Sealing ring, strut bearing assembly, and mounting method

Abstract

A sealing ring (40), a strut bearing assembly (100), and a mounting method. The sealing ring (40) comprises an annular sealing body (41); the sealing body (41) comprises: a sealing lip (42), and an annular sealing plug (43) located at one axial end of the sealing body (41); and in the circumferential direction of the sealing plug (43), both the inner wall and the outer wall of the sealing plug (43) are provided with barbs (44). When the sealing ring (40) seals a strut bearing (30), the sealing plug (43) provided with the barbs (44) on both the outer wall and the inner wall can ensure that the sealing ring (40) can be firmly fixed in one of the housings of the strut bearing (30).

Description

Sealing ring, strut bearing assembly and installation method Technical Field

[0001] The present disclosure relates to the technical field of pillar bearing seals, and in particular to a sealing ring, a pillar bearing assembly, and an installation method. Background Art

[0002] In the related art, a labyrinth sealing method is usually adopted at the edges of the first shell and the second shell supported by the pillar bearing. For example, the edges of the first shell and the second shell cross axially. Under this sealing, the first shell and the second shell do not contact, so there is no friction torque, but the sealing performance is very poor.

[0003] In other related technologies, the seals used to seal the strut bearings are made of thermoplastic elastomer (TPE), which is vulcanized directly onto the plastic strut bearing rings (i.e., the first and second housings). This method is highly complex and expensive to manufacture. Furthermore, because TPE is much harder than rubber, the frictional torque between the first and second housings supported by the strut bearing is very high.

[0004] Summary of the Invention

[0005] To overcome the problems existing in the related art, the present disclosure provides a sealing ring, a strut bearing assembly and an installation method.

[0006] According to a first aspect of an embodiment of the present disclosure, the present disclosure provides a sealing ring, comprising an annular sealing body, the sealing body comprising: a sealing lip; and an annular sealing plug located at one axial end of the sealing body, wherein along the circumference of the sealing plug, the inner wall and the outer wall of the sealing plug are provided with barbs.

[0007] In some embodiments, the barb includes: a first barb surface, the first barb surface is arranged close to the sealing lip, and the angle between the first barb surface and the sealing plug is a first angle; and a second barb surface, the second barb surface is arranged away from the sealing lip, and the angle between the second barb surface and the sealing plug is a second angle, wherein the first angle and the second angle are both obtuse angles, and the first angle is smaller than the second angle.

[0008] In some embodiments, the radial deformation of the sealing plug is 5% to 40%.

[0009] In some embodiments, the outer wall of the sealing plug is provided with multiple circles of axially spaced outer barbs; the inner wall of the sealing plug is provided with multiple circles of axially spaced inner barbs; wherein the outer barbs and the inner barbs correspond to each other in the axial direction.

[0010] In some embodiments, the sealing lips are respectively provided at both radial ends of the sealing body, and the bending directions of the sealing lips are the same.

[0011] In some embodiments, the sealing ring is integrally formed of rubber material.

[0012] According to a second aspect of an embodiment of the present disclosure, the present disclosure provides a strut bearing assembly, comprising: a first shell; a second shell, wherein the second shell is provided with an annular plug hole near the end face of the first shell; a bearing, axially supported between the first shell and the second shell, for enabling relative rotation between the first shell and the second shell; and a sealing ring as described in the first aspect, wherein the sealing plug of the sealing ring is plugged into the annular plug hole of the second shell, and the sealing lip of the sealing ring is in dynamic sealing contact with the first shell.

[0013] In some embodiments, the ratio of the radial dimension of the annular plug hole to the radial dimension of the sealing plug ranges from 60% to 95%.

[0014] In some embodiments, the sealing ring includes: a first sealing ring, the first sealing ring being located radially outside the bearing; and / or a second sealing ring, the second sealing ring being located radially inside the bearing.

[0015] In some embodiments, the sealing lip of the first sealing ring is a radial sealing lip, and the sealing lip of the second sealing ring is an axial sealing lip.

[0016] According to the third aspect of the embodiment of the present disclosure, the present disclosure provides an installation method for installing the pillar bearing assembly as described in the second aspect, comprising the following steps: Step 1: Fix the inner ring of the pillar bearing on the second shell, and install the roller and outer ring in sequence; Step 2: Insert the sealing plug of the sealing ring into the annular plug hole of the second shell, and the sealing lip of the sealing ring is located outside the annular plug hole; Step 3: axially buckle the first shell on the outer ring of the pillar bearing, and dynamically seal with the sealing lip of the sealing ring, wherein the execution order of Step 1 and Step 2 is not particular.

[0017] In some embodiments, the sealing ring includes a first sealing ring and / or a second sealing ring, and the second housing includes two annular plug holes respectively located radially inside and radially outside the support bearing. In step two, the sealing plug of the first sealing ring is inserted into the annular plug hole located radially outside; and / or the sealing plug of the second sealing ring is inserted into the annular plug hole located radially inside.

[0018] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: when the sealing ring seals the pillar bearing, the sealing plugs with barbs on both the outer wall and the inner wall can ensure that the sealing ring can be firmly fixed in one of the shells of the pillar bearing, preventing the sealing ring from detaching from the shell of the pillar bearing, and ensuring that the sealing ring has good sealing performance and installation performance. The sealing lip is located at the first end of the sealing body and is used for dynamic sealing with the other shell of the pillar bearing. This sealing structure has a small friction torque, and can seal the grease inside the pillar bearing, and keep pollutants and muddy water on the outside of the sealing ring, ensuring that the sealing ring has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] FIG1 is a schematic cross-sectional view of a strut bearing assembly according to an exemplary embodiment.

[0021] FIG2 is a partial enlarged view of portion A in FIG1 .

[0022] FIG3 is a partially enlarged schematic diagram of the sealing plug of the sealing ring in FIG2 . DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0024] In the present invention, unless otherwise specified, the axial direction A, radial direction R, and circumferential direction refer to the axial direction A, radial direction R, and circumferential direction of the sealing ring, respectively; the first end refers to the upper end in Figures 1 and 2, and the second end refers to the lower side in Figures 1 and 2; the radially outer side refers to the side radially away from the central axis O in Figure 1 (the left side in Figure 2), and the radially inner side refers to the side radially closer to the central axis O (the right side in Figure 2). In addition, "torsion-resistant connection" means that torque can be transmitted between two components, and methods for achieving a torque-resistant connection may include interference fit and bolt connection, etc.

[0025] In order to solve the above technical problems, the present disclosure provides a sealing ring 40 , which is applied to a strut bearing assembly 100 , wherein the strut bearing assembly 100 may specifically be a suspension bearing assembly.

[0026] Specifically, as shown in Figures 1 and 2, the strut bearing assembly 100 includes a first housing 10, a second housing 20, a strut bearing 30, and a sealing ring 40. The strut bearing 30 is supported between the first housing 10 and the second housing 20 along the axial direction A, thereby axially spacing the first and second housings 10 and 20. The strut bearing 30 may be a deep groove ball bearing and includes an outer ring 31, an inner ring 32, and rollers 33. The outer ring 31 may be torque-proof connected to the first housing 10, while the inner ring 32 may be fixedly connected to the second housing 20. The relative rotation of the inner ring 32 and the outer ring 31 enables the first and second housings 10 and 20 to rotate relative to each other in the circumferential direction about the central axis O. In this embodiment, the second housing 20 can be considered a fixed housing, and the first housing 10 can be considered a housing that rotates relative to the second housing 20 via the strut bearing 30.

[0027] Furthermore, the sealing ring 40 is used to seal the pillar bearing 30 in the pillar bearing assembly 100. Two sealing rings 40 can be provided, which are respectively located radially outside and radially inside the pillar bearing 30, and are used to seal the grease inside the pillar bearing 30 on both radial sides of the pillar bearing 30 to prevent leakage, and to block pollutants, gravel, sewage, etc. outside the sealing ring 40.

[0028] As shown in Figure 2, the sealing ring 40 includes a sealing body 41, and the sealing body 41 includes a sealing lip 42 and a sealing plug 43. In the axial direction A, the sealing lip 42 can be located at the first end of the sealing body 41 (the upper end as shown in Figure 2), and is used to abut against the first shell 10 of the pillar bearing assembly 100. The sealing lip 42 of the sealing ring 40 disclosed in the present invention can achieve dynamic sealing, which can ensure that the sealing ring 40 has good sealing performance, and at the same time can reduce the friction resistance generated when the first shell 10 and the second shell 20 rotate relative to each other.

[0029] The sealing plug 43 can be fixed to the second end of the sealing body 41 (the lower end as shown in Figure 2). The second shell 20 is provided with an annular plug hole 21 on the end face close to the first shell 10. The sealing plug 43 is fixed in the annular plug hole 21 of the second shell 20 by installation, so that the entire sealing ring 40 is fixed to the second shell 20.

[0030] Furthermore, along the circumference of the entire sealing ring 40 , the inner and outer walls of the sealing plug 43 are provided with barbs 44 . The barbs 44 located on the inner wall of the sealing plug 43 may be inner barbs 441 , and the barbs 44 located on the outer wall of the sealing plug 43 may be outer barbs 442 .

[0031] The barbs 44 of the sealing plug 43 are inclined toward the sealing lip 42. Therefore, when the sealing plug 43 is inserted into the annular plug hole 21 of the second housing 20, the barbs 44 can bend or deform toward the cylindrical body of the sealing plug 43, facilitating the insertion of the sealing plug 43 into the annular plug hole 21. Once the sealing plug 43 is inserted into the annular plug hole 21, the barbs 44 provide axial resistance to the sealing plug 43, preventing the sealing plug 43 from axially separating from the annular plug hole 21. It can be seen that when the sealing ring 40 seals the support bearing 30, the sealing plug 43 with barbs 44 on both the outer and inner walls can ensure that the sealing ring 40 is firmly fixed in the second housing 20 of the support bearing 30, preventing the sealing ring 40 from separating from the second housing 20 of the support bearing 30, and ensuring that the sealing ring 40 has good installation performance.

[0032] It should be noted that the terms "first" and "second" are used to describe various structures, but these structures should not be limited to these terms. These terms are only used to distinguish structures of the same type from each other and do not indicate a specific order or degree of importance. In fact, expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of this disclosure, the first shell 10 can also be referred to as the second shell 20, and similarly, the second shell 20 can also be referred to as the first shell 10.

[0033] In addition, the sealing lip 42 of the sealing ring 40 of the present invention is dynamically sealed with the first shell 10, and the sealing plug 43 is fixed to the second shell 20. In some other embodiments, the sealing plug 43 of the sealing ring 40 can be fixed to the first shell 10 to dynamically seal the sealing lip 42 with the second shell 20, which will not be repeated here.

[0034] In this embodiment, as shown in FIG. 3 , the barb 44 includes a first barb surface 443 and a second barb surface 444 .

[0035] Among them, the first barb surface 443 is arranged close to the sealing lip 42, and the angle between the first barb surface 443 and the sealing plug 43 is a first angle α; the second barb surface 444 is arranged away from the sealing lip 42, and the angle between the second barb surface 444 and the sealing plug 43 is a second angle β, wherein the first angle α and the second angle β are both obtuse angles, and the first angle α is smaller than the second angle β.

[0036] In this embodiment, the first angle α is also obtuse, which increases the size of the connection between the barb 44 and the cylindrical body of the sealing plug 43, preventing the barb 44 from bending or breaking. Furthermore, the obtuse first angle α makes the barb 44 more flat. When the sealing plug 43 is inserted into the plug hole 21 of the second housing 20, the barb 44 is more easily compressed in the radial direction, achieving elastic deformation in the radial direction R, allowing the sealing plug 43 to better abut against the plug hole 21 and increasing the connection strength between the sealing plug 43 and the plug hole 21.

[0037] At the same time, the radial deformation of the sealing plug 43 = (W2 - W1) / W2, where the deformation ranges from 5% to 40%. As shown in Figure 3, W2 is the initial width of the sealing plug 43 with the barbs 44, and W1 is the inner diameter of the annular plug hole 21. This deformation ensures that the structure of the sealing plug 43 is not damaged and also improves the sealing performance of the sealing ring 40. Similarly, when the sealing plug 43 is inserted into the annular plug hole 21, the ratio of the radial dimension of the annular plug hole 21 to the radial dimension of the sealing plug 43 ranges from 60% to 95%.

[0038] In this embodiment, the outer wall of the sealing plug 43 is provided with multiple circles of outer barbs 442 spaced apart in the axial direction A, and the inner wall of the sealing plug 43 is provided with multiple circles of inner barbs 441 spaced apart in the axial direction A. That is, the inner barbs 441 and outer barbs 442 in this embodiment are annular, rather than scattered on the inner or outer walls of the sealing plug 43. This improves the toughness and strength of the barbs 44, making them less susceptible to breakage.

[0039] Furthermore, in this embodiment, the outer barbs 442 and the inner barbs 441 are each provided with three circles, and the three circles of barbs 44 are all provided with equal or unequal intervals along the axial direction. The three circles of outer barbs 442 and inner barbs 441 can make the installation performance and production cost of the sealing ring 40 moderate.

[0040] Furthermore, in this embodiment, as shown in Figures 2 and 3 , the outer barbs 442 and inner barbs 441 are symmetrically arranged. That is, the outer barbs 442 and inner barbs 441 are aligned in the axial direction A, rather than being staggered. The symmetrical arrangement of the outer barbs 442 and inner barbs 441 provides improved sealing performance while also reducing the difficulty of manufacturing the sealing ring 40.

[0041] In some embodiments, a sealing ring 40 is provided on the radially outer side and / or radially inner side of the pillar bearing, that is, the sealing ring 40 can be provided only on the radially outer side of the pillar bearing, or the sealing ring 40 can be provided only on the radially inner side of the pillar bearing, or the sealing ring 40 can be provided on both the radially inner side and the radially outer side of the pillar bearing.

[0042] Furthermore, multiple sealing rings 40 may be provided on the radially outer side of the strut bearing 30 based on sealing requirements. Similarly, multiple sealing rings 40 may also be provided on the radially inner side of the strut bearing 30, and this is not specifically limited herein. Furthermore, the structures of the sealing rings 40 located radially inner and / or outer can be identical or different, and this is not specifically limited herein.

[0043] In this embodiment, as shown in Figures 1 and 2, a sealing ring 40 is provided on the radially outer side and the radially inner side of the strut bearing: a first sealing ring 45 (on the left side as shown in Figure 2) and a second sealing ring 46 (on the right side as shown in Figure 2), and the structures of the first sealing ring 45 and the second sealing ring 46 are different.

[0044] Specifically, the sealing plugs 43 of the first sealing ring 45 and the second sealing ring 46 are the same, but the sealing body and the sealing lip 42 of the first sealing ring 45 are different in structure from the sealing body and the sealing lip 42 of the second sealing ring 46. It should be noted that the structure of the sealing body and the sealing lip of the first sealing ring 45 and the second sealing ring 46 is related to the shape of the channel formed between the first shell 10 and the second shell 20 when the first shell 10 is buckled onto the second shell 20. Therefore, in this embodiment, the structure of the sealing body and the sealing lip of the first sealing ring 45 and the second sealing ring 46 is only exemplary and is not used to limit the scope of protection of the present disclosure. The structure of the sealing body and the sealing lip of the first sealing ring 45 and the second sealing ring 46 may also be different according to the shape of the channel, which is not specifically limited here.

[0045] As shown in Figure 2, in this embodiment, according to the shape of the channel between the first shell 10 and the second shell 20, the sealing body of the first sealing ring 45 is L-shaped, including a radial sealing body 412 and an axial sealing body 411, and the axial sealing body 411 is connected to the radial inner side of the radial sealing body 412.

[0046] The first sealing ring 45 has two sealing lips 42: one located radially outward of the radial sealing body 412, and one located at the upper end of the axial sealing body 411. Furthermore, when installing the entire pillar bearing assembly 100, the inner ring 32 of the pillar bearing 30 can be secured to the second housing 20, and then the roller 33 and outer ring 31 can be installed. Simultaneously, the sealing plug 43 of the sealing ring 40 can be inserted into the annular plug hole 21 of the second housing 20. Finally, the first housing 10 can be axially buckled onto the outer ring 31 of the pillar bearing 30 from top to bottom.

[0047] Among them, the pillar bearing 30 can be torsionally connected to the outer wall of the second shell 20. In this embodiment, the second shell 20 includes a groove for installing the inner ring 32 of the pillar bearing 30. The inner ring 32 is located in the groove of the second shell 20, and the inner ring 32 can be axially limited to avoid axial movement of the pillar bearing 30.

[0048] Since in this embodiment, the sealing ring 40 includes two sealing rings, a first sealing ring 45 and a second sealing ring 46, the second housing 20 also includes two annular plug holes 21, which are respectively located radially inward and radially outward of the inner ring 32 of the pillar bearing 30. The sealing plug 43 of the first sealing ring 45 is inserted into the annular plug hole 21 located radially outward, and the sealing plug 43 of the second sealing ring 46 is inserted into the annular plug hole 21 located radially inward, so that the pillar bearing 30 can be dynamically sealed from both radial sides.

[0049] As shown in Figure 2 , the first housing 10 is axially pressed against the second housing 20, and the radially outer sides of the second housing 20 and the first housing 10 form an axially extending opening. That is, the opening 22 at the edges of the first and second housings 10, 20, extends axially and faces downward (as seen from the bottom in Figure 2 ). The first sealing ring 45 has two sealing lips 42, both of which bend toward the opening 22. That is, both sealing lips 42 are tilted toward the lower left as viewed in Figure 2 . Therefore, the sealing lips 42 of the first sealing ring 45, located radially outward of the strut bearing 30, are radial sealing lips, preventing axial moisture, dust, and other particles from radially invading the strut bearing 30 and preventing radial leakage of grease within the strut bearing 30.

[0050] The inclined direction of the sealing lip 42 shown in Figure 2 is beneficial to preventing dust, gravel or sewage from entering the space surrounded by the first shell 10 and the second shell 20 through the opening 22. The sealing lip 42 is inclined toward the opening 22, which facilitates the first shell 10 to be snapped onto the second shell 20, and generates greater resistance to the movement of the first shell 10 in the axial direction away from the second shell 20, thereby preventing the first shell 10 from axially moving relative to the second shell 20.

[0051] The sealing body 41 of the second sealing ring 46 is also provided with sealing lips 42 at both radial ends. These lips 42 are bent in the same direction, i.e., they are inclined toward the upper right as viewed in FIG2 . Therefore, the sealing lips 42 of the second sealing ring 46 serve as axial sealing lips, preventing radial intrusion of moisture, dust, and the like into the strut bearing 30 and preventing axial leakage of grease within the strut bearing 30. The sealing lips 42 of the second sealing ring 46 also provide significant resistance to radial movement of the first and second housings 10, 20, thereby preventing radial movement of the first housing 10 relative to the second housing 20.

[0052] As can be seen from the above, the sealing lip 42 in the first sealing ring 45 and the sealing lip 42 of the second sealing ring 46 both extend radially and axially away from the pillar bearing 30. On the one hand, they block external moisture and impurities from entering the pillar bearing 30. On the other hand, the bending direction of the sealing lip 42 creates resistance to the direction in which the first housing 10 moves axially away from the second housing 20, preventing the first housing 10 from axially separating from the second housing 20. It also creates resistance to the direction in which the first housing 10 moves radially away from the second housing 20, preventing the first housing 10 from being displaced radially from the second housing 20.

[0053] Furthermore, the sealing ring 40 is integrally formed of a rubber material. The entire sealing ring 40 does not need to have an internal skeleton, thereby reducing the production cost and difficulty of the production process of the sealing ring 40.

[0054] It should be noted that the structure of the sealing body of the first sealing ring 45 and the bending direction of the sealing lip 42 shown in Figure 2 are only exemplary. Those skilled in the art can make changes based on the specific structure at the edges of the first shell 10 and the second shell 20 or the installation position of the sealing ring 40, and are not limited to the structure shown in the figure.

[0055] Based on the same inventive concept, the present disclosure provides a pillar bearing assembly 100 . The specific manner in which the functions of the pillar bearing assembly 100 are implemented has been described in detail in the embodiment of the sealing ring 40 and will not be elaborated on here.

[0056] In other embodiments, the first housing 10 of the pillar bearing assembly 100 may be integrally formed with the outer ring 31 of the pillar bearing 30, and the second housing 20 of the pillar bearing assembly 100 may be integrally formed with the inner ring 32 of the pillar bearing 30. Therefore, the sealing lip 42 of the sealing ring 40 may also be defined as being in dynamic sealing contact with the outer ring 31 of the pillar bearing 30. The inner ring 32 of the pillar bearing 30 is provided with an annular plug hole 21 for installing a sealing plug 43. The first sealing ring 45 and the second sealing ring 46 are respectively provided on radial sides of the roller 33.

[0057] It should be further understood that the terms "center", "axial", "radial", "up", "down", "left", "right", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0058] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0059] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A sealing ring (40), characterized in that: The invention comprises a ring-shaped sealing body (41), wherein the sealing body (41) comprises: a sealing lip (42); and The annular sealing plug (43) is located at one axial end of the sealing body (41). Wherein, along the circumference of the sealing plug (43), both the inner wall and the outer wall of the sealing plug (43) are provided with barbs (44).

2. The sealing ring (40) according to claim 1, characterized in that The barbs (44) include: a first barb surface (443), the first barb surface (443) being disposed close to the sealing lip (42), and the angle between the first barb surface (443) and the sealing plug (43) being a first angle (α); and A second barb surface (444), the second barb surface (444) is arranged away from the sealing lip (42), and the angle between the second barb surface (444) and the sealing plug (43) is a second angle (β), The first angle (α) and the second angle (β) are both obtuse angles, and the first angle (α) is smaller than the second angle (β).

3. The sealing ring (40) according to claim 1, characterized in that The deformation amount of the sealing plug (43) in the radial direction is 5% to 40%.

4. The sealing ring (40) according to claim 1, characterized in that The outer wall of the sealing plug (43) is provided with multiple circles of axially spaced external barbs (442); The inner wall of the sealing plug (43) is provided with a plurality of axially spaced inner barbs (441); The outer barb (442) and the inner barb (441) correspond to each other in the axial direction.

5. The sealing ring (40) according to claim 1, characterized in that The sealing lips (42) are respectively provided at both radial ends of the sealing body (41), and the bending directions of the sealing lips (42) are the same.

6. The sealing ring (40) according to claim 1, characterized in that The sealing ring (40) is integrally formed from a rubber material.

7. A pillar bearing assembly (100), characterized in that: include: a first housing (10); A second housing (20), wherein the second housing (20) is provided with an annular plug hole (21) on an end surface close to the first housing (10); a support bearing (30) supported between the first housing (10) and the second housing (20) in an axial direction (A) and configured to enable relative rotation between the first housing (10) and the second housing (20); as well as The sealing ring (40) according to any one of claims 1 to 6, wherein the sealing plug (43) of the sealing ring (40) is inserted into the annular plug hole (21) of the second shell (20), and the sealing lip (42) of the sealing ring (40) is in dynamic sealing contact with the first shell (10).

8. The strut bearing assembly (100) according to claim 7, characterized in that The ratio of the radial dimension of the annular plug hole (21) to the radial dimension of the sealing plug (43) ranges from 60% to 95%.

9. The strut bearing assembly (100) according to claim 7, characterized in that The sealing ring (40) comprises: a first sealing ring (45), the first sealing ring (45) being located radially outside the strut bearing (30); and / or A second sealing ring (46) is located radially inward of the strut bearing (30).

10. The strut bearing assembly (100) according to claim 9, characterized in that The sealing lip of the first sealing ring (45) is a radial sealing lip, and the sealing lip of the second sealing ring (46) is an axial sealing lip.

11. An installation method, characterized in that: The method for installing a strut bearing assembly according to any one of claims 7 to 10 comprises the following steps: Step 1: Fix the inner ring (32) of the pillar bearing (30) to the second housing (20), and install the roller (33) and the outer ring (31) in sequence; Step 2: inserting the sealing plug (43) of the sealing ring (40) into the annular plug hole (21) of the second housing (20), with the sealing lip (42) of the sealing ring (40) located outside the annular plug hole (21); Step three, buckle the first housing (10) axially onto the outer ring (31) of the pillar bearing (30), and dynamically seal it against the sealing lip (42) of the sealing ring (40), wherein the execution order of step one and step two is not particular.

12. The installation method according to claim 11, characterized in that: The sealing ring (40) includes a first sealing ring (45) and / or a second sealing ring (46), and the second housing (20) includes two annular plug holes (21) respectively located on the radial inner side and the radial outer side of the strut bearing (30). In the second step, the sealing plug of the first sealing ring (45) is inserted into the annular plug hole (21) located on the radial outside; and / or the sealing plug of the second sealing ring (46) is inserted into the annular plug hole (21) located on the radial inside.

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