Single-cylinder plug pin type telescopic arm, crane and telescoping method of single-cylinder plug pin type telescopic arm

Abstract

The invention relates to a single-cylinder plug pin type telescopic arm, a crane and a telescoping method of the single-cylinder plug pin type telescopic arm. The single-cylinder plug pin type telescopic arm comprises a basic arm and at least one section of telescopic arm which is sleeved in the basic arm, wherein coaxial central holes are formed in the tails of the telescopic arms; a telescopic oil cylinder is arranged in the central holes and comprises a cylinder rod and a cylinder barrel; at least two cylinder heads are fixedly sleeved outside the cylinder barrel in the longitudinal direction; at least three arm pin holes are respectively formed in the basic arm and the telescopic arm in the longitudinal direction. The single-cylinder plug pin type telescopic arm provided by the invention adopts the telescopic oil cylinder and the at least two cylinder heads; each cylinder head can be used for locking and unlocking the telescopic oil cylinder and any one telescopic arm; in a relay manner, the telescopic arms stretch or shrink; telescoping of the single-cylinder plug pin type telescopic arm is realized; the length of the oil cylinder is reduced; the cylinder diameter and the rod diameter of the oil cylinder are reduced; the cost of the oil cylinder is lowered; the loading weight is reduced; the hoisting capability is improved; the design capability of the crane is improved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a single-cylinder bolt-type telescopic arm, a crane including the single-cylinder bolt-type telescopic arm and a telescoping method for the single-cylinder bolt-type telescopic arm. Background technique [0002] The single-cylinder bolt system is a device built into the boom of the crane to realize the telescopic function of the boom. It is mainly composed of a telescopic boom and a telescopic oil cylinder, including the boom pin, the boom pin hole, the cylinder head, the cylinder pin, Cylinder rods, cylinder barrels, dovetail grooves, detection switches and other auxiliary facilities are the main functional components for the telescopic boom. The cylinder head is located at a certain position of the cylinder barrel or piston rod of the telescopic cylinder, and is used to control the device for fixing and separating the telescopic cylinder and the telescopic arm, mainly inclu...

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