Self-lubricating bearing

Abstract

The utility model discloses a self-lubricating bearing which comprises an inner-layer bearing layer, an outer-layer wear-resistant protective shell is connected outside the inner-layer bearing layer, and a solid lubricant layer is arranged between the inner-layer bearing layer and the outer-layer wear-resistant protective shell. The solid lubricant layer is composed of a solid lubricant carrier and a solid lubricant filled in the solid lubricant carrier, a plurality of solid lubricant mounting through grooves are annularly formed in the solid lubricant carrier at equal intervals, and a plurality of through holes are annularly formed in the inner bearing layer at equal intervals. Through the unique layered design, the solid lubricant layer is convenient to replace, the maintenance difficulty is greatly reduced, the maintenance time and cost are saved, meanwhile, the pushing mechanism and the convex key inclined surface are utilized, the problem of insufficient subsequent supplement of the solid lubricant is effectively solved, a good lubricating effect is maintained in the whole service life period, the friction coefficient is reduced, and the service life is prolonged. And efficient installation and stability of the solid lubricant carrier are achieved, and stable operation of the bearing is guaranteed.

Description

Technical Field

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

[0002] Self-lubricating bearings play a crucial role in industrial production and numerous mechanical applications, enabling them to maintain operation without the need for additional lubrication.

[0003] However, traditional self-lubricating bearings have many problems that urgently need to be solved. On the one hand, the solid lubricant in existing self-lubricating bearings, after long-term use, lacks a convenient replacement mechanism. Once depleted, the lubrication performance of the bearing drops sharply, often requiring the replacement of the entire bearing. This not only increases maintenance costs but also leads to prolonged equipment downtime, seriously affecting production efficiency. For example, in some continuously operating production lines, frequent bearing replacements can cause production stoppages and result in huge economic losses.

[0004] On the other hand, traditional designs lack effective active propulsion structures for the delivery and replenishment of solid lubricants. As usage time increases, the solid lubricant near the friction surface is rapidly consumed, and subsequent lubricants cannot be replenished to this area in a timely and efficient manner. This causes the bearing's friction coefficient to increase significantly in the later stages of operation, exacerbating wear and greatly shortening the bearing's service life. It is difficult to meet the requirements of modern industry for high stability and long service life of equipment.

[0005] Therefore, we propose a self-lubricating bearing. Utility Model Content

[0006] The main objective of this invention is to provide a self-lubricating bearing that prevents the need to replace the entire bearing due to the lack of a convenient replacement mechanism after the solid lubricant is depleted, which leads to increased maintenance costs, prolonged equipment downtime, and reduced production efficiency. It also prevents the lack of an effective active propulsion structure from hindering the timely and efficient replenishment of solid lubricant to the friction surface, thus causing an increase in the friction coefficient, accelerated wear, and shortened service life in the later stages of bearing operation. Therefore, this invention improves the stability of the lubrication performance of the self-lubricating bearing, reduces maintenance costs, minimizes equipment downtime, increases production efficiency, and meets the requirements of modern industry for high stability and long service life of equipment. It effectively solves the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A self-lubricating bearing includes an inner bearing layer and an outer wear-resistant protective shell connected to the outside of the inner bearing layer. A solid lubricant layer is disposed between the inner bearing layer and the outer wear-resistant protective shell. The solid lubricant layer is composed of a solid lubricant carrier and solid lubricant filled inside the solid lubricant carrier. A plurality of solid lubricant mounting slots are arranged annularly at equal intervals on the solid lubricant carrier. A plurality of through holes are arranged annularly at equal intervals on the inner bearing layer. The through holes are connected to the solid lubricant mounting slots.

[0009] The inner wall of the outer wear-resistant protective shell has multiple grooves arranged in a ring at equal intervals, and a pushing mechanism for pushing solid lubricant is provided in the grooves.

[0010] By adopting the above technical solution, solid lubricant is filled in the solid lubricant mounting groove inside the solid lubricant carrier, and the through holes on the inner bearing layer are connected to the solid lubricant mounting groove. This provides a channel for the solid lubricant to reach the surface of the inner bearing layer, so that the solid lubricant can reach the friction surface between the inner bearing layer and the shaft through these channels when needed.

[0011] Once the bearing starts operating, the solid lubricant will gradually be consumed over time and with the progress of friction. At this point, the pushing mechanism inside the inner wall groove of the outer wear-resistant protective shell begins to function. The pushing mechanism can move along the groove and applies a force to the solid lubricant towards the inner bearing layer. This force causes the solid lubricant to move from the solid lubricant mounting groove through the through-hole of the inner bearing layer to the friction surface between the inner bearing layer and the shaft. In this way, even if the solid lubricant is consumed in the area near the friction surface, the pushing mechanism can ensure that new solid lubricant is replenished to the friction surface in a timely manner, thereby maintaining a good lubrication effect, reducing the coefficient of friction during bearing operation, and extending the service life of the bearing.

[0012] Furthermore, the solid lubricant carrier is located inside the solid lubricant mounting slot, and the number and position of the solid lubricant mounting slot, groove and through hole correspond one-to-one.

[0013] By adopting the above technical solution, when the pushing mechanism moves in the slide, due to the one-to-one correspondence of the positions, it can accurately act on the solid lubricant in the solid lubricant mounting slot. The force applied by the pushing mechanism will push the solid lubricant from the solid lubricant mounting slot to the corresponding through hole. The through hole provides a path for the solid lubricant to reach the surface of the inner bearing layer, so that the solid lubricant can smoothly reach the friction surface between the inner bearing layer and the shaft from the solid lubricant mounting slot in the storage position through the through hole. This ensures that the friction area can obtain sufficient solid lubricant in time during the bearing operation, thereby effectively reducing the coefficient of friction and ensuring good lubrication and normal operation of the bearing.

[0014] Furthermore, the pushing mechanism includes a convex key that is slidably connected inside the slide groove and inside the solid lubricant mounting slot. The cross-section of the convex key is trapezoidal, and the inclined surface of the convex key is in contact with the solid lubricant. A spring is provided between the convex key and the inner wall of the slide groove.

[0015] By adopting the above technical solution, because the cross-section of the convex key is trapezoidal and the inclined surface is in contact with the solid lubricant, when the convex key moves in the groove towards the solid lubricant, its inclined surface will apply an oblique thrust to the solid lubricant. This thrust can be decomposed into a pressure perpendicular to the surface of the solid lubricant and a horizontal thrust pointing towards the inner bearing layer. The pressure perpendicular to the surface of the solid lubricant will compact the solid lubricant in the solid lubricant mounting slot, while the horizontal thrust will push the solid lubricant through the solid lubricant mounting slot and the corresponding through hole, so that the solid lubricant moves towards the friction surface between the inner bearing layer and the shaft, thereby replenishing the solid lubricant and maintaining a good lubrication effect.

[0016] When installing the solid lubricant layer, multiple solid lubricant mounting slots are arranged equidistantly in a ring on the solid lubricant carrier, and a convex key is slidably connected inside the slide groove and the solid lubricant mounting slot. At this time, under the action of a spring, the convex key may be positioned near one end of the slide groove, with its inclined surface facing the opening of the solid lubricant mounting slot. When the solid lubricant layer, including the solid lubricant carrier and the internally filled solid lubricant, is installed between the inner bearing layer and the outer wear-resistant protective shell, the solid lubricant mounting slot needs to be aligned with the through-hole on the inner bearing layer and the slide groove on the inner wall of the outer wear-resistant protective shell. Because the inclined surface of the convex key contacts the solid lubricant, this inclined surface acts as a guide. When the solid lubricant... When the lubricant carrier approaches the key, the angle of the ramp makes it easier for the solid lubricant carrier to slide into the correct position, reducing obstacles caused by positional deviations during installation. The shape of the ramp allows the solid lubricant carrier to be gradually guided along the ramp to a position that is accurately aligned with the groove and through hole as it approaches the key, reducing installation difficulty and improving installation accuracy and efficiency. After installation, the key will exert a certain pressure on the solid lubricant carrier under the action of the spring. At this time, the contact between the ramp and the solid lubricant helps to further fix the position of the solid lubricant carrier, preventing it from shifting during bearing operation and ensuring that the solid lubricant layer can stably perform its lubricating function.

[0017] Furthermore, a first flange is provided at one end of the inner bearing layer, and a second flange is provided at one end of the outer wear-resistant protective shell.

[0018] By adopting the above technical solution, the first flange and the second flange are mainly used to connect the inner bearing layer and the outer wear-resistant protective shell.

[0019] Furthermore, the inner wall of the first flange is provided with an internal thread groove, and the outer wall of the second flange is provided with an external thread groove, wherein the external thread groove and the internal thread groove are threadedly connected.

[0020] By adopting the above technical solution, when assembling the bearing, the external thread groove on the second flange at one end of the outer wear-resistant protective shell is aligned with the internal thread groove on the inner wall of the first flange at one end of the inner bearing layer. Then, by rotating the outer wear-resistant protective shell, the external thread groove is gradually screwed into the internal thread groove. As the threads engage, the distance between the first and second flanges gradually decreases until they are tightly fitted. This threaded connection method can provide a strong axial clamping force, firmly connecting the outer wear-resistant protective shell and the inner bearing layer together, ensuring that no axial displacement occurs between the layers during bearing operation, and maintaining the stability of the bearing structure.

[0021] Furthermore, the outer wall of the inner bearing layer has a plurality of protrusions arranged equidistantly in a ring, and the inner wall of the solid lubricant layer has a plurality of grooves arranged equidistantly in a ring to mate with the protrusions.

[0022] By adopting the above technical solution, during assembly, the inner bearing layer protrusions are aligned and fitted with the solid lubricant layer grooves. The protrusions are embedded in the grooves to achieve radial positioning, ensuring that the two layers are tightly fitted and relatively stationary in the circumferential direction. When the inner bearing layer rotates, it can drive the solid lubricant layer to rotate synchronously, ensuring coordinated operation.

[0023] When the bearing is working, the load borne by the inner bearing layer, such as radial force, is transmitted to the groove of the solid lubricant layer through the protrusions. Because the protrusions and grooves are arranged in a ring at equal intervals, the load is evenly distributed on the inner surface of the solid lubricant layer. At the same time, the groove of the solid lubricant layer generates a reaction force on the protrusion, maintaining the stability of the inner bearing layer, improving the overall bearing capacity of the bearing, and avoiding damage due to excessive local stress.

[0024] The engagement of the bumps and grooves does not affect the transfer of solid lubricant from the solid lubricant layer to the inner bearing layer. During operation, the solid lubricant can reach the friction surface through the solid lubricant installation slots and holes. The connection between the bumps and grooves ensures the stability of the relative positions of the two layers, allowing the solid lubricant to be transported and used in a stable environment, effectively exerting its lubricating effect and reducing the coefficient of friction.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) This utility model provides a self-lubricating bearing. Through a unique layered design, the solid lubricant layer is independently set up to consist of a solid lubricant carrier and solid lubricant filling it. When the solid lubricant is consumed due to long-term use, the operator only needs to remove the outer wear-resistant protective shell to directly contact the solid lubricant layer. The old solid lubricant carrier and the remaining lubricant can be easily removed and replaced with a brand new carrier filled with solid lubricant. This process does not require complicated tools or professional skills, which greatly reduces the difficulty of maintenance. Compared with the traditional integral self-lubricating bearing, which requires the replacement of the entire bearing, it greatly saves maintenance time and cost.

[0027] (2) In this utility model, a self-lubricating bearing is provided. As the solid lubricant is gradually consumed on the friction surface, the pushing mechanism can move along the slide groove and precisely apply a force to the solid lubricant in the direction of the inner bearing layer. This force causes the solid lubricant to move continuously from the solid lubricant installation groove through the through hole of the inner bearing layer to the friction surface between the inner bearing layer and the shaft. This active pushing mechanism effectively solves the problem of insufficient subsequent replenishment of solid lubricant in traditional self-lubricating bearings, ensuring that the friction surface is always covered with sufficient solid lubricant throughout the entire service life of the bearing, maintaining a stable and good lubrication effect, and significantly reducing the friction coefficient during bearing operation. At the same time, the convex key inclined surface has an optimized solid lubricant pushing effect in the self-lubricating bearing, which can efficiently deliver it to the friction surface to maintain lubrication, facilitate the installation of the solid lubricant layer, quickly guide the carrier to slide into the correct position, and stabilize the position of the solid lubricant carrier to prevent displacement during operation, thus ensuring stable bearing operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a self-lubricating bearing according to the present invention.

[0029] Figure 2 This is a schematic diagram of the internal structure of a self-lubricating bearing according to the present invention.

[0030] Figure 3 This utility model relates to a self-lubricating bearing. Figure 2 Enlarged view of point A in the middle.

[0031] Figure 4 This is a schematic diagram of the protrusion and groove connection structure of a self-lubricating bearing according to this utility model.

[0032] In the diagram: 1. Inner bearing layer; 2. Outer wear-resistant protective shell; 3. Solid lubricant layer; 4. Slide groove; 5. Solid lubricant; 6. Through hole; 7. Solid lubricant mounting slot; 8. Raised key; 9. Spring; 10. First flange; 11. Second flange; 12. External thread groove; 13. Internal thread groove; 14. Protrusion; 15. Groove; 16. Solid lubricant carrier. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0034] To prevent the need to replace the entire bearing after the solid lubricant is depleted due to a lack of convenient replacement mechanisms, which would increase maintenance costs, extend equipment downtime, and affect production efficiency, and to prevent the lack of an effective active actuation structure that prevents the solid lubricant from being replenished to the friction surface in a timely and efficient manner, thus causing an increase in the friction coefficient, accelerated wear, and shortened service life in the later stages of bearing operation, this paper aims to improve the lubrication performance stability of self-lubricating bearings, reduce maintenance costs, minimize equipment downtime, improve production efficiency, and meet the requirements of modern industry for high stability and long service life of equipment. Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a self-lubricating bearing includes an inner bearing layer 1, an outer wear-resistant protective shell 2 connected to the outside of the inner bearing layer 1, and a solid lubricant layer 3 disposed between the inner bearing layer 1 and the outer wear-resistant protective shell 2. The solid lubricant layer 3 is composed of a solid lubricant carrier 16 and solid lubricant 5 filled inside the solid lubricant carrier 16. The solid lubricant carrier 16 has a plurality of solid lubricant mounting slots 7 arranged in an annular equidistant arrangement, and the inner bearing layer 1 has a plurality of through holes 6 arranged in an annular equidistant arrangement, the through holes 6 being connected to the solid lubricant mounting slots 7.

[0035] The inner wall of the outer wear-resistant protective shell 2 has a plurality of grooves 4 arranged in a ring at equal intervals, and a pushing mechanism for pushing the solid lubricant 5 is provided in the grooves 4.

[0036] In use, solid lubricant 5 is filled in the solid lubricant mounting groove 7 inside the solid lubricant carrier 16. The through hole 6 on the inner bearing layer 1 is connected to the solid lubricant mounting groove 7, which provides a channel for solid lubricant 5 to reach the surface of the inner bearing layer 1, so that solid lubricant 5 can reach the friction surface between the inner bearing layer 1 and the shaft through these channels when needed.

[0037] Once the bearing starts operating, the solid lubricant 5 will gradually be consumed over time and with the progress of friction. At this point, the pushing mechanism in the inner wall groove 4 of the outer wear-resistant protective shell 2 begins to function. The pushing mechanism can move along the groove 4 and will apply a force to the solid lubricant 5 in the direction of the inner bearing layer 1. This force will cause the solid lubricant 5 to move from the solid lubricant mounting groove 7 through the through hole 6 of the inner bearing layer 1 to the friction surface between the inner bearing layer 1 and the shaft. In this way, even if the solid lubricant 5 is consumed in the area close to the friction surface, the pushing mechanism can ensure that new solid lubricant 5 is replenished to the friction surface in a timely manner, thereby maintaining a good lubrication effect, reducing the coefficient of friction during bearing operation, and extending the service life of the bearing.

[0038] For example, such as Figure 2 , Figure 3 As shown, the present invention also includes the solid lubricant carrier 16 located inside the solid lubricant mounting groove 7, and the number and position of the solid lubricant mounting groove 7, the sliding groove 4 and the through hole 6 correspond one-to-one.

[0039] During use, when the pushing mechanism moves in the slide groove 4, due to the one-to-one correspondence of the positions, it can accurately act on the solid lubricant 5 in the solid lubricant mounting slot 7. The force applied by the pushing mechanism will push the solid lubricant 5 from the solid lubricant mounting slot 7 to the corresponding through hole 6. The through hole 6 provides a path for the solid lubricant 5 to reach the surface of the inner bearing layer 1, so that the solid lubricant 5 can smoothly reach the friction surface between the inner bearing layer 1 and the shaft from the storage position solid lubricant mounting slot 7 through the through hole 6. This ensures that during the operation of the bearing, the friction area can obtain sufficient solid lubricant 5 in time, thereby effectively reducing the coefficient of friction and ensuring good lubrication and normal operation of the bearing.

[0040] For example, such as Figure 3 As shown, the present invention also includes a push mechanism comprising a convex key 8 slidably connected inside the slide groove 4 and inside the solid lubricant mounting groove 7. The cross-section of the convex key 8 is trapezoidal, and the inclined surface of the convex key 8 is in contact with the solid lubricant 5. A spring 9 is provided between the convex key 8 and the inner wall of the slide groove 4.

[0041] When in use, because the cross-section of the convex key 8 is trapezoidal and the inclined surface is in contact with the solid lubricant 5, when the convex key 8 moves towards the solid lubricant 5 in the groove 4, its inclined surface will apply an oblique thrust to the solid lubricant 5. This thrust can be decomposed into a pressure perpendicular to the surface of the solid lubricant 5 and a horizontal thrust pointing towards the inner bearing layer 1. The pressure perpendicular to the surface of the solid lubricant 5 will cause the solid lubricant 5 to be compacted in the solid lubricant mounting groove 7, while the horizontal thrust will push the solid lubricant 5 through the solid lubricant mounting groove 7 and the corresponding through hole 6, so that the solid lubricant 5 moves towards the friction surface between the inner bearing layer 1 and the shaft, thereby replenishing the solid lubricant 5 and maintaining a good lubrication effect.

[0042] When installing the solid lubricant layer 3, since multiple solid lubricant mounting slots 7 are arranged equidistantly in a ring on the solid lubricant carrier 16, and the protruding key 8 is slidably connected inside the slide groove 4 and the solid lubricant mounting slot 7, the protruding key 8 may be positioned near one end of the slide groove 4 under the action of the spring 9, with its inclined surface facing the opening direction of the solid lubricant mounting slot 7. When the solid lubricant layer 3, including the solid lubricant carrier 16 and the solid lubricant 5 filled inside, is installed between the inner bearing layer 1 and the outer wear-resistant protective shell 2, the solid lubricant mounting slot 7 needs to be aligned with the through hole 6 on the inner bearing layer 1 and the slide groove 4 on the inner wall of the outer wear-resistant protective shell 2. Since the inclined surface of the protruding key 8 is in contact with the solid lubricant 5, this inclined surface plays a guiding role. When the solid lubricant carrier 16 approaches the protruding key 8, the inclined angle of the slope makes it easier for the solid lubricant carrier 16 to slide into the correct position, reducing the obstruction caused by positional deviation during installation. The shape of the slope allows the solid lubricant carrier 16 to be gradually guided along the slope to a position that is accurately aligned with the slide groove 4 and the through hole 6 when it approaches the protruding key 8, reducing the installation difficulty and improving the accuracy and efficiency of installation. After installation, the protruding key 8 will exert a certain pressure on the solid lubricant carrier 16 under the action of the spring 9. At this time, the contact between the slope and the solid lubricant 5 helps to further fix the position of the solid lubricant carrier 16, preventing it from shifting during bearing operation and ensuring that the solid lubricant layer 3 can stably perform its lubrication function.

[0043] For example, such as Figure 1 , Figure 2 As shown, the present invention also includes a first flange 10 provided at one end of the inner bearing layer 1 and a second flange 11 provided at one end of the outer wear-resistant protective shell 2.

[0044] In use, the first flange 10 and the second flange 11 are mainly used to connect the inner bearing layer 1 and the outer wear-resistant protective shell 2.

[0045] For example, such as Figure 3As shown, the present invention also includes an internal thread groove 13 provided on the inner wall of the first flange 10 and an external thread groove 12 provided on the outer wall of the second flange 11, wherein the external thread groove 12 is threadedly connected to the internal thread groove 13.

[0046] When assembling the bearing, align the external thread groove 12 on the second flange 11 at one end of the outer wear-resistant protective shell 2 with the internal thread groove 13 on the inner wall of the first flange 10 at one end of the inner bearing layer 1. Then, by rotating the outer wear-resistant protective shell 2, the external thread groove 12 is gradually screwed into the internal thread groove 13. As the threads engage, the distance between the first flange 10 and the second flange 11 gradually decreases until they are tightly fitted. This threaded connection method can provide a strong axial clamping force, firmly connecting the outer wear-resistant protective shell 2 and the inner bearing layer 1 together, ensuring that there is no axial displacement between the layers during bearing operation, and maintaining the stability of the bearing structure.

[0047] For example, such as Figure 4 As shown, the present invention also includes a plurality of protrusions 14 arranged equidistantly in an annular pattern on the outer wall of the inner bearing layer 1, and a plurality of grooves 15 arranged equidistantly in an annular pattern on the inner wall of the solid lubricant layer 3 to cooperate with the protrusions 14.

[0048] When in use, during assembly, the inner bearing layer 1 protrusion 14 is aligned and fitted with the solid lubricant layer 3 groove 15. The protrusion is embedded in the groove to achieve radial positioning, ensuring that the two layers are tightly fitted and relatively stationary in the circumferential direction. When the inner bearing layer rotates, it can drive the solid lubricant layer to rotate synchronously, ensuring coordinated operation.

[0049] When the bearing is working, the load borne by the inner bearing layer, such as radial force, is transmitted to the groove of the solid lubricant layer through the protrusions. Because the protrusions and grooves are arranged in a ring at equal intervals, the load is evenly distributed on the inner surface of the solid lubricant layer. At the same time, the groove of the solid lubricant layer generates a reaction force on the protrusion, maintaining the stability of the inner bearing layer, improving the overall bearing capacity of the bearing, and avoiding damage due to excessive local stress.

[0050] The engagement of the bumps and grooves does not affect the transfer of solid lubricant from the solid lubricant layer to the inner bearing layer. During operation, the solid lubricant can reach the friction surface through the solid lubricant installation slots and holes. The connection between the bumps and grooves ensures the stability of the relative positions of the two layers, allowing the solid lubricant to be transported and used in a stable environment, effectively exerting its lubricating effect and reducing the coefficient of friction.

[0051] It should be noted that this utility model is a self-lubricating bearing. The protrusion 14 on the outer wall of the inner bearing layer 1 is aligned with the groove 15 on the inner wall of the solid lubricant layer 3, and the solid lubricant layer 3 is fitted onto the inner bearing layer 1 to complete the connection setting of radial positioning and synchronous rotation in the circumferential direction.

[0052] Place the assembled inner bearing layer 1 and solid lubricant layer 3 assembly, align the external thread groove 12 of the second flange 11 at one end of the outer wear-resistant protective shell 2 with the internal thread groove 13 on the inner wall of the first flange 10 at one end of the inner bearing layer 1, rotate the outer wear-resistant protective shell 2 so that the external thread groove 12 is screwed into the internal thread groove 13 until the first and second flanges fit tightly together to achieve axial fastening.

[0053] When the bearing is working, the solid lubricant 5 flows from the solid lubricant mounting groove 7 of the solid lubricant carrier 16 through the through hole 6 of the inner bearing layer 1 to the friction surface between the inner bearing layer 1 and the shaft, where it provides lubrication. As the solid lubricant 5 is consumed, the protruding key 8 in the sliding groove 4 on the inner wall of the outer wear-resistant protective shell 2 moves toward the solid lubricant 5 under the action of the spring 9. Its inclined surface pushes the solid lubricant 5 through the solid lubricant mounting groove 7 and the through hole 6 to replenish the friction surface.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating bearing, comprising an inner bearing layer (1), characterized in that, An outer wear-resistant protective shell (2) is connected to the outer side of the inner bearing layer (1). A solid lubricant layer (3) is provided between the inner bearing layer (1) and the outer wear-resistant protective shell (2). The solid lubricant layer (3) is composed of a solid lubricant carrier (16) and solid lubricant (5) filled inside the solid lubricant carrier (16). A plurality of solid lubricant mounting slots (7) are arranged equidistantly in an annular pattern on the solid lubricant carrier (16). A plurality of through holes (6) are arranged equidistantly in an annular pattern on the inner bearing layer (1). The through holes (6) are connected to the solid lubricant mounting slots (7). The inner wall of the outer wear-resistant protective shell (2) has a plurality of grooves (4) arranged in a ring at equal intervals, and a pushing mechanism for pushing solid lubricant (5) is provided in the grooves (4).

2. The self-lubricating bearing according to claim 1, characterized in that: The solid lubricant carrier (16) is located inside the solid lubricant mounting groove (7), and the number and position of the solid lubricant mounting groove (7), the sliding groove (4) and the through hole (6) correspond one-to-one.

3. A self-lubricating bearing according to claim 1, characterized in that: The pushing mechanism includes a convex key (8) that is slidably connected inside the slide groove (4) and the solid lubricant mounting groove (7). The cross-section of the convex key (8) is trapezoidal, and the inclined surface of the convex key (8) is in contact with the solid lubricant (5). A spring (9) is provided between the convex key (8) and the inner wall of the slide groove (4).

4. A self-lubricating bearing according to claim 3, characterized in that: One end of the inner bearing layer (1) is provided with a first flange (10), and one end of the outer wear-resistant protective shell (2) is provided with a second flange (11).

5. A self-lubricating bearing according to claim 4, characterized in that: The inner wall of the first flange (10) is provided with an internal thread groove (13), and the outer wall of the second flange (11) is provided with an external thread groove (12). The external thread groove (12) is threadedly connected to the internal thread groove (13).

6. A self-lubricating bearing according to claim 1, characterized in that: The outer wall of the inner bearing layer (1) has a plurality of protrusions (14) arranged in an annular equidistant pattern, and the inner wall of the solid lubricant layer (3) has a plurality of grooves (15) arranged in an annular equidistant pattern to cooperate with the protrusions (14).

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