PROBLEM TO BE SOLVED: To provide a vehicle body frame of a saddle-riding type vehicle which is excellent in dimensional accuracy in a vehicle length direction even though it is made by welding.SOLUTION: A pivot frame 34 comprises a groove-shaped member 40, a lid member 44 covering the opening of the groove-shaped member 40, and a laser welding bead 45 which joins the lid member 44 to the groove-shaped member 40. Even if a weld metal solidifies and shrinks, it shrinks in a vehicle width direction but does not shrink in a vehicle longitudinal direction. Thus, the distance between a head pipe and a pivot shaft is properly maintained. Therefore, it is possible to provide a vehicle body frame of a saddle-riding type vehicle which is excellent in dimensional accuracy in a vehicle length direction even though it is made by welding.

    【課題】溶接製でありながら、車長方向の寸法精度が良好である鞍乗り型車両の車体フレームを提供することを課題とする。【解決手段】ピボットフレーム34は、溝形部材40と、この溝形部材40の開口に被せるリッド部材44と、このリッド部材44を溝形部材40に接合するレーザ溶接ビード45とからなる。【効果】溶着金属が凝固収縮するとしても、車両幅方向には収縮するが、車両長手方向には収縮しない。よって、ヘッドパイプとピボット軸との距離は適正に維持される。したがって、溶接製でありながら、車長方向の寸法精度が良好である鞍乗り型車両の車体フレームが提供される。【選択図】図4


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    Title :

    VEHICLE BODY FRAME OF SADDLE-RIDING TYPE VEHICLE


    Additional title:

    鞍乗り型車両の車体フレーム


    Contributors:

    Publication date :

    2015-11-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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