A kind of automobile tire valve assembly

Abstract

The invention provides an automobile tire valve assembly, and belongs to the technical field of automobiles. The problem how to enable a tire to achieve overpressure exhaust and how to effectively ensure the sealing performance of the tire is solved. The valve assembly comprises a base, a shell sleeve, a core rod and a nut. A ventilation cavity is formed inside the shell sleeve; an upper conical sealing cavity and a lower conical sealing cavity are formed above and below the ventilation cavity respectively, the small ends of the upper sealing cavity and the lower sealing cavity are opposite, an upper sealing gasket is in sealing fit with the interior of the upper sealing cavity, an upper vent hole for being communicated with the external world is formed inside the upper sealing gasket, a lower sealing gasket is in sealing fit with the interior of the lower sealing cavity, and a lower vent hole for being communicated with a tire interior air cavity is formed inside the lower sealing gasket; the core rod is provided with an upper sealing part and a lower sealing part, the upper sealing part abuts against the lower end of the upper sealing gasket so that the upper vent hole can be sealed, and the lower sealing part abuts against the upper end of the lower sealing gasket so that the lower vent hole can be sealed. Due to the valve, the running safety of an automobile is ensured well, and the automobile can be more convenient to use.

Description

technical field [0001] The invention belongs to the technical field of automobiles and relates to an automobile tire valve assembly. Background technique [0002] The valve is a one-way valve installed on the wheel hub to inflate and deflate the tire. The air valves currently on the market can only be used to inflate and seal tires. When it is necessary to deflate, it is necessary to use a special key to unscrew the air needle or directly press the air valve stem to deflate. That is to say, the existing air valve cannot automatically open and release the pressure, and if the internal pressure of the tire is too high, there is a risk of tire blowout. [0003] For example, when a car is running at high speed, the tires of the car will be in contact with the ground and rotate along the ground at high speed. The gas pressure in the car tires will increase under the influence of high temperature. When the gas pressure increases to the maximum pressure value that the car tires ...

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Problems solved by technology

[0005] However, the above-mentioned pressure-regulating run-flat tire valve assembly has the following defects: in order to realize the function of automatic pressure relief, the core body needs to be designed to be movable, that is, a gap needs to appear on the sealing part of the core body in contact with the nozzle body during pressure relief In order to achieve exhaust, and the sealing design at this place should not be too tight, this will lead to sealing problems at the contact between the core and the nozzle in normal conditions, resulting in a decrease in the sealing performance of the tire

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