针对传统多级液压油缸工作压力小,各级推力小且不等,活塞杆单向伸出距离长、 挠度大,工作时稳定性和可靠性差、 使用寿命短等缺陷,对其整体结构进行重新设计.采用不同的缸径和活塞杆直径,通过内部配油座合理排列组合,实现了三级等推力且推力较大;采用活塞杆双向伸出结构,使活塞杆单向伸出长度短,伸出挠度小,防止部件被啃伤.通过以上的改进,液压油缸的稳定性及使用寿命大大提高.设计的产品已获发明专利(ZL201310691041.5).%The traditional multistage hydraulic cylinder has many disadvantages , such as working pressure is small , thrusts at all levels are small and unequal , one way out distance of piston rod is long , deflection is large , stability and reliability at work are poor , service life is short and etc .To overcome the defects , the whole structure was redesigned .Different cylinder diameters and piston rod diameters were adopted , through reasonable arrangement and combination of internal oil distribution base , three stage equal thrust was achieved and the thrust was larger .Bidirectional extended structure of piston rod was adopted , then one-way out length of the piston rod was short , the out deflection was small , to prevent the parts to be injured .Through the above improvement , the stability and the service life of the hydraulic oil cylinder are greatly increased .This product has won a patent for invention ( ZL201310691041.5 ) .
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