Sealed bearing

Abstract

The utility model provides a sealed bearing which comprises an inner ring, an outer ring, a ball located between the inner ring and the outer ring and a retainer sleeved on the outer side of the ball, the outer side of the inner ring is movably sleeved with a fixing sleeve, the outer side of the fixing sleeve is fixedly connected with a check ring located between the inner ring and the outer ring, one side of the check ring is fixedly connected with a first pressure plate, and the other side of the check ring is fixedly connected with a second pressure plate. A first sealing gasket arranged on the inner side of the outer ring in a sleeving mode is fixedly arranged between the check ring and the first pressing disc in a sleeving mode, and a second pressing disc located on the inner side of the first pressing disc is fixedly connected to one side of the check ring. The retainer ring can be radially limited through the fixing sleeve, and meanwhile, the first sealing gasket and the second sealing gasket cannot generate radial jumping, so that the radial abrasion to the first sealing gasket and the second sealing gasket is reduced; and a gap between the inner ring and the outer ring can be shielded and sealed through cooperation of the check ring, the first sealing gasket and the second sealing gasket, and external dust is prevented from entering the inner side of the bearing.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and specifically discloses a sealed bearing. Background Technology

[0002] Sealed bearings mainly consist of an inner ring, an outer ring, balls, a cage, a retaining ring, and a gasket. The cooperation between the gasket and the retaining ring prevents the leakage of internal grease and prevents external dust from entering the bearing. However, the retaining rings installed in existing sealed bearings lack radial restraint between the inner and outer rings, which makes them prone to runout. This leads to severe localized wear of the gasket on the retaining ring, thereby reducing the sealing performance and service life of the gasket. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a sealed bearing, including an inner ring and an outer ring, balls located between the inner ring and the outer ring, and a cage fitted outside the balls. A fixed sleeve is movably sleeved on the outer side of the inner ring, and a retaining ring located between the inner ring and the outer ring is fixedly connected to the outer side of the fixed sleeve. A first pressure plate is fixedly connected to one side of the retaining ring, and a first sealing gasket fitted inside the outer ring is fixedly fitted between the retaining ring and the first pressure plate. A second pressure plate located inside the first pressure plate is fixedly connected to one side of the retaining ring, and a second sealing gasket fitted outside the inner ring is fixedly fitted between the retaining ring and the second pressure plate. An annular plate is fixedly connected to the other side of the retaining ring.

[0004] Preferably, the outer side of the annular plate is provided with a ring of equally spaced clamping plates that are snapped onto the inner side of the outer ring.

[0005] Preferably, the inner side of the outer ring is provided with an annular groove that matches the card plate, and the inner side of the outer ring is provided with a chamfer.

[0006] Preferably, the retaining ring, the first pressure plate, and the second pressure plate are all fitted with the inner ring and the outer ring using clearance fit.

[0007] The advantages of this utility model are as follows:

[0008] 1. This sealed bearing, through the fixing sleeve, can radially limit the retaining ring while preventing the first and second sealing gaskets from radially running, thereby reducing radial wear on the first and second sealing gaskets. Furthermore, the cooperation between the retaining ring and the first and second sealing gaskets can seal the gap between the inner and outer rings, preventing external dust from entering the inner side of the bearing.

[0009] 2. This sealed bearing, through the cooperation of the retaining plate and the annular groove, can axially limit the retaining ring, making it less prone to axial displacement, thereby reducing axial wear on the first and second sealing gaskets and improving their service life. Attached Figure Description

[0010] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0011] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0012] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A;

[0013] Figure 3 This is a schematic diagram of the structure of this utility model;

[0014] Figure 4 This is a partial schematic diagram of the structure of this utility model.

[0015] In the diagram: 1. Inner ring; 2. Outer ring; 3. Ball bearing; 4. Cage; 5. Fixing sleeve; 6. Retaining ring; 7. First pressure plate; 8. First sealing gasket; 9. Second pressure plate; 10. Second sealing gasket; 11. Annular plate; 12. Clamping plate; 13. Annular groove; 14. Chamfer. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0017] The accompanying drawings in this utility model embodiment: different types of cross-sectional lines in the drawings are not labeled according to national standards, nor do they specify the material requirements of the components. They are used to distinguish the cross-sectional views of the components in the drawings.

[0018] Please see Figure 1-4A sealed bearing includes an inner ring 1 and an outer ring 2, balls 3 located between the inner ring 1 and the outer ring 2, and a cage 4 fitted around the balls 3. A fixed sleeve 5 is movably sleeved on the outer side of the inner ring 1. A retaining ring 6 located between the inner ring 1 and the outer ring 2 is fixedly connected to the outer side of the fixed sleeve 5. The retaining ring 6 can be radially positioned by the fixed sleeve 5 to prevent radial runout of the retaining ring 6. A first pressure plate 7 is fixedly connected to one side of the retaining ring 6, and a first sealing gasket 8 fitted inside the outer ring 2 is fixedly fitted between the retaining ring 6 and the first pressure plate 7. The first sealing gasket 8 can block and seal the gap between the retaining ring 6 and the outer ring 2. A second pressure plate 9 located inside the first pressure plate 7 is fixedly connected to one side of the retaining ring 6. A second sealing gasket 10 fitted outside the inner ring 1 is fixedly fitted between the retaining ring 6 and the second pressure plate 9. The second sealing gasket 10 can block and seal the gap between the retaining ring 6 and the inner ring 1. An annular plate 11 is fixedly connected to the other side of the retaining ring 6.

[0019] Among them, the outer side of the annular plate 11 is provided with a ring of equally spaced clamping plates 12 that are snapped into the inner side of the outer ring 2.

[0020] The outer ring 2 has an annular groove 13 on its inner side that is compatible with the retaining plate 12, and the inner side of the outer ring 2 is provided with a chamfer 14. The chamfer 14 can avoid the annular groove 13 while making it easy to insert the retaining plate 12 into the inner side of the annular groove 13 during the movement of the retaining ring 6 along the axial direction of the inner ring 1. At this time, the retaining ring 6 can be axially limited by the cooperation of the retaining plate 12 and the annular groove 13.

[0021] Among them, the retaining ring 6, the first pressure plate 7 and the second pressure plate 9 are all clearance fit with the inner ring 1 and the outer ring 2. This structure makes the retaining ring 6, the first pressure plate 7 and the second pressure plate 9 have a gap in the radial direction with the inner ring 1 and the outer ring 2. When the fixing sleeve 5 is put on the outside of the inner ring 1, the retaining ring 6 can be pushed along the axial direction of the inner ring 1. At this time, the first sealing gasket 8 and the second sealing gasket 10 can be squeezed to the inside of the outer ring 2 and the inner ring 1 respectively, which facilitates the installation of the sealing gasket.

[0022] When installing the sealing gasket, after the fixing sleeve 5 is placed on the outside of the inner ring 1, the retaining ring 6 is pushed along the axial direction of the inner ring 1. When the first sealing gasket 8 and the second sealing gasket 10 come into contact with the outer ring 2 and the inner ring 1, they can deform by compression. As the retaining ring 6 continues to push, the first sealing gasket 8 and the second sealing gasket 10 automatically return to their original shape by the elastic force generated by compression until they are completely inserted into the inner side of the outer ring 2 and the inner ring 1. When the chamfer 14 comes into contact with the retaining plate 12, it will compress the retaining plate 12 and stop moving when the end face of the retaining ring 6 comes into contact with the inner ring 1 and the outer ring 2. At this time, the retaining plate 12 resets by the elastic force generated by compression and automatically inserts into the inner side of the annular groove 13, thus completing the installation of the sealing gasket. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A sealed bearing comprising an inner ring (1) and an outer ring (2) and balls (3) located between the inner ring (1) and the outer ring (2) and a cage (4) fitted outside the balls (3), characterized in that: The outer side of the inner ring (1) movably sleeves a fixing sleeve (5), the outer side of the fixing sleeve (5) is fixedly connected with a retaining ring (6) located between the inner ring (1) and the outer ring (2), one side of the retaining ring (6) is fixedly connected with a first pressing disc (7), and the retaining ring (6) and the first pressing disc (7) are fixedly sleeved with a first sealing gasket (8) sleeved on the inner side of the outer ring (2), one side of the retaining ring (6) is fixedly connected with a second pressing disc (9) located on the inner side of the first pressing disc (7), and the retaining ring (6) and the second pressing disc (9) are fixedly sleeved with a second sealing gasket (10) sleeved on the outer side of the inner ring (1), and the other side of the retaining ring (6) is fixedly connected with an annular plate (11).

2. A sealed bearing according to claim 1, wherein: The outer side of the annular plate (11) is provided with annular clamping plates (12) which are equally spaced and clamped on the inner side of the outer ring (2).

3. A sealed bearing according to claim 2, wherein: The inner side of the outer ring (2) is provided with an annular clamping groove (13) matched with the clamping plate (12), and the inner side of the outer ring (2) is provided with a chamfer (14).

4. A sealed bearing according to claim 1, wherein: The retaining ring (6), the first pressing disc (7) and the second pressing disc (9) are all gap-connected with the inner ring (1) and the outer ring (2).

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