| 摘要 |
Two cylindrical bodies (1, 2) can be rotated relative to each other about their coaxial axes. One body (1) includes two permanent magnets (21, 22) with their two poles (N, S) exposed to the other body. The pole surface corresponds to a circle sector, wherewith the magnets together fill the circular end surface of said body (1). The other body (2) includes a number of axially through-passing pole shoes corresponding to the number of magnets and the cross-sectional shape of the pole shoes corresponding to the cross-sectional shape of the magnets. Both of said bodies are mounted for rotation relative to each other with the aid of an axial ball bearing (40) at their respective outer circumference. |
