JPS6241906A - Cam shaft mechanism of engine - Google Patents

Cam shaft mechanism of engine

Info

Publication number
JPS6241906A
JPS6241906A JP18084985A JP18084985A JPS6241906A JP S6241906 A JPS6241906 A JP S6241906A JP 18084985 A JP18084985 A JP 18084985A JP 18084985 A JP18084985 A JP 18084985A JP S6241906 A JPS6241906 A JP S6241906A
Authority
JP
Japan
Prior art keywords
cam
camshaft
pulley
cam shaft
engine
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.)
Pending
Application number
JP18084985A
Other languages
Japanese (ja)
Inventor
Toshihiko Takada
敏彦 高田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP18084985A priority Critical patent/JPS6241906A/en
Publication of JPS6241906A publication Critical patent/JPS6241906A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To strengthen the connection of a cam shaft and a cam pulley by inserting a pulley supporting member into a center hole of the cam shaft up to a bearing portion of the cam shaft in said connection. CONSTITUTION:When a cam shaft 3 provided with cam 4 is coupled with a pulley 1, the cam shaft 3 is coupled with the pulley 1 by fixedly fitting an end piece 5 fixed to the pulley 1 into the cam shaft 3. The end piece 5 is extended to the interior of a shaft support 7 of the cam shaft 3. Thus, the weight of th cam pulley 1 is not concentrated on and end of the cam shaft support so that the overall strength of the cam shaft is increased.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、エンジンの吸気バルブおよび排気バルブを開
閉させるカムシャフト機構の改良に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a camshaft mechanism for opening and closing intake and exhaust valves of an engine.

(従来技術) 従来から、カムシャフト機構は、エンジンのクランク軸
の回転をタイミングベルトを介して受けて回転されるカ
ムプーリと、エンジンの吸気バルブと排気バルブとをそ
れぞれ開閉さけるカムが固定された円筒状のカムシャフ
トと、一端局面が上記カムプーリの軸に固定され、他端
周面が上記力ムシャフ1〜の内周部に嵌合固定されたブ
ーり支持部祠としてのエンドピース(プーリボス取付部
材)と、上記力ムシャフ1〜を回転自在に軸支するカム
軸受とから構成されている。
(Prior Art) Conventionally, a camshaft mechanism has a cam pulley that is rotated by receiving the rotation of the engine's crankshaft via a timing belt, and a cylinder that has fixed cams that open and close the engine's intake and exhaust valves, respectively. An end piece (pulley boss mounting member) having a shaped camshaft, one end surface fixed to the shaft of the cam pulley, and the other end circumferential surface fitted and fixed to the inner circumference of the force shaft 1. ) and a cam bearing that rotatably supports the force shafts 1 to 1.

ところで、−1−記エンドピースのカムシャフト内周部
への嵌合固定は、上記カムシャフトの外周面が上記軸受
【づと接する位置よりも手前側(すなわちプーリ側)ま
でエンドピースの内端を挿入しているのみである。この
ため、従来機構ではプーリが駆動されてエンドピースを
介してカムシャフトが回転されると、カムプーリに加わ
る荷重がプーリ支持部を介して全て力ムシャフ1−の上
記内周部の手前側にかかり、この部分に応力集中が発生
し、亀裂・破損が生じることがあった。
By the way, the fitting and fixing of the end piece described in -1- to the inner circumferential part of the camshaft is performed by extending the inner end of the end piece to the front side (i.e., the pulley side) of the position where the outer circumferential surface of the camshaft contacts the bearing. It only inserts . Therefore, in the conventional mechanism, when the pulley is driven and the camshaft is rotated via the end piece, the load applied to the cam pulley is entirely applied to the front side of the inner circumference of the force shaft 1- through the pulley support. , stress concentration occurred in this part, which could lead to cracks and damage.

(発明の目的) 本発明は上記従来問題点に鑑みてなされたもので、カム
シャフトの一部への応力集中を防ぎ、カムシャフトの強
度を増大させたエンジンのカムシャフト機構を提供する
ことを目的とする。
(Object of the Invention) The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a camshaft mechanism for an engine that prevents stress concentration on a part of the camshaft and increases the strength of the camshaft. purpose.

(発明の構成) 本発明は、クランク軸と連動されたカムプーリに一端が
固定されたプーリ支持部材の他端を円筒状のカムシャフ
トの内周部に嵌合固定し、かつ上記力ムシャフ1〜をカ
ム軸受にて回転自在に軸支してなるエンジンのカムシャ
フト機構において、上記力ムシ17フト内周部へ嵌合さ
れた上記プーリ支持部材の内端を、−L配カムシャフ1
〜外周面が」二記カム軸受と接するカムシャツ1〜の内
周部位置まで延長したものである。
(Structure of the Invention) The present invention has one end fixed to a cam pulley interlocked with a crankshaft, and the other end of the pulley support member fixed to the inner peripheral part of a cylindrical camshaft, and the above-mentioned force shafts 1- In an engine camshaft mechanism in which a shaft is rotatably supported by a cam bearing, the inner end of the pulley support member fitted to the inner peripheral part of the force shaft 17 is connected to the -L camshaft 1.
The outer circumferential surface extends to the inner circumferential position of the cam shirt 1, where the outer circumferential surface contacts the cam bearing.

この構成により、カムシャフトの軸支部分の一部に応力
が集中することは回避され、カムシャフトの補強がなさ
れる。
With this configuration, concentration of stress on a portion of the shaft portion of the camshaft is avoided, and the camshaft is reinforced.

(実施例) 図面は本発明の一実施例構成を示し、1はカムプーリで
あり、エンジンのクランク軸(図示せず)の回転をタイ
ミングベルト(チェーンでもよい)2を介して受(プて
回転駆動されるものである。3はカムシャツ]・て゛あ
り、円筒形状(バイブ状)であって、外周面にエンジン
シリンダの吸気バルブ(図示せず)とIJI気バルブ(
図示せず)とをそれぞれ開開さけるカム4(1つだけ図
示)が固定されている。5は本発明の特徴であるプーリ
支持部材としてのエンドピースであり、その一端周面が
カムプーリ1の軸1aに固定され、その他端周面(内端
)がカムシャツ1−3に嵌合固定される。6はカムシャ
フト3を回転自在に軸支するベアリング4【どで構成さ
れ/、: ノJム軸受、7はこのカム軸受6が設けられ
たカムシャツ1−ケースである。8はオ”イルシールピ
ースであり、9はオイルシールである。上記オイルシー
ル9は、オイルシールピース8とカムシャツ1〜ケース
7との間に挿入され、固定されている。なお、上記エン
ドピース5とカムシャ71〜3とオイルシールピース8
どはろう付ゼ りあるいは焼付りにより一体化形成されている。
(Embodiment) The drawing shows the configuration of an embodiment of the present invention, in which 1 is a cam pulley, which receives the rotation of the engine crankshaft (not shown) through a timing belt (a chain may also be used) 2. 3 is a cam shirt] and has a cylindrical shape (vibe shape), and has an engine cylinder intake valve (not shown) and an IJI air valve (
Cams 4 (only one is shown) are fixed to open and open the cams (not shown). Reference numeral 5 designates an end piece serving as a pulley support member, which is a feature of the present invention, one end circumferential surface of which is fixed to the shaft 1a of the cam pulley 1, and the other end circumferential surface (inner end) is fitted and fixed to the cam shirt 1-3. Ru. 6 is a bearing 4 which rotatably supports the camshaft 3; 7 is a case of the cam shirt 1 in which the cam bearing 6 is provided. 8 is an oil seal piece, and 9 is an oil seal. The oil seal 9 is inserted and fixed between the oil seal piece 8 and the cam shirt 1 to the case 7. 5 and Kamsha 71-3 and oil seal piece 8
The parts are integrally formed by brazing or baking.

特に本発明ではエンドピース5の上記他端周面(内端)
が、カムシャフト3の外周面がカム軸受6と接するカム
シャツ1〜3の内周部3aの位置まで延長して嵌合、固
定されている点に特徴を右M゛る。このように構成した
ことにより、カムプーリ1に加わる荷重がエンドピース
5を介してカムシャフト3にかかつてもこの応力はカム
シャツ1〜3のカム軸受6の一部分に集中することがな
くなり、したがって、カムシャフト3の全体的な強度が
従来のものと比し、増大する。
In particular, in the present invention, the other end circumferential surface (inner end) of the end piece 5
However, the feature is that the outer circumferential surface of the camshaft 3 extends to the position of the inner circumferential portion 3a of the cam shirts 1 to 3 where it contacts the cam bearing 6, and is fitted and fixed. With this configuration, even if the load applied to the cam pulley 1 is applied to the camshaft 3 via the end piece 5, this stress will not be concentrated on a portion of the cam bearings 6 of the cam shirts 1 to 3, and therefore the cam The overall strength of the shaft 3 is increased compared to conventional shafts.

すなわち、エンドピース5の内端を、仮に図面において
、破線へで示す位置にとどめていたとすると、この破線
へで示す位置の外周部であって、カムシャフト3の対応
部分に、応力が集中して亀裂が発生し易いが、本発明の
ように構成することにより、このような応力の集中は回
避でき、カムシャフト3の亀裂や破損が生じることを防
止できる。
In other words, if the inner end of the end piece 5 were to remain at the position indicated by the broken line in the drawing, stress would be concentrated on the corresponding portion of the camshaft 3 on the outer periphery of the position indicated by the broken line. However, by configuring the camshaft 3 as in the present invention, such concentration of stress can be avoided, and the camshaft 3 can be prevented from being cracked or damaged.

(発明の効果) 以上のように本発明によれば、プーリ支持部材を、カム
シャフトの外周面がカム軸受と接する力ムシャフ1〜の
内周部まで延長して嵌合固定したことにより、カムプー
リの重量がカムシャツ1〜の軸支部の一部に集中してか
かることがなくなり、したがってカムシャツ1への全体
的4丁強度が増大し、耐久性の向−にや良ズテ命が図れ
るなどの効果を有する。
(Effects of the Invention) As described above, according to the present invention, the pulley support member is fitted and fixed by extending to the inner circumference of the force shaft 1 where the outer circumferential surface of the camshaft contacts the cam bearing. The weight of the cam shirt 1 is no longer concentrated on a part of the shaft support, and therefore the overall strength of the cam shirt 1 is increased, which improves durability and life span. have an effect.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の一実施例によるエンジンのカムシャフト
8M横の断面図である。 1・・・カムプーリ、3・・・カムシャフト、5・・・
エンドピース(プーリ支持部材)、6・・・カム軸受。
The drawing is a horizontal sectional view of a camshaft 8M of an engine according to an embodiment of the present invention. 1...Cam pulley, 3...Camshaft, 5...
End piece (pulley support member), 6... cam bearing.

Claims (1)

【特許請求の範囲】[Claims] 1、クランク軸と連動されたカムプーリに一端が固定さ
れたプーリ支持部材の他端を円筒状のカムシャフトの内
周部に嵌合固定し、かつ上記カムシャフトをカム軸受に
て回転自在に軸支してなるエンジンのカムシャフト機構
において、上記カムシャフト内周部へ嵌合された上記プ
ーリ支持部材の内端を、上記カムシャフト外周面が上記
カム軸受と接するカムシャフトの内周部位置まで延長し
たことを特徴とするエンジンのカムシャフト機構。
1. One end of the pulley support member is fixed to a cam pulley linked to the crankshaft, and the other end of the pulley support member is fitted and fixed to the inner circumference of a cylindrical camshaft, and the camshaft is rotatably supported by a cam bearing. In the camshaft mechanism of the supporting engine, the inner end of the pulley support member fitted to the inner circumference of the camshaft is brought to a position on the inner circumference of the camshaft where the outer circumference of the camshaft contacts the cam bearing. An engine camshaft mechanism characterized by an elongated structure.
JP18084985A 1985-08-16 1985-08-16 Cam shaft mechanism of engine Pending JPS6241906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18084985A JPS6241906A (en) 1985-08-16 1985-08-16 Cam shaft mechanism of engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18084985A JPS6241906A (en) 1985-08-16 1985-08-16 Cam shaft mechanism of engine

Publications (1)

Publication Number Publication Date
JPS6241906A true JPS6241906A (en) 1987-02-23

Family

ID=16090432

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18084985A Pending JPS6241906A (en) 1985-08-16 1985-08-16 Cam shaft mechanism of engine

Country Status (1)

Country Link
JP (1) JPS6241906A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6444278U (en) * 1987-09-11 1989-03-16
JP2012007614A (en) * 2010-06-23 2012-01-12 Mahle Internatl Gmbh Camshaft and combustion engine
JP2019167886A (en) * 2018-03-23 2019-10-03 株式会社Subaru Cam shaft

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6444278U (en) * 1987-09-11 1989-03-16
JP2012007614A (en) * 2010-06-23 2012-01-12 Mahle Internatl Gmbh Camshaft and combustion engine
JP2019167886A (en) * 2018-03-23 2019-10-03 株式会社Subaru Cam shaft

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