JPH0212300B2 - - Google Patents
Info
- Publication number
- JPH0212300B2 JPH0212300B2 JP12879382A JP12879382A JPH0212300B2 JP H0212300 B2 JPH0212300 B2 JP H0212300B2 JP 12879382 A JP12879382 A JP 12879382A JP 12879382 A JP12879382 A JP 12879382A JP H0212300 B2 JPH0212300 B2 JP H0212300B2
- Authority
- JP
- Japan
- Prior art keywords
- chain
- guide
- timing chain
- tension side
- chain guide
- 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
- 239000000463 material Substances 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/18—Means for guiding or supporting belts, ropes, or chains
-
- 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
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
-
- 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
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1808—Number of cylinders two
-
- 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
- F02B2275/18—DOHC [Double overhead camshaft]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0808—Extension coil springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0872—Sliding members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/18—Means for guiding or supporting belts, ropes, or chains
- F16H2007/185—Means for guiding or supporting belts, ropes, or chains the guiding surface in contact with the belt, rope or chain having particular shapes, structures or materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【発明の詳細な説明】
本発明は、例えば４サイクル内燃機関のクラン
ク軸と動弁カム軸間に懸回されて該動弁カム軸を
調時回転するための無端状タイミングチエンの張
り側を所定の経時に沿つて走行するように案内す
るチエンガイドに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tension side of an endless timing chain suspended between a crankshaft and a valve camshaft of a four-stroke internal combustion engine, for example, to rotate the valve camshaft in time. This invention relates to a chain guide that guides the user to travel along a predetermined time course.
従来この種のチエンガイドは鋼製の心板にラバ
ーを焼付け等により一体結合して構成されてお
り、その主体部分が金属材であるための重量増を
招き、また結合部の接合強度を十分に高める必要
があつた。 Conventionally, this type of chain guide has been constructed by integrally bonding rubber to a steel core plate by baking or other means, which results in an increase in weight due to the main body being made of metal, and also requires sufficient joint strength at the joint. There was a need to increase it.
そこで本発明はチエンの張り側の外面に対して
進退可能な帯状のチエンガイド全体を合成樹脂材
により一体成形し、そのチエンの張り側外面に対
面するガイド面の少なくとも一部を幅方向に沿う
凹曲面に形成してチエンガイドの大幅な軽量化と
強度増を図り、前記従来のものの不都合を解決
し、併せてチエンを自動的にチエンガイド本体の
幅方向中央部に誘導して抵抗少なく軽快、円滑に
チエンの張り側を案内できるようにした、構成簡
単なチエンガイドを提供することを主な目的とす
るものである。 Therefore, in the present invention, the entire band-shaped chain guide that can move forward and backward with respect to the outer surface of the tension side of the chain is integrally molded from a synthetic resin material, and at least a part of the guide surface facing the outer surface of the tension side of the chain is formed along the width direction. The chain guide is formed into a concave curved surface to significantly reduce its weight and increase its strength, solving the disadvantages of the conventional ones, and also automatically guides the chain to the center of the chain guide body in the width direction, making it light with less resistance. The main purpose of this invention is to provide a chain guide with a simple structure that can smoothly guide the tension side of the chain.
以下、図面により本発明装置をＶ型多気筒内燃
機関に実施した場合の一実施例について説明す
る。 EMBODIMENT OF THE INVENTION Hereinafter, an embodiment in which the present invention is applied to a V-type multi-cylinder internal combustion engine will be described with reference to the drawings.
内燃機関は２つのエンジンブロツクB1，B2が
互いにＶ型に配置され、それらのエンジンブロツ
クB1，B2の各中心線L1−L1，L2−L2の交叉点上
に共通のクランク軸１が配置され、このクランク
軸１は第１図において時計方向に回転される。 In an internal combustion engine, two engine blocks B 1 and B 2 are arranged in a V-shape, and a common engine is located at the intersection of center lines L 1 -L 1 and L 2 -L 2 of these engine blocks B 1 and B 2 . A crankshaft 1 is arranged, and this crankshaft 1 is rotated clockwise in FIG.
エンジンブロツクB1，B2の内部構造は全く同
一であるので、以下エンジンブロツクB1内の構
造について詳細に説明する。 Since the internal structures of engine blocks B 1 and B 2 are exactly the same, the structure inside engine block B 1 will be described in detail below.
エンジンブロツクB1は通常のようにシリンダ
ブロツク２にシリンダヘツド３を重合固着し、さ
らにシリンダヘツド３上にヘツドカバー４が被着
される。 In the engine block B1 , a cylinder head 3 is polymerized and fixed to a cylinder block 2 in the usual manner, and a head cover 4 is further mounted on the cylinder head 3.
シリンダヘツド３には中心線L1−L1の左右に
対称的に、しかもクランク軸１と平行に吸、排気
用の一対の動弁カム軸５，６が回転自在に支承さ
れ、これらの動弁カム軸５，６に吸、排気弁７，
８の開閉用カム９，１０が一体に設けられる。 A pair of valve drive camshafts 5 and 6 for intake and exhaust are rotatably supported on the cylinder head 3 symmetrically to the left and right of the center line L1 - L1 and parallel to the crankshaft 1. Suction and exhaust valves 7,
Eight opening/closing cams 9, 10 are integrally provided.
クランク軸１には、駆動スプロケツト１１が固
着され、また一対のカム軸５，６には、それぞれ
被動スプロケツト１３，１４が固着され、これら
の駆動スプロケツト１１および被動スプロケツト
１３，１４間には無端状のタイミングチエン１５
が懸回され、クランク軸１の回転は、駆動スプロ
ケツト１１よりタイミングチエン１５および被動
スプロケツト１３，１４を介して動弁カム軸５，
６に伝達され、吸、排気弁７，８を開閉駆動でき
るようになつている。 A drive sprocket 11 is fixed to the crankshaft 1, and driven sprockets 13 and 14 are fixed to the pair of camshafts 5 and 6, respectively. timing chain 15
The rotation of the crankshaft 1 is transmitted from the drive sprocket 11 to the valve drive camshaft 5, via the timing chain 15 and driven sprockets 13, 14.
6 to open and close the intake and exhaust valves 7 and 8.
尚、タイミングチエン１５としてローラチエン
またはサイレントチエンが使用される。 Note that a roller chain or a silent chain is used as the timing chain 15.
タイミングチエン１５の弛み側の外側には、鉄
板の上にゴム製ガイドを焼付けてなる、弓形のテ
ンシヨナ１６が配置され、そのテンシヨナ１６の
固定端１７はエンジンブロツクB1に支持軸１９
を以て回転自在に支持されており、またその可動
端１８は張力自動調整装置Ａの揺動アーム２１の
先端にピボツトピン２０を以て回動自在に連結さ
れている。 On the outside of the slack side of the timing chain 15, an arcuate tensioner 16, which is made by baking a rubber guide onto a steel plate, is arranged, and the fixed end 17 of the tensioner 16 is attached to the support shaft 19 on the engine block B1.
The movable end 18 is rotatably connected to the tip of a swinging arm 21 of the automatic tension adjustment device A via a pivot pin 20.
前記張力自動調整装置Ａは前記揺動アーム２１
がタイミングチエン１５の伸びに追従して揺動
し、前記テンシヨナ１６を、タイミングチエン１
５に向けて湾曲かつ弾発させ、該チエン１５に一
定の張力を与え、かつタイミングチエン１５に伸
びが発生した場合にもその張力を自動的に一定に
保つように構成されるが本発明の要旨ではないの
で、その詳細な説明は省略する。 The automatic tension adjustment device A includes the swing arm 21
follows the extension of the timing chain 15 and swings, causing the tensioner 16 to move towards the timing chain 1.
The timing chain 15 is curved and springs toward the timing chain 15, and is configured to apply a constant tension to the timing chain 15, and to automatically keep the tension constant even if the timing chain 15 stretches. Since this is not a summary, detailed explanation will be omitted.
タイミングチエン１５の張り側には弓形に形成
された本発明チエンガイド２２が配設される。 On the tension side of the timing chain 15, a chain guide 22 of the present invention, which is formed into an arcuate shape, is arranged.
このチエンガイド２２は、第３〜８図に示すよ
うに、その全体が硬質合成樹脂材により一体成形
して構成されており、その主体部２３はタイミン
グチエン１５に向けて凸の弓形に湾曲した帯状体
により構成され、その背面基部には、軸受ブラケ
ツト２４が一体に突設され、またその背面中央部
には側面三角形状の支持ブラケツト２５が突設さ
れ、さらにその支持ブラケツト２５を挟んでその
長手方向両側にはそれぞれ側面台形をなす抑え片
２６，２７が突設されている。 As shown in FIGS. 3 to 8, this chain guide 22 is constructed by integrally molding the entirety of a hard synthetic resin material, and its main body portion 23 is curved in a convex arc shape toward the timing chain 15. It is composed of a band-shaped body, and a bearing bracket 24 is integrally protruded from the base of its back surface, and a support bracket 25 having a triangular side surface is protruded from the center of its back surface. Retaining pieces 26 and 27 each having a trapezoidal side surface are protruded from both sides in the longitudinal direction.
チエンガイド２２の主体部２３の、タイミング
チエン１５の張り側外面と対面するガイド面２８
は前記軸受ブラケツト２４の部分を除いて横断面
凹状に形成され、またその全長に亘つてその幅方
向に沿う凹曲面２９に形成されている。またチエ
ンガイド２２の主体部２３の長手方向中央部の両
側には、タイミングチエン１５の両側方にのびる
側壁３０が設けられる。 A guide surface 28 of the main body portion 23 of the chain guide 22 facing the tension side outer surface of the timing chain 15
is formed to have a concave cross section except for the portion of the bearing bracket 24, and is formed into a concave curved surface 29 along its width direction over its entire length. Furthermore, side walls 30 extending to both sides of the timing chain 15 are provided on both sides of the longitudinal center portion of the main body portion 23 of the chain guide 22 .
第５〜８図に示すように軸受ブラケツト２４、
支持ブラケツト２５、および抑え片２６，２７は
何れもその幅方向の中央部に中央ウエブWbを有
するとともにその両側に肉抜き凹部Ｒが形成され
ており、チエンガイド２２の成形に際して合成樹
脂材の冷却時の、前記中央ウエブWbの収縮によ
り前記凹曲面２９が自動的に形成され、成形後の
機械加工等の加工を要しない。 As shown in FIGS. 5-8, the bearing bracket 24,
The support bracket 25 and the holding pieces 26 and 27 each have a central web Wb at the center in the width direction, and a hollow recess R is formed on both sides of the web to cool the synthetic resin material during molding of the chain guide 22. The concave curved surface 29 is automatically formed by the contraction of the central web Wb at the time of molding, and there is no need for processing such as machining after molding.
前述のように構成されるチエンガイド２２は、
その軸受ブラケツト２４が枢支軸３２をもつてエ
ンジンブロツクB1に枢支され、この枢支軸３２
を支点としてタイミングチエン１５の張り側外面
に対して進退できるように揺動でき、そのガイド
面２８は前記張り側外面に当接される。また前記
支持ブラケツト２５はエンジンブロツクB1に突
設した横断面凹状の横ずれ防止壁３３に係合さ
れ、チエンガイドの横ずれが防止できるようにな
つている。さらに支持ブラケツト２５両側の抑え
片２６，２７はエンジンブロツクB1に形成した
受圧面３４，３５に当接される。 The chain guide 22 configured as described above is
The bearing bracket 24 is pivotally supported on the engine block B 1 with a pivot shaft 32 .
The timing chain 15 can be pivoted so as to move forward and backward relative to the tension side outer surface of the timing chain 15 using the timing chain 15 as a fulcrum, and its guide surface 28 is brought into contact with the tension side outer surface. Further, the support bracket 25 is engaged with a lateral displacement prevention wall 33 having a concave cross section and protruding from the engine block B1 , so that lateral displacement of the chain guide can be prevented. Furthermore, the holding pieces 26, 27 on both sides of the support bracket 25 are brought into contact with pressure receiving surfaces 34, 35 formed on the engine block B1 .
いま内燃機関が運転されると、クランク軸１は
第１図時計方向に回転され、その回転は駆動スプ
ロケツト１１、タイミングチエン１５および被動
スプロケツト１３，１４を介して吸、排気用カム
軸５，６に伝達され、動弁機構を同調駆動する。
その際テンシヨナ１６は、タイミングチエン１５
の弛み側に弾発圧接してタイミングチエン１５に
所定の張力を附与する。一方、チエンガイド２２
はタイミングチエン１５の張り側に圧接され、該
張り側の所定の経路に沿つて走行できるように案
内する。そしてその場合チエンガイド２２のガイ
ド面２８に形成される幅方向の凹曲面２９はタイ
ミングチエン１５の張り側をチエンガイド２２の
幅方向中央部に自動的に誘導して該張り側を抵抗
少なく円滑に案内する。 When the internal combustion engine is operated, the crankshaft 1 is rotated clockwise in FIG. The signal is transmitted to the valve train and drives the valve mechanism in synchronization.
At that time, the tensioner 16 is the timing chain 15.
A predetermined tension is applied to the timing chain 15 by elastic pressure contact with the slack side of the timing chain 15. On the other hand, chain guide 22
is pressed against the tension side of the timing chain 15, and guides the timing chain 15 so that it can travel along a predetermined route on the tension side. In that case, the concave curved surface 29 in the width direction formed on the guide surface 28 of the chain guide 22 automatically guides the tension side of the timing chain 15 to the center part in the width direction of the chain guide 22 to smoothly move the tension side with less resistance. I will guide you to.
尚、上記実施例ではチエンガイド２２の長さ方
向全域に亘つてガイド面２８に幅方向に沿う凹曲
面２９を形成した場合を説明したが、チエンガイ
ド２２の長さ方向の一部に前記凹曲面２９を形成
するようにしてもよい。 In the above embodiment, the guide surface 28 is formed with the concave curved surface 29 extending in the width direction over the entire length of the chain guide 22. A curved surface 29 may also be formed.
以上のように本発明によれば、駆動スプロケツ
トと被動スプロケツト間に懸回される無端状チエ
ンの張り側をガイドする帯状のチエンガイドにお
いて、全体を合成樹脂材により構成し、前記チエ
ンの張り側外面に対面するガイド面の少なくとも
一部を幅方向に沿う凹曲面に形成したので、全体
を軽量に安価に形成することができるとともに従
来のもののように接合部を有せず、合成樹脂材で
形成したにも拘らず高い強度が得られる。またチ
エンは、前記凹曲面によつてチエンガイドの幅方
向中央部に自動的に誘導されて、該チエンガイド
によつて抵抗少なく軽快、円滑に案内走行させる
ことができる。 As described above, according to the present invention, in a belt-shaped chain guide that guides the tension side of an endless chain suspended between a driving sprocket and a driven sprocket, the belt-shaped chain guide is entirely made of a synthetic resin material, and the tension side of the chain is At least a part of the guide surface facing the outer surface is formed into a concave curved surface along the width direction, so the entire structure can be made lightweight and inexpensive, and unlike conventional products, it does not have joints and is made of synthetic resin material. Even though it is formed, high strength can be obtained. Further, the chain is automatically guided to the widthwise center portion of the chain guide by the concave curved surface, and can be guided and guided smoothly and lightly with little resistance.
図面は本発明の一実施例を示すもので、第１図
は本発明装置を装備した内燃機関のカム軸転動部
の正面図、第２図はその平面図、第３図は本発明
チエンガイドの側面図、第４図は第３図−線
断面図、第５図は第３図−線断面図、第６図
は第３図−線断面図、第７図は第３図−
線断面図、第８図は第３図−線断面図であ
る。
１１……駆動スプロケツト、１３，１４……被
動スプロケツト、１５……チエンとしてのタイミ
ングチエン、２２……チエンガイド、２８……ガ
イド面、２９……凹曲面。
The drawings show one embodiment of the present invention; FIG. 1 is a front view of a camshaft rolling part of an internal combustion engine equipped with the device of the present invention, FIG. 2 is a plan view thereof, and FIG. A side view of the guide, FIG. 4 is a sectional view taken along the line of FIG. 3, FIG. 5 is a sectional view taken along the line of FIG. 3, FIG. 6 is a sectional view taken along the line of FIG. 3, and FIG.
A line sectional view, FIG. 8 is a line sectional view taken from FIG. 3. DESCRIPTION OF SYMBOLS 11... Drive sprocket, 13, 14... Driven sprocket, 15... Timing chain as a chain, 22... Chain guide, 28... Guide surface, 29... Concave curved surface.
Claims (1)
回される無端状チエンの張り側をガイドする帯状
のチエンガイドにおいて、全体を合成樹脂材によ
り構成し、前記チエンの張り側外面に対面するガ
イド面の少なくとも一部を幅方向に沿う凹曲面に
形成してなるチエンガイド。1. A belt-shaped chain guide that guides the tension side of an endless chain suspended between a driving sprocket and a driven sprocket, the entirety of which is made of a synthetic resin material, and at least one of the guide surfaces facing the tension side outer surface of the chain. A chain guide whose portion is formed into a concave curved surface along the width direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12879382A JPS5919753A (en) | 1982-07-23 | 1982-07-23 | Chain guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12879382A JPS5919753A (en) | 1982-07-23 | 1982-07-23 | Chain guide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5919753A JPS5919753A (en) | 1984-02-01 |
| JPH0212300B2 true JPH0212300B2 (en) | 1990-03-19 |
Family
ID=14993582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12879382A Granted JPS5919753A (en) | 1982-07-23 | 1982-07-23 | Chain guide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5919753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0563254U (en) * | 1992-02-03 | 1993-08-24 | 株式会社キング製作所 | Container for culturing plants |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6808467B2 (en) * | 2001-05-17 | 2004-10-26 | Borgwarner Inc. | Blade tensioner and system for a chain |
| EP1647739A3 (en) * | 2004-10-12 | 2007-06-27 | BorgWarner Morse TEC Japan K.K. | Chain guide |
-
1982
- 1982-07-23 JP JP12879382A patent/JPS5919753A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0563254U (en) * | 1992-02-03 | 1993-08-24 | 株式会社キング製作所 | Container for culturing plants |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5919753A (en) | 1984-02-01 |
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