Telescopic arm structure, working arm and engineering machine

Abstract

The invention relates to the technical field of engineering machines, and particularly discloses a telescopic arm structure, a working arm and an engineering machine. The telescopic arm structure comprises a first section arm, a second section arm, a compensation mechanism and an oil circuit, the first section arm is slidably arranged on the second section arm in a sleeving mode, and the first section arm can extend or retract relative to the second section arm so that the working radius of a lifting appliance can be adjusted, the lifting appliance has a large working range and is high in applicability, the two ends of the compensation mechanism are fixed to the first section arm and the second section arm correspondingly, and the compensation mechanism can extend in a bent mode and expand; and the oil circuit is formed in the compensation mechanism in a penetrating mode and used for being connected with the lifting appliance to supply oil to the lifting appliance. When the second section arm extends out relative to the first section arm, the compensation mechanism extending in the bent mode expands; and when the second section arm retracts relative to the first section arm, the expanding compensation mechanism extends in the bent mode, and compared with related technologies, falling of the oil circuit can be avoided.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a telescopic arm structure, an operating arm and construction machinery. Background technique [0002] my country's woodlands are mostly 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 ...

AI Technical Summary

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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