Sealed bearing

Abstract

The utility model discloses a sealed bearing, which relates to the technical field of bearing manufacturing and comprises a bearing seat, a first sealing element and a second sealing element, a bearing core outer ring, a bearing core inner ring and a steel ball between the bearing core outer ring and the bearing core inner ring are arranged in the bearing seat, and retainers are arranged on the two sides of the steel ball; the first sealing piece is installed between the bearing core outer ring and the bearing core inner ring, the top of the first sealing piece is clamped to the inner diameter of the bearing core outer ring, and the first sealing piece is used for sealing the bearing seat; the second sealing piece is installed between the bearing core outer ring and the bearing core inner ring, the bottom of the second sealing piece is installed on the outer diameter of the bearing core inner ring, and the second sealing piece is located on the side, away from the bearing seat, of the first sealing piece. Therefore, grease between the bearing core outer ring and the bearing core inner ring can be subjected to two-layer sealing through the first sealing piece and the second sealing piece, so that the sealing effect of the bearing seat can be greatly improved, and grease leakage in the using process can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of bearing manufacturing technology, and in particular to a sealed bearing. Background Technology

[0002] During the operation of the fan, it is not allowed for the grease inside the bearing to fly out of the bearing during high-speed operation, so as to avoid grease contamination of the external environment.

[0003] However, since sealed bearings operate at relatively high speeds, some of the grease can leak out from the seal during use. Alternatively, when refilling the grease, excess grease can leak out from the seal due to the replacement of old and new grease, causing pollution to the operating environment. Therefore, there is an urgent need for a sealed bearing that can always keep the external operating environment clean.

[0004] Therefore, ensuring that grease does not overflow from the bearing during high-speed operation or when relubricating is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a sealed bearing that ensures that grease does not overflow from the bearing during high-speed operation or when grease is re-lubricated.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A sealed bearing, comprising:

[0008] The bearing housing contains an outer ring and an inner ring of the bearing core, as well as steel balls between the outer and inner rings of the bearing core. Retainers are provided on both sides of the steel balls.

[0009] The first seal is installed between the outer ring and the inner ring of the bearing core. The top of the first seal is engaged with the inner diameter of the outer ring of the bearing core. The first seal is used to seal the bearing housing.

[0010] The second seal is installed between the outer ring and the inner ring of the bearing core. The bottom of the second seal is installed on the outer diameter of the inner ring of the bearing core, and the second seal is located on the side of the first seal away from the bearing housing.

[0011] Preferably, the first seal includes a first skeleton and a first sealing lip. The top of the first skeleton is engaged with the inner diameter of the outer ring of the bearing core, the bottom of the first skeleton abuts against the outer diameter of the inner ring of the bearing core, and the first sealing lip is disposed on the side of the first skeleton near the bearing seat and abuts against the outer diameter of the inner ring of the bearing core.

[0012] Preferably, a snap-fit ​​groove is provided at the inner diameter edge of the outer ring of the bearing core, and a rolled edge is provided at the top of the first frame, which is snapped into the snap-fit ​​groove by riveting.

[0013] Preferably, the second seal includes a second skeleton and a sealing portion. The skeleton is detachably mounted on the outer diameter of the inner ring of the bearing core by screws. The sealing portion is disposed on the top of the second skeleton, and a second sealing lip extending toward the first skeleton is provided on the side of the sealing portion near the first seal. The second sealing lip abuts against the outer side of the first skeleton.

[0014] Preferably, a gap is provided between the sealing part and the edge of the outer ring of the bearing core.

[0015] Preferably, the first sealing lip and the sealing part are both made of rubber, and the first skeleton and the second skeleton are both made of stainless steel.

[0016] Preferably, plastic protective covers are provided on both sides of the bearing housing to prevent spilled grease from flying into the external space.

[0017] Preferably, the outer periphery of the plastic protective cover is provided with a claw, which is used to engage with the protective groove provided on the bearing housing, and the inner diameter of the plastic protective cover forms a clearance fit with the rotating shaft passing through the inner ring of the bearing core.

[0018] Preferably, the inner ring of the bearing core is provided with a set screw for fixing the rotating shaft.

[0019] Preferably, the upper side of the bearing housing is provided with an grease nipple for injecting grease into it.

[0020] Compared to the aforementioned background technology, the present invention provides a sealed bearing, comprising: a bearing housing, a first seal, and a second seal; the bearing housing having an outer bearing ring and an inner bearing ring inside, and a steel ball between the outer and inner bearing rings, with retainers on both sides of the steel ball; the first seal being installed between the outer and inner bearing rings, with its top engaged with the inner diameter of the outer bearing ring, and used to seal the bearing housing; and the second seal being installed between the outer and inner bearing rings, with its bottom engaged with the outer diameter of the inner bearing ring, and located on the side of the first seal away from the bearing housing.

[0021] In other words, in this embodiment, the bearing housing has double-layer seals installed on both sides, namely the outer ring and inner ring of the bearing core, to seal the bearing. Specifically, the seals are a first seal and a second seal. The first seal is located in the inner layer and is engaged with the inner diameter of the outer ring of the bearing core, allowing it to rotate with the outer ring. The bottom end of the first seal abuts against the outer diameter of the inner ring. The second seal is located in the outer layer and is located outside the first seal, fixedly installed on the outer diameter of the inner ring of the bearing core. Both seals can rotate together. In this way, the first and second seals can provide a double seal for the grease between the outer and inner rings of the bearing core. This not only significantly improves the sealing effect of the bearing housing but also prevents grease leakage during use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a front view of the sealed bearing provided in an embodiment of the present utility model;

[0024] Figure 2 This is a top view of the sealed bearing provided in an embodiment of the present utility model;

[0025] Figure 3 for Figure 1 Sectional view along the middle AA line;

[0026] Figure 4 for Figure 3 Enlarged view of part B in the middle section.

[0027] in:

[0028] 100-Bearing housing, 110-Bearing core outer ring, 111-Snap-fit ​​groove, 120-Bearing core inner ring, 121-Setting screw, 130-Steel ball, 140-Retainer, 150-Protective groove, 160-Oil nozzle;

[0029] 200 - First seal, 210 - First skeleton, 211 - Rolled edge, 220 - First sealing lip;

[0030] 300 - Second seal, 310 - Second skeleton, 320 - Sealing part, 321 - Second sealing lip;

[0031] 400 - Plastic protective cover, 410 - Clamping claw. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0035] The purpose of this invention is to provide a sealed bearing that ensures that grease does not overflow from the bearing during high-speed operation or when grease is re-lubricated.

[0036] To achieve the above objectives, the present invention provides the following technical solution:

[0037] Please see Figures 1 to 4 This embodiment provides a sealed bearing, including: a bearing housing 100, a first seal 200, and a second seal 300; the bearing housing 100 has an outer bearing core ring 110 and an inner bearing core ring 120 disposed inside, and a steel ball 130 between the outer bearing core ring 110 and the inner bearing core ring 120, with retainers 140 disposed on both sides of the steel ball 130; the first seal 200 is installed between the outer bearing core ring 110 and the inner bearing core ring 120, with the top of the first seal 200 engaging with the inner diameter of the outer bearing core ring 110, and the first seal 200 is used to seal the bearing housing 100; the second seal 300 is installed between the outer bearing core ring 110 and the inner bearing core ring 120, with the bottom of the second seal 300 installed on the outer diameter of the inner bearing core ring 120, and the second seal 300 is located on the side of the first seal 200 away from the bearing housing 100.

[0038] In this embodiment, the bearing housing 100 includes an outer ring 110 and an inner ring 120 of the bearing core, with a plurality of steel balls 130 installed between them. In addition, a retainer 140 is provided between the outer ring 110 and the inner ring 120 of the bearing core. The retainer 140 can separate the steel balls 130, prevent the steel balls 130 from contacting each other directly, avoid them from colliding or rubbing against each other during operation, and when rotating at high speed, the retainer 140 guides the steel balls 130 to roll along the correct path instead of sliding, reducing the deviation or loss of control caused by centrifugal force.

[0039] The first seal 200 is installed between the outer ring 110 and the inner ring 120 of the bearing core to seal the space between them, preventing grease leakage or impurities from entering the bearing. The second seal 300 is also installed between the outer ring 110 and the inner ring 120 of the bearing core, but it is located outside the first seal 200. The gap between the second seal 300 and the first seal 200 forms a labyrinth seal, further sealing the interior of the bearing and preventing grease leakage or the intrusion of external debris.

[0040] In other words, in this embodiment, double-layer seals are installed on both sides of the bearing housing 100, namely the outer ring 110 and the inner ring 120 of the bearing core, to seal the bearing. Specifically, the seals are a first seal 200 and a second seal 300. The first seal 200 is located in the inner layer and is engaged with the inner diameter of the outer ring 110, allowing it to rotate with the outer ring 110. The bottom end of the first seal 200 abuts against the outer diameter of the inner ring. The second seal 300 is the outer layer seal, located outside the first seal 200 and fixedly installed on the outer diameter of the inner ring 120, allowing both to rotate together. In this way, the first seal 200 and the second seal 300 can provide a double seal for the grease between the outer ring 110 and the inner ring 120 of the bearing core, which not only significantly improves the sealing effect of the bearing housing 100 but also prevents grease leakage during use.

[0041] Preferably, the first seal 200 includes a first skeleton 210 and a first sealing lip 220. The top of the first skeleton 210 is engaged with the inner diameter of the outer ring 110 of the bearing core, and the bottom of the first skeleton 210 abuts against the outer diameter of the inner ring 120 of the bearing core. The first sealing lip 220 is disposed on the side of the first skeleton 210 near the bearing housing 100 and abuts against the outer diameter of the inner ring 120 of the bearing core.

[0042] Specifically, such as Figure 3 and Figure 4As shown, the first seal 200 includes a first skeleton 210 and a first sealing lip 220, both of which can be bonded together with adhesive or connected tightly using a suitable method. The top of the first skeleton 210 can be snapped onto the inner diameter edge of the outer ring 110 of the bearing core, so that the first skeleton 210 rotates with the outer ring 110 of the bearing core. Simultaneously, to ensure a seal within the bearing, the bottom end of the first sealing lip 220 abuts against the outer diameter of the inner ring 120 of the bearing core. Preferably, the first sealing lip 220 and the inner ring 120 of the bearing core have an interference fit, preventing grease from leaking out. It should be noted that, to avoid affecting the rotation of the inner ring 120 of the bearing core, the contact between the first sealing lip 220 and the inner ring 120 of the bearing core is a flexible contact.

[0043] Preferably, a snap-fit ​​groove 111 is provided at the inner diameter edge of the outer ring 110 of the bearing core, and a rolled edge portion 211 is provided at the top of the first frame 210. The rolled edge portion 211 is snapped into the snap-fit ​​groove 111 by riveting.

[0044] Furthermore, such as Figure 4 As shown, the top of the first frame 210 is provided with a deformable rolled edge 211. Correspondingly, the inner diameter edge of the outer ring 110 of the bearing core is provided with a snap-fit ​​groove 111. When the first seal 200 needs to be installed, the rolled edge 211 can be directly riveted into the snap-fit ​​groove 111 to complete the installation. After installation, the two will not loosen or fall off, and no grease will flow out from this position.

[0045] Preferably, the second seal 300 includes a second frame 310 and a sealing portion 320. The frame is detachably mounted on the outer diameter of the inner ring 120 of the bearing core by screws. The sealing portion 320 is disposed on the top of the second frame 310, and a second sealing lip 321 extending toward the first frame 210 is provided on the side of the sealing portion 320 near the first seal 200. The second sealing lip 321 abuts against the outer side of the first frame 210.

[0046] In this embodiment, the second frame 310 and the sealing part 320 are also integral structures, and the two are fixedly connected together. The connection method can be selected according to the actual situation. The bottom end of the second frame 310 has an L-shaped structure, which can be connected to the outer ring 110 of the bearing core by screws. There is a certain gap between the second frame 310 and the first frame 210. The sealing part 320 has a second sealing lip 321 extending from the side near the first seal 200. The second sealing lip 321 extends inward until it abuts against the first frame 210, which can enhance the sealing performance of the bearing. Similarly, the second sealing lip 321 and the first frame 210 are flexibly connected, so as not to affect the rotation of the bearing.

[0047] Preferably, a gap is provided between the sealing part 320 and the edge of the outer ring 110 of the bearing core.

[0048] like Figure 4 As shown, it is understandable that this design can prevent the sealing part 320 from rubbing against the outer ring 110 of the bearing core during bearing operation. This can ensure the normal operation of the bearing, reduce the wear of the outer ring 110 of the bearing core and the second seal 300, and extend the service life of the bearing housing 100.

[0049] Preferably, the first sealing lip 220 and the sealing part 320 are both made of rubber, and the first skeleton 210 and the second skeleton 310 are both made of stainless steel.

[0050] In this embodiment, the first sealing lip 220 and the sealing part 320 are preferably made of rubber, specifically silicone rubber, while the first skeleton 210 and the second skeleton 310 are preferably made of stainless steel. These materials have high temperature resistance and wear resistance, which can effectively extend the service life of the sealed bearing.

[0051] Preferably, plastic protective covers 400 are provided on both sides of the bearing housing 100 to prevent spilled grease from flying into the external space.

[0052] In this embodiment, as Figures 1 to 3 As shown, plastic protective covers 400 are detachably installed on both sides of the bearing housing 100, thus providing full-enclosure protection for the entire bearing core. Because the plastic protective cover 400 maintains a certain cavity, even if some grease leaks out during use, it will remain within the cavity of the plastic protective cover 400, preventing further leakage. The entire bearing thus possesses a certain degree of self-cleaning performance. Furthermore, because the plastic protective cover 400 has sufficient cavity, even if some grease leaks out during grease injection, it will not leak into the external space, further improving the bearing's service life.

[0053] Preferably, the outer periphery of the plastic protective cover 400 is provided with a claw 410, which is used to engage with the protective groove 150 provided on the bearing housing 100, and the inner diameter of the plastic protective cover 400 forms a clearance fit with the rotating shaft passing through the inner ring 120 of the bearing core.

[0054] Specifically, in order to facilitate the installation and removal of the plastic protective cover 400, several claws 410 are evenly arranged on its outer periphery. Correspondingly, several protective grooves 150 are provided on the bearing housing 100. The claws 410 of the plastic protective cover 400 can be precisely engaged with the inside of the protective grooves 150, thereby completing the installation of the plastic protective cover 400. In addition, in order to prevent the plastic protective cover 400 from affecting the normal operation of the rotating shaft passing through the inner ring 120 of the bearing core, the inner diameter of the plastic protective cover 400 is clearance-fitted with the rotating shaft. This setting does not affect its operation and can also prevent grease leakage.

[0055] Preferably, the inner ring 120 of the bearing core is provided with a set screw 121 for fixing the rotating shaft.

[0056] In this embodiment, the rotating shaft is fixed by a set screw 121 passing through the inner ring 120 of the bearing core, which increases the convenience of installing and disassembling the rotating shaft.

[0057] Preferably, the bearing housing 100 is provided with an oil nozzle 160 for injecting grease into its interior.

[0058] In this embodiment, an oil nozzle 160 is added to the bearing housing 100, which allows for periodic re-lubrication of the bearing, ensuring good lubrication performance during use, improving the overall service life of the bearing, and ensuring long-term high-speed and stable operation of the bearing, thereby further improving the overall service life.

[0059] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A sealed bearing, characterized in that, include: A bearing housing (100) is provided inside, which is a bearing core outer ring (110) and a bearing core inner ring (120), and a steel ball (130) between the bearing core outer ring (110) and the bearing core inner ring (120). A retainer (140) is provided on both sides of the steel ball (130). A first seal (200) is installed between the outer ring (110) and the inner ring (120) of the bearing core. The top of the first seal (200) is engaged with the inner diameter of the outer ring (110) of the bearing core. The first seal (200) is used to seal the bearing housing (100). The second seal (300) is installed between the outer ring (110) and the inner ring (120) of the bearing core. The bottom of the second seal (300) is installed on the outer diameter of the inner ring (120) of the bearing core, and the second seal (300) is located on the side of the first seal (200) away from the bearing housing (100).

2. The sealed bearing according to claim 1, characterized in that, The first seal (200) includes a first skeleton (210) and a first sealing lip (220). The top of the first skeleton (210) is engaged with the inner diameter of the outer ring (110) of the bearing core, and the bottom of the first skeleton (210) abuts against the outer diameter of the inner ring (120) of the bearing core. The first sealing lip (220) is disposed on the side of the first skeleton (210) near the bearing seat (100) and abuts against the outer diameter of the inner ring (120) of the bearing core.

3. The sealed bearing according to claim 2, characterized in that, A snap-fit ​​groove (111) is provided at the inner diameter edge of the outer ring (110) of the bearing core, and a rolled edge (211) is provided at the top of the first skeleton (210). The rolled edge (211) is snapped into the snap-fit ​​groove (111) by riveting.

4. The sealed bearing according to claim 2, characterized in that, The second seal (300) includes a second skeleton (310) and a sealing part (320). The skeleton is detachably mounted on the outer diameter of the inner ring (120) of the bearing core by screws. The sealing part (320) is disposed on the top of the second skeleton (310), and the sealing part (320) is provided with a second sealing lip (321) extending toward the first skeleton (210) on the side of the sealing part (320) near the first seal (200). The second sealing lip (321) abuts against the outside of the first skeleton (210).

5. The sealed bearing according to claim 4, characterized in that, A gap is provided between the sealing part (320) and the edge of the outer ring (110) of the bearing core.

6. The sealed bearing according to claim 4, characterized in that, The first sealing lip (220) and the sealing part (320) are both made of rubber, and the first skeleton (210) and the second skeleton (310) are both made of stainless steel.

7. The sealed bearing according to claim 1, characterized in that, Plastic protective covers (400) are provided on both sides of the bearing housing (100) to prevent spilled grease from flying out into the external space.

8. The sealed bearing according to claim 7, characterized in that, The outer periphery of the plastic protective cover (400) is provided with a claw (410), which is used to engage with the protective groove (150) provided on the bearing seat (100). The inner diameter of the plastic protective cover (400) forms a clearance fit with the rotating shaft passing through the inner ring (120) of the bearing core.

9. The sealed bearing according to claim 8, characterized in that, The inner ring (120) of the bearing core is provided with a set screw (121) for fixing the rotating shaft.

10. The sealed bearing according to claim 1, characterized in that, The bearing housing (100) is provided with an oil nozzle (160) on its upper side for injecting grease into it.

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