Electric traction motor for a vehicle, with a cooling device

An electric traction motor comprising:

• a motor shaft extending along a main axis between a first end and a second end;
• a rotor extending around the motor shaft and fixed to said motor shaft;
• a stator coupled to the rotor;
• and
• a motor frame fixed to the stator, the motor shaft being able to rotate relative to the motor frame around the main axis, the motor frame defining an inner compartment enclosing the rotor and stator, the first and second ends of the motor shaft being situated outside of the inner compartment;
• the motor shaft comprising:
• a main channel, extending along the main axis through the inner compartment, a first end of the main channel opening on the first end of the motor shaft, a second end of the main channel being situated in the second end of the motor shaft;
• and a plurality of secondary channels connected to the second end of the main channel and extending through the second end of the motor shaft;
• the electric traction motor being characterized in that it also comprises a fan attached to the second end of the motor shaft, so as to generate an air flux through the main channel and secondary channels, between the first and second ends of the motor shaft.