To provide an axle case structure which can inhibit cracks in a welding part without increasing a plate thickness of a cover and inhibit occurrence of weld defects when the cover is welded to an axle case.SOLUTION: An axle case structure of the invention includes: an axle case 1 having an expansion part 12 expanding in a vertical direction at a center as seen in a vehicle width direction and an opening 14 provided at the rear side of the expansion part 12; and a cover 3 which covers the opening 14 and is welded to the axle case 1. The cover 3 has: a cover body 15 having a semispherical shell shape; a flange part 16 formed integrally with an outer periphery of the cover body 15; and a lip part 18 which is formed integrally with an outer edge of the flange part 16 and is bent so as to separate from the axle case 1. In a state that the flange part 16 contacts with the axle case 1, the lip part 18 is flare-welded to the axle case 1.SELECTED DRAWING: Figure 1

    【課題】カバーの板厚を厚くすることなく溶接部における亀裂を抑制することができ、また、車軸ケースにカバーを溶接する際の溶接欠陥の発生を抑制することができる車軸ケース構造を提供する。【解決手段】本発明の車軸ケース構造は、車幅方向の中央において上下方向に膨出された膨出部12、及び膨出部12の後側に設けられた開口14を有する車軸ケース1と、開口14を覆って車軸ケース1に溶接されたカバー3と、を備え、カバー3は、半球殻状のカバー本体15と、カバー本体15の外周に一体形成されたフランジ部16と、フランジ部16の外縁に一体形成され車軸ケース1から離間するように曲げられたリップ部18とを有するものであって、フランジ部16が車軸ケース1に接触した状態で、リップ部18が車軸ケース1にフレア溶接されたことを特徴とする。【選択図】図1


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    Title :

    AXLE CASE STRUCTURE


    Additional title:

    車軸ケース構造


    Contributors:

    Publication date :

    2020-04-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60B VEHICLE WHEELS , Räder für Fahrzeuge / B23K Löten , SOLDERING OR UNSOLDERING



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