JPH04279721A

JPH04279721A - Motorcycle

Info

Publication number: JPH04279721A
Application number: JP6761291A
Authority: JP
Inventors: Mitsukane Takebe; 光兼武部; Hisashi Sakae; 寒河江　寿
Original assignee: Yamaha Motor Co Ltd
Current assignee: Yamaha Motor Co Ltd
Priority date: 1991-03-08
Filing date: 1991-03-08
Publication date: 1992-10-05
Anticipated expiration: 2015-10-30
Also published as: JP3104209B2

Abstract

PURPOSE:To protect the installing part of an exhaust pipe and the exhaust pipe itself effectively from a damage, in a motorcycle which furnishes a unit swing type engine. CONSTITUTION:At the lower front side of an exhaust pipe 8 extending from a forward tilting cylinder 7 of a unit swing type engine 5, a guard member 10 inclining upward obliquely to the front side of a cycle body and furnishing a specific width in the cycle width direction has been combined. A curb stone and the like are defended by the guard member 10, and furthermore, since the guard member 10 is inclined upward obliquely to the front side of the cycle body, a shock applied to the exhaust pipe 8 is slackened and a damage of the installing part of the exhaust pipe 8 to the cylinder 7 or the exhaust pipe 8 itself can be prevented effectively.

Description

【発明の詳細な説明】[Detailed description of the invention]

【０００１】0001

【産業上の利用分野】本発明は、車体後部にユニットス
イング式エンジンを備える自動二輪車に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle equipped with a unit swing type engine at the rear of the vehicle body.

【０００２】0002

【従来の技術】スクータ型自動二輪車等の小型の自動二
輪車の中には、車体後部にユニットスイング式エンジン
を上下揺動自在に支持し、該ユニットスイング式エンジ
ンの前傾シリンダから下方へ延びる排気管を車体側方へ
延出した後、車体後方に向かって延ばし、後輪側方に位
置するマフラーに連結するものがある。[Prior Art] Some small motorcycles, such as scooter-type motorcycles, have a unit swing type engine supported at the rear of the vehicle body so as to be able to swing vertically, and an exhaust gas that extends downward from the forward tilting cylinder of the unit swing type engine. Some pipes extend to the side of the vehicle body, then extend toward the rear of the vehicle body, and are connected to the muffler located on the side of the rear wheels.

【０００３】0003

【発明が解決しようとする課題】ところが、上記自動二
輪車にあっては、排気管（特に車体側方に延出する部分
の下部）に縁石等が当たり、排気管のエンジンシリンダ
への取付部や当該排気管自体が損傷する等の不具合が発
生する虞がある。[Problems to be Solved by the Invention] However, in the above-mentioned motorcycle, the exhaust pipe (particularly the lower part of the part extending to the side of the vehicle body) is hit by a curb, etc., and the attachment part of the exhaust pipe to the engine cylinder or There is a risk that problems such as damage to the exhaust pipe itself may occur.

【０００４】本発明は上記問題に鑑みてなされたもので
、その目的とする処は、排気管の取付部や排気管自体を
損傷から有効に保護することができる自動二輪車を提供
することにある。The present invention has been made in view of the above problems, and its purpose is to provide a motorcycle that can effectively protect the exhaust pipe mounting portion and the exhaust pipe itself from damage. .

【０００５】[0005]

【課題を解決するための手段】上記目的を達成すべく本
発明は、車体後部にユニットスイング式エンジンを上下
揺動自在に支持し、該ユニットスイング式エンジンの前
傾シリンダから下方へ延びる排気管を車体側方へ延出し
た後、車体後方に向かって延ばし、後輪側方に位置する
マフラーに連結して成る自動二輪車において、前記排気
管の下部前方に、車体前方に向かって斜め上方に傾斜し
、且つ車幅方向に所定幅を有するガード部材を結着した
ことをその特徴とする。[Means for Solving the Problems] In order to achieve the above object, the present invention supports a unit swing type engine in the rear part of a vehicle body so as to be able to swing vertically, and an exhaust pipe extending downward from a forward-inclined cylinder of the unit swing type engine. In a motorcycle that extends to the side of the vehicle body, extends toward the rear of the vehicle body, and is connected to a muffler located on the side of the rear wheel, the exhaust pipe extends diagonally upward toward the front of the vehicle body at the lower front of the exhaust pipe. Its feature is that a guard member that is inclined and has a predetermined width in the vehicle width direction is attached.

【０００６】[0006]

【作用】本発明によれば、排気管の縁石等が当たり易い
部位である下部前方にガード部材が結着されているため
、縁石等はガード部材によって受けられ、しかもガード
部材は車体前方に向かって斜め上方に傾斜しているため
、排気管に加わる衝撃が緩和され、排気管の取付部や排
気管自体の損傷が有効に防がれる。[Operation] According to the present invention, since the guard member is attached to the lower front part of the exhaust pipe, which is a part that is likely to be hit by curb stones, etc., the curb stone etc. can be received by the guard member, and the guard member is directed toward the front of the vehicle body. Since the exhaust pipe is inclined diagonally upward, the impact applied to the exhaust pipe is alleviated, and damage to the exhaust pipe mounting part and the exhaust pipe itself is effectively prevented.

【０００７】[0007]

【実施例】以下に本発明の一実施例を添付図面に基づい
て説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

【０００８】図１は本発明に係るスクータ型自動二輪車
の側面図、図２は同自動二輪車後部の平面図、図３は排
気管前端部の側面図、図４は同平面図である。FIG. 1 is a side view of a scooter type motorcycle according to the present invention, FIG. 2 is a plan view of the rear part of the motorcycle, FIG. 3 is a side view of the front end of an exhaust pipe, and FIG. 4 is a plan view of the same.

【０００９】図１及び図２に基づいてスクータ型自動二
輪車１の概略構成を説明すると、該自動二輪車１の車体
の前、後部はそれぞれ前輪２、後輪３によって走行自在
に支持されており、前輪２はフロントフォーク４の下端
部に回転自在に軸支されている。The general structure of the scooter type motorcycle 1 will be explained based on FIGS. 1 and 2. The front and rear parts of the body of the motorcycle 1 are supported by front wheels 2 and rear wheels 3, respectively, so as to be freely movable. The front wheel 2 is rotatably supported by the lower end of the front fork 4.

【００１０】又、車体後部にはユニットスイング式エン
ジン５が上下揺動自在に支持されている。即ち、ユニッ
トスイング式エンジン５の前方上部は不図示のリンク部
材を介して車体フレームに軸支されおり、同エンジン５
の後端上部はリヤクッション６を介して車体フレームに
懸架されている。そして、ユニットスイング式エンジン
５の後端部から側方に延出する出力軸（車軸）には前記
後輪３が結着されている。A unit swing type engine 5 is supported at the rear of the vehicle so that it can swing vertically. That is, the front upper part of the unit swing type engine 5 is pivotally supported by the vehicle body frame via a link member (not shown).
The upper part of the rear end is suspended on the vehicle body frame via a rear cushion 6. The rear wheel 3 is connected to an output shaft (axle) extending laterally from the rear end of the unit swing type engine 5.

【００１１】ところで、上記ユニットスイング式エンジ
ン５はその前部に前傾シリンダ７を有しており、該シリ
ンダ７からは排気管８が延出している。この排気管８は
シリンダ７から下方に向かって延びた後、略直角に曲げ
られてユニットスイング式エンジン５の下方を外側方に
向かって延び、その後再び略直角に曲げられて車体後方
に向かって延び、後輪３の側方に斜めに配設されるマフ
ラー９に連結されている。By the way, the unit swing type engine 5 has a forward-inclined cylinder 7 at the front thereof, and an exhaust pipe 8 extends from the cylinder 7. The exhaust pipe 8 extends downward from the cylinder 7, is bent at a substantially right angle, extends outward below the unit swing type engine 5, and is then bent at a substantially right angle again toward the rear of the vehicle body. It extends and is connected to a muffler 9 that is disposed diagonally on the side of the rear wheel 3.

【００１２】而して、本実施例では、排気管８の下部前
方（外側方へ延びる部分の車軸方向中間前部）には、図
３及び図４に詳細に示されるガード部材１０が結着され
ている。このガード部材１０は平面視コの字状に成形さ
れた上面が開口するボックスを構成しており、これは側
面視で車体前方に向かって斜め上方に傾斜する傾斜曲面
１０ａ（図３参照）を有しており、車幅方向には所定の
幅を有している（図４参照）。。尚、ガード部材１０の
下部には水抜き孔１１が穿設されている。In this embodiment, a guard member 10 shown in detail in FIGS. 3 and 4 is attached to the lower front part of the exhaust pipe 8 (at the middle front part in the axle direction of the part extending outward). has been done. This guard member 10 constitutes a box shaped like a U-shape in plan view and having an open top surface, and has an inclined curved surface 10a (see FIG. 3) that is inclined obliquely upward toward the front of the vehicle body in side view. It has a predetermined width in the vehicle width direction (see FIG. 4). . Incidentally, a drain hole 11 is bored in the lower part of the guard member 10.

【００１３】以上のように、本実施例では車体の最下部
に位置する排気管８の縁石等が最も当たり易い部位にガ
ード部材１０が結着されているため、縁石等はガード部
材１０によって受けられ、しかもガード部材１０は車体
前方に向かって斜め上方に傾斜する傾斜曲面１０ａを有
するため、ガード部材１０に縁石等が当たった際に排気
管８に加わる衝撃が緩和され、排気管８のシリンダ７へ
の取付部や排気管８自体の損傷が有効に防がれる。As described above, in this embodiment, since the guard member 10 is attached to the part of the exhaust pipe 8 located at the lowest part of the vehicle body that is most likely to be hit by curb stones, etc., the guard member 10 prevents the curb stones from being received by the guard member 10. Furthermore, since the guard member 10 has an inclined curved surface 10a that is inclined obliquely upward toward the front of the vehicle body, the impact applied to the exhaust pipe 8 when a curb or the like hits the guard member 10 is alleviated, and the cylinder of the exhaust pipe 8 is Damage to the attachment part to 7 and the exhaust pipe 8 itself can be effectively prevented.

【００１４】又、ガード部材１０は排気管８の必要箇所
のみに設けられ、小さくて軽量であるため、これがユニ
ットスイング式エンジン５のバネ下重量の増大を招くこ
とはない。Furthermore, since the guard member 10 is provided only at necessary locations of the exhaust pipe 8 and is small and lightweight, it does not cause an increase in the unsprung weight of the unit swing type engine 5.

【００１５】[0015]

【発明の効果】以上の説明で明らかな如く、本発明によ
れば、車体後部にユニットスイング式エンジンを上下揺
動自在に支持し、該ユニットスイング式エンジンの前傾
シリンダから下方へ延びる排気管を車体側方へ延出した
後、車体後方に向かって延ばし、後輪側方に位置するマ
フラーに連結して成る自動二輪車において、前記排気管
の下部前方に、車体前方に向かって斜め上方に傾斜し、
且つ車幅方向に所定幅を有するガード部材を結着したた
め、排気管に縁石等が当っても、縁石等はガード部材に
よって受けられ、排気管に加わる衝撃が緩和され、排気
管の取付部や排気管自体の損傷が有効に防がれると効果
が得られる。As is clear from the above description, according to the present invention, a unit swing type engine is supported at the rear of a vehicle body so as to be able to swing vertically, and an exhaust pipe extends downward from a forward-inclined cylinder of the unit swing type engine. In a motorcycle that extends to the side of the vehicle body, extends toward the rear of the vehicle body, and is connected to a muffler located on the side of the rear wheel, the exhaust pipe extends diagonally upward toward the front of the vehicle body at the lower front of the exhaust pipe. tilted,
In addition, since a guard member having a predetermined width in the vehicle width direction is attached, even if the exhaust pipe is hit by a curb, the curb will be received by the guard member, the impact applied to the exhaust pipe will be alleviated, and the exhaust pipe mounting part and Effects can be obtained if damage to the exhaust pipe itself is effectively prevented.

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

【図１】本発明に係るスクータ型自動二輪車の側面図で
ある。FIG. 1 is a side view of a scooter type motorcycle according to the present invention.

【図２】自動二輪車後部の平面図である。FIG. 2 is a plan view of the rear part of the motorcycle.

【図３】排気管前端部の側面図である。FIG. 3 is a side view of the front end of the exhaust pipe.

【図４】排気管前端部の平面図である。FIG. 4 is a plan view of the front end of the exhaust pipe.

【符号の説明】[Explanation of symbols]

１　　　　　　自動二輪車３　　　　　　後輪５　　　　　　ユニットスイング式エンジン７　　　　
　　前傾シリンダ８　　　　　　排気管９　　　　　　マフラー１０　　　　ガード部材1 Motorcycle 3 Rear wheel 5 Unit swing type engine 7
Forward tilting cylinder 8 Exhaust pipe 9 Muffler 10 Guard member

Claims

【特許請求の範囲】[Claims]

【請求項１】　　車体後部にユニットスイング式エンジ
ンを上下揺動自在に支持し、該ユニットスイング式エン
ジンの前傾シリンダから下方へ延びる排気管を車体側方
へ延出した後、車体後方に向かって延ばし、後輪側方に
位置するマフラーに連結して成る自動二輪車において、
前記排気管の下部前方に、車体前方に向かって斜め上方
に傾斜し、且つ車幅方向に所定幅を有するガード部材を
結着したことを特徴とする自動二輪車。Claim 1: A unit swing type engine is supported at the rear of the vehicle body so as to be able to swing vertically, and an exhaust pipe extending downward from a forward-inclined cylinder of the unit swing type engine is extended to the side of the vehicle body and then directed toward the rear of the vehicle body. In a motorcycle that is extended and connected to a muffler located on the side of the rear wheel,
A motorcycle characterized in that a guard member is attached to a lower front portion of the exhaust pipe, the guard member being inclined obliquely upward toward the front of the vehicle body and having a predetermined width in the vehicle width direction.