Self-lubricating knuckle bearing

Abstract

The utility model discloses a self-lubricating knuckle bearing which comprises an inner ring and an outer ring, the inner ring and the outer ring rotate and swing at any angle by taking a spherical surface as a contact surface, sealing rings are connected to two sides, close to the edge, of the outer ring, one end of each sealing ring is embedded in the inner side wall of the outer ring, and the opposite end of each sealing ring is an oblique cutting end part; the beveled end part is gradually narrowed from top to bottom until a sharp end surface is formed, and the beveled end part is inclined outwards; the sealing ring is located between the inner ring and the outer ring, and the inclined cutting-shaped end part abuts against the outer side wall of the inner ring, so that the sealing ring with the design is more reasonable in structure, can have better sealing performance even in a severe environment, and effectively prevents foreign pollutants from entering the space between the inner ring and the outer ring of the knuckle bearing, thereby ensuring the lubricating performance.

Description

Technical Field

[0001] The utility model relates to a self-lubricating spherical bearing. Background Art

[0002] A spherical plain bearing is a kind of spherical sliding bearing. As described in the patent document of Chinese Patent Publication No. CN2546681Y, its sliding contact surface is an inner spherical surface and an outer spherical surface, which enables it to rotate and swing at any angle. However, the spherical plain bearings commonly used on the market currently use conventional sealing rings, and the sealing effect is poor in actual application. Utility Model Content

[0003] The utility model aims to provide a technical solution for a self-lubricating spherical bearing to solve the deficiencies in the prior art, which can have a better sealing effect.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A self-lubricating spherical bearing, comprising

[0006] An inner ring and an outer ring, wherein the inner ring is rotatably sleeved inside the outer ring;

[0007] Sealing rings are connected to both sides of the outer ring near the edge. One end of the sealing ring is embedded in the inner wall of the outer ring, and the opposite end is a beveled end portion, which gradually narrows from top to bottom until a sharp end face is formed, and the beveled end portion is inclined outward; the sealing ring is located between the inner ring and the outer ring, and the beveled end portion abuts against the outer wall of the inner ring.

[0008] By adopting the above technical solution, one end of the sealing ring is embedded in the inner wall of the outer ring, and the beveled end of the other end is inclined outward and abuts against the outer wall of the inner ring. The sealing ring designed in this way is more reasonable in structure and can have better sealing performance even in harsh environments, effectively preventing foreign contaminants from entering between the inner ring and the outer ring of the spherical bearing, thereby ensuring lubrication performance.

[0009] Furthermore, first clamping grooves are formed on the inner side walls of both sides of the outer ring near the edge position, and the first clamping grooves are used to cooperate with the end of the sealing ring.

[0010] Furthermore, the first groove and the sealing ring are interference fit.

[0011] Furthermore, a second slot is formed by extending transversely in the first slot, and a first flange adapted to the second slot is formed on one side of the sealing ring. The first flange is inserted into the second slot to increase the connection stability between the sealing ring and the outer ring.

[0012] Furthermore, a self-lubricating structure is provided between the inner ring and the outer ring, and the self-lubricating structure is used to reduce friction between the inner ring and the outer ring.

[0013] Furthermore, the self-lubricating structure is a PTFE braided liner.

[0014] Furthermore, an annular groove is circumferentially formed on the inner side wall of the outer ring, and an annular flange adapted to the annular groove is formed on the outer side of the self-lubricating structure.

[0015] Furthermore, a refueling hole is provided through the surface of the outer ring, and the refueling hole corresponds to the annular groove.

[0016] Furthermore, a chromium layer is formed on the outer side wall surface of the inner ring.

[0017] Furthermore, a phosphate layer is formed on the outer wall surface of the outer ring.

[0018] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0019] 1. The sealing ring used in the spherical bearing of the utility model has better sealing performance and can effectively prevent foreign pollutants from entering between the inner ring and the outer ring of the spherical bearing, thereby ensuring lubrication performance;

[0020] 2. In the utility model, a second slot is formed in the first slot, and the sealing ring forms a first flange. The connection stability between the sealing ring and the outer ring can be increased by the cooperation and clamping of the first flange and the second slot;

[0021] 3. The PTFE braided liner between the inner ring and the outer ring of the utility model reduces friction, thereby ensuring that the spherical bearing can rotate and swing at any angle;

[0022] 4. In the utility model, the outer ring and the self-lubricating structure are limited by the cooperation of the annular groove and the annular flange, thereby preventing the self-lubricating structure from moving during the rotation of the spherical bearing;

[0023] 5. The oil filling hole in the utility model can inject lubricating liquid into the annular groove, thereby adding an auxiliary lubrication means. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the spherical bearing of the utility model;

[0026] Figure 2 It is a schematic diagram of the side structure of the spherical bearing of the utility model;

[0027] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0028] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure without a sealing ring;

[0029] Figure 5 It is a schematic diagram of the structure of the outer ring of the utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the self-lubricating structure of the utility model;

[0031] Figure 7 It is a structural schematic diagram of the inner ring of the utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the sealing ring of the utility model;

[0033] Fig. 9 It is a side structural schematic diagram of the sealing ring of the utility model;

[0034] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure of the middle BB;

[0035] In the figure: 1-outer ring; 11-inner side wall of outer ring; 12-first slot; 13-second slot; 14-chamfer; 15-annular groove;

[0036] 2-inner ring; 21-outer wall of inner ring; 22-through hole; 23-slope structure;

[0037] 3-sealing ring; 31-beveled end; 32-first flange;

[0038] 4-Self-lubricating structure; 41-Annular flange. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0042] Example 1

[0043] A self-lubricating spherical bearing comprises an outer ring 1 and an inner ring 2;

[0044] The outer ring 1 comprises an outer ring inner side wall 11, and the outer ring inner side wall 11 is a concave spherical surface;

[0045] The inner ring 2 includes an inner ring outer side wall 21, and the inner ring outer side wall 21 is a spherical surface adapted to the outer ring inner side wall 11;

[0046] The inner ring 2 is rotatably mounted inside the outer ring 1. Figure 1 As shown, through spherical matching, the spherical bearing can achieve rotation and swing at any angle.

[0047] A self-lubricating structure 4 is provided between the inner ring 2 and the outer ring 1. Figure 3 , Figure 4 As shown; the self-lubricating structure 4 is used to reduce friction between the inner ring 2 and the outer ring 1;

[0048] In this embodiment, the self-lubricating structure 4 is a PTFE braided liner.

[0049] Furthermore, an annular groove 15 is formed on the inner side wall of the outer ring 1 in the circumferential direction. Figure 3 , Figure 5 As shown;

[0050] The outer side of the self-lubricating structure 4 is formed with an annular flange 41 adapted to the annular groove 15. Figure 3 , Figure 4 as well as Figure 6 As shown;

[0051] When the self-lubricating structure 4 is between the outer ring 1 and the inner ring 2, the annular flange 41 is movably embedded in the annular groove 15 to achieve relative positioning of the self-lubricating structure 4 and the outer ring 1, thereby preventing the self-lubricating structure 4 from moving during the rotation of the spherical bearing.

[0052] In this embodiment, a refueling hole is formed through the surface of the outer ring 1, and the refueling hole is communicated with the annular groove 15;

[0053] The oil filling hole is used to inject lubricant into the annular groove 15. Injecting lubricant into the spherical bearing can be used as a preferred lubrication method.

[0054] In this embodiment, a chromium layer is formed on the outer wall surface of the inner ring 2;

[0055] The chrome layer plated on the inner ring outer wall 21 can make the surface of the inner ring outer wall 21 smooth and clean, and has the effect of preventing rust and improving structural strength.

[0056] In this embodiment, a phosphating layer is formed on the outer wall surface of the outer ring 1;

[0057] Providing a phosphating layer on the outer wall surface of the outer ring 1 can increase its corrosion resistance.

[0058] Sealing rings 3 are connected to both sides of the outer ring 1 near the edge, and the sealing rings 3 are between the outer ring 1 and the inner ring 2. Figure 3 As shown;

[0059] In this embodiment, first slots 12 are formed on the inner side walls of both sides of the outer ring 1 near the edge. Figure 4 As shown;

[0060] One end of the sealing ring 3 is embedded in the first slot 12. Figure 3 As shown;

[0061] The end of the sealing ring 3 opposite to the first slot 12 is a beveled end 31. Figure 8 to Figure 10 As shown;

[0062] The beveled end portion 31 gradually narrows from top to bottom until a sharp end surface is formed. Fig.10 As shown;

[0063] The beveled end portion 31 is inclined outward, and when the sealing ring 3 is between the inner ring 2 and the outer ring 1, the beveled end portion 31 abuts against the outer wall of the inner ring 2. Figure 3 shown.

[0064] The sealing ring 3 designed in this way is more reasonable in structure and can have better sealing performance even in harsh environments, effectively preventing foreign pollutants from entering between the inner ring 2 and the outer ring 1 of the spherical bearing, thereby ensuring lubrication performance.

[0065] In this embodiment, one end of the sealing ring 3 is embedded in the first clamping groove 12, and the first clamping groove 12 and the sealing ring 3 are interference fit, so that good connection stability can be achieved;

[0066] In this embodiment, a second card slot 13 is formed in the first card slot 12 by extending transversely. Figure 4 As shown;

[0067] In this embodiment, the second card slot 13 is perpendicular to the first card slot 12;

[0068] A first flange 32 adapted to the second slot 13 is formed on one side of the sealing ring 3. Fig.10 As shown;

[0069] When the sealing ring 3 is embedded in the first slot 12, the first flange 32 can be inserted into the second slot 13. Figure 3 As shown;

[0070] The connection stability between the sealing ring 3 and the outer ring 1 can be increased by the mating and plugging of the second clamping groove 13 and the first flange 32 .

[0071] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A self-lubricating spherical bearing, comprising An inner ring (2) and an outer ring (1), wherein the inner ring (2) is rotatably sleeved inside the outer ring (1); Features: Sealing rings (3) are connected to both sides of the outer ring (1) near the edge. One end of the sealing ring (3) is embedded in the inner wall of the outer ring (1), and the opposite end is a beveled end (31). The beveled end (31) gradually narrows from top to bottom until a sharp end face is formed. The beveled end (31) is inclined outward. The sealing ring (3) is located between the inner ring (2) and the outer ring (1), and the beveled end (31) abuts against the outer wall of the inner ring (2).

2. A self-lubricating spherical plain bearing according to claim 1, characterized in that: First clamping grooves (12) are formed on the inner side walls of both sides of the outer ring (1) near the edge, and the first clamping grooves (12) are used to be engaged with the end of the sealing ring (3).

3. A self-lubricating spherical plain bearing according to claim 2, characterized in that: The first clamping groove (12) and the sealing ring (3) are interference fit.

4. The self-lubricating spherical plain bearing according to claim 2, characterized in that: A second slot (13) is formed by extending transversely in the first slot (12), and a first flange (32) adapted to the second slot (13) is formed on one side of the sealing ring (3), and the first flange (32) is inserted into the second slot (13) to increase the connection stability between the sealing ring (3) and the outer ring (1).

5. The self-lubricating spherical plain bearing according to claim 1, characterized in that: A self-lubricating structure (4) is provided between the inner ring (2) and the outer ring (1), and the self-lubricating structure (4) is used to reduce friction between the inner ring (2) and the outer ring (1).

6. The self-lubricating spherical plain bearing according to claim 5, characterized in that: The self-lubricating structure (4) is a PTFE braided liner.

7. The self-lubricating spherical plain bearing according to claim 5, characterized in that: An annular groove (15) is circumferentially formed on the inner side wall of the outer ring (1), and an annular flange (41) adapted to the annular groove (15) is formed on the outer side of the self-lubricating structure (4).

8. The self-lubricating spherical plain bearing according to claim 7, characterized in that: A refueling hole is formed through the surface of the outer ring (1), and the refueling hole corresponds to the annular groove (15).

9. The self-lubricating spherical plain bearing according to claim 1, characterized in that: A chromium layer is formed on the outer wall surface of the inner ring (2).

10. The self-lubricating spherical plain bearing according to claim 1, characterized in that: A phosphate layer is formed on the outer wall surface of the outer ring (1).

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