Discrete limited variable-speed input multiple-freedom-degree controllable mechanism type excavator

Abstract

A discrete limited variable-speed input multiple-freedom-degree controllable mechanism type excavator comprises a multiple-freedom-degree connecting rod mechanism, an internal combustion engine and a transmission device, is driven by the internal combustion engine. The internal combustion engine distributes power to driving rods of the multiple-freedom-degree connecting rod mechanism through the transmission device, and a state of constant-speed driving of the driving rods and a state that some driving rods are static and other driving rods performs driving at constant speed can be achieved through manual operation of a clutch device and a reserving device in the transmission device. Mutual matched movement of a moving arm lifting branch chain, a bucket rod swing branch chain and a bucket overturning branch chain is achieved under the matching effect of several driving rod driving states, transformable complicated movement trails of a bucket can be achieved according to the intention of a user, and various complicated excavating operations are finished. The discrete limited variable-speed input multiple-freedom-degree controllable mechanism type excavator overcomes the shortcoming that a hydraulic excavator is high in hydraulic element manufacture cost and complicated in maintenance, avoids power limitation suffered by the driving rods of the multiple-freedom-degree connecting rod mechanism driven by a control motor, and facilitates field construction.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a discrete finite variable speed input multi-degree-of-freedom mechanism excavator. Background technique [0002] Excavator is a common construction machine, which is mainly used in various earthwork constructions. Among them, the hydraulic excavator is the most widely used type of excavator, but the manufacturing cost of the hydraulic system is high, and problems such as oil leakage are prone to occur. These are long-standing thorny problems of hydraulic excavators. However, traditional single-degree-of-freedom mechanical excavators, commonly known as "electric shovels", can only achieve simple and unchangeable trajectory output, so they cannot be used in a wide range of fields like hydraulic excavators. [0003] With the development of motor technology and the improvement of control technology, the controllable mechanism provides a broad development space for construction ...

AI Technical Summary

Problems solved by technology

Among them, the hydraulic excavator is the most widely used type of excavator, but the manufacturing cost of the hydraulic system is high, and problems such as oil leakage are prone to occur. These are long-term thorny problems of hydraulic excavators.

However, traditional single-degree-of-freedom mechanical excavators, commonly known as "electric shovels", can only achieve simple and unchangeable trajectory output, so they cannot be used in a wide range of fields like hydraulic excavators.

[0003] With the development of motor technology and the improvement of control technology, the controllable mechanism provides a broad development space for construction machinery. The multi-degree-of-freedom controllable mechanism driven by the control motor not only has a large working space, flexible actions, and can complete complex and controllable structures. Variable motion trajectory output, and also has the advantages of low manufacturing cost and simple maintenance. The controllable mechanism excavator replaces the hydraulic transmission with a multi-degree-of-freedom linkage mechanism, which avoids the high machining accuracy of the hydraulic system and the maintenance cost. high, it is easy to cause problems such as oil leakage, but the controllable mechanism excavator mainly relies on the multi-degree-of-freedom linkage mechanism to work. In the past, to drive the multi-degree-of-freedom linkage mechanism, it often required multiple servo motors to drive each active rod. Driven separately, it is easy to be limited by power supply, and it is difficult to adapt to field construction operations. These shortcomings have certain restrictions on the application of multi-degree-of-freedom controllable mechanisms in the field of construction machinery

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