When HPC hydraulic cone-breaking work, by rotating the motor driven pulley for rotating cone pendulum movement Department, so that ore constantly under attack in the crushing cavity, make the ore crushing by pressing and bending role. Its spring insurance system is a overload device allowing the metallic foreign body through the crushing chamber without detriment to the machine, use two kinds of sealed form of dry oil and water, so that stone mill and lubricants isolation to ensure reliable operation.