| 主权项 |
1. A flow-bypassing structure of a grinding tool adapted for being assembled to a main body of the grinding tool, the main body having an intake passage and an exhaust passage, a cylinder disposed in an interior of the main body and having an air inlet and an air outlet, the air inlet communicated with the intake passage, the air outlet communicated with the exhaust passage, an airflow pathway defined to be communicated with the interior of the cylinder, the air outlet and the exhaust passage, a rotor being disposed in the cylinder, a rotational axle base rotatably disposed though the cylinder and in a rotational cooperative relationship with the rotor, an end of the rotational axle base extended and formed with a rotational working portion which is operable from an outside of the cylinder, the surroundings of the rotational working portion defining a space, an abutting ring neighboring the space abutted against the main body and the cylinder so as to fixedly position the cylinder in the main body, a flow-bypassing passage disposed through a side wall of the cylinder and communicated with the airflow pathway, an end of the flow-bypassing passage being open toward the abutting ring and a venting pathway disposed through the abutting ring and communicated with the space and the flow-bypassing passage. |
