PROBLEM TO BE SOLVED: To improve the rigidity of a revolving frame with respect to a torsional load around a central axis of a boom and a load in an axial direction of the boom.SOLUTION: A first reinforcing member 51 extends in a direction inclined to a longitudinal direction X. The first reinforcing member 51 includes a first front side attachment part 51f and a first rear side attachment part 51r. The first front side attachment part 51f is disposed at the right side Y2 of the center in the lateral direction Y of a front plate 25, disposed at the front side X1 of a revolving center 15a, and disposed at an upper side Z1 of a bottom plate 21 with a space from the bottom plate 21. The first rear side attachment part 51r is disposed at the left side Y1 of the center in the lateral direction Y of the front plate 25, disposed at the rear side X2 of the revolving center 15a, and disposed at the lower side Z2 of the first front side attachment part 51f.SELECTED DRAWING: Figure 1

    【課題】ブームの中心軸まわりのねじり荷重、および、ブームの軸方向の荷重に対する旋回フレームの剛性を向上させる。【解決手段】第1補強材51は、前後方向Xに対して傾いた方向に延びる。第1補強材51は、第1前側取付部51fと、第1後側取付部51rと、を備える。第1前側取付部51fは、前板25の横方向Y中央よりも右側Y2に配置され、旋回中心15aよりも前側X1に配置され、底板21よりも上側Z1かつ底板21との間に間隔をあけて配置される。第1後側取付部51rは、前板25の横方向Y中央よりも左側Y1に配置され、旋回中心15aよりも後側X2に配置され、第1前側取付部51fよりも下側Z2に配置される。【選択図】図1


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    Title :

    REVOLVING FRAME


    Additional title:

    旋回フレーム


    Contributors:

    Publication date :

    2018-08-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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