Lifting car airbag lifting brake test bench

Abstract

The invention relates to a sedan-chair air bag lifting braking test stand. A stand-side reinforcing truss and a U-shaped framework assembly welding body are fixed to the two sides and the bottom side of the braking stand framework of a counterforce roller braking test stand. Four barrel air bag assemblies and a guide pulley assembly assembling body lift the counterforce roller braking test stand to a certain height by lifting two U-shaped framework assembly assembling bodies. A sensor calibrating system is installed on a first and second stand air bag lifting devices before the test stand is used formally in order to calibrate a first and second cantilever beam weighing sensors. An air bag lifting control system is disposed on one end of the test stand. The ascent and the descent of the counterforce roller braking test stand are controlled by inflating and deflating the air bag. The sedan-chair air bag lifting braking test stand solves a problem that the market is in urgent need of a loading braking test stand with a stand lifting function to check the braking security of multi-axle trucks and combination vehicles formed by semitrailers and is reasonable in structure and low in cost.

Description

technical field [0001] The invention relates to a brake performance detection device applied to automobiles, more specifically, it relates to a car lift type airbag lift brake test bench. Background technique [0002] According to GB7258-2012 "Technical Conditions for Motor Vehicle Operation Safety", when the vehicle is tested for braking performance on the bench, the percentage of the total braking force of the vehicle to the weight of the vehicle and the percentage of the axle braking force to the axle load must reach a certain level. However, most of the current vehicle inspection industry detects the braking performance of the vehicle in the unloaded state, and most of the vehicles are in the loaded state in actual operation. For general passenger cars, the unloaded and If the weight ratio does not change significantly under the load state, the detected no-load braking force can replace the load or even the full-load braking force; If the loading mass of the vehicle is ...

AI Technical Summary

Problems solved by technology

[0004] Among the existing patents related to lifting and braking tables, some of them install a hydraulic lifting mechanism with a complex structure at the bottom of the reaction roller test bench. This method not only occupies a large area, but also improves the stability of the table body lifting Difficult to control; in some cases, the hydraulic cylinder is set on the side of the reaction force roller brake table to lift directly, but the height of the hydraulic cylinder is lower than the upper end surface of the reaction force roller brake table. It is difficult to achieve a smooth lifting of the brake table, and the brake table rollover phenomenon is prone to occur when the brake table is loaded and braked in the lifting state

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