JPS5842576Y2 - Engine dust control device - Google Patents
Engine dust control deviceInfo
- Publication number
- JPS5842576Y2 JPS5842576Y2 JP4467677U JP4467677U JPS5842576Y2 JP S5842576 Y2 JPS5842576 Y2 JP S5842576Y2 JP 4467677 U JP4467677 U JP 4467677U JP 4467677 U JP4467677 U JP 4467677U JP S5842576 Y2 JPS5842576 Y2 JP S5842576Y2
- Authority
- JP
- Japan
- Prior art keywords
- pulley
- flange
- dustproof
- air
- engine
- 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.)
- Expired
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【考案の詳細な説明】
コンバイン等の農業機械に搭載する空冷エンジンに於て
、作業中に外気をエンジンの冷却ファンで吸引する場合
、周囲の外気中に浮遊しているわらぼこり、わらくずま
で冷却ファンで吸引し、ファンカバー内に入り、それら
がエンジンの熱点（例えばシリンダー、シリンダーヘッ
ド等）に接触し、火災を引起す場合がある。[Detailed description of the invention] When an air-cooled engine installed in agricultural machinery such as a combine harvester uses the engine's cooling fan to suck in outside air during work, straw dust and straw debris floating in the surrounding outside air are removed. These substances may be sucked up by the cooling fan and enter the fan cover, where they may come into contact with hot spots in the engine (e.g. cylinder, cylinder head, etc.) and cause a fire.
特にコンバインに搭載する場合は、レイアウトの関係で
わらカッター等の近くにエンジンが配置されるため、エ
ンジン上から落下して来るわらくずまでも前述の如く冷
却空気と共に吸引して火災を誘発する恐れがある。Especially when mounted on a combine harvester, the engine is placed near the straw cutter etc. due to the layout, so there is a risk that straw debris falling from the engine may be sucked in along with the cooling air and cause a fire. There is.
従って冷却空気吸引用の冷蔵ファンの前方に防塵プーリ
ーを取付け、わらくず等の侵入を極力防ぐ必要がある。Therefore, it is necessary to install a dustproof pulley in front of the refrigeration fan for sucking cooling air to prevent the intrusion of straw debris as much as possible.
本考案はファンケースの空気吸入口部分と防塵プーリー
外周縁部分との間に２重構造の迷路を形成すると共にプ
ーリー外周に近ずいて来たわらくずを切断飛散させてフ
ァンケースと防塵プーリーの境界部分からのわらくず等
の侵入を防止しようとするもので、次に図面により説明
する。The present invention forms a double-structure maze between the air inlet of the fan case and the outer periphery of the dust-proof pulley, and cuts and scatters straw debris that approaches the outer periphery of the pulley to separate the fan case and the dust-proof pulley. This is intended to prevent straw waste from entering from the boundary area, and will be explained below with reference to the drawings.
第１図は本考案を適用した空冷エンジンを一部垂直断面
で示す側面図で、１はファンケース ２は冷却ファン、
３はクランク軸、４は防塵プーリーである。Figure 1 is a side view partially showing a vertical section of an air-cooled engine to which the present invention is applied, in which 1 is a fan case, 2 is a cooling fan,
3 is a crankshaft, and 4 is a dustproof pulley.
第１図の一部を拡大した第２図に於て、ファンケース１
はクランク軸中心線Ｏ−Ｏと同心の筒状フランジ５を一
体に備え、このフランジ５により空気吸入口６が形Ｉｆ
ｆされている。In Figure 2, which is a partially enlarged view of Figure 1, fan case 1 is shown.
is integrally equipped with a cylindrical flange 5 concentric with the crankshaft center line O-O, and this flange 5 allows the air intake port 6 to form a shape If
It has been f.
７は始動プーリーで複数個のボルト８により冷却ファン
のポス９に固定されている。A starting pulley 7 is fixed to a post 9 of the cooling fan with a plurality of bolts 8.
防塵プーリー４は内周の筒状フランジ１０の部分で始動
プーリー７に嵌合し、溶接その他の手段により固定され
ている。The dust-proof pulley 4 is fitted into the starting pulley 7 at a cylindrical flange 10 on its inner circumference, and is fixed by welding or other means.
１１は防塵プーリー４の円錐形側面に設けた防塵網付窓
孔で、本考案に於て防塵網としてはメタルラス、パンチ
ングメタル等が採用されている。Reference numeral 11 denotes a window hole with a dustproof screen provided on the conical side surface of the dustproof pulley 4. In the present invention, metal lath, punched metal, etc. are used as the dustproof screen.
防塵網は、わらくず等の透過は不可能にし、空気のみを
透過させている。The dustproof screen makes it impossible for straw waste to pass through, and only allows air to pass through.
また１２は防塵プーリー４の本体外周部に回転軸方向側
に設けた筒状のプーリーフランジ、１３は、１２とは別
に成形後防塵プーリー４の本体に固定した筒状のプーリ
ーフランジ、１４．１５はそれぞれフランジ１２，５の
先端と相手部材との間の隙間（幅１１４，１１５）、１
６，１７はフランジ１２，５間及びフランジ５゜１３間
の隙間（幅’１６ ＋ Ａ１□）で、各隙間の幅は隣接
したフランジが互いに干渉しない範囲でできるだけ小さ
い程その効果は太きい。Further, 12 is a cylindrical pulley flange provided on the outer periphery of the main body of the dustproof pulley 4 in the direction of the rotation axis, 13 is a cylindrical pulley flange fixed to the main body of the dustproof pulley 4 after molding separately from 12, 14.15 are the gaps (widths 114, 115) between the tips of the flanges 12, 5 and the mating member, respectively, and 1
Reference numerals 6 and 17 are gaps (width '16 + A1□) between flanges 12 and 5 and between flanges 5 and 13, and the effect is greater as the width of each gap is as small as possible within a range where adjacent flanges do not interfere with each other.
従って隙間１４〜１７により途中で１８００湾曲した狭
い迷路が形成される。Therefore, the gaps 14 to 17 form a narrow labyrinth with an 1800 degree curve in the middle.
エンジン運転中空気吸入口６の内部（図の右側）は冷却
ファン２の吸引力により負圧状態となり、外気は窓孔１
１を通して実線矢印で示すように吸入される。During engine operation, the inside of the air intake port 6 (on the right side of the figure) is in a negative pressure state due to the suction force of the cooling fan 2, and the outside air is
1 and is inhaled as shown by the solid arrow.
内部の負圧により隙間１４〜１７から戊る迷路にも内方
へ向う空気流が発生しようとするが、迷路は前述の如く
充分狭く絞られており、しかも途中で１８００湾曲して
いるためわらくず等は入りにくくなり、これＧこよりわ
らくず等の侵入を防止することができる。Due to the negative pressure inside, an inward air flow is generated in the labyrinth that opens from the gaps 14 to 17, but the labyrinth is sufficiently narrow as mentioned above and has an 1800 degree curve in the middle, so there is no flow of air. It becomes difficult for debris etc. to enter, and this makes it possible to prevent straw debris etc. from entering.
別の実施例として第３図の如くファンケース１の本体と
筒状フランジ５の接続部分に比較的曲率半径の大きい円
弧状湾曲部５ａを設け、プーリーフランジ１２の先端（
図の右端）が湾曲部５ａの途中に対向するようにプーリ
ーフランジ１２の位置を定めたものである。As another example, as shown in FIG.
The pulley flange 12 is positioned so that the right end (in the figure) is halfway opposed to the curved portion 5a.
本考案のもう一つの特徴である第４図の如くプーリーフ
ランジ１２の先端縁１９に山形の切欠２０を多数配置す
ると、隙間１６に入り込もうとするわらくず等が切欠２
０の縁により引っかけられて切断されると同時に跳ね飛
ばされ、湾曲部５ａに沿い破線矢印で示す如く隙間１６
から遠方に引離され、わらくず等の侵入を一層効果的に
防止することができる。Another feature of the present invention is that a large number of chevron-shaped notches 20 are arranged on the tip edge 19 of the pulley flange 12 as shown in FIG.
It is caught by the edge of 0, cut, and at the same time it is thrown off, creating a gap 16 along the curved part 5a as shown by the broken line arrow.
This makes it possible to more effectively prevent the intrusion of straw waste and the like.
切欠２０かない場合は、隙間１６（こ入りこんだ一部の
わらくずが堆積して、フランジ１２の回転（こよる摩擦
発熱で、わうくずが発火し、火災（こ至る場合がある。If the notch 20 is not present, some of the straw debris that has gotten into the gap 16 may accumulate, causing the rotation of the flange 12 (frictional heat generation) to ignite the straw debris, which may lead to a fire.
従来第５図の防塵対策は既に提案（特公昭４６２３５３
２）されている。The dust-proofing measures shown in Fig. 5 have already been proposed (Japanese Patent Publication No. 462353).
2) It has been done.
第５図中２１は防塵プーリーに設けた起風翼片、２２は
ファンケースに設けた起風室である。In FIG. 5, reference numeral 21 denotes an air blower blade provided on the dustproof pulley, and 22 represents an air blower chamber provided on the fan case.
ところがこの場合は形状が複雑な上（こ隙間りの寸法の
量産管理が難しく、隙間りが大きくなると矢印方向の空
気流がなくなりかえって起風翼で、わらくずを引込んで
来る問題がある。However, in this case, the shape is complicated (this is difficult to mass-produce and control the dimensions of the gap, and when the gap becomes large, there is no airflow in the direction of the arrow, and instead the straw debris is drawn in by the wind blowing blades).
これに対し本考案によると、ファンケース１に設けた筒
状フランジ５と、防塵ブーＩＪ −４に設けた２重の筒
状プーリーフランジ１２，１３により急角度で湾曲した
２重構造の迷路を形成したので、わらくず等の侵入を効
果的に防止することができる。In contrast, according to the present invention, a labyrinth with a double structure curved at a steep angle is created by the cylindrical flange 5 provided on the fan case 1 and the double cylindrical pulley flanges 12 and 13 provided on the dustproof boob IJ-4. This structure effectively prevents the intrusion of straw waste and the like.
構造簡単なため製造も容易である。It is easy to manufacture because of its simple structure.
第１図は本考案を適用したエンジンの一部縦断側面図、
第２図は第１図の部分拡大図、第３図は別の実施例を示
すための第２図の一部に対応する縦断面図、第４図は第
３図のＩＶ−ＩＶ断面図、第５図は従来の構造を示す縦
断面部分図である。
１・・・・・・ファンケース、２・・・・・・冷却ファ
ン、３・・・・・・クランク軸、４・・・・・・防塵プ
ーリー ５・・・・・・筒状フランジ、６・・・・・・
空気吸入口、７・・・・・・始動ブーＩＪ−１１・・・
・・・防塵網付窓孔、１２，１３・・・・・・プーリー
フランジ、１４，１７・・・・・・隙間。Figure 1 is a partial longitudinal side view of an engine to which the present invention is applied;
FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 is a vertical sectional view corresponding to a part of FIG. 2 to show another embodiment, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. , FIG. 5 is a partial vertical cross-sectional view showing a conventional structure. 1... Fan case, 2... Cooling fan, 3... Crankshaft, 4... Dust-proof pulley 5... Cylindrical flange, 6...
Air intake port, 7... Starting boob IJ-11...
...Window hole with dustproof screen, 12, 13...Pulley flange, 14, 17...Gap.
Claims (1)
却ファンの前面を空気吸入口を有するファンケースで覆
い、ファンケースの空気吸入方向に向う筒状フランジを
設け、冷却ファンに固設した始動プーリーに防塵網付窓
孔を有する防塵プーリーを取付け、防塵プーリ一本体に
、回転軸方向外周縁に上記筒状フランジを外側と内側か
ら小隙間を隔てて覆う２重筒状のプーリーフランジを設
け、この外側フランジに回転軸方向に切欠を付したこと
を特徴とするエンジンの防塵装置。In general-purpose air-cooled engines, the front surface of the cooling fan fixed to the end of the crankshaft is covered by a fan case with an air intake port, and a cylindrical flange facing the air intake direction of the fan case is provided, and the starting pulley fixed to the cooling fan is dust-proof. A dustproof pulley with a mesh window hole is installed, and a double cylindrical pulley flange is provided on the outer periphery of the dustproof pulley in the direction of the rotation axis to cover the cylindrical flange from the outside and the inside with a small gap, and this outside An engine dustproof device characterized by having a flange with a notch in the direction of the rotation axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4467677U JPS5842576Y2 (en) | 1977-04-08 | 1977-04-08 | Engine dust control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4467677U JPS5842576Y2 (en) | 1977-04-08 | 1977-04-08 | Engine dust control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53139434U JPS53139434U (en) | 1978-11-04 |
| JPS5842576Y2 true JPS5842576Y2 (en) | 1983-09-27 |
Family
ID=28921457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4467677U Expired JPS5842576Y2 (en) | 1977-04-08 | 1977-04-08 | Engine dust control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5842576Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5862125U (en) * | 1981-10-20 | 1983-04-26 | ヤンマーディーゼル株式会社 | Cooling air intake device for air-cooled internal combustion engines |
| JP5462818B2 (en) * | 2011-03-01 | 2014-04-02 | 株式会社クボタ | Air-cooled engine |
-
1977
- 1977-04-08 JP JP4467677U patent/JPS5842576Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53139434U (en) | 1978-11-04 |
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