CN86204790U

CN86204790U - Pressure-maintaining inner tyre

Info

Publication number: CN86204790U
Application number: CN 86204790
Authority: CN
Inventors: 何先成
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-07-03
Filing date: 1986-07-03
Publication date: 1987-09-09

Abstract

The utility model discloses a pressure-maintaining inner tyre which can make an air pump automatically pump the air by making use of the distortion generated by the insufficient tyre pressure. As long as an inner tyre is not pierced, the tyre need not additionally pump the air all the time. Even when an autoinflation part is damaged, the normal method can be used for pumping the air and use. When the tyre pressure normally leaks to below 3 kg/cm+[2] owing to reasons, such as vehicles parking, a pump in the travel can automatically carry out the inflation, and the rated pressure can be recovered via about 4-6 km. The pressure-maintaining inner tyre is especially suitable for light-duty tyres used by bicycles, motorcycle, and vehicles. The utility model has the advantages of long service life and simple structure, so the favorable driving performance can be ensured, the maintenance and pumping the air work can be decreased, and the appearance of the entire vehicle can not be influenced.

Description

Pressure-maintaining inner tyre

Pressure preventive inner tyre is to utilize automatic inflation mode to keep the required pressure of tire, to improve tire service life, guarantees 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 to reach far away 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 sees the cam-piston apparatus that is applied on the bicycle.The advantage of this self-filler is that gas chamber volume is relatively large, and required action frequency is few, but it needs to fix onboard separately, volume is bigger, influences the car load outward appearance, makes car load seem comparatively complicated, relate to special installation parts and the technology of a cover, price is more expensive comparatively speaking.Above reason has limited popularizing and using of this self-filler.

The utility model-Pressure preventive inner tyre is that the distortion that produces when utilizing low tyre 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.Simultaneously, because it is simple in structure, cost is low, and whole tire profile is constant substantially, and tissue is special easily produces, easy for installation, will be easy to popularize in application.

Pressure preventive inner tyre (seeing figure) is assembled into one by the automatic charging valve mouth and the local inner tube of a tyre of strengthening (20).Automatically the charging valve mouth is similar to conventional tire tube valve in appearance, by valve spud (6), and piston (8), piston bush (7), overcoat (9), air inlet valve body (12), air inlet valve pull back spring (15), seal ring (17), start spring compositions such as (3).When inner pressure of tire descends, in the rotation, grounded parts produces distortion, by the part of the thickening on the inner tube of a tyre (1), pad (2) compressing start spring (3), make piston stroking upward, pressurized air is washed rubber tubing (18) (exhaust check valve) open through the piston internal channel, enters the inner tube of a tyre through the groove of piston lower guide on step again.After the tire grounded parts was crossed this place, piston was resetted by retracing spring (16), produced negative pressure at compression chamber simultaneously, from the air inlet valve aspirated air, in order to the usefulness of next stroke.

Following characteristics are structurally arranged: 1. start spring (3) is fixed length, and promptly after the squeegee action reduction, softer retracing spring can make piston reset smoothly.2. utilize pad (2) to contact, guarantee the life-span of the inner tube of a tyre with inner tube of a tyre thickening part (1).3. when squeegee action part deflection surpasses piston stroke, can continue to compress the start spring, not contact with the hard of the inner tube of a tyre and do not form the portion of stretching under the piston.4. when inner pressure of tire reaches certain value, will with the compression chamber equilibrium of pressure, make piston stroking upward a certain amount of automatically, like this, piston and start spring are in released state, to prolong the service life of self-filler.5. unit of plastic (10) is for when piston reaches top dead point, and the usefulness of packed space is to guarantee to have enough compression ratios.

Embodiment: the pressurize tire that is used for bicycle.For ease of assembling, automatic charging valve mouth is divided into two parts.Parts 1: by valve spud (6), start spring (3), pad (2), nut (5), packing ring (4), pin hoop (19) is formed, and valve spud to φ 6, is clipped bayonet socket partly with the reaming of former bicycle tube valve spud, pours out the sealing angle.Nut (5) and packing ring (4) are all used former bicycle tube part, and start spring (3) diameter phi 5.8 with pad (2) spot welding, fixes as one.

Inner tube of a tyre thickening projection is partly bonding by hand.

Will with the valve spud of packing into of the start spring after the pad combination, pack into the worked-out inner tube of a tyre (20) more together, with packing ring (4), nut (5) is fastening.

Parts 2: by piston bush (7), piston (8), India rubber tube (18) (bicycle air tube emulsion tube), unit of plastic (10), retracing spring (16), overcoat (9), central authorities are provided with the packing seal (11) in hole, air inlet valve body (12), air inlet valve (14), air inlet valve pull back spring (15), seal ring compositions such as (13) is assembled into one as figure.

The inner tube of a tyre, cover tire, steel ring by the usual method assembling, add pin hoop (19) (part on the former cycle tyre) fastening after, load onto parts 2, assembling is finished.

Diameter of piston is selected φ 12mm for use, stroke 6mm, and volume is about 0.678mL.

After giving the tire install by the conventional method aerating, can use, 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 4-6KM that travels just can recover rated pressure.

Claims

A kind of Pressure preventive inner tyre, this Pressure preventive inner tyre are by automatic charging valve mouth, and the inner tube of a tyre (20) and start spring (3) are formed, and valve spud (6) is housed on the inner tube of a tyre (20), and by packing ring (4) and nut (5) valve spud (6) is fixed on the inner tube of a tyre (20); An end that it is characterized in that start spring (3) is connected with pad (2), thickening on pad (2) and the inner tube of a tyre (20) partly (1) contacts, the other end of start spring (3) contacts with the piston that central aisle is arranged (8) that guide rod and piston crown are connected as a single entity, at the middle part of piston (8) India rubber tube (18) is housed, and the unit of plastic (10) that two ends have cross bath is equipped with in the inboard of retracing spring (16) in this piston crown endoporus, be connected with piston bush (7) in valve spud (6) upper end by engage thread, seal by packing seal (11) between piston bush (7) and the overcoat (9), seal ring (17) is equipped with on the top of outer garden of the head of piston (8) and valve spud (6), described piston (8) head endoporus is equipped with retracing spring (16), the other end of retracing spring (16) contacts with packing seal (11), overcoat (9) is housed on the outside thread of piston bush (7), air inlet valve pull back spring (15) is positioned at the endoporus lower end, top of overcoat (9), air inlet valve (14) is equipped with in the upper end of described spring (15), air inlet valve body (12) adopts with overcoat (9) and is threaded, and seal ring (13) is positioned at the narrow slit place that overcoat (9) upper end is connected with air inlet valve body (12).