Ultrasonic engine, has rotor arranged opposite to stator in rotatable manner, where rotor includes contact surface creating pressure contact with stator, and resin layer designed with rigidity on contact surface

摘要

The engine has a comb body (12) with a set of comb-like projections (121) arranged in a circumference, and a piezoelectric body (13) arranged in the comb body in a fixed manner. A rotor (2) is arranged opposite to a stator (1) in a rotatable manner, where the rotor includes a contact surface creating a pressure contact with the stator. A resin layer (4) is designed with rigidity on the surface, where the layer includes a solid lubricant. The contact area is formed with a radial width that is smaller than the body. The rotor and stator are made of metal material.