Two-way quick cylinder and wood splitter

A two-way quick cylinder, comprising:

• a hydraulic oil cylinder body;
• a large piston, which is slidably provided in the said hydraulic oil cylinder body and divides the inner chamber of the said hydraulic oil cylinder body into a rod chamber and a rodless chamber;
• a piston rod, which is telescopically installed on the said hydraulic oil cylinder body, and the end of the said piston rod extends into the said rod chamber to be connected with the said large piston;
• a hydraulically controlled one-way valve, which is installed on the said large piston to be used for communicating the said rod chamber and the said rodless chamber;
• and
• when hydraulic oil enters the rodless chamber from the oil pump and drives the large piston to move, the oil pressure in the said rod chamber increases and the hydraulically controlled one-way valve is enabled to open, so that the hydraulic oil in the rod chamber enters the rodless chamber through the hydraulically controlled one-way valve and pushes the large piston to move.