Bearing and sealing structure thereof

Abstract

The utility model relates to the technical field of bearings, in particular to a bearing and a sealing structure thereof, the bearing sealing structure comprises a framework and an elastic body, the outer circle of the framework is bent to form an L shape, and the elastic body comprises an outer ring body, a connecting body and an inner ring body; the inner ring body and the outer ring body are respectively connected with the inner edge and the outer edge of the connecting body and form an accommodating cavity for embedding the framework; the inner circle of the outer ring body protrudes to form an outer flange, the outer circle of the inner ring body protrudes to form an inner flange, and the outer circle end face of the inner flange inclines towards the outside of the containing cavity to form a guide inclined face. A deformation groove is formed in the end, away from the containing cavity, of the inner ring body and located in the position, close to the inner flange, of the inner ring body. The framework is fixed in the form of the inner retaining side and the outer retaining side, and the stability of the framework after embedding installation is guaranteed. Due to the arrangement of the deformation groove, on one hand, the framework is convenient to install, on the other hand, the bearing sealing structure is convenient to install, and meanwhile, after installation is completed, the deformation groove can provide elasticity to improve the sealing effect.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a bearing and a sealing structure thereof. Background Art

[0002] The existing bearing sealing structure mainly consists of two parts: a frame and an elastomer. The frame provides support for the bearing sealing structure and usually adopts an L-shaped structure. The elastomer wraps the frame to form an embedded structure, so that the two are firmly connected together. Then, the bearing sealing structure is installed at the end of the bearing to achieve a sealing effect by contacting the inner ring and outer ring of the bearing.

[0003] However, there are some problems with the existing bearing sealing structure. First, the sealing performance between the bearing sealing structure and the inner and outer rings of the bearing needs to be considered. Due to the movement of the inner and outer rings, the sealing structure needs to be able to effectively prevent grease leakage and external contaminants from entering. Secondly, the embedded structure needs to be firmly wrapped between the skeleton and the elastomer to ensure the reliability and durability of the sealing structure.

[0004] However, it is difficult for the existing bearing sealing structure to simultaneously take into account good sealing performance and convenient installation between the frame and the elastomer. In order to improve the sealing performance, it is often necessary to sacrifice the convenience of installation, while in order to improve the convenience of installation, the sealing effect may be reduced. Therefore, the existing bearing sealing structure has certain limitations in practical applications. Utility Model Content

[0005] In order to take into account both sealing performance and installation convenience, the present application provides a bearing and a sealing structure thereof.

[0006] On the one hand, the present application provides a bearing sealing structure, which adopts the following technical solution:

[0007] A bearing sealing structure comprises a skeleton and an elastomer, wherein the outer circle of the skeleton is bent to form an L shape, and the elastomer comprises an outer ring body, a connecting body and an inner ring body, wherein the inner ring body and the outer ring body are respectively connected to the inner edge and the outer edge of the connecting body to form an accommodating cavity for embedding the skeleton; the inner circle protrusion of the outer ring body forms an outer rib, and the outer circle protrusion of the inner ring body forms an inner rib, and the outer circle end surface of the inner rib is inclined toward the outside of the accommodating cavity to form a guiding inclined surface; a deformation groove is provided at one end of the inner ring body away from the accommodating cavity, and the deformation groove is located at a position of the inner ring body close to the inner rib.

[0008] By adopting the above technical solution, the frame is fixed in the form of inner and outer ribs to ensure its stability after installation. The setting of the deformation groove, on the one hand, by setting the guide slope when the frame is installed, the inner rib can be turned outward through the design of the deformation groove to facilitate the installation of the frame; on the other hand, when installing the bearing sealing structure, the deformation groove can deform the inner ring body to facilitate installation, and after the installation is completed, the deformation groove can provide elasticity to improve the sealing effect.

[0009] In one of the embodiments: the inner rim extends along the opening direction of the accommodating cavity to form a guide protrusion on the elastic body, and the top height of the guide protrusion along the protrusion direction is higher than the outer ring body.

[0010] By adopting the above technical solution, the protrusion can extend the guiding inclined surface, so that the inner circle of the frame can be against the guiding inclined surface when the frame is installed.

[0011] In one embodiment, the inclination angle α of the guiding slope is greater than 20° and less than 45°.

[0012] By adopting the above technical solution, if the inclination angle α is too small, if it is necessary to ensure that the inner circle of the skeleton can be against the guide slope during installation, the height of the guide protrusion will be required to be relatively large. On the one hand, it will waste materials, and on the other hand, it will cause the guide protrusion itself to be deformed due to its excessive height, which will increase the difficulty of installing the skeleton. If the inclination angle α is too large, the force required for installing the skeleton will increase.

[0013] In one embodiment, the inner circle protrusion of the inner ring body forms a sealing portion, and the thickness of the sealing portion is smaller than that of the inner ring body.

[0014] By adopting the above technical solution, the sealing part having a thickness smaller than that of the inner ring body cooperates with the inner ring of the bearing to seal, so that the sealing part can have better deformation ability, thereby ensuring the sealing performance and reducing wear.

[0015] In one embodiment, the thickness of the sealing portion is gradually reduced along the protruding direction.

[0016] By adopting the above technical solution, the deformation capacity of the sealing part can be further improved.

[0017] In one of the embodiments: an angle β between the outer circular edge of the deformation groove and the axial direction is greater than an angle γ between the inner circular edge of the deformation groove and the axial direction.

[0018] By adopting the above technical solution, when the frame is installed, it is easier to install it by deforming the deformation groove.

[0019] In one of the embodiments: the outer circular end surface of the outer ring body is inclined in the direction away from the connecting body to form a guiding inclined surface.

[0020] By adopting the above technical solution, when the bearing sealing structure is installed in the bearing, it can play a guiding role, making it easier to install and fit.

[0021] In one of the embodiments: a deformation notch is provided at one end of the outer ring body away from the accommodating cavity.

[0022] By adopting the above technical solution, the thinner parts of the outer ring body are more likely to deform, which facilitates the installation of the outer circle part of the skeleton. It also facilitates the installation of the bearing sealing structure on the bearing, and cooperates with the guide bevel to make the outer ring body easier to install into the outer ring of the bearing.

[0023] In one of the embodiments: the deformation notch is set to be greater than 90°.

[0024] By adopting the above technical solution, the deformation capacity of the deformation notch is further improved.

[0025] On the other hand, the present application provides a bearing, which adopts the following technical solution:

[0026] A bearing comprises a bearing inner ring and a bearing outer ring, wherein the outer circle of the bearing inner ring is provided with an outer groove, the inner circle of the bearing outer ring is provided with an inner groove, and the bearing sealing structure is installed between the inner groove and the outer groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a partial structural diagram of a bearing in an embodiment, showing the installation structure of a bearing sealing structure and a bearing inner ring and a bearing outer ring;

[0028] Figure 2 Schematic diagram of the cross-section of the bearing seal structure in the embodiment.

[0029] In the figure, 10, bearing outer ring; 11, inner groove; 20, bearing inner ring; 21, outer groove; 100, connector; 200, outer ring body; 210, outer retaining edge; 220, deformation notch; 230, guide slope; 300, inner ring body; 310, inner retaining edge; 311, guide slope; 312, guide protrusion; 320, deformation groove; 330, sealing part; 400, skeleton; 500, accommodating cavity. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0032] A bearing, such as Figure 1 As shown, it includes a bearing inner ring 20 and a bearing outer ring 10 , the outer circle of the bearing inner ring 20 is provided with an outer groove 21 , the inner circle of the bearing outer ring 10 is provided with an inner groove 11 , and a bearing sealing structure is installed between the inner groove 11 and the outer groove 21 .

[0033] like Figure 2 As shown, the bearing sealing structure includes a skeleton 400 and an elastomer. Both the skeleton 400 and the elastomer are in a circular ring structure. In this embodiment, for the convenience of description, a cross section is used for illustration. In the cross-sectional shape, the outer circle of the skeleton 400 is bent toward the inner side of the bearing to form an L shape.

[0034] The elastomer includes an outer ring body 200, a connector 100 and an inner ring body 300. The inner ring body 300 and the outer ring body 200 are respectively connected to the inner edge and the outer edge of the connector 100. The thickness of the connector 100 is smaller than that of the inner ring body 300 and the outer ring body 200, thereby forming a receiving cavity 500 for embedding the skeleton 400.

[0035] The inner circle protrusion of the outer ring body 200 forms an outer rib 210 , which is located at the opening edge of the accommodating cavity 500 and extends inwardly and is arranged parallel to the connecting body 100 , and is abutted against the bending section of the frame 400 through the outer rib 210 .

[0036] The outer circular protrusion of the inner ring body 300 is formed with an inner guard 310, and the inner guard 310 is also located at the opening edge of the accommodating cavity 500 and extends inward, and is arranged parallel to the connecting body 100, forming a structure opposite to the outer guard 210 in the cross section, wherein the distance between the inner guard 310 and the connecting body 100 is smaller than the distance between the outer guard 210 and the connecting body 100, and the distance between the inner guard 310 and the connecting body 100 is equal to the thickness of the skeleton 400.

[0037] In addition, the outer circular end surface of the inner rib 310 is inclined toward the outside of the accommodating cavity 500 to form a guiding inclined surface 311, and the inclination angle α of the guiding inclined surface 311 is greater than 20° and less than 45°. In addition, in order to better guide the frame 400 during installation, the inner rib 310 extends along the opening direction of the accommodating cavity 500 to form a guiding protrusion 312 on the elastic body.

[0038] The inner ring body 300 has a deformation groove 320 at one end away from the accommodating cavity 500, and the deformation groove 320 is located near the inner rib 310 of the inner ring body 300. The angle β between the outer circular edge of the deformation groove 320 and the axial direction is greater than the angle γ between the inner circular edge of the deformation groove 320 and the axial direction.

[0039] A sealing portion 330 is formed on the inner circle protrusion of the inner ring body 300, and the sealing portion 330 cooperates with the outer groove 21 of the bearing inner ring 20 for sealing. The thickness of the sealing portion 330 is smaller than that of the inner ring body 300, and the thickness of the sealing portion 330 is gradually reduced along the protrusion direction.

[0040] The outer ring body 200 is used to cooperate with the inner groove 11 of the bearing outer ring 10 to form a seal. The outer cylindrical end face of the outer ring body 200 is inclined in the direction away from the connecting body 100 to form a guiding slope 230. The end of the outer ring body 200 away from the accommodating cavity 500 is provided with a deformation notch 220, and the deformation notch 220 is set at more than 90°.

[0041] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bearing sealing structure, comprising a frame (400) and an elastic body, wherein the outer circle of the frame (400) is bent into an L-shape, and the elastic body comprises an outer ring body (200), a connecting body (100) and an inner ring body (300), wherein the inner ring body (300) and the outer ring body (200) are respectively connected to the inner edge and the outer edge of the connecting body (100) to form a receiving cavity (500) for embedding the frame (400); wherein: The inner circular protrusion of the outer ring body (200) forms an outer rib (210), and the outer circular protrusion of the inner ring body (300) forms an inner rib (310), and the outer circular end surface of the inner rib (310) is inclined toward the outside of the accommodating cavity (500) to form a guiding inclined surface (311); the inner rib (310) extends along the opening direction of the accommodating cavity (500) on the elastic body to form a guiding protrusion (312), and the top height of the guiding protrusion (312) along the protruding direction is higher than that of the outer ring body (200); a deformation groove (320) is provided at one end of the inner ring body (300) away from the accommodating cavity (500), and the deformation groove (320) is located at a position of the inner ring body (300) close to the inner rib (310); The inner circular protrusion of the inner ring body (300) forms a sealing portion (330), and the thickness of the sealing portion (330) is smaller than that of the inner ring body (300); the angle β between the outer circular edge of the deformation groove (320) and the axial direction is greater than the angle γ between the inner circular edge of the deformation groove (320) and the axial direction.

2. The bearing sealing structure according to claim 1 is characterized in that: The inclination angle α of the guiding inclined surface (311) is greater than 20° and less than 45°.

3. The bearing sealing structure according to claim 1 is characterized in that: The thickness of the sealing portion (330) is gradually reduced along the convex direction.

4. The bearing sealing structure according to claim 1 is characterized in that: The outer circular end surface of the outer ring body (200) is inclined in a direction away from the connecting body (100) to form a guiding inclined surface (230).

5. The bearing sealing structure according to claim 4 is characterized in that: An end of the outer ring body (200) facing away from the accommodating cavity (500) is provided with a deformation notch (220).

6. The bearing sealing structure according to claim 5, characterized in that: The deformation notch (220) is arranged at an angle greater than 90°.

7. A bearing, comprising a bearing inner ring (20) and a bearing outer ring (10), wherein the outer circle of the bearing inner ring (20) is provided with an outer groove (21), and the inner circle of the bearing outer ring (10) is provided with an inner groove (11), wherein: A bearing sealing structure according to any one of claims 1 to 6 is installed between the inner groove (11) and the outer groove (21).

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