JP5599268B2 - Engine working machine - Google Patents

Engine working machine Download PDF

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JP5599268B2
JP5599268B2 JP2010200510A JP2010200510A JP5599268B2 JP 5599268 B2 JP5599268 B2 JP 5599268B2 JP 2010200510 A JP2010200510 A JP 2010200510A JP 2010200510 A JP2010200510 A JP 2010200510A JP 5599268 B2 JP5599268 B2 JP 5599268B2
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casing
duct portion
duct
intake
working machine
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JP2012057516A (en
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克明 田中
勇人 櫻木
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Nippon Sharyo Ltd
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Description

本発明は、エンジン作業機に関し、詳しくは、エンジン及び作業機を収容するケーシングの側壁に、ケーシングの内部に冷却用及び燃焼用の空気を取り入れるための吸気口を備えたエンジン作業機に関する。   The present invention relates to an engine working machine, and more particularly, to an engine working machine provided with an air inlet for taking in cooling and combustion air into a casing in a side wall of a casing that houses the engine and the working machine.

発電機や圧縮機などの作業機と、該作業機を駆動するエンジンとをケーシングの内部に収容したエンジン作業機では、ケーシングの側壁や、該側壁に設けられている点検扉に、冷却用及び燃焼用の空気を取り入れるための吸気口が設けられている。吸気口の内部側には吸気ダクトを設け、空気と共に雨水がケーシングの内部に浸入することを防止するとともに、防音効果を高めるようにしている（例えば、特許文献１参照。）。   In an engine working machine in which a working machine such as a generator or a compressor and an engine that drives the working machine are housed in the casing, the side wall of the casing and the inspection door provided on the side wall are provided with cooling and An intake port is provided for intake of combustion air. An intake duct is provided on the inner side of the intake port to prevent rainwater from entering the casing together with air and to enhance the soundproofing effect (see, for example, Patent Document 1).

特開２００３−２３９７５８号公報JP 2003-239758 A

しかし、従来の吸気ダクトの構造は、雨水浸入防止、防音などの効果は十分に得られるものの、構造が複雑であり、製造コストが上昇するという不都合があった。   However, the structure of the conventional air intake duct, although sufficient effects such as prevention of rainwater intrusion and soundproofing are obtained, has a disadvantage that the structure is complicated and the manufacturing cost increases.

そこで本発明は、簡単な構造で十分な雨水浸入防止効果、防音効果を得ることができる吸気ダクトを備えたエンジン作業機を提供することを目的としている。   SUMMARY OF THE INVENTION An object of the present invention is to provide an engine working machine having an intake duct that can obtain a rainwater infiltration prevention effect and a soundproofing effect with a simple structure.

上記目的を達成するため、本発明のエンジン作業機は、ケーシングの側面に設けた吸気口及び該吸気口の内部に連続した吸気ダクトを備えた前記ケーシングの内部にエンジン及び該エンジンにより駆動される作業機を収容したエンジン作業機において、前記吸気ダクトは、上端部に吸気出口が開口した上部ダクト部と下端部の外側に前記吸気口が開口した下部ダクト部とを上下に連設した縦長の箱状に形成され、前記ケーシングの側面と前記上部ダクト部のケーシング内側壁との間の寸法に対して、前記ケーシングの側面と前記下部ダクト部のケーシング内側壁との間の寸法を大きくして、前記下部ダクト部のケーシング内側壁を前記上部ダクト部のケーシング内側壁よりもケーシング内方に配置することにより、前記下部ダクト部の流路面積を前記上部ダクト部の流路面積より大きくするとともに、前記上部ダクト部の流路面積を前記吸気口の開口面積と同等あるいは同等以上の面積に形成し、前記下部ダクト部のケーシング内側壁の上端を、前記吸気口の開口上端より上方に位置させ、前記下部ダクト部のケーシング内側壁の上端と前記上部ダクト部のケーシング内側壁の下端とを接続する連結パネルを、前記吸気口の開口上端より上方に設けたことを特徴としている。 To achieve the above object, an engine working machine of the present invention is driven by the engine and the engine inside the casing with a continuous inlet duct into the intake port and the intake port is provided on the side surface of the casing In the engine working machine that accommodates the working machine, the intake duct is a vertically long structure in which an upper duct part having an intake outlet opened at an upper end part and a lower duct part having an intake port opened outside a lower end part are connected vertically. It is formed in a box shape, and the dimension between the side surface of the casing and the casing inner wall of the lower duct part is made larger than the dimension between the side surface of the casing and the casing inner wall of the upper duct part. , by arranging the casing side walls of the lower duct section to the casing inwards than the casing inner wall of the upper duct section, the passage surface of the lower duct portion Is larger than the flow passage area of the upper duct portion, and the flow passage area of the upper duct portion is equal to or larger than the opening area of the intake port, and the upper end of the inner wall of the casing of the lower duct portion and is positioned above the open top of the intake port, the connection panel for connecting the lower end of the upper casing inner wall of the upper duct of the casing inner wall of the lower duct section, from the open top of the intake port It is characterized by being provided above .

さらに、本発明のエンジン作業機は、前記連結パネルが、水平方向であるか、又は、下部ダクト部のケーシング内側壁の上端から上部ダクト部のケーシング内側壁の下端に向かって傾斜して設けられていること、前記下部ダクト部の底板が、ケーシングの内側から外側に向かう下り勾配を有しており、底板の下り勾配先端が接する吸気口の開口下端が吸気ダクト内の水をケーシングの外部に排出する水抜き孔を兼ねていることを特徴としている。
Further, in the engine work machine of the present invention, the connection panel is provided in a horizontal direction or inclined from the upper end of the casing inner wall of the lower duct part toward the lower end of the casing inner wall of the upper duct part. The bottom plate of the lower duct part has a downward slope from the inside to the outside of the casing, and the lower end of the inlet opening that contacts the downward slope tip of the bottom plate causes the water in the intake duct to flow outside the casing. It is characterized and Turkey serve as the discharge to the drain hole.

本発明のエンジン作業機によれば、吸気ダクトの下部ダクト部のケーシング内側壁をケーシング内方に配置したことにより、下部ダクト部の流路面積を大きくできるので、吸気口から吸い込まれた空気の風速を低くして空気に同伴されて吸気口から吸気ダクト内に浸入した雨水を下部ダクト部内で分離することができ、上部ダクト部の上端に開口した吸気出口から雨水がケーシングの内部に浸入することを防止できる。   According to the engine working machine of the present invention, the flow passage area of the lower duct portion can be increased by arranging the casing inner wall of the lower duct portion of the intake duct inside the casing, so that the air sucked from the intake port can be increased. Rainwater entering the intake duct from the air inlet with the wind speed lowered can be separated in the lower duct part, and rainwater enters the inside of the casing from the intake outlet opened at the upper end of the upper duct part Can be prevented.

本発明のエンジン作業機の一形態例を示す正面図である。It is a front view which shows one example of an engine working machine of this invention. 図１のII−II断面図である。It is II-II sectional drawing of FIG. 要部の断面図である。It is sectional drawing of the principal part. 吸気ダクトの他の形状例を示す要部の断面図である。It is sectional drawing of the principal part which shows the other example of a shape of an air intake duct.

エンジン作業機１１は、防音構造を有するケーシング１２の内部に、発電機やコンプレッサ、油圧ユニットなどの作業機（図示せず）や、該作業機を駆動するエンジン１３などの機器を収容したものであって、ケーシング１２の側壁１２ａには、エンジン１３などの保守作業を行うための点検扉１４が設けられている。側壁１２ａ及び点検扉１４の下部には、ケーシング１２の内部に冷却用及び燃焼用の空気を取り入れるための吸気口１５がそれぞれ設けられるとともに、該吸気口１５の内部には、吸気口１５から吸い込んだ空気に同伴された雨水を分離するとともに、エンジン１３などから発生する騒音が外部に漏れないようにするための吸気ダクト１６が設けられている。   The engine work machine 11 contains a work machine (not shown) such as a generator, a compressor, and a hydraulic unit, and a device such as an engine 13 that drives the work machine inside a casing 12 having a soundproof structure. An inspection door 14 for performing maintenance work for the engine 13 and the like is provided on the side wall 12a of the casing 12. In the lower part of the side wall 12 a and the inspection door 14, an intake port 15 for taking in air for cooling and combustion is provided inside the casing 12, and the intake port 15 is sucked from the intake port 15. An intake duct 16 is provided for separating rainwater accompanying the air and preventing noise generated from the engine 13 and the like from leaking outside.

吸気ダクト１６は、上端部に吸気出口１７が開口した上部ダクト部１８と、下端部の外側に前記吸気口１５が開口した下部ダクト部１９とを上下に連設した縦長の箱状に形成されており、下部ダクト部１９の下方には、ケーシング１２の内側から外側に向かう下り勾配を有する底板２０が配置されている。両ダクト部１８，１９の両側には、一対の側パネル２１がそれぞれ配置されており、両ダクト部１８，１９のケーシング外部側の外パネル２２は、側壁１２ａ又は点検扉１４のパネルで兼用している。   The intake duct 16 is formed in a vertically long box shape in which an upper duct portion 18 having an intake outlet 17 opened at an upper end portion and a lower duct portion 19 having an intake port 15 opened outside the lower end portion are vertically connected. A bottom plate 20 having a downward gradient from the inside to the outside of the casing 12 is disposed below the lower duct portion 19. A pair of side panels 21 are arranged on both sides of the duct portions 18 and 19, respectively, and the outer panel 22 outside the casing of both the duct portions 18 and 19 is also used as the side wall 12a or the panel of the inspection door 14. ing.

一対の側パネル２１及び外パネル２２を共通とした上部ダクト部１８と下部ダクト部１９とにおいて、下部ダクト部１９のケーシング内側壁（以下、下部内パネル１９ａという）は、上部ダクト部１８のケーシング内側壁（以下、上部内パネル１８ａという）よりもケーシング１２の内方に突出するように、すなわち、上部ダクト部１８における外パネル２２と上部内パネル１８ａとの間の寸法Ｌａに対して、下部ダクト部１９における外パネル２２と下部内パネル１９ａとの間の寸法Ｌｂが大きくなるように形成され、下部内パネル１９ａの上端と上部内パネル１８ａの下端との間は、水平方向の連結パネル２３によって接続されている。上部ダクト部１８の流路面積は、前記吸気口１５の開口面積と同等、あるいは同等以上の面積に形成され、下部ダクト部１９の流路面積は、下部内パネル１９ａが上部内パネル１８ａよりもケーシング１２の内方に突出している分だけ大きくなり、吸気口１５の開口面積より大きな面積となっている。   In the upper duct portion 18 and the lower duct portion 19 that share the pair of side panels 21 and the outer panel 22, the casing inner wall of the lower duct portion 19 (hereinafter referred to as the lower inner panel 19 a) is the casing of the upper duct portion 18. Projecting inward of the casing 12 from the inner wall (hereinafter referred to as the upper inner panel 18a), that is, with respect to the dimension La between the outer panel 22 and the upper inner panel 18a in the upper duct portion 18, the lower portion A dimension Lb between the outer panel 22 and the lower inner panel 19a in the duct portion 19 is formed to be large, and a horizontal connecting panel 23 is provided between the upper end of the lower inner panel 19a and the lower end of the upper inner panel 18a. Connected by. The flow passage area of the upper duct portion 18 is formed to be equal to or larger than the opening area of the intake port 15, and the flow passage area of the lower duct portion 19 is such that the lower inner panel 19a is more than the upper inner panel 18a. The size is larger by the amount protruding inward of the casing 12, and is larger than the opening area of the intake port 15.

前記連結パネル２３は、前記吸気口１５の開口上端１５ａより上方に設け、前記底板２０は、下り勾配先端が吸気口１５の開口下端１５ｂに接するように設けることにより、下部ダクト部１９の下端は、吸気口１５の開口下端１５ｂと同じ高さに位置し、下部ダクト部１９の上端は、吸気口１５の開口上端１５ａより上方に位置するように形成されている。また、前記底板２０の下り勾配先端が接する吸気口１５の開口下端１５ｂは、吸気ダクト１６内に浸入した雨水をケーシング１２の外部に排出する水抜き孔を兼ねるように形成されている。   The connection panel 23 is provided above the opening upper end 15a of the intake port 15, and the bottom plate 20 is provided so that the tip of the descending slope is in contact with the opening lower end 15b of the intake port 15, whereby the lower end of the lower duct portion 19 is The upper end of the lower duct portion 19 is located above the upper open end 15a of the intake port 15 and is located at the same height as the lower open end 15b of the intake port 15. The opening lower end 15b of the air inlet 15 with which the tip of the bottom plate 20 contacts is formed so as to serve as a drain hole for discharging rainwater that has entered the air intake duct 16 to the outside of the casing 12.

このように、吸気口１５の内部に設けた吸気ダクト１６を、上部ダクト部１８と下部ダクト部１９とで形成し、下部ダクト部１９の下部内パネル１９ａをケーシング１２の内方に突出するように配置することにより、下部ダクト部１９の流路面積を吸気口１５の開口面積より大きくすることができるので、吸気口１５を通過する空気の流速に比べて下部ダクト部１９を流れる空気の流速を低くすることができる。これにより、吸気口１５から下部ダクト部１９内に空気に同伴されて浸入した雨水を、下部ダクト部１９で空気の流れから分離することができる。   In this way, the intake duct 16 provided inside the intake port 15 is formed by the upper duct portion 18 and the lower duct portion 19 so that the lower inner panel 19 a of the lower duct portion 19 protrudes inward of the casing 12. Since the flow passage area of the lower duct portion 19 can be made larger than the opening area of the intake port 15, the flow velocity of the air flowing through the lower duct portion 19 compared to the flow velocity of the air passing through the intake port 15. Can be lowered. As a result, the rainwater that has entered the lower duct portion 19 through the air inlet 15 can be separated from the air flow by the lower duct portion 19.

また、連結パネル２３を吸気口１５の開口上端１５ａより上方に設けることにより、吸気口１５から下部ダクト部１９内に浸入した雨水を確実に空気の流れから分離することができる。さらに、下部内パネル１９ａに雨水が付着して空気流れにより上昇するようなことがあっても、水平方向の連結パネル２３によって下部内パネル１９ａから上部内パネル１８ａへの上昇を防止することができる。したがって、吸気出口１７からケーシング１２の内部に雨水が浸入してエンジン１３などに付着することを防止でき、下部ダクト部１９内で分離した雨水は、底板２０の傾斜を利用して吸気口１５の開口下端１５ｂから外部に迅速に排出することができる。   Further, by providing the connection panel 23 above the upper opening 15a of the intake port 15, rainwater that has entered the lower duct portion 19 from the intake port 15 can be reliably separated from the air flow. Furthermore, even if rainwater adheres to the lower inner panel 19a and rises due to the air flow, the horizontal connection panel 23 can prevent the lower inner panel 19a from rising to the upper inner panel 18a. . Therefore, rainwater can be prevented from entering the casing 12 from the intake port 17 and adhering to the engine 13 or the like, and the rainwater separated in the lower duct portion 19 can be removed from the intake port 15 using the inclination of the bottom plate 20. It can be quickly discharged to the outside from the opening lower end 15b.

また、上部ダクト部１８の流路面積を吸気口１５の開口面積と同等以上に設定することにより、ケーシング１２の内部に流入する空気の風量が低下することはなく、ケーシング１２内の冷却効果を損なうこともない。さらに、簡単な加工を施した数枚の金属薄板を接合するだけで上部ダクト部１８及び下部ダクト部１９を有する吸気ダクト１６を形成することができるので、製造や組立が容易であり、製造コストの上昇も抑えることができる。   Further, by setting the flow passage area of the upper duct portion 18 to be equal to or larger than the opening area of the intake port 15, the air volume flowing into the casing 12 does not decrease, and the cooling effect in the casing 12 is reduced. There is no loss. Furthermore, since the intake duct 16 having the upper duct portion 18 and the lower duct portion 19 can be formed by simply joining several thin metal plates that have been subjected to simple processing, manufacturing and assembly are easy, and the manufacturing cost is reduced. The rise of can also be suppressed.

また、ケーシング１２の内部に収容されているエンジン１３は、上部にエキゾーストパイプ１３ａをはじめとする各種部品が設けられ、中間部にもスタータやダイナモ１３ｂなどが設けられて幅広になっているのに対し、下端のオイルパン１３ｃの部分は上部に比べて幅狭になっているので、下部ダクト部１９を、オイルパン１３ｃと側壁１２ａ又は点検扉１４との間に配置するように、吸気口１５を側壁１２ａ又は点検扉１４の下部に設けることにより、吸気ダクト１６をエンジン１３に隣接して配置する場合でも、下部ダクト部１９の前記寸法Ｌｂを大きく取ることができ、ケーシング１２を小型化しても下部ダクト部１９の流路面積を十分に大きくすることができる。   The engine 13 housed in the casing 12 is widened with various parts including an exhaust pipe 13a at the top and a starter, dynamo 13b, etc. at the middle. On the other hand, since the lower part of the oil pan 13c is narrower than the upper part, the lower duct portion 19 is arranged between the oil pan 13c and the side wall 12a or the inspection door 14 so that the air intake 15 Is provided in the lower portion of the side wall 12a or the inspection door 14, even when the intake duct 16 is disposed adjacent to the engine 13, the dimension Lb of the lower duct portion 19 can be increased, and the casing 12 can be downsized. In addition, the flow area of the lower duct portion 19 can be sufficiently increased.

さらに、図４に示すように、下部内パネル１９ａの上端と上部内パネル１８ａの下端との間を接続する連結パネル２３を、下部ダクト部１９から上部ダクト部１８に向かって流路面積が次第に減少する方向に傾斜させて配置することにより、下部ダクト部１９と上部ダクト部１８との間の流路面積が急激に減少することがなくなるので、この部分の通気抵抗を減少させることができ、吸気口１５からケーシング１２の内部への空気の吸込をより効果的に行うことができる。   Further, as shown in FIG. 4, the connecting panel 23 connecting the upper end of the lower inner panel 19 a and the lower end of the upper inner panel 18 a is gradually increased in flow path area from the lower duct portion 19 toward the upper duct portion 18. By inclining and arranging in the decreasing direction, the flow area between the lower duct portion 19 and the upper duct portion 18 does not decrease rapidly, so the ventilation resistance of this portion can be reduced, Air can be sucked from the air inlet 15 into the casing 12 more effectively.

なお、上部ダクト部１８の寸法Ｌａに対する下部ダクト部１９の寸法Ｌｂは、吸気口１５の開口面積や空気吸込量に応じて設定することができ、連結パネル２３の位置や傾斜も、空気流れからの雨水の分離を行える範囲で適宜設定することができる。   In addition, the dimension Lb of the lower duct part 19 with respect to the dimension La of the upper duct part 18 can be set according to the opening area of the inlet port 15 and the air suction amount, and the position and inclination of the connection panel 23 are also determined from the air flow. As long as the rainwater can be separated, it can be set as appropriate.

１１…エンジン作業機、１２…ケーシング、１２ａ…側壁、１３…エンジン、１３ａ…エキゾーストパイプ、１３ｂ…ダイナモ、１３ｃ…オイルパン、１４…点検扉、１５…吸気口、１５ａ…開口上端、１５ｂ…開口下端、１６…吸気ダクト、１７…吸気出口、１８…上部ダクト部、１８ａ…上部内パネル、１９…下部ダクト部、１９ａ…下部内パネル、２０…底板、２１…側パネル、２２…外パネル、２３…連結パネル   DESCRIPTION OF SYMBOLS 11 ... Engine working machine, 12 ... Casing, 12a ... Side wall, 13 ... Engine, 13a ... Exhaust pipe, 13b ... Dynamo, 13c ... Oil pan, 14 ... Inspection door, 15 ... Inlet, 15a ... Upper end of opening, 15b ... Opening Lower end, 16 ... intake duct, 17 ... intake outlet, 18 ... upper duct portion, 18a ... upper inner panel, 19 ... lower duct portion, 19a ... lower inner panel, 20 ... bottom plate, 21 ... side panel, 22 ... outer panel, 23 ... Connection panel

Claims (4)

ケーシングの側面に設けた吸気口及び該吸気口の内部に連続した吸気ダクトを備えた前記ケーシングの内部にエンジン及び該エンジンにより駆動される作業機を収容したエンジン作業機において、
前記吸気ダクトは、上端部に吸気出口が開口した上部ダクト部と下端部の外側に前記吸気口が開口した下部ダクト部とを上下に連設した縦長の箱状に形成され、
前記ケーシングの側面と前記上部ダクト部のケーシング内側壁との間の寸法に対して、前記ケーシングの側面と前記下部ダクト部のケーシング内側壁との間の寸法を大きくして、前記下部ダクト部のケーシング内側壁を前記上部ダクト部のケーシング内側壁よりもケーシング内方に配置することにより、前記下部ダクト部の流路面積を前記上部ダクト部の流路面積より大きくするとともに、前記上部ダクト部の流路面積を前記吸気口の開口面積と同等あるいは同等以上の面積に形成し、
前記下部ダクト部のケーシング内側壁の上端を、前記吸気口の開口上端より上方に位置させ、
前記下部ダクト部のケーシング内側壁の上端と前記上部ダクト部のケーシング内側壁の下端とを接続する連結パネルを、前記吸気口の開口上端より上方に設けたことを特徴とするエンジン作業機。 In an engine working machine that houses a working machine driven by the engine and the engine inside the casing with a continuous inlet duct into the intake port and the intake port is provided on the side surface of the casing,
The intake duct is formed in a vertically long box shape in which an upper duct portion having an intake outlet opened at an upper end portion and a lower duct portion having an intake opening opened to the outside of a lower end portion are connected vertically .
The dimension between the side surface of the casing and the casing inner wall of the lower duct part is increased with respect to the dimension between the side surface of the casing and the casing inner wall of the upper duct part. By disposing the inner wall of the casing inside the casing than the inner wall of the upper duct portion, the flow area of the lower duct portion is made larger than the flow area of the upper duct portion, and the upper duct portion The flow passage area is formed to be equal to or larger than the opening area of the intake port,
The upper end of the inner wall of the casing of the lower duct portion is positioned above the upper end of the intake opening,
Engine working machine, characterized in that the upper end of the casing side wall of the lower duct portion connecting panel for connecting the lower end of the casing side wall of the upper duct section, provided above the open top of the intake port. 前記連結パネルは、水平方向であることを特徴とする請求項１記載のエンジン作業機。 The engine work machine according to claim 1, wherein the connection panel is in a horizontal direction . 前記連結パネルは、下部ダクト部のケーシング内側壁の上端から上部ダクト部のケーシング内側壁の下端に向かって傾斜して設けられていることを特徴とする請求項１記載のエンジン作業機。 The connection panel, the engine working machine according to claim 1 Symbol mounting, characterized in that it is provided to be inclined from the upper end of the casing side wall of the lower duct portion toward the lower end of the casing side wall of the upper duct portion. 前記下部ダクト部の底板は、ケーシングの内側から外側に向かう下り勾配を有しており、底板の下り勾配先端が接する吸気口の開口下端が吸気ダクト内の水をケーシングの外部に排出する水抜き孔を兼ねていることを特徴とする請求項１乃至３のいずれか１項記載のエンジン作業機。 The bottom plate of the lower duct portion has a downward slope from the inside to the outside of the casing, and the lower end of the intake opening that contacts the tip of the downward slope of the bottom plate drains the water in the intake duct to the outside of the casing. The engine working machine according to any one of claims 1 to 3, wherein the engine working machine also serves as a hole .
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