Work arm and engineering machine

Abstract

The invention provides a work arm and an engineering machine. The work arm comprises a telescopic arm and a pipeline guiding device, wherein the pipeline guiding device comprises multistage guide rails, a pipeline box, a drag chain and a drag chain guiding groove, wherein the multistage guide rails are arranged on the telescopic arm along the extending direction of the telescopic arm and comprisemulti-section tracks which are sequentially and telescopically connected; the first-section track in the multi-section track is connected to a basic arm of the telescopic arm; the pipeline box is connected to the tail-section track of the multistage guide rails along the extending direction of the telescopic arm; the first end of the pipeline box is connected with an arm head of a tail arm sectionof the telescopic arm; the first end of the drag chain is connected to the second end of the pipeline box; the drag chain guiding groove is arranged on the basic arm along the extending direction ofthe telescopic arm and is used for bearing the drag chain; the second end of the drag chain is connected to the first end, away from the arm tail of the telescopic arm, of the drag arm guiding groove.The work arm and the engineering machine with the work arm disclosed by the invention have the advantages that the length of the pipeline box is favorably reduced, overall dimension of the pipeline guiding device is reduced, the interference risk of the pipeline guiding device and other structures is reduced and application range is wider.

Description

Technical field [0001] The present disclosure relates to the technical field of construction machinery, in particular to a working arm and construction machinery. Background technique [0002] The pipeline guiding device is widely used in construction machinery with telescopic arms. Its function is to accommodate the tubing, wires and other pipelines of the telescopic arm, so that the pipeline expands and contracts with the telescopic arm in the direction of motion of the telescopic arm. Pipeline guiding devices for construction machinery are divided into built-in and external. Most of the external pipeline guides use the combination of towline and pipeline box to reduce the length of the towline, thereby reducing costs. The stroke of the pipeline box of the external pipeline guiding device is generally equal to the stroke of the telescopic boom. Since the telescopic boom of most boom construction machinery has a long stroke, the length of the pipeline box is too long, and the p...

AI Technical Summary

Problems solved by technology

The stroke of the pipeline box of the external pipeline guide device is generally equal to the stroke of the telescopic arm. Since the stroke of the telescopic arm of most boom-type construction machinery is long, the length of the pipeline box is too long, and the probability of interference with other external parts increases.

Images