Double-row tapered roller bearing with dustproof effect

Abstract

The utility model discloses a double-row tapered roller bearing with a dustproof effect, and belongs to the technical field of bearing dust prevention. The bearing includes: an inner ring; the outer ring and the inner ring are arranged at an interval, and annular grooves are formed in the two sides of the outer ring; and the dustproof cover comprises a connecting part, and the connecting part is in elastic interference fit with the annular groove. The technical problem that an existing dustproof cover is not easy to install is solved.

Description

Technical Field

[0001] This utility model relates to the field of bearing dust prevention technology, and in particular to a double-row tapered roller bearing with dust prevention effect. Background Technology

[0002] Dust prevention in bearings is crucial for ensuring proper bearing operation and extending their lifespan. Dust, particulate matter, and other contaminants entering the bearing can accelerate wear, lead to lubrication failure, increased noise, and even malfunction. Common dust prevention methods include using physical barriers such as dust covers and sealing rings to prevent external contaminants from entering. Dust covers are typically installed on both sides of the bearing and are suitable for clean environments; sealing rings provide a better seal and are suitable for dusty or humid environments. In addition, regularly cleaning the area around the bearing and using high-quality lubricants can effectively reduce contamination.

[0003] When using dust covers for bearing dust protection, the dust covers can be installed by press-fitting. During the design process, for the sake of dust protection effect, the dust cover needs to form a tight fit between the inner and outer rings of the bearing. Therefore, the dust cover is relatively inconvenient to install. To address this, a double-row tapered roller bearing with an easy-to-install dust cover is proposed. Utility Model Content

[0004] The main purpose of this invention is to provide a double-row tapered roller bearing with dustproof effect, aiming to solve the technical problem that the dust cover is not easy to install.

[0005] To achieve the above objectives, the present invention proposes a double-row tapered roller bearing with dustproof effect, comprising:

[0006] Inner circle;

[0007] The outer ring is spaced apart from the inner ring, and annular grooves are formed on both sides of the outer ring;

[0008] A dust cover, the dust cover including a connecting part, the connecting part being elastically interference-fitted with the annular groove.

[0009] Optionally, in one embodiment of the present invention, the dust cover includes:

[0010] Dustproof section, wherein the dustproof section is arranged at a distance from the retainer;

[0011] A connecting part, which is connected to the dustproof part and to the outer ring;

[0012] The reinforcing part is connected to the dustproof part.

[0013] Optionally, in one embodiment of the present invention, the connecting part is an open ring, and the opening direction of the open ring is towards the retainer.

[0014] Optionally, in one embodiment of the present invention, the reinforcing part is an annular protrusion facing the retainer, and there is a gap between the reinforcing part and the retainer.

[0015] Optionally, in one embodiment of the present invention, the reinforcing part has an annular recess on the side away from the retainer and an annular protrusion on the side facing the retainer.

[0016] Optionally, in one embodiment of the present invention, the cross-section of the annular recess is trumpet-shaped and gradually tightens towards the cage.

[0017] Optionally, in one embodiment of the present invention, the corners of the annular recess and the annular protrusion are rounded.

[0018] Optionally, in one embodiment of the present invention, the dust cover further includes a sealing lip, which is disposed on the inner periphery of the dustproof part.

[0019] Optionally, in one embodiment of this utility model, the dust cover is an integral structure.

[0020] Optionally, in one embodiment of the present invention, an oil storage tank is provided in the inner ring.

[0021] Compared with existing technologies, this utility model achieves at least the following beneficial effects. The technical solution of this utility model achieves rapid installation of the dust cover by employing an elastic interference fit. During installation, the dust cover is gradually pressed into the outer ring of the bearing. During this pressing process, the connecting part is compressed and deformed, reducing its volume. When the connecting part is pressed into the annular groove, the space around the connecting part increases, and the connecting part returns to its original shape, filling the annular groove, thus achieving an elastic interference fit and fixing the dust cover to the bearing. Because the dust cover and the outer ring of the bearing have an elastic interference fit, it is a detachable connection. Therefore, the dust cover can be disassembled later to access the internal components of the bearing. This elastic interference fit solves the current technical problem of the difficulty in installing bearing dust covers. 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the double-row tapered roller bearing with dustproof effect according to this utility model;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of the dust cover in one embodiment of the dustproof double-row tapered roller bearing of this utility model;

[0026] Figure 4 A schematic diagram of the structure of the dust cover in another embodiment of the dustproof double-row tapered roller bearing of this utility model;

[0027] Figure 5 for Figure 4 A magnified view of a section at point B in the middle.

[0028] Explanation of icon numbers:

[0029] 100 Inner ring; 110 Oil reservoir; 200 Outer ring; 210 Annular groove; 300 Cage; 400 Dust cover; 410 Connecting part; 420 Reinforcing part; 430 Sealing lip;

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] 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.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] Reference Figures 1-5 This utility model proposes a double-row tapered roller bearing with dustproof effect, comprising:

[0036] Inner circle 100;

[0037] The outer ring 200 is arranged at intervals with the inner ring 100, and the outer ring 200 has annular grooves 210 on both sides.

[0038] The dust cover 400 includes a connecting part 410, which is elastically interference-fitted with the annular groove 210.

[0039] This solution achieves rapid installation of the dust cover 400 by employing an elastic interference fit. During installation, the dust cover 400 is gradually pressed into the bearing outer ring 200. During this pressing process, the connecting part 410 is compressed and deformed, reducing its volume. When the connecting part 410 is pressed into the annular groove 210, the space around the connecting part 410 increases, and the connecting part 410 returns to its original shape, filling the annular groove 210, thus achieving an elastic interference fit and fixing the dust cover 400 to the bearing. Because the dust cover 400 and the bearing outer ring 200 have an elastic interference fit and are detachable, the dust cover 400 can be disassembled later to access the internal components of the bearing. This elastic interference fit solves the current technical problem of the difficulty in installing bearing dust covers 400.

[0040] This fit ensures a tight seal between the dust cover 400 and the bearing outer ring 200, forming a highly efficient sealing barrier. This effectively prevents dust, moisture, and impurities from entering the bearing, thus protecting its cleanliness and lubrication, and extending its service life. Secondly, the flexible interference fit reduces the gap between the dust cover 400 and the outer ring 200, avoiding vibration and noise caused by looseness or gaps, resulting in smoother and quieter bearing operation and improved overall equipment performance. Furthermore, this fit firmly fixes the dust cover 400 to the bearing outer ring 200, preventing displacement or detachment during operation, ensuring the long-term stability and reliability of the dust cover 400, and reducing the frequency of maintenance and replacement. Finally, the flexible interference fit simplifies the installation process, typically eliminating the need for additional fasteners or complex installation tools. The dust cover 400 can be directly installed onto the bearing outer ring 200 by pressing or tapping, improving assembly efficiency.

[0041] Specifically, the connecting part 410 has an open ring structure. When the dust cover 400 is assembled by press fitting, the open ring will automatically shrink during the process of abutting against the outer ring 200, so as to be gradually pressed into the outer ring 200. After the open ring enters the annular groove 210, the open ring will automatically complete the deformation recovery and fill the groove, thus completing the fixation of the dust cover 400.

[0042] Furthermore, during the press-fitting process, the dust cover 400 may deform towards the cage 300. The deformed dust cover 400 may affect the balance of the bearing during operation and may also come into contact with the internal components of the bearing, increasing the friction during the bearing rotation.

[0043] To this end, the dust cover 400 is designed with a reinforcing part 420 to enhance its structural strength. Specifically, the dust cover acts as a barrier, preventing dust, impurities, and other particles from the environment from entering the bearing and affecting its operation. The connecting part 410 connects the dust cover 400 to the outer ring 200 of the bearing, fixing the position of the dust cover 400. The reinforcing part 420 improves the structural strength of the dust cover 400 and prevents deformation during press-fitting. Furthermore, in addition to the press-fitting process, it also reduces deformation of the dust cover 400 due to centrifugal force or vibration during normal operation, preventing seal failure.

[0044] Furthermore, under high-speed rotation or high-load conditions, the dust cover 400 often deforms due to centrifugal force, vibration, or external impacts (such as splashing particles). The reinforced structure significantly enhances the rigidity of the cover, preventing gaps between it and the bearing, thus avoiding grease leakage or contaminant intrusion. Secondly, maintaining stable sealing directly extends bearing life. By reducing the entry of dust, moisture, and solid particles into the bearing, abnormal wear of the rolling elements and raceways can be effectively reduced. Simultaneously, the sealing structure's retention of grease ensures continuous bearing lubrication, slowing material fatigue and inhibiting crack formation. This progressive design logic of "anti-deformation - sealing preservation - life extension" makes the bearing dust cover 400 a key component in complex mechanical systems, balancing protective effectiveness and durability.

[0045] Reference Figure 3 In one optional embodiment, the reinforcing part 420 is an annular protrusion facing the cage 300, and attention should be paid to the thickness of the annular protrusion. There is a gap between the annular protrusion and the cage 300. The annular protrusion forms a locally reinforced area on the surface of the dust cover 400 with a linear protrusion structure, which significantly enhances the bending resistance of the thin-walled structure, effectively resists deformation caused by assembly pressure or external impact, and provides stable support for subsequent functional realization. Based on the increase in rigidity, the stress distribution is optimized. The annular protrusion reduces local stress peaks by dispersing concentrated loads, avoiding fatigue cracking caused by long-term use, and is especially suitable for harsh working conditions such as high-speed rotation or frequent start-stop. On the basis of this mechanical optimization, the sealing reliability is simultaneously enhanced. The stable geometry ensures that the dust cover 400 fits tightly with the bearing assembly, reducing micro-gaps caused by deformation. Furthermore, compared with the overall thickening solution, the annular protrusion only requires additive material in key areas, which maintains the advantage of lightweight and reduces material consumption, meeting the modern industry's pursuit of high efficiency and low cost.

[0046] Reference Figure 4 In another alternative embodiment, the reinforcing part 420 has an annular recess on the side away from the retainer 300 and an annular protrusion on the side facing the retainer 300.

[0047] In the aforementioned embodiments, the annular protrusion needs to be manufactured using processes such as injection molding and subsequently refined, which is a complex and time-consuming process. In contrast, this reinforcing structure can be directly formed by stamping, eliminating the need for complex equipment and requiring minimal post-stamping finishing, thus achieving high-performance protection at a low cost.

[0048] Furthermore, the annular recess is funnel-shaped, gradually tightening towards the cage 300. Because of its funnel shape, the surface of the dustproof part transitions to the bottom of the recess via a slope. This transition design disperses concentrated stress, preventing fatigue cracking caused by assembly stress or uneven thermal expansion. Additionally, the annular recess can also serve as a positioning structure during the press-fitting process of the dust cover 400.

[0049] To further optimize the structure of the reinforcing part 420, the corners of the reinforcing part 420 are designed as rounded corners.

[0050] Furthermore, the inner periphery of the dustproof part is a sealing lip 430, which can seal the inner ring 100 of the bearing and prevent gaps between the dust cover 400 and the inner ring 100 of the bearing.

[0051] Furthermore, the dust cover 400 is a one-piece structure. This one-piece structure provides higher structural strength and stability, enabling it to better withstand external impacts and vibrations, reducing the risk of failure due to loose or deformed components, thereby extending the bearing's service life. In addition, this design reduces gaps and connection points between components, lowering vibration and noise during operation, and improving the smoothness and quietness of bearing operation.

[0052] Furthermore, the bearing type in this solution is a double-row tapered roller bearing. This type of bearing is typically used in heavy-duty working environments, thus placing high demands on the bearing's lubrication.

[0053] Reference Figure 2 To improve the lubrication of the bearing, an oil reservoir 110 is provided in the inner ring 100 of the bearing. Specifically, the position of the oil reservoir 110 corresponds to the positions of the two ends of the rolling elements. The oil reservoir 110 serves as a dynamic storage space for lubricating oil, continuously supplying oil to the contact area between the rolling elements and the raceway during bearing operation, forming a uniform oil film and reducing dry friction and localized wear. Simultaneously, the flow of lubricating oil in the clearance not only enhances the lubrication coverage but also efficiently absorbs and carries away frictional heat through heat conduction and convection, preventing material degradation due to excessive temperature rise. This process further creates conditions for dynamic clearance adjustment. When the bearing expands thermally or deforms under load, the reserved clearance in the oil reservoir 110 can buffer the internal stress caused by dimensional changes, thereby improving overall load-bearing stability.

[0054] In addition, the oil reservoir 110 can also serve as a "buffer zone" to capture externally intruding particulate contaminants (such as dust or metal shavings) and prevent them from embedding between the rolling elements and the raceway and causing scratches.

[0055] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A double-row tapered roller bearing with dustproof effect, characterized in that, include: Inner circle; The outer ring is spaced apart from the inner ring, and annular grooves are formed on both sides of the outer ring; A dust cover, the dust cover including a connecting part, the connecting part being elastically interference-fitted with the annular groove; The dust cover also includes: A dustproof part is arranged at a distance from the cage, and a connecting part is connected to the dustproof part and to the outer ring; The reinforcing part is connected to the dustproof part.

2. The double-row tapered roller bearing with dustproof effect as described in claim 1, characterized in that, The connecting part is an open ring, and the opening of the open ring faces the cage.

3. The double-row tapered roller bearing with dustproof effect as described in claim 1, characterized in that, The reinforcing part is an annular protrusion facing the cage, and there is a gap between the reinforcing part and the cage.

4. The double-row tapered roller bearing with dustproof effect as described in claim 3, characterized in that, The reinforcing part has an annular recess on the side away from the cage and an annular protrusion on the side facing the cage.

5. The double-row tapered roller bearing with dustproof effect as described in claim 4, characterized in that, The cross-section of the annular recess is trumpet-shaped and gradually narrows towards the cage.

6. The double-row tapered roller bearing with dustproof effect as described in claim 5, characterized in that, The corners of the annular recess and the annular protrusion are rounded.

7. The double-row tapered roller bearing with dustproof effect as described in claim 1, characterized in that, The dust cover also includes a sealing lip, which is disposed on the inner periphery of the dustproof part.

8. The double-row tapered roller bearing with dustproof effect as described in claim 1, characterized in that, The dust cover is a one-piece structure.

9. The double-row tapered roller bearing with dustproof effect as described in claim 1, characterized in that, An oil storage tank is provided in the inner ring.

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