Hydro-pneumatic suspension and mining dump truck

Abstract

The invention relates to a hydro-pneumatic suspension and a mining dump truck. The hydro-pneumatic suspension comprises a cylinder barrel, a cylinder bottom, a piston rod, a first piston, a second piston and an elastic piece, wherein the cylinder barrel is pre-filled with oil gas; the cylinder bottom is arranged at the end part of the cylinder barrel; the first end of the piston rod is movably arranged in the cylinder barrel, and the second end of the piston rod is located outside the cylinder barrel; the first piston is arranged in the cylinder barrel and connected to the first end of the piston rod; the second piston is arranged in the cylinder barrel and located between the first piston and the cylinder bottom; and the elastic piece is connected with the second piston and the cylinder bottom. According to the hydro-pneumatic suspension, double buffering and vibration reduction are achieved through the oil gas and the elastic piece, the reliability is high, and the problem that a vehicle cannot run normally under the conditions of oil gas leakage and vibration reduction failure of a hydro-pneumatic suspension with single oil gas vibration reduction is solved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an oil-gas suspension and a mining dump truck. Background technique [0002] Mining dump truck is a large-scale transportation machinery used in various large-scale open-pit mining areas, water conservancy and hydropower projects, etc., and belongs to off-road vehicles. The road conditions of mining dump trucks are very poor, and the requirements for vehicle comfort, ride comfort and operational stability are relatively high. As the buffer and vibration reduction mechanism of the vehicle, the oil-pneumatic suspension is the main component connecting the axle and the frame. , the reliability of the oil-pneumatic suspension is very important to the reliability and comfort of the vehicle. Furthermore, mining dump trucks are short-wheelbase and extremely heavy vehicles, and there is no corresponding space to install traditional leaf springs for vibration reduction. Oil-pneumatic...

AI Technical Summary

Problems solved by technology

When a mining dump truck encounters potholes or raised obstacles while driving on the road, the piston rod of the oil-pneumatic suspension expands and contracts relatively quickly, and it is prone to direct contact between the piston and the cylinder bottom or the guide sleeve, resulting in frequent expansion and contraction of the piston rod. Seal damage, oil leakage and air leakage

[0004] During the transportation of the vehicle, oil and air leakage of the oil-pneumatic suspension will cause the vibration damping effect of the oil-pneumatic suspension to fail, and the vehicle will not be able to drive; and because the vehicle is far away from the maintenance factory, the cost of on-site maintenance will be greatly increased, and will affect Normal driving of other vehicles, serious safety accidents

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