CN101737294A - Inflator of racing bicycle - Google Patents
Inflator of racing bicycle Download PDFInfo
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- CN101737294A CN101737294A CN201010005121A CN201010005121A CN101737294A CN 101737294 A CN101737294 A CN 101737294A CN 201010005121 A CN201010005121 A CN 201010005121A CN 201010005121 A CN201010005121 A CN 201010005121A CN 101737294 A CN101737294 A CN 101737294A
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- air
- push rod
- inflator
- interior pipe
- outer tube
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Abstract
The invention discloses an inflator of a racing bicycle, which comprises an outer pipe (6), an inner pipe (7) and a push rod (8), wherein the outer pipe (6) is sleeved on the inner pipe (7), and the inner pipe (7) is sleeved on the push rod (8); the upper end of the outer pipe (6) is movably sealed with the inner pipe (7), an end cover (1) is fixed at the lower end of the outer pipe (6), and an air sucking check valve (2) is arranged on the end cover (1); the upper end of the inner pipe (7) is provided with an air inlet check valve (12), and an outer piston (3) is fixed at the lower end of the inner pipe (7); an outer seal ring (5) is arranged on the outer piston (3), and the outer piston end of the inner pipe (7) is provided with a small hole (15); and an inner piston (11) is fixed at the upper end of the push rod (8), an outer seal ring (10) is arranged on the inner piston (11), the lower end of the push rod (8) is fixed on the end cover (1), and the outer piston (3) is movably sealed with the push rod (8). By adopting the structure, the invention has the advantages of compact structure, convenient carrying, portable inflation, high pressure, meeting of inflating requirement of various racing bicycles, and the like.
Description
Technical field
The invention relates to a kind of mini inflating pump, particularly a kind of hand-pushing mini inflating pump.
Background technique
Liu Tong bicycle use mini inflating pump has plain edition, binodal type, bidirection air intake type, high low pressure adjustment type and high pressure type in the market, considers air pressure and tolerance factor, and the maximum pipe bore of common mini inflator is 20 to 25mm.Under the prerequisite of identical thrust (12.6kg), more than the air of various mini inflating pumps all only through once compression, calculate inner gas pressure by theory and be roughly 0.26-0.4MPa (p=F/S).Binodal type mini inflating pump has just increased aeration quantity than plain edition mini inflating pump.Bidirection air intake type mini inflating pump has special piston, inflator is pushed away or Inflator can both be inflated.High low pressure adjustment type mini inflating pump is equivalent to the simple combination of the common inflator of two different tube diameters, and two compression chambers are worked simultaneously during the low pressure shelves; When transferring to the high pressure shelves, have only the compression chamber work of tubule (about the 20mm of aperture), tolerance is less, can reach higher air pressure, about 0.4MPa.More than a few class inflators because the moment air output that inflator will fight to the finish is not smooth, the resistance of inflating can increase suddenly, air " obstruction " phenomenon occurs, the actual highpressure that reaches has only the 60-80% of theoretical value under normal thrust.The high pressure type mini inflating pump is provided with air storing cavity, and the delivery air circulation has clear improvement, and output pressure is more steady, can reach theoretical pressure, i.e. 0.26-0.4MPa basically.Above-mentioned inflator can only be applicable to that ordinary bicycle uses (the about 0.15MPa of tyre pressure).
Using all kinds of mini inflating pump advantages at present is that volume is little, easy to carry with car, shortcoming is that high-grade its air pressure of all kinds of bicycle racings is not all reached requirement, press interrelated data, the tire of racing cycle generally need keep 0.5-0.7MPa air pressure, the tire of track cycle preferably injects 1-1.2MPa air pressure, and the tire of mountain bike generally needs 0.70.9MPa air pressure.Reach requirement even caliber is done little air pressure, tolerance is too small can not be practical.Also be not suitable for the mini inflating pump that racing car is used at present both at home and abroad.For this reason, many manufacturers and knowledgeable people research and develop at the problems referred to above, but so far as yet not comparatively ideal product emerge.
Summary of the invention
In order to overcome the problems referred to above that existing mini inflating pump exists, the purpose of the invention provide a kind of simple and compact for structure, uses is easy to carry, air pressure is high, can satisfy the inflator of racing bicycle of all kinds of bicycle racing inflation pressures requirements.
The invention solves the technological scheme that its technical problem adopts, and it comprises outer tube, interior pipe, push rod, and outer tube sleeve is established on inner pipe, and interior pipe box is located on the push rod; The upper end of described outer tube and interior pipe moving seal, the lower end of outer tube is fixed with end cap, and end cap is provided with breather cheek valve; The upper end of interior pipe is provided with breather check valve, and the lower end of interior pipe is fixed with outer piston, the exterior seal ring that outer piston is provided with descending time sealing, communicates when up, the aperture that is interlinked to the outside in the outer piston end of interior pipe is provided with; The upper end of push rod is fixed with inner carrier, the exterior seal ring that inner carrier is provided with up time sealing, communicates when descending, and the lower end of push rod is fixed on the end cap, outer piston and push rod motive sealing.
The further scheme of the invention, the outer tube space of described outer piston below constitutes air aspiration cavity, and the interior tube space of the outer tube space of outer piston top and inner carrier below constitutes adapter cavity jointly, and the interior tube space of inner carrier top constitutes air-inlet cavity.
The further scheme of the invention, the upper end of described outer tube is provided with the inner seal ring with interior pipe moving seal.
The further scheme of the invention, described outer piston is provided with the inner seal ring with the push rod motive sealing.
The further scheme of the invention, described interior pipe upper end is connected with charging air inlet.
The further scheme of the invention, described charging air inlet is provided with barometer.
After adopting said structure, the invention has following advantage and effect: the one, be provided with two pistons in the pump, three times of air compressions are finished in the action of inflating of once drawing, pushing away, normally inflate and to export pressurized gas about 1.2MPa, all kinds of bicycle racings of particularly suitable use, and also are applicable to the inflation of common tire.The 2nd, in equal air inflow, get under the prerequisite of same nominal pressure, the maximum thrust of inflating has only about 1/3 to 1/4 of common inflator; Otherwise under identical maximum thrust, the inflation pressure of inflator of racing bicycle can reach 3-4 times of common inflator, has the characteristics laborsaving, that air pressure is high, economical and practical.
Description of drawings
Fig. 1 is the structural representation of the invention.
Structural representation when Fig. 2 pulls out for the invention.
Structural representation when Fig. 3 advances for the invention.
Force analysis schematic representation when Fig. 4 advances for the invention.
Force analysis schematic representation when Fig. 5 pulls out for the invention.
Embodiment
Fig. 1, Fig. 2 and shown in Figure 3 are the specific embodiments of the invention inflator of racing bicycle, and it comprises outer tube 6, interior pipe 7, push rod 8, and on the pipe 7, interior pipe 7 was set on the push rod 8 in outer tube 6 was set in; The upper end of described outer tube 6 is provided with inner seal ring 9 and by inner seal ring 9 and interior pipe 7 motive sealings, guarantees sealing between outer tube 6 and the interior pipe 7, and the lower end of outer tube 6 is fixed with end cap 1, and end cap 1 is provided with breather cheek valve 2; In pipe 7 upper end be provided with breather check valve 12, the lower end of interior pipe 7 is fixed with outer piston 3, the exterior seal ring 5 that outer piston 3 is provided with sealing when descending, communicates when up, the aperture 15 that is interlinked to the outside in the outer piston end of interior pipe 7 is provided with; The upper end of push rod 8 is fixed with inner carrier 11, the exterior seal ring 10 that inner carrier 11 is provided with up time sealing, communicates when descending, the lower end of push rod 8 is fixed on the end cap 1, and outer piston 3 is provided with inner seal ring 4 and by inner seal ring 4 and push rod 8 motive sealings, guarantees sealing between push rod 8 and the outer piston 3.Outer tube 6 spaces of described outer piston 3 belows constitute air aspiration cavity A, and outer tube 6 spaces of outer piston 3 tops and interior pipe 7 spaces of inner carrier 11 belows constitute adapter cavity B jointly, and interior pipe 7 spaces of inner carrier 11 tops constitute air-inlet cavity C.Interior pipe 7 upper ends are passed through tracheae or directly are connected with charging air inlet 14, observe inflation pressure for convenience, on the charging air inlet 14 barometer 13 can also be installed.Breather cheek valve 2 comprises that air flue and the straight trough on the end face on the taper hole of end cap 1 straight hole and straight hole lower end and intake duct, ball, the push rod 8 form complete one-way valve in the present embodiment, push rod 8 and one-way valve are become one, the cover part of breather cheek valve 2 be can reduce, processing, installation procedure saved; When ball contacts closely with the taper hole of end cap 1, closed check valve, when ball when contacting with push rod 8 end faces, it is unimpeded that one-way valve keeps, straight trough and the air flue of air on intake duct, taper hole, straight hole and push rod 8 end faces of end cap 1 communicates with air aspiration cavity A; Certainly, breather cheek valve 2 also can have other multiple structure, as using cone rubber body, thin rubber sheet, O type circle, leather cup etc.The breather check valve 12 of present embodiment mainly is made up of ball and little spring, can certainly use cone rubber body, thin rubber sheet etc. to replace constituting one-way valve.
The working procedure of the invention is as follows, when the pump tension, and air aspiration cavity A suck air, adapter cavity B pressurized air is also imported among the air-inlet cavity C.Specifically: when outer tube 6 is drawn out, exterior seal ring 5 in outer piston 3 grooves is subjected to pressure difference and frictional force double influence between adapter cavity B and the air aspiration cavity A, the following formation sealing state of being close to outer tube 6 inwalls and groove, air aspiration cavity A forms negative pressure, move valve open on the ball of breather cheek valve 2, air outside enters air aspiration cavity A.Also because the exterior seal ring 5 in big piston 3 grooves forms sealing states, adapter cavity B volume when pulling out reduces adapter cavity B, the air the chamber in by compression, the pressure increase.Meanwhile, breather check valve 12 is subjected to the influence of tyre pressure to be in closed condition, exterior seal ring 10 in inner carrier 11 grooves is subjected to move on the pressure difference and frictional force double influence between adapter cavity B and the air-inlet cavity C, exterior seal ring 10 blow-by, be in communicating state between adapter cavity B and the air-inlet cavity C, the air among the adapter cavity B is just imported in the air-inlet cavity C.When outer tube pulled down on earth, it is maximum that air aspiration cavity A, air-inlet cavity C reach, and it is minimum that adapter cavity B then becomes, and the air of adapter cavity B almost all enters air-inlet cavity C, as shown in Figure 2.
When pump was boosted on earth, air aspiration cavity A pressurized air was also imported adapter cavity B, and air-inlet cavity C pressurized air is also imported in the tire.Specifically: during outer tube 6 stressed boosting, air aspiration cavity A volume reduces pressurized air, the chamber internal air pressure increases, impel the ball of breather cheek valve 2 to move down and conical surface seal, breather cheek valve 2 is closed, and at this moment the exterior seal ring 5 in outer piston 3 grooves is subjected to move exterior seal ring 5 blow-by on the pressure difference and frictional force double influence between air aspiration cavity A and the adapter cavity B, be in communicating state between air aspiration cavity A and the adapter cavity B, air aspiration cavity A pressurized air is also imported among the adapter cavity B.Meanwhile, air-inlet cavity C volume also reduces pressurized air, and the exterior seal ring 10 in inner carrier 11 grooves is subjected to that the double influence of pressure difference and frictional force moves down between air-inlet cavity C and the adapter cavity B, the following formation sealing state of pipe 7 inwalls and groove in exterior seal ring 10 is close to.Air pressure in the air-inlet cavity C improves constantly, and during air pressure in pressure surpasses tire, removes on the ball of breather check valve 12 and opens, and the high-pressure air in the air-inlet cavity C is inflated tire, as shown in Figure 3.More than be the inflate process of the air pressure in tire when higher.
Also have a kind of special circumstances, when the low situation of tyre pressure, even during the inflator tension, as long as the high-pressure air in the air-inlet cavity C is than the air pressure height in the tire, breather check valve 12 will be opened, and the high-pressure air in the air-inlet cavity C will be inflated tire.At this moment, outer tube pushes away inflation constantly, also inflates when outer tube is pulled out.
Further specify the advantage of the invention below in conjunction with gross data, referring to
The force analysis schematic representation of Fig. 4 and Fig. 5.
Specified air pressure P of the present invention
Volume=1.2MPa supposes stroke 10cm, the push rod outside diameter d
1=0.79cm, inner tube diameter d
2=1cm, interior external diameter of pipe d
3=1.6cm, outer tube diameter d
4=2.3cm, outer tube diameter d=2.7cm, P
0Be external atmosphere pressure, get P
0=0.1MPa.
1. calculate the maximum volume of each compression chamber:
V
A=36.6cm
3, i.e. the full admission amount of inflator;
V
B＝24.4cm
3；
V
C＝7.85cm
3。
2. calculate the maximum gas pressure of each compression chamber:
According to aerodynamics, to calculate for convenient, the influence of temperature microlitre and other details then have P when not considering to inflate
1* V
1=P
2* V
2
Air compression is that inflator is pushed away for the first time, P during air aspiration cavity A pressurized air input adapter cavity B
A=P
B, then have:
P
Amax＝P
Bmin＝P
0V
A/V
B＝0.1×36.6÷24.4＝0.15MPa
Air compression is the inflator tension for the second time, P when adapter cavity B pressurized air enters air-inlet cavity C
B=P
C, then have:
P
Amax＝P
Cmin＝P
BminV
B/V
C＝0.15×24.4÷7.85＝0.466MPa
Air compression is that inflator is pushed away for the third time, Pc=P when air-inlet cavity C pressurized air enters tire
Tire=P
Volume, consider that specified air pressure is relative barometric pressure:
P
Cmax=P
Volume+ P
0=1.2+0.1=1.3MPa.
3. calculating sectional area: establish S
1, S
2, S
3, S
4, S is corresponding diameter d
1, d
2, d
3, d
4, d area, then:
S
1＝0.49cm
2 S
2＝0.785cm
2
S
3＝2.01cm
2 S
4＝4.15cm
2
S＝5.73cm
2
4. calculate maximum thrust and pulling force:
Referring to Fig. 4, only consider the axially loaded of outer tube assembly portion, at this moment P
A=P
B, P
C=P
Tire, then have:
F
0 time=P
0S; F
On 0=P
0(S-S
3);
F
A＝P
A(S
4-S
1)； F
B1＝P
A(S
4-S
3)；
F
B2＝P
A(S
2-S
1)； F
C＝P
CS
2；
The thrust of inflator: F
Push away=F
A+ F
C+ F
On 0-(F
0 time+ F
B1+ F
B2) substitution and simplify after, the maximum thrust of inflator is:
F
Push away max=P
Amax(S
3-S
2)+P
CmaxS
2-P
0S
3
＝0.15×(2.01-0.785)+1.3×0.785-0.1×2.01
＝10(kg)
Referring to Fig. 5, only consider the axially loaded of outer tube assembly portion, at this moment P
A=P
0, P
B=P
CThen have:
F
0 time=P
0S; F
On 0=P
0(S-S
3);
F
A＝P
0(S
4-S
1)；?F
B1＝P
B(S
4-S
3)；
F
B2＝P
B(S
2-S
1)；F
C＝P
BS
2；
The pulling force of inflator: F
Draw=F
0 time+ F
B1+ F
B2-(F
A+ F
C+ F
On 0)
After substitution and the simplification, the maximum pull of inflator is:
F
Draw maX=(P
Bmax-P
0) (S
4-S
3-S
1)
＝(0.466-0.1)×(4.15-2.01-0.49)
＝6(kg)
5. the contrast of common pump is calculated
Contrast common pump, suppose that air inflow is identical, promptly common pump ips is 2.16cm, and stroke is 10cm, at this moment sectional area (S
General=3.66cm
2) all identical with stroke, air inflow is also identical.At this moment inflate the maximum gas pressure value that can reach with identical maximum thrust:
P
General max=F
Push away max/ S
General=10 ÷ 3.66=0.273 (MPa)
Far below highpressure value of the present invention, differ 3.66 times.
6. air when inflator is got to maximum gas pressure " obstruction " phenomenon is explored
The present invention is owing to distance between three air compression chambeies is very near, and can there be gas " obstruction " phenomenon in preceding secondary compression.
If when air-inlet cavity C is compressed to H length, the air pressure of air-inlet cavity C will and begin air inlet above the tire internal air pressure.Then have:
P
CminV
C＝P
CmaxS
2H
H＝P
CminV
C/(P
CmaxS
2)＝0.466×7.85÷(1.3×0.785)＝3.58cm
Illustrate that the air of air-inlet cavity C had begun to enter tire when inflator was got in addition the 3.58cm stroke, the air of air-inlet cavity C constantly enters tire when continuing to inflate, and how the chamber internal air pressure has raise hardly, air " obstruction " phenomenon can not occur.
Contrast common pump, stamp 1.2MPa air pressure with 10kg power, ips has only 1cm, and theoretical intake stroke also has only 0.83cm, though air inflow is very little, air " obstruction " phenomenon also can occur.
Claims (6)
1. an inflator of racing bicycle comprises outer tube (6), interior pipe (7), push rod (8), and outer tube (6) is set on the interior pipe (7), and interior pipe (7) is set on the push rod (8); It is characterized in that: the upper end of described outer tube (6) and interior pipe (7) motive sealing, the lower end of outer tube (6) is fixed with end cap (1), and end cap (1) is provided with breather cheek valve (2); The upper end of interior pipe (7) is provided with breather check valve (12), the lower end of interior pipe (7) is fixed with outer piston (3), the exterior seal ring (5) that outer piston (3) is provided with descending time sealing, communicates when up, the aperture (15) that is interlinked to the outside in the outer piston end of interior pipe (7) is provided with; The upper end of push rod (8) is fixed with inner carrier (11), the exterior seal ring (10) that inner carrier (11) is provided with up time sealing, communicates when descending, and the lower end of push rod (8) is fixed on the end cap (1), outer piston (3) and push rod (8) motive sealing.
2. inflator of racing bicycle according to claim 1, it is characterized in that: outer tube (6) space of described outer piston (3) below constitutes air aspiration cavity (A), interior pipe (7) space of outer tube (6) space of outer piston (3) top and inner carrier (11) below constitutes adapter cavity (B) jointly, and interior pipe (7) space of inner carrier (11) top constitutes air-inlet cavity (C).
3. inflator of racing bicycle according to claim 1 and 2 is characterized in that: the upper end of described outer tube (6) is provided with the inner seal ring (9) with interior pipe (7) motive sealing.
4. inflator of racing bicycle according to claim 3 is characterized in that: described outer piston (3) is provided with the inner seal ring (4) with push rod (9) motive sealing.
5. inflator of racing bicycle according to claim 4 is characterized in that: pipe (7) upper end is connected with charging air inlet (14) in described.
6. inflator of racing bicycle according to claim 5 is characterized in that: described charging air inlet (14) is provided with barometer (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100051217A CN101737294B (en) | 2010-01-16 | 2010-01-16 | Inflator of racing bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100051217A CN101737294B (en) | 2010-01-16 | 2010-01-16 | Inflator of racing bicycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101737294A true CN101737294A (en) | 2010-06-16 |
| CN101737294B CN101737294B (en) | 2012-06-13 |
Family
ID=42461207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010100051217A Expired - Fee Related CN101737294B (en) | 2010-01-16 | 2010-01-16 | Inflator of racing bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101737294B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014166259A1 (en) * | 2013-04-09 | 2014-10-16 | 北京康斯特仪表科技股份有限公司 | Fold-back coaxial gas booster pump and gas pressure creating method |
| CN105387338A (en) * | 2014-08-22 | 2016-03-09 | 黄英哲 | Inflating device capable of inflating by hand or connecting with gas cylinder |
| DE102020203402B4 (en) | 2019-03-20 | 2024-03-07 | Beto Engineering and Marketing Co., Ltd. | Hand air pump inflator |
| DE102020203395B4 (en) | 2019-03-20 | 2024-03-14 | Beto Engineering and Marketing Co., Ltd. | Air pump |
-
2010
- 2010-01-16 CN CN2010100051217A patent/CN101737294B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014166259A1 (en) * | 2013-04-09 | 2014-10-16 | 北京康斯特仪表科技股份有限公司 | Fold-back coaxial gas booster pump and gas pressure creating method |
| CN103233876B (en) * | 2013-04-09 | 2015-11-18 | 北京康斯特仪表科技股份有限公司 | Returning type coaxial gas suction booster and gas make pressure method |
| US10197053B2 (en) | 2013-04-09 | 2019-02-05 | Beijing Const Instrument Technology Inc. | Turn-back coaxial gas pressurizing pump and gas pressurizing method |
| CN105387338A (en) * | 2014-08-22 | 2016-03-09 | 黄英哲 | Inflating device capable of inflating by hand or connecting with gas cylinder |
| DE102020203402B4 (en) | 2019-03-20 | 2024-03-07 | Beto Engineering and Marketing Co., Ltd. | Hand air pump inflator |
| DE102020203395B4 (en) | 2019-03-20 | 2024-03-14 | Beto Engineering and Marketing Co., Ltd. | Air pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101737294B (en) | 2012-06-13 |
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Granted publication date: 20120613 Termination date: 20130116 |
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