JPS60531B2 - Engine camshaft bearing structure - Google Patents
Engine camshaft bearing structureInfo
- Publication number
- JPS60531B2 JPS60531B2 JP15922281A JP15922281A JPS60531B2 JP S60531 B2 JPS60531 B2 JP S60531B2 JP 15922281 A JP15922281 A JP 15922281A JP 15922281 A JP15922281 A JP 15922281A JP S60531 B2 JPS60531 B2 JP S60531B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- camshaft
- bearing structure
- cylinder head
- cylinder block
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L1/0532—Camshafts overhead type the cams being directly in contact with the driven valve
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/20—SOHC [Single overhead camshaft]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】
本発明は、シリンダヘッド内にカムシヤフトを配置した
エンジンのカムシャフト軸受構造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 a camshaft bearing structure for an engine in which a camshaft is disposed within a cylinder head.
従来、シリンダブロックに装着されたシリンダヘッド内
に、カムシャフトを２箇所以上で蛇支する軸受を配置し
たエンジンのカムシャフト軸受構造（実関昭５４−５８
５０７号公報）は公知である。Conventionally, an engine camshaft bearing structure (Jitoseki 54-58
No. 507) is publicly known.
ところで、一般にシリンダブロツクはその内部でピスト
ンが往復運動することなどからある程度の強度を必要と
するため、その材質は例えば鋳鉄などからなっており、
またシリンダヘツドは、エンジン自体の軽量化もしくは
放熱性向上のため、その材質は例えばアルミ合金などか
らなっている。しかして上記従来のカムシャフト軸受構
造においては、エンジン運転時に生ずる熱によって上記
両者が互いに長手方向に熱変形しようとする際、上記の
ようにシリンダヘツドがシリンダブロックより一般に熱
膨張率の大きい材質によって形成されているためにシリ
ンダブロックに固着された状態で凸形状に熱変形し、こ
の凸形状の変形によりシリンダヘッドの両端部に設けら
れている軸受がそれぞれ外方向に傾きカムシヤフトの軸
心に対して軸受の軸受孔の軸心がずれ、軸受孔とカムシ
ャフトとが局部接触するようになり偏摩耗を起こす不具
合が生じる。本発明は、上記不具合を解消するものであ
ってシリングヘッド内に設けられたカムシャフトを軸支
する軸受を複数の軸受部と該各軸受部を一体結合する結
合部材とにより形成し、上記軸受を弾性部材を介して上
記シリンダヘツド‘こ支持しシリンダヘッドの熱変形が
上記軸受に伝わるのを弾性部村によって防止することを
目的とするカムシャフト軸受構造を提供するものである
。By the way, cylinder blocks generally require a certain degree of strength due to the reciprocating movement of the piston inside the cylinder block, so the material used for the cylinder block is, for example, cast iron.
Further, the material of the cylinder head is made of, for example, aluminum alloy in order to reduce the weight of the engine itself or improve heat dissipation. However, in the above-mentioned conventional camshaft bearing structure, when the two parts tend to thermally deform each other in the longitudinal direction due to the heat generated during engine operation, the cylinder head is generally made of a material with a higher coefficient of thermal expansion than the cylinder block. Because of this, it is thermally deformed into a convex shape while fixed to the cylinder block, and this deformation causes the bearings provided at both ends of the cylinder head to tilt outward, relative to the axis of the camshaft. This causes the axial center of the bearing hole of the bearing to shift, causing local contact between the bearing hole and the camshaft, resulting in uneven wear. The present invention solves the above-mentioned problems, and includes forming a bearing that pivotally supports a camshaft provided in a shilling head by a plurality of bearing parts and a connecting member that integrally connects each of the bearing parts. A camshaft bearing structure is provided in which the cylinder head is supported through an elastic member, and the elastic member prevents thermal deformation of the cylinder head from being transmitted to the bearing.
以下本発明を図に示す実施例に基づいて詳細に説明する
。The present invention will be explained in detail below based on embodiments shown in the drawings.
第１図及び第２図において、シリンダブロックーよりも
熱膨張率が大きい材質で形成されたシリンダヘッド２内
にカムシャフト３が配置されており、該カムシャフト３
は、複数の、軸受部４ａ，４ａ，４ａと該各軸受部４ａ
，４ａ，４ａを一体結合する結合部材４ｂ，４ｂとによ
り形成した軸受４により軸支されている。In FIGS. 1 and 2, a camshaft 3 is disposed within a cylinder head 2 made of a material with a higher coefficient of thermal expansion than the cylinder block.
is a plurality of bearing parts 4a, 4a, 4a and each bearing part 4a.
, 4a, 4a are integrally connected by a bearing 4 formed by coupling members 4b, 4b.
５は例えばシリコンゴム、アクリルゴム等をガスケット
状或はプレート状に成形した弾性部材であって、該弾性
部材５を介して上記軸受４をシリンダヘッド２に支持す
る。Reference numeral 5 denotes an elastic member made of, for example, silicone rubber, acrylic rubber, or the like into a gasket shape or plate shape, and supports the bearing 4 on the cylinder head 2 via the elastic member 5.
すなわち、上記軸受４、弾性部材５およびシリンダヘッ
ド２を貫通したボルト孔６に円筒状スベーサ７を介して
ボルト８を挿入し、該ボルト８をシリンダブロック１に
綿着することによって軸受４をシリンダヘッド２に弾性
的に支持している。シリンダヘッド２自体は、上記ボル
ト８とは別のボルト９により従来どおりシリンダブロツ
ク１に稀付装着する。That is, a bolt 8 is inserted into a bolt hole 6 passing through the bearing 4, the elastic member 5, and the cylinder head 2 via a cylindrical smoother 7, and the bolt 8 is secured to the cylinder block 1, thereby attaching the bearing 4 to the cylinder block 1. It is elastically supported on the head 2. The cylinder head 2 itself is attached to the cylinder block 1 in the conventional manner using bolts 9 different from the bolts 8 mentioned above.
尚「上記一体結合された軸受４自体の強度を高めるため
に強化鋼をを内蔵することが好ましい。In order to increase the strength of the integrally connected bearing 4 itself, it is preferable to incorporate reinforced steel.
またｔ シリンダヘッドの熱変形にともないバルブクリ
アランスが変化するが、公知の油圧式夕べツト（図示せ
ず）を用いてバルブクリアランスを調節することが好ま
しい。以上説明したように本発明によれば、シＩＪンダ
ヘッドと一体結合された軸受との間に設けられた弾性部
材によって熱膨張を吸収することにより、シーＪンダヘ
ッドの熱変形が一体結合された軸受に伝わることを防ぐ
ことができ、カムシャフトの鞠心と一体結合された軸受
の軸心とはずれることがないのでシリンダヘッド内の軸
受と該軸受によって藤支されるカムシャフトとが局部接
触することなく偏摩耗を確実に防止できる。Also, the valve clearance changes with thermal deformation of the cylinder head, but it is preferable to adjust the valve clearance using a known hydraulic valve (not shown). As explained above, according to the present invention, the thermal deformation of the shear jet head is absorbed by the elastic member provided between the shear jet head and the integrally combined bearing, so that the thermal deformation of the shear jet head is absorbed by the integrally combined bearing. This prevents the bearing in the cylinder head from coming into contact with the camshaft supported by the bearing. Uneven wear can be reliably prevented.
又、簡単な構造で優れた効果を発揮するもので実用的価
値の大きなカムシャフト軸受構造である。In addition, the camshaft bearing structure has a simple structure, exhibits excellent effects, and has great practical value.
第１図は、本発明実施例のシＩＪンダヘッド断面図、第
２図は、第１図のローロ断面図である。
１……シリンダブロツク、２……シリンダヘツド、３…
…カムシャフト、４……軸受、４ａ……軸受部、４ｂ…
…結合部材、５…・・・弾性部材。
第１図第２図FIG. 1 is a sectional view of a cylinder head according to an embodiment of the present invention, and FIG. 2 is a sectional view of the roller of FIG. 1...Cylinder block, 2...Cylinder head, 3...
...Camshaft, 4...Bearing, 4a...Bearing part, 4b...
...Connecting member, 5...Elastic member. Figure 1 Figure 2
Claims (1)
クよりも熱膨張率が大きい材質によって形成されたシリ
ンダヘツド内にカムシヤフトを配置したエンジンにおい
て、上記カムシヤフトを軸支する軸受を複数の軸受部と
該各軸受部を一体結合する結合部材とにより形成すると
ともに、上記軸受を弾性部材を介して上記シリンダヘツ
ドに支持したことを特徴とするエンジンのカムシヤフト
軸受構造。1. In an engine in which a camshaft is disposed within a cylinder head that is attached to a cylinder block and is made of a material with a higher coefficient of thermal expansion than the cylinder block, a bearing that pivotally supports the camshaft is connected to a plurality of bearing parts and each of the bearing parts. 1. A camshaft bearing structure for an engine, characterized in that the camshaft bearing structure is formed by a connecting member that integrally connects the camshaft bearing structure, and the bearing is supported by the cylinder head via an elastic member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15922281A JPS60531B2 (en) | 1981-10-05 | 1981-10-05 | Engine camshaft bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15922281A JPS60531B2 (en) | 1981-10-05 | 1981-10-05 | Engine camshaft bearing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5859306A JPS5859306A (en) | 1983-04-08 |
| JPS60531B2 true JPS60531B2 (en) | 1985-01-08 |
Family
ID=15688998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15922281A Expired JPS60531B2 (en) | 1981-10-05 | 1981-10-05 | Engine camshaft bearing structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60531B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103874830A (en) * | 2011-10-11 | 2014-06-18 | 丰田自动车株式会社 | Camshaft support structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2513328A (en) * | 2013-04-23 | 2014-10-29 | Gm Global Tech Operations Inc | Cylinder head of an internal combustion engine |
-
1981
- 1981-10-05 JP JP15922281A patent/JPS60531B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103874830A (en) * | 2011-10-11 | 2014-06-18 | 丰田自动车株式会社 | Camshaft support structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5859306A (en) | 1983-04-08 |
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