JPS588928Y2 - 2-stroke engine crankcase - Google Patents
2-stroke engine crankcaseInfo
- Publication number
- JPS588928Y2 JPS588928Y2 JP986179U JP986179U JPS588928Y2 JP S588928 Y2 JPS588928 Y2 JP S588928Y2 JP 986179 U JP986179 U JP 986179U JP 986179 U JP986179 U JP 986179U JP S588928 Y2 JPS588928 Y2 JP S588928Y2
- Authority
- JP
- Japan
- Prior art keywords
- upper case
- case
- crankshaft
- stroke engine
- crankcase
- 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
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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
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)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【考案の詳細な説明】
この考案は、２サイクルエンジンのクランクケースの改
良（こ関する。[Detailed description of the invention] This invention relates to the improvement of the crankcase of a two-stroke engine.
２サイクルエンジンのクランクケースは、左右１こ分割
できるものと、上下）こ分割できるようにしたものがあ
る。There are two-stroke engine crankcases that can be divided into two parts (left and right), and others which can be divided into two parts (top and bottom).
上下（こ分割できるものは、一般（こ、第１図及び第２
図（こ示すよう（こ、上ケースＡと下ケースＢを、クラ
ンク軸Ｃの芯を境（こ上下１こ部分し、上ケースＡ１こ
シリンダ連結部りを設ける。Upper and lower (Those that can be divided into
As shown in the figure, the upper case A and lower case B are separated by the center of the crankshaft C, and a cylinder connection part is provided in the upper case A1.
そして、上ケースＡと下ケースＢの間（こクランク軸ベ
アリングＥを挾持させ、シリンダ連結部りの後側と前側
で、ポルｌ−Ｆ、Ｇｌこよって上ケースＡと下ケースＢ
を締着する。Then, between the upper case A and the lower case B (the crankshaft bearing E is sandwiched between the upper case A and the lower case B), the upper case A and the lower case B
Tighten.
この場合、クランク軸ベアリングＥとポルｌ−Ｆの距離
１こ対し、クランク軸ベアリングＥとボルトＧの距離が
大きく、締付けがアンバランス（こなって、クランク軸
ベアリングＥがクリープを起す等の不都合が生じる。In this case, the distance between crankshaft bearing E and bolt G is large compared to the distance 1 between crankshaft bearing E and pole l-F, and the tightening is unbalanced (this causes problems such as creep of crankshaft bearing E). occurs.
この考案は、かかる点１こ鑑み改善したもので、以下第
３図及び第４図（こ示す本考案の実施例について説明す
る。This invention has been improved in view of one of the above points, and the embodiment of the invention shown in FIGS. 3 and 4 will be described below.
クランクケースは、クランク軸１を境（こ上ケース２と
下ケース３に分割して設け、上ケースに前傾のシリンダ
連結部４を設ける。The crankcase is provided by dividing the crankshaft 1 into an upper case 2 and a lower case 3, and the upper case is provided with a forward-inclined cylinder connecting portion 4.
上ケース２と下ケース３の合わせ面Ｉこクランク軸１を
回転自在１こ支持したクランク軸ベアリング５を挾持す
る。The mating surface I of the upper case 2 and lower case 3 holds a crankshaft bearing 5 which rotatably supports the crankshaft 1.
而して本考案は、上ケース２のシリンダ連結部４の後方
に縦孔６を設け、シリンダ連結部４内の掃気孔部７に縦
孔８を設ける。Accordingly, in the present invention, a vertical hole 6 is provided behind the cylinder connecting portion 4 of the upper case 2, and a vertical hole 8 is provided in the scavenging hole portion 7 in the cylinder connecting portion 4.
そして、両縦孔６，８（こポルｌ−９，１０を通し、下
ケース３のネジ孔１１．１２１こ螺合して、上ケース２
と下ケース３を締着する。Then, pass through both the vertical holes 6 and 8 (holes 1-9 and 10) and screw them into the screw holes 11 and 121 of the lower case 3.
and tighten lower case 3.
尚、ボルト１０は、頭部を縦孔８の上部の座部１こ埋設
させである。The head of the bolt 10 is embedded in the upper seat part of the vertical hole 8.
作用１こついて説明する。I will explain the first effect.
クランク軸ベアリング５とボルト９及びボルト８の間隔
を等しくすることができて、クランク軸ベアリング５を
前後均一な力で締付けることができ、クランク軸ベアリ
ング５の固定が確実）こできる。The intervals between the crankshaft bearing 5 and the bolts 9 and 8 can be made equal, so that the crankshaft bearing 5 can be tightened with uniform force in the front and rear, and the crankshaft bearing 5 can be securely fixed.
そして、シリンダ連結部４の前側（こ突出部がなく、ク
ランクケースがコンパクト（こなる。There is no protruding part on the front side of the cylinder connecting part 4, and the crankcase is compact.
以上説明したよう（こ、この考案は、クランクケースを
クランク軸の芯を境に上ケースと下ケース１こ分割し、
上ケース）こ前傾のシリンダ連結部を設け、上ケースと
下ケースの合わせ面にクランク軸ヘアリングを挾持させ
、上ケースのシリンダ連結部後方と、シリンダ連結部の
掃気孔部に設けた縦孔１こ通したボルトを下ケースのネ
ジ孔１こ螺着して、上ケースと下ケースを締着するよう
（こしたので、ボルト位置をクランク軸ベアリング（こ
対し対称位置（こでき、均一な力で前後クランク軸ベア
リングを固定することができて、クランク軸ベアリング
の耐久性が向上する。As explained above (this idea is to divide the crankcase into an upper case and a lower case at the center of the crankshaft,
(Upper case) A forward-inclined cylinder connection part is provided, and the crankshaft hair ring is sandwiched between the mating surfaces of the upper case and lower case. Screw the bolt passed through one hole into one screw hole in the lower case to tighten the upper and lower cases. The front and rear crankshaft bearings can be fixed with sufficient force, improving the durability of the crankshaft bearings.
そして、掃気孔部のボルトは埋設すること１こよって、
ガス流れ（こ影響を与えない。Since the bolts in the scavenging holes are buried,
Gas flow (this does not affect the flow.
又、クランクケース前部の突出もなくなってコンパクト
（こなる。Also, the front part of the crankcase no longer protrudes, making it more compact.
尚、多気筒の場合、前部縦孔は、シリンダ連結部内で、
掃気孔部側方の二つのシリンダ間（こ移しても同効であ
る。In addition, in the case of multiple cylinders, the front vertical hole is inside the cylinder connection part,
The same effect can be obtained by moving the air between the two cylinders on the sides of the scavenging hole.
又、同様にして４サイクルエンジンのクランクケース１
こも利用できる。Also, in the same way, the crank case 1 of the 4-stroke engine
This is also available.
第１図及び第２図は従来例を示し第１図は側面図、第２
図は平面図、第３図及び第４図は本考案の一実施例を示
し、第３図は側面図、第４図は平面図である。Figures 1 and 2 show conventional examples; Figure 1 is a side view; Figure 2 is a side view;
The figure is a plan view, FIGS. 3 and 4 show an embodiment of the present invention, FIG. 3 is a side view, and FIG. 4 is a plan view.
Claims (1)
ケース１こ分割し、上ケースに前傾のシリンダ連結部を
設け、上ケースと下ケースの合わせ面（こクランク軸ベ
アリングを挾持させ、上ケースのシリンダ連結部後方と
、シリンダ連結部の掃気孔部１こ設けた縦孔（こ通した
ボルトを下ケースのネジ孔（こ螺着して、上ケースと下
ケースを締着するよう（こしたことを特徴とする２サイ
クルエンジンのクランクケース。The crankcase is separated by the center of the crankshaft (the upper case and the lower case are divided into 1 part, the upper case is provided with a forward-inclined cylinder connection part, and the mating surface of the upper case and lower case (this part holds the crankshaft bearing). At the rear of the cylinder connection part of the upper case and one vertical hole in the scavenging hole of the cylinder connection part. (The crankcase of a two-stroke engine is characterized by its stiffness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP986179U JPS588928Y2 (en) | 1979-01-29 | 1979-01-29 | 2-stroke engine crankcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP986179U JPS588928Y2 (en) | 1979-01-29 | 1979-01-29 | 2-stroke engine crankcase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55110745U JPS55110745U (en) | 1980-08-04 |
| JPS588928Y2 true JPS588928Y2 (en) | 1983-02-17 |
Family
ID=28821400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP986179U Expired JPS588928Y2 (en) | 1979-01-29 | 1979-01-29 | 2-stroke engine crankcase |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS588928Y2 (en) |
-
1979
- 1979-01-29 JP JP986179U patent/JPS588928Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55110745U (en) | 1980-08-04 |
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