Hydraulic shock absorber works: When the impact will be driven by external axial piston hydraulic oil squeeze the inner tube, after pressurized hydraulic oil discharged by one of the drain hole of the inner tube, and discharged from the inner tube of the hydraulic oil also back to the hole of the inner tube back into the tube; when the external force disappears, the spring piston bounce starting point waiting for the next action. So the principle of hydraulic buffer will be able to balance the moving object effectively stopped.
Classification of hydraulic shock absorber: can be divided into adjustable hydraulic shock absorber, not adjustable buffer two categories.