JP2507374Y2 - Engine cover mounting structure - Google Patents
Engine cover mounting structureInfo
- Publication number
- JP2507374Y2 JP2507374Y2 JP1990112122U JP11212290U JP2507374Y2 JP 2507374 Y2 JP2507374 Y2 JP 2507374Y2 JP 1990112122 U JP1990112122 U JP 1990112122U JP 11212290 U JP11212290 U JP 11212290U JP 2507374 Y2 JP2507374 Y2 JP 2507374Y2
- Authority
- JP
- Japan
- Prior art keywords
- cover
- muffler
- muffler cover
- engine
- cylinder
- 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 - Fee Related
Links
Landscapes
- Exhaust Silencers (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は小型エンジン用エンジンカバーの取付構造に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an engine cover mounting structure for a small engine.
第５〜９図に示す従来例によって説明すると、第５図
は一部欠如した正面図でシュラウド１はシュラウド締付
ビス4,5によって取付けられ、マフラカバー２は係合片
６および嵌合部７とによって前記シュラウド１に接続さ
れている。また、マフラカバー２は、下端のネジ止め部
８をビス３によってエンジン本体のクランクケース部に
取り付けている。９はシュラウド１に設けたリブ、10は
該リブ９を係止する係止部、11はスパークプラグキャッ
プ、12はスパークプラグ、13はマフラ、14はシリンダで
ある。第５図のＡ−Ａ断面を示す第６図においてシュラ
ウド１のマフラカバー側に設けたリブ９の端部に係合片
６が突設されており、これがマフラカバー２の嵌合部７
に嵌合するように構成され、かつリブ９の終端部がマフ
ラカバー２の係止部10に係止されるようになってマフラ
カバーの端部はリブ９に沿って嵌めこまれる。第６図の
Ｐ矢視図を第７図に、Ｂ−Ｂ断面を第８図に、Ｃ−Ｃ断
面を第９図に示す。Describing the conventional example shown in FIGS. 5 to 9, FIG. 5 is a front view with a part missing, and the shroud 1 is attached by the shroud tightening screws 4,5, and the muffler cover 2 is an engaging piece 6 and a fitting portion. 7 and is connected to the shroud 1. Further, the muffler cover 2 has a screw fixing portion 8 at the lower end attached to the crankcase portion of the engine body with a screw 3. Reference numeral 9 is a rib provided on the shroud 1, 10 is a locking portion for locking the rib 9, 11 is a spark plug cap, 12 is a spark plug, 13 is a muffler, and 14 is a cylinder. In FIG. 6 showing the AA cross section of FIG. 5, an engaging piece 6 is projected from the end of a rib 9 provided on the muffler cover side of the shroud 1, and this is a fitting portion 7 of the muffler cover 2.
The rib 9 has an end portion which is engaged with the engaging portion 10 of the muffler cover 2 so that the end portion of the muffler cover is fitted along the rib 9. FIG. 7 is a view taken in the direction of arrow P of FIG. 6, a BB cross section is shown in FIG. 8, and a CC cross section is shown in FIG.
次に第10〜11図に他の従来例を示す。 Next, other conventional examples are shown in FIGS.
第10図はエンジンカバーをシュラウド１とマフラカバ
ー２とに分解した状態を示す斜視図である。シュラウド
１には上面中央部にネジ止め部15を有し、マフラカバー
２の下端にはネジ止め部８がある。シュラウド１には係
合片６がマフラカバー取り付け側にあり、マフラカバー
２には該係合片６の嵌合部７が設けられている。第11図
はシュラウド１およびマフラカバー２の取り付け状況を
示す凹断面図で、シュラウド１をシュラウド締付ビス５
によって固定した後、マフラカバー２を係合片６と嵌合
部７との嵌合により取り付け、最後にネジ止め部８を本
体にビス３によって止める。FIG. 10 is a perspective view showing a state in which the engine cover is disassembled into the shroud 1 and the muffler cover 2. The shroud 1 has a screwing portion 15 at the center of the upper surface thereof, and the muffler cover 2 has a screwing portion 8 at the lower end thereof. The shroud 1 has an engagement piece 6 on the muffler cover mounting side, and the muffler cover 2 is provided with a fitting portion 7 of the engagement piece 6. FIG. 11 is a concave cross-sectional view showing how the shroud 1 and the muffler cover 2 are attached.
After fixing by, the muffler cover 2 is attached by fitting the engaging piece 6 and the fitting portion 7, and finally the screw fixing portion 8 is fixed to the main body by the screw 3.
しかしながら、前記従来例の場合は、構成部品の製作
上シュラウド１の係止片並びに係止部とこれに嵌合する
マフラカバー２の嵌合部との寸法関係には隙間が存在す
る。このためエンジンの運転時に発生する振動によって
ガタが発生し、これがカバーの間でビビリ音を発生さ
せ、エンジンの騒音が大きくなるという問題点がある。However, in the case of the above-mentioned conventional example, there is a gap in the dimensional relationship between the locking piece and the locking portion of the shroud 1 and the fitting portion of the muffler cover 2 fitted to the locking piece in manufacturing the component parts. For this reason, there is a problem in that vibration generated during operation of the engine causes rattling, which causes chatter noise between the covers, resulting in increased engine noise.
本考案は前記問題点を解決するもので、その目的は部
品点数が少なく簡単な構造でビビリ音の発生が無く低騒
音のエンジンを提供するにある。SUMMARY OF THE INVENTION The present invention solves the above problems, and an object thereof is to provide an engine with a small number of parts and a simple structure that does not generate chatter noise and has low noise.
本考案に係るエンジンカバーの取付構造は、マフラカ
バーの上部をシリンダカバーに取付けるとともに、該マ
フラカバーの下部をクランクケースに取付けるように構
成された小型エンジンにおいて、前記シリンダカバー
に、前記マフラカバーの上部嵌合部に設けられた爪が係
合される引掛け部をその内面側に設けて、前記爪と引掛
け部とを前記シリンダカバーで覆うとともに、前記シリ
ンダカバーに前記マフラカバーの端面の内面が嵌合する
リブを設け、前記マフラカバーの上部嵌合部をシリンダ
カバーに嵌合したとき、マフラカバーの下部の締付面と
クランクケースの締付面との間に所定の間隙が形成され
てなることを特徴とする。The engine cover mounting structure according to the present invention is a small engine configured such that the upper portion of the muffler cover is attached to the cylinder cover and the lower portion of the muffler cover is attached to the crankcase. A hooking part with which a claw provided in the upper fitting part is engaged is provided on the inner surface side thereof, and the claw and the catching part are covered with the cylinder cover, and the cylinder cover covers the end surface of the muffler cover. A rib that fits the inner surface is provided, and when the upper fitting part of the muffler cover is fitted to the cylinder cover, a predetermined gap is formed between the lower tightening surface of the muffler cover and the tightening surface of the crankcase. It is characterized by being done.
マフラカバーの下部を変形させる様にしてシリンダカ
バーに締付け固定することにより、シリンダカバーとマ
フラカバーの嵌合部は相互に押し付けられるように嵌合
し、エンジンの振動により嵌合部にガタが形成されるこ
とが無く、ビビリ音の発生が防止される。また、マフラ
カバーとシリンダカバーとの係合部がシリンダカバーに
よって覆われているので、凹凸のないスマートな外観形
状となる。By fixing the lower part of the muffler cover to the cylinder cover by tightening it, the fitting parts of the cylinder cover and the muffler cover are pressed against each other, and the vibration of the engine creates play in the fitting part. And the occurrence of chattering noise is prevented. In addition, since the engaging portion between the muffler cover and the cylinder cover is covered by the cylinder cover, the appearance is smart without any unevenness.
〔実施例〕 本考案の１実施例を第１図〜第４図により説明する。[Embodiment] An embodiment of the present invention will be described with reference to FIGS.
第１図はエンジンの出力軸側より見た外観図を示す。
図において30はシリンダカバー、31はマフラカバー、3
2,33はそれぞれシリンダカバー30、マフラカバー31をエ
ンジン本体に締付固定するためのスクリューである。34
はシリンダ、35はクランクケース、36は燃料タンク、37
は点火プラグキャップ、38はエアクリーナ、39は気化器
である。FIG. 1 shows an external view as seen from the output shaft side of the engine.
In the figure, 30 is a cylinder cover, 31 is a muffler cover, 3
Reference numerals 2 and 33 are screws for tightening and fixing the cylinder cover 30 and the muffler cover 31 to the engine body. 34
Is a cylinder, 35 is a crankcase, 36 is a fuel tank, 37
Is a spark plug cap, 38 is an air cleaner, and 39 is a carburetor.
第２図〜第４図に本考案の要旨となる部分を示す。図
においてシリンダカバー30は、その嵌合部30dをクラン
クケース35に左右両側から嵌合するとともに、シリンダ
34の頂面にてネジ32によりシリンダ34に固定されてい
る。前記シリンダカバー30には、マフラカバー31の爪31
aが係合する引掛け部30aが設けられ、又前記係合部近傍
の剛性向上のため、マフラカバー31の端面31bの内面が
嵌合するリブ30bが設けられている。また、シリンダカ
バー30の冷却風の排風側下部には、マフラカバー31の嵌
合溝30cが設けられている。31cはマフラカバー31の嵌合
部、31dはマフラカバー31の締付座、31eは締付面、35a
はクランクケースの締付座、35bは締付面であり、双方
の締付面31e及び35bが対向して設けられている。41はマ
フラカバー31取付用のビスである。2 to 4 show a part which is the gist of the present invention. In the figure, the cylinder cover 30 has its fitting portion 30d fitted to the crankcase 35 from both left and right sides, and
It is fixed to the cylinder 34 by screws 32 at the top surface of 34. The cylinder cover 30 has a claw 31 of a muffler cover 31.
A hook portion 30a with which a is engaged is provided, and a rib 30b with which the inner surface of the end surface 31b of the muffler cover 31 is fitted is provided in order to improve the rigidity in the vicinity of the engagement portion. Further, a fitting groove 30c of the muffler cover 31 is provided on the lower side of the cylinder cover 30 on the side where the cooling air is discharged. 31c is a fitting portion of the muffler cover 31, 31d is a fastening seat of the muffler cover 31, 31e is a fastening surface, and 35a is
Is a tightening seat of the crankcase, and 35b is a tightening surface, and both tightening surfaces 31e and 35b are provided so as to face each other. 41 is a screw for mounting the muffler cover 31.
前記の構成をそなえたエンジンにおいて、シリンダカ
バー30にマフラカバー31を組み付ける際には、第２図に
示すように、シリンダカバー30上部の引掛け部30a並び
にリブ30b部にマフラカバー31の嵌合部31a,31cを挿入し
てセットした場合、マフラカバー下部の締付座31dの締
付面31eとクランクケース35のマフラカバー締付座面35b
との間に適当な寸法ｌが確保される様になっている。こ
れにより、クランクケース35へマフラカバー31をビス41
により締付けた時、マフラカバー31の爪部31aとカバー
の端面部31b間にてカバー部が変形し相互の嵌合部が押
し付けられる様に接合される。従ってシリンダカバー30
とマフラカバー31とは接合部にガタがなく嵌合する。よ
って、エンジン運転時の振動による嵌合部からのビビリ
音の発生を防止することができる。また、シリンダカバ
ー30上部の引掛け部30aとマフラカバー31上部の爪31aと
の係合部をシリンダカバー30で覆うようにして、外観上
凹凸の少ないスマートな形状としている。In the engine having the above configuration, when the muffler cover 31 is assembled to the cylinder cover 30, as shown in FIG. 2, the muffler cover 31 is fitted to the hook portion 30a and the rib 30b on the upper portion of the cylinder cover 30. When the parts 31a and 31c are inserted and set, the tightening surface 31e of the tightening seat 31d at the bottom of the muffler cover and the muffler cover tightening seat surface 35b of the crankcase 35.
A suitable dimension 1 is ensured between and. As a result, the muffler cover 31 is screwed into the crankcase 35.
When tightened by, the cover portion is deformed between the claw portion 31a of the muffler cover 31 and the end surface portion 31b of the cover so that the fitting portions are pressed against each other. Therefore, the cylinder cover 30
The muffler cover 31 and the muffler cover 31 fit together without play. Therefore, it is possible to prevent chattering noise from being generated from the fitting portion due to vibration during engine operation. Further, the engagement portion between the hooking portion 30a on the upper portion of the cylinder cover 30 and the claw 31a on the upper portion of the muffler cover 31 is covered with the cylinder cover 30 so as to have a smart shape with little unevenness in appearance.
本考案は前記のように構成されているので、次の効果
が得られる。シリンダカバーとマフラカバーとを、双方
の上部において各々嵌合部を挿入セットした際に、マフ
ラカバー下部の締付座面31eとクランクケースの締付座
面35bとの間に適当寸法ｌを設けることにより、双方を
互いに締付けた時マフラカバーが変形し、各々の嵌合部
が押し付けられるように接合する。このためエンジン運
転時の振動により各嵌合部のガタの発生はなくビビリ音
を生じない。これによりエンジンの低騒音化が可能とな
り、従来のもののように締付ネジの数を多くする等の対
応が不必要となり締付スクリューも少なくなってコスト
低減も可能となる。また、マフラカバーとシリンダカバ
ーとの係合部がシリンダカバーで覆われているので、エ
ンジンカバー取付部を外観上凹凸の少ないスマートな形
状とすることができる。Since the present invention is configured as described above, the following effects can be obtained. When the cylinder cover and the muffler cover are inserted and set in the upper parts of both, an appropriate dimension 1 is provided between the tightening seat surface 31e of the lower part of the muffler cover and the tightening seat surface 35b of the crankcase. As a result, the muffler covers are deformed when they are fastened to each other, and the fitting portions are joined so as to be pressed against each other. For this reason, rattling noise does not occur at each fitting portion due to vibration during engine operation, and chattering noise does not occur. As a result, it is possible to reduce the noise of the engine, and it becomes unnecessary to take measures such as increasing the number of tightening screws as in the conventional one, and the number of tightening screws is reduced, so that the cost can be reduced. Further, since the engagement portion between the muffler cover and the cylinder cover is covered with the cylinder cover, the engine cover mounting portion can be formed in a smart shape with less unevenness in appearance.
第１図は、考案の第１実施例に係るエンジンの外観正面
図、第２図は部分説明用正面図、第３図はシリンダカバ
ーのマフラ側より見た図、第４図はシリンダカバーとマ
フラカバーの嵌合要領説明用斜視図、第５〜11図は、従
来の構造を示す部分外観図である。 30……シリンダカバー、31……マフラカバー、35……ク
ランクケース、30a……シリンダカバーの引掛け部、30b
……リブ、31a……マフラカバーの爪、31e……マフラカ
バーの締付座面、35a……クランクケースネジ座面。FIG. 1 is an external front view of an engine according to a first embodiment of the invention, FIG. 2 is a partial front view of the engine, FIG. 3 is a view seen from a muffler side of a cylinder cover, and FIG. 4 is a cylinder cover. A perspective view for explaining the fitting procedure of the muffler cover and FIGS. 5 to 11 are partial external views showing a conventional structure. 30 …… Cylinder cover, 31 …… Muffler cover, 35 …… Crankcase, 30a …… Cylinder cover hooking part, 30b
...... Rib, 31a …… Muffler cover claw, 31e …… Muffler cover tightening seat surface, 35a …… Crankcase screw seat surface.
Claims (1)
付けるとともに、該マフラカバーの下部をクランクケー
スに取付けるように構成された小型エンジンにおいて、
前記シリンダカバーに、前記マフラカバーの上部嵌合部
に設けられた爪が係合される引掛け部をその内面側に設
けて、前記爪と引掛け部とを前記シリンダカバーで覆う
とともに、前記シリンダカバーに前記マフラカバーの端
面の内面が嵌合するリブを設け、前記マフラカバーの上
部嵌合部をシリンダカバーに嵌合したとき、マフラカバ
ーの下部の締付面とクランクケースの締付面との間に所
定の間隙が形成されてなることを特徴とするエンジンカ
バーの取付構造。1. A small engine configured such that an upper portion of a muffler cover is attached to a cylinder cover and a lower portion of the muffler cover is attached to a crankcase,
The cylinder cover is provided on its inner surface side with a hook portion to which a claw provided in an upper fitting portion of the muffler cover is engaged, and the claw and the hook portion are covered with the cylinder cover. The cylinder cover is provided with a rib to which the inner surface of the end surface of the muffler cover is fitted, and when the upper fitting part of the muffler cover is fitted to the cylinder cover, the tightening surface of the lower part of the muffler cover and the tightening surface of the crankcase An engine cover mounting structure characterized in that a predetermined gap is formed between the engine cover and the engine cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990112122U JP2507374Y2 (en) | 1990-10-29 | 1990-10-29 | Engine cover mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990112122U JP2507374Y2 (en) | 1990-10-29 | 1990-10-29 | Engine cover mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0469648U JPH0469648U (en) | 1992-06-19 |
| JP2507374Y2 true JP2507374Y2 (en) | 1996-08-14 |
Family
ID=31859625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990112122U Expired - Fee Related JP2507374Y2 (en) | 1990-10-29 | 1990-10-29 | Engine cover mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507374Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004081386A1 (en) * | 2003-03-13 | 2004-09-23 | Yanmar Co., Ltd. | Cover structure for engine |
| JP4213971B2 (en) * | 2003-03-13 | 2009-01-28 | ヤンマー株式会社 | Sound insulation cover structure for air-cooled engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0521624Y2 (en) * | 1987-05-20 | 1993-06-03 |
-
1990
- 1990-10-29 JP JP1990112122U patent/JP2507374Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0469648U (en) | 1992-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |