The invention relates to a crane, in particular a mobile truss boom crane, having an upper bracket and a boom hinged to the upper bracket for pivoting about a horizontal pivot axis. A boom is supported via a support frame mounted on the upper bracket to pivot about a horizontal pivot axis and is vertically variable by pivoting the support frame. According to the invention, the crane comprises a luffing aid, by means of which a torque acting in addition to a support can be applied to the boom in order to luffing the boom in a flat boom position. The luffing aid includes an auxiliary arm pivotally mounted on the upper bracket and connected to the upper bracket via a retaining element and to the boom via a variable length traction element. The traction element is designed to exert a traction force on the suspension arm in the direction of the auxiliary arm. The invention also relates to a method for luffing the boom of a crane according to the invention.

    本发明涉及一种起重机、特别是移动式桁架吊臂起重机,其具有上托架和铰接到该上托架以围绕水平枢转轴线枢转的吊臂。吊臂经由安装在所述上托架上的支撑框架支撑以围绕水平枢转轴线枢转,并可通过枢转所述支撑框架而上下变幅。所述起重机包括变幅辅助装置,利用所述变幅辅助装置,除了支撑件之外也起作用的扭矩可施加在所述吊臂上,以使所述吊臂在平坦吊臂位置中变幅。所述变幅辅助装置包括辅助臂,所述辅助臂可枢转地安装在所述上托架上,并经由保持元件连接到所述上托架并经由可变长度的牵引元件连接到所述吊臂。所述牵引元件设计成沿所述辅助臂的方向在所述吊臂上施加牵引力。本发明还涉及一种用于使根据本发明的起重机的所述吊臂变幅的方法。


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    Title :

    Crane having luffing aid and method for luffing such crane


    Additional title:

    具有变幅辅助装置的起重机以及这种起重机变幅的方法


    Contributors:

    Publication date :

    2024-10-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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