Bearing

Abstract

The utility model discloses a bearing which comprises a bearing inner ring, a bearing outer ring sleeved outside the bearing inner ring, a first ball assembly and a dustproof assembly, the first ball assembly comprises a plurality of first steel balls distributed around the axial circumference of the bearing inner ring, and the dustproof assembly comprises two oppositely arranged dustproof covers. The two dustproof covers are detachably connected to the two end faces of the bearing outer ring respectively, the outer walls of the dustproof covers are matched with the outer wall of the bearing outer ring, the dustproof covers cover the end faces of the bearing inner ring, through holes matched with the inner ring wall of the bearing inner ring are formed in the dustproof covers in a penetrating mode, and movable gaps are formed between the end faces of the bearing inner ring and the dustproof covers. A second ball assembly is arranged in the movable gap and comprises a plurality of second steel balls distributed around the axial circumference of the bearing inner ring. According to the bearing disclosed by the utility model, the inner ring of the bearing is prevented from abrading the dustproof cover when the bearing rotates, so that the dustproof effect of the dustproof cover is ensured, and the service life of the bearing is prolonged.

Description

Technical Field

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

[0002] Bearings are components that fix and reduce the load friction coefficient during mechanical transmission. Bearings generally include an inner ring and an outer ring, with rolling elements arranged between the inner ring and the outer ring. The gap between the inner ring and the outer ring is usually filled with lubricating oil. To prevent debris from entering the bearing and causing the bearing to rotate and become stuck, sealing rings are usually arranged on both sides between the outer ring and the inner ring. However, when the bearing rotates, the relative rotation between the inner ring and the outer ring can easily cause wear on the sealing ring, making it difficult to ensure the dustproof effect, which affects the service life of the bearing. Utility Model Content

[0003] The utility model aims to solve the above-mentioned technical deficiencies and to provide a bearing designed to prevent the inner ring of the bearing from wearing the dust cover when the bearing rotates, thereby ensuring the dustproof effect of the dust cover and prolonging the service life of the bearing.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a bearing, including a bearing inner ring, a bearing outer ring sleeved on the outside of the bearing inner ring, and a first ball assembly arranged between the bearing inner ring and the bearing outer ring, the first ball assembly including a plurality of first steel balls distributed around the axial circumference of the bearing inner ring, and a first retaining frame, and also including a dustproof assembly, the dustproof assembly including two dustproof covers arranged oppositely, the two dustproof covers are respectively detachably connected to the two end surfaces of the bearing outer ring, the outer wall of the dustproof cover is adapted to the outer wall of the bearing outer ring, the dustproof cover covers the end surface of the bearing inner ring, and the dustproof cover is penetrated by a through hole adapted to the inner ring wall of the bearing inner ring, an active gap is formed between the end surface of the bearing inner ring and the dustproof cover, the active gap is provided with a second ball assembly, the second ball assembly includes a plurality of second steel balls distributed around the axial circumference of the bearing inner ring, and a second retaining frame.

[0005] Preferably, an inner groove is formed inwardly on the end face of the inner ring of the bearing, an outer convex portion is formed outwardly on the side wall of the dust cover close to the inner ring of the bearing, the through hole passes through the outer convex portion, the outer convex portion is inserted into the inner groove, and the movable gap is formed between the outer convex portion and the inner groove.

[0006] Preferably, the inner groove includes a horizontally arranged annular surface and an inner conical surface arranged along the edge of the annular surface, and each of the second steel balls is arranged between the inner conical surface and the opposite side of the outer convex portion.

[0007] Preferably, a tapered hole is formed on the inner wall of the through hole away from the inner ring of the bearing, and the inner diameter of the tapered hole gradually decreases in a direction approaching the inner ring of the bearing.

[0008] Preferably, a plurality of fasteners are detachably connected between the dust cover and the corresponding end surface of the bearing outer ring, and the plurality of fasteners are distributed around the axial circumference of the bearing outer ring.

[0009] Preferably, at least one sealing ring is embedded on the end face of the bearing outer ring, the sealing ring is staggered in position from the fastener, and a docking groove for the sealing ring to be inserted is provided on the side wall of the dust cover close to the bearing outer ring, and the sealing ring and the docking groove have an interference fit.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model discloses a bearing, wherein a dust cover is detachably connected to the end surface of the bearing outer ring to cover the gap between the bearing outer ring and the bearing inner ring to prevent debris from entering the gap, an active gap is formed between the end surface of the bearing inner ring and the dust cover to prevent the bearing inner ring from directly contacting the dust cover, and a second ball assembly is arranged in the active gap, so that the bearing outer ring drives the dust cover to rotate relative to the bearing inner ring to avoid the inner ring of the bearing causing wear to the dust cover when the bearing rotates, thereby ensuring the dustproof effect of the dust cover and improving the service life of the bearing, and the lubricating oil filled between the bearing outer ring and the bearing inner ring can lubricate each second ball in the active gap when passing through the active gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the bearing in the embodiment;

[0013] Figure 2 is a schematic diagram of the structure of the dust cover in the embodiment;

[0014] In the figure: 1. bearing inner ring; 2. bearing outer ring; 3. first steel ball; 31. first retaining frame; 4. dust cover; 5. movable gap; 6. second steel ball; 61. second retaining frame; 7. inner groove; 71. annular surface; 72. inner conical surface; 8. through hole; 9. outer convex part; 10. conical hole; 11. fastener; 12. sealing ring; 13. docking groove. DETAILED DESCRIPTION

[0015] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0016] refer to Figure 1 , Figure 2A bearing comprises a bearing inner ring 1, a bearing outer ring 2, a first ball assembly arranged between the bearing inner ring 1 and the bearing outer ring 2, and a dustproof assembly. The bearing inner ring 1 and the bearing outer ring 2 are coaxially arranged, and the bearing outer ring 2 is sleeved on the outside of the bearing inner ring 1. The first ball assembly comprises a plurality of first steel balls 3 distributed axially around the bearing inner ring 1, and a first retaining frame 31. The first steel balls 3 are maintained in an annular array distribution by a first retaining frame 61, so that the bearing outer ring 2 can rotate relative to the bearing inner ring 1.

[0017] The dustproof assembly includes two dustproof covers 4 arranged opposite to each other, and a plurality of fasteners 11 are detachably connected between the dustproof covers 4 and the end faces of the corresponding bearing outer rings 2. The plurality of fasteners 11 are distributed around the axial circumference of the bearing outer ring 2, and the fasteners 11 are bolt structures. The two dustproof covers 4 are detachably connected to the two end faces of the bearing outer ring 2 through the fasteners 11.

[0018] The outer wall of the dust cover 4 is matched with the outer wall of the bearing outer ring 2, and the dust cover 4 covers the end surface of the bearing inner ring 1 to cover the gap between the bearing outer ring 2 and the bearing inner ring 1 to prevent debris from entering the gap.

[0019] An outer convex portion 9 is formed on the middle part of the side wall of the dust cover 4 close to the bearing inner ring 1, and an inner groove 7 is formed on the end face of the bearing inner ring 1. The outer convex portion 9 is inserted into the inner groove 7, and a clearance fit is formed between the outer convex portion 9 of the dust cover 4 and the inner groove 7 on the end face of the bearing inner ring 1, so that a movable gap 5 is formed between the end face of the bearing inner ring 1 and the dust cover 4 to prevent direct contact between the bearing inner ring 1 and the dust cover 4. A second ball assembly is provided in the movable gap 5, and the second ball assembly includes a plurality of second steel balls 6 distributed axially around the bearing inner ring 1, and a second retaining frame 61. Each second steel ball 6 is maintained in a circular array distribution by the second retaining frame 61. The inner groove 7 includes a horizontally arranged annular surface 71 and an inner conical surface 72 arranged along the edge of the annular surface 71. Each second steel ball 6 is arranged between the inner conical surface 72 and the opposite side of the outer protrusion 9, so that the outer ring 2 of the bearing drives the dust cover 4 to rotate relative to the inner ring 1 of the bearing, thereby avoiding the inner ring 1 of the bearing from wearing the dust cover 4 when the bearing rotates, thereby ensuring the dustproof effect of the dust cover 4 and improving the service life of the bearing.

[0020] The outer protrusion 9 of the dust cover 4 is penetrated by a through hole 8 adapted to the inner ring wall of the bearing inner ring 1. A tapered hole 10 is opened on the inner wall of the through hole 8 away from the bearing inner ring 1. The inner diameter of the tapered hole 10 gradually decreases in the direction approaching the bearing inner ring 1, guiding the external shaft to fit with the bearing inner ring 1.

[0021] Two coaxially arranged sealing rings 12 are embedded on the end surface of the bearing outer ring 2. The sealing rings 12 and the fasteners 11 are staggered in position. The fasteners 11 are distributed in the annular area between the two sealing rings 12. The side wall of the dust cover 4 close to the bearing outer ring 2 is provided with a docking groove 13 for the sealing ring 12 to be inserted. The sealing ring 12 and the docking groove 13 have an interference fit, which improves the sealing between the dust cover 4 and the bearing outer ring 2 and prevents the lubricating oil filled between the bearing outer ring 2 and the bearing inner ring 1 from leaking to the edge of the bearing outer ring 2. The lubricating oil filled between the bearing outer ring 2 and the bearing inner ring 1 can lubricate the second balls in the active gap 5 when passing through the active gap 5, thereby improving the utilization rate of the lubricating oil.

[0022] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A bearing, comprising a bearing inner ring (1), a bearing outer ring (2) sleeved outside the bearing inner ring (1), and a first ball assembly arranged between the bearing inner ring (1) and the bearing outer ring (2), the first ball assembly comprising a plurality of first steel balls (3) distributed around the axial circumference of the bearing inner ring (1), and a first retaining frame (31), wherein: The invention also includes a dustproof component, which includes two dustproof covers (4) arranged opposite to each other. The two dustproof covers (4) are detachably connected to the two end surfaces of the bearing outer ring (2), the outer wall of the dustproof cover (4) is matched with the outer wall of the bearing outer ring (2), the dustproof cover (4) covers the end surface of the bearing inner ring (1), and the dustproof cover (4) is penetrated by a through hole (8) matched with the inner ring wall of the bearing inner ring (1), and an active gap (5) is formed between the end surface of the bearing inner ring (1) and the dustproof cover (4), and a second ball assembly is arranged in the active gap (5), and the second ball assembly includes a plurality of second steel balls (6) distributed around the axial circumference of the bearing inner ring (1), and a second retaining frame (61).

2. A bearing according to claim 1, characterized in that: The end surface of the bearing inner ring (1) is concavely formed with an inner groove (7), the side wall of the dust cover (4) close to the bearing inner ring (1) is convexly formed with an outer convex portion (9), the through hole (8) passes through the outer convex portion (9), the outer convex portion (9) is inserted into the inner groove (7), and the movable gap (5) is formed between the outer convex portion (9) and the inner groove (7).

3. A bearing according to claim 2, characterized in that: The inner groove (7) comprises a horizontally arranged annular surface (71) and an inner conical surface (72) arranged along the edge of the annular surface (71), and each of the second steel balls (6) is arranged between the inner conical surface (72) and the opposite side of the outer protrusion (9).

4. A bearing according to claim 1, characterized in that: A tapered hole (10) is provided on the inner wall of the through hole (8) away from the bearing inner ring (1), and the inner diameter of the tapered hole (10) gradually decreases in a direction approaching the bearing inner ring (1).

5. A bearing according to claim 1, characterized in that: A plurality of fasteners (11) are detachably connected between the dust cover (4) and the corresponding end surface of the bearing outer ring (2), and the plurality of fasteners (11) are distributed around the axial circumference of the bearing outer ring (2).

6. A bearing according to claim 5, characterized in that: At least one sealing ring (12) is embedded on the end surface of the bearing outer ring (2), and the sealing ring (12) and the fastener (11) are staggered in position. The dust cover (4) is provided with a docking groove (13) for the sealing ring (12) to be inserted into the side wall close to the bearing outer ring (2), and the sealing ring (12) and the docking groove (13) are interference fit.

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