PROBLEM TO BE SOLVED: To provide a vehicle body frame structure that secures high vehicle body frame strength, vehicle body rigidity and a layout space for a vehicle body component arranged forward and under a seat and is improved in the degree of freedom of a layout.SOLUTION: A vehicle body frame structure has: a front frame 11 comprising a pair of right and left down frames 16 that extend downward from a head pipe 14, a pair of right and left body frames 17 that extend rearward from the down frames, and a pair of right and left underframes 18 that extend rearward in a horizontal direction from the lower ends of the down frames and rise rearward and upward; a pair of right and left rear frames 12 extending rearward and upward from the underframes; and a bridge frame 26 provided to straddle base sides between the rear frames, to which the rising rear ends of the underframes are attached. The underframes, the rear frames and the bridge frame are connected to each other to form a triangle shape in the side view of the vehicle, one side of which is formed of each frame of the underframes, the rear frames and the bridge frame.SELECTED DRAWING: Figure 1

    【課題】高い車体フレーム強度と車体剛性とシート下前方配置の車体構成物のレイアウトスペースを確保し、レイアウトの自由度を向上させた車体フレーム構造を提供する。【解決手段】車体フレーム構造は、ヘッドパイプ14から下方に延びる左右一対のダウンフレーム16とダウンフレームから後方に延びる左右一対のボディフレーム17と前記ダウンフレームの下端部から水平方向後方に延び後上方に立ち上がる左右一対のアンダーフレーム18とを備えた前部フレーム11と、アンダーフレームから後上方に延びる左右一対のリヤフレーム12と、リヤフレーム間の基部側に跨ぐように設けられアンダーフレームの立上り後端部を取り付けるブリッジフレーム26とを有しアンダーフレーム、リヤフレームおよびブリッジフレームを接続し車体側面視でアンダーフレーム、リヤフレームおよびブリッジフレームの各フレームを一辺とする三角形状を構成したことを特徴とする。【選択図】図1


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    Title :

    VEHICLE BODY FRAME STRUCTURE OF MOTORCYCLE


    Additional title:

    自動二輪車の車体フレーム構造


    Contributors:

    Publication date :

    2018-01-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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