A multifunctional external valve and a method for installing a loading device for the valve

Abstract

The present invention provides a method for installing a multifunctional external tire valve and a loading device, wherein the valve body is provided with a main body that is through-through in three directions, and the main body is penetrated from the side by the side connecting portion; the side connecting portion is used to connect the loading device; a valve core is provided in the axial center hole, and a cavity is provided at the front of the axial center hole of the main body for connecting with the original tire valve; an outer conical surface is provided at the front of the valve core, and the front part of the core including the outer conical surface protrudes from the front end of the main body cavity; a core conical surface sealing hose is installed on the outer conical surface of the core for sealing the core with the conical hole sealing surface of the inner hole core cavity of the tire valve. The present invention can avoid the problems of previous external valves, effectively prevent tire pressure leakage, and at the same time, can make the loading structure closer to the axis of the valve, thereby improving dynamic balancing performance.

Description

Technical Field

[0001] The present invention relates to the field of air valves. Background Art

[0002] When using automobiles (especially commercial vehicles), tire pressure gauges are often installed on the original tire valve stems to measure tire pressure. Figure 1 ), sensors that monitor tire pressure ( Figure 2 )、Cap-type external sensor ( Figure 3 )、Tire automatic inflation device ( Figure 4 )、Inflatable extension tube( Figure 5 ) etc. Currently these loading devices (such as Figure 1 、 Figure 2 ) is equipped with a welded external valve, or (such as Figures 3 to 5 ) is directly installed on the tire valve mouth. The external valve mouth is directly connected to the original tire valve mouth. Figure 1-6 In the figure, A1 represents the functional device of the load, such as a barometer, sensor, etc.; A2 represents the valve core in the external valve stem; A3 is the welding part, A4 is the rubber flat pad built into the external load, and A5 is the ejector rod built into the external load.

[0003] In the above structure, the connection between the external valve and the original tire valve is to open the valve core of the original tire valve by the external push rod A5 ( Figure 6 ), so that the tire air source is passed into the loading part, which will cause obvious failure ( Figure 6 First, the original tire valve core cavity conical surface B1 is abandoned as the primary sealing function, relying solely on the valve mouth and the rubber gasket A4 built into the external loader for sealing. The valve core's sealing principle relies on the valve core's PTFE pressure-resistant sealing ring to combine with the conical surface within the valve core cavity to effectively prevent tire pressure leakage. However, relying solely on the valve mouth for sealing can easily lead to chronic tire pressure leakage due to the machining shape and roughness of the mouth and the permanent compression deformation of the rubber gasket. Second, the spring within the valve core is subjected to extreme compression for a long time, causing yielding and rendering the valve core's check valve inoperative.

[0004] In short, after the above-mentioned loading parts are connected to the valve stem, the valve core is in a normally open state (the sealing function of the defined sealing cone of the valve stem is abandoned). This results in defects such as failure of the valve stem sealing function and inconvenience in operation.

[0005] Furthermore, currently, external valves are single-use, with a single loading function, inconvenient charging and deflation, and poor applicability. Most connections require welding, which is a complex process and has poor reliability. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a multifunctional external tire valve that can avoid the problems of conventional external tire valves and effectively prevent tire pressure leakage. To this end, the present invention adopts the following technical solutions:

[0007] A multifunctional external air valve, comprising a valve body, characterized in that the valve body is provided with a three-way penetrating main body, the main body being provided with an axial central hole and a central side connecting portion, and the side connecting portion penetrating the main body from the side; the side connecting portion is used to connect to a loading device;

[0008] A valve core is arranged in the axial center hole, and a valve core body is arranged on the valve core;

[0009] A cavity is provided in front of the axial center hole of the main body, and the cavity is provided with an internal thread for connecting with the original tire valve;

[0010] An outer conical surface is provided at the front of the core body, and the front part of the core body including the outer conical surface protrudes from the front end of the main body cavity. The core body conical surface sealing hose is installed on the outer conical surface of the core body to seal the core body with the conical hole sealing surface of the inner hole of the tire valve stem. The core body is provided with an axial through hole;

[0011] The end of the main body is processed and formed according to the core cavity and thread size of the valve and the valve core is installed.

[0012] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or combine and apply these further technical solutions:

[0013] The side connection portion is a connection hole or a threaded connection column. The opening of the connection hole is provided with a sealing ring groove, and the threaded connection column is provided with a through hole to penetrate the axial center hole from the side.

[0014] The main body cavity includes an inner cylindrical part; the valve core is installed in the core seat, the core seat is installed in the inner cylindrical position of the main body cavity with interference fit, and the core is installed in the core seat.

[0015] The external valve is provided with a core sealing ring, which is installed in the core sealing ring slot to achieve sealing of the core tail.

[0016] The rear part of the core body is provided with a main cylinder and a clamping part, which are used to cooperate with the core seat to fix the core body on the main body. The front part of the main cylinder is provided with a transition section, which forms an installation channel for the sealing ring after the core body is assembled; the core seat is provided with an inner cylindrical surface, which forms a clearance fit with the main cylinder of the core body for mutual rotation; the outer conical surface of the core body is provided at the front end of the transition section.

[0017] A minimum cylindrical end is provided at the front end of the outer conical surface of the core body. The outer cone formed by the outer conical surface of the core body has a small diameter end and a large diameter end, and an annular groove is provided at the large diameter end of the outer cone body.

[0018] The "O"-shaped sealing ring is installed at the step position at the front end of the inner cylinder in the main body cavity to achieve secondary sealing between the original tire valve mouth and the external valve mouth; after the core seat is installed, its front end is basically flush with the step.

[0019] Another technical problem to be solved by the present invention is to provide a method for installing a loading device of a valve. To this end, the present invention adopts the following technical solutions:

[0020] A method for installing a loading device for a valve stem, characterized in that the valve core of an original tire valve stem is removed, and the external thread of the original tire valve stem is connected to the internal thread of the hole cavity of any one of the above-mentioned multifunctional external valve stems, and the core body utilizes the length of the transition section so that the front end of the core body and the part where the core body conical surface sealing hose is set can be inserted into the position where the valve core of the original tire valve stem was originally set, and the core body conical surface sealing hose can be abutted against the conical hole sealing surface of the valve stem core cavity; thereby achieving the prototype sealing effect of the external valve stem and the original tire valve stem.

[0021] The loading device includes a tire pressure gauge, a sensor for monitoring tire pressure, a cap-type external sensor, an automatic tire inflation device, and an inflation extension tube.

[0022] Automobile tire (and rim) valves are accessories installed according to standards, and their functions are to inflate (or liquid), deflate, and seal tires. Loading an external valve on the original tire valve is used to carry functions such as a pressure gauge, a tire pressure and temperature monitoring sensor, a tire automatic air-filling device, an air-filling extension tube, etc. in order to increase the convenience of inflation and deflation, maintaining tire pressure, monitoring tire pressure, temperature, and other functions. The external valve of the present invention can utilize the end core assembly to meet the sealing and self-sealing of the external valve to the sealing cone surface of the original valve core cavity, effectively preventing tire pressure leakage. At the same time, the multifunctional external three-way valve of the present invention can meet the requirements of carrying different functional parts such as connectors, pressure gauges, sensors, automatic air-filling devices, etc., fully realizing functional diversity. The interfaces in two directions facilitate the filling and outflow of gas (or liquid) from two directions. At the same time, it can make the loading structure closer to the axis of the valve, thereby improving dynamic balancing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figures 1 to 5 This is a cross-sectional view of an existing external valve nozzle loaded with different functional devices.

[0024] Figure 6 This is a schematic diagram of the connection between the existing external tire valve and the original tire valve.

[0025] Figure 7 This is a cross-sectional view of Example 1 of the present invention.

[0026] Figure 8This is a cross-sectional view of Example 2 of the present invention.

[0027] Figure 9 Schematic diagram of the core of Example 1 of the present invention.

[0028] Figure 10 This is an exploded view of Example 2 of the present invention.

[0029] Figure 11 Schematic diagram of the connection between Example 2 of the present invention and the original tire valve.

[0030] Figure 12 This is a cross-sectional view of Example 3 of the present invention.

[0031] Figure 13 This is a cross-sectional view of Example 4 of the present invention. DETAILED DESCRIPTION

[0032] Example 1, reference Figure 7 、 9 , and also refer to Figure 10 、 11 .

[0033] The external valve provided in this embodiment includes a three-way through main body 1, and the side of the main body 1 is provided with a connecting hole 11 with metric thread (or NPT sealing pipe thread) and a sealing ring groove 12 (for connecting to the carrier). The sealing ring groove 12 is located at the orifice of the connecting hole 11, and the depth of the groove is 1 to 1.5 mm.

[0034] The connecting hole 11 is provided in the middle of the main body 1. The wall thickness of the main body 1 at the position corresponding to the connecting hole 11 is greater than the wall thickness of the main body at the cavity 13 described below and is also greater than the wall thickness of the main body at the valve core 200 described below. And the inner diameter of the main body 1 at the position corresponding to the connecting hole 11 is smaller than the inner diameter of the cavity 13 described below. During installation, the TPMS sensor assembly 400 and other loading parts are threadedly connected and installed on the side connecting hole 11 of the main body 1, and sealed with an "O"-ring 8 and locked with thread sealant 9 (other loading parts are connected in the same way). This avoids a series of processing and inspection processes such as welding the sensor seat to the external valve, installing the sensor, and performing spinning processing to fix it. Moreover, the loading parts are brought closer to the axis of the external valve, thereby improving the dynamic balancing performance.

[0035] A cavity 13 is provided at the front end of the main body 1 , and an 8V1 internal thread 14 is provided in the cavity 13 for connecting with the original tire valve 100 . Specifically, the internal thread 14 is threadedly connected to the external thread 101 of the original tire valve 100 .

[0036] A valve core 3 is set at the front end of the external valve nozzle, the core 3 is installed in the core seat 4, and the core sealing ring 5 is installed in the core sealing ring groove 31 to achieve sealing of the tail of the core 3. Specifically, the core sealing ring groove 31 is set on the side of the core 3, and the core sealing ring 5 is between the core 3 and the core seat 4.

[0037] The core 3 is equipped with a main cylinder 37 with a diameter of 4.45-0.03 mm. A snap-fit ​​portion 39 is located at the rear of the main cylinder 37, which engages with the core holder 4 to secure the core 3 to the main body 1. A transition section 38 with a diameter of 3.7 mm is located at the front of the main cylinder 37. This transition section 38 forms the installation channel 17 for the sealing ring 7 described below after the core 3 is assembled. The core holder 4 has an inner cylindrical surface 41 with a diameter of 4.5 ± 0.03 mm, which forms a rotational clearance fit with the main cylinder 37 of the core 3. The outer conical surface of the core is located at the front end of the transition section 33.

[0038] The core seat 4 is installed with interference fit at the position of the inner cylinder 16 of the main body cavity 13. The diameter of the inner cylinder 16 is 6.9-0.03mm. The front part of the core body 3 including the outer conical surface protrudes from the front end of the main body cavity 13. The core body conical surface sealing hose 6 is installed on the outer conical surface of the core to seal the core body 3 with the conical hole sealing surface 102 of the inner hole core cavity of the tire valve, thereby achieving the prototype sealing effect of the external valve and the original tire valve under the action of the installation torque.

[0039] At the front end of the outer conical surface of core body 3 is a minimum cylindrical end 31 with a diameter of 3.75-0.03mm. The outer cone formed by the outer conical surface of core body 3 has a small diameter end 32 with a diameter of 3.5-0.05mm and a large diameter end 33 with a diameter of 3.88-0.03, with an angle of 14 degrees. The large diameter end of the outer cone has a groove 35 with a diameter of 3.72*0.45mm. The length of the groove plus the outer cone in the axial direction of the external valve is 2.1mm. Core body 3 has a through-hole 34 with a diameter of 1-2mm.

[0040] The O-ring 7 is installed at the step 15 at the front end of the inner cylinder 16 in the main body cavity 13 to achieve a secondary seal between the original tire valve nozzle and the external valve nozzle. After installation, the front end of the core seat 4 is basically flush with the step 15.

[0041] The end of the main body 1 is processed and formed according to the core cavity and thread size of a standard valve nozzle, and is used to install a common valve core 200 and a protective cap 300.

[0042] The core cone sealing hose 6 is made of polytetrafluoroethylene, and the O-ring is made of silicone rubber or hydrogenated nitrile butadiene rubber. The core cone sealing hose 6 has an outer diameter of 3.9 ± 0.03 mm, a wall thickness of 0.33 mm, and a length of 2.16 ± 0.04 mm. After installation, the core cone sealing hose 6 is spaced 11-0.20 mm from the core seat 4.

[0043] During installation, first remove the valve core of the original tire valve, and then install the external valve of the present invention on the original tire valve 100. The core 3 utilizes the length of the transition section 38 so that the front end of the core 1 and the part where the core conical surface sealing hose 6 is set can be inserted into the position where the valve core was originally set, and the core conical surface sealing hose 6 can be close to the tapered hole sealing surface 102 of the valve core cavity. When the installation torque is less than 0.1Nm, the core 3, the core conical sealing hose 6, and the tapered hole sealing surface 102 of the valve core cavity are in a mutually rotating and gradually pressing process. As the torque gradually increases, the core rotates and presses vertically downward within the core seat. When the installation torque reaches 0.3-0.45Nm, the core cavity is fully installed. The tapered hole sealing surface 102 of the tire valve core cavity is sealed with the core conical sealing hose 6, achieving the original sealing effect between the external valve and the original tire valve. In addition, due to the spacing between the step 15 and the outer conical surface of the core 3, the "O"-shaped sealing ring 7 is also squeezed by the end of the original tire valve and the step 15, achieving a second seal. This not only improves the sealing effect, allowing the valve to achieve its original sealing function and effect, but also reduces the total mass.

[0044] Example 2, reference Figure 8 、 10 , 11, at the same time, refer to Figure 9 .

[0045] In this embodiment, compared with embodiment 1, the tail seal of the core 3 is changed, and the rest is the same as embodiment 1. The figures in embodiment 2 are the same as those in embodiment 1 and represent the same meanings.

[0046] For the tail sealing of the core body 3, the core body sealing ring 5 is installed in the core body sealing ring groove 36 to achieve the sealing of the tail of the core body 3. Specifically, the core body sealing ring groove 36 is set on the tail end face of the core body 3, and the core body sealing ring 5 is between the tail end of the core body 3 and the step 18 in the external valve mouth body.

[0047] Example 3, reference Figure 12 , at the same time, refer to Figure 9 、 10 、11.

[0048] In this embodiment, a connecting threaded column 21 with metric thread (or NPT sealing pipe thread) is provided on the side of the external valve body 2 for connecting to the carrier, and the threaded column is provided with a 1-2 mm through hole 22.

[0049] The other parts of this embodiment are the same as those of embodiment 1.

[0050] Example 4, reference Figure 13 , at the same time, refer to Figure 9 、 10 、11.

[0051] In this embodiment, a connecting threaded column 21 with metric thread (or NPT sealing pipe thread) is provided on the side of the external valve body 2 for connecting to the carrier, and the threaded column is provided with a 1-2 mm through hole 22.

[0052] The rest of this embodiment is the same as that of Embodiment 2.

[0053] The following is the result of type test verification using Example 2 as an example:

[0054] (1) Vibration test: The test is carried out on an electric vibration tester. A sensor with a mass of 20 grams is mounted on the connection port of the three-way valve of the present invention and then fixed on a test fixture in the same direction as the test displacement. Sinusoidal vibration is applied at a frequency of 8-10 Hz and a displacement amplitude of 15 mm for 2 minutes. This is repeated three times. The three-way valve is removed and the connection of the carrier is observed to ensure that there is no looseness or displacement.

[0055] (2) Sealing test: Install the three-way valve (together with the mounting parts) after the vibration test on the sealing test fixture with a torque of 0.3~0.45Nm, put it into the water tank together with the test fixture at room temperature, fill it with 1.4Mpa air pressure, and observe for 60s if there is no bubble overflow. Put the qualified products in the room temperature test together with the fixture and the ethanol used for the test into a low temperature box of (-40-5)℃, and use the compressed air of 0.85Mpa at low temperature and constant pressure for 24h, and observe for 60S if there is no bubble overflow. Put the qualified products in the low temperature test together with the fixture into a high temperature box of 100+5℃ for 24h, take it out and immerse it in (60±5)℃ water, fill it with 0.85Mpa compressed air, and observe for 60S if there is no bubble overflow. After the sealing test is completed, remove the three-way valve and observe whether the core sealing ring is damaged or wrinkled.

[0056] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the field of the present invention are included in the protection scope of the present invention.

Claims

1. A multifunctional external valve, comprising a valve body, characterized in that The valve body is provided with a three-way penetrating main body, the main body is provided with an axial center hole and a middle side connection part, and the side connection part penetrates the main body from the side; the side connection part is used to connect the loading device; A valve core is arranged in the axial center hole, and a valve core body is arranged on the valve core; A cavity is provided in front of the axial center hole of the main body, and the cavity is provided with an internal thread for connecting with the original tire valve; An outer conical surface is provided at the front of the core body, and the front part of the core body including the outer conical surface protrudes from the front end of the main body cavity. The core body conical surface sealing hose is installed on the outer conical surface of the core body to seal the core body with the conical hole sealing surface of the inner hole of the tire valve stem. The core body is provided with an axial through hole; The end of the main body is processed and formed according to the core cavity and thread size of the valve and the valve core is installed; The side connection portion is a connection hole or a threaded connection column, the opening of the connection hole is provided with a sealing ring groove, and the threaded connection column is provided with a through hole to penetrate the axial center hole from the side; The external valve is provided with a core sealing ring, which is installed in the core sealing ring slot to achieve sealing of the core tail.

2. A multifunctional external valve according to claim 1, characterized in that The main body cavity includes an inner cylindrical part; the valve core is installed in the core seat, the core seat is installed in the inner cylindrical position of the main body cavity with interference fit, and the core is installed in the core seat.

3. A multifunctional external valve according to claim 1, characterized in that The rear part of the core body is provided with a main cylinder and a clamping part, which are used to cooperate with the core seat to fix the core body on the main body. The front part of the main cylinder is provided with a transition section, which forms an installation channel for the sealing ring after the core body is assembled; the core seat is provided with an inner cylindrical surface, which forms a clearance fit with the main cylinder of the core body for mutual rotation; the outer conical surface of the core body is provided at the front end of the transition section.

4. A multifunctional external valve according to claim 1, characterized in that A minimum cylindrical end is provided at the front end of the outer conical surface of the core body. The outer cone formed by the outer conical surface of the core body has a small diameter end and a large diameter end, and an annular groove is provided at the large diameter end of the outer cone body.

5. The multifunctional external valve according to claim 1, characterized in that The "O"-shaped sealing ring is installed at the step position at the front end of the inner cylinder in the main body cavity to achieve secondary sealing between the original tire valve nozzle and the external valve nozzle; after the core seat is installed, its front end is basically flush with the step.

6. A method for installing a loading device for a valve, characterized in that: The valve core of the original tire valve is removed, and the external thread of the original tire valve is connected to the internal thread of the hole of any multifunctional external valve according to claims 1-5. The core body utilizes the length of the transition section so that the front end of the core body and the part where the core body conical surface sealing hose is set can be inserted into the position where the valve core of the original tire valve was originally set, and the core body conical surface sealing hose can be abutted against the conical hole sealing surface of the valve mouth core cavity; the prototype sealing effect of the external valve mouth and the original tire valve mouth is achieved.

7. A method for installing a loading device for a valve according to claim 6, characterized in that: The loading device includes a tire pressure gauge, a sensor for monitoring tire pressure, a cap-type external sensor, an automatic tire inflation device, and an inflation extension tube.

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