Oil damper for rolling stock

Abstract

The invention relates to an oil damper for rolling stock, belonging to dampers. The oil damper comprises a hydraulic cylinder, a piston, a piston rod, an oil cylinder housing, a cylinder bottom valve and a protective cover; the piston is in radial clearance fit in the hydraulic cylinder; the piston and the lower end of the piston rod are in tight fit fixation; a guide sleeve is in coaxial clearance fit on the piston rod, and has the necking columnar bottom in tight fit with the upper opening of the hydraulic cylinder, and the outer periphery of the upper columnar body in tight fit with the upper opening of the coaxially fitted oil cylinder housing; the protective cover is fitted on the oil cylinder housing and the guide sleeve; an upper load link rod is in coaxial connection with the upper end of the piston rod via the base of the upper load link rod; the upper load link rod has a first load connection rubber pad fitted on the upper load link rod, and is fixed by a gland; the lower opening of the hydraulic cylinder is in tight fit with a valve, which is in tight fit with the tray of a lower load link rod at the outer end of the valve; the periphery of the tray is in tight fit with the lower opening of the oil cylinder housing; and the lower load link rod has a second load connection rubber pad fitted on the lower load link rod, and is fastened by a support cap. The inventive oil damper for rolling stock has the characteristics of no oil leakage, stable performance, good insusceptibility to ambient temperature change, high sandstorm resistance and long product service life, and can realize steady and safe running of vehicles, and improve vehicle comfortableness and service life.

Description

technical field [0001] The invention belongs to a shock absorber, in particular to an oil pressure shock absorber for a rolling stock. Background technique [0002] With the increase of train running speed, various vertical, horizontal and serpentine effects between the wheel and rail will cause severe vibration of the vehicle system. Widely used on railway vehicles, it plays an important role in the smooth and safe operation of the vehicles, improving the comfort and the service life of the vehicles. However, the current domestically produced hydraulic shock absorbers have serious problems such as oil leakage and unstable performance, and are difficult to meet the operation requirements. Currently, trains in my country mainly use shock absorbers produced in Europe and Japan. However, due to the small size of Europe and Japan, small environmental changes, and short train mileage, their shock absorbers can meet the operating requirements within their geographical range. It h...

AI Technical Summary

Problems solved by technology

However, due to the small size of Europe and Japan, small environmental changes, and short train mileage, their shock absorbers can meet the operating requirements within their geographical range. It has great limitations, mainly in: the shock absorber has poor resistance to environmental temperature changes, poor wind and sand resistance, product performance symmetry and low life, and cannot meet the long-distance and high-frequency train use in my country, resulting in vibration reduction Device products are tested every six months and replaced every two years

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