JPS5842575Y2 - Engine dust control device - Google Patents
Engine dust control deviceInfo
- Publication number
- JPS5842575Y2 JPS5842575Y2 JP4467577U JP4467577U JPS5842575Y2 JP S5842575 Y2 JPS5842575 Y2 JP S5842575Y2 JP 4467577 U JP4467577 U JP 4467577U JP 4467577 U JP4467577 U JP 4467577U JP S5842575 Y2 JPS5842575 Y2 JP S5842575Y2
- Authority
- JP
- Japan
- Prior art keywords
- pulley
- flange
- dustproof
- diameter cylindrical
- 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するのでファンカバーの内部へ入り
、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. Since the air is sucked in by the cooling fan, it may enter the inside of the fan cover and come into contact with the engine's hot spots (for example, the cylinder, cylinder head, etc.), causing a fire.
特にコンバインに搭載する場合は、搭載レイアウトの関
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
、エンジン上に落下して来るわらくず及び稲などのはか
ま等も前述の如く冷却空気と共に吸引してエンジン内部
に入り火災を誘発する恐れがある。In particular, when mounted on a combine harvester, the engine is placed near the straw cutter etc. due to the mounting layout, so straw debris and rice grains that fall onto the engine are sucked in together with the cooling air as described above. may enter the engine and cause a fire.
従って冷却空気吸引用の冷却ファンの前方に防塵プーリ
ーを取付け、わらくず等の吸引を極力防ぐ必要がある。Therefore, it is necessary to install a dustproof pulley in front of the cooling fan for sucking cooling air to prevent the suction of straw waste and the like as much as possible.
本考案はエンジンのファンケースにリコイルスタータを
装着するためのりコイル支持ケースを、防塵プーリーと
協働して迷路を形成ししかも迷路を覆う部材として利用
すると共に、防塵プーリーの外周縁に迷路へ侵入しよう
とするわらくず等を切断して外周方向へ跳ね飛ばすため
の山形の切欠を設けたもので、次に図面により説明する
。The present invention utilizes a coil support case for attaching a recoil starter to an engine fan case to form a labyrinth in cooperation with a dustproof pulley, and also as a member to cover the labyrinth. This device is provided with a chevron-shaped notch for cutting and scattering straw waste, etc. that is intended to be removed and thrown away toward the outer circumference.
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はリコイルスタータである。FIG. 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 recoil starter.
第１図の一部を拡大している第２図に於て、ファンケー
ス１は冷却ファン２と同心の空気吸入口５を備え、冷却
ファン２の羽根前面（図の左端面）を覆っている。In FIG. 2, which is a partially enlarged view of FIG. There is.
６はコの字形断面のりコイル支持ケースで、太径筒状フ
ランジ７と小径筒状フランジ８を一体に備え、空気吸入
口５を囲むファンケース１の前面（図の左面）にスペー
サー９を介してリコイルスタータ４と共に複数個のボル
ト１０で締付けである。Reference numeral 6 denotes a glue coil support case with a U-shaped cross section, which is integrally equipped with a large-diameter cylindrical flange 7 and a small-diameter cylindrical flange 8, and is mounted on the front surface (left side in the figure) of the fan case 1 surrounding the air intake port 5 with a spacer 9 interposed therebetween. The recoil starter 4 is then tightened with a plurality of bolts 10.
１１は溶接ナツトである。11 is a welding nut.
ボルト１０はリコイルスタータ４に明けた孔を貫通し、
更にリコイル支持ケース６とファンケース１に明けた孔
を通してナツト１１に螺合し、スペーサー９の両端はり
コイルスタータ４とリコイル支持ケース６の上記ボルト
挿通孔の縁に圧接している。The bolt 10 passes through a hole drilled in the recoil starter 4,
Furthermore, it is screwed into a nut 11 through holes drilled in the recoil support case 6 and the fan case 1, and both ends of the spacer 9 are pressed against the edges of the bolt insertion holes of the coil starter 4 and the recoil support case 6.
１２は始動プーリーで複数個のボルト１３により冷却フ
ァン２のボス部前端面に固定されている。A starting pulley 12 is fixed to the front end surface of the boss portion of the cooling fan 2 with a plurality of bolts 13.
１４は大略、円錐形状をした防塵プーリーで防塵網（メ
タルラス、パンチングメタルを含む）付窓孔１５を備え
、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。Reference numeral 14 is a roughly conical dustproof pulley and is provided with a window hole 15 with a dustproof screen (including metal lath and punched metal) to prevent the passage of straw waste, etc., and to allow only air to pass through.
また中央の筒状フランジ１６が始動プーリー１２に嵌合
してスポット溶接等の手段により固定されている。Further, a central cylindrical flange 16 is fitted onto the starting pulley 12 and fixed thereto by means such as spot welding.
１７はプーリー１４の本体外周縁に設けた筒状のプーリ
ーフランジで、半径方向の僅かな隙間１８を隔てて小径
筒状フランジ８の外側に幅ｌだけ重なり、その先端縁は
りコイル支持ケース６の本体に対し小隙間１９を隔てて
対向し、わらくず等の外部からの侵入に対し迷路を形成
している。Reference numeral 17 denotes a cylindrical pulley flange provided on the outer peripheral edge of the main body of the pulley 14, which overlaps the outside of the small diameter cylindrical flange 8 by a width l with a slight gap 18 in the radial direction. It faces the main body with a small gap 19 in between, forming a labyrinth to prevent intrusion from outside such as straw waste.
大径筒状フランジ７の幅りは、隙間１８，１９等から成
る迷路を覆うように、小径筒状フランジ８の幅より大き
くしである。The width of the large-diameter cylindrical flange 7 is greater than the width of the small-diameter cylindrical flange 8 so as to cover the labyrinth formed by the gaps 18, 19, etc.
プーリーフランジ１γは第３図の如く回転軸方向側にそ
の先端縁２０に間隔を隔てて多数の山形切欠２１を有し
、この切欠２１は上記隙間１９に飛来するわらくずを切
断すると同時に飛散させる機能を発する。As shown in FIG. 3, the pulley flange 1γ has a number of chevron-shaped notches 21 at intervals on its tip edge 20 in the direction of the rotation axis, and these notches 21 cut and at the same time scatter the straw debris flying into the gap 19. Emit function.
図示の切欠２１は防塵プーリー１４の回転方向（矢印Ａ
）側の先端縁２０と直角な直角縁２２と回転方向と反対
側の傾斜縁２３で形成されている。The notch 21 shown is in the rotational direction of the dustproof pulley 14 (arrow A
) is formed by a right-angled edge 22 that is perpendicular to the leading edge 20 and an inclined edge 23 on the opposite side to the rotation direction.
エンジン運転中冷却空気は防塵プーリー１４の防塵網付
窓孔１５から実線矢印の如く吸入され、冷却ファン２に
より加圧されてエンジンのシリンダー、シリンダーヘッ
ド（共に図示せず）等に供給される。During engine operation, cooling air is sucked in from the dust-proof screen window hole 15 of the dust-proof pulley 14 as shown by the solid line arrow, is pressurized by the cooling fan 2, and is supplied to the engine cylinder, cylinder head (both not shown), and the like.
エンジンの上方から落下して来たわらくず等は、大径筒
状フランジ１によりプーリーフランジ１７付近への到達
が阻止されるが、冷却ファン２の吸引力により窓孔１５
を通過する冷却空気と共にプーリーフランジ１７近傍に
浮遊して来たわらくず等は、隙間１９．１８が急角度で
湾曲した迷路を形成しているためそこを容易に通過する
ことができないばかりでなく、プーリーフランジ１７の
切欠２１により切断されると同時に跳ね飛ばされ、隙間
１８への侵入が阻止される。Straw waste, etc. that have fallen from above the engine are prevented from reaching the vicinity of the pulley flange 17 by the large-diameter cylindrical flange 1, but the suction force of the cooling fan 2
Straw waste, etc. floating in the vicinity of the pulley flange 17 along with the cooling air passing through the gap 19.18 not only cannot easily pass through the gap 19, 18 because it forms a labyrinth curved at a steep angle. , is cut by the notch 21 of the pulley flange 17 and is simultaneously thrown away, preventing it from entering the gap 18.
プーリーフランジ１７に設ける切欠としては第４図、第
５図の形状を採用することもできる。The shape of the notch provided in the pulley flange 17 as shown in FIGS. 4 and 5 may also be adopted.
尚この切欠かない場合は前記型なり（１部）の間隙に侵
入したわらくずが堆積して、フランジ１７の回転摩擦で
堆積わらくずが発熱し、発火して火災を起す原因となる
。If this notch is not provided, straw debris that has entered the gap in the mold (part 1) will accumulate, and the accumulated straw debris will generate heat due to the rotational friction of the flange 17, causing ignition and a fire.
従来形状については第６図、第７図の構造で特公昭４７
−７１７５及び特公昭４６−２３５３２の如く既に提案
されているが、第６図中２６はファンケースに固定した
導風板で、導風板２６により防塵ブーＩＪ −２７とフ
ァンケース２８の間ニ実線矢印方向の空気流を発生させ
ようとするものであるが、上記実線の空気流では粉塵は
外部へ放出されず、むしろ外部からのダストが防塵網に
付着堆積して遠心力により破線矢印のように流れてエン
ジン内部に入る問題がある。The conventional shape is the structure shown in Figures 6 and 7.
-7175 and Japanese Patent Publication No. 46-23532, 26 in Fig. 6 is an air guide plate fixed to the fan case, and the air guide plate 26 allows a gap between the dust-proof boo IJ -27 and the fan case 28. This is intended to generate an air flow in the direction of the solid line arrow, but in the air flow shown in the solid line above, dust is not released to the outside. Rather, dust from the outside adheres to the dustproof screen and accumulates, and centrifugal force causes it to flow in the direction of the broken line arrow. There is a problem with the fluid flowing into the engine.
第７図の２９は防塵プーリー３０に設けた起風翼片で、
ファンケース３１との間の隙間に実線矢印方向の空気流
を発生させようとするものである。29 in FIG. 7 is a wind fan blade provided on the dustproof pulley 30,
This is intended to generate airflow in the direction of the solid arrow in the gap between the fan case 31 and the fan case 31.
ところが起風翼片２９や起風室３２等を形成しなければ
ならないため形状が複雑になる事及び、間隙ａが大きく
なると矢印方向の空気流が弱くなりむしろわらくずの侵
入を引き起すため間隙ａの量産寸法管理が困難であり、
例えばプーリー３３の端面（図の右面）を研磨加工する
か又はシム調整が必要となり、生産コスト面で問題があ
る。However, since the wind blowing blades 29, wind blowing chambers 32, etc. must be formed, the shape becomes complicated, and when the gap a becomes large, the air flow in the direction of the arrow becomes weaker, causing straw debris to enter the gap. It is difficult to manage the mass production dimensions of a.
For example, the end face of the pulley 33 (the right side in the figure) needs to be polished or shim adjusted, which poses a problem in terms of production costs.
これに対し本考案によると、リコイル支持ケース６を大
径筒状フランジ７と小径筒状フランジ８を有するコ形断
面にすると共に、防塵プーリー１４の本体外周縁に設け
た筒状のプーリーフランジ１７をフランジ８の外側に僅
かな隙間を隔てて重ね、隙間１８，１９等により急角度
に湾曲した迷路を形成し、更にプーリーフランジ１７に
山形切欠２１を多数設けたため、上記迷路に侵入しよう
とするわらくず等が切欠２１で切断されて、その傾斜縁
２３によＶ積極的に跳ね飛ばされ、迷路内へのわらくず
等の侵入を阻止することができる。In contrast, according to the present invention, the recoil support case 6 has a U-shaped cross section having a large diameter cylindrical flange 7 and a small diameter cylindrical flange 8, and a cylindrical pulley flange 17 provided on the outer periphery of the main body of the dustproof pulley 14. are stacked on the outside of the flange 8 with a slight gap between them, forming a labyrinth curved at a sharp angle through the gaps 18, 19, etc. Furthermore, since a large number of chevron-shaped notches 21 are provided in the pulley flange 17, it is difficult to penetrate into the labyrinth. Straw waste and the like are cut at the notch 21 and are actively thrown away by the inclined edge 23, thereby preventing the straw waste and the like from entering the maze.
又大径筒状フランジ７は上記迷路を覆う庇の役割を果す
ので、落下中のわらくず等がプーリーフランジ１７部分
に到達することを簡単に防止することができる。Furthermore, since the large-diameter cylindrical flange 7 serves as an eaves to cover the labyrinth, it is possible to easily prevent falling straw debris from reaching the pulley flange 17 portion.
その他応用例として、リコイルスタータを装着しない仕
様の場合は、リコイル支持ケース６が不要であるので、
第８図、第９図の如く、筒状フランジ８をファンケース
１と一体成型にし、筒状フランジ７が必要な場合は９図
の如く筒状フランジ７をファンケース１にスポット溶接
等で固定する事も可能である。As another application example, if the recoil starter is not installed, the recoil support case 6 is not required, so
As shown in Figures 8 and 9, the cylindrical flange 8 is integrally molded with the fan case 1, and if the cylindrical flange 7 is required, the cylindrical flange 7 is fixed to the fan case 1 by spot welding or the like as shown in Figure 9. It is also possible to do so.
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図はプーリ一部分の
拡大図、第４図、第５図は別の実施例を示すプーリ一部
分図、第６図、第７図は従来例を示す縦断面部分図であ
る。
第８図、第９図はその他の応用例を示す縦断面図である
。
１・・・・・・ファンケース、２・・・・・・冷却ファ
ン、３・・・・・・クランク軸、５・・・・・・空気吸
入口、６・・・・・・リコイル支持ケース、１・・・・
・・太径筒状フランジ、８・・・・・・小径筒状フラン
ジ、１２・・・・・・始動ブー！、Ｊ−，１４・・・・
・・防塵ノーＩＪ−，１５・・・・・・防塵網付窓孔、
１７・・・・・・プーリーフランジ、１８，１９・・・
・・・隙間、２１・・・・・・山形切欠。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 an enlarged view of a part of the pulley, Figs. 4 and 5 are partial views of the pulley showing another embodiment, and Figs. 6 and 7 are conventional examples. FIG. FIGS. 8 and 9 are longitudinal sectional views showing other application examples. 1...Fan case, 2...Cooling fan, 3...Crankshaft, 5...Air intake port, 6...Recoil support Case 1...
...Large diameter cylindrical flange, 8...Small diameter cylindrical flange, 12...Start boo! , J-, 14...
・・Dustproof no IJ-, 15・・・Window hole with dustproof screen,
17... Pulley flange, 18, 19...
...Gap, 21...Chevron notch.
Claims (1)
口を有するファンケースで覆い、空気吸入口を囲むファ
ンケース前面に小径筒状フランジと太径筒状フランジを
有するコの字形断面のりコイル支持ケースを固定し、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、防塵プーリ一本体の外周縁に
は上記小径筒状フランジ外周部と半径方向の小間隙を確
保させて重なり部を形成する筒状の防塵プーリーのフラ
ンジを設け、プーリーフランジの回転軸方向側先端に多
数の山形切欠を設けたことを特徴とするエンジンの防塵
装置。The front surface of the cooling fan, which is fixed to the width of the crankshaft, is covered by a fan case with an air intake port, and the U-shaped cross-section adhesive coil with a small diameter cylindrical flange and a large diameter cylindrical flange is supported on the front surface of the fan case surrounding the air intake port. Fix the case and attach a dustproof pulley with a window hole with a dustproof mesh to the starting pulley fixed to the cooling fan, ensuring a small gap in the radial direction at the outer periphery of the dustproof pulley body and the outer periphery of the small diameter cylindrical flange. A dustproof device for an engine, characterized in that a flange of a cylindrical dustproof pulley is provided to form an overlapping part, and a number of chevron-shaped notches are provided at the tip of the pulley flange in the direction of the rotation axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4467577U JPS5842575Y2 (en) | 1977-04-08 | 1977-04-08 | Engine dust control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4467577U JPS5842575Y2 (en) | 1977-04-08 | 1977-04-08 | Engine dust control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53139433U JPS53139433U (en) | 1978-11-04 |
| JPS5842575Y2 true JPS5842575Y2 (en) | 1983-09-27 |
Family
ID=28921453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4467577U Expired JPS5842575Y2 (en) | 1977-04-08 | 1977-04-08 | Engine dust control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5842575Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6133219Y2 (en) * | 1981-06-10 | 1986-09-29 | ||
| JPS5867928U (en) * | 1981-10-30 | 1983-05-09 | ヤンマーディーゼル株式会社 | Cooling air intake device for air-cooled internal combustion engines |
-
1977
- 1977-04-08 JP JP4467577U patent/JPS5842575Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53139433U (en) | 1978-11-04 |
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