KR101857190B1 - Pack seal and wheel bearing for vehicle using the same - Google Patents

Pack seal and wheel bearing for vehicle using the same Download PDF

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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
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KR
South Korea
Prior art keywords
disk
sealing lip
radially
wheel
axially
Prior art date
Application number
KR1020160014329A
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Korean (ko)
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KR20170092973A (en
Inventor
이지현
Original Assignee
주식회사 일진글로벌
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Priority to KR1020160014329A priority Critical patent/KR101857190B1/en
Publication of KR20170092973A publication Critical patent/KR20170092973A/en
Application granted granted Critical
Publication of KR101857190B1 publication Critical patent/KR101857190B1/en

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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
    • 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
    • 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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (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 [0001] The present invention relates to a pack seal,

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 inner wheel 11 is mounted on the outer circumferential surface of a wheel hub 10 connected to a rotating wheel, , The outer ring (12) is arranged so as to enclose the inner wheel (11) and the wheel hub (10) in the axial direction.

The outer ring 12 is connected to a non-rotating body or knuckle.

Between the outer ring 12 and the inner wheel 11 and the wheel hub 10 so that the inner wheel 11 fitted in the outer ring 12 in the axial direction and the wheel hub 10 can be relatively rotated relative to the outer ring 12 The inner wheel 11 and the wheel hub 10 are connected to the outer ring 12 via the rolling member 13 via the rolling member 13, And is supported rotatably.

A pack seal 20 is installed in the spaced space to block the entry of foreign matter into the spaced space and to prevent the leakage of lubricating oil inside the wheel bearing.

The pack seal 20 includes a slinger or a first disk 21 which is inserted into the spacing space and is mounted on the outer circumferential surface of the inner ring 11 so as to be rotated integrally with the first disk 21, A second disk 22 fixedly mounted on the inner circumferential surface of the outer ring 12 and a second disk 22 fixed to the inner circumferential surface of the second disk 22 to prevent foreign matter from entering into the gap between the first disk 21 and the second disk 22, 22, respectively.

The first disk 21 has a first cylindrical portion 211 mounted on the outer circumferential surface facing the radially outer side of the inner ring 11 and a second cylindrical portion 211 radially outward from the inner front end portion in the axial direction of the first cylindrical portion 211 And includes a bent second flange 212 and a second cylindrical portion 213 that is bent at a substantially right angle from the outer radial outward end of the first flange 212 toward the axially outward side.

The second disk 22 has a cylindrical portion 221 fixedly mounted on an inner circumferential surface facing the radially inward side of the outer ring 12, and a second disk 22 bent toward the radially inward side from the axially outward outer end portion of the cylindrical portion 221 Respectively, of the first flange 222 and the second flange 222, respectively.

The sealing member 23 has an inner side surface facing the radially inward side of the cylindrical portion 221 of the second disk 22 and an inner side surface facing the inward axial direction of the second flange 222 of the second disk 22 0.0 > 231 < / RTI >

The root 231 may be formed so as to surround a distal end face of the second disk 22 facing the radially inward side of the second flange 222, And overlaps with a part of the outer circumferential surface of the cylindrical portion 221 in the radial direction.

The sealing member 23 is provided with a mud lip or a first sealing lip 232 which is extended from the root 231 and is in close contact with the outer surface of the first cylindrical portion 213 facing the radially outer side of the second cylindrical portion 213 .

The first sealing lip 232 is disposed in a direction blocking the penetration of foreign matter from the root 231 in order to block intrusion of foreign matter through a gap between the first disk 21 and the second disk 22, And is inclined toward the inner side and the radially inward side.

The sealing member 23 includes a second sealing lip 233 extending from the root 231 and brought into close contact with the outer side surface in the axial direction of the first flange 212 of the first disk 21 and a third sealing lip 233 234).

The second sealing lip 233 and the third sealing lip 234 are formed so as to be inclined from the root 231 in the direction blocking the penetration of foreign matter through the gap, i.e., axially inward and radially outward.

The sealing member 23 includes a fourth sealing lip 235 that extends from the root 231 and is in close contact with the radially outwardly facing outer surface of the first cylindrical portion 211 of the first disk 21.

The fourth sealing lip 235 is formed sloping from the root 161 toward the axially outward side and the radially inward side to block the leakage of the lubricant through the gap.

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.

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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 wheel hub 10 fastened to a rotating body such as a wheel, And a second wheel or an outer ring 12 mounted in such a manner as to enclose the inner wheel 11 and the wheel hub 10 axially inwardly .

The outer ring 12 can be fixedly connected to a vehicle body or knuckle which does not rotate.

A spacing space of a proper size in the radial direction is provided between the outer ring 12 and the inner wheel 11 and the wheel hub 10 so that the inner wheel 11 and the wheel hub 10 can relatively rotate relative to the outer ring 12 The inner ring 11 and the wheel hub 10 are supported by the outer ring 12 so as to be relatively rotatable via the rolling member 13 with the rolling member 13 interposed in the spacing space.

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 pack seal 30 of an external foreign matter.

The pack seal 30 includes a slinger or a first disk 31 inserted into the spacing space and mounted to rotate integrally with the outer circumferential surface of the inner ring 11, A second disk 32 fixedly mounted on the inner circumferential surface of the outer ring 12 so as to face the first disk 31 and the second disk 32 so as to face each other in a direction away from the first disk 31 and the second disk 32, And a sealing member 33 attached to the second disk 32 to prevent leakage of the sealing member 33. [

The first disk 31 has a first cylindrical portion 311 mounted on the outer circumferential surface of the inner ring 11 facing the radially outward side of the first disk 31 and a second cylindrical portion 311 radially outward from the inner front end portion in the axial direction of the first cylindrical portion 311 And may include a bent flange 312 and a second cylindrical portion 313 that is bent outwardly in the axial direction from an outer radial outward end portion of the flange 312.

The second disk 32 has a cylindrical portion 321 fixedly mounted on the inner peripheral surface facing the radially inward side of the outer ring 12 and a bending portion 322 bending toward the radially inward side from the outer end portion facing the axially outward side of the cylindrical portion 321 Flanges 322, respectively.

The sealing member 33 is provided on the inner side surface of the second disk 32 facing the radially inward side of the cylindrical portion 321 and on the inner side surface facing the inward axial direction of the flange 322 of the second disk 32 And may include an attached root 331.

The first disc 31 and the second disc 32 are spaced apart from each other in the axial direction and the radial direction so that a foreign matter penetration path toward the inside of the pack seal is provided between the first disc 31 and the second disc 32. [ Can be formed.

The sealing member 33 may include a first sealing lip 332 or a mud lip to block the inlet in front of the foreign matter intrusion path.

The first sealing lip 332 is mounted on the outer surface of the second cylindrical portion 313 of the first disk 31 and the inner surface of the cylindrical portion 321 of the second disk 32 facing the outer surface of the second cylindrical portion 313, .

An installation groove 321a for mounting the first sealing lip 332 is formed on the inner side surface of the cylindrical portion 321 of the second disk 32 in a radially outwardly wedged manner, A part of the first sealing lip 332 may be inserted.

The first sealing lip 332 may be formed in a ring shape continuous in the circumferential direction.

The first sealing lip 332 may be formed to have a generally quadrangular cross section in the radial direction.

Two corners 332a located radially outward of the quadrangular cross section of the first sealing lip 332 may be formed to be in line contact with the bottom surface of the installation groove 321a, The two corners 332b positioned on the inner side can be formed to be in close contact with the outer peripheral surface of the cylindrical portion 313 of the first disk.

In order to form the four sharp edges 332a and 332b on the first sealing lip 332, the outer peripheral surface located on the radially outer side of the first sealing lip 332 and the inner peripheral surface located on the inner side are formed with concave A groove 332c may be formed.

Four corners 332a and 332b are formed in the first sealing lip 332 and the corners 332a and 332b are formed on the first disk 31 and the cylindrical portion 321 of the second disk 32, The drag resistance by the first sealing lip 332 can be minimized and the wheel bearing performance can be improved.

Since the first sealing lip 332 is provided to completely block the entrance of the foreign object penetration path between the first disk 31 and the second disk 32, There is no possibility of flowing into the inside of the pack seal 30 through the gap between the two disks 32. [

Even if two corners or four corners of the four corners 332a and 332b of the first sealing lip 332 are worn out, the first sealing lip 332 and the second cylindrical portion of the first disk 31 313, and the bottom surface of the first sealing lip 332 and the bottom surface of the mounting groove 321a are formed, so that foreign matter penetration can be effectively prevented.

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The first sealing lip 332 may be formed with an engagement groove 332e formed inwardly at a generally central portion along the radial direction or the longitudinal direction.

The root 331 may be provided with a latch projection 331a which is inserted into the latch groove 332e and a part of the radially outer side surface of the cylindrical portion 321 of the second disk 32 and a part of the inner side surface And a locking projection 401 may be formed in the supporting seal 40 to be inserted into the locking groove 332e to be engaged therewith.

The first sealing lip 332 is moved in the spacing space between the first disk 31 and the second disk 32 by the mutual engaging action between the engaging groove 332e and the two engaging protrusions 331a and 401, The sealing performance by the first sealing lip 332 can be improved by keeping the stable posture without flowing in the axial direction.

On the other hand, in order to increase the rigidity of the two latching projections 331a and 401 and improve the supporting force of the first sealing lip 332, the two latching projections 331a and 401 are cured Processing can be performed.

A protrusion 313a protruding outward in the radial direction may be provided on the axially outer end of the second cylindrical portion 313 of the first disc 31. [

The protrusion 313a may be formed so as to protrude more radially outward than the two inner corner portions 332b of the first sealing lip 332. [

The protrusion 313a is positioned inside the foreign object penetration path and functions as a blocking protrusion protruding into the foreign object penetration path to block foreign matter from entering, thereby improving the sealing performance of the pack seal 30 .

The main lip or the second sealing lip 333 protrudes integrally from the root 331 in the radial direction inside the first sealing lip 332 toward the first disk, .

The main lip 333 is disposed to be spaced apart from the radially inner side of the second cylindrical portion 313 so as to form a very narrow first gap a between the radially inner side of the second cylindrical portion 313 .

The first gap a forms a labyrinth so that the main lip 333 does not contact the first disk 31 and thus the drag force of the main lip 333 is eliminated, Thereby improving the sealing performance.

At the axially inner tip of the main lip 333, a receiving groove 333a opened radially outward can be integrally formed.

The receiving groove 333a includes an outer side wall 333b located axially outwardly and extending in the radial direction and an inner side wall 333d and an outer side wall 333b formed axially inward of the outer side wall 333b and extending radially, And has a bottom surface 333c formed to extend axially so as to connect the inner side wall 333d with the inner side wall 333d, and may have a substantially U-shaped cross section and be formed continuously in the circumferential direction.

The receiving groove 333a temporarily receives the foreign matter introduced through the first gap a and naturally falls down to the ground by its own weight, thereby improving the sealing performance.

The inner side wall 333d is formed to have a lower height in the radial direction than the outer side wall 333b and the height difference b may be formed between the inner side wall 333d and the outer side wall 333b.

The inner side wall 333d is spaced apart from the outer side surface of the flange 312 of the first disk 31 in the axial direction so as to be spaced apart from the inner wall 333d and the flange 312 of the first disk 31 A second gap (c) may be formed between the outer side surfaces, and the second gap (c) may also form a labyrinth to improve the sealing performance.

A third sealing lip 334 and a fourth sealing lip 335 which are extended from the root 331 and come into close contact with the outer circumferential surface of the first disk 31 toward the radially outward side of the first cylindrical portion 311 have.

The third sealing lip 334 may be inclined inwardly in the axial direction and inward in the radial direction in the direction of blocking the foreign matter intrusion path.

The fourth sealing lip 335 may be inclined from the root 331 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.

The encoder 50 can be attached to the inner surface of the first disk 31 facing the axially inward side of the flange 312 so as to rotate integrally.

The encoder 50 is constituted by permanent magnets arranged alternately so that the N pole and the S pole are annular, and generates a change in the magnetic field while rotating together with the first disk 21 when the inner ring 11 rotates. And can be used to measure the rotational speed of the wheel by detecting a change in the magnetic field through a sensor (not shown).

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 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
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 > The method according to claim 1,
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. 3. The method of claim 2,
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 method of claim 3,
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. 5. The method of claim 4,
Wherein the concave groove is formed in a triangular shape. delete The method according to claim 1,
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. The method according to claim 1,
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. 9. The method of claim 8,
And the protruding portion is located inside the foreign object penetration path more than the first sealing lip. 8. The method of claim 7,
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. 11. The method of claim 10,
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. 12. The method of claim 11,
And a receiving groove opened radially outward is formed integrally with the second sealing lip axial inward distal end portion. 13. The method of claim 12,
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. 14. The method of claim 13,
Wherein the inner side wall is formed to have a lower height in the radial direction than the outer side wall. 14. The method of claim 13,
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. . 8. The method of claim 7,
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. 8. The method of claim 7,
Wherein the root and the retaining projections of the support seal are cured. A packed seal according to any one of claims 1 to 5 and 7 to 17,
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. 19. The method of claim 18,
And an encoder is attached to the first disk.
KR1020160014329A 2016-02-04 2016-02-04 Pack seal and wheel bearing for vehicle using the same KR101857190B1 (en)

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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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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

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KR20170092973A KR20170092973A (en) 2017-08-14
KR101857190B1 true KR101857190B1 (en) 2018-06-25

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Citations (2)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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