Sealed needle bearing

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to a sealed needle bearing. Comprising an outer ring which is provided with an inner ring used for defining a circular hollow inner cavity for accommodating a rotor; the retainer is arranged between the interior of the outer ring and the outer surface of the inner ring; the mounting grooves are uniformly formed in the retainer at intervals in the circumferential direction; the roller pin is arranged in the mounting groove; the sealing structure is positioned between the outer ring and the inner ring; the pre-tightening mechanism is arranged in the outer ring and is matched with the sealing structure; the pre-tightening mechanism comprises gaskets and circular sliding grooves, and the gaskets and the circular sliding grooves are formed in the front side and the rear side in the outer ring. The separation grooves are formed in the upper end and the lower end of the front side and the rear side in the outer ring, extend outwards to penetrate through the end face of the outer ring, and communicate with the circular sliding grooves; the clamping blocks are arranged on the two sides of the outer wall of the sealing structure, the clamping blocks are in sliding connection with the circular sliding grooves, and the clamping blocks are in sliding-out fit with the disengaging grooves. According to the sealing needle bearing, the whole sealing structure can be conveniently detached.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, in particular to a sealed needle roller bearing. Background Art

[0002] Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are thin and long. Such rollers are called needle rollers. Despite their small cross-section, the bearings still have a high load-bearing capacity. Needle roller bearings are equipped with thin and long rollers, so the radial structure is compact. When the inner diameter size and load capacity are the same as those of other types of bearings, the outer diameter is the smallest. They are particularly suitable for bearings with limited radial installation dimensions. For needle roller bearings, it is necessary to ensure the bearing effect of the needle roller bearing itself while better improving the sealing of the needle roller bearing.

[0003] The utility model patent with publication number CN208578875U discloses a sealing structure of a needle roller bearing, which is installed at one axial end of the needle roller bearing; it includes a sealing ring, a retaining ring and a sealing cover, the sealing ring is installed on the end face of the needle roller of the needle roller bearing, the sealing cover is arranged on the end face of the outer ring of the needle roller bearing, the retaining ring is arranged between the sealing ring and the sealing cover, an annular groove is recessed on the inner diameter surface of the outer ring, the annular outer edge of the retaining ring is embedded in the annular groove, the bottom end of the retaining ring is in close contact with the top of the sealing ring, and the bottom end of the inner ring side of the sealing cover is convexly provided with a barb, and the barb hooks the bottom of the annular inner edge of the retaining ring.

[0004] Although this technology tightly connects the sealing cover, the retaining ring and the sealing ring together, making them not easy to separate and ensuring the sealing effect of the sealing structure, this technology is not convenient for disassembling the sealing structure as a whole and has limitations, which makes it inconvenient for users to lubricate the needle rollers. After the needle roller bearings have been moving for a long time, their needle roller surfaces are prone to wear, which affects the normal movement of the needle roller bearings and reduces the service life of the needle rollers. Utility Model Content

[0005] The utility model aims to solve the above-mentioned technical problems and provide a sealed needle roller bearing which is convenient for disassembling the sealing structure as a whole, lubricating the needle roller and extending its service life.

[0006] In view of this, the utility model provides a sealed needle roller bearing, comprising:

[0007] An outer ring having an inner ring for enclosing a circular hollow inner cavity for accommodating the rotor;

[0008] A cage is provided between the inner part of the outer ring and the outer surface of the inner ring;

[0009] There are a plurality of mounting grooves, which are evenly spaced and arranged on the retaining frame along the circumferential direction;

[0010] The needle roller is arranged in the mounting groove, and both ends of the cylindrical surface of the needle roller have correction surfaces;

[0011] The seal structure is located between the outer ring and the inner ring to prevent contaminants from entering the bearing and to seal the grease;

[0012] The pre-tightening mechanism is arranged inside the outer ring and cooperates with the sealing structure to facilitate disassembly or installation of the sealing structure as a whole and ensure close contact and effective sealing between the sealing structure and the outer ring;

[0013] The preload mechanism comprises:

[0014] A gasket, arranged between the inner ring and the sealing structure;

[0015] Circular slide grooves are opened on the front and rear sides of the outer ring;

[0016] The escape groove is provided at the upper and lower ends of the front and rear sides of the outer ring, and the escape groove extends outward to penetrate the end surface of the outer ring, and the escape groove is connected with the circular slide groove;

[0017] The clamping blocks are arranged on both sides of the outer wall of the sealing structure, the clamping blocks are slidably connected with the circular sliding groove, and the clamping blocks slide out and cooperate with the escape groove.

[0018] In the above technical solution, further, the sealing structure includes:

[0019] Annular sealing rings are arranged on the front and rear sides of the outer ring. Both annular sealing rings are in contact with the retainer and the inner ring. The clamping block is installed on the outer wall of the annular sealing ring. The annular sealing rings seal the gap between the outer ring and the inner ring.

[0020] The sealing cover is interference fit with the annular sealing ring.

[0021] In any of the above technical solutions, further, an oil storage channel is provided inside the retaining frame, the oil storage channel extends forward to penetrate the retaining frame, the number of the oil storage channels is consistent with the number of needle rollers, and the oil storage channels are evenly spaced along the circumferential direction of the retaining frame; oil outlet channels are provided at both ends of the oil storage channel, the oil outlet channels penetrate the retaining frame, the oil outlet channels are located on the left and right sides of the needle rollers, and a piston for blocking the oil storage channel is provided on the front side of the retaining frame.

[0022] In any of the above technical solutions, further, the diameter and length of the needle roller make it suitable for high-speed operation, maintaining low friction and high load-bearing capacity.

[0023] In any of the above technical solutions, further, the needle roller is made of high-strength and wear-resistant steel material.

[0024] In any of the above technical solutions, further, the surfaces of the outer ring and the inner ring are treated with rust-proof and corrosion-resistant treatments to improve their service life and stability.

[0025] The beneficial effects of the utility model are:

[0026] 1. Move the sealing structure outward to remove the card block from the escape groove, thereby disassembling the sealing structure, align the card block with the escape groove, and then push the sealing structure to move inward of the outer ring, and then stably install the sealing structure in the outer ring, ensuring close contact and effective sealing between the sealing structure and the outer ring, and facilitating the disassembly and installation of the sealing structure as a whole;

[0027] 2. The annular seal prevents external pollutants, such as dust and moisture, from entering the bearing, closes the gap between the outer ring and the inner ring, thereby protecting the needle rollers and other key components inside the bearing from damage, and seals the grease to ensure that the bearing has sufficient lubrication during operation;

[0028] 3. The lubricating oil is stored in the oil reservoir. When the sealed needle roller bearing is running, the oil reservoir supplies the lubricating oil to the contact surfaces of the needle rollers and other bearing components through the oil outlet channels evenly distributed around the cage, ensuring its normal operation and reducing friction and wear, thereby extending its service life and improving performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0030] Figure 2 It is an exploded view of the utility model;

[0031] Figure 3 It is a cross-sectional view of the cage of the utility model;

[0032] The reference numerals in the figure are: 1, outer ring; 2, inner ring; 3, retaining frame; 4, mounting groove; 5, needle roller; 6, preload mechanism; 61, gasket; 62, circular slide groove; 63, escape groove; 64, block; 7, sealing structure; 71, annular sealing ring; 72, sealing cover; 8, oil storage channel; 9, oil outlet channel; 10, piston. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0034] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] Embodiment 1:

[0036] like Figure 1 and Figure 2 As shown, this embodiment provides a sealed needle roller bearing, comprising:

[0037] An outer ring 1 having an inner ring 2 for enclosing a circular hollow inner cavity for accommodating a rotor;

[0038] A cage 3 is arranged between the inner part of the outer ring 1 and the outer surface of the inner ring 2;

[0039] There are a plurality of mounting grooves 4, which are evenly spaced and arranged on the retaining frame 3 along the circumferential direction;

[0040] The needle roller 5 is arranged in the mounting groove 4, and both ends of the cylindrical surface of the needle roller 5 have modified curved surfaces;

[0041] A sealing structure 7 is located between the outer ring 1 and the inner ring 2 to prevent contaminants from entering the bearing and to seal the grease;

[0042] The pre-tightening mechanism 6 is arranged inside the outer ring 1 and cooperates with the sealing structure 7 to facilitate disassembly or installation of the sealing structure 7 as a whole and ensure close contact and effective sealing between the sealing structure 7 and the outer ring 1;

[0043] The pre-tightening mechanism 6 comprises:

[0044] A gasket 61 is provided between the inner ring 2 and the sealing structure 7;

[0045] The circular slide groove 62 is provided at the front and rear sides of the outer ring 1;

[0046] The escape groove 63 is provided at the upper and lower ends of the front and rear sides of the outer ring 1. The escape groove 63 extends outward to penetrate the end surface of the outer ring 1. The escape groove 63 is connected to the circular slide groove 62.

[0047] The clamping blocks 64 are arranged on both sides of the outer wall of the sealing structure 7 , and the clamping blocks 64 are slidably connected with the circular sliding groove 62 , and the clamping blocks 64 are slidably matched with the escape groove 63 .

[0048] In the present technical solution, the outer ring 1 has a circular hollow inner cavity for accommodating the rotor components in the bearing. The inner ring 2 is located inside the outer ring 1 and together with the outer ring 1 constitutes the main structure of the bearing. The retaining frame 3 is arranged between the inner ring 2 and the outer ring 1 to support and position the needle roller 5. The mounting grooves 4 are evenly distributed on the retaining frame 3 along the circumference and are used to install and fix the needle rollers 5 to ensure their correct position and movement in the bearing. The needle rollers 5 are installed in the mounting grooves 4 of the retaining frame 3 and have a cylindrical shape with modified curved surfaces at both ends. This design helps to reduce rolling friction and increase the bearing capacity of the bearing. The sealing structure 7 is located between the outer ring 1 and the inner ring 2. The sealing structure 7 has two main functions: one is to prevent external pollutants such as dust and moisture from entering the bearing and protect the needle rollers 5 and other key components from damage; the other is to seal the grease to ensure that the bearing has sufficient lubrication during operation. The preload mechanism 6 is arranged inside the outer ring 1 and used in conjunction with the sealing structure 7. The function of the preload mechanism 6 is to ensure close contact and effective sealing between the sealing structure 7 and the outer ring 1, and to facilitate the disassembly and installation of the sealing structure 7 as a whole, and to facilitate the lubrication of the needle roller 5. It includes the following key components: a gasket 61 is installed between the retaining frame 3 and the sealing structure 7 to adjust and ensure the predetermined gap and pressure, a circular slide 62 is opened on the front and rear sides of the inner part of the outer ring 1, and a release groove 63 is opened on the upper and lower ends of the front and rear sides and passes through the end face of the outer ring 1. The design of these structures enables the block 64 to slide in the circular slide 62 and slide out of the release groove 63, thereby realizing the convenient disassembly and installation of the sealing structure 7.

[0049] When it is necessary to apply lubricating oil to the needle roller 5, the sealing structure 7 is rotated, and the sealing structure 7 drives the block 64 to slide along the circular slide groove 62. When the block 64 rotates until the circular slide groove 62 is connected to the escape groove 63, the sealing structure 7 is moved outward, so that the block 64 is moved out of the escape groove 63, so that the sealing structure 7 is disassembled. Then, the gasket 61 is taken out, and the needle roller 5 can be oiled. After the oiling work is completed, the gasket 61 is first placed inside the outer ring 1, the gasket 61 is fitted with the inner ring 2, the block 64 is aligned with the escape groove 63, and then the sealing structure 7 is pushed to move into the outer ring 1, and the block 64 is driven to move inward along the escape groove 63 to the circular slide groove 62. Then, the user rotates the sealing structure 7, so that the block 64 is staggered with the escape groove 63, and the sealing structure 7 is stably installed in the outer ring 1. The sealing structure 7 prevents external pollutants such as dust and moisture from entering the bearing, protects the needle roller 5 and other key components from damage, and seals the grease to ensure that the bearing has sufficient lubrication during operation. The sealed needle roller 5 bearing can effectively prevent pollutants from entering the bearing while ensuring good sealing, extend the service life of the bearing and improve its performance stability, ensure close contact and effective sealing between the sealing structure 7 and the outer ring 1, and facilitate the disassembly and installation of the sealing structure 7 as a whole. This bearing is suitable for a variety of industrial applications, including fields requiring efficient sealing and reliable performance.

[0050] Embodiment 2:

[0051] This embodiment provides a sealed needle roller bearing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0052] like Figure 1 and Figure 2 As shown, in this embodiment, the optimized sealing structure 7 includes:

[0053] Annular sealing rings 71 are arranged at the front and rear sides of the outer ring 1. Both annular sealing rings 71 are in contact with the retainer 3 and the inner ring 2. The clamping block 64 is installed on the outer wall of the annular sealing ring 71. The annular sealing ring 71 seals the gap between the outer ring 1 and the inner ring 2.

[0054] The sealing cover 72 is interference fit with the annular sealing ring 71 .

[0055] In the present technical solution, the annular sealing ring 71 is installed on the front and rear sides of the outer ring 1 of the sealed needle roller 5 bearing. The annular sealing ring 71 is in close contact with the retaining frame 3 and the inner ring 2 to form an effective sealing structure 7. The main function of the annular sealing ring 71 is to prevent external pollutants, such as dust, moisture, etc., from entering the interior of the bearing. They close the gap between the outer ring 1 and the inner ring 2 by contacting the outer ring 1 and the inner ring 2, thereby protecting the needle roller 5 and other key components inside the bearing from damage. The clamping block 64 is installed on the outer wall of the annular sealing ring 71. The combination of the clamping block 64 and the annular sealing ring 71 is achieved by interference fit, which means that the size design of the clamping block 64 and the annular sealing ring 71 enables them to be tightly fixed together while being able to perform necessary relative movement. The position and movement of the clamping block 64 enable the annular sealing ring 71 to maintain its effective sealing performance when the bearing is running, and will not fail or loosen due to the movement of the bearing. The interference fit between the sealing cover 72 and the annular sealing ring 71 is used to further enhance the sealing effect. The sealing cover 72 is fastened to the annular sealing ring 71 to ensure that the possibility of external pollutants entering the bearing is further reduced without affecting the normal operation of the bearing. The working principle of the sealed needle roller 5 bearing is to achieve effective sealing of the internal space of the bearing through the synergistic effect of the annular sealing ring 71 and the sealing cover 72, which not only protects the inside of the bearing from being invaded by pollutants, but also ensures that the bearing can maintain stable lubrication conditions and performance levels during operation, thereby extending its service life and improving reliability.

[0056] Embodiment 3:

[0057] This embodiment provides a sealed needle roller bearing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0058] like Figure 2 and Figure 3 As shown, in this embodiment, the cage 3 is optimized to have an oil storage channel 8 inside, which extends forward to penetrate the cage 3. The number of the oil storage channels 8 is the same as that of the needle rollers 5, and they are evenly spaced along the circumferential direction of the cage 3. Oil outlet channels 9 are provided at both ends of the oil storage channel 8, which penetrate the cage 3 and are located on the left and right sides of the needle rollers 5. A piston 10 for blocking the oil storage channel 8 is provided on the front side of the cage 3.

[0059] In the present technical solution, a plurality of oil storage channels 8 are designed inside the retainer 3 of the sealed needle roller 5 bearing. The number of these oil storage channels 8 is the same as that of the needle roller 5 and they are evenly distributed along the circumferential direction of the retainer 3. Each oil storage channel 8 extends to the front end inside the retainer 3 to penetrate the retainer 3. The left and right ends of the oil storage channel 8 are provided with oil outlet channels 9 penetrating the retainer 3. The oil outlet channels 9 are located on the left and right sides of the needle roller 5, allowing lubricating oil or other lubricating media to flow out of the oil storage channel 8 to achieve the lubrication of the needle roller 5 and other bearing components. The front side of the retainer 3 is provided with a piston 10 for blocking the oil storage channel 8. The function of the piston 10 is to prevent the lubricating oil from flowing out of the oil storage channel 8 when necessary, or to change the effective length of the oil storage channel 8 when adjusting the amount of lubricating oil. The piston 10 can control the opening or closing of the oil storage channel 8 by adjusting its position or design, thereby adjusting the lubrication condition and performance of the bearing.

[0060] Working principle:

[0061] After the sealing structure 7 is disassembled as a whole, an appropriate amount of lubricating oil is added to the oil storage channel 8, and the lubricating oil is stored in the oil storage channel 8. When the sealed needle roller 5 bearing is running, the oil storage channel 8 supplies the lubricating oil to the contact surface of the needle roller 5 and other bearing components through the oil outlet channels 9 evenly distributed around the retaining frame 3. The position of the piston 10 controls the opening and closing of the oil storage channel 8. When the piston 10 blocks the oil storage channel 8, the lubricating oil cannot flow out, thereby maintaining the lubrication state of the bearing; when the piston 10 allows the oil storage channel 8 to open, the lubricating oil can flow freely to the bearing components, ensuring their normal operation and reducing friction and wear. The sealed needle roller 5 bearing effectively manages and distributes the lubricating oil through the design of the oil storage channel 8, the oil outlet channel 9 and the piston 10, so as to ensure the good lubrication and reliability of the bearing during long-term operation, thereby extending its service life and improving its performance.

[0062] Embodiment 4:

[0063] This embodiment provides a sealed needle roller bearing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0064] like Figure 2 As shown, in this embodiment, the diameter and length of the needle roller 5 are optimized to make it suitable for high-speed operation while maintaining low friction and high load-bearing capacity.

[0065] In this technical solution, by optimizing the size and geometry of the needle roller 5, it is possible to reduce friction losses during high-speed operation while maintaining a high load-bearing capacity, thereby improving the efficiency and durability of the bearing, especially in high-speed and high-load working environments, thereby ensuring long-term stable operation of the bearing.

[0066] like Figure 2 As shown, in this embodiment, the needle roller 5 is optimized to be made of high-strength and wear-resistant steel material.

[0067] In this technical solution, high-strength and wear-resistant steel material is selected to manufacture the needle roller 5, which can significantly improve the durability and wear resistance of the bearing, ensuring that the bearing is not easily deformed or damaged during long-term use, thereby extending the service life of the bearing and reducing maintenance requirements.

[0068] like Figure 1 and Figure 2 As shown, in this embodiment, the surfaces of the outer ring 1 and the inner ring 2 are optimized to be rust-proof and corrosion-resistant to improve their service life and stability.

[0069] In this technical solution, the surfaces of the outer ring 1 and the inner ring 2, which have been treated with rust and corrosion resistance, effectively prevent the bearing from being damaged in a humid or corrosive environment, which not only extends the life of the bearing, but also improves its stability and reliability under various working conditions, and reduces the risk of performance degradation or failure due to corrosion.

[0070] In summary, the sealed needle roller bearing aims to achieve low friction, high load capacity, long life, anti-wear and corrosion resistance by optimizing the design and material selection of the needle roller 5, as well as special treatment of the surface of the outer ring 1 and the inner ring 2, thereby improving the overall performance and reducing maintenance costs.

[0071] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. Sealed needle roller bearing, characterized in that: include: An outer ring (1) having an inner ring (2) for enclosing a circular hollow inner cavity for accommodating a rotor; A retainer (3) is arranged between the interior of the outer ring (1) and the outer surface of the inner ring (2); A plurality of mounting grooves (4) are evenly spaced and arranged on the retaining frame (3) along the circumferential direction; A needle roller (5) is arranged in the mounting groove (4), and both ends of the cylindrical surface of the needle roller (5) have corrected curved surfaces; A sealing structure (7) is located between the outer ring (1) and the inner ring (2) to prevent contaminants from entering the interior of the bearing and to seal the grease; A pre-tightening mechanism (6) is arranged inside the outer ring (1) and cooperates with the sealing structure (7) to facilitate disassembly or installation of the sealing structure (7) as a whole and ensure close contact and effective sealing between the sealing structure (7) and the outer ring (1); The pre-tightening mechanism (6) comprises: A gasket (61) is arranged between the inner ring (2) and the sealing structure (7); A circular slide groove (62) is provided on both the front and rear sides of the outer ring (1); An escape groove (63) is provided at the upper and lower ends of the front and rear sides of the outer ring (1), the escape groove (63) extends outward to penetrate the end surface of the outer ring (1), and the escape groove (63) is connected to the circular slide groove (62); The clamping block (64) is arranged on both sides of the outer wall of the sealing structure (7), the clamping block (64) is slidably connected with the circular sliding groove (62), and the clamping block (64) is slidably matched with the escape groove (63).

2. The sealed needle roller bearing according to claim 1, characterized in that: The sealing structure (7) comprises: annular sealing rings (71) are arranged on the front and rear sides of the outer ring (1), the two annular sealing rings (71) are in contact with the retaining frame (3) and the inner ring (2), and the clamping block (64) is installed on the outer wall of the annular sealing ring (71), and the annular sealing ring (71) is used to seal the gap between the outer ring (1) and the inner ring (2); The sealing cover (72) is interference-fitted with the annular sealing ring (71).

3. The sealed needle roller bearing according to claim 1, characterized in that: An oil storage channel (8) is provided inside the retaining frame (3), and the oil storage channel (8) extends forward to penetrate the retaining frame (3). The number of the oil storage channels (8) is the same as that of the needle rollers (5), and they are evenly spaced along the circumferential direction of the retaining frame (3). Oil outlet channels (9) are provided at both left and right ends of the oil storage channel (8), and the oil outlet channels (9) penetrate the retaining frame (3). The oil outlet channels (9) are located on the left and right sides of the needle rollers (5). A piston (10) for blocking the oil storage channel (8) is provided on the front side of the retaining frame (3).

4. The sealed needle roller bearing according to claim 1, characterized in that: The diameter and length of the needle roller (5) make it suitable for high-speed operation, maintaining low friction and high load-bearing capacity.

5. The sealed needle roller bearing according to claim 1, characterized in that: The needle roller (5) is made of high-strength and wear-resistant steel material.

6. The sealed needle roller bearing according to claim 1, characterized in that: The surfaces of the outer ring (1) and the inner ring (2) are both subjected to rust-proof and corrosion-resistant treatments to improve their service life and stability.

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