EXCAVATOR PIVOT APPARATUS PROVIDED WITH PIVOT THRUST PREVENTION DEVICE

Provided is a swing device of an excavator having an anti-sliding device, which includes a brake channel connected to a hydraulic chamber of a brake piston, a select valve for connecting the brake channel to a brake hydraulic port or a delay channel, a spring compartment channel having one side connected to a spring compartment of the brake piston and the other side connected to one point of the delay channel, a check valve provided at the spring compartment channel to allow a hydraulic pressure to be supplied only in a direction from the delay channel toward the spring compartment, a spring compartment bypass channel for connecting one point of the spring compartment channel between the spring compartment and the check valve and one point of the spring compartment channel between the check valve and the delay channel, an anti-sliding valve provided at the spring compartment bypass channel to block or open the spring compartment bypass channel, a slope detection sensor provided at one side of the excavator to sense a slope, and an anti-sliding valve controller for blocking the anti-sliding valve when the excavator located on a slope and opening the anti-sliding valve when the excavator is located at a place other than a slope, based on slope information of the slope detection sensor.