SWING MOTOR FOR EXCAVATOR INCLUDING TIME DELAY VALVE OF PRESSURE CONTROL TYPE

摘要

PURPOSE: A swing motor for an excavator including a pressure control type time delay valve is provided to prevent impacts due to inertia in advance by controlling discharge pressure in the operation of a brake and delaying the operation time of a parking brake. CONSTITUTION: A swing motor (100) for an excavator including a pressure control type time delay valve comprises a hydraulic fluid chamber (110), a parking brake (130), and a time delay valve (150). The time delay valve is connected to a parking brake to delay the operation time of the parking brake through a pressure control. The time delay valve comprises a pressure part (151), a spool part (152), an orifice (153), and a connection pipe (154). The parking brake comprises a spring (131), a parking brake piston (132), and a frictional separation plate (133).