Radiator fan

A radiator fan for cooling a radiator, comprising:

• a rotation member that rotates due to rotation of an engine;
• a plurality of blade members disposed around a peripheral surface of the rotation member in such a way that angles of surfaces of the plurality of blade members that receive air are variable;
• a plurality of shafts that fixes the plurality of blade members to the peripheral surface of the rotation member so as to be rotatable;
• a movement member, disposed in the rotation member, that moves toward the peripheral surface of the rotation member due to a centrifugal force generated by rotation of the rotation member;
• and
• a coupling member that is directly coupled to the plurality of blade members, independent of the plurality of shafts, and coupled to the movement member, the coupling member directly transmitting a movement of the movement member to the plurality of blade members independent of the plurality of shafts, and changes the angles of the surfaces of the plurality of blade members,
• wherein the coupling member comprises:
• a first coupling member that has a ring shape and is directly coupled to the plurality of blade members by extending through the plurality of blade members;
• and
• a second coupling member that has a bar-like shape, is coupled to the movement member and the first coupling member, and transmits the movement of the movement member to the first coupling member to rotate the first coupling member relative to the rotation member.