Apparatus for noise reduction of tire of vehicle

An apparatus for noise reduction of a tire, the apparatus comprising:

• a housing mounted on an outer circumferential surface of a wheel rim, the tire being fitted over the wheel rim, and the housing having an inner space and formed so as to be open at an upper part of the housing;
• a resonant cover provided in the inner space of the housing and configured to close the upper part of the housing;
• and
• a resonance hole formed in the resonant cover to allow the inner space of the housing and an inside of the tire to communicate with each other so that the resonant cover controls pulsation via air entering and exiting through the resonance hole,
• wherein the housing has guide threads formed on an inner circumferential surface of the housing, and the resonant cover has corresponding threads formed on an outer circumferential surface of the resonant cover so as to correspond to the guide threads, and
• wherein the resonant cover comprises:
• a lower plate formed in a shape of a plate so as to close the inner space of the housing;
• an upper plate combined with the lower plate and arranged by being spaced apart upward from the lower plate at a predetermined distance, the upper plate having a through hole formed through a center of the upper plate;
• and
• a height adjustment device including:
• a bolt unit rotatably combined with the lower plate and exposed outside an upper surface of the upper plate through the through hole of the upper plate;
• and a slider part provided to be movable toward the bolt unit from the through hole of the upper plate, so that the height adjustment device allows the upper plate and the lower plate to rotate together during rotation of the bolt unit while the slider part comes into contact with the bolt unit.