This invention relates to a
hydraulic cylinder assembly, and more particularly to a
hydraulic cylinder assembly structure suitable for
servo valve control. The invention provides a
hydraulic cylinder assembly structure suitable for
servo valve control that can simultaneously perform forming and
punching on workpieces, and has high driving efficiency under no-load conditions. A hydraulic cylinder
assembly structure suitable for
servo valve control includes a large hydraulic cylinder, a filling valve, a large
piston rod, a
plunger cylinder, a small oil chamber, and a
retaining ring. A filling valve is installed at the bottom of the large hydraulic cylinder, and a large
piston rod is located inside the large hydraulic cylinder. A
plunger cylinder is connected to the bottom of the large hydraulic cylinder. Oil is filled into the
plunger cylinder to improve the movement efficiency of the large
piston rod. The plunger cylinder is hollow inside. This invention first fills the plunger cylinder with oil through a pipeline by starting an
oil supply device. The oil flows upward into the small oil chamber through the hollow part in the middle of the plunger cylinder. Because the internal space of the plunger cylinder is small, the required oil flow rate is small, and the plunger cylinder can be filled in a short time, thus improving the movement efficiency of the large
piston rod.