CONSTRUCTION MACHINE DRIVE DEVICE

摘要

A drive device for a construction machine, which includes: a motor as a drive source; a speed reducer configured to transmit a rotation of the motor to a driven unit at a reduced speed; and a brake mechanism configured to generate a braking force against the rotation to be transmitted from the speed reducer to the driven unit, wherein the speed reducer has a casing in which lubricating oil and the brake mechanism are provided, and wherein the brake mechanism includes: a ring-shaped brake piston; and a brake plate configured to generate the braking force by means of a pressing force of the brake piston, and wherein the brake piston has: a plurality of oil pockets provided in the brake piston at respective positions along a circumferential direction of the brake piston, each of the oil pockets formed as a space capable of storing lubricating oil; oil inlets allowing lubricating oil rising during operation of the drive device to be introduced into the oil pockets respectively; and oil outlets allowing lubricating oil stored in the respective oil pockets to be discharged.