Bearing sealing assemblies and wheel hub bearing assemblies containing them, vehicles

Abstract

This invention provides a bearing sealing assembly and a wheel hub bearing assembly and a vehicle having the same. The bearing sealing assembly includes: a frame; an elastic seal, the elastic seal having a first common waist at its bottom end, the first common waist being connected to the top of the frame; the elastic seal including a blocking lip and a first proximal contact lip, both the blocking lip and the first proximal contact lip being connected to the first common waist; the elastic seal further includes a second common waist, a second proximal contact lip, and a contact lip edge connected to the first common waist, the contact lip edge and the second proximal contact lip both being connected to the second common waist; wherein, the extended end of the contact lip edge is interference-fitted with the outer ring, and the extended ends of the first and second proximal contact lips are both provided with a gap from the outer ring. This application solves the problem of high production cost of bearing sealing assemblies in the prior art.

Description

Technical Field

[0001] This invention relates to the field of bearing seal design technology, and more specifically, to a bearing seal assembly and a wheel hub bearing assembly having the same, and a vehicle. Background Technology

[0002] Existing wheel hub bearing seals consist of a skeleton, a lip seal, and an oil slinger. For example... Figure 1 As shown, the lip seal has a dust lip, a main lip, and a centrifugal lip. This traditional seal with an oil slinger ring is used to prevent contamination and slurry from entering the bearing. However, manufacturing such an oil slinger ring requires high precision, demanding low surface roughness and high dimensional accuracy, resulting in very high costs. However, with increasingly fierce competition in the new energy electric vehicle market, there is an urgent need to develop a cheaper seal.

[0003] There is currently no effective solution to the aforementioned problems with existing technologies. Summary of the Invention

[0004] The main objective of this invention is to provide a bearing sealing assembly and a wheel hub bearing assembly and vehicle having the same, so as to solve the problem of high production cost of bearing sealing assemblies in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a bearing sealing assembly is provided, comprising: a skeleton, the bottom of which is fitted with the inner ring of a hub bearing, and the top of which extends toward the outer ring of the hub bearing; and an elastic seal, the bottom end of which has a first common waist, the first common waist being connected to the top of the skeleton, the elastic seal including a blocking lip and a first proximal contact lip, both the blocking lip and the first proximal contact lip being connected to the first common waist, the blocking lip and the first proximal contact lip being located on opposite sides of the portion of the first common waist extending radially along the hub bearing, the blocking lip and the first proximal contact lip being respectively located on both sides of the portion of the first common waist extending radially along the hub bearing. Both the lip and the first proximal contact lip extend toward the outer ring; the elastic seal also includes a second common waist connected to the first common waist, a second proximal contact lip, and a contact lip edge. The contact lip edge and the second proximal contact lip are both connected to the second common waist. The contact lip edge and the second proximal contact lip are respectively located on both sides of the portion of the second common waist extending along the radial direction of the wheel hub bearing. Both the contact lip edge and the second proximal contact lip extend toward the outer ring; wherein, the extended end of the contact lip edge is interference-fitted with the outer ring, and the extended ends of the first proximal contact lip and the extended ends of the second proximal contact lip are both provided with a gap from the outer ring.

[0006] Furthermore, the central axis of the first common waist and the central axis of the second common waist are both set to coincide with the central axis of the frame, and the central axis of the frame coincides with the radial direction of the wheel hub bearing.

[0007] Furthermore, the extended ends of the first proximal contact lip, the extended ends of the blocking lip, the extended ends of the contact lip edge, and the extended ends of the second proximal contact lip all extend along a first direction, which is the direction away from the balls of the hub bearing.

[0008] Furthermore, a first water inlet cavity is formed between the bottom surface of the blocking lip and part of the skeleton, and a second water inlet cavity is formed between the top surface of the blocking lip and the edge of the contact lip.

[0009] Furthermore, the first proximal contact lip has a first disengagement position with a gap from the outer ring and a first working position abutting against the outer ring; the second proximal contact lip has a second disengagement position with a gap from the outer ring and a second working position abutting against the outer ring. When liquid enters from the first water inlet chamber, the second proximal contact lip is located in the second working position and the first proximal contact lip is located in the first disengagement position; when liquid enters from the second water inlet chamber, the second proximal contact lip is located in the second working position and the first proximal contact lip is located in the first working position.

[0010] Furthermore, the first proximal contact lip includes: a first lip segment connected to a first common waist; a second lip segment, one end of which is connected to the first lip segment, the other end of which forms an extension of the first proximal contact lip, the second lip segment and the first lip segment having a first preset angle between them, and the length of the second lip segment being greater than the distance from the connection point of the first lip segment and the second lip segment to the outer ring.

[0011] Furthermore, the second proximal contact lip includes: a third lip segment, which is connected to the first common waist; a fourth lip segment, one end of which is connected to the third lip segment, and the other end of which forms an extension of the second proximal contact lip. The fourth lip segment and the third lip segment have a second preset angle between them, and the length of the fourth lip segment is greater than the distance from the connection point of the third lip segment and the fourth lip segment to the outer ring.

[0012] Furthermore, a connecting groove is provided at the bottom of the first common waist, and the top of the frame is located in the connecting groove.

[0013] According to one aspect of the present invention, a hub bearing assembly is provided, including a bearing seal assembly, wherein the bearing seal assembly is the bearing seal assembly described above.

[0014] According to another aspect of the present invention, a vehicle is provided, including a wheel hub bearing assembly, the wheel hub bearing assembly being the wheel hub bearing assembly described above.

[0015] Applying the technical solution of this invention, both the blocking lip and the first proximal contact lip are connected to the first common waist, meaning the blocking lip and the first proximal contact lip share the first common waist. Furthermore, both the contact lip edge and the second proximal contact lip are connected to the second common waist, meaning the contact lip edge and the second proximal contact lip share the second common waist. Simultaneously, the extended end of the contact lip edge is interference-fitted with the outer ring, while the extended ends of both the first and second proximal contact lips are spaced apart from the outer ring. The number of lips actually performing a sealing function varies under different operating conditions, allowing the bearing sealing assembly to maintain good sealing performance without the need for an oil slinger ring. This also makes each lip more flexible, reducing wear and frictional torque. The technical solution of this application effectively solves the problem of high production costs in existing bearing sealing assemblies. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of a bearing seal assembly according to the prior art is shown;

[0018] Figure 2 A schematic diagram of an embodiment of the bearing sealing assembly according to the present invention is shown.

[0019] The above figures include the following reference numerals:

[0020] 1. Skeleton; 3. First common waist; 4. Second common waist; 5. Second proximal contact lip; 6. Blocking lip; 7. Contact lip edge; 8. First proximal contact lip; 9. Inner ring; 10. Outer ring; 11. Elastic seal; 12. First water inlet chamber; 13. Second water inlet chamber. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0025] Combination Figure 2 As shown, according to a specific embodiment of this application, a bearing sealing assembly is provided.

[0026] The bearing sealing assembly includes: a skeleton 1, the bottom of which fits against the inner ring 9 of the hub bearing, and the top of which extends toward the outer ring 10 of the hub bearing; and an elastic seal 11, the bottom end of which has a first common waist 3, which is connected to the top of the skeleton 1. The elastic seal 11 includes a blocking lip 6 and a first proximity lip 8, both of which are connected to the first common waist 3. The blocking lip 6 and the first proximity lip 8 are located on both sides of the portion of the first common waist 3 extending radially along the hub bearing, and both the blocking lip 6 and the first proximity lip 8 face toward the outer ring. 10. Extended configuration; the elastic seal 11 also includes a second common waist 4, a second proximal contact lip 5, and a contact lip edge 7 connected to the first common waist 3. The contact lip edge 7 and the second proximal contact lip 5 are both connected to the second common waist 4. The contact lip edge 7 and the second proximal contact lip 5 are respectively located on both sides of the portion of the second common waist 4 extending along the radial direction of the wheel hub bearing. The contact lip edge 7 and the second proximal contact lip 5 both extend toward the outer ring 10. The extended end of the contact lip edge 7 is interference-fitted with the outer ring 10, and the extended ends of the first proximal contact lip 8 and the second proximal contact lip 5 are both spaced apart from the outer ring 10.

[0027] By applying the technical solution of this application, both the blocking lip 6 and the first near-contact lip 8 are connected to the first common waist 3, meaning that the blocking lip 6 and the first near-contact lip 8 share the first common waist 3. Furthermore, both the contact lip edge 7 and the second near-contact lip 5 are connected to the second common waist 4, meaning that the contact lip edge 7 and the second near-contact lip 5 share the second common waist 4. Simultaneously, the extended end of the contact lip edge 7 is interference-fitted with the outer ring 10, while the extended ends of the first near-contact lip 8 and the second near-contact lip 5 are spaced apart from the outer ring 10. The number of lips actually performing a sealing function varies under different operating conditions, allowing the bearing sealing assembly to maintain good sealing performance without the need for an oil slinger ring. This also makes each lip more flexible, reducing wear and frictional torque. The technical solution of this application effectively solves the problem of high production costs for bearing sealing assemblies in the prior art.

[0028] With the current popularity of new energy electric vehicles, range performance is a crucial criterion for vehicle quality, thus requiring the lowest possible steering torque for wheel hub bearings. The challenge lies in achieving lower frictional torque and lower cost in bearing sealing assemblies while maintaining a tight seal. This application provides a low-friction, high-performance, and low-cost bearing sealing assembly. By sharing different waist structures for different sealing lips, all sealing lips can be made more flexible, reducing wear and frictional torque. When the sealing lips encounter water, the proximal contact lips (first proximal contact lip 8, second proximal contact lip 5) automatically transform into contact lips. This seal offers low friction and superior sealing performance at a lower cost, eliminating the need for an oil slinger ring.

[0029] Furthermore, the central axis of the first common waist 3 and the central axis of the second common waist 4 are both aligned with the central axis of the frame 1, and the central axis of the frame 1 is aligned with the radial direction of the wheel hub bearing. This arrangement ensures that the entire elastic seal 11 is securely installed, thereby guaranteeing the sealing performance between the inner and outer rings.

[0030] Furthermore, the extended ends of the first proximal contact lip 8, the blocking lip 6, the contact lip edge 7, and the second proximal contact lip 5 all extend along a first direction, which is the direction away from the balls of the hub bearing. Figure 2 The first common waist 3 shown in the figure serves as a reference point, and the first direction is the upper right direction. This configuration prevents external water from entering around the ball bearings.

[0031] Furthermore, a first water inlet cavity 12 is formed between the bottom surface of the blocking lip 6 and part of the skeleton, and a second water inlet cavity 13 is formed between the top surface of the blocking lip 6 and the contact lip edge 7. By dividing the water inlet cavities, different water inlet volumes are actually accommodated, thus corresponding to different usage environments and improving the overall practicality of the component.

[0032] like Figure 2 As shown, both the blocking lip 6 and the first proximal contact lip 8 are connected to the first common waist 3, meaning that the blocking lip 6 and the first proximal contact lip 8 share the first common waist 3. The first common waist 3 is connected to the second common waist 4, meaning that all lips share the first common waist 3. Similarly, both the contact lip edge 7 and the second proximal contact lip 5 are connected to the second common waist 4, meaning that the contact lip edge 7 and the second proximal contact lip 5 share the second common waist 4. Therefore, the two will have different operating states.

[0033] Under normal operating conditions (i.e., without water), the contact lip 7 is a true contact lip, which will have a small frictional torque while providing good sealing performance when the elastic seal 11 rotates.

[0034] Furthermore, the first proximal contact lip 8 has a first disengagement position with a gap from the outer ring 10, and a first working position abutting against the outer ring 10; the second proximal contact lip 5 has a second disengagement position with a gap from the outer ring 10, and a second working position abutting against the outer ring 10. When liquid enters from the first water inlet chamber 12, the second proximal contact lip 5 is in the second working position and the first proximal contact lip 8 is in the first disengagement position; when liquid enters from the second water inlet chamber 13, the second proximal contact lip 5 is in the second working position and the first proximal contact lip 8 is in the first working position.

[0035] When the resilient seal 11 comes into contact with water, the second proximal contact lip 5 and the first proximal contact lip 8 will optionally become contact lips to improve sealing performance. Specifically, when water enters from the first inlet chamber 12, under the action of water pressure, all the sealing lips will rotate counterclockwise, so the contact lip edge 7 will contact the outer ring more tightly, and the second proximal contact lip 5 will become a true contact lip to improve sealing performance and prevent water from entering the bearing. In this case, most of the water will be collected by the lower surface of the blocking lip 6 and then guided away from the contact lip edge 7. When water is poured into the space between the blocking lip 6 and the contact lip edge 7 (i.e., the second inlet chamber 13), the water pressed on the lower surface of the contact lip edge 7 will push the second proximal contact lip 5 and the contact lip edge 7 to rotate counterclockwise, which will push the contact lip edge 7 more tightly on the outer ring, and the second proximal contact lip 5 will become a true contact lip. At the same time, the water pressure on the upper surface of the blocking lip 6 will push the blocking lip 6 and the first proximal contact lip 8 to rotate clockwise, which will make the first proximal contact lip 8 a true contact lip. In this case, there are three true contact lips to improve sealing performance. All these features and functions ensure that the resilient seal 11 has low friction and super sealing performance, but at a lower cost due to the elimination of an oil slinger ring.

[0036] Furthermore, the first proximal contact lip 8 includes: a first lip segment connected to the first common waist 3; and a second lip segment, one end of which is connected to the first lip segment, and the other end of which forms an extension of the first proximal contact lip 8. The second lip segment and the first lip segment have a first preset angle between them, and the length of the second lip segment is greater than the distance from the connection point of the first and second lip segments to the outer ring 10. This configuration allows the first proximal contact lip 8 to achieve an interference fit with the outer ring during rotation.

[0037] Furthermore, the second proximal contact lip 5 includes: a third lip segment connected to the first common waist 3; and a fourth lip segment, one end of which is connected to the third lip segment, and the other end of which forms an extension of the second proximal contact lip 5. The fourth lip segment and the third lip segment have a second preset angle between them, and the length of the fourth lip segment is greater than the distance from the connection point of the third and fourth lip segments to the outer ring 10. This configuration allows the second proximal contact lip 5 to achieve an interference fit with the outer ring during rotation.

[0038] Furthermore, a connecting groove is provided at the bottom of the first common waist 3, and the top of the frame 1 is located in the connecting groove.

[0039] According to a specific embodiment of the present invention, a hub bearing assembly is provided, including a bearing sealing assembly, wherein the bearing sealing assembly is the bearing sealing assembly in the above embodiment.

[0040] According to another specific embodiment of the present invention, a vehicle is provided, including a wheel hub bearing assembly, which is the wheel hub bearing assembly in the above embodiment.

[0041] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0042] 1. When the seal comes into contact with water, the near contact lip will automatically become the contact lip, changing from a single lip contact to a triple lip contact, greatly improving the sealing performance.

[0043] 2. The oil slinger ring has been eliminated, reducing the cost of the seals.

[0044] 3. When the sealing ring is working normally, only one sealing lip is in contact, so the seal has low friction characteristics.

[0045] 4. The sealing structure is very compact, highly feasible, and suitable for a wide range of applications.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0048] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bearing sealing assembly, characterized in that, include: The frame (1) has its bottom fitted with the inner ring (9) of the hub bearing, and its top extends toward the outer ring (10) of the hub bearing. An elastic seal (11) has a first common waist (3) at its bottom end, which is connected to the top of the frame (1). The elastic seal (11) includes a blocking lip (6) and a first proximal contact lip (8), both of which are connected to the first common waist (3). The blocking lip (6) and the first proximal contact lip (8) are located on both sides of the portion of the first common waist (3) extending radially along the hub bearing. The elastic seal (11) extends toward the outer ring (10); the elastic seal (11) also includes a second common waist (4), a second near contact lip (5), and a contact lip edge (7) connected to the first common waist (3). The contact lip edge (7) and the second near contact lip (5) are both connected to the second common waist (4). The contact lip edge (7) and the second near contact lip (5) are respectively located on both sides of the second common waist (4) extending in the radial direction of the wheel hub bearing. The contact lip edge (7) and the second near contact lip (5) both extend toward the outer ring (10). Wherein, the extended end of the contact lip (7) is press-fitted with the outer ring (10), and the extended ends of the first near contact lip (8) and the second near contact lip (5) are both provided with a gap from the outer ring (10). The extension ends of the first proximal contact lip (8), the extension ends of the blocking lip (6), the extension ends of the contact lip edge (7), and the extension ends of the second proximal contact lip (5) are all extended along a first direction, which is the direction away from the ball of the wheel hub bearing. A first water inlet cavity (12) is formed between the bottom surface of the blocking lip (6) and part of the skeleton (1), and a second water inlet cavity (13) is formed between the top surface of the blocking lip (6) and the contact lip (7).

2. The bearing sealing assembly according to claim 1, characterized in that, The central axis of the first common waist (3) and the central axis of the second common waist (4) are both set to coincide with the central axis of the frame (1), and the central axis of the frame (1) coincides with the radial direction of the wheel hub bearing.

3. The bearing sealing assembly according to claim 1, characterized in that, The first proximal contact lip (8) has a first disengagement position with a gap from the outer ring (10) and a first working position abutting against the outer ring (10). The second proximal contact lip (5) has a second disengagement position with a gap from the outer ring (10) and a second working position abutting against the outer ring (10). When liquid enters from the first water inlet chamber (12), the second proximal contact lip (5) is located in the second working position and the first proximal contact lip (8) is located in the first disengagement position. When liquid enters from the second water inlet chamber (13), the second proximal contact lip (5) is located in the second working position and the first proximal contact lip (8) is located in the first working position.

4. The bearing sealing assembly according to claim 1, characterized in that, The first proximal contact lip (8) includes: The first lip segment is connected to the first common waist (3); The second lip segment has one end connected to the first lip segment, and the other end of the second lip segment forms an extension of the first proximal contact lip (8). The second lip segment and the first lip segment have a first preset angle between them. The length of the second lip segment is greater than the distance from the connection point of the first lip segment and the second lip segment to the outer ring (10).

5. The bearing sealing assembly according to claim 1, characterized in that, The second proximal contact lip (5) includes: The third lip segment is connected to the first common waist (3); The fourth lip segment has one end connected to the third lip segment, and the other end of the fourth lip segment forms an extension of the second proximal contact lip (5). The fourth lip segment and the third lip segment have a second preset angle between them. The length of the fourth lip segment is greater than the distance from the connection point of the third lip segment and the fourth lip segment to the outer ring (10).

6. The bearing sealing assembly according to claim 1, characterized in that, The bottom of the first common waist (3) is provided with a connecting groove, and the top of the skeleton (1) is located in the connecting groove.

7. A hub bearing assembly, comprising a bearing sealing assembly, characterized in that, The bearing sealing assembly is the bearing sealing assembly according to any one of claims 1 to 6.

8. A vehicle comprising a wheel hub bearing assembly, characterized in that, The hub bearing assembly is the hub bearing assembly as described in claim 7.

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