Spring steel framework thin-wall bearing sealing ring

Abstract

The utility model discloses a spring steel framework thin-wall bearing sealing ring which comprises a framework made of spring steel and a rubber ring arranged on the framework. A V-shaped lip abutting against the bearing inner ring is arranged on the inner wall of the rubber ring. An abutting ring is arranged on the outer wall of the rubber ring; a right-angle outer brim is arranged on the side, facing the bearing outer ring, of the abutting ring; annular grooves are formed in the inner walls of the outer rings of the bearings; the right-angle outer eave and the framework abut against the two side walls of the annular groove respectively. The proportion of the rubber ring is increased, and the V-shaped lip abutting against the bearing inner ring is arranged on the inner wall, so that the sealing performance and the elastic compensation capacity are enhanced. And the elastic right-angle outer brim is pressed on the annular groove of the bearing outer ring by the rigid framework, so that the fixing effect of the sealing ring on the bearing is improved. The spring steel material is adopted, stamping is easy, machining and bending are not needed, the production efficiency is high, the framework has elasticity and supporting strength, the sealing ring cannot deform in production and press fitting, and the sealing performance of the bearing can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of bearing sealing rings, and particularly relates to a thin-walled bearing sealing ring with a spring steel skeleton. Background Technology

[0002] The original 68 and 67 thin-walled bearing seal rings used cold-rolled steel plates as the skeleton, which was formed by stamping. The thickness and height of the skeleton were limited by the space constraints of the thin-walled bearing, resulting in poor support strength. This made the seal rings prone to deformation during production and press-fitting, severely impacting the bearing's sealing performance. To address this, thin-walled bearings often use spring steel. This not only simplifies stamping, eliminates the need for bending, and increases production efficiency, but also provides the skeleton with elasticity and support strength, preventing deformation during seal ring production and press-fitting, thus improving the bearing's sealing performance.

[0003] Chinese patent document CN104235189A discloses a sealing ring skeleton structure for an ultra-thin-walled bearing with a constant cross-section. The structure includes a sealing ring and a skeleton. Symmetrical grooves are provided on both sides of the inner surface of the outer ring of the ultra-thin-walled bearing with a constant cross-section. Steps are symmetrically provided on both sides of the outer surface of the inner ring of the ultra-thin-walled bearing with a constant cross-section. The sealing ring is installed between the grooves of the outer ring and the steps of the inner ring, with an interference fit to the grooves of the outer ring and radial contact with the steps of the inner ring, thus providing a sealing function. The skeleton is a rectangular-section, sheet-like hollow cylindrical spring steel structure, with the sealing ring covering the outer side of the skeleton.

[0004] The sealing ring using spring steel as its skeleton structure has a flat skeleton that reduces the overall thickness of the sealing ring. However, since the sealing ring is held onto the bearing by the elasticity of the rubber, the reduced thickness inevitably leads to a decrease in the sealing ring's fixing strength on the bearing. In the aforementioned patented solution, the spring steel skeleton occupies the majority of the sealing ring's cross-section. While this helps increase the structural strength of the sealing ring (i.e., the rubber ring portion) and enhances its installation and fixing effect with the bearing, the relatively small proportion of the elastic rubber ring results in poor elastic deformation capacity of the rubber ring, leading to poor sealing performance and poor elastic compensation capability. Utility Model Content

[0005] To overcome the technical problems of poor sealing effect and weak elastic compensation in existing thin-walled bearing seals with spring steel skeletons, where the rubber ring has a small proportion to ensure connection strength with the bearing, this invention aims to provide a spring steel skeleton thin-walled bearing seal that not only increases the proportion of the rubber ring but also features a V-shaped lip on the inner wall of the skeleton that abuts against the inner ring of the bearing, enhancing sealing performance and elastic compensation. A right-angled outer edge is provided on the outer wall of the skeleton, pressing the right-angled outer edge tightly into the annular groove of the outer ring of the bearing, thus utilizing the rigidity of the skeleton to enhance the sealing effect of the seal on the bearing.

[0006] To achieve the above objectives, this utility model employs the following technical solution: a thin-walled bearing seal ring with a spring steel skeleton, comprising a skeleton made of spring steel and a rubber ring disposed on the skeleton; the inner wall of the rubber ring is provided with a V-shaped lip that abuts against the inner ring of the bearing, the opening of the V-shaped lip facing away from the bearing rollers; the outer wall of the rubber ring is provided with an abutment ring, the abutment ring being located on the side of the skeleton away from the bearing rollers; wherein, the outer wall of the abutment ring is provided with a right-angled outer edge on the outer periphery of the skeleton; the inner wall of the outer ring of the bearing is provided with an annular groove; the right-angled outer edge and the skeleton abut against two opposite side walls of the annular groove, respectively.

[0007] In the field of bearing seals, the elasticity of the rubber part is used to snap into the annular groove of the bearing outer ring to achieve fixed installation. However, for thin-walled bearings, the space limitation will inevitably reduce the installation strength. In this utility model, the right-angled outer edge and the skeleton are inserted into the annular groove at the same time, which increases the installation strength.

[0008] Specifically, the skeleton is a flat plate structure, and the width of the skeleton is less than or equal to 1 / 2 of the width of the sealing ring.

[0009] Furthermore, a compensation groove is coaxially provided on the side of the rubber ring facing the bearing roller; the compensation groove is located between the inner wall of the skeleton and the V-shaped lip.

[0010] Specifically, a concave ring is provided on the side of the rubber ring away from the bearing roller; the concave ring is located between the abutment ring and the compensation groove.

[0011] Furthermore, the right-angled outer edge abuts against the inner wall of the annular groove on the side away from the bearing roller; the skeleton abuts against the inner wall of the annular groove on the side near the bearing roller; and the abutment ring is located outside the annular groove.

[0012] Furthermore, the rubber ring has two side overflow rings on the side facing the bearing roller; the two side overflow rings abut against the inner wall and outer wall of the skeleton respectively; the side of the skeleton facing the bearing roller is exposed.

[0013] Furthermore, the thickness of the abutment ring is greater than or equal to the thickness of the skeleton.

[0014] Specifically, the inner bottom end of the compensation groove is located on the side of the skeleton away from the bearing roller.

[0015] Specifically, a connecting block is provided on the side of the rubber ring away from the bearing roller; the connecting block is located between the inner wall of the skeleton and the V-shaped lip; the connecting block is directly opposite the compensation groove.

[0016] Specifically, the side of the connecting block away from the bearing roller is flush with the side of the abutment ring away from the bearing roller.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model increases the proportion of the rubber ring, giving the rubber ring sufficient elastic deformation capacity, and provides a V-shaped lip on the inner wall that abuts against the inner ring of the bearing, thereby enhancing the sealing performance and elastic compensation capacity of the sealing ring.

[0019] 2. This utility model has a right-angled outer edge on the outer periphery of the rubber ring away from the bearing roller. The rigid frame presses the elastic right-angled outer edge tightly onto the annular groove of the bearing outer ring, increasing the fixing effect of the sealing ring on the bearing.

[0020] 3. The skeleton of this utility model is made of spring steel, which is simple to stamp and does not require processing or bending. This not only reduces the thickness of the sealing ring and increases production efficiency, but also provides elasticity and support strength. The sealing ring will not deform during production and pressing, which helps to improve the sealing performance of the bearing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a cross-sectional schematic diagram of a cold-rolled steel sealing ring;

[0023] Figure 3 This is a cross-sectional structural diagram of the present invention in its installed state;

[0024] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0025] In the diagram: 1. Inner ring; 2. Outer ring; 21. Annular groove; 3. Skeleton; 4. Rubber ring; 41. Abutment ring; 411. Right-angled outer edge; 42. V-shaped lip; 421. Connecting block; 43. Concave ring; 44. Compensation groove; 45. Side overflow ring. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are 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 device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, terms such as "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] See Figure 2 This is a cross-sectional schematic diagram of a commonly used bearing seal ring in this field. As shown in the figure, the rubber portion of the seal ring is fitted onto the outer ring of the bearing, and the cold-rolled steel skeleton provides plasticity and support for the rubber portion. However, for thin-walled bearings, the thickness and height of the skeleton are limited by the space of the thin-walled bearing. The skeleton is processed by stamping, resulting in poor support strength. The seal ring is prone to deformation during production and press-fitting, which seriously affects the sealing performance of the bearing.

[0031] See Figure 1 , Figure 3 , Figure 4 A thin-walled bearing seal ring with a spring steel skeleton includes a skeleton 3 made of spring steel and a rubber ring 4 disposed on the skeleton 3; the skeleton 3 has a flat plate structure and the width of the skeleton 3 is less than or equal to 1 / 2 of the width of the seal ring.

[0032] The inner wall of the rubber ring 4 is provided with a V-shaped lip 42 that abuts against the inner ring 1 of the bearing, and the opening of the V-shaped lip 42 faces away from the bearing roller; a compensation groove 44 is coaxially provided on the side of the rubber ring 4 facing the bearing roller; the compensation groove 44 is located between the inner wall of the skeleton 3 and the V-shaped lip 42; the inner bottom end of the compensation groove 44 is located on the side of the skeleton 3 away from the bearing roller.

[0033] The outer wall of the rubber ring 4 is provided with an abutment ring 41, the thickness of which is greater than the thickness of the skeleton 3; the abutment ring 41 is located on the side of the skeleton 3 away from the bearing roller; the outer wall of the abutment ring 41 is provided with a right-angled outer edge 411 on the outer periphery of the skeleton 2; the inner wall of the outer ring 2 of the bearing is provided with an annular groove 21; the right-angled outer edge 411 is located in the annular groove 21. The right-angled outer edge 411 abuts against the inner wall of the annular groove 21 on the side away from the bearing roller; the skeleton 3 abuts against the inner wall of the annular groove 21 on the side closer to the bearing roller; the abutment ring 41 is located on the outside of the annular groove 21.

[0034] Two side overflow rings 45 are provided on the side of the rubber ring 4 facing the bearing roller; the two side overflow rings 45 abut against the inner wall and outer wall of the skeleton 3 respectively; the side of the skeleton 3 facing the bearing roller is exposed. A concave ring 43 is provided on the side of the rubber ring 4 away from the bearing roller; the concave ring 43 is located between the abutment ring 41 and the compensation groove 44; the concave ring 43 is located between the two side overflow rings 45.

[0035] A connecting block 421 is provided on the side of the rubber ring 4 away from the bearing roller; the connecting block 421 is located between the inner wall of the skeleton 3 and the V-shaped lip 42; the connecting block 421 is directly opposite the compensation groove 44. The side of the connecting block 421 away from the bearing roller is flush with the side of the abutment ring 41 away from the bearing roller.

[0036] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A spring steel skeleton thin wall bearing seal ring, characterized in that: The application relates to a spring steel skeleton and a rubber ring arranged on the skeleton, wherein the inner wall of the rubber ring is provided with a V-shaped lip abutting against the inner ring of a bearing, the opening of the V-shaped lip faces away from the bearing roller, the outer wall of the rubber ring is provided with an abutting ring, the abutting ring is located on the side of the skeleton far away from the bearing roller, the outer wall of the abutting ring is provided with a right-angle eave on the outer periphery of the skeleton, the inner wall of the outer ring of the bearing is provided with an annular groove, and the right-angle eave and the skeleton respectively abut against two opposite side walls of the annular groove.

2. The seal ring of claim 1, wherein: The skeleton is in a flat plate type structure, and the width of the skeleton is less than or equal to 1 / 2 of the width of the sealing ring.

3. The seal ring of any one of claims 1-2, wherein: The side of the rubber ring facing the bearing roller is coaxially provided with a compensation groove between the inner wall of the skeleton and the V-shaped lip.

4. The seal ring of claim 3, wherein: The side of the rubber ring far away from the bearing roller is provided with a concave ring between the abutting ring and the compensation groove.

5. The seal ring of any one of claims 1-2, wherein: The right-angle eave abuts against the inner wall of the annular groove far away from the bearing roller, the skeleton abuts against the inner wall of the annular groove close to the bearing roller, and the abutting ring is located outside the annular groove.

6. The seal ring of any one of claims 1-2, wherein: The side of the rubber ring facing the bearing roller is provided with two side overflow rings, the two side overflow rings respectively abut against the inner wall and the outer wall of the skeleton, and the side of the skeleton facing the bearing roller is exposed.

7. The seal ring of any of claims 1-2, wherein: The thickness of the abutting ring is greater than or equal to the thickness of the skeleton.

8. The seal ring of claim 3, wherein: The inner bottom end of the compensation groove is located on the side of the skeleton far away from the bearing roller.

9. The seal ring of claim 3, wherein: The side of the rubber ring far away from the bearing roller is provided with a connecting block, the connecting block is located between the inner wall of the skeleton and the V-shaped lip, and the connecting block is opposite to the compensation groove.

10. The seal ring of claim 9, wherein: The side of the connecting block far away from the bearing roller is flush with the side of the abutting ring far away from the bearing roller.

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