KR20160087701A - Wheel hub and wheel bearing assembly provided with the smae - Google Patents

Wheel hub and wheel bearing assembly provided with the smae Download PDF

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Publication number
KR20160087701A
KR20160087701A KR1020150007006A KR20150007006A KR20160087701A KR 20160087701 A KR20160087701 A KR 20160087701A KR 1020150007006 A KR1020150007006 A KR 1020150007006A KR 20150007006 A KR20150007006 A KR 20150007006A KR 20160087701 A KR20160087701 A KR 20160087701A
Authority
KR
South Korea
Prior art keywords
wheel hub
hub
wheel
radially
intermediate portion
Prior art date
Application number
KR1020150007006A
Other languages
Korean (ko)
Inventor
조선기
Original Assignee
주식회사 일진베어링
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 일진베어링 filed Critical 주식회사 일진베어링
Priority to KR1020150007006A priority Critical patent/KR20160087701A/en
Publication of KR20160087701A publication Critical patent/KR20160087701A/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
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/18—Arrangement of bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2340/00—Wheel transporting, Mounting of wheels
    • B60B2340/30—Wheel transporting or handling devices
    • B60B2340/34—Wheel transporting or handling devices for positioning the wheel to hub or boltholes
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

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

Abstract

The present invention relates to a wheel hub which is disposed on a radially inner circumferential surface of an outer ring and in which a plurality of rolling elements are disposed between the inner hub and the outer ring, the wheel hub comprising: a flange formed in a disk shape extending radially outwardly from one end thereof; And an intermediate portion extending from the flange to the other side; Wherein the intermediate portion includes at least one recess that is recessed radially inwardly, and a wheel bearing assembly including the wheel hub. The present invention has the effect of reducing the cost while maintaining the durability and rigidity of the wheel bearings by forming a concave portion by removing a part of the intermediate portion which receives a small load among the wheel hubs.

Description

WHEEL HUB AND WHEEL BEARING ASSEMBLY PROVIDED WITH THE SMAE BACKGROUND OF THE INVENTION [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel hub and a wheel bearing including the wheel hub, and more particularly, to a wheel hub and a wheel bearing assembly including the wheel hub, which are capable of reducing weight by removing a portion of the wheel hub, .

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 ruler bearings, tapered bearings, and needle bearings are used. Wheel bearings are a type of such bearings, and function to connect the wheel, which is a rotating element, to the body, which is a non-rotating element, so as to be rotatable.

Such a wheel bearing includes a wheel hub which is connected to a wheel so as to rotate, an outer wheel which is fitted inside the wheel hub and is fastened to and fixed to a fixed body such as a body or knuckle, An inner ring, and a rolling member interposed between the outer ring and the inner ring.

The wheel hub includes a disc-shaped flange extending radially outwardly from one side thereof and an intermediate portion extending from the flange in a cylindrical shape on the other side. A bolt hole is formed in the flange, and the flange is fastened to the wheel by the bolt through the bolt hole. Accordingly, the load generated on the wheel when the vehicle is supported or moved is transmitted to the flange and the intermediate portion of the wheel hub through the bolt. In particular, the load acts largely in the direction from the bolt toward the center of the intermediate portion.

However, although the intermediate portion of the wheel hub according to the prior art can be divided into a portion that receives a large load and a portion that does not have a large load, the end portion of the wheel hub is formed into a simple circular shape without considering the load. When the intermediate portion of the wheel hub is formed into a circular shape, there is a problem that the volume and weight of the wheel hub are limited.

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 wheel hub which has a relatively large load, .

A wheel hub disposed at a radially inner circumferential surface of the outer ring and having a plurality of rolling elements disposed therebetween, the wheel hub having a disk-shaped flange extending radially outward from the one end thereof; And an intermediate portion extending from the flange to the other side, wherein the intermediate portion includes at least one recessed portion that is recessed radially inward.

The flange includes a bolt hole to which a hub bolt is mounted; And a tool assembly hole for inserting the tool is formed.

The radially innermost end of the recess may be located at least on a straight line passing through the center of the tool assembly hole and the center of the wheel hub.

The intermediate portion may include at least one protrusion radially outwardly protruding from the center of the bolt hole, the protrusion may be formed between adjacent recesses, and the radially outermost end of the protrusion may protrude from the center of the bolt hole And is located at least on a straight line passing through the center.

Wherein the wheel hub includes a hub raceway to which the rolling element is mounted on a radially outer circumferential surface of the wheel hub; And a stepped inner ring mounting portion radially inward from the other side of the intermediate portion, wherein the intermediate portion is located between the hub raceway and the inner ring mounting portion.

The wheel bearing assembly has a cylindrical shape, a flange is formed radially outward at one end, an inner ring mounting portion is formed at an outer peripheral surface of the other end, an intermediate portion is formed between the flange and the inner ring mounting portion, A wheel hub comprising at least one recessed portion, An outer ring spaced apart from the wheel hub by a predetermined distance outside the wheel hub and surrounding the wheel hub; A plurality of rolling elements disposed between the wheel hub and the outer ring; . ≪ / RTI >

The flange includes a bolt hole to which a hub bolt is mounted; And a tool assembly hole for inserting the tool is formed.

And the radially innermost end of the concave portion is located at least on a straight line passing through the center of the tool assembly hole and the center of the wheel hub.

The intermediate portion may include at least one protrusion radially outwardly protruding from the center of the bolt hole, the protrusion may be formed between adjacent recesses, and the radially outermost end of the protrusion may protrude from the center of the bolt hole And is located at least on a straight line passing through the center.

As described above, according to the embodiment of the present invention, by removing a portion of the middle portion of the wheel hub that receives a small load, the cost and cost can be reduced while maintaining the durability and rigidity of the wheel bearing.

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

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

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 drawing) to the wheel is referred to as "one side", "one side", "one side" and the like, ) Will be referred to as 'other side', 'other end', 'other end' and similar names.

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

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

FIG. 1 is a sectional view of a wheel bearing according to an embodiment of the present invention, FIG. 2 is a perspective view of a wheel hub according to an embodiment of the present invention, and FIG. 3 is a sectional view of a wheel hub 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 1 according to an embodiment of the present invention rotatably supports a wheel with respect to a vehicle body (for example, a knuckle), receives driving force from a constant velocity joint, and transmits the driving force to the wheel .

The wheel bearing 1 includes a wheel hub 10, an inner ring 11 coupled to the outside of the radius of the wheel hub 10, an outer ring 12 spaced apart from the inner ring 11 at a predetermined interval, A first rolling member 13 provided between the wheel hub 10 and the outer ring 12 and a second rolling member 113 provided between the inner ring 11 and the outer ring 12, A first sealing device 14 mounted between the wheel hub 10 and the outer ring 12 and a second sealing device 15 mounted between the inner wheel 11 and the outer ring 12 .

The wheel hub 10 includes a flange 20, a bent portion 30, and an inner ring mounting portion 40.

The flange 20 is formed in the shape of a disk extending radially outward from one side of the wheel hub 10. A bolt hole 21 is formed in the flange 20 and a hub bolt 23 is fixedly attached to the bolt hole 21. A wheel (not shown) of the vehicle is mounted on one side of the hub bolt 23. Further, a tool assembly hole 25 is further formed in the flange 20. A tool may be inserted into the tool assembly hole 25 to fix the outer ring 12 to a vehicle body (e.g., a knuckle). A pilot 27 protrudes in the axial direction on one surface of the flange 20. The pilot 27 serves to guide the wheel when mounting the wheel on the flange 20.

The bent portion 30 extends from the flange 20 to the other side, and its cross section is formed into a cylindrical shape. On the outer circumferential surface of the bent portion 30, a hub raceway 43 on which the first rolling member 13 is mounted is formed.

The inner wheel mounting portion 40 is formed on the other side of the wheel hub 10 so that the inner ring 11 can be mounted. The other side of the inner ring mounting portion 40 includes a stepped bend 50 radially outward. The bending portion 50 serves to hold the inner wheel 11 mounted on the wheel hub 10.

The inner ring 11 has a cylindrical shape and is press-fitted into the inner ring mounting portion 40 of the wheel hub 10. An inner race raceway (44) is formed on the outer peripheral surface of the inner ring (11).

The outer ring 12 is formed into a hollow cylindrical shape so as to surround the outer circumferential surface of the wheel hub 10. That is, the wheel hub 10 and the hollow into which the inner ring 11 is inserted are formed inside the radius of the outer ring 12 along the central axis. An outer ring flange 39 is formed on the outer circumferential surface of the outer ring 12 so as to extend radially outward and the outer ring flange 39 has an outer ring bolt hole 39 for attaching the wheel bearing 1 to a vehicle body (37) are formed. 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 43. 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 44.

The first rolling member 13 is installed between the first outer race raceway 41 and the hub raceway 43 and the second rolling member 113 is disposed between the second outer race raceway 42 and the inner race raceway 43. [ (44). ≪ / RTI > The first rolling member 13 and the second rolling member 113 may have various shapes such as a ball shape or a cylindrical shape. One ball bearing constituting the first rolling member (13) and the second rolling member (113) is spaced apart from other ball bearings adjacent to each other by a retainer (16).

The first sealing device 14 is mounted on one end of the outer ring 12 to prevent foreign matter from penetrating into the space between the outer ring 12 and the bent portion 30 of the wheel hub 10.

The second sealing device 15 is coupled to the other side of the wheel hub 10 to close a radial space formed between the inner ring 11 and the outer ring 12 and to close the radial space formed between the inner ring 11 and the outer ring 12, Thereby preventing foreign matter from penetrating into the apparatus.

The wheel hub 10 further includes an intermediate portion 100 between the bend portion 30 and the inner wheel mounting portion 40. The intermediate portion 100 of the wheel hub 10 will be described in more detail with reference to FIGS.

The intermediate portion 100 is formed in a shape that extends from the bent portion 30 to the other side and has a reduced weight between the first rolling member 13 and the second rolling member 113. As shown in FIGS. 2 to 3, the intermediate portion 100 includes at least one protrusion 60 and at least one recess 70.

Each of the projections 60 is formed in a shape protruding radially outward. The radially outer end of the protrusion 60 is located on an extension line extending from the center F of the bolt hole 21 to the central axis C of the wheel hub 10. That is, the outermost end in the radial direction of the projecting portion 60 is located on the extension line of the center F of the bolt hole 21. Each of the recesses (70) is formed to have a recessed shape by a depth (H) set radially inward between the respective projecting portions (60).

When the wheel is rotated, the load of the vehicle is transmitted to the wheel bearing 1 through the hub bolts 23 connected to the wheels. 3, the load is increased from the center F of the bolt hole 21 on which the hub bolts 23 are mounted to the direction of the central axis C of the wheel hub 10 , "Load direction"). Therefore, according to the embodiment of the present invention, the protrusion 60 is formed on the portion of the wheel hub 10 directly receiving the load in the load direction, so that the wheel hub 10 can withstand the load.

On the other hand, the load due to the hub bolt 23 is not directly transmitted to the radially inner side of the tool assembly hole 25. Further, since the tool assembly hole 25 is formed, the load is reduced in the radially inner portion. Accordingly, the recess 70 located inside the radius of the tool assembly hole 25 receives a smaller load than the protrusion 60, so that rigidity can be maintained even if the recess is formed into a recessed shape by the set depth H. [

That is, according to the conventional technology, the intermediate portion of the wheel hub is formed in a circular shape in section, but according to the embodiment of the present invention, the recess 70, which is recessed radially inwardly on the outer peripheral surface of the circular intermediate portion, The wheel hub 10 can maintain the same rigidity and at the same time reduce the volume and weight of the wheel hub 10 as much as it is recessed radially inwardly than the conventional technique.

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 (9)

A wheel hub disposed on a radially inner peripheral surface of the outer ring and having a plurality of rolling elements disposed therebetween,
The wheel hub
A flange formed in a disc shape extending radially outward from the one end thereof; And
An intermediate portion extending from the flange to the other side;
/ RTI >
The intermediate portion
And at least one recessed portion that is recessed radially inwardly.
The method according to claim 1,
The flange includes a bolt hole to which a hub bolt is mounted; And
Wherein a tool assembly hole for inserting a tool is formed.
3. The method of claim 2,
The radially innermost end of the recess
Wherein the wheel hub is located at least on a straight line passing through the center of the tool assembly hole and the center of the wheel hub.
The method of claim 3,
The intermediate portion
And at least one protrusion radially outwardly projecting therefrom,
The protrusion
And a plurality of concave portions formed between adjacent concave portions,
The radially outermost end of the protrusion
Wherein the wheel hub is located at least on a straight line passing from the center of the bolt hole to the center of the wheel hub.
5. The method of claim 4,
The wheel hub
A hub raceway on which the rolling element is mounted on a radially outer circumferential surface of the wheel hub; And
A stepped inner ring mounting portion radially inward from the other side of the intermediate portion;
Further comprising:
The intermediate portion
Wherein the hub hub is located between the hub raceway and the inner wheel mounting portion.
Wherein a flange is formed radially outward at one end portion, an inner ring mounting portion is formed at an outer circumferential surface of the other end portion, an intermediate portion is formed between the flange and the inner ring mounting portion, and the intermediate portion has at least one A wheel hub comprising a concave portion;
An outer ring spaced apart from the wheel hub by a predetermined distance outside the wheel hub and surrounding the wheel hub; And
A plurality of rolling elements disposed between the wheel hub and the outer ring;
≪ / RTI >
The method according to claim 6,
The flange includes a bolt hole to which a hub bolt is mounted; And
Wherein a tool assembly hole for inserting a tool is formed.
8. The method of claim 7,
The radially innermost end of the recess
And at least on a straight line passing through the center of the tool assembly hole and the center of the wheel hub.
9. The method of claim 8,
Wherein the intermediate portion includes at least one protrusion radially outwardly projecting,
Wherein the projecting portion is formed between the adjacent recessed portions,
The radially outermost end of the protrusion
And at least on a straight line passing through the center of the wheel hub from the center of the bolt hole.

KR1020150007006A 2015-01-14 2015-01-14 Wheel hub and wheel bearing assembly provided with the smae KR20160087701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150007006A KR20160087701A (en) 2015-01-14 2015-01-14 Wheel hub and wheel bearing assembly provided with the smae

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150007006A KR20160087701A (en) 2015-01-14 2015-01-14 Wheel hub and wheel bearing assembly provided with the smae

Publications (1)

Publication Number Publication Date
KR20160087701A true KR20160087701A (en) 2016-07-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150007006A KR20160087701A (en) 2015-01-14 2015-01-14 Wheel hub and wheel bearing assembly provided with the smae

Country Status (1)

Country Link
KR (1) KR20160087701A (en)

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