JPH077569Y2 - Cylinder block structure - Google Patents
Cylinder block structureInfo
- Publication number
- JPH077569Y2 JPH077569Y2 JP5281189U JP5281189U JPH077569Y2 JP H077569 Y2 JPH077569 Y2 JP H077569Y2 JP 5281189 U JP5281189 U JP 5281189U JP 5281189 U JP5281189 U JP 5281189U JP H077569 Y2 JPH077569 Y2 JP H077569Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder block
- casting
- cutting
- inner end
- end surface
- 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 - Lifetime
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、内燃機関のシリンダブロックの構造に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a structure of a cylinder block of an internal combustion engine.
従来、内燃機関のシリンダブロックの壁面部には、実開
昭60-147740号公報に示すように型抜きのための開口部
又は第５図に示すように鋳造用鋳抜孔Ｃが形成されてい
る。2. Description of the Related Art Conventionally, a wall portion of a cylinder block of an internal combustion engine is provided with an opening for die cutting as shown in Japanese Utility Model Laid-Open No. 147740/1985 or a casting hole C for casting as shown in FIG. .
かかる開口部又は鋳造用鋳抜孔Ｃには、盲板又は盲プラ
グを充分な気密性が得られるように取付けるためにその
内面を精密に切削するが、第６図に示すように鋳造用鋳
抜孔Ｃの場合には、切削加工時、特に内側端面部分を切
削する場合に切削した大きなリング状又はコイル状の切
削片ＤがシリンダブロックＥの内側に残こる。In order to attach a blind plate or blind plug to the opening or casting hole C for casting so as to obtain sufficient airtightness, the inner surface of the plate is precisely cut. As shown in FIG. In the case of C, a large ring-shaped or coil-shaped cutting piece D cut during cutting, particularly when cutting the inner end surface portion, remains inside the cylinder block E.
ところで、上記切削片Ｄは、その後取り除かれるが、シ
リンダブロックＥの内側内部の狭い所から引き出すの
で、極めて面倒であった。By the way, the cutting piece D is removed after that, but it is extremely troublesome because it is pulled out from a narrow space inside the cylinder block E.
本考案は上記する問題を解決するためになされたもの
で、その目的は鋳造用鋳抜孔の切削加工によって生ずる
切削片の取り出しを容易にするシリンダブロックの構造
を提供することにある。The present invention has been made to solve the above problems, and an object of the present invention is to provide a structure of a cylinder block that facilitates removal of a cutting piece generated by cutting a casting hole for casting.
上記目的を達成するための本考案の構成は、シリンダブ
ロック本体の壁面部に設けられた鋳造用鋳抜孔を有する
ボス部の内側端面に、半径方向に溝を形成したものであ
る。The structure of the present invention for achieving the above object is to form a groove in the radial direction on the inner end surface of a boss portion having a casting hole formed in the wall surface of a cylinder block body.
鋳造用鋳抜孔を有するボス部の内側端面に、半径方向に
溝を形成すれば、盲プラグを打ち込むための鋳造用鋳抜
孔の切削加工の際、特にボス部の内側端面部を切削加工
する際に、切削片が小さく分断され、そのことにより、
切削片の取り出しが容易になる。When forming a groove in the radial direction on the inner end surface of the boss portion that has the casting hole for casting, when cutting the casting hole for casting to drive a blind plug, especially when cutting the inner end surface portion of the boss portion. In addition, the cutting piece is divided into small pieces, which
The removal of cutting pieces becomes easy.
以下、図面により本考案を詳細に説明する。 Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は、本考案のシリンダブロックの構造の一実施例
を示したものである。FIG. 1 shows an embodiment of the structure of the cylinder block of the present invention.
１は鋳造で形成したシリンダブロック本体で、シリンダ
ブロック本体１には縦方向に複数のシリンダ２が形成さ
れている。そのシリンダブロック本体１の壁面部３に
は、第２図に示すように鋳造用鋳抜孔４を有するボス部
５が設けられている。そして、ボス部５の内側端面６に
は、第２図及び第３図に示すように半径方向に溝７が形
成されたシリンダブロックになっている。尚、上記溝７
の数は、鋳造用鋳抜孔４の大きさ等を考慮して適当な数
を選ぶことが望ましい。Reference numeral 1 denotes a cylinder block body formed by casting, and a plurality of cylinders 2 are formed in the cylinder block body 1 in the vertical direction. As shown in FIG. 2, the wall surface portion 3 of the cylinder block body 1 is provided with a boss portion 5 having a casting hole 4 for casting. The inner end surface 6 of the boss portion 5 is a cylinder block in which a groove 7 is formed in the radial direction as shown in FIGS. 2 and 3. In addition, the groove 7
It is desirable to select an appropriate number in consideration of the size of the casting hole 4 for casting.
かかる構造になっていれば、盲プラグを打ち込むための
鋳造用鋳抜孔４の切削加工の際、特にボス部の内側端面
６を切削加工する際に、切削片がコイル状又はリング状
にならず、第４図に示す如く小さく分断される。従っ
て、ブロー装置の圧縮空気又はバキューム装置の吸引に
よりシリンダブロック本体１内に残った切削片８を、簡
単に取り出すことができる。With such a structure, the cutting piece does not have a coil shape or a ring shape when cutting the casting casting hole 4 for driving the blind plug, particularly when cutting the inner end surface 6 of the boss portion. , As shown in FIG. 4, it is divided into small pieces. Therefore, the cutting pieces 8 remaining in the cylinder block body 1 due to the compressed air of the blower or the suction of the vacuum device can be easily taken out.
以上述べた如く本考案は、鋳造用鋳抜孔を有するボス部
の内側端面に、半径方向に溝を形成したので、ボス部の
内側端面の切削加工の際に切削片は分断され、取り出し
が容易になる。As described above, according to the present invention, since the groove is formed in the inner end surface of the boss portion having the casting hole for casting in the radial direction, the cutting piece is divided during the cutting processing of the inner end surface of the boss portion, and the takeout is easy. become.
第１図は本考案の一実施例の斜視図、第２図は第１図の
A-A拡大断面図、第３図は第２図の背面図、第４図は分
断された切削片の平面図、第５図は従来のシリンダブロ
ックの斜視図、第６図は第５図のB-B拡大断面図であ
る。 １……シリンダブロック本体 ３……壁面部 ４……鋳造用鋳抜孔 ５……ボス部 ６……内側端面 ７……溝。FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of FIG.
AA enlarged sectional view, FIG. 3 is a rear view of FIG. 2, FIG. 4 is a plan view of a cut piece, FIG. 5 is a perspective view of a conventional cylinder block, and FIG. 6 is BB of FIG. It is an expanded sectional view. 1 ... Cylinder block body 3 ... Wall surface part 4 ... Casting hole for casting 5 ... Boss part 6 ... Inner end surface 7 ... Groove
Claims (1)
た鋳造用鋳抜孔を有するボス部の内側端面に、半径方向
に溝を形成したことを特徴とするシリンダブロックの構
造。1. A structure of a cylinder block, characterized in that a groove is formed in a radial direction on an inner end surface of a boss portion having a casting hole formed in a wall surface of a cylinder block body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5281189U JPH077569Y2 (en) | 1989-05-08 | 1989-05-08 | Cylinder block structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5281189U JPH077569Y2 (en) | 1989-05-08 | 1989-05-08 | Cylinder block structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02144639U JPH02144639U (en) | 1990-12-07 |
| JPH077569Y2 true JPH077569Y2 (en) | 1995-02-22 |
Family
ID=31573437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5281189U Expired - Lifetime JPH077569Y2 (en) | 1989-05-08 | 1989-05-08 | Cylinder block structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH077569Y2 (en) |
-
1989
- 1989-05-08 JP JP5281189U patent/JPH077569Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02144639U (en) | 1990-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH077569Y2 (en) | Cylinder block structure | |
| JP3218503B2 (en) | Burner head manufacturing method | |
| JPS5843616Y2 (en) | 2 cycle engine cylinder | |
| JPH0457650U (en) | ||
| JPH0196573U (en) | ||
| JPH01134752U (en) | ||
| JPH0480635U (en) | ||
| JPS5938018Y2 (en) | High frequency coil bobbin | |
| JPS61187943U (en) | ||
| JPS628919Y2 (en) | ||
| JPH0342019U (en) | ||
| JPS6369710U (en) | ||
| JPS63134713U (en) | ||
| JPS6374874U (en) | ||
| JPH0462319U (en) | ||
| JPS62165444U (en) | ||
| JPH03110125U (en) | ||
| JPS5935662U (en) | piston for engine | |
| JPH0325470U (en) | ||
| JPH0434452U (en) | ||
| JPH02118129U (en) | ||
| JPH01166745U (en) | ||
| JPH0212024U (en) | ||
| JPH0197003U (en) | ||
| JPS6455124U (en) |