Work Machine

Patent metadata

Field	Value
Publication number	US-2016010308-A1
Application number	US-201414771435-A
Country	US
Kind code	A1
Filing date	Apr 4, 2014
Priority date	Apr 8, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

A work machine includes: a vehicle body frame of the work machine; an engine mounted on the vehicle body frame; an engine cover covering over a top of the engine and fixed to the vehicle body frame via a column; a first exhausting device having a tubular appearance; a second exhausting device having a tubular appearance and having a function different from that of the first exhausting device; and a bracket holding the first exhausting device in an upper holding part and the second exhausting device in a lower holding part to attach them on a bottom surface of the engine cover. The bracket integrally holds the first and second exhausting devices in such a manner that an extending direction of the first exhausting device and an extending direction of the second exhausting device are generally parallel, seen from above, and a part of the first exhausting device and a part of the second exhausting device overlap each other, seen from above, while fixing the first and second exhausting devices below the engine cover.
is

First claim

1 . A work machine, comprising:
a vehicle body frame ( 120 ) of the work machine; an engine ( 301 ) mounted on the vehicle body frame ( 120 ); an engine cover ( 140 ) covering over a top of the engine ( 301 ) and fixed to the vehicle body frame via a column ( 161 ); a first exhausting device ( 410 ) having a tubular appearance; a second exhausting device ( 420 ) having a tubular appearance and having a function different from that of the first exhausting device ( 410 ); and a bracket ( 500 ) holding the first exhausting device ( 410 ) in an upper holding part ( 511 , 512 ) and the second exhausting device ( 420 ) in a lower holding part ( 513 ) to attach the first exhausting device and the second exhausting device on a bottom surface of the engine cover ( 140 ), wherein: the bracket ( 500 ) integrally holds the first and second exhausting devices ( 410 , 420 ) in such a manner that an extending direction of the first exhausting device ( 410 ) and an extending direction of the second exhausting device ( 420 ) are generally parallel, seen from above, and a part of the first exhausting device ( 410 ) and a part of the second exhausting device ( 420 ) overlap each other, seen from above, while fixing the first and. second exhausting devices ( 410 , 420 ) below the engine cover ( 140 ).

2 . The work machine according to claim 1 , wherein:
the bracket ( 500 ) integrally holds the first and second exhausting devices ( 410 , 420 ) in such a manner that a center axis extending in the extending direction of the first exhausting device ( 410 ) and a center axis extending in the extending direction of the second exhausting device ( 420 ) do not overlap each other, seen from above.

3 . The work machine according to claim 1 , wherein:
the engine ( 301 ) is a diesel engine; the first exhausting device is an oxidation catalyst device ( 4100 ); and the second exhausting device is a muffling device ( 4200 ).

4 . The work machine according to claim 1 , wherein:
the engine ( 301 ) is a diesel engine; the first exhausting device is an urea SCR (Selective Catalytic Reduction) device ( 4300 ); and the second exhausting device is a DPF (Diesel Particulate Filter) device ( 4400 ).

5 . The work machine according to claim 1 , wherein:
the engine ( 301 ) is a diesel engine; the first exhausting device is an oxidation catalyst device ( 4100 ); and the second exhausting device is an urea SCR (Selective Catalytic Reduction device ( 4300 ).

Assignees

• Hitachi Construction Machinery

Inventors

• Shimohira Akira
• Aoki Tadayoshi
• Yada Hiroaki

Classifications

• F01N3/035

  with catalytic reactors · CPC title

• F01N3/2882

  Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices (combined with absorbents or adsorbents only F01N3/0814; combined with particulate filters F01N3/035) · CPC title

• F01N13/009

  having two or more separate purifying devices arranged in series · CPC title

• B62D63/02

  Motor vehicles · CPC title

• B62D25/12

  Parts or details thereof (locks E05B, {E05B83/16; devices for holding open E05C17/00, e.g. while carrying oversize objects E05C17/042}; hinges E05D; counterbalancing means E05F; {checks, stops, buffers E05F5/00; } springs, {e.g. pneumatic springs} F16F) · CPC title