Powder metallurgy oil bearing with double-layer composite structure

Abstract

The utility model discloses a powder metallurgy oil-retaining bearing with a double-layer composite structure, and particularly relates to the technical field of oil-retaining bearings, the powder metallurgy oil-retaining bearing comprises a bearing inner ring and two bearing outer rings, the two bearing outer rings are both located on the outer side of the bearing inner ring, and an oil injection assembly is arranged in each bearing outer ring. The oil injection assembly comprises a second lead screw, a sliding block, a spring, an extrusion plate, a sponge, an outer threaded block, a connecting ring and a second threaded sleeve. The rear end of the second lead screw penetrates through the extrusion plate, the sponge and the outer threaded block and is fixedly connected with the bearing outer ring. The second threaded sleeve is rotated to be far away from the second lead screw, so that locking among the sliding block, the extrusion plate and the second lead screw is relieved, the extrusion plate is disassembled and overhauled, the external threaded block is rotated to be far away from the connecting ring, fixing between the sponge and the bearing outer ring is relieved, the sponge is disassembled and overhauled, operation is simple, and practicability is high. And the extrusion plate and the sponge can be conveniently detached and replaced.

Description

Technical Field

[0001] This utility model relates to the field of oil-impregnated bearing technology, and more specifically, to a powder metallurgy oil-impregnated bearing with a double-layer composite structure. Background Technology

[0002] Oil-impregnated bearings are typically made of powder metallurgy materials, which have numerous tiny pores inside. During the manufacturing process, these pores are filled with a suitable amount of lubricating oil. When the bearing is working, the relative motion between the shaft and the bearing generates heat, causing the lubricating oil to expand and seep out from the pores, forming an oil film on the contact surface between the shaft and the bearing. This film lubricates the surface and reduces friction. When the bearing stops working, the lubricating oil is drawn back into the pores due to cooling, thus achieving automatic lubrication.

[0003] A search revealed that Chinese patent CN221838757U discloses an oil-containing powder metallurgy bearing capable of storing oil. In this invention, during the use of the bearing, a weight shakes inside the collection tank, causing the weight to strike a sponge. Through the impact of the weight, the sponge is subjected to force, facilitating the discharge of internal lubricating oil through the oil drain hole, thereby improving the lubrication effect.

[0004] When the above-mentioned oil-impregnated bearing is in use, the inside of the collection tank is equipped with a connecting rope and a sponge, and a counterweight is installed at the bottom of the connecting rope. However, it is inconvenient to disassemble and replace the sponge and the counterweight. After long-term use, the sponge and the counterweight may be damaged, aged, or have oil accumulation, making it difficult to effectively store and release lubricating oil, affecting the lubrication effect of the bearing, and requiring replacement or cleaning. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a powder metallurgy oil-impregnated bearing with a double-layer composite structure, which aims to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-layer composite powder metallurgy oil-impregnated bearing, comprising an inner bearing ring and two outer bearing rings, both of which are located outside the inner bearing ring. An oil injection assembly is provided inside each outer bearing ring. The oil injection assembly includes a second lead screw, a slider, a spring, an extrusion plate, a sponge, an external threaded block, a connecting ring, and a second threaded sleeve. The rear end of the second lead screw passes through the extrusion plate, the sponge, and the external threaded block and is fixedly connected to the outer bearing ring. The slider, the spring, and the second threaded sleeve are all movably sleeved on the second lead screw. The front and rear ends of the spring are fixedly connected to the slider and the extrusion plate, respectively. The outer side of the external threaded block is threadedly connected to the connecting ring, and the front end of the external threaded block is fixedly connected to the sponge. The connecting ring is fixedly installed inside the outer bearing ring. The rear end of the second threaded sleeve is fixedly connected to the slider. Multiple oil injection assemblies are provided.

[0007] Furthermore, a plug rod is fixedly connected to the front end of the second lead screw, and the front end of the plug rod extends into the interior of the bearing inner ring.

[0008] As can be seen, in the above technical solution, inserting the insert rod into the inner ring of the bearing can improve the stability between the inner ring and the outer ring of the bearing.

[0009] Furthermore, two second washers are fixedly connected inside the outer rings of both bearings, and one side of each of the second washers is in contact with the inner ring of the bearing.

[0010] As can be seen, in the above technical solution, the four second shims can improve the stability between the two bearing outer rings and the bearing inner ring.

[0011] Furthermore, the top and bottom of the bearing inner ring are movably provided with cover plates, and a first gasket is fixedly connected to one side of each of the two cover plates facing each other.

[0012] As can be seen, in the above technical solution, the two first gaskets can improve the stability between the two bearing outer rings and the two cover plates.

[0013] Furthermore, a connecting assembly is provided between the two cover plates, the connecting assembly including multiple pressure plates, multiple first lead screws and multiple first threaded sleeves.

[0014] Furthermore, the plurality of pressure plates are respectively located inside the two cover plates, one end of the plurality of first lead screws respectively passes through the plurality of pressure plates, the two bearing outer rings and the two cover plates, and the plurality of first threaded sleeves are respectively movably sleeved on the plurality of first lead screws.

[0015] Furthermore, each of the multiple pressure plates is fixedly connected to a vertical plate on one side.

[0016] It can be seen that the above technical solution is designed to facilitate the vertical movement of the pressure plate.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] 1. This utility model releases the lock between the slider, the extrusion plate and the second screw by rotating the second threaded sleeve away from the second screw, allowing the extrusion plate to be disassembled and repaired. Rotating the external threaded block away from the connecting ring releases the fixation between the sponge and the outer ring of the bearing, allowing the sponge to be disassembled and repaired. Similarly, the extrusion plate and the sponge can be installed. The operation is simple and convenient for disassembling and replacing the extrusion plate and the sponge.

[0019] 2. This utility model releases the fixation between the pressure plate, cover plate and bearing outer ring by rotating the first threaded sleeve away from the first lead screw, and vertically moving the upright plate away from the cover plate. Similarly, the other pressure plates are disassembled to release the fixation between the two bearing outer rings. Similarly, the two bearing outer rings and the two cover plates are connected and fixed. The operation is simple and convenient. Attached Figure Description

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

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

[0022] Figure 2 This is a bottom view of the overall structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the assembly structure of the bearing inner ring and connecting components of this utility model;

[0024] Figure 4 This is a schematic diagram of the assembly structure of the bearing outer ring and the oil injection assembly of this utility model;

[0025] Figure 5 This is a schematic diagram of the oil injection component structure of this utility model.

[0026] In the diagram: 1. Inner ring of bearing; 2. Outer ring of bearing; 3. Cover plate; 4. Connecting assembly; 5. First gasket; 6. Oil injection assembly; 7. Second gasket; 401. Pressure plate; 402. First lead screw; 403. First threaded sleeve; 601. Second lead screw; 602. Slider; 603. Spring; 604. Extrusion plate; 605. Sponge; 606. External threaded block; 607. Connecting ring; 608. Second threaded sleeve; 609. Insert rod. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Refer to the instruction manual appendix Figure 1-5 This embodiment describes a double-layer composite powder metallurgy oil-impregnated bearing, comprising an inner bearing ring 1 and two outer bearing rings 2, with both outer bearing rings 2 located outside the inner bearing ring 1. An oil injection assembly 6 is disposed inside the outer bearing ring 2. The oil injection assembly 6 includes a second lead screw 601, a slider 602, a spring 603, an extrusion plate 604, a sponge 605, an external threaded block 606, a connecting ring 607, and a second threaded sleeve 608. The rear end of the second lead screw 601 passes through the extrusion plate 604, the sponge 605, and the external threaded block 606. The slider 602, spring 603, and second threaded sleeve 608 are all movably sleeved on the second lead screw 601 and are fixedly connected to the outer ring 2 of the bearing. The front and rear ends of the spring 603 are fixedly connected to the slider 602 and the extrusion plate 604, respectively. The outer side of the external threaded block 606 is threadedly connected to the connecting ring 607, and the front end of the external threaded block 606 is fixedly connected to the sponge 605. The connecting ring 607 is fixedly installed inside the outer ring 2 of the bearing. The rear end of the second threaded sleeve 608 is fixedly connected to the slider 602. There are multiple oil injection components 6.

[0029] Furthermore, the front end of the second lead screw 601 is fixedly connected to a plug rod 609, and the front end of the plug rod 609 extends into the interior of the bearing inner ring 1.

[0030] Furthermore, two second washers 7 are fixedly connected inside the two outer rings 2 of the bearing, and one side of each of the second washers 7 is in contact with the inner ring 1 of the bearing. The top and bottom of the inner ring 1 of the bearing are movably provided with cover plates 3, and the opposite sides of the two cover plates 3 are fixedly connected with first washers 5.

[0031] Furthermore, a connecting assembly 4 is provided between the two cover plates 3. The connecting assembly 4 includes multiple pressure plates 401, multiple first lead screws 402, and multiple first threaded sleeves 403. The multiple pressure plates 401 are respectively located inside the two cover plates 3. One end of the multiple first lead screws 402 passes through the multiple pressure plates 401, the two bearing outer rings 2, and the two cover plates 3 respectively. The multiple first threaded sleeves 403 are respectively movably sleeved on the multiple first lead screws 402. A vertical plate is fixedly connected to one side of each of the multiple pressure plates 401.

[0032] Specifically, rotating the first threaded sleeve 403 away from the first lead screw 402 releases the fixation between the pressure plate 401, the cover plate 3, and the outer ring 2 of the bearing. Vertically moving the upright plate away from the cover plate 3, and similarly disassembling the other pressure plates 401, releases the fixation between the two outer rings 2 of the bearing. Similarly, the two outer rings 2 of the bearing and the two cover plates 3 are connected and fixed. The two first washers 5 can improve the stability between the two outer rings 2 of the bearing and the two cover plates 3. The operation is simple and convenient. At the same time, the four second washers 7 can improve the stability between the two outer rings 2 of the bearing and the inner ring 1 of the bearing.

[0033] The usage method of this embodiment is as follows:

[0034] In use, when the inner ring 1 of the bearing rotates, it drives the extrusion plate 604 to rotate, which in turn squeezes the sponge 605, causing the oil inside the sponge 605 to overflow. When the inner ring 1 of the bearing stops rotating, the spring 603 rebounds and drives the extrusion plate 604 to reset. Rotating the second threaded sleeve 608 and moving it away from the second lead screw 601 releases the lock between the slider 602, the extrusion plate 604, and the second lead screw 601, allowing the extrusion plate 604 to be disassembled and inspected. Rotating the external threaded block 606 and moving it away from the connecting ring 607 releases the fixation between the sponge 605 and the outer ring 2 of the bearing, allowing the sponge 605 to be disassembled and inspected. Similarly, the extrusion plate 604 and the sponge 605 can be installed. The operation is simple and convenient for disassembling and replacing the extrusion plate 604 and the sponge 605. At the same time, the insertion rod 609 is inserted into the inner ring 1 of the bearing, which can improve the stability between the inner ring 1 and the outer ring 2 of the bearing.

[0035] All contents not described in detail in the specification are existing technologies known to those skilled in the art. The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A powder metallurgy oil-impregnated bearing with a double-layer composite structure, comprising an inner bearing ring (1) and two outer bearing rings (2), wherein both outer bearing rings (2) are located outside the inner bearing ring (1), characterized in that: An oil injection assembly (6) is provided inside the outer ring (2) of the bearing. The oil injection assembly (6) includes a second lead screw (601), a slider (602), a spring (603), a pressing plate (604), a sponge (605), an external thread block (606), a connecting ring (607), and a second threaded sleeve (608). The rear end of the second lead screw (601) passes through the pressing plate (604), the sponge (605), and the external thread block (606) and is fixedly connected to the outer ring (2) of the bearing. The slider (602), the spring (603), and the second threaded sleeve (608) are also provided inside the bearing. All sleeves (608) are movably sleeved on the second lead screw (601). The front and rear ends of the spring (603) are fixedly connected to the slider (602) and the extrusion plate (604) respectively. The outer side of the external threaded block (606) is threadedly connected to the connecting ring (607), and the front end of the external threaded block (606) is fixedly connected to the sponge (605). The connecting ring (607) is fixedly installed inside the outer ring (2) of the bearing. The rear end of the second threaded sleeve (608) is fixedly connected to the slider (602). There are multiple oil injection components (6).

2. The powder metallurgy oil-impregnated bearing with a double-layer composite structure according to claim 1, characterized in that: The front end of the second lead screw (601) is fixedly connected to a plug rod (609), and the front end of the plug rod (609) extends into the interior of the bearing inner ring (1).

3. The powder metallurgy oil-impregnated bearing with a double-layer composite structure according to claim 1, characterized in that: Two second washers (7) are fixedly connected inside the two outer rings (2) of the bearing, and one side of each of the second washers (7) is in contact with the inner ring (1) of the bearing.

4. The powder metallurgy oil-impregnated bearing with a double-layer composite structure according to claim 1, characterized in that: The bearing inner ring (1) is movably provided with cover plates (3) at the top and bottom, and the two cover plates (3) are fixedly connected with first gaskets (5) on opposite sides.

5. The powder metallurgy oil-impregnated bearing with a double-layer composite structure according to claim 4, characterized in that: A connecting assembly (4) is provided between the two cover plates (3), the connecting assembly (4) including multiple pressure plates (401), multiple first lead screws (402) and multiple first threaded sleeves (403).

6. The powder metallurgy oil-impregnated bearing with a double-layer composite structure according to claim 5, characterized in that: Multiple pressure plates (401) are located inside two cover plates (3), and one end of multiple first screw rods (402) passes through multiple pressure plates (401), two bearing outer rings (2) and two cover plates (3), and multiple first threaded sleeves (403) are movably sleeved on multiple first screw rods (402).

7. The powder metallurgy oil-impregnated bearing with a double-layer composite structure according to claim 1, characterized in that: Each of the multiple pressure plates (401) has a vertical plate fixedly connected to one side.

Images