Gap-adjustable compensation knuckle bearing

Abstract

The invention discloses a gap-adjustable compensation knuckle bearing and relates to the technical field of bearings. In order to solve the problems that an existing knuckle bearing is lubricated by using a special material and selecting proper lubricating liquid, but a lubricating agent possibly overflows to adsorb dust and impurities due to excessive lubrication, so that abrasion is generated between an inner ring and an outer ring, and the service life of the bearing is relatively short. An outer ring of the knuckle bearing is divided into an outer ring upper ring and an outer ring lower ring which are vertically symmetrical, a gap is reserved between the opposite inner end faces of the outer ring upper ring and the outer ring lower ring, a cylindrical shell is installed outside the outer ring upper ring and the outer ring lower ring, and the outer ring upper ring and the outer ring lower ring are connected with the cylindrical shell through threads. The gap between the inner ring and the outer ring is enlarged due to long-time friction of the spherical surfaces between the inner ring and the outer ring, so that the gap between the opposite inner end surfaces of the outer ring upper ring and the outer ring lower ring can be adjusted by properly tightening the outer ring upper ring and the outer ring lower ring, the gap between the inner and outer spherical ring surfaces is further reduced, and the service life of the knuckle bearing is greatly prolonged. The invention is applicable to the field of knuckle bearings.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more specifically to a compensated spherical bearing with adjustable clearance. Background Technology

[0002] With the global economic recovery and industrial expansion, spherical plain bearings, as important mechanical components, are increasingly widely used in various mechanical equipment. Spherical plain bearings play a crucial role in aerospace engine, hydraulic systems, and parachute systems, serving as vital components in aerospace manufacturing. They are essential for supporting connections, reducing friction, bearing loads, and ensuring maneuverability and stability. However, the high loads and impacts they withstand increase wear rates, widen bearing clearances, and shorten their lifespan. Current methods to increase bearing life primarily include using bearings made of special materials and selecting appropriate lubricants. Over-lubrication, however, can lead to lubricant overflow and the absorption of dust and impurities.

[0003] In summary, existing spherical plain bearings are lubricated by using special materials and selecting appropriate lubricants. However, over-lubrication may cause the lubricant to overflow and attract dust and impurities, leading to wear between the inner and outer rings and thus a shorter bearing life. Summary of the Invention

[0004] This invention addresses the problem that existing spherical plain bearings, which use special materials and select appropriate lubricants for lubrication, may experience excessive lubrication, leading to lubricant overflow, adsorption of dust and impurities, and wear between the inner and outer rings, resulting in a short bearing life. Therefore, this invention proposes an adjustable clearance compensating spherical plain bearing.

[0005] The present invention provides an adjustable clearance compensating spherical bearing, which comprises a cylindrical outer shell 1, an upper outer ring 2, a lower outer ring 3, and an inner ring 4.

[0006] The inner ring 4 has a circular arc cross-section, and the outer ring upper ring 2 and outer ring lower ring 3 are sequentially fitted on the outer surface of the inner ring 4 from top to bottom. The outer surfaces of the outer ring upper ring 2 and outer ring lower ring 3 are both machined with threaded sections, and the inner wall of the cylindrical shell 1 is machined with threaded sections. The upper part of the inner wall of the cylindrical shell 1 is threadedly connected to the outer surface of the outer ring upper ring 2, and the lower part of the inner wall of the cylindrical shell 1 is threadedly connected to the outer surface of the outer ring lower ring 3. There is a gap between the inner end faces of the outer ring upper ring 2 and outer ring lower ring 3.

[0007] Furthermore, the lower part of the inner wall of the outer ring 2 is machined with a semi-arc-shaped annular groove along the circumferential direction;

[0008] Furthermore, the upper part of the inner wall of the lower outer ring 3 is machined with a semi-arc-shaped annular groove along the circumferential direction;

[0009] Furthermore, the gap between the inner end faces of the outer upper ring 2 and the outer lower ring 3 is 0.5mm~1mm;

[0010] Furthermore, the semi-arc-shaped annular grooves on the inner walls of the outer upper ring 2 and the outer lower ring 3 are slidably connected to the arc-shaped outer surface of the inner ring 4.

[0011] Furthermore, n countersunk holes are uniformly machined along the circumferential direction on the two opposite outer end faces of the outer upper ring 2 and the outer lower ring 3, where n is a positive integer;

[0012] Furthermore, the number of countersunk holes n on the end faces of the outer upper ring 2 and the outer lower ring 3 is 2≤n≤5;

[0013] Furthermore, the cylindrical outer shell 1, the outer upper ring 2, the outer lower ring 3, and the inner ring 4 are coaxially arranged;

[0014] Furthermore, the sum of the heights of the outer upper ring 2 and the outer lower ring 3 is less than the height of the inner ring 4.

[0015] Furthermore, the wall thickness of the cylindrical outer shell 1 is less than the minimum thickness of the outer ring 2;

[0016] Furthermore, the outer ring of the spherical plain bearing is divided into two symmetrical parts: an upper outer ring 2 and a lower outer ring 3. A gap is left between the inner end faces of the upper outer ring 2 and the lower outer ring 3, and a cylindrical outer shell 1 is installed on the outside. The upper outer ring 2 and the lower outer ring 3 are connected to the cylindrical outer shell 1 by threads. Due to the long-term friction between the spherical surfaces of the inner and outer rings, the gap between them increases. By appropriately tightening the upper outer ring 2 and the lower outer ring 3, the upper outer ring 2 and the lower outer ring 3 are retracted in the radial direction, so that the inner and outer ball rings can fit together again, thereby reducing the gap between the inner and outer ball ring surfaces, greatly extending the service life of the spherical plain bearing, improving the wear resistance of the spherical plain bearing, and reducing the replacement cost of the spherical plain bearing.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention overcomes the shortcomings of existing technologies by dividing the outer ring of the spherical plain bearing into two symmetrical parts: an upper outer ring and a lower outer ring. A gap is left between the inner end faces of the upper and lower outer rings, and a cylindrical outer shell is installed on the outside. The upper and lower outer rings are connected to the cylindrical outer shell by threads. Due to long-term friction between the spherical surfaces of the inner and outer rings, the gap between them increases. By appropriately tightening the upper and lower outer rings, they are retracted radially, thereby adjusting the gap between their inner end faces. This allows the inner and outer spherical rings to re-fit, reducing the gap between the inner and outer spherical ring surfaces, greatly extending the service life of the spherical plain bearing, improving its wear resistance, and reducing the cost of replacing the bearing. Attached Figure Description

[0019] Figure 1 This is a front sectional view of an adjustable clearance compensating spherical bearing according to the present invention;

[0020] Figure 2 This is a top view of an adjustable clearance compensating spherical bearing according to the present invention. Detailed Implementation

[0021] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes an adjustable clearance compensating spherical bearing, which comprises a cylindrical outer shell 1, an upper outer ring 2, a lower outer ring 3, and an inner ring 4.

[0022] The inner ring 4 has a circular arc cross-section, and the outer ring upper ring 2 and outer ring lower ring 3 are sequentially fitted on the outer surface of the inner ring 4 from top to bottom. The outer surfaces of the outer ring upper ring 2 and outer ring lower ring 3 are both machined with threaded sections, and the inner wall of the cylindrical shell 1 is machined with threaded sections. The upper part of the inner wall of the cylindrical shell 1 is threadedly connected to the outer surface of the outer ring upper ring 2, and the lower part of the inner wall of the cylindrical shell 1 is threadedly connected to the outer surface of the outer ring lower ring 3. There is a gap between the inner end faces of the outer ring upper ring 2 and outer ring lower ring 3.

[0023] In this specific embodiment, the outer ring of the spherical plain bearing is divided into two symmetrical parts: an upper outer ring 2 and a lower outer ring 3. A gap is left between the inner end faces of the upper outer ring 2 and the lower outer ring 3, and a cylindrical outer shell 1 is installed on the outside. The upper outer ring 2 and the lower outer ring 3 are connected to the cylindrical outer shell 1 by threads. Due to long-term friction between the spherical surfaces of the inner and outer rings, the gap between them increases. By appropriately tightening the upper outer ring 2 and the lower outer ring 3, the upper outer ring 2 and the lower outer ring 3 are radially retracted, so that the inner and outer spherical rings can fit together again, thereby reducing the gap between the inner and outer spherical ring surfaces, greatly extending the service life of the spherical plain bearing, improving the wear resistance of the spherical plain bearing, and reducing the replacement cost of the spherical plain bearing.

[0024] Specific Implementation Method Two: Combining Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment 1. In this embodiment, an adjustable clearance compensating spherical bearing has a semi-arc-shaped annular groove machined along the circumferential direction on the lower part of the inner wall of the outer ring 2.

[0025] Specific implementation method three: Combining Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment Two. In this embodiment, an adjustable clearance compensating spherical bearing has a semi-arc-shaped annular groove machined along the circumferential direction on the upper part of the inner wall of the lower outer ring 3.

[0026] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment Three. In this embodiment, the adjustable clearance compensating spherical bearing has semi-arc grooves on the inner walls of the outer upper ring 2 and the outer lower ring 3 that are slidably connected to the arc-shaped outer surface of the inner ring 4.

[0027] Specific Implementation Method Five: Combining Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment 1. In this embodiment, the adjustable clearance compensating spherical bearing has a clearance of 0.5mm to 1mm between the inner end faces of the outer upper ring 2 and the outer lower ring 3.

[0028] In this specific embodiment, the gap between the upper outer ring 2 and the lower outer ring 3 relative to their inner end faces is 0.5mm to 1mm. Due to the long-term friction between the spherical surfaces of the inner and outer rings, the gap between them increases. By appropriately tightening the upper outer ring 2 and the lower outer ring 3, the upper outer ring 2 and the lower outer ring 3 are retracted in the radial direction, thereby realizing the gap between the upper outer ring 2 and the lower outer ring 3 relative to their inner end faces. The range of the adjustable gap is 0.5mm to 1mm.

[0029] Specific Implementation Method Six: Combination Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment 1. In this embodiment, an adjustable clearance compensating spherical bearing is provided, wherein n countersunk holes are uniformly machined along the circumferential direction on the two opposite outer end faces of the outer upper ring 2 and the outer lower ring 3, where n is a positive integer.

[0030] In this specific embodiment, a special wrench can be used to rotate the outer ring upper ring 2 or outer ring lower ring 3 by means of a countersunk hole on the outer end face, thereby facilitating the rotation of the outer ring upper ring 2 or outer ring lower ring 3, and thus facilitating the position of the outer ring upper ring 2 or outer ring lower ring 3 relative to the interior of the cylindrical outer shell 1.

[0031] Specific implementation method seven: Combining Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment Six. In this embodiment, the number n of countersunk holes on the end faces of the outer ring upper ring 2 and outer ring lower ring 3 is 2≤n≤5.

[0032] Specific implementation method eight: Combination Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment 1. In this embodiment, an adjustable clearance compensating spherical bearing is provided, wherein the cylindrical outer shell 1, the outer upper ring 2, the outer lower ring 3, and the inner ring 4 are coaxially arranged.

[0033] Specific Implementation Method Nine: Combining Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment Eight. In this embodiment, the height of the adjustable clearance compensating spherical bearing is less than the height of the inner ring 4, where the sum of the heights of the outer upper ring 2 and the outer lower ring 3 is less than the height of the inner ring 4.

[0034] Specific Implementation Method Ten: Combining Figure 1 and Figure 2 This embodiment further defines the spherical bearing described in Specific Embodiment Eight. In this embodiment, the wall thickness of the cylindrical outer shell 1 is less than the minimum thickness of the outer ring 2.

Claims

1. A compensated spherical plain bearing with adjustable clearance, characterized in that: It includes a cylindrical outer shell (1), an upper outer ring (2), a lower outer ring (3), and an inner ring (4); The inner ring (4) has a circular arc cross section, and the outer ring (2) and the outer ring (3) are fitted on the outer surface of the inner ring (4) from top to bottom. The outer surfaces of the outer ring (2) and the outer ring (3) are both machined with threaded sections, and the inner wall of the cylindrical shell (1) is machined with threaded sections. The upper part of the inner wall of the cylindrical shell (1) is threaded to the outer surface of the outer ring (2), and the lower part of the inner wall of the cylindrical shell (1) is threaded to the outer surface of the outer ring (3). There is a gap between the inner end faces of the outer ring (2) and the outer ring (3).

2. The adjustable clearance compensating spherical plain bearing according to claim 1, characterized in that: The lower part of the inner wall of the outer ring (2) is machined with a semi-arc-shaped ring groove along the circumferential direction.

3. The adjustable clearance compensating spherical plain bearing according to claim 2, characterized in that: The upper part of the inner wall of the lower outer ring (3) is machined with a semi-arc-shaped ring groove along the circumferential direction.

4. The adjustable clearance compensating spherical plain bearing according to claim 3, characterized in that: The semi-arc-shaped annular grooves on the inner walls of the outer upper ring (2) and the outer lower ring (3) are slidably connected to the arc-shaped outer surface of the inner ring (4).

5. The adjustable clearance compensating spherical plain bearing according to claim 1, characterized in that: The gap between the inner end faces of the outer upper ring (2) and the outer lower ring (3) is 0.5mm~1mm.

6. The adjustable clearance compensating spherical plain bearing according to claim 1, characterized in that: The outer upper ring (2) and the outer lower ring (3) are respectively machined with n countersunk holes along the circumferential direction on their two opposite outer end faces, where n is a positive integer.

7. The adjustable clearance compensating spherical plain bearing according to claim 6, characterized in that: The number of countersunk holes n on the end faces of the outer upper ring (2) and the outer lower ring (3) is 2≤n≤5.

8. The adjustable clearance compensating spherical plain bearing according to claim 1, characterized in that: The cylindrical outer shell (1), the upper outer ring (2), the lower outer ring (3), and the inner ring (4) are coaxially arranged.

9. The adjustable clearance compensating spherical plain bearing according to claim 8, characterized in that: The sum of the heights of the outer upper ring (2) and the outer lower ring (3) is less than the height of the inner ring (4).

10. The adjustable clearance compensating spherical plain bearing according to claim 8, characterized in that: The wall thickness of the cylindrical outer shell (1) is less than the minimum thickness of the outer ring (2).

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