The invention relates to a hydraulic stop iron mechanism of a
cutting device, which comprises a stop iron, an upper end cover, locking nuts, a
piston rod, a lower end cover, a pull rod, a fixing nut, a cylinder
barrel and sealing members, and also comprises a change valve, a
check valve, an adjustable restrictor valve and the like. The upper end cover, the cylinder
barrel and the lower end cover are connected by the pull rod and are fixed by the locking nuts, the
piston rod passes through the upper end cover and is arranged in the cylinder
barrel; the stop iron and the
piston rod are screwed and locked by the locking nuts; the
piston rod, the upper end cover and the cylinder barrel are in sliding fit and the
piston rod is provided with the sealing members; the cylinder barrel, the upper end cover and the lower end cover are in transition fit and the cylinder barrel is provided with the sealing member; the upper end cover is provided with an oil hole communicated with an oil outlet of the change valve, the
check valve is connected in parallel with the adjustable restrictor valve, an oil outlet of the
check valve is communicated with an oil hole on the lower end cover, and an oil inlet is communicated with the other oil outlet of the change valve. The invention can be automatically and accurately positioned through a hydraulic
system without manual adjustment, saves time and labor, and improves the working efficiency.