Patent ID: 8651218
Filing Date: 2014-02-18
Classification: E02F,F01N

Abstract:
1. A construction machine comprising a muffler including an exhaust-gas purifying device and a plurality of silencers, and muffler mount brackets for attaching the muffler to a fixed portion of the construction machine, wherein the muffler includes: flange coupling portions comprising flanges of the exhaust-gas purifying device and flanges of the silencers, in which the silencers are respectively coupled to entrance and exit sides of the exhaust-gas purifying device by coupling the flanges of the exhaust-gas purifying device and the flanges of the silencers by first bolts and first nuts at a plurality of positions in the circumferential direction; and muffler mounting seats provided integrally with the flanges of the silencers in the flange coupling portions on the entrance and exit sides, the muffler mounting seats protruding toward outer peripheries of the flanges being provided only in lower semi-circumferential portions of the flanges and being attached to the muffler mount brackets by second bolts and second nuts, wherein said lower semi-circumferential portions of the flanges consist of portions located below a horizontal line passing through a center of the silencers, wherein, in a state where all of the pairs of the first bolts and the first nuts are uncoupled, the flanges of the exhaust-gas purifying device and the flanges of the silencers are detachable from each other while the muffler mounting seats are integrally provided with the flanges of the silencers, wherein, in a state where all of the pairs of the second bolts and the second nuts are uncoupled, the muffler mounting seats are detachable from the muffler mount brackets while the muffler mounting seats are integrally provided with the flanges of the silencers, and wherein the muffler mount brackets include a seat coupling portion coupled to the muffler mounting seats only in the lower semi-circumferential portions of the flanges along a circumferential direction of flanges of the silencers.