CN217784324U

CN217784324U - Air leakage-proof valve of inner tube of bicycle

Info

Publication number: CN217784324U
Application number: CN202222644965.7U
Authority: CN
Inventors: 李建武; 张培宾; 马洪涛
Original assignee: Kunming Yunren Tire Manufacturing Co ltd
Current assignee: Kunming Yunren Tire Manufacturing Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2022-11-11
Anticipated expiration: 2032-10-09

Abstract

The application discloses an air leakage-proof bicycle inner tube valve, which comprises a valve tube, wherein the valve tube is of a straight-tube structure, the outer surface of the valve tube is provided with threads, and one end of the valve tube is coaxially fixed with a butting ring; still including sealed cushion, sealed cushion middle part is equipped with the through-hole that the diameter is less than the butt ring, and the butt ring is fixed embedded in the through-hole of sealed cushion, and butt ring bottom surface is not higher than the surface of sealed cushion. This application inlays fixed sealed cushion outward on the butt ring of air cock pipe one end, thereby regard as the bridge with inner tube of a tyre wall connection with sealed cushion, can avoid current butt ring and inner tube of a tyre inner wall to cause the problem of the easy gas leakage of the out-of-position of installation because of the contact surface is little, also can avoid the rim spot facing work burr of wheel rim easily to pierce the problem of the inner tube of a tyre, can also improve the reliability of air cock pipe and inner tube of a tyre connection, show the fatigue life who improves the junction, thereby solve the easy difficult problem of leaking gas in current bicycle inner tube of a tyre inflating valve production and the use, and has simple structure, connect reliably, characteristics with low costs.

Description

Air leakage-proof valve of inner tube of bicycle

Technical Field

The application relates to the technical field of bicycle inner tubes, in particular to an air leakage prevention bicycle inner tube valve with simple structure, reliable connection and low cost.

Background

The inner tube is commonly called inner tube, is a circular ring elastic tube for maintaining the inner pressure of the tire and having a valve for inflation and vibration reduction, and is widely used for inner cavities of tires of trucks, motorcycles, bicycles, rickshaws and the like.

The valve is a device which is a separate valve body and opens to allow air to enter a tubeless tire (tube tire) or tube space and then automatically closes and seals the air to generate air pressure to prevent the air from escaping the tire or tube. In addition to solid tires, other tires or tubes that must be inflated require the use of such devices.

At present, an inner tire valve tube of a conventional bicycle is a straight cylindrical round tube, a butt ring is arranged at the bottom end of the valve tube, the butt ring of the valve tube is directly inserted into a valve hole of an inner tire during manufacturing, and then the butt ring is directly bonded or vulcanized with the inner wall of the inner tire to form sealing connection. Because the abutting ring needs to be inserted into the air nozzle hole, the diameter of the abutting ring cannot be too large compared with the air nozzle hole, so that the contact area between the abutting ring and the inner wall of the inner tube cannot be too large, and the inner tube is scrapped due to poor sealing of the local edge after connection if the centering is out of tolerance when the abutting ring is connected with the inner tube, so that the operation difficulty and the cost of production are increased; and the smaller contact area can also cause the connection position to shake repeatedly in the using process, so that the stress concentration at the connection position is caused, fatigue cracking is easy to generate, and slow air leakage is caused, thereby influencing the service life of the inner tube. In addition, when the tire rim is used, the air nozzle pipe of the inner tire directly penetrates through the rim hole on the rim, so that part of the inner tire is in direct contact with the rim hole, and the processing burrs of the rim hole are easy to pierce the inner tire to cause air leakage due to the limited tire wall thickness of the inner tire.

In the prior art, in order to solve the problem that an inner tube is easily pierced by processing burrs of a rim hole, a gasket is sleeved on an air nozzle pipe outside the inner tube to isolate the inner tube from the rim hole by the gasket, so that the inner tube is prevented from being pierced, but the problem that poor sealing is easily caused in the connection of the inner tube and the air nozzle pipe is difficult to solve, and the problem that fatigue cracking is easily caused is difficult to solve. Therefore, on the basis of the above, the diameter of the abutting ring is increased or the rubber pad is fixed at the bottom of the abutting ring, and then the air nozzle tube is directly bonded outside the air nozzle hole of the inner tube through the abutting ring or the rubber pad, so that the abutting ring or the rubber pad isolates the inner tube from the rim hole to avoid the piercing of burrs, and the contact area with the inner tube can be increased to avoid the problems of poor sealing and easy fatigue cracking; however, because the butting ring or the rubber pad is positioned in the inner hole of the rim with smooth transition, the inner tube under pressure support has sudden stress change at the rim hole, repeated stress alternation in the using process easily causes fatigue cracking at the joint of the butting ring or the rubber pad and the wall of the inner tube, slow air leakage occurs, and the service life of the inner tube is influenced.

SUMMERY OF THE UTILITY MODEL

To the not enough among the prior art, this application provides a simple structure, connect reliable, with low costs bicycle inner tube valve of leak protection gas.

The application is realized as follows: the air nozzle comprises an air nozzle pipe, wherein the air nozzle pipe is of a straight cylinder structure, the outer surface of the air nozzle pipe is provided with threads, and one end of the air nozzle pipe is coaxially and fixedly provided with a butting ring; still including sealed cushion, sealed cushion middle part is provided with the through-hole that the diameter is less than the butt ring, the fixed embedded of butt ring is in sealed cushion's through-hole, the bottom surface of butt ring is not higher than sealed cushion's surface.

The beneficial effect of this application:

1. according to the air valve, the sealing rubber pad is embedded and fixed on the abutting ring at one end of the air valve pipe, so that the sealing rubber pad is used as a bridge for connecting the abutting ring and the inner wall of the inner tube, the problem that the existing abutting ring and the inner wall of the inner tube cannot be installed at a proper position due to small contact surface and are easy to leak air can be solved, and the operation difficulty and the production cost for connecting the inner tube and the air valve pipe can be obviously reduced; the stress at the joint of the inner wall and the sealing rubber pad in the using process of the inner tube can be effectively reduced, so that the fatigue life of the joint is obviously prolonged; the problem that burrs of rim holes of the rim easily pierce the inner tube can be avoided, so that the connection reliability of the valve tube and the inner tube can be improved, and the problem that air easily leaks in the production and use processes of the valve of the conventional bicycle inner tube is effectively solved.

2. The abutting ring is fixedly embedded in the through hole of the sealing rubber pad, and the embedded fixing structure can make full use of the elasticity of the sealing rubber pad to enable the abutting ring to be tightly attached to the sealing rubber pad, so that the connection reliability is improved; and the bottom surface of the butt ring is not higher than the surface of the sealing rubber mat, so that the problem that the inner wall of the inner tube is scratched due to the fact that the rigid butt ring abrades the inner wall in the air-free storage and transportation processes of the inner tube can be avoided, and the reliability of the inner tube is further improved.

3. The utility model provides a sealed cushion sets up in the inside of inner tube, consequently can make the inner tube of a tyre under the pressure support directly laminate in glossy wheel rim hole to avoid the inner tube of a tyre to appear stress mutation in rim hole department and easily lead to the fatigue fracture of junction and the problem of leaking gas slowly, thereby can improve the life of inner tube of a tyre.

Therefore, the connecting device has the characteristics of simple structure, reliable connection and low cost.

Drawings

FIG. 1 is a schematic perspective view of the present application;

FIG. 2 is one of the schematic views of an axially cut-away structure as used herein;

FIG. 3 is a second schematic view of an axially cut-away configuration as used herein;

in the figure: 1-air nozzle pipe, 2-screw thread, 3-abutting ring, 301-inner pillow block, 302-outer pillow block, 4-sealing rubber gasket, 5-through hole, 6-inner tube, 7-air nozzle hole, 8-fastening nut, 9-sealing gasket ring, 901-ring groove, 10-groove and 11-wheel rim.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1 to 3, the air nozzle comprises an air nozzle tube 1, wherein the air nozzle tube 1 is of a straight cylinder structure, the outer surface of the air nozzle tube is provided with threads 2, and one end of the air nozzle tube 1 is coaxially and fixedly provided with a butting ring 3; still including sealed cushion 4, sealed cushion 4 middle part is provided with the through-hole 5 that the diameter is less than the

butt ring

3, 3 fixed inlays in the through-hole 5 of sealed cushion 4 of butt ring, the bottom surface of butt ring 3 is not higher than the surface of sealed cushion 4.

The butt joint ring 3 is a convex ring structure with one flat bottom end and the other end being a stepped shaft, and the diameter of the through hole 5 is not less than the inner shaft platform 301 of the stepped shaft of the butt joint ring 3 and less than the outer shaft platform 302 of the stepped shaft of the butt joint ring 3.

The end surface of the inner axial platform 301 and/or the outer axial platform 302 facing the air nozzle pipe 1 is an inclined surface or an arc surface structure adaptive to the radian of a rim.

The surface of outer platform 302 of 3 step shafts on butt ring and the excircle face of interior platform 301 are provided with reticulation, sandblast rough surface or turning line, sealed cushion 4 is through vulcanizing or sticky and butt ring 3 fixed connection.

The air nozzle pipe 1 is a metal pipe or a plastic pipe, and the butting ring 3 and the air nozzle pipe 1 are integrally or welded and adhesively connected.

The sealing rubber pad 4 is a soft sealing rubber pad which is the same as or similar to the inner tube 6 in material.

The sealing rubber pad 4 is circular and has a diameter larger than the diameter of the air nozzle hole 7 of the inner tube 6, and the sealing rubber pad 4 is vulcanized or adhesively fixed with the inner wall of the inner tube 6.

The sealing rubber mat 4 is an equal-thickness rubber mat or a non-equal-thickness soft rubber mat which becomes thinner gradually from the through hole 5 in the middle to the edge, and the maximum thickness of the sealing rubber mat 4 is not more than the wall thickness of the inner tube 6.

The air nozzle comprises an air nozzle pipe 1 and is characterized in that a fastening nut 8 is arranged on a thread 2 of the air nozzle pipe 1, a sealing gasket ring 9 is sleeved between a sealing rubber gasket 4 and the fastening nut 8 on the air nozzle pipe 1, and the outer diameter of the sealing gasket ring 9 is larger than that of a through hole 5.

The sealing gasket ring 9 is of an O-shaped or cylindrical structure, the inner diameter of the sealing gasket ring is equivalent to the pitch diameter of the thread 2, and an inwards concave ring groove 901 is circumferentially arranged on the outer circular surface of the sealing gasket ring 9 of the cylindrical structure. The ring groove 901 can guide the gasket ring 9 to form a middle part collapse under the pressing of the fastening nut 8, so that the inner hole of the gasket ring 9 is tightly attached to the thread 2 to form a seal.

The end face of one end of the air nozzle pipe 1, which is far away from the butting ring 3, is provided with a straight or cross-shaped groove 10.

The manufacturing and using processes of the application are as follows:

as shown in fig. 1 and 3, during manufacturing, the abutting ring 3 is pressed into the through hole 5 of the rubber sealing pad 4 and fixed (if necessary, a layer of adhesive is coated on the surface of the outer boss 302 of the abutting ring 3 and the outer circular surface of the inner boss 301), then a layer of adhesive is coated on the surface of the rubber sealing pad 4 facing the air nozzle tube 1, then the rubber sealing pad 4 at the bottom of the air nozzle tube 1 is pinched flat and placed into the tube of the inner tube 6 from the punched air nozzle hole 7, then the rubber sealing pad 4 is bonded with the inner wall of the tube of the inner tube 6, and finally the tube is placed into a mold for high-temperature vulcanization and fixation, so that the rubber sealing pad 4 and the inner wall of the tube of the inner tube 6 are integrated into a whole, and the vulcanized inner tube 6 is subjected to appearance finishing to complete the installation and fixation of the air valve of the inner tube.

When the tire is used, the inner tube 6 is placed into the outer tire, the air nozzle tube 1 extends out of a rim hole of the rim 11, then the valve core is placed into the air nozzle tube 1, meanwhile, the sealing gasket ring 9 and the fastening nut 8 are sleeved on the air nozzle tube 1, the fastening nut 8 is screwed to press the sealing gasket ring 9 to deform, the inner tube 6 with the sealing rubber gasket 4 can be pressed against the inner wall of the rim 11 to prevent shaking in use, the deformed sealing gasket ring 9 can seal a gap between the air nozzle tube 1 and the rim hole, the air tightness between the air nozzle tube 1 and the rim 11 is ensured, and secondary sealing can be formed by slow air leakage of the inner tire 6; and then, inflating the inner tube 6 to rated air pressure, and finally installing a dustproof cap on the inflating valve to finish the inflating valve installation of the inner tube 6.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application are included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An air leakage preventing bicycle inner tube valve comprises a valve tube (1), wherein the valve tube (1) is of a straight-tube structure, the outer surface of the valve tube is provided with threads (2), and one end of the valve tube (1) is coaxially and fixedly provided with a butting ring (3); the sealing rubber gasket is characterized by further comprising a sealing rubber gasket (4), wherein a through hole (5) with the diameter smaller than that of the abutting ring (3) is formed in the middle of the sealing rubber gasket (4), the abutting ring (3) is fixedly embedded in the through hole (5) of the sealing rubber gasket (4), and the bottom surface of the abutting ring (3) is not higher than the surface of the sealing rubber gasket (4).

2. Air leakage preventing valve inside tube of bicycle according to claim 1, characterized in that the abutting ring (3) is a convex ring structure with one flat end and the other end being a step shaft, the diameter of the through hole (5) is not smaller than the inner platform (301) of the step shaft of the abutting ring (3) and smaller than the outer platform (302) of the step shaft of the abutting ring (3).

3. Air leakage preventing valve of inner tube of bicycle according to claim 2, characterized in that the end surface of inner platform (301) and/or outer platform (302) facing to the valve tube (1) is a slope or a cambered surface structure adapted to the radian of the rim.

4. The air leakage preventing valve inside the tube of a bicycle according to claim 2, wherein the surface of the outer platform (302) of the step shaft of the abutting ring (3) and the outer circular surface of the inner platform (301) are provided with reticulate patterns, sand blasting rough surfaces or turning lines, and the sealing rubber gasket (4) is fixedly connected with the abutting ring (3) through vulcanization or gluing.

5. Air leakage prevention valve for inner tube of bicycle tyre according to any of claims 1 to 4, characterized in that the sealing rubber pad (4) is circular and has a diameter larger than the diameter of the air valve hole (7) of the inner tube (6), and the sealing rubber pad (4) is vulcanized or adhesively fixed with the inner wall of the inner tube (6).

6. The air leakage preventing bicycle inner tube valve according to claim 5, characterized in that the sealing rubber gasket (4) is an equal thickness rubber gasket or a non-equal thickness soft rubber gasket gradually thinned from the through hole (5) in the middle to the edge, and the maximum thickness of the sealing rubber gasket (4) is not more than the wall thickness of the inner tube (6).

7. The air leakage preventing bicycle inner tube valve of claim 5, characterized in that a fastening nut (8) is arranged on the thread (2) of the valve tube (1), a gasket ring (9) is sleeved on the valve tube (1) between the sealing rubber gasket (4) and the fastening nut (8), and the outer diameter of the gasket ring (9) is larger than the through hole (5).

8. Air leakage prevention valve for inner tube of bicycle tyre according to claim 7, characterized in that the gasket ring (9) is of O-shaped or cylindrical structure and has an inner diameter corresponding to the pitch diameter of the thread (2), and the outer circular surface of the gasket ring (9) of cylindrical structure is circumferentially provided with an inward concave ring groove (901).

9. Air leakage prevention valve of a bicycle inner tube according to claim 5, characterized in that the end face of the valve tube (1) far away from the butting ring (3) is provided with a groove (10) shaped like a Chinese character 'yi' or 'ten'.