KR20190070562A - Wheel bearing and the method for modification of the sealing member thereof - Google Patents

Abstract

The present invention relates to a wheel bearing and a method for modification of a sealing member thereof and, more specifically, to a wheel bearing and a method for modification of a sealing member thereof, which can improve fuel efficiency by modifying the shape of a seal lip when a vehicle is driven at a high speed.

Description

WHEEL BEARING AND METHOD FOR MODIFICATION OF THE SEALING MEMBER THEREOF FIELD OF THE INVENTION [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel bearing and a method of deforming the sealing member, and more particularly, to a wheel bearing and a method of deforming the sealing member, which can improve the fuel consumption by deforming the shape of the seal lip during high-

In general, a bearing is a device mounted between a rotating element and a non-rotating element to facilitate rotation of the rotating element. At present, various bearings such as roller bearings, tapered bearings, and needle bearings are used.

Wheel bearings are one type of such bearings, which rotatably connect a wheel, which is a rotating element, to a vehicle body, which is a non-rotating element. The wheel bearing includes an inner ring connected to one of 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 such foreign matter penetrates into the interior of the wheel bearing, particularly the portion where the rolling element is mounted, the raceway, which is a polishing surface, may be damaged.

This damaged raceway generates noise and vibration during operation of the wheel bearing, and can shorten the life of the wheel bearing.

Therefore, at one or both ends of the wheel bearing, a sealing device for preventing foreign substances from entering from the outside is mounted.

1 is a sectional view of a conventional wheel bearing, and Fig. 2 is a detail view of a conventional wheel bearing section.

The conventional sealing apparatus includes a first disk 2 mounted on an outer ring, a second disk 10 facing the first disk 2 and mounted on the inner ring, a second disk 10 mounted on the inner ring, And a plurality of seal lips (20, 22, 24) that surround the second disc (10) except for the first disc (2) and contact the first disc (2).

The sealing device includes a protrusion (26) protruding further in the direction of an inner ring than a mounting surface on which the second disc (10) is mounted to the inner ring. The first disc (2) A first supporting portion 6 bent in the first mounting portion 4 toward the inner ring and a second supporting portion 6 bent in the first supporting portion 6 and extending in the same direction as the first mounting portion 4, Wherein the second disk 10 includes a second mounting portion 12 that is press-fitted into the inner ring, a second support portion 14 that extends toward the inner ring, A connecting portion 18 connecting the second mounting portion 12 and the second supporting portion 14 and having the protruding portion 26 positioned thereon, The first mounting portion 4 is bent at the second supporting portion 14 and extends in the same direction as the second mounting portion 12, And a second bent portion 16 positioned between the first bent portion 8 and the second bent portion 8.

The sealing device includes a first lip 20 extending obliquely from the connecting portion 18 toward the first bent portion 8 and contacting the first bent portion 8 and a second rib 16 extending from the second bent portion 16 A second lip 22 extending obliquely from the second support portion 6 toward the first support portion 6 and contacting the first support portion 6 and a second lip 22 extending from the second bend portion 16 to the first attachment portion 4 Further comprising a third lip (24) extending obliquely toward the first mounting portion (4) and contacting the first mounting portion (4), wherein the first lip (20) and the third lip (24) And the second lip 22 is formed by being inclined in the same direction as the first lip 20. [

When the sealing device is configured as described above, foreign matter can be effectively prevented from entering the vehicle at low speed, but there is a problem that a plurality of seal lips act as resistances during high-speed travel, adversely affecting vehicle fuel economy.

Korean Patent Publication No. 10-2015-0065487

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to improve the fuel consumption by deforming the shape of the seal lip during high-speed traveling of the vehicle.

In order to achieve the above object, according to the present invention,

A first disk mounted on the outer ring;

A second disk facing the first disk and mounted on the inner ring;

And a sealing member surrounding the second disc and having a plurality of seal rings contacting the first disc, except for a circumferential portion of a portion where the second disc is press-fitted into the inner ring,

And a core portion is formed on an inner side surface of a portion where the second disk is mounted on the inner ring so that one of the plurality of seal lips is contacted and separated from the first disk by the core portion when the vehicle travels at a high speed.

The first disk,

A first mounting portion press-fitted into the outer ring;

And a first support portion extending from the first mounting portion toward the inner ring.

The second disk,

A second mounting portion press-fitted into the outer ring;

A second support portion extending toward the outer ring;

A connecting portion formed to gently step away from the second mounting portion to disperse the load when the sealing member is press-fitted and connect the second mounting portion to the second supporting portion;

A bent portion bent at the second support portion and extending a predetermined length in the same direction as the second mounting portion;

A vertical portion that is bent at the bent portion and extends a certain length toward the outer ring;

And a horizontal part that is bent at the vertical part and extends a predetermined length in different directions from the bent part.

The sealing member,

A first seal lip extending obliquely from the horizontal portion toward the opposite side of the first support portion and contacting the inside of the first mounting portion;

A second seal lip extending obliquely from the vertical portion toward the outer ring and contacting the inside of the first support portion;

And a third seal lip which is located on the lower side of the second seal lip and extends obliquely toward the outer ring from the vertical portion to contact the inside of the first support portion.

In the core portion,

A core fixing portion mounted in the inner diameter portion of the second mounting portion in a ring shape;

A core pillar extending from the outer surface of the core fixing portion toward the first mounting portion by a predetermined length and spaced at a predetermined angle in the circumferential direction of the core fixing portion;

A core flow portion inserted between any one of the core posts and the other of the core posts;

And a core hook provided between the core fixing portion and the core moving portion.

The core flow portion is formed to have the same height as the height of the core pillar portion,

The inner and outer diameters of the core flow portion have the same curvature as that of the core fixing portion,

One side of the core flow portion is in contact with one of the core posts and the other side of the core flow portion is in contact with the other of the core posts.

When the core flow portions are plural,

And the plurality of core flow portions form a ring shape.

And the inner circumferential surface of the core flow portion is formed with a trapezoidal flow groove having a smaller cross sectional area as it approaches the outer diameter surface.

And a flow protrusion protruding by a predetermined length toward the core fixing portion is formed on the bottom surface of the flow groove.

The core hook

A lower end hook that is press-fitted into the core fixing portion and has fixing grooves formed on both inner side surfaces of the upper end to be deeper toward the upper side;

The upper hook is positioned in a 'C' shape so that the opening portion faces the lower end hook, and both ends of the opening portion are formed with claws having a shape corresponding to the fixing groove, and are engaged with the lower end hooks by engagement of the claw portions and the fixing grooves.

And a core spring into which the upper end of the upper hook is inserted at one end and a flow protrusion is inserted at the other end inside.

When a plurality of core flow portions are provided, the plurality of flow grooves are formed at a predetermined distance from each other.

And rubber on both sides of the core flow portion is injected to prevent joint due to friction with the core pillar portion.

According to another aspect of the present invention, there is provided a method of deforming a sealing member of a wheel bearing,

Shifting the vehicle from low-speed traveling to high-speed traveling;

Applying a tensile force to the core spring;

Moving the position of the core flow portion by the tensile force of the core spring;

Pushing up the third seal lip toward the second seal lip while moving the core flow portion;

Separating the third seal lip from the first support of the first disc;

.

According to the present invention, a sealing performance can be ensured by using a plurality of seal lips when the vehicle is running at a low speed, and the shape of the seal lips can be modified at high speed to improve fuel economy.

1 is a sectional view of a conventional wheel bearing.
2 is a detailed view of a conventional wheel bearing section.
3 is a detailed sectional view of a wheel bearing at low speed according to the present invention.
4 is a detailed sectional view of a high-speed wheel bearing according to the present invention.
Figure 5 is a core section of a wheel bearing according to the present invention.
6 is a structural view of a core hook according to the present invention before assembly;
7 is a structural view after assembly of the core hook according to the present invention.
8 is a view of a core portion of a low-speed wheel bearing according to the present invention.
9 is a view showing a core part of a high-speed wheel bearing according to the present invention.
10 is a perspective view of a core fluid-moving outer rubber according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that the same components are denoted by the same reference numerals in the drawings. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel bearing and a method of deforming the sealing member, and more particularly, to a wheel bearing and a method of deforming the sealing member, which can improve the fuel consumption by deforming the shape of the seal lip during high-

FIG. 3 is a detailed sectional view of a low-speed wheel bearing according to the present invention, and FIG. 4 is a detailed view of a high-speed wheel bearing section according to the present invention.

The wheel bearing of the present invention is mounted between an outer ring and an inner ring corresponding to the outer ring, and includes a rolling member that smoothes relative rotation of the inner ring with respect to the outer ring.

The wheel bearing of the present invention includes a first disk 30 mounted on the outer ring 30, a second disk 36 facing the first disk 30 and mounted on the inner ring, A sealing member 50 in which a plurality of seal lips 52, 54 and 56 are formed to be in contact with each other and a core portion 58 formed in an inner surface of a portion where the second disk 36 is mounted on the inner ring, .

The first disk 30 includes a first mounting portion 32 that is press-fitted into an inner circumferential surface of the outer ring and a first support portion 34 that extends from the first mounting portion 32 toward the inner ring.

The second disk 36 has a second mounting portion 38 that is press-fitted into the outer circumferential surface of the inner ring, a second supporting portion 40 that extends toward the outer ring, and a second mounting portion 38 that is formed to gradually fall from the second mounting portion 38, A connecting portion 42 for dispersing a load when the sealing member 50 is press-fitted and connecting the second mounting portion 38 and the second supporting portion 40, a second connecting portion 42 bent at the second supporting portion 40, A vertical portion 46 that is bent at the bent portion 44 and extends a predetermined length toward the outer ring, a bent portion 46 that is bent at the vertical portion 46, And a horizontal portion 48 extending a predetermined length in different directions from the portion 44.

The sealing member 50 is provided to surround the second disc 36 except for the circumferential portion of the portion where the second disc 36 is pressed into the inner ring. A first seal lip 52 extending obliquely toward the opposite side of the supporter 34 and contacting the inside of the first supporter 32 and a second seal lip 52 extending obliquely from the supporter 46 toward the outer ring, A second seal lip 54 contacting the inside of the first seal lip 54 is disposed below the second seal lip 54 and extends obliquely toward the outer ring from the vertical portion 46, And a third seal lip 56 to be contacted.

Also, the sealing member 50 of the present invention may have the same structure as the conventional protrusion.

Fig. 5 shows a core portion of a wheel bearing according to the present invention.

The core portion 58 includes a core fixing portion 60, a core pillar portion 62, a core fluid portion 64, and a core hook 72.

The core fixing portion 60 is formed in a ring shape and is mounted on the inner diameter portion of the second mounting portion 38, that is, the second mounting portion 38 is inserted into the core fixing portion 60.

The core pillar portion 62 extends from the outer surface of the core fixing portion 60 toward the first mounting portion 32 by a predetermined length. The core pillar portion 62 is spaced from the core fixing portion 60 by a predetermined angle So that a plurality of these are formed. In the present invention, the core pillar portions 62 are formed of four pieces and are spaced apart from each other by 90 degrees. However, the number of the core pillar portions 62 may be changed.

The core fluid portion 64 is inserted between any one of the core pillar portions 62 and the other of the core pillar portions 62 and is provided in plural according to the number of the core pillar portions 62 ,

When the core fluid section (64) has a plurality of core fluid sections (64), the inner and outer diameters of the core fluid section (64) And the height of the core fluid portion 64, which is the interval between the inner and outer diameters of the core fluid portion 64, is equal to the height of the core pillar portion 62 do.

One side of the core fluid portion 64 is in contact with one of the core pillars 62 and the other side thereof is in contact with the other core pillars 62.

On the inner surface of the core fluid passage (64), a flow groove (66) having a predetermined depth to the outer diameter surface is formed.

The number of the flow grooves 66 formed in any one of the core fluid flow portions 64 when the core fluid flow portions 64 are plural is larger than the number of the flow grooves 66 formed in the other core flow portion 64 66, and when the plurality of core fluid dynamic portions 64 form a ring shape, the plurality of flow grooves 66 are spaced apart from each other by a predetermined distance.

The flow groove 66 has a trapezoidal shape in which the sectional area becomes smaller as it gets closer to the outer diameter surface of the core fluid flow portion 64. The bottom surface of the flow groove 66 has a constant A flow protrusion 68 protruding in the longitudinal direction is formed.

FIG. 6 is a structural view of the core hook according to the present invention before assembly, and FIG. 7 is a structural view of the core hook after assembly according to the present invention.

The core hooks 72 are provided in the same number as the number of the flow grooves 66 and are provided between the core fixing portion 60 and the core fluid portion 64. The lower end hooks 74, An upper hook 78, and a core spring 82.

The lower hook 74 is press-fitted into the core fixing portion 60 so that both open ends of the lower hook 74 face the inner and outer diameters of the core fixing portion 60, A fixing groove 76 which becomes deeper toward the upper side is formed.

The upper hook 78 is formed in a 'C' shape so that a 'C' shaped opening is directed to the upper end of the lower hook 74, Shaped claw portion 80 is formed.

The upper hooks 78 and the lower hooks 74 are coupled to each other by inserting and coupling the claw portions 80 into the fixing grooves 76.

The upper end of the upper hook 78 is inserted into one end of the core spring 82 and the flow protrusion 68 is inserted into the other end.

The core fixing portion (60) and the core moving portion (64) are coupled to each other by the construction of the core spring (82).

Fig. 8 shows a core portion of a low-speed wheel bearing according to the present invention, and Fig. 9 shows a core portion of a high-speed wheel bearing according to the present invention.

According to the present invention, there is provided a method of deforming a sealing member of a wheel bearing,

Shifting the vehicle from low-speed traveling to high-speed traveling;

Applying a tensile force to the core spring (82);

Moving the position of the core moving part (64) by the tensile force of the core spring (82);

Pushing up the third seal lip (56) toward the second seal lip (54) while moving the core fluid (64);

Separating the third seal lip 56 from the first support portion 34 of the first disk 30;

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First, when the vehicle travels at a low speed, the inner spring of the core moving part (64) and the outer diameter surface of the core fixing part (60) are in contact with each other while the core spring (82) The first seal lip 52 is in contact with the first mounting portion 32 and the second seal lip 54 and the third seal lip 56 are in contact with the inside of the first support portion 34.

Thereafter, when the vehicle travels at a low speed to a high speed, the rotation speed of the wheel bearing is increased, and the core spring 82 is pulled by the centrifugal force due to the rotation.

As the core spring 82 is tensioned, the position of the core fluid portion 64 moves in the radial direction of the core fixing portion 60, The outer circumferential surface of the core fluid portion 64 is spaced apart from the outer circumferential surface of the core 60 by a distance between the inner circumferential surface of the core fluid portion 64 and the outer circumferential surface of the core securing portion 60, And is in a state of protruding from the end of the column portion 62.

10 shows a core fluid outer rubber according to the present invention

When the position of the core fluid portion 64 moves in the radial direction of the core fixing portion 60, both side surfaces of the core fluid portion 64 can rub against the core pillar portion 62, Therefore, both sides of the core fluid portion 64 may be formed by double injection of a rubber 70 to prevent a joint due to friction with the core pillar portion 62.

The outer peripheral surface of the core fluid portion 64 protrudes from the end of the core column portion 62 so that the core fluid portion 64 pushes the third seal lip 56 toward the second seal lip 54 The third seal lip 56 is rotated clockwise to separate the contact with the first support portion 34.

That is, in the wheel bearing according to the present invention, when the vehicle is running at a low speed, all of the plurality of seal lips 52, 54, 56 contact the first disk 30 to maintain the sealing performance, The shape of the sealing member 50 is deformed so that the number of the seal lips 52, 54, 56 contacting the first disk 30 is smaller than that during the low-speed traveling of the vehicle, It is possible to improve the fuel economy of the vehicle by reducing the resistance between the fuel injection valves 52, 54, and 56.

The embodiments of the wheel bearing and the sealing member deforming method of the present invention described above are merely illustrative and those skilled in the art can make various modifications and equivalent other embodiments You can see that it is. It is therefore to be understood that the invention is not limited to the form set forth in the foregoing description. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

2: Conventional first disk
4: Conventional first mounting portion
6: Conventional first support
8: Conventional first bend section
10: Conventional second disk
12: Conventional second mounting portion
14: Conventional second support
16: Conventional second bend section
18: Conventional connection
20: Conventional first rib
22: Conventional second lip
24: Conventional third rib
26: Conventional protrusion
30: first disk
32: first mounting portion
34: first support portion
36: second disk
38: second mounting portion
40: second support portion
42:
44:
46:
48:
50: Sealing member
52: 1st seal lip
54: 2nd seal lip
56: Third Seal
58: core portion
60: core fixing section
62:
64: Core flow
66: flow groove
68:
70: Rubber
72: core hook
74: Lower hook
76: Fixing groove
78: Top hook
80: Claw portion
82: Core spring

Claims (13)

An outer ring, an inner ring corresponding to the outer ring, and a rolling member mounted between the outer ring and the inner ring to facilitate relative rotation of the inner ring,
A first disk mounted on the outer ring;
A second disk facing the first disk and mounted on the inner ring;
And a sealing member that surrounds the second disk and has a plurality of seal lips that are in contact with the first disk, except for a circumferential portion of a portion where the second disk is press-fitted into the inner ring,
Wherein a core portion is formed on an inner side surface of a portion where the second disk is mounted on the inner ring so that any one of the plurality of seal lips is contacted and separated from the first disk by the core portion
. The method according to claim 1,
Wherein the first disk comprises:
A first mounting portion press-fitted into the outer ring;
And a first support portion extending from the first mounting portion toward the inner ring
. 3. The method of claim 2,
Wherein the second disk comprises:
A second mounting portion press-fitted into the inner ring;
A second support portion extending toward the outer ring;
A connecting portion formed to gently step away from the second mounting portion to disperse a load when the sealing member is press-fitted and to connect the second mounting portion and the second supporting portion;
A bent portion bent at the second support portion and extending a certain length in the same direction as the second mounting portion;
A vertical portion bent at the bent portion and extending a predetermined length toward the outer ring;
And a horizontal part that is bent at the vertical part and extends a predetermined length in different directions from the bent part
. The method of claim 3,
The sealing member
A first seal lip extending obliquely from the horizontal portion toward the opposite side of the first support portion and contacting the inside of the first mounting portion;
A second seal lip extending obliquely from the vertical portion toward the outer ring and contacting the inside of the first support portion;
And a third seal lip which is positioned below the second seal lip and extends obliquely toward the outer ring from the vertical portion to be in contact with the inside of the first support portion
. 5. The method of claim 4,
The core portion
A core fixing portion mounted in an inner diameter portion of the second mounting portion in a ring shape;
A core pillar extending from the outer surface of the core fixing part to a predetermined length from the outer surface of the core fixing part toward the first mounting part and spaced at a predetermined angle in the circumferential direction of the core fixing part;
A core flow portion inserted between any one of the core posts and the other of the core posts;
And a core hook provided between the core fixing portion and the core fluid portion
. 6. The method of claim 5,
The core flow portion is formed to have the same height as the height of the core pillar portion,
Wherein the inner and outer diameters of the core flow portion have the same curvature as that of the core fixing portion,
Wherein one side of the core flow portion is in contact with any one of the core posts and the other side is in contact with the other of the core posts
. The method according to claim 6,
When the core flow portion is plural,
And the plurality of core flow portions form a ring shape. 8. The method of claim 7,
Wherein the inner circumferential surface of the core flow portion is formed with a trapezoidal flow groove having a smaller cross sectional area as the outer circumferential surface becomes closer to the outer circumferential surface. 9. The method of claim 8,
And a flow protrusion protruding by a predetermined length toward the core fixing portion is formed on a bottom surface of the flow groove. 10. The method of claim 9,
The core hook
A lower end hook that is press-fitted into the core fixing portion and has fixing grooves formed on both inner side surfaces at an upper end thereof to become deeper toward the upper side;
Shaped opening corresponding to the fixing groove is formed at both ends of the opening portion so as to be engaged with the lower end hook by engagement between the pawl portion and the fixing groove Upper hook;
And a core spring into which the upper end of the upper hook is inserted at one end and the flow protrusion is inserted at the other end inside
. 9. The method of claim 8,
Wherein a plurality of the flow grooves are spaced apart from each other by a predetermined distance when the core flow portion is provided in plurality. The method according to claim 6,
Wherein rubber is double-injected on both sides of the core flow portion to prevent a joint due to friction with the core column portion. 13. A method of deforming a sealing member of a wheel bearing according to any one of claims 1 to 12,
Shifting the vehicle from low-speed traveling to high-speed traveling;
Applying a tensile force to the core spring;
Moving the position of the core flow portion by the tensile force of the core spring;
Pushing up the third seal lip toward the second seal lip while moving the core flow portion;
Separating the third seal lip from the first support of the first disk;
Wherein the bearing member comprises a bearing member.

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