Lifting structure based on D-shaped shaft

The utility model discloses a lifting structure based on a D-shaped shaft, the lifting structure based on the D-shaped shaft comprises a trunk structure, the trunk structure is composed of a lifting motor, a contraction motor, the D-shaped shaft, a linear guide rail, a mechanical arm lifting main body structure, a chain, a gear and a rack; the D-shaped shaft is vertically distributed left and right, the D-shaped shaft is connected with the mechanical arm lifting connecting block in a sliding mode, the linear guide rail is vertically distributed up and down, the lifting motor is located below the mechanical arm lifting main body structure and controls the mechanical arm lifting connecting block to move in the direction of the D-shaped shaft, and the linear guide rail plays a role in stabilizing and guiding. The mechanical arm can be protected from being collided or scraped and collided with goods, and the mechanical arm is small in occupied space and has multiple flexibility. 本实用新型公开了基于D型轴的升降结构，基于D型轴的升降结构，包括躯干