JP4280219B2 - Construction machine noise reduction structure - Google Patents

Construction machine noise reduction structure Download PDF

Info

Publication number
JP4280219B2
JP4280219B2 JP2004276245A JP2004276245A JP4280219B2 JP 4280219 B2 JP4280219 B2 JP 4280219B2 JP 2004276245 A JP2004276245 A JP 2004276245A JP 2004276245 A JP2004276245 A JP 2004276245A JP 4280219 B2 JP4280219 B2 JP 4280219B2
Authority
JP
Japan
Prior art keywords
wall surface
engine cover
intake hole
shielding member
construction machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2004276245A
Other languages
Japanese (ja)
Other versions
JP2006088857A (en
Inventor
裕也 田中
恭子 山田
盛夫 福田
康夫 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Japan Ltd
Original Assignee
Caterpillar Japan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Japan Ltd filed Critical Caterpillar Japan Ltd
Priority to JP2004276245A priority Critical patent/JP4280219B2/en
Priority to PCT/JP2005/016097 priority patent/WO2006033223A1/en
Publication of JP2006088857A publication Critical patent/JP2006088857A/en
Application granted granted Critical
Publication of JP4280219B2 publication Critical patent/JP4280219B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0891—Lids or bonnets or doors or details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/08—Air inlets for cooling; Shutters or blinds therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted fans

Description

この発明は、建設機械のエンジンやファン音などの作動音が外に漏れないように騒音対策を施すと共に、ラジエタに整流した冷却空気を流入することができるようにした建設機械の騒音低減構造に関する。   TECHNICAL FIELD The present invention relates to a noise reduction structure for a construction machine in which noise countermeasures are taken so that operating sounds such as engine and fan sounds of the construction machine do not leak to the outside and rectified cooling air can flow into a radiator. .

建設機械の一例として、例えば油圧ショベル４１では、図５に示すように、上部旋回体４１Ａの後方に内蔵されたラジエタ１１等の熱交換器１１、冷却ファン１２、エンジン１３、油圧ポンプ１４、マフラ１５等の機器が上部旋回体４１Ａのカバーの一部を構成するエンジンカバー４２で覆われている。
そして、上記エンジン等の冷却を行うために、前記エンジンカバー４２の一側方の上方に設けた上方吸気孔４３および側方上部に設けた側方吸気孔４４から流入した冷却空気（外気）は、冷却ファン１２によりラジエタ１１等の熱交換器を通過させて、前記エンジン１３及び前記油圧ポンプ１４の側方を通過させ、前記吸気孔の反対側に形成されたエンジンカバー４２の排気孔４５から外部に排出させている。 As an example of a construction machine, for example, in a hydraulic excavator 41, as shown in FIG. 5, a heat exchanger 11 such as a radiator 11 built in the rear of the upper swing body 41 </ b> A, a cooling fan 12, an engine 13, a hydraulic pump 14, a muffler 15 etc. are covered with the engine cover 42 which comprises a part of cover of upper revolving body 41A.
In order to cool the engine or the like, cooling air (outside air) flowing in from an upper intake hole 43 provided on one side of the engine cover 42 and a side intake hole 44 provided on the upper side is The cooling fan 12 passes through a heat exchanger such as the radiator 11 to pass the engine 13 and the side of the hydraulic pump 14 from an exhaust hole 45 of the engine cover 42 formed on the opposite side of the intake hole. It is discharged outside.

上記構成からなっているので、図６に示すように、前記上方吸気孔４３および側方吸気孔４４と、前記エンジン１３およびその補機との間には遮蔽物がないので、点線の矢印で示すこれらの動作音（エンジン音やファン音）が直接に前記吸気孔４３、４４から外部へ放出され、周囲騒音上昇の虞れがある。
また、前記上方吸気孔４３および側方吸気孔４４から流入された実線の矢印で示す冷却空気の流入は、ラジエタ１１前面のエリアＡでぶつかり混じって乱流が発生するので、冷却空気の吸入効率が低下する虞れがある。 As shown in FIG. 6, since there is no shielding between the upper intake hole 43 and the side intake hole 44 and the engine 13 and its accessories, as shown in FIG. These operating sounds (engine sound and fan sound) shown are directly emitted to the outside from the intake holes 43 and 44, which may increase ambient noise.
In addition, the cooling air inflow indicated by the solid arrows flowing in from the upper intake holes 43 and the side intake holes 44 collides with each other in the area A on the front surface of the radiator 11 and generates turbulent flow. May decrease.

そこで、特開２０００−１６０９４では、側方に吸気孔を設けず、エンジンカバーの上面及び下面に冷却空気をエンジンカバー内に流入する上・下吸気孔をそれぞれ設け、上・下吸気孔から流入された冷却空気を熱交換器の前面へそれぞれ導くための上・下導風ダクトを設ける構成を開示している。
しかし、上記構成では、側方に吸気孔を設けていないので、冷却ファンによる空位流の吸入効率が落ちる。
そこで、上・下吸気孔と連通する上・下導風ダクトを設ける必要があり、且つこれらから流入された冷却空気が混じり合わないように各上・下導風ダクトに整流機能を持たせる必要があり、構造が複雑化する虞れがある。
また、下吸気孔は、足回り装置の履帯の上方で開口しているので、履帯上部に運ばれた土砂や塵芥を吸引してしまう虞れがある。
特開２０００−１６０９４ 図２参照 Therefore, in Japanese Patent Laid-Open No. 2000-16094, no intake holes are provided on the sides, and upper and lower intake holes for allowing cooling air to flow into the engine cover are provided on the upper and lower surfaces of the engine cover, respectively. Disclosed is a configuration in which upper and lower air guide ducts for guiding the cooled air to the front surface of the heat exchanger are provided.
However, in the above configuration, since the intake holes are not provided on the sides, the suction efficiency of the vacant flow by the cooling fan is lowered.
Therefore, it is necessary to provide upper and lower air ducts that communicate with the upper and lower air intake holes, and each upper and lower air ducts must have a rectifying function so that the cooling air flowing in from them does not mix. There is a possibility that the structure becomes complicated.
Moreover, since the lower intake hole is opened above the crawler belt of the undercarriage device, there is a possibility that the earth and sand and dust carried to the upper portion of the crawler belt may be sucked.
Refer to FIG.

この発明が解決しようとする課題は、冷却ファンによる吸引効率を落とさずに整流しながらラジエタに流入することができると共に、エンジンやファン音などの動作音が外部へ漏れないように遮音することができる建設機械の騒音低減構造を提供することにある。   The problem to be solved by the present invention is that it can flow into the radiator while rectifying without lowering the suction efficiency by the cooling fan, and that the operation sound such as the engine and fan sound is prevented from leaking outside. An object of the present invention is to provide a construction machine noise reduction structure.

この発明は、上記課題を解決するために、請求項１の発明では、
建設機械の上部旋回体に設けたエンジンカバーの内部で、エンジンカバーの上壁面に形成された上方吸気孔と、側壁面に形成された側方吸気孔との間を仕切り、前記上方吸気孔および側方吸気孔からエンジンカバーに内蔵されたラジエタ等の機器が直視できないように傾斜させた遮蔽部材を前記開口とラジエタとの間に取り付けてなる建設機械の騒音低減構造において、
エンジンカバーの一部を構成する左サイドドア側に、側壁面の上部を内側へ漸次傾けて上壁面に連なる上方斜面部を設け、前記上壁面で上方斜面部に近接した個所に上方吸気孔を配置し、前記上方斜面部に側方吸気孔を配置してなり、
遮蔽部材が、上方吸気孔の左サイドドア側の外端から垂下する第１垂直線とラジエタ側の内端から垂下する第２垂直線の間の機体左右方向となる横幅領域と、側方吸気孔の上端から水平に延びる第１水平線と下端から延びる第２水平線の間の機体上下方向となる縦幅領域とを同時に横切るように配置されていることを特徴とする。
請求項２の発明では、
前記遮蔽部材が、水平面に対して４５度以上の角度に傾斜して配置されてなることを特徴とする。
請求項３の発明では、
前記遮蔽部材が、プレート状の傾斜面本体と、該傾斜面本体をエンジンカバーの内壁面に固定するための固定片部とからなっており、
エンジンカバーの一部を構成する左サイドドアの上部には、エンジンカバーの上壁面の一部を構成する機体上方カバーが連設されており、該機体上方カバーの内壁面に前記遮蔽部材を固定してなることを特徴とする。 In order to solve the above-mentioned problems, the present invention provides
Inside the engine cover provided in the upper swing body of the construction machine, a partition is formed between an upper intake hole formed in the upper wall surface of the engine cover and a side intake hole formed in the side wall surface, and the upper intake hole and Oite shielding member devices such as a radiator built from the side air intake hole in the engine cover is inclined so as not to direct the noise reduction structure for a construction machine comprising attached between the opening and the radiator,
On the left side door side that forms a part of the engine cover, an upper sloped portion that is connected to the upper wall surface is provided by gradually inclining the upper part of the side wall surface inward, and an upper intake hole is provided at a location near the upper sloped portion on the upper wall surface. Arranged, and a side intake hole is arranged on the upper slope part,
A horizontal width region between the first vertical line hanging from the outer end on the left side door side of the upper intake hole and the second vertical line hanging from the inner end on the radiator side, and the side intake air The first horizontal line extending horizontally from the upper end of the hole and the second horizontal line extending from the lower end are disposed so as to simultaneously traverse the vertical width region in the vertical direction of the machine body .
In the invention of claim 2,
The shielding member is arranged to be inclined at an angle of 45 degrees or more with respect to a horizontal plane.
In the invention of claim 3,
The shielding member is composed of a plate-shaped inclined surface main body and a fixing piece for fixing the inclined surface main body to the inner wall surface of the engine cover,
A fuselage upper cover that forms part of the upper wall surface of the engine cover is connected to the upper part of the left side door that forms part of the engine cover, and the shielding member is fixed to the inner wall surface of the fuselage upper cover. It is characterized by becoming.

この発明では、上方吸気部と側方吸気部とを設けることで、冷却空気（外気）の流入を効率的に行うことができる。
また、エンジンカバーに内蔵された機器類（ラジエタ等の熱交換器、冷却ファン、エンジン、油圧ポンプ、マフラ等）の動作音は、直接に上方吸気部や側方吸気部を通って外へ抜けることなく、遮蔽部材にぶつかるので、機体外部への騒音の発生を低減させることができる。
また、冷却ファンによる吸引で、上方吸気部と側方吸気部とからそれぞれ吸入空気が流入されると、遮蔽部材によって、上方吸気部からの吸入空気と、側方吸気部からの吸入空気の流れが衝突することなく分離・整流されて導入されるので、ラジエタ前面で乱流が発生することがなく、機器類の冷却効果の向上を図−ることができる。 In the present invention, by providing the upper intake portion and the side intake portion, the cooling air (outside air) can be efficiently introduced.
In addition, the operating noise of equipment (heat exchangers such as radiators, cooling fans, engines, hydraulic pumps, mufflers, etc.) built in the engine cover directly escapes through the upper air intake and side air intakes. Without hitting the shielding member, it is possible to reduce the generation of noise to the outside of the aircraft.
Further, when the intake air flows in from the upper intake portion and the side intake portion by suction by the cooling fan, the flow of the intake air from the upper intake portion and the intake air from the side intake portion is caused by the shielding member. Are separated and rectified and introduced without colliding, so that turbulent flow does not occur in front of the radiator, and the cooling effect of the devices can be improved.

この発明では、エンジンカバーの内部で上方吸気孔と側方吸気孔の間を仕切る遮蔽板を設けることで、外部に漏れる騒音を低減すると共に、吸入された冷却空気を整流するという目的を実現した。   In the present invention, by providing a shielding plate that partitions the upper intake hole and the side intake hole inside the engine cover, the object of reducing noise leaking to the outside and rectifying the intake cooling air has been realized. .

以下に、この発明の建設機械の騒音低減構造を油圧ショベルに適用した実施例について図面を参照しながら説明する。
図１に示すように、油圧ショベル１は上部旋回体１Ａと、クローラ式足回り装置１Ｂとからなっており、上部旋回体１Ａの機体後方はエンジンルームとなっており、その外側を覆うエンジンカバー２は、ラジエタ１１等の熱交換器、冷却ファン１２、エンジン１３、油圧ポンプ１４、マフラ１５等の機器を覆っている。 Hereinafter, an embodiment in which a noise reduction structure for a construction machine according to the present invention is applied to a hydraulic excavator will be described with reference to the drawings.
As shown in FIG. 1, the excavator 1 includes an upper swing body 1A and a crawler type suspension device 1B. The upper rear body of the upper swing body 1A is an engine room, and an engine cover that covers the outside of the engine room. 2 covers devices such as a heat exchanger such as the radiator 11, a cooling fan 12, an engine 13, a hydraulic pump 14, and a muffler 15.

また、前記エンジンカバー２の一側方の上方に設けた上方吸気孔３および側方上部に設けた側方吸気孔４から流入した冷却空気は、冷却ファン１２によりラジエタ１１等の熱交換器を通過させて、前記エンジン１３及び前記油圧ポンプ１４の側方を通過させ、前記吸気孔３、４の反対側に形成されたエンジンカバー２の排気孔５から外部に排出させている。   Further, the cooling air flowing in from the upper intake hole 3 provided above one side of the engine cover 2 and the side intake hole 4 provided in the upper side of the engine cover 2 is used as a heat exchanger such as the radiator 11 by the cooling fan 12. Passing through the side of the engine 13 and the hydraulic pump 14, it is discharged to the outside through the exhaust hole 5 of the engine cover 2 formed on the opposite side of the intake holes 3 and 4.

このような、エンジンカバー２の内部に、エンジンカバー２の上壁面に形成された上方吸気孔３と、側壁面に形成された側方吸気孔４との間を仕切り、前記上方吸気孔３および側方吸気孔４からエンジンカバー２に内蔵されたラジエタ１１等の機器が直視できないように傾斜させた遮蔽部材６を前記上方吸気孔３および側方吸気孔４とラジエタ１１との間に取り付けている。   In such an engine cover 2, the upper intake hole 3 formed in the upper wall surface of the engine cover 2 and the side intake hole 4 formed in the side wall surface are partitioned, and the upper intake hole 3 and A shielding member 6 inclined so that a device such as the radiator 11 built in the engine cover 2 cannot be directly viewed from the side intake hole 4 is attached between the upper intake hole 3 and the side intake hole 4 and the radiator 11. Yes.

ここで、本実施例では、エンジンカバー２の一側に、側壁面２１の上部を内側へ漸次傾けて上壁面２３に連なる上方斜面部２２を設け、前記上壁面２３で上方斜面部２２に近接した個所に上方吸気孔３を配置し、前記上方斜面部２２に側方吸気孔４を配置している。
前記上方斜面部２２は、上方に向かって内側へ傾く形状であれば、傾斜面（図２（ａ）参照）であっても、湾曲面（図４参照）であってもよい。
また、この発明では、図２（ｃ）に示すように、側壁面２１に上方斜面部２２を設けず、側壁面２１と上壁面２３とを直接突き合わせたような形状とするものであってもよい。 Here, in the present embodiment, an upper slope portion 22 is provided on one side of the engine cover 2 so that the upper portion of the side wall surface 21 is gradually inclined inward and continuous to the upper wall surface 23, and the upper wall surface 23 is close to the upper slope portion 22. The upper intake holes 3 are arranged at the above-mentioned locations, and the side intake holes 4 are arranged on the upper inclined surface portion 22.
The upper inclined surface portion 22 may be an inclined surface (see FIG. 2A) or a curved surface (see FIG. 4) as long as the upper inclined portion 22 is inclined inward.
Moreover, in this invention, as shown in FIG.2 (c), even if it is set as the shape where the side wall surface 21 and the upper wall surface 23 were faced | matched directly, without providing the upper slope part 22 in the side wall surface 21. FIG. Good.

前記遮蔽部材６は、図２（ｂ）に明瞭なように、上方吸気孔３の左サイドドア３１側の外端から垂下する第１垂直線Ｌ１と、ラジエタ１１側の内端から垂下する第２垂直線Ｌ２の間の機体左右方向となる横幅領域Ｗと、側方吸気孔４の上端から水平に延びる第１水平線Ｌ３と下端から水平に延びる第２水平線Ｌ４の間の機体上下方向となる縦幅領域Ｌとを同時に横切るように配置されることが好ましい。   As clearly shown in FIG. 2B, the shielding member 6 includes a first vertical line L1 that hangs from the outer end of the upper intake hole 3 on the left side door 31 side and a first vertical line L1 that hangs from the inner end of the radiator 11 side. The horizontal region W between the two vertical lines L2 and the horizontal direction W, and the vertical direction between the first horizontal line L3 extending horizontally from the upper end of the side intake hole 4 and the second horizontal line L4 extending horizontally from the lower end. It is preferable to be arranged so as to cross the vertical region L at the same time.

この遮蔽部材６の機能は、図２（ａ）に示すように、点線の矢印で示す機器類から発する動作音（例えばエンジン音やファン音等）は、一部が前記遮蔽部材６にぶつかってエンジンカバー２内で反射されるので、前記吸気孔３、４から外部へ直接放出される動作音は低減するので、周囲騒音を低減することができる。
これにより、回転軸が水平に設定された軸流ファン構成の冷却ファン１２の吸引能力が最も強く作用する側方吸気孔４をそのまま用いることができ、冷却空気の吸入効率を高めながら、騒音を低減させることができる。 As shown in FIG. 2A, the function of the shielding member 6 is that part of the operation sound (for example, engine sound, fan sound, etc.) emitted from the devices indicated by dotted arrows hits the shielding member 6. Since it is reflected in the engine cover 2, the operating sound directly emitted to the outside from the intake holes 3 and 4 is reduced, so that ambient noise can be reduced.
As a result, the side intake holes 4 in which the suction capability of the cooling fan 12 having the axial flow fan configuration in which the rotation axis is set horizontally can be used as it is, can be used as they are, and noise can be reduced while improving the efficiency of intake of the cooling air. Can be reduced.

また、前記上方吸気孔３および側方吸気孔４から流入された実線の矢印で示す吸入空気は、遮蔽部材６によって、それぞれ分離・整流されるので、ラジエタ１１前面で乱流を生じさせることがない。
遮蔽部材６の傾斜角度は特に限定されるものではなく、上方吸気孔３と側方吸気孔４の位置関係により最適な配置を実験的に定めることができる。
本実施例の場合、遮蔽部材６は、ラジエタの前面で、水平面に対して略４５度程度ないしそれ以上の角度に傾斜して取り付けることが好ましい。
図３は、遮蔽部材の傾斜角度をＸ軸として、傾斜角度が０度（遮蔽部材を設けない場合）、３０度、３７．５度、４５度、５２．５度、６０度、７５度、９０度とした場合の、圧損値を示すグラフである。
これにより、４５度に満たない角度の傾斜に比べて、４５度以上の角度の場合に遮蔽部材６が開口からの冷却空気の流入を妨げず、吸入空気の圧力損出を抑えうることが分かる。 In addition, since the intake air indicated by the solid arrows flowing in from the upper intake hole 3 and the side intake holes 4 is separated and rectified by the shielding member 6, turbulence may be generated in front of the radiator 11. Absent.
The inclination angle of the shielding member 6 is not particularly limited, and an optimal arrangement can be experimentally determined by the positional relationship between the upper intake holes 3 and the side intake holes 4.
In the case of the present embodiment, the shielding member 6 is preferably attached at an angle of about 45 degrees or more with respect to the horizontal plane on the front surface of the radiator.
FIG. 3 shows that the inclination angle of the shielding member is X axis, and the inclination angle is 0 degree (when no shielding member is provided), 30 degrees, 37.5 degrees, 45 degrees, 52.5 degrees, 60 degrees, 75 degrees, It is a graph which shows a pressure loss value at the time of setting it as 90 degree | times.
As a result, it is understood that the shielding member 6 does not prevent the cooling air from flowing in from the opening and the pressure loss of the intake air can be suppressed when the angle is 45 degrees or more compared to the inclination of the angle less than 45 degrees. .

図４に示す遮蔽部材６は、エンジンカバー２の一部に取り付けた場合の実施例を示す。
エンジンカバー２の一部を構成する左サイドドア３１の上部には、エンジンカバー２の上壁面２３の一部を構成する機体上方カバー３２が連設されている。 The shielding member 6 shown in FIG. 4 shows an embodiment when attached to a part of the engine cover 2.
A fuselage upper cover 32 constituting a part of the upper wall surface 23 of the engine cover 2 is connected to the upper part of the left side door 31 constituting a part of the engine cover 2.

前記左サイドドア３１は、エンジンカバー２の左側壁面となるドア面からなっている。
この左サイドドア３１は、図示例の場合、その上部に湾曲状に傾斜する上方斜面部２２を設けており、該上方斜面部２２に側方吸気孔４を穿設している。
また、前記機体上方カバー３２には、格子状の上方吸気孔３が形成された図示例構成からなっている。 The left side door 31 is a door surface that is the left wall surface of the engine cover 2.
In the case of the illustrated example, the left side door 31 is provided with an upper inclined surface portion 22 inclined in a curved shape at the upper portion thereof, and the side intake holes 4 are formed in the upper inclined surface portion 22.
Further, the airframe upper cover 32 has a configuration in the illustrated example in which a lattice-like upper air intake hole 3 is formed.

一方、遮蔽部材６は、略４５度に傾斜したプレート状の傾斜面本体７と、該傾斜面本体７の前方上端で略水平に延びる前方固定片部８と、傾斜面本体７の左右の側縁に沿って立ち上がる左右一対の側板９と、該側板９の上端からそれぞれ左右外方へ延びるブラケット状の一対の左右固定片部１０とからなっている。
そして前方固定片部８と一対の左右固定片部１０とは、上方吸気孔３をドア面寄りの外側位置で三方を囲むように左側上壁面構成部３２の内壁面に固着して、傾斜面本体７を傾斜姿勢に保持している。 On the other hand, the shielding member 6 includes a plate-like inclined surface main body 7 inclined at approximately 45 degrees, a front fixed piece 8 extending substantially horizontally at the front upper end of the inclined surface main body 7, and the left and right sides of the inclined surface main body 7. It consists of a pair of left and right side plates 9 rising along the edge, and a pair of left and right fixing pieces 10 in the form of brackets extending outward from the upper and lower sides of the side plates 9 respectively.
The front fixed piece portion 8 and the pair of left and right fixed piece portions 10 are fixed to the inner wall surface of the left upper wall surface constituting portion 32 so as to surround the upper intake hole 3 at three positions at the outer position near the door surface. The main body 7 is held in an inclined posture.

この左サイドドア３０は、排気孔５を形成した図示省略の右サイドドアと、両者の上方間を塞ぐ上壁面カバー（前記サイドドアに連接されて上壁面の一部となる機体上方カバーを含む）と、底面間を塞ぐ底壁面カバー（いずれも図示せず）とを組合せてボックス状のエンジンカバー２を構成するものであり、左サイドドア３０の組み付けによって、遮蔽部材６を同時に所定位置に取り付けることができる。   The left side door 30 includes a right side door (not shown) in which an exhaust hole 5 is formed, and an upper wall cover that covers a space between the upper side of both (an upper body cover that is connected to the side door and becomes a part of the upper wall surface). ) And a bottom wall surface cover (both not shown) for closing the space between the bottom surfaces to form the box-shaped engine cover 2. By assembling the left side door 30, the shielding member 6 is simultaneously moved to a predetermined position. Can be attached.

遮蔽部材６をエンジンカバー２に取り付ける構成は上記実施例に限定されるものではなく、スタンドやアームなどの適宜保持手段を用いて所定の姿勢に固定するものであればよい。
上記実施例では、油圧ショベルに適用した場合について説明したが、この発明では、その他の建設機械であってラジエタ等の熱交換機と上方吸気孔、側方吸気孔が形成されたエンジンカバーの内側に遮蔽部材を設けるものであってもよい。
その他、要するにこの発明の要旨を変更しない範囲で種々設計変更しうること勿論である。 The structure for attaching the shielding member 6 to the engine cover 2 is not limited to the above-described embodiment, and any structure may be used as long as it is fixed in a predetermined posture using appropriate holding means such as a stand or an arm.
In the above embodiment, a case where the present invention is applied to a hydraulic excavator has been described. However, in the present invention, a heat exchanger such as a radiator, an upper intake hole, and a side intake hole are formed inside an engine cover which is another construction machine. A shielding member may be provided.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

油圧ショベルの騒音低減構造を模式的に説明する断面図である。It is sectional drawing explaining typically the noise reduction structure of a hydraulic shovel. （ａ）は、図１における冷却空気の流入方向と騒音の放出方向を示す説明図、（ｂ）は遮蔽部材の好ましい配置例を示す説明図、（ｃ）はエンジンカバーの異なる形状を示す説明図である。(A) is explanatory drawing which shows the inflow direction of cooling air in FIG. 1, and the discharge | release direction of noise, (b) is explanatory drawing which shows the example of preferable arrangement | positioning of a shielding member, (c) is explanatory drawing which shows the different shape of an engine cover. FIG. 遮蔽部材の角度による圧力損失の比較を示すグラフである。It is a graph which shows the comparison of the pressure loss by the angle of a shielding member. 左サイドドアに遮蔽部材を固定した状態を示す内側から見上げた状態の斜視図である。It is a perspective view of the state looked up from the inside which shows the state which fixed the shielding member to the left side door. 従来の油圧ショベルの冷却空気の流れを模式的に説明する断面図である。It is sectional drawing which illustrates typically the flow of the cooling air of the conventional hydraulic shovel. 従来の冷却空気の流入方向と、騒音の放出方向を示す説明図である。It is explanatory drawing which shows the inflow direction of the conventional cooling air, and the discharge | release direction of a noise.

符号の説明Explanation of symbols

１ 油圧ショベル
１Ａ 上部旋回体
１Ｂ 下部走行体
２ エンジンカバー
３ 上方吸気孔
４ 側方吸気孔
５ 排気孔
６ 遮蔽部材
７ 傾斜面本体
８ 前方固定片部
９ 側板
１０ 左右固定片部
１１ ラジエタ
１２ 冷却ファン
１３ エンジン
１４ 油圧ポンプ
１５ マフラ
２１ 側壁面
２３ 上壁面
２２ 上方斜面部
３０ 機体吸気部分カバー構成部
３１ 左サイドドア
３２ 機体上方カバー
DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 1A Upper revolving body 1B Lower traveling body 2 Engine cover 3 Upper intake hole 4 Side intake hole 5 Exhaust hole 6 Shielding member 7 Inclined surface main body 8 Front fixed piece 9 Side plate 10 Left and right fixed piece 11 Radiator 12 Cooling fan 13 Engine 14 Hydraulic pump 15 Muffler 21 Side wall surface 23 Upper wall surface 22 Upper slope portion 30 Airframe intake portion cover component 31 Left side door 32 Airframe upper cover

Claims (3)

建設機械の上部旋回体に設けたエンジンカバーの内部で、エンジンカバーの上壁面に形成された上方吸気孔と、側壁面に形成された側方吸気孔との間を仕切り、前記上方吸気孔および側方吸気孔からエンジンカバーに内蔵されたラジエタ等の機器が直視できないように傾斜させた遮蔽部材を前記開口とラジエタとの間に取り付けてなる建設機械の騒音低減構造において、
エンジンカバーの一部を構成する左サイドドア側に、側壁面の上部を内側へ漸次傾けて上壁面に連なる上方斜面部を設け、前記上壁面で上方斜面部に近接した個所に上方吸気孔を配置し、前記上方斜面部に側方吸気孔を配置してなり、
遮蔽部材が、上方吸気孔の左サイドドア側の外端から垂下する第１垂直線とラジエタ側の内端から垂下する第２垂直線の間の機体左右方向となる横幅領域と、側方吸気孔の上端から水平に延びる第１水平線と下端から延びる第２水平線の間の機体上下方向となる縦幅領域とを同時に横切るように配置されていることを特徴とする建設機械の騒音低減構造。 Inside the engine cover provided in the upper swing body of the construction machine, a partition is formed between an upper intake hole formed in the upper wall surface of the engine cover and a side intake hole formed in the side wall surface, and the upper intake hole and Oite shielding member devices such as a radiator built from the side air intake hole in the engine cover is inclined so as not to direct the noise reduction structure for a construction machine comprising attached between the opening and the radiator,
On the left side door side that forms a part of the engine cover, an upper sloped portion that is connected to the upper wall surface is provided by gradually inclining the upper part of the side wall surface inward, and an upper intake hole is provided at a location near the upper sloped portion on the upper wall surface. Arranged, and a side intake hole is arranged on the upper slope part,
A horizontal width region between the first vertical line hanging from the outer end on the left side door side of the upper intake hole and the second vertical line hanging from the inner end on the radiator side, and the side intake air A noise reduction structure for a construction machine, wherein the structure is arranged so as to simultaneously traverse a vertical width region in the vertical direction of the machine body between a first horizontal line extending horizontally from the upper end of the hole and a second horizontal line extending from the lower end . 遮蔽部材が、水平面に対して４５度以上の角度に傾斜して配置されてなることを特徴とする請求項１に記載の建設機械の騒音低減構造。   The noise reduction structure for a construction machine according to claim 1, wherein the shielding member is arranged to be inclined at an angle of 45 degrees or more with respect to a horizontal plane. 遮蔽部材が、プレート状の傾斜面本体と、該傾斜面本体をエンジンカバーの内壁面に固定するための固定片部とからなっており、
エンジンカバーの一部を構成する左サイドドアの上部には、エンジンカバーの上壁面の一部を構成する機体上方カバーが連設されており、該機体上方カバーの内壁面に前記遮蔽部材を固定してなることを特徴とする請求項１または２に記載の建設機械の騒音低減構造。 The shielding member is composed of a plate-shaped inclined surface main body and a fixing piece for fixing the inclined surface main body to the inner wall surface of the engine cover,
A fuselage upper cover that forms part of the upper wall surface of the engine cover is connected to the upper part of the left side door that forms part of the engine cover, and the shielding member is fixed to the inner wall surface of the fuselage upper cover. The noise reduction structure for a construction machine according to claim 1 or 2, wherein
JP2004276245A 2004-09-22 2004-09-22 Construction machine noise reduction structure Active JP4280219B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2004276245A JP4280219B2 (en) 2004-09-22 2004-09-22 Construction machine noise reduction structure
PCT/JP2005/016097 WO2006033223A1 (en) 2004-09-22 2005-09-02 Noise reduction structure of construction machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004276245A JP4280219B2 (en) 2004-09-22 2004-09-22 Construction machine noise reduction structure

Publications (2)

Publication Number Publication Date
JP2006088857A JP2006088857A (en) 2006-04-06
JP4280219B2 true JP4280219B2 (en) 2009-06-17

Family

ID=36089987

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004276245A Active JP4280219B2 (en) 2004-09-22 2004-09-22 Construction machine noise reduction structure

Country Status (2)

Country Link
JP (1) JP4280219B2 (en)
WO (1) WO2006033223A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103741745A (en) * 2013-12-25 2014-04-23 柳州正菱集团有限公司 Excavator engine bin

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5657918U (en) * 1979-10-09 1981-05-19
JPH041626U (en) * 1990-04-16 1992-01-08
JPH09250344A (en) * 1996-03-19 1997-09-22 Hitachi Constr Mach Co Ltd Cooling device for heat exchanger of construction machine
JP2003003849A (en) * 2001-06-20 2003-01-08 Hitachi Constr Mach Co Ltd Engine cooling device for civil engineering/construction machinery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103741745A (en) * 2013-12-25 2014-04-23 柳州正菱集团有限公司 Excavator engine bin

Also Published As

Publication number Publication date
WO2006033223A1 (en) 2006-03-30
JP2006088857A (en) 2006-04-06

Similar Documents

Publication Publication Date Title
KR101923759B1 (en) Construction machine
US8684116B2 (en) Construction machine provided with engine room
JP5631360B2 (en) Intake / exhaust structure of engine-driven work machines
JP4160454B2 (en) Engine hood for construction machinery, engine room structure for construction machinery, and engine cooling device for construction machinery
JP4238206B2 (en) Work machine cooling system
JP3728144B2 (en) Soundproof engine driven work machine
JP2017002509A (en) Cooling structure for construction machine
US9297144B2 (en) Work machine
JP4280219B2 (en) Construction machine noise reduction structure
WO2004106710A1 (en) Construction machine bottom guard, construction machine engine room construction and construction machine cooling device
JP2023103214A (en) Construction machine
JP4387789B2 (en) Engine room structure of construction machinery
JP4199642B2 (en) Construction machine cooling air guide, construction machine cooling fan drive motor support and construction machine cooling device
JP2006291537A (en) Cooling structure of work machine
JP2002192960A (en) Engine hood for construction machine
JPH11247228A (en) Construction machine
JP4328221B2 (en) Construction machine cooling system
JP6700113B2 (en) Engine equipment
JP3096253U (en) Soundproof engine driven work machine
JP2004225625A (en) Cooling system of construction machine
JPH11254976A (en) Noise reducing device for construction machine and cover and exhaust part used for this device
JP6113121B2 (en) Engine driven work machine
JP2001159152A (en) Cooling device for construction machine
JP2005145114A (en) Engine hood of construction machinery, engine room structure of construction machinery, and cooling device of construction machinery
JP4383905B2 (en) Cooling package for swivel work machines

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060926

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20081203

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090128

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090218

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090313

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120319

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120319

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120319

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130319

Year of fee payment: 4