| 摘要 |
PROBLEM TO BE SOLVED: To simultaneously and sufficiently absorb both axial directional displacement and misalignment by forming an orbital plane of an inner ring in a cylindrical surface shape, forming an orbital plate of an outer ring in a spherical surface shape, and forming an axial directional central part in a cylindrical surface part and both end parts in a projecting curved surface part respectively of a roller interposed between both rings. SOLUTION: In an inner ring 1, an outside diameter surface is formed on an orbital plane of a cylindrical shape. In an outer ring 2, the almost whole of an inside diameter surface is formed as an orbital plane of a spherical surface shape. A roller 3 is formed in a barrel shape where an axial directional central part is formed in a cylindrical surface part 3a and both end parts are formed in a projecting curved surface part 3b, and is almost densely juxtaposed between these inner and outer rings 1 and 2. By this constitution, the automatic aligning action can be obtained by contact of the orbital plane of the outer ring 2 being a spehrical surface shape and the projecting curved surface part 3b of the roller 3, and misalignment γ of a shaft 6 with a housing is absorbed. Axial directional elongation by thermal expansion of the shaft 6 fixed to the inner ring 1 by contact of the inner ring 1 being a cylindrical surface shape and the cylindrical surface part 3a of the roller 3, can also be absorbed. |
