Automobile hub bearing sealing structure

Abstract

The utility model discloses an automobile hub bearing sealing structure, which relates to the technical field of bearings and comprises a bearing outer ring, rubber sealing gaskets and a lubricating mechanism, a bearing inner ring is arranged on the inner side of the bearing outer ring, a plurality of rolling bodies are embedded in a retainer, the rubber sealing gaskets are arranged on the left side and the right side of the retainer, and the lubricating mechanism is arranged on the rubber sealing gaskets. And the lubricating mechanism is arranged on the surface of the bearing outer ring. The two rubber sealing gaskets are arranged to cover the rolling body, external dust or water vapor is prevented from making contact with the rolling body, the service life of the bearing is prolonged, sealing is formed between the outer sides of the rubber sealing gaskets and the bearing outer ring through the first sealing lips and the first annular grooves, and the service life of the bearing is prolonged. The inner side of the rubber sealing gasket is sealed with the bearing inner ring through the second sealing lip and the second annular groove, and the contact surface between the second sealing lip and the second annular groove is small, so that the friction force generated between the bearing inner ring and the second sealing lip when the bearing inner ring rotates is small, and the bearing has high sealing performance and flexibility at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field, concretely is a kind of automobile wheel hub bearing sealing structure. BACKGROUND

[0002] Bearing is an important part in contemporary mechanical equipment, its main function is to support mechanical rotating body, reduce its friction coefficient in the process of movement, and ensure its rotation accuracy, bearing is usually composed of inner and outer rings, retainer, ball body and sealing assembly. The existing bearing sealing is mainly divided into non-contact and contact type two structures, the friction of non-contact sealing structure is small and convenient for bearing rotation, but non-contact sealing structure exists local gap, leading to poor sealing, after long working time, water vapor etc. May enter the inside of bearing through micro gap, and then affect bearing performance, contact type sealing structure is good although sealing, but friction is big, can affect the rotation performance of bearing, secondly, the sealing assembly outside bearing is removed after use, to lubricate the ball inside bearing, it is inconvenient to use, for this, a kind of automobile wheel hub bearing sealing structure is provided. SUMMARY

[0003] Therefore, the utility model discloses a kind of automobile wheel hub bearing sealing structure, to solve the problem that most of the existing pipeline is stainless steel material, heavy, transportation is more difficult, in actual use process, it is prone to aging, service life is lower, and the heat conductivity of stainless steel is larger, leading to the problem that the heat insulation performance of stainless steel pipeline is poor.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of automobile wheel hub bearing sealing structure, including bearing outer ring, rubber sealing pad and lubricating mechanism, the inside of the bearing outer ring is provided with bearing inner ring, and bearing outer ring and bearing inner ring are provided with retainer between, the inside of the retainer is embedded with several rolling bodies, the middle of the inner wall of the bearing outer ring is equipped with first track, the middle of the outside of the bearing inner ring is equipped with second track.

[0005] The rubber sealing pad is set to the left and right sides of retainer, and the outside of rubber sealing pad is integrally provided with first sealing lip, the inside of rubber sealing pad is integrally provided with second sealing lip, the edge of the inner wall of the bearing outer ring is provided with two first annular grooves, the edge of the outside of the bearing inner ring is equipped with two second annular grooves, and the lubricating mechanism is set to the surface of bearing outer ring.

[0006] Preferably, the top of the rolling body is connected with the bearing outer ring by first track, and the bottom of the rolling body is connected with the bearing inner ring by second track.

[0007] Preferably, the outer surface of the first sealing lip is in close contact with the inner surface of the first annular groove, and the rubber sealing pad is parallel to the retainer, and the rubber sealing pad is connected with the bearing outer ring through the outer surface of the first sealing lip and the first annular groove.

[0008] Preferably, the cross section of the second sealing lip is triangular, and the rubber sealing pad is connected with the bearing inner ring through the second sealing lip and the second annular groove.

[0009] Preferably, the lubricating mechanism comprises a lubricating channel, a sealing plug and a pull ring, and the inside of the lubricating channel is penetrated by the sealing plug, and the top end of the sealing plug is integrally provided with the pull ring.

[0010] Preferably, the sealing plug is made of rubber material, and the bottom of the sealing plug is arc-shaped, and the bottom of the sealing plug is flush with the upper wall of the first track.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] The utility model discloses a bearing, which comprises a bearing outer ring, a bearing inner ring, a first track, a second track, a first sealing lip, a second sealing lip, a first annular groove, a second annular groove and a rubber sealing pad.

[0013] The utility model discloses a bearing, which comprises a bearing outer ring, a bearing inner ring, a first track, a second track, a first sealing lip, a second sealing lip, a first annular groove, a second annular groove and a rubber sealing pad.

[0014] The utility model discloses a bearing, which comprises a bearing outer ring, a bearing inner ring, a first track, a second track, a first sealing lip, a second sealing lip, a first annular groove, a second annular groove and a rubber sealing pad. ACCURATE DRAWINGS

[0015] Figure 1 It is the split three -dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is the combined structure schematic diagram of the utility model;

[0017] Figure 3 It is the combined structure schematic diagram of the utility model; Figure 2 It is the combined structure schematic diagram of the utility model;

[0018] Figure 4 For the utility model Figure 2 Side section structure schematic view

[0019] Figure 5 For the utility model Figure 3 The middle A place amplification structure schematic view.

[0020] In the figure: 1, bearing outer ring;2, bearing inner ring;3, retainer;4, rolling body;5, first track;6, second track;7, sealing gasket;8, first sealing lip;9, second sealing lip;10, first annular groove;11, second annular groove;12, lubricating mechanism;1201, lubricating channel;1202, sealing plug;1203, pull ring. Specific embodiments

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as a limitation on the utility model.

[0022] The embodiments will be described below according to the overall structure of the utility model.

[0023] Please refer to Figures 1-5 A kind of automobile hub bearing sealing structure, including bearing outer ring 1, rubber sealing gasket 7 and lubricating mechanism 12, the inside of the bearing outer ring 1 is provided with bearing inner ring 2, and bearing outer ring 1 and bearing inner ring 2 between are provided with retainer 3, the inside of the retainer 3 is embedded with several rolling bodies 4, the middle part of the inner wall of the bearing outer ring 1 is equipped with first track 5, the middle part of the outside of the bearing inner ring 2 is equipped with second track 6, the top end of the rolling body 4 is connected with bearing outer ring 1 by first track 5, and the bottom end of rolling body 4 is connected with bearing inner ring 2 by second track 6, retainer 3 separates several rolling bodies 4, avoids mutual collision between rolling bodies 4, and rolling body 4 is oriented sliding in first track 5 and second track 6 inside;

[0024] The rubber sealing gasket 7 is arranged on the left and right sides of the retainer 3, and the outer side of the rubber sealing gasket 7 is integrally provided with a first sealing lip 8, and the inner side of the rubber sealing gasket 7 is integrally provided with a second sealing lip 9, the inner wall edge of the bearing outer ring 1 is provided with two first annular grooves 10, the outer surface of the first sealing lip 8 is matched with the inner surface of the first annular groove 10, and the rubber sealing gasket 7 is parallel to the retainer 3, and the rubber sealing gasket 7 is connected with the bearing outer ring 1 through the outer surface of the first sealing lip 8 and the first annular groove 10, and the two rubber sealing gaskets 7 are arranged to cover the rolling body 4, so as to avoid the contact between the rolling body 4 and the external dust or water vapor, thereby improving the service life of the bearing, the first sealing lip 8 on the rubber sealing gasket 7 is clamped with the first annular groove 10 in the bearing outer ring 1, so that the rubber sealing gasket 7 and the bearing outer ring 1 are synchronously fixed, the outer edge of the bearing inner ring 2 is provided with two second annular grooves 11, the cross section of the second sealing lip 9 is triangular structure, and the rubber sealing gasket 7 is connected with the bearing inner ring 2 through the second sealing lip 9 and the second annular groove 11, which greatly reduces the contact area between the second sealing lip 9 and the second annular groove 11, thereby reducing the friction between the bearing inner ring 2 and the second sealing lip 9 when rotating, so that the bearing has strong sealing performance and flexibility at the same time.

[0025] The lubricating mechanism 12 is arranged on the surface of the bearing outer ring 1, the lubricating mechanism 12 comprises a lubricating channel 1201, a sealing plug 1202 and a pull ring 1203, the inside of the lubricating channel 1201 penetrates the sealing plug 1202, the top end of the sealing plug 1202 is integrally provided with the pull ring 1203, the bottom of the lubricating channel 1201 is communicated with the first track 5, therefore, the lubricating oil can be directly injected into the bearing through the lubricating channel 1201, without disassembling the rubber sealing gasket 7, which is convenient to use, the sealing plug 1202 is made of rubber material, the bottom of the sealing plug 1202 is arc-shaped, and the bottom of the sealing plug 1202 is flush with the upper wall of the first track 5, the sealing plug 1202 is used for closing the lubricating channel 1201, so as to avoid the external dust and water vapor entering the bearing through the lubricating channel 1201, the bottom end of the sealing plug 1202 fills the bottom of the lubricating channel 1201, so as to avoid the rolling body 4 being stuck when passing through the bottom of the lubricating channel 1201, which is beneficial to the stable rotation of the rolling body 4 around the first track 5.

[0026] Working principle: the bearing outer ring 1 and the bearing inner ring 2 are provided with a retainer 3 and a rolling body 4, the retainer 3 separates a plurality of rolling bodies 4, avoids mutual collision between the rolling bodies 4, the rolling bodies 4 are oriented to slide inside the first track 5 and the second track 6, when installing the rubber sealing gasket 7, the first sealing lip 8 on the rubber sealing gasket 7 is clamped with the first annular groove 10 inside the bearing outer ring 1, the second sealing lip 9 on the rubber sealing gasket 7 is clamped with the second annular groove 11, since the first sealing lip 8 is completely matched with the first annular groove 10, therefore, the contact surface of the first sealing lip 8 and the first annular groove 10 is large, so that the first sealing lip 8 is fixed inside the first annular groove 10, so that the rubber sealing gasket 7 is fixedly connected with the bearing outer ring 1, since the contact surface between the second sealing lip 9 and the second annular groove 11 is small, therefore, the friction force generated by the bearing inner ring 2 when rotating and the second sealing lip 9 is small, and the rubber sealing gasket 7 is matched, so that the bearing has strong sealing performance and flexibility at the same time, when the flexibility of the rolling body 4 decreases after long time use, the sealing plug 1202 can be pulled out, and lubricating oil is injected into the lubricating channel 1201, since the bottom of the lubricating channel 1201 is communicated with the first track 5, therefore, the lubricating oil can be directly injected into the bearing through the lubricating channel 1201, without disassembling the rubber sealing gasket 7, which is convenient to use.

[0027] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art.

[0028] The orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like as shown in the drawings are based on the orientations or positional relationships shown in the drawings, which are only a simplified description for the convenience of describing the utility model, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the utility model.

[0029] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, 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 sealing structure for an automobile wheel hub bearing, comprising a bearing outer ring (1), a rubber sealing gasket (7) and a lubricating mechanism (12), characterized in that: The inner side of the bearing outer ring (1) is provided with a bearing inner ring (2), and a retainer (3) is arranged between the bearing outer ring (1) and the bearing inner ring (2), the inside of the retainer (3) is inlaid with a plurality of rolling elements (4), the middle of the inner wall of the bearing outer ring (1) is provided with a first track (5), and the middle of the outer side of the bearing inner ring (2) is provided with a second track (6); The rubber sealing gasket (7) is arranged on the left and right sides of the retainer (3), and the outer side of the rubber sealing gasket (7) is integrally provided with a first sealing lip (8), the inner side of the rubber sealing gasket (7) is integrally provided with a second sealing lip (9), the edge of the inner wall of the bearing outer ring (1) is provided with two first annular grooves (10), the edge of the outer side of the bearing inner ring (2) is provided with two second annular grooves (11), and the lubricating mechanism (12) is arranged on the surface of the bearing outer ring (1); The outer surface of the first sealing lip (8) is attached to the inner surface of the first annular groove (10), the rubber sealing gasket (7) is parallel to the retainer (3), and the rubber sealing gasket (7) is connected to the bearing outer ring (1) through the outer surface of the first sealing lip (8) and the first annular groove (10); The cross section of the second sealing lip (9) is triangular, and the rubber sealing gasket (7) is connected to the bearing inner ring (2) through the second sealing lip (9) and the second annular groove (11).

2. The sealing structure of an automobile wheel hub bearing according to claim 1, characterized in that: The top end of the rolling element (4) is connected to the bearing outer ring (1) through the first track (5), and the bottom end of the rolling element (4) is connected to the bearing inner ring (2) through the second track (6).

3. The sealing structure of an automobile wheel hub bearing according to claim 1, characterized in that: The lubricating mechanism (12) comprises a lubricating channel (1201), a sealing plug (1202) and a pull ring (1203), the inside of the lubricating channel (1201) penetrates the sealing plug (1202), and the top end of the sealing plug (1202) is integrally provided with the pull ring (1203).

4. The sealing structure of an automobile wheel hub bearing according to claim 3, characterized in that: The sealing plug (1202) is made of rubber material, the bottom of the sealing plug (1202) is arc-shaped, and the bottom of the sealing plug (1202) is flush with the upper wall of the first track (5).

Images