JP2016117338A - Fitting structure of reducing agent tank - Google Patents

Fitting structure of reducing agent tank Download PDF

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JP2016117338A
JP2016117338A JP2014256762A JP2014256762A JP2016117338A JP 2016117338 A JP2016117338 A JP 2016117338A JP 2014256762 A JP2014256762 A JP 2014256762A JP 2014256762 A JP2014256762 A JP 2014256762A JP 2016117338 A JP2016117338 A JP 2016117338A
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tank
width direction
vehicle width
reducing agent
bracket
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JP6525244B2 (en
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和宏 小平
Kazuhiro Kodaira
和宏 小平
尚子 江崎
Naoko Ezaki
尚子 江崎
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Isuzu Motors Ltd
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Isuzu Motors Ltd
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Abstract

PROBLEM TO BE SOLVED: To form an exposure shape considering an influence on a pedestrian or the like without applying special processing to a bracket.SOLUTION: A front face part 16 of a reducing agent tank 11 stands vertically on the outside in a vehicle width direction, and extends in a longitudinal direction in a tank fitted state. A tank curved face corner part 50 is bent in a curved shape from a front end edge and a rear end edge of the front face part 16 to the inside in the vehicle width direction. A step part 51 is bent from an inner end edge of the tank curved face corner part 50 in the vehicle width direction to the tank inner side. A side face part 19 extends inward in the vehicle width direction from an end edge of the tank inner side of the step part 51. A side plate part 26 of the bracket 13 is disposed on the tank inner side than the tank curved face corner part 50, and faces the side face part 19 from the tank outer side. A tip edge part 26a at the vehicle width direction outer side of the side plate part 26 extends vertically near the vehicle width direction inner side of the step part 51. An outer face 51a of the step part 51 is curved from an outer face 50a of the tank curved face corner part 50 at a predetermined curvature radius or more.SELECTED DRAWING: Figure 3

Description

本発明は、車体フレームに対する還元剤タンクの取付構造に関する。   The present invention relates to a structure for attaching a reducing agent tank to a vehicle body frame.

特許文献１には、還元剤タンクを車両フレームに固定するためのブラケットが記載されている。ブラケットは、鋼鈑を屈曲して形成され還元剤タンクを収容する収容部と、収容部に一体に設けられ車両フレームに取り付けられる取付部とからなり、収容部は、還元剤タンクを載置するための底板部と、還元剤タンクの背面を支持するための背板部と、還元剤タンクの左右の側面を支持するための側板部とを備える。側板部は、底板部の左右の両辺から上方に延びて形成されている。   Patent Document 1 describes a bracket for fixing a reducing agent tank to a vehicle frame. The bracket is composed of a housing part that is formed by bending a steel plate and houses the reducing agent tank, and an attachment part that is integrally provided in the housing part and attached to the vehicle frame, and the housing part mounts the reducing agent tank. A bottom plate portion for supporting the back surface of the reducing agent tank, and side plate portions for supporting the left and right side surfaces of the reducing agent tank. The side plate portion is formed to extend upward from both the left and right sides of the bottom plate portion.

特開２０１１−１３１７３０号公報JP 2011-131730 A

特許文献１のブラケットの側板部が車幅方向外側に露出する場合、歩行者等との干渉時において歩行者等に与える影響を考慮すると、側壁部の車幅方向外側の先端縁部が所定の曲率半径以上で湾曲することが好ましい。   In the case where the side plate portion of the bracket of Patent Document 1 is exposed to the outside in the vehicle width direction, considering the influence on the pedestrian and the like at the time of interference with the pedestrian and the like, the tip edge portion on the outside in the vehicle width direction of the side wall portion is predetermined. It is preferable to bend at a radius of curvature or more.

しかし、側板部は板状体であるため、板厚よりも長い曲率半径の湾曲形状を側板部の先端縁部に簡易に形成することができず、歩行者等への影響を考慮した露出形状とするためには、ブラケットに特別な加工（例えば、所定の曲率半径以上の円形状の棒体を、先端縁部よりも外側へ突出させた状態で側板部に固定する等）を施さなければならない。   However, since the side plate portion is a plate-like body, a curved shape with a radius of curvature longer than the plate thickness cannot be easily formed on the leading edge of the side plate portion, and an exposed shape that takes into account the effects on pedestrians etc. In order to achieve this, the bracket must be specially processed (for example, a circular rod having a predetermined radius of curvature or more is fixed to the side plate in a state of protruding outward from the tip edge). Don't be.

そこで、本発明は、ブラケットに特別な加工を施すことなく、歩行者等に与える影響を考慮した露出形状とすることが可能な還元剤タンクの取付構造の提供を目的とする。   Therefore, an object of the present invention is to provide a reducing agent tank mounting structure that can have an exposed shape in consideration of the influence on a pedestrian or the like without performing special processing on the bracket.

上記目的を達成すべく、本発明は、車体フレームに対して固定したブラケットに還元剤タンクを取付ける取付構造であって、ブラケットは、上下方向に起立して車幅方向外側へ延びるブラケット側板部を有し、還元剤タンクは、タンク外面部とタンク曲面角部と段差部とタンク側面部とを有する。   In order to achieve the above object, the present invention provides a mounting structure in which a reducing agent tank is attached to a bracket fixed to a vehicle body frame, and the bracket has a bracket side plate portion that erects in the vertical direction and extends outward in the vehicle width direction. The reducing agent tank includes a tank outer surface portion, a tank curved surface corner portion, a step portion, and a tank side surface portion.

ブラケットに還元剤タンクを取付けたタンク取付状態で、タンク外面部は、車幅方向外側で上下方向に起立して前後方向に延び、タンク曲面角部は、タンク外面部の前方又は後方の端縁から車幅方向内側へ湾曲状に曲折し、段差部は、タンク曲面角部の車幅方向の内端縁からタンク内側へ曲折し、タンク側面部は、段差部のタンク内側の端縁から車幅方向内側へ延びる。上記タンク取付状態で、ブラケット側板部は、タンク曲面角部よりもタンク内側に配置されてタンク側面部にタンク外側から対向し、ブラケット側板部の車幅方向外側の先端縁部は、段差部の車幅方向内側近傍で上下方向に延びる。段差部の外面は、タンク曲面角部の外面から所定の曲率半径以上で湾曲する。   In the tank mounting state where the reducing agent tank is mounted on the bracket, the tank outer surface part stands up and down in the vertical direction outside the vehicle width direction and extends in the front-rear direction, and the tank curved corner is the front or rear edge of the tank outer surface part From the inner edge of the tank curved corner to the inside of the tank, and the side surface of the tank from the edge inside the tank of the step. Extends inward in the width direction. In the above-described tank mounting state, the bracket side plate portion is disposed on the inner side of the tank with respect to the tank curved surface corner portion and faces the tank side surface portion from the outside of the tank, and the front edge of the bracket side plate portion on the outer side in the vehicle width direction is the stepped portion. It extends in the vertical direction near the inside in the vehicle width direction. The outer surface of the stepped portion is curved with a predetermined radius of curvature or more from the outer surface of the tank curved corner.

上記構成において、所定の曲率半径は、例えばブラケット側板部の板厚を超える長さであり、段差部の外面は、ブラケット側板部の板厚よりも長い曲率半径でタンク曲面角部の外面から湾曲する。   In the above configuration, the predetermined radius of curvature is, for example, a length exceeding the thickness of the bracket side plate, and the outer surface of the stepped portion is curved from the outer surface of the corner of the tank curved surface with a radius of curvature longer than the thickness of the bracket side plate. To do.

上記構成では、ブラケット側板部の車幅方向外側の先端縁部は、湾曲状のタンク曲面角部の車幅方向内側に隠れた状態で配置され、段差部の外面は、タンク曲面角部の外面から所定の曲率半径以上で湾曲するので、ブラケットに特別な加工を施すことなく、歩行者等に与える影響を考慮した露出形状とすることができる。   In the above configuration, the front edge of the bracket side plate portion on the outer side in the vehicle width direction is arranged in a state hidden behind the curved tank curved corner portion in the vehicle width direction, and the outer surface of the stepped portion is the outer surface of the tank curved corner portion. Therefore, it is possible to obtain an exposed shape that takes into consideration the influence on pedestrians and the like without performing special processing on the bracket.

本発明によれば、ブラケットに特別な加工を施すことなく、歩行者等に与える影響を考慮した露出形状とすることができる。   According to the present invention, it is possible to obtain an exposed shape in consideration of the influence on a pedestrian or the like without performing special processing on the bracket.

本発明の一実施形態に係る還元剤タンクの取付構造の斜視図である。It is a perspective view of the attachment structure of the reducing agent tank concerning one embodiment of the present invention. 図１の還元剤タンク及びブラケットの要部断面図である。It is principal part sectional drawing of the reducing agent tank of FIG. 1, and a bracket. 図２の要部拡大図である。FIG. 3 is an enlarged view of a main part of FIG. 2. 還元剤タンクが用いられるＳＣＲシステムの概略図である。1 is a schematic view of an SCR system in which a reducing agent tank is used.

以下、本発明の一実施形態に係る還元剤タンクの取付構造について、図面を参照して説明する。なお、以下の説明において、前後方向とは車両の進行方向の前後方向であり、左右方向とは車両前方を向いた状態での左右方向である。また、図中矢印ＦＲは車両前方を、矢印ＩＮは車幅方向内側を、矢印ＵＰは車両上方をそれぞれ示す。   Hereinafter, a reducing agent tank mounting structure according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the front-rear direction is the front-rear direction of the traveling direction of the vehicle, and the left-right direction is the left-right direction when facing the front of the vehicle. In the figure, the arrow FR indicates the front of the vehicle, the arrow IN indicates the inner side in the vehicle width direction, and the arrow UP indicates the upper side of the vehicle.

図４に示すように、還元剤タンク（尿素水タンク）１１は、尿素（尿素水）を還元剤としてエンジンの排気ガス中のＮＯｘ（窒素酸化物）を浄化するＳＣＲシステム１において、尿素水を貯留するために用いられる。車両のエンジン（例えば、ディーゼルエンジン）２に接続された排気管３には、排気上流側から順に、還元剤たる尿素水を排気管３内に噴射する還元剤噴射ノズル４と、排気管３内に噴射された尿素水から生成されるアンモニアで排気ガス中のＮＯｘ（窒素酸化物）を還元浄化するＳＣＲ触媒（選択還元触媒）５とが配設される。還元剤タンク１１に貯留された尿素水は、還元剤供給配管６を介して還元剤供給ポンプ７に供給される。また、還元剤供給ポンプ７に供給された尿素水の一部は、還元剤戻り配管９を介して還元剤タンク１１に戻される。還元剤供給ポンプ７は、ＥＣＵ（エンジン制御ユニット又は電子制御ユニット）８により制御され、排気温度センサ（図示省略）によって検出されるＳＣＲ触媒５の入口の排気温度がＳＣＲ触媒５の活性温度に達したとき、排気ガス中のＮＯｘの量に見合った量の尿素水を還元剤噴射ノズル４に供給する。   As shown in FIG. 4, the reducing agent tank (urea water tank) 11 uses urea (urea water) as a reducing agent to purify urea water in the SCR system 1 that purifies NOx (nitrogen oxides) in engine exhaust gas. Used for storage. An exhaust pipe 3 connected to a vehicle engine (for example, a diesel engine) 2 includes a reducing agent injection nozzle 4 that injects urea water as a reducing agent into the exhaust pipe 3 in order from the exhaust upstream side, and an exhaust pipe 3 interior. And an SCR catalyst (selective reduction catalyst) 5 for reducing and purifying NOx (nitrogen oxide) in the exhaust gas with ammonia generated from the urea water injected into the exhaust gas. The urea water stored in the reducing agent tank 11 is supplied to the reducing agent supply pump 7 through the reducing agent supply pipe 6. A part of the urea water supplied to the reducing agent supply pump 7 is returned to the reducing agent tank 11 via the reducing agent return pipe 9. The reducing agent supply pump 7 is controlled by an ECU (engine control unit or electronic control unit) 8, and the exhaust temperature at the inlet of the SCR catalyst 5 detected by an exhaust temperature sensor (not shown) reaches the activation temperature of the SCR catalyst 5. When this occurs, an amount of urea water commensurate with the amount of NOx in the exhaust gas is supplied to the reducing agent injection nozzle 4.

図１に示すように、還元剤タンク１１は車体フレーム１２の車幅方向外側の側面にブラケット１３とバンド１４を介して脱着可能に固定される。車体フレーム１２は、例えば、ラダーフレームのサイドメンバであり、図１の左側が車幅方向外側となる。   As shown in FIG. 1, the reducing agent tank 11 is detachably fixed to a side surface of the vehicle body frame 12 on the outer side in the vehicle width direction through a bracket 13 and a band 14. The body frame 12 is a side member of a ladder frame, for example, and the left side in FIG.

還元剤タンク１１は、成形自由度の高い樹脂製タンクからなり、外形を略直方体に形成されている。還元剤タンク１１は、車両外側に向けられる前面部（タンク外面部）１６と、還元剤供給配管６及び還元剤戻り配管９等の配管が接続される配管接続部１７が設けられた上面部１８と、前後の側面部（タンク側面部）１９と、背面部３７と、底面部３８とを有する。また、還元剤タンク１１の車幅方向外側には、還元剤補給口１５が形成され、還元剤補給口１５から容易に尿素水を補給できるようになっている。還元剤タンク１１の前側の上面部１８には、前後方向に延びる溝状の上部ビード２０が形成され、還元剤タンク１１の前後の両側面部１９には、上部ビード２０から斜め後方に延びる溝状の側部ビード２１が形成されている。   The reducing agent tank 11 is made of a resin tank having a high degree of molding freedom, and has an outer shape formed in a substantially rectangular parallelepiped shape. The reducing agent tank 11 has an upper surface portion 18 provided with a front surface portion (tank outer surface portion) 16 directed to the outside of the vehicle and a pipe connecting portion 17 to which piping such as the reducing agent supply piping 6 and the reducing agent return piping 9 is connected. And front and rear side surface portions (tank side surface portions) 19, a back surface portion 37, and a bottom surface portion 38. A reducing agent supply port 15 is formed outside the reducing agent tank 11 in the vehicle width direction so that urea water can be easily supplied from the reducing agent supply port 15. A groove-like upper bead 20 extending in the front-rear direction is formed on the upper surface 18 on the front side of the reducing agent tank 11, and a groove-like shape extending obliquely rearward from the upper bead 20 on the front and rear side surfaces 19 of the reducing agent tank 11. Side bead 21 is formed.

ブラケット１３は、鋼鈑を屈曲して形成され還元剤タンク１１を収容する収容部２２と、収容部２２に一体に設けられ車体フレーム１２に取付けられる取付部２３とからなる。   The bracket 13 includes a housing portion 22 that is formed by bending a steel plate and houses the reducing agent tank 11, and a mounting portion 23 that is integrally provided in the housing portion 22 and attached to the vehicle body frame 12.

収容部２２は、還元剤タンク１１を載置するための底板部２４と、還元剤タンク１１の背面部３７を支持するための背板部２５と、還元剤タンク１１の前後の側面部１９を支持するための前後の側板部（ブラケット側板部）２６とを備える。底板部２４は平面視略矩形板状に形成されており、軽量化のための孔（図示省略）を複数有する。側板部２６は、底板部２４の前後の両辺から上方に延びて形成されている。前後の側板部２６は、底板部２４の前縁及び後縁から上方に延びて起立し、背板部２５から車幅方向外側へ延びる。側板部２６の上縁２８は、還元剤タンク１１の車幅方向外側を広い面積で露出させるように、車幅方向外側に向かって下方へ傾斜する。収容部２２内に還元剤タンク１１を収容したとき側部ビード２１の下端部に臨む側板部２６には、バンド１４を係止するための係止穴２９が形成されている。係止穴２９は側板部２６を貫通して形成されており、後述するバンド１４のフック部３０を掛けられるようになっている。また、係止穴２９は、三角形に形成されると共にバンド１４の延長方向に角部４６を向けるように形成されており、フック部３０を角部４６で位置決めするようになっている。背板部２５は、それぞれの側板部２６の後端の辺から収容部２２の内側へ延びて形成されている。また、側板部２６には、底板部２４と同様に軽量化のための孔２７が複数形成されている。   The accommodating portion 22 includes a bottom plate portion 24 for mounting the reducing agent tank 11, a back plate portion 25 for supporting the back surface portion 37 of the reducing agent tank 11, and side portions 19 before and after the reducing agent tank 11. Front and rear side plate portions (bracket side plate portions) 26 for support are provided. The bottom plate portion 24 is formed in a substantially rectangular plate shape in plan view and has a plurality of holes (not shown) for weight reduction. The side plate portion 26 is formed to extend upward from both the front and rear sides of the bottom plate portion 24. The front and rear side plate portions 26 extend upward from the front edge and the rear edge of the bottom plate portion 24 and stand up, and extend outward from the back plate portion 25 in the vehicle width direction. The upper edge 28 of the side plate portion 26 is inclined downward toward the outer side in the vehicle width direction so as to expose the outer side in the vehicle width direction of the reducing agent tank 11 with a large area. A locking hole 29 for locking the band 14 is formed in the side plate portion 26 facing the lower end portion of the side bead 21 when the reducing agent tank 11 is stored in the storage portion 22. The locking hole 29 is formed through the side plate portion 26 so that a hook portion 30 of the band 14 to be described later can be hooked. Further, the locking hole 29 is formed in a triangular shape and is formed so that the corner portion 46 faces in the extending direction of the band 14, and the hook portion 30 is positioned by the corner portion 46. The back plate portion 25 is formed to extend from the rear end side of each side plate portion 26 to the inside of the accommodating portion 22. Further, the side plate portion 26 is formed with a plurality of holes 27 for weight reduction, similar to the bottom plate portion 24.

取付部２３は、一対の断面Ｌ字状の鋼材からなり、側板部２６と背板部２５との角部３１に沿って設けられる。また、取付部２３と背板部２５には、取付ボルト（図示省略）を挿通するためのボルト孔（図示省略）が上下に間隔を隔てて複数形成され、ブラケット１３は取付ボルトを介して車体フレーム１２に取付けられる。   The attachment portion 23 is made of a steel material having a pair of L-shaped cross sections, and is provided along the corner portion 31 between the side plate portion 26 and the back plate portion 25. The mounting portion 23 and the back plate portion 25 are formed with a plurality of bolt holes (not shown) for inserting mounting bolts (not shown) at intervals in the vertical direction, and the bracket 13 is attached to the vehicle body via the mounting bolts. Attached to the frame 12.

バンド１４は、前後方向に延びる板状に形成されて上部ビード２０内に収容されるバンド本体３３と、バンド本体３３に設けられバンド本体３３と還元剤タンク１１の間に介在されるラバー部３４と、側部ビード２１内に収容され側板部２６の係止穴２９に係止されると共にバンド本体３３の端部に締結されるＪボルト３５とからなる。   The band 14 is formed in a plate shape extending in the front-rear direction and is accommodated in the upper bead 20, and a rubber portion 34 provided on the band body 33 and interposed between the band body 33 and the reducing agent tank 11. And a J bolt 35 received in the side bead 21 and locked in the locking hole 29 of the side plate portion 26 and fastened to the end of the band main body 33.

バンド本体３３は、前後方向に延びる金属板をプレス成形してなる。バンド本体３３は、前後方向の中央部を上方に湾曲させるように屈曲されており、還元剤タンク１１の上部ビード２０の形状に沿うようになっている。また、バンド本体３３は、左右の両辺から上方に延びるリブ３７を有し、十分な強度に形成されている。バンド本体３３の前後の端部には、Ｊボルト３５を挿通するための挿通孔（図示省略）が形成されている。   The band body 33 is formed by press-molding a metal plate extending in the front-rear direction. The band main body 33 is bent so as to bend the center portion in the front-rear direction upward, and conforms to the shape of the upper bead 20 of the reducing agent tank 11. The band body 33 has ribs 37 extending upward from both the left and right sides, and is formed with sufficient strength. An insertion hole (not shown) for inserting the J bolt 35 is formed at the front and rear ends of the band body 33.

ラバー部３４は、上部ビード２０とバンド本体３３との間に介在して、バンド本体３３が還元剤タンク１１に直接触れて傷つけるのを防ぐ。   The rubber part 34 is interposed between the upper bead 20 and the band main body 33 to prevent the band main body 33 from directly touching and damaging the reducing agent tank 11.

Ｊボルト３５は、一端に形成され側板部２６の係止穴２９に係止されるフック部３０と、他端部に形成されバンド本体３３の端部に締結される雄ねじ部４１と、雄ねじ部４１に隣接する中間部に形成されバンド本体３３の挿通孔への挿入深さを規制するための鍔部（図示省略）とを備える。雄ねじ部４１はバンド本体３３の挿通孔に挿通される。雄ねじ部４１にはナット４５が螺合され、ナット４５を締め付けることでバンド１４に張力が付与される。   The J bolt 35 includes a hook portion 30 formed at one end and locked in the locking hole 29 of the side plate portion 26, a male screw portion 41 formed at the other end portion and fastened to the end portion of the band body 33, and a male screw portion. 41 and a flange portion (not shown) that is formed in an intermediate portion adjacent to 41 and that regulates the insertion depth of the band main body 33 into the insertion hole. The male screw portion 41 is inserted through the insertion hole of the band main body 33. A nut 45 is screwed into the male screw portion 41, and the tension is applied to the band 14 by tightening the nut 45.

還元剤タンク１１をブラケット１３に取付ける場合、ブラケット１３上に還元剤タンク１１を載置し、バンド本体３３を上部ビード２０内に納めると共にＪボルト３５を側部ビード２１内に納め、ブラケット１３の係止穴２９にフック部３０を掛け、ナット４５を締める。還元剤タンク１１はブラケット１３の底板部２４と背板部２５に押しつけられ、強固に、かつ簡単にブラケット１３に固定される。   When the reducing agent tank 11 is attached to the bracket 13, the reducing agent tank 11 is placed on the bracket 13, the band body 33 is placed in the upper bead 20, and the J bolt 35 is placed in the side bead 21. The hook portion 30 is hung on the locking hole 29 and the nut 45 is tightened. The reducing agent tank 11 is pressed against the bottom plate portion 24 and the back plate portion 25 of the bracket 13 and is firmly and easily fixed to the bracket 13.

ブラケット１３に還元剤タンク１１を取付けたタンク取付状態で、還元剤タンク１１の前面部１６は、車幅方向外側で上下方向に起立して前後方向に延びる。また、図２に示すように、前面部１６と前後の側面部１９との間には、タンク曲面角部５０と段差部５１とがそれぞれ設けられる。上記タンク取付状態で、タンク曲面角部５０は、前面部１６の前端縁及び後端縁から車幅方向内側へ湾曲状に曲折し、段差部５１は、タンク曲面角部５０の車幅方向の内端縁からタンク内側へ曲折し、側面部１９は、段差部５１のタンク内側の端縁から車幅方向内側へ曲折して延びる。ブラケット１３の側板部２６は、タンク曲面角部５０よりもタンク内側（前側の側板部２６は前側のタンク曲面角部５０よりも後方、後側の側板部２６は後側のタンク曲面角部５０よりも前方）に配置されて側面部１９にタンク外側から対向し、側板部２６の車幅方向外側の先端縁部２６ａは、段差部５１の車幅方向内側近傍で上下方向に延びる。   When the reducing agent tank 11 is attached to the bracket 13, the front portion 16 of the reducing agent tank 11 stands up and down in the vehicle width direction outside and extends in the front-rear direction. Further, as shown in FIG. 2, a tank curved surface corner portion 50 and a step portion 51 are provided between the front surface portion 16 and the front and rear side surface portions 19. In the tank mounting state, the tank curved corner portion 50 is bent inwardly in the vehicle width direction from the front edge and the rear edge of the front surface portion 16, and the step portion 51 is formed in the vehicle width direction of the tank curved corner portion 50. The side surface 19 is bent from the inner edge of the stepped portion 51 to the inside of the tank and extends inwardly in the vehicle width direction. The side plate portion 26 of the bracket 13 is located inside the tank with respect to the tank curved corner portion 50 (the front side plate portion 26 is behind the front tank curved corner portion 50 and the rear side plate portion 26 is the rear tank curved corner portion 50. The front edge 26a of the side plate portion 26 on the outer side in the vehicle width direction extends in the vertical direction near the inner side in the vehicle width direction of the step portion 51.

図３に示すように、段差部５１の外面５１ａは、タンク曲面角部５０の外面５０ａから所定の曲率半径以上で湾曲する。所定の曲率半径は、ブラケット１３の側板部２６の板厚を超える長さであり、段差部５１の外面５１ａは、例えば２．５ｍｍの曲率半径Ｒａで湾曲する。すなわち、段差部５１の外面５１ａは、側板部２６の板厚よりも長い曲率半径でタンク曲面角部５０の外面から湾曲する。なお、タンク曲面角部５０の外面５０ａの曲率半径は、段差部５１の外面５１ａの曲率半径Ｒａよりも顕著に長い。また、図３では後側のタンク曲面角部５０及び段差部５１を図示しているが、前側についても同様の構成である。   As shown in FIG. 3, the outer surface 51 a of the stepped portion 51 is curved with a predetermined radius of curvature or more from the outer surface 50 a of the tank curved surface corner portion 50. The predetermined curvature radius is a length exceeding the plate thickness of the side plate portion 26 of the bracket 13, and the outer surface 51a of the step portion 51 is curved with a curvature radius Ra of, for example, 2.5 mm. That is, the outer surface 51 a of the stepped portion 51 is curved from the outer surface of the tank curved surface corner portion 50 with a radius of curvature longer than the plate thickness of the side plate portion 26. Note that the radius of curvature of the outer surface 50 a of the tank curved surface corner 50 is significantly longer than the radius of curvature Ra of the outer surface 51 a of the stepped portion 51. Moreover, although the tank curved corner part 50 and the level | step-difference part 51 of the rear side are shown in FIG. 3, it is the same structure also about the front side.

本実施形態によれば、ブラケット１３の側板部２６の車幅方向外側の先端縁部２６ａは、湾曲状のタンク曲面角部５０の車幅方向内側に隠れた状態で配置され、段差部５１の外面５１ａは、タンク曲面角部５０の外面５０ａから所定の曲率半径以上で湾曲する。このため、図３に示すように、所定の半径（例えば５０ｍｍ）の円形断面を有する物体５３が還元剤タンク１１の側面部１９に車幅方向外側から接触した場合、物体５３は湾曲状の段差部５１の外面５１ａとブラケット１３の側板部２６の平面状の部分とに接触し、側板部２６の先端縁部２６ａと物体５３との接触は発生しない。従って、ブラケット１３に特別な加工を施すことなく、歩行者等に与える影響を考慮した露出形状とすることができる。   According to the present embodiment, the front edge 26a of the side plate portion 26 of the bracket 13 on the outer side in the vehicle width direction is arranged hidden behind the curved tank curved corner portion 50 in the vehicle width direction, The outer surface 51a is curved from the outer surface 50a of the tank curved surface corner 50 with a predetermined radius of curvature or more. Therefore, as shown in FIG. 3, when an object 53 having a circular cross section with a predetermined radius (for example, 50 mm) contacts the side surface portion 19 of the reducing agent tank 11 from the outside in the vehicle width direction, the object 53 has a curved step. The outer surface 51a of the portion 51 and the planar portion of the side plate portion 26 of the bracket 13 are in contact with each other, and the contact between the tip edge portion 26a of the side plate portion 26 and the object 53 does not occur. Therefore, it is possible to obtain an exposed shape in consideration of the influence on the pedestrian and the like without performing special processing on the bracket 13.

以上、本発明者によってなされた発明を適用した実施形態について説明したが、この実施形態による本発明の開示の一部をなす論述及び図面により本発明は限定されることはない。すなわち、この実施形態に基づいて当業者等によりなされる他の実施形態、実施例及び運用技術等は全て本発明の範疇に含まれることは勿論である。   As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

例えば、本実施形態では還元剤タンク１１の前後の双方に段差部５１を設けたが、前後の一方にのみ段差部５１を設けてもよい。   For example, in the present embodiment, the stepped portions 51 are provided on both the front and rear sides of the reducing agent tank 11, but the stepped portions 51 may be provided only on one of the front and rear sides.

本発明は、還元剤タンクを搭載する車両に広く適用することができる。   The present invention can be widely applied to vehicles equipped with a reducing agent tank.

１１ 還元剤タンク（尿素タンク）
１２ 車体フレーム
１３ ブラケット
１６ 前面部（タンク外面部）
１９ 側面部（タンク側面部）
２６ 側板部（ブラケット側板部）
２６ａ 側板部の先端縁部
５０ タンク曲面角部
５０ａ タンク曲面角部の外面
５１ 段差部
５１ａ 段差部の外面 11 Reducing agent tank (urea tank)
12 Body frame 13 Bracket 16 Front surface (tank outer surface)
19 Side (tank side)
26 Side plate (bracket side plate)
26a Front edge 50 of side plate portion Tank curved surface corner portion 50a Tank curved surface corner outer surface 51 Stepped portion 51a Stepped portion outer surface

Claims (1)

車体フレームに対して固定されるブラケットに還元剤タンクを取付ける取付構造であって、
前記ブラケットは、上下方向に起立して車幅方向外側へ延びるブラケット側板部を有し、
前記還元剤タンクは、タンク外面部とタンク曲面角部と段差部とタンク側面部とを有し、
前記ブラケットに前記還元剤タンクを取付けたタンク取付状態で、前記タンク外面部は、車幅方向外側で上下方向に起立して前後方向に延び、前記タンク曲面角部は、前記タンク外面部の前方又は後方の端縁から車幅方向内側へ湾曲状に曲折し、前記段差部は、前記タンク曲面角部の車幅方向の内端縁からタンク内側へ曲折し、前記タンク側面部は、前記段差部のタンク内側の端縁から車幅方向内側へ延び、
前記タンク取付状態で、前記ブラケット側板部は、前記タンク曲面角部よりもタンク内側に配置されて前記タンク側面部にタンク外側から対向し、前記ブラケット側板部の車幅方向外側の先端縁部は、前記段差部の車幅方向内側近傍で上下方向に延び、
前記段差部の外面は、前記タンク曲面角部の外面から所定の曲率半径以上で湾曲する
ことを特徴とする還元剤タンクの取付構造。 A mounting structure for attaching a reducing agent tank to a bracket fixed to a vehicle body frame,
The bracket has a bracket side plate portion that stands in the vertical direction and extends outward in the vehicle width direction,
The reducing agent tank has a tank outer surface portion, a tank curved surface corner portion, a step portion, and a tank side surface portion,
In the tank mounting state in which the reducing agent tank is mounted on the bracket, the tank outer surface portion stands up and down in the vertical direction on the outer side in the vehicle width direction and extends in the front-rear direction, and the tank curved corner portion is in front of the tank outer surface portion. Alternatively, the stepped portion bends inward in the vehicle width direction from the rear edge, the stepped portion bends inward from the inner end edge in the vehicle width direction of the tank curved corner portion, and the tank side surface portion has the stepped portion. Extending from the inner edge of the tank inside the vehicle in the vehicle width direction,
In the tank mounting state, the bracket side plate portion is arranged on the inner side of the tank with respect to the tank curved surface corner portion and faces the tank side surface portion from the outside of the tank, and the front edge of the bracket side plate portion on the outer side in the vehicle width direction is , Extending in the vertical direction near the inner side in the vehicle width direction of the stepped portion,
The reducing agent tank mounting structure, wherein an outer surface of the stepped portion is curved with a predetermined radius of curvature or more from an outer surface of the tank curved corner.
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN114151185A (en) * 2021-11-18 2022-03-08 东风商用车有限公司 Urea tank support assembly

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US20090188923A1 (en) * 2007-12-10 2009-07-30 Fuel Systems, Inc. Urea solution tank assembly
JP2011132889A (en) * 2009-12-24 2011-07-07 Isuzu Motors Ltd Atmosphere open structure of reducing agent tank
JP2013203329A (en) * 2012-03-29 2013-10-07 Hino Motors Ltd Fixing structure of tank for vehicle

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Publication number Priority date Publication date Assignee Title
US20090188923A1 (en) * 2007-12-10 2009-07-30 Fuel Systems, Inc. Urea solution tank assembly
JP2011132889A (en) * 2009-12-24 2011-07-07 Isuzu Motors Ltd Atmosphere open structure of reducing agent tank
JP2013203329A (en) * 2012-03-29 2013-10-07 Hino Motors Ltd Fixing structure of tank for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114151185A (en) * 2021-11-18 2022-03-08 东风商用车有限公司 Urea tank support assembly
CN114151185B (en) * 2021-11-18 2022-09-06 东风商用车有限公司 Urea tank support assembly

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