Crane boom and crane
A technology for lifting arms and cranes, applied in cranes, ships, cargo handling equipment, etc., can solve the problems of self-heavy and lateral force of the middle mast, reduce self-weight, reduce structure size, ensure stability and performance Effect
Pending Publication Date: 2020-09-25
SANY AUTOMOBILE HOISTING MACHINERY
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Problems solved by technology
[0004] However, the middle mast in the prior art is subjected to a relatively large lateral force, and a large structure needs to be installed to resist the lateral force, resulting in a large self-weight of the middle mast
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[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0028] figure 1 A schematic structural diagram of the cooperation between the middle mast and the jib provided by the embodiment of the present invention; figure 2 A schematic structural diagram of the cooperation between the middle mast and the jib provided by another embodiment of the present invention; image 3 for figure 1 The magnified figure at A in the center; where, figure 1 and figure 2 It is a schematic diagram showing different deployment angles of the first support rod 1 and the second support rod 2; as...
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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.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a boom and a crane. Background technique [0002] Currently, in order to meet the ever-increasing height requirements of wind power installations, there is an increasing demand for cranes with long booms. The jib of the existing large-scale telescopic boom crane often adopts the combined boom of telescopic boom + truss jib, and the total length often exceeds 100m. The deflection of the boom in the luffing plane and the slewing plane is too large, resulting in bad stress on the boom, and the lifting capacity of the crane is greatly reduced due to the limitation of the deflection and bearing capacity of the main boom. [0003] In the prior art, in order to improve the stress of the boom in the luffing plane and the slewing plane, a superlift device and an intermediate mast are usually added to the boom. Wherein, the two ends of the super-lifting device are respectiv...
Claims
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IPC IPC(8): B66C23/60B66C23/72
CPCB66C23/60B66C23/72
Inventor 尹乐龙何斌衡张响
Owner SANY AUTOMOBILE HOISTING MACHINERY