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KR101826200B1 - Slinger structure and wheel bearing assembly provided the same - Google Patents

Slinger structure and wheel bearing assembly provided the same Download PDF

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Publication number
KR101826200B1
KR101826200B1 KR1020160062868A KR20160062868A KR101826200B1 KR 101826200 B1 KR101826200 B1 KR 101826200B1 KR 1020160062868 A KR1020160062868 A KR 1020160062868A KR 20160062868 A KR20160062868 A KR 20160062868A KR 101826200 B1 KR101826200 B1 KR 101826200B1
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KR
South Korea
Prior art keywords
support
radial
flange
slinger
radially
Prior art date
Application number
KR1020160062868A
Other languages
Korean (ko)
Other versions
KR20170131974A (en
Inventor
박민철
Original Assignee
주식회사 일진글로벌
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Filing date
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Priority to KR1020160062868A priority Critical patent/KR101826200B1/en
Publication of KR20170131974A publication Critical patent/KR20170131974A/en
Application granted granted Critical
Publication of KR101826200B1 publication Critical patent/KR101826200B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • 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
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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
    • 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
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
    • 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
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • 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
    • F16C19/181—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 with angular contact
    • F16C19/183—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 with angular contact with two rows at opposite angles
    • F16C19/184—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 with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—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 with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A wheel bearing assembly according to an embodiment of the present invention includes a flange, a hub having a slinger mount portion extending axially from the flange, and an outer ring rotating relative to the hub. Wherein the slinger structure mounted on the hub for reducing the bearing torque of the wheel bearing assembly includes a radial extension extending radially outwardly and axially to one side and having a radially outer end in contact with the flange; A connecting portion extending from an inner radial side of the radial extending portion to an outer peripheral side of the slinger mounting portion; And a lower bent portion whose one end extends in the axial direction from the connecting portion and which is press-fitted into the outer peripheral surface of the slinger mounting portion, whereby the slinger structure is firmly attached to the hub, while stably contacting the lips, The castle can be secured continuously.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a slinger structure,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle slinger structure and a vehicle wheel bearing assembly using the same, and more particularly, to a slinger structure provided between a wheel hub and an outer ring, .

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 ball bearings, tapered bearings, and needle bearings are used.

Wheel bearings are one type of such bearings and serve to rotatably connect the wheel, which is a rotating element, to the vehicle body which is a non-rotating element. The upper wheel bearing includes an inner ring (and / or hub) connected to either the wheel or the vehicle body, an outer ring connected to the other one of the wheel or the vehicle body, and a rolling member interposed between the outer ring and the inner ring.

These wheel bearings are basically mounted on the wheels of the vehicle, and thus are exposed to foreign substances such as dust and moisture. If the foreign matter enters the interior of the wheel bearing, particularly the portion where the rolling element is mounted, it may damage the raceway as a polishing surface. Such a damaged raceway may cause noise and vibration during operation of the wheel bearing and shorten the life of the wheel bearing. Therefore, a sealer is mounted at one end or both ends of the wheel bearing to prevent foreign matter from entering from the outside. In particular, a sealer sealing the gap between the outer ring and the hub may be provided in the wheel bearing.

The wheel bearing according to the prior art includes a hub and an outer ring spaced radially from the hub by a certain space, and one end of the upper hub extends radially in the flange. These wheel bearings have an open seal-type sealing structure. The sealing structure of the open seal type has a structure in which a sealing member having a plurality of lips is mounted on one end of the outer ring, and the plurality of lips are brought into contact with the hub to prevent foreign matter from intruding from the outside.

However, according to this open seal type, there is a problem that the drag torque of the bearing is deteriorated by the lip contacting directly with the hub, so that the fuel consumption is reduced. In recent years, a sealing structure has been studied in which a slinger is mounted on one side of a flange to make contact with the upper lip.

However, as the slinger thus mounted moves away from the one surface of the flange with time, there arises a problem that foreign substances intrude into the separated space. When foreign matter enters the inside of the slinger, corrosion occurs at the contact portion between the slinger and the flange, and this corrosion weakens the adhesion between the slinger and the hub, and enlarges the gap. As a result, the amount of interference of the lips contacting the slinger may also fluctuate, which may deteriorate the sealing performance or the drag torque of the bearing. Furthermore, if external foreign matter continuously flows into the upper gap and corrosion is intensified, the slinger may be detached from the hub.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a slinger having an inner circumferential surface and an outer circumferential surface of a hub on which the slinger is mounted, And it is an object of the present invention to provide a slinger structure in which a slinger structure is rigidly mounted on a hub by increasing the amount of interference with a flange when the slinger is mounted by providing a slope on one side of the slinger, and a vehicle wheel bearing assembly using the slinger structure.

In order to achieve the above object, a wheel bearing assembly according to an embodiment of the present invention may include a flange, a hub having a slinger mounting portion extending axially from the flange, and an outer ring rotating relative to the hub. The slinger structure mounted on the hub for reducing the bearing torque of the wheel bearing assembly has a radially inner end spaced from the flange, an outer radial end thereof contacting the flange, an outer radial side and an axially one side inclined A connecting portion extending from an inner radial side of the radial extending portion to an outer peripheral side of the slinger mounting portion; And an outer support including one end thereof extending axially from the connection portion and a lower bent portion being press-fitted into the outer peripheral surface of the slinger mounting portion.

The lower bending portion includes one end close to the flange and the other end opposite to the flange, and one end of the lower bending portion is formed radially inward of the other end of the lower bending portion.

A spacing space is formed between the radial extending portion and the flange and an innermost radius end of the radial extending portion is spaced apart from the flange by 0.01 mm or more and 2.0 mm or less.

A difference between a distance between one end of the lower bent portion and a distance between the other end of the lower bent portion and the rotation axis of the hub is 0.05 mm or more and 0.3 mm or less.

An upper bent portion curvedly extended from the radially outer end of the radial extending portion toward the outer ring; As shown in FIG.

And an impact absorbing portion formed at one of the radial extension portion or the connection portion of the outer support and formed to be convex from the outer support to the flange side so as to absorb shock or vibration applied to the outer support .

And the shock absorbing portion may be formed between the radial extending portion and the connecting portion.

And a shock absorbing portion formed between the radial extending portion and the connecting portion and formed to protrude in a direction opposite to the flange side from the outer supporting body.

The wheel bearing assembly according to an embodiment of the present invention includes: an inner support mounted on one end of the outer ring; And a sealing member enclosing a part of the inner support and including at least one lip protruding from the inner support, wherein the inner support is press-fitted into the outer peripheral surface of one end of the outer ring and extends in the axial direction A first radial supporting portion bent from one end of the axial supporting portion and extending radially inward and contacting one end of the outer ring; An inclined portion extending from an inner radial side of the first radial supporting portion to an inner side in the radial direction and an other side in the axial direction; And a second radial support extending further radially inward from a radially inner end of the ramp.

A sealing dam protruding radially outward from the other end of the axial support; And an extension surrounding the radially inner end of the inner support, wherein one side of the sealing dam extends vertically outwardly in a radial direction, the other side of the sealing dam is formed to be inclined to the radially inner side and the other axial side, And a first collecting space for collecting external foreign substances falling on the other surface of the sealing dam is formed between the other surface of the sealing dam and the outer ring.

The lip portion being adapted to surround the axial support portion and extending from the radially inward end of the sealing dam to one side in the axial direction and extending further toward the flange side than one end of the axial support portion; And an end portion mounted on the first radial supporting portion and extending toward the upper bending portion side of the outer supporting body and formed in a pocket shape having an opened upper portion, the first bending portion being inserted between the upper bending portion and the first radial supporting portion And a pocket lip in which a third trapping space is formed to stack the foreign substances.

The lip portion extending from the second radial support portion and contacting the outer support, the first lip extending radially outwardly and axially to one side to form a fourth collection space; A second chamber located radially inward of the first chamber and extending from the second radial support to contact the outer support and forming a fifth collection space with the first chamber; And a grease extending inwardly and radially outwardly of the radially inner end of the inner support with an inclination toward the other side; As shown in FIG.

The flange extends straightly outwardly from the hub to a portion where the outer support contacts with the outer support and extends radially outward from the portion where the outer support comes into contact with the outer side in the axial direction and outward in the radial direction.

And a second collecting space is formed between the flange and the upper bent part to collect external foreign matter and drop the ground to the ground when the flange rotates.

The lower bending portion is mounted on the slinger mounting portion formed on the hub, and the slinger mounting portion is formed to be inclined to the other side in the axial direction and outward in the radial direction.

Wherein the slinger mounting portion is formed on an outer circumferential surface thereof and includes a slinger mounting surface on which the lower bent portion is mounted, wherein one end and the other end of the slinger mounting surface are formed at positions corresponding to one end and the other end of the lower bent portion, And one end of the slinger mounting surface is formed inside the radius of 0.05 mm or more and 0.35 mm or less than the other end of the slinger mounting surface.

The lower bending portion before press-fitting into the hub may have a radius at least 0.1 mm smaller than the radius of the slinger mounting surface so as to be radially inwardly compressed by the slinger mounting portion.

As described above, according to the embodiment of the present invention, the inner circumferential surface of the slinger is rigidly press-fitted to the hub, and one surface of the inner surface is closely attached to the hub. Thus, the slinger can be prevented from being detached from the hub by an external shock or vibration. Further, since the slinger is strongly brought into contact with the hub, the inflow of external foreign matter is significantly cut off, and the corrosion occurring inside the slinger can be remarkably suppressed. Further, the ribs contact the slinger by a predetermined amount of interference to meet the expected sealing performance, while reducing variations in the bearing torque. In addition, by forming the shock absorbing portion in a part of the slinger, even when an external shock or vibration is applied to the slinger, the slinger responds flexibly accordingly. As a result, while the slinger is firmly mounted on the hub, the stable contact of the ribs is ensured, thereby ensuring constant sealing performance.

1 is a cross-sectional view of a wheel bearing assembly according to an embodiment of the present invention.
2 is an enlarged view of a portion "A" in Fig.
3 is a cross-sectional view showing a state before the outer support of the wheel bearing assembly according to the embodiment of the present invention is assembled to the hub.
4 is a slinger structure applied to a vehicle wheel bearing assembly according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

For convenience of explanation, the axially closer side (left side in the figure) of the wheel is referred to as "one side", "one side", "one side" Quot; other side ", " other end ", " other end "

The parts denoted by the same reference numerals throughout the specification mean the same or similar components.

1 is a cross-sectional view of a wheel bearing assembly according to an embodiment of the present invention.

The wheel bearings shown in FIG. 1 illustrate one of various kinds of wheel bearings for convenience of description. The technical idea of the present invention is not limited to the wheel bearings exemplified in this specification, Bearing assembly.

1, a wheel bearing assembly 1 according to an embodiment of the present invention includes a hub 10, an inner ring 11 press-fitted into the outer peripheral surface of the hub 10, a hub 10, A first rolling member 13 provided between the hub 10 and the outer ring 12 and a second rolling member 13 provided between the outer ring 12 and the inner ring 11 And a sealing cap 40 mounted on the other side of the outer ring 12 so as to block foreign substances introduced into the space between the hub 10 and the outer ring 12.

The hub 10 includes a pilot 18 from one side thereof, a disk-shaped flange 15 extending radially outward, a slinger mounting portion 16 extending flat from the flange 15 to the other side, a slinger mounting portion 16 And an inner ring mounting portion 35 formed on the outer circumferential surface of the other side of the hub 10 and straddled radially inwardly of the intermediate portion 25 from the other side of the intermediate portion 25 in a radial direction, .

On one surface of the flange 15, a pilot 18 protrudes in the axial direction. The pilot 18 serves to guide the wheel when mounting the wheel on the flange 15.

A bolt hole 17 is formed in the flange 15 and the hub bolt 19 is fixedly attached to the bolt hole 17. The hub bolt 19 may be provided with a brake disc or a wheel not shown in the figure.

A curved surface of the hub raceway 31 is formed between the slinger mounting portion 16 and the intermediate portion 25 so that the outer peripheral surface of the intermediate portion 25 from the other end of the hub raceway 31 is substantially It is flat.

In the embodiment of the present invention, the hub raceway 31 is directly formed on the outer circumferential surface of the wheel hub 10, but the present invention is not limited thereto. That is, instead of using the hub raceway 31, an inner raceway can be formed on a separate inner ring. That is, two inner rings can be mounted on the hub 10 and an inner raceway can be formed on the outer peripheral surface of each of the inner rings.

The inner ring is press-fitted into the inner ring mounting portion 35 and the bending portion 50 is formed on the other side of the inner ring mounting portion 35 so as to extend radially outwardly by orbital forming. The bending portion 50 is mounted on the hub 10 (Axial force) to the rolling elements 13 and 14 while fixing the inner ring 11 in the axial direction.

The inner ring 11 has a cylindrical shape, and an inner race raceway 32 is formed on the outer peripheral surface thereof. The inner ring 11 is forcibly press-fitted into the inner ring mounting portion 35 of the hub 10 and the inner ring 11 forcibly press-fitted is firmly fixed by the bent portion 50. [ However, the method of fixing the inner ring 11 to the hub 10 is not limited thereto. For example, after the inner ring 11 is forcibly press-fitted into the stepped portion of the hub 10, a nut is separately provided on the other end surface of the inner ring 11 so that the bolt supported by the one side of the hub 10, The inner ring 11 can be attached to the hub 10.

A disk 23 is mounted on the other side of the inner ring 11 and an encoder 21 is attached to the disk 23. The encoder 21 is formed by alternately arranging N and S poles so as to form an annulus, and may be made of a permanent magnet. When the inner ring 11 rotates, the encoder 21 rotates together with the disk 23 to generate a periodic change of the magnetic field, and the periodic change of the magnetic field is sensed through the sensor, .

The outer ring 12 is formed into a hollow cylindrical shape so as to surround the outer circumferential surface of the hub 10. That is, a hollow in which the hub 10 and the inner ring 11 are inserted is formed inside the radius of the outer ring 12 along the central axis. The outer ring flange 39 is formed on the outer circumferential surface of the outer ring 12 so as to extend radially outward. The outer ring flange 39 has an outer ring bolt hole 37 for mounting the wheel bearing 1 on the vehicle body (particularly, the knuckle) Respectively.

The first and second outer race raceways 41 and 42 are formed on inner circumferential surfaces of both ends of the outer race 12. The first outer race raceway 41 formed on the inner peripheral surface of the one end of the outer race 12 is formed to face the hub raceway 31 with respect to each other. The second outer race raceway 42 formed on the inner peripheral surface of the other end of the outer race 12 is formed so as to face the inner race raceway 32.

The first rolling member 13 is provided between the hub raceway 31 and the first outer race raceway 41 and the second rolling member 14 is provided between the inner race raceway 32 and the second outer race raceway 42). A ball or a roller may be used for the first rolling member 13 and the second rolling member 14.

Each of the ball bearings including the first and second rolling elements 13 can be spaced apart from each other by a retainer or a cage 18 at regular intervals in the circumferential direction.

The sealing cap 40 is coupled to the other side of the outer ring 12 to close the radial space between the outer ring 12 and the inner ring 11 and / or between the outer ring 12 and the hub 10, (Such as dust or moisture).

The wheel bearing assembly 1 according to the embodiment of the present invention further includes a slinger structure 100 for sealing between the hub 10 and the outer ring 12 at one side of the outer ring 12. The slinger structure 100 will be described in more detail with reference to FIG. 2 is an enlarged view of a portion "A" in Fig.

2, a slinger structure 100 according to an embodiment of the present invention includes an inner support 70, a sealing member 80, and an outer support 101. As shown in FIG.

The inner support 70 includes an axially supporting portion 71, a first radial support portion 72, an angled portion 73, and a second radial support portion 74.

The axial support portion 71 is press-fitted into the outer peripheral surface of one end of the outer ring 12 and extends in the axial direction. At the other end of the axial support portion 71, a pointed portion 71a having a tapered shape is formed. The pointed portion 71a is formed while extending from the portion where the axial support portion 71 contacts the outer circumferential surface of the outer ring 12 to the outer side of the radius and outwardly in the radial direction and does not contact the outer ring 12. This allows the sealing member 80 to be prevented from being separated from the inner support 70 by allowing the sealing member 80 to wrap the upper pointed portion 71a when the sealing member 80 is injected.

The first radial support portion 72 is bent radially inwardly from one end of the axial support portion 71 and is in contact with one end of the outer ring 12.

The inclined portion 73 extends obliquely from the radially inner end of the first radial support portion 72 to the radially inner side and the other axial side and the second radial support portion 74 extends from the radially inner end of the inclined portion 73 Direction.

The sealing member 80 is formed to enclose the outer circumferential surface of the axial supporting portion 71 and at least a part of the first radial supporting portion 72, the inclined portion 73 and the second radial supporting portion 74. The sealing member 80 may be formed of a rubber member or a similar material.

The sealing member 80 includes a sealing dam 81 and an extension portion 82.

The sealing dam 81 is formed to enclose the axial supporting portion 71 and the sharpened portion 71a and extends radially outward from the other end of the axial supporting portion 71. [ As described above, by forming the sealing dam 81 to extend radially outwardly, foreign matter introduced from the other side in the axial direction is effectively blocked. Since the sealing dam 81 is extended radially outwardly, it is likely to be deformed, and therefore the thickness of the sealing dam 81 should be increased.

However, as in the embodiment of the present invention, the lower portion of the sealing dam 81 may be thickened and the upper portion thereof may be formed in a thinner lowered shape so as to reduce the volume of the sealing dam 81 and reduce the manufacturing cost. At this time, the other surface 85 of the sealing dam 81 is formed so as to be inclined to the radially inner side and the other axial side. Therefore, external foreign matter coming from the other side in the axial direction is repelled by colliding with the sealing dam 81, or is collected on the other surface 85 into the first collecting space S1. The foreign matter collected in the first collecting space S1 naturally falls to the ground.

The extension portion 82 is formed in a shape surrounding the second radial support portion 74 at the radially inner end of the sealing member 80 to prevent the sealing member 80 from being detached from the inner support body 70.

At one end of the sealing member 80, a lip portion 90 including a plurality of protrusions is extended to one side or the outer side support 101.

The lip portion 90 includes a protruding lip 91, a pocket lip 92, first and second housings 93 and 94, and a grease lip 95 sequentially from the radially outer side thereof.

The protruding lip 91 covers the outer peripheral surface of the axial supporting portion 71 and extends further from the one side of the axial supporting portion 71 to the other side of the flange 15. The protruding ribs 91 serve to primarily block external foreign matter. Therefore, foreign matter entering from the outside of the upper radial direction or foreign matter passing over the sealing dam 81 from the axial direction is blocked.

The pocket lip 92 is formed in an axial space between the upper bending portion 110 and the protruding lip 91 of the outer support 101 in the foreign matter introduced into the radial space between the upper projecting lip 91 and the flange 15. [ The foreign matter passing through the radial space between the other end of the upper bent portion 110 and one surface of the sealing member 80 is collected. To this end, the pocket lip 92 may form a third collection space S3 with its upper portion opened. Therefore, the pocket lip 92 can cause the external foreign matter stacked in the third trapping space S3 to be radially outwardly discharged, or to flow out of the outer circumferential surface thereof to be discharged to the outside of the sealing member 80 .

The first and second corrugations 93 and 94 extend from one surface of the inner support body 73 and come into contact with the other surface of the outer support body 101 to completely block external foreign matter. However, as described above, since the foreign matter must pass through the space of the labyrinth structure between the outer support 101 and the protruding lips 91 and the pocket lips 92, , And it may consist of only one assembly.

The first chamber 93 is formed to be inclined outwardly in the radial direction and on one side in the axial direction and forms a fourth collecting space S4 together with the sealing member 80 attached to the inclined portion 73. The foreign matter introduced into the first chamber 93 is stacked in the fourth trapping space S4 along the inclined portion 73 and discharged to the outside of the sealing member 80. [

The second enclosure 94 extends axially one side of the inside of the first enclosure 93 and includes a first enclosure 93 and a fifth enclosure space S5 enclosed from the outside together with the outside support 101, So that the inflow of external foreign matter can be completely blocked.

The grease lip 95 is formed so as to extend radially inwardly and radially outwardly from the radially inner end of the inner support body 70 while being inclined. Therefore, when lubricating oil in the space between the outer ring 12 and the hub 10 is going to pass through the grease lip 95 and out of the sealing apparatus 100, the grease lip 95, So that leakage of the lubricating oil can be prevented. Even if a part of the lubricating oil is passed through the grease lips 95, the second grease lips 95 does not flow out to the outside and returns to the inside of the grease lips 95 again. At this time, the grease lip 95 and the second chamber 94 form the sixth collecting space S6, thereby blocking external foreign matter and preventing leakage of the lubricating oil.

The outer support 101 may be made of stainless steel material and includes a radial extension 120, an upper bend 110, a connection 130, and a lower bend 140 .

The radial extension 120 extends generally radially, and a portion of the radial extension 120 is provided so as to contact the other surface of the flange 15.

The radial extension 120 includes a radially outer end 121 and a radially inner end 123. The radially outer end 121 of the radial extension 120 is in contact with the contact surface 115a of the flange 15 so that the radially inner end 123 is spaced from the flange 15 such that the spacing P1 is formed Are spaced apart. In other words, the radial extension 120 is inclined radially inward from the radially outer end 121 to the radially inner end 123 and toward the other side in the axial direction. Due to the spacing P1, the radial extension 120 can have a constant elastic force in the axial direction. Therefore, when an impact or a load is applied from the outside, the separation of the outer support 101 is blocked.

When the outer support 101 is mounted on the hub 10, the radially outer end 121 of the upper radial extension 120 receives a considerable external force due to the contact surface 115a of the flange 15, Due to the repulsive force, the outer support 101 strongly contacts the contact surface 115a of the flange 15. It is therefore possible to completely prevent foreign matter from entering between the flange 15 and the outer support 101 from the outside of the radius of the upper contact surface 115a while the outer support 101 is firmly mounted to the hub 10 The deviation can be prevented.

One surface of the radially inner end 123 of the upper outer support member 101 faces the other surface of the flange 15 and one surface of the radially inner end 123 is provided with a spacing 123a Is formed. The distance P2 between the other surface of the spacer 123a and the flange 15 is set to 0.01 mm or more and 2.0 mm or less. If the distance between the upper and lower supports 101 is less than 0.01 mm, it is impossible to apply a strong coupling force due to the repulsive force of the outer support 101 when the upper and outer supports 101 are mounted on the hub 10. If the separation distance exceeds 2.0 mm, durability due to an external impact is reduced. Therefore, it is appropriate that the above-mentioned spacing distance is 0.01 mm or more and 2.0 mm or less.

Meanwhile, an anti-corrosion material may be applied between the circumferential extension 120 and the flange 15.

The upper bent portion 110 is curvedly extended from the radially inner side end 121 of the radial extending portion 120 to the other side in the axial direction so as to be adjacent to the sealing member 80. At this time, the other surface of the flange 15 extends straightly in the radial direction up to the portion where the radial extension portion 120 is mounted, but the other surface of the flange 15 outside the radial portion of the upper portion is axially one side and radially outward . The protruding lip 91 of the upper sealing member 80 is disposed on the other side in the axial direction than one end of the upper bent portion 110. The external foreign matter introduced between the protruding lip 91 and the other surface of the flange 15 is stacked in the second collecting space S2 formed between the other surface of the flange 15 and one end of the upper bent portion 110, (15) falls to the ground as it rotates.

The connecting portion 130 is formed so as to be inclined radially inward and radially outward from the radially inner end 123 of the radial extending portion 120. As described above, since the radial extending portion 120 is formed to be inclined in the axial direction about the radially outer end 121 thereof, one end of the connecting portion 130 is spaced apart from the flange 15, And is in contact with the outer peripheral surface of the mounting portion 16.

The lower bent portion 140 is bent from the other end of the connecting portion 130 to the other side in the axial direction and press-fitted into the slinger mounting surface 16a. The upper slinger mounting surface 16a is formed on the outer circumferential surface of the slinger mounting portion 16 and refers to a surface where the slinger mounting portion 16 and the lower bending portion 140 are in contact with each other.

The lower bending portion 140 and the slinger mounting surface 16a are sloped from the other end of the upper connection portion 130 to the other side in the axial direction and outward in the radial direction.

The configuration of the lower bending portion 140 will be described with reference to FIG. 3 is a sectional view showing a state before the outer support 101 of the wheel bearing assembly according to the embodiment of the present invention is assembled to the hub 10. Fig.

3, the distance X1 between one end of the lower bent portion 140 and the bearing rotation axis T is set to be equal to or larger than the distance between the other end and the bearing rotation axis T by 0.05 mm or more and 0.3 mm or less Is set to be smaller. Thus, the lower bending portion 140 extends at the other side in the axial direction and has an inclination outside the radial direction.

On the other hand, the radius of one end of the slinger mounting surface 16a on which the lower bent portion 140 is mounted is set to be smaller than the radius of the other end of the slinger mounting surface 16b. For example, the difference in radial height L1 between the other end of the slinger mounting surface 16a and one end thereof may be set to 0.05 mm or more and 0.35 mm or less. Therefore, the slinger mounting surface 16a also has an inclination toward the other side in the axial direction and radially outward.

The radius of the slinger mounting surface 16a is formed at least radially outwardly of the radial position of the lower bending portion 140 before the lower bending portion 140 is press-fitted into the slinger mounting surface 16a. For example, the radius of the slinger mounting surface 16a of the hub 10 may be larger than the radial position of the lower bent portion 140 by 0.1 mm. 3 is further mounted on the slinger mounting portion 16 so that the lower bending portion 140 is further compressed radially outward so that the outer supporting body 101 is pressed against the hub 10 by the repulsive force of the outer supporting body 101. [ As shown in FIG.

If the lower bending portion 140 is not formed to be inclined radially outwardly, the radially outer end 121 of the radial extending portion 120 is strongly pressed by the force of the outer support 101 pushing the hub 10 The outer support 101 can not be brought into contact with the contact surface 115a of the flange 15 and can be released to the other side in the axial direction. One end of the lower bending portion 140 is strongly supported by the flange 15 by the radial extension portion 120 while the other end of the lower bending portion 140 is formed to be inclined radially outwardly and press-fitted into the slinger mounting portion 16 , The axial movement of the lower bending portion 140 is completely restricted and firmly mounted to the hub 10.

The slinger structure 100 according to the embodiment of the present invention further includes a shock absorbing portion 125 formed to absorb an external impact or vibration on a part of the outer support 101. [ 2, the shock absorber 125 may be formed at a connecting portion between the radially inner end 123 of the radial extension portion 120 and the connection portion 130, and the radial extension portion 120 to the flange 15 side. When the impact absorbing portion 125 is formed between the cervical extension portion 120 and the connection portion 130, the elastic member can be absorbed more flexibly than when the external impact is applied. This configuration is possible because the spacing space P1 described above is formed at one side of the radial extension 120. [

On the other hand, the shape of the upper shock absorber 125 is not limited to the embodiment of the present invention. 3 is a slinger structure applied to an automotive wheel bearing assembly according to another embodiment of the present invention.

Referring to FIG. 3, the slinger structure 100 according to another embodiment of the present invention is formed such that the impact absorbing portion 125 is convex on one side in the axial direction. Even if an external shock or vibration is applied to the slinger structure 100 by the shock absorbing portion 125, the external support 101 elastically responds accordingly. As a result, the outer support 101 is prevented from being detached, the slinger structure 100 can be stably mounted on the hub, and the constant sealing performance of the lip portion 90 can be continuously ensured.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

Claims (17)

A wheel bearing assembly comprising a flange, a hub having a slinger mounting portion extending axially from the flange, and an outer ring rotatable relative to the hub, the wheel bearing assembly being mounted to the hub to reduce bearing torque of the wheel bearing assembly In the slinger structure,
A radially extending portion radially inwardly spaced from the flange, the radially outer end of the radially extending portion abutting the flange and extending radially outwardly and obliquely to one side of the axial direction;
A connecting portion extending from an inner radial side of the radial extending portion to an outer peripheral side of the slinger mounting portion; And
A lower bent portion, one end of which extends in the axial direction from the connecting portion and is press-fitted into the outer peripheral surface of the slinger mounting portion;
And an outer support including an outer support,
Wherein the lower bent portion includes one end close to the flange and the other end opposite to the one end,
And one end of the lower bent portion is formed radially inward of the other end of the lower bent portion. delete The method according to claim 1,
A spacing space is formed between the radial extension and the flange,
And the radially innermost end of the radial extending portion is spaced apart from the flange by 0.01 mm or more and 2.0 mm or less. The method according to claim 1,
Wherein a difference between a distance between one end of the lower bent portion and a distance between the other end of the lower bent portion and the rotation axis of the hub is 0.05 mm or more and 0.3 mm or less. The method according to claim 1,
An upper bent portion curvedly extended from the radially outer end of the radial extending portion toward the outer ring;
Further comprising a slinger structure. 6. The method of claim 5,
A shock absorbing portion formed at any one of a radial extension portion or a connecting portion of the outer support and formed to be convex from the outer support to the flange so as to absorb impact or vibration applied to the outer support;
Further comprising a slinger structure.
The method according to claim 6,
Wherein the shock absorbing portion is formed between the radial extension portion and the connection portion.
6. The method of claim 5,
And a connection portion formed between the radial extension portion and the connection portion,
A shock absorbing portion formed to protrude from the outer support in a direction opposite to the flange side;
Further comprising a slinger structure.
A wheel bearing assembly comprising: a hub having a flange; an outer ring having one end near the flange and the other end opposite to the flange, the outer ring being relatively rotatable with the hub,
And a slinger structure according to any one of claims 1 and 3 to 8,
An inner support mounted on one end of the outer ring; And
A sealing member enclosing a part of the inner support and including at least one lip protruded from the inner support;
Lt; / RTI >
The inner support
An axial supporting portion press-fitted into the outer peripheral surface of one end of the outer ring and extending in the axial direction;
A first radial support portion bent from one end of the axial support portion and extending radially inward and contacting one end of the outer ring;
An inclined portion extending from an inner radial side of the first radial supporting portion to an inner side in the radial direction and an other side in the axial direction; And
A second radial support extending further radially inwardly from a radially inner end of the ramp;
≪ / RTI >
10. The method of claim 9,
The sealing member
A sealing dam projecting radially outward from the other end of the axial support; And
An extension surrounding the radially inner end of the inner support;
≪ / RTI >
Wherein one surface of the sealing dam extends vertically outwardly in a radial direction, the other surface of the sealing dam is inclined radially inwardly and outwardly in the axial direction,
And a first collecting space is formed between the other surface of the sealing dam and the outer ring for collecting external foreign matter falling on the other surface of the sealing dam.
A wheel bearing assembly comprising: a hub having a flange; an outer ring having one end near the flange and the other end opposite to the flange, the outer ring being relatively rotatable with the hub,
A slinger structure according to any one of claims 5 to 8, wherein the slinger structure comprises:
An inner support mounted on one end of the outer ring; And
A sealing member enclosing a part of the inner support and including at least one lip protruded from the inner support;
Lt; / RTI >
The inner support
An axial supporting portion press-fitted into the outer peripheral surface of one end of the outer ring and extending in the axial direction;
A first radial support portion bent from one end of the axial support portion and extending radially inward and contacting one end of the outer ring;
An inclined portion extending from an inner radial side of the first radial supporting portion to an inner side in the radial direction and an other side in the axial direction; And
And a second radial support extending further radially inward from a radially inner end of the ramp,
The sealing member
A sealing dam projecting radially outward from the other end of the axial support; And
And an extension surrounding the radially inner end of the inner support,
Wherein one surface of the sealing dam extends vertically outwardly in a radial direction, the other surface of the sealing dam is inclined radially inwardly and outwardly in the axial direction,
A first collecting space is formed between the other surface of the sealing dam and the outer ring to collect external foreign matter falling on the other surface of the sealing dam,
The lip portion
A protruding lip adapted to surround the axial support and extending from the radially inward end of the sealing dam to one side in the axial direction and extending further to the flange side than one end of the axial support; And
And an end portion of the first radial supporting portion is extended toward the upper curved portion of the outer supporting body and is formed in a pocket shape having an opened upper portion, A pocket lip having a third collection space formed thereon;
≪ / RTI >
12. The method of claim 11,
The lip portion
A first arm extending from said second radial support and contacting said outer support and extending radially outwardly and axially to one side to form a fourth collection space;
A second chamber located radially inward of the first chamber and extending from the second radial support to contact the outer support and forming a fifth collection space with the first chamber; And
A grease extending inwardly and radially inwardly at an inner radial side of the inner support body and having an inclination extending toward the other axial side;
The wheel bearing assembly further comprising:
12. The method of claim 11,
Wherein the flange extends straightly outwardly radially from the hub to a portion where the outer support contacts, and the radially outer portion of the flange extends obliquely outwardly on one side in the axial direction and radially outward than a portion in contact with the outer support.
14. The method of claim 13,
And a second collecting space is formed between the flange and the upper bent portion to collect external foreign matter and to drop to the ground when the flange rotates.
15. The method of claim 14,
Wherein the lower bending portion is mounted on the slinger mounting portion formed on the hub, and the slinger mounting portion is formed to be inclined to the other side in the axial direction and radially outward.
16. The method of claim 15,
The slinger mounting portion
And a slinger mounting surface formed on an outer circumferential surface thereof and on which the lower bent portion is mounted,
Wherein one end and the other end of the slinger mounting surface are formed at positions corresponding to one end and the other end of the lower bent portion,
Wherein one end of the slinger mounting surface is formed inside a radius of 0.05 mm or more and 0.35 mm or less than the other end of the slinger mounting surface.
17. The method of claim 16,
Wherein the lower bend before press-in to the hub has a radius that is at least 0.1 mm smaller than the radius of the slinger mounting surface to be radially inwardly compressed by the slinger mount.
KR1020160062868A 2016-05-23 2016-05-23 Slinger structure and wheel bearing assembly provided the same KR101826200B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200080070A (en) 2018-12-26 2020-07-06 주식회사 일진글로벌 Wheel bearing for vehicle having reduced drag torque

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3074861B1 (en) * 2017-12-08 2020-01-31 Ntn-Snr Roulements ROLLING BEARING EQUIPPED WITH A SEALING DEVICE
KR102522632B1 (en) * 2019-01-16 2023-04-24 주식회사 일진글로벌 Wheel bearing for vehicle
KR102536970B1 (en) * 2019-02-15 2023-05-26 주식회사 일진글로벌 Wheel bearing for vehicle having improved sealing function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200080070A (en) 2018-12-26 2020-07-06 주식회사 일진글로벌 Wheel bearing for vehicle having reduced drag torque

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