A telescopic arm structure, operating arm and engineering machinery

Abstract

The invention relates to the technical field of engineering machinery, and specifically discloses a telescopic arm structure, an operating arm and construction machinery. The telescopic arm structure includes a first section arm, a second section arm, a compensation mechanism and an oil circuit, Set on the second boom, the first boom can be extended or retracted relative to the second boom, so that the working radius of the spreader can be adjusted. The spreader has a large working range and strong adaptability. The two ends of the compensation mechanism They are respectively fixed on the first joint arm and the second joint arm, and the compensation mechanism can be bent, extended and unfolded; the oil passage is passed through the compensation mechanism and used to connect with the spreader to supply oil to the spreader. When the second section arm stretches out relative to the first section arm, the bending and extending compensation mechanism unfolds; when the second section arm retracts relative to the first section arm, the unfolding compensation mechanism bends and extends. Compared with the related art, it can Avoid oil circuit drop.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a telescopic arm structure, a working arm and a construction machinery. Background technique [0002] Most of the forest land in my country is planted in relatively steep landforms, and the existing mature fixed-length and full-length felling machinery and techniques cannot be used, which brings great difficulties to the felling of economic forests. [0003] At present, only semi-mechanized operation technology can be used. It is necessary to build a winding road in the forest to enable related construction machinery, such as excavators or loaders, to enter the forest. Because the working arm of construction machinery only has the function of bending and extending, but not telescopic. Therefore, the range that construction machinery can grab is limited. For wood far from the roadside of Panshan, the felled wood can only be manually dragged from the forest land to t...

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Problems solved by technology

[0002] Most of the forests in our country are planted on relatively steep landforms, and the existing mature fixed-length and full-length harvesting machinery and techniques cannot be applied, which brings great difficulties to the harvesting of economic forests.

[0003] At present, only semi-mechanized operation technology can be used. It is necessary to build winding roads in the forest so that relevant construction machinery, such as excavators or loaders, can enter the forest to work. Because the operating arms of construction machinery only have the function of bending and stretching, but not telescopic functions. , so the range that construction machinery can grab is limited. For timber that is far away from the side of the winding mountain road, the felled timber can only be dragged from the forest land to the side of the winding mountain road manually, and then loaded into the transport vehicle by construction machinery. This results in time-consuming manual work

At the same time, construction machinery drives the spreader to move through the operating arm to carry wood. The spreader is loaded through hydraulic oil, and the oil tank on the body and the oil circuit of the spreader need to be configured. In the prior art, the oil circuit is usually fixed on the operating arm, which can It bends with the bending of the working arm. If the working arm is set to be retractable, if the existing oil circuit is still used, it will cause the oil circuit to fall when the working arm is stretched, which will easily cause damage to the oil circuit. It is not applicable

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