Inflation valve for tyre rim with limitation of elastic deformation

Abstract

The invention relates to an inflation valve intended to be installed in an orifice of a wheel rim of a vehicle. The valve is of the elastic deformation type having a valve body (30) made of an elastomer material and a hollow rigid tube (40), and is characterised by comprising a device (70) able to be fixed on the hollow rigid tube (40) and having a portion (70a) allowing a rotational movement of the valve in a first direction of rotation when the inflation valve is mounted in a hole of the wheel rim and a portion (70b) preventing the rotational movement of the valve in a second direction of rotation opposite the first direction of rotation. The device thus formed acts as a means for limiting any elastic deformation of the valve.

Description

technical field [0001] The invention relates to an inflation valve intended to be placed in the hole of a tire rim of a motor vehicle, the valve being of the type with elastic deformation, the inflation valve having means for limiting the deformation of the elastic part of the valve, wherein such deformation Sealing defects of the valve during driving of the motor vehicle may result. The invention also relates to a tire rim for a motor vehicle and an assembly of such an inflation valve. Background technique [0002] Such a valve has a tubular core adapted to form an internal air passage from an external longitudinal end to an internal longitudinal end of the valve, the external and internal being considered relative to the internal and external of the rim passed by such a valve. The tubular core is at least partially surrounded by a sleeve made of elastically deformable material from the longitudinal central portion of the valve towards the inner longitudinal end. The slee...

AI Technical Summary

Problems solved by technology

In the first embodiment, where the cartridge is fixed on the valve by means of screws, the main disadvantage is that on the one hand a space of about 5 mm must be left between the rear of the valve and the cartridge in order to absorb the Displacement of a ball made of rubber and on the other hand the inability to mount the valve on an extended rim plate with a sheet thickness of 1 mm to an aluminum rim of 5 mm

[0020] The disadvantage of these devices is that they solve the problem of sealing during driving, but they are not suitable for valves equipped with electronic boxes for tire pressure monitoring systems

This increase in steps is unacceptable as it would take too much production time and there may be a risk of forgetting to place the device for limiting the action of centrifugal force after the tire has been assembled

Another disadvantage of this two-stage solution is that the electronic box cannot be held in place during this tightening operation since it cannot be accessed from inside the tire when the cap is tightened, and since the cap acts on the Due to the torque on the valve, it may be driven to rotate; this may lead to poor positioning of the electronic box, which will then be at an angle with respect to the nominal position, in which the electronic box must be installed to ensure its Radio frequency transmission of temperature and pressure data to tire pressure monitoring systems

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