Upper bracket of tower crane and tower crane

Abstract

The invention provides an upper bracket of a tower crane and the tower crane. The tower crane comprises crane arms (200) and a balanced arm (300), wherein the crane arms (200) comprise a first crane arm (210) and a second crane arm (220) which are impendent from each other and are arranged in parallel; the upper bracket comprises an upper bracket body, a crane arm connecting part (120) and a balanced arm connecting part (13), wherein the upper bracket body comprises a first side end and a second side end in opposite arrangement; the crane arm connecting part (120) is used for being connected with the crane arm (200), is arranged on the first side end of the first crane arm connecting part, and comprises a first crane arm connecting part connected with the first crane arm (210) and a second crane arm connecting part connected with the second crane arm (220); and the balanced arm connecting part (130) is used for being connected with a balanced arm (300), and is arranged on the second side end of the upper bracket body. According to the invention, the stress state of the upper bracket can be improved, and the stress concentration phenomenon is released.

Description

technical field [0001] The invention relates to the field of hoisting machinery, in particular to an upper support of a tower crane and the tower crane. Background technique [0002] Such as Figure 1 to Figure 4 As shown, the boom 200' of the large or super large tower crane in the prior art is a separate boom. Correspondingly, the upper support 100' of the tower crane includes a base body 110', a jib connecting portion 120', a balance arm connecting portion 130' and a connecting plate group 160 respectively disposed on two opposite side ends of the base body 110' '. The base body 110' bears the weight of all structures above the upper support 100' of the tower crane and the weight of the hoisted heavy objects, wherein 111' is a slewing mechanism, which is responsible for the realization of the slewing action of the tower crane. The jib attachment portion 120' includes two lug sets for attachment to the jib 200'. The balance arm connecting portion 130' also includes two ...

AI Technical Summary

Problems solved by technology

[0003] In the above prior art, since the jib of a large or super-large tower crane is a separate jib, the jib 200' of the tower crane is generally large in size and heavy in weight. When selecting and designing, large-scale motors, couplings, gearboxes and drums, as well as steel wire ropes with larger diameters will also be selected. The upper support 100' bears the responsibility. The base 110' of the upper support 100' is connected to the boom 200' through the two ear plate groups of the boom connection part 120'. The two ear plate groups need to bear a large force. As a result, the stress situation of the upper support 100' is relatively bad, and stress concentration is particularly prone to occur at the support point, which is not conducive to the design, material selection, type selection and production of the upper support 100', and wastes production costs.

Moreover, the size of the upper support 100' and the base body 110' of the upper support 100' needs to be enlarged along with the boom 200', and the weight is very heavy. It is also quite difficult to process the large-sized upper support 100', which is difficult to meet land transport

Images