Folding jib structure and method for unfolding and folding the same

Abstract

The invention discloses a folding jib structure and a method for unfolding and folding the same. The folding jib structure comprises a principal arm (10), a support bar mechanism (20) and a fly jib (30) that are arranged on the principal arm, and a steel rope (40) reeled by a hoist and supported by the support bar mechanism support. The fly jib comprises a fly jib front segment (31) and a fly jibrear segment (32) that are in pivotal connection with each other; and one end of the steel rope is detachably connected to the fly jib. The folding jib structure also comprise a pulling plate (50), which includes at least a first portion (51) and a second portion (52) that are in detachable and pivotal connection; and the first portion and the second portion are respectively connected with the fly jib front segment and the support bar mechanism. According to the above technical scheme, the fly jib can be folded or unfolded through the pulling plate and the steel rope, so as to enhance hoisting performance and lower requirements on the steel rope strength. Besides, auxiliary equipment like an auxiliary crane is omitted, and manual dangerous operation is not needed.

Description

technical field [0001] The invention relates to a folding boom structure and a method of unfolding and folding the folding boom structure. Background technique [0002] For large-scale engineering equipment such as cranes, in order to reduce the assembly time of the boom system, and to reduce the height of the crane transition and improve the driving stability, the folding boom structure is usually used, such as the special hoisting crane for wind farms. Boom system. [0003] Existing folding boom structures such as Figure 1 to Figure 4 As shown, it includes the main arm 10, the support rod mechanism 20 and the auxiliary arm 30 installed on the main arm 10, the winch and the steel cable 40 wound by the winch and supported by the support rod mechanism 20, the auxiliary arm 30 includes mutual pivotable The front section 31 of the auxiliary arm and the rear section 32 of the auxiliary arm are connected. Wherein, the support rod mechanism 20 includes a fixed support rod 21 an...

AI Technical Summary

Problems solved by technology

In addition, in the unfolding operation, an auxiliary crane is needed to complete the unfolding action, which is highly dependent on auxiliary equipment, takes a long time to prepare, and is inefficient

In addition, when using the auxiliary crane, it is necessary to manually climb to the pivot joint between the front section 31 of the jib and the rear section 32 of the jib (up to more than 20 meters) to connect the hook of the auxiliary crane, which is labor-intensive, difficult and safe. poor sex

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