The invention provides a crane boom and a crane, and relates to the technical field of engineering machinery. A middle mast comprises a first supporting rod, a second supporting rod and a base; and the first supporting rod and the second supporting rod are hinged to the base to enable the first supporting rod and the second supporting rod to change the spreading angle between the first supportingrod and the second supporting rod; a constructor can correspondingly adjust the angle between the first supporting rod and the second supporting rod according to the real-time spreading angle betweentwo supporting arms of a super-lift device to make the included angle between two tensioning mechanisms in front of and behind the middle mast to be close to zero; the smaller the included angle is, the smaller lateral force borne by the middle mast is; and at the moment, a middle mast with a large structure can be prevented from being arranged while stability and performance are ensured, the structure size of the middle mast is reduced, and thus the self-weight of the middle mast is reduced. It can be seen from the above that through arrangement of the middle mast, the magnitude of the lateral force borne by the crane boom can be decreased, and thus the structure size and weight of the crane boom are reduced.
本发明提供了一种起重臂及起重机,涉及工程机械的技术领域,中间桅杆包括第一支撑杆、第二支撑杆和基座;所述第一支撑杆和所述第二支撑杆分别与所述基座铰接,以令所述第一支撑杆和所述第二支撑杆能够改变二者的展开角度。施工人员可根据超起装置的两个支撑臂实时的展开角度来对应调整第一支撑杆和第二支撑杆之间的角度,以令中间桅杆的前后方的两个张紧机构之间的夹角趋近于零;夹角越小,中间桅杆受到的侧向力越小。此时,在保证稳定性和性能的同时,能够避免设置较大结构的中间桅杆,减小中间桅杆的结构大小,从而降低中间桅杆的自重。由上可知,上述中间桅杆的设置能够减小其侧向力的受力大小,从而减小自身的结构大小和重量。
Crane boom and crane
起重臂及起重机
2020-09-25
Patent
Elektronische Ressource
Chinesisch
IPC: | B66C Krane , CRANES |