Dustproof cover for double-row tapered roller bearing

Abstract

The utility model discloses a dustproof cover for a double-row tapered roller bearing, and belongs to the technical field of bearing dust prevention. The dustproof cover comprises a dustproof part, and the dustproof part and a retainer of the bearing are arranged at an interval; the connecting part is connected with the dustproof part and is detachably connected with the outer ring of the bearing; and the reinforcing part is connected with the dustproof part. The technical problem that an existing bearing dust cover is prone to deformation in the press fitting process is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing dustproof technical field, especially relate to a dust cover for double row tapered roller bearing. BACKGROUND

[0002] Bearing shield is a basic form of bearing sealing structure, mainly used for blocking external pollutants (such as dust, debris) into the bearing, while preventing lubricant leakage, thereby prolonging the bearing life and reducing the maintenance frequency. Its core function is between complete sealing and open design, suitable for medium and low speed, cleanliness requirement moderate working condition.

[0003] When installing the dust cover, including press fitting method, gluing method, snap-in method and the like, the dust cover may be deformed in the press fitting process, thereby affecting the normal operation of the bearing due to the contact between the dust cover and the retainer, and therefore the current bearing dust cover has the technical problem of easy deformation in the press fitting process. UTILITY MODEL CONTENTS

[0004] The utility model discloses a dust cover for double row tapered roller bearing, which aims to solve the technical problem of easy deformation in the press fitting process of the current bearing dust cover.

[0005] To achieve the above-mentioned purpose, the dust cover for double row tapered roller bearing according to the utility model is located on both sides of the bearing and comprises:

[0006] A dustproof part is arranged apart from the retainer of the bearing.

[0007] A connecting part is connected with the dustproof part and detachably connected with the outer ring of the bearing.

[0008] A reinforcing part is connected with the dustproof part.

[0009] Optionally, in an embodiment of the utility model, the reinforcing part is an annular protrusion towards the retainer, and the reinforcing part has a space apart from the retainer.

[0010] Optionally, in an embodiment of the utility model, the side of the reinforcing part away from the retainer is an annular recess, and the side of the reinforcing part towards the retainer is an annular protrusion.

[0011] Optionally, in an embodiment of the utility model, the cross section of the annular recess is trumpet-shaped and gradually tightens towards the retainer.

[0012] Optionally, in an embodiment of the utility model, the corners of the annular recess and the annular protrusion are rounded.

[0013] Optionally, in an embodiment of the utility model, the reinforcing part is a plurality of semispherical protrusions, the plurality of semispherical protrusions are located on the side of the dustproof part close to the retainer, and the plurality of semispherical protrusions are annular.

[0014] Optionally, in an embodiment of the utility model, the connecting part and the outer ring are in elastic interference fit.

[0015] Optionally, in an embodiment of the utility model, the outer ring is provided with a groove, the connecting part is arranged on the outer periphery of the dustproof part, and the connecting part is an open ring.

[0016] Optionally, in an embodiment of the utility model, the utility model further comprises a sealing lip, and the sealing lip is arranged on the inner periphery of the dustproof part.

[0017] Optionally, in an embodiment of the utility model, the dust cover is of an integral structure.

[0018] Compared with the prior art, the utility model can at least realize the following beneficial effects. In the process of assembling the bearing dust cover, the dust cover needs to be installed on the bearing by pressure mounting, but in the process of pressure mounting, the dust cover may be deformed inward, the deformed dust cover may affect the balance of the bearing during operation, and may also contact the internal components of the bearing, increasing the friction during rotation of the bearing. The dust cover in the scheme comprises a dustproof part, a connecting part and a reinforcing part, wherein the dustproof part plays a blocking role, avoids the particles such as dust and impurities in the environment from entering the inside of the bearing to affect the operation of the bearing, the connecting part is used for connecting the dust cover and the outer ring of the bearing, fixing the position of the dust cover, and the reinforcing part is used for improving the structural strength of the dust cover, preventing the dust cover from being deformed during pressure mounting. In addition, in addition to the process of pressure mounting, the dust cover can also be deformed due to centrifugal force or vibration during normal operation, avoiding sealing failure. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0020] Figure 1 It is the cross-sectional view of the dust cover for double-row tapered roller bearing of the utility model embodiment 1.

[0021] Figure 2 It is the cross-sectional view of the dust cover for double-row tapered roller bearing of the utility model embodiment 2.

[0022] Figure 3 It is the perspective view of the dust cover for double-row tapered roller bearing embodiment 3 of the utility model;

[0023] Figure 4 It is the sectional view of the dust cover for double-row tapered roller bearing embodiment 3 of the utility model;

[0024] Figure 5 It is Figure 4 The structure enlarged view of A in the middle.

[0025] Explanation of reference numerals:

[0026] 100, dustproof part; 110, sealing lip; 200, connecting part; 210, split ring; 300, reinforcing part; 310, semispherical protrusion; 320, annular reinforcing rib; 330, annular recess;

[0027] The utility model discloses the realization, functional characteristics and advantages will be further described with reference to the embodiment. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0029] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0030] In the utility model, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0032] Referring to Figures 1-5 The utility model proposes a kind of dust cover for double-row tapered roller bearing, located at the both sides of bearing, comprising:

[0033] Dust part 100, dust part 100 is arranged with the interval of the retainer of bearing;

[0034] Connecting portion 200, it is connected with dust part 100, and it is detachably connected with the outer ring of bearing;

[0035] Reinforcing portion 300, reinforcing portion 300 is connected with dust part 100.

[0036] In the process of assembling bearing dust cover, dust cover needs to be installed to bearing by the way of press fitting, but in the process of press fitting, dust cover can be deformed, dust cover after deformation can influence the balance of bearing in the process of bearing operation, also can contact with bearing internal component, increase the friction in the process of bearing rotation. The dust cover in the scheme includes dust part 100, connecting portion 200 and reinforcing portion 300, wherein, dust part 100 plays the role of blocking, avoids the particles such as dust, impurity in environment to enter the inside of bearing and influence the operation of bearing, connecting portion 200 is used to connect dust cover with the outer ring of bearing, fixes the position of dust cover, reinforcing portion 300 is used to improve the structural strength of dust cover, prevent dust cover from deforming in the process of press fitting. In addition, in addition to in the process of press fitting, reinforcing portion 300 can also reduce the possibility of deformation of dust cover due to centrifugal force or vibration in the process of normal operation, avoid sealing failure.

[0037] In addition, the reinforcing structure designed in the bearing dust cover can also improve its anti-deformation ability to ensure sealing reliability. Under high-speed rotation or high-load working conditions, the dust cover often deforms due to centrifugal force, vibration or external impact (such as splashing particles), and the reinforcing structure can significantly enhance the rigidity of the cover body to prevent gaps between the cover body and the bearing, thereby avoiding leakage of lubricating grease or intrusion of contaminants. Secondly, the stable maintenance of the sealing directly prolongs the service life of the bearing, which can effectively reduce the abnormal wear of the rolling elements and the raceway by reducing the entry of dust, water vapor and solid particles into the bearing; at the same time, the sealing structure ensures the retention of lubricating grease, which ensures the continuous lubrication of the bearing, reduces material fatigue and inhibits crack generation. The progressive design logic of "anti-deformation-sealing-life extension" makes the bearing dust cover a key component in complex mechanical systems that takes into account protection effectiveness and durability.

[0038] Embodiment 1

[0039] With reference to Figure 1 In this embodiment, the specific structure of the reinforcing portion 300 is a plurality of semispherical protrusions 310, which are arranged in a circular ring shape as a whole and located on the side of the dustproof portion 100 close to the retainer.

[0040] Firstly, the semispherical protrusions 310 form micro support points by local thickening, and when the dust cover is stressed during the pressing process, the curved surface structure can disperse the concentrated stress to the surrounding area, avoiding deformation or rupture caused by excessive stress at a single point, thereby enhancing the compression and bending resistance of the key parts. On this basis, the annular arrangement of the protrusions further optimizes the overall stability: the protrusions evenly distributed along the circumference form a continuous support ring in the circumferential direction, which can resist the radial expansion force generated by high-speed rotation; in the axial direction, the protrusions form a "wrinkling effect" similar to corrugated plates, which absorbs vibration energy through geometric deformation and suppresses the warping deformation caused by installation pressing or long-term vibration. More importantly, this design has unique adaptability to dynamic working conditions, and the semispherical streamlined curved surface can reduce lubricating grease flow turbulence and reduce the risk of resonance.

[0041] Embodiment 2

[0042] With reference to Figure 2In Embodiment 2, the reinforcing portion 300 is a ring-shaped protrusion towards the retainer direction, i.e. a ring-shaped reinforcing rib 320. The reinforcing rib forms a local strengthening area on the surface of the dust cover with a linear protrusion, significantly enhancing the bending resistance of the thin-walled structure and effectively resisting deformation caused by assembly pressure or external impact, providing stable support for subsequent function implementation. Based on the improvement in rigidity, the stress distribution is optimized, and the ring-shaped reinforcing rib 320 disperses the concentrated load, reduces the local stress peak, and avoids fatigue cracking caused by long-term application, 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 also enhanced, and the stable geometric shape ensures that the dust cover closely fits the bearing assembly, reducing the micro-gap caused by deformation. Further, compared with the overall thickening scheme, the reinforcing rib only needs to be added in the key area, maintaining the lightweight advantage and reducing material consumption, which meets the pursuit of high efficiency and low cost in modern industry.

[0043] Embodiment 3

[0044] Reference Figures 3-5 This embodiment is a variation of Embodiment 2. In this embodiment, the reinforcing portion 300 has a ring-shaped reinforcing rib 320 on the side towards the retainer and a ring-shaped recess 330 on the side away from the retainer. Unlike the previous embodiments, the reinforcing structures in the previous embodiments all need to be refined after injection molding, which is a relatively complex process and requires a long time. In Embodiment 3, the reinforcing portion 300 can be directly formed by stamping without the need for complex equipment investment, and no long-term modification is required after stamping, achieving high-performance protection at low cost.

[0045] Further, the ring-shaped recess 330 is trumpet-shaped, gradually tightening towards the retainer. Due to the trumpet-shaped ring-shaped recess 330, the surface of the dust cover 100 transitions to the bottom surface of the recess through a slope, and this transition design can disperse concentrated stress and avoid fatigue cracking caused by assembly stress or uneven thermal expansion. In addition, the ring-shaped recess 330 can also serve as a positioning structure during the press fitting of the dust cover.

[0046] To further optimize the structure of the reinforcing portion 300, the corners of the reinforcing portion 300 are designed as rounded corners.

[0047] The specific structure of the dust cover will be further described below, and the following structure can be applied to all the previous embodiments.

[0048] Further, the connecting portion 200 is in elastic interference fit with the outer ring of the bearing. This type of fit can ensure that the dust cover and the outer ring of the bearing are tightly attached, forming an efficient sealing barrier, effectively preventing dust, moisture and impurities from entering the inside of the bearing, thereby protecting the cleanliness and lubrication of the bearing and prolonging its service life. Secondly, the elastic interference fit reduces the gap between the dust cover and the outer ring, avoiding vibration and noise caused by looseness or gap, making the bearing run more smoothly and quietly, improving the overall performance of the equipment. In addition, this type of fit makes the dust cover firmly fixed on the outer ring of the bearing, preventing it from shifting or falling off during operation, ensuring the long-term stability and reliability of the dust cover, reducing the frequency of maintenance and replacement. Finally, the elastic interference fit simplifies the installation process, usually without the need for additional fasteners or complex installation tools, the dust cover can be directly installed on the outer ring of the bearing by press fitting or tapping, improving assembly efficiency.

[0049] Specifically, the connecting portion 200 is located at the outer periphery of the dustproof portion 100, which is an open ring 210, and the opening of the open ring 210 faces the retainer, and the outer ring of the bearing is correspondingly provided with a groove to accommodate the open ring 210. When assembling the dust cover by press fitting, the open ring 210 will automatically shrink during abutting against the outer ring, and after the open ring 210 enters the groove, it will automatically complete the deformation recovery and fill the groove, completing the fixation of the dust cover.

[0050] The dust cover of this connecting structure is simple to assemble and easy to disassemble, and can maintain or repair the inside of the bearing by disassembling the dust cover.

[0051] Further, the inner periphery of the dustproof portion 100 is a sealing lip 110, which can seal the inner ring of the bearing, avoiding gaps between the dust cover and the inner ring of the bearing.

[0052] Further, the dust cover is an integral structure. The dust cover with an integral structure has higher structural strength and stability, can better withstand external impact and vibration, reduce the risk of failure caused by loose or deformed parts, thereby prolonging the service life of the bearing. In addition, this design also reduces the gap and connection points between parts, reduces vibration and noise during operation, improves the smoothness and quietness of the bearing operation.

[0053] The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made by using the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A dust cover for a double row tapered roller bearing, located on both sides of the bearing, characterized in that, The dustproof cover comprises: a dustproof part arranged in a spaced manner with a retainer of a bearing; a connecting part connected with the dustproof part and detachably connected with an outer ring of the bearing; a reinforcing part connected with the dustproof part.

2. The dust cover for a double-row tapered roller bearing according to claim 1, characterized in that The reinforcing part is an annular protrusion towards the retainer, and a space is formed between the reinforcing part and the retainer.

3. The dust cover for a double-row tapered roller bearing according to claim 2, characterized in that A side of the reinforcing part away from the retainer is an annular recess, and a side of the reinforcing part towards the retainer is an annular protrusion.

4. The dust cover for a double-row tapered roller bearing according to claim 3, characterized in that A cross section of the annular recess is in a trumpet shape, and gradually tightens in a direction towards the retainer.

5. The dust cover for a double-row tapered roller bearing according to claim 4, characterized in that A corner of the annular recess and the annular protrusion is a rounded corner.

6. The dust cover for a double-row tapered roller bearing of claim 1, wherein, The reinforcing part is a plurality of semispherical protrusions, the plurality of semispherical protrusions are arranged on a side of the dustproof part close to the retainer, and the plurality of semispherical protrusions are arranged in a ring shape.

7. The dust cover for a double-row tapered roller bearing of claim 1, wherein, An elastic interference fit is formed between the connecting part and the outer ring.

8. The dust cover for a double-row tapered roller bearing according to claim 7, characterized in that The outer ring is provided with a groove, the connecting part is arranged on an outer periphery of the dustproof part, and the connecting part is an open ring.

9. The dust cover for a double-row tapered roller bearing of claim 1, wherein, A sealing lip is further arranged on an inner periphery of the dustproof part.

10. The dust cover for a double-row tapered roller bearing of claim 1, wherein, The dustproof cover is an integral structure.

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