Wheel bearing for part-time four-wheel drive vehicle

Abstract

According to one embodiment of the present invention, provided is a wheel bearing for a part-time four-wheel drive vehicle which can switch between a two-wheel drive mode and a four-wheel drive mode. A wheel bearing for a part-time four-wheel drive vehicle according to one embodiment of the present invention may comprise: a wheel hub on which a wheel of a vehicle is mounted and which rotates together with the wheel of the vehicle; one or more inner rings mounted on the wheel hub; an outer ring mounted and fixed to a vehicle body-side member; a plurality of rolling elements for supporting the wheel hub and the inner rings so as to be rotatable relative to the outer ring; and a coupler mounted on the wheel hub. According to one embodiment of the present invention, the inner rings and the coupler may be configured to be fixed by a forming portion formed by plastically deforming an inner axial end portion of the wheel hub radially outward. According to one embodiment of the present invention, clip rings may be provided between the coupler and the forming portion of the wheel hub, and the coupler may be configured to have recesses having recessed structures and provided at radially inner and axially inner end portions so that the clip rings are coupled by being accommodated in the recesses.

Description

Wheel bearings for part-time four-wheel drive vehicles

[0001] The present invention relates to a wheel bearing for a vehicle that supports a wheel of the vehicle by rotatably mounting it on a vehicle body, and more specifically, to a wheel bearing for a part-time four-wheel drive vehicle that can switch between a two-wheel drive mode and a four-wheel drive mode.

[0002] Referring to FIG. 1, a wheel bearing (10) for a part-time four-wheel drive vehicle is illustrated as an example, configured to be switchable between two-wheel drive mode and four-wheel drive mode by selectively connecting and disconnecting the drive shaft and wheel bearing.

[0003] A wheel bearing (10) for a part-time four-wheel drive vehicle may be configured, similarly to a conventional wheel bearing, to support a wheel of a vehicle by connecting a rotating element [e.g., a wheel hub (20) and an inner ring (30)] on which a wheel is mounted to a non-rotating element [e.g., an outer ring (40)] fixed to a vehicle body through a plurality of rolling elements (50) so as to be rotatably mounted on the vehicle body.

[0004] In addition, a coupler (60) having a spline formed thereon may be coupled to the body-side end of the wheel hub (20), so that the drive shaft can be selectively connected or disconnected from the wheel bearing through the coupler (60).

[0005] Specifically, when the clutch member (70) that rotates synchronously with the drive shaft [e.g., constant velocity joint (80)] moves axially outward and the spline formed on the inner surface of the clutch member (70) engages with the spline formed on the outer surface of the coupler (60), the wheel bearing is connected to the drive shaft and receives power, and when the clutch member (70) moves axially inward and the spline formed on the inner surface of the clutch member (70) disengages from the spline formed on the outer surface of the coupler (60), the power transmission between the wheel bearing and the drive shaft is released.

[0006] However, the wheel bearing (10) for a part-time four-wheel drive vehicle illustrated in FIG. 1 is configured to fix the inner ring (30) and the coupler (60) in a preloaded state by plastically deforming the body-side end of the wheel hub (20). In the case of this structure, there is a risk that cracks or damage may occur in the splines of the wheel hub (20) and the coupler (60) during the process of plastically deforming the body-side end of the wheel hub (20) radially outward to form the forming portion (22).

[0007] As a measure to prevent such problems, a method of forming a forming part (22) by interposing a clipping ring between the forming part (22) of the wheel hub (20) and the coupler (60) may be considered, but in this case, the position of the clipping ring may change unintentionally during the process of forming the forming part (22) through the plastic deformation process, which may cause incomplete forming of the forming part (22), unstable bonding between the wheel hub (20) and the coupler (60), or problems such as cracks occurring in the wheel hub (20) or the coupler (60) may occur.

[0008] The present invention is intended to solve the conventional problems described above, and provides a wheel bearing for a part-time four-wheel drive vehicle capable of switching between a two-wheel drive mode and a four-wheel drive mode, in which a recess having a sunken structure is formed in the axial and radial inner edge portions of a coupler so that a clip ring can be inserted and maintained within the recess.

[0009] A representative configuration of the present invention to achieve the aforementioned purpose is as follows.

[0010] According to one embodiment of the present invention, a wheel bearing for a part-time four-wheel drive vehicle capable of switching between a two-wheel drive mode and a four-wheel drive mode is provided. The wheel bearing for a part-time four-wheel drive vehicle according to one embodiment of the present invention may include: a wheel hub on which a wheel of the vehicle is mounted and which rotates together with the wheel of the vehicle; one or more inner rings mounted on the wheel hub; an outer ring mounted and fixed to a body-side member; a plurality of rolling elements supporting the wheel hub and the inner ring so as to be rotatable relative to the outer ring; and a coupler mounted on the wheel hub. According to one embodiment of the present invention, the inner ring and the coupler may be configured to be fixed by a forming portion formed by plastically deforming an inner axial end of the wheel hub in a radially outward direction. According to one embodiment of the present invention, a clip ring may be provided between the coupler and the forming portion of the wheel hub, and the coupler may be configured to have a recess having a sunken structure at a radially inward direction and an axially inward direction, such that the clip ring is received and coupled within the recess.

[0011] According to one embodiment of the present invention, the coupler may be configured to have an outer peripheral spline extending axially on an outer peripheral surface, such that switching between a two-wheel drive mode and a four-wheel drive mode is performed by connecting and disconnecting an engagement spline of a clutch member to the outer peripheral spline.

[0012] According to one embodiment of the present invention, the coupler may be configured to have an inner peripheral spline extending axially on an inner peripheral surface, such that the inner peripheral spline is spline-coupled to a wheel hub.

[0013] According to one embodiment of the present invention, the coupler may have a protrusion extending radially inwardly from an axially inner end portion of the recess.

[0014] According to one embodiment of the present invention, the clip ring can be formed as a ring member having a circular cross-sectional shape.

[0015] According to one embodiment of the present invention, the recess of the coupler may be formed as a recessed portion having a cross-sectional arc shape having a curvature corresponding to the shape of the clip ring.

[0016] According to one embodiment of the present invention, the axially inner end of the clipping ring can be configured to be positioned axially inner compared to the coupler.

[0017] According to one embodiment of the present invention, the length by which the axial inner end of the clipping protrudes axially inwardly compared to the coupler may be configured to be 0.4 mm or less.

[0018] According to one embodiment of the present invention, the center of the cross-sectional arc shape of the recess of the coupler may be located radially inward compared to the inner circumferential surface of the coupler.

[0019] According to one embodiment of the present invention, the recess of the coupler can be formed by turning.

[0020] According to one embodiment of the present invention, a wheel hub may have an inner ring mounting portion and a coupler mounting portion on an outer surface thereof, the inner ring mounting portion may have a cylindrical press-fit portion so that the inner ring may be press-fitted into the cylindrical press-fit portion and mounted therein, and the coupler mounting portion may have a spline joint portion extending in an axial direction so that an inner peripheral spline of the coupler may be spline-coupled to the spline joint portion.

[0021] According to one embodiment of the present invention, the outer diameter of the spline joint provided in the coupler mounting portion can be formed to be smaller than the cylindrical press-fit portion of the inner ring mounting portion.

[0022] According to one embodiment of the present invention, the coupler mounting portion may further include a cylindrical portion on the axial inner side of the spline coupling portion.

[0023] According to one embodiment of the present invention, the cylindrical portion of the coupler mounting portion can be formed to have a smaller diameter than the spline joint portion.

[0024] According to one embodiment of the present invention, the clip ring can be mounted between the recess of the coupler and the cylindrical portion of the coupler mounting portion.

[0025] In addition, the vehicle wheel bearing according to the present invention may further include other additional components within a range that does not impair the technical idea of ​​the present invention.

[0026] According to one embodiment of the present invention, a vehicle wheel bearing is provided with a recessed structure in the axial and radial inner edge portions of a coupler so that a clip ring can be inserted and positioned within the recess, and thus, when a body-side end of a wheel hub is plastically deformed to form a forming portion, the clip ring is stably maintained in position, thereby preventing damage such as notches or cracks from occurring during the forming process or incomplete forming from occurring.

[0027] Figure 1 illustrates an example of a wheel bearing for a part-time four-wheel drive vehicle.

[0028] Figure 2 illustrates an example of a vehicle wheel bearing according to one embodiment of the present invention.

[0029] FIG. 3 illustrates an example of a cross-sectional structure of a vehicle wheel bearing according to one embodiment of the present invention.

[0030] FIG. 4 exemplarily illustrates the structure of an axial inner end portion of a vehicle wheel bearing according to one embodiment of the present invention.

[0031] FIG. 5 exemplarily illustrates the structure of a coupler that can be applied to a vehicle wheel bearing according to one embodiment of the present invention.

[0032] <Explanation of symbols>

[0033] 100: Wheel bearings for vehicles

[0034] 200: Wheel hub

[0035] 210: Wheel mounting flange

[0036] 220: Forming Department

[0037] 230: Inner ring mounting part

[0038] 240: Coupler mounting part

[0039] 242: Spline joint

[0040] 300: Inner ring

[0041] 400: Outer ring

[0042] 410: Body side mounting flange

[0043] 500: Electric body

[0044] 600: Coupler

[0045] 610: Spline if given

[0046] 620: Outer circumference spline

[0047] 630: Recess

[0048] 632: Protrusion

[0049] 700: Clipping

[0050] The embodiments described below are provided for the purpose of explaining the technical idea of ​​the present invention, and the scope of the present invention is not limited to the embodiments presented below or the specific description thereof.

[0051] All technical and scientific terms used in this specification have the meaning commonly understood by a person of ordinary skill in the art to which the present invention pertains unless otherwise defined, and all terms used in this specification have been selected for the purpose of more clearly explaining the present invention and have not been selected to limit the scope of the rights of the present invention.

[0052] As used herein, expressions such as “including,” “comprising,” “having,” etc. should be understood as open-ended terms implying the possibility of including other embodiments, unless otherwise stated in the phrase or sentence in which the expression is included.

[0053] In this specification, “axial” means a direction extending along the rotational center axis of the wheel bearing (“axially inward” means a direction toward the body side, and “axially outward” means a direction toward the wheel side), “radially” means a direction away from or closer to the rotational center axis perpendicular to the “axial direction,” and “circumferential” means a rotational direction centered on the aforementioned “axial direction.”

[0054] Where a component is described herein as extending axially or radially, it should be understood that this may include extending not only parallel to the axial or radial direction, but also obliquely to the axial or radial direction, unless otherwise stated in the phrase or sentence containing the expression.

[0055] The singular forms used in this specification may include plural meanings unless otherwise stated, and the same applies to the singular forms used in the claims.

[0056] When a component is referred to herein as being “positioned” or “formed” on one side of another component, it should be understood that the component is positioned or formed in direct contact with one side of the other component, or may be positioned or formed with another new component interposed therebetween.

[0057] Hereinafter, with reference to the attached drawings, preferred embodiments of the present invention will be described in detail to a degree that those skilled in the art can easily practice the present invention. In the attached drawings, identical or corresponding components are indicated by the same reference numerals, and in the description of the embodiments below, redundant description of identical or corresponding components may be omitted. However, even if a description of a specific component is omitted in the description below, this is not intended to mean that such component is not included in the corresponding embodiment.

[0058] Referring to FIGS. 2 to 5, a vehicle wheel bearing (100) according to one embodiment of the present invention is exemplarily illustrated. As illustrated in the drawings, the vehicle wheel bearing (100) according to one embodiment of the present invention may be configured as a part-time four-wheel drive vehicle wheel bearing capable of switching between a two-wheel drive mode and a four-wheel drive mode.

[0059] According to one embodiment of the present invention, a wheel bearing (100) for a vehicle may be configured to include a wheel hub (200) on which a wheel of the vehicle is mounted and which rotates together with the wheel of the vehicle; an inner ring (300) mounted on the wheel hub (200); an outer ring (400) mounted and fixed to a body-side member; and a plurality of rolling elements (500) which support the wheel hub (200) and the inner ring (300) so as to be able to rotate relative to the outer ring (400).

[0060] According to one embodiment of the present invention, the wheel hub (200) may be formed in a substantially cylindrical structure extending along the axial direction, and a wheel mounting flange (210; hub flange) may be provided on one outer peripheral surface of the wheel hub (200). The wheel mounting flange (210) may be formed in a shape extending radially outward from the outer peripheral surface of the wheel hub (200) and may be used to mount a wheel of a vehicle to the wheel hub (200) using a hub bolt or the like. Meanwhile, an inner ring (300) and a coupler (600) may be configured to be coupled to the body-side end of the wheel hub (200), and the inner ring (300) and the coupler (600) may be configured to be fixed on the wheel hub (200) in a state where a predetermined preload is applied by a forming portion (220) formed by plastically deforming the body-side end of the wheel hub (200) radially outward.

[0061] According to one embodiment of the present invention, one or more inner rings (300) may be configured to be mounted on the outer surface of the wheel hub (200), and a raceway surface (inner raceway surface) of a rolling element may be formed on the outer surface of the inner ring (300) to support the rolling element (500) from the radially inner side. For example, the inner ring (300) may be configured to be press-fitted and mounted on an inner ring mounting portion (230) provided near the body-side end of the wheel hub (200).

[0062] According to one embodiment of the present invention, the outer ring (400) may be configured to have a body-side mounting flange (410) on the outer circumference thereof, which is used to mount the wheel bearing (100) on a body-side member (e.g., a knuckle), and to have a raceway surface on the inner circumference thereof, with which the rolling element (500) comes into contact. The raceway surface (outer raceway surface) formed on the inner circumference of the outer ring (400) may be configured to cooperate with the raceway surface (inner raceway surface) formed on the wheel hub (200) and / or the inner ring (300) to accommodate and support the rolling element (500), which is a rolling element, between these raceway surfaces.

[0063] According to one embodiment of the present invention, the electric body (500) is interposed between a rotating element of a wheel bearing (100) [e.g., wheel hub (200) and / or inner ring (300)] and a non-rotating element [e.g., outer ring (400)], and can perform a function of supporting the rotating element of the wheel bearing (100) so as to be able to rotate relative to the non-rotating element.

[0064] However, the above-described configurations of the vehicle wheel bearing (100) according to one embodiment of the present invention are not limited to the structure shown in the drawing, and may be modified and formed into various structures applicable to the vehicle wheel bearing.

[0065] For example, in the case of the embodiment shown in the drawing, the vehicle wheel bearing (100) is configured in a form in which one side of the track surface for supporting the rolling element is directly formed on a part of the outer surface of the wheel hub (200), but the vehicle wheel bearing (100) according to one embodiment of the present invention may be implemented by modifying it into another structure, such as by mounting two inner rings (300) on the wheel hub (200) to support the rolling element (500) through the two inner rings (300).

[0066] In addition, in the case of the embodiment shown in the drawing, the rolling element (500) that rotatably supports the rotating element of the wheel bearing (100) [e.g., wheel hub (200) and / or inner ring (200)] relative to the non-rotating element [e.g., outer ring (400)] is formed in the shape of a tapered roller, but the rolling element (500) may be formed as a cloud element of another shape, such as a spherical ball.

[0067] According to one embodiment of the present invention, a coupler (600) is provided at an axial inner end portion of a wheel hub (200), and the coupler (600) can be configured to perform switching between a two-wheel drive mode in which power transmission between a wheel bearing and a drive shaft is blocked and a four-wheel drive mode in which power transmission between the wheel bearing and the drive shaft is possible.

[0068] According to one embodiment of the present invention, the coupler (600) may be formed into a roughly ring-shaped structure with a central portion as illustrated in FIG. 5, and may be configured to be mounted on the wheel hub (200) at an axially inner position compared to the inner ring (300).

[0069] According to one embodiment of the present invention, the wheel hub (200) may be configured to have an inner ring mounting portion (230) and a coupler mounting portion (240) on the outer surface thereof, such that the inner ring (300) is mounted on the inner ring mounting portion (230) provided on the wheel hub (200), and the coupler (600) is mounted on the coupler mounting portion (240) provided on the wheel hub (200).

[0070] According to one embodiment of the present invention, the inner ring mounting portion (230) of the wheel hub (200) may be configured to have a cylindrical press-fit portion, so that the inner ring (300) is press-fitted into and mounted on the cylindrical press-fit portion.

[0071] According to one embodiment of the present invention, the coupler mounting portion (240) of the wheel hub (200) may be configured to have a spline coupling portion (242) extending in the axial direction, so that the coupler (600) is coupled to the wheel hub (200) through the spline coupling portion (242).

[0072] Specifically, the coupler (600) may have an inner peripheral spline (610) extending axially on the inner peripheral surface, and the inner peripheral spline (610) of the coupler (600) may be configured to be spline-coupled to a spline coupling portion (242) provided in the coupler mounting portion (240) of the wheel hub (200).

[0073] According to one embodiment of the present invention, the coupler mounting portion (240) may be configured to be positioned axially inward compared to the inner ring mounting portion (230), and the outer diameter of the spline coupling portion (242) provided in the coupler mounting portion (240) may be formed to have a smaller diameter than the cylindrical press-fit portion of the inner ring mounting portion (230).

[0074] According to one embodiment of the present invention, the coupler (600) may be configured to have an outer peripheral spline (620) extending axially on the outer peripheral surface, such that switching between a two-wheel drive mode and a four-wheel drive mode is performed through the outer peripheral spline (620).

[0075] According to one embodiment of the present invention, switching between two-wheel drive mode and four-wheel drive mode through the outer peripheral spline (620) of the coupler (600) can be implemented substantially identically to a wheel bearing for a conventional part-time four-wheel drive vehicle.

[0076] For example, the outer peripheral spline (620) of the coupler (600) can selectively engage with the engagement spline of a clutch member that rotates synchronously with the drive shaft (e.g., constant velocity joint) similar to the wheel bearing for a conventional part-time four-wheel drive vehicle illustrated in FIG. 1, thereby performing a function of transmitting or blocking power from the drive shaft.

[0077] According to one embodiment of the present invention, the inner ring (300) and coupler (600) mounted on the wheel hub (200) can be configured to be fixed by a forming portion (220) formed by plastically deforming the axial inner end (220a) of the wheel hub (200) in a radial outer direction.

[0078] According to one embodiment of the present invention, a clip ring (700) may be provided between the coupler (600) and the forming part (220) of the wheel hub (200).

[0079] According to one embodiment of the present invention, the clip ring (700) can be formed as a ring member having a circular cross-sectional shape.

[0080] According to one embodiment of the present invention, the clip ring (700) may be formed as a ring member having a roughly C shape with a portion of the circumference cut off.

[0081] According to one embodiment of the present invention, the coupler (600) may be configured to have a recess (630) having a sunken structure at the radially inner and axially inner edge portions, so that a clip ring (700) is inserted and received within the recess (630).

[0082] According to one embodiment of the present invention, the recess (630) may be formed in a shape corresponding to the clip ring (700). For example, the recess (630) may be formed as a recessed portion having a cross-sectional arc shape having a curvature corresponding to the shape of the clip ring (700).

[0083] In this way, the vehicle wheel bearing (100) according to one embodiment of the present invention is configured such that a clip ring (700) is interposed between the coupler (600) and the forming portion (220) of the wheel hub (200), thereby preventing damage to the wheel hub (200) and / or the coupler (600) when the forming portion (220) is formed by plastically deforming the axial inner end of the wheel hub (200).

[0084] Furthermore, since the vehicle wheel bearing (100) according to one embodiment of the present invention is configured to form a recess (630) in the radially inner and axially inner edge portions of the coupler (600) to accommodate the clip ring (700), the clip ring (700) can be stably maintained in position during the process of forming the forming portion (220) in the axially inner end portion of the wheel hub (200), thereby enabling stable forming of the forming portion (220).

[0085] According to one embodiment of the present invention, the recess (630) of the coupler (600) may be configured to be formed through a machining process such as turning.

[0086] According to one embodiment of the present invention, the clip ring (700) may be configured such that its axial inner end protrudes axially inward by a predetermined distance (d) compared to the coupler (600).

[0087] According to one embodiment of the present invention, for a stable plastic deformation process of the forming portion (220), it may be desirable for the distance (d) at which the clip ring (700) protrudes axially compared to the coupler (600) to be formed to be 0.4 mm or less.

[0088] According to one embodiment of the present invention, the center of the cross-sectional arc shape of the recess (630) of the coupler (600) may be configured to be located radially inward compared to the inner circumferential surface of the coupler (600).

[0089] According to one embodiment of the present invention, the coupler (600) may be configured to have a protrusion (632) extending radially inwardly from an axially inner end portion of the recess (630) to prevent the clip ring (700) accommodated in the recess (630) from being detached.

[0090] According to one embodiment of the present invention, the coupler mounting portion (240) of the wheel hub (200) may be configured to have a cylindrical portion (244) on the axial inner side of the spline coupling portion (242), so that a clip ring (700) is mounted on the cylindrical portion (244).

[0091] According to one embodiment of the present invention, the cylindrical portion (244) of the coupler mounting portion (240) of the wheel hub (200) may be formed to have a smaller diameter than the spline coupling portion (242), and the clip ring (700) may be configured to be mounted between the recess (630) of the coupler (600) and the cylindrical portion (244) of the coupler mounting portion (240).

[0092] Although the present invention has been described above with specific details such as specific components and limited examples, the above examples are provided only to help a more general understanding of the present invention, and the present invention is not limited thereto, and those with ordinary knowledge in the technical field to which the present invention pertains can make various modifications and variations based on this description.

[0093] Therefore, the idea of ​​the present invention should not be limited to the embodiments described above, and all things that are modified equally or equivalently to the claims described below as well as the claims are considered to fall within the scope of the idea of ​​the present invention.

Claims

1. A wheel bearing (100) for a part-time 4-wheel drive vehicle capable of switching between 2-wheel drive mode and 4-wheel drive mode. A wheel hub (200) on which a vehicle wheel is mounted and which rotates together with the vehicle wheel; One or more inner rings (300) mounted on the wheel hub (200); An outer ring (400) mounted and fixed to a body-side member; A plurality of electric motors (500) that support the wheel hub (200) and the inner ring (300) so as to be able to rotate relative to the outer ring (400); Includes a coupler (600) mounted on the above wheel hub (200), The inner ring (300) and the coupler (600) are configured to be fixed by a forming portion (220) formed by plastically deforming the inner axial end of the wheel hub (200) in a radial outward direction. A clip ring (700) is provided between the coupler (600) and the forming part (220) of the wheel hub (200). The above coupler (600) is configured to have a recess (630) with a sunken structure at the radially inner and axially inner ends, so that the clip ring (700) is received and coupled within the recess (630). Wheel bearings for vehicles.

2. In paragraph 1, The above coupler (600) is configured to have an outer peripheral spline (620) extending axially on the outer peripheral surface, so that switching between a two-wheel drive mode and a four-wheel drive mode is performed as the engagement spline of the clutch member is connected and disconnected to the outer peripheral spline (620). Wheel bearings for vehicles.

3. In paragraph 2, The above coupler (600) is provided with an inner peripheral spline (610) extending axially on the inner peripheral surface, and is configured such that the inner peripheral spline (610) is spline-coupled to the wheel hub (200). Wheel bearings for vehicles.

4. In paragraph 3, The above coupler (600) has a protrusion (632) extending radially inwardly from the axial inner end portion of the above recess (630). Wheel bearings for vehicles.

5. In paragraph 4, The above clip ring (700) is formed as a ring member having a circular cross-sectional shape. Wheel bearings for vehicles.

6. In paragraph 5, The recess (630) of the above coupler (600) is formed as a recessed portion having a cross-sectional arc shape with a curvature corresponding to the shape of the above clip ring (700). Wheel bearings for vehicles.

7. In paragraph 6, The axial inner end of the above clip ring (700) is configured to be positioned axially inner compared to the above coupler (600). Wheel bearings for vehicles.

8. In paragraph 7, The length (d) of the axial inner end of the above clip ring (700) protruding axially inwardly compared to the above coupler (600) is configured to be 0.4 mm or less. Wheel bearings for vehicles.

9. In paragraph 8, The center of the cross-sectional arc shape of the recess (630) of the above coupler (600) is located radially inward compared to the inner surface of the above coupler (600). Wheel bearings for vehicles.

10. In paragraph 9, The recess (630) of the above coupler (600) is formed by turning. Wheel bearings for vehicles.

11. In paragraph 7, The above wheel hub (200) has an inner wheel mounting portion (230) and a coupler mounting portion (240) on the outer surface, The inner ring mounting portion (230) is configured to have a cylindrical press-fit portion, and the inner ring (300) is mounted by being press-fitted into the cylindrical press-fit portion. The above coupler mounting portion (240) is provided with a spline coupling portion (242) extending in the axial direction, and is configured such that the inner peripheral spline (610) of the coupler (600) is spline-coupled to the spline coupling portion (242). Wheel bearings for vehicles.

12. In paragraph 11, The outer diameter of the spline joint (242) provided in the above coupler mounting portion (240) is formed to be smaller than the cylindrical press-fit portion of the above inner ring mounting portion (230). Wheel bearings for vehicles.

13. In paragraph 12, The above coupler mounting portion (240) further includes a cylindrical portion (244) on the axial inner side of the spline coupling portion (242). Wheel bearings for vehicles.

14. In paragraph 13, The cylindrical portion (244) of the above coupler mounting portion (240) is formed to have a smaller diameter than the above spline joint portion (242). Wheel bearings for vehicles.

15. In paragraph 14, The above clip ring (700) is mounted between the recess (630) of the coupler (600) and the cylindrical portion (244) of the coupler mounting portion (240). Wheel bearings for vehicles.

Images