Self-lubricating heavy-duty bearing

Abstract

The invention discloses a self-lubricating heavy-duty bearing, and belongs to the technical field of bearings. The heavy-duty bearing comprises an outer ring, an inner ring arranged on the inner side of the outer ring, a supporting frame arranged between the outer ring and the inner ring, balls rotationally arranged on the supporting frame, annularly distributed and used for making rolling contact with the outer side of the inner ring and the inner side of the outer ring, and an oil storage assembly arranged on the inner ring. The heavy-duty bearing further comprises a negative pressure lubricating assembly which is arranged on the outer side of the inner ring, communicated with the oil storage assembly and used for rotating along with the inner ring to make contact with the balls so that lubricating oil can be discharged and sucked in. According to the self-lubricating heavy-duty bearing, through extrusion and suction mechanisms of the negative-pressure lubricating assembly, when the balls make contact with the negative-pressure lubricating assembly, the negative-pressure lubricating assembly is extruded and releases lubricating oil in the oil storage assembly for lubrication, and when the balls do not make contact with the negative-pressure lubricating assembly, the negative-pressure lubricating assembly generates negative pressure to suck redundant lubricating oil, and waste is reduced.

Description

Technical Field

[0001] This application relates to the technical field of bearings, and specifically to a self-lubricating heavy-duty bearing. Background Art

[0002] A heavy-duty bearing refers to a bearing that can withstand large loads or high-intensity working conditions. Usually, heavy-duty bearings are used in machinery and equipment that bear large pressures, heavy objects, or operate at high speeds, such as mining machinery, metallurgical equipment, and heavy industrial machinery. The design features of these bearings are to provide higher load-bearing capacity, stronger durability, and longer service life to meet the requirements of working under high loads and harsh environments.

[0003] The Chinese utility model patent with the publication number CN208330985U discloses a lubricating oil path structure for a heavy-duty bearing. By re-setting the oil supply pipeline, it avoids the oil supply pipeline being soaked in the coolant, the oil supply pipeline is simpler in setting, and maintenance and repair are more convenient. However, this lubricating oil path structure can directly provide lubrication for the bearing through the oil outlet holes. However, due to the single design of the oil outlet holes, the amount of lubricating oil entering the bearing is often fixed, which easily leads to a significant increase in friction and wear when the load is heavy, resulting in insufficient lubrication. On the contrary, when the load is light, it will cause waste of lubricating oil.

[0004] Therefore, this application provides a self-lubricating heavy-duty bearing to solve the above problems. Summary of the Invention

[0005] This application provides a self-lubricating heavy-duty bearing, aiming to solve the problems in the background art that the existing lubricating oil path structure of heavy-duty bearings only supplies oil through the oil inlet holes for lubrication, and the design of its oil outlet holes is single, resulting in the inability to automatically adjust the amount of lubricating oil according to the load, and it is easy to have insufficient lubrication when the load is heavy or waste when the load is light.

[0006] To achieve the above object, this application provides the following technical solution: A self-lubricating heavy-duty bearing includes an outer ring, an inner ring disposed inside the outer ring, a support frame disposed between the outer ring and the inner ring, balls rotatably disposed on the support frame and distributed in a ring shape for rolling contact with the outer side of the inner ring and the inner side of the outer ring, and an oil storage assembly disposed on the inner ring;

[0007] The heavy-duty bearing further includes a negative-pressure lubrication component disposed outside the inner ring and communicating with the oil storage component, which rotates with the inner ring and contacts the rolling balls to discharge and suck lubricating oil, a filter screen disposed on the negative-pressure lubrication component, and a vibration component disposed on the negative-pressure lubrication component to shake the filter screen as the negative-pressure lubrication component moves; through the extrusion and suction mechanism of the negative-pressure lubrication component, the heavy-duty bearing can automatically adjust the flow rate of the lubricating oil according to the contact state of the rolling balls. When the rolling balls contact the negative-pressure lubrication component, the negative-pressure lubrication component is extruded and releases the lubricating oil in the oil storage component for lubrication. When the rolling balls are not in contact, the negative-pressure lubrication component generates a negative pressure to suck the excess lubricating oil. This adjustment method ensures that the lubricating oil volume is closely related to the contact state of the rolling balls, thereby automatically adjusting the lubricating oil volume when the bearing load changes, reducing waste. At the same time, the design of the filter screen can filter the lubricating oil entering the negative-pressure lubrication component to prevent impurities from entering and affecting the use effect and service life of the negative-pressure lubrication component, which helps to maintain the cleanliness and lubrication effect inside the bearing. The design of the vibration component can shake the filter screen after the rolling balls contact the negative-pressure lubrication component, thereby reducing the adhesion of impurities on the filter screen, which helps to keep the filter screen clean and unobstructed, ensure the use effect of the filter screen, and extend its service life.

[0008] Preferably, to facilitate injecting the stored lubricating oil into the negative-pressure lubrication component, the oil storage component includes an oil storage cavity opened in the inner ring and oil outlet holes opened outside the inner ring and distributed in an annular array. Both ends of the oil outlet holes communicate with the oil storage cavity and the negative-pressure lubrication component respectively; the combined design of the oil storage cavity and the oil outlet holes enables the lubricating oil in the oil storage cavity to be smoothly injected into the negative-pressure lubrication component through the centrifugal force generated by its rotation when the inner ring rotates, which is simple and fast.

[0009] Preferably, to facilitate the use of the oil storage component, an oil filling hole communicating with the oil storage cavity is opened on one side of the inner ring; the design of the oil filling hole enables the user to conveniently add lubricating oil to the oil storage cavity through this hole, simplifies the process of adding lubricating oil, improves the usability of the oil storage component, and the user can replenish the lubricating oil without disassembling the entire bearing.

[0010] Preferably, to ensure the sealing performance of the oil storage component during use, a sealing plug is inserted at the oil filling hole, a bolt is provided on the sealing plug, and the sealing plug is fixedly connected to the inner ring through the bolt; by inserting the sealing plug and fixing it with the bolt, the oil filling hole can be tightly closed, effectively preventing the lubricating oil from leaking from the oil filling hole during the operation of the bearing. This design ensures that the lubricating oil inside the bearing will not be reduced due to leakage, thereby maintaining the good lubrication state of the bearing. At the same time, the combined design of the sealing plug and the bolt can also prevent external impurities from entering the bearing through the oil filling hole.

[0011] Preferably, in order to facilitate the extrusion and suction of lubricating oil, the negative-pressure lubrication assembly includes an elastic bladder fixedly arranged at a position corresponding to the oil outlet hole outside the inner ring and communicating with the inside of the oil outlet hole for contacting the ball, and an overflow hole opened on the side of the elastic bladder close to the ball, and the filter screen is arranged in the overflow hole; the combined design of the elastic bladder and the overflow hole enables the extrusion of lubricating oil when the ball contacts and squeezes the elastic bladder during the rotation of the inner ring, providing necessary lubrication for the ball. When the elastic bladder is not squeezed, its elastic action can recover and generate negative pressure, thereby sucking in excess lubricating oil to ensure the recycling of lubricating oil.

[0012] Preferably, in order to increase the contact area between the elastic bladder and the ball, a plurality of corrugations for contacting the ball are fixedly arranged on one side of the elastic bladder corresponding to the overflow hole, and the plurality of corrugations are located outside the overflow hole; the design of the plurality of corrugations can increase the contact area with the ball, so that under the same pressure, the ball can more effectively squeeze the elastic bladder, thereby extruding more lubricating oil and providing sufficient lubrication for the ball.

[0013] Preferably, in order to avoid affecting the rolling of the ball, the edge of the corrugation is in an arc structure; the design of the arc structure at the edge of the corrugation can achieve a smooth transition, reduce the friction and interference with the ball, contribute to ensuring the smooth rolling of the ball inside the bearing, and ensuring the operating efficiency of the bearing.

[0014] Preferably, in order to facilitate the shaking of the filter screen, the vibration assembly includes a fixed ring fixedly arranged inside the overflow hole, an elastic ring slidably connected inside the overflow hole at a position above the fixed ring, and springs arranged on the fixed ring and distributed in an annular array. The filter screen is fixedly arranged inside the elastic ring, and the two ends of the spring are respectively fixedly connected to the top end of the fixed ring and the bottom end of the elastic ring; through the combined design of the fixed ring, the elastic ring and the spring, when the ball squeezes the elastic bladder, the spring will be compressed. When the ball stops squeezing, the elastic recovery of the spring will push the elastic ring, thereby driving the filter screen to shake. This automatic shaking can reduce the adhesion of impurities on the filter screen and keep it clean and unobstructed.

[0015] Through the extrusion and suction mechanism of the negative-pressure lubrication assembly, when the ball contacts the negative-pressure lubrication assembly, the negative-pressure lubrication assembly is squeezed and releases the lubricating oil in the oil storage assembly for lubrication. When the ball is not in contact, the negative-pressure lubrication assembly generates negative pressure to suck in excess lubricating oil. This adjustment method ensures that the flow rate of the lubricating oil can be automatically adjusted according to the contact state of the ball, reducing waste;

[0016] This self-lubricating heavy-duty bearing is equipped with a filter screen to filter the lubricating oil entering the negative pressure lubrication component, preventing impurities from entering and affecting the performance and lifespan of the negative pressure lubrication component. This helps maintain the cleanliness and lubrication effect inside the bearing.

[0017] This self-lubricating heavy-duty bearing is equipped with a vibration component that can cause the filter screen to shake after the ball comes into contact with the negative pressure lubrication component, thereby reducing the adhesion of impurities on the filter screen. This helps keep the filter screen clean and unobstructed, ensuring its performance and extending its lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of a self-lubricating heavy-duty bearing;

[0019] Figure 2 FIG. is an exploded view of a self-lubricating heavy-duty bearing;

[0020] Figure 3 FIG. is a schematic structural diagram of the inner ring in a self-lubricating heavy-duty bearing;

[0021] Figure 4 FIG. is a sectional view of the inner ring in a self-lubricating heavy-duty bearing;

[0022] Figure 5 FIG. is a schematic structural diagram of the negative pressure lubrication component in a self-lubricating heavy-duty bearing;

[0023] Figure 6 FIG. is a sectional view of the negative pressure lubrication component in a self-lubricating heavy-duty bearing;

[0024] Figure 7 FIG. is an exploded view of the vibration component in a self-lubricating heavy-duty bearing.

[0025] In the figures:

[0026] 1. Outer ring;

[0027] 2. Inner ring; 21. Oil storage component; 211. Oil storage cavity; 212. Oil outlet hole; 22. Oil filling hole; 23. Sealing plug; 24. Bolt;

[0028] 3. Support frame;

[0029] 4. Ball;

[0030] 5. Negative pressure lubrication component; 51. Elastic capsule; 52. Overflow hole; 53. Corrugation;

[0031] 6. Filter screen;

[0032] 7. Vibration component; 71. Fixed ring; 72. Spring; 73. Elastic ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0034] This embodiment provides a self-lubricating heavy-duty bearing, such as Figures 1 - 7 As shown, the heavy-duty bearing includes an outer ring 1, an inner ring 2 disposed inside the outer ring 1, a support frame 3 disposed between the outer ring 1 and the inner ring 2, balls 4 rotatably disposed on the support frame 3 and distributed in a ring shape for rolling contact with the outer side of the inner ring 2 and the inner side of the outer ring 1, and an oil storage assembly 21 disposed on the inner ring 2; the heavy-duty bearing further includes a negative pressure lubrication assembly 5 disposed outside the inner ring 2 and communicating with the oil storage assembly 21 for rotating with the inner ring 2 to contact the balls 4 to discharge and suck lubricating oil, a filter screen 6 disposed on the negative pressure lubrication assembly 5, and a vibration assembly 7 disposed on the negative pressure lubrication assembly 5 for moving with the negative pressure lubrication assembly 5 to shake the filter screen 6.

[0035] It should be added that sealing rings are fixedly disposed on both sides of the inner ring 2 corresponding to the support frame 3 and the balls 4, and the sealing rings are rotatably connected to the inner side of the outer ring 1; the design of the sealing rings can seal the positions on both sides of the support frame 3 and the balls 4 to ensure that the lubricating oil does not leak from the positions on both sides of the support frame 3 and the balls 4, and improve the lubrication effect.

[0036] During use, the lubricating oil is first stored in the oil storage assembly 21. When the bearing rotates, friction is generated between the balls 4 and the inner ring 2 and the outer ring 1, and lubricating oil is required for lubrication. At this time, the negative pressure lubrication assembly 5 will rotate with the inner ring 2 and indirectly contact the balls 4. When the balls 4 contact the negative pressure lubrication assembly 5, the negative pressure lubrication assembly 5 will be squeezed. At this time, the negative pressure lubrication assembly 5 will discharge the lubricating oil in the oil storage assembly 21. Through the continuous rolling of the balls 4, it can be coated between the balls 4, the outer ring 1 and the inner ring 2 to form a lubricating film. On the contrary, when the balls 4 are separated from the negative pressure lubrication assembly 5 after contact, the negative pressure lubrication assembly 5 will rebound under its elastic action and generate negative pressure, thereby sucking the excess lubricating oil between the outer ring 1 and the inner ring 2 into the oil storage assembly 21 for next use. However, the design of the filter screen 6 on the negative pressure lubrication assembly 5 can prevent impurities from entering the oil storage assembly 21 when the negative pressure lubrication assembly 5 sucks lubricating oil, affecting the use of the lubricating oil in the oil storage assembly 21. Moreover, when the negative pressure lubrication assembly 5 rebounds after being squeezed by the balls 4, it will drive the vibration assembly 7 to move, and then the vibration assembly 7 will cause the filter screen 6 to shake to reduce the adhesion of impurities on the filter screen 6 and keep the filter screen 6 clean and unobstructed.

[0037] Specifically, the oil storage component 21 includes an oil storage cavity 211 formed inside the inner ring 2 and oil outlet holes 212 formed on the outer side of the inner ring 2 and distributed in an annular array. The two ends of the oil outlet holes 212 are respectively communicated with the oil storage cavity 211 and the negative pressure lubrication component 5;

[0038] Before the bearing operates, the lubricating oil is stored in the oil storage cavity 211. When the bearing starts to operate, the inner ring 2 rotates accordingly. Due to the fact that the oil outlet holes 212 are communicated with the oil storage cavity 211 and the negative pressure lubrication component 5, the centrifugal force generated by the rotation of the inner ring 2 will drive the lubricating oil in the oil storage cavity 211 to enter the negative pressure lubrication component 5 through the oil outlet holes 212 for lubrication.

[0039] Among them, for the convenience of using the oil storage component 21, an oil filling hole 22 communicated with the oil storage cavity 211 for adding lubricating oil is formed on one side of the inner ring 2. A sealing plug 23 is inserted at the oil filling hole 22, and a bolt 24 is arranged on the sealing plug 23. The sealing plug 23 is fixedly connected with the inner ring 2 through the bolt 24; the design of the oil filling hole 22 enables users to conveniently add lubricating oil to the oil storage cavity 211 through this hole, simplifies the process of adding lubricating oil, and improves the usability of the oil storage component 21. Users can replenish the lubricating oil without disassembling the entire bearing. By inserting the sealing plug 23 and fixing it with the bolt 24, the oil filling hole 22 can be tightly closed, effectively preventing the lubricating oil from leaking from the oil filling hole 22 during the operation of the bearing. This design ensures that the lubricating oil inside the bearing will not decrease due to leakage, thus maintaining the good lubrication state of the bearing. At the same time, the combined design of the sealing plug 23 and the bolt 24 can also prevent external impurities from entering the bearing through the oil filling hole 22.

[0040] Furthermore, the negative pressure lubrication component 5 includes an elastic capsule body 51 fixedly arranged at the position corresponding to the oil outlet holes 212 on the outer side of the inner ring 2 and communicated with the inside of the oil outlet holes 212 for contacting the balls 4, and an overflow hole 52 formed on the side of the elastic capsule body 51 close to the balls 4. The filter screen 6 is arranged in the overflow hole 52;

[0041] When the bearing is running, the centrifugal force generated by the rotation of the inner ring 2 causes the lubricating oil in the oil storage cavity 211 to be injected into the oil outlet hole 212. At this time, since the oil outlet hole 212 is connected to the elastic capsule 51, the lubricating oil in the oil storage cavity 211 will directly enter the elastic capsule 51 through the centrifugal force of the rotation of the inner ring 2. When the ball 4 contacts the elastic capsule 51, the elastic capsule 51 will be squeezed. Then, the elastic capsule 51 will be compressed and push the lubricating oil out of the overflow hole 52, so that the lubricating oil is coated between the ball 4, the outer ring 1 and the inner ring 2 to form a lubricating film. When the ball 4 gradually rotates away from the elastic capsule 51 and does not contact and squeeze the elastic capsule 51, at this time, due to the deformation and recovery of the elastic capsule 51, a negative pressure effect will be generated in the elastic capsule 51. Then, the excess lubricating oil between the outer ring 1 and the inner ring 2 will be sucked through the overflow hole 52 and continue to be stored in the oil storage cavity 211 for the next ball 4 to squeeze the elastic capsule 51 to discharge for lubrication. Therefore, the frequency of the elastic capsule 51 squeezing out the lubricating oil is related to the speed of the ball 4 rotating and contacting and squeezing the elastic capsule 51, so that when the bearing is running, the flow rate of the lubricating oil can be automatically adjusted, reducing waste.

[0042] In addition, in order to increase the contact area between the elastic capsule 51 and the ball 4, a plurality of corrugations 53 for the ball 4 to contact are fixedly arranged on one side of the elastic capsule 51 corresponding to the overflow hole 52. The plurality of corrugations 53 are located outside the overflow hole 52, and the edge of the corrugation 53 is in an arc structure; the design of the plurality of corrugations 53 can increase the contact area with the ball 4, so that under the same pressure, the ball 4 can more effectively squeeze the elastic capsule 51, thereby squeezing out more lubricating oil to provide sufficient lubrication for the ball 4. The design of the arc structure at the edge of the corrugation 53 can achieve a smooth transition, reduce the friction and interference with the ball 4, and help ensure the smooth rolling of the ball 4 inside the bearing and ensure the operating efficiency of the bearing.

[0043] Furthermore, the vibration assembly 7 includes a fixing ring 71 fixedly arranged inside the overflow hole 52, an elastic ring 73 slidably connected inside the overflow hole 52 at a position above the fixing ring 71, and springs 72 arranged on the fixing ring 71 and distributed in an annular array. The filter screen 6 is fixedly arranged inside the elastic ring 73, and both ends of the spring 72 are fixedly connected to the top end of the fixing ring 71 and the bottom end of the elastic ring 73 respectively;

[0044] When the bearing is running, due to the extrusion of the ball 4, the elastic capsule 51 is compressed, and when the lubricating oil is discharged from the overflow hole 52 and coated on the ball 4, the spring 72 will be squeezed into a compressed state at the same time. When the ball 4 rotates away from the elastic capsule 51 and does not squeeze the elastic capsule 51, when the elastic capsule 51 recovers its deformation under the elastic action, the elastic force of the spring 72 is released, and it will push the elastic ring 73 to slide upward, thereby driving the filter screen 6 to shake. Therefore, the shaking of the filter screen 6 can reduce the adhesion of impurities on its surface, keeping the filter screen 6 clean and unobstructed. Moreover, with the continuous operation of the bearing, the ball 4 will continuously squeeze and release the elastic capsule 51. During this process, the spring 72 will be continuously compressed and released, thereby driving the filter screen 6 to shake in a cyclic manner. This cyclic shaking can continuously clean the filter screen 6, ensuring the cleanliness of the lubricating oil and the lubrication effect of the bearing.

[0045] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its concept of the present application, makes equivalent replacements or changes, and should be covered within the protection scope of the present application.

Claims

1. A self-lubricating heavy-load bearing, comprising an outer ring (1), an inner ring (2) arranged inside the outer ring (1), a support frame (3) arranged between the outer ring (1) and the inner ring (2), balls (4) rotatably arranged on the support frame (3) and distributed in an annular shape for rolling contact with the outer side of the inner ring (2) and the inner side of the outer ring (1), and an oil storage assembly (21) arranged on the inner ring (2); Features: The heavy-load bearing further comprises a negative pressure lubrication component (5) arranged on the outer side of the inner ring (2) and connected to the oil storage component (21) for contacting the ball (4) with the rotation of the inner ring (2) to discharge and inhale lubricating oil, a filter (6) arranged on the negative pressure lubrication component (5), and a vibration component (7) arranged on the negative pressure lubrication component (5) for causing the filter (6) to shake with the movement of the negative pressure lubrication component (5).

2. The self-lubricating heavy-load bearing according to claim 1, characterized in that: The oil storage assembly (21) comprises an oil storage cavity (211) provided in the inner ring (2) and oil outlet holes (212) provided on the outer side of the inner ring (2) and distributed in a ring array, wherein two ends of the oil outlet holes (212) are respectively connected to the oil storage cavity (211) and the negative pressure lubrication assembly (5).

3. The self-lubricating heavy-load bearing according to claim 2, characterized in that: One side of the inner ring (2) is provided with a refueling hole (22) which is in communication with the oil storage cavity (211) and is used for adding lubricating oil.

4. The self-lubricating heavy-load bearing according to claim 3, characterized in that: A sealing plug (23) is inserted into the refueling hole (22), a bolt (24) is provided on the sealing plug (23), and the sealing plug (23) is fixedly connected to the inner ring (2) via the bolt (24).

5. The self-lubricating heavy-load bearing according to claim 2, characterized in that: The negative pressure lubrication component (5) comprises an elastic sac (51) fixedly arranged on the outer side of the inner ring (2) at a position corresponding to the oil outlet hole (212) and connected to the inside of the oil outlet hole (212) for contacting the ball (4), and an overflow hole (52) opened on a side of the elastic sac (51) close to the ball (4), and the filter (6) is arranged in the overflow hole (52).

6. The self-lubricating heavy-load bearing according to claim 5, characterized in that: A plurality of wavy patterns (53) for the rolling ball (4) to contact are fixedly provided on one side of the elastic bag (51) corresponding to the overflow hole (52), and the plurality of wavy patterns (53) are located outside the overflow hole (52).

7. The self-lubricating heavy-load bearing according to claim 6, characterized in that: The edge of the wave pattern (53) is in an arc-shaped structure.

8. The self-lubricating heavy-load bearing according to claim 5, characterized in that: The vibration assembly (7) comprises a fixing ring (71) fixedly arranged inside the overflow hole (52), an elastic ring (73) slidably connected to a position above the fixing ring (71) in the overflow hole (52), and springs (72) arranged on the fixing ring (71) and distributed in a ring array, the filter screen (6) being fixedly arranged inside the elastic ring (73), and two ends of the spring (72) being fixedly connected to the top end of the fixing ring (71) and the bottom end of the elastic ring (73), respectively.

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