A self-lubricating thrust ball bearing

Abstract

This utility model relates to the field of bearing technology and discloses a self-lubricating thrust ball bearing, including a bracket and a bearing assembly installed inside the bracket. A positioning groove is provided on the inner wall of the bracket, and the outer ring of the bearing assembly is engaged and fixed in the groove. A threaded hole is provided on the top of the bracket. A threaded knob drives a positioning plate and a middle pressing plate to move downwards, so that the bottom surface of the pressing plate tightly abuts against the top of the outer ring, achieving physical locking. Rolling steel balls are arranged between the outer and inner rings inside the bearing, and the two are connected to form a cage, separating adjacent steel balls. This utility model solves the problem of unstable bearing installation and easy shaking through the external spiral clamping structure, and eliminates rigid collisions between steel balls through the internal self-lubricating isolation structure, reducing the coefficient of friction and noise, and extending service life.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to a self-lubricating thrust ball bearing. Background Technology

[0002] Ball bearings, as crucial basic components in mechanical equipment, are widely used in various rotating machinery. They primarily support rotating parts, reduce the coefficient of friction during movement, and ensure rotational accuracy. Thrust ball bearings, in particular, are mainly used to withstand axial loads. In actual industrial production and applications, the stability of bearing installation and the smoothness of its operation directly affect the performance of the entire mechanical system.

[0003] However, existing ball bearings often have certain structural defects in actual assembly and use. Typically, the outer ring of the bearing is fixed to the mounting hole using an interference fit or screws and clamps. This traditional installation method requires extremely high machining precision. If the fit tolerances deviate, or if the equipment experiences high-frequency vibrations during prolonged high-speed operation, the outer ring of the bearing is prone to slight loosening or axial movement within the mounting hole, leading to increased noise and decreased accuracy due to unstable installation. Furthermore, traditional bearing cages are mostly metal stampings, serving only to separate the steel balls and lacking self-lubrication. Significant frictional resistance still exists between the steel balls and the cage, as well as among the steel balls themselves, during high-speed operation. Regular external lubrication is essential; otherwise, poor lubrication can easily lead to severe overheating or even seizure, increasing equipment maintenance costs.

[0004] Therefore, this utility model proposes a self-lubricating thrust ball bearing to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the prior art, ball bearings often rely on a single interference fit during installation and fixation, which makes the outer ring prone to loosening or displacement in the bracket under long-term vibration conditions. In addition, traditional bearing cages are mostly rigid metal structures that lack self-lubricating function, resulting in high frictional resistance between steel balls, high operating noise and frequent maintenance. This utility model aims to provide a self-lubricating thrust ball bearing with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a self-lubricating thrust ball bearing, including: a bracket, a bearing assembly installed inside the bracket, a press-locking assembly located at the top of the bracket, and an isolation retaining assembly located inside the bearing assembly.

[0007] The bracket has positioning grooves at both ends of its inner sidewall, and the outer ring of the bearing assembly is engaged and fixed inside the positioning grooves. The top of the bracket has through threaded holes on both the left and right sides, with threaded knobs threaded inside each hole. The bottom of each threaded knob is rotatably connected to a positioning plate, and a pressing plate is fixedly connected between the two positioning plates, positioned above the outer ring.

[0008] Furthermore, the inner ring of the bearing assembly is coaxially positioned inside the outer ring, and multiple steel balls roll within sliding groove one on the inner wall of the outer ring and sliding groove two on the outer wall of the inner ring. Limiting strip one and limiting strip two are respectively attached to the front and rear walls of the steel balls. These two limiting strips are located in the gap between the outer and inner rings, and limiting strip one and limiting strip two are interconnected to form a retainer structure for isolating the steel balls.

[0009] Preferably, in order to ensure the connection stability of the isolation structure, the first limiting strip and the second limiting strip are fixedly connected by multiple bolts. The bolts pass through the first limiting strip and are threaded onto the second limiting strip. The installation position of the bolts is precisely set at the gap position between two adjacent steel balls to avoid interfering with the rolling of the steel balls.

[0010] Preferably, in order to better fit the curved surface of the steel ball and provide a good guiding effect, both limiting strip one and limiting strip two are arc-shaped strip structures, and spherical grooves adapted to the curvature of the steel ball surface are opened on the side surface of limiting strip one and limiting strip two facing the steel ball.

[0011] Preferably, in order to achieve a maintenance-free self-lubricating effect, both the first limiting strip and the second limiting strip are made of self-lubricating material, so that a low-friction sliding contact is formed between the surface of the steel ball and the limiting strip.

[0012] Preferably, the present invention also includes a reserved hole on the surface of the bracket, the reserved hole penetrating the side wall of the bracket, for installing fixing bolts to facilitate equipment integration, or as a heat dissipation vent to reduce operating temperature.

[0013] Preferably, in order to avoid the bearing being worn by the pressure plate due to the rotation of the knob, the bottom end of the threaded knob is provided with a rotating ball head, and the upper surface of the limiting plate is provided with a matching ball socket, so that the threaded knob and the limiting plate form a ball joint structure.

[0014] Preferably, in order to increase the cushioning protection and anti-slip performance during pressing, an elastic rubber pad is fixedly installed on the bottom surface of the pressing plate, the top outer wall of the outer ring is tightly fitted, and the two ends of the pressing plate are fixed to the side walls of the two limiting plates by welding.

[0015] Preferably, the outer wall shape of the outer ring is adapted to the inner wall shape of the limiting groove, and the front and rear of the outer ring abut against the front and rear inner walls of the limiting groove, thereby limiting the axial displacement of the outer ring within the bracket.

[0016] This utility model has the following beneficial effects: 1. This utility model solves the problems in the prior art where steel balls are prone to direct rigid collisions and friction, and where there is an over-reliance on external lubricating oil, resulting in high maintenance costs and wear due to lack of oil. By setting two limiting strips made of self-lubricating material on both sides of the steel ball and connecting them to form an isolation and retention structure, this invention achieves the goal of physically separating adjacent steel balls and continuously providing a self-lubricating film by using limiting strips, eliminating rigid collisions between steel balls, significantly reducing the coefficient of friction and operating noise, and extending the service life of the bearing.

[0017] 2. This utility model solves the problem that existing ball bearings are usually fixed by only interference fit or simple snap ring during installation, which leads to the outer ring easily loosening, displacement or even falling off under long-term vibration environment. It achieves the goal of firmly locking the bearing assembly in the bracket by using physical spiral pressure, effectively preventing the bearing from shaking and improving the stability of installation. Attached Figure Description

[0018] Figure 1 This is a front perspective view of a self-lubricating thrust ball bearing proposed in this utility model. Figure 2 This is a rear view of a self-lubricating thrust ball bearing proposed in this utility model. Figure 3 This is a partially exploded view of a self-lubricating thrust ball bearing proposed in this utility model. Figure 4 This is a partial structural diagram of a self-lubricating thrust ball bearing proposed in this utility model. Figure 5 This is a cross-sectional view of a self-lubricating thrust ball bearing proposed in this utility model. Figure 6 This is a partial structural diagram of a self-lubricating thrust ball bearing proposed in this utility model.

[0019] Legend: 1. Bracket; 2. Reserved hole; 3. Limiting plate; 4. Threaded knob; 5. Pressing plate; 6. Outer ring; 7. Inner ring; 8. Limiting groove; 9. Steel ball; 10. Sliding groove one; 11. Limiting strip one; 12. Limiting strip two; 13. Sliding groove two; 14. Threaded hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Example: Please refer to Figures 1 to 6 This utility model provides a self-lubricating thrust ball bearing, including a bracket 1 with a main support structure and a bearing assembly installed inside the bracket 1. The bracket 1 is used to install a base. The front and rear ends of the inner sidewall of the bracket 1 are respectively provided with positioning grooves 8. The front and rear ends of the outer ring 6 of the bearing assembly are respectively engaged and fixed inside the positioning grooves 8, and the shape of the outer wall of the outer ring 6 is adapted to the shape of the inner wall of the positioning groove 8. The front and rear ends of the outer ring 6 abut against the front and rear inner walls of the positioning groove 8, thereby restricting the axial displacement of the outer ring 6 in the bracket 1. The inner side of the outer ring 6 is provided with coaxially distributed inner rings 7. Multiple steel balls 9 are rolled between the outer ring 6 and the inner ring 7. The inner sidewall of the outer ring 6 is provided with a sliding groove 10. The middle of the outer sidewall of the inner ring 7 is provided with a sliding groove 2 13 opposite to the sliding groove 10. The steel balls 9 roll and cooperate in the annular raceway formed by the sliding groove 10 and the sliding groove 2 13.

[0022] Please refer to Figure 1 , Figure 3 and Figure 4 The top left and right sides of the bracket 1 are provided with through threaded holes 14. The threaded holes 14 are connected to threaded knobs 4. The top of the threaded knobs 4 is provided with anti-slip knurling. The bottom of the threaded knobs 4 is connected to a limit plate 3. A pressing plate 5 is fixedly connected between the two limit plates 3. When the threaded knobs 4 are rotated, the limit plates 3 can be driven to move the pressing plate 5 downward, so that the bottom surface of the pressing plate 5 can be tightly pressed against the top surface of the outer ring 6. Thus, by fixing it inside the bracket 1, vibration during operation is effectively prevented. Please refer to Figure 1 , Figure 2 and Figure 5 Limiting strip 11 and limiting strip 2 12 are respectively attached to the front and rear side walls of the steel ball 9. These two components are located in the gap between the outer ring 6 and the inner ring 7. Limiting strip 11 and limiting strip 2 12 are connected to the retainer structure that isolates the steel ball 9. Both limiting strip 11 and limiting strip 2 12 are arc-shaped strip structures, and the surface of limiting strip 11 and limiting strip 2 12 facing the steel ball 9 is provided with a surface that is adapted to the surface of the steel ball 9. Limiting strip 11 and limiting strip 2 12 separate adjacent steel balls 9 from each other, avoiding direct rigid contact between steel balls 9. As a preferred embodiment, in order to achieve maintenance-free and long-term lubrication of the bearing, both the first limiting strip 11 and the second limiting strip 12 are made of polytetrafluoroethylene. The surface of the steel ball 9 is in sliding contact with the first limiting strip 11 and the second limiting strip 12, and the limiting strips will continuously form a transfer lubricating film on the surface of the steel ball 9. As another preferred embodiment, in order to facilitate the assembly and disassembly of the cage, the first limiting strip 11 and the second limiting strip 12 are fixedly connected by multiple bolts. The bolts pass through the first limiting strip 11 and are threaded onto the second limiting strip 12. The bolts are located in the gap between two adjacent steel balls 9, which ensures the integrity of the cage structure. As a further preferred embodiment, the bottom surface of the pressing plate 5 has an elastic rubber pad, which is tightly fitted to the top outer wall of the outer ring 6. Both ends of the pressing plate 5 are fixed to the side walls of the two limiting plates 3 by welding. At the same time, the top of the threaded knob 4 is provided with anti-slip texture, and the bottom end of the threaded knob 4 is provided with a rotating ball head. The upper surface of the limiting plate 3 has a ball socket. The threaded knob 4 and the limiting plate 3 form a ball hinge structure, so that the limiting plate 3 rotates when the knob is rotated.

[0023] Working principle: The outer ring 6 is engaged with the inner side of the limiting groove 8 opened on the front and rear sides of the bracket 1, and the inner ring 7 is set in the middle of the inner side of the outer ring 6. Multiple steel balls 9 are slidably connected between the sliding groove 10 on the inner side of the outer ring 6 and the sliding groove 13 in the middle of the outer wall of the inner ring 7. At the same time, the front and rear sides of the outer wall of the steel balls 9 are respectively attached to the limiting strip 11 and the limiting strip 12, which are connected by bolts to form an isolation and retention structure. In addition, the top left and right sides of the bracket 1 are provided with threaded holes 14, the limiting plate 3 is attached to the top of the threaded hole 14, and the two limiting plates 3 are fixedly connected to the pressing plate 5. The threaded knob 4 is threadedly connected to the inner side of the threaded hole 14. The bracket 1 is also provided with a reserved hole 2. Therefore, during assembly, rotating the threaded knob 4 drives the limiting plate 3 and the middle pressing plate 5 to press down, firmly locking the bearing assembly in the bracket 1. During the operation of the bearing, the inner ring 7 rotates relative to the outer ring 6, and the steel ball 9 rolls in the track formed by the sliding groove 10 and the sliding groove 13, and is physically blocked and restricted by the limiting strip 11 and the limiting strip 12, maintaining a fixed distance as it moves. This achieves a stable installation of the ball bearing at the top. The limiting effect of the pressing plate 5 effectively prevents the bearing from shaking in the bracket 1. At the same time, the limiting strip 11 and the limiting strip 2 12 separate adjacent steel balls 9, eliminating direct collision and rigid friction between steel balls 9, which significantly improves the smoothness of the ball bearing's operation and its service life.

Claims

1. A self-lubricating thrust ball bearing, comprising: Bracket (1), limiting strip one (11), limiting strip two (12) and bearing assembly installed inside the bracket (1); The bracket (1) is characterized in that threaded holes (14) are respectively opened on the top left and right sides, and threaded knobs (4) are threadedly connected inside the threaded holes (14). The bottom end of the threaded knobs (4) is rotatably connected to a limiting plate (3). A pressing plate (5) is fixedly connected between the two limiting plates (3), and the bottom surface of the pressing plate (5) abuts against it. The bearing assembly includes an outer ring (6), an inner ring (7) coaxially disposed inside the outer ring (6), and a plurality of steel balls (9) rollingly connected between the outer ring (6) and the inner ring (7). The inner sidewall of the outer ring (6) is provided with a sliding groove 1 (10), and the middle part of the outer sidewall of the inner ring (7) is provided with a sliding groove 2 (13) opposite to the sliding groove 1 (10). The steel ball (9) rolls and cooperates in the raceway formed by the sliding groove 1 (10) and the sliding groove 2 (13).

2. A self-lubricating thrust ball bearing according to claim 1, wherein The inner sidewall of the bracket (1) has a limiting groove (8) at both the front and rear ends. The outer ring (6) is engaged with the inner side of the limiting groove (8) at both the front and rear ends. The outer wall of the outer ring (6) is connected to the inner wall of the bracket (1).

3. A self-lubricating thrust ball bearing according to claim 2, wherein The surface of the bracket (1) is also provided with a reserved hole (2), which penetrates the side wall of the bracket (1).

4. A self-lubricating thrust ball bearing according to claim 3, wherein Both the first limiting strip (11) and the second limiting strip (12) are arc-shaped structures, and the steel ball (9) is provided on the side of the first limiting strip (11) and the second limiting strip (12) facing the steel ball (9).

5. A self-lubricating thrust ball bearing according to claim 4, wherein The front and rear sidewalls of the steel ball (9) are respectively fitted with a limiting strip one (11) and a limiting strip two (12). The limiting strip one (11) and the limiting strip two (12) are fixedly connected to form an isolation and retention structure, which separates the adjacent steel balls (9) from each other.

6. A self-lubricating thrust ball bearing according to claim 5, wherein The first limiting strip (11) and the second limiting strip (12) are connected by bolts, and the bolts are located in the gap between two adjacent steel balls (9).

7. The self-lubricating thrust ball bearing of claim 1, wherein The top of the threaded knob (4) is provided with anti-slip knurling.

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