The invention relates to the field of engineering machinery, and discloses a crane boom which comprises a bottom knuckle arm, a bottom auxiliary knuckle arm assembly, a middle main knuckle arm assembly, a top auxiliary knuckle arm assembly and a top knuckle arm which are sequentially connected in the longitudinal direction, and further comprises a transition knuckle arm assembly, the transition knuckle arm assembly comprises a first-stage bottom transition knuckle arm connected between the bottom knuckle arm and the bottom auxiliary knuckle arm assembly and a second-stage bottom transition knuckle arm connected between the bottom auxiliary knuckle arm assembly and the middle main knuckle arm assembly. The second-stage top transition knuckle arm is connected between the middle main knuckle arm assembly and the top auxiliary knuckle arm assembly; and the first-stage top transition knuckle arm is connected between the top auxiliary knuckle arm assembly and the top knuckle arm. According to the invention, the abrupt change degree of the section width between the bottom knuckle arm and the middle main knuckle arm assembly and between the top knuckle arm and the middle main knuckle arm assembly is greatly reduced, the stress concentration is greatly reduced, and the lifting performance and safety of the crane boom are greatly improved.
本发明涉及工程机械领域,公开了一种起重机臂架,包括沿纵向依次相连的底节臂、底部副节臂组件、中间主节臂组件、顶部副节臂组件以及顶节臂,起重机臂架还包括过渡节臂组件,过渡节臂组件包括连接于底节臂和底部副节臂组件之间的一级底部过渡节臂、连接于底部副节臂组件和中间主节臂组件之间的二级底部过渡节臂、连接于中间主节臂组件和顶部副节臂组件之间的二级顶部过渡节臂以及连接于顶部副节臂组件和顶节臂之间的一级顶部过渡节臂。本发明大大降低了底节臂与中间主节臂组件之间以及顶节臂与中间主节臂组件之间的截面宽度突变程度,极大地减少应力集中,较大地提高了起重机臂架的起重性能和安全性。
Crane boom and crane
起重机臂架和起重机
30.09.2022
Patent
Elektronische Ressource
Chinesisch
IPC: | B66C Krane , CRANES |