Pressure preventive inner tyre
Pressure preventive inner tyre is to utilize automatic inflation mode to keep the required pressure of tire, to improve tire service life, keeps the rideability of vehicle, reduces a kind of novel inner tube of a tyre of safeguarding and exempting aerating work.Pressure preventive inner tyre is specially adapted to the employed light tyres of vehicle such as bicycle, three-wheel vehicle, motor bike.
What use in recoverable amount maximum and the daily productive life at present, still is inflatable tire.What now occurred does not need gas filed band tyre also not reach to popularize realistic scale or extensively infiltrate sphere of life; The tire of special construction is separated the semi-gas filled formula Polyurethane material inner tube of a tyre etc. as inner chamber, also because of its complex structure, and high and technologic former thereby same difficult the popularizing of cost.The existing automatic inflation type inner tube of a tyre, see the cam that is applied on the bicycle--piston apparatus, the advantage of this self-filler is that gas chamber volume is relatively large, required action frequency is few, but it needs to fix onboard separately, volume is bigger, influences the car load outward appearance, and price is more expensive comparatively speaking.Above reason has limited popularizing and using of this self-filler.Number of patent application is 86204790 Pressure preventive inner tyre, still has the structure relative complex.Valve spud, piston, piston bush require working accuracy higher, and the assembling concentricity is difficult to guarantee.Automatically charging valve mouth volume is too little, and the compression space that exists on the technology is bigger, is difficult to actv. pump gas.Owing to be the all-metal member, as the use of the inner tubes of a tyre such as bicycle, can not require lubricated grade for technical service, easy to wear; Retracing spring is unreliable, and the start spring worsens work, influences the life-span etc., is difficult to form practical product.
The utility model remains the distortion that produces when utilizing low tyre and makes the air pump action, as long as under the situation that the inner tube of a tyre is not punctured, can put on the air automatically in the process of moving by actv.; Even under the situation that automatically inflation partly damages, still aerating and do not destroy the normal use of tire according to a conventional method, and can adjust the required pressure of tire as required.Simultaneously, it is simple in structure, and cost is low, and whole tire external form is constant, and tissue is special easily produces, easy for installation, is easy to popularize.
Pressure preventive inner tyre (seeing accompanying drawing) from appearance with conventional inner tube of a tyre indifference almost, be to be assembled by the inner tube of a tyre (18) that is contained in special rubber air pump of inner tube of a tyre in-to-in and local thickening.Described special rubber air pump is by the rubber pump housing (22), tank top plate (2), Outer Bottom Plating (3), pump rod (19), pressing plate (20), nut (4), sebific duct (5), air inlet valve body (12), spring (14), air inlet spool (15), seal ring (13), valve cap formations such as (10).Bead coil (21) on the rubber pump housing (22) bears the difference of pressure of negative pressure in the interior pressure of the inner tube of a tyre (18) when air-breathing and the pump, the air pressure during pump gas in the bearing pump.Sebific duct (5) plays the effect of exhaust check valve, and seal ring (6) is to make sealing between pump rod (19) and the valve spud (9).Be processed with screw rod below the tank top plate (2) partly, be connected with the inner tube of a tyre by the coupling nut (1) who is embedded in the inner tube of a tyre thickening part (23).When inner pressure of tire decline, in the rotation, the tire grounded parts produces distortion, and the compressing rubber pump housing (22) is up, and pressurized air is washed sebific duct (5) open and entered in the tire.After tire was crossed this place, interior compressing makes partly (23) recovery of inner tube of a tyre thickening, makes the rubber pump housing (22) reliable reset near 360 ° of scopes, and was simultaneously air-breathing, in order to the usefulness of next stroke.In the use,, can adjust required different interior pressure by the stop nut (11) on the pump rod (19).
Embodiment: the Pressure preventive inner tyre that is used for bicycle.Put the rubber pump housing (22) inside and outside the bead coil of different size (21) divided, install tank top plate (2), Outer Bottom Plating (3) from the opening of the rubber pump housing (22) two ends corresponding size, pump rod (19), pressing plate (20), nut (4) puts sebific duct (5), dress seal ring (6), the above-mentioned part that the assembles inner tube of a tyre of packing into, the screw rod on the tank top plate (2) is screwed in coupling nut (1), then then, dress valve spud (9) is with packing ring (7).Nut (17) is fastening.After the tire of packing into, screw pin hoop (8), screw on stop nut (11), add seal ring (13), the air inlet valve of packing into uses valve cap (10) fixing at last, and assembling is finished.Can use after giving the tire install by the conventional method aerating.When internal drop can be depressed to tire under the situation of 3-4mm, pump begins automatically to inner tube of a tyre inflation, and about 2-4KM that travels just can recover rated pressure.Owing to used the rubber air pump, in the use, removed the piston pump maintenance such as lubricated grade of needs usually from.
The about 2.7cm of elastomeric pump volume
3, the about 6MM of stroke.