The working principle of the hydraulic system of the manual hydraulic pallet truck

The manual hydraulic pallet truck is suitable for places such as shopping malls, supermarkets, small warehouses, etc., and is also suitable for places with fire-proof and explosion-proof requirements, making it safer to use. The working principle of the hydraulic system of the manual hydraulic pallet truck is as follows:

The lifting process of the truck: put the knob 107 in the A position, at this time the unloading striker 132 does not interfere with the steel ball 122, at this time the handle 1 is shaken, and the pump core 147 will reciprocate under the combined action of the handle 1 and the spring 149 movement. When the pump core 147 is lifted upwards, negative pressure is formed in the cavity a of the plunger pump, the valve core 120 and the valve body 121 are filled in the tank wall under the action of the spring 119, and the steel ball 122 automatically opens due to the oil pressure. It flows from the F cavity of the oil storage chamber to the e cavity, and then enters the plunger pump a cavity through the steel ball 122, and the oil suction process of the plunger pump is completed.

When the pump core 147 moves downwards, the pressure generated in the cavity a is transmitted to the cavity b. Due to the action of the oil pressure, the steel ball 122 is closed, and the valve core 120 and the valve body 121 are opened, and the hydraulic oil enters the cavity d from the plunger pump a Inside the cavity, the plunger 145 rises at this time.