| 摘要 |
PURPOSE:To prevent a metallic part from wearing, by positioning a piston attached to one end of rod, in a viscous fluid with the use of a belleville spring so that the viscous fluid absorbs slight vibration but allows gradual movements. CONSTITUTION:A piston 2 attached to one end of a rod 3 and disposed in a body 1 is positioned by a belleville spring 4, retractablly in the axial direction thereof and as well in an inclined direction within a certain range. Ring-like bellows 5 fitted between the body 1 and the piston 2 defines within the body 1 a closed space into which viscous fluid 6 is filled. Accordingly, a gradual displacement of the rod 3 is readily allowed, but a strong resistance like a certain rigidity is exhibited against vibration and abrupt displacement of the rod 3. |
