The invention aims at disclosing a hydraulic oil cylinder for a lifting machine and a shear type lifting machine, and relates to the technical field of vehicle lifting machines, the hydraulic oil cylinder comprises a cylinder barrel, a piston and a telescopic rod; the piston divides the cylinder barrel into a first cavity and a second cavity, a first through hole and a second through hole are formed in the piston, the first end of the first through hole is communicated with the inner wall of the cylinder barrel, the second end of the first through hole is communicated with the first cavity, and the third end of the second through hole is communicated with the inner wall of the cylinder barrel. The fourth end of the second through hole is communicated with the second cavity; a third through hole and a fourth through hole which penetrate through the cylinder barrel are formed in the cylinder barrel, and when the piston slides to the topmost portion and abuts against the sealing ring, the first through hole is communicated with the third through hole, and the second through hole is communicated with the fourth through hole. Gas in the cavities on the two sides of the piston is exhausted synchronously, and the debugging exhaust time of the oil cylinder is greatly shortened.
本发明的目的在于揭示一种举升机用液压油缸及剪式举升机,涉及车辆举升机技术领域,包括缸筒、活塞及伸缩杆;所述活塞将所述缸筒分为第一腔体和第二腔体,在所述活塞设置第一通孔和第二通孔,所述第一通孔的第一端连通所述缸筒内壁,所述第一通孔的第二端连通所述第一腔体,所述第二通孔的第三端连通所述缸筒内壁,所述第二通孔的第四端连通所述第二腔体;在所述缸筒设置贯穿所述缸筒的第三通孔和第四通孔,当所述活塞滑动至最顶部且抵住所述密封环时,所述第一通孔与所述第三通孔连通,所述第二通孔与所述第四通孔连通,技术效果:当活塞滑动至最高位置时,实现了活塞两侧的腔体的气体被同步排出,使油缸的调试排气时间大幅减少。
Hydraulic oil cylinder for lifting machine and shear type lifting machine
举升机用液压油缸及剪式举升机
2024-02-13
Patent
Electronic Resource
Chinese
IPC: | F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
European Patent Office | 2023
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