Three-level telescopic arm

Abstract

The invention provides a three-level telescopic arm which comprises a one-level basic arm body, a first-level telescopic arm body and a second-level telescopic arm body. The first-level telescopic arm body is embedded in the basic arm body in a sliding mode. The second-level telescopic arm body is embedded in the first-level telescopic arm body in a sliding mode. The three-level telescopic arm further comprises a drive wheel, a second chain wheel, a third chain wheel, a fourth chain wheel, a fifth chain wheel, a sixth chain wheel and a seventh chain wheel, wherein the drive wheel, the second chain wheel and the third chain wheel are arranged on the basic arm body, and the fourth chain wheel, the fifth chain wheel, the sixth chain wheel and the seventh chain wheel are arranged on the first-level telescopic arm body. The drive wheel drives the second chain wheel to rotate through a chain. A first chain winds around the second chain wheel and the third chain wheel to be connected with the front end and the rear end of the first-level telescopic arm body. A second chain winds around the fourth chain wheel and the fifth chain wheel to be connected with the first-level telescopic arm body and the second-level telescopic arm body. A third chain winds around the sixth chain wheel and the seventh chain wheel to be connected with the second-level telescopic arm body and the basic arm body.

Description

technical field [0001] The invention relates to a telescopic arm technology, in particular to a layer-by-layer nested three-stage telescopic arm. Background technique [0002] At present, the traditional nested telescopic boom structure is mostly two-stage, and its basic boom and telescopic boom transmission forms are generally two types: cylinder transmission and chain transmission. This two-stage telescopic arm structure is generally only used for mechanical equipment used in relatively short distances. However, due to different use environments and use requirements, the length of the telescopic arm is not enough to make it difficult to meet the requirements during actual use. The existing arm-to-arm transmission form cannot be expanded to 3 levels or above, mainly because if the multi-stage telescopic arm is driven by an oil cylinder, the oil cylinder itself is heavy so that this form cannot be realized in practical applications, and the chain The existing link structur...

AI Technical Summary

Problems solved by technology

However, due to different use environments and use requirements, the length of the telescopic arm is not enough to make it difficult to meet the requirements in the actual use process

The existing arm-to-arm transmission form cannot be expanded to 3 levels or above, mainly because if the multi-stage telescopic arm is driven by an oil cylinder, the oil cylinder itself is heavy so that this form cannot be realized in practical applications, and the chain The existing link structure of the transmission form cannot drive the synchronous expansion and contraction of the multi-stage telescopic arm

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