Single-channel rotary sealing device assembly

Abstract

The utility model relates to a single-channel rotary sealing device assembly, and belongs to the field of wheel body automatic inflation systems. Comprising a hub cover; the valve body is mounted in an inner hole of the hub cover; one end of the rotating shaft is communicated with an axle, the other end of the rotating shaft is connected into an inner hole of the valve body, a bearing is arranged on the rotating shaft, and the inner hole wall of the valve body is connected with the bearing; the pressure rotating shaft seal is connected to the end, away from an axle, of the rotating shaft, and the pressure rotating shaft seal is located in an inner hole of the valve body; the limiting assembly is connected to the rotating shaft and used for limiting the position of the bearing. The pressure rotating shaft seal can be applied to more vehicle types, the durability of the product is enhanced by using the pressure rotating shaft seal, the pressure maintaining capacity of the rotating shaft is high, and the reliability of the product is improved as the air chamber is in an emptying state when not working.

Description

Technical Field

[0001] The present application relates to the field of wheel body automatic inflation system, and in particular to a single-channel rotary sealing device assembly. Background Art

[0002] The wheel-side single-channel rotary seal device of the tire inflation system is composed of a stainless steel shaft tube, a rubber sealing ring and auxiliary metal parts. The shaft tube is installed at the center of the end of the axle, and the sealing ring is located at both ends of the shaft tube and fits with it.

[0003] When the tire rotates, the joint surface of the seal ring and the axle tube rotates to achieve air tightness in the rotating state. High-pressure air is connected through the inner hole of the axle tube and transported from the inside of the axle to the tire valve. However, during the rotation of the tire, there is always a certain axial offset between the rotation center and the axle center. At this time, the axle tube will produce radial disturbances. Under this disturbance, the seal ring wears too quickly and is easy to fall off. Summary of the invention

[0004] The embodiment of the present application provides a single-channel rotary sealing device assembly to solve the problem in the related art that radial disturbances generated during tire rotation easily cause the sealing ring to wear too quickly and fall off easily.

[0005] The embodiment of the present application provides a single-channel rotary sealing device assembly, comprising: a hub cover; a valve body, which is installed in the inner hole of the hub cover; a rotary shaft, one end of which is connected to the vehicle axle, and the other end is connected to the inner hole of the valve body, the rotary shaft is provided with a bearing, and the inner hole wall of the valve body is connected to the bearing; a pressure rotary shaft seal, which is connected to the end of the rotary shaft away from the vehicle axle, and the pressure rotary shaft seal is located in the inner hole of the valve body; a limit assembly, which is connected to the rotary shaft and is used to limit the position of the bearing

[0006] In some embodiments, the rotating shaft includes an insert shaft section and an assembly step shaft section, the insert shaft section is inserted into the inner hole of the valve body, the pressure rotary shaft seal is connected to the insert shaft section, the limit assembly and the bearing are both installed on the assembly step shaft section, a first limit step is provided on the assembly step shaft section, one end of the bearing abuts against the first limit step, and the other end abuts against the limit assembly.

[0007] In some embodiments, the limit assembly includes: a first retaining ring, a step stop portion is provided on the inner hole wall of the valve body, one end of the first retaining ring abuts against the outer ring of the bearing, and the other end abuts against the step stop portion; a second retaining ring, a second limit step is provided on the assembly step shaft section near the bearing, the second retaining ring is connected in the second limit step, and the second retaining ring abuts against the inner ring of the bearing.

[0008] In some embodiments, a valve cover is connected to the valve body, the valve cover is located outside the hub cover, and a first mounting screw is connected between the valve cover and the valve body.

[0009] In some embodiments, a hub cover pressure plate is connected to the valve body in the inner hole of the hub cover, and a second mounting screw is connected between the hub cover pressure plate and the valve cover.

[0010] In some embodiments, one end of the valve body passes through the valve cover, and a first sealing ring is connected around the valve body.

[0011] In some embodiments, a second sealing ring is connected to the valve body around a portion passing through the valve cover.

[0012] In some embodiments, a third sealing ring is provided between the outer side of the hub cover and the valve cover.

[0013] In some embodiments, an air source connector is connected to one end of the rotating shaft close to the axle, and a connecting plate is further provided on the valve body, and the air source connector is connected to the axle through the connecting plate.

[0014] In some embodiments, a dustproof sealing ring is connected to the rotating shaft near the axle, and the dustproof sealing ring fits with the inner hole of the valve body.

[0015] The beneficial effects of the technical solution provided by this application include:

[0016] An embodiment of the present application provides a single-channel rotary sealing device assembly. When the wheel rotates, the hub cover and the valve body will rotate accordingly. At this time, the pressure rotary shaft seal and the limit member ensure the relative stability of the valve body position during rotation. The sealing effect of the pressure rotary shaft seal is fully exerted with little disturbance. The service life of the pressure rotary shaft seal is long and stable, and the use of an oil-gas seal enhances the durability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the overall explosion structure provided in the embodiment of the present application;

[0019] Figure 2 A schematic diagram for illustrating the overall structure provided in the embodiment of the present application;

[0020] Figure 3A schematic diagram for showing a cross-sectional structure of a position limiting component provided in an embodiment of the present application;

[0021] Reference numerals:

[0022] 1. Hub cover; 2. Valve body; 200. Step stop; 20. Valve cover; 21. First mounting screw; 22. First sealing ring; 23. Second sealing ring; 3. Rotating shaft; 30. Bearing; 31. Insert shaft section; 32. Assembly step shaft section; 320. First limit step; 321. Second limit step; 4. Pressure rotary shaft seal; 5. First retaining ring; 6. Second retaining ring; 7. Hub cover pressure plate; 70. Second mounting screw; 71. Third sealing ring; 8. Air source connector; 80. Connecting plate; 81. Fourth mounting screw; 9. Dustproof sealing ring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] The embodiment of the present application provides a single-channel rotary sealing device assembly, which can solve the radial disturbance generated during the rotation of the tire, which can easily cause the sealing ring to wear too quickly and fall off easily.

[0025] See also Figures 1 to 3As shown, the embodiment of the present application provides a single-channel rotary sealing device assembly, including: a hub cover 1, a valve body 2, a rotary shaft 3, a pressure rotary shaft seal 4 and a limit assembly. The valve body 2 is installed in the inner hole of the hub cover 1, one end of the rotary shaft 3 is connected to the axle, and the other end is connected to the inner hole of the valve body 2. The maximum aperture of the rotary shaft 3 is between 7mm and 7.5mm, so that the pressure holding capacity of the single-channel rotary sealing device assembly is strong, and when not working, the air can be emptied as soon as possible, and then a bearing 30 is provided on the rotary shaft 3, and the inner hole wall of the valve body 2 is connected to the bearing 30, so that the valve body 2 and the rotary shaft 3 rotate relative to each other. When the vehicle is driving, the rotary shaft 3 is fixed, the hub cover 1 and the valve body 2 rotate with the wheel, and are connected to the axle through the rotary shaft 3, so that the wheel can be replenished with air at any time; in order to ensure that the sealing is guaranteed during the wheel inflation process, The pressure rotary shaft seal 4 is connected to the end of the rotating shaft 3 away from the axle, and the pressure rotary shaft seal 4 is located in the inner hole of the valve body 2, so that the pressure rotary shaft seal 4 has a good sealing effect during use, and after being set away from the axle, the influence of radial disturbance on the pressure rotary shaft seal 4 during wheel driving can be further reduced. The size of the pressure rotary shaft seal 4 is larger than the conventional Y-type sealing ring, and the service life of the pressure rotary shaft seal 4 is long, which enhances the durability of the channel rotary sealing device assembly; finally, the set limit assembly is connected to the rotating shaft 3, and when the valve body 2 rotates, the limit assembly can limit the position of the bearing 30, thereby ensuring the stable rotation of the bearing 30, reducing the occurrence of movement, and the structure is reliable.

[0026] In the present application, an air source connector 8 is connected to one end of the rotating shaft 3 close to the axle, and a connecting plate 80 is also provided on the valve body 2. A fourth mounting screw 81 is connected between the connecting plate 80 and the valve body 2. The connecting plate 80 covers the valve body 2, and then the air source connector 8 is passed through the connecting plate 80 and connected to the axle, thereby using the air source connector 8 to effectively connect the rotating shaft 3 to the axle.

[0027] In the present application, in order to conveniently install the limit assembly on the rotating shaft 3, the rotating shaft 3 is provided to include an insert shaft section 31 and an assembly step shaft section 32, and the diameter of the assembly step shaft section 32 is larger than the diameter of the insert shaft section 31. And the assembly step shaft section 32 and the insert shaft section 31 are both hollow shafts for ventilation. During installation, the insert shaft section 31 is inserted into the inner hole of the valve body 2, and then the pressure rotary shaft seal 4 is connected to the insert shaft section 31. The limit assembly and the bearing 30 are both installed on the assembly step shaft section 32. The assembly step shaft section 32 is provided with a first limit step 320. One end of the bearing 30 abuts against the first limit step 320, and the other end abuts against the limit assembly, so that both the left and right ends of the bearing 30 are restricted to avoid movement.

[0028] In the present application, the limit assembly provided includes a first retaining ring 5 and a second retaining ring 6, wherein a step stop 200 is provided on the inner hole wall of the valve body 2, the cross section of the first retaining ring 5 is set at a right angle and is located in the inner hole of the valve body 2, one end of the first retaining ring 5 is abutted against the outer ring of the bearing 30, and the other end is abutted against the step stop 200, thereby effectively limiting the position of the bearing 30; then a second limit step 321 is provided on the assembly step shaft section 32 near the bearing 30, the second limit step 321 is concave, the second retaining ring 6 is connected to the second limit step 321, and the second retaining ring 6 is abutted against the inner ring of the bearing 30.

[0029] During the rotation of the wheel, the valve body 2 also rotates. At this time, the first limiting step 320 limits the position of the right end of the bearing 30, and then the first retaining ring 5 limits the position of the outer ring of the left end of the bearing 30, and the second retaining ring 6 limits the position of the inner ring of the left end of the bearing 30. The first retaining ring 5 and the second retaining ring 6 limit the bearing 30, which can ensure the stability of the bearing 30 and prevent the bearing 30 from moving while minimizing the influence of the limiting component on the friction force of the bearing 30.

[0030] In the present application, a valve cover 20 is also connected to the valve body 2. The valve cover 20 is located outside the hub cover 1. Other wheel side systems can be connected through the valve cover 20. The valve cover 20 prevents the valve body 2 from being exposed as a whole, so that the valve body 2 is internally arranged. Compared with the conventional externally arranged valve body 2, the present application has a valve body 2 installation that can be applied to more vehicle models and has a wide range of uses. A first mounting screw 21 is connected between the valve cover 20 and the valve body 2. The valve cover 20 can be conveniently connected to the valve body 2 through the first mounting screw 21, which is easy to install and has a reliable structure.

[0031] In the present application, a hub cover 1 pressure plate is connected to the valve body 2 in the inner hole of the hub cover 1, and a second mounting screw 70 is connected between the hub cover 1 pressure plate and the valve cover 20. The second mounting screw 70 is located in the inner hole of the hub cover 1, thereby connecting the hub cover 1 pressure plate by reverse built-in installation, thereby improving the connection strength between the valve cover 20 and the hub cover 1.

[0032] In the present application, in order to further improve the sealing performance of the valve body 2 and prevent water vapor from entering the valve body 2 when not in operation, when the valve body 2 is installed, one end of the valve body 2 is passed through the valve cover 20, and a first sealing ring 22 is connected around the valve body 2. In this embodiment, at least two first sealing rings 22 are provided. The first sealing rings 22 are preferably O-shaped sealing rings, which have a simple structure and good sealing effect.

[0033] In the present application, a second sealing ring 23 is connected around the portion of the valve body 2 passing through the valve cover 20. The second sealing ring 23 is preferably an O-ring, which is used to strengthen the connection between the valve body 2 and the valve cover 20 and further improve the sealing effect.

[0034] In addition, a third sealing ring 71 is provided between the outer side of the hub cover 1 and the valve cover 20. The third sealing ring 71 is preferably an O-ring for strengthening the connection between the hub cover 1 and the valve cover 20 and enhancing the sealing performance of the connection.

[0035] In the present application, since the rotating shaft 3 is connected to the axle, in order to prevent dust from entering the valve body 2, a dustproof sealing ring 9 is also connected to the rotating shaft 3 near the axle. The dustproof sealing ring 9 includes but is not limited to a Y-type sealing ring. The dustproof sealing ring 9 fits with the inner hole of the valve body 2 and has a good dustproof effect.

[0036] The implementation principle of the embodiment of the present application is: when the wheel rotates, the rotating shaft 3 and the air source connector 8 remain stationary, and the remaining parts rotate accordingly. The pressure rotary shaft seal 4, the first retaining ring 5, the second retaining ring 6 and the bearing 30 ensure the relative stability of the position of the valve body 2 during rotation; in this case, the inner and outer mounting surfaces of the dustproof sealing ring 9 are in coaxial rotation, generating stable sliding friction, and the pressure rotary shaft seal 4 has a long and stable service life under this usage state.

[0037] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0038] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0039] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A single-channel rotary sealing device assembly, characterized in that: include: Hubcap (1); A valve body (2) mounted in the inner hole of the hub cover (1); A rotating shaft (3), one end of which is connected to the axle, and the other end of which is connected to the inner hole of the valve body (2); a bearing (30) is provided on the rotating shaft (3); and the inner hole wall of the valve body (2) is connected to the bearing (30); A pressure rotary shaft seal (4) connected to an end of the rotary shaft (3) away from the axle, the pressure rotary shaft seal (4) being located in the inner hole of the valve body (2); A limiting assembly is connected to the rotating shaft (3) and is used to limit the position of the bearing (30).

2. A single-channel rotary sealing device assembly according to claim 1, characterized in that: The rotating shaft (3) comprises an insert shaft section (31) and an assembly step shaft section (32); the insert shaft section (31) is inserted into the inner hole of the valve body (2); the pressure rotary shaft seal (4) is connected to the insert shaft section (31); the limit assembly and the bearing (30) are both mounted on the assembly step shaft section (32); a first limit step (320) is provided on the assembly step shaft section (32); one end of the bearing (30) abuts against the first limit step (320) and the other end abuts against the limit assembly.

3. A single-channel rotary sealing device assembly as claimed in claim 2, characterized in that: The limiting component comprises: A first retaining ring (5), a step retaining portion (200) being provided on the inner hole wall of the valve body (2), one end of the first retaining ring (5) abutting against the outer ring of the bearing (30), and the other end abutting against the step retaining portion (200); A second retaining ring (6), a second limiting step (321) is provided on the assembly step shaft section (32) near the bearing (30), the second retaining ring (6) is connected inside the second limiting step (321), and the second retaining ring (6) abuts against the inner ring of the bearing (30).

4. A single-channel rotary sealing device assembly according to claim 1, characterized in that: The valve body (2) is connected to a valve cover (20), the valve cover (20) is located outside the hub cover (1), and a first mounting screw (21) is connected between the valve cover (20) and the valve body (2).

5. A single-channel rotary sealing device assembly as claimed in claim 4, characterized in that: A hub cover (1) pressure plate is connected to the valve body (2) in the inner hole of the hub cover (1), and a second mounting screw (70) is connected between the hub cover (1) pressure plate and the valve cover (20).

6. A single-channel rotary seal assembly as claimed in claim 4, characterized in that: One end of the valve body (2) passes through the valve cover (20), and is connected to a first sealing ring (22) surrounding the valve body (2).

7. A single-channel rotary seal assembly as claimed in claim 6, characterized in that: A second sealing ring (23) is connected around a portion of the valve body (2) that passes through the valve cover (20).

8. A single-channel rotary sealing device assembly as claimed in claim 4, characterized in that: A third sealing ring (71) is provided between the outer side of the hub cover (1) and the valve cover (20).

9. A single-channel rotary sealing device assembly according to claim 1, characterized in that: An air source connector (8) is connected to one end of the rotating shaft (3) close to the axle, and a connecting plate (80) is also provided on the valve body (2). The air source connector (8) passes through the connecting plate (80) and is connected to the axle.

10. A single-channel rotary sealing device assembly according to claim 1, characterized in that: A dustproof sealing ring (9) is also connected to the rotating shaft (3) near the axle, and the dustproof sealing ring (9) fits with the inner hole of the valve body (2).

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