Sealed bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a sealed bearing which comprises a bearing inner ring and a bearing outer ring, the bearing inner ring is located in the bearing outer ring, two clamping rings are formed on the outer wall of the bearing inner ring, a limiting ring is arranged on the axial inner side of any clamping ring, a plurality of balls are movably arranged between the two limiting rings, and the balls are arranged on the outer wall of the bearing inner ring. The two axial ends of the bearing outer ring are respectively in threaded connection with a sealing ring, a sealing block is formed at the inner diameter position of any sealing ring, the sealing block is embedded into the inner side of the clamping ring to be fixed, and a sealing cover and a filling gasket are arranged between the two sealing rings. The bearing outer ring is in threaded connection with the sealing ring, the sealing block is formed in the bearing inner ring and clamped with the clamping ring, so that the bearing outer ring and the bearing inner ring are in sealed connection, the sealing structure is located in the sealing ring and does not make contact with external equipment, and the sealing stability is high; and the sealing cover is arranged to shield a connecting gap between the bearing outer ring and the external bearing seat, so that the sealing performance is high.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of bearings, in particular to a sealed bearing. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. my country's bearing industry has developed rapidly, with a wide variety of bearings, low product quality and technical level, and a small to large industry scale. A professional production system with a complete range of products and a relatively reasonable production layout has been formed.

[0003] The prior art achieves a sealed connection by filling a rubber ring between the bearing inner ring and the bearing outer ring, and the inner wall and the outer wall of the rubber ring are elastically pressed against the bearing inner ring and the bearing outer ring respectively. However, in this sealing method, the rubber ring is directly exposed to the outside and is easily cut and damaged by the external structure during use. The sealing stability is low. After the bearing is fixed on the external bearing seat, there is a connecting gap between the bearing outer ring and the external bearing seat. External dust can easily enter the bearing through the gap, resulting in poor sealing performance. Utility Model Content

[0004] The utility model aims to provide a sealed bearing to solve the technical problems in the prior art that the sealing structure is easily damaged and has low stability, external dust easily enters the bearing through the gap between the outer ring of the bearing and the external bearing seat, and the sealing performance is poor.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sealed bearing, comprising a bearing inner ring and a bearing outer ring, the bearing inner ring is located inside the bearing outer ring, two clamping rings are formed on the outer wall of the bearing inner ring, a limit ring is arranged on the axial inner side of any one of the clamping rings, a plurality of balls are movably arranged between the two limit rings, a sealing ring is threadedly connected at both axial ends of the bearing outer ring, a sealing block is formed at the inner diameter position of any one of the sealing rings, the sealing block is embedded in the inner side of the clamping ring and is fixed, and a sealing cover and a filling gasket are arranged between the two sealing rings.

[0006] Preferably, external thread sections are formed at both axial ends of the outer wall of the bearing outer ring, a connecting protrusion is formed at the outer diameter position of the sealing ring, and an internal thread section that matches the external thread section is formed on the inner wall of the connecting protrusion. The outer ring of the bearing and the sealing ring are sealed by threaded connection between the external thread section and the internal thread section.

[0007] Furthermore, the sealing cover is a truncated cone-shaped hollow cover, and the upper surface of the sealing cover extends radially inward by a certain length to form an extended end, the length of the extended end is the same as the distance between the inner and outer walls of the connecting protrusion, and the bottom of the outer ring of the bearing is shielded by the sealing cover.

[0008] Furthermore, the filling gasket is an annular rubber sleeve, the ring diameter of the filling gasket is the same as the distance between the inner and outer walls of the connecting protrusion, the length of the filling gasket is equal to the distance between the two sealing rings minus the thickness of the extended end of the sealing cover, and the filling gasket is used to limit the axial sliding of the sealing cover along the outer ring of the bearing.

[0009] Preferably, any one of the balls is located between the inner ring of the bearing and the outer ring of the bearing, and the diameter of the ball is equal to the distance between the inner ring of the bearing and the outer ring of the bearing, and the friction between the two during rotation is reduced by placing the ball against the inner ring of the bearing and the outer ring of the bearing respectively.

[0010] Preferably, the sealing block is an annular rubber block, the body of the sealing block is buckled between the clamping ring and the limiting ring, the two sides of the sealing block are respectively tightly against the clamping ring and the limiting ring, and the inner ring of the bearing and the sealing ring are sealed by the clamping setting between the sealing block and the clamping ring and the limiting ring.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The outer ring of the bearing is connected to the sealing ring through threads, and a sealing block is formed inside the inner ring of the bearing and clamped with the clamping ring, so as to realize the sealed connection between the outer ring of the bearing and the inner ring of the bearing. The sealing structure is located inside the sealing ring and does not contact with external equipment, and the sealing stability is strong. A sealing cover is provided to cover the connection gap between the outer ring of the bearing and the external bearing seat, and the sealing performance is strong.

[0013] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present invention and other related contents, and shall not be considered as limitations of the present invention.

[0015] In the drawings of the specification:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 It is an exploded schematic diagram of the overall structure of the utility model;

[0019] Figure 4 It is an enlarged view of the structure at A of the utility model;

[0020] Figure 5 This is a schematic diagram of the sealing ring clamping the inner ring of the bearing of the utility model;

[0021] Reference numerals:

[0022] 1. Bearing inner ring; 11. Snap ring; 12. Limit ring; 2. Bearing outer ring; 21. External thread section; 3. Sealing ring; 31. Internal thread section; 32. Sealing block; 33. Connecting protrusion; 4. Filling gasket; 5. Sealing cover; 6. Ball. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Example 1

[0024] like Figures 1 to 5 As shown, a sealed bearing comprises a bearing inner ring 1 and a bearing outer ring 2, wherein the bearing inner ring 1 is located inside the bearing outer ring 2, and two clamping rings 11 are formed on the outer wall of the bearing inner ring 1, and a limiting ring 12 is arranged on the axial inner side of any one of the clamping rings 11, and twelve balls 6 are movably arranged along the outer wall of the ring between the two limiting rings 12, and any one of the balls 6 is located between the bearing inner ring 1 and the bearing outer ring 2, and the diameter of the ball 6 is equal to the distance between the bearing inner ring 1 and the bearing outer ring 2, and a sealing ring 3 is threadedly connected to the two axial ends of the bearing outer ring 2, and a sealing block 32 is fixed at the inner diameter position of any one of the sealing rings 3, and the sealing block 32 is embedded in the inner side of the clamping ring 11 and fixed, and a sealing cover 5 and a filling gasket 4 are arranged between the two sealing rings 3.

[0025] External thread sections 21 are formed at the axial ends of the outer side wall of the bearing outer ring 2, a connecting protrusion 33 is formed at the outer diameter position of the sealing ring 3, and an internal thread section 31 is formed on the inner side wall of the connecting protrusion 33, and the thread length, thread radius, and thread spacing are all matched with the external thread section 21. The threaded sealing is performed between the bearing outer ring 2 and the sealing ring 3 by threaded connection between the external thread section 21 and the internal thread section 31.

[0026] The sealing cover 5 is a truncated cone-shaped hollow cover, and the upper surface of the sealing cover 5 extends radially inward for a certain length to form an extended end, and the length of the extended end is the same as the distance between the inner and outer walls of the connecting protrusion 33. The filling gasket 4 is an annular rubber sleeve, and the ring diameter of the filling gasket 4 is the same as the distance between the inner and outer walls of the connecting protrusion 33. The length of the filling gasket 4 is equal to the distance between the two sealing rings 3 minus the thickness of the extended end of the sealing cover 5. The filling gasket limits the sealing cover from sliding axially along the outer ring of the bearing so that the sealing cover covers the bottom of the outer ring of the bearing.

[0027] The sealing block 32 is an annular rubber block, and an accommodating space is formed between the clamping ring 11 and the limiting ring 12. The ring body of the sealing block 32 is elastically squeezed and deformed along the axial direction and buckled into the accommodating space. The sealing block 32 elastically recovers and presses against the clamping ring 11 and the limiting ring 12 on both sides respectively. The clamping setting between the sealing block 32 and the clamping ring 11 and the limiting ring 12 elastically seals the inner ring 1 of the bearing and the sealing ring 3.

[0028] The implementation principle of Example 1 of the present application is as follows: when the product is in use, the sealing block 32 at the inner diameter position of the sealing ring 3 is elastically buckled between the clamping ring 11 and the limiting ring 12, and the sealing block 32 is blocked by the sealing ring 3. The inner wall of the connecting protrusion 33 at the outer diameter position of the sealing ring 3 forms an internal thread section 31 and is threadedly connected to the external thread section 21 on the bearing outer ring 2, and the internal thread section 31 is blocked by the sealing ring 3. The sealing connection structure between the sealing ring 3 and the bearing inner ring 1 and the bearing outer ring 2 is located inside the sealing ring 3 and is not exposed to the outside. It is not easy to be damaged without contact with external equipment. After the product is fixed on the external bearing seat, the lower table of the sealing cover 5 contacts the ground to cover the external bearing seat and the bearing outer ring 2 in the sealing cover 5, so as to protect the connection gap between the external bearing seat and the bearing outer ring 2.

[0029] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A sealed bearing, comprising a bearing inner ring (1) and a bearing outer ring (2), wherein the bearing inner ring (1) is located inside the bearing outer ring (2), and characterized in that: Two clamping rings (11) are formed on the outer wall of the bearing inner ring (1), a limiting ring (12) is arranged on the axial inner side of any one of the clamping rings (11), and a plurality of balls (6) are movably arranged between the two limiting rings (12). A sealing ring (3) is threadedly connected to each of the two axial ends of the bearing outer ring (2), a sealing block (32) is fixed at the inner diameter position of any one of the sealing rings (3), and the sealing block (32) is embedded in the inner side of the clamping ring (11) and fixed, and a sealing cover (5) and a filling gasket (4) are arranged between the two sealing rings (3).

2. A sealed bearing according to claim 1, characterized in that: External thread sections (21) are formed at both axial ends of the outer side wall of the bearing outer ring (2), a connecting protrusion (33) is formed at the outer diameter position of the sealing ring (3), and an internal thread section (31) that fits with the external thread section (21) is formed on the inner side wall of the connecting protrusion (33).

3. A sealed bearing according to claim 2, characterized in that: The sealing cover (5) is a truncated cone-shaped hollow cover, and the upper surface of the sealing cover (5) extends radially inwards for a certain length to form an extended end, and the length of the extended end is the same as the distance between the inner and outer walls of the connecting protrusion (33).

4. A sealed bearing according to claim 3, characterized in that: The filling gasket (4) is an annular rubber sleeve, the ring diameter of the filling gasket (4) is the same as the distance between the inner and outer walls of the connecting protrusion (33), and the length of the filling gasket (4) is equal to the distance between the two sealing rings (3) minus the thickness of the extended end of the sealing cover (5).

5. A sealed bearing according to claim 1, characterized in that: Any one of the balls (6) is located between the bearing inner ring (1) and the bearing outer ring (2), and the diameter of the ball (6) is equal to the distance between the bearing inner ring (1) and the bearing outer ring (2).

6. A sealed bearing according to claim 1, characterized in that: The sealing block (32) is an annular rubber block, the body of the sealing block (32) is buckled between the clamping ring (11) and the limiting ring (12), and the two sides of the sealing block (32) are respectively tightly against the clamping ring (11) and the limiting ring (12).

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