LOW NOISE TYPE BRAKER FOR HYDRAULIC EXCAVATOR INCLUDING ACCURATE PISTON CONTROL FUNCTION AND METHOD FOR CONTROLLING PISTON OF BRAKER FOR HYDRAULIC EXCAVATOR

摘要

The present invention relates to a low noise type braker for a hydraulic excavator including an accurate piston control function which comprises a hollow backhead housing (10); a valve housing (20) in which a valve (30) is installed; the valve (30) controlling a lifting operation of a piston (60); an accumulator (40) formed in the lower part of the valve housing (20); a cylinder unit (50); the piston (60) of which the upper part is located in the lower part of the backhead housing (10); a pressure control valve (70) controlling a supply pressure; a front head unit (80) connected to the lower part of the cylinder unit (50); a chisel (90) performing a crushing work; a chisel bush (110) gripping the upper part of the chisel (90); and a front bush (120) gripping the lower part of the chisel (90).;COPYRIGHT KIPO 2014