Belt tension adjustment apparatus for vehicles

A belt tension adjustment apparatus for vehicles, comprising:

• a rotational shaft of a rotor;
• a first coupling pin and a second coupling pin protruding in a direction perpendicular to the rotational shaft;
• an outer pulley coupled to penetrate through the rotational shaft and having a first coupling part extending in a front direction, the first coupling part enclosing the rotational shaft and having a first slit formed to penetrate therethrough at a point corresponding to the first coupling pin, and the first slit having an arc shape which is convex in the front direction;
• and
• an inner pulley disposed between the rotor and the outer pulley, coupled to penetrate through the rotational shaft, and having a second coupling part extending in a rear direction, the second coupling part enclosing the rotational shaft and having a second slit formed to penetrate therethrough at a point corresponding to the second coupling pin, and the second slit having an arc shape which is convex in the rear direction.