The invention discloses a forklift hydraulic control system. A forklift comprises a pallet fork, the hydraulic control system comprises an oil tank, a hydraulic pump and a lifting hydraulic cylinder used for controlling the pallet fork to ascend and descend, the hydraulic pump is driven by a motor, an oil inlet of the hydraulic pump communicates with the oil tank, an oil outlet of the hydraulic pump is connected with an oil inlet header pipe, an oil inlet of the lifting hydraulic cylinder is connected with the oil inlet header pipe through a first oil inlet branch, an oil outlet of the lifting hydraulic cylinder is connected with an oil return header pipe through a first oil return branch, the oil return header pipe communicates with the oil tank, a proportional valve is arranged on the first oil return branch, the opening degree of a valve port of the proportional valve is adjustable, and the oil outlet of the hydraulic pump is connected with the oil inlet header pipe through a pressure filter. According to the forklift hydraulic control system, the descending speed of the pallet fork can be accurately controlled conveniently so that the pallet fork can descend in a wriggling manner, and the use safety of the forklift is improved.
本发明公开了一种叉车液压控制系统,叉车包括货叉,该液压控制系统包括油箱、液压泵和用于控制货叉升降的升降液压缸,液压泵由马达驱动,液压泵的进油口和油箱相连通,液压泵的出油口连接有进油总管,升降液压缸的进油口通过第一进油支路和进油总管相连接,升降液压缸的出油口通过第一回油支路和回油总管相连接,回油总管和油箱相连通,第一回油支路上设置有比例阀,比例阀的阀口开度可调,液压泵的出油口通过压力过滤器和进油总管相连接。本发明能够方便地实现货叉下降速度的精准控制,使得货叉能够蠕动下降,提高了叉车的使用安全性。
Forklift hydraulic control system
一种叉车液压控制系统
2021-11-30
Patent
Elektronische Ressource
Chinesisch
IPC: | 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 / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |