CN214698830U

CN214698830U - Low-torque high-sealing hub bearing unit sealing structure

Info

Publication number: CN214698830U
Application number: CN202022926720.4U
Authority: CN
Inventors: 黄德杰; 张高峰; 汪峰
Original assignee: Wanxiang Group Corp; Zhejiang Wanxiang Precision Industry Co Ltd
Current assignee: Wanxiang Group Corp; Zhejiang Wanxiang Precision Industry Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-11-12
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a wheel hub bearing unit seal structure of low torque high seal mainly includes the sealing, and the inner frame is installed in the sealing inboard in the outer lane, and outer skeleton is installed in the ring flange inboardly, sets up seal lip A, seal lip B, seal lip C, seal lip D, seal lip E on the inner frame, is provided with static sealing rubber B and static sealing rubber A on the outer frame, sets up guiding gutter A outside the outer lane, is formed with guiding gutter B between outer skeleton top and the ring flange. The utility model adopts the labyrinth seal structure composed of a plurality of labyrinth lips, realizes effective resistance to the invasion of external muddy water through the pre-sealing and diversion effect of the diversion trench, and ensures that the hub bearing unit has good sealing effect; the component type sealing is adopted, the lip friction coefficient is reduced, the design structure of a plurality of contact sealing lips is utilized, and the static sealing rubber is contacted with the framework component type, so that the friction torque level of the bearing is effectively reduced, the friction loss is reduced, and the aims of low torque and high sealing performance are achieved.

Description

Low-torque high-sealing hub bearing unit sealing structure

Technical Field

The utility model relates to a field of wheel hub bearing unit, concretely relates to wheel hub bearing unit seal structure of low torque high seal.

Background

Under the current development trend that requires both low torque and high sealing performance, the host computer factory has higher and higher requirements on the performance of the hub bearing sealing ring, and the requirements on the sealing design are correspondingly improved. In the original sealing structure in the prior art, during the muddy water spraying process, the muddy water easily invades into the sealing channel to form a direct impact effect on the sealing lip, and meanwhile, in the static sealing structure of the rubber and the framework, the interference magnitude between the framework and the outer ring and the sealing effect of the rubber are general, and the muddy water is easily invaded from the static sealing position after long-time washing. Although the sealing effect can be enhanced by increasing the interference of the sealing lip, the rotating moment of the hub bearing is increased correspondingly.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a wheel hub bearing unit seal structure of low torque high seal.

The purpose of the utility model is accomplished through following technical scheme: the sealing structure of the hub bearing unit with low torque and high sealing mainly comprises an outer ring, an inner ring, a flange plate, a sealing part, an inner framework, an outer framework, static sealing rubber A, a sealing lip B, a sealing lip C, a sealing lip D, static sealing rubber B, static sealing rubber C, a sealing lip E, a sealing cavity A, a sealing cavity B, a sealing cavity C, a diversion trench A, low-torque lubricating grease, a diversion trench B and a bevel, wherein the inner ring is arranged on the flange plate, the outer ring is sleeved outside the inner ring and the flange plate, the sealing part is arranged at an opening gap between the outer ring and the flange plate, the inner framework in the sealing part is arranged inside the outer ring, the outer framework is arranged inside the flange plate, the sealing lip A is arranged at the top of the inner framework, the top of the inner framework is sealed with the outer ring through the static sealing rubber C, the sealing lip B, the sealing lip C and the sealing lip D are arranged in the middle of the inner framework, and the sealing lip E is arranged at the bottom end of the inner framework, seal lip B, seal lip C, the cooperation constitutes seal chamber A between seal lip D and the exoskeleton, seal chamber B, seal chamber C, seal lip D, low torque lubricating grease is filled in seal lip E and the exoskeleton department of contact, the bottom and the upper end installation department of exoskeleton and ring flange are provided with static sealing rubber B and static sealing rubber A respectively, the inner frame is the dog-ear with outer lane department of contact, set up guiding gutter A between seal lip A inboard and outer lane, be formed with guiding gutter B between exoskeleton top and the ring flange.

The end face of the sealing lip A is opposite to that of the flange plate but not in contact with the flange plate, the end face of the sealing lip B is opposite to that of the outer framework but not in contact with the outer framework, the end face of the sealing lip C is opposite to that of the outer framework but not in contact with the outer framework, the end face of the sealing lip D is in contact with the outer framework, and the end face of the sealing lip E is in contact with the outer framework.

The folding angle of the inner framework is slightly smaller than 90 degrees.

The utility model has the advantages that: the utility model adopts the labyrinth seal structure composed of a plurality of labyrinth lips, realizes effective resistance to the invasion of external muddy water through the pre-sealing and diversion effect of the diversion trench, and ensures that the hub bearing unit has good sealing effect; the component type sealing is adopted, the lip friction coefficient is reduced, the design structure of a plurality of contact sealing lips is utilized, and the static sealing rubber is contacted with the framework component type, so that the friction torque level of the bearing is effectively reduced, the friction loss is reduced, and the aims of low torque and high sealing performance are achieved.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic view of the sealing portion structure of the present invention.

Fig. 4 is a schematic view of the inner frame structure of the present invention.

Fig. 5 is a schematic view of the outer frame structure of the present invention.

Description of reference numerals: the sealing structure comprises an outer ring 1, an inner ring 2, a flange 3, a sealing part 4, an inner framework 5, an outer framework 6, static sealing rubber A7, a sealing lip A8, a sealing lip B9, a sealing lip C10, a sealing lip D11, static sealing rubber B12, static sealing rubber C13, a sealing lip E14, a sealing cavity A15, a sealing cavity B16, a sealing cavity C17, a diversion trench A18, low-torque lubricating grease 19, a diversion trench B20 and a bevel 21.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

example (b): as shown in the attached drawings, the low-torque high-sealing hub bearing unit sealing structure mainly comprises an outer ring 1, an inner ring 2, a flange 3, a sealing part 4, an inner frame 5, an outer frame 6, static sealing rubber A7, a sealing lip A8, a sealing lip B9, a sealing lip C10, a sealing lip D11, static sealing rubber B12, static sealing rubber C13, a sealing lip E14, a sealing cavity A15, a sealing cavity B16, a sealing cavity C17, a diversion trench A18, low-torque lubricating grease 19, a diversion trench B20 and a bevel 21, wherein the inner ring 2 is arranged on the flange 3, the outer ring 1 is sleeved outside the inner ring 2 and the flange 3, the sealing part 4 is arranged at an opening gap between the outer ring 1 and the flange 3, the inner frame 5 is arranged inside the outer ring 1 in the sealing part 4 in an interference manner, the outer frame 6 is arranged inside the flange 3 in an interference manner, the top end of the inner frame 5 is provided with a sealing lip 8, the top of the inner frame 5 is sealed with the outer ring 1 through the static sealing rubber C13, the middle part of the inner framework 5 is provided with a sealing lip B9, a sealing lip C10 and a sealing lip D11 through a sealant, the bottom end of the inner framework 5 is provided with a sealing lip E14 through the sealant, the contact part of the sealing lip B9, the sealing lip C10, the sealing lip D11 and the outer framework 6 is matched to form a sealing cavity A15, the sealing cavity B16 and a sealing cavity C17, the contact part of the sealing lip D11 and the sealing lip E14 with the outer framework 6 is filled with low-torque lubricating grease 19, the outer framework 6 and the bottom end and upper end installation part of the flange 3 are respectively provided with static sealing rubber B12 and static sealing rubber A7 through the sealant, the contact part of the inner framework 5 and the outer framework 1 is a folding angle 21, the folding angle 21 of the inner framework 5 is slightly smaller than 90 degrees so as to ensure that when the inner framework 5 is pressed into the outer framework 1, the end face of the outer framework 1 is firmly adhered to the static sealing rubber B12. A diversion trench A18 is arranged between the inner side of the sealing lip A8 and the outer ring 1, and a diversion trench B20 is formed between the top end of the outer framework 6 and the flange 3.

The sealing lip A8 is opposite to but not in contact with the end face of the flange plate 3 to form a1 st pre-seal, the sealing lip B9 is opposite to but not in contact with the outer framework 6 to form a 2 nd pre-seal, the sealing lip C10 is opposite to but not in contact with the outer framework 6 to form a 3 rd pre-seal, the sealing lip D11 is in contact with the outer framework 6 to form a 4 th pre-seal, the four seals jointly block the invasion of external muddy water impurities, the sealing lip E14 is in contact with the outer framework 6 to form a 5 th pre-seal, and the leakage of lubricating grease in the bearing is prevented.

The utility model discloses sealed principle: in the operation process of the bearing, the outer ring 1 is fixed and does not rotate, and the flange plate 3 rotates. During the muddy water splashing process, muddy water is firstly accumulated in the diversion groove A18 and flows down along the outer diameter of the outer ring 1. A small amount of muddy water invades from the gap between the sealing lip A8 and the end face of the flange plate 3, and a guide groove B20 is formed by bending the upper end of the outer framework 6 at a certain angle and the end face of the flange plate 3, so that the muddy water flows into the guide groove B20, and simultaneously, the muddy water is rapidly rotated and led out of the sealing structure along with the rotation of the flange plate 3 and the outer framework 6. With the increase of the severity of the mud-water working condition, a smaller amount of mud water enters the seal cavity A15, the seal cavity B16 and the seal cavity C17 along the seal channel. With the deepening of the seal labyrinth and the blocking of the pre-seal lip, the muddy water entering the interior of the seal structure is less. The sealing lip D11 is in contact interference fit with the outer framework 6 to form a final sealing for the outside invading muddy water. The sealing lip E14 is in contact interference fit with the outer framework 6, and prevents grease inside the bearing from leaking.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. The utility model provides a wheel hub bearing unit seal structure of low torque high seal which characterized in that: mainly comprises an outer ring (1), an inner ring (2), a flange (3), a sealing part (4), an inner framework (5), an outer framework (6), static sealing rubber A (7), a sealing lip A (8), a sealing lip B (9), a sealing lip C (10), a sealing lip D (11), static sealing rubber B (12), static sealing rubber C (13), a sealing lip E (14), a sealing cavity A (15), a sealing cavity B (16), a sealing cavity C (17), a diversion trench A (18), low-torque lubricating grease (19), a diversion trench B (20) and a bevel (21), wherein the inner ring (2) is arranged on the flange (3), the outer ring (1) is sleeved outside the inner ring (2) and the flange (3), the sealing part (4) is arranged at an opening gap between the outer ring (1) and the flange (3), the inner framework (5) in the sealing part (4) is arranged on the inner side of the outer ring (1), the outer framework (6) is arranged on the inner side of the flange plate (3), the top end of the inner framework (5) is provided with a sealing lip A (8), the top of the inner framework (5) is sealed with the outer ring (1) through static sealing rubber C (13), the middle part of the inner framework (5) is provided with a sealing lip B (9), a sealing lip C (10) and a sealing lip D (11), the bottom end of the inner framework (5) is provided with a sealing lip E (14), the contact parts of the sealing lip B (9), the sealing lip C (10), the sealing lip D (11) and the outer framework (6) are matched to form a sealing cavity A (15), a sealing cavity B (16) and a sealing cavity C (17), low-torque lubricating grease (19) is filled in the contact parts of the sealing lip B (11) and the sealing lip E (14) and the outer framework (6), the static sealing rubber B (12) and the static sealing rubber A (7) are respectively arranged at the installation parts of the bottom end and the upper end of the outer framework (6) and the flange plate (3), the contact part of the inner framework (5) and the outer ring (1) is a break angle (21), a diversion trench A (18) is arranged between the inner side of the sealing lip A (8) and the outer ring (1), and a diversion trench B (20) is formed between the top end of the outer framework (6) and the flange plate (3).

2. The low-torque high-seal hub bearing unit seal structure according to claim 1, wherein: the end faces of the sealing lip A (8) and the flange plate (3) are opposite but not in contact, the sealing lip B (9) and the outer framework (6) are opposite but not in contact, the sealing lip C (10) and the outer framework (6) are opposite but not in contact, the sealing lip D (11) and the outer framework (6) are in contact, and the sealing lip E (14) and the outer framework (6) are in contact.

3. The low-torque high-seal hub bearing unit seal structure according to claim 1, wherein: the break angle (21) of the inner framework (5) is slightly smaller than 90 degrees.