Tire inflation structure of axle and axle

Abstract

The utility model discloses a tire inflation structure of an axle and the axle. The tire inflation structure of the axle comprises a shaft head, a hub, a first pipeline and a second pipeline, the hub is pivoted to the shaft head through a bearing, an extension section is arranged at the inner side end of the hub, a mounting gap is formed between the extension section and the outer edge face of the shaft head, a first sealing ring and a second sealing ring are arranged in the mounting gap, and the first sealing ring and the second sealing ring seal the two ends of the mounting gap so as to jointly define a closed cavity with the mounting gap. The inner edge of the second sealing ring is fixedly connected to the shaft head, and the outer edge is hermetically matched with the inner surface of the extension section; one end of the first pipeline is connected with an air source of the vehicle, and the other end penetrates through the second sealing ring to communicate with the closed cavity; one end of the second pipeline is fixed on the extension section and is communicated with the closed cavity, and the other end of the second pipeline is communicated with an inner cavity of a tire mounted on the hub. The structure of the axle wheel end is simplified, the installation difficulty of the axle wheel end is reduced, and the axle is easy to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle chassis parts, in particular to a tire inflation structure of an axle and the axle. Background Art

[0002] The axle tires of ordinary commercial vehicles cannot be automatically inflated during vehicle movement. If a tire leaks during vehicle driving, it will lead to low tire pressure and even safety accidents. In order to overcome this defect and improve the safety of commercial vehicle driving, some axles are equipped with automatic inflation structures. The inflation structure automatically replenishes gas into the tire based on the pressure value obtained by real-time detection of the internal pressure of the tire, thereby achieving the purpose of automatic inflation; however, the axle and the vehicle chassis remain fixed, and the tire is installed on the wheel hub at the end of the axle, which rotates relative to the axle. The automatic inflation structure must be equipped with a relatively complex rotating sealing structure to input gas from the gas source on the vehicle into the tire. The relatively complex sealing structure leads to a relatively complex axle wheel end structure and is difficult to install, which increases the difficulty of maintaining the axle wheel end. Utility Model Content

[0003] In view of the deficiencies of the prior art, the first object of the utility model is to provide a tire inflation structure for an axle, which has a simple structure, reduces the difficulty of installing the axle wheel end, and makes the axle easy to maintain.

[0004] The second purpose of the utility model is to provide a vehicle axle.

[0005] In order to achieve the above purpose one, the utility model adopts the following technical solution:

[0006] A tire inflation structure of an axle, comprising an axle head, a wheel hub, a first pipeline, and a second pipeline;

[0007] The wheel hub is pivotally connected to the shaft head through the bearing, and an extension section protruding inwardly from the bearing is arranged at the inner end of the wheel hub, and an installation gap is formed between the extension section and the outer edge surface of the shaft head. A first sealing ring located on the inner side of the bearing and a second sealing ring located on the inner side of the first sealing ring and spaced apart from the first sealing ring are arranged in the installation gap. The first sealing ring and the second sealing ring seal both ends of the installation gap to form a closed chamber together with the installation gap, and the inner edge of the second sealing ring is fixedly connected to the shaft head, and the outer edge is tightly matched with the inner surface of the extension section;

[0008] One end of the first pipeline is connected to the air source of the vehicle, and the other end passes through the second sealing ring and communicates with the closed chamber; one end of the second pipeline is fixed on the extension section and communicates with the closed chamber, and the other end communicates with the inner cavity of the tire installed on the wheel hub.

[0009] The first sealing ring is an oil seal installed between the extension section and the shaft head for isolating the closed chamber and the bearing.

[0010] The hub is provided with a joint protruding outward from the outer edge of the extension section, the inner end of the joint is connected to the closed chamber, one end of the second pipeline is inserted into the joint from the outer end of the joint so that the one end of the second pipeline is connected to the closed chamber, and the second pipeline is provided with a sealed sealing flange pressed on the outer end surface of the joint.

[0011] A connecting flange is arranged on the periphery of the hub, a through hole is arranged on the connecting flange for the second pipeline to pass through, a connecting piece is fixed on the outside of the second pipeline, the connecting piece is embedded in the through hole and is snap-fitted with the inner wall of the through hole.

[0012] A tee is provided at the other end of the second pipeline, one interface of the tee is connected to the other end of the second pipeline, and the other two interfaces of the tee are respectively connected to the inner cavities of two tires installed on the wheel hub.

[0013] The second sealing ring is provided with a mounting hole extending from one end face to the other end face. The other end of the second pipeline is connected to the mounting hole to connect the other end of the first pipeline with the closed chamber. The second pipeline is provided with a sealing boss pressed on the second sealing ring.

[0014] In order to achieve the above-mentioned second purpose, the utility model adopts the following technical solutions:

[0015] A vehicle axle comprises the tire inflation structure of the vehicle axle.

[0016] The beneficial effects of the utility model are:

[0017] In the utility model, an extension section protruding from the bearing is provided on the inner side of the wheel hub, so that an installation gap is formed between the extension section and the shaft head, a first sealing ring and a second sealing ring are installed in the installation gap, the second sealing ring and the shaft head are kept fixed, the first pipeline is fixed to the second sealing ring, the second pipeline is fixed to the extension section, and the relatively rotating first pipeline and the second pipeline are connected through a closed chamber, so that gas can enter the tire through the first pipeline, the closed chamber, and the second pipeline to inflate the tire. In this way, the structure of the axle wheel end is simplified, the difficulty of installing the axle wheel end is reduced, and the axle is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 for Figure 1 Magnified view at A in the middle. DETAILED DESCRIPTION

[0020] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0021] like Figure 1 , 2 As shown, a tire inflation structure of a vehicle bridge of the utility model is provided, which includes an axle head 10, a wheel hub 20, a first pipeline 30, and a second pipeline 40, wherein the axle head 10 is located at the end of the vehicle bridge, and the wheel hub 20 is pivotally connected to the axle head 10 through a bearing 22, so that the wheel hub 20 can rotate relative to the axle head 10, and an extension section 21 protruding from the bearing 22 is provided at the inner end of the wheel hub 20, and an installation gap is formed between the part of the extension section 21 located on the inner side of the bearing 22 and the outer edge surface of the axle head 10, and a first sealing ring 50 and a second sealing ring 60 are provided in the installation gap, wherein the first sealing ring 50 is located on the inner side of the bearing 22, and the second sealing ring 60 is located between the inner end of the extension section 21 and the axle head 10, so that the second sealing ring 60 and the first sealing ring 50 are arranged along the axle head 10 is axially staggered by a certain distance, that is, the second sealing ring 60 and the first sealing ring 50 are arranged in the installation gap at intervals. In this way, the first sealing ring 50 and the second sealing ring 60 are respectively located at the two ends of the installation gap, thereby forming a sealed chamber B together with the installation gap. The inner edge of the second sealing ring 60 is fixedly connected to the shaft head 10, so that the second sealing ring 60 is relatively fixed to the shaft head 10 and rotates relatively with the wheel hub 20, and the outer edge of the second sealing ring 60 is tightly matched with the inner surface of the extension section 21; one end of the first pipeline 30 is connected to the air source of the vehicle, and the other end passes through the second sealing ring 60 and is connected to the closed chamber B. One end of the second pipeline 40 is fixed on the extension section 21 and is connected to the closed chamber B, and the other end is connected to the inner cavity of the tire installed on the wheel hub 20.

[0022] In the utility model, an extension section protruding from the bearing is provided on the inner side of the wheel hub, so that an installation gap is formed between the extension section and the shaft head, a first sealing ring and a second sealing ring are installed in the installation gap, the second sealing ring and the shaft head are kept fixed, the first pipeline is fixed to the second sealing ring, the second pipeline is fixed to the extension section, and the relatively rotating first pipeline and the second pipeline are connected through a closed chamber, so that gas can enter the tire through the first pipeline, the closed chamber, and the second pipeline to inflate the tire. In this way, the structure of the axle wheel end is simplified, the difficulty of installing the axle wheel end is reduced, and the axle is easy to maintain.

[0023] In a preferred embodiment, the first sealing ring 50 is an oil seal installed between the extension section 21 and the shaft head 10. The oil seal is used to isolate the closed chamber B and the bearing 22 to prevent the gas in the closed chamber B from entering the bearing 22, and at the same time prevent the lubricating oil in the bearing 22 from entering the closed chamber B.

[0024] A joint 23 protruding outward from the outer edge of the extension section 21 is provided on the hub 20, and the inner end of the joint 23 is connected to the closed chamber B. One end of the second pipeline 40 is inserted into the joint 23 from the outer end of the joint 23, so that one end of the second pipeline 40 is connected to the closed chamber B. A sealing flange 41 is provided on the second pipeline 40, and the sealing flange 41 is pressed on the outer end surface of the joint 23. The sealing flange 41 ensures that the connection between the second pipeline 40 and the joint 23 has better sealing performance, thereby preventing air leakage at the connection between the joint 23 and the second pipeline 40. In order to prevent the second pipeline 40 from loosening and enable the second pipeline 40 to stably transmit gas, a connecting flange 24 is provided on the periphery of the hub 20. The connecting flange 24 is provided with a through hole for the second pipeline 40 to pass through. A connecting piece 42 fixed to the second pipeline 40 is sleeved on the second pipeline 40. The connecting piece 42 is inserted into the through hole, and the connecting piece 42 is snap-fitted with the inner wall of the through hole, so that the second pipeline 40 is fixedly connected to the hub 20.

[0025] A tee piece 41 is provided at the other end of the second pipeline 40, one of the interfaces of the tee piece 41 is connected to the second pipeline 40, and the other two interfaces of the tee piece 41 are respectively connected to the inner cavities of two tires installed on the wheel hub 20. In this way, the tire inflation structure of the utility model can be suitable for vehicles with two tires configured at the wheel ends.

[0026] In another preferred embodiment, a mounting hole 61 is provided on the second sealing ring 60, and the mounting hole 61 extends from one end surface of the second sealing ring 60 to the other end surface. The other end of the first pipeline 30 is connected to the mounting hole 61, so that the first pipeline 30 is connected with the closed chamber B. A sealing boss 31 is provided on the first pipeline 30, and the sealing boss 31 is pressed on the second sealing ring 60, so that the first pipeline 30 and the second sealing ring 60 have better sealing properties at the fitting point to prevent air leakage.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tire inflation structure for an axle, characterized in that: It includes a shaft head, a wheel hub, a first pipeline, and a second pipeline; The wheel hub is pivotally connected to the shaft head through the bearing, and an extension section protruding inwardly from the bearing is arranged at the inner end of the wheel hub, and an installation gap is formed between the extension section and the outer edge surface of the shaft head. A first sealing ring located on the inner side of the bearing and a second sealing ring located on the inner side of the first sealing ring and spaced apart from the first sealing ring are arranged in the installation gap. The first sealing ring and the second sealing ring seal both ends of the installation gap to form a closed chamber together with the installation gap, and the inner edge of the second sealing ring is fixedly connected to the shaft head, and the outer edge is tightly matched with the inner surface of the extension section; One end of the first pipeline is connected to the air source of the vehicle, and the other end passes through the second sealing ring and communicates with the closed chamber; one end of the second pipeline is fixed on the extension section and communicates with the closed chamber, and the other end communicates with the inner cavity of the tire installed on the wheel hub.

2. The tire inflation structure of the vehicle bridge according to claim 1, characterized in that: The first sealing ring is an oil seal installed between the extension section and the shaft head for isolating the closed chamber and the bearing.

3. The tire inflation structure of the vehicle bridge according to claim 1, characterized in that: The hub is provided with a joint protruding outward from the outer edge of the extension section, the inner end of the joint is connected to the closed chamber, one end of the second pipeline is inserted into the joint from the outer end of the joint so that the one end of the second pipeline is connected to the closed chamber, and the second pipeline is provided with a sealed sealing flange pressed on the outer end surface of the joint.

4. The tire inflation structure of the vehicle bridge according to claim 3, characterized in that: A connecting flange is arranged on the periphery of the hub, a through hole is arranged on the connecting flange for the second pipeline to pass through, a connecting piece is fixed on the outside of the second pipeline, the connecting piece is embedded in the through hole and is snap-fitted with the inner wall of the through hole.

5. The tire inflation structure of the vehicle axle according to claim 1, characterized in that: A tee is provided at the other end of the second pipeline, one interface of the tee is connected to the other end of the second pipeline, and the other two interfaces of the tee are respectively connected to the inner cavities of two tires installed on the wheel hub.

6. The tire inflation structure of the vehicle axle according to claim 1, characterized in that: The second sealing ring is provided with a mounting hole extending from one end face to the other end face. The other end of the second pipeline is connected to the mounting hole to connect the other end of the first pipeline with the closed chamber. The second pipeline is provided with a sealing boss pressed on the second sealing ring.

7. A vehicle axle, characterized in that: A tire inflation structure for an axle comprising the axle according to any one of claims 1 to 6.

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