The invention discloses an automatic locking device of a lift truck. The automatic locking device comprises a locking pin, a hydraulic pump, a manual reversing valve, a lifting oil cylinder, a first hydraulically-controlled reversing valve, a second hydraulically-controlled reversing valve, a locking oil cylinder, a magnet, a proximity switch, a power source and an electromagnetic valve; an execution opening B of the manual reversing valve communicates with an oil inlet P of the first hydraulically-controlled reversing valve; an execution opening A of the first hydraulically-controlled reversing valve communicates with a rodless cavity of the lifting oil cylinder; an execution opening B of the first hydraulically-controlled reversing valve communicates with a control opening K of the second hydraulically-controlled reversing valve; an execution opening A of the second hydraulically-controlled reversing valve communicates with an oil inlet P of the electromagnetic valve; an execution opening A of the electromagnetic valve communicates with a rod cavity of the locking oil cylinder and a control opening K of the first hydraulically-controlled reversing valve; and the proximity switch,the power supply and the wiring end K of the electromagnetic valve are electrically connected in sequence to form a loop. According to the automatic locking device, a compartment can be lifted only after the locking mechanism can automatically unlock the compartment when the lift truck performs installation operation; and the locking mechanism can automatically lock the compartment after the compartment falls down before the lift truck runs.
一种升降车的自动锁紧装置,包括锁紧销、液压泵、手动换向阀、举升油缸、第一液控换向阀、第二液控换向阀、锁紧油缸、磁体、接近开关、电源和电磁阀;手动换向阀的执行口B与第一液控换向阀的进油口P连通,第一液控换向阀的执行口A与举升油缸的无杆腔连通,第一液控换向阀的执行口B与第二液控换向阀的控制口K连通;第二液控换向阀的执行口A与电磁阀的进油口P连通,电磁阀的的执行口A分别与锁紧油缸的有杆腔和第一液控换向阀的控制口K连通;接近开关、电源和电磁阀的接线端K依次电连接并形成回路。本发明可实现升降车进行安装作业时锁紧机构能自动解除锁紧后车厢才可以举起;升降车行驶前车厢下落后锁紧机构才会自动锁紧。
Automatic locking device of lift truck
升降车的自动锁紧装置
2021-01-22
Patent
Electronic Resource
Chinese
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 |