Construction machine

摘要

The rear wall portion has a curved portion curved in an approximately arc shape in top plan view to serve as a right or left end thereof. An engine is provided on the upper frame at a position in front of the rear wall portion in such a manner that an interspace is formed between the engine and the curved portion. An exhaust aftertreatment device is provided in front of the rear wall portion while being superposed over the interspace. The exhaust aftertreatment device comprises a first treatment section and a second treatment section. The first treatment section and the second treatment section are supported over the upper frame in a posture where respective longitudinal directions of the first and second treatment sections are oriented parallel to each other in top plan view and along the curved portion in top plan view.

主权项

1. A construction machine comprising:
a lower traveling body; an upper frame slewably provided on the lower traveling body; a rear wall portion provided at a rear portion of the upper frame to cover a space over the upper frame from therebehind, the rear wall portion having a curved portion curved in an approximately arc shape in top plan view to serve as a right or left end thereof; an engine provided on the upper frame at a position in front of the rear wall portion in such a manner that an interspace is formed between the engine and the curved portion; an exhaust aftertreatment device configured to treat exhaust gas of the engine, and provided in front of the rear wall portion while being superposed over the interspace, the exhaust aftertreatment device comprising a first treatment section capable of removing a first component contained in the exhaust gas, and a second treatment section capable of removing a second component contained in the exhaust gas, a work implement attached to the upper frame raisably and lowerably about a rotation axis extending along a right-left direction; a hydraulic actuator attached to the work implement; a hydraulic device provided on the upper frame and in front of the exhaust aftertreatment device; and a hydraulic line extending from the hydraulic device to the hydraulic actuator, wherein the first treatment section and the second treatment section are supported over the upper frame in a posture where respective longitudinal directions thereof are oriented parallel to each other in top plan view and along the curved portion in top plan view, and the hydraulic line is disposed in such a manner as to, in a state in which the work implement is raised to a preset maximally raised position, extend rearwardly from the hydraulic device, and then extend upwardly toward the hydraulic actuator via a position in front of the exhaust aftertreatment device.