The invention discloses a telescopic tower crane arm, and belongs to the field of tower cranes, the telescopic tower crane arm comprises a cargo boom, a variable-amplitude trolley mounted on the cargo boom and a lifting hook suspended on the variable-amplitude trolley, the cargo boom is of a multi-stage telescopic structure, the cargo boom comprises a main arm and a plurality of movable arms sequentially and movably connected relative to the main arm, and each movable arm is provided with a telescopic driving device; the main arm and each movable arm are provided with two parallel and opposite walking rails, and the tip of each walking rail is provided with a connecting rail used for being connected with the walking rail located on one side of the tip of the walking rail. The variable-amplitude trolley comprises a trolley body, vertical supporting arms are installed on the two opposite sides of the top face of the trolley body respectively, transverse supporting arms are fixedly installed on the vertical supporting arms, the free ends of the transverse supporting arms are rotationally connected with walking wheels matched with the walking rails, and a variable-amplitude device used for driving the variable-amplitude trolley to move is further installed on the main arm. The boom retracting operation efficiency of the cargo boom can be effectively improved, and the design is reasonable.
本发明公开了一种可伸缩塔吊臂,属于塔吊领域,包括起重臂、安装在起重臂上的变幅小车以及悬吊在变幅小车上的吊钩,起重臂为多级伸缩构造,起重臂包括主臂以及相对于主臂依次活动连接的多个活动臂,各活动臂均设置伸缩驱动装置;主臂以及各活动臂上安装有两个平行且相对布置的行走轨道,且各行走轨道的梢部均安装有用于与位于其梢部一侧的行走轨道相驳接的驳接轨道;变幅小车包括车体,车体的顶面的两个相对侧分别安装有竖向支臂,竖向支臂上固定安装有横向支臂,横向支臂的自由端可转动连接有与行走轨道相适配的行走轮,主臂上还安装有用于驱动变幅小车运动的变幅装置。本发明不但能够有效提高起重臂的缩臂操作效率,而且设计合理。
Telescopic tower crane arm
一种可伸缩塔吊臂
2022-07-15
Patent
Electronic Resource
Chinese
IPC: | B66C Krane , CRANES |