PROBLEM TO BE SOLVED: To provide a revolving frame of work machine, which allows an open hole to be formed on a vertical plate while suppressing decrease in rigidity of the revolving frame.SOLUTION: A revolving frame 1 comprises: a bottom plate 2 having a restrained part that is restrained by a swing bearing; a pair of vertical plates 3 which are erected on the bottom plate 2; and a pair of counter weight fitting parts 4 having a shape on which the counter weight can be fitted. A reinforcement part 6 on the vertical plate 3 is disposed at a position along at least a part of a force line L, which is obtained from a direction and scale of a main stress generated inside the vertical plates 3 by a bending load applied to the pair of vertical plates 3 from the counter weight fitted to the pair of counter weight fitting parts 4.SELECTED DRAWING: Figure 1

    【課題】旋回フレームの剛性を低下を抑えながら縦板に貫通孔を設けることが可能な作業機械の旋回フレームを提供する。【解決手段】旋回フレーム1は、旋回ベアリングに拘束される被拘束部分を有する底板2と、底板2に立設された一対の縦板3と、カウンターウェイトが取り付け可能な形状を有する一対のカウンターウェイト取付け部4とを備えている。補強部6は、縦板3において、一対のカウンターウェイト取付け部4に取り付けられるカウンターウェイトによって一対の縦板3に与えられる曲げ荷重によって縦板3の内部に生じる主応力の向きと大きさから求められた力線Lの少なくとも一部に沿う位置に、配置されている、【選択図】図1


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    Title :

    REVOLVING FRAME OF WORK MACHINE


    Additional title:

    作業機械の旋回フレーム


    Contributors:

    Publication date :

    2017-06-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    E02F Baggern , DREDGING / B62D MOTOR VEHICLES , Motorfahrzeuge



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