Dustproof structure of axle

Abstract

The utility model relates to an axle local structure, in particular to an axle dustproof structure, which comprises an axle housing, a sleeve and a wheel core, a mounting hole is arranged on the wheel core, the sleeve is fixedly connected onto the axle housing and fixedly connected with the axle housing, the sleeve is inserted into the mounting hole, and the wheel core is fixedly connected with the axle housing. A mounting hole is formed in the axle housing, the sleeve is sleeved with a first bearing located in the mounting hole, the sleeve is further sleeved with an oil seal located in the mounting hole, the oil seal is located on the side, facing the axle housing, of the first bearing, and the opening portion, relatively close to the axle housing, of the mounting hole serves as a first opening portion; the unilateral gap between the first opening part and the sleeve is 0.1-2 mm, and a dust accumulation ring groove is formed in the position, located on the side, facing the axle housing, of the first opening part, of the sleeve. The structure provided by the utility model can effectively prevent most gravels from splashing into the mounting hole to collide with the oil seal, and the cost is relatively low because a dust cover or a dust baffle is not required to be arranged.

Description

Technical Field

[0001] The utility model relates to a partial structure of an axle, in particular to a dust-proof structure of an axle. Background Art

[0002] Between the shaft and the hub unit of the axle (front axle or rear axle) of a vehicle, a bearing is usually provided for connection. Since the bearing needs to be lubricated during use, in order to prevent the lubricating oil from leaking, an oil seal is usually provided between the shaft and the hub unit. Since the oil seal is exposed to the air, it is easy to collide with the flying sand and stones during use, affecting its service life. To solve the above problems, many axles are provided with a dust-proof cover or a dust shield to block the sand and stones and prevent the sand and stones from directly colliding with the oil seal. For example, the main reducer oil seal protection structure of the loader drive axle disclosed in the Chinese utility model patent with the authorization announcement number CN217539542U adopts the structure of setting a dust-proof cover.

[0003] Although the structure of setting a dust-proof cover can effectively prevent the sand and stones from directly colliding with the oil seal, however, it will also lead to an increase in the components of the axle, and the installation process of the dust-proof cover needs to be added during assembly, thereby increasing the cost.

[0004] In view of this, the applicant has conducted in-depth research on the dust-proof structure of the axle, and thus this case has arisen. Content of the Utility Model

[0005] The purpose of the utility model is to provide a dust-proof structure of an axle with relatively low cost.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A dust-proof structure of an axle, comprising a bridge housing, a sleeve and a wheel hub. An installation hole is formed in the wheel hub. The sleeve is fixedly connected to the bridge housing and is coaxially arranged with the bridge housing. The sleeve is inserted into the installation hole. A first bearing located in the installation hole is sleeved on the sleeve. An oil seal located in the installation hole is also sleeved on the sleeve. The oil seal is located on the side of the first bearing facing the bridge housing. Taking the opening of the installation hole relatively close to the bridge housing as the first opening, the unilateral gap between the first opening and the sleeve is 0.1-2 mm. The sleeve is provided with a dust accumulation ring groove at a position on the side of the first opening facing the bridge housing.

[0008] As an improvement of the utility model, the sleeve comprises a flange connection part, a dust-proof part, an oil seal installation part, a bearing installation part and a ring gear connection part which are integrally connected in sequence. The flange connection part is fixedly connected to the bridge housing. The dust accumulation ring groove is located in the dust-proof part. The position of the first opening corresponds to the dust-proof part. The oil seal is sleeved on the oil seal installation part. The first bearing is sleeved on the bearing installation part.

[0009] As an improvement of the present utility model, a gear ring is sleeved on the gear ring connecting portion, and a second bearing is provided between the gear ring and the wheel core.

[0010] As an improvement of the present utility model, the outer diameter of the dust-proof portion is greater than or equal to the outer diameter of the oil seal mounting portion, and the outer diameter of the oil seal mounting portion is greater than or equal to the outer diameter of the bearing mounting portion.

[0011] As an improvement of the present utility model, a transition arc surface is provided between the dust-proof portion and the oil seal mounting portion.

[0012] As an improvement of the present utility model, there are two or more oil seals or the oil seal is a double-layer oil seal.

[0013] As an improvement of the present utility model, a sealing ring groove is provided on the end surface of the end of the sleeve facing the axle housing, and a sealing ring that abuts against the axle housing is provided in the sealing ring groove.

[0014] Adopting the above scheme, the present utility model has the following beneficial effects:

[0015] By defining the unilateral gap between the first opening and the sleeve to be 0.1 - 2, most of the sand and gravel can be effectively prevented from splashing into the installation hole and colliding with the oil seal, preventing sundries such as weeds and branches from contacting the oil seal. At the same time, by providing the dust accumulation ring groove, the dust can accumulate in the dust accumulation ring groove and is not likely to flow into the installation hole, reducing the amount of dust entering the installation hole. Moreover, the sand and gravel hitting the sleeve not only do not slide into the installation hole along the surface of the sleeve with difficulty, but will also be thrown out under the action of centrifugal force, with good dust-proof effect. Since there is no need to set a dust-proof cover or dust-proof plate, the cost is relatively low. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the axle dust-proof structure of the present utility model;

[0017] Figure 2 It is a schematic diagram of the sleeve in the present utility model.

[0018] The reference signs in the figures correspond as follows:

[0019] 10 - Axle housing; 20 - Sleeve;

[0020] 21 - First bearing; 22 - Oil seal;

[0021] 23 - Dust accumulation ring groove; 24 - Flange connection portion;

[0022] 25 - Dust-proof portion; 26 - Oil seal mounting portion;

[0023] 27 - Bearing mounting portion; 28 - Gear ring connection portion;

[0024] 29 - sealing ring; 30 - wheel hub

[0025] 31 - mounting hole; 40 - gear ring

[0026] 41 - second bearing Specific embodiments

[0027] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] As Figure 1 - Figure 2 shown, this embodiment provides an axle dust-proof structure, including a axle housing 10, a sleeve 20 and a wheel hub 30. Among them, a mounting hole 31 is provided on the wheel hub 30. One end of the sleeve 20 is fixedly connected to one end of the axle housing 10 by bolts and is coaxially arranged with the axle housing 10, and the sleeve 20 is inserted into the mounting hole 31. Of course, components such as a cover plate are also connected to the end of the sleeve 20 away from the axle housing 10. The half shaft is also inserted into components such as the sleeve 20 and the axle housing 10. The specific connection structure between these components and the sleeve 20 is the same as that of a conventional axle structure, which is not the focus of this embodiment and will not be elaborated here.

[0029] A first bearing 21 located in the mounting hole 31 and a oil seal 22 located in the mounting hole 31 are sleeved on the sleeve 20. Among them, there are more than two oil seals 22 or the oil seal is a double-layer oil seal. In this embodiment, the oil seal 22 is taken as an example of a double-layer oil seal for illustration. The oil seal 22 is located on the side of the first bearing 21 facing the axle housing 10, and is used to prevent the lubricating oil for lubricating the bearing from flowing out of the opening of the mounting hole 31 close to the axle housing 10. For the convenience of description, in this embodiment, the opening of the mounting hole 31 relatively close to the axle housing 10 is taken as the first opening, and the unilateral gap between the first opening and the sleeve 20 is 0.1 - 2 mm, preferably 0.5 mm. In this way, most of the sand and gravel can be effectively prevented from splashing into the mounting hole 31 and colliding with the oil seal 22, that is, the dust-proof effect is achieved by controlling the gap.

[0030] The sleeve 20 is provided with a dust accumulation ring groove 23 at a position on the side of the first opening facing the axle housing 10. In this way, the sleeve 20 forms a step on the outside of the first opening. The dust adsorbed on the surface of the sleeve 20 is not easy to flow into the mounting hole 31 along the axial direction of the sleeve 20. The sand and gravel hitting the sleeve 20 are not only difficult to slide into the mounting hole along the surface of the sleeve 20, but will also be thrown out under the action of centrifugal force. At the same time, the dust accumulation ring groove 23 can be used to accumulate dust.

[0031] Preferably, in this embodiment, the sleeve 20 includes a flange connection portion 24, a dust-proof portion 25, an oil seal installation portion 26, a bearing installation portion 27, and a ring gear connection portion 28 that are integrally connected in sequence. Among them, the flange connection portion 24 is fixedly connected to the axle housing 10, and a sealing structure is provided between the two. Specifically, a sealing ring groove is formed on the end face of the sleeve 20 facing the axle housing 10 (i.e., the end face of the flange connection portion 24), and a sealing ring 29 that abuts against the axle housing 10 is arranged in the sealing ring groove.

[0032] The dust accumulation ring groove 23 is located in the dust-proof portion 25, and the position of the first opening is arranged corresponding to the dust-proof portion 25. The oil seal 22 is sleeved on the oil seal installation portion 26, and the first bearing 21 is sleeved on the bearing installation portion 27. The outer diameter of the dust-proof portion 25 is greater than or equal to the outer diameter of the oil seal installation portion 26, and the outer diameter of the oil seal installation portion 26 is greater than or equal to the outer diameter of the bearing installation portion 27, forming a multi-stage stepped structure, which helps to better protect the oil seal 22 and the first bearing 21, and can also be used as a limiting structure during assembly. In addition, a transition arc surface is provided between the dust-proof portion 25 and the oil seal installation portion 26.

[0033] A ring gear 40 is sleeved on the ring gear connection portion 28 for transmitting power to the wheel side reducer. The specific connection structure between it and the wheel side reducer is a conventional structure and is not the focus of this embodiment, so it will not be elaborated here. A second bearing 41 is provided between the ring gear 40 and the wheel core 30, which can provide better support for the wheel core 30.

[0034] The above has made a detailed description of the present invention in conjunction with the drawings. However, the implementation manners of the present invention are not limited to the above implementation manners. Those skilled in the art can make various equivalent replacements to the present invention according to the prior art, and these all belong to the protection scope of the present invention.

Claims

1. An axle dust-proof structure, comprising an axle housing, a sleeve and a wheel hub. An installation hole is formed in the wheel hub. The sleeve is fixedly connected to the axle housing and coaxially arranged with the axle housing. The sleeve is inserted into the installation hole, and a first bearing located in the installation hole is sleeved on the sleeve. It is characterized in that, An oil seal located within the mounting hole is also sleeved on the sleeve. The oil seal is positioned on the side of the first bearing facing the axle housing. Taking the opening of the mounting hole relatively closer to the axle housing as the first opening, the unilateral clearance between the first opening and the sleeve is 0.1 - 2 mm. A dust accumulation ring groove is provided at the position of the sleeve on the side of the first opening facing the axle housing.

2. The axle dust-proof structure according to claim 1, characterized in that, The sleeve includes a flange connection part, a dust shield part, an oil seal mounting part, a bearing mounting part, and a ring gear connection part that are integrally connected in sequence. The flange connection part is fixedly connected to the axle housing. The dust accumulation ring groove is located in the dust shield part. The position of the first opening is correspondingly arranged with the dust shield part. The oil seal is sleeved on the oil seal mounting part, and the first bearing is sleeved on the bearing mounting part.

3. The axle dust-proof structure according to claim 2, characterized in that, A ring gear is sleeved on the ring gear connection part, and a second bearing is provided between the ring gear and the wheel core.

4. The axle dust-proof structure according to claim 2, characterized in that, The outer diameter of the dust shield part is greater than or equal to the outer diameter of the oil seal mounting part, and the outer diameter of the oil seal mounting part is greater than or equal to the outer diameter of the bearing mounting part.

5. The axle dust-proof structure according to claim 4, wherein, An arc surface is provided between the dust shield part and the oil seal mounting part.

6. The axle dust-proof structure according to any one of claims 1-5, characterized in that There are two or more oil seals or the oil seal is a double-layer oil seal.

7. The axle dust-proof structure according to any one of claims 1-5, characterized in that, A sealing ring groove is provided on the end face of the end of the sleeve facing the axle housing, and a sealing ring that abuts against the axle housing is arranged in the sealing ring groove.

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