OIL-PRESSURE TYPE EXCAVATOR

PURPOSE:To save energy required for traveling of an oil-pressure excavator by a method in which a driver for propelling device and a power supplier for operation and slewing are provided to the lower traveler and a working machine device, a cabin, a counter weight, and a controller are provided to the upper rotator. CONSTITUTION:A lower traveler 1 is provided with left and right-handed truck frames 2 and 3, each of which is provided with a propelling device 4 consisting of a freely movable wheel 5, a driving wheel 6, upper and lower rotary wheels 7 and 8, and a crawler 9 and engine-related devices such as an engine 10 for traveling, a pump 11, an oil-pressure type motor 12, a radiator 13 and an oil cooler 14. An engine 21, an oil-pressure device 22, and the rotator 25 of the upper slewing device 19 are provided to an axle frame 4' connecting the frames 2 and 3. High-pressure oil is supplied through a swivel joint 20 to the slewing device 19. The slewing device 19 is also provided with a working machine 26, a cabin 27, a counter weight 28, and controllers such as operating valve, control valve, etc.