JP2011016402A - Sound insulation structure for engine room - Google Patents

Sound insulation structure for engine room Download PDF

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Publication number
JP2011016402A
JP2011016402A JP2009161087A JP2009161087A JP2011016402A JP 2011016402 A JP2011016402 A JP 2011016402A JP 2009161087 A JP2009161087 A JP 2009161087A JP 2009161087 A JP2009161087 A JP 2009161087A JP 2011016402 A JP2011016402 A JP 2011016402A
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engine room
lid
cover
exhaust port
sound insulation
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JP2009161087A
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Japanese (ja)
Inventor
Norikazu Toyama
憲和 遠山
伸也 ▲高▼瀬
Shinya Takase
Takayuki Igarashi
崇之 五十嵐
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Caterpillar Japan Ltd
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Caterpillar Japan Ltd
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Priority to JP2009161087A priority Critical patent/JP2011016402A/en
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Abstract

PROBLEM TO BE SOLVED: To obtain a device reducing the noise leaking out of a machine body at maximum while maintaining the cooling efficiency inside an engine room.SOLUTION: In a sound insulation structure for the engine room 2 of a working machine, two or more exhaust ports 8 are formed on a same sheet forming at least the engine room 2, the respective exhaust ports 8 are blocked by a plurality of louvers 6 in a shutter-like manner, and the upper part thereof is covered by a lid-like cover 1 opening only on one end side of the exhaust port 8. The hot air inside the engine room 2 goes out forming an appropriate flow without unnecessary stay although interrupted by the lid-like cover 1 and the louvers 6.

Description

この発明は、エンジンルームの遮音構造に関する。   The present invention relates to a sound insulation structure for an engine room.

従来、ホイールローダ、油圧ショベル等の作業機械では、エンジンルーム内にはオイルクーラ及びラジエータといった冷却装置、またそれらを冷却するための冷却用ファンが設置されている。冷却用ファンにより生じた冷却風は、オイルクーラ、ラジエータに接することによって、熱交換され、それら冷却装置の冷却効率を高く維持することができる。冷却風は、エンジンルーム内を循環後、熱風となり、エンジンルーム内の熱を逃がすためエンジンルームに設けられた排気口より排出される。   Conventionally, in work machines such as wheel loaders and hydraulic excavators, cooling devices such as an oil cooler and a radiator, and a cooling fan for cooling them are installed in the engine room. The cooling air generated by the cooling fan contacts the oil cooler and the radiator to exchange heat, and the cooling efficiency of these cooling devices can be maintained high. The cooling air becomes hot air after circulating in the engine room, and is discharged from an exhaust port provided in the engine room in order to release the heat in the engine room.

ところで、エンジンルーム内は、エンジンや冷却ファン等の駆動音により騒音が発生しており、上記した熱風が排気口から排出される際、その騒音が熱風とともに機体外部に漏れることになる。そこで、従来は、冷却用ファンによる冷却装置の冷却効率を下げないように考慮しつつ、外に漏れる騒音を軽減するために、エンジンルーム内の排気口周辺に遮音を目的としたガードを設ける種々の対策が採られている(例えば、特許文献1の図2、図4、特許文献2の図2、図4)。   Incidentally, noise is generated in the engine room due to driving sounds of the engine, the cooling fan, and the like, and when the hot air described above is discharged from the exhaust port, the noise leaks to the outside of the machine body along with the hot air. Therefore, conventionally, in order to reduce noise leaking outside while considering not to lower the cooling efficiency of the cooling device by the cooling fan, various guards for the purpose of sound insulation are provided around the exhaust port in the engine room. (For example, FIGS. 2 and 4 of Patent Document 1 and FIGS. 2 and 4 of Patent Document 2).

特開2004−353265号公報(図2、図4)JP 2004-353265 A (FIGS. 2 and 4) 特開2005−133661号公報(図2、図4)Japanese Patent Laying-Open No. 2005-133661 (FIGS. 2 and 4)

しかし、従来のガード構造では、いずれの構造も、空気の流れを遮断して騒音を軽減することと、空気の流れによるクーリング効果を向上させることとの双方のバランスが欠けるものとなっていた。   However, in any of the conventional guard structures, the balance between reducing the noise by blocking the air flow and improving the cooling effect by the air flow has been lacking.

この発明は、従来技術の以上のような問題に鑑み創案されたもので、エンジンルーム内の冷却効率を維持しつつ、かつ、機体外に漏れる騒音を極力減少させる装置を得ようとするものである。   The present invention was devised in view of the above-described problems of the prior art, and is intended to obtain a device that can reduce the noise leaking outside the aircraft as much as possible while maintaining the cooling efficiency in the engine room. is there.

このため、この発明に係るエンジンルームの遮音構造は、少なくとも、エンジンルームを形成する同一板上に2以上の排気口を形成させ、各排気口を、複数のルーバで鎧戸状に塞ぐとともに、その上部を、排気口の一端側のみ開口させる蓋状カバーで覆ったことを特徴とするものである。   For this reason, the sound insulation structure for the engine room according to the present invention has at least two exhaust ports formed on the same plate forming the engine room, and each exhaust port is closed with a plurality of louvers in the shape of an armor door, The upper part is covered with a lid-like cover that opens only at one end side of the exhaust port.

本発明では、排気口をルーバで鎧戸状に塞ぎ、さらにその上部を蓋状カバーで覆っており、排気口を通過する空気は二重に遮られることになる。したがって、その遮蔽効果により、エンジンルーム内からの騒音低減が図られる。その一方、少なくとも、エンジンルームを形成する同一板上に2以上の排気口を形成させるとともに、各排気口に配置される蓋状カバーは一端側が開口され、かつルーバは鎧戸状となっており、エンジンルーム内の熱風は、蓋状カバーとルーバに遮られつつも、不必要な滞留なしに適度な流れを形成しながら外部に出ていくことになる。すなわち、本発明では、二重の遮蔽物による熱風の効率的な遮蔽効果と、その遮蔽の中における空気の適度の流れによるクーリング効果とによって、エンジンルーム内の冷却と、機体外に漏れる騒音の低減の両方のバランスを図っている。   In the present invention, the exhaust port is closed with a louver in the shape of an armored door, and the upper part thereof is covered with a lid-like cover, so that air passing through the exhaust port is double blocked. Therefore, the noise from the engine room can be reduced by the shielding effect. On the other hand, at least two exhaust ports are formed on the same plate forming the engine room, and one end side of the lid-like cover disposed in each exhaust port is opened, and the louver has an armor door shape, While the hot air in the engine room is blocked by the lid-like cover and the louver, the hot air flows outside while forming an appropriate flow without unnecessary stagnation. That is, according to the present invention, cooling in the engine room and noise leaking outside the aircraft are achieved by the efficient shielding effect of hot air by the double shielding object and the cooling effect by the moderate flow of air in the shielding. We are trying to balance both reductions.

以上説明したように、この発明によれば、エンジンルーム内の冷却効率を維持しつつ、かつ、機体外に漏れる騒音を極力減少させることができる。   As described above, according to the present invention, it is possible to reduce the noise leaking out of the machine body as much as possible while maintaining the cooling efficiency in the engine room.

本発明に係る実施形態例を示す図である。図1(a)はホイールローダのエンジンルームの構成概要図、図1(b)はエンジンルーム底板の斜視図である。It is a figure which shows the example of embodiment which concerns on this invention. FIG. 1A is a schematic configuration diagram of an engine room of a wheel loader, and FIG. 1B is a perspective view of an engine room bottom plate. 本形態例が適用されるホイールローダを示し、図2(a)は、ホイールローダの全体構成を示す右側面図、図2(b)は、ホイールローダの車体後方を示す背面図である。FIG. 2A is a right side view showing the entire configuration of the wheel loader, and FIG. 2B is a rear view showing the rear of the vehicle body of the wheel loader.

本願に係る発明の具体的実施形態例を図面に基づき説明する。本形態例は、作業機械の代表例であるホイールローダに適用された一例を示す。なお、本願に係る発明が以下の形態例に限定されるものでないことは当然であり、適用される作業機械は、油圧ショベル等の他の車両であってももちろんよい。   Specific embodiments of the invention according to the present application will be described with reference to the drawings. The present embodiment shows an example applied to a wheel loader that is a typical example of a work machine. Of course, the invention according to the present application is not limited to the following embodiments, and the working machine to be applied may be another vehicle such as a hydraulic excavator.

図2は、本形態例が適用されるホイールローダを示し、同図(a)は、ホイールローダの全体構成を示す右側面図、同図(b)は、ホイールローダの車体後方を示す背面図である。図中、5は底板、6はルーバ、10はホイールローダ、11は車体フードを各示す。ホイールローダ10は、前部車体と後部車体とからなり、後部車体のフード11内に図1(a)に示すエンジンルーム2が配置される。後述するルーバ6は、本形態例においてはエンジンルーム底板5に配置される。   FIG. 2 shows a wheel loader to which the present embodiment is applied. FIG. 2 (a) is a right side view showing the entire configuration of the wheel loader, and FIG. 2 (b) is a rear view showing the rear side of the vehicle body of the wheel loader. It is. In the figure, 5 is a bottom plate, 6 is a louver, 10 is a wheel loader, and 11 is a vehicle body hood. The wheel loader 10 includes a front vehicle body and a rear vehicle body, and an engine room 2 shown in FIG. 1A is disposed in a hood 11 of the rear vehicle body. The louver 6 described later is disposed on the engine room bottom plate 5 in the present embodiment.

図1は本発明に係る実施形態例を示し、同図(a)はホイールローダのエンジンルームの構成概要図、同図(b)はエンジンルーム底板の斜視図である。図中、1は蓋状カバー、2はエンジンルーム、3はエンジン、4は冷却用ファン、5は底板、6はルーバ、7はラジエータ、8は排気口、9は吸気口である。また、矢印は風向きを示している。   FIG. 1 shows an embodiment of the present invention. FIG. 1 (a) is a schematic diagram of the configuration of an engine room of a wheel loader, and FIG. 1 (b) is a perspective view of an engine room bottom plate. In the figure, 1 is a cover, 2 is an engine room, 3 is an engine, 4 is a cooling fan, 5 is a bottom plate, 6 is a louver, 7 is a radiator, 8 is an exhaust port, and 9 is an intake port. Moreover, the arrow has shown the wind direction.

エンジンルーム2は、天井板に吸気口9が、底板5に排気口8が形成される。また、エンジンルーム2内には、エンジン3の側方に冷却ファン4が取り付けられ、その冷却ファン4に対面するようにラジエータ7が配置される。   In the engine room 2, an air inlet 9 is formed on the ceiling plate, and an air outlet 8 is formed on the bottom plate 5. In the engine room 2, a cooling fan 4 is attached to the side of the engine 3, and a radiator 7 is disposed so as to face the cooling fan 4.

前記底板5に形成される排気口8は、図示のように2箇所となっている。各排気口8には、複数のルーバ6が斜めに傾きながら並行に配置され、排気口8はそのルーバ6により鎧戸状に塞がれる。また、各排気口8の上部には、蓋状カバー1が配置される。蓋状カバー1は、一端のみ開口を有した蓋状であり、それが各排気口8の上部に配置されることで、排気口8の一端側(図では向かって左側)のみ開口させつつ覆うことになる。また、蓋状カバー1は、その天井部が閉じている側に向かって下っていくテーパ状に形成されている。この天井部のテーパの傾き方向は、前記ルーバ6の傾き方向と一致させている。   There are two exhaust ports 8 formed in the bottom plate 5 as shown in the figure. A plurality of louvers 6 are arranged in parallel at each exhaust port 8 while being inclined obliquely, and the exhaust ports 8 are closed by the louvers 6 in the shape of an armored door. A lid-like cover 1 is disposed above each exhaust port 8. The lid-like cover 1 has a lid shape having an opening only at one end, and is disposed at the upper part of each exhaust port 8 so that only one end side (left side in the figure) of the exhaust port 8 is opened and covered. It will be. The lid-like cover 1 is formed in a taper shape that descends toward the side where the ceiling portion is closed. The inclination direction of the taper of the ceiling portion is matched with the inclination direction of the louver 6.

このような本形態例では、冷却ファン4が駆動することで、天井板の吸気口9から外気が取り入れられ、ラジエータ7及びエンジン3を冷却していく中で、熱風となる。その熱風は、エンジンルーム2内を流れる途中で各排気口8に向かうが、排気口8はルーバ6で鎧戸状に塞がれ、さらにその上部が蓋状カバー1で覆われているので、熱風はそれらに二重に遮られながら、機体外に出て行くことになる。したがって、その遮蔽効果により、エンジンルーム2内からの騒音低減が図られることになる。   In this embodiment, when the cooling fan 4 is driven, outside air is taken in from the air inlet 9 of the ceiling plate, and hot air is generated while the radiator 7 and the engine 3 are being cooled. The hot air is directed to each exhaust port 8 in the middle of flowing through the engine room 2, but the exhaust port 8 is covered with a louver 6 like an armor door, and the upper part is covered with the lid cover 1, so hot air Will go out of the airframe while being double shielded by them. Accordingly, the noise from the engine room 2 is reduced by the shielding effect.

その一方、排気口8は底板5の2箇所に設けられ、また各排気口8に配置される蓋状カバー1は一端側が開口され、かつルーバ6は鎧戸状となっており、しかもカバー天井部のテーパとルーバ6は同じ傾斜方向となっていて、熱風は蓋状カバー1とルーバ6に遮られつつも、不必要な滞留なしに適度な流れを形成しながら外部に出ていくことになる。すなわち、本形態例は、二重の遮蔽物による熱風の効率的な遮蔽効果と、その遮蔽の中での適度の流れによるクーリング効果とによって、エンジンルーム2内の冷却と、機体外に漏れる騒音の低減の両方のバランスが図られるものとなっている。   On the other hand, the exhaust ports 8 are provided at two locations on the bottom plate 5, the lid-like cover 1 arranged at each exhaust port 8 is open at one end side, and the louver 6 is shaped like an armored door, and the ceiling of the cover The taper and the louver 6 have the same inclination direction, and the hot air is blocked by the lid-like cover 1 and the louver 6, but goes out to the outside while forming an appropriate flow without unnecessary stagnation. . In other words, the present embodiment provides cooling in the engine room 2 and noise leaking outside the airframe due to the efficient shielding effect of hot air by the double shielding object and the cooling effect by the moderate flow in the shielding. The balance of both reductions is to be achieved.

なお、本発明が以上の形態例に限定されないことはいうまでもなく、例えば排気口8が3以上設けられても、また排気口8が天井板や側板に設けられても、さらには蓋状カバー1やルーバ6の形状に変更があっても、それら態様の変更が、本願の特許請求の範囲に記載した構成に含まれ得る態様であれば、当然にその技術的範囲に含まれるものである。   Needless to say, the present invention is not limited to the above-described embodiments. For example, even when three or more exhaust ports 8 are provided, or even when the exhaust ports 8 are provided on a ceiling plate or a side plate, a lid shape is provided. Even if there is a change in the shape of the cover 1 or the louver 6, the change in the form is naturally included in the technical scope as long as it can be included in the configuration described in the claims of the present application. is there.

この発明は、エンジンルームの遮音構造に利用できる技術である。   The present invention is a technique that can be used for a sound insulation structure in an engine room.

1 蓋状カバー
2 エンジンルーム
6 ルーバ
8 排気口
1 Lid cover
2 Engine room
6 louvers
8 Exhaust vent

Claims (1)

少なくとも、エンジンルームを形成する同一板上に2以上の排気口を形成させ、各排気口を、複数のルーバで鎧戸状に塞ぐとともに、その上部を、排気口の一端側のみ開口させる蓋状カバーで覆ったエンジンルームの遮音構造。   At least two exhaust ports are formed on the same plate forming the engine room, and each exhaust port is closed with a plurality of louvers in the shape of an armored door, and the upper part is opened only on one end side of the exhaust port. Sound insulation structure of the engine room covered with.
JP2009161087A 2009-07-07 2009-07-07 Sound insulation structure for engine room Pending JP2011016402A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021020577A (en) * 2019-07-29 2021-02-18 株式会社Subaru Cover structure for engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6140424A (en) * 1984-07-31 1986-02-26 Yanmar Diesel Engine Co Ltd Case containing type engine generator
JP2004090689A (en) * 2002-08-29 2004-03-25 Kobelco Contstruction Machinery Ltd Construction machinery

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6140424A (en) * 1984-07-31 1986-02-26 Yanmar Diesel Engine Co Ltd Case containing type engine generator
JP2004090689A (en) * 2002-08-29 2004-03-25 Kobelco Contstruction Machinery Ltd Construction machinery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021020577A (en) * 2019-07-29 2021-02-18 株式会社Subaru Cover structure for engine

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