Patent ID: 8668041
Filing Date: 2014-03-11
Classification: B62D,E02F

Abstract:
1. A construction machine having a platform for maintenance work, comprising: a lower propelling body; an upper slewing body mounted on the lower propelling body through a slewing bearing slewably about an axis perpendicular to a ground surface, the upper slewing body having a rear region provided with an engine room having an upward-facing opening and housing a plurality of equipment including an engine, and an engine cover for selectively opening and closing the opening of the engine room; and a slewing device for slewing the upper slewing body, the slewing device including: a slewing electric motor having an electric-motor output shaft; a speed reducer having a speed-reducer output shaft, the speed reducer being coupled to the electric-motor output shaft such that the speed-reducer output shaft is rotated, according to rotation of the electric-motor output shaft, at a speed lower than that of the rotation; and a platform cover, wherein: the speed reducer is installed forward of the engine room, the speed-reducer output shaft of the speed reducer extending vertically and pointing downward; the slewing electric motor is disposed forward of the engine room and just above the speed reducer, the electric-motor output shaft of the slewing electric motor vertically extending in parallel with the speed reducer output shaft of the speed reducer; and the platform cover is provided on a top of the slewing electric motor, and has a flat upper surface located at a platform position which is higher than the speed reducer and the slewing electric motor while being lower than the engine cover and adjacent to a front side of the engine room to serve as a platform for maintenance work of equipment housed in the engine room.