| 摘要 |
When an actuator using a conventional piezoelectric element is used as a general-purpose mechanical component, such as a linear actuator and an electric cylinder, the absence or weak constraint of a guide in the moving direction causes the problem that the moving direction of a moving member is changed or the moving member is rotated due to a change in the posture of the moving member by an external force. A restraint member presses a rectangular parallelepiped-shaped output shaft, which has high stiffness, thermal conductivity, and lubricity and to which a piezoelectric element is attached at one end, against a guide member so as to limit the degree of freedom to one degree, in order to realize a linear actuator, an electric cylinder, and a force generation device that can be used for general purposes and have a high straight movement property. Also, an output member having a mass that is commensurate with the mass of the piezoelectric element is attached to the other end of the output shaft to improve a generated force, stiffness, and usability. |
| 主权项 |
1. A drive mechanism comprising:
a moving unit including an output shaft having a shape of a rectangular parallelepiped and a vibrator fixed to one of surfaces of the output shaft; a guide member having an interface fixed to an external device; and a restraint member fixed to the guide member, for restraining the output shaft, together with the guide member, such that the output shaft has a degree of freedom only in a direction of a line connecting a center of a surface to which the vibrator is fixed, out of outer surfaces of the output shaft, to a center of a surface opposite the surface to which the vibrator is fixed, without having other degree of freedom, wherein the vibrator is caused to vibrate so as to apply a vibration to the output shaft and generate a force to move the moving unit relative to the guide member and the restraint member. |
