A sealing structure for a bearing

Abstract

The utility model discloses a kind of sealing structure of bearing, including bearing body, the inner ring and outer ring of bearing body are sleeved with sealing assembly between;The sealing assembly includes respectively with the outer sealing element and inner sealing element of inner ring and outer ring sleeve connection, the inner side wall of outer sealing element is recessed with sleeve connection groove, inner sealing element is sleeved in sleeve connection groove and forms sealing leakproof structure between sleeve connection groove;The adjacent surface of outer sealing element and inner ring outer wall is also connected and is equipped with multiple groups of sealing lip.The utility model has the advantages compared with prior art: provide a kind of sealing structure of bearing, with good adaptability, guarantee sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of bearing sealing technology, specifically to a bearing sealing structure. Background Technology

[0002] Bearings are core components in mechanical transmissions, and their sealing performance directly affects operational stability and service life. In existing bearing sealing structures, contact seals rely on the contact between the sealing lip and the journal to achieve sealing. However, wear, temperature changes, or shaft runout can easily lead to insufficient sealing lip contact pressure, resulting in grease leakage or impurity intrusion.

[0003] Non-contact seals, due to their gap design, have poor sealing performance and are difficult to adapt to harsh environments such as dust and moisture. Utility Model Content

[0004] (I) Problems to be solved

[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a bearing sealing structure that ensures sealing effect and has good adaptability.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a sealing structure for a bearing, including a bearing body, wherein a sealing component is sleeved between the inner ring and the outer ring of the bearing body;

[0008] The sealing assembly includes an outer sealing element and an inner sealing element that are respectively fitted to the inner ring and the outer ring. The inner sidewall of the outer sealing element is recessed with a fitting groove, and the inner sealing element is fitted into the fitting groove to form a sealing and leak-proof structure.

[0009] The outer seal and the adjacent surface of the inner ring outer wall are also provided with multiple sets of sealing lips.

[0010] As an improvement, the inner wall of the outer ring is recessed with a sealing groove, and the end of the inner seal is protruding with an outer edge that fits into the sealing groove.

[0011] A spiral spring is also embedded in the outer edge along its circumference.

[0012] As an improvement, a stress plate is also fitted inside the inner seal, and a stress groove is formed on the inner ring of the stress plate. The inner seal is configured to form a grooved section in conjunction with the stress plate.

[0013] As an improvement, a stress plate is also fitted inside the inner seal, and a stress groove is formed on the inner ring of the stress plate. The inner seal is configured to form a grooved section in conjunction with the stress plate.

[0014] As an improvement, the sealing and leak-proof structure includes a number of protrusions connected between the inner wall of the sleeve groove and the inner sealing element, with the protrusions arranged alternately.

[0015] (III) Beneficial Effects

[0016] The advantages of this utility model compared with the prior art are as follows: the spiral spring embedded in the outer edge of the inner seal in this application can continuously provide radial preload, compensate for the gap caused by wear, temperature deformation or shaft runout of the seal, ensure stable fit between the seal and the outer ring groove, and extend the sealing life.

[0017] The stress-curved groove design enhances the structural strength and elastic deformation capacity of the seal, increases the sealing effect with the outer seal, and presses against the outer seal to increase the sealing effect of the sealing lip. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a bearing sealing structure.

[0019] Figure 2 This is a schematic diagram of the cross-sectional view of a bearing's sealing structure.

[0020] Figure 3 This is a partial structural schematic diagram of the enlarged sealing structure of a bearing.

[0021] As shown in the figure: 1. Bearing body; 2. Outer seal; 3. Inner seal; 4. Sleeve groove; 5. Sealing lip; 6. Sealing groove; 7. Outer edge; 8. Scroll spring; 9. Stress plate; 10. Stress bend; 11. Protruding foot. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0023] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] Please refer to the appendix carefully. Figure 1-3 A sealing structure for a bearing includes a bearing body 1, wherein a sealing assembly is sleeved between the inner ring and the outer ring of the bearing body 1.

[0028] Specifically:

[0029] The sealing assembly includes an outer sealing element 2 and an inner sealing element 3 that are respectively fitted to the inner ring and the outer ring. The inner sidewall of the outer sealing element 2 is recessed with a fitting groove 4, and the inner sealing element 3 is fitted into the fitting groove 4 to form a sealing and leak-proof structure.

[0030] The outer seal 2 is also connected to the adjacent surface of the inner ring outer wall with multiple sets of sealing lips 5.

[0031] The inner wall of the outer ring is recessed with a sealing groove 6, and the end of the inner sealing element 3 is protruding with an outer edge 7 that fits into the sealing groove 6; a spiral spring 8 is also embedded in the outer edge 7 along its circumferential direction, and a stress plate 9 is also embedded in the inner sealing element 3. The inner ring of the stress plate 9 forms a stress bending groove 10, and the inner sealing element 3 is configured to form a bending groove section in cooperation with the stress plate 9.

[0032] The sealing lip 5 has a trapezoidal cross section and multiple sets are provided along the thickness direction of the outer sealing element 2. The sealing and leak-proof structure includes several protrusions 11 connected between the inner wall of the sleeve groove 4 and the inner sealing element 3, and the several protrusions 11 are arranged alternately.

[0033] In specific implementation, this utility model

[0034] The sealing assembly consists of an outer seal and an inner seal. The outer seal is made of oil-resistant rubber, and its inner sidewall is recessed inward to form an annular socket groove. The inner seal is made of an elastic metal skeleton and rubber composite, and its main body is fitted into the socket groove 2 and fits tightly with the inner wall of the socket groove.

[0035] The outer seal has multiple sealing lips integrally formed on the side facing the inner ring. The cross-section of the sealing lips is trapezoidal and they are distributed at intervals along the thickness direction of the outer seal (for example, 3 sets). Their free ends are in elastic contact with the outer wall of the inner ring to form a contact seal.

[0036] The staggered protrusions create a labyrinthine network of channels. When small amounts of grease or impurities attempt to pass through the socket gap, the staggered protrusions lengthen the leakage path and create a throttling effect, preventing the flow of the medium.

[0037] When the bearing vibrates or the temperature changes, the stress plate made of metal can absorb stress through elastic deformation of the stress groove and the groove section, while enhancing the tightness of its fit with the sleeve groove.

[0038] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A sealing structure for a bearing, comprising a bearing body (1), characterized in that: A sealing assembly is fitted between the inner and outer rings of the bearing body (1); The sealing assembly includes an outer sealing element (2) and an inner sealing element (3) that are respectively fitted to the inner ring and the outer ring. The inner sidewall of the outer sealing element (2) is recessed with a fitting groove (4). The inner sealing element (3) is fitted into the fitting groove (4) and forms a sealing and leak-proof structure between the inner sealing element (3) and the fitting groove (4). The outer sealing element (2) is also provided with multiple sets of sealing lips (5) on the adjacent surface of the inner ring outer wall; The inner sealing element (3) is also fitted with a stress plate (9), and the inner ring of the stress plate (9) is formed with a stress groove (10). The inner sealing element (3) is configured with a groove section in cooperation with the stress plate (9). The sealing and leak-proof structure includes a number of protrusions (11) connected between the inner wall of the sleeve groove (4) and the inner sealing element (3), and the number of protrusions (11) are staggered.

2. The sealing structure of a bearing according to claim 1, characterized in that: The inner wall of the outer ring is recessed with a sealing groove (6), and the end of the inner sealing member (3) is protruding with an outer edge (7) that fits into the sealing groove (6). A spiral spring (8) is also embedded in the outer edge (7) along its circumference.

3. The sealing structure of a bearing according to claim 1, characterized in that: The sealing lip (5) has a trapezoidal cross section and multiple sets are provided along the thickness direction of the outer seal (2).

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