Power train for a motorcycle

Abstract

The invention relates to a power train, for a motorcycle, comprising a drive unit (11) provided with an engine (13) and being pivotally connectable to a body (2) of the motorcycle, an exhaust pipe (20) extending towards the rear from the engine (13), and a support unit (22) interposed between the drive unit (11) and a midway section (21) of the exhaust pipe (20) in its longitudinal direction, wherein the support unit (22) comprises a first bracket (28) provided on the drive unit and a second bracket (30) provided on the midway section (21) of the exhaust pipe (20). <>The invention aims to improve such a power train wherein the size and the weight of the support unit (22) for the support of the exhaust pipe (20) can be reduced. <>Therefore, the invention proposes that a pair of engaging members (31,31) connecting a rear end part of the first bracket (28) and a front end part of the second bracket (30) with each other are arranged vertically above each other.

Description

technical field [0001] The present invention relates to a drive device for a saddle-ride vehicle including a drive unit having an engine, an exhaust pipe extending from the engine, and a support device for supporting the exhaust pipe on the engine. Background technique [0002] Among the drive devices for the above-mentioned saddle-riding vehicles, conventionally there are devices shown in the above-mentioned Patent Document 1 (Japanese Patent Laid-Open No. 9-256843 ) and Patent Document 2 (Japanese Patent Laid-Open No. 2001-97269 ). According to these publications, each of the drive devices includes: a drive unit having an engine and being pivotally supported on the vehicle body in a swingable manner; an exhaust pipe extending rearward from the engine; Supporting means on the aforementioned engine. [0003] More specifically, according to the above-mentioned Patent Document 1, the above-mentioned supporting device has: a first bracket protru...

AI Technical Summary

Problems solved by technology

[0006] However, according to the above-mentioned Patent Document 1, the second bracket protrudes upward only from the middle part of the exhaust pipe. Therefore, the protruding dimension of the first bracket that is fastened to the protruding end portion of the second bracket is often smaller than that of the second bracket. It is long, and since the first fastener that fastens the protruding ends of the above-mentioned first and second brackets to each other is single, it is possible to increase the support strength of the above-mentioned support device for supporting the exhaust pipe on the above-mentioned engine. appear insufficient

[0007] On the other hand, according to the above-mentioned Patent Document 2, since the above-mentioned first bracket is a member that supports the rear wheel on the engine, and has a large size, it is often too heavy as a supporting device for supporting the exhaust pipe on the above-mentioned engine.

Moreover, each fastener of the above-mentioned Patent Document 2 is composed of simple bolt holes formed on each bracket and bolts inserted into these bolt holes, so each fastener is used to absorb the above-mentioned engine. The relative error between the exhaust pipe and the exhaust pipe is not easy, and as a result, the work of assembling the exhaust pipe on the drive unit through the above-mentioned support device may become complicated.

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