Structure design and finite element analysis of a three axis mechanical arm

Aiming at the demand of a small size mechanical arm with simple transmission structure, low cost and low center of gravity for mobile platform and serving in educational or other non-manufacturing applications, a three axis mechanical arm is designed, analyzed and discussed in this paper. Firstly, according to the design requirements, the main technical parameters of the mechanical arm are determined, and the 3D model of each component of the mechanical arm is established by Solidworks software, and the joint transmission structure design and the whole triaxial mechanical arm assembly are completed. Secondly, the torque, angular acceleration and moment of inertia needed to drive the three-axis manipulator are calculated, and the joint motors and reducers are selected. Finally, the ANSYS Workbench software is used to static analysis of the mechanical arm link, when the load is 2kg, the deformation of the first axis mechanical arm link is 0.056mm and the deformation of the whole three axis mechanical arm link is 0.084mm, which meets the design requirements of the overall three axis mechanical arm.