Patent ID: 8992368
Filing Date: 2015-03-31
Classification: E02F,F16H,H02K

Abstract:
1. A drive apparatus for a construction machine, comprising: a hydraulic or electric motor having a motor shaft and serving as a drive source; a speed reducer unit having a speed reducer output shaft for receiving rotation force from the motor shaft and transmitting the rotation force to a driven portion, and a casing having lubricating oil injected therein, the speed reducer unit transmitting the rotation force of the motor to the driven portion while reducing speed of the rotation force, the driven portion being provided in an upper slewing body, a lower propelling body or a winch of the construction machine; and a cooler formed with a coolant path through which liquid or gas for cooling the lubricating oil passes as a cooling medium, wherein the motor and the speed reducer unit are provided in a row in an apparatus-axis direction such that the motor shaft and the speed reducer output shaft are arranged along a same line, the casing of the speed reducer unit includes a peripheral wall surrounding the same line, the cooler includes a cooling portion disposed at a position closer to the same line than the peripheral wall, the cooling portion having the coolant path, and the cooler is provided in a row with the speed reducer unit in the apparatus-axis direction in a state where at least the cooling portion of the cooler is immersed in the lubricating oil so as to enable heat exchange with the lubricating oil.