Central aeration rotary sealing mechanism of automobile tyre

The utility model relates to an central-charged rotating and hermetic mechanism for the automobile tire which comprises a air inlet guide sleeve and an end cap, wherein the air inlet guide sleeve is positioned in the charging passage at the center of the axle; a hermetical part is arranged between the outside surface of the air inlet guide case and the inside surface of the charging passage; the outside end of the air inlet guide case is connected to the end cap and a hermetical part is arranged therein; the end cap is provided with a gas source passage that communicates the gas source; the gas source passage communicates with the center of the air inlet guide case; and the end cap is arranged on the chassis part of the automobile. The utility model has simple structure, convenient installation and good hermetic performance, thereby thoroughly solving the problem of the rotation sealing in the air passage when the wheel conducts the rotation movement as the automobile is driving. Particularly, the air charging passage of the utility model is located at the axes of the axle, so that the linear velocity of rotation sealing between the air inlet guide case and the charging passage is greatly reduced, thereby increasing reliability of sealing therein and enabling the device to adjust the tire pressure at any time as the automobile is driving.