Title:
EXHAUST PIPE STRUCTURE OF CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JP2015025393
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust pipe structure of a construction machine capable of sufficiently absorbing position displacement between an engine and an exhaust cleaning device, and capable of preventing fatigue breakdown resulting from reduction of a natural frequency.SOLUTION: An exhaust pipe structure of a construction machine is provided with an upstream bellows 31, a central bellows 32 and a downstream bellows 33 having flexibility in a flexural direction, on a second pipe 30 connecting an engine 21 and an exhaust cleaning device 22. By forming, for example, the number of crests of the central bellows 32 of 10, the number of crests of the upstream bellows 31 of 20 and the number of crests of the downstream bellows 33 of 15, the rigidity of the central bellows 32 is set to become relatively high, and the rigidities of the upstream bellows 31 and downstream bellows 33 are set to become relative low.
Inventors:
KAWASHITA MICHIHIRO
MURAKAMI TATSUHIRO
ONO TAKAYUKI
HOSHI AKIO
MURAKAMI TATSUHIRO
ONO TAKAYUKI
HOSHI AKIO
Application Number:
JP2013154464A
Publication Date:
February 05, 2015
Filing Date:
July 25, 2013
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
F01N13/08; B01D53/86; B01D53/94; F01N3/24
Domestic Patent References:
| JP2012171596A | 2012-09-10 | |||
| JPS56136123U | 1981-10-15 |
Attorney, Agent or Firm:
Nagato 侃 2