CN215861914U

CN215861914U - Central tire inflation and deflation system tire valve with self-cleaning function

Info

Publication number: CN215861914U
Application number: CN202122383710.5U
Authority: CN
Inventors: 迟永辉; 李健
Original assignee: Jinan Weidisi Transmission Technology Co ltd
Current assignee: Jinan Weidisi Transmission Technology Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-02-18
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses a central tire inflation and deflation system tire valve with a self-cleaning function, which comprises a valve body, a control valve and a one-way locking valve, wherein an annular sealing gasket is arranged in an exhaust port, a filter element is arranged on one side of the annular sealing gasket, a guide sleeve is arranged in a control valve cavity, the control valve is arranged in the guide sleeve in a clearance manner, the outer wall of a first sealing element is abutted against the inner wall of the guide sleeve, a first spring is arranged in an installation groove, and a boss is arranged on the left side of the control valve; the one-way locking valve comprises a valve core seat and a guide rod, the valve core seat is arranged on the upper portion of the conical valve seat, the lower end of the guide rod penetrates through the through hole, a guide hole in clearance fit with the guide rod is formed in the valve joint, and a second spring is arranged on the lower portion of the valve joint. The annular sealing gasket and the filter element are arranged at the exhaust port to form secondary sealing, so that sand, water and the like are effectively prevented from entering the tire valve, and in the exhaust process, dust and silt attached to the outer surface of the filter element are blown off by airflow with certain air pressure, so that the self-cleaning effect is achieved.

Description

Central tire inflation and deflation system tire valve with self-cleaning function

Technical Field

The utility model belongs to the technical field of tire valves, and particularly relates to a tire valve of a central tire inflation and deflation system with a self-cleaning function.

Background

The central inflation and deflation system can accurately control the tire pressure of the vehicle through the air pressure adjusting device in the running process so as to adapt to various terrains and application requirements, improve the maneuverability and the passing capacity of the vehicle, and be widely applied to vehicles such as off-road vehicles, trucks, tractors and the like. When the vehicle runs on a common asphalt road or a cement road at a high speed, the rolling resistance can be reduced by increasing the tire pressure of the tire; on relatively soft terrains such as marshland, sand, snowfield and the like, the tire pressure is reduced, and the contact area between the tire and the ground is increased to improve the adhesive force and the traction force. In order to ensure the safety of the vehicle during high-speed driving, the tire valve of the central inflation/deflation system needs to have high pressure maintaining capability, and the tire valve is required to have good sealing performance. Meanwhile, because the tire valve of the central inflation and deflation system is mounted on the wheel hub, sand muddy water can not pass through the tire valve, and the tire valve is required to have higher dustproof and waterproof performance.

The 'CN 101806369A central inflation and deflation system inflation and deflation valve assembly for automobile tires' adopts an electromagnetic valve for inflation and deflation control, because the electromagnetic valve is large in size, the inflation and deflation valve can only be installed on an axle, and a tire valve is also needed to be installed at the tire valve, so that the system integration level is not high. The patent CN103775693A discloses a valve core structure for a tire valve of a central inflation and deflation system of a tire, which adopts rubber as a dust ring, can play a certain role in dust prevention, but has low durability, and the condition that water enters a valve cavity in a muddy water environment can occur. Meanwhile, the valve body is controlled by high-low two-stage air pressure, and the requirement on air pressure control is high. Due to the low-pressure control air-bleeding process, the phenomenon of slow air leakage is easy to occur in the actual running process of the vehicle. The patent CN105840881A wheel-side system assembly is controlled by a positive pressure-vacuum mode, and the inflating and deflating valve bodies are symmetrically designed and have larger volume. Moreover, the tire valve vent is not provided with a dustproof device, sand is easy to enter and water is easy to enter in the terrains such as sand and marsh, the vent of the tire valve is easy to be blocked, and the durability and the air tightness of the sealing piece are reduced.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, provides the tire valve of the central tire inflation and deflation system with the self-cleaning function, effectively avoids sand inlet and water inlet of the tire valve, and has the advantages of simple structure, accurate control, easy assembly and the like.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a central tire inflation and deflation system tire valve with a self-cleaning function comprises a valve body, a control valve and a one-way locking valve, wherein an exhaust port is formed in one side of the valve body, an annular sealing gasket is arranged inside the exhaust port, a filter element is arranged on one side of the annular sealing gasket, the filter element blocks external sand, water and the like, and sand and water entering of the tire valve are avoided; a control valve cavity is arranged on one side inside the valve body, a one-way locking valve cavity and a valve joint cavity are sequentially arranged on the upper part of the control valve cavity, the one-way locking valve cavity and the valve joint cavity are coaxially arranged and are vertical to the control valve cavity, a guide sleeve is arranged in the control valve cavity, one end of the guide sleeve is connected with the valve body through a screw, an air inlet is arranged in the middle of the guide sleeve, the air inlet is connected with an air pressure control unit (not shown in the figure) of a central tire inflation and deflation system through an air pipe, a through hole is arranged in the upper part of the guide sleeve, the control valve is arranged in the guide sleeve in a clearance way, the outer wall of the control valve is provided with a conical surface, one end of the control valve is provided with a first sealing groove, a first sealing element is arranged in the first sealing groove, the outer wall of the first sealing element is abutted against the inner wall of the guide sleeve, the control valve is internally provided with a mounting groove, a first spring is arranged in the mounting groove, and the other end of the first spring is abutted against the inner wall of the guide sleeve; a boss is arranged on the left side of the control valve, one end of the boss abuts against the annular sealing gasket in an inflation state, the exhaust port is closed, the boss is separated from the annular sealing gasket in a deflation state, and the exhaust port is opened; the valve cavity of the one-way locking valve is provided with a conical valve seat, the one-way locking valve comprises a valve core seat and a guide rod, the valve core seat is arranged on the upper portion of the conical valve seat, the lower end of the guide rod penetrates through a through hole, a valve joint is arranged in the valve joint cavity, a guide hole in clearance fit with the guide rod is arranged in the valve joint, an air vent communicated with the valve cavity of the one-way locking valve is arranged on one side of the guide hole, a second spring is arranged on the lower portion of the valve joint, and the lower end of the second spring is abutted to the valve core seat.

As a further optimization of the technical scheme, one side of the valve body is provided with a pressing sheet which is detachably connected with the valve body through a screw, and the middle part of the pressing sheet is provided with a through hole which is coaxially arranged with the exhaust port.

As a further preferred option of the technical solution, the lower end of the pressing piece is provided with a hook, and the valve body is provided with a clamping groove for accommodating the hook.

As a further preferred option of the technical scheme, the through hole is a threaded hole, the threaded hole is internally and threadedly connected with a hollow top ring, and the right end of the top ring is abutted to the filter element.

As a further preferred option of the technical solution, a filter screen is arranged on one side of the top ring.

As a further preferred option of the technical solution, the filter screen is of a convex hemispherical structure.

As a further preferred option of the technical scheme, one side of the top ring is provided with a plurality of studs, one side of the filter screen is provided with an end cap, the end cap is inserted outside the studs and locked by nuts, and the end cap is provided with a handle.

In a further preferred embodiment of the present invention, an angle between the tapered surface of the outer wall of the control valve and the central axis member of the control valve is 15 to 20 degrees.

As a further preferred feature of the present invention, a groove is provided at one end of the first seal member so that the first seal member forms a lip seal.

As a further preferred aspect of the present technical solution, a second sealing groove is provided on the valve core seat, and a second sealing member is provided inside the second sealing groove. The second sealing element is an O-shaped ring.

The utility model has the beneficial effects that:

1) the annular sealing gasket and the filter element are arranged at the exhaust port to form secondary sealing, so that sand, water and the like are effectively prevented from entering the tire valve, and in the exhaust process, dust and silt attached to the outer surface of the filter element are blown off by airflow with certain air pressure, so that the self-cleaning effect is achieved.

2) Set up detachable preforming and fix filter core and annular sealing pad in valve body one side, the change of the filter core and annular sealing pad of being convenient for, and set up the pothook at the lower extreme of preforming, fix a position fast when the preforming of being convenient for is installed.

3) The top ring is arranged on one side of the pressing sheet, so that the pre-tightening force of the pressing sheet and the filter element can be conveniently adjusted, and the sealing effect of the filter element and the annular sealing gasket is ensured.

4) The hemispherical filter screen is arranged on one side of the top ring, so that dust, silt and the like are further prevented from entering the tire valve, and the situation that the dust, silt and the like are accumulated on the filter screen to block the filter screen is effectively avoided.

Drawings

FIG. 1 is a schematic view of a tire valve structure of a central tire inflation/deflation system with self-cleaning function according to the present invention.

FIG. 2 is a schematic view of the internal structure of a tire valve of a central tire inflation/deflation system with self-cleaning function according to the present invention.

FIG. 3 is a cross-sectional view of a central tire inflation/deflation system tire valve with self-cleaning feature of the present invention.

FIG. 4 is a sectional view of a valve body of a tire valve of a central tire inflation/deflation system with a self-cleaning function according to the present invention.

FIG. 5 is a sectional view of a control valve of a tire valve of a central tire inflation/deflation system with a self-cleaning function according to the present invention.

FIG. 6 is an exploded view of a control valve and a guide sleeve in a tire valve of a central tire inflation and deflation system with a self-cleaning function according to the present invention.

FIG. 7 is a schematic diagram of a first seal structure of a central tire inflation/deflation system tire valve with self-cleaning feature of the present invention.

FIG. 8 is a schematic diagram of a one-way locking valve structure of a central tire inflation and deflation system tire valve with a self-cleaning function according to the present invention.

FIG. 9 is a schematic diagram of an exploded view of a pressure plate, a top ring and a filter screen in a tire valve of a central tire inflation and deflation system with a self-cleaning function according to the present invention.

FIG. 10 is a tire valve inflation status diagram of a central tire inflation/deflation system with self-cleaning features according to the present invention.

FIG. 11 is a view showing a tire valve deflation state of a central tire inflation/deflation system with self-cleaning function according to the present invention.

In the figure: 1. a valve body; 101. controlling the valve cavity; 102. a valve cavity of the one-way locking valve; 103. a valve joint cavity; 104. a conical valve seat; 105. an exhaust port; 106. a card slot; 2. a guide sleeve; 201. an air inlet; 202. a through hole; 3. a control valve; 301. a first seal groove; 302. mounting grooves; 303. a boss; 4. a first spring; 5. a first seal member; 501. a spacing groove; 6. an annular seal; 7. a filter element; 8. tabletting; 801. a hook; 802. a threaded hole; 803. a top ring; 804. a stud; 805. filtering with a screen; 806. an end cap; 9. a one-way locking valve; 901. a valve core seat; 902. a guide bar; 903. a second seal groove; 904. a second seal member; 905. a second spring; 10. a valve joint; 1001. a vent hole; 1002. a guide hole; 11. a chamber I; 12. a chamber II; 13. and a chamber III.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to fig. 1 to 9, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a specific orientation, a specific orientation configuration and operation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1-4, a central tire inflation and deflation system tire valve with a self-cleaning function comprises a valve body 1, a control valve 3 and a one-way locking valve 9, wherein an exhaust port 105 is arranged on one side of the valve body 1, an annular sealing gasket 6 is arranged in the exhaust port 105, a filter element 7 is arranged on one side of the annular sealing gasket 6, and the filter element 7 blocks external sand, water and the like, so that sand and water entering into the tire valve are avoided; as shown in fig. 9, in this embodiment, one side of the valve body 1 is provided with a pressing plate 8, the pressing plate 8 is detachably connected with the valve body 1 through a screw, the middle of the pressing plate 8 is provided with a through hole 202, the through hole 202 is coaxially arranged with the exhaust port 105, and the detachable pressing plate 8 facilitates the replacement of the filter element 7 and the annular sealing gasket 6. The lower end of the pressing sheet 8 is provided with a clamping hook 801, the valve body 1 is provided with a clamping groove 106 for accommodating the clamping hook 801, and the clamping hook 801 is clamped inside the clamping groove 106 during the assembly of the pressing sheet 8, so that the quick positioning and installation of the pressing sheet 8 are facilitated. The through hole 202 is a threaded hole 802, the threaded hole 802 is internally and threadedly connected with a hollow top ring 803, the right end of the top ring 803 is abutted to the filter element 7, the position of the top ring 803 is adjusted by rotating the top ring 803, the sealing effect of the filter element 7 and the annular sealing gasket 6 is ensured, and the dustproof and waterproof effect of the tire valve is enhanced. One side of the top ring 803 is provided with a filter screen 805, and the filter screen 805 further prevents sand, water and the like from entering the tire valve. The filter screen 805 is of a convex hemispherical structure, which is beneficial for dust falling on the filter screen 805 to fall down, and further prevents the dust from blocking the filter screen 805. The top ring 803 is provided with a plurality of studs 804 on one side, the filter screen 805 is provided with an end cap 806 on one side, the end cap 806 is inserted outside the studs 804 and locked by nuts, the end cap 806 is provided with a handle to facilitate screwing operation of the top ring 803, the end cap 806 compresses the filter screen 805, sand and water are effectively prevented from entering the tire valve, and the detachable filter screen 805 facilitates replacement of the filter screen 805.

As shown in fig. 4, a control valve cavity 101 is arranged on one side inside a valve body 1, a one-way locking valve cavity 102 and a valve joint cavity 103 are sequentially arranged on the upper portion of the control valve cavity 101, the one-way locking valve cavity 102 and the valve joint cavity 103 are coaxially arranged and are perpendicular to the control valve cavity 101, as shown in fig. 3, a guide sleeve 2 is arranged inside the control valve cavity 101, one end of the guide sleeve 2 is connected with the valve body 1 through a screw, an air inlet 201 is arranged in the middle of the guide sleeve 2, the air inlet 201 is connected with an air pressure control unit (not shown in the figure) of a central tire inflation and deflation system through an air pipe, as shown in fig. 6, a through hole 202 is arranged on the upper portion of the guide sleeve 2, the control valve 3 is installed inside the guide sleeve 2 in a clearance manner, the outer wall of the control valve 3 has a conical surface, the angle between the conical surface and a central axis part of the control valve 3 is 15-20 degrees, a first sealing groove 301 is arranged at one end of the control valve 3, and a first sealing groove 5 is installed inside the first sealing groove 301, the outer wall of the first sealing element 5 abuts against the inner wall of the guide sleeve 2, one end of the first sealing element 5 is provided with a spacing groove 501, so that the first sealing element 5 forms a lip-shaped sealing ring, the control valve 3 is internally provided with an installation groove 302, the installation groove 302 is internally provided with a first spring 4, and the other end of the first spring 4 abuts against the inner wall of the guide sleeve 2; as shown in fig. 5, a boss 303 is provided on the left side of the control valve 3, when the control valve is in an inflated state, one end of the boss 303 abuts against the annular seal gasket 6, the exhaust port 105 is closed, when the control valve is in a deflated state, the boss 303 is separated from the annular seal gasket 6, and the exhaust port 105 is opened;

as shown in fig. 4 and 8, a conical valve seat 104 is disposed at a lower portion of a valve cavity 102 of the one-way lock valve, the one-way lock valve 9 includes a valve core seat 901 and a guide rod 902, the valve core seat 901 is disposed at an upper portion of the conical valve seat 104, a lower end of the guide rod 902 passes through the through hole 202, a second sealing groove 903 is disposed on the valve core seat 901, and a second sealing member 904 is disposed inside the second sealing groove 903. The second sealing element 904 is an O-ring, so that the sealing effect of the one-way locking valve 9 is ensured.

As shown in fig. 2-3, a valve joint 10 is disposed in the valve joint cavity 103, a guide hole 1002 in clearance fit with the guide rod 902 is disposed in the valve joint 10, a vent hole 1001 communicated with the one-way locking valve cavity 102 is disposed on one side of the guide hole 1002, a second spring 905 is disposed at a lower portion of the valve joint 10, and a lower end of the second spring 905 abuts against the valve core seat 901.

In a static state, as shown in fig. 10, the control valve 3 is in a static position under the action of the first spring 4, the one-way locking valve 9 is in a closed position under the action of the second spring 905, the lower end of the one-way locking valve 9 is not in contact with the conical surface of the control valve 3, the second sealing element 904 of the one-way locking valve 9 is tightly attached to the conical valve seat 104 of the one-way locking valve cavity 102, airflow cannot flow into the cavity ii 12 from the cavity iii 13, the sealing lip of the lip-shaped sealing ring of the control valve 3 is tightly attached to the inner wall of the guide sleeve 2 to form one-way sealing, and gas cannot flow into the cavity i 11 from the cavity ii 12 either. At this time, the boss 303 at the bottom of the control valve 3 is tightly attached to the annular seal 6 at the exhaust port 105, and the exhaust port 105 is closed.

When inflated, as shown in fig. 10, the air pressure control unit of the central tire inflation/deflation system applies a positive pressure of a certain pressure at the air inlet port 201. The control valve 3 is in a rest position under the action of the first spring 4, and the boss 303 at one end of the control valve 3 abuts against the annular seal 6 at the exhaust port 105. Because the sealing lip of lip type sealing washer has certain inclination and elasticity, the sealing lip warp under the effect of admission pressure, forms the clearance between the lateral wall of control valve 3 and uide bushing 2, and the air current gets into cavity II 12 through cavity I11. Under the action of inflation pressure, the one-way lock valve 9 overcomes the internal tire pressure and the acting force of the second spring 905, the second sealing piece 904 of the one-way lock valve 9 is not attached to the conical valve seat 104 of the one-way lock valve cavity 102 any more, the one-way lock valve 9 is opened, and air flows into the cavity III 13 from the cavity II 12. When the desired tire pressure is reached, the control device shuts off the supply of compressed air and the air inlet line pressure decreases. The one-way lock valve 9 is pressed back to the closed position by the air pressure of the tire and the action of the second spring 905. This approach can accurately increase tire pressure to a predetermined value and place the inlet line of the tire valve assembly in a pressureless state after the inflation process.

During air exhaust, as shown in fig. 11, a negative pressure is generated in the air inlet pipeline by the air pressure control unit of the central tire inflation and deflation system, the control valve 3 overcomes the elastic force of the first spring 4 and moves to the air inlet 201 under the action of the negative pressure, the sealing lip of the lip-shaped sealing ring is tightly attached to the inner wall of the guide sleeve 2 to form one-way sealing, and air cannot flow into the chamber i 11 from the chamber ii 12. The lower end of the one-way locking valve 9 contacts with the conical surface of the control valve 3 when the control valve 3 moves, the one-way locking valve 9 moves upwards under the action of the second spring 905, the second sealing element 904 of the one-way locking valve 9 is not attached to the conical valve seat 104 of the one-way locking valve cavity 102, meanwhile, the boss 303 at the tail end of the control valve 3 is not attached to the annular sealing gasket 6 at the exhaust port 105, the exhaust port 105 is opened, and air flow flows into the cavity II 12 from the cavity III 13, so that air in the tire escapes from the exhaust port 105. Once the required target pressure is reached, the air pressure of the air inlet 201 is changed into positive pressure, the control valve 3 moves to the rest position under the action of the first spring 4, the conical surface is separated from the contact with the lower end of the one-way locking valve 9, and the one-way locking valve 9 returns to the closed position under the action of the internal pressure of the tire and the second spring 905; in addition, in the tire exhaust process, the air flow with certain air pressure blows off dust and silt attached to the filter element and the outer surface of the filter screen, and the self-cleaning effect is achieved.

During tire pressure detection, similar to the inflation process, positive pressure is applied to the air inlet 201, and when the pressure inside the air path is balanced, the pressure acquired by the control end is the tire pressure.

The foregoing is merely exemplary and illustrative of the present invention, and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. A central tire inflation and deflation system tire valve with a self-cleaning function comprises a valve body, a control valve and a one-way locking valve, wherein one side of the valve body is provided with an exhaust port, and an annular sealing gasket is arranged inside the exhaust port, and is characterized in that one side of the annular sealing gasket is provided with a filter element, one side inside the valve body is provided with a control valve cavity, the upper part of the control valve cavity is sequentially provided with a one-way locking valve cavity and a valve connector cavity, the inside of the control valve cavity is provided with a guide sleeve, the middle part of the guide sleeve is provided with an air inlet, the air inlet is connected with an air pressure control unit of the central tire inflation and deflation system through an air pipe, the upper part of the guide sleeve is provided with a through hole, the control valve is arranged inside the guide sleeve in a clearance manner, the outer wall of the control valve is provided with a conical surface, one end of the control valve is provided with a first sealing groove, a first sealing element is arranged inside the first sealing groove, and the outer wall of the first sealing element is abutted against the inner wall of the guide sleeve, the control valve is internally provided with a mounting groove, a first spring is arranged in the mounting groove, and the other end of the first spring is abutted against the inner wall of the guide sleeve; a boss is arranged on the left side of the control valve; the valve cavity of the one-way locking valve is provided with a conical valve seat, the one-way locking valve comprises a valve core seat and a guide rod, the valve core seat is arranged on the upper portion of the conical valve seat, the lower end of the guide rod penetrates through a through hole, a valve joint is arranged in the valve joint cavity, a guide hole in clearance fit with the guide rod is arranged in the valve joint, an air vent communicated with the valve cavity of the one-way locking valve is arranged on one side of the guide hole, a second spring is arranged on the lower portion of the valve joint, and the lower end of the second spring is abutted to the valve core seat.

2. The tire valve of central tire inflation/deflation system with self-cleaning function as claimed in claim 1, wherein the valve body is provided with a pressing plate on one side, the pressing plate is detachably connected with the valve body by a screw, the pressing plate is provided with a through hole in the middle, and the through hole is coaxially arranged with the exhaust port.

3. The self-cleaning central tire inflation/deflation system tire valve of claim 2, wherein the lower end of the pressure plate is provided with a hook, and the valve body is provided with a slot for receiving the hook.

4. The tire valve of central tire inflation and deflation system with self-cleaning function as claimed in claim 3, wherein the through hole is a threaded hole, a hollow top ring is connected with the threaded hole through threads, and the right end of the top ring is abutted against the filter element.

5. The self-cleaning central tire inflation/deflation system tire valve of claim 4, wherein a strainer is provided on one side of the top ring.

6. The self-cleaning tire valve of central tire inflation/deflation system of claim 5, wherein the strainer is of convex hemispherical structure.

7. The tire valve of central tire inflation and deflation system with self-cleaning function as claimed in claim 5 or 6, wherein a plurality of studs are provided on one side of the top ring, an end cap is provided on one side of the filter screen, the end cap is inserted outside the studs and locked by nuts, and a handle is provided on the end cap.

8. The self-cleaning central tire inflation/deflation system tire valve of claim 1, wherein the angle between the conical surface of the outer wall of the control valve and the central axis of the control valve is 15 to 20 degrees.

9. A self-cleaning central tire inflation and deflation system tire valve as claimed in claim 1, wherein the first sealing member is provided with a groove at one end such that the first sealing member forms a lip seal.

10. The central tire inflation and deflation system tire valve with self-cleaning function as claimed in claim 1, wherein the valve core seat is provided with a second sealing groove, a second sealing element is arranged inside the second sealing groove, and the second sealing element is an O-ring.