Bearing with stable lubricating performance

Abstract

The bearing comprises an outer ring, an inner ring, a roller, a retaining ring and a dustproof cover, a containing cavity, a first oil storage cavity, a first oil injection hole and a first oil outlet channel are formed in the inner ring, a bimetallic strip is arranged on the inner ring and comprises a first metal sheet and a second metal sheet, a sliding block is further arranged on the inner ring, and the first metal sheet and the second metal sheet are connected through the sliding block. A through hole is formed in the sliding block, an elastic piece is further arranged on the inner ring, a second oil storage cavity, a second oil injection hole and a second oil outlet channel are formed in the outer ring, and a sealing cover is connected into the second oil injection hole in a threaded mode. When the temperature of the bearing rises, the bimetallic strip deforms due to the difference of thermal expansion coefficients between the first metal sheet and the second metal sheet, the sliding block is pushed to move, the through hole is communicated with the first oil outlet channel, the second lubricating oil flows out and is mixed with the first lubricating oil on the surface of the roller in continuous friction, and therefore the lubricating oil with the viscosity more suitable for the bearing at the temperature is obtained. And the overall lubricating effect of the bearing tends to be stable in any working period.

Description

Technical Field

[0001] The present application relates to the field of bearings, and in particular to a bearing with stable lubrication performance. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support mechanical rotating bodies and reduce the mechanical load friction coefficient of the equipment during the transmission process.

[0003] For example, the utility model patent with patent announcement number CN221323081U discloses a bearing, including a bearing assembly and an oil supply assembly, the bearing assembly includes an outer ring, an inner ring, a rolling cylinder, a retaining ring and a dust cover, the inner ring, the rolling cylinder and the retaining ring are all arranged inside the outer ring, the rolling cylinder is arranged between the outer ring and the inner ring, the retaining ring is fixed to the surface of the rolling cylinder, the dust cover is arranged between the outer ring and the inner ring, the oil supply assembly is arranged in the inner cavity of the outer ring, and includes a sealing ring, a fastening nut, an oil storage box, an oil filling hole, a sealing cover, an oil outlet hole and a connecting hole, and the sealing ring is arranged on the surface of the outer ring.

[0004] If the viscosity of the lubricating oil used is too high, the mechanical equipment will not be fully lubricated. If the viscosity of the lubricating oil used is too low, the adhesion will be poor and the specific parts cannot be lubricated and protected. Therefore, the lubricating oil used on the bearings is viscosity-adapted, but the viscosity of the lubricating oil will decrease with the increase of temperature. When using the above-mentioned bearings, the temperature of the bearings will rise after working for a long time, resulting in a decrease in the viscosity of the lubricating oil stored in the bearings, a decrease in the lubrication effect on the bearings, and aggravated bearing wear, which needs to be improved. Summary of the invention

[0005] In order to improve the problem of decreased lubrication effect of bearings after long-term operation, the present application provides a bearing with stable lubrication performance.

[0006] The present application provides a bearing with stable lubrication performance, which adopts the following technical solution: A bearing with stable lubrication performance comprises an outer ring, an inner ring, a roller, a retaining ring and a dust cover, wherein the inner ring is provided with a receiving cavity, an oil storage cavity 1, an oil injection hole 1 and an oil outlet channel 1, the oil storage cavity 1 is used to store lubricating oil 1, the oil storage cavity 1 is connected with the oil injection hole 1 and the oil outlet channel 1, and the oil outlet channel 1 is located on a side of the oil storage cavity 1 close to the roller, the inner ring is provided with a bimetallic sheet, the bimetallic sheet is located in the receiving cavity, the bimetallic sheet comprises a bonded metal sheet 1 and a metal sheet 2, the metal sheet 1 is located on a side of the metal sheet 2 away from the oil storage cavity 1, and the thermal expansion coefficient of the metal sheet 1 is greater than the thermal expansion coefficient of the metal sheet 2; The inner ring is also slidably connected with a slider, the slider is located on the side of the metal sheet 2 away from the metal sheet 1 and penetrates the oil outlet channel 1, the slider slides close to or away from the metal sheet 2, a through hole is opened on the slider, the through hole is used to connect with the oil outlet channel 1, the inner ring is also provided with an elastic member, the elastic member presses against the slider, so that the slider has a tendency to approach the metal sheet 2, and the through hole is located on the side of the oil outlet channel 1 close to the metal sheet 2; The outer ring is provided with an oil storage chamber 2, an oil injection hole 2 and an oil outlet channel 2. The oil storage chamber 2 is used to store lubricating oil 2. The viscosity of the lubricating oil 2 is lower than that of the lubricating oil 1. The oil storage chamber 2 is connected with the oil injection hole 2 and the oil outlet channel 2. The oil injection hole 2 is internally threaded with a sealing cover.

[0007] By adopting the above technical solution, when the bearing works at a normal temperature, the lubricating oil in the oil storage chamber 2 flows out through the oil outlet channel 2 to lubricate the roller. When the temperature of the bearing rises after working for a long time, the metal sheet 1 and the metal sheet 2 expand due to the heat. Since the thermal expansion coefficient of the metal sheet 1 is greater than the thermal expansion coefficient of the metal sheet 2, the deformation of the metal sheet 1 is greater than the deformation of the metal sheet 2, causing the bimetallic sheet to gradually bend toward the slider as a whole. The bimetallic sheet pushes the slider to move away from the metal sheet 2, so that the through hole and the oil outlet channel 1 are connected. Under the action of the centrifugal force generated by the rotation of the inner ring, the lubricating oil 1 in the oil storage chamber 1 flows to the oil outlet channel 1, passes through the through hole and then flows out through the oil outlet channel 1 to lubricate the roller. When the bearing is working normally, the viscosity of the lubricating oil 1 is adapted to the lubrication effect required by the bearing. After the bearing temperature rises, the viscosity of the lubricating oil 1 decreases, and the viscosity of the lubricating oil 2 is greater than that of the lubricating oil 1. After the lubricating oil 2 flows out, it mixes with the lubricating oil 1 on the surface of the roller in continuous friction, thereby obtaining a lubricating oil with a viscosity that is more adapted to the bearing at this temperature, so that the overall lubrication effect of the bearing tends to be stable at any working time, which is beneficial to reduce the wear of the bearing and extend the service life of the bearing.

[0008] Optionally, the inner ring includes a coaxially arranged ring body one and a ring body two, the ring body two is provided with an annular groove for the ring body one to be inserted into, the inner wall of the annular groove is provided with an arc-shaped protrusion, the inner ring wall of the ring body one is provided with a positioning groove for the arc-shaped protrusion to be inserted into, the accommodating cavity and the oil filling hole one are both formed by splicing the ring body one and the ring body two, the bimetallic strip is provided on the ring body one, and the oil storage cavity one, the oil outlet channel one, the elastic member and the slider are all provided on the ring body two.

[0009] By adopting the above technical solution, an installation space for the bimetallic strip is reserved on the ring body one. After the bimetallic strip is installed on the ring body one, the ring body one is inserted into the ring groove and the arc-shaped protrusion is inserted into the positioning groove. The positioning between the ring body one and the ring body two is achieved by the arc-shaped protrusion abutting against the inner wall of the positioning groove, making the bearing assembly more convenient.

[0010] Optionally, the ring body 1 includes a main body and an adjusting ring coaxially rotating on the main body, the accommodating cavity and the oil filling hole 1 are both formed by splicing the main body and the ring body 2, the adjusting ring is located on a side of the main body away from the ring body 2, the adjusting ring is provided with a notch, the notch is used to connect the oil filling hole 1, the adjusting ring is provided with a movable hole and a sink groove, the sink groove and the movable hole are connected, a positioning rod is threadedly connected to the main body, the positioning rod is slidably connected to the movable hole along the rotation direction of the adjusting ring, a positioning block is provided on the positioning rod, the sink groove is for the positioning block to be inserted into, and when the positioning block is inserted into the sink groove, the adjusting ring covers the oil filling hole 1.

[0011] By adopting the above technical scheme, the viscosity of lubricating oil 1 is greater than that of lubricating oil 2, which makes lubricating oil 1 more likely to adhere to dust and other debris. When the lubricating oil 1 in the oil storage chamber 1 is insufficient, the positioning rod is twisted to make the positioning block disengage from the positioning groove, and then the adjusting ring is rotated to make the gap and the oil filling hole 1 connected. At this time, oil can be filled into the oil filling hole 1. After the oil filling is completed, the adjusting ring is twisted in the opposite direction so that the adjusting ring covers the oil filling hole 1 and the positioning block is aligned with the sink. At this time, the adjusting ring can scrape off the debris adhered to the surface of the main body and around the oil filling hole 1, reducing the situation where the oil is contaminated by the debris around the oil filling hole 1 during subsequent oil filling. Then the positioning rod is twisted to make the positioning block stuck in the sink. The adjusting ring can be positioned by the positioning block abutting against the inner wall of the sink. The oil filling hole 1 and the oil filling hole 2 can also be distinguished to reduce the situation of oil filling confusion.

[0012] Optionally, the bimetallic strip is in a "T" shape, a slot is provided on the first ring body, a mounting groove for the bimetallic strip to be inserted into is provided on the inner wall of the slot, and an abutment block is provided on the second ring body, and the slot is for the abutment block to be inserted into.

[0013] By adopting the above technical solution, the bimetallic strip has a higher damage rate than the bearing due to frequent deformation. When the bimetallic strip is damaged to the point of being unable to function, a tool can be used to reach between ring body one and ring body two, and ring body one can be removed from ring body two. The damaged bimetallic strip can then be taken out for replacement, and ring body one can be reinserted into the ring groove, and the arc-shaped protrusion can be inserted into the positioning groove and the abutment block can be inserted into the slot. The bimetallic strip can be positioned in the installation groove by abutting the bimetallic strip with the abutment block, and the installation of ring body one on ring body two can be completed. The replaced bimetallic strip can continue to maintain the stability of the bearing's lubrication performance, which is beneficial to further extend the service life of the bearing.

[0014] Optionally, a groove is formed on the second metal sheet, and the groove is located on a side of the slider close to the first ring body.

[0015] By adopting the above technical solution, the portion of the metal sheet 2 where the groove is provided has a small thickness and low strength. When the bimetallic strip is deformed due to the difference in thermal expansion coefficients between the metal sheet 1 and the metal sheet 2, the portion of the metal sheet 2 where the groove is provided begins to bend, which helps the bimetallic strip to push the slider to move.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the temperature of the bearing rises after working for a long time, the bimetallic strip is deformed due to the difference in thermal expansion coefficient between the metal strip 1 and the metal strip 2, pushing the slider to move, so that the through hole and the oil outlet channel 1 are connected, and the lubricating oil 2 flows out and mixes with the lubricating oil 1 on the roller surface in continuous friction, thereby obtaining a lubricating oil with a viscosity more suitable for the bearing at this temperature, so that the overall lubrication effect of the bearing tends to be stable at any working period, which is beneficial to reduce the wear of the bearing and extend the service life of the bearing; 2. By setting the ring body 1 and the ring body 2, a space for installing the bimetallic strip is reserved on the ring body 1. After the bimetallic strip is installed on the ring body 1, the ring body 1 is inserted into the ring groove and the arc-shaped protrusion is inserted into the positioning groove. The positioning between the ring body 1 and the ring body 2 is achieved by the arc-shaped protrusion abutting against the inner wall of the positioning groove, making the bearing assembly more convenient; 3. When the lubricating oil in the oil storage chamber is insufficient, rotate the adjusting ring to connect the gap with the oil filling hole, and then fill the oil into the oil filling hole. After the oil filling is completed, reversely twist the adjusting ring so that the adjusting ring covers the oil filling hole. At this time, the adjusting ring can scrape off the debris adhered to the surface of the main body and around the oil filling hole, thereby reducing the situation where the oil is contaminated by the debris around the oil filling hole during subsequent oil filling. It can also be used to distinguish between the oil filling hole and the oil filling hole to reduce the confusion of oil filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of an embodiment of the present application.

[0018] Figure 2 This is a cross-sectional view of an embodiment of the present application, mainly showing the structure of the second oil storage chamber, the second oil filling hole and the second oil outlet channel.

[0019] Figure 3 for Figure 2 The enlarged view of part A in the middle mainly shows the structure of the oil storage chamber 1, the oil outlet channel 1, the slider and the elastic part.

[0020] Figure 4 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the arc-shaped protrusion and the abutment block.

[0021] Figure 5 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the positioning groove and the sinking groove.

[0022] Figure 6 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the card slot and the installation slot.

[0023] Figure 7 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the groove.

[0024] Explanation of reference numerals: 1, outer ring; 11, oil storage chamber 2; 12, oil filling hole 2; 13, oil outlet channel 2; 2, inner ring; 21, ring body 1; 211, main body; 2111, positioning groove; 2112, clamping groove; 2113, mounting groove; 212, adjustment ring; 2121, notch; 2122, movable hole; 2123, sink groove; 22, ring body 2; 221, ring groove; 222, oil storage Cavity 1; 223, oil outlet channel 1; 224, slide groove; 3, roller; 4, retaining ring; 5, dust cover; 6, arc-shaped protrusion; 7, accommodating cavity; 8, oil filling hole 1; 9, positioning rod; 10, positioning block; 14, bimetallic sheet; 141, metal sheet 1; 142, metal sheet 2; 1421, groove; 15, abutment block; 16, slider; 161, through hole; 17, elastic member; 18, sealing cover. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-7 This application is described in further detail.

[0026] The present application embodiment discloses a bearing with stable lubrication performance. Figure 1-2 A bearing with stable lubrication performance comprises an outer ring 1, an inner ring 2, a plurality of rollers 3, a retaining ring 4 and two dust covers 5. The inner ring 2 is located in the area surrounded by the outer ring 1. The plurality of rollers 3 are located between the outer ring 1 and the inner ring 2 and are evenly spaced along the outer circumference of the inner ring 2. The retaining ring 4 is located between the outer ring 1 and the inner ring 2 and is fixed on the surfaces of the plurality of rollers 3. The two dust covers 5 are installed between the outer ring 1 and the inner ring 2, and the two dust covers 5 are respectively located on both sides of the roller 3.

[0027] See also Figure 1-6The outer ring 1, the inner ring 2 and the two dust covers 5 are spliced ​​to form a cavity. The inner ring 2 includes a ring body 1 21 and a ring body 22. The ring body 1 21 and the ring body 22 are distributed along the axial direction of the inner ring 2. The ring body 1 21 includes a main body 211 and an adjusting ring 212. An annular groove 221 is provided on the outer side wall of the ring body 22. The annular groove 221 is located at one end of the ring body 22 along the axial direction, and the main body 211 is inserted into the annular groove 221. When the main body 21 1 is inserted into the annular groove 221, the axes of the main body 211 and the second ring body 22 coincide, and the two dust covers 5 are respectively installed on the main body 211 and the second ring body 22. A plurality of arc-shaped protrusions 6 are fixed on the inner wall of the annular groove 221 at uniform intervals in the circumferential direction. Positioning grooves 2111 are provided on the inner ring wall of the main body 211. The number and positions of the positioning grooves 2111 correspond to the number and positions of the arc-shaped protrusions 6 one by one, and the positioning grooves 2111 are for the arc-shaped protrusions 6 to be inserted.

[0028] See also Figure 1-6 The main body 211 and the second ring body 22 are spliced ​​to form a receiving cavity 7 and an oil injection hole 1 8. The adjusting ring 212 is located on the side of the main body 211 away from the second ring body 22 and coaxially rotates on the main body 211. A notch 2121 is provided on the adjusting ring 212. The notch 2121 is located on the side of the oil injection hole 1 8 along the rotation direction of the adjusting ring 212. The notch 2121 is used to connect the oil injection hole 1 8. A movable hole 2122 is provided on the outer wall of the adjusting ring 212 away from the main body 211. And a sink groove 2123, the sink groove 2123 is located at one end of the movable hole 2122 and is connected to the movable hole 2122, a positioning rod 9 is threadedly connected to the main body 211, the positioning rod 9 is slidably connected to the movable hole 2122 along the rotation direction of the adjusting ring 212, a positioning block 10 is fixed to the end of the positioning rod 9 away from the main body 211, the sink groove 2123 is for the positioning block 10 to be inserted, when the positioning block 10 is inserted into the sink groove 2123, the adjusting ring 212 covers the oil filling hole 8.

[0029] See also Figure 1-6 An oil storage chamber 222 and an oil outlet channel 223 are provided on the ring body 22. The oil storage chamber 222 is used to store lubricating oil. The oil storage chamber 222 is connected to the oil filling hole 8. The oil outlet channel 223 is located on the side of the oil storage chamber 222 close to the roller 3 and is connected to the oil storage chamber 222. The end of the oil outlet channel 223 away from the oil storage chamber 222 is connected to the cavity.

[0030] See also Figure 1-7A bimetallic strip 14 is provided on the main body 211, and the bimetallic strip 14 is in a "T" shape. The bimetallic strip 14 is located in the accommodating chamber 7. The bimetallic strip 14 includes a bonded metal sheet 141 and a metal sheet 142. The metal sheet 141 is located on the side of the metal sheet 142 away from the oil storage chamber 1 222, and the thermal expansion coefficient of the metal sheet 141 is greater than the thermal expansion coefficient of the metal sheet 142. A groove 1421 is provided on the outer wall of the metal sheet 142 away from the metal sheet 1 141. A card slot 2112 is provided on the outer wall of the main body 211, and the card slot 2112 is connected to the accommodating chamber 7. A mounting groove 2113 is provided on the inner wall of the card slot 2112 for the upper end of the bimetallic strip 14 to be inserted into. A contact block 15 is fixed on the ring body 22, and the card slot 2112 is provided for the contact block 15 to be inserted into.

[0031] See also Figure 1-7 The ring body 22 is provided with a slide groove 224, which is located on the side of the metal sheet 142 away from the metal sheet 141 and on the side of the groove 1421 away from the main body 211. The slide groove 224 is connected to the accommodating chamber 7. The ring body 22 is slidably connected with a slider 16, which is slidably connected in the slide groove 224, and the slider 16 slides close to or away from the metal sheet 142. The slider 16 penetrates the oil outlet channel 1 223, and the outer wall of the slider 16 is provided with a through hole 161, which penetrates the slider along the axial direction of the ring body 22. Block 16, through hole 161 is used to connect to oil outlet channel 1 223, and an elastic member 17 is also fixed on ring body 22, the elastic member 17 is located in the slide groove 224 and between the slider 16 and the bottom of the slide groove 224, the opposite ends of the elastic member 17 are respectively fixedly connected to the slider 16 and the inner wall of the bottom of the slide groove 224, the elastic member 17 presses against the slider 16, so that the slider 16 has a tendency to approach the metal sheet 2 142, and the through hole 161 is located on the side of the oil outlet channel 1 223 close to the metal sheet 2 142, in this embodiment, the elastic member 17 is a spring.

[0032] See also Figure 1-2 An oil storage chamber 11, an oil injection hole 12 and an oil outlet channel 13 are provided in the outer ring 1. The oil storage chamber 11 is used to store lubricating oil 2. The viscosity of lubricating oil 2 is lower than that of lubricating oil 1. The oil storage chamber 11 is connected with the oil injection hole 12 and the oil outlet channel 13. The oil injection hole 12 is located on the side of the oil storage chamber 11 away from the roller 3 and passes through the outer ring 1 in the direction away from the oil storage chamber 11. A sealing cover 18 is connected to the inner thread of the oil injection hole 12. The oil outlet channel 13 is located on the side of the oil storage chamber 11 close to the roller 3 and is connected to the cavity.

[0033] The implementation principle of a bearing with stable lubrication performance in the embodiment of the present application is as follows: When the bearing works at normal temperature, the lubricating oil in the oil storage chamber 11 flows out through the oil outlet channel 13 to lubricate the roller 3. When the temperature of the bearing rises after working for a long time, the metal sheet 141 and the metal sheet 142 expand due to the heat. Since the thermal expansion coefficient of the metal sheet 141 is greater than that of the metal sheet 142, the deformation of the metal sheet 141 is greater than that of the metal sheet 142, causing the bimetallic strip 14 to gradually bend toward the slider 16 as a whole. The bimetallic strip 14 pushes the slider 16 to move away from the metal sheet 142, so that the through hole 161 is connected to the oil outlet channel 123. Under the action of the centrifugal force generated by the rotation of the inner ring 2, the lubricating oil 1 in the oil storage chamber 222 flows to the oil outlet channel 223, passes through the through hole 161 and then flows out through the oil outlet channel 223 to lubricate the roller 3. When the bearing is working normally, the viscosity of the lubricating oil 1 is adapted to the lubrication effect required by the bearing. After the bearing temperature rises, the viscosity of the lubricating oil 1 decreases, and the viscosity of the lubricating oil 2 is greater than the viscosity of the lubricating oil 1. After the lubricating oil 2 flows out, it mixes with the lubricating oil 1 on the surface of the roller 3 in continuous friction, thereby obtaining a lubricating oil with a viscosity that is more adapted to the bearing at this temperature, so that the overall lubrication effect of the bearing tends to be stable at any working period, which is beneficial to reduce the wear of the bearing and extend the service life of the bearing.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bearing with stable lubrication performance, comprising an outer ring (1), an inner ring (2), a roller (3), a retaining ring (4) and a dust cover (5), characterized in that: The inner ring (2) is provided with a receiving cavity (7), an oil storage cavity (222), an oil injection hole (8) and an oil outlet channel (223). The oil storage cavity (222) is used to store lubricating oil. The oil storage cavity (222) is connected to the oil injection hole (8) and the oil outlet channel (223). The oil outlet channel (223) is located on a side of the oil storage cavity (222) close to the roller (3). The inner ring (2) is provided with a bimetallic strip (14). The bimetallic strip (14) is located in the receiving cavity (7). The bimetallic strip (14) includes a bonded metal sheet (141) and a metal sheet (142). The metal sheet (141) is located on a side of the metal sheet (142) away from the oil storage cavity (222). The thermal expansion coefficient of the metal sheet (141) is greater than the thermal expansion coefficient of the metal sheet (142). The inner ring (2) is also slidably connected with a slider (16), the slider (16) is located on the side of the metal sheet (142) away from the metal sheet (141) and penetrates the oil outlet channel (223), the slider (16) slides close to or away from the metal sheet (142), a through hole (161) is opened on the slider (16), the through hole (161) is used to connect with the oil outlet channel (223), the inner ring (2) is also provided with an elastic member (17), the elastic member (17) presses against the slider (16), so that the slider (16) has a tendency to approach the metal sheet (142), and the through hole (161) is located on the side of the oil outlet channel (223) close to the metal sheet (142); The outer ring (1) is provided with an oil storage chamber (11), an oil injection hole (12) and an oil outlet channel (13). The oil storage chamber (11) is used to store lubricating oil (2). The viscosity of the lubricating oil (2) is lower than that of the lubricating oil (1). The oil storage chamber (11) is connected to the oil injection hole (12) and the oil outlet channel (13). The oil injection hole (12) is internally threadedly connected to a sealing cover (18).

2. The bearing with stable lubrication performance according to claim 1, characterized in that: The inner ring (2) comprises a coaxially arranged ring body 1 (21) and a ring body 2 (22); the ring body 2 (22) is provided with an annular groove (221) for the ring body 1 (21) to be inserted into; the inner wall of the annular groove (221) is provided with an arc-shaped protrusion (6); the inner ring wall of the ring body 1 (21) is provided with a positioning groove (2111) for the arc-shaped protrusion (6) to be inserted into; the accommodating cavity (7) and the oil filling hole 1 (8) are both formed by splicing the ring body 1 (21) and the ring body 2 (22); the bimetallic strip (14) is provided on the ring body 1 (21); the oil storage cavity 1 (222), the oil outlet channel 1 (223), the elastic member (17) and the slider (16) are all provided on the ring body 2 (22).

3. The bearing with stable lubrication performance according to claim 2, characterized in that: The ring body (21) comprises a main body (211) and an adjusting ring (212) coaxially rotating on the main body (211); the accommodating cavity (7) and the oil injection hole (8) are both formed by splicing the main body (211) and the ring body (22); the adjusting ring (212) is located on a side of the main body (211) away from the ring body (22); a notch (2121) is provided on the adjusting ring (212); the notch (2121) is used to communicate with the oil injection hole (8); and a movable hole (2121) is provided on the adjusting ring (212). 122) and a sink groove (2123), the sink groove (2123) and the movable hole (2122) are communicated, a positioning rod (9) is threadedly connected to the main body (211), the positioning rod (9) is slidably connected to the movable hole (2122) along the rotation direction of the adjusting ring (212), a positioning block (10) is provided on the positioning rod (9), the sink groove (2123) is for the positioning block (10) to be inserted, and when the positioning block (10) is inserted into the sink groove (2123), the adjusting ring (212) covers the oil filling hole (8).

4. The bearing with stable lubrication performance according to claim 2, characterized in that: The bimetallic strip (14) is in a "T" shape, a slot (2112) is provided on the first ring body (21), a mounting slot (2113) is provided on the inner wall of the slot (2112) for the bimetallic strip (14) to be inserted into, and a contact block (15) is provided on the second ring body (22), and the slot (2112) is provided for the contact block (15) to be inserted into.

5. The bearing with stable lubrication performance according to claim 2, characterized in that: The second metal sheet (142) is provided with a groove (1421), and the groove (1421) is located on a side of the slider (16) close to the first ring body (21).

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