Controllable multi-link excavating mechanism

The invention discloses a controllable multi-link excavating mechanism, which comprises a frame, a big arm swinging mechanism, a bucket rod lifting mechanism and a bucket turnover mechanism. The big arm swinging mechanism comprises a big arm and a swinging mechanism; the bucket rod lifting mechanism comprises a bucket rod and a lifting mechanism; the bucket turnover mechanism comprises a bucket and a turnover mechanism; the large arm is connected to the frame; the bucket rod is connected with the big arm; the bucket is connected with the bucket rod; and the lifting mechanism and the turnover mechanism are connected with the big arm through support frames. The traditional hydraulic transmission is replaced by adopting a novel link transmission mechanism, so that the defects that the hydraulic system of the traditional hydraulic excavator is complex and easy to leak oil and the like can be overcome; the excavating mechanism has the advantages of flexibility, quick action and the like ofa multi-degree-of-freedom controllable mechanism type excavator; and the link transmission part is simpler, the links and the joints are stressed better, and the excavating mechanism has bigger working space and is more suitable for manufacturing various excavators and other engineering machinery.