Rotary mechanism of excavator work arm

The utility model discloses a rotary mechanism of excavator work arm belongs to engineering machine tool technical field, support including the gyration, the gyration is supported the inner circle and is used for the swivel mount of steady job arm through bolted connection no. 1, the swivel mount sets up and to support the place ahead in the gyration, the gyration support the outer lane through bolted connection no. 1 be used for with excavator base machine fixed connection's link, the link sets up and supports the rear in the gyration, still is fixed with a speed reducer on the link, and the reducer output axle passes through drive gear and supports inner circle fixed connection with the gyration, a fixed stopper on the swivel mount circumference, the fixed limiting plate that is provided with on the link, the limiting plate tip extends to the swivel mount top, and the limiting plate setting is at the stopper along with on the swivel mount pivoted movement track. The utility model discloses stable in structu