DRIVE DEVICE AND CONSTRUCTION MACHINE PROVIDED WITH SAME

To obtain a reliable and sufficient air breather function even during an operation on sloping ground while achieving compactness in a height direction and a diametrical direction, the present invention includes a dry brake 16 provided between a motor 1 and a speed reducer 2 and having a brake mechanism for applying a brake to a motor shaft 5 and a brake housing 17 surrounding a brake chamber 18 housing the brake mechanism. The brake housing 17 includes a partition wall 22 that partitions a speed reducer chamber 12 from the brake chamber 18 when penetrated by the motor shaft 5. The partition wall 22 is provided with a shaft sealing mechanism 23 that limits a flow of a lubricating oil O between the partition wall 22 and the motor shaft 5, and an air passage 25 that allows air to flow between the speed reducer chamber 12 and the brake chamber 18 while limiting an inflow of the lubricating oil O into the brake chamber 18 from the speed reducer chamber 12. An air breather for opening the interior of the brake chamber 18 to the atmosphere is formed in the brake 16.