JPS6365814B2 - - Google Patents
Info
- Publication number
- JPS6365814B2 JPS6365814B2 JP14674985A JP14674985A JPS6365814B2 JP S6365814 B2 JPS6365814 B2 JP S6365814B2 JP 14674985 A JP14674985 A JP 14674985A JP 14674985 A JP14674985 A JP 14674985A JP S6365814 B2 JPS6365814 B2 JP S6365814B2
- Authority
- JP
- Japan
- Prior art keywords
- crankcase
- side lid
- cylinder
- internal combustion
- tightening
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 238000004880 explosion Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】
本発明は、側ふた式の汎用内燃機関のクランク
ケースの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the crankcase of a side lid type general-purpose internal combustion engine.
側ふた式の汎用内燃機関は、その構造様式から
比較的寿命の短い、しかも軽負荷用のものに限ら
れており、従つて、爆発圧が大きい重負荷用の小
形デイーゼル機関には、クランクケースの開口部
をオイルパン部に設けた、いわゆるメタル胴方式
のクランクケースが用いられ、その場合、その製
造コストは高くなる。 Due to its structure, general-purpose internal combustion engines with side lids have a relatively short lifespan and are limited to light-load applications. Therefore, small diesel engines for heavy-load applications with large explosion pressures do not require a crankcase. A so-called metal body type crankcase is used, in which an opening is provided in the oil pan section, and in that case, the manufacturing cost becomes high.
一方、第１図に示す従来の側ふた式の小形汎用
内燃機関においては、クランク軸４を支持する図
示されていない主軸受を設けた側ふたを、クラン
クケース１の開口部に対し締付ボルト３及び平行
ピン１３により取付けるようになつているが、こ
の内燃機関の爆発行程においては、シリンダ１４
のａで示すシリンダ径の中心ｂの部分が最も大き
な影響を受けることになるが、このクランクケー
ス１では、シリンダ１４の爆発圧を、直接側ふた
に設けた主軸受で受け、しかも側ふた部のクラン
クケース１の開口部が大きいため、シリンダ１４
と接する側ふたは下方へ押し下げられると共に、
クランクケース１側の上部は爆発圧により上方へ
持ち上げられ、その締付部で相対すべりによる大
きな変形が発生すると共に、側ふたの締付ボルト
に大きな負荷がかかり、種々のトラブルが発生す
る。 On the other hand, in the conventional side lid type small general-purpose internal combustion engine shown in FIG. 3 and a parallel pin 13, but during the explosion stroke of this internal combustion engine, the cylinder 14
In this crankcase 1, the explosion pressure of the cylinder 14 is directly received by the main bearing provided on the side lid, and the part at the center b of the cylinder diameter indicated by a is most affected. Since the opening of the crankcase 1 is large, the cylinder 14
The side lid in contact with is pushed down, and
The upper part of the crankcase 1 side is lifted upward by the explosion pressure, causing large deformation at the tightening part due to relative slippage, and a large load is applied to the tightening bolts of the side lid, causing various troubles.
その結果、その側ふた部のすべりによりその内
燃機関の耐久性を著しく低下させると共に、側ふ
た締付部のパツキンからの油洩れや、締付ボルト
３の折損等が発生するばかりでなく、クランク軸
４の傾きや、シリンダ１４の変形によりピストン
の焼付等も発生する。 As a result, the durability of the internal combustion engine is significantly reduced due to the slipping of the side cover, oil leakage from the gasket of the side cover tightening part, breakage of the tightening bolt 3, etc., and the crankshaft 4 and deformation of the cylinder 14 may cause seizure of the piston.
そこで本発明は、上記のごとき、側ふた式の汎
用内燃機関における欠点を解消するためになされ
たものであり、側ふた式でも胴方式と同等の爆発
圧に耐えうるクランクケースを提供することを目
的としたものである。 Therefore, the present invention was made in order to eliminate the above-mentioned drawbacks of the side lid type general-purpose internal combustion engine, and it is an object of the present invention to provide a crankcase that can withstand the same explosion pressure even with the side lid type as the body type. This is the purpose.
即ち、本発明はクランク軸の主軸受の一方をク
ランクケースの開口部に固着した側ふたにより支
持する側ふた式の汎用内燃機関において、該クラ
ンクケースの開口部のシリンダとの上面の締付部
分を補強すると共に、その開口部の上下面のシリ
ンダのほぼ中心上にノツクピンを配設することに
より構成される。 That is, the present invention relates to a side lid-type general-purpose internal combustion engine in which one of the main bearings of the crankshaft is supported by a side lid fixed to an opening of the crankcase, in which the tightening portion of the upper surface of the opening of the crankcase is connected to the cylinder. It is constructed by reinforcing the cylinder and arranging a knock pin approximately at the center of the cylinder on the upper and lower surfaces of the opening.
以下図面を参照して本発明の一実施例を説明す
るが、第２図は本実施例における側ふた式の小形
汎用内燃機関の一部断面の側面図であり、第３図
は第２図のクランクケース１の側ふた締付部を示
す正面図である。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a partially sectional side view of a side lid type small general-purpose internal combustion engine in this embodiment, and FIG. FIG. 3 is a front view showing a side lid tightening portion of the crankcase 1 of FIG.
この内燃機関では、クランク軸４の主軸受７及
び８の一方、即ち、第１図のはずみ車６の反対側
の主軸受７を、クランクケース１の開口部に締付
ボルト３により固着した側ふた２により支持して
おり、クランク軸４のクランクピン部は、連接棒
５によりシリンダ１４内を滑動する図示されてい
ないピストンに連結されている。 In this internal combustion engine, one of the main bearings 7 and 8 of the crankshaft 4, that is, the main bearing 7 on the opposite side of the flywheel 6 in FIG. The crank pin portion of the crankshaft 4 is connected by a connecting rod 5 to a piston (not shown) that slides within a cylinder 14 .
そこで、この機関の爆発行程において、側ふた
２のクランクケース１に対する締付部で最も大き
な影響を受ける場所、即ち、相対すべりを発生す
る個所は側ふた２の上面のシリンダ径ａの中心ｂ
であるので、クランクケース１の中心ｂ−ｂ上に
ノツクピン９を上下に取り付けている。 Therefore, during the explosion stroke of this engine, the location that is most affected by the tightening part of the side cover 2 against the crankcase 1, that is, the location where relative slip occurs, is the center b of the cylinder diameter a on the top surface of the side cover 2.
Therefore, the knock pins 9 are attached vertically on the center bb of the crankcase 1.
このノツクピン９は、クランクケース１と側ふ
た２の爆発行程時のすべり止めとしての拘束力を
増すことになる。 This knock pin 9 increases the binding force to prevent the crankcase 1 and the side cover 2 from slipping during the explosion stroke.
また、上記上面のノツクピン９の左右のシリン
ダ径ａ内に締付ボルト１０を配設し、それらの締
付ボルト１０とノツクピン９の上面のクランクケ
ース１にはそれぞれ補強リブ１２を設けている。 Further, tightening bolts 10 are arranged within the cylinder diameter a on the left and right sides of the knock pin 9 on the upper surface, and reinforcing ribs 12 are provided on the tightening bolts 10 and the crankcase 1 on the upper surface of the knock pin 9, respectively.
なお、上記２個のノツクピン９は、第１図の従
来例における側ふた２の位置決め用の平行ピン１
３の代用となるので、本実施例ではこの平行ピン
１３は設けていないが、このノツクピン９は従来
の平行ピン１３よりもその径及び強度を増大する
ものとする。 Note that the above two knock pins 9 are the parallel pins 1 for positioning the side lid 2 in the conventional example shown in FIG.
3, this parallel pin 13 is not provided in this embodiment, but this knock pin 9 is made larger in diameter and strength than the conventional parallel pin 13.
また、上記締付ボルト１０もまた他の締付ボル
ト３よりもその径を大きくし、締付力を増大する
と共に、疲労強度の高い材質のものを採用し、ボ
ルトの折損や締付トルクの低下等によるトラブル
発生を防止する。 The tightening bolt 10 is also made larger in diameter than the other tightening bolts 3 to increase the tightening force, and is made of a material with high fatigue strength to prevent bolt breakage and tightening torque. Prevent troubles caused by deterioration, etc.
従つて、本発明を、側ふた式の小形汎用機関の
クランクケースに適用すれば、クランクケースの
側ふた締付部分と側ふたとの拘束力及び剛性が増
大し、クランクケースと側ふたとが一体形のもの
と同等の機能をもたらすことができ、従来の側ふ
た式の機関に比べ、クランクケースと側ふたとの
締付部分における相対すべり量は約1/5におさえ
ることができることになる。 Therefore, if the present invention is applied to the crankcase of a side lid-type small general-purpose engine, the binding force and rigidity between the side lid tightening portion of the crankcase and the side lid will increase, and the crankcase and side lid will be tightly connected. It can provide the same functionality as an integrated type, and compared to conventional side lid type engines, the amount of relative slippage between the crankcase and side lid at the tightening part can be reduced to approximately 1/5. .
その結果、本発明を採用することにより、側ふ
た式でもメタル胴式と同等の爆発圧を受けること
ができ、耐久性が著しく向上するので、重負荷用
デイーゼル機関に側ふた式の適用が可能となり、
その機関の製作コスト低減をはかる上でも有効で
ある。 As a result, by adopting the present invention, the side lid type can receive the same explosion pressure as the metal barrel type, and its durability is significantly improved, making it possible to apply the side lid type to heavy-load diesel engines. Then,
It is also effective in reducing the production cost of the engine.
第１図は従来の側ふた式の小形汎用内燃機関の
クランクケースの側ふた締付部を示す正面図、第
２図は本発明の一実施例における側ふた式の小形
汎用内燃機関の一部断面の側面図であり、第３図
は第２図のクランクケースの側ふた締付部を示す
正面図である。
１……クランクケース、２……側ふた、３……
締付ボルト、４……クランク軸、７……主軸受、
９……ノツクピン、１０……締付ボルト、１２…
…補強リブ、１４……シリンダ。
FIG. 1 is a front view showing a side lid tightening part of a crankcase of a conventional side lid type small general-purpose internal combustion engine, and FIG. 2 is a part of a side lid type small general-purpose internal combustion engine according to an embodiment of the present invention. 3 is a sectional side view, and FIG. 3 is a front view showing the side lid tightening portion of the crankcase of FIG. 2. FIG. 1...Crankcase, 2...Side lid, 3...
Tightening bolt, 4...crankshaft, 7...main bearing,
9... Knot pin, 10... Tightening bolt, 12...
...Reinforcement rib, 14...Cylinder.
Claims (1)
の開口部に固着した側ふたにより支持する側ふた
式の汎用内燃機関において、該クランクケースの
開口部のシリンダとの上面の締付部分を補強する
と共に、その開口部の上下面のシリンダのほぼ中
心上にノツクピンを配設したことを特徴とする汎
用内燃機関のクランクケース。1. In a side lid type general-purpose internal combustion engine in which one of the main bearings of the crankshaft is supported by a side lid fixed to the opening of the crankcase, the upper surface of the opening of the crankcase that connects to the cylinder is reinforced, and A crankcase for a general-purpose internal combustion engine, characterized in that a knock pin is disposed approximately at the center of the cylinder on the upper and lower surfaces of the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14674985A JPS6123851A (en) | 1985-07-05 | 1985-07-05 | Crankcase for industrial internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14674985A JPS6123851A (en) | 1985-07-05 | 1985-07-05 | Crankcase for industrial internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6123851A JPS6123851A (en) | 1986-02-01 |
| JPS6365814B2 true JPS6365814B2 (en) | 1988-12-16 |
Family
ID=15414719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14674985A Granted JPS6123851A (en) | 1985-07-05 | 1985-07-05 | Crankcase for industrial internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6123851A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001200754A (en) * | 2000-01-17 | 2001-07-27 | Honda Motor Co Ltd | engine |
-
1985
- 1985-07-05 JP JP14674985A patent/JPS6123851A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6123851A (en) | 1986-02-01 |
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