Bearing structure with improved dustproof cover

Abstract

The utility model relates to the technical field of bearings, in particular to a bearing structure with an improved dust cover, which comprises a bearing outer ring, a bearing inner ring, a rolling body, a fixing frame and a bearing dust cover, the bearing dust cover comprises an outermost curled edge, the inner side of the curled edge is connected with a clamping part, the inner side of the clamping part is connected with an inner folding part, and the inner folding part is connected with the rolling body. The inner side of the inner folding part is connected with an outer slope part, the inner side of the outer slope part is connected with a protruding part, the inner side of the protruding part is connected with a jaw part, and the outer clamping groove is formed in the side face of the bearing outer ring so that the bearing dust cover can be installed on the two sides of the bearing through the clamping part; a dustproof cover of the bearing can be conveniently and losslessly taken down through hemming when the bearing needs to be maintained, through the design of an outer slope part and a protruding part, lubricating grease can be prevented from leaking, a rolling body can be fully lubricated, and more space for storing the lubricating grease can be provided; and a better dustproof effect can be realized under the condition that the rotation of the bearing is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a bearing structure with an improved dust cover. Background Technique

[0002] Bearings are essential parts for the high-speed rotating parts of various equipment in modern industry. However, when working in a harsh environment, impurities entering the bearing will greatly reduce the service life of the bearing. The dust cover can protect the inside of the bearing to prevent impurities from entering. The commonly used metal dust cover is installed in a non-contact manner, and the cover has the advantages of not affecting the rotation speed and being heat-resistant. However, there are also problems such as general dust-proof effect, easy leakage of grease, and the need to disassemble violently and cannot be used continuously when the inside of the bearing needs to be maintained after installation. For this reason, we propose a bearing structure with an improved dust cover. Content of the Utility Model

[0003] The purpose of the utility model is to provide a bearing structure with an improved dust cover to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a bearing structure with an improved dust cover, including an outer bearing ring, an inner bearing ring, rolling elements, a fixing frame and a bearing dust cover. The bearing dust cover includes a rolled edge on the outermost side. An engaging portion is connected to the inner side of the rolled edge. An inwardly folded portion is connected to the inner side of the engaging portion. An outer ramp portion is connected to the inner side of the inwardly folded portion. A protruding portion is connected to the inner side of the outer ramp portion. A tiger mouth portion is connected to the inner side of the protruding portion.

[0005] Among them, an outer raceway is opened in the middle of the inner side of the outer bearing ring. Outer dust-proof grooves are opened at both ends of the inner side of the outer bearing ring. Outer clamping grooves are opened in the middle of both ends of the outer bearing ring.

[0006] Among them, an inner raceway is opened in the middle of the outer side of the inner bearing ring. Inner dust-proof grooves are opened at both ends of the middle of the inner bearing ring. Inner clamping grooves are opened at both ends of the outer side of the inner bearing ring.

[0007] Among them, the inner diameter tolerance of the outer clamping groove is less than the outer diameter tolerance of the engaging portion. The outer clamping groove and the engaging portion are connected by interference fit. The inwardly folded portion is in close fit with the outer dust-proof groove.

[0008] Among them, the slotting tolerance of the inner clamping groove is greater than the thickness of the tiger mouth portion. The inner clamping groove and the tiger mouth portion are in clearance fit, and the clearance between the inner clamping groove and the tiger mouth portion is less than 0.1 mm.

[0009] Among them, one side of the inner dust-proof groove inclines inward, and the included angle between the two groove sides of the inner dust-proof groove is greater than or equal to the included angle between the bottom groove side of the inner dust-proof groove and the tiger mouth portion.

[0010] Wherein, when the bearing dust cover is installed on the bearing outer ring, a labyrinth-like gap is formed between the inner dust groove, the inner clamping groove and the tiger's mouth.

[0011] The utility model has at least the following beneficial effects:

[0012] The utility model discloses that when in use, by arranging the outer groove on the side of the bearing outer ring, the bearing dust cover can be installed on both sides of the bearing through the clamping part, and when the bearing needs to be maintained, the bearing dust cover can be conveniently and non-destructively removed through the crimping edge, and the design of the outer slope part and the protruding part can not only prevent the leakage of grease, but also keep the rolling element fully lubricated and provide more space for storing grease, and the cooperation among the dustproof groove, the inner groove and the tiger's mouth part can achieve better dustproof effect without affecting the rotation of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structural section of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of the outer ring and inner ring of the bearing of the utility model;

[0015] Figure 3 This is a cross-sectional schematic diagram of the utility model bearing dust cover;

[0016] Figure 4 This is a schematic diagram of the overall exterior of the utility model;

[0017] In the figure: 1. outer ring of bearing; 11. outer raceway; 12. outer dustproof groove; 13. outer clamping groove; 2. inner ring of bearing; 21. inner raceway; 22. inner dustproof groove; 23. inner clamping groove; 3. rolling element; 4. fixing frame; 5. bearing dust cover; 51. curling edge; 52. clamping part; 53. inner folding part; 54. outer slope part; 55. protruding part; 56. tiger's mouth part. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1

[0020] See also Figures 1 to 4, the present utility model provides a technical solution: an improved bearing structure with a dust cover, including a bearing outer ring 1, a bearing inner ring 2, rolling elements 3, a fixing frame 4 and a bearing dust cover 5. The bearing outer ring 1 has an outer raceway 11 opened in the middle of the inner side, outer dust grooves 12 opened at both ends of the inner side, and outer clamping grooves 13 opened in the middle of both ends. The bearing inner ring 2 has an inner raceway 21 opened in the middle of the outer side, inner dust grooves 22 opened at both ends of the middle, and inner clamping grooves 23 opened at both ends of the outer side. The bearing dust cover 5 includes a rolled edge 51 at the outermost side, a clamping portion 52 connected to the inner side of the rolled edge 51, an inner folded portion 53 connected to the inner side of the clamping portion 52, an outer slope portion 54 connected to the inner side of the inner folded portion 53, a protruding portion 55 connected to the inner side of the outer slope portion 54, and a tiger mouth portion 56 connected to the inner side of the protruding portion 55. When it is necessary to maintain the inside of the bearing, the staff can hold the rolled edges 51 at both ends of the bearing dust cover with their fingers and remove the bearing dust cover 5 to facilitate the internal maintenance work. When installing the bearing dust cover 5, the clamping portion 52 below the rolled edge 51 is aligned with the outer clamping groove 13 and pressed into it forcefully. The inner diameter tolerance of the outer clamping groove 13 is smaller than the outer diameter tolerance of the clamping portion 52, so that a tight connection is achieved between the outer clamping groove 13 and the clamping portion 52 through interference fit. The inner folded portion 53 is closely attached to the outer dust groove 12 to prevent the lubricating grease inside the bearing from leaking to the outside through the gap. The setting of the outer slope portion 54 enables the lubricating grease thrown onto the protruding portion 55 during the high-speed rotation of the bearing 5 to move along the outer slope portion 54 towards the rolling elements 3 under the action of centrifugal force, which can not only prevent the lubricating grease from leaking but also keep the rolling elements 3 fully lubricated. At the same time, the outer slope portion 54 tilts outwards, which can make the protruding portion 55 protrude outwards, providing more space to store the lubricating grease. The design that the tiger mouth portion 56 tilts towards the bearing can reduce the possibility of lubricating grease leakage. The slotting tolerance of the inner clamping groove 23 is larger than the thickness of the tiger mouth portion 56, and the inner clamping groove 23 and the tiger mouth portion 56 adopt clearance fit. The gap between the inner clamping groove 23 and the tiger mouth portion 56 is less than 0.1 mm, and there are labyrinthine gaps between the inner dust groove 22, the inner clamping groove 23 and the tiger mouth portion 56, so as to achieve a better dust-proof effect without affecting the rotation of the bearing.

[0021] Embodiment 2

[0022] In this Embodiment 2, other structures remain unchanged. Different from Embodiment 1, one side of the inner dust groove 22 inclines inwards, and the included angle between the two groove sides of the inner dust groove 22 is greater than or equal to the included angle between the bottom groove side of the inner dust groove 22 and the tiger mouth portion 56. By adopting this design, when the bearing rotates at a high speed, the dust outside and inside the inner dust groove 22 will be thrown towards the hypotenuse part of the tiger mouth portion 56, so as to be thrown away from the bearing to achieve a better dust-proof effect.

[0023] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An improved bearing structure with a dust cover, comprising an outer bearing ring (1), an inner bearing ring (2), rolling elements (3), a cage (4), and a bearing dust cover (5), characterized in that: The bearing dust cover (5) includes an outermost crimping edge (51). An engaging portion (52) is connected to the inner side of the crimping edge (51). An inner folding portion (53) is connected to the inner side of the engaging portion (52). An outer slope portion (54) is connected to the inner side of the inner folding portion (53). A protruding portion (55) is connected to the inner side of the outer slope portion (54). A tiger mouth portion (56) is connected to the inner side of the protruding portion (55).

2. The bearing structure with an improved dust cover according to claim 1, characterized in that: An outer raceway (11) is formed in the middle of the inner side of the bearing outer ring (1). Outer dust-proof grooves (12) are formed at both ends of the inner side of the bearing outer ring (1). Outer clamping grooves (13) are formed in the middle of both ends of the bearing outer ring (1).

3. The bearing structure with an improved dust cover according to claim 1, characterized in that: An inner raceway (21) is formed in the middle of the outer side of the bearing inner ring (2). Inner dust-proof grooves (22) are formed at both ends of the middle of the bearing inner ring (2). Inner clamping grooves (23) are formed at both ends of the outer side of the bearing inner ring (2).

4. The improved bearing structure with a dust cover according to claim 2, characterized in that: The inner diameter tolerance of the outer clamping groove (13) is smaller than the outer diameter tolerance of the engaging portion (52). The outer clamping groove (13) and the engaging portion (52) are connected by interference fit. The inner folding portion (53) is in close fit with the outer dust-proof groove (12).

5. The improved bearing structure of the dust cover according to claim 3, characterized in that: The slotting tolerance of the inner clamping groove (23) is larger than the thickness of the tiger mouth portion (56). The inner clamping groove (23) and the tiger mouth portion (56) are in clearance fit. The clearance between the inner clamping groove (23) and the tiger mouth portion (56) is less than 0.15 mm.

6. The bearing structure with an improved dust cover according to claim 3, characterized in that: One side of the inner dust-proof groove (22) inclines inward, and the included angle between the two groove sides of the inner dust-proof groove (22) is greater than or equal to the included angle between the bottom groove side of the inner dust-proof groove (22) and the tiger mouth portion (56).

7. The improved bearing structure of the dust cover according to claim 3, characterized in that: When the bearing dust cover (5) is installed on the bearing outer ring (1), there is a labyrinth gap among the inner dust-proof groove (22), the inner clamping groove (23) and the tiger mouth portion (56).

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