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Hydraulic shovel

A technology for hydraulic excavators and diesel engines, which is applied in the direction of earth movers/shovels, mechanical equipment, engine components, etc., which can solve the problems of increased bracket weight and increased bracket burden, and achieve load reduction and easy connection Effect

Active Publication Date: 2014-07-23
KOMATSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the burden on the bracket for attaching the exhaust treatment device to the engine increases, and if the bracket is enlarged to strengthen the bracket, the weight of the bracket will increase.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] figure 1 A hydraulic excavator 100 according to a first embodiment of the present invention is shown. The hydraulic excavator 100 includes a vehicle body 1 and a work implement 4 .

[0048] The vehicle body 1 has a running body 2 and a revolving body 3 . The running body 2 has a pair of running devices 2a, 2b. The travel device 2a has crawler belts 2d, and the travel device 2b has crawler belts 2e. Traveling device 2a, 2b utilizes engine 21 (referring to figure 2 ) driving force to drive the crawlers 2d, 2e, so that the hydraulic excavator 100 travels.

[0049] In addition, in the following description, "the front-back direction" means the front-back direction of the vehicle main body 1. As shown in FIG. In other words, the "front-rear direction" is the front-rear direction seen from the operator seated in the cab 5 . In addition, "left-right direction" or "sideways" refers to the vehicle width direction of the vehicle body 1 . In other words, "left-right direct...

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PUM

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Abstract

A diesel particulate collection filter device (41) and a selective reduction catalyst device (42) are supported by a vehicle frame (27). A connection pipe (51) has an expanding / contracting bellows section (54) in at least part thereof. The connection pipe (51) connects the engine (21) and the diesel particulate collection filter device (41). The diesel particulate collection filter device (41) is positioned further away from the engine (21) than the selective reduction catalyst device (42), in a first direction above the horizontal plane. A first main body pipe section (410) of the diesel particulate collection filter device (41) and a second main body pipe section (420) of the selective reduction catalyst device (42) are arranged separated by a space, in the planar view.

Description

technical field [0001] The invention relates to a hydraulic excavator. Background technique [0002] The hydraulic excavator is equipped with an exhaust treatment device. The exhaust treatment device is connected to the engine via a connection pipe in order to treat exhaust gas from the engine. The exhaust treatment device includes a diesel particulate filter device and a selective catalytic reduction device. Diesel particulate filters reduce particulate matter in the exhaust. The selective catalytic reduction unit reduces nitrogen oxides (NOx) in the exhaust. [0003] If the exhaust treatment device is mounted on the engine and supported by the engine, a heavy object will be placed on the upper part of the engine. Therefore, the burden on the bracket for attaching the exhaust treatment device to the engine increases, and if the bracket is enlarged to reinforce the bracket, the weight of the bracket will increase. [0004] Therefore, it is preferable to attach the exhau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28B60K13/04E02F9/00F01N3/08F01N3/24
CPCF01N3/08F01N3/24F01N3/28E02F9/0866F01N3/2066F01N13/1816F01N3/023F01N2610/02F01N3/035F01N2340/00F01N2340/04F01N2590/08Y02A50/20Y02T10/12B60K13/04E02F9/00F01N3/00F01N3/021F01N3/033F01N3/2882
Inventor 森贞志樋本学西村脩真田健司
Owner KOMATSU LTD