| 摘要 |
PURPOSE:To discharge a designated quantity of lubricating oil at a fixed period at need by providing a piezoelectric device on a piston in a lubricating oil container, and applying designated voltage to the piezoelectric device to move the piston by a very small amount. CONSTITUTION:Designated voltage is applied to a fixing electric element 21 to be displaced in the diametral direction, and the fixing piezoelectric element 21 is fixed in a lubricating oil container 10. Subsequently, designated pressure is applied to a main power piezoelectric element 22 to be displaced in the axial direction, whereby to press a piston pressing piezoelectric element 23 brought into contact with the main power piezoelectric element 22. Whereupon, a piston 11 brought into contact with the piston pressing piezoelectric element 23 moves by a very small amount. This movement causes grease 13 sealed in below the piston 11 to be discharged from a lubricating oil discharge port 15. |
