The invention discloses a two-direction mechanical locking
hydraulic cylinder, and belongs to the technical field of air cylinders. When high-pressure oil is injected from an oil port in the bottom of the cylinder,
high pressure oil pushes a rear spring base to compress a rear spring, and rightward pushing force is provided for a
piston and a
piston rod at the same time; after a rear spring base moves leftwards by a certain distance, a
steel ball is disengaged from a rear locking base, unlocking is achieved, and the
piston rod begins to stretch out. When the piston is close to a front locking base, the
steel ball pushes a front spring base to compress a front spring, the
steel ball enters a groove in the front locking base, the front spring base is inserted into the portion below the steel ball under the action of
spring force so as to support the steel ball, and locking is achieved. In this way, even when two working chambers completely release pressure, under the action of the
spring force, the piston and the
piston rod can be firmly locked at the two end limiting positions. According to the two-direction mechanical locking
hydraulic cylinder, stable mechanical locking can be achieved at the
top dead center and the bottom dead center, pressure can be completely released after locking, and the service life of the
hydraulic cylinder can be prolonged.