A tool grinding machine, comprising:
- a casing, provided for operating the tool grinding machine in a gripping manner, and formed with at least one air inlet and at least one first air outlet, wherein an interior of the casing is divided into a motor space and a grinding space separated from the motor space, and wherein the casing is divided into a head for gripping and a body, and the casing comprises a manipulation pressing plate assembled on the body, and at least one second air outlet;
- a driving component, installed in the casing, and comprising a motor and an airflow generator that rotating synchronously with the motor, wherein the motor comprises a stator, a rotor, an output shaft assembled with the rotor, a motor housing disposed around the stator and the rotor, and an airtight support ring assembled with the motor housing, and wherein the output shaft comprises a first end facing the casing and assembled with the airflow generator, and a second end opposite from the casing and assembled with a grinding member, and wherein the motor housing comprises at least one first opening generating a ventilation relationship with the at least one air inlet, at least one second opening communicating with an interior of the motor and facing the airflow generator, and a protruding rib formed on a bottom edge of the motor housing and in contact with an inner wall of the casing, and the protruding rib is assembled with the airtight support ring to divide the interior of the casing into the motor space and the grinding space which are not in communication with each other,
- a diversion structure, being a baffle disposed on the motor housing, the baffle configured to prevent an airflow from flowing directly from the air inlet to the at least one first air outlet without passing through the at least one first opening;
- and
- a deflector, disposed in the casing and located at a junction of the head and the body, and the deflector comprising an air guiding part facing the body, wherein the air guiding part comprises a main guide surface and two auxiliary guide surfaces respectively connected to two sides of the main guide surface;
- wherein the tool grinding machine defines a first airflow path and a second airflow path, wherein the first airflow path only performs in the motor space, and is composed of the at least one air inlet, the at least one first opening, the interior of the motor, the at least one second opening, the airflow generator and the at least one first air outlet in sequence, and wherein the second airflow path is defined by the deflector, and is composed of the at least one air inlet, the at least one first opening, the interior of the motor, the at least one second opening, the airflow generator and the at least one second air outlet in sequence.