JP6067314B2 - Construction machinery - Google Patents

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JP6067314B2
JP6067314B2 JP2012225992A JP2012225992A JP6067314B2 JP 6067314 B2 JP6067314 B2 JP 6067314B2 JP 2012225992 A JP2012225992 A JP 2012225992A JP 2012225992 A JP2012225992 A JP 2012225992A JP 6067314 B2 JP6067314 B2 JP 6067314B2
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reducing agent
liquid reducing
agent tank
box member
tank
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JP2014077301A (en
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茂耕 林
茂耕 林
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Sumitomo SHI Construction Machinery Co Ltd
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Sumitomo SHI Construction Machinery Co Ltd
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Description

本発明は、液体還元剤が貯留されるタンクが配置された建設機械に関する。   The present invention relates to a construction machine having a tank in which a liquid reducing agent is stored.

近年、ディーゼルエンジンを搭載した油圧ショベル等の建設機械では、高次の排ガス規制に対応すべく、ディーゼルエンジンの排気系に排ガス処理装置が設置され、ディーゼルエンジンからの排ガスは、排気管の下流側に設けたNOx還元触媒を通って大気中に放出される。   In recent years, construction equipment such as hydraulic excavators equipped with diesel engines has been equipped with exhaust gas treatment devices in the exhaust system of diesel engines to meet higher exhaust gas regulations. Is released into the atmosphere through the NOx reduction catalyst provided in

従来、此種排ガス処理装置としては、尿素水溶液(液体還元剤)を用いた尿素選択還元型のNOx処理装置が多く採択され、尿素水溶液は金属製又は樹脂製の液体還元剤用タンクに貯留されている。また、液体還元剤用タンクは液体還元剤供給パイプにより排気管に接続され、液体還元剤供給ポンプにより液体還元剤用タンク内の尿素水溶液を排気管に供給できるように構成されている(例えば、特許文献1参照)。   Conventionally, as this kind of exhaust gas treatment device, a urea selective reduction type NOx treatment device using a urea aqueous solution (liquid reducing agent) is often adopted, and the urea aqueous solution is stored in a metal or resin liquid reducing agent tank. ing. Further, the liquid reducing agent tank is connected to the exhaust pipe by a liquid reducing agent supply pipe, and is configured so that the urea aqueous solution in the liquid reducing agent tank can be supplied to the exhaust pipe by the liquid reducing agent supply pump (for example, Patent Document 1).

特開2003−20936号公報JP 2003-20936 A

しかしながら、液体還元剤用タンクを上部旋回体に設置する場合、液体還元剤用タンクを振動から適切に保護する必要がある。特に建設機械は、過酷な環境下での作業が多いので、液体還元剤用タンクを上部旋回体に例えばボルト等で固定した場合、液体還元剤用タンクの固定部に破損が生じる可能性が高くなる。   However, when the liquid reducing agent tank is installed on the upper swing body, it is necessary to appropriately protect the liquid reducing agent tank from vibration. In particular, since construction machines often perform work in harsh environments, when the liquid reducing agent tank is fixed to the upper rotating body with, for example, bolts, there is a high possibility that the fixing portion of the liquid reducing agent tank will be damaged. Become.

また、液体還元剤用タンク内の液体還元剤(例えば尿素水溶液)は、低温環境下で凍結して膨張するが、かかる膨張時に伴って液体還元剤用タンクが変形すると、液体還元剤用タンクの破損や周辺部品との干渉が生じる虞もある。   In addition, the liquid reducing agent (for example, aqueous urea solution) in the liquid reducing agent tank freezes and expands in a low temperature environment, but if the liquid reducing agent tank is deformed during such expansion, the liquid reducing agent tank There is also a risk that damage and interference with peripheral parts may occur.

そこで、本発明は、膨張液体還元剤用タンクの破損等を防止しつつ、フレームに対して液体還元剤用タンクを適切に拘束することができる建設機械の提供を目的とする。   Accordingly, an object of the present invention is to provide a construction machine capable of appropriately restraining the liquid reducing agent tank with respect to the frame while preventing the expansion liquid reducing agent tank from being damaged.

上記目的を達成するため、本発明の一局面によれば、上部旋回体を有する建設機械の上部旋回体の右前方かつ、ブーム支持ブラケットの外側に配置され、液体還元剤が貯留され、樹脂により形成される液体還元剤用タンクと、
前記液体還元剤用タンクが内部に収容され、建設機械のフレームに固定される箱部材と、
前記箱部材の上部に設けられ、前記液体還元剤用タンクの上面の一部に作用して前記液体還元剤用タンクの上方への移動を抑制する拘束部材とを備え
前記液体還元剤用タンクの前側の側面の上部は、傾斜面を備え、前記傾斜面を備える前記液体還元剤用タンクの前側の側面は、ブーム支持ブラケットのブームフートピン用穴よりも後方に位置し、
前記拘束部材は、前記液体還元剤用タンクの前記傾斜面に沿った傾斜面を備えることを特徴とする、建設機械が提供される。
In order to achieve the above object, according to one aspect of the present invention, a liquid reductant is stored and disposed on the right front of an upper swing body of a construction machine having an upper swing body and outside a boom support bracket. A liquid reducing agent tank formed;
A box member accommodated inside the liquid reducing agent tank and fixed to a frame of a construction machine;
A restraining member provided on an upper portion of the box member and acting on a part of the upper surface of the liquid reducing agent tank to suppress the upward movement of the liquid reducing agent tank ;
The upper part of the front side surface of the liquid reductant tank has an inclined surface, and the front side surface of the liquid reductant tank with the inclined surface is positioned behind the boom foot pin hole of the boom support bracket. And
A construction machine is provided in which the restraining member includes an inclined surface along the inclined surface of the liquid reducing agent tank .

本発明によれば、膨張液体還元剤用タンクの破損等を防止しつつ、フレームに対して液体還元剤用タンクを適切に拘束することができる。   According to the present invention, it is possible to appropriately restrain the liquid reducing agent tank with respect to the frame while preventing the expansion liquid reducing agent tank from being damaged.

建設機械の一例として油圧ショベルを示す側面図である。It is a side view which shows the hydraulic shovel as an example of a construction machine. 上部旋回体の後部を上面視で概略的に示す平面図である。It is a top view which shows roughly the rear part of an upper revolving body by upper surface view. 液体還元剤用タンク70の設置状態を概略的に示す斜視図である。FIG. 5 is a perspective view schematically showing an installed state of a liquid reducing agent tank 70. 液体還元剤用タンク70の搭載構造の一例を示す斜視図である。3 is a perspective view showing an example of a mounting structure of a liquid reducing agent tank 70. FIG. 図4に示す例における収容状態の液体還元剤用タンク70を示す斜視図である。It is a perspective view which shows the tank 70 for liquid reducing agents of the accommodation state in the example shown in FIG. 液体還元剤用タンク70の搭載構造の他の一例を示す斜視図である。It is a perspective view which shows another example of the mounting structure of the tank 70 for liquid reducing agents. 液体還元剤用タンク70の搭載構造の更なる他の一例を示す斜視図である。It is a perspective view which shows another example of the mounting structure of the tank for liquid reducing agents. 図7に示す液体還元剤用タンク70の搭載構造において箱部材72等を半透視して示す斜視図である。FIG. 8 is a perspective view showing the box member 72 and the like in a semi-transparent manner in the mounting structure of the liquid reducing agent tank 70 shown in FIG. 7. 図7に示す液体還元剤用タンク70の搭載構造において箱部材72等を半透視して示す斜視図である。FIG. 8 is a perspective view showing the box member 72 and the like in a semi-transparent manner in the mounting structure of the liquid reducing agent tank 70 shown in FIG. 7.

以下、図面を参照して、本発明を実施するための最良の形態の説明を行う。   The best mode for carrying out the present invention will be described below with reference to the drawings.

図1は、建設機械の一例として油圧ショベルを示す側面図である。   FIG. 1 is a side view showing a hydraulic excavator as an example of a construction machine.

図1に示すように、下部走行体1上には上部旋回体2が旋回可能に装架され、上部旋回体2の前方一側部にキャブ3が設けられている。また、上部旋回体2の前方中央部にブーム4が俯仰可能に枢着され、該ブーム4の先端部にはアーム5が上下回動可能に連結されているとともに、該アーム5の先端部にバケット6が上下回動可能に取り付けられている。尚、掘削アタッチメントは、ブレーカや破砕機等のような他のアタッチメントであってもよい。   As shown in FIG. 1, an upper swing body 2 is mounted on the lower traveling body 1 so as to be swingable, and a cab 3 is provided on one front side of the upper swing body 2. In addition, the boom 4 is pivotally attached to the front center portion of the upper swing body 2 so that the boom 4 can be raised and lowered, and an arm 5 is connected to the distal end portion of the boom 4 so as to be rotatable up and down. A bucket 6 is attached so as to be rotatable up and down. The excavation attachment may be another attachment such as a breaker or a crusher.

図2は、上部旋回体の後部を上面視で概略的に示す平面図である。   FIG. 2 is a plan view schematically showing the rear part of the upper swing body in a top view.

図2に示すように、上部旋回体2の後部にはエンジンルーム7が形成され、該エンジンルーム7内にはディーゼルエンジン8が設置されている。また、ディーゼルエンジン8の前方側(図2における手前側)には冷却ファン12が設けられているとともに、該冷却ファン12の前方にはラジエータ等を含む熱交換機ユニット13が設置されている。   As shown in FIG. 2, an engine room 7 is formed at the rear of the upper swing body 2, and a diesel engine 8 is installed in the engine room 7. A cooling fan 12 is provided in front of the diesel engine 8 (front side in FIG. 2), and a heat exchanger unit 13 including a radiator and the like is installed in front of the cooling fan 12.

更に、ディーゼルエンジン8には排気管9が接続され、該排気管9の下流側には、高次の排ガス規制に対応すべく、排ガス処理装置10が設置されている。排ガス処理装置10としては、尿素水溶液(液体還元剤)を用いた尿素選択還元型のNOx処理装置が採択されている。   Further, an exhaust pipe 9 is connected to the diesel engine 8, and an exhaust gas treatment device 10 is installed on the downstream side of the exhaust pipe 9 in order to comply with higher-order exhaust gas regulations. As the exhaust gas treatment device 10, a urea selective reduction type NOx treatment device using an aqueous urea solution (liquid reducing agent) is adopted.

図3は、液体還元剤用タンク70の設置状態を概略的に示す斜視図である。   FIG. 3 is a perspective view schematically showing an installed state of the liquid reducing agent tank 70.

図3に示すように、上部旋回体2の旋回フレーム14の前部には左右一対のブーム取り付け用の支持ブラケット17L,17Rが立設されている。また、支持ブラケット17Lの外側であって、後方には燃料タンク18及びサンプタンク19が直列に配置されている。また、燃料タンク18の前側には、液体還元剤用タンク70が配置される。従って、図示の例では、前から液体還元剤用タンク70、燃料タンク18及びサンプタンク19が順に隣接して配置されている。尚、燃料タンク18及びサンプタンク19の順序は任意である。燃料タンク18及びサンプタンク19は、幅方向に横並びに配置されてもよい。   As shown in FIG. 3, a pair of left and right boom mounting support brackets 17 </ b> L and 17 </ b> R are erected on the front portion of the revolving frame 14 of the upper revolving structure 2. In addition, a fuel tank 18 and a sump tank 19 are arranged in series on the rear side of the support bracket 17L. A liquid reducing agent tank 70 is disposed on the front side of the fuel tank 18. Accordingly, in the illustrated example, the liquid reducing agent tank 70, the fuel tank 18, and the sump tank 19 are arranged adjacently in order from the front. The order of the fuel tank 18 and the sump tank 19 is arbitrary. The fuel tank 18 and the sump tank 19 may be arranged side by side in the width direction.

液体還元剤用タンク70は、樹脂材料から形成される。液体還元剤用タンク70内には尿素水溶液が貯留されている。更に、液体還元剤用タンク70は液体還元剤供給パイプ(図示せず)を介して、排ガス処理装置10に接続されている。液体還元剤用タンク70は、前側の側面がブーム支持ブラケット17L,17Rの穴172L,172Rよりも後方に位置するように配置される。尚、図3では、液体還元剤用タンク70は、非常に概略的に示されている。液体還元剤用タンク70のより詳細な構造等については、図4以降に図示される。   The liquid reducing agent tank 70 is made of a resin material. An aqueous urea solution is stored in the liquid reducing agent tank 70. Further, the liquid reducing agent tank 70 is connected to the exhaust gas treatment apparatus 10 via a liquid reducing agent supply pipe (not shown). The liquid reducing agent tank 70 is disposed such that the front side surface is located behind the holes 172L and 172R of the boom support brackets 17L and 17R. In FIG. 3, the liquid reducing agent tank 70 is shown very schematically. A more detailed structure and the like of the liquid reducing agent tank 70 are shown in FIG.

図4は、液体還元剤用タンク70の搭載構造の一例を示す斜視図である。図5は、図4に示す例における収容状態の液体還元剤用タンク70を示す斜視図である。   FIG. 4 is a perspective view showing an example of a mounting structure of the liquid reducing agent tank 70. FIG. 5 is a perspective view showing the liquid reducing agent tank 70 in the accommodated state in the example shown in FIG.

図4に示す例では、液体還元剤用タンク70は、箱部材72内に収容される。液体還元剤用タンク70は、略直方体の形態を有するが、液体還元剤用タンク70の形状は任意である。尚、液体還元剤用タンク70が箱部材72内に収容された状態において、液体還元剤用タンク70と箱部材72の側壁724との間には、所定の隙間(例えば、2mm程度の隙間)が設定されていてもよい。箱部材72は、金属材料から形成される。箱部材72は、上部旋回体2の旋回フレーム14上に載置されて、上部旋回体2の旋回フレーム14に固定される。箱部材72は、例えば図4に示すように、ボルト80により旋回フレーム14に固定されてもよい。図4に示す例では、箱部材72は、底面に補強部材722を備え、補強部材722にボルト締結部が設定される。尚、補強部材722は、箱部材72に溶接等により固定されてよい。   In the example shown in FIG. 4, the liquid reducing agent tank 70 is accommodated in the box member 72. The liquid reducing agent tank 70 has a substantially rectangular parallelepiped shape, but the shape of the liquid reducing agent tank 70 is arbitrary. In a state where the liquid reducing agent tank 70 is accommodated in the box member 72, a predetermined gap (for example, a gap of about 2 mm) is provided between the liquid reducing agent tank 70 and the side wall 724 of the box member 72. May be set. The box member 72 is formed from a metal material. The box member 72 is placed on the swing frame 14 of the upper swing body 2 and fixed to the swing frame 14 of the upper swing body 2. For example, as shown in FIG. 4, the box member 72 may be fixed to the revolving frame 14 with bolts 80. In the example shown in FIG. 4, the box member 72 includes a reinforcing member 722 on the bottom surface, and a bolt fastening portion is set on the reinforcing member 722. The reinforcing member 722 may be fixed to the box member 72 by welding or the like.

箱部材72の内部には、図5に示すように、液体還元剤用タンク70が収容される。箱部材72内に収容された液体還元剤用タンク70の上部は、拘束部材90にて拘束される。拘束部材90は、液体還元剤用タンク70の上方を押さえ、液体還元剤用タンク70の上方への移動を抑制する。これにより、箱部材72と液体還元剤用タンク70とは、ボルト等によって互いに結合されなくても、液体還元剤用タンク70は拘束部材90と箱部材72の側壁724及び底面によって、箱部材72内に収容された状態に保持される。尚、図5に示す例では、拘束部材90は、バンドの形態であり、拘束部材90は、箱部材72に形成されたバンド留め部721に固定される。   As shown in FIG. 5, a liquid reducing agent tank 70 is accommodated in the box member 72. The upper portion of the liquid reducing agent tank 70 accommodated in the box member 72 is restrained by the restraining member 90. The restraining member 90 holds down the liquid reducing agent tank 70 and suppresses the upward movement of the liquid reducing agent tank 70. As a result, even if the box member 72 and the liquid reducing agent tank 70 are not coupled to each other by bolts or the like, the liquid reducing agent tank 70 is separated from the box member 72 by the restraint member 90 and the side wall 724 and the bottom surface of the box member 72. It is held in a state accommodated inside. In the example shown in FIG. 5, the restraining member 90 is in the form of a band, and the restraining member 90 is fixed to a band fastening portion 721 formed on the box member 72.

図4及び図5に示す例によれば、液体還元剤用タンク70が箱部材72内に収容されるので、物理的な規制が液体還元剤用タンク70の側面にかかる。即ち、液体還元剤用タンク70の側面は、箱部材72の側壁724により面で拘束される。これにより、尿素水溶液の凍結時に、尿素水溶液の膨張に伴い液体還元剤用タンク70の側面が変形する(外方に膨らむ態様で変形する)のが規制され、液体還元剤用タンク70の破損や周辺部品との干渉を適切に防止することができる。   According to the example shown in FIGS. 4 and 5, since the liquid reducing agent tank 70 is accommodated in the box member 72, physical regulation is applied to the side surface of the liquid reducing agent tank 70. That is, the side surface of the liquid reducing agent tank 70 is restrained by the surface by the side wall 724 of the box member 72. As a result, when the urea aqueous solution is frozen, the side surface of the liquid reducing agent tank 70 is restricted from being deformed (deformed in a state of swelling outward) as the urea aqueous solution expands. Interference with peripheral parts can be prevented appropriately.

また、図4及び図5に示す例によれば、金属材料からなる箱部材72が旋回フレーム14に対して固定され(例えばボルト80により締結され)、樹脂材料からなる液体還元剤用タンク70自体はボルト等により直接的に旋回フレーム14や箱部材72に対して固定されない。これにより、箱部材72と旋回フレーム14との間の結合部が金属同士で強固となるので、旋回フレーム14の振動が箱部材72と旋回フレーム14との間の結合部に繰り返し作用しても、箱部材72と旋回フレーム14との間の結合部の破損を適切に防止することができる。   4 and 5, the box member 72 made of a metal material is fixed to the revolving frame 14 (for example, fastened by a bolt 80), and the liquid reducing agent tank 70 itself made of a resin material is used. Is not directly fixed to the revolving frame 14 or the box member 72 by bolts or the like. As a result, the joint between the box member 72 and the swivel frame 14 is made of metal, so that even if the vibration of the swivel frame 14 repeatedly acts on the joint between the box member 72 and the swivel frame 14. Further, it is possible to appropriately prevent breakage of the joint portion between the box member 72 and the swivel frame 14.

尚、箱部材72の側壁724による液体還元剤用タンク70の側面の拘束(液体還元剤用タンク70の面直方向の変位・変形に対する規制)を確実にするため、好ましくは、箱部材72は、液体還元剤用タンク70の鉛直方向に延在する平面状の鉛直側面部70aの略全体をカバーする態様の側壁724を有する。即ち、箱部材72の側壁724の高さは、好ましくは、液体還元剤用タンク70の平面状の鉛直側面部70aの高さと同一又はそれよりも高い。尚、図4及び図5に示す例では、箱部材72は、液体還元剤用タンク70の平面状の鉛直側面部70aの全体を完全にカバーしていないが、液体還元剤用タンク70の平面状の鉛直側面部70aの約7割以上(鉛直側面部70aの略全体)をカバーしている。これにより、箱部材72の側壁724による液体還元剤用タンク70の側面の拘束を確実に実現することができ、液体還元剤用タンク70の破損や周辺部品との干渉を適切に防止することができる。   In order to ensure the restraint of the side surface of the liquid reducing agent tank 70 by the side wall 724 of the box member 72 (regulation against displacement / deformation in the direction perpendicular to the surface of the liquid reducing agent tank 70), preferably the box member 72 is The side wall 724 of the aspect which covers the substantially whole planar vertical side part 70a extended in the perpendicular direction of the tank 70 for liquid reducing agents is provided. That is, the height of the side wall 724 of the box member 72 is preferably equal to or higher than the height of the planar vertical side surface portion 70 a of the liquid reducing agent tank 70. In the example shown in FIGS. 4 and 5, the box member 72 does not completely cover the entire planar vertical side surface 70 a of the liquid reducing agent tank 70. About 70% or more of the vertical vertical side surface portion 70a (substantially the entire vertical side surface portion 70a). Thus, the side surface of the liquid reducing agent tank 70 can be reliably restrained by the side wall 724 of the box member 72, and damage to the liquid reducing agent tank 70 and interference with peripheral components can be prevented appropriately. it can.

図6は、液体還元剤用タンク70の搭載構造の他の一例を示す斜視図である。   FIG. 6 is a perspective view showing another example of the mounting structure of the liquid reducing agent tank 70.

図6に示す例では、液体還元剤用タンク70と箱部材72との間に緩衝材92が設けられる。緩衝材92は、例えばゴムや軟質樹脂からなるラバープレートや樹脂シートの形態であってよい。緩衝材92は、変形可能であり、液体還元剤用タンク70と箱部材72の側壁724との間の隙間を埋める。緩衝材92は、液体還元剤用タンク70と箱部材72との間の直接的な干渉(当たり)を防止する機能を果たす。緩衝材92は、液体還元剤用タンク70と箱部材72から独立して設けられてもよいし、液体還元剤用タンク70又は箱部材72に予め取り付けられていてもよい。例えば、緩衝材92は、液体還元剤用タンク70に貼り付けられ、液体還元剤用タンク70は、緩衝材92が貼り付けられた状態で、箱部材72内に収容されてもよい。   In the example shown in FIG. 6, a buffer material 92 is provided between the liquid reducing agent tank 70 and the box member 72. The buffer material 92 may be in the form of a rubber plate or a resin sheet made of, for example, rubber or soft resin. The buffer material 92 is deformable and fills the gap between the liquid reducing agent tank 70 and the side wall 724 of the box member 72. The buffer material 92 functions to prevent direct interference (striking) between the liquid reducing agent tank 70 and the box member 72. The buffer material 92 may be provided independently of the liquid reducing agent tank 70 and the box member 72, or may be attached in advance to the liquid reducing agent tank 70 or the box member 72. For example, the buffer material 92 may be attached to the liquid reducing agent tank 70, and the liquid reducing agent tank 70 may be accommodated in the box member 72 in a state where the buffer material 92 is attached.

尚、緩衝材92は、1箇所以上の任意の箇所に設けられてよい。例えば、緩衝材92は、液体還元剤用タンク70の四方の側面の各面に設けられてよく、また、液体還元剤用タンク70の底面に設けられてもよい。   Note that the cushioning material 92 may be provided at one or more arbitrary locations. For example, the buffer material 92 may be provided on each of the four side surfaces of the liquid reducing agent tank 70, or may be provided on the bottom surface of the liquid reducing agent tank 70.

図6に示す例によれば、液体還元剤用タンク70が箱部材72内に収容されるので、物理的な規制が緩衝材92を介して液体還元剤用タンク70の側面にかかる。即ち、液体還元剤用タンク70の側面は、緩衝材92を介して箱部材72の側壁724により面で拘束される。これにより、尿素水溶液の凍結時に、尿素水溶液の膨張に伴い液体還元剤用タンク70の側面が変形する(外方に膨らむ態様で変形する)のが規制され、液体還元剤用タンク70の破損や周辺部品との干渉を適切に防止することができる。   According to the example shown in FIG. 6, since the liquid reducing agent tank 70 is accommodated in the box member 72, physical restriction is applied to the side surface of the liquid reducing agent tank 70 through the buffer material 92. That is, the side surface of the liquid reducing agent tank 70 is constrained by the side wall 724 of the box member 72 via the buffer material 92. As a result, when the urea aqueous solution is frozen, the side surface of the liquid reducing agent tank 70 is restricted from being deformed (deformed in a state of swelling outward) as the urea aqueous solution expands. Interference with peripheral parts can be prevented appropriately.

また、図6に示す例によれば、図4及び図5に示した例と同様に、金属材料からなる箱部材72が旋回フレーム14に対して固定され(例えばボルト80により締結され)、樹脂材料からなる液体還元剤用タンク70自体はボルト等により直接的に旋回フレーム14や箱部材72に対して固定されない。これにより、箱部材72と旋回フレーム14との間の結合部が金属同士で強固となるので、旋回フレーム14の振動が箱部材72と旋回フレーム14との間の結合部に繰り返し作用しても、箱部材72と旋回フレーム14との間の結合部の破損を適切に防止することができる。   Further, according to the example shown in FIG. 6, similarly to the examples shown in FIGS. 4 and 5, the box member 72 made of a metal material is fixed to the revolving frame 14 (for example, fastened by a bolt 80), and resin The liquid reducing agent tank 70 itself made of a material is not directly fixed to the revolving frame 14 or the box member 72 by a bolt or the like. As a result, the joint between the box member 72 and the swivel frame 14 is made of metal, so that even if the vibration of the swivel frame 14 repeatedly acts on the joint between the box member 72 and the swivel frame 14. Further, it is possible to appropriately prevent breakage of the joint portion between the box member 72 and the swivel frame 14.

また、特に、図6に示す例によれば、液体還元剤用タンク70と箱部材72との間に緩衝材92が設けられるので、箱部材72内部で箱部材72の側壁724や底面と液体還元剤用タンク70とが直接干渉することが無くなり、液体還元剤用タンク70の擦れが抑制され、液体還元剤用タンク70の劣化や破損を防止することができる。また、尿素水溶液の膨張に伴い液体還元剤用タンク70の側面が僅かに外方に膨張した場合でも、箱部材72の側壁724と液体還元剤用タンク70とが直接干渉することが無く、液体還元剤用タンク70の擦れ及びそれに伴う劣化や破損を防止することができる。また、作業等において生じる旋回フレーム14の振動時においても、緩衝材92により振動が緩衝されるので、液体還元剤用タンク70の擦れが抑制され、液体還元剤用タンク70の劣化や破損を防止することができる。   In particular, according to the example shown in FIG. 6, since the buffer material 92 is provided between the liquid reducing agent tank 70 and the box member 72, the side wall 724 and the bottom surface of the box member 72 and the liquid inside the box member 72. There is no direct interference with the reducing agent tank 70, rubbing of the liquid reducing agent tank 70 is suppressed, and deterioration or breakage of the liquid reducing agent tank 70 can be prevented. Further, even when the side surface of the liquid reducing agent tank 70 slightly expands outward as the urea aqueous solution expands, the side wall 724 of the box member 72 and the liquid reducing agent tank 70 do not directly interfere with each other, and the liquid It is possible to prevent the reducing agent tank 70 from rubbing and accompanying deterioration or damage. Further, even when the swivel frame 14 vibrates due to work or the like, the vibration is buffered by the buffer material 92, so that the liquid reducing agent tank 70 is prevented from rubbing and the liquid reducing agent tank 70 is prevented from being deteriorated or damaged. can do.

図7は、液体還元剤用タンク70の搭載構造の更なる他の一例を示す斜視図である。図7において、図中のX1,X2方向は、図3のX1,X2方向に対応する。図8及び図9は、図7に示す液体還元剤用タンク70の搭載構造において箱部材72及びブラケット96を半透視(一部点線で図示)して示す斜視図である。   FIG. 7 is a perspective view showing still another example of the mounting structure of the liquid reducing agent tank 70. In FIG. 7, the X1 and X2 directions in the figure correspond to the X1 and X2 directions in FIG. 8 and 9 are perspective views showing the box member 72 and the bracket 96 in a semi-transparent manner (partially shown by dotted lines) in the mounting structure of the liquid reducing agent tank 70 shown in FIG.

図7に示す例においても、同様に、液体還元剤用タンク70は、箱部材72内に収容される。上述した各例と同様に、箱部材72は、底面に補強部材722を備え、補強部材722にボルト締結部が設定される。箱部材72は、同様に、ボルト締結部に締結されるボルト80(図9参照)により旋回フレーム14に固定される。   Also in the example shown in FIG. 7, the liquid reducing agent tank 70 is similarly housed in the box member 72. Similar to each example described above, the box member 72 includes a reinforcing member 722 on the bottom surface, and a bolt fastening portion is set on the reinforcing member 722. Similarly, the box member 72 is fixed to the revolving frame 14 by a bolt 80 (see FIG. 9) fastened to the bolt fastening portion.

図7に示す例では、液体還元剤用タンク70は、略直方体の形態を有するが、液体還元剤用タンク70の前側の側面の上部には、傾斜面70bを備える。即ち、液体還元剤用タンク70の前側の側面は、下方側は鉛直方向に延在する平面状の鉛直側面部70a(図8参照)を備え、上方側は傾斜面70bを備える。傾斜面70bは、上方に向かうにつれて後方側に倒れる態様で傾斜する。かかる傾斜面70bは、液体還元剤用タンク70の前側の側面をブーム支持ブラケット17L,17Rの穴172L,172Rよりも後方に位置させるために形成される。これにより、ブームフートピンの抜き差し作業時におけるブームフートピンと液体還元剤用タンク70との間の干渉が防止され、ブームフートピンの抜き差し作業の作業性が向上する。また、液体還元剤用タンク70の横方向内側の側面についても、図8に示すように、傾斜面70bを備え、傾斜面70bは、更に凹部70cを備える。傾斜面70bは、液体還元剤用タンク70の液体還元剤供給モジュール(液体還元剤供給パイプ等)を配置するためのスペースを確保するために形成される。凹部70cは、液体還元剤用タンク70を箱部材72に対して着脱する際の把持部(持ち手)として機能する。   In the example shown in FIG. 7, the liquid reducing agent tank 70 has a substantially rectangular parallelepiped shape, but includes an inclined surface 70 b at the upper part of the front side surface of the liquid reducing agent tank 70. That is, the front side surface of the liquid reducing agent tank 70 includes a flat vertical side surface portion 70a (see FIG. 8) extending in the vertical direction on the lower side and an inclined surface 70b on the upper side. The inclined surface 70b is inclined in such a manner that the inclined surface 70b falls backward as it goes upward. The inclined surface 70b is formed so that the front side surface of the liquid reducing agent tank 70 is located behind the holes 172L and 172R of the boom support brackets 17L and 17R. Thereby, the interference between the boom foot pin and the liquid reducing agent tank 70 during the boom foot pin insertion / removal operation is prevented, and the workability of the boom foot pin insertion / removal operation is improved. Further, the laterally inner side surface of the liquid reducing agent tank 70 also includes an inclined surface 70b as shown in FIG. 8, and the inclined surface 70b further includes a recess 70c. The inclined surface 70b is formed in order to secure a space for arranging a liquid reducing agent supply module (liquid reducing agent supply pipe or the like) of the liquid reducing agent tank 70. The concave portion 70 c functions as a grip portion (handle) when the liquid reducing agent tank 70 is attached to and detached from the box member 72.

箱部材72は、液体還元剤用タンク70の側面における鉛直側面部70aの全体をカバーする態様の側壁724を有する。即ち、箱部材72の側壁724の高さは、液体還元剤用タンク70の平面状の鉛直側面部70aの高さと同一又はそれよりも高い。図7に示す例では、箱部材72は、液体還元剤用タンク70の鉛直側面部70aの全体を完全にカバーしている。例えば、図7に示す例では、液体還元剤用タンク70の後側の側面は、鉛直方向に延在する平面状の鉛直側面部70aからなり、従って、箱部材72の後側の側壁724は、液体還元剤用タンク70の上面付近まで延在している。また、液体還元剤用タンク70の前側の側面は、上述の如く下方側は鉛直側面部70aを備え、上方側は傾斜面70bを備え、従って、箱部材72の前側の側壁724は、液体還元剤用タンク70の傾斜面70bの下端付近まで延在している。これにより、箱部材72の側壁724による液体還元剤用タンク70の側面の拘束を確実に実現することができ、液体還元剤用タンク70の破損や周辺部品との干渉を適切に防止することができる。   The box member 72 has a side wall 724 that covers the entire vertical side surface portion 70 a on the side surface of the liquid reducing agent tank 70. That is, the height of the side wall 724 of the box member 72 is the same as or higher than the height of the planar vertical side surface 70 a of the liquid reducing agent tank 70. In the example shown in FIG. 7, the box member 72 completely covers the entire vertical side surface portion 70 a of the liquid reducing agent tank 70. For example, in the example shown in FIG. 7, the rear side surface of the liquid reducing agent tank 70 is composed of a vertical vertical side surface portion 70 a extending in the vertical direction, and therefore, the rear side wall 724 of the box member 72 is The liquid reducing agent tank 70 extends to the vicinity of the upper surface thereof. Further, as described above, the front side surface of the liquid reducing agent tank 70 is provided with the vertical side surface portion 70a on the lower side and the inclined surface 70b on the upper side. Therefore, the side wall 724 on the front side of the box member 72 is liquid reduced. The agent tank 70 extends to the vicinity of the lower end of the inclined surface 70b. Thus, the side surface of the liquid reducing agent tank 70 can be reliably restrained by the side wall 724 of the box member 72, and damage to the liquid reducing agent tank 70 and interference with peripheral components can be prevented appropriately. it can.

また、図7に示す例では、箱部材72は、補強リブ74を備える。補強リブ74は、箱部材72に溶接等により固定されてよい。補強リブ74は、箱部材72の前側の側壁724及び後側の側壁724に設けられてよい。箱部材72の前側の側壁724の補強リブ74は、図7に示すように、箱部材72の外側に突出する形態のリブであってよい。他方、箱部材72の後側の側壁724の補強リブ74は、図9に示すように、箱部材72の内側に突出する形態のリブであってよい。これにより、箱部材72の強度を高めることができ、液体還元剤用タンク70等から受ける力等に起因した破損等を防止することができる。尚、液体還元剤用タンク70は、箱部材72の内側に突出する形態の補強リブ74に対応した凹部を有してよい。これにより、箱部材72に対して液体還元剤用タンク70が適切に位置決めされる。   In the example shown in FIG. 7, the box member 72 includes a reinforcing rib 74. The reinforcing rib 74 may be fixed to the box member 72 by welding or the like. The reinforcing ribs 74 may be provided on the front side wall 724 and the rear side wall 724 of the box member 72. As shown in FIG. 7, the reinforcing rib 74 on the front side wall 724 of the box member 72 may be a rib that protrudes to the outside of the box member 72. On the other hand, the reinforcing rib 74 on the side wall 724 on the rear side of the box member 72 may be a rib that protrudes inside the box member 72 as shown in FIG. 9. Thereby, the intensity | strength of the box member 72 can be raised and the damage etc. resulting from the force received from the tank 70 for liquid reducing agents etc. can be prevented. The liquid reducing agent tank 70 may have a recess corresponding to the reinforcing rib 74 that protrudes inside the box member 72. As a result, the liquid reducing agent tank 70 is appropriately positioned with respect to the box member 72.

液体還元剤用タンク70の上部は、拘束部材としてのブラケット96にて拘束される。ブラケット96は、液体還元剤用タンク70の上方への移動を抑制する。これにより、箱部材72と液体還元剤用タンク70とは、ボルト等によって互いに結合されなくても、液体還元剤用タンク70はブラケット96と箱部材72の側壁724及び底面によって、箱部材72内に収容された状態に保持される。尚、図7に示す例では、ブラケット96は、箱部材72に形成されたボルト締結部にボルト97により固定される。また、ブラケット96は、液体還元剤用タンク70の傾斜面70bに沿った傾斜面を備え、液体還元剤用タンク70の上面と共に傾斜面70bを上方から押えて拘束する。   The upper portion of the liquid reducing agent tank 70 is restrained by a bracket 96 as a restraining member. The bracket 96 suppresses the upward movement of the liquid reducing agent tank 70. As a result, even if the box member 72 and the liquid reducing agent tank 70 are not coupled to each other by bolts or the like, the liquid reducing agent tank 70 is contained in the box member 72 by the bracket 96, the side wall 724 and the bottom surface of the box member 72. It is held in a state where it is accommodated. In the example shown in FIG. 7, the bracket 96 is fixed to a bolt fastening portion formed on the box member 72 with a bolt 97. Further, the bracket 96 includes an inclined surface along the inclined surface 70b of the liquid reducing agent tank 70, and restrains the inclined surface 70b together with the upper surface of the liquid reducing agent tank 70 from above.

液体還元剤用タンク70と箱部材72との間には、図6に示した例と同様、緩衝材92が設けられる。図7に示す例では、緩衝材92は、箱部材72と液体還元剤用タンク70との間のみならず、液体還元剤用タンク70とブラケット96との間にも設けられる。箱部材72と液体還元剤用タンク70との間については、図8及び図9に示すように、緩衝材92は、液体還元剤用タンク70の四方の側面の各面と共に、底面にも設けられる。尚、液体還元剤用タンク70とブラケット96との間の緩衝材92は、液体還元剤用タンク70側に取り付けられもよいし、ブラケット96側に取り付けられてもよい。   A buffer material 92 is provided between the liquid reducing agent tank 70 and the box member 72 as in the example shown in FIG. In the example shown in FIG. 7, the buffer material 92 is provided not only between the box member 72 and the liquid reducing agent tank 70 but also between the liquid reducing agent tank 70 and the bracket 96. As shown in FIGS. 8 and 9, between the box member 72 and the liquid reducing agent tank 70, the cushioning material 92 is provided on the bottom surface as well as the four sides of the liquid reducing agent tank 70. It is done. The buffer material 92 between the liquid reducing agent tank 70 and the bracket 96 may be attached to the liquid reducing agent tank 70 side, or may be attached to the bracket 96 side.

図7に示す例によれば、図6に示した例と同様に、液体還元剤用タンク70が箱部材72内に収容されるので、物理的な規制が緩衝材92を介して液体還元剤用タンク70の側面にかかる。即ち、液体還元剤用タンク70の側面は、緩衝材92を介して箱部材72の側壁724により面で拘束される。これにより、尿素水溶液の凍結時に、尿素水溶液の膨張に伴い液体還元剤用タンク70の側面が変形する(外方に膨らむ態様で変形する)のが規制され、液体還元剤用タンク70の破損や周辺部品との干渉を適切に防止することができる。   According to the example shown in FIG. 7, since the liquid reducing agent tank 70 is accommodated in the box member 72 as in the example shown in FIG. 6, the physical restriction is imposed on the liquid reducing agent via the buffer material 92. On the side of the tank 70 for use. That is, the side surface of the liquid reducing agent tank 70 is constrained by the side wall 724 of the box member 72 via the buffer material 92. As a result, when the urea aqueous solution is frozen, the side surface of the liquid reducing agent tank 70 is restricted from being deformed (deformed in a state of swelling outward) as the urea aqueous solution expands. Interference with peripheral parts can be prevented appropriately.

また、図7に示す例によれば、図4及び図5に示した例と同様に、金属材料からなる箱部材72が旋回フレーム14に対して固定され(例えばボルト80により締結され)、樹脂材料からなる液体還元剤用タンク70自体はボルト等により直接的に旋回フレーム14や箱部材72に対して固定されない。これにより、箱部材72と旋回フレーム14との間の結合部が金属同士で強固となるので、旋回フレーム14の振動が箱部材72と旋回フレーム14との間の結合部に繰り返し作用しても、箱部材72と旋回フレーム14との間の結合部の破損を適切に防止することができる。   Further, according to the example shown in FIG. 7, similarly to the examples shown in FIGS. 4 and 5, the box member 72 made of a metal material is fixed to the revolving frame 14 (for example, fastened by a bolt 80), and resin The liquid reducing agent tank 70 itself made of a material is not directly fixed to the revolving frame 14 or the box member 72 by a bolt or the like. As a result, the joint between the box member 72 and the swivel frame 14 is made of metal, so that even if the vibration of the swivel frame 14 repeatedly acts on the joint between the box member 72 and the swivel frame 14. Further, it is possible to appropriately prevent breakage of the joint portion between the box member 72 and the swivel frame 14.

また、図7に示す例によれば、図6に示した例と同様に、液体還元剤用タンク70と箱部材72との間に緩衝材92が設けられるので、箱部材72内部で箱部材72の側壁724や底面と液体還元剤用タンク70とが直接干渉することが無くなり、液体還元剤用タンク70の擦れが抑制され、液体還元剤用タンク70の劣化や破損を防止することができる。また、尿素水溶液の膨張に伴い液体還元剤用タンク70の側面が僅かに外方に膨張した場合でも、箱部材72の側壁724と液体還元剤用タンク70とが直接干渉することが無く、液体還元剤用タンク70の擦れ及びそれに伴う劣化や破損を防止することができる。また、作業等において生じる旋回フレーム14の振動時においても、緩衝材92により振動が緩衝されるので、液体還元剤用タンク70の擦れが抑制され、液体還元剤用タンク70の劣化や破損を防止することができる。   Further, according to the example shown in FIG. 7, as in the example shown in FIG. 6, the buffer member 92 is provided between the liquid reducing agent tank 70 and the box member 72. The side wall 724 and the bottom surface of the liquid reducing agent tank 70 and the liquid reducing agent tank 70 do not directly interfere with each other, rubbing of the liquid reducing agent tank 70 is suppressed, and deterioration or breakage of the liquid reducing agent tank 70 can be prevented. . Further, even when the side surface of the liquid reducing agent tank 70 slightly expands outward as the urea aqueous solution expands, the side wall 724 of the box member 72 and the liquid reducing agent tank 70 do not directly interfere with each other, and the liquid It is possible to prevent the reducing agent tank 70 from rubbing and accompanying deterioration or damage. Further, even when the swivel frame 14 vibrates due to work or the like, the vibration is buffered by the buffer material 92, so that the liquid reducing agent tank 70 is prevented from rubbing and the liquid reducing agent tank 70 is prevented from being deteriorated or damaged. can do.

また、図7に示す例によれば、液体還元剤用タンク70とブラケット96との間に緩衝材92が設けられるので、ブラケット96と液体還元剤用タンク70とが直接干渉することが無くなり、液体還元剤用タンク70の擦れが抑制され、液体還元剤用タンク70の劣化や破損を防止することができる。   Further, according to the example shown in FIG. 7, since the buffer material 92 is provided between the liquid reducing agent tank 70 and the bracket 96, the bracket 96 and the liquid reducing agent tank 70 do not directly interfere with each other. The rubbing of the liquid reducing agent tank 70 is suppressed, and deterioration or breakage of the liquid reducing agent tank 70 can be prevented.

以上、本発明の好ましい実施例について詳説したが、本発明は、上述した実施例に制限されることはなく、本発明の範囲を逸脱することなく、上述した実施例に種々の変形及び置換を加えることができる。   The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

例えば、図7に示す例では、好ましい実施例として、緩衝材92が設けられるが、緩衝材92の一部又は全てが省略されてもよい。例えば、液体還元剤用タンク70とブラケット96との間の緩衝材92が省略されてもよい。   For example, in the example shown in FIG. 7, the buffer material 92 is provided as a preferred embodiment, but a part or all of the buffer material 92 may be omitted. For example, the buffer material 92 between the liquid reducing agent tank 70 and the bracket 96 may be omitted.

1 下部走行体
2 上部旋回体
3 キャブ
4 ブーム
5 アーム
6 バケット
7 エンジンルーム
8 ディーゼルエンジン
9 排気管
10 排ガス処理装置
12 冷却ファン
13 熱交換機ユニット
14 旋回フレーム
17L,17R ブーム支持ブラケット
172L,172R 穴
18 燃料タンク
19 サンプタンク
70 液体還元剤用タンク
70a 鉛直側面部
70b 傾斜面
70c 凹部
72 箱部材
74 補強リブ
80 ボルト
90 拘束部材
92 緩衝材
96 ブラケット
97 ボルト
721 バンド留め部
722 補強部材
724 側壁
DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving body 3 Cab 4 Boom 5 Arm 6 Bucket 7 Engine room 8 Diesel engine 9 Exhaust pipe 10 Exhaust gas treatment device 12 Cooling fan 13 Heat exchanger unit 14 Turning frame 17L, 17R Boom support bracket 172L, 172R Hole 18 Fuel tank 19 Sump tank 70 Liquid reductant tank 70a Vertical side surface portion 70b Inclined surface 70c Recess 72 Box member 74 Reinforcement rib 80 Bolt 90 Restraining member 92 Buffer material 96 Bracket 97 Bolt 721 Band fastening portion 722 Reinforcement member 724 Side wall

Claims (4)

上部旋回体を有する建設機械の上部旋回体の右前方かつ、ブーム支持ブラケットの外側に配置され、液体還元剤が貯留され、樹脂により形成される液体還元剤用タンクと、
前記液体還元剤用タンクが内部に収容され、建設機械のフレームに固定される箱部材と、
前記箱部材の上部に設けられ、前記液体還元剤用タンクの上面の一部に作用して前記液体還元剤用タンクの上方への移動を抑制する拘束部材とを備え
前記液体還元剤用タンクの前側の側面の上部は、傾斜面を備え、前記傾斜面を備える前記液体還元剤用タンクの前側の側面は、ブーム支持ブラケットのブームフートピン用穴よりも後方に位置し、
前記拘束部材は、前記液体還元剤用タンクの前記傾斜面に沿った傾斜面を備えることを特徴とする、建設機械。
A liquid reductant tank, which is disposed on the right front side of the upper revolving unit of the construction machine having the upper revolving unit and outside the boom support bracket, stores the liquid reducing agent, and is formed of a resin;
A box member accommodated inside the liquid reducing agent tank and fixed to a frame of a construction machine;
A restraining member provided on an upper portion of the box member and acting on a part of the upper surface of the liquid reducing agent tank to suppress the upward movement of the liquid reducing agent tank ;
The upper part of the front side surface of the liquid reductant tank has an inclined surface, and the front side surface of the liquid reductant tank with the inclined surface is positioned behind the boom foot pin hole of the boom support bracket. And
The construction machine, wherein the restraining member includes an inclined surface along the inclined surface of the liquid reducing agent tank .
前記液体還元剤用タンクは、底面から鉛直方向に延在する平面状の側面部を備え、
前記箱部材は、前記液体還元剤用タンクの側面部の略全体をカバーする、請求項1に記載の建設機械。
The liquid reducing agent tank includes a planar side surface portion extending in the vertical direction from the bottom surface,
The construction machine according to claim 1, wherein the box member covers substantially the entire side surface of the liquid reducing agent tank.
前記箱部材と前記液体還元剤用タンクとの間に、緩衝材が設けられる、請求項1又は2に記載の建設機械。   The construction machine according to claim 1 or 2, wherein a cushioning material is provided between the box member and the liquid reducing agent tank. 前記拘束部材は、給水口周辺を覆わずに前記移動を拘束する、請求項1〜3のうちのいずれか1項に記載の建設機械。   The construction machine according to any one of claims 1 to 3, wherein the restraining member restrains the movement without covering a periphery of the water supply port.
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