| 摘要 |
A rotational device using gravity is provided to increase powerful rotational output, that is, torque in a machine such as an electric pressing device. A rotational shaft(1) has a plurality of fixture plates(2). The rotational shaft is supported lengthwise along a guide wall substance. The fixture plate includes first and second fixture plates(2a,2b). Rotational arms(3,3a) include a connection plate(4) and a rotational plate. The first and second fixture plates are fixed to the rotational shaft. Two coupling holes are formed at both sides of the first and second fixture plates. The rotational arms are hinged with the first and second fixing plates. The connection plate is connected to both sides of the rotational arms by using a pin(12). A spring of the rotational plate is linked with the fixture plate. A magnet of the rotational shaft is lifted and rotated by a magnetic field of the guide wall substance.
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