Robot harmonic reducer flexible bearing

Flexible bearings are different from ordinary bearings in that their outer ring is very thin and prone to radial deformation. The ring is circular before the cam is installed, and becomes elliptical after it is installed.

Harmonic transmission uses the controllable elastic deformation of flexible components to transmit motion and power. It is characterized by a large transmission ratio and a wide range of applications, high precision, small backlash, large load-bearing capacity, high efficiency, small size, and weight. It is light, has smooth transmission, low noise, and can transmit motion to the sealed space.

The harmonic transmission transmission consists of three basic components: wave generator, flexspline, rigid spline and flexible bearing. The flexible bearing is the core component, and the transmission achieves the performance requirements of a high reduction ratio through the elastic deformation of the bearing.

When the flexible bearing is working, the inner ring is installed on the oval rigid wheel and bears cyclic stress load during work. The outer ring is installed on the flexspline. It continuously changes with the elastic deformation of the flexspline during work and not only bears cyclic stress load. , and bear alternating stress load.

These characteristics place extremely high requirements on the design and manufacturing of bearing inner and outer rings and cages, and only a few countries such as Japan and the United States can produce them abroad. The design and manufacturing level of flexible bearings used in harmonic transmission transmissions has fully reached the international advanced level. The design of flexible bearings has formed a complete theoretical system, the manufacturing process of the products is becoming increasingly perfect and mature, and the product quality is becoming increasingly stable.