Self-aligning roller bearing capable of preventing dust from invading

Abstract

The invention provides a self-aligning roller bearing capable of preventing dust from invading, and relates to the technical field of bearings, the self-aligning roller bearing comprises a bearing inner ring and a bearing outer ring, inner ring spiral connecting rings are fixedly connected to the inner edges of the two end faces of the bearing inner ring, and outer ring spiral connecting rings are fixedly connected to the outer edges of the two end faces of the bearing outer ring; the two end faces of the bearing outer ring are each fixedly connected with a return iron sheet. The sealing check ring is vibrated, dust attached to the outer surface of the sealing check ring is vibrated to fall off, and therefore the function of rapidly cleaning the sealing ring is achieved, cleaning of the sealing ring is completed under the condition that the bearing and the sealing ring do not need to be detached, dust accumulation on the surface of the sealing ring is avoided, and the problem that external dust adheres to the surface of the rubber sealing ring, and the service life of the sealing ring is prolonged is solved. And if the sealing ring is cleaned, the sealing ring needs to be completely disassembled, the operation is tedious, scratches are easily generated on the outer surface of the sealing ring or the bearing along with the increase of the disassembly times, and the damage of the sealing ring is accelerated.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to a self-aligning roller bearing that prevents dust intrusion. Background Technology

[0002] Self-aligning roller bearings are heavy-duty bearings that automatically compensate for misalignment between the shaft and the bearing housing. Their core design features a spherical outer ring raceway and a double-row drum-shaped inner ring. This unique structure allows the bearing to withstand large radial and bidirectional axial loads during operation. When the shaft bends due to load or installation errors, the rollers automatically adjust their position to maintain contact with the outer ring raceway. Therefore, this type of bearing allows for a 1.5°-3° deflection angle between the inner and outer rings, avoiding edge stress concentration and significantly extending its lifespan. They are used in heavy industrial applications such as mining machinery, large gearboxes, and vibrating screens, where shaft deformation or base settlement is likely. However, in environments with high dust and impurities, dust intrusion can exacerbate wear on the rollers and raceways, leading to lubrication failure, increased noise, and even seizure. Traditional self-aligning roller bearings use contact rubber seals to prevent dust from entering the rolling elements and causing them to roll. These seals are installed at the gap between the inner and outer rings, reducing the chance of dust entering and rolling.

[0003] In traditional self-aligning roller bearings, as the bearing is used for a longer period of time, external dust will adhere to the surface of the rubber seal. If lubricant seeps out, the dust will mix with the lubricant and condense, making the dust adhere more firmly. The continuous accumulation of dust will increase the friction between the seal and the bearing ring, and may even gradually enter the raceway, affecting the smoothness of the bearing's rotation. Cleaning the seal requires complete disassembly, which is cumbersome. Furthermore, with repeated disassembly, scratches may appear on the seal or the outer surface of the bearing, accelerating the damage to the seal. Summary of the Invention

[0004] This invention provides a self-aligning roller bearing that prevents dust intrusion, solving the problem that in traditional self-aligning roller bearings, as the bearing is used for a longer period, external dust adheres to the surface of the rubber seal. If lubricant seeps out, the dust mixes with the lubricant and condenses, making the dust adhere more firmly. The continuous accumulation of dust increases the friction between the seal and the bearing ring, and may even gradually enter the raceway, affecting the smoothness of the bearing's rotation. Cleaning the seal requires complete disassembly, which is cumbersome and, with repeated disassembly, can easily cause scratches on the seal or the outer surface of the bearing, accelerating the damage to the seal.

[0005] This invention provides a self-aligning roller bearing that prevents dust intrusion, specifically comprising: an inner bearing ring and an outer bearing ring. An inner ring helical coupling is fixedly connected to the inner edges of both end faces of the inner bearing ring. An outer ring helical coupling is fixedly connected to the outer edges of both end faces of the outer bearing ring. A return plate is fixedly connected to each end face of the outer bearing ring. A circular outer helical coupling sleeve is helically connected inside the outer ring helical coupling sleeve. An outer end sleeve is slidably connected inside the outer helical coupling sleeve. The inner side of the outer end sleeve facing the center has an arc-shaped structure. The sealing arc surface has a reset magnetic block fixedly connected to the outer end sleeve, which is magnetically connected to the return iron plate. The edge of the inner sealing arc surface matches the edge of the inner arc surface of the outer ring of the bearing. The inner ring spiral ring is spirally connected to a circular inner spiral sleeve. The inner spiral sleeve is slidably connected to an inner pull end sleeve. The inner surface of the inner pull end sleeve has a retaining ring installation port. A sealing retaining ring is installed inside the end sleeve pull plate. The inner edge of the sealing retaining ring is bent to form a square ring structure. A retaining ring locking ring is sleeved inside the square ring.

[0006] Furthermore, the outer edge of the outer rotating sleeve is bent inward to form an outer limiting flange, and the outer limiting flange has an outer rotating insertion hole through it.

[0007] Furthermore, an elongated anti-rotation groove is provided on the inner wall of the outer rotating sleeve, and the anti-rotation groove is parallel to the axis of the outer rotating sleeve.

[0008] Furthermore, the outer surface of the outer end sleeve is provided with a strip-shaped anti-spinning groove, which is parallel to the axis of the outer end sleeve and is slidably connected to the anti-spinning groove.

[0009] Furthermore, the outer edge of the inner rotating sleeve is bent outward to form an inner limiting flange, and an inner rotating insertion hole is formed through the inner limiting flange.

[0010] Furthermore, the outer surface of the inner rotating sleeve is provided with a strip-shaped inner anti-rotation groove, which is parallel to the axis of the inner rotating sleeve.

[0011] Furthermore, the outer surface of the inner pull end sleeve is provided with a strip-shaped anti-spinning groove, which is parallel to the axis of the inner pull end sleeve and is slidably connected inside the anti-spinning groove.

[0012] Furthermore, an end sleeve pull plate is provided outside the inner pull end sleeve, and a pull plate insertion hole with a circular hole structure is provided through the end sleeve pull plate.

[0013] Furthermore, the outer edge of the sealing ring is provided with a "V" shaped bending structure, and the outer edge of the sealing ring fits into the inner sealing arc surface.

[0014] This invention provides a self-aligning roller bearing that prevents dust intrusion, which has the following beneficial effects: In this invention, a sealing ring is installed between the inner and outer rings of the self-aligning roller bearing through a small auxiliary component. The sealing ring shields the rolling elements and raceways inside the bearing, which reduces the likelihood of dust from outside the bearing directly entering the bearing and affecting the fitting accuracy between the rolling elements and raceways, thus reducing the smoothness of bearing rotation.

[0015] Furthermore, in this invention, the inner edge of the sealing ring is installed in the inner pull end sleeve, and the outer edge of the sealing ring contacts the outer end sleeve. Under normal conditions, the outer end sleeve is locked by the magnetic attraction between the reset magnet and the return iron plate, while limiting the sealing ring and the inner pull end sleeve, so that the positional relationship between the inner pull end sleeve, the sealing ring, and the inner ring of the bearing remains unchanged. As the bearing is used for a longer period of time, when dust adheres to the outer surface of the sealing ring, a hook is inserted into the pull plate hole to pull it away from the bearing center, causing the sealing ring to move outward. At the same time, the outer edge of the sealing ring pushes the outer end sleeve outward, causing the reset magnet and the return iron plate to separate. When the pull plate hole is released, the outer end sleeve is quickly reset under the magnetic attraction between the reset magnet and the return iron plate, and the sealing ring and the inner pull end sleeve are quickly pushed back to their original positions. During this process, the sealing ring vibrates, causing the dust attached to the outer surface of the sealing ring to fall off, thereby achieving the function of quickly cleaning the sealing ring. The sealing ring is cleaned without disassembling the bearing and the sealing ring, avoiding the accumulation of dust on the surface of the sealing ring from affecting the operation of the bearing.

[0016] Furthermore, the bearing seal ring in this invention has a detachable structure. The outer screw-in sleeve is fixed to the outer ring of the bearing through the helical connection of the inner thread of the outer ring helical connector. Similarly, the inner screw-in sleeve is fixed to the inner ring of the bearing through the helical connection of the outer thread of the inner ring helical connector. When the bearing is installed, the outer screw-in sleeve, the inner screw-in sleeve, and other connected parts can be disassembled in advance to avoid damage to the sealing structure due to compression during bearing assembly. When performing deep cleaning of the sealing structure, auxiliary tools such as hooks can be used to insert into the outer screw-in and inner screw-in holes to rotate and disassemble the sleeves, and the internal parts of the sleeves can be disassembled and cleaned separately. Compared with the bearing seal ring of the traditional structure, the improved sealing structure will not cause wear to the seal ring and the bearing surface during disassembly. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2This paper shows a schematic diagram of the bearing structure when radially cut open. Figure 3 A schematic diagram of the structure in the separated state of this application is shown; Figure 4 This application shows Figure 2 A schematic diagram of the left-side view structure; Figure 5 This paper shows a schematic diagram of the structure of the sealing structure in the state where it is separated from the bearing. Figure 6 This diagram shows a schematic representation of the structure of the present application in its separated sealed state. Figure 7 This diagram shows the structure of the external end sleeve of this application when it is separated from the outer ring of the bearing; Figure 8 This paper shows a schematic diagram of the structure of the external rotating sleeve and the external end sleeve in an exploded state. Figure 9 This paper shows a schematic diagram of the internal screw sleeve and internal pull end sleeve in their disassembled state. Figure 10 This application shows Figure 2 A magnified structural diagram of point A in the middle; Figure 11 This application shows Figure 7 A magnified structural diagram of a portion of point B in the middle.

[0020] Figure label: 1. Bearing inner ring; 101. Inner ring spiral connector; 2. Bearing outer ring; 201. Outer ring spiral connector; 202. Return iron plate; 3. Outer rotating sleeve; 301. Outer limiting flange; 302. Outer rotating adjustment hole; 303. Outer anti-rotation groove; 4. Outer end sleeve; 401. Inner sealing arc surface; 402. Reset magnetic block; 403. Outer anti-rotation groove; 5. Inner rotating sleeve; 501. Inner limiting flange; 502. Inner rotating adjustment hole; 503. Inner anti-rotation groove; 6. Inner pull end sleeve; 601. Retaining ring mounting port; 602. End sleeve pull plate; 603. Pull plate insertion hole; 604. Inner anti-rotation groove; 7. Sealing retaining ring; 8. Retaining ring locking ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 11 : This invention proposes a self-aligning roller bearing that prevents dust intrusion, comprising: an inner ring 1 and an outer ring 2. Inner ring spiral rings 101 are fixedly connected to the inner edges of both end faces of the inner ring 1. Outer ring spiral rings 201 are fixedly connected to the outer edges of both end faces of the outer ring 2. A return iron piece 202 is fixedly connected to each end face of the outer ring 2. A circular outer spiral sleeve 3 is spirally connected inside the outer ring spiral ring 201. An outer end sleeve 4 is slidably connected inside the outer spiral sleeve 3. The side of the outer end sleeve 4 facing the center is an arc-shaped inner sealing arc surface 401. A reset magnetic block 402 is fixedly connected to the outer end sleeve 4. The reset magnetic block 402 is magnetically connected to the return iron piece 202. The edge of the inner sealing arc surface 401 matches the edge of the inner arc surface of the outer ring 2. 1. An inner spiral sleeve 5 with a circular structure is internally spirally connected. An inner pull end sleeve 6 is slidably connected inside the inner spiral sleeve 5. A retaining ring installation port 601 is opened on the inner surface of the inner pull end sleeve 6. A sealing retaining ring 7 is installed inside the end sleeve pull plate 602. The inner edge of the sealing retaining ring 7 is bent and processed into a square ring structure. A retaining ring locking ring 8 is sleeved inside the square ring. Under normal conditions, the outer end sleeve 4 is locked by the magnetic attraction connection between the reset magnetic block 402 and the return iron plate 202. At the same time, the sealing retaining ring 7 and the inner pull end sleeve 6 are limited, so that the positional relationship between the inner pull end sleeve 6, the sealing retaining ring 7 and the bearing inner ring 1 remains unchanged. When the bearing rotates, the outer edge of the sealing retaining ring 7 contacts the inner sealing arc surface 401 to seal the rolling elements and raceways inside the bearing, preventing external dust from entering the rolling elements or raceways and affecting the smoothness of the bearing.

[0023] In this embodiment, the outer edge of the outer rotating sleeve 3 is bent inward to form an outer limiting flange 301. The outer limiting flange 301 has an outer rotating insertion hole 302. The outer rotating sleeve 3 is fixed to the outer ring 2 of the bearing by the spiral connection of the inner thread of the outer ring spiral ring 201. When disassembling the outer rotating sleeve 3, a tool with a hook-shaped end is inserted into the outer rotating insertion hole 302 and the outer rotating sleeve 3 is rotated to remove the outer rotating sleeve 3 from the inner ring spiral ring 201, so as to remove the outer rotating sleeve 3 and the outer end sleeve 4 for deep cleaning.

[0024] In this embodiment, an elongated anti-rotation groove 303 is provided on the inner wall of the outer rotating sleeve 3. The anti-rotation groove 303 is parallel to the axis of the outer rotating sleeve 3. An anti-rotation pattern 403 with a strip structure is raised on the outer surface of the outer end sleeve 4. The anti-rotation pattern 403 is parallel to the axis of the outer end sleeve 4. The anti-rotation pattern 403 is slidably connected to the anti-rotation groove 303, which plays a guiding role. Through the inner sealing arc surface 401 with a spherical structure, the sealing ring 7 is always in contact with the inner sealing arc surface 401 as the angle between the outer ring 2 and the inner ring 1 of the bearing shifts, so as to avoid the sealing failure after the angle shifts. The outer end sleeve 4 is slidably connected inside the outer rotating sleeve 3. It can move outward synchronously with the outer end sleeve 4 as the sealing ring 7 moves outward. At the same time, the sealing ring 7 is limited by the magnetic attraction between the reset magnetic block 402 and the return iron piece 202.

[0025] In this embodiment, the outer edge of the inner rotating sleeve 5 is bent outward to form an inner limiting flange 501. An inner rotating adjustment hole 502 is provided through the inner limiting flange 501. The inner rotating sleeve 5 is fixed to the inner ring 1 of the bearing by the spiral connection of the outer thread of the inner ring spiral ring 101. When disassembling the inner rotating sleeve 5, a tool with a hook-shaped end is inserted into the inner rotating adjustment hole 502 and the inner rotating adjustment hole 502 is rotated to remove the inner rotating sleeve 5 from the inner ring spiral ring 101, so that the inner rotating sleeve 5, the inner pull end sleeve 6, the sealing retaining ring 7 and other parts can be disassembled and deeply cleaned.

[0026] In Example 2, based on Example 1, the outer surface of the inner rotating sleeve 5 is provided with a strip-shaped inner anti-rotation groove 503, which is parallel to the axis of the inner rotating sleeve 5. The outer surface of the inner pull end sleeve 6 is provided with a strip-shaped inner anti-rotation pattern 604, which is parallel to the axis of the inner pull end sleeve 6. The inner anti-rotation pattern 604 is slidably connected inside the inner anti-rotation groove 503, serving a guiding function. An end sleeve pull plate 602 is provided outside the inner pull end sleeve 6, and a pull plate insertion hole 603 with a circular hole structure is provided through the end sleeve pull plate 602. The outer edge of the sealing ring 7 is provided with a "V" shaped bending structure, and the outer edge of the sealing ring 7 fits the inner sealing arc surface 401. As the bearing is used for a longer period of time, dust adheres to the outside of the sealing ring 7. When the bearing is moved away from the bearing center, a hook is inserted into the pull plate insertion hole 603 and pulled away from the bearing center. This causes the sealing ring 7 to move outward. At the same time, the outer edge of the sealing ring 7 pushes the outer end sleeve 4 outward, causing the reset magnet 402 to separate from the return iron piece 202. When the pull plate insertion hole 603 is released, the outer end sleeve 4 is quickly reset due to the magnetic attraction between the reset magnet 402 and the return iron piece 202. At the same time, the sealing ring 7 and the inner pull end sleeve 6 are quickly pushed back to their original positions. During this process, the sealing ring 7 vibrates, causing the dust attached to the outer surface of the sealing ring 7 to fall off. This achieves the function of quickly cleaning the sealing ring. The sealing ring is cleaned without disassembling the bearing and the sealing ring, avoiding the accumulation of dust on the surface of the sealing ring that may affect the operation of the bearing.

[0027] The working principle of this embodiment is as follows: First, before assembling the shaft and its components, it is necessary to disassemble the outer screw-fitting sleeve 3, the inner screw-fitting sleeve 5, and the other connected components in advance to avoid damage to the sealing structure due to compression during bearing assembly. During operation, a tool with a hook-shaped end is inserted into the outer screw-fitting hole 302 and rotated to remove the outer screw-fitting sleeve 3 from the outer ring spiral ring 201. Then, a tool with a hook-shaped end is inserted into the inner screw-fitting hole 502 and rotated to remove the inner screw-fitting sleeve 5 from the inner ring spiral ring 101. At the same time, the outer end sleeve 4 and the inner pull end sleeve 6 are removed. After the bearing assembly is completed, the outer screw-fitting sleeve 3, the inner screw-fitting sleeve 5, the outer end sleeve 4, and the inner pull end sleeve 6 are reassembled onto the bearing end face. As the bearing is used for a longer period of time, when dust adheres to the outer sealing ring 7, a hook is inserted into the pull plate insertion hole 603 to pull it away from the bearing center. Pulling the seal ring 7 causes it to move outward, and at the same time, the outer edge of the seal ring 7 pushes the outer end sleeve 4 outward, causing the reset magnet 402 to separate from the return iron piece 202. When the pull plate insertion hole 603 is released, the outer end sleeve 4 is quickly reset due to the magnetic attraction between the reset magnet 402 and the return iron piece 202. At the same time, the seal ring 7 and the inner pull end sleeve 6 are quickly pushed back to their original positions. During this process, the seal ring 7 vibrates, causing the dust attached to the outer surface of the seal ring 7 to fall off, thereby achieving the function of quickly cleaning the seal ring. Simple cleaning can be performed without disassembling the sealing structure. During the cleaning process, an air gun can be used to help blow off the dust. If the bearing sealing structure requires further deep cleaning, the outer screw sleeve 3 and the inner screw sleeve 5 can be disassembled again, and the inner outer end sleeve 4, the inner pull end sleeve 6 and the seal ring 7 can be removed. These small parts can be cleaned with special cleaning tools to complete the quick cleaning of the bearing dust sealing structure.

[0028] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0029] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0030] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A self-aligning roller bearing that prevents dust ingress, comprising: The bearing inner ring (1) and bearing outer ring (2) are characterized in that an inner ring spiral connecting ring (101) is fixedly connected to the inner edge of both ends of the bearing inner ring (1), and an outer ring spiral connecting ring (201) is fixedly connected to the outer edge of both ends of the bearing outer ring (2). A return iron piece (202) is fixedly connected to each end of the bearing outer ring (2). A circular outer spiral connecting sleeve (3) is spirally connected inside the outer ring spiral connecting ring (201). An outer connecting end sleeve (4) is slidably connected inside the outer spiral connecting sleeve (3). The side of the outer connecting end sleeve (4) facing the center is an arc-shaped inner sealing arc surface (401). A reset magnetic block (402) is fixedly connected, and the reset magnetic block (402) is magnetically connected to the return iron piece (202). The edge of the inner sealing arc surface (401) matches the edge of the inner arc surface of the bearing outer ring (2). The inner ring spiral connecting ring (101) is spirally connected to an inner spiral connecting sleeve (5) with a circular structure. The inner spiral connecting sleeve (5) is slidably connected to an inner pull end sleeve (6). The inner surface of the inner pull end sleeve (6) is provided with a retaining ring installation port (601). A sealing retaining ring (7) is installed inside the end sleeve pull plate (602). The inner edge of the sealing retaining ring (7) is bent and processed into a square ring structure. A retaining ring locking ring (8) is sleeved inside the square ring.

2. The self-aligning roller bearing with dust-proof capability according to claim 1, characterized in that, The outer edge of the outer rotating sleeve (3) is bent inward to form an outer limiting flange (301), and the outer limiting flange (301) is provided with an outer rotating insertion hole (302).

3. A self-aligning roller bearing capable of preventing dust intrusion according to claim 1, characterized in that, The inner wall of the outer rotating sleeve (3) is provided with a long strip-shaped outer anti-rotation groove (303), which is parallel to the axis of the outer rotating sleeve (3).

4. A self-aligning roller bearing capable of preventing dust intrusion according to claim 3, characterized in that, The outer surface of the outer end sleeve (4) is provided with a strip-shaped anti-spinning texture (403), which is parallel to the axis of the outer end sleeve (4). The anti-spinning texture (403) is slidably connected to the anti-spinning groove (303).

5. A self-aligning roller bearing capable of preventing dust intrusion according to claim 1, characterized in that, The outer edge of the inner rotating sleeve (5) is bent outward to provide an inner limiting flange (501), and an inner rotating insertion hole (502) is provided through the inner limiting flange (501).

6. A self-aligning roller bearing capable of preventing dust intrusion according to claim 1, characterized in that, The outer surface of the inner rotating sleeve (5) is provided with a strip-shaped inner anti-rotation groove (503), which is parallel to the axis of the inner rotating sleeve (5).

7. A self-aligning roller bearing with dust-proof capability according to claim 6, characterized in that, The outer surface of the inner pull end sleeve (6) is provided with a strip-shaped inner anti-spinning groove (604). The inner anti-spinning groove (604) is parallel to the axis of the inner pull end sleeve (6) and is slidably connected inside the inner anti-spinning groove (503).

8. A self-aligning roller bearing capable of preventing dust intrusion according to claim 1, characterized in that, The inner pull end sleeve (6) is provided with an end sleeve pull plate (602) outside, and a pull plate insertion hole (603) with a circular hole structure is provided through the end sleeve pull plate (602).

9. A self-aligning roller bearing capable of preventing dust intrusion according to claim 1, characterized in that, The outer edge of the sealing ring (7) is provided with a "V" shaped bending structure, and the outer edge of the sealing ring (7) fits the inner sealing arc surface (401).

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