CN102777500A - Hub bearing unit with four-lip seal structure - Google Patents
Hub bearing unit with four-lip seal structure Download PDFInfo
- Publication number
- CN102777500A CN102777500A CN2012102651506A CN201210265150A CN102777500A CN 102777500 A CN102777500 A CN 102777500A CN 2012102651506 A CN2012102651506 A CN 2012102651506A CN 201210265150 A CN201210265150 A CN 201210265150A CN 102777500 A CN102777500 A CN 102777500A
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- Prior art keywords
- lip
- dust cover
- seal
- hub
- outward flange
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Abstract
The invention discloses a hub bearing unit with a four-lip seal structure. The hub bearing unit comprises an inner ring, a magnetic dust cover, a rubber seal ring, a steel ball, a retaining frame, an outer flange, an inner flange and a knurling bolt. An excircle of the rubber seal ring is provided with four lips, wherein a lip (a), a lip (b) and a lip (c) are in contact seal with the magnetic dust cover, the lip (a) and the lip (b) are in a diameter direction of the magnetic dust cover, and the lip (c) is positioned in a direction of an end face of the magnetic dust cover. Three inner cavities are formed between the seal ring and the dust cover, a lip (d) is in matching seal with an end face of the outer flange, so that the rubber seal ring is in close contact with an inner wall of the outer flange of a bearing, and dustproof sealing effects are achieved. The hub bearing unit seals a bearing roller path port, leakage of lubricating oil is avoided, moisture and dust are prevented from entering, abrasion of the bearing is avoided, and the good sealing effect is achieved.
Description
Technical field
A kind of automotive hub bearing unit, specifically a kind of wheel hub bearing unit with four lip seal structures.
Technical background
Being contained in the hub-bearing unit on the automobile brake, is relatively independent parts, owing to break directly contacts with dust, mud, water, and work under bad environment, so structural design is most important, requires to have good sealing property.See from the use and the test situation of present bearing; Damage of bearings is all caused by seal failure greatly; The main cause of seal failure is to pollute and the intrusion of muddy water causes interfacial corrosion from the bearing foreign matter; Scrap thereby cause seal failure to quicken bearing wear, the serious automobile brake that causes is scrapped.
Summary of the invention
The objective of the invention is to the above-mentioned automobile brake upper bearing (metal) sealability that is contained in bad; The bearing foreign matter is polluted to invade in the bearing and is caused interfacial corrosion; Seal failure makes bearing wear scrap problem; A kind of hub-bearing unit with four lip seal structures is provided, and this bearing not only sealing and dustproof is effective, and long service life.
Technological scheme of the present invention is achieved in that a kind of hub-bearing unit of four lip seal structures; It comprises inner ring, magnetic dust cover, rubber seal, steel ball, retainer, outward flange dish, inner flange and knurled nut; It is characterized in that: in the outward flange dish of hub, be provided with two row raceways on the circle, and also be respectively equipped with raceway on the cylindrical of the corresponding inner ring of two row raceways established and inner flange on the circle in the hub outward flange dish; Be contained in steel ball on the retainer; Successively two retainers are installed in respectively in the hub outward flange dish in the raceway between circle and inner ring and the inner flange cylindrical, last seal ring and magnetic dust cover cooperate be installed in the outward flange dish interior justify and an end of inner ring cylindrical between; Lower seal be installed in inner flange cylindrical and outward flange dish one end between, again with pack into the endoporus of inner flange of bolt.
The major character of last seal ring is: the rubber seal cylindrical is provided with four lips, wherein lip a, lip b and lip c and the contact seal of magnetic dust cover, and lip a and lip b are in magnetic dust cover diametric(al), and lip c is in magnetic dust cover end face direction.Form three inner chambers between seal ring and the dust cover.Lip d and outward flange dish end face fitted seal make rubber seal closely contact with bearing outward flange dish inwall, play the dust sealing effect.
The invention has the beneficial effects as follows, a kind of hub-bearing unit of four lip seal structures, last seal ring lip d and outward flange dish end face fitted seal make rubber seal closely contact with bearing outward flange dish inwall, play dustproof effect; Last seal ring lip a, lip b and lip c closely contact with the magnetic dust cover and seal; Rubber seal lip limit a and lip limit b can bear bigger pressure; To the bearing race port sealing, stop lubricant oil to leak, stop moisture and dust to get into; Avoid wearing and tearing, play excellent sealing effect bearing.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further description:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a structural representation of going up seal ring.
In Fig. 1: 1, inner ring, 2, the magnetic dust cover, 3, go up seal ring, 4, retainer, 5, the outward flange dish, 6, steel ball, 7, lower seal, 8, inner flange, 9, knurled nut.
In Fig. 2: lip a, lip b, lip c, lip d.
Embodiment
In the embodiment in figure 1; Hub-bearing unit with four lip seal structures; In the outward flange dish 5 of hub, be provided with two row raceways on the circle, and also be respectively equipped with raceway on the cylindrical of corresponding inner ring 1 of the two row raceways established on the circle in the hub outward flange dish and inner flange 8; Be contained in steel ball 6 on the retainer 4; Successively two retainers are installed in respectively in the raceway between hub outward flange dish 5 interior circles and inner ring 1 and inner flange 8 cylindricals, cooperate last seal ring 3 and magnetic dust cover 2 between the end that is installed in outward flange dish 5 interior circles and inner ring 1 cylindrical; Lower seal 7 be installed in inner flange 8 cylindricals and outward flange dish 5 one ends between, again with pack into the endoporus of inner flange 8 of knurled nut 9.
In the embodiment of Fig. 2, rubber seal is pressed into hub inside, the lip d of last seal ring and outward flange dish end face fitted seal make seal ring closely contact with bearing outward flange dish inwall, play dustproof effect; The lip a of last seal ring, lip b and lip c closely contact with the magnetic dust cover and seal, and lip a and lip b are in magnetic dust cover diametric(al), and lip c is in magnetic dust cover end face direction.Form three inner chambers between seal ring and the dust cover.When hub bearing assembly was worked, because frictional heating between rolling element and the interior raceway, the bearing cavity temperature raise; Atmospheric pressure increases in the chamber, forms malleation, and grease has the trend that leaks; Can bear big pressure because interference is big between lip a and the dust cover, organize grease to leak.When hub bearing assembly quits work; When temperature dropped to ambient temperature, the bearing cavity air leaked outside on a small quantity during owing to high temperature, and internal pressure can be lower than barometric pressure; The outside air band the trend that outer lip place moisture and dust have infiltration; Receive the external pressure effect this moment, lip c moves in the chamber, and the lip d effect of being under pressure is close to tightr with outward flange dish end face; Thereby the effect of being under pressure of lip limit makes the tightr of seal ring and the subsides of outward flange dish inwall, and seal ring stops moisture and dust to get into hub assembly inner chamber.The small amount of moisture of hub assembly inner chamber accumulation after bearing running next time, is cleared up away the small amount of moisture that accumulates in the chamber by action of centrifugal force.
Claims (2)
1. be used for four lip seal structures of hub-bearing unit, it is characterized in that, the sealing structure has four lip (a; B, c, d); Wherein, First lip (a), second lip (b) and the 3rd lip (c) and the contact seal of magnetic dust cover, first lip (a) and second lip (b) are in magnetic dust cover diametric(al), and the 3rd lip (c) is in magnetic dust cover end face direction; Form three inner chambers between the dust cover of sealing configuration and hub-bearing unit; The 4th lip (d) and outward flange dish end face fitted seal make rubber seal closely contact with bearing outward flange dish inwall, play the dust sealing effect.
2. hub-bearing unit; Have four lip seal structures described in the claim 1; It comprises that also inner ring, magnetic dust cover, steel ball, retainer, outward flange dish, inner flange and knurled nut constitute; It is characterized in that: in the outward flange dish of hub, be provided with two row raceways on the circle, and also be respectively equipped with raceway on the cylindrical of the corresponding inner ring of two row raceways established and inner flange on the circle in the hub outward flange dish; Be contained in steel ball on the retainer; Successively two retainers are installed in respectively in the hub outward flange dish in the raceway between circle and inner ring and the inner flange cylindrical, last seal ring and magnetic dust cover cooperate be installed in the outward flange dish interior justify and an end of inner ring cylindrical between; Lower seal be installed in inner flange cylindrical and outward flange dish one end between, again with pack into the endoporus of inner flange of bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102651506A CN102777500A (en) | 2012-07-30 | 2012-07-30 | Hub bearing unit with four-lip seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102651506A CN102777500A (en) | 2012-07-30 | 2012-07-30 | Hub bearing unit with four-lip seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102777500A true CN102777500A (en) | 2012-11-14 |
Family
ID=47122545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102651506A Pending CN102777500A (en) | 2012-07-30 | 2012-07-30 | Hub bearing unit with four-lip seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102777500A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI512217B (en) * | 2013-07-30 | 2015-12-11 | Hiwin Tech Corp | Ball screw with magnetic dustproof device |
| CN108019519A (en) * | 2017-12-31 | 2018-05-11 | 无锡华洋滚动轴承有限公司 | Waterproof grommet for bearing |
| CN111422002A (en) * | 2019-01-09 | 2020-07-17 | 斯凯孚公司 | Wheel hub assemblies for vehicles |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056579A (en) * | 2001-08-10 | 2003-02-26 | Uchiyama Mfg Corp | Sealing device |
| JP2008008448A (en) * | 2006-06-30 | 2008-01-17 | Jtekt Corp | Sealing device of rolling bearing |
| US20080019624A1 (en) * | 2006-07-18 | 2008-01-24 | Jtekt Corporation | Sealing devices for bearings |
| JP2008014448A (en) * | 2006-07-07 | 2008-01-24 | Ntn Corp | Wheel bearing device and its manufacturing method |
| CN201827246U (en) * | 2010-10-28 | 2011-05-11 | 常州光洋轴承有限公司 | Sealing unit of hub bearing |
| CN202707792U (en) * | 2012-07-30 | 2013-01-30 | 湖北新火炬科技股份有限公司 | Hub bearing unit with four-lip sealing structure |
-
2012
- 2012-07-30 CN CN2012102651506A patent/CN102777500A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056579A (en) * | 2001-08-10 | 2003-02-26 | Uchiyama Mfg Corp | Sealing device |
| JP2008008448A (en) * | 2006-06-30 | 2008-01-17 | Jtekt Corp | Sealing device of rolling bearing |
| JP2008014448A (en) * | 2006-07-07 | 2008-01-24 | Ntn Corp | Wheel bearing device and its manufacturing method |
| US20080019624A1 (en) * | 2006-07-18 | 2008-01-24 | Jtekt Corporation | Sealing devices for bearings |
| CN201827246U (en) * | 2010-10-28 | 2011-05-11 | 常州光洋轴承有限公司 | Sealing unit of hub bearing |
| CN202707792U (en) * | 2012-07-30 | 2013-01-30 | 湖北新火炬科技股份有限公司 | Hub bearing unit with four-lip sealing structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI512217B (en) * | 2013-07-30 | 2015-12-11 | Hiwin Tech Corp | Ball screw with magnetic dustproof device |
| CN108019519A (en) * | 2017-12-31 | 2018-05-11 | 无锡华洋滚动轴承有限公司 | Waterproof grommet for bearing |
| CN111422002A (en) * | 2019-01-09 | 2020-07-17 | 斯凯孚公司 | Wheel hub assemblies for vehicles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 441004, Xinguang Road, automobile industrial park, Xiangyang hi tech Industrial Development Zone, Hubei 7, China Applicant after: The new torch Science and Technology Ltd. in Hubei Address before: 441004, Xinguang Road, automobile industrial park, Xiangyang hi tech Industrial Development Zone, Hubei 7, China Applicant before: Hubei New Torch Science & Technology Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: HUBEI NEW TORCH SCIENCE + TECHNOLOGY CO., LTD. TO: HUBEI NEW TORCH TECHNOLOGY CO., LTD. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121114 |