Sealing shock absorber bearing

Abstract

A sealing shock absorber bearing comprises a bearing upper cover and a bearing lower cover, a rolling body is arranged between the bearing upper cover and the bearing lower cover, and a first rolling surface and a second rolling surface are arranged on the bearing upper cover and the bearing lower cover corresponding to the rolling body respectively. The first rolling face and the second rolling face are symmetrically arranged on the two sides of the rolling body in the circumferential direction, and the center line of the first rolling face and the center line of the second rolling face do not coincide with the axial direction and the radial direction of the rolling body. The bearing has the beneficial effects that the functions of the inner ring and the outer ring of the bearing are integrated to the upper cover and the lower cover of the bearing, so that the structural design is simplified, the number of parts is reduced, and the manufacturing cost is reduced. The first rolling face and the second rolling face are symmetrically arranged on the two sides of the rolling body in the circumferential direction and do not coincide with the axial direction and the radial direction of the rolling body, the axial deviation and the radial deviation of the rolling body are effectively limited through the design, and the rotating precision and the stability of the bearing are improved.

Description

Technical Field

[0001] The utility model relates to a shock absorber bearing, in particular to a sealed shock absorber bearing. Background Art

[0002] A shock absorber bearing is a special bearing designed for shock absorbers. It can withstand axial and radial loads, and at the same time allows the shock absorber to move smoothly during its stroke. Usually, upper and lower covers are also installed on it for reinforcement. And this kind of bearing usually adopts a sealed design to prevent pollutants from entering and keep lubricating grease. The key features of shock absorber bearings include high load-carrying capacity, low friction, long life and high reliability, making them very suitable for working in harsh environments.

[0003] Chinese Patent Document CN112797082A discloses a spring shock absorber bearing, which includes a cover, a guide ring, a thrust bearing and a seal cover. The guide ring includes a splash guard and at least one seal tooth. Axially, the seal tooth is located above the splash guard; the seal cover is fixed to the cover and includes: a pleat portion extending on the outer peripheral side of the seal tooth, the contour shape of the pleat portion is the same as or similar to the contour shape of the seal tooth, and the pleat portion can be stretched or compressed axially on the spring shock absorber bearing; and an outer hook portion, which is connected to the pleat portion and at least partially surrounds the axially lower end face of the splash guard.

[0004] In the prior art, a cover (which can be called the upper bearing cover in terms of its position) and a guide ring (which can be called the lower bearing cover in terms of its position) are respectively arranged on the circumferential side of the thrust bearing to position the bearing. Its main function is to further stabilize the radial or axial offset of the bearing rolling elements. However, the above scheme has the following deficiencies: the above scheme requires an upper bearing cover and a lower bearing cover outside the bearing to further position it, resulting in an overly bulky structure of this shock absorber bearing and unable to be further streamlined. Summary of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model provides a sealed shock absorber bearing with a simpler structure.

[0006] To achieve the above object, the technical solution of the utility model is as follows: A sealed shock absorber bearing includes an upper bearing cover and a lower bearing cover. A rolling element is arranged between the upper bearing cover and the lower bearing cover. First rolling surfaces and second rolling surfaces are respectively arranged on the upper bearing cover and the lower bearing cover corresponding to the position of the rolling element. The first rolling surface and the second rolling surface are symmetrically arranged on both sides of the circumferential direction of the rolling element, and the center lines of the first rolling surface and the second rolling surface do not coincide with the axial direction and the radial direction of the rolling element.

[0007] The beneficial effects of the present utility model are as follows: By integrating the functions of the inner and outer rings of the bearing into the upper and lower covers of the bearing, the above solution simplifies the structural design, reduces the number of parts, and lowers the manufacturing cost. The first rolling surface and the second rolling surface are symmetrically arranged on both sides of the circumferential direction of the rolling elements and do not coincide with the axial and radial directions of the rolling elements. This design effectively restricts the axial and radial displacements of the rolling elements, improves the rotational accuracy and stability of the bearing. At the same time, the circumferentially symmetric rolling surfaces help to disperse the load, reduce vibration, and optimize the shock absorption performance of the bearing. In addition, the streamlined structural design also makes the maintenance and repair of the bearing more convenient, helps to reduce the maintenance cost and improve the maintenance efficiency, thereby significantly enhancing the overall performance and service life of the bearing.

[0008] Further, both the first rolling surface and the second rolling surface are arranged in an arc shape, and a first reinforcing surface and a second reinforcing surface that are respectively connected to the first rolling surface and the second rolling surface and are both in an arc shape are respectively arranged on the bearing upper cover and the bearing lower cover. The first reinforcing surface and the second reinforcing surface are correspondingly arranged on both sides of the rolling element, and the arc directions of the first reinforcing surface and the second reinforcing surface are opposite to those of the first rolling surface and the second rolling surface respectively.

[0009] Both the first rolling surface and the second rolling surface are arranged in an arc shape, and a first reinforcing surface and a second reinforcing surface that are respectively connected to the first rolling surface and the second rolling surface and are both in an arc shape are respectively arranged on the bearing upper cover and the bearing lower cover. This design enhances the positioning effect of the rolling elements, provides stable support, ensures the precise centering of the rolling elements during the operation of the bearing, and reduces wear and friction. At the same time, the arc directions of the first reinforcing surface and the second reinforcing surface are opposite to those of the first rolling surface and the second rolling surface, which can allow the rolling elements to make minor adjustments while maintaining stable positioning, helps to absorb shocks and vibrations, and improves the shock absorption performance of the bearing. This structure also helps to disperse the load during the operation of the bearing, reduce local stress concentration, extend the service life of the bearing, and improve the rigidity and rotational accuracy of the bearing, ensuring reliability under high-speed or heavy-load conditions.

[0010] Further, a first anti-disengagement surface and a second anti-disengagement surface that are arranged in a flat shape are respectively arranged on the other sides of the bearing upper cover and the bearing lower cover corresponding to the first reinforcing surface and the second reinforcing surface, and the parts of the first rolling surface and the second rolling surface close to the connection of the first anti-disengagement surface and the second anti-disengagement surface are located below the horizontal positions of the first anti-disengagement surface and the second anti-disengagement surface.

[0011] The first anti - detachment surface and the second anti - detachment surface provided on the upper bearing cover and the lower bearing cover offer additional safeguards, effectively preventing the rolling elements from slipping out, enhancing the safety and reliability of the bearing. These anti - detachment surfaces are located below the first rolling surface and the second rolling surface near their respective other sides, forming a horizontal barrier to ensure that the rolling elements do not deviate from the predetermined track even under extreme loads or impacts. In addition, the planar settings of the first anti - detachment surface and the second anti - detachment surface help maintain the correct position of the rolling elements, further reducing the risk of failures caused by the offset of the rolling elements. This design also helps to maintain the stability and rotational accuracy of the bearing when it is subjected to large axial or radial loads, thereby extending the service life of the bearing and improving its performance under various working conditions.

[0012] Furthermore, a seal is integrally provided on the upper bearing cover. The seal covers the outside of the upper bearing cover and forms a sealing contact with the lower bearing cover on both sides of the upper bearing cover.

[0013] The design of the seal integrally provided on the upper bearing cover provides a compact and efficient sealing solution. This design enables the seal to completely cover the outside of the upper bearing cover and form a sealing contact with the lower bearing cover on both sides of the upper bearing cover, thus effectively preventing the intrusion of dust, moisture, and other external impurities. The one - piece seal structure not only simplifies the bearing assembly process, reduces the assembly cost, but also enhances the sealing effect and improves the protection level of the bearing. In addition, since the seal is integral with the upper bearing cover, its structural stability and durability are guaranteed, enabling the bearing to maintain stable performance in harsh working environments, extending the service life of the bearing, and reducing maintenance requirements.

[0014] Furthermore, a sealing boss is provided on one side of the lower bearing cover near its center. The seal is provided with double sealing lips corresponding to the sealing boss for mating with it.

[0015] The sealing boss includes a boss part and a lower arc part closer to the center of the lower bearing cover. The double sealing lips are V - shaped and have a short sealing edge that makes a sealing contact with the boss part and a long sealing edge that makes a sealing contact with the lower arc part. The provision of a sealing boss on one side of the lower bearing cover near its center, in cooperation with the double sealing lips on the seal, significantly reduces the length of the sealing lips, thereby reducing the deformation and wear of the sealing lips under high pressure or high - speed operation. The V - shaped structure of the double sealing lips, the sealing contact of the short sealing edge with the boss part, and the sealing contact with the lower arc part together constitute an efficient sealing system, effectively preventing the intrusion of pollutants and avoiding the problem of sealing failure that may occur with the long sealing edge. Description of the Drawings

[0016] Figure 1 Schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 is a cross-sectional view of an embodiment of the present utility model;

[0018] Figure 3 is a partially enlarged view at the rolling element of an embodiment of the present utility model;

[0019] Figure 4 is a cross-sectional view of the upper bearing cover of an embodiment of the present utility model;

[0020] Figure 5 is a cross-sectional view of the lower bearing cover of an embodiment of the present utility model. Detailed implementation manners

[0021] An embodiment of a sealed shock absorber bearing of the present utility model is as Figures 1-5 shown: It includes an upper bearing cover 1, a lower bearing cover 2 and rolling elements 3 disposed between the above two, and a seal 4 is also integrated on the upper bearing cover 1.

[0022] The upper bearing cover 1 and the lower bearing cover 2 are respectively provided with a first rolling surface 11 and a second rolling surface 21 corresponding to the position of the rolling element 3. The first rolling surface 11 and the second rolling surface 21 are symmetrically disposed on both sides of the circumferential direction of the rolling element 3. In this embodiment, the rolling element 3 is circular, and the center lines of the first rolling surface 11 and the second rolling surface 21 do not coincide with the axial direction and the radial direction of the rolling element 3. On one side of the first rolling surface 11 and the second rolling surface 21 which are both arc-shaped, an arc-shaped first strengthening surface 12 and a second strengthening surface 22 are respectively connected; on the other side of the first rolling surface 11 and the second rolling surface 21, a first anti-disengagement surface 13 and a second anti-disengagement surface 23 which are both flat are respectively connected, and the parts of the first rolling surface 11 and the second rolling surface 21 close to the connection of the first anti-disengagement surface 13 and the second anti-disengagement surface 23 are located below the horizontal positions of the first anti-disengagement surface 13 and the second anti-disengagement surface 23, that is, part of the arc surfaces of the first rolling surface 11 and the second rolling surface 21 are located below the first anti-disengagement surface 13 and the second anti-disengagement surface 23.

[0023] On the other side of the lower bearing cover 2 and the second strengthening surface 22, a sealing boss 24 is connected. The sealing boss 24 includes a boss part 241 and a lower arc part 242 disposed near the center of the lower bearing cover 2. On one side of the seal 4 corresponding to the sealing boss 24, a V-shaped double sealing lip 41 is provided. The double sealing lip 41 includes a short sealing edge 411 that forms a sealing abutment with the boss part 241 and a long sealing edge 412 that forms a sealing abutment with the lower arc part 242. On the other side of the seal 4 corresponding to the lower bearing cover 2, a single sealing lip 42 that protrudes and forms a sealing abutment with the lower bearing cover 2 is provided. The thickness of the single sealing lip 42 gradually decreases in the direction towards the lower bearing cover 2. In contrast, the part of the lower bearing cover 2 that forms a sealing abutment with the single sealing lip 42 is arc-shaped, so as to improve the sealing effect while saving the material of the sealing lip.

[0024] The above embodiments are only one of the preferred specific embodiments of the present utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are included in the protection scope of the present utility model.

Claims

1. A sealed shock absorber bearing, comprising an upper bearing cover and a lower bearing cover, wherein a rolling element is arranged between the upper bearing cover and the lower bearing cover, and characterized in that: The first rolling surface and the second rolling surface are respectively arranged at the corresponding rolling body positions on the bearing upper cover and the bearing lower cover. The first rolling surface and the second rolling surface are symmetrically arranged on both sides of the circumference of the rolling body, and the center lines of the first rolling surface and the second rolling surface do not coincide with the axial direction and radial direction of the rolling body.

2. The sealed shock absorber bearing according to claim 1, characterized in that: The first rolling surface and the second rolling surface are both arranged in the form of arc surfaces, and the first reinforcement surface and the second reinforcement surface which are respectively connected to the first rolling surface and the second rolling surface and are both in the form of arc surfaces are respectively arranged on the upper cover and the lower cover of the bearing, and the first reinforcement surface and the second reinforcement surface are respectively arranged on both sides of the rolling body and the arc surface directions of the first reinforcement surface and the second reinforcement surface are respectively opposite to those of the first rolling surface and the second rolling surface.

3. The sealed shock absorber bearing according to claim 2, characterized in that: The bearing upper cover and the bearing lower cover are respectively provided with a first anti-slip surface and a second anti-slip surface in a plane on the other side corresponding to the first reinforcement surface and the second reinforcement surface, and the first rolling surface and the second rolling surface are close to the parts connected with the first anti-slip surface and the second anti-slip surface and are located below the horizontal position of the first anti-slip surface and the second anti-slip surface.

4. The sealed shock absorber bearing according to claim 1, characterized in that: The bearing upper cover is integrally provided with a sealing member, which is arranged on the outer side of the bearing upper cover and forms sealing contact with the bearing lower cover at both sides of the bearing upper cover.

5. The sealed shock absorber bearing according to claim 4, characterized in that: A sealing boss is arranged on one side of the bearing lower cover close to the center thereof, and a double sealing lip matching with the sealing boss is arranged on the sealing member.

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