| 摘要 |
PROBLEM TO BE SOLVED: To stabilize a control state between an outputting section of an ultra sonic linear motor and a driven body by forming projections, which can be brought into contact with a contact face of the driven body, on a contact face of the outputting section of the motor and thereby forming a recess for remov ing friction powder which is generated by a contact between the outputting section of the motor and the driven body. SOLUTION: On a driving face 9a of an outputting section 9 on an ultrasonic linear motor 1, a plurality of projections 14 which have a semicircular cross section are formed. These projections 14 are arranged in the driving direction (shown by the arrow) of the ultrasonic linear motor 1. By forming the projections 14, a recess 15 are formed on the driving face 9a. The recess 15 has capabilities to remove friction powder 12 generated by a contact between the projections 14 and the driven body 10. Owing to this structure, a contact state between the outputting section 9 of the ultrasonic linear motor 1 and the driven body 10 can be stabilized and thereby a power transmission efficiency can be increased. Furthermore, the recess 15 can prevent the friction powder 12 from being gathered and thereby a high transmission efficiency can be maintained for a long time. |
