self-locked cylinder

Self locked cylinder, including cylinder block, cylinder piston working cavity with the top up, top-up along the axial piston fixed on the face there can be piercing at the top end cap of the cylinder piston rod, piston rod back position with the oil chamber, oil chamber upper back bit  with the piston, the piston back to the lower end position along the axial piston fixed a bit back, back to the position along the axial piston rod through the bottom of the piston and the cylinder of fixed connected with the top cover up out of the cylinder along the axis, the cylinder body has a lock cylinder, sleeves, and a number of lock blocks, the top face on the sleeve of a gland, the lateral wall of the sleeve and coherent picture tube body wall, along the axial piston rod through a number of lock blocks, each block is under lock and unlock the piston end face on the match, each locking block on the face and the lower surface of plate paste, between the top plate and a compression spring as described gland, gland fixed at the upper end of the cylinder. The aim is to provide a lifting of heavy objects was to prevent the decline of self-gravity self locked cylinder. Kewords :