| 摘要 |
The invention concerns an external rotor engine fan comprising a central rotor-hub (1), a body (4), a closure element (2) consisting of a matching body (5) and a longitudinal pin mounted integral on the central rotor-hub (1). The two bodies (4, 5) have semi-circular openings (6) which define openings for connecting blades (3). A first body (4) is mounted integral on the central rotor-hub and the second body (5) can be connected to the first. The blades comprise a blade zone (10) and a low opposite cylindrical connecting zone (11) which is inserted in each opening. The connecting zone of the blade has a peripheral groove (12) which fits into the circumferential rim formed in each opening of the body. Each blade remains removably connected into the closure element assembly with angular adjustability. The two bodies (4, 5) have longitudinal orifices (8) arranged between the adjacent openings wherein are housed screws (9) which fix the bodies, so that the connecting zone of each blade is immobilized between said bodies.
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