To provide a connection structure that is able to easily connect an undercarriage and a revolving superstructure.SOLUTION: A connection structure according to the present invention, which is a connection structure for an undercarriage and a revolving superstructure of a construction machine, comprises: an insertion wall provided on one of the undercarriage and the revolving superstructure and having a vertically extending engagement hole in the form of a long hole; a pair of receiving walls provided on the other of the undercarriage and the revolving superstructure, defining an empty space in which the insertion wall is inserted, and having a fixing hole in a position corresponding to an upper end of the engagement hole; and a fixing device provided on the other of the undercarriage and the revolving superstructure, having a fixed pin inserted into the engagement hole and the fixing hole, and used for insertion/removal of the fixed pin into/from the engagement hole. The fixing device has: a passive member disposed between an empty space between the pair of receiving walls and pushed there by insertion of the insertion wall; a transmission mechanism that converts a pushed motion of the receiving members into an insertion motion of the fixed pin into the engagement hole; and an urging member that urges the transmission mechanism in a direction in which the fixed pin is pulled from the engagement hole.SELECTED DRAWING: Figure 3

    【課題】本発明は、下部走行体と上部旋回体とを容易に接続することができる接続構造を提供することを課題とする。【解決手段】本発明に係る接続構造は、建設機械の下部走行体と上部旋回体との接続構造であって、下部走行体及び上部旋回体の一方に設けられ、上下方向に延びる長穴状の係合穴を有する挿入壁と、下部走行体及び上部旋回体の他方に設けられ、挿入壁が挿入される隙間を形成し、係合穴の上端に対応する位置に固定穴を有する一対の受入壁と、下部走行体及び上部旋回体の他方に設けられ、係合穴及び固定穴に挿入される固定ピンを有し、この固定ピンを係合穴に挿抜する固定装置とを備え、固定装置が、一対の受入壁の隙間に配置され、挿入壁の挿入により押し込まれる受動部材と、受動部材の押し込み運動を固定ピンの係合穴への挿入運動に変換する伝動機構と、固定ピンを係合穴から引き抜く方向に伝動機構を付勢する付勢部材とを有することを特徴とする。【選択図】図3


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    Title :

    CONNECTION STRUCTURE


    Additional title:

    接続構造


    Contributors:

    Publication date :

    2019-10-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES / E02F Baggern , DREDGING



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