CN2085888U - Needle valve for air valve of bicycle - Google Patents

Abstract

The utility model discloses a needle valve for the air valve of a bicycle whose patent number is 88219434, 8. The utility model is in the matching use with a pump of automatic controlled pressure. The pin valve of the small rubber tube of the existing air valve for a tyre is replaced by the needle valve for air valve of bicycle which is composed of the pin valve body, pistons, and bottom pistons. The utility model is characterized in that the compressed air can flow into the tyre and not flow backwards that is controlled by a movable valve, and the opening of the movable valve is realized by that the contacting pressure which is realized by the top part of the movable valve is pressed by the air outlet of the pump depresses the movable valve, but not the pump air pressure from the air out. The utility model is suitable for not only the bicycle, but also all vehicles whose air valve of the tyre is provided with the pin valve of the small rubber tube.

Description

Needle valve for air valve of bicycle

The utility model belongs to the bicycle industrial technology, relates to a kind of bicycle tyre valve needle-valve.The utility model technology is that the patent No. is the supporting technology of 88219434,8 " automatic pressure-controlled inflator " technology, and it is a kind of and the novel valve of the bicycle tyre that adapts of the pressure control function of automatic pressure-controlled inflator.

Present domestic bicycle is widely used to be the tire valve of being furnished with cuticle bobbin valve.The existence of little leather hose makes tire internal air pressure and the going out of inflator in the process of inflating that certain difference be arranged between the atmospheric pressure.This pressure difference value is different because of the difference of cuticle thickness of pipe wall, and also the elasticity because of the cuticle tube wall is different, also can change because of the aging of little leather hose.The purpose of automatic pressure-controlled inflator is the air pressure in the control tire, and still, this control is indirect, and directly controlled is the atmospheric pressure that of inflator, by the purpose that atmospheric pressure reaches control tire internal air pressure that goes out of control inflator.So the existence of little leather hose just becomes a disturbing factor that is unfavorable for automatic pressure-controlled inflator performance function.In addition, the tire valve of Zhong Waihezi bicycles such as " Ou Baike " does not have little leather hose part in addition., its structural type can not cooperate with domestic widely used inflator outlet nozzle, so, can not utilize this technology to deal with problems.

The purpose of this utility model is to get rid of leather hose needle-valve disturbing factor, guarantees that the pressure control function performance of automatic pressure-controlled inflator is good.On the other hand, the structural type of this novel needle-valve and size can be harmonious with the assembly relation of domestic current bicycle tyre valve, again can be suitable fully with the structure and the size of the outlet nozzle of domestic current inflator.

The present techniques scheme is as follows: a needle-valve body is set, and its external shape structure and size are complementary with former valve.Its inside is provided with valve opening (through hole).A valve alive is set in the hole, and the valve of living moves axially in the hole, and it is that tightness cooperates with the valve shaped upper part.The bottom of valve opening is provided with bottom plug, blocks valve alive by bottom plug, makes it can not come off out, and the also sealing between booster injection valve body and the valve of bottom plug simultaneously can not leaked the inner pressure of tire air that contracts from the valve body avris.When piston is pressed to bottom plug by the air pressure of pump, the space appears between it and the valve body, and make the pressurized gas of pump enter tire through valve opening and bottom plug hole.Inflate after the end, the valve of living is pressed to valve opening top by the tire internal air pressure, and closely contacts with valve opening top, seals valve opening, prevents air pressure to leak.Forms such as that the valve of living can adopt is cylindric, coniform, frustum-like shape.Scheme is stepped truncated cone shape (valve opening is also for stepped accordingly) preferably, promptly strengthens tightness and has guaranteed the upper and lower directivity when mobile of valve alive again.When inflating for further eliminating, valve alive can be made the top of the valve of living than corresponding that section valve opening slightly longer (as 1-2mm) the interference of tire inner and outer air pressure difference.When airtight conditions, the valve top of living is promptly stretched out outside the valve opening a bit of.When inflating, be pressed to bottom plug by Air inflating valve, and open valve opening, pressing down with air pressure of the valve of living like this is irrelevant, does not disturb the level pressure automatic control.As valve and the bottom plug rigid body of living, then to guarantee tightness than high manufacturing accuracy.As adopting elastic components such as rubber or plastics, tightness is good simultaneously then can to lower processing request.

The utility model technology is not only applicable to bicycle, is suitable for the vehicle of pedicab, hand buggy and other use cuticle bobbin valve valve tire yet.It has overcome in original technology because of cuticle pipe tension force the poor of the pump pressure that causes and inner pressure of tire that differ, and the aging trouble that causes of leather hose, has solved match equipment for the use from the pressure control air-inflating tools simultaneously.

Now further specify with embodiment in conjunction with the accompanying drawings.

Fig. 1 is an example structure schematic representation;

Fig. 2 is another working state of this embodiment;

Fig. 3 is that itself and valve assemble schematic representation.

With reference to Fig. 1, Fig. 3, the external shape of needle-valve body ［ 1 ］ and physical dimension can be coordinated assembling (as shown in Figure 3) with former valve seat.Porose in the needle-valve body, rubber valve ［ 2 ］ alive is housed in the hole.When the valve ［ 2 ］ of living was in position shown in Figure 1, the valve of tire was sealed, and the pressurized air in the tire can not leak; When the valve ［ 2 ］ of living is in position shown in Figure 3, valve opening.Part ［ 3 ］ is a bottom plug in addition, two of its effects: the one, and do not allow valve alive ［ 2 ］ from needle-valve body ［ 1 ］, come off out; The 2nd, sealing prevents that tire inner high voltage air from letting out from the outside of valve body ［ 1 ］.As shown in Figure 3, novel needle-valve just is installed on the position of former cuticle bobbin valve, and the nut ［ 4 ］ of still using former valve is needle-valve fixedly.Be original valve part in addition, except that cuticle bobbin valve replaces with the novel needle-valve, all still keep.With reference to Fig. 2: when inflating, be not to rely on the air pressure of inflator air outlet to wash valve alive open, but the contact pressure at valve ［ 2 ］ top of living depressed the valve ［ 2 ］ of living, open valve by the outlet nozzle ［ 5 ］ of inflator with inflator.In Fig. 3 as seen, when inflating, the space in the outlet of inflator and the tire is directly to be communicated with, and pressurized air can freely flow into tire by the inflator outlet nozzle, it is consistent that air pressure in the tire just can reach with the air pressure of inflator air outlet, thereby the pressure control function performance that guarantees automatic pressure-controlled inflator is good.

Claims (5)

1, a kind of valve needle-valve is provided with valve opening in valve body, and valve body external shape and tire valve are complementary, it is characterized in that being provided with in valve valve alive, this work valve moves axially in the hole, and it is that tightness cooperates with the valve opening shaped upper part, valve body lower portion is equipped with bottom plug, has the hole on the bottom plug.

2,, it is characterized in that the valve opening and all stepped taper of valve of living according to the described valve needle-valve of claim 1.

3, according to claim 1 or 2 described valve needle-valves, the length of valve opening appropriate section slightly is longer than on the top of the valve that it is characterized in that living.

4, according to claim 1 or 2 described valve needle-valves, it is characterized in that living valve and bottom plug are the elastomer of rubber or plastics.

5, according to the described valve needle-valve of claim 3, it is characterized in that living valve and bottom plug are the elastomer of rubber or plastics.

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