Harmonic transmission is the use of flexible components can be controlled by the elastic deformation to transmit movement and power, which is characterized by large transmission ratio and wide range of applications, high precision, small space back, carrying capacity, high efficiency, small size, weight Light, smooth transmission, low noise, can pass to the sealed space movement. Harmonic transmission consists of three basic components: wave generator, flexible wheel, just round and flexible bearings. One of the flexible bearings is the core component, the transmission through the bearing elastic deformation to achieve high reduction ratio performance requirements. Flexible bearings in the work, the inner ring is mounted on the oval just the wheel, the work to withstand cyclic stress load, the outer ring is mounted on the flexspring, work with flexible round of the elastic deformation constantly changing, not only to withstand cyclic stress load , But also bear alternating stress load. These characteristics of the bearing inner ring and outer ring and the cage design and manufacture made a very high demand, only Japan, the United States and a few countries can produce. Flexible bearing design has formed a complete set of theoretical system, the product manufacturing process is maturing, mature, product quality is becoming more stable.
