Multi-closed-chain controllable excavation mechanism for keeping posture of bucket through metamorphism

Abstract

A multi-closed-chain controllable excavation mechanism for keeping the posture of a bucket through metamorphism comprises a rack, a big arm swing mechanism, a bucket rod lifting mechanism, a bucket turnover mechanism and an electromagnetic locking device. The big arm swing mechanism comprises a big arm and a swing mechanism body, the bucket rod lifting mechanism comprises a bucket rod and a lifting mechanism body, the bucket turnover mechanism comprises a bucket and a turnover mechanism body, the electromagnetic locking device is installed on a revolute pair, and the active metamorphism function is achieved by conducting electromagnetic locking on the revolute pair. According to the multi-closed-chain controllable excavation mechanism, a connecting rod transmission mechanism is adopted for replacing traditional hydraulic transmission, and the defects that hydraulic excavator hydraulic systems are complex and prone to oil leakage are overcome; because the electromagnetic locking device is adopted for the revolute pair, active metamorphism can be conducted according to different working conditions, and the multi-closed-chain controllable excavation mechanism has the flexibility of hydraulic excavators; three-degree-of-freedom excavation operation can be achieved through two active rods, the fabrication cost of the excavators is reduced, and the multi-closed-chain controllable excavation mechanism is suitable for manufacturing various excavators and other engineering machines.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a multi-closed-chain controllable excavating mechanism that realizes bucket posture maintenance through metamorphosis. 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 broa...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-closed-chain controllable excavation mechanism that maintains the attitude of the bucket through metamorphosis, which can overcome the shortcomings of traditional hydraulic excavators, such as high maintenance cost, high operating noise, high cost of hydraulic components, and insufficient response. ,

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