the complex and large number of car body assembly parts in the ready state, the actual weight of each part of the vehicle and There will be deviations in the theoretical weight, and there will be tolerance accumulation during the assembly process, making the weight measurement and adjustment of the four corners of the car body complex and difficult

[0004] In the traditional car body weighing measurement process, four plane foundations are set on the ground of the measuring station according to the fixed distance of the empty spring bearing surface and the horizontal distance of the empty spring, and a level is used to calibrate to make the flatness ≤ 0.5mm, and then manually move 4 supporting devices, put them on the flat foundation, then place the force sensor on the supporting device, and then operate the car frame machine to slowly drop the car body on the force sensor, so as to obtain the weight of the four corners of the car body, The measurement accuracy is low, and there are special requirements for measuring the fixed distance and empty spring distance of vehicle models, which has great limitations

[0005] Due to the rapid development of the rail transit vehicle industry and the wide variety of models, the existing test benches cannot meet the measurement of different fixed-distance models, and the internal space of the production plant is limited and it is impossible to set up new test benches

Images