| 摘要 |
A high specific power two-stage turbo type rotor for a low vibration air tool is provided to reduce the weight of the air tool and increase torque, by using a turbine rather than a vane and avoiding friction between a cylinder and the rotor. A rotor shaft(31) for rotating a grinder support(38) is arranged between an upper cover(27) and a lower cover(28) covering a rotating unit. An upper blade(29) is arranged on a turbine rotor(34), and a lower blade(30) is arranged beneath the turbine rotor so as to transmit torques to the rotor shaft for rotating the grinder support. The upper cover and the lower cover have return flow channels(25) for introducing high pressure air to the lower blade, and the lower blade of the turbine rotor is rotated by air blowing.
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