Hub sealing structure of floating oil seal structure

Abstract

The utility model relates to the field of wheel hub sealing, in particular to a wheel hub sealing structure of a floating oil seal structure, which comprises a bearing seat, an oil seal cover, a floating oil seal, a bearing and a wheel hub shaft, the oil seal cover is fixed at one end of the bearing seat, the wheel hub shaft penetrates through the oil seal cover and then extends into the bearing seat, and an outer ring of the bearing is contacted with the inner wall of the bearing seat. An inner ring of the bearing is in contact with a hub shaft, the floating oil seal comprises a pair of sealing rings which are in contact with each other, each sealing ring is further sleeved with a rubber ring, the two rubber rings are fixedly connected at intervals through a plurality of rubber nails, ring grooves are further formed in the faces, close to each other, of the two rubber rings, and the floating oil seal further comprises an abutting ring. The abutting ring is kept in contact with the two ring grooves. Due to the arrangement of the rubber nails, the positions of the two rubber rings are relatively fixed, and even if force applied by the oil seal cover to the rubber rings is small, the rubber rings can also transmit the force to the sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub sealing, and in particular to a wheel hub sealing structure with a floating oil seal structure. Background Technology

[0002] Wheel hub sealing is a critical step in automotive engineering, essential for protecting wheel hub components from contaminants while retaining lubricant internally. Its primary function is to prevent dirt, water, and other debris from entering the wheel hub, thus avoiding premature wear of bearings and other internal parts. By maintaining proper sealing, these components ensure smooth rotation, reduce friction, and contribute to improved overall efficiency of the vehicle's wheel system.

[0003] Currently, the most common wheel hub sealing method is the floating oil seal, which achieves a seal by compressing a metal ring with two rubber rings and can automatically compensate for shaft eccentricity. However, the sealing effect of the floating oil seal requires a high degree of precision in the contact surface between the metal rings, and the sealing force of the sealing cap must not be reduced. Therefore, it is necessary to improve this structure to overcome the aforementioned shortcomings. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a wheel hub sealing structure with a floating oil seal structure. This utility model is achieved through the following technical solution:

[0005] A hub sealing structure with a floating oil seal includes a bearing housing and an oil seal cover. The oil seal cover is fixed to one end of the bearing housing. The structure also includes a floating oil seal, a bearing, and a hub shaft. The hub shaft extends into the bearing housing after passing through the oil seal cover. The outer ring of the bearing contacts the inner wall of the bearing housing, and the inner ring of the bearing contacts the hub shaft. The floating oil seal includes a pair of sealing rings that are in contact with each other. Each sealing ring is also fitted with a rubber ring. The two rubber rings are fixedly connected at intervals by a number of rubber nails. The surfaces of the two rubber rings that are close to each other are provided with annular grooves. The floating oil seal also includes an abutment ring, which is in contact with both annular grooves.

[0006] In the above technical solution: the bearing housing is used to house the other components; the oil seal cover is used to cooperate with the bearing housing to form a sealed space; the floating oil seal is used to achieve sealing; the bearing is used to ensure smooth rotation of the wheel hub shaft; a pair of sealing rings achieve floating sealing by abutting against each other; the rubber ring applies force to the sealing rings through elasticity, thereby ensuring that the sealing rings are in contact with each other; the rubber pin is used to ensure the distance between the two rubber rings, so that even when the sealing force provided by the oil seal cover is small, a considerable sealing performance can still be maintained; the ring groove is used to accommodate the abutting ring; the setting of the abutting ring prevents the inner ring of the two rubber rings from turning outward due to the presence of the rubber pin.

[0007] A further feature of this invention is that a convex ring is provided inside the bearing housing, and there are two bearings, which are respectively disposed on both sides of the convex ring, and the outer rings of the two bearings are in contact with the sidewall of the convex ring.

[0008] In the above technical solution: the convex ring is used to set the bearing and restrict the position of the bearing.

[0009] A further feature of this invention is that an end cap is fixedly connected to the end of the hub shaft, the end cap being in contact with the inner ring of one of the bearings, and the inner ring of the other bearing being in contact with the oil seal cover.

[0010] In the above technical solution: the end cap is used to limit the position of the inner ring of one of the bearings, so that the bearing can function.

[0011] A further feature of this invention is that the bearing is a tapered roller bearing.

[0012] In the above technical solution: tapered roller bearings are selected to accommodate the possible axial displacement of the hub shaft.

[0013] A further feature of this invention is that the cross-section of the sealing ring is "L" shaped.

[0014] In the above technical solution: the cross-section of the sealing ring is "L" shaped, which allows for better contact with the rubber ring, and the rubber ring can apply forces in both axial and radial directions to the sealing ring.

[0015] A further feature of this invention is that one sidewall of the rubber ring is in contact with the bearing seat, and the other sidewall of the rubber ring is in contact with the oil seal cover.

[0016] In the above technical solution, the rubber ring contacts both the bearing housing and the oil seal cover simultaneously, allowing the rubber ring to deform fully.

[0017] This utility model discloses a wheel hub sealing structure with a floating oil seal structure, which, compared with the prior art:

[0018] This invention uses rubber nails to fix the position of the two rubber rings, so that the rubber rings and the sealing rings always keep in contact. This means that even if the oil seal cap applies a small force to the rubber rings, the rubber rings can still transmit the force to the sealing rings. Even if the oil seal cap does not apply any force to the rubber rings, the two connected rubber rings themselves can still keep the two sealing rings in contact.

[0019] This invention also features an abutment ring to prevent the inner ring of the two rubber rings from flipping outward due to the tension of the rubber nail, thus further ensuring contact between the rubber rings and the sealing ring. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0021] Figure 2 This is a partially enlarged view of the present invention;

[0022] Figure 3 This is a perspective view of the floating oil seal of this utility model.

[0023] The numbers and letters in the diagram represent the following component names: 10-bearing housing; 101-convex ring; 20-oil seal cover; 30-floating oil seal; 301-sealing ring; 302-rubber ring; 302a-ring groove; 303-rubber nail; 304-abutment ring; 40-bearing; 50-hub shaft; 60-end. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0025] like Figure 1-3 As shown, the present invention proposes a floating oil seal structure for a wheel hub, including a bearing housing 10 and an oil seal cover 20. The oil seal cover 20 is fixed to one end of the bearing housing 10. The structure also includes a floating oil seal 30, a bearing 40, and a wheel hub shaft 50. The wheel hub shaft 50 passes through the oil seal cover 20 and extends into the bearing housing 10. The outer ring of the bearing 40 contacts the inner wall of the bearing housing 10, and the inner ring of the bearing 40 contacts the wheel hub shaft 50. The floating oil seal 30 includes a pair of mutually contacting sealing rings 301. Each sealing ring 301 is also fitted with a rubber ring 302. The two rubber rings 302 are fixedly connected at intervals by several rubber nails 303. The surfaces of the two rubber rings 302 that are close to each other are also provided with annular grooves 302a. The floating oil seal 30 also includes an abutment ring 304, which maintains contact with both annular grooves 302a. The bearing housing 10 is detachably fixed with a top cover at one end away from the oil seal cover 20 to facilitate the installation of components such as the bearing 40 and the end cap 60; a first step is provided on the side of the bearing housing 10 near the end cover, which is used to contact the rubber ring 302; the distance between the groove and the center of the rubber ring 302.

[0026] like Figure 1-3 As shown, the present invention proposes a floating oil seal structure for a wheel hub, wherein a convex ring 101 is provided inside the bearing housing 10, and there are two bearings 40, which are respectively arranged on both sides of the convex ring 101, and the outer rings of the two bearings 40 are in contact with the side wall of the convex ring 101.

[0027] like Figure 1-3 As shown, this utility model proposes a floating oil seal structure for a wheel hub. The end of the wheel hub shaft 50 is fixedly connected to an end head 60. The end head 60 maintains contact with the inner ring of one bearing 40, and the inner ring of the other bearing 40 maintains contact with the oil seal cover 20. The oil seal cover 20 has a C-shaped cross-section. A washer can be provided at the contact point between the oil seal cover 20 and the inner ring of the bearing 40 to reduce friction and provide shock absorption.

[0028] like Figure 1-3 As shown, this utility model proposes a floating oil seal structure for a wheel hub, wherein the bearing 40 is a tapered roller bearing.

[0029] like Figure 1-3 As shown, the present invention proposes a floating oil seal structure for a wheel hub, wherein the sealing ring 301 has an "L" shaped cross section.

[0030] like Figure 1-3 As shown, the present invention proposes a floating oil seal structure for a wheel hub, wherein the sidewall of one rubber ring 302 is in contact with the bearing seat 10, and the sidewall of the other rubber ring 302 is in contact with the oil seal cover 20.

[0031] The working principle of this utility model is as follows:

[0032] a) The hub axle achieves smooth rotation through its connection with the bearing;

[0033] b) When the connection between the oil seal cover and the bearing housing becomes loose due to vibration or other reasons;

[0034] c) The distance between the two rubber rings tends to increase;

[0035] d) The rubber pins separate the two rubber rings, maintaining contact between the rubber rings and the sealing ring, thereby maintaining the force exerted by the rubber rings on the sealing ring;

[0036] e) When the oil seal cap is removed and further loosened;

[0037] f) Due to the pulling of the rubber nails, the contact point between the rubber ring and the sealing ring tends to fold outwards;

[0038] g) The abutment ring avoids this tendency, thus maintaining a seal as much as possible unless the oil seal cap is completely removed.

[0039] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A floating oil seal structure of a hub seal structure comprising a bearing housing (10) and an oil seal cover (20) fixed at one end of the bearing housing (10), characterized in that: The bearing seat (10) is internally provided with a convex ring (101), the number of bearings (40) is two, the two bearings (40) are respectively arranged on the two sides of the convex ring (101), and the outer rings of the two bearings (40) are in contact with the side walls of the convex ring (101).

2. A floating oil seal structure hub seal structure according to claim 1, characterized by: The end of the hub shaft (50) is further fixedly connected with an end head (60), the end head (60) is in contact with the inner ring of one bearing (40), and the inner ring of the other bearing (40) is in contact with the oil seal cover (20).

3. A floating oil seal structure hub seal structure according to claim 2, characterized by: The bearing (40) is a tapered roller bearing.

4. A floating oil seal structure hub seal structure according to claim 3, characterized by: The cross section of the sealing ring (301) is "L" shaped.

5. The floating oil seal structure hub seal structure of claim 1, wherein: The side wall of one rubber ring (302) is in contact with the bearing seat (10), and the side wall of the other rubber ring (302) is in contact with the oil seal cover (20).

6. The hub seal structure of a floating oil seal structure according to claim 1, characterized by: ​

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