Powder metallurgical oil-impregnated bearing

Abstract

The utility model discloses a kind of powder metallurgy oil-impregnated bearings, including outer ring, the inside of the outer ring is equipped with inner ring by ball, the surface of the inner end of the outer ring is symmetrically connected with oil injection pipe, the inside of the oil injection pipe is provided with oil injection hole.The utility model is sealed by double sealing combination of lip-shaped sealing ring and elastic sealing ring on the upper and lower sides of inner ring, can effectively block external dust, impurity enters, prevent internal lubricating oil leakage simultaneously, form reliable sealing defense line, and the overall height of support frame and adjusting block after plug-in is flush with the outer surface of outer ring, avoid external protrusion to occupy additional space, it is convenient to cooperate with other components and install, in addition, oil injection hole is directly connected with ball movable cavity, injected lubricating oil can be accurately delivered to friction part, further reduce abrasion, comprehensively improve the service performance and service life of bearing, applicable to motor, automobile, household appliance and other multi-field long-term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a powder metallurgy oil-impregnated bearing. Background Technology

[0002] Powder metallurgy oil-impregnated bearings are porous bearings manufactured using powder metallurgy technology. They contain numerous micropores that can store lubricating oil. During operation, the lubricating oil reduces friction and wear, making them widely used in motors, automobiles, and home appliances. However, the sealing performance of existing powder metallurgy oil-impregnated bearings needs improvement. During long-term use, external dust and impurities can easily enter the bearing, and internal lubricating oil may also leak. This can accelerate bearing wear and shorten the bearing's service life. Utility Model Content

[0003] The purpose of this invention is to provide a powder metallurgy oil-impregnated bearing with the advantage of good sealing performance.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a powder metallurgy oil-impregnated bearing, comprising an outer ring, an inner ring mounted inside the outer ring via ball bearings, oil injection pipes symmetrically connected to the upper and lower surfaces of the inner end of the outer ring, an oil injection hole opened inside the oil injection pipe, a sealing plug snapped into the inside of the oil injection pipe, a pressing plate mounted outside the sealing plug, an adjusting block mounted outside the pressing plate, a pull plate mounted on the upper end of the adjusting block, lip seals mounted on both the upper and lower sides of the inner ring surface, an elastic seal ring snapped into the inside of the lip seal ring, and the outer end of the elastic seal ring being integrally fitted to the surface of the inner end extension portion of the outer ring.

[0005] As a preferred embodiment, a support frame is installed on the inner end surface of the outer ring. The outer end of the support frame is bent and sleeved on the surface of the adjusting block. A limiting groove is vertically formed on one side of the inner side of the support frame. The inside of the limiting groove is connected to one end of the pressing plate through a limiting block.

[0006] As a preferred embodiment, a sealing gasket is fixedly installed at the outer end of the elastic sealing ring. The sealing gasket is vertically distributed and seals against the inner wall of the outer ring.

[0007] As a preferred embodiment, a limit spring is additionally fitted onto the surface of the adjusting block, and the two ends of the limit spring are respectively connected to the surfaces of the pressing plate and the support frame.

[0008] As a preferred embodiment, the sealing plug is cylindrical in shape, with the diameter of the insertion end being smaller than the diameter of the outer end. In addition, the insertion end of the sealing plug is in sealing contact with the inner wall of the oil injection hole.

[0009] As a preferred embodiment, the overall height of the support frame and the adjusting block after insertion is at the same level as the outer surface of the outer ring, and the inner end of the oil injection hole is connected to the ball moving cavity connected between the inner ring and the outer ring.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model effectively blocks external dust and impurities from entering by using a double sealing combination of lip seals and elastic seals on the upper and lower sides of the inner ring, while preventing internal lubricating oil leakage, forming a reliable sealing barrier. After the support frame and adjusting block are inserted, the overall height is flush with the outer surface of the outer ring, avoiding external protrusions occupying extra space and facilitating installation with other components. In addition, the oil injection hole is directly connected to the ball moving cavity, and the injected lubricating oil can be accurately delivered to the friction parts, further reducing wear. This comprehensively improves the performance and service life of the bearing, making it suitable for long-term stable operation in various fields such as motors, automobiles, and home appliances.

[0012] 2. This utility model provides stable support for the adjusting block through the support frame. When the pull plate is pulled to move the adjusting block up and down, the limiting block at one end of the pressing plate will move synchronously in the limiting groove, ensuring that the pressing plate always moves in a straight line, thereby ensuring that the sealing plug can be accurately inserted into or pulled out of the oil injection hole. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the oil injection pipe structure of this utility model;

[0015] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0016] Figure 4 This utility model Figure 3 A magnified view of a portion of point A in the middle.

[0017] In the diagram: 1. Outer ring; 2. Inner ring; 3. Oil injection pipe; 4. Oil injection hole; 5. Sealing plug; 6. Press plate; 7. Support frame; 8. Pull plate; 9. Adjusting block; 10. Limiting groove; 11. Lip seal; 12. Elastic seal; 13. Sealing gasket. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0020] Example 1:

[0021] Please see Figure 1 As shown, this utility model provides a powder metallurgy oil-impregnated bearing, including an outer ring 1. An inner ring 2 is installed inside the outer ring 1 via ball bearings. An oil injection pipe 3 is symmetrically connected to the upper and lower surfaces of the inner end of the outer ring 1. An oil injection hole 4 is opened inside the oil injection pipe 3. A sealing plug 5 is snapped into the inside of the oil injection pipe 3. A pressing plate 6 is installed outside the sealing plug 5. An adjusting block 9 is installed outside the pressing plate 6. A pull plate 8 is installed at the upper end of the adjusting block 9. Lip seals 11 are installed on both the upper and lower sides of the surface of the inner ring 2. An elastic sealing ring 12 is snapped into the inside of the lip seal 11. The outer end of the elastic sealing ring 12 is completely attached to the surface of the inner end extension of the outer ring 1.

[0022] This technical solution effectively blocks external dust and impurities from entering by using a double sealing combination of lip seals 11 and elastic seals 12 on the upper and lower sides of the inner ring 2, while preventing internal lubricating oil leakage, forming a reliable sealing barrier. After the support frame 7 and the adjusting block 9 are inserted, the overall height is flush with the outer surface of the outer ring 1, avoiding external protrusions occupying extra space and facilitating installation with other components. In addition, the oil injection hole 4 is directly connected to the ball moving cavity, and the injected lubricating oil can be accurately delivered to the friction parts, further reducing wear. This comprehensively improves the performance and service life of the bearing, making it suitable for long-term stable operation in various fields such as motors, automobiles, and home appliances.

[0023] Example 2:

[0024] Based on Embodiment 1, this utility model is as follows: Figure 4 As shown, a support frame 7 is installed on the inner end surface of the outer ring 1. The outer end of the support frame 7 is bent and is sleeved on the surface of the adjusting block 9. A limiting groove 10 is vertically opened on one side of the inner side of the support frame 7. The inside of the limiting groove 10 is connected to one end of the pressing plate 6 through a limiting block.

[0025] Adopting such Figure 1 The technical solution shown has a support frame 7 that provides stable support for the adjusting block 9. When the pull plate 8 is pulled to move the adjusting block 9 up and down, the limiting block at one end of the pressing plate 6 will move synchronously in the limiting groove 10, ensuring that the pressing plate 6 always moves in a straight line, thereby ensuring that the sealing plug 5 can be accurately inserted into or pulled out of the oil filling hole 4.

[0026] Secondly, in the technical solution, a sealing gasket 13 is fixedly installed on the outer end of the elastic sealing ring 12. The sealing gasket 13 is vertically distributed and seals against the inner wall of the outer ring 1. A limit spring is also sleeved on the surface of the adjusting block 9, and the two ends of the limit spring are connected to the surfaces of the pressing plate 6 and the support frame 7, respectively.

[0027] Its adoption is as follows Figure 1 The technical solution shown has a certain sealing effect in the lip seal ring 11. The cooperation between the elastic seal ring 12 and the lip seal ring 11 forms the first sealing line, while the tight fit between the sealing gasket 13 and the inner wall of the outer ring 1 forms the second sealing line. The double sealing structure can effectively prevent external impurities from entering the bearing and prevent internal lubricating oil from leaking out, which greatly improves the sealing performance of the bearing and extends the service life of the bearing. When it is necessary to inject oil into the bearing, pull the pull plate 8 upward. The pull plate 8 drives the adjusting block 9 and the pressing plate 6 to move upward. The pressing plate 6 will compress the limit spring. At this time, the sealing plug 5 is pulled out from the oil injection hole 4, and lubricating oil can be injected into the bearing through the oil injection hole 4.

[0028] Example 3:

[0029] This utility model is as follows Figures 1-4 As shown, the sealing plug 5 is designed in a cylindrical shape, and the diameter of the insertion end is smaller than the diameter of the outer end. In addition, the insertion end of the sealing plug 5 is in sealing contact with the inner wall of the oil injection hole 4. The overall height of the support frame 7 and the adjusting block 9 after insertion is at the same level as the outer surface of the outer ring 1. The inner end of the oil injection hole 4 is connected to the ball moving cavity connected between the inner ring 2 and the outer ring 1.

[0030] Using the above technical solution, the cylindrical design facilitates the movement of the sealing plug 5 within the oil injection pipe 3, while the sealing contact between the plug end and the inner wall of the oil injection hole 4 ensures the sealing effect of the oil injection hole 4, preventing lubricating oil leakage during bearing operation; the overall height design of the support frame 7 and the adjusting block 9 makes the external structure of the bearing flat, without any protruding parts, thus reducing space occupation when installing the bearing on the equipment, and facilitating the precise installation of the bearing with other components.

[0031] The working principle of this utility model is as follows: the cooperation between the elastic sealing ring 12 and the lip sealing ring 11 forms the first sealing line, while the tight fit between the sealing gasket 13 and the inner wall of the outer ring 1 forms the second sealing line. The double sealing structure can effectively prevent external impurities from entering the bearing and prevent internal lubricating oil from leaking out, which greatly improves the sealing performance of the bearing and extends the service life of the bearing. When it is necessary to inject oil into the bearing, pull the pull plate 8 upward. The pull plate 8 drives the adjusting block 9 and the pressing plate 6 to move upward. The pressing plate 6 will compress the limit spring. At this time, the sealing plug 5 is pulled out from the oil injection hole 4, and lubricating oil can be injected into the bearing through the oil injection hole 4.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A powder metallurgy oil-impregnated bearing, comprising an outer ring (1), characterized in that: The inner ring (2) is installed inside the outer ring (1) by ball bearings. The inner end of the outer ring (1) is symmetrically connected to the upper and lower surfaces by oil injection pipes (3). The oil injection pipes (3) have oil injection holes (4) inside. The oil injection pipes (3) are fitted with sealing plugs (5). The sealing plugs (5) are fitted with pressing plates (6) on the outside. The pressing plates (6) are fitted with adjusting blocks (9) on the outside. The upper end of the adjusting blocks (9) is fitted with pull plates (8). The inner ring (2) is fitted with lip seals (11) on both the upper and lower sides. The lip seals (11) are fitted with elastic seals (12) inside. The outer end of the elastic seals (12) is completely attached to the surface of the inner end extension of the outer ring (1).

2. The powder metallurgy oil-impregnated bearing according to claim 1, characterized in that: A support frame (7) is installed on the inner end of the outer ring (1). The outer end of the support frame (7) is bent and sleeved on the surface of the adjusting block (9). A limiting groove (10) is vertically opened on one side of the inner side of the support frame (7). The inside of the limiting groove (10) is connected to one end of the pressing plate (6) through a limiting block.

3. The powder metallurgy oil-impregnated bearing according to claim 1, characterized in that: A sealing gasket (13) is fixedly installed on the outer end of the elastic sealing ring (12). The sealing gasket (13) is vertically distributed and is sealed and fitted to the inner wall of the outer ring (1).

4. The powder metallurgy oil-impregnated bearing according to claim 1, characterized in that: The surface of the adjusting block (9) is further fitted with a limiting spring, and the two ends of the limiting spring are respectively connected to the surfaces of the pressing plate (6) and the support frame (7).

5. The powder metallurgy oil-impregnated bearing according to claim 1, characterized in that: The sealing plug (5) is cylindrical in shape, and the diameter of the plug end is smaller than the diameter of the outer end. In addition, the plug end of the sealing plug (5) is in sealing contact with the inner wall of the oil injection hole (4).

6. The powder metallurgy oil-impregnated bearing according to claim 2, characterized in that: The overall height of the support frame (7) and the adjusting block (9) after insertion is at the same level as the outer surface of the outer ring (1). The inner end of the oil injection hole (4) is connected to the ball moving cavity connected between the inner ring (2) and the outer ring (1).

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