KR101857190B1 - Pack seal and wheel bearing for vehicle using the same - Google Patents
Pack seal and wheel bearing for vehicle using the same Download PDFInfo
- Publication number
- KR101857190B1 KR101857190B1 KR1020160014329A KR20160014329A KR101857190B1 KR 101857190 B1 KR101857190 B1 KR 101857190B1 KR 1020160014329 A KR1020160014329 A KR 1020160014329A KR 20160014329 A KR20160014329 A KR 20160014329A KR 101857190 B1 KR101857190 B1 KR 101857190B1
- Authority
- KR
- South Korea
- Prior art keywords
- disk
- sealing lip
- radially
- wheel
- axially
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/001—Hubs with roller-bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0073—Hubs characterised by sealing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
Abstract
A packed seal and a vehicle wheel bearing using the same are disclosed. A first disk fixed integrally to a first wheel mounted on the rotating body; A second disk mounted on the non-circulating body and fixed to the second wheel so as to be separated from the first disk to form a foreign matter intrusion path; And a sealing member for blocking the foreign object penetration path; Wherein the sealing member includes a first sealing lip extending radially and continuously in the circumferential direction so as to block the entrance of the foreign object intrusion path, the first sealing lip being provided to contact the first disk and the second disk, It is possible to effectively prevent intrusion of foreign matter while minimizing the amount of foreign matter.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pack seal and a vehicle wheel bearing using the same. More particularly, the present invention relates to a pack seal and a vehicle wheel bearing using the pack seal.
In general, a bearing is a device mounted between a rotating element and a non-rotating element to facilitate rotation of the rotating element. Currently, various bearings such as roller bearings, tapered roller bearings, needle bearings and ball bearings are used.
Wheel bearings are one kind of such bearings, and serve to rotatably connect a wheel (wheel), which is a rotating element, to an unrotated body or knuckle.
FIG. 1 is a cross-sectional view of an example of a vehicle wheel bearing equipped with a pack seal according to the prior art. The
The
Between the
A
The
The
The
The sealing
The
The sealing
The
The sealing
The
The sealing
The
However, in the conventional seal structure of the wheel bearing as described above, there is a drawback that the mud lip or the first sealing lip can not smoothly perform its function in harsh environments.
That is, the seam part is usually made of elastic material such as rubber material. When the temperature of the wheel bearing is extremely low, elasticity of the rubber material is deteriorated, and the intrusion of the foreign material is not effectively suppressed .
In addition, when a wheel bearing equipped with a pack seal receives an external impact while the vehicle is running, for example, a gap is instantly generated between the slinger and the mud lip, and there is always a possibility that foreign foreign matter may flow through the gap.
The embodiment of the present invention has been devised to overcome the above-mentioned problems, and it is an object of the present invention to provide a pack seal which can effectively exhibit sealing performance even under harsh environmental conditions by strengthening the function of a mud lip that firstly blocks the intrusion of foreign matter, We want to provide wheel bearings.
A packed seal according to an embodiment of the present invention comprises a first disk fixed to a first wheel mounted on a rotating body and integrally rotatably fixed to the first wheel, a second disk mounted on the non-rotating body and spaced apart from the first disk to form a foreign object penetration path, A second disk fixed to the wheel, and a sealing member for blocking the foreign matter intrusion path, wherein the sealing member has a root attached to the second disk and a root formed separately from the root, And a first sealing lip extending in the radial direction so as to be supported by and installed on the second disk and continuously formed in the circumferential direction to block the entrance of the foreign matter intrusion path.
Wherein an installation groove is formed in the inner circumferential surface of the second disk along a circumferential direction; And a part of the first sealing lip may be accommodated in the mounting groove.
Wherein the first sealing lip has a quadrangular cross-section having four corners, two corners located radially outward of the four corners are in line contact with the installation groove, and two corners located radially inward The edges of which can be in line contact with the first disk.
The first sealing lip includes an outer circumferential surface located radially outward and an inner circumferential surface located inside, respectively; The outer circumferential surface and the inner circumferential surface may each have a concave groove, and the four corners may be formed to be sharp.
The concave groove may be formed in a triangular shape.
delete
A root and a support seal attached to the second disc; The root and the support seal each have a latching protrusion formed thereon; The first seal lip may be formed with a latching groove through which the latching protrusions are inserted.
The first disk includes a first cylindrical portion mounted on an outer peripheral surface facing the radially outer side of the first wheel; A flange bent radially outward from an inner front end portion toward the axially inner side of the first cylindrical portion; And a second cylindrical portion bent toward the axially outward side from an outer end portion toward the radially outer side of the flange; A protruding portion protruding radially outwardly may be formed at an axially outward end portion of the second cylindrical portion of the first disc.
The protrusion may be located inside the foreign object penetration path more than the first sealing lip.
And the second seal lip may be formed integrally with the first seal lip in the radial direction and radially inward of the first seal lip so as to block the foreign matter entering path of the first disk.
The first disk includes a first cylindrical portion mounted on an outer peripheral surface facing the radially outer side of the first wheel; A flange bent radially outward from an inner front end portion toward the axially inner side of the first cylindrical portion; And a second cylindrical portion bent toward the axially outward side from an outer end portion toward the radially outer side of the flange; And the second sealing lip may be spaced apart from the radially inner side so as to form a first gap between the second sealing lip and the radially inner side of the second cylinder of the first disk.
The receiving groove, which is open toward the radially outward side, may be formed integrally with the second sealing lip axial inner front end portion.
The receiving groove having an outer side wall axially outwardly formed to extend radially; An inner wall positioned axially inward of the outer wall and extending radially; And a bottom surface extending axially so as to connect the outer side wall and the inner side wall, and may be continuously opened in the circumferential direction and open toward the radially outer side.
The inner side wall may be formed to have a lower height in the radial direction than the outer side wall.
The inner wall may be spaced apart from an outer surface of the flange of the first disk facing the axially outer side so that a second gap may be formed between the inner wall and the outer surface of the flange of the first disk.
A third sealing lip and a fourth sealing lip which are in close contact with the first disk are formed integrally with the root; The third sealing lip is formed to slant axially inward and radially inward in a direction blocking the foreign matter intrusion path; The fourth sealing lip may be inclined toward the axially outer side and the radially inner side in a direction blocking the leakage of the lubricant through the foreign matter entering path.
In a wheel bearing according to another embodiment of the present invention, the rotating body is a wheel hub connected to wheels; The first wheel is an inner wheel mounted integrally on an outer peripheral surface of the wheel hub; And the second wheel is an outer wheel that supports the wheel hub and the inner ring in an axially inward direction and relatively rotatably supporting the wheel hub and the inner wheel; And a rolling element is interposed between the inner ring and the outer ring.
An encoder may be attached to the first disc.
According to the pack seal according to the embodiment of the present invention, the dam lip for blocking the foreign matter intrusion path formed between the first disk and the second disk is formed to extend in the radial direction, and the foreign matter intrusion path The foreign matter is prevented from flowing into the wheel bearing through the path.
The dam lip has a rectangular cross section, and only its four corners are in line contact with the inner circumferential surface of the first disk and the outer circumferential surface of the second disk, thereby minimizing the drag loss due to the dam lip, thereby improving the performance of the wheel bearing have.
When the foreign matter adheres to the outer circumferential surface of the dam lip, the outer circumferential surface of the dam lip is seated on the outer circumferential surface of the first disk by the four linear grooves, and along the outer circumferential surface of the rotating first disk, So that it is possible to maximize the performance of preventing the intrusion of foreign matter by the dam lobe.
The main lips extending axially inward from the first disk toward the second disk are spaced apart from the second disk so that a labyrinth is formed therebetween so that the drag loss by the main lips is minimized , And the sealing performance can be further improved.
In addition, the receiving groove formed so as to open radially outwardly in the main lip allows the foreign matter passing through the dam lip to naturally drop along the bottom of the receiving groove to the ground by its own weight, thereby further enhancing the sealing performance have.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partially cut-away sectional view of a vehicle wheel bearing with a pack seal according to the prior art;
Fig. 2 is a partially cut-away sectional view of a vehicle wheel bearing equipped with a pack seal in an embodiment of the present invention.
3 is a cross-sectional view of a pack seal in accordance with an embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
2 and 3, a wheel bearing to which a pack seal according to an embodiment of the present invention is applied includes a
The
A spacing space of a proper size in the radial direction is provided between the
A pack seal (30) may be installed in the spaced space to block entry of foreign matter into the spaced space and to prevent leakage of lubricating oil inside the wheel bearing.
The spacing space may form a foreign matter intrusion path that can be introduced into the inside of the
The
The
The
The sealing
The
The sealing
The
An
The
The
Two
In order to form the four
Four
Since the
Even if two corners or four corners of the four
delete
delete
The
The
The
On the other hand, in order to increase the rigidity of the two latching
A
The
The
The main lip or the
The
The first gap a forms a labyrinth so that the
At the axially inner tip of the
The receiving
The receiving
The
The
A
The
The
The
The
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Various modifications and variations are possible within the scope of the appended claims.
10: Wheel hub
11: Inner ring
12: Outer ring
13:
30: Pack seal
30: Route
31: first disk
32: second disk
33: Sealing member
331: Route
332: First sealing lip
40: support seals
50; Encoder
Claims (19)
A second disk mounted on the non-circulating body and fixed to the second wheel so as to be separated from the first disk to form a foreign matter intrusion path; And
And a sealing member for blocking the foreign object intrusion path;
The sealing member
A root attached to the second disk; And
A first sealing lip which is formed separately from the route and extends radially so as to be supported by the first and second discs and is formed continuously in a circumferential direction so as to block the inlet of the foreign object entering path, ;
≪ / RTI >
Wherein an installation groove is formed in the inner circumferential surface of the second disk along a circumferential direction;
And a part of the first sealing lip is accommodated in the mounting groove.
Wherein the first sealing lip has a quadrangular cross section having four corners,
Wherein two corners radially outward of the four corners are in line contact with the mounting groove and two corners located radially inward are in line contact with the first disk.
The first sealing lip includes an outer circumferential surface located radially outward and an inner circumferential surface located inside, respectively;
Wherein the outer circumferential surface and the inner circumferential surface are each formed with a concave groove so that the four corners are sharpened.
Wherein the concave groove is formed in a triangular shape.
A support seal attached to the second disc;
The root and the support seal each have a latching protrusion formed thereon;
Wherein the first sealing lip is formed with a latching groove through which the latching protrusions are inserted.
Wherein the first disk comprises:
A first cylindrical portion mounted on an outer circumferential surface facing the radially outward side of the first wheel;
A flange bent radially outward from an inner front end portion toward the axially inner side of the first cylindrical portion; And
And a second cylindrical portion bent toward an axially outer side from an outer end portion toward the radially outer side of the flange;
Wherein a radially outwardly projecting protrusion is formed at an axially outward end of the second cylindrical portion of the first disc.
And the protruding portion is located inside the foreign object penetration path more than the first sealing lip.
And a second sealing lip integrally protruding from the first disk in a direction radially inward of the first sealing lip and blocking the foreign matter entering path of the first disk.
Wherein the first disk comprises:
A first cylindrical portion mounted on an outer circumferential surface facing the radially outward side of the first wheel;
A flange bent radially outward from an inner front end portion toward the axially inner side of the first cylindrical portion; And
And a second cylindrical portion bent toward an axially outer side from an outer end portion toward the radially outer side of the flange;
And the second sealing lip is spaced from the radially inner side so as to form a first gap between the second sealing lip and the radially inner side of the second cylindrical portion of the first disk.
And a receiving groove opened radially outward is formed integrally with the second sealing lip axial inward distal end portion.
The receiving groove
An outer side wall axially outwardly formed to extend in a radial direction;
An inner wall positioned axially inward of the outer wall and extending radially; And
And a bottom surface extending axially so as to connect the outer side wall and the inner side wall, wherein the bottom surface is open radially outwardly and continuously in the circumferential direction.
Wherein the inner side wall is formed to have a lower height in the radial direction than the outer side wall.
Wherein the inner side wall is spaced apart from an outer side face axially outward of the flange of the first disk and a second gap is formed between the inner side wall and the outer side face of the flange of the first disk. .
A third sealing lip and a fourth sealing lip which are in close contact with the first disk are formed integrally with the root;
The third sealing lip is formed to slant axially inward and radially inward in a direction blocking the foreign matter intrusion path;
And the fourth sealing lip is formed to be inclined toward the axially outer side and the radially inner side in a direction blocking the leakage of the lubricant through the foreign matter intrusion path.
Wherein the root and the retaining projections of the support seal are cured.
The rotating body is a wheel hub connected to wheels;
The first wheel is an inner wheel mounted integrally on an outer peripheral surface of the wheel hub;
And the second wheel is an outer wheel that supports the wheel hub and the inner ring in an axially inward direction and relatively rotatably supporting the wheel hub and the inner wheel;
And a rolling member is interposed between the inner ring and the outer ring.
And an encoder is attached to the first disk.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160014329A KR101857190B1 (en) | 2016-02-04 | 2016-02-04 | Pack seal and wheel bearing for vehicle using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160014329A KR101857190B1 (en) | 2016-02-04 | 2016-02-04 | Pack seal and wheel bearing for vehicle using the same |
Publications (2)
Publication Number | Publication Date |
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KR20170092973A KR20170092973A (en) | 2017-08-14 |
KR101857190B1 true KR101857190B1 (en) | 2018-06-25 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020160014329A KR101857190B1 (en) | 2016-02-04 | 2016-02-04 | Pack seal and wheel bearing for vehicle using the same |
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KR (1) | KR101857190B1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013190081A (en) * | 2012-03-15 | 2013-09-26 | Jtekt Corp | Rolling bearing device |
JP2015110958A (en) * | 2013-12-06 | 2015-06-18 | Ntn株式会社 | Sealing device and wheel bearing device equipped with the same |
-
2016
- 2016-02-04 KR KR1020160014329A patent/KR101857190B1/en active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013190081A (en) * | 2012-03-15 | 2013-09-26 | Jtekt Corp | Rolling bearing device |
JP2015110958A (en) * | 2013-12-06 | 2015-06-18 | Ntn株式会社 | Sealing device and wheel bearing device equipped with the same |
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Publication number | Publication date |
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KR20170092973A (en) | 2017-08-14 |
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