To enable stability of welding quality to be maintained without deteriorating rigidity of a fastening part between a vehicle body frame and a subframe even when a nut is coupled to the vehicle body frame by spot-welding.SOLUTION: A vehicle body fastening part structure includes: a vehicle body frame; a subframe attached to the vehicle body frame; a welding pipe nut coupled to the vehicle body frame; and a bolt fastening the subframe to the welding pipe nut. The welding pipe nut includes: a pipe portion inserted into the vehicle body frame from the outside; a coupling flange portion formed at a base of the pipe portion and coupled to the outer surface of the vehicle body frame by spot-welding; and a boss portion disposed in a protruding manner on the surface of the coupling flange portion facing the pipe portion. A seating surface is disposed at an end surface of the boss portion, and the subframe is fastened in contact with the seating surface.SELECTED DRAWING: Figure 12

    【課題】車体フレームにナットをスポット溶接にて結合させても、車体フレームとサブフレームとの締結部の剛性が低下することがなく溶接品質の安定性が維持できるようにする。【解決手段】車体締結部構造は、車体フレームと、車体フレームに取付けられるサブフレームと、車体フレームに結合される溶接用パイプナットと、サブフレームを溶接用パイプナットに締結するボルトとを備え、溶接用パイプナットが、車体フレームに対して外方から挿通されるパイプ部と、パイプ部の基部に形成されて車体フレームの外面にスポット溶接により結合される結合フランジ部と、結合フランジ部のパイプ部と対向する側の面に突設されたボス部とを有し、ボス部の端面に座面が設けられ、この座面にサブフレームが当接されて締結される。【選択図】図12


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    Title :

    VEHICLE BODY FASTENING PART STRUCTURE


    Additional title:

    車体締結部構造


    Contributors:

    Publication date :

    2025-01-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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