| 摘要 |
PURPOSE:To prevent seizure between a shaft and a bearing and make the high speed revolution of the shaft possible without lubrication by insertedly arranging a cylindrical body rotated through a reduction gear mechanism between the shaft end the bearing. CONSTITUTION:A cylindrical arm shaft bushing 1 having an internal gear 1a formed in a body at its one axial end is fixed to an arm 2, and a cylindrical shaft 14 having an external gear 14a formed in a body at its one axial end and corresponding to the internal gear 1a is formed in a body with a shaft 3. A cylindrical body 15 is insertedly arranged between the inner periphery of the bushing 1 and the periphery of the shaft 14 to keep slidable contact with them, and three pinions 16 are fixed at equal spaces at the one axial end of the cylindrical body 15 to compose a reduction gear mechanism. Thus FV value between the cylindrical body 15 and both the shaft 3 and the arm shaft bushing 1 decreases to make the high speed revolution of the shaft 3 and also the use of a bearing device without lubrication possible. |
