| 摘要 |
A rotation rod assembly (100) includes a fixed member (120) having a first annular body portion (122) fixedly secured to and extending axially therefrom and a second annular body portion (124) having an inner surface (126) defining a first bore (128) axially extending partially into the second annular body portion, the second annular body portion having a first axial end and second axial end, the first axial end being closed and the second axial end having an opening with a plug (134) adjustably secured therein, the plug having a second bore extending therethrough, the first linkage rod being fixedly secured to a frame. The rotation rod assembly includes a rotatable member (140) having a piston section (142) extending axially therefrom, the piston section being coaxial with the rotatable member and the plug, the piston section being disposed for rotation in the first bore, the inner surface surrounding the piston section, the linkage arm (144) extending through the second bore and rotatable relative to the plug (134), the piston section being axially restrained by the first end and the plug (134); the piston section having a first bushing (141) and a second bushing (143) secured to at least one outer surface of the piston section (142), the first bushing (141) and the second bushing (143) having a lubrication groove (141X, 141Y, 143X, 143 Y) formed in an axially and a radially outer surface thereof, at least one of the first bushing (141) and the second bushing (143) being in sliding engagement with portions of the inner surface, the first end and a portion of the plug; a barrier for preventing flow of the grease inside the piston section; and a flow path for conveying grease around the piston section, the flow path comprising a first radial circuit in the first bushing, a first axial circuit in the first bushing, a second axial circuit around a radial outer surface of the piston section, a third axial circuit in the second bushing, and a second radial circuit in the second bushing. |
