CN2252728Y

CN2252728Y - Tyre automatic inflator

Info

Publication number: CN2252728Y
Application number: CN 96205910
Authority: CN
Inventors: 李永乐
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-15
Filing date: 1996-02-15
Publication date: 1997-04-23
Anticipated expiration: 2006-02-15

Abstract

The utility model relates to a tyre automatic inflator which can keep bicycle tyres with certain pressure. In an air compression and output mechanism of a common tyre inflator, an air output one-way valve is arranged in a piston assembly; a piston rod is made into a hollow rod and sealed to extend into an inner tube, having the functions of a driving rod and an air output pipe. In the process that a vehicle travels, the reaction force which is given by the ground to a tyre directly drives the piston rod and a piston to compress air. When the air pressure of the tyre is reduced, compressed air in a cylinder can push off the one-way valve to replenish an inner tube with air through a passage of the piston rod. When the air pressure of the inner tube rises to a rated value, the one-way valve is closed, and the inflation process is completed.

Description

The automatic tonifying Qi tube of tire

The utility model relates to a kind of gas filled device that keeps bike tire's pressure.

At present, bike tire all uses manual pump to put on the air.Because manual pump is not easy to carry with car, make the vehicle user feel very much inconvenient.In addition, when just beating gas for tire, general tire is all inflated very sufficient, tire is followed the string, vehicle pitching; And land when too much when tyre pressure, the tire deliquescing is ridden very difficultly, influences speed.Tyre pressure is too low or too high, all causes the tire damage easily.

The purpose of this utility model provides a kind of automatic tonifying Qi tube of tire of small volume and less weight, and this tonifying Qi tube is installed on the wheel as vehicle accessory, makes tire air under steam let out mistake and is replenished automatically, keeps tire pressure.

The purpose of this utility model is achieved in that it is on the structural principle basis of common manual Floor Pump, the air output check valve is arranged in the piston component, piston rod is made hollow rod member and seal and stretch into the function of specially moving bar and air output pipe of holding concurrently in the inner tube of a tyre.In vehicle ', ground directly promotes piston rod and drives the Piston Compression air in the face of the antagonistic force of tire.When the air pressure in the cylinder compression chamber rises to can push check valve open the time, just enter check valve through the piston rod path to Tyre inflating.Cylinder also can be adjusted its axial location to change Tyre inflating pressure with the spring location in urceolus, have the automatic overload protection function simultaneously.When tire pressure was elevated to certain value gradually, piston stroke shortened to the air deficiency that compressed when pushing check valve open, and gas replenishment process promptly stops automatically.

Owing to adopt such scheme, not only can make the vehicle user save the trouble of often manually inflating, also, prevented all drawbacks when tyre pressure is too high and too low because tire pressure remains in the normal range.Owing to adopt minitype cylinder, replenish the whole small volume and less weight of tube.

The utility model is described in further detail below in conjunction with accompanying drawing.

Accompanying drawing is the vertical section structure schematic diagram of the utility model embodiment.

Among the figure 1, valve inside 2, pressure air nut 3, air inlet pipe 4, cylinder 5, check valve 6, piston 7, nut 8, O RunddichtringO 9, O RunddichtringO 10, cored screw 11, piston rod 12, overload protection spring 13, go up urceolus 14, urceolus 15, air inlet base 16, retracing spring 17, packing ring 18, carrier ring 19, screw 20, base 21, the inner tube of a tyre down

In the accompanying drawing, tonifying Qi tube base (20) is installed on the cored screw (10) by screw thread, and cored screw (10) is fixed on the wheel.Piston rod (11) passes cored screw (10) and enters the inner tube of a tyre (21), and under the application force of retracing spring (16) all the time with the outer side contacts of the inner tube of a tyre (21).The admission port of check valve (5) communicates with the compression chamber of cylinder (4), and exhausr port communicates with the admission port of piston rod (11), and the exhausr port of piston rod (11) communicates with the inner tube of a tyre (21).The upper end of cylinder (4) is by the elastic force location of overload protection spring (12), and the lower end leans against on the carrier ring (18).Piston (6) is installed on the shoulder of check valve (5), and fixing with nut (7) and packing ring (17).All adopt between air inlet pipe (3), air inlet base (15) and the cylinder (4) to be tightly connected, valve inside (1) and pressure air nut (2) adopt the standardized product of bicycle.O RunddichtringO (8), (9) are in order to guarantee the aeroseal of the inner tube of a tyre (21).Following urceolus (14) is connected with base (20) spot welding, and last urceolus (13) is threaded with following urceolus (14), and the relative position of adjusting upper and lower urceolus can change the pre-compression force of spring (12).Trimming screw (19), the upper-lower position that can change cylinder (4) by carrier ring (18) reaches the purpose that changes Tyre inflating pressure to change the volume of compression chamber.

The working process of tonifying Qi tube is such: when tire is crushed distortion, ground acts directly on the lower end of hollow piston bar (11) in the face of the application force of tire, piston rod (11) drives piston (6) pressurized air, compression chamber air pressure reaches in the time of pushing check valve open, and pressurized air enters check valve (5) and enters the inner tube of a tyre (21) through the inner chamber of piston rod (11).Time gas process is filled in the wheel repetition one of whenever circling, and inflates when enough when the inner tube of a tyre, and the tire flattening deformation reduces, and piston stroke reduces, and compression chamber air pressure reduces so that can not push check valve open, and gas replenishment process promptly finishes.

The principle of work of overload protection spring (12) is such: let out when interior air pressure and lose when serious; piston component will withstand the top of cylinder (4) under ground-surface application force; at this moment; ground-surface application force shrinks by cylinder (4) pressuring spring (12); so whole transmission compressing mechanism, has prevented the overload of transmission compressing mechanism effectively in company with in the spring (12) indentation urceolus together and has damaged.

The adjustment principle of Tyre inflating pressure is such: when trimming screw (19) upwards changes the position of cylinder (4), it is big that the compression chamber volume of cylinder (4) becomes, the compression stroke that must increase piston (6) just can obtain the pressurized air than anticyclonic pressure, and the specified inflation power of inner tube of a tyre this moment (21) will inevitably be lower; Otherwise when the position of cylinder (4) changed downwards, the compression chamber volume diminished, and the normal inflation of the inner tube of a tyre (21) will improve.

The effect of standby pump-up device is such: valve inside (1), pressure air nut (2) and air inlet pipe (3) constitute standby pump-up device.Let out when interior air pressure and to lose serious so that can not normally ride the time, can be tire with manual pump by standby pump-up device and put on the air.

This making-up air device will be noted following relevant issues when manufacturing and designing:

The gordian technique that the utility model manufactures and designs is the sealing of the inner tube of a tyre and the precision of cylinder, piston and piston ring, guarantee the air no leak of the inner tube of a tyre and reduce in the Piston Compression process leakage of air in the compression chamber as far as possible.

The principle of work of piston is a sample with common Floor Pump, but two interplanar gaps are more much smaller than common Floor Pump up and down for the U type groove on piston ring and the piston, about below 1 millimeter.

To carry out the strength check of piston rod during design.Mainly by the maximum functional load decision of spring (12), the minimum live load of spring (12) is promptly guaranteed can not be compressed at normal gas replenishment process medi-spring (12) by the maximum inflation pressure decision of the inner tube of a tyre stress condition of piston rod.Design will make during check valve when inflation the difference of the air pressure in the cylinder compression chamber and interior air pressure the smaller the better, otherwise inner tube of a tyre inflation pressure can be lower.

The section diameter of cylinder and compression chamber length are one of important parameters very, are directly connected to the force-bearing situation of piston rod and the inflation pressure height of the inner tube of a tyre, will conscientiously choose during design.

The diameter of bore of air inlet pipe (3) should be in 1 millimeter.

Cored screw (10) also can directly utilize the valve body of former bicycle to replace, but will redesign sealing arrangement this moment.

The utility model product weight is not more than 0.2 kilogram.

Claims

1, the automatic tonifying Qi tube of a kind of tire, in metal outer cylinder, piston component, piston rod, cylinder, air output pipeline constitute an air compression and output mechanism, it is characterized in that: the inside of piston component is a separate room valve, piston rod is a hollow rod member, and the air output pipeline is made up of this check valve and hollow piston bar.

2, the automatic tonifying Qi tube of tire according to claim 1, it is characterized in that: piston, check valve and after piston rod is captiveed joint, the admission port of check valve communicates with the cylinder compression chamber, and air extractor duct communicates with the admission port of piston rod, and the air extractor duct of piston rod communicates with the external world at the other end.