JPS62336B2 - - Google Patents
Info
- Publication number
- JPS62336B2 JPS62336B2 JP12504482A JP12504482A JPS62336B2 JP S62336 B2 JPS62336 B2 JP S62336B2 JP 12504482 A JP12504482 A JP 12504482A JP 12504482 A JP12504482 A JP 12504482A JP S62336 B2 JPS62336 B2 JP S62336B2
- Authority
- JP
- Japan
- Prior art keywords
- gear
- input shaft
- storage chamber
- lower wall
- 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
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 15
- 230000004308 accommodation Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
Classifications
-
- 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
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
-
- 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
- F02B2075/1816—Number of cylinders four
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Transmissions (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】
本発明は、クランク軸を収容するクランクケー
スからその側方の変速ギア機構を収容するミツシ
ヨンケースの上方に傾斜姿勢でのびるシリンダブ
ロツクを備える車両用エンジンに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle engine that includes a cylinder block that extends in an inclined position from a crankcase that accommodates a crankshaft to above a transmission case that accommodates a transmission gear mechanism on the side thereof.
従来、例えば自動２輪車に搭載するエンジンと
して、１対のシリンダブロツクを車体の前後方向
にＶ字状に配置したＶ型エンジンは知られ、この
もので後側のシリンダブロツクはクランクケース
からその後方のミツシヨンケース上に傾斜姿勢に
のび、該シリンダブロツクに形成するカムチエー
ンの収容室が該ミツシヨンケース内の変速ギア機
構の配置部上方に位置する場合、該収容室と該変
速ギア機構との間隙がクランク軸に連結される該
機構の入力軸上のギアの部分において最も狭めら
れるため、両者の干渉を生じないよう該入力軸を
該収容室から離間させる必要があるが、この場合
その離間巾を広くとるとエンジンが大型化し、そ
こで離間巾を可及的に狭めて且つ干渉を生じない
ようにすることが望まれる。 Conventionally, V-type engines have been known as engines installed in motorcycles, for example, in which a pair of cylinder blocks are arranged in a V-shape in the longitudinal direction of the vehicle body. When the housing chamber of the cam chain is extended in an inclined position on one transmission case and is formed in the cylinder block and is located above the arrangement part of the transmission gear mechanism in the transmission case, the housing chamber and the transmission gear mechanism are connected to each other. Since the gap is narrowest at the gear part on the input shaft of the mechanism connected to the crankshaft, it is necessary to separate the input shaft from the housing chamber to prevent interference between the two. If the separation width is made wide, the engine becomes large-sized, so it is desirable to make the separation width as narrow as possible and to prevent interference from occurring.
本発明は、かかる要望を満すエンジンを提供す
ることをその目的とするもので、クランク軸を収
容するクランクケースからその側方のミツシヨン
ケースの上方に傾斜姿勢にのびるシリンダブロツ
クを備える車両用エンジンであつて、該シリンダ
ブロツクは、該ミツシヨンケース内の変速ギア機
構の配置部上方に位置するカムチエーンの収容室
を備えるものにおいて、該クランクシヤフトに連
結される該変速ギア機構の入力軸上の複数のギア
のうち最高速段のギアを該収容室の直下部側方に
離間配置し、該入力軸と該収容室の下側壁との間
隙を該最高速ギアの外径より狭く設定したことを
特徴とする。 An object of the present invention is to provide an engine that satisfies such demands, and includes a cylinder block for a vehicle that extends in an inclined position from a crankcase that accommodates a crankshaft to above a transmission case on the side thereof. In the engine, the cylinder block is provided with a housing chamber for a cam chain located above the arrangement part of the transmission gear mechanism in the transmission case, and the cylinder block is arranged on the input shaft of the transmission gear mechanism connected to the crankshaft. The highest speed gear among the plurality of gears is arranged at a distance to the side directly below the storage chamber, and the gap between the input shaft and the lower wall of the storage chamber is set narrower than the outer diameter of the highest speed gear. It is characterized by
次いで本発明を図示の実施例につき説明する。
第１図乃至第３図は自動２輪車の車体Ａに搭載す
るＶ型４気筒エンジンＢに本発明を適用した実施
例を示し、該エンジンＢは、クランクケース１上
に車体Ａの前後方向にＶ字状に配置された前後１
対のシリンダブロツク２−１，２−２を備え、該
各シリンダブロツク２−１，２−２は、第２図及
び第３図に明示する如く左右両側の１対のシリン
ダ３，３と、該シリンダブロツク２−１，２−２
の頂部のシリンダヘツド４内の吸気用と排気用の
カム軸５，５と該クランクケース１内のクランク
軸６とを連結するカムチエーン７を収容する中間
の収容室８とを備える２シリンダ型に構成され、
該クランク軸６には、その中間部に該各シリンダ
ブロツク２−１，２−２の該各収容室８の配置位
置に対応して該カムチエーン７を各掛渡す１対の
チエーンスプロケツト９−１，９−２を隣接配置
した。 The invention will now be explained with reference to illustrated embodiments.
1 to 3 show an embodiment in which the present invention is applied to a V-type 4-cylinder engine B mounted on a body A of a two-wheeled motor vehicle. Front and rear 1 arranged in a V-shape
It is equipped with a pair of cylinder blocks 2-1, 2-2, and each cylinder block 2-1, 2-2 has a pair of left and right cylinders 3, 3, as shown in FIGS. 2 and 3. The cylinder blocks 2-1, 2-2
It is a two-cylinder type with an intermediate storage chamber 8 that accommodates a cam chain 7 that connects the intake and exhaust camshafts 5, 5 in the cylinder head 4 at the top of the cylinder and the crankshaft 6 in the crankcase 1. configured,
The crankshaft 6 has a pair of chain sprockets 9- at its intermediate portion that span the cam chains 7 in correspondence with the arrangement positions of the accommodation chambers 8 of the respective cylinder blocks 2-1, 2-2. 1 and 9-2 were placed adjacent to each other.
ここで後側のシリンダブロツク２−２は、該ク
ランクケース１からその後方のミツシヨンケース
１０の上方に傾斜姿勢にのびることとなり、該シ
リンダブロツク２−２の左右方向中間の該収容室
８は、該ミツシヨンケース１０内の左右方向中間
の変速ギア機構１１の上方に配置されることとな
る。 Here, the rear cylinder block 2-2 extends from the crankcase 1 in an inclined position above the transmission case 10 at the rear thereof, and the storage chamber 8 in the middle of the cylinder block 2-2 in the left-right direction is , is disposed above the transmission gear mechanism 11 in the middle of the transmission case 10 in the left-right direction.
該変速ギア機構１１は、クランク軸６にクラツ
チ１２を介して連結される前側の入力軸１３と、
これに並行の後側の出力軸１４との間に複数段例
えば６段ギア列を備えるもので、該入力軸１３上
には、最低速段の１速ギアＧ１から最高速段の６
段ギアＧ６までの径の異る６個のギアが配置され
ており、第３図のＬ−１乃至Ｌ−６で示す各ライ
ンにより各速のギア列が確立されるようになつて
いる。尚、図示のもので１速ギアＧ１は精密鍜造
により入力軸１３と一体成形されている。ここで
従来のものでは、第５図に示す如く入力軸１３に
その左側から４速―６速―３速―２速―５速―１
速の順にギアを配列するを一般とし、この場合後
側のシリンダブロツク２−２の収容室８の直下部
には４速ギアＧ４が配置されるが、該収容室８の
下側壁８ａは４速ギアＧ４と６速ギアＧ６との配
置部周面に対向する平坦壁に形成されて、該下側
壁８ａに対し該入力軸１３は該６速ギアＧ６の外
径以上の間隙を存して設けられる。 The speed change gear mechanism 11 includes a front input shaft 13 connected to the crankshaft 6 via a clutch 12;
A plurality of stages, for example, a 6-stage gear train is provided between this and the output shaft 14 on the rear side parallel to this.
Six gears with different diameters up to stage gear G6 are arranged, and a gear train for each speed is established by each line indicated by L-1 to L-6 in FIG. In the illustrated embodiment, the first speed gear G1 is integrally molded with the input shaft 13 by precision forging. Here, in the conventional system, as shown in FIG.
Generally speaking, the gears are arranged in order of speed, and in this case, a 4-speed gear G4 is arranged directly below the housing chamber 8 of the rear cylinder block 2-2, but the lower wall 8a of the housing chamber 8 is The input shaft 13 is formed on a flat wall facing the circumferential surface of the arrangement portion of the speed gear G4 and the sixth speed gear G6, and the input shaft 13 has a gap larger than the outer diameter of the sixth speed gear G6 with respect to the lower wall 8a. provided.
この場合、下側壁８ａを第５図点線示の如く６
速ギアＧ６の周面に対向する部分において上方に
オフセツトして、該６速ギアＧ６をこのオフセツ
ト部に凹入することにより該下側壁８ａと該入力
軸１３との間隙を該６速ギアＧ６の外径より狭く
設定することが可能であるが、第５図示のもので
は６速ギアＧ６が該収容室８の直下部に近接し過
ぎて、このままでは該オフセツト部を形成すると
カムチエーン７やチエーンガイド７ａとの干渉を
生ずる。 In this case, the lower wall 8a is 6
The gap between the lower wall 8a and the input shaft 13 is reduced by upwardly offsetting the portion facing the circumferential surface of the speed gear G6 and recessing the sixth speed gear G6 into this offset portion. However, in the case shown in Fig. 5, the 6th speed gear G6 is too close to just below the storage chamber 8, and if the offset portion is formed as it is, it will damage the cam chain 7 and the chain. This causes interference with the guide 7a.
そこで上記実施例では、第３図に示す如く入力
軸１３にその左側から５速―４速―３速―２速―
６速―１速の順でギアを配列し、収容室８の直下
部に４速ギアＧ４が配置されて、最高速段の６速
ギアＧ６と更に次段の５速ギアＧ５とが該直下部
の両側方に離間配置されるようにし、該収容室８
の下側壁８ａ両側の該６速ギアＧ６や該５速ギア
Ｇ５の周面に対向するシリンダブロツク壁を上方
にオフセツトして、該下側壁８ａと該入力軸１３
との間隙を該下側壁８ａと該４速ギアＧ４との干
渉を生じない範囲で該第６ギアＧ６の外径より狭
く設定した。 Therefore, in the above embodiment, as shown in FIG.
The gears are arranged in the order of 6th gear and 1st gear, and the 4th gear G4 is arranged directly below the storage chamber 8, and the highest speed 6th gear G6 and the next 5th gear G5 are arranged directly below the storage chamber 8. The storage chambers 8
The cylinder block walls facing the circumferential surfaces of the 6th speed gear G6 and the 5th speed gear G5 on both sides of the lower wall 8a are offset upward to connect the lower wall 8a and the input shaft 13.
The gap between the lower wall 8a and the fourth gear G4 is set narrower than the outer diameter of the sixth gear G6 within a range that does not cause interference between the lower wall 8a and the fourth gear G4.
以上Ｖ型４気筒エンジンに本発明を適用した実
施例について説明したが、これに限るものではな
く例えばＶ型２気筒エンジンにも適用可能であ
り、第４図にこの場合の実施例を示す。 Although the embodiment in which the present invention is applied to a V-type four-cylinder engine has been described above, the present invention is not limited thereto, and can also be applied to, for example, a V-type two-cylinder engine, and FIG. 4 shows an embodiment in this case.
尚、このものでは入力軸１３にその左側から２
速―６速―３速―４速―５速―１速の順でギアを
配列し、６速ギアG6と３速ギアＧ３との間隔を
広くとつて、収容室８の直下部に該３速ギアＧ３
と、該直下部の左側方に離間されて該６速ギアＧ
６とが配置されるようにし、該収容室８の下側壁
８ａの左側部を上方にオフセツトして、このオフ
セツト部に該６速ギアＧ６を凹入し、かくて該下
側壁８ａと該入力軸１３との間隙を該６速ギアＧ
６の外径以下に狭めるものとした。 In this case, the input shaft 13 has two
The gears are arranged in the order of speed - 6th gear - 3rd gear - 4th gear - 5th gear - 1st gear, with a wide gap between the 6th gear G6 and the 3rd gear G3, and the 3rd gear is placed directly below the storage chamber 8. Speed gear G3
and the 6th gear G is spaced apart to the left of the lower part.
6 is arranged, and the left side of the lower wall 8a of the storage chamber 8 is offset upward, and the 6th speed gear G6 is recessed into this offset part, so that the lower wall 8a and the input The gap between the shaft 13 and the 6th gear G
It was decided to narrow the diameter to less than the outer diameter of 6.
この様に本発明によるときは、変速ギア機構の
入力軸上のギアのうち最も大径の最高速段のギア
を収容室の直下部側方に離間配置して、該収容室
の下側壁と該入力軸との間隙を該最高速段ギアの
外径より狭く設定するもので、エンジンを可及的
にコンパクト化出来る効果を有する。 As described above, according to the present invention, the gear having the largest diameter and the highest speed among the gears on the input shaft of the transmission gear mechanism is spaced apart from the side directly below the storage chamber, and is connected to the lower wall of the storage chamber. The gap with the input shaft is set narrower than the outer diameter of the highest speed gear, which has the effect of making the engine as compact as possible.
第１図は本発明エンジンの１例を搭載した自動
２輪車の側面図、第２図はその要部の拡大截断側
面図、第３図は第２図の―線截断面図、第４
図は他の実施列の截断面図、第５図は従来例の截
断面図である。
１……クランクケース、２−１，２−２……シ
リンダブロツク、７……カムチエーン、８……収
容室、８ａ……下側壁、１０……ミツシヨンケー
ス、１１……変速ギア機構、１３……入力軸、Ｇ
１…Ｇ６……ギア。
Fig. 1 is a side view of a motorcycle equipped with an example of the engine of the present invention, Fig. 2 is an enlarged cross-sectional side view of its main parts, Fig. 3 is a cross-sectional view taken along the line - - of Fig. 2, and Fig. 4
The figure is a cross-sectional view of another embodiment, and FIG. 5 is a cross-sectional view of a conventional example. DESCRIPTION OF SYMBOLS 1... Crank case, 2-1, 2-2... Cylinder block, 7... Cam chain, 8... Accommodation chamber, 8a... Lower wall, 10... Mission case, 11... Speed change gear mechanism, 13 ...Input shaft, G
1...G6...gear.
Claims (1)
の側方のミツシヨンケースの上方に傾斜姿勢にの
びるシリンダブロツクを備える車両用エンジンで
あつて、該シリンダブロツクは、該ミツシヨンケ
ース内の変速ギア機構の配置部上方に位置するカ
ムチエーンの収容室を備えるものにおいて、該ク
ランクシヤフトに連結される該変速ギア機構の入
力軸上の複数のギアのうち最高速段のギアを該収
容室の直下部側方に離間配置し、該入力軸と該収
容室の下側壁との間隙を該最高速ギアの外径より
狭く設定したことを特徴とする車両用エンジン。1. A vehicle engine equipped with a cylinder block extending in an inclined position from a crankcase housing a crankshaft to above a transmission case on the side thereof, the cylinder block having an arrangement of a transmission gear mechanism within the transmission case. A cam chain storage chamber located above the cam chain, wherein the highest speed gear among the plurality of gears on the input shaft of the transmission gear mechanism connected to the crankshaft is located directly below and to the side of the storage chamber. A vehicle engine, characterized in that the input shaft and the lower wall of the storage chamber are spaced apart from each other, and the gap between the input shaft and the lower wall of the storage chamber is set to be narrower than the outer diameter of the highest speed gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12504482A JPS5915632A (en) | 1982-07-20 | 1982-07-20 | vehicle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12504482A JPS5915632A (en) | 1982-07-20 | 1982-07-20 | vehicle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5915632A JPS5915632A (en) | 1984-01-26 |
| JPS62336B2 true JPS62336B2 (en) | 1987-01-07 |
Family
ID=14900441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12504482A Granted JPS5915632A (en) | 1982-07-20 | 1982-07-20 | vehicle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5915632A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6069251A (en) * | 1983-09-26 | 1985-04-19 | Yamaha Motor Co Ltd | Crankcase for multi-cylinder engine |
-
1982
- 1982-07-20 JP JP12504482A patent/JPS5915632A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5915632A (en) | 1984-01-26 |
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