Multi-purpose mechanical arm device based on plane quadrilateral mechanism

The invention discloses a multi-purpose mechanical arm device based on a plane quadrilateral mechanism. The multi-purpose mechanical arm device comprises a functional module, a steering engine, a drive arm, a driven arm and a fixed carrier; the steering engine is arranged on the fixed carrier; the drive arm and the driven arm are spaced with each other and are parallel to each other; the upper end of the drive arm and the upper end of the driven arm are rotatably connected with the functional module through hinges, separately; the lower end of the drive arm is connected with the rotary shaft of the steering engine; the lower end of the driven arm is rotatably connected with a positioning plate of the steering engine through a hinge; and when the rotary shaft of the steering engine rotates, the drive arm synchronously swings along with the rotary shaft, so that the driven arm and the functional module are driven to carry out corresponding action in a running track of the drive arm. According to the multi-purpose mechanical arm device disclosed by the invention, the technical means are simple and convenient, and the steering engine is used for controlling motion angle size of the drive arm and the driven arm, so that the functional module realizes position control on the functional module on different positions of the space, is different under different situations and is used for meeting functional needs under the special situations.