To realize reduction in the number of manufacturing processes and costs as well as reduction in weight of a vehicle body frame by reducing the number of components of the vehicle body frame.SOLUTION: A head pipe 11 for supporting a front wheel 16 through a steering shaft 12 comprises: a head pipe body 31 through which the steering shaft is inserted; an upper head pipe fixing member 32 comprising an upper steering shaft insertion portion joined to an upper end of the head pipe body; and a lower head pipe fixing member 33 comprising a lower steering shaft insertion portion joined to a lower end of the head pipe body. In a pair of left and right main frames 20 having the same structure, a tank rail portion 41 extending rearward from the head pipe, a down frame portion 42 extending obliquely downward and rearward from the head pipe, and a bridge frame portion 43 connecting the tank rail portion and the down frame portion are formed as one part in an A-shape in a vehicle side view. A top side 46 is joined to the head pipe body, and the upper head pipe fixing member and the lower head pipe fixing member are joined to the main frames.SELECTED DRAWING: Figure 1

    【課題】車体フレームの構成部品の部品点数を削減して、製造工数及びコストの低減、車体フレームの軽量化を実現できること。【解決手段】操舵軸12を介して前輪16を支持するヘッドパイプ11は、操舵軸を挿通するヘッドパイプ本体31と、ヘッドパイプ本体の上端部に接合される上操舵軸挿通部を備えた上ヘッドパイプ固定部材32と、ヘッドパイプ本体の下端部に接合される下操舵軸挿通部を備えた下ヘッドパイプ固定部材33と、を有してなり、同一構造で且つ左右一対のメインフレーム20は、ヘッドパイプから後方へ延びるタンクレール部41と、ヘッドパイプから斜め下後方へ延びるダウンフレーム部42と、タンクレール部及びダウンフレーム部を連結するブリッジフレーム部43とが、車両側面視でA字形状に一部品として成形され、頂辺部46がヘッドパイプ本体に接合され、上ヘッドパイプ固定部材と下ヘッドパイプ固定部材がメインフレームに接合される。【選択図】 図1


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    Title :

    VEHICLE BODY FRAME STRUCTURE OF MOTOR CYCLE


    Additional title:

    自動二輪車の車体フレーム構造


    Contributors:

    Publication date :

    2019-06-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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