Self-lubricating knuckle bearing

Abstract

The utility model provides a self-lubricating knuckle bearing which comprises an inner ring and an outer ring combination, the outer surface of the inner ring is spherical, the inner surface of the inner ring is cylindrical, the inner surface of the inner ring is matched with a shaft lever for use, the outer surface of the outer ring combination is cylindrical, the inner surface of the outer ring combination is concave spherical, and the outer surface of the inner ring is matched with the inner surface of the outer ring combination; the outer ring combination comprises a first outer ring and a second outer ring, the first outer ring and the second outer ring are the same, buckling grooves are symmetrically formed in the outer surfaces of the two sides of the first outer ring and the second outer ring, the buckling rings are arranged on the buckling grooves in a sleeving mode and can lock the first outer ring and the second outer ring, inserting grooves are formed in the inner surfaces of the two sides of the first outer ring and the second outer ring, and the outer surface of the rubber ring is inserted into the inserting grooves. The rubber rings can reduce abrasion on the outer surfaces of the two sides of the inner ring. The mounting mode that the retaining ring is used for locking the outer ring combination is adopted, special equipment is not needed, the situation that the stability of the shaft rod is affected due to the fact that the matching face of the inner ring and the outer ring combination is damaged is avoided, the assembly difficulty is low, and practicability is high.

Description

Technical Field

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

[0002] Spherical plain bearings are a type of spherical sliding bearing. Their sliding contact surfaces consist of an inner spherical surface and an outer spherical surface, allowing them to rotate and oscillate at any angle during operation. They are manufactured using various special processes such as surface phosphating, burring, padding, and spraying. Spherical plain bearings are characterized by high load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning properties, and good lubrication.

[0003] Patent document CN208686808U discloses a self-lubricating spherical plain bearing, comprising an outer ring and an inner ring that are spherically fitted together. The inner ring is located inside the outer ring. An oil reservoir is provided on the outer spherical surface of the inner ring. An oil injection hole is provided on the outer ring, penetrating through the outer ring. An oil plug is fitted onto the oil injection hole. A plurality of blind holes are provided on the inner spherical surface of the outer ring, and solid lubricant is embedded in each blind hole. The purpose of this invention is to provide a self-lubricating spherical plain bearing that allows for the replenishment of lubricating oil during use.

[0004] In the above solution, the spherical plain bearing is consistent with other conventional spherical plain bearings. During the installation of the inner and outer rings, special equipment is required to press the inner ring into the outer ring. This will cause damage to the mating surface of the inner ring, increasing the friction coefficient of the bearing; secondly, it is easy to cause hidden damage to the inner and outer rings, affecting the reliability and stability of the bearing; and thirdly, it increases the assembly difficulty of the spherical plain bearing. At the same time, since the inner ring of the spherical plain bearing protrudes from the outer ring, the protruding part of the inner ring is prone to wear. Therefore, it is necessary to provide a self-lubricating spherical plain bearing to solve the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a self-lubricating spherical bearing.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A self-lubricating spherical plain bearing includes an inner ring and an outer ring assembly. The outer surface of the inner ring is spherical, and the inner surface of the inner ring is cylindrical. The inner surface of the inner ring is used in conjunction with a shaft. The outer surface of the outer ring assembly is cylindrical, and the inner surface of the outer ring assembly is concave spherical. The outer surface of the inner ring and the inner surface of the outer ring assembly are adapted to each other.

[0008] The outer ring assembly includes outer ring one and outer ring two. Outer ring one and outer ring two are identical. The outer surfaces of outer ring one and outer ring two are symmetrically provided with buckle grooves. Buckle rings are fitted onto the buckle grooves and can lock outer ring one and outer ring two together. The inner surfaces of outer ring one and outer ring two are provided with slots. The outer surface of the rubber ring is inserted into the slots and can reduce the wear on the outer surfaces of the inner ring.

[0009] The present invention is further configured such that a self-lubricating graphite column array is provided on the circumferential surface of the inner ring.

[0010] The present invention is further configured such that the inner ring is surrounded by the outer ring assembly, and the inner ring can rotate freely within the outer ring assembly.

[0011] The present invention is further configured such that the width of the inner ring is greater than the width of the outer ring.

[0012] The present invention is further configured such that the outer diameter of the buckle is the same as the outer diameter of the outer ring assembly, the inner surface of the buckle abuts against the outer surface of the buckle groove, and the width of the buckle is the same as the width of the buckle groove.

[0013] The present invention is further configured such that the outer surface of the buckle groove has a protrusion and the inner surface of the buckle ring has a groove, and the protrusion and the groove are engaged accordingly.

[0014] The present invention is further configured such that the inner surface of the rubber ring is inclined, the outer surface of the rubber ring is U-shaped, and the rubber ring is sandwiched between the inner ring and the outer ring combination.

[0015] The present invention is further provided that the inner surface of the inner ring has chamfers at both ends.

[0016] The present invention is further configured such that the inner ring is made of copper alloy and the outer ring is made of steel.

[0017] In summary, this utility model has the following beneficial effects:

[0018] 1. This utility model uses a locking method for the outer ring assembly via a buckle. It does not require special equipment and will not damage the mating surfaces of the inner and outer rings, thus affecting the stability of the shaft. It has low assembly difficulty and high practicality.

[0019] 2. The rubber ring of this utility model can reduce the wear on the outer surfaces of both sides of the inner ring and can block some dust and debris from entering, thereby reducing the impact on the operation of the spherical bearing.

[0020] 3. The modular design of this utility model allows for the unlocking of the outer ring assembly when the inner ring is damaged, especially on both sides of the inner ring. Only the inner ring needs to be replaced, eliminating the need to replace the entire joint bearing and saving costs. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is the front view of this utility model.

[0023] Figure 3 This is a cross-sectional view of the present invention.

[0024] Figure 4 This is a utility model Figure 3 A magnified view of A in the middle.

[0025] In the diagram, 1. Inner ring, 2. Outer ring combination, 21. Outer ring one, 22. Outer ring two, 3. Snap groove, 31. Protrusion, 4. Snap ring, 41. Groove, 5. Slot, 6. Rubber ring, 7. Graphite column, 8. Chamfer. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] Example 1:

[0028] In this embodiment, as Figure 1-2 As shown, the present invention proposes a self-lubricating spherical bearing, comprising an inner ring 1 and an outer ring assembly 2. The outer surface of the inner ring is spherical, and the inner surface of the inner ring is cylindrical. The inner surface of the inner ring is used in conjunction with the shaft. The outer surface of the outer ring assembly is cylindrical, and the inner surface of the outer ring assembly is concave spherical. The outer surface of the inner ring and the inner surface of the outer ring assembly are adapted to each other.

[0029] The outer ring assembly includes outer ring one 21 and outer ring two 22. Outer ring one and outer ring two are the same. The outer surfaces of outer ring one and outer ring two are symmetrically provided with fastening grooves 3. Fastening rings 4 are fitted on the fastening grooves and can lock outer ring one and outer ring two together. The inner surfaces of outer ring one and outer ring two are provided with slots 5. The outer surface of rubber ring 6 is inserted into the slots and can reduce the wear on the outer surfaces of the inner ring.

[0030] In this example, the installation method of locking the outer ring assembly with the retaining ring does not require special equipment and will not damage the mating surfaces of the inner and outer ring assemblies, thus affecting the stability of the shaft. The assembly difficulty is low and the practicality is high.

[0031] In this embodiment, the inner ring outer surface is further provided with a circumferential array of self-lubricating graphite pillars 7. For example, the axial spacing between adjacent graphite pillars is set at 30 degrees. This distribution method can ensure that the graphite and the inner surface of the outer ring combination provide a uniform lubrication effect during the sliding process, so that the graphite can more effectively cover the sliding surface and form a lubricating film, thereby reducing the coefficient of friction and wear rate, and improving operating efficiency and life.

[0032] In this embodiment, the inner ring is further configured such that it is surrounded by the outer ring assembly, and the inner ring can rotate freely within the outer ring assembly.

[0033] In this embodiment, the inner ring width is further configured to be greater than the width of the outer ring assembly, and the inner ring protrudes from the outer ring assembly on both sides. The rubber ring can reduce the wear on both sides of the inner ring and can block some dust and debris from entering, thereby reducing the impact on the operation of the spherical bearing.

[0034] In this embodiment, the outer diameter of the buckle is consistent with the outer diameter of the outer ring assembly, the inner surface of the buckle abuts against the outer surface of the buckle groove, and the width of the buckle is consistent with the width of the buckle groove. That is, the buckle does not protrude from the outer surface of the outer ring assembly, nor from the two side planes of the outer ring assembly, so as to avoid the buckle being hit and thus affecting the locking of the outer ring assembly.

[0035] In this embodiment, the outer surface of the buckle groove is provided with a protrusion 31 and the inner surface of the buckle ring is provided with a groove 41. The protrusion and the groove are engaged with each other. The height of the protrusion and the depth of the groove are small and the size needs to be appropriate. That is, it can strengthen the buckle ring to lock the outer ring while not affecting the buckle ring being pressed into the buckle groove. The protrusion can also be additionally installed as an elastic ring.

[0036] In this embodiment, the inner surface of the rubber ring is inclined, the outer surface of the rubber ring is U-shaped, and the rubber ring is sandwiched between the inner ring and the outer ring combination.

[0037] In this embodiment, the inner surface of the inner ring is further provided with chamfers 8 at both ends. The chamfering process can remove burrs and sharp edges in the original position and facilitate the installation of the shaft.

[0038] In this embodiment, the inner ring is further configured to be made of copper alloy, which can be ZCuSn10P1 copper-copper alloy, and the outer ring is made of steel, which can be GCr15 bearing steel. Copper alloy has corrosion resistance and good thermal conductivity, making it suitable for high-speed and high-temperature working environments. Steel has high hardness, high strength, and good wear resistance, which can meet the requirements for use under high-speed and high-load conditions.

[0039] The installation process of this self-lubricating spherical bearing is as follows: Place the outer ring with its opening facing upwards, then place the inner ring on top of the outer ring. Next, insert the outer surface of the rubber ring into the slot of the outer ring. Place the outer ring on top of the inner ring and align it. Then, fasten the retaining rings from both sides from the outside inwards into the retaining grooves. During the fastening process, the protrusions and grooves should engage accordingly. Adjust the rubber ring so that its outer surface engages with the slot of the outer ring. Move the inner ring. If the inner ring can move freely within the outer ring assembly, the installation is complete. The shaft can then be connected to the inner ring for use.

[0040] In the description of this utility model, it should be noted that when terms such as "upper," "lower," "inner," "outer," "left," and "right" appear to indicate orientation or positional relationships, they should be understood as being based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this utility model is in use, or the orientation or positional relationships commonly understood by those skilled in the art. These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, when terms such as "first" and "second" appear, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that unless otherwise explicitly specified and limited, terms such as "installation," "setting," and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

Claims

1. A self-lubricating plain bearing, characterized in that The inner ring is combined with the outer ring assembly, the outer surface of the inner ring is spherical, the inner surface of the inner ring is cylindrical, the inner surface of the inner ring is matched with the shaft, the outer surface of the outer ring assembly is cylindrical, the inner surface of the outer ring assembly is concave spherical, and the outer surface of the inner ring is matched with the inner surface of the outer ring assembly; The outer ring assembly comprises an outer ring one and an outer ring two, the outer ring one and the outer ring two are the same, the outer surfaces of the two sides of the outer ring one and the outer ring two are symmetrically provided with buckling grooves, a buckling ring is sleeved on the buckling grooves, the buckling ring can lock the outer ring one and the outer ring two, the inner surfaces of the two sides of the outer ring one and the outer ring two are provided with insertion grooves, and the outer surface of a rubber ring is inserted into the insertion grooves; the rubber ring can reduce the abrasion of the outer surfaces of the two sides of the inner ring.

2. A self-lubricating plain bearing according to claim 1, characterized in that The outer surface of the inner ring is circumferentially arrayed with self-lubricating graphite columns.

3. A self-lubricating plain bearing according to claim 1, characterized in that The inner ring is surrounded by the outer ring assembly, and the inner ring can freely rotate in the outer ring assembly.

4. A self-lubricating plain bearing according to claim 1, characterized in that The width of the inner ring is greater than the width of the outer ring.

5. A self-lubricating plain bearing according to claim 1, characterized in that The outer diameter of the buckling ring is consistent with the outer diameter of the outer ring assembly, the inner surface of the buckling ring is in abutment with the outer surface of the buckling groove, and the width of the buckling ring is consistent with the width of the buckling groove.

6. A self-lubricating plain bearing according to claim 1, characterized in that The outer surface of the buckling groove is provided with a protrusion, the inner surface of the buckling ring is provided with a groove, and the protrusion is correspondingly clamped with the groove.

7. A self-lubricating plain bearing according to claim 1, characterized in that The inner surface of the rubber ring is inclined, the outer surface of the rubber ring is U-shaped, and the rubber ring is clamped between the inner ring and the outer ring assembly.

8. A self-lubricating plain bearing according to claim 1, characterized in that The inner surface of the inner ring is provided with chamfers at both ends.

9. A self-lubricating plain bearing according to claim 1, characterized in that The material of the inner ring is copper alloy, and the material of the outer ring is steel.

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