| 摘要 |
PURPOSE:To obtain a high stable torque of long life by radially moving the surface of a stator frictionally contacted with the contacting surface of a rotor. CONSTITUTION:A stator S is formed of a piezoelectric element 2 and an elastic unit 1, a ring-shaped rotor 3 is contacted under pressure with the unit 1 to contruct a surface wave motor. In this case, the rotor 3 is composed in a ring of constant width so that the center O' is displaced to the center O of the stator S, and the rotor 3 is rotated with the center O of the stator S as the center of rotation. Thus, when the rotor 3 rotates on the stator S, it is fluctuat ed in an arbitrary eccentric amount delta to the stator S. Thus, since the contacting surface of the rotor 3 moves momently on the surface 1a of the stator S, the entire surface 1a of the stator S can be efficiently used, and the wear of only one position can be eliminated. |
