A high-precision micro bearing with good corrosion resistance and dustproof function

Abstract

The utility model belongs to the technical field of micro bearing, disclose a kind of high-precision micro bearing with good corrosion resistance and with dustproof function, including bearing outer ring, bearing inner ring, ball and retainer, ball is confined in the rolling cavity between bearing outer ring and bearing inner ring, retainer is equipped with two groups, two groups of retainer are mutually connected and symmetrically arranged, ball is located between two groups of retainers, bearing outer ring is connected with dust cover, dust cover is connected with labyrinth ring and convex ring one, labyrinth ring and convex ring one staggered arrangement, bearing inner ring is provided with recess, bearing inner ring is connected with convex ring two, convex ring two and recess staggered arrangement, convex ring two and convex ring one staggered arrangement, bearing outer ring is connected with oiling mechanism, and oiling mechanism is used to add lubricating oil.The utility model has multilayer labyrinth type sealing structure, prolongs the penetration path of dust and water vapor, realizes the efficient barrier to micron grade particles under the premise of not increasing friction loss.

Description

Technical Field

[0001] This utility model relates to the field of micro bearing technology, and in particular to a high-precision micro bearing with good corrosion resistance and dustproof function. Background Technology

[0002] Miniature bearings, as indispensable key components in the field of precision machinery, play a vital role in various small devices and instruments. With the advancement of technology and the trend of miniaturization, the application scope of miniature bearings is constantly expanding, covering multiple fields such as medical devices, aerospace, precision instruments, and micro motors. Modern miniature bearings have made significant progress in manufacturing processes, material selection, and precision control, and can meet various high-precision, high-speed, and low-noise application requirements.

[0003] A search of Chinese utility model patents (publication number CN222880152U) reveals a miniature bearing comprising a housing, a cover, raceways, balls, a fixing frame, a through groove, a sponge strip, a slide bar, and a rubber ring. This design allows for the addition of lubricating oil without opening the cover, which is convenient and reduces the entry of dust and impurities into the bearing, thus extending its service life.

[0004] However, practical application has revealed that this technical solution still has at least the following drawbacks: The miniature bearing only relies on the cover for dust protection, which is insufficient to provide adequate protection. It not only fails to isolate dust but may also allow moisture and corrosive media to penetrate, accelerating the corrosion and wear of components such as balls and raceways, and greatly shortening the bearing's service life. Utility Model Content

[0005] The present invention aims to provide a high-precision miniature bearing with good corrosion resistance and dustproof function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A high-precision miniature bearing with good corrosion resistance and dustproof function includes an outer ring, an inner ring, balls, and a cage. The balls are confined within a rolling cavity between the outer and inner rings. Two sets of cages are connected and symmetrically arranged. The balls are located between the two sets of cages. A dust cover is connected to the outer ring, and the dust cover is connected to a labyrinth ring and a first convex ring, which are staggered. A groove is formed in the inner ring, and a second convex ring is connected to it. The second convex ring is staggered with the groove and with the first convex ring. A lubrication mechanism is connected to the outer ring for adding lubricating oil.

[0007] Preferably, the labyrinth ring microstructure is honeycomb-shaped.

[0008] Preferably, the two sets of cages are connected by rivets.

[0009] Preferably, the refueling mechanism includes a rubber ring, a movable rod connected to the rubber ring, a sliding hole on the outer ring of the bearing, the movable rod being slidably connected to the sliding hole, and a sponge head connected to the movable rod, the sponge head cooperating with a ball bearing.

[0010] Preferably, a sealing ring is connected to the inner wall of the sliding hole, and the sealing ring abuts against the moving rod.

[0011] Preferably, a spring is sleeved on the outside of the moving rod, and the two ends of the spring are respectively connected to a rubber ring and the outer ring of the bearing.

[0012] Preferably, the rubber ring has a cross-shaped cutting edge, and the moving rod has an oil injection needle hole, which is aligned with the cross-shaped cutting edge.

[0013] Preferably, the outer ring, inner ring, balls, and cage of the bearing are all made of corrosion-resistant materials.

[0014] The beneficial effects of this technical solution compared to existing technologies are as follows: (1) This technical solution sets up a multi-layered labyrinth seal structure by setting up staggered labyrinth rings, convex ring one and convex ring two, and grooves. This greatly extends the penetration path of dust and water vapor. When dust, water vapor and other pollutants attempt to invade the bearing, they need to travel along the S-shaped tortuous channel formed by the staggered labyrinth rings and convex rings. During this process, particles will be deposited due to inertial collision with the channel wall, and water vapor will be condensed and attached to the gaps between convex ring one, convex ring two, labyrinth ring and groove. It can achieve efficient blocking of micron-sized particles without increasing friction loss. It is especially suitable for keeping the bearing clean in highly polluted environments such as mines and chemical plants, ensuring that the precision fit between the balls and raceways is not affected by impurities, and extending the maintenance cycle of the bearing.

[0015] (2) By setting up a maze ring with a honeycomb-shaped microstructure, the honeycomb-shaped hexagonal pore array can form a more complex airflow channel in a limited space. When dust enters with the airflow, it will be repeatedly refracted and deposited in the porous structure. The dust capture efficiency is improved by using the geometric interception principle. While maintaining the lightweight of the bearing, it resists dust intrusion with a natural physical mechanism. (3) By setting up a rubber ring, sliding hole, moving rod, and sponge head, the lubrication process can be easily controlled without disassembling the bearing components. In addition, the sponge head is soft and has strong water absorption, which can not only accurately apply the lubricating oil to the surface of the ball and the contact parts between the ball and the inner and outer rings of the bearing to achieve efficient lubrication, but also avoid excessive dripping of lubricating oil and waste. At the same time, the cushioning effect of the sponge head will not damage the precision ball structure, thereby ensuring the long-term stable operation of the miniature bearing and effectively extending its service life.

[0016] (4) By setting a sealing ring, it can fit tightly against the surface of the moving rod, preventing external dust, water vapor, corrosive gases and other pollutants from entering the bearing through the sliding hole, thus avoiding wear or corrosion of key components such as balls and raceways. At the same time, the sealing ring can also prevent lubricating oil from leaking from the sliding hole, ensuring that the sponge head in the lubrication mechanism can continuously obtain sufficient lubricating oil and maintain good lubrication of the bearing.

[0017] (5) By setting a spring, the moving rod can automatically return to its original position after lubricating oil is added, ensuring that the sponge head and the ball are separated in time, avoiding continuous contact and generating additional frictional wear, and protecting the surface precision of the ball.

[0018] (6) By setting a cross-shaped cutting edge and an oil injection needle hole, the oil injection needle can be easily inserted without damaging the overall structure of the rubber ring. This ensures the convenience of oil injection and allows the needle to automatically close after oil injection due to the elasticity of the rubber, preventing dust, moisture, and other impurities from entering the bearing through the oil injection port. The precise alignment of the oil injection needle hole with the cross-shaped cutting edge ensures that the lubricating oil can reach the sponge head directly through the needle hole, achieving precise quantitative injection and avoiding lubricating oil waste and overflow. Lubrication can be completed without disassembling any bearing components, while maintaining a good sealing condition of the bearing, effectively extending its service life and meeting the dual requirements of convenient maintenance and stable performance for high-precision miniature bearings.

[0019] (7) By setting the bearing outer ring, bearing inner ring, balls and cage made of corrosion-resistant materials, the environmental adaptability and durability of the bearing are improved, the material aging and performance degradation rate are slowed down, and the bearing can maintain geometric accuracy and mechanical strength under harsh working conditions, reducing the frequency of failures caused by corrosion. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 A schematic diagram of the ball and cage structure provided by this utility model; Figure 3 This is a front sectional view of the present invention; Figure 4 for Figure 3 Enlarged view of point A; Figure 5A schematic diagram of the microstructure of the labyrinth ring provided by this utility model; Figure 6 for Figure 3 Enlarged view of point B; Figure reference numerals: 1. Bearing outer ring; 2. Dust cover; 3. Bearing inner ring; 4. Moving rod; 5. Spring; 6. Rubber ring; 7. Cross blade; 8. Ball; 9. Cage; 10. Sliding hole; 11. Oil injection pin hole; 12. Sponge head; 13. Labyrinth ring; 14. Convex ring one; 15. Convex ring two; 16. Groove; 17. Sealing ring. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figure 1-6 The high-precision miniature bearing shown has good corrosion resistance and dustproof function, including an outer ring 1, an inner ring 3, balls 8, and a cage 9. All three components are made of corrosion-resistant material. The balls 8 are confined within the rolling cavity between the outer ring 1 and the inner ring 3. Two sets of cages 9 are connected to each other by rivets and are symmetrically arranged vertically. The balls 8 are located between the two sets of cages 9. Dust covers 2 are connected to the top and bottom of the outer ring 1. Several sets of labyrinth rings 13 and several sets of raised rings 14 are connected to the sidewalls of the dust covers 2. The labyrinth rings 13 have a honeycomb-like microstructure, and the labyrinth rings 13 and raised rings 14 are arranged alternately. Several sets of grooves 16 are formed on the outer sidewall of the inner ring 3, and several sets of raised rings 15 are connected to the outer sidewall of the inner ring 3. The raised rings 15 and grooves 16 are arranged alternately. The second convex ring 15 and the first convex ring 14 are staggered, and both are made of rubber. When dust, moisture, or other impurities attempt to enter, they must collide and deposit multiple times in the tortuous channel. Simultaneously, the airflow forms vortices within the channel, generating a reverse thrust to expel the impurities. The honeycomb labyrinth ring 13, through its unique porous array structure, further increases the complexity of the airflow, causing dust particles to continuously collide and deposit within the channel. The gaps formed by the staggered convex rings and grooves 16, combined with the elastic deformation capability of the rubber material, effectively block pollutants.

[0022] like Figure 1 , Figure 3 and Figure 6As shown, the outer ring 1 of the bearing is connected to a lubrication mechanism, which includes a rubber ring 6. Several sets of movable rods 4 arranged in a circular array are connected to the inner wall of the rubber ring 6. The outer ring 1 of the bearing has several sets of sliding holes 10, and the movable rods 4 are slidably connected to the sliding holes 10. A sponge head 12 is connected to one end of the movable rod 4 inside the sliding hole 10, and the sponge head 12 mates with the ball bearing 8. Several sets of sealing rings 17 are connected to the inner wall of the sliding hole 10, and the sealing rings 17 abut against the movable rod 4. A spring 5 is sleeved on the outer side of the movable rod 4, and both ends of the spring 5 are connected to the rubber ring 6 and the outer ring 1 of the bearing, respectively. The rubber ring 6 has several sets of cross-shaped cutting edges 7, and an oil injection needle hole 11 is located at the center of the movable rod 4, aligned with the cross-shaped cutting edges 7. Under normal conditions, the preload provided by the spring 5 causes the rubber ring 6 to separate the sponge head 12 on the movable rod 4 from the ball bearing 8. When lubricating oil needs to be added, the lubricating oil passes through the injection needle through the cross-shaped cutting edge 7 of the rubber ring 6, and flows into the sponge head 12 through the injection needle hole 11 of the moving rod 4. After the sponge head 12 absorbs the lubricating oil, it pushes the moving rod 4 to overcome the elastic force of the spring 5 and approach the ball bearing 8. Utilizing the strong water absorption and permeability of the sponge, the lubricating oil is evenly applied to the surface of the ball bearing 8, achieving precise lubrication. At the same time, the sealing ring 17 on the inner wall of the sliding hole 10 is in close contact with the moving rod 4, and the cross-shaped cutting edge 7 of the rubber ring 6 automatically rebounds and closes after oil injection.

[0023] The specific implementation process is as follows: In use, insert the grease injection needle into the cross-shaped notch 7 of the rubber ring 6. Due to the elasticity of the cross-shaped notch 7, the needle can be inserted smoothly without damaging the sealing structure of the rubber ring 6. Lubricating oil flows into the sponge head 12 through the injection needle hole 11, and the sponge head 12 quickly absorbs the lubricating oil. After the lubricating oil is injected, remove the injection needle, and the cross-shaped notch 7 of the rubber ring 6 automatically closes. Press the rubber ring 6 inward, thereby pushing the moving rod 4 to compress the spring 5, so that the sponge head 12 contacts the ball bearing 8. During the bearing rotation, the sponge head 12 evenly spreads the lubricating oil onto the ball bearing 8, completing the lubrication operation. Release the rubber ring 6, and the elastic restoring force of the spring 5 causes the moving rod 4 to separate the sponge head 12 from the ball bearing 8, returning to the initial state, ready for the next lubrication.

[0024] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-precision miniature bearing with good corrosion resistance and dustproof function, characterized in that: The bearing includes an outer ring (1), an inner ring (3), balls (8), and a cage (9). The balls (8) are confined within the rolling cavity between the outer ring (1) and the inner ring (3). There are two sets of cages (9), which are connected to each other and arranged symmetrically. The balls (8) are located between the two sets of cages (9). The outer ring (1) is connected to a dust cover (2), which is connected to a labyrinth ring (13) and a first convex ring (14). The labyrinth ring (13) and the first convex ring (14) are staggered. The inner ring (3) has a groove (16), which is connected to a second convex ring (15). The second convex ring (15) and the groove (16) are staggered, and the second convex ring (15) and the first convex ring (14) are staggered. The outer ring (1) is connected to a lubrication mechanism for adding lubricating oil.

2. The high-precision miniature bearing with good corrosion resistance and dustproof function as described in claim 1, characterized in that: The labyrinth ring (13) has a honeycomb-like microstructure.

3. The high-precision miniature bearing with good corrosion resistance and dustproof function as described in claim 2, characterized in that: The two sets of cages (9) are connected by rivets.

4. A high-precision miniature bearing with good corrosion resistance and dustproof function as described in claim 1, characterized in that: The refueling mechanism includes a rubber ring (6), the rubber ring (6) is connected to a moving rod (4), the outer ring (1) of the bearing has a sliding hole (10), the moving rod (4) is slidably connected to the sliding hole (10), the moving rod (4) is connected to a sponge head (12), and the sponge head (12) cooperates with the ball (8).

5. A high-precision miniature bearing with good corrosion resistance and dustproof function as described in claim 4, characterized in that: A sealing ring (17) is connected to the inner wall of the sliding hole (10), and the sealing ring (17) abuts against the moving rod (4).

6. A high-precision miniature bearing with good corrosion resistance and dustproof function as described in claim 5, characterized in that: A spring (5) is sleeved on the outside of the moving rod (4), and the two ends of the spring (5) are connected to the rubber ring (6) and the outer ring of the bearing (1) respectively.

7. A high-precision miniature bearing with good corrosion resistance and dustproof function as described in claim 6, characterized in that: The rubber ring (6) has a cross-shaped cutting edge (7), and the moving rod (4) has an oil injection needle hole (11), which is aligned with the cross-shaped cutting edge (7).

8. A high-precision miniature bearing with good corrosion resistance and dustproof function as described in claim 1, characterized in that: The outer ring (1), inner ring (3), balls (8), and cage (9) of the bearing are all made of corrosion-resistant materials.

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