A self-aligning roller bearing

Abstract

This utility model discloses a self-aligning roller bearing, belonging to the field of bearing technology. It includes an inner bearing ring, an outer bearing ring sleeved outside the inner bearing ring, a cage located between the inner and outer bearing rings, and rollers rotatably mounted on the cage. It also includes dustproof and oil-filling structures installed on opposite sides of the outer bearing ring. Each dustproof and oil-filling structure includes a dustproof ring and an elastic seal. The outer side of the dustproof ring is fixedly connected to the outer bearing ring, and the inner side of the elastic seal is sandwiched between the end of the inner bearing ring and the inner side of the dustproof ring. An oil filling port is provided on the dustproof ring, and the free side of the elastic seal fits against the dustproof ring and seals the oil filling port. This self-aligning roller bearing allows for oil filling via an oil filling pipe inserted through the oil filling port. When the oil filling pipe is removed after oil filling, the elastic seal automatically resets and re-seals the oil filling port, making operation simpler and more efficient.

Description

Technical Field

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

[0002] Self-aligning roller bearings are double-row rolling bearings with self-aligning function. Their outer ring adopts a spherical raceway design, and the inner ring is equipped with two rows of inclined raceways, which can compensate for the angular deviation between the shaft and the bearing housing within 0.5°. They are widely used in large mechanical equipment and can be used in various harsh working conditions, such as high-speed operation, strong vibration and high temperature.

[0003] To ensure smooth rolling of the rollers inside a self-aligning roller bearing, a good seal is required, necessitating the periodic injection of lubricating oil. There are two main traditional methods of lubrication: one is through the oil inlet on the outer ring, and the other is through the end of the bearing. These methods depend primarily on the bearing's structure. For example, in bearings using the first lubrication method, the outer ring has an oil inlet communicating with the space formed by the inner and outer rings. After lubrication, the inlet is sealed with a plug before the outer ring is installed in the bearing housing. In bearings using the second lubrication method, cover plates are installed at opposite ends to prevent dust and lubricating oil leakage. During lubrication, the cover plates are removed from the bearing side to expose the rollers before lubrication. After lubrication, the cover plates are then reinstalled on the bearing side. Obviously, for the two oiling methods mentioned above, either the entire bearing needs to be removed from the bearing housing, or the side cover needs to be removed, making the oiling process inconvenient and not conducive to efficient oiling.

[0004] Therefore, it is necessary for the inventors to improve the structure of the self-aligning roller bearing to ensure sealing and dust prevention while also facilitating oil injection. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the above-mentioned defects in the prior art, a self-aligning roller bearing that can ensure sealing and dust prevention and is also easy to lubricate is provided.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a self-aligning roller bearing, including an inner bearing ring, an outer bearing ring sleeved outside the inner bearing ring, a cage disposed between the inner and outer bearing rings, and rollers rotatably disposed on the cage. It also includes a dustproof and oil-filling structure installed on opposite sides of the outer bearing ring. The dustproof and oil-filling structure includes a dustproof ring and an elastic seal. The outer side of the dustproof ring is fixedly connected to the outer bearing ring. The inner side of the elastic seal is sandwiched between the end of the inner bearing ring and the inner side of the dustproof ring. An oil filling port is opened on the dustproof ring. The free side of the elastic seal fits against the dustproof ring and seals the oil filling port.

[0007] Furthermore, the elastic seal includes a fixing part and a sealing part. The sealing part is fixedly connected to the outside of the fixing part and is inclined towards the dustproof ring. The fixing part is clamped between the dustproof ring and the end of the bearing inner ring, and the sealing part seals the oil injection port.

[0008] Furthermore, an annular groove is provided at the inner edge of the dustproof ring, and the fixing part is fixedly installed in the annular groove.

[0009] Furthermore, a first groove is formed by recessing the side wall of the outer ring end of the bearing inward along the axial direction, and a second groove is formed by recessing the side wall of the inner ring end of the bearing inward along the axial direction. The depth of the first groove is less than the depth of the second groove. The dustproof ring is in contact with the bottom wall of the first groove, and the fixing part is pressed by the dustproof ring onto the bottom wall of the second groove.

[0010] Furthermore, a sealing groove is formed on the bottom wall of the first groove, and a sealing ring is installed in the sealing groove, which contacts and seals with the dustproof ring.

[0011] Furthermore, the dustproof ring is fixedly connected to the outer ring of the bearing by bolts. The bolts are located on the side of the sealing ring away from the central axis of the dustproof ring, and there are multiple bolts evenly arranged along the circumference of the dustproof ring.

[0012] Furthermore, both the dustproof ring and the elastic seal are circular ring structures and are coaxially arranged.

[0013] Furthermore, the dust ring is made of stainless steel, and the elastic seal is made of silicone.

[0014] The beneficial effects of this invention are as follows: The self-aligning roller bearing of this invention allows for direct insertion of the oil filling pipe through the oil filling port during oil filling. Furthermore, when the oil filling pipe is removed after oil filling, the elastic seal automatically resets and re-seals the oil filling port. Compared to traditional oil filling methods, this invention is simpler and more efficient to operate. In addition, the dustproof ring conceals the elastic seal internally, greatly reducing the chance of the elastic seal coming into contact with dust and moisture, preventing easy failure of the elastic seal, and ensuring high reliability. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a perspective view of the self-aligning roller bearing of this utility model;

[0017] Figure 2 yes Figure 1 The front view of the self-aligning roller bearing shown;

[0018] Figure 3 yes Figure 2 The self-aligning roller bearing shown is a cross-sectional view along AA.

[0019] Figure 4 yes Figure 3 The image shows a magnified view of point B in the self-aligning roller bearing.

[0020] In the diagram: 1. Bearing outer ring, 10. Mounting cavity, 11. Outer ring raceway, 12. First groove, 121. Sealing groove, 122. Sealing ring, 13. Bolt, 2. Bearing inner ring, 21. Inner ring raceway, 3. Cage, 4. Roller, 5. Dustproof and oil-filling structure, 51. Dustproof ring, 510. Oil filling port, 511. Annular groove, 52. Elastic seal, 521. Fixing part, 522. Sealing part. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] Please see Figures 1-4This utility model provides a self-aligning roller bearing, including an outer ring 1, an inner ring 2, a cage 3, and rollers 4. The outer ring 1 is fitted over the inner ring 2, and the space enclosed by the outer ring 1 and the inner ring 2 forms a mounting cavity 10. The cage 3 is installed inside the mounting cavity 10. Multiple rollers 4 are rotatably mounted on the cage 3. In this embodiment, the inner wall of the outer ring 1 has an outer ring raceway 11, and the outer wall of the inner ring 2 has two inner ring raceways 21. The rollers 4 are arranged in two rows, corresponding to the two inner ring raceways 21. The rollers 4 cooperate with the outer ring raceways 11. In use, the inner ring 2 rotates relative to the outer ring 1, and the rollers 4 roll relative to both the inner and outer ring raceways 21.

[0023] The self-aligning roller bearing of this utility model also includes a dustproof and oil-filling structure 5. Two dustproof and oil-filling structures 5 are installed on opposite sides of the outer ring 1 of the bearing, used to seal the mounting cavity 10. The dustproof and oil-filling structure 5 includes a dustproof ring 51 and an elastic seal 52. The elastic seal 52 is made of an elastic sealing material. The dustproof ring 51 has a circular ring structure and is fixedly installed at the end of the outer ring 1 of the bearing and coaxially arranged with it. Specifically, the outer side of the dustproof ring 51 is fixedly connected to the end of the outer ring 1 of the bearing, and the inner side of the dustproof ring 51 extends to the end of the inner ring 2 of the bearing. The elastic seal 52 has a circular ring structure and is coaxially arranged with the dustproof ring 51. The inner side of the elastic seal 52 is sandwiched between the end of the inner ring 2 of the bearing and the inner side of the dustproof ring 51, and the outer side of the elastic seal 52 is a free side. This specification stipulates that the outer side of the dust ring 51 and the outer side of the elastic seal 52 are the side away from the central axis, while the inner side of the dust ring 51 and the inner side of the elastic seal 52 are the side close to the central axis.

[0024] The outer side of the dust ring 51 is fixedly connected to the outer ring 1 of the bearing, and the inner side of the dust ring 51 presses the inner side of the elastic seal 52 against the end of the inner ring 2 of the bearing. On the one hand, the elastic seal 52 can achieve a good seal between the dust ring 51 and the inner ring 2 of the bearing, and on the other hand, it can also ensure that the inner ring 2 of the bearing can rotate relative to the dust ring 51.

[0025] In this embodiment, the dust ring 51 has an oil inlet 510. The free side of the elastic seal 52 fits against the dust ring 51 and seals the oil inlet 510. In its natural state, the elastic seal 52 remains in its original shape, thus blocking the oil inlet 510 and preventing dust and moisture from entering the mounting cavity 10. When it is necessary to inject lubricating oil into the bearing, a tubular oil injection tube can be inserted into the oil inlet 510. During the insertion of the oil injection tube, it will push against the free side of the elastic seal 52, causing elastic deformation, thereby opening the free side of the elastic seal 52. At this time, the oil injection tube extends into the mounting cavity 10, allowing oil injection to be performed into the mounting cavity 10. After the oil injection is completed, when the oil injection tube is pulled out, the free side of the elastic seal 52 will automatically reset under the action of elasticity, thereby sealing the oil inlet 510 again.

[0026] The above-described oiling process does not require disassembling the entire bearing from the bearing housing or removing the dust ring 51. Oiling can be performed directly by inserting the oiling pipe through the oiling port 510. Furthermore, when the oiling pipe is pulled out after oiling, the elastic seal 52 automatically resets to reseal the oiling port 510. Compared to traditional oiling methods, this invention is simpler and more efficient. Moreover, the dust ring 51 conceals the elastic seal 52 internally, significantly reducing the chance of the elastic seal 52 coming into contact with dust and moisture, preventing easy failure of the elastic seal 52, and ensuring high reliability.

[0027] In one specific embodiment, the elastic seal 52 is an integrally molded structure, including a fixing part 521 and a sealing part 522. The sealing part 522 initially has a dish-shaped cross-section and is fixedly connected to the outside of the fixing part 521. The sealing part 522 is inclined towards the dust ring 51. The fixing part 521 is clamped between the dust ring 51 and the end of the bearing inner ring 2. The sealing part 522 is used to seal the oil inlet 510. When the fixing part 521 is compressed and fixed, the sealing part 522 will deform and fit tightly against the dust ring 51 to ensure that the oil inlet 510 is blocked.

[0028] In this embodiment, an annular groove 511 is provided at the inner edge of the dustproof ring 51, and the fixing part 521 is fixedly installed in the annular groove 511. In one specific embodiment, the dustproof ring 51 and the fixing part 521 can be fixedly connected by adhesive. During assembly, the elastic seal 52 can be fixedly connected to the dustproof ring 51 by the fixing part 521 first, and then the dustproof ring 51 can be fixedly installed on the outer ring 1 of the bearing.

[0029] In this embodiment, a first groove 12 is formed axially inwardly recessed on the sidewall of the outer ring 1 of the bearing, and a second groove 22 is formed axially inwardly recessed on the sidewall of the inner ring 2 of the bearing. Both the first groove 12 and the second groove 22 are circular structures. The depth of the first groove 12 is less than the depth of the second groove 22. The dustproof ring 51 fits against the bottom wall of the first groove 12, and the fixing part 521 is pressed against the bottom wall of the second groove 22 by the dustproof ring 51. During installation, when the dustproof ring 51 is fixedly installed on the bottom wall of the first groove 12, the position of the dustproof ring 51 is fixed. At this time, the deformation range of the fixing part 521 after being pressed by the dustproof ring 51 is also determined. In specific implementation, by reasonably setting the depth of the two grooves, the fixing part 521 can be compressed within a certain reasonable range, ensuring sealing while avoiding failure of the fixing part 521 due to excessive compression.

[0030] Furthermore, a sealing groove 121 is formed on the bottom wall of the first groove 12, and a sealing ring 122 is installed in the sealing groove 121. The sealing ring 122 contacts and seals with the dustproof ring 51. By setting the sealing ring 122, the sealing performance between the dustproof ring 51 and the outer ring 1 of the bearing can be improved, preventing dust and lubricating oil leakage at the same time. The sealing ring 122 is made of silicone or rubber material.

[0031] In this embodiment, the dustproof ring 51 is fixedly connected to the outer ring 1 of the bearing by bolts 13. There are multiple bolts 13 and they are evenly arranged along the circumference of the dustproof ring 51. In addition, the bolts 13 are arranged on the side of the sealing ring 122 away from the central axis of the dustproof ring 51 to prevent the lubricating oil from contacting the bolts 13.

[0032] In this embodiment, the dust ring 51 is made of stainless steel, and the elastic seal 52 is made of silicone.

[0033] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A self-aligning roller bearing, comprising an inner bearing ring, an outer bearing ring sleeved outside the inner bearing ring, a cage disposed between the inner and outer bearing rings, and rollers rotatably disposed on the cage, characterized in that: It also includes a dustproof and oil-filling structure installed on opposite sides of the outer ring of the bearing. The dustproof and oil-filling structure includes a dustproof ring and an elastic seal. The outer side of the dustproof ring is fixedly connected to the outer ring of the bearing. The inner side of the elastic seal is sandwiched between the end of the inner ring of the bearing and the inner side of the dustproof ring. An oil filling port is provided on the dustproof ring. The free side of the elastic seal fits against the dustproof ring and seals the oil filling port.

2. The self-aligning roller bearing as described in claim 1, characterized in that: The elastic seal includes a fixing part and a sealing part. The sealing part is fixedly connected to the outside of the fixing part and is inclined towards the dustproof ring. The fixing part is clamped between the dustproof ring and the end of the bearing inner ring. The sealing part seals the oil injection port.

3. The self-aligning roller bearing as described in claim 2, characterized in that: An annular groove is provided at the inner edge of the dustproof ring, and the fixing part is fixedly installed in the annular groove.

4. The self-aligning roller bearing as described in claim 2, characterized in that: A first groove is formed by an axial inward recess on the side wall of the outer ring end of the bearing, and a second groove is formed by an axial inward recess on the side wall of the inner ring end of the bearing. The depth of the first groove is less than the depth of the second groove. The dustproof ring is in contact with the bottom wall of the first groove, and the fixing part is pressed against the bottom wall of the second groove by the dustproof ring.

5. The self-aligning roller bearing as described in claim 4, characterized in that: A sealing groove is provided on the bottom wall of the first groove, and a sealing ring is installed in the sealing groove. The sealing ring contacts and seals with the dustproof ring.

6. The self-aligning roller bearing as described in claim 5, characterized in that: The dustproof ring is fixedly connected to the outer ring of the bearing by bolts. The bolts are located on the side of the sealing ring away from the central axis of the dustproof ring, and there are multiple bolts evenly arranged along the circumference of the dustproof ring.

7. The self-aligning roller bearing as described in claim 1, characterized in that: Both the dustproof ring and the elastic seal are circular rings and are coaxially arranged.

8. The self-aligning roller bearing as described in claim 1, characterized in that: The dust ring is made of stainless steel, and the elastic seal is made of silicone.

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