3T vertical hand hydraulic jack jack for emergency tool of tire change for van and car

Vertical hydraulic jack, hydraulic jack, jack

Product description: jack is commonly used in the production of a lifting tool.QYLType a vertical hydraulic jack is a new product of national design. Its structure is simple, easy to operate, small size, light weight, easy to repair. It is widely used in lifting operations of warehouses, Bridges, docks, transportation and construction engineering departments in factories. This product can only be used upright, and its working environment temperature is- 20cto+ 45c, not suitable for use in acid, alkali and corrosive gases.

Working principle:

Hydraulic jacks work according to PASCAL's law. It consists of a fuel tank, two pressure cylinders of different sizes, a rocker and a closing needle valve. When working, lift the small piston and suck the oil into the small pressure cylinder. When pressing down the small piston, push the oil into the large pressure cylinder. By means of two valves, the pressure of the small piston on the oil is transferred to the large piston, which lifts the weight. The weight can be raised to a certain height by the constant reciprocation of the small pistons. After finishing the work, open and close the needle valve to connect the high pressure oil cylinder with the oil tank. At this point, as long as a little pressure on the big piston, the piston can fall, oil back to the tank