Needle bearing with double-layer seal

Abstract

The needle bearing comprises a barrel-shaped outer ring, a needle roller, a lock washer and a sealing ring, the needle roller is arranged on the inner wall of the outer ring, the sealing ring is arranged at the opening position of the outer ring, the lock washer is arranged between the sealing ring and the needle roller, and the needle roller is arranged on the outer ring. The sealing ring comprises a first framework, a second framework, a first ring body and a second ring body, the section of the first framework is in an L shape, the bottom edge of the first framework is connected to the inner wall of the outer ring, the side edge of the first framework abuts against the end face of the lock washer, the first ring body is connected to the first framework, a matching groove is formed in the first ring body, and the matching groove is matched with the matching groove. The second framework comprises a connecting part, a bending part and a matching part, the connecting part is connected to the inner wall of the outer ring, the bending part is hooked in the matching groove, and the matching part is fixedly connected with the second ring body. The bearing is simple in structure, can have a better sealing effect, and prevents external dust and impurities from entering the bearing.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of double-layer sealed needle roller bearing. BACKGROUND

[0002] In the current industrial production and mechanical application field, the common needle roller bearing, its structural form generally includes outer ring. In the inner space of outer ring, retainer is provided, and evenly distributed with needle roller on the retainer. The needle roller bearing of this traditional structure exposes some obvious drawbacks in actual operation process. Among them, the more prominent problem is poor sealing. Due to the insufficient sealing performance, the oil storage effect is greatly discounted. This makes some dust, impurities and other foreign matters in the working environment easily enter the inside of bearing, once these dust and impurities enter, will produce friction with needle roller and other internal components, and then increase unnecessary wear of bearing. In the long run in this wear state, the service life of bearing will be significantly reduced, not only increases equipment maintenance cost, but also can cause equipment failure, affects production efficiency. Therefore, in order to meet the higher requirements of industrial production for equipment stability and durability, it is imminent to develop a needle roller bearing with more excellent sealing effect, which can effectively prolong the service life of needle roller bearing and improve the overall performance of equipment. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a kind of needle roller bearing with double-layer sealing, its structure is simple, can have better sealing effect, block the dust, impurities of outside into bearing.

[0004] To achieve the above object, the utility model provides a kind of needle roller bearing with double-layer sealing, including barrel-shaped outer ring, needle roller, stop washer, sealing ring, the needle roller is set on outer wall, the sealing ring is set in outer ring opening position, the stop washer is set between sealing ring and needle roller, the sealing ring includes first skeleton, second skeleton, first ring body and second ring body, the first skeleton section is L letter shape setting, the first skeleton bottom edge is connected on outer wall, the first skeleton side edge is contacted on stop washer end face, the first ring body is connected on the first skeleton between setting first skeleton and second skeleton, the first ring body is formed with cooperation groove, the second skeleton includes sequentially connected connecting portion, bending portion and cooperation portion, the connecting portion is connected on outer wall, the bending portion is hooked in cooperation groove, the cooperation portion is fixedly connected with second ring body.

[0005] The beneficial effect of the arrangement is that the first skeleton and the second skeleton can be stably combined to a certain extent through the matching groove, ensuring the integrity and stability of the sealing structure, and can be assembled separately. This feature greatly improves the convenience of assembly, significantly improves production efficiency, reduces assembly difficulty and cost in actual production process, and the structure has excellent dustproof effect, can effectively block dust and impurities from entering the bearing, the tight fit of the first skeleton and the second skeleton and the stable connection of the two with the inner wall of the outer ring form an effective barrier, when the second skeleton is deformed by external resistance, the first skeleton can quickly play a buffering role, like an elastic shield, reducing the influence of external impact on the second skeleton. Moreover, the first skeleton also has the ability to reset the second skeleton. Once the external interference disappears, the first skeleton will reset the second skeleton to the initial state by its own elastic restoring force, thereby continuously ensuring the sealing effect of the sealing ring and ensuring that the bearing is always in a good operating environment, prolonging the service life of the bearing.

[0006] As a further arrangement of the utility model, at least two layers of blocking lips are formed on the first ring body, and the first ring body extends a surrounding blocking edge to the matching groove, which is attached to the outer wall of the second skeleton bending part.

[0007] The beneficial effect of the arrangement is that the blocking lips are layered, greatly improving the dustproof effect of the bearing, making it more difficult for fine dust and impurities to enter the bearing, effectively reducing the risk of wear caused by foreign matter invasion, and through the surrounding blocking edge, on the one hand, it can assist the second skeleton in precise positioning, ensuring that the second skeleton is always in the correct position during installation and use, maintaining the stability of the entire sealing structure, on the other hand, the surrounding blocking edge is tightly attached to the outer wall of the second skeleton bending part, shielding the second skeleton from external erosion, effectively prolonging the service life of the second skeleton and further protecting the sealing performance of the sealing ring, providing a solid guarantee for the stable operation of the bearing.

[0008] As a further arrangement of the utility model, the second ring body extends a shielding lip to the second skeleton bending part.

[0009] The beneficial effect of the arrangement is that the combination of the shielding lip, the first ring body and the second skeleton forms a meandering space, which greatly improves the dustproof capability of the bearing. When the dust and impurities from the outside try to enter the bearing, they will first be blocked by the shielding lip. Since the shielding lip is closely connected to the bent part of the second skeleton, most of the dust is isolated outside. Even if a small amount of dust manages to bypass the shielding lip, it will still be hindered by the complex space formed by the first ring body and the second skeleton. The dust will keep hitting the wall in this meandering space and will have difficulty finding a path to the inside of the bearing, thus being completely intercepted. Therefore, the dustproof effect of the needle bearing is qualitatively improved, effectively prolonging the service life of the bearing.

[0010] As a further arrangement of the present application, the second ring body extends outwardly from the outer peripheral wall of the outer ring and has an outer shielding lip attached to the outer peripheral wall of the outer ring.

[0011] The beneficial effect of the arrangement is that the outer shielding lip acts as a stable support extending from the second ring body to the outer peripheral wall of the outer ring, providing a strong support on the outer side of the second skeleton and the second ring body. When the bearing is in operation and subjected to forces and vibrations from different directions, the outer shielding lip effectively disperses and buffers these external forces by being attached to the outer peripheral wall of the outer ring, preventing the second skeleton and the second ring body from being displaced or deformed due to external force impact. This not only ensures the integrity of the sealing structure, but also ensures that the second skeleton and the second ring body always remain in the optimal working position, thereby maintaining good sealing performance and providing reliable protection for the internal components of the bearing.

[0012] As a further arrangement of the present application, the outer ring further comprises a thrust washer, the thrust washer and the stop washer are respectively located at both ends of the needle, the thrust washer is located at the bottom of the barrel-shaped outer ring, and the outer ring is provided with a tool withdrawal groove corresponding to the position of the thrust washer.

[0013] The beneficial effect of the arrangement is that the thrust washer and the stop washer cooperate with the two ends of the needle to keep the needle in a stable rotating state. The bottom of the outer ring does not directly contact the needle, but contacts the needle through the thrust washer, which can reduce the cost requirement. The tool withdrawal groove can cooperate with the thrust washer to provide a space for deformation and buffering when the needle and the thrust bearing are in contact, such as partial buffering when subjected to axial impact. On the other hand, it can reduce weight and has little effect on strength. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structure of the embodiment of the present application is shown in the figure;

[0015] Figure 2 The embodiment of the present application Figure 1A partial enlarged view of the middle A part. DETAILED DESCRIPTION

[0016] The utility model provides a kind of embodiment of needle roller bearing with double-layer sealing, as shown in Figures 1 to 2 Including barrel-shaped outer ring 1, needle 2, stop washer 3, sealing ring, the needle 2 is arranged on the inner wall of outer ring 1, the sealing ring is arranged in the opening position of outer ring 1, the stop washer 3 is arranged between sealing ring and needle 2, the sealing ring includes first skeleton 4, second skeleton 5, first ring body 6 and second ring body 7, the first skeleton 4 section is L-shaped and is arranged, the bottom edge of the first skeleton 4 is connected on the inner wall of outer ring 1, the side edge of the first skeleton 4 is abutted on the end face of stop washer 3, the first ring body 6 is arranged between first skeleton 4 and second skeleton 5 and is connected on the first skeleton 4, cooperation groove 61 is formed on the first ring body 6, the second skeleton 5 includes sequentially connected connecting portion 51, bending portion 52 and cooperation portion 53, the connecting portion 51 is connected on the inner wall of outer ring 1, the bending portion 52 is hooked in cooperation groove 61, the cooperation portion 53 is fixedly connected with second ring body 7.The beneficial effect of being thus arranged is: thus arranged, by cooperation groove 61, so that the first skeleton 4 and second skeleton 5 can not only be firmly combined to a certain extent, ensure the integrity and stability of sealing structure, but also can be assembled separately.This feature greatly improves the convenience of assembly, can significantly improve production efficiency, reduce assembly difficulty and cost in actual production process, the structure has excellent dustproof effect, can effectively block dust and impurities from entering the bearing interior, the close cooperation of first skeleton 4 and second skeleton 5, combined with the stable connection of the inner wall of outer ring 1, forms an effective barrier, when second skeleton 5 is deformed by external abutment, first ring body 6 can quickly play the buffering effect, like an elastic shield, reduce the influence of external impact on second skeleton 5.Not only that, first ring body 6 also has the ability to reset second skeleton 5.Once external interference disappears, first ring body 6 will reset second skeleton 5 to the initial state by its own elastic restoring force, so as to continuously guarantee the sealing effect of sealing ring, ensure that the bearing interior is always in good running environment, prolong the service life of bearing.

[0017] As a further arrangement of the present embodiment, at least two layers of the blocking lip 62 are formed on the first ring body 6, and the first ring body 6 extends to the fitting groove 61 with a surrounding blocking edge 63 which is attached to the outer wall of the bent portion 52 of the second skeleton 5. The beneficial effect of such an arrangement is that the blocking lip 62 is layered, greatly improving the dustproof effect of the bearing, making it difficult for fine dust and impurities to enter the interior of the bearing, effectively reducing the risk of wear caused by foreign matter invasion, and through the surrounding blocking edge 63, on the one hand, it can assist the accurate positioning of the second skeleton 5, ensuring that the second skeleton 5 is always in the correct position during installation and use, maintaining the stability of the entire sealing structure, on the other hand, the surrounding blocking edge 63 is closely attached to the outer wall of the bent portion 52 of the second skeleton 5, which tightly shields the second skeleton 5 from external erosion, effectively prolonging the service life of the second skeleton 5, further ensuring the sealing performance of the sealing ring, and providing a solid guarantee for the stable operation of the bearing.

[0018] As a further arrangement of the present embodiment, the second ring body 7 extends to the bent portion 52 of the second skeleton 5 with a shielding lip 71. The beneficial effect of such an arrangement is that through the combination of the shielding lip 71, the first ring body 6 and the second skeleton 5, a meandering space is formed, which greatly improves the dustproof ability of the bearing. When dust and impurities from the outside attempt to enter the interior of the bearing, they will first encounter the blocking of the shielding lip 71, and since the shielding lip 71 is closely connected to the bent portion 52 of the second skeleton 5, most of the dust is isolated outside. Even if a small amount of dust manages to bypass the shielding lip 71, it will still face the complex space formed by the first ring body 6 and the second skeleton 5, which will hinder the dust from finding a path to the interior of the bearing, thus being completely intercepted. Thus, the dustproof effect of the needle roller 2 bearing has undergone a qualitative leap, effectively prolonging the service life of the bearing.

[0019] As a further arrangement of the present embodiment, the second ring body 7 extends to the outer peripheral wall of the outer ring 1 with an outer blocking lip 72, and the end of the outer blocking lip 72 is attached to the outer peripheral wall of the outer ring 1. The beneficial effect of such an arrangement is that the outer blocking lip 72 extends from the second ring body 7 to the outer peripheral wall of the outer ring 1, providing a strong support on the outside of the second skeleton 5 and the second ring body 7. When the bearing is subjected to forces and vibrations from different directions during operation, the outer blocking lip 72 effectively disperses and buffers these external forces by being attached to the outer peripheral wall of the outer ring 1, preventing the second skeleton 5 and the second ring body 7 from being displaced or deformed due to external force impact. This not only ensures the integrity of the sealing structure, but also ensures that the second skeleton 5 and the second ring body 7 always remain in the best working position, thereby maintaining good sealing performance and providing reliable protection for the internal components of the bearing.

[0020] As a further arrangement of the present embodiment, the outer ring 1 is further provided with a thrust washer 8, the stop washer 3 and the thrust washer 8 are respectively located at both ends of the needle roller 2, the thrust washer 8 is located at the bottom of the barrel-shaped outer ring 1, and the outer ring 1 is provided with a tool withdrawal groove corresponding to the position of the thrust washer 8. The beneficial effect of such arrangement is that the thrust washer 8 and the stop washer 3 can cooperate with both ends of the needle roller 2 to keep the needle roller 2 in a stable rotating state. Here, the bottom of the outer ring 1 does not directly contact the needle roller 2, but contacts the needle roller 2 through the thrust washer 8, which can reduce the cost requirement. The design of the tool withdrawal groove can cooperate with the thrust washer 8 to provide a space for deformation and buffering when the needle roller 2 abuts against the thrust bearing, for example, to partially buffer the axial impact. On the other hand, it can reduce the weight and has little effect on the strength.

[0021] The above examples are only one of the preferred specific examples of the present application, and the usual changes and replacements made by those skilled in the art within the scope of the technical scheme of the present application are all included in the protection scope of the present application.

Claims

1. A needle bearing with double seal, comprising a barrel-shaped outer ring, a needle, a stop washer, a sealing ring, the needle is arranged on the inner wall of the outer ring, the sealing ring is arranged at the opening position of the outer ring, and the stop washer is arranged between the sealing ring and the needle, characterized in that: The sealing ring comprises a first skeleton, a second skeleton, a first ring body and a second ring body, the first skeleton is in L-shaped cross section, the bottom edge of the first skeleton is connected to the inner wall of the outer ring, the side edge of the first skeleton abuts against the end face of the stop washer, the first ring body is arranged between the first skeleton and the second skeleton and is connected to the first skeleton, the first ring body is formed with a matching groove, the second skeleton comprises a connecting part, a bending part and a matching part which are connected in sequence, the connecting part is connected to the inner wall of the outer ring, the bending part is hooked in the matching groove, and the matching part is fixedly connected with the second ring body.

2. A needle bearing with double seal according to claim 1, characterized in that: The first ring body is formed with at least two layers of blocking lip, the first ring body extends to the matching groove and is provided with a surrounding blocking edge, and the surrounding blocking edge is attached to the outer wall of the bending part of the second skeleton.

3. A needle bearing with double seal according to claim 2, characterized in that: The second ring body extends to the bending part of the second skeleton and is provided with a shielding lip.

4. The double seal needle bearing of claim 1, wherein: The second ring body extends to the outer peripheral wall of the outer ring and is provided with an outer blocking lip, and the end of the outer blocking lip is attached to the outer peripheral wall of the outer ring.

5. The double seal needle bearing of claim 1, wherein: The outer ring is further provided with a thrust washer, the stop washer and the thrust washer are respectively located at two ends of the needle, the thrust washer is located at the bottom of the barrel-shaped outer ring, and the outer ring is provided with a tool withdrawal groove corresponding to the position of the thrust washer.

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