SWING CONTROL DEVICE FOR EXCAVATOR

摘要

The device offering proper brake power, prevents the breakage of the torque reduction gear from the overloaded torque applied when the rotary section is braked. The device comprises a lever (1) for manipulating the turning of the rotary section; a CPU (2) for processing the control according to the input signal from the lever (1); a relay (3) for operating a solenoid valve (4) by receiving the impressed signal from the CPU; the solenoid valve (4) for controlling the on/off valve (6) to operate/release the mechanical brake (5) driven by the relay. When the rotary section is turned, the mechanical brake is released and simultaneously the rotation motor is operated by switching on the on/off valve when the rotation is stopped, the rotating speed is reduced in five seconds by the reaction of the hydraulic power and the mechanical brake is operated.