| 摘要 |
An eddy current type brake system comprises a rotor (4) mounted on an shaft connected to an engine, a permanent magnet (6) movable relative to the rotor (4) and a casing (9) provided between the rotor (4) and the permanent magnet (6) for sealingly housing the permanent magnet (6). The permanent magnet (6) applies a brake force to the rotor (4) when the permanent magnet (6) approaches the rotor (4) since an eddy current flows in the rotor (4) upon approaching whereas the brake force is not applied to the rotor (4) as the permanent magnet (6) leaves the rotor (4) since the eddy current no longer flows in the rotor (4) upon leaving. The permanent magnet (6) is sealedly housed in the casing (9) Therefore, moisture and dusts do not deteriorate the characteristics of the magnet (6). In addition, heat produced upon approaching of the magnet (6) to the rotor (4) is absorbed by the casing (9) located between the rotor (4) and the magnet (6). |
