Wheel bearing device for vehicle

Abstract

A wheel bearing device for a vehicle includes: a hub connected to a wheel and rotatable with the wheel; an outer ring spaced apart from an outer side of the hub and fixed to a vehicle body; the oil slinger is coupled with the hub; a frame coupled to the outer ring and spaced apart from the slinger; and the sealing part is arranged on the frame, is separated from the hub and can be in contact with the oil slinger. In the wheel bearing device for the vehicle, the hub may be provided with a groove for storing moisture and foreign matter. Since the slinger extension portion is inclined at a set angle, entering moisture and foreign matter can be guided by the slinger extension portion and stored in the groove portion, thereby preventing moisture and foreign matter from entering the bearing portion.

Description

TECHNICAL FIELD

[0001] Exemplary embodiments according to the present disclosure relate to a wheel bearing device for a vehicle, and more particularly, to a wheel bearing device for a vehicle capable of preventing entry of foreign substances and reducing drag torque. BACKGROUND

[0002] A wheel bearing for a vehicle is a device installed between a vehicle body and a wheel to facilitate rotation of the wheel. The wheel bearing provides a moving ability to a vehicle by rotatably supporting a wheel as a rotating element on a vehicle body as a non-rotating element.

[0003] The wheel bearing can be classified into a drive wheel bearing that transmits power generated by an engine and a driven wheel bearing that does not transmit driving force.

[0004] Since the wheel bearing is installed on the wheel of the vehicle, the wheel bearing is easily exposed to foreign substances such as dust and moisture. Therefore, the wheel bearing is provided with a sealing device to prevent entry of foreign substances into the wheel bearing.

[0005] The related art of the present disclosure is disclosed in Korean Patent Application No. 10-2022-0142769 (published on October 24, 2022, entitled "Wheel bearing device for a vehicle"). SUMMARY

[0006] Various embodiments of the present disclosure aim to provide a wheel bearing device for a vehicle capable of preventing entry of external foreign substances and leakage of internal lubricating oil.

[0007] In addition, embodiments of the present disclosure aim to provide a wheel bearing device for a vehicle capable of reducing drag torque, thereby improving fuel efficiency and energy efficiency.

[0008] The wheel bearing device for a vehicle according to an embodiment of the present disclosure includes a hub connected to a wheel and rotatable together with the wheel, an outer ring spaced apart from an outer side of the hub and fixed to a vehicle body, a slinger coupled to the hub, a frame coupled to the outer ring and spaced apart from the slinger, and a sealing portion provided on the frame, spaced apart from the hub, and contactable with the slinger.

[0009] The slinger can include a slinger fixing portion fixed on a first surface of the hub, a slinger curved portion curved from the slinger fixing portion in a radial direction of the hub, and a slinger extension portion obliquely extended from the slinger curved portion toward an inner surface of the outer ring and forming an acute angle with the slinger fixing portion.

[0010] The slinger further includes a sealing member disposed on the slinger curved portion and configured to seal between the first surface and the slinger fixed portion.

[0011] The frame can include a first frame fixed portion fixed to an end surface of the outer ring, a first frame curved portion curved from one side of the first frame fixed portion in a first axial direction of the hub, a first frame extension portion configured to extend obliquely from the first frame curved portion toward a second surface of the hub, the second surface intersecting the first surface of the hub, and the first frame extension portion forming an obtuse angle with the first frame fixed portion, a second frame curved portion curved from the other side of the first frame fixed portion in a second axial direction of the hub opposite to the first axial direction, a second frame fixed portion coupled to the second frame curved portion and fixed to the inner surface of the outer ring, a third frame curved portion curved from the second frame fixed portion in a central direction of the hub, and a second frame extension portion configured to extend obliquely from the third frame curved portion toward the first surface and disposed in parallel with the slinger extension portion.

[0012] A free end of the slinger extension portion can be located between the second frame fixed portion and the second frame extension portion.

[0013] The sealing portion can include a sealing body portion disposed on the frame, and a sealing lip portion configured to protrude from the sealing body portion and contact the slinger extension portion.

[0014] The sealing body portion can include a first sealing body portion configured to surround the first frame extension portion and spaced apart from a first portion of the second surface, a second sealing body portion disposed on the second frame extension portion and from which the sealing lip portion protrudes, and a third sealing body portion configured to be connected between the first sealing body portion and the second sealing body portion.

[0015] The sealing body portion can further include a sealing extension portion configured to extend from the first sealing body portion to surround the first frame curved portion and seal between an outer surface of the outer ring and the first frame fixed portion.

[0016] The sealing lip portion can include a first sealing lip portion configured to extend from the second sealing body portion in the first axial direction, and a second sealing lip portion spaced apart from the first sealing lip portion and curved from the second sealing body portion to extend in a radial direction of the hub.

[0017] The hub can have a groove portion recessed in a second portion of the second surface.

[0018] In a wheel bearing device for a vehicle, a groove portion can be provided in a hub for storing moisture and foreign matter. Since the oil slinger extension is inclined at a set angle, the entering moisture and foreign matter can be guided by the oil slinger extension and stored in the groove portion, thereby preventing the moisture and foreign matter from entering a bearing portion.

[0019] In a wheel bearing device for a vehicle, the oil slinger extension inclined at a set angle can be provided in parallel with the second frame extension, thereby forming a narrow path between the oil slinger extension and the second frame extension, which can prevent the moisture and foreign matter from entering the bearing portion.

[0020] In a wheel bearing device for a vehicle, first and second seal lip portions can be provided between the oil slinger extension and the second frame extension to block leakage of lubricating oil filled in the bearing portion and to block entry of moisture and foreign matter into the bearing portion. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A perspective view of a wheel bearing device for a vehicle according to an embodiment of the disclosure is shown.

[0022] Figure 2 A side cross-sectional view of a wheel bearing device for a vehicle according to an embodiment of the disclosure is shown.

[0023] Figure 3 A partial enlarged cross-sectional view of Figure 2 is shown.

[0024] Figure 4 A partial enlarged cross-sectional view of Figure 3 is shown.

[0025] Figure 5 A partial enlarged cross-sectional view of Figure 3 is shown, illustrating a guide path when moisture enters a wheel bearing device for a vehicle according to an embodiment of the disclosure. DETAILED DESCRIPTION

[0026] Embodiments of a wheel bearing device for a vehicle according to the disclosure will be described below with reference to the accompanying drawings. In the process, the thickness of lines and the size of elements shown in the drawings can be exaggerated for the sake of clarity and ease of description. Also, the terms used below are defined in consideration of their functions in the disclosure, and can vary according to the intention or custom of the user or operator. Therefore, these terms should be defined in the context of the specification.

[0027] Figure 1 A perspective view of a wheel bearing device for a vehicle according to an embodiment of the disclosure is shown. Figure 2 A side cross-sectional view of a wheel bearing device for a vehicle according to an embodiment of the disclosure is shown.Figure 3 is a partially enlarged sectional view. Figure 2 is a partially enlarged sectional view. Figure 4 is a partially enlarged sectional view. Figure 3 is a partially enlarged sectional view.

[0028] Referring to Figures 1 to 4 , a wheel bearing device 1 for a vehicle according to an embodiment of the disclosure includes a hub 100, an outer race 200, an oil slinger 300, a frame 400, and a sealing portion 500, which will be described in detail below.

[0029] The hub 100 can form an outline of one side (a left side of Figure 2 ) of the wheel bearing device 1 for a vehicle according to an embodiment of the disclosure, and support the outer race 200, the oil slinger 300, the frame 400, and the sealing portion 500, which will be described below.

[0030] The hub 100 can be coupled to a drive shaft (not shown) inside. The hub 100 can rotate together with the drive shaft, and serve as a rotating element that transmits a rotational force generated from the drive shaft to a wheel.

[0031] The hub 100 can be formed in a hollow cylindrical shape and located in a direction parallel to the wheel axial direction. The drive shaft can be inserted into the inside of the hub 100 through the hollow portion of the hub 100.

[0032] The wheel bearing device 1 for a vehicle according to an embodiment of the disclosure can include an inner race 10. The inner race 10 can be coupled to the hub 100 and rotate together with the hub 100 when the hub 100 rotates. The drive shaft is located on one side of the inner race 10.

[0033] The inner race 10 can be configured to integrally perform a function of supporting the drive shaft, which has conventionally been performed by separate members such as a washer, a steel plate, or the like.

[0034] The outer race 200 can form an outline of the other side (a right side of Figure 2 ) of the wheel bearing device 1 for a vehicle according to an embodiment of the disclosure, and be spaced apart from the hub 100 and the inner race 10. The outer race 200 can be fixed to a vehicle body to function as a non-rotating element that does not rotate together with the hub 100 and the inner race 10 when the wheel rotates.

[0035] The outer race 200 can be formed in a hollow cylindrical shape. The outer race 200 can be disposed to face an outer circumferential surface of the inner race 10 and the hub 100 while being spaced apart from the hub 100 by a set distance in a radial direction R thereof.

[0036] A wheel bearing device 1 for a vehicle according to an embodiment of the present disclosure can include a bearing portion 20. The bearing portion 20 can be disposed between the hub 100 and the outer race 200 and between the inner race 10 and the outer race 200, and can rotatably support the hub 100 and the inner race 10 with respect to the outer race 200.

[0037] The bearing portion 20 can be disposed in a blank space formed between the outer race 200 and the hub 100 and between the outer race 200 and the inner race 10, thereby supporting the relative rotation of the hub 100 and the inner race 10 with respect to the outer race 200.

[0038] The bearing portion 20 can be a rolling bearing. The bearing portion 20 can include one rolling element. The rolling element can be a steel ball having a circular cross-section. The bearing portion 20 can be provided in pairs and spaced apart from each other by a set distance in the axial directions AX1 and AX2 of the hub 100. In order to facilitate the rolling of the rolling element, the bearing portion 20 and the area around the same can be filled with lubricating oil (grease).

[0039] The slinger 300 can be coupled to the hub 100. The slinger 300 can include a metal formed in a ring shape and press-fitted onto the outer circumferential surface of the hub 100. The slinger 300 can include a slinger fixing portion 310, a slinger curved portion 320, and a slinger extension portion 330.

[0040] The slinger fixing portion 310 can be fixed on the first surface 101 of the hub 100. The slinger fixing portion 310 can be located in a direction parallel to the axial directions AX1 and AX2 of the hub 100 and in close contact with the first surface 101 of the hub 100.

[0041] The slinger curved portion 320 can be disposed on one side (left side) of the slinger fixing portion 310. Figure 4 The slinger curved portion 320 can be formed to be curved from the end of the slinger fixing portion 310 on one side in the radial direction R of the hub 100. The slinger curved portion 320 can be spaced apart from the second surface 102 of the hub 100, which intersects the first surface 101 of the hub 100.

[0042] The slinger extension portion 330 can extend from the slinger curved portion 320 toward the outer race 200. The slinger extension portion 330 can extend from the end of the slinger curved portion 320 toward the inner surface 201 of the outer race 200 in an inclined manner and at a set angle.

[0043] The slinger extension portion 330 can form an acute angle with the slinger fixing portion 310. The inner angle between the slinger fixing portion 310 and the slinger extension portion 330 can be about 45 degrees or more and less than about 90 degrees. The free end 331 of the slinger extension portion 330 can be located between the second frame fixing portion 450 and the second frame extension portion 470, which will be described below.

[0044] The slinger 300 according to the embodiments of the disclosure can further include a sealing member 340. The sealing member 340 can be disposed on an outer surface of the slinger curved portion 320. The sealing member 340 can include an elastically deformable rubber.

[0045] The sealing member 340 can be integrally formed with the slinger 300. In addition, the sealing member 340 can be integrally formed with the slinger curved portion 320 by insert injection molding.

[0046] The sealing member 340 can be sealed between the first surface 101 of the hub 100 and the slinger fixing portion 310, thereby preventing external foreign substances such as moisture from entering between the first surface 101 of the hub 100 and the slinger fixing portion 310.

[0047] The frame 400 can be coupled to the outer ring 200. The frame 400 can include a metal, be formed in a ring shape, and be press-fitted to the outer ring 200. The frame 400 can be spaced apart from the hub 100 and the slinger 300.

[0048] The frame 400 can include a first frame fixing portion 410, a first frame curved portion 420, a first frame extension portion 430, a second frame curved portion 440, a second frame fixing portion 450, a third frame curved portion 460, and a second frame extension portion 470.

[0049] The first frame fixing portion 410 can be fixed to the end surface 202 of the outer ring 200. In addition, the first frame fixing portion 410 can be fixed to the end surface 202 of the outer ring 200 facing the second surface 102 of the hub 100.

[0050] The first frame fixing portion 410 can be located in a direction parallel to the center direction C or the radial direction R of the hub 100 and in close contact with the end surface 202 of the outer ring 200.

[0051] The first frame curved portion 420 can be disposed on one side (an upper side) of the first frame fixing portion 410. The first frame curved portion 420 can be formed to be curved from an end portion of one side of the first frame fixing portion 410 in the first axial direction AX1 of the hub 100. Figure 4 The first frame extension portion 430 can extend from the first frame curved portion 420 toward the second surface 102 of the hub 100 intersecting the first surface 101 of the hub 100. The first frame extension portion 430 can extend in an inclined manner at a set angle from an end portion of the first frame curved portion 420 toward the second surface 102 of the hub 100.

[0052]

[0053] ​The first frame extension 430 can be spaced apart from the second surface 102 of the hub 100. The first frame extension 430 can form an obtuse angle with the first frame fixing portion 410.

[0054] The second frame curved portion 440 can be disposed on the other side (left side) of the first frame fixing portion 410. Figure 4 The second frame curved portion 440 can be formed to be curved from the end portion of the other side of the first frame fixing portion 410 in the second axial direction AX2 of the hub 100, which is opposite to the first axial direction AX1 of the hub 100.

[0055] The second frame fixing portion 450 can be coupled to one side (left side) of the second frame curved portion 440 and fixed to the inner surface 201 of the outer ring 200. Figure 4 The second frame fixing portion 450 can intersect the end surface 202 of the outer ring 200 and be fixed to the inner surface 201 of the outer ring 200 facing the first surface 101 of the hub 100.

[0056] The second frame fixing portion 450 can be located in a direction parallel to the axial directions AX1 and AX2 of the hub 100 and in close contact with the inner surface 201 of the outer ring 200.

[0057] The third frame curved portion 460 can be disposed on the other side (right side) of the second frame fixing portion 450. Figure 4 The third frame curved portion 460 can be formed to be curved from the end portion of the other side of the second frame fixing portion 450 in the center direction C of the hub 100.

[0058] The second frame extension 470 can extend from the third frame curved portion 460 toward the first surface 101 of the hub 100. The second frame extension 470 can extend obliquely from the end portion of the third frame curved portion 460 toward the first surface 101 of the hub 100 at a set angle.

[0059] The second frame extension 470 can be disposed in parallel with the oil slinger extension 330. The second frame extension 470 can have the same inclination angle as the oil slinger extension 330.

[0060] The free end 331 of the oil slinger extension 330 can be located between the second frame fixing portion 450 and the second frame extension 470.

[0061] The sealing portion 500 can be disposed on the frame 400. The sealing portion 500 can include an elastically deformable rubber. The sealing portion 500 can be integrally formed with the frame 400. In addition, the sealing portion 500 can be integrally formed with the frame 400 by an insert injection molding method.

[0062] The sealing portion 500 can be spaced apart from the wheel hub 100 and in contact with the slinger 300. The sealing portion 500 can be spaced apart from the first surface 101 and the second surface 102 of the wheel hub 100 and in contact with the slinger extension 330. The sealing portion 500 can include a sealing body portion 510 and a sealing lip portion 520.

[0063] The sealing body portion 510 can be disposed on the frame 400. The sealing body portion 510 can include a first sealing body portion 511, a second sealing body portion 512, and a third sealing body portion 513.

[0064] The first sealing body portion 511 can completely surround the first frame extension 430 and be spaced apart from the second surface 102 of the wheel hub 100. In addition, an end portion of the first sealing body portion 511 can be spaced apart from the first portion 102a of the second surface 102. The distance of the spacing between the first portion 102a of the second surface 102 and the end portion of the first sealing body portion 511 can be 0.3 mm to 0.4 mm.

[0065] The second sealing body portion 512 can be disposed on the second frame extension 470. The second sealing body portion 512 can have the sealing lip portion 520. The sealing lip portion 520 can be formed to protrude from an outer surface of the second sealing body portion 512 toward the slinger extension 330.

[0066] The third sealing body portion 513 can be connected between the first sealing body portion 511 and the second sealing body portion 512.

[0067] The sealing body portion 510 according to the embodiment of the disclosure can further include a sealing extension 514. The sealing extension 514 can extend from the first sealing body portion 511 to surround the first frame bend 420.

[0068] The sealing extension 514 can seal between the outer surface 203 of the outer ring 200 and the first frame fixing portion 410, thereby preventing external foreign substances such as moisture from entering between the outer surface 203 of the outer ring 200 and the first frame fixing portion 410.

[0069] The sealing lip portion 520 can protrude from the sealing body portion 510. The sealing lip portion 520 can be formed on the second sealing body portion 512. The sealing lip portion 520 can protrude toward the slinger extension 330 and be in contact with the slinger extension 330. The sealing lip portion 520 can be elastically deformed. The sealing lip portion 520 can include a first sealing lip portion 521 and a second sealing lip portion 522.

[0070] The first seal lip 521 can extend from the outer surface of the second seal body 512 in the first axial direction AX1 of the hub 100 and be in contact with the oil slinger extension 330. The first seal lip 521 can be located in a direction parallel to the axial directions AX1 and AX2 of the hub 100, and an end of the first seal lip 521 can be in contact with the outer surface of the oil slinger extension 330.

[0071] The second seal lip 522 can be spaced apart from the first seal lip 521. The second seal lip 522 can be spaced apart from the first seal lip 521 by a set distance in the radial direction R of the hub 100.

[0072] The second seal lip 522 can be bent from the outer surface of the second seal body 512 to extend in the radial direction R of the hub 100 and be in contact with the oil slinger extension 330. In addition, an end of the second seal lip 522 can be in contact with the outer surface of the oil slinger extension 330.

[0073] The hub 100 according to an embodiment of the disclosure can have a groove 110. The groove 110 can be provided in the second surface 102 of the hub 100. The groove 110 can be recessed into the second portion 102b of the second surface 102. The second portion 102b can be spaced apart from the first portion 102a by a set distance in the radial direction R of the hub 100.

[0074] Moisture entering through the space formed between the first portion 102a of the second surface 102 and the end of the first seal body 511 can be stored in the groove 110.

[0075] Figure 5 For Figure 3 A partial enlarged sectional view illustrating a guide path when moisture enters a wheel bearing apparatus for a vehicle according to an embodiment of the disclosure.

[0076] Referring to Figures 1 to 5 An end of the first seal body 511 spaced apart from the second surface 102 of the hub 100 can be configured to be as close as possible to the first portion 102a of the second surface 102, thereby minimizing entry of external foreign substances and improving sealing performance.

[0077] When moisture and foreign substances enter through the space formed between the first portion 102a of the second surface 102 and the end of the first seal body 511, they can be blocked by the oil slinger extension 330 tilted at a set angle. This can prevent the moisture and foreign substances from intruding into the bearing portion 20, and thus can improve sealing performance.

[0078] When the moisture and foreign substances enter through the space formed between the first portion 102a of the second surface 102 and the end of the first sealing body part 511, the moisture and foreign substances can be guided to the first portion 102a of the second surface 102 by the oil slinger extension 330 inclined at a set angle. In other words, the entering moisture and foreign substances can be directed to the groove part 110 along the inclined surface of the oil slinger extension 330. Figure 5 The arrow shown in the middle represents a guide path of the moisture when entering.

[0079] The moisture stored in the groove part 110 can be discharged to the outside through the centrifugal force of the rotating hub 100 via the space formed between the first portion 102a of the second surface 102 and the end of the first sealing body part 511. Alternatively, the moisture can flow in the direction of gravity, i.e., in the radial direction of the hub 100, and be naturally discharged to the outside through the space formed between the first portion 102a of the second surface 102 and the end of the first sealing body part 511.

[0080] By providing the free end 331 of the oil slinger extension 330 between the second frame fixing part 450 and the second frame extension 470 and configuring the free end to be as close as possible to the second frame fixing part 450, the moisture and foreign substances, which enter through the space between the first portion 102a and the end of the first sealing body part 511 and flow downward along the vertical surface of the first frame fixing part 410, can be directed to the groove part 110 along the inclined surface of the oil slinger extension 330 inclined at a set angle. Accordingly, by preventing the moisture and foreign substances from entering the bearing part 20, the sealing performance can be improved.

[0081] The oil slinger extension 330 inclined at a set angle and the second frame extension 470 can be provided in parallel, thereby forming a narrow path between the oil slinger extension 330 and the second frame extension 470, and thus making it difficult for the moisture and foreign substances to enter.

[0082] The first sealing lip part 521 provided between the oil slinger extension 330 and the second frame extension 470 and parallel to the axial directions AX1 and AX2 of the hub 100 can prevent the lubricating oil filled in the bearing part 20 from leaking to the outside through the path formed between the oil slinger extension 330 and the second frame extension 470. In other words, the first sealing lip part 521 can block the leakage of the lubricating oil.

[0083] The second sealing lip part 522 located between the oil slinger extension 330 and the second frame extension 470 and configured to be bent to extend in the radial direction R of the hub 100 can prevent the moisture and foreign substances from entering the bearing part 20. In other words, the second sealing lip part 522 can block the entry of the moisture and foreign substances.

[0084] In the wheel bearing device 1 for a vehicle according to the embodiment of the present disclosure, the groove portion 110 for storing moisture and foreign matter can be provided in the wheel hub 100. Due to the oil slinger extension 330 inclined at a set angle, the entering moisture and foreign matter can be guided by the oil slinger extension 330 and stored in the groove portion 110, thereby preventing the moisture and foreign matter from entering the bearing portion 20.

[0085] In the wheel bearing device 1 for a vehicle according to the embodiment of the present disclosure, the oil slinger extension 330 and the second frame extension 470 inclined at a set angle can be provided in parallel, thereby forming a narrow path between the oil slinger extension 330 and the second frame extension 470, and further preventing the moisture and foreign matter from entering the bearing portion 20.

[0086] In the wheel bearing device 1 for a vehicle according to the embodiment of the present disclosure, the first seal lip portion 521 and the second seal lip portion 522 can be provided between the oil slinger extension 330 and the second frame extension 470 to block the leakage of the lubricating oil filled in the bearing portion 20, and to block the moisture and foreign matter from entering the bearing portion 20.

[0087] While the embodiments of the present disclosure have been described in conjunction with the accompanying drawings, these embodiments are for illustrative purposes only and it will be understood by those skilled in the art that various modifications and other equivalent embodiments can be made from the embodiments disclosed herein.

Claims

1. A wheel bearing apparatus for a vehicle, characterized by, The wheel bearing device includes: a hub connected to a wheel and rotatable with the wheel; an outer ring spaced apart from an outer side of the hub and fixed to a vehicle body; a slinger coupled with the hub; a frame coupled with the outer ring and spaced apart from the slinger; and a seal portion provided on the frame, spaced apart from the hub, and contactable with the slinger, wherein the slinger includes: a slinger fixing portion fixed on a first surface of the hub; a slinger curved portion curved from the slinger fixing portion in a radial direction of the hub; and a slinger extension portion configured to extend obliquely from the slinger curved portion toward an inner surface of the outer ring and form an acute angle with the slinger fixing portion.

2. The wheel bearing apparatus according to claim 1, characterized by The slinger further includes: a sealing member provided on the slinger curved portion and configured to seal between the first surface and the slinger fixing portion.

3. The wheel bearing apparatus of claim 1 wherein, The frame includes: a first frame fixing portion fixed to an end surface of the outer ring; a first frame curved portion curved from one side of the first frame fixing portion in a first axial direction of the hub; a first frame extension portion configured to extend obliquely from the first frame curved portion toward a second surface of the hub, the second surface intersecting the first surface of the hub, and the first frame extension portion forming an obtuse angle with the first frame fixing portion; a second frame curved portion curved from the other side of the first frame fixing portion in a second axial direction of the hub opposite to the first axial direction; a second frame fixing portion coupled with the second frame curved portion and fixed to the inner surface of the outer ring; a third frame curved portion curved from the second frame fixing portion in a central direction of the hub; and a second frame extension portion configured to extend obliquely from the third frame curved portion toward the first surface and disposed in parallel with the slinger extension portion.

4. A wheel bearing arrangement according to claim 3, characterised in that A free end of the slinger extension portion is located between the second frame fixing portion and the second frame extension portion.

5. The wheel bearing apparatus of claim 3 wherein, The seal portion includes: a seal body portion provided on the frame; and a seal lip portion configured to protrude from the seal body portion and contact the slinger extension portion.

6. A wheel bearing arrangement according to claim 5, characterised in that The seal body portion includes: a first seal body portion configured to surround the first frame extension portion and spaced apart from a first portion of the second surface; a second seal body portion provided on the second frame extension portion and from which the seal lip portion protrudes; a third seal body portion configured to be connected between the first seal body portion and the second seal body portion.

7. A wheel bearing arrangement according to claim 6, characterised in that The seal body portion further includes: a seal extension portion configured to extend from the first seal body portion to surround the first frame curved portion and seal between an outer surface of the outer ring and the first frame fixing portion.

8. A wheel bearing arrangement according to claim 6, characterised in that The seal lip portion includes: a first seal lip portion configured to extend from the second seal body portion in the first axial direction; and a second seal lip portion spaced apart from the first seal lip portion and curved from the second seal body portion to extend in a radial direction of the hub.

9. The wheel bearing apparatus of claim 3 wherein, The hub has a recessed channel in a second portion of the second surface. The hub has a recessed channel in a second portion of the second surface.

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