Air tap valve rod assembly

Abstract

The invention relates to an air tap valve rod assembly, which comprises a valve rod, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, and is characterized in that the valve core comprises a rod body and a radial flange, the blocking piece is movably arranged on the rod body in a sleeving manner and is blocked on the radial flange; and the elastic piece is sleeved on the rod body, is blocked on the blocking piece and is used for sealing and propping against an air tap penetrating hole of a wheel rim. Therefore, processing is easy, materials are saved, manufacturing cost is low, and the components can be matched and selected variously and flexibly according to different requirements.

Description

Technical Field

[0001] This invention relates to an inflation device, and more particularly to an air valve stem assembly. Background Technology

[0002] Vehicles (such as bicycles, motorcycles, and cars) are important means of transportation, and tires are crucial components for the smooth and efficient operation of vehicles. Tire valves are installed on and protrude from the wheel rim. Generally, a tire valve includes a valve stem assembly and a valve core located within the valve stem assembly. The valve stem assembly is inserted into and secured to the wheel rim, while the valve core is movable relative to the valve stem assembly to open and close the gas passage within the valve stem assembly for inflation or deflation.

[0003] Please refer to Figure 1 It is known that the valve stem 10a of a valve stem assembly is typically machined from a raw pipe fitting 200a with a fixed outer diameter. The raw pipe fitting 200a retains its original diameter at one end, while the remaining portion is machined to reduce its diameter to form a stem body 11a, with a radial flange 12a at the end and a threaded section 111a on the stem body 11a. An elastic element is fitted onto the stem body 11a and stopped by the radial flange 12a. This elastic element abuts against a valve stem hole in a rim. The threaded section 111a can be secured with a nut, allowing the elastic element and the nut to be tightly clamped against the rim wall. However, manufacturing the stem body 11a requires the use of a large-diameter raw pipe fitting 200a, and since the volume is directly proportional to the square of the wall thickness of the raw pipe fitting 200a, a very large amount of material must be removed. Therefore, the valve stem 10a is known to have high material costs, long processing time, and low production efficiency.

[0004] Therefore, it is necessary to provide a novel and progressive valve stem assembly to solve the above-mentioned problems. Summary of the Invention

[0005] The main objective of this invention is to provide a valve stem assembly that is easy to process, saves materials, has low manufacturing costs, and allows for diverse and flexible combinations of components to meet different needs.

[0006] To achieve the above objectives, the present invention provides a valve stem assembly, comprising: a valve stem including a stem body and a radial flange radially protruding from the outer peripheral surface of the stem body, the stem body including a threaded section; a stop member movably fitted onto the stem body and stopped at the radial flange; and an elastic member fitted onto the stem body and stopped at the stop member, for sealing a valve stem through hole of a wheel rim.

[0007] Preferably, the shaft and the radial flange are integrally formed.

[0008] Preferably, the valve stem is machined from an original pipe fitting with a fixed outer diameter, and the outer diameter of the radial flange is equal to that of the original pipe fitting.

[0009] Preferably, the stop includes a bore with a diameter larger than the outer diameter of the threaded section.

[0010] Preferably, the hardness of the stop is greater than the hardness of the valve stem.

[0011] Preferably, the stop includes an annular bottom wall that stops at the radial flange and a peripheral wall connected to the annular bottom wall, the annular bottom wall and the peripheral wall forming a receiving groove that receives a portion of the elastic member.

[0012] Preferably, the elastic member includes a receiving protrusion and a sealing end, the outer diameter of the receiving protrusion is smaller than the outer diameter of the sealing end, the receiving protrusion is received in the receiving groove, and the sealing end is used to seal the air nozzle through hole of the wheel rim.

[0013] Preferably, the outer diameter of the elastic element is not greater than the outer diameter of the stop element.

[0014] Preferably, the stem and the radial flange are integrally formed; the valve stem is machined from an original pipe fitting with a fixed outer diameter, and the outer diameter of the radial flange is equal to that of the original pipe fitting; the threaded section extends continuously for at least 70% of the length of the stem; the valve stem further includes a through-hole, and the stem further includes two drive protrusions, which are axially protruding from the end face of the radial flange. The two drive protrusions are radially oppositely arranged on opposite sides of the opening of the through-hole, each drive protrusion including an arcuate inner surface and two planes located on opposite sides of the arcuate inner surface, the arcuate inner surface extending along the edge of the opening, and the two planes being parallel; the stop includes a set of holes. The diameter of the sleeve hole is larger than the outer diameter of the threaded section; the stop and the valve stem are made of different materials, the hardness of the stop is greater than the hardness of the valve stem, the valve stem is made of aluminum alloy, and the stop is made of stainless steel; the bottom wall of the ring and the peripheral wall are integrally formed and have the same thickness; the axial dimension of the receiving protrusion is greater than the depth of the receiving groove; the receiving protrusion gradually tapers towards the bottom wall of the ring, and the sealing end tapers away from the bottom wall of the ring; a shoulder is formed between the receiving protrusion and the sealing end, and the shoulder and the end face of the peripheral wall face axially; the gap distance between the hole wall of the sleeve and the rod body is not greater than one-fifth of the distance between the inner edge and the outer edge of the end face of the receiving protrusion.

[0015] Preferably, the ratio of the outer diameter of the rod to the outer diameter of the radial flange is not less than 0.6.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention provides a valve stem assembly, wherein the valve stem includes a stem body and a radial flange protruding radially from the outer circumferential surface of the stem body; a stop member movably fitted onto the stem body and abutting against the radial flange; and an elastic member fitted onto the stem body and abutting against the stop member, for sealing a valve through hole in a rim. The threaded section of the stem body extends at least 70% of the stem body's length, making it suitable for rims of various shapes and sizes, or for connecting different types of valve core assemblies to the end of the stem body. The ratio of the outer diameter of the stem body to the outer diameter of the radial flange is not less than 0.6; the larger this ratio, the less material needs to be removed. This valve stem is easy to process, saves material, has low manufacturing costs, and the stop member and elastic member can be flexibly combined according to different needs. Attached Figure Description

[0018] Figure 1 This is a radial side view of a known valve stem.

[0019] Figure 2 This is a radial side view of the valve stem according to an embodiment of the present invention.

[0020] Figure 3 This is a perspective view of a valve stem according to an embodiment of the present invention.

[0021] Figure 4 and Figure 5 This is a partially enlarged view of the valve stem according to an embodiment of the present invention.

[0022] Figure 6 and Figure 7 This is an axial side view of the valve stem according to an embodiment of the present invention.

[0023] Figure 8 This is a perspective view of a valve stem assembly according to an embodiment of the present invention.

[0024] Figure 9 for Figure 8 The exploded diagram.

[0025] Figure 10 for Figure 8 Cross-sectional view.

[0026] Figure 11 This is a schematic diagram illustrating an embodiment of the present invention.

[0027] Figure Labels

[0028] 10a: Valve stem; 11a: Stem body; 111a: Threaded section; 12a: Radial flange; 200a: Original fitting; 1: Nozzle valve stem assembly; 10: Valve stem; 11: Stem body; 111: Threaded section; 112: Drive protrusion; 113: Arc-shaped inner surface; 114: Flat surface; 12: Radial flange; 13: Nut; 14: Shaft through hole; 20: Stop; 21: Sleeve hole; 22: Ring bottom wall; 23: Peripheral wall; 24: Receiving groove; 30: Elastic element; 31: Receiving protrusion; 32: Sealing end; 33: Shoulder; 100: Wheel rim; 101: Nozzle through hole; 200: Original fitting; D1: Outer diameter; D2: Outer diameter. Detailed Implementation

[0029] The following examples illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention.

[0030] Please refer to Figures 2 to 11 This illustrates an embodiment of the present invention, wherein the valve stem assembly 1 of the present invention includes a valve stem 10, a stop member 20 and an elastic member 30.

[0031] The valve stem 10 includes a stem body 11 and a radial flange 12 radially protruding from the outer circumferential surface of the stem body 11. The stem body 11 includes a threaded section 111. The stop member 20 is movably fitted onto the stem body 11 and abuts against the radial flange 12. The elastic member 30 is fitted onto the stem body 11 and abuts against the stop member 20. The elastic member 30 is used to seal against a nozzle through hole 101 of a wheel rim 100. By screwing a nut 13 into the threaded section 111, the elastic member 30 and the nut 13 can be securely clamped to the annular wall of the wheel rim 100. The inner surface of the end of the stem body 11 may be provided with an internal thread, and a valve core assembly can be directly screwed onto the internal thread from the outside. Preferably, the threaded section 111 extends continuously for at least 70% of the length of the stem 11, making it suitable for various types and sizes of wheel rims, or for connecting different types of valve core assemblies to the end of the stem 11. In one possible embodiment, the ratio of the outer diameter D1 of the stem 11 to the outer diameter D2 of the radial flange 12 is not less than 0.6. For example, this ratio can be 0.625, 0.65, 0.675, 0.70, 0.725, 0.75, 0.80, 0.825, 0.85, or other values. The larger the ratio, the less material needs to be removed. This makes the valve stem 10 easier to process, saves materials, and reduces manufacturing costs. Furthermore, the stop 20 and the elastic member 30 can be configured in various flexible ways to meet different needs.

[0032] Preferably, the stem 11 and the radial flange 12 are integrally formed, providing good structural strength. For example, the valve stem 10 is machined (e.g., turned) from an original pipe fitting 200 with a fixed outer diameter, and the outer diameter of the radial flange 12 is equal to that of the original pipe fitting 200. Specifically, the stop 20 includes a bushing 21, the diameter of which is larger than the outer diameter of the threaded section 111. The valve stem 10 further includes a through hole 14, and the stem body 11 further includes two drive protrusions 112. The two drive protrusions 112 are axially protruding from the end face of the radial flange 12. The two drive protrusions 112 are radially oppositely arranged on opposite sides of the opening of the through hole 14. Each drive protrusion 112 includes an arc-shaped inner surface 113 and two planes 114 located on opposite sides of the arc-shaped inner surface 113. The arc-shaped inner surface 113 extends along the edge of the opening of the through hole 14, and the two planes 114 are parallel. The two drive protrusions 112 can be driven by a drive tool assembly.

[0033] The stop 20 can be made of metal or non-metal, with materials having higher hardness being preferred. In one possible embodiment, the stop 20 is made of a different material than the valve stem 10, and the hardness of the stop 20 is greater than that of the valve stem 10. For example, the valve stem 10 is made of aluminum alloy, and the stop 20 is made of stainless steel.

[0034] In detail, the stop 20 further includes an annular bottom wall 22 that stops at the radial flange 12 and a peripheral wall 23 connected to the annular bottom wall 22. The annular bottom wall 22 and the peripheral wall 23 form a receiving groove 24, which accommodates a portion of the elastic member 30, preventing the elastic member 30 from undergoing significant radial deformation and exceeding the bearing capacity of the stop 20 when subjected to force, thus providing a good axial sealing effect. The annular bottom wall 22 and the peripheral wall 23 are integrally formed and have the same thickness. For example, the stop 20 can be integrally bent from a ring plate, making manufacturing quick and easy.

[0035] In this embodiment, the elastic member 30 includes a receiving protrusion 31 and a sealing end 32. The outer diameter of the receiving protrusion 31 is smaller than the outer diameter of the sealing end 32. The receiving protrusion 31 is accommodated in the receiving groove 24, and the sealing end 32 is used to seal against the air nozzle through hole 101 of the wheel rim 100. Preferably, the outer diameter of the elastic member 30 is not greater than the outer diameter of the stop member 20, so that the elastic member 30 will not radially exceed the bearing range of the stop member 20 when deformed under force. The axial dimension of the receiving protrusion 31 is greater than the depth of the receiving groove 24, ensuring that the receiving protrusion 31 can reliably abut against the bottom wall 22 of the ring.

[0036] Furthermore, the accommodating protrusion 31 gradually tapers towards the bottom wall 22 of the ring, which helps in the fit and positioning of the accommodating protrusion 31 and the stop 20. Preferably, the gap (ring gap) between the hole wall of the sleeve 21 and the rod body 11 is not greater than one-fifth of the distance between the inner and outer edges of the end face of the accommodating protrusion 31, or the ring gap between the hole wall of the sleeve 21 and the rod body 11 is not greater than 1.2 mm. This can stably maintain the accommodating protrusion 31 and significantly reduce the material deformation and flow of the accommodating protrusion 31, thereby improving the sealing stability and reliability of the elastic member 30. The extension direction of the portion of the peripheral wall 23 away from the bottom wall 22 of the ring can be perpendicular to the bottom wall 22 of the ring, which can effectively stop and limit the accommodating protrusion 31. Moreover, there is a gap space between the peripheral wall 23 and the tapering accommodating protrusion 31, which can provide a larger deformation margin for the accommodating protrusion 31. The sealing end 32 tapers away from the bottom wall 22 of the ring, making it suitable for sealing the nozzle through holes of different diameters on different wheel rims. A shoulder 33 is formed between the receiving protrusion 31 and the sealing end 32. The shoulder 33 faces the end face of the peripheral wall 23 axially, which can effectively limit the axial deformation of the elastic member 30 and effectively limit the elastic member 30 in the receiving groove 24.

Claims

1. A valve stem assembly, characterized in that, include: A valve stem includes a stem body and a radial flange that protrudes radially from the outer peripheral surface of the stem body, the stem body including a threaded section; A stop member, movably fitted onto the rod body and stopped at the radial flange; and An elastic element is fitted onto the rod and stopped by the stop, for sealing a through hole of an air nozzle on a wheel rim.

2. The valve stem assembly as described in claim 1, characterized in that, The shaft and the radial flange are integrally formed.

3. The valve stem assembly as described in claim 2, characterized in that, The valve stem is machined from an original pipe fitting with a fixed outer diameter, and the outer diameter of the radial flange is equal to that of the original pipe fitting.

4. The valve stem assembly as described in claim 1, characterized in that, The stop includes a set of holes, the diameter of which is larger than the outer diameter of the threaded section.

5. The valve stem assembly as described in claim 1, characterized in that, The hardness of the stop is greater than that of the valve stem.

6. The valve stem assembly as described in claim 1, characterized in that, The stop includes an annular bottom wall that stops at the radial flange and a peripheral wall connected to the annular bottom wall. The annular bottom wall and the peripheral wall form a receiving groove that accommodates a portion of the elastic member.

7. The valve stem assembly as described in claim 6, characterized in that, The elastic element includes a receiving protrusion and a sealing end. The outer diameter of the receiving protrusion is smaller than the outer diameter of the sealing end. The receiving protrusion is accommodated in the receiving groove, and the sealing end is used to seal the air nozzle through hole of the wheel rim.

8. The valve stem assembly as described in claim 1, characterized in that, The outer diameter of the elastic element is not greater than the outer diameter of the stop element.

9. The valve stem assembly as described in claim 7, characterized in that, The valve stem and the radial flange are integrally formed; the valve stem is machined from an original pipe fitting with a fixed outer diameter, and the outer diameter of the radial flange is equal to that of the original pipe fitting; the threaded section extends continuously for at least 70% of the length of the valve stem; the valve stem further includes a through-hole, and the valve stem further includes two drive protrusions, which are axially protruding from the end face of the radial flange. The two drive protrusions are radially oppositely arranged on opposite sides of the opening of the through-hole, and each drive protrusion includes an arc-shaped inner surface and two planes located on opposite sides of the arc-shaped inner surface. The arc-shaped inner surface extends along the edge of the opening, and the two planes are parallel; the stop includes a sleeve hole. The bore diameter is larger than the outer diameter of the threaded section; the stop and the valve stem are made of different materials, the stop has a higher hardness than the valve stem, the valve stem is made of aluminum alloy, and the stop is made of stainless steel; the bottom wall of the ring and the peripheral wall are integrally formed and have the same thickness; the axial dimension of the receiving protrusion is greater than the depth of the receiving groove; the receiving protrusion tapers towards the bottom wall of the ring, and the sealing end tapers away from the bottom wall of the ring; a shoulder is formed between the receiving protrusion and the sealing end, and the shoulder faces the end face of the peripheral wall axially; the gap between the hole wall of the sleeve and the rod body is not greater than one-fifth of the distance between the inner and outer edges of the end face of the receiving protrusion.

10. The valve stem assembly as claimed in any one of claims 1 to 9, characterized in that, The ratio of the outer diameter of the rod to the outer diameter of the radial flange is not less than 0.6.

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