Sealing ring for damping bearing of automobile trunk

Abstract

The utility model discloses a sealing ring for a damping bearing of an automobile tail compartment. The sealing ring comprises a framework ring and a rubber ring, an outer thickened lip is arranged on the outer wall of the rubber ring; a stepped annular groove is formed in the inner wall of the bearing outer ring; an inner thickened lip is arranged on the inner wall of the rubber ring; a retracting bevel edge is arranged on one side, facing the roller, of the inner thickened lip; a release groove is formed in one side, far away from the roller, of the inner thickened lip; the outer wall of the bearing inner ring is flat, and the indented bevel edge abuts against the outer wall of the inner ring. By changing the inner ring and the outer ring of the bearing and increasing the contact area between the inner diameter and the outer diameter of the sealing ring and the inner ring and the outer ring of the bearing, the requirement of the automobile tail compartment damping bearing is met. The indented bevel edge is attached to the flat outer wall of the inner ring, and the outer thickened lip is clamped in the stepped groove, so that not only is the mounting strength of the sealing ring improved, but also the positive pressure between the indented bevel edge and the inner ring can be increased by the counter-acting force generated by compression deformation. Protrusions and recesses on the outer surface are reduced or eliminated, and the structure of the rubber ring is simplified.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, and in particular relates to a sealing ring for a damping bearing in an automobile trunk. Background Technology

[0002] Bearing seal torque refers to the additional torque generated in the bearing's sealing structure due to the presence of the sealing device. This torque is caused by friction or resistance resulting from the contact between the sealing device and the bearing, or from non-contact sealing structures. It affects the bearing's free rotation and overall performance. Different types of seals (such as contact seals and non-contact seals) have different effects on the bearing's seal torque. While non-contact seals have lower friction, their dustproof effect may be less effective than contact seals in certain environments. Contact seals, due to direct contact, may generate higher frictional torque. However, for damping bearings, such as automotive trunk damping bearings, higher frictional torque can effectively absorb and convert the vibration energy generated during bearing operation.

[0003] Chinese patent document CN208966880U discloses a damping bearing for an automobile tailgate strut, comprising an inner bearing ring, balls, a cage, and an outer bearing ring. The outer bearing ring is stationary during use. The inner bearing ring is fixedly connected to the strut screw and rotates around the common axis of symmetry of the inner and outer bearing rings under the drive of the strut screw during use. The outer wall of the inner bearing ring and the inner wall of the outer bearing ring are provided with corresponding grooves. The cage installs the balls in the grooves by rivets. A sealing element is provided between the outer wall of the inner bearing ring and the inner wall of the outer bearing ring, and the fit between the sealing element and the outer wall of the inner bearing ring is an interference fit.

[0004] The sealing torque requirement for automotive trunk damping bearings is generally between 300-400 MN·m, while the sealing torque of conventional contact bearings is often between 10-50 MN·m. Clearly, conventional contact sealing structures cannot meet these requirements. While the damping bearing in the aforementioned patented solution can increase the sealing torque to some extent, the increased frictional resistance of the seal, coupled with the increased structural complexity (fitting and connecting parts), also increases manufacturing difficulty and the product defect rate. Furthermore, the increased thickness and structural complexity of the seal also increase its weight and installation strength requirements. The damping bearing in the aforementioned patented solution still uses the conventional contact bearing installation method, which obviously cannot meet actual usage needs. Utility Model Content

[0005] To overcome the technical problem that conventional contact bearings in the prior art cannot meet the sealing torque requirements of automotive trunk damping bearings, and that while increasing the sealing torque, the sealing components also increase structural complexity and cause insufficient installation strength, one objective of this utility model is to provide a sealing ring for automotive trunk damping bearings. This is achieved by providing an inner thickened lip with a recessed bevel on the inner wall of the rubber ring, which adheres to the outer wall of the bearing inner ring, increasing friction by increasing the contact area. Simultaneously, an outer thickened lip is provided on the outer wall of the rubber ring, increasing the installation strength with the bearing outer ring, while the reaction force also increases the normal pressure between the recessed bevel and the bearing inner ring. This achieves the goals of increasing sealing torque, simplifying the sealing ring structure, and making it easier to manufacture and produce.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a sealing ring for a damping bearing in an automotive trunk, wherein the damping bearing includes an inner ring, a roller, and an outer ring arranged sequentially from the inside to the outside; the sealing ring includes a skeleton ring and a rubber ring disposed on the skeleton ring; the outer wall of the rubber ring is provided with an outer thickened lip on the outside of the skeleton ring; the inner wall of the outer ring is provided with stepped annular grooves at both ends that engage with the outer thickened lip; the inner wall of the rubber ring is provided with an inner thickened lip on the inside of the skeleton ring; the inner thickened lip is provided with a recessed oblique edge on the side facing the roller; the inner thickened lip is provided with a release groove on the side away from the roller; wherein the outer wall of the inner ring is flat, and the recessed oblique edge abuts against the outer wall of the inner ring.

[0007] The thickened lip is interference-fitted into the stepped annular groove. The increased thickness of the thickened lip increases the installation strength and also presses the inner ring inward, causing the recessed chamfer to adhere to the inner ring. The release groove provides deformation space for the deformation of the recessed chamfer. The recessed chamfer increases the friction between the rubber ring and the inner ring by increasing the contact area and positive pressure, thereby increasing the sealing torque.

[0008] Furthermore, the inner thickened lip is located on the side of the skeleton ring facing the roller; the inner wall of the skeleton ring is provided with an inner pressure bend, which is inclined towards the roller; the end of the inner pressure bend is located inside the inner thickened lip.

[0009] Specifically, the release groove is located on the side of the inner pressure bend facing the inner ring.

[0010] The skeleton ring provides sufficient support strength for the inner thickened lip and sufficient space for elastic deformation of the recessed bevel.

[0011] Furthermore, the outer wall of the skeleton ring is provided with an outer folded ring, which is formed by bending at a 90-degree angle; the outer folded ring abuts against the side of the outer thickened lip facing the inner ring.

[0012] Specifically, the inner diameter of the outer folded ring is smaller than the inner diameter of the outer ring; the outer diameter of the outer folded ring is larger than the inner diameter of the outer ring.

[0013] The outer folding ring supports the outer thickened lip, pressing it tightly within the annular stepped groove, increasing the installation strength of the sealing ring. At the same time, the reaction force also causes the recessed inclined edge to adhere tightly to the outer wall of the inner ring, increasing the sealing torque.

[0014] Furthermore, the rubber ring has an outer convex ring on the side away from the roller; the outer thickened lip and the inner thickened lip are located on the outer and inner sides of the outer convex ring, respectively.

[0015] Specifically, the outer surface of the thickened lip is flat, without depressions or protrusions; the outer end of the thickened lip facing the roller has a rounded corner.

[0016] The external thick lip cannot undergo elastic strain, but can only undergo elastic compression, further ensuring installation strength and the reaction force acting on the recessed inclined side.

[0017] Specifically, the thickness of the outer thickened lip is greater than the thickness of the inner thickened lip; the thickness of the inner thickened lip is greater than the thickness of the skeleton ring.

[0018] Specifically, the width of the outer thickened lip is smaller than the width of the inner thickened lip.

[0019] Specifically, the thickness of the inner ring is greater than the thickness of the outer ring.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1. The new contact seal structure increases torque by changing the design of the inner and outer rings of the bearing and increasing the contact area between the inner and outer diameters of the seal ring and the inner and outer rings of the bearing, so as to meet the sealing torque requirements of the automotive trunk damping bearing.

[0022] 2. The indented bevel undergoes elastic deformation and adheres to the flat outer wall of the inner ring, increasing friction by increasing the contact area. At the same time, the thickened lip is compressed and tightened into the annular stepped groove of the outer ring. This not only increases the installation strength of the seal ring, but the reaction force generated by the compression deformation also increases the normal pressure between the indented bevel and the inner ring, increasing the friction between the seal ring and the inner and outer rings of the bearing, thus increasing the sealing torque.

[0023] 3. By reasonably controlling the relative thickness / width of the rubber ring and the skeleton ring, the protrusions and depressions on the surface are reduced or eliminated, simplifying the structure of the rubber ring and making it easier to produce and manufacture. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a cross-sectional schematic diagram of a conventional contact bearing;

[0026] Figure 3 This is a schematic diagram of the installation structure of the sealing ring of this utility model;

[0027] Figure 4 This is a cross-sectional structural diagram of the sealing ring of this utility model.

[0028] In the diagram: 1. Inner ring; 2. Outer ring; 21. Annular stepped groove; 3. Skeleton ring; 31. Inner pressure bend; 32. Outer fold ring; 4. Rubber ring; 41. Outer thickened lip; 42. Inner thickened lip; 421. Shrinking bevel; 43. Release groove; 44. Outer convex ring; 45. Rounded corner; 5. Roller; 6. Roller cage. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, terms such as "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] See Figure 2 The contact bearing has a small contact area and a thin thickness, and the sealing torque is often between 10-50 MN·m, which does not meet the sealing torque requirements of automotive trunk damping bearings (generally between 300-400 MN·m).

[0034] Commonly seen Figure 1 , Figure 3 , Figure 4 A sealing ring for a damping bearing in an automobile trunk, the damping bearing comprising an inner ring 1 arranged sequentially from the inside to the outside, a plurality of rollers 5 evenly distributed along the circumferential direction, an outer ring 2, and roller carriers 6 disposed on each of the rollers 5; the sealing ring having two rings, respectively disposed between the inner ring 1 and the outer ring 2; the sealing ring comprising a skeleton ring 3 and a rubber ring 4 disposed on the skeleton ring 3.

[0035] The outer wall of the rubber ring 4 is provided with an outer thickened lip 41 located outside the skeleton ring 3; the inner walls of the outer ring 2 are respectively provided with stepped annular grooves 21 that engage with the outer thickened lip 41 at both ends; the inner wall of the rubber ring 4 is provided with an inner thickened lip 42 located inside the skeleton ring 3; the inner thickened lip 42 is provided with a recessed bevel 421 on the side facing the roller 5; the inner thickened lip 42 is provided with a release groove 43 on the side away from the roller 5; the outer wall of the inner ring 1 is flat, and the recessed bevel 421 is attached to the outer wall of the inner ring 1.

[0036] The outer surface of the thickened lip 42 is flat, without any depressions or protrusions; the outer end of the thickened lip 42 facing the roller 5 is provided with a rounded corner 45.

[0037] The inner thickened lip 42 is located on the side of the skeleton ring 3 facing the roller 5; the inner wall of the skeleton ring 3 is provided with an inner pressure bend 31, which is inclined at 30° towards the roller; the end of the inner pressure bend 31 is located inside the inner thickened lip 42; the release groove 43 is located on the side of the inner pressure bend 31 facing the inner ring 1.

[0038] The outer wall of the skeleton ring 3 is provided with an outer folded ring 32, which is formed by bending at a 90-degree angle; the outer folded ring 32 abuts against the side of the outer thickened lip 41 facing the inner ring 1; the inner diameter of the outer folded ring 32 is smaller than the inner diameter of the outer ring 2; the outer diameter of the outer folded ring 32 is larger than the inner diameter of the outer ring 2.

[0039] The rubber ring 4 is provided with an outer convex ring 44 on the side away from the roller 5; the outer thickened lip 41 and the inner thickened lip 42 are located on the outer side and the inner side of the outer convex ring 44, respectively.

[0040] The thickness of the outer thickened lip 41 is greater than the thickness of the inner thickened lip 42; the thickness of the inner thickened lip 42 is greater than the thickness of the skeleton ring 3; the thickness on the rubber ring 4 refers to the distance difference in the axial direction of the sealing ring.

[0041] The width of the outer thickened lip 41 is smaller than the width of the inner thickened lip 42; the width on the rubber ring 4 refers to the distance difference in the radial direction of the sealing ring.

[0042] The thickness of the inner ring 1 is greater than the thickness of the outer ring 2; the thickness of the inner ring 1 and the outer ring 2 refers to the difference in radial distance between the damping bearing.

[0043] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A damping bearing seal ring for a trunk of an automobile, characterized by: The damping bearing comprises an inner ring, a roller and an outer ring arranged from inside to outside; the sealing ring comprises a skeleton ring and a rubber ring arranged on the skeleton ring; an outer thickened lip is arranged on the outer side of the outer wall of the rubber ring; a stepped annular groove is arranged at the both ends of the inner wall of the outer ring and is connected with the outer thickened lip; an inner thickened lip is arranged on the inner side of the inner wall of the rubber ring; a recessed bevel is arranged on the side of the inner thickened lip facing the roller; a release groove is arranged on the side of the inner thickened lip away from the roller; wherein the outer wall of the inner ring is flat, and the recessed bevel is tightly connected with the outer wall of the inner ring.

2. The seal ring of claim 1, wherein: The inner thickened lip is arranged on the side of the skeleton ring facing the roller; an inner pressure bend is arranged on the inner wall of the skeleton ring, and the inner pressure bend is inclined to the side of the roller; the end of the inner pressure bend is located in the inner thickened lip.

3. The seal ring of claim 2, wherein: The release groove is located on the side of the inner pressure bend facing the inner ring.

4. The seal ring of any one of claims 1-3, wherein: An outer bent ring is arranged on the outer wall of the skeleton ring, and the outer bent ring is formed by bending by 90 degrees; the outer bent ring is tightly connected with the side of the outer thickened lip facing the inner ring.

5. The seal ring of claim 4, wherein: The inner diameter of the outer bent ring is smaller than the inner diameter of the outer ring; the outer diameter of the outer bent ring is larger than the inner diameter of the outer ring.

6. The seal ring of any one of claims 1-3, wherein: An outer convex ring is arranged on the side of the rubber ring away from the roller; the outer thickened lip and the inner thickened lip are respectively arranged on the outer side and the inner side of the outer convex ring.

7. The seal ring of any one of claims 1-3, wherein: The outer surface of the outer thickened lip is flat without recess and protrusion; a rounded corner is arranged on the end of the outer thickened lip on the side facing the roller.

8. The seal ring of any one of claims 1-3, wherein: The thickness of the outer thickened lip is larger than the thickness of the inner thickened lip; the thickness of the inner thickened lip is larger than the thickness of the skeleton ring.

9. The seal ring of any one of claims 1-3, wherein: The width of the outer thickened lip is smaller than the width of the inner thickened lip.

10. The seal ring of any one of claims 1-3, wherein: The thickness of the inner ring is larger than the thickness of the outer ring.

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