Wheel bearing including clamping ring with sealing function

Abstract

Wheel bearing (100) for supporting a wheel of a vehicle so that the wheel can be rotatably mounted on a vehicle body, wherein the wheel bearing (100) has: one or more outer rings (200, 210, 220) configured to support multiple rows of rolling elements in a radially outward direction; a multitude of inner rings (300, 310, 320) configured to support the multiple rows of rolling elements in a radially inward direction; the multiple rows of rolling elements arranged between the one or more outer rings (200, 210, 220) and the plurality of inner rings (300, 310, 320) to assist relative rotation between the one or more outer rings and the plurality of inner rings (300, 310, 320); and a clamping ring (500, 600) coupled between the plurality of inner rings (300, 310, 320) to couple the plurality of inner rings (300, 310, 320) together, wherein the clamping ring (500, 600) includes a frame (510, 610) and a sealing section (520, 620) attached to the frame (510, 610), wherein the frame (510, 610) of the clamping ring (500, 600) comprises: a first axial extension section (514, 614) that extends in an axial direction; a second axial extension section (516, 616) extending in the other axial direction; and a central section (512, 612) located between the first axial extension section (514, 614) and the second axial extension section (516, 616) to extend in a radial direction, wherein the central section (512, 612) of the clamping ring (500, 600) is inserted into and coupled to receiving grooves (312, 322) provided on end sections of the plurality of inner rings (300, 310, 320), and wherein the central section (512, 612) of the clamping ring (500, 600) is formed in a folded structure.

Description

TECHNICAL FIELD

[0001] The present invention relates to a wheel bearing configured such that a plurality of inner rings are connected by a clamp ring, and more particularly to a wheel bearing configured such that a function of fixing a plurality of inner rings and performing sealing can be performed by integrally forming a sealing part with a clamp ring configured to connect the plurality of inner rings. BACKGROUND

[0002] A bearing is a part that supports a rotating element relative to a non-rotating element in a rotating device. A wheel bearing is used to support a vehicle wheel, allowing the wheel to be rotatably mounted on a vehicle body.

[0003] Such a wheel bearing is typically configured such that a rotating member to which the wheel is mounted is coupled to a non-rotating member fixed to the vehicle body by rolling elements to rotatably support the wheel mounted on the rotating member with respect to the vehicle body.

[0004] Balls, tapered rollers, or similar materials are used as rolling elements in wheel bearings. Balls are primarily used as rolling elements in wheel bearings for small cars. Tapered rollers are primarily used as rolling elements in wheel bearings for medium-sized commercial vehicles, such as buses or trucks.

[0005] With reference to Fig. 1 is an example of a wheel bearing that can be used for medium-sized commercial vehicles.

[0006] As in Fig. As illustrated in Figure 1, a prior art medium-sized commercial vehicle 10 is configured such that an outer ring 20 is relatively supported with respect to inner rings 30 having multiple rows of rolling elements 40. One or both end portions of the wheel bearing are provided with a sealing member 50 to prevent external foreign matter from entering a bearing space in which the rolling elements 40 are located or to prevent lubricant filled in the bearing space from leaking to the outside.

[0007] On the other hand, as illustrated in the drawing, the wheel bearing 10 including the plurality of inner rings 30 is configured such that a clamp ring 60 is fixed between the plurality of inner rings 30 to couple the plurality of inner rings 30 to each other.

[0008] The wheel bearing 10 with such a structure in the prior art is configured such that the clamp ring 60 is fixed to the inner peripheral surfaces of the inner rings 30. Fixing the clamp ring 60 in this manner can be a troublesome task. In addition, to prevent oil in a vehicle shaft and a bearing lubricant from mixing with each other, a sealing member (not illustrated) (center seal) must be additionally provided at a location where the plurality of inner rings 30 are coupled to each other. This causes an increase in complexity.

[0009] A wheel bearing as described above is also known, for example, from DE 10 2018 208 195 A1. This also shows a wheel bearing with a plurality of outer rings configured to support a plurality of rows of rolling elements in a radially outward direction, a plurality of inner rings configured to support the plurality of rows of rolling elements in a radially inward direction, a plurality of rows of rolling elements arranged between the one or more outer rings and the plurality of inner rings to support relative rotation between the one or more outer rings and the plurality of inner rings, and a clamp ring coupled between the plurality of inner rings to couple the plurality of inner rings to one another. The clamp ring has a frame and a sealing portion attached to the frame.Such wheel bearings are also described in DE 195 26 167 A1 and DE 10 2015 218 865 A1.

[0010] Further bearings with inner rings coupled to each other by a Lammer ring, which is realized without a sealing section attached to a frame, are described in US 5 641 239 A and in DE 10 2017 111 043 A1. SUMMARY

[0011] The present invention has been made to solve the above-mentioned problems, and the present invention has the purpose of providing a wheel bearing configured such that a sealing portion is formed integrally with a clamp ring coupling a plurality of inner rings to perform both a function of fixing the plurality of inner rings and a sealing function by the clamp ring.

[0012] Representative configurations of the present invention for solving the above-mentioned problems are described below.

[0013] According to the invention, a wheel bearing having the features of claim 1 is provided. According to the invention, a wheel bearing having the features of claim 7 is also provided.

[0014] According to the present invention, a wheel bearing is provided for supporting a wheel of a vehicle such that the wheel is rotatably mountable on a vehicle body. The wheel bearing according to the present invention comprises: one or more outer rings configured to support a plurality of rows of rolling elements in a radially outward direction; a plurality of inner rings configured to support the plurality of rows of rolling elements in a radially inward direction; the plurality of rows of rolling elements disposed between the one or more outer rings and the plurality of inner rings to support relative rotation between the one or more outer rings and the plurality of inner rings; and a clamp ring coupled between the plurality of inner rings to couple the plurality of inner rings to each other.According to the present invention, the clamp ring includes a frame and a sealing portion n fixed to the frame.

[0015] According to the invention, the frame of the clamp ring has an axial extension section.

[0016] More specifically, the frame of the clamp ring includes: a first axial extension portion extending in one axial direction; a second axial extension portion extending in the other axial direction; and a central portion located between the first axial extension portion and the second axial extension portion to extend in a radial direction.

[0017] According to the invention, the central portion of the clamp ring is inserted into and coupled to receiving grooves provided at end portions of the plurality of inner rings.

[0018] According to the invention, the central portion of the clamp ring is formed in a folded structure.

[0019] According to one embodiment, the sealing portion of the clamp ring may be provided on a surface facing the plurality of inner rings on the axial extension portion of the frame of the clamp ring.

[0020] According to one embodiment, the sealing portion of the clamp ring may be provided between the frame of the clamp ring and the plurality of inner rings.

[0021] According to one embodiment, the sealing portion of the clamp ring may include an overmolded portion enclosing an end portion of the frame of the clamp ring.

[0022] According to one embodiment, the sealing portion of the clamp ring may be provided on a surface opposite the plurality of inner rings on the frame of the clamp ring.

[0023] According to one embodiment, the sealing portion of the clamp ring may include an overmolded portion enclosing an end portion of the frame of the clamp ring.

[0024] According to another aspect of the invention, the frame of the clamp ring includes a central portion and a bent portion formed to be bent from both ends of the central portion, and the bent portion can be received in and coupled to receiving grooves provided on the plurality of inner rings.

[0025] According to one embodiment, the bent portion of the frame of the clamp ring may be locked with the receiving grooves provided on the plurality of inner rings.

[0026] According to one embodiment, the bent portion of the frame of the clamp ring may be formed in an inclined structure in which a width gradually decreases toward an end of the bent portion.

[0027] According to the further aspect of the invention, the sealing portion of the clamp ring comprises a base portion attached to the frame of the clamp ring and a sealing lip formed to extend from the base portion.

[0028] According to one embodiment, the clamp ring may be configured to couple to outer peripheral surfaces of the plurality of inner rings.

[0029] Furthermore, the wheel bearing according to the present invention may include other additional configurations without departing from the technical gist of the present invention.

[0030] A wheel bearing according to the present invention is configured such that a sealing portion is integrally formed with a clamp ring that couples a plurality of inner rings, performing both a function of fixing the plurality of inner rings and a sealing function through the clamp ring. Thus, even if a separate sealing member (center seal) is not provided, it is possible to seal a location where the plurality of inner rings are coupled to each other, making it possible to prevent oil in a vehicle shaft and a bearing lubricant from mixing with each other. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 illustrates an example of a wheel bearing used in the prior art. Fig. 2 exemplifies a structure of a wheel bearing according to an embodiment of the present invention. Fig. 3 exemplifies a structure of a clamp ring according to an embodiment of the present invention. Fig. 4 exemplifies a structure of a clamp ring according to another embodiment of the present invention. Fig. 5 exemplifies a structure of a clamp ring according to yet another embodiment of the present invention. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present invention described below are provided for the purpose of describing the present invention as examples. The scope of the claims according to the present invention is not limited to the exemplary embodiments described below or the detailed descriptions of these exemplary embodiments.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention relates. All terms used herein are selected for the purpose of more clearly describing the present invention and not for limiting the scope of the present invention, which is defined by the appended claims.

[0033] Unless the phrase or sentence clearly indicates otherwise, the terms "comprising," "including," "having," and the like as used herein should be construed as open-ended terms that encompass the possibility of including other exemplary embodiments.

[0034] The term “axial direction” as used herein may be defined as a direction extending along a rotational center axis of a wheel bearing, the term “radial direction” as used herein may be defined as a direction perpendicular to the axial direction and away from the rotational center axis or approaching the rotational center axis.

[0035] The singular form described herein may include the plural form unless the context clearly dictates otherwise, and this applies equally to the singular form set forth in the claims.

[0036] Throughout this specification, when a component element is referred to as being "positioned" or "formed" on one side of another component element, the component element may be in direct contact with or directly formed on one side of another component element, or may be positioned or formed on another component element with yet another component element disposed therebetween.

[0037] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings to such an extent that they can be easily implemented by those skilled in the art. In the accompanying drawings, the same or corresponding components are assigned the same reference numerals. Furthermore, in the following descriptions of the exemplary embodiments, duplicate descriptions of the same or corresponding constituent elements may be omitted. However, although a description of a constituent element is omitted, such a constituent element is not intended to be excluded in any exemplary embodiment.

[0038] With reference to Fig. 2, a wheel bearing 100 according to an exemplary embodiment of the present invention is illustrated by way of example. As in Fig. As illustrated in Figure 2, the wheel bearing 100 according to an exemplary embodiment of the present invention may be configured in an overall configuration similar to a prior art wheel bearing. The wheel bearing 100 according to an exemplary embodiment of the present invention is configured such that an outer ring 200 is rotatably supported relative to an inner ring 300 by a plurality of rolling elements 400, as in the prior art wheel bearing.

[0039] According to an exemplary embodiment of the present invention, as in the prior art wheel bearing, the outer ring 200 is configured to support the rolling elements 400 in a radially outward direction. As illustrated in the drawing, a raceway surface for the rolling elements is provided on an inner peripheral surface of the outer ring 200.

[0040] According to an exemplary embodiment of the present invention, a plurality of outer rings 200 may be provided at intervals along the axial direction. For example, as illustrated in the drawing, the plurality of outer rings 200 may include a first outer ring 210 supporting a first row of rolling elements 410 and a second outer ring 220 supporting a second row of rolling elements 420.

[0041] According to an exemplary embodiment of the present invention, as in the prior art wheel bearing, the inner ring 300 is configured to support the rolling elements 400 in a radially inward direction. As illustrated in the drawing, a raceway surface for the rolling elements is provided on an outer peripheral surface of the inner ring 300.

[0042] According to an exemplary embodiment of the present invention, a plurality of inner rings 300 may be configured to include a first inner ring 310 supporting the first row of rolling elements 410 and a second inner ring 320 supporting the second row of rolling elements 420.

[0043] According to an exemplary embodiment of the present invention, the rolling elements 400 are arranged between the outer ring 200 and the above-described inner ring 300 to perform a function of supporting relative rotation between the outer ring 200 and the inner ring 300. As illustrated in the drawing, the plurality of rows of rolling elements may be provided to be spaced apart from each other in the axial direction.

[0044] Further, according to an exemplary embodiment of the present invention, a sealing member (not illustrated) may be provided at one end portion or both end portions of the wheel bearing 100 in the axial direction to prevent external foreign matter from flowing into a bearing space in which the rolling elements 400 are arranged or to prevent lubricant filled in the bearing space from leaking out of the bearing space.

[0045] According to an exemplary embodiment of the present invention, the plurality of inner rings (the first inner ring 310 and the second inner ring 320) can be coupled to each other in a state where their small-diameter-side end portions are in contact with each other. A clamp ring is fixed between the plurality of inner rings (the first inner ring 310 and the second inner ring 320), so that the plurality of inner rings (the first inner ring 310 and the second inner ring 320) are coupled to each other by the clamp ring.

[0046] With reference to Fig. 3 illustrates an example of a clamp ring 500 used according to the invention to couple the plurality of inner rings (the first inner ring 310 and the second inner ring 320) in the wheel bearing 100.

[0047] As illustrated in the drawing, the clamp ring 500 includes a frame 510 forming a body and a sealing portion 520 attached to the frame 510.

[0048] That is, the clamp ring 500 of the wheel bearing 100 according to an exemplary embodiment of the present invention may be formed in a structure in which an elastic seal portion is formed integrally with the frame.

[0049] According to an exemplary embodiment of the present invention, as illustrated in the drawings, the clamp ring 500 may be coupled to an outer peripheral surface of the inner ring 300.

[0050] According to an exemplary embodiment of the present invention, the frame 510 of the clamp ring 500 may be formed as a whole in a structure extending in the axial direction.

[0051] According to the present invention, the frame 510 of the clamp ring 500 includes an axial extension portion extending along the axial direction.

[0052] According to the present invention, the frame 510 of the clamp ring 500 includes a first axial extension portion 514 extending to one side in the axial direction and a second axial extension portion 516 extending to the other side in the axial direction.

[0053] According to an exemplary embodiment of the present invention, the clamp ring 500 may be configured such that the axial extension portion (the first axial extension portion 514 and the second axial extension portion 516) of the frame 510 is mounted to face the inner ring 300, and the plurality of inner rings (the first inner ring 310 and the second inner ring 320) are coupled to each other due to a radial elastic force exerted by the clamp ring 500.

[0054] According to the present invention, a central portion 512 extending in the radial direction is provided between the first axial extension portion 514 and the second axial extension portion 516.

[0055] According to the present invention, as illustrated in the drawing, the central portion 512 of the frame 510 is formed in a folded structure in which radially extending portions are folded. The central portion 512 is fitted into and coupled to receiving grooves provided at end portions of the inner ring 300 (for example, a first receiving groove 312 provided at the end portion of the first inner ring 310 and a second receiving groove 322 provided at the end portion of the second inner ring 320).

[0056] According to an exemplary embodiment of the present invention, the sealing portion 520 of the clamp ring 500 may be formed of an elastic material, such as rubber, and may be formed in a structure that encloses at least a portion of the frame 510.

[0057] According to an exemplary embodiment of the present invention, the sealing portion 520 of the clamp ring 500 may be configured to at least partially enclose the axial extension portions (the first axial extension portion 514 and the second axial extension portion 516) of the frame 510.

[0058] According to an exemplary embodiment of the present invention, the sealing portion 520 of the clamp ring 500 may be provided on the inner ring side (a surface facing the inner ring) in the axial extension portions (the first axial extension portion 514 and the second axial extension portion 516) of the frame 510.

[0059] That is, according to an exemplary embodiment of the present invention, as illustrated in the drawing, the sealing portion 520 of the clamp ring 500 may be disposed between the frame 510 and the inner ring 300 (for example, between the axial extension portions of the frame 510 and the inner ring 300).

[0060] According to an exemplary embodiment of the present invention, the sealing portion 520 of the clamp ring 500 may include an overmolded portion 522 that encloses an end portion of the frame 510 (e.g., an end portion of the axial extension portion).

[0061] According to an exemplary embodiment of the present invention, the frame 510 of the clamp ring 500 may be formed in a structure in which the end portion (for example, the end portion of the axial extension portion) is bent in the radial direction. The overmolded portion 522 may be configured to completely enclose the bent end portion of the frame 510.

[0062] As described above, the wheel bearing 100 according to an exemplary embodiment of the present invention is configured such that the seal portion 520 is integrally formed with the clamp ring 500 that couples the plurality of inner rings (the first inner ring 310 and the second inner ring 320). This makes it possible to perform both a function of fixing the plurality of inner rings and a sealing function. Thus, even if a separate seal member (center seal) is not provided, it is possible to seal a location where the plurality of inner rings are coupled to each other, making it possible to prevent oil in a vehicle shaft and a bearing lubricant from mixing with each other.

[0063] Next, with reference to Fig. 4 illustrates, by way of example, a clamp ring 600 of a wheel bearing 100 according to another exemplary embodiment of the present invention.

[0064] The Fig. 4 may be formed in a structure similar to that shown in Fig. 3, except that a sealing portion 620 provided in the clamp ring 600 is provided on a surface of a frame 610 opposite the inner ring, unlike the sealing portion 520 of the clamp ring 500 shown in Fig. 3 illustrated clamp ring 500.

[0065] That is, the Fig. The clamp ring 600 illustrated in Figure 4 may include the frame 610 forming a body and a sealing portion 620 fixed to the frame 610. The frame 610 may include a central portion 612 extending in the radial direction, a first axial extension portion 614 extending in the axial direction on one side, a second axial extension portion 616 extending in the axial direction on the other side, and the like. The sealing portion 620 may be provided on the surface of the frame 610 opposite the inner ring, and an overmolded portion 622 may be provided at an end portion of the sealing portion 620 to enclose an end portion of the frame 610.

[0066] Next, with reference to Fig. 5 illustrates an exemplary clamp ring 700 of the wheel bearing 100 according to yet another exemplary embodiment of the present invention.

[0067] The Fig. 5 includes a frame 710 forming a body and a sealing portion 720 secured to the frame 710, such as the one shown in Fig. 3 illustrated clamp ring 500 and the one in Fig. 4 illustrated clamp ring 600.

[0068] According to the present invention, the frame 710 of the clamp ring 700 includes a central portion 712 and a bent portion 714 formed to be bent from both ends of the central portion 712.

[0069] According to an exemplary embodiment of the present invention, the frame 710 of the clamp ring 700 can be inserted into and locked with the receiving grooves of the inner ring 300 (the receiving groove 312 provided in the first inner ring 310 and the receiving groove 322 provided in the second inner ring 320) in which the bent portion 714 is provided.

[0070] According to an exemplary embodiment of the present invention, the frame 710 of the clamp ring 700 may be formed in an inclined structure in which a width gradually decreases toward an end of the bent portion 714 to further facilitate the locking described above.

[0071] According to the present invention, the sealing portion 720 of the clamp ring 700 includes a base portion 730 configured to be attached to the frame 710 and a sealing lip 740 configured to extend from the base portion 730.

[0072] According to the present invention, the sealing lip 740 of the sealing portion 720 of the clamp ring 700 is configured as a contact-type sealing lip that comes into contact with one side of the inner ring to perform sealing.

[0073] For example, as illustrated in the drawing, the sealing lip 740 may be brought into contact with one side of the receiving grooves of the inner ring (the receiving groove 312 of the first inner ring 310 and the receiving groove 322 of the second inner ring 320) to perform sealing.

[0074] According to an exemplary embodiment of the present invention, a retaining spring 750 may be coupled to the sealing lip 740 to improve the contact of the sealing lip 740 with the inner ring and a sealing property of the sealing lip 740.

[0075] Although the present invention has been described above with reference to specific elements such as detailed component elements, as well as the limited embodiments and the drawings, they are provided merely to facilitate a more general understanding of the present invention, and the present invention is not limited to the above exemplary embodiments. Various modifications and alterations may be realized by those skilled in the art to which the present invention pertains from the above description.

[0076] Therefore, the present invention need not be limited to the exemplary embodiments described above. REFERENCE SYMBOL 100 wheel bearings 200 outer ring 210 first outer ring 220 second outer ring 300 inner ring 310 first inner ring 320 second inner ring 400 rolling elements 410 first row of rolling elements 420 second row of rolling elements 500 clamp ring (first example) 510 frame 520 Sealing section 600 clamp ring (second embodiment) 610 frames 620 Sealing section 700 clamp ring (third embodiment) 710 frames 720 Sealing section 730 base section 740 sealing lip 750 retaining spring

Claims

[1] Wheel bearing (100) for supporting a wheel of a vehicle so that the wheel can be rotatably mounted on a vehicle body, the wheel bearing (100) comprising: one or more outer rings (200, 210, 220) configured to support a plurality of rows of rolling elements in a radially outward direction; a plurality of inner rings (300, 310, 320) configured to support the plurality of rows of rolling elements in a radially inward direction; the plurality of rows of rolling elements disposed between the one or more outer rings (200, 210, 220) and the plurality of inner rings (300, 310, 320) to support relative rotation between the one or more outer rings and the plurality of inner rings (300, 310, 320); and a clamp ring (500, 600) coupled between the plurality of inner rings (300, 310, 320) to couple the plurality of inner rings (300, 310, 320) together, the clamp ring (500, 600) including a frame (510, 610) and a sealing portion (520, 620) attached to the frame (510, 610), wherein the frame (510, 610) of the clamp ring (500, 600) comprises: a first axial extension portion (514, 614) extending in an axial direction; a second axial extension portion (516, 616) extending in the other axial direction; and a central portion (512, 612) located between the first axial extension portion (514, 614) and the second axial extension portion (516, 616) to extend in a radial direction, wherein the central portion (512, 612) of the clamp ring (500, 600) is inserted into and coupled to receiving grooves (312, 322) provided at end portions of the plurality of inner rings (300, 310, 320), and wherein the central portion (512, 612) of the clamp ring (500, 600) is formed in a folded structure. [2] The wheel bearing (100) according to claim 1, wherein the sealing portion (520) of the clamp ring (500) is provided on a surface facing the plurality of inner rings (300, 310, 320) on the axial extension portion (514, 516) of the frame (510) of the clamp ring (500). [3] Wheel bearing (100) according to one of the preceding claims, wherein the sealing portion (520) of the clamp ring (500) is provided between the frame (510) of the clamp ring (500) and the plurality of inner rings (300, 310, 320). [4] Wheel bearing (100) according to one of claims 2 to 3, wherein the sealing portion (520) of the clamp ring (500) includes an overmolded portion (522) enclosing an end portion of the frame (510) of the clamp ring (500). [5] Wheel bearing (100) according to one of the preceding claims, wherein the sealing portion (620) of the clamp ring (600) is provided on a surface opposite the plurality of inner rings (300, 310, 320) on the frame (610) of the clamp ring (600). [6] The wheel bearing (100) of claim 5, wherein the sealing portion (620) of the clamp ring (600) includes an overmolded portion (622) enclosing an end portion of the frame (610) of the clamp ring (600). [7] Wheel bearing (100) for supporting a wheel of a vehicle so that the wheel can be rotatably mounted on a vehicle body, the wheel bearing (100) comprising: one or more outer rings (200, 210, 220) configured to support a plurality of rows of rolling elements in a radially outward direction; a plurality of inner rings (300, 310, 320) configured to support the plurality of rows of rolling elements in a radially inward direction; the plurality of rows of rolling elements disposed between the one or more outer rings (200, 210, 220) and the plurality of inner rings (300, 310, 320) to support relative rotation between the one or more outer rings and the plurality of inner rings (300, 310, 320); and a clamp ring (700) coupled between the plurality of inner rings (300, 310, 320) to couple the plurality of inner rings (300, 310, 320) together, the clamp ring (700) including a frame (710) and a sealing portion (720) attached to the frame (710), wherein the frame (710) of the clamp ring (700) includes a central portion (712) and a bent portion (714) formed to be bent from both ends of the central portion (712), and the bent portion (714) is received in and coupled to receiving grooves (312, 322), the receiving grooves (312, 322) being provided on the plurality of inner rings (300, 310, 320), wherein the sealing portion (720) of the clamp ring (700) includes a base portion (730) attached to an outer side of the frame (710) of the clamp ring (700) and a sealing lip (740) formed to extend from the base portion (730), and wherein the sealing lip (740) of the sealing portion (720) of the clamp ring (700) is configured as a contact-type sealing lip that is in contact with an outer side of the inner ring (300, 310, 320). [8] Wheel bearing (100) according to claim 7, wherein the bent portion (714) of the frame (710) of the clamp ring (700) is locked with the receiving grooves (312, 322) provided on the plurality of inner rings (300, 310, 320). [9] The wheel bearing (100) according to any one of claims 7 to 8, wherein the bent portion (714) of the frame (710) of the clamp ring (700) is formed in an inclined structure in which a width gradually decreases toward an end of the bent portion (714). [10] Wheel bearing (100) according to one of the preceding claims, wherein the clamp ring (500, 600, 700) is configured to be coupled to outer peripheral surfaces of the plurality of inner rings (300, 310, 320).

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