A three-degree-of-freedom controllable mechanism excavator

Abstract

The invention relates to a 3-dof (three degrees of freedom) controllable mechanism type excavator which comprises a movable arm lifting mechanism, a bucket rod ascending and descending mechanism, a bucket turning-over mechanism, a travelling mechanism, a slewing mechanism and a stand. The movable arm lifting mechanism comprises a movable arm and a lifting mechanism; the bucket rod ascending and descending mechanism comprises a bucket rod and an ascending and descending mechanism; the bucket turning-over mechanism comprises a bucket and a turning-over mechanism; and the movable arm, the bucket rod and the bucket are driven by a servo motor which is arranged on the stand through the lifting mechanism, the ascending and descending mechanism and the turning-over mechanism respectively. The 3-dof controllable mechanism type excavator adopts a new connecting rod to replace the hydraulic transmission, is free from the defects of the hydraulic excavator that the hydraulic elements have high requirements for the manufacturing precision, the hydraulic oil can be seriously affected by the temperature, and the fault of the hydraulic system is not easy to check and debug. Compared with other controllable mechanism type excavators, the 3-dof controllable mechanism type excavator has the advantages that the number of connection rods is reduced, the weight is lowered and the load-carrying capacity is improved, and the defects of complex structure and heavy weight of the connecting rod mechanism are overcome.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to an excavator with a three-degree-of-freedom controllable mechanism. Background technique [0002] Excavator is the most important type of construction machinery in the field of construction machinery today. It is widely used in various construction work, which effectively reduces people's work intensity and improves work efficiency, because hydraulic transmission has small size, light weight, and is easy to implement. Overload protection and other advantages, most excavators today use hydraulic transmission, but excavators using hydraulic transmission also have many shortcomings and shortcomings. First, the hydraulic system requires high manufacturing precision, complex processes and high costs. Component maintenance requirements are high, and a high technical level is required. Secondly, hydraulic transmission is easily affected by temperature changes, and it is not suitabl...

AI Technical Summary

Problems solved by technology

Although some existing controllable mechanism excavators have avoided many shortcomings of the hydraulic system, there are still places that need to be improved. Some controllable mechanism excavators have simple linkage mechanisms, but the working space is too small. Working space, but there are disadvantages such as huge connecting rod transmission part, complex mechanism, excessive weight, and poor force on each rod.

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