Bearing ring sealing structure

Abstract

The utility model provides a bearing ring sealing structure which comprises an inner ring, an outer ring and a dustproof cover, outer ring openings are formed in the two ends of the outer ring face of the inner ring respectively, and inner ring openings are formed in the two ends of the inner ring face of the outer ring respectively; the dustproof cover is annular and arranged between the outer ring opening and the inner ring opening, the dustproof cover is tightly attached to the bottom face of the inner ring opening, and a sliding type sealing structure is arranged between the dustproof cover and the outer ring opening in the circumferential direction; a plurality of slots are uniformly formed in the annular surface of the inner ring opening, an elastic sheet is arranged in each slot, and the elastic sheets tightly press the dustproof cover. In the utility model, the dustproof cover simultaneously seals the inner ring and the outer ring of the bearing, and the inner ring of the bearing can rotate relative to the dustproof cover, so that the sealing effect on the bearing is improved, the operation stability of the bearing is ensured, and the service life of the bearing is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing production field, especially a bearing ring seal structure is provided. BACKGROUND

[0002] Bearing is widely used in various mechanical equipment, is used for supporting equipment on mechanical rotating parts, bearing can reduce the friction coefficient of equipment in transmission process, guarantees its rotation accuracy.

[0003] Bearing includes bearing ring, namely inner ring and outer ring, and rolling element, the outer ring surface of inner ring, the inner ring surface of outer ring is equipped with raceway respectively, rolling element is installed in raceway, bearing is equipped with lubricating grease, to form oil film between rolling element and raceway, avoid metal piece direct contact, reduce friction and abrasion, improve bearing running stability. In order to prevent foreign matter from invading, eroding bearing, to prevent lubricating grease from leaking, need to seal bearing, usually set up dust cover at both ends of bearing ring, dust cover is generally fixed to outer ring, and the bearing is sealed by dust cover.

[0004] Dust cover is usually clamped and fixed to bearing outer ring, and contacts sealing with bearing outer ring, and the inner ring of bearing rotates relative to the outer ring, a certain gap needs to be reserved between dust cover and bearing inner ring to prevent dry grinding of dust cover when the inner ring rotates, but the existence of the gap reduces the sealing effect of the dust cover on the bearing, and there is a risk of small dust eroding the bearing and lubricating grease leaking in the bearing, which ultimately affects the normal operation of the bearing and its service life. In addition, the dust cover is usually installed by press fitting, and the dust cover is a thin-walled part. Sometimes, the dust cover will deform during press fitting. The deformed dust cover needs to be removed and replaced with a new dust cover for re-press fitting, which is inconvenient for production. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims at providing a bearing ring seal structure to improve the sealing effect of the bearing and improve the service life of the bearing.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A bearing ring seal structure, comprising an inner ring, an outer ring, and a dust cover arranged at both ends of the bearing ring, the rolling element of the bearing being arranged between the raceways of the inner ring and the outer ring, the outer ring surface of the inner ring being provided with outer ring openings at both ends, and the inner ring surface of the outer ring being provided with inner ring openings at both ends.

[0008] The dust cover is annular and arranged between the outer ring openings and the inner ring openings, and the dust cover tightly abuts the bottom surface of the inner ring opening, a limiting structure is arranged between the dust cover and the inner ring opening in the circumferential direction, and a sliding type sealing structure is arranged between the dust cover and the outer ring opening in the circumferential direction.

[0009] The annular surface of the inner ring opening is uniformly provided with a plurality of insertion slots, and each insertion slot is provided with an elastic sheet.

[0010] Further, the limiting structure comprises a plurality of fixing grooves uniformly arranged on the bottom surface of the inner ring opening, and a fixing protrusion arranged on the inner side surface of the dust cover, the fixing protrusion is inserted into the fixing groove to limit the dust cover in the circumferential direction.

[0011] Further, the sliding sealing structure comprises a ring groove arranged on the bottom surface of the outer ring opening, and a protruding ring arranged on the inner side surface of the dust cover, the protruding ring is inserted into the ring groove, the top of the protruding ring abuts against the bottom of the ring groove, and the surface of the protruding ring and the bottom of the ring groove are respectively provided with a polytetrafluoroethylene coating.

[0012] Further, the protruding ring is a stamping structure formed by stamping the outer surface of the dust cover.

[0013] Further, the bottom of the ring groove is an arc surface, and the top of the protruding ring is a spherical surface.

[0014] Further, the elastic sheet is a V-shaped elastic sheet, one sheet body of the V-shaped elastic sheet is provided with a mounting protrusion, the width of the insertion slot and the width of the sheet body of the elastic sheet are corresponding, a mounting hole is arranged on the side wall close to the end surface of the outer ring of the insertion slot, the mounting protrusion is inserted into the mounting hole, and the other sheet body of the elastic sheet tightly presses the dust cover.

[0015] Further, the dust cover is a copper cover or an iron cover structure.

[0016] Compared with the prior art, the bearing ring sealing structure has the following advantages:

[0017] (1) In the utility model, the dust cover is arranged between the inner ring and the outer ring of the bearing, the dust cover is tightly fixed by the elastic sheet arranged on the outer ring, the limiting structure is arranged between the dust cover and the outer ring in the circumferential direction, the sliding sealing structure is arranged between the dust cover and the inner ring in the circumferential direction, the dust cover simultaneously contacts and seals the inner ring and the outer ring, the inner ring can rotate relative to the dust cover, the sealing effect of the dust cover on the bearing is improved, the stability of the bearing in operation is ensured, and the service life of the bearing is improved.

[0018] (2) In the utility model, the dust cover is arranged in the annular space formed by the inner ring and the outer ring of the bearing, a plurality of elastic sheets are inserted into the insertion slots of the outer ring to tightly fix the dust cover, and the dust cover is convenient to disassemble and assemble. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings constituting a part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0020] Figure 1A bearing ring sealing structure front view of the utility model embodiment;

[0021] Figure 2 A bearing ring sealing structure side view of the utility model embodiment;

[0022] Figure 3 For Figure 1 A enlarged view in the of the utility model embodiment;

[0023] Figure 4 For the outer ring front view in the embodiment;

[0024] Figure 5 For the outer ring side view in the embodiment;

[0025] Figure 6 For the dust cover front view in the embodiment;

[0026] Figure 7 For the dust cover top view in the embodiment.

[0027] Mark explanation:

[0028] 1-inner ring;11-outer ring mouth;101-ring groove;2-outer ring;21-inner ring mouth;22-fixed slot;23-insertion slot;24-mounting hole;3-dust cover;31-convex ring;32-fixing protrusion;4-elastic sheet;41-mounting protrusion;5-rolling element. Specific implementation

[0029] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] As Figure 1 , Figure 2 and Figure 3 A bearing ring sealing structure, comprising inner ring 1, outer ring 2 and the dust cover 3 of bearing ring two ends are set respectively, the outer ring surface of inner ring 1, the inner ring surface of outer ring 2 are all equipped with raceway, and the rolling element 5 of bearing is set between the raceway of inner ring 1 and outer ring 2, simultaneously, the both ends of the outer ring surface of inner ring 1 are respectively set with outer ring mouth 11, and the both ends of the inner ring surface of outer ring 2 are respectively set with inner ring mouth 21, and inner ring mouth 21 and corresponding inner ring mouth 21 form annular space.Dust cover 3 is the annular cover body structure of corresponding annular space, and dust cover 3 is set in the annular space, and the inner side of dust cover 3, i.e. the side towards the bearing, is tightly attached to the bottom surface of inner ring mouth 21 at corresponding inner ring mouth 21 position, and the inner side of dust cover 3 is set between the bottom surface of outer ring mouth 21 and outer ring mouth 21 at corresponding outer ring mouth 21 position and circumferentially, thereby dust cover 3 simultaneously contacts and seals inner ring mouth 21 and outer ring mouth 11, and then seals bearing.Inner ring mouth 21 is circumferentially set with several elastic sheets 4, and elastic sheet 4 tightly presses and fixes dust cover 3.

[0031] The dust cover 3 and the outer ring 2 are fixed, the sliding type sealing structure is arranged between the dust cover 3 and the inner ring 1, the outer ring and the inner ring of the contact sealing bearing are contacted by the dust cover 3, the dust cover 3 and the inner ring 1 keep contact when the inner ring rotates relative to the outer ring, the sealing effect of the bearing is improved, dust invasion and erosion of the bearing are effectively prevented, leakage of lubricating grease in the bearing is prevented, the bearing can stably run, and the service life of the bearing is improved.

[0032] The outer ring 2 structure is shown as Figure 4 、 Figure 5 The bottom surface of the inner ring opening 21 is uniformly provided with a plurality of fixing grooves 22, and the fixing grooves 22 are circular blind hole structures; the annular surface of the inner ring opening 21 is correspondingly provided with an insertion groove 23 of the elastic sheet 4, and the width of the insertion groove 23 is corresponding to the width of the sheet body of the elastic sheet 4, so as to ensure the stability after the elastic sheet is inserted; the insertion groove 23 is provided with a mounting hole 24 close to the side wall of the end surface of the outer ring 2, and the mounting hole 24 is a through hole.

[0033] In the utility model, the elastic sheet 4 is a V-shaped elastic sheet structure, the lengths of the two sheet bodies are different, and the shorter sheet body is provided with a mounting protrusion 41. During assembly, the elastic sheet 4 is inserted into the insertion groove 23, the mounting protrusion 41 is inserted into the mounting hole 24, and then the elastic sheet is fixed. The longer sheet body of the elastic sheet 4 abuts and tightly presses the outer side surface of the dust cover 3, so that the inner side surface of the dust cover 3 tightly abuts the bottom surface of the inner ring opening 21 and forms a seal with the bottom surface of the inner ring opening 21, the dust cover 3 is tightly fixed through the elastic sheet, the stability of the sliding type sealing structure between the dust cover 3 and the outer ring opening 11 is improved, wear clearance is prevented, the dust cover 3 is ensured to have good sealing performance on the outer ring opening 11, and the sealing effect of the bearing is improved. At the same time, since the dust cover 3 is a ring-shaped cover body arranged in a corresponding annular space, the elastic sheet 4 tightly pressing the dust cover is inserted and fixed in the insertion groove 23, the convenience of disassembling and replacing the dust cover 3 is improved.

[0034] The structure of the dust cover 3 is shown as Figure 6 、 Figure 7 The fixed protrusion 32 is arranged on the inner side surface of the dust cover 3 corresponding to the fixing groove 22 of the inner ring opening 21, and the convex ring 31 is arranged on the inner side surface of the dust cover 3 close to the inner ring position.

[0035] The annular groove 101 is arranged on the bottom surface of the outer ring opening 11 of the inner ring 1 corresponding to the convex ring 31, Figure 3The fixed protrusion 32 on the dust cover 3 is inserted into the fixed groove 22 of the inner ring opening 21 when the dust cover 3 is assembled, and the dust cover 3 is circumferentially limited, so that the dust cover 3 and the outer ring 2 are connected stably, and the dust cover 3 is prevented from rotating with the inner ring 1. At the same time, the convex ring 31 is inserted into the ring groove 101, the top of the convex ring 31 abuts against the bottom of the ring groove 101, and the surface of the convex ring 31 and the bottom of the ring groove 101 are respectively provided with a polytetrafluoroethylene coating. The convex ring 31 and the ring groove 101 are assembled, the top surface of the convex ring 31 and the bottom of the ring groove 101 are in contact, and a sliding sealing structure is formed in the circumferential direction, so that the dust cover 3 is in contact with the inner ring 1 when the inner ring 1 rotates relative to the outer ring 2; the polytetrafluoroethylene coating reduces the friction between the convex ring 31 and the bottom of the ring groove 101, reduces wear, and improves the sealing effect of the dust cover 3.

[0036] To prevent the dust cover 3 from contacting the bottom surface of the outer ring opening 11 and causing dry friction, the bottom surface of the outer ring opening 11 is located inside the bottom surface of the inner ring opening 21 in the axial direction, that is, the bottom surface of the outer ring opening 11 is closer to the rolling body than the bottom surface of the inner ring opening 21. When the inner side surface of the dust cover 3 is attached to the bottom surface of the outer ring opening 21, a distance is left between the inner side surface of the dust cover 3 and the bottom surface of the outer ring opening 11, so that the dust cover 3 can only contact the bottom surface of the ring groove of the outer ring opening 11 through the convex ring 31 and form a sealing structure.

[0037] In the utility model, the bottom of the ring groove 101 is an arc surface, the dust cover 3 is a copper cover or an iron cover structure, the top surface of the convex ring 31 on the dust cover 3 is a spherical surface, and the convex ring 31 is a stamping structure formed by stamping the outer surface of the dust cover 3.

[0038] In the utility model, the dust cover and the inner ring of the bearing, and the dust cover and the outer ring of the bearing form a contact sealing structure respectively, so that the sealing effect of the bearing is improved, the bearing can run stably, and the service life of the bearing is improved.

[0039] The above only describes preferred embodiments of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A bearing ring sealing structure, comprising an inner ring (1), an outer ring (2), and a dust cover (3) arranged at both ends of the bearing ring, and rolling elements (5) of the bearing are arranged between the raceways of the inner ring (1) and the outer ring (2), characterized in that: The outer ring surface of the inner ring (1) is respectively provided with an outer ring opening (11) at both ends, and the inner ring surface of the outer ring (2) is respectively provided with an inner ring opening (21) at both ends; The dust cover (3) is annular, arranged between the outer ring opening (11) and the inner ring opening (21), and tightly abuts the bottom surface of the inner ring opening (21), and the circumferential direction between the dust cover (3) and the inner ring opening (21) is provided with a limiting structure, and the circumferential direction between the dust cover (3) and the outer ring opening (11) is provided with a sliding sealing structure; The annular surface of the inner ring opening (21) is uniformly provided with a plurality of insertion grooves (23), and each insertion groove (23) is provided with an elastic sheet (4), and the elastic sheet (4) tightly presses the dust cover (3).

2. A bearing ring seal structure according to claim 1, wherein: The limiting structure includes a plurality of fixing grooves (22) uniformly arranged on the bottom surface of the inner ring opening (21) in the circumferential direction, and a fixing protrusion (32) correspondingly arranged on the inner side surface of the dust cover (3), the fixing protrusion (32) is inserted into the fixing groove (22) and limits the dust cover (3) in the circumferential direction.

3. A bearing ring seal structure according to claim 1, wherein: The sliding sealing structure includes a ring groove (101) arranged on the bottom surface of the outer ring opening (11), and a convex ring (31) correspondingly arranged on the inner side surface of the dust cover (3), the convex ring (31) is inserted into the ring groove (101), the top of the convex ring (31) abuts the groove bottom of the ring groove (101), and the surface of the convex ring (31) and the groove bottom of the ring groove (101) are respectively provided with a polytetrafluoroethylene coating.

4. A bearing ring seal structure according to claim 3, wherein: The convex ring (31) is a stamping structure formed by stamping the outer surface of the dust cover (3).

5. A bearing ring seal structure according to claim 3, wherein: The groove bottom of the ring groove (101) is an arc surface, and the top surface of the convex ring (31) is a spherical surface.

6. A bearing ring seal structure according to claim 1, wherein: The elastic sheet (4) is a V-shaped elastic sheet, one sheet body is provided with a mounting protrusion (41), the width of the insertion groove (23) and the width of the sheet body of the elastic sheet (4) are corresponding, the insertion groove is provided with a mounting hole (24) close to the side wall of the end surface of the outer ring (2), the mounting protrusion (41) is inserted into the mounting hole (24), and the other sheet body of the elastic sheet (4) tightly presses the dust cover (3).

7. A bearing ring seal structure according to claim 1, wherein: The dust cover (3) is a copper cover or an iron cover structure.

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