The invention provides an arm support device and engineering machinery, and the arm support device comprises an arm support structure with a first end hinged to a first hinge point of a rotary table; the first end of the variable-amplitude oil cylinder is hinged to the second hinge point of the rotary table, and the second end of the variable-amplitude oil cylinder is hinged to the third hinge point of the arm support structure; the first end of the auxiliary oil cylinder is hinged to a fourth hinge point of the rotary table, the second end of the auxiliary oil cylinder is hinged to a fifth hinge point of the arm support structure, the variable-amplitude oil cylinder and the auxiliary oil cylinder are used for synchronously driving the arm support structure to rise an arm, the fourth hinge point is located between the first hinge point and the second end of the arm support structure, and the fourth hinge point is arranged close to the first hinge point. According to the cantilever crane device, the variable-amplitude oil cylinder and the auxiliary oil cylinder are installed on the rotary table, the variable-amplitude oil cylinder and the auxiliary oil cylinder are supported through the rotary table, the variable-amplitude oil cylinder and the auxiliary oil cylinder are matched to jointly conduct arm lifting driving on the cantilever crane structure, insufficient arm lifting thrust is avoided, and meanwhile the supporting strength can be ensured; and the safety and the reliability of arm lifting of the arm support structure are ensured.

    本发明提供一种臂架装置及工程机械,所述臂架装置包括:臂架结构,第一端铰接于转台的第一铰点;变幅油缸,第一端铰接于所述转台的第二铰点,第二端铰接于所述臂架结构的第三铰点;辅助油缸,第一端铰接于所述转台的第四铰点,第二端铰接于所述臂架结构的第五铰点,所述变幅油缸和所述辅助油缸用于同步驱动所述臂架结构起臂,第四铰点位于第一铰点和所述臂架结构的第二端之间,且第四铰点靠近第一铰点设置。本发明臂架装置通过在转台上安装变幅油缸和辅助油缸,通过转台支撑变幅油缸和辅助油缸,能通过变幅油缸和辅助油缸配合共同对臂架结构进行起臂驱动,避免起臂推力不足的同时还能确保支撑强度,确保了臂架结构起臂的安全性和可靠性。


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    Title :

    Cantilever crane device and engineering machinery


    Additional title:

    臂架装置及工程机械


    Contributors:
    LUO XIANZHI (author) / YIN LINTAN (author) / CHEN JIA (author) / ZENG NA (author) / ZHENG BAOMI (author) / XIAO ZHIXIONG (author) / LI ZHIWEI (author)

    Publication date :

    2025-03-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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