KR20210127575A - Wheel bearing having improved sealing structure - Google Patents

Abstract

Provided is a wheel bearing connecting an inner member and an outer member using a rolling element to be relatively rotatable. According to one embodiment of the present invention, a sealing member is provided to prevent leakage of inner lubricant or entrance of external foreign substances at the end part of the wheel bearing, and comprises: a frame forming a basic body structure; and an elastic sealing unit attached to the frame. In addition, an overmold unit is prepared to protrude radially outwards from an outer lateral unit of the sealing member in a radial direction and comprises an inclined unit, of which a diameter reduces as moving along an assembly direction of the wheel bearing, on a surface where the assembly direction is located. The wheel bearing reduces risk of damage on the sealing member during assembly and improves sealing and assembling performance.

Description

Wheel bearing with improved sealing structure {WHEEL BEARING HAVING IMPROVED SEALING STRUCTURE}

The present invention relates to a wheel bearing for rotatably mounting and supporting a wheel of a vehicle on a vehicle body. It relates to a configured wheel bearing.

A bearing is a component in a rotating device for rotatably mounting and supporting a rotating element on a non-rotating element, and a wheel bearing is used to rotatably mount and support a wheel of a vehicle on a vehicle body.

Referring to FIG. 1 , the structure of a wheel bearing for a vehicle is illustrated by way of example. As shown in FIG. 1 , the wheel bearing 10 is connected to the non-rotating element 30 fixed to the vehicle body through the rolling element 40 to which the rotating element 20 on which the wheel of the vehicle is mounted is fixed to the vehicle body. It is configured to rotatably support the wheel mounted on the vehicle body, and one or both ends of the wheel bearing 10 has a sealing member 50 for preventing the inflow of foreign substances or the leakage of lubricating oil (grease) inside. ) is configured to be provided.

On the other hand, the sealing member 50 used by being mounted on the wheel bearing 10 may be formed in a structure in which an elastic sealing part 70 is attached to the frame 60 forming the basic body as shown in FIG. , the sealing lip 72 provided in the elastic sealing part 70 is arranged to contact or adjacent to the counterpart member to perform sealing.

By the way, the wheel bearing 10 may be configured to be coupled to the vehicle body side member 90 by inserting the non-rotating element 30 into the vehicle body side member 90 along the axial direction as shown in FIG. 2 , In this case, there may be a problem in that the lubricating oil of the drive shaft (eg, axle oil) leaks into the space between the non-rotating element 30 of the wheel bearing 10 and the vehicle body side member 90 .

As a method to solve this problem, as shown in FIGS. 1 and 2 , a protruding sealing part 80 (overmold part) protruding outward in the radial direction is formed on one side of the sealing member 50 to prevent non-rotation of the wheel bearing. A method of improving the sealability between the element 30 and the body-side member 90 may be considered.

However, in the case of forming the sealing member 50 with this structure, the sealing member protrudes outward in the radial direction in the process of coupling the wheel bearing 10 on which the sealing member 50 is mounted to the vehicle body side member 90 ( 80 (overmold part) comes into contact with the vehicle body side member and is swept together, which may cause a tear in the elastic sealing part of the sealing member, thereby damaging the sealing member or reducing the sealing performance.

The present invention is to solve the above-mentioned problems in the prior art, by improving the sealing member and its mounting structure to reduce the risk of damage to the sealing member during the assembly process and to provide a wheel bearing configured to improve the sealing and assembling properties aim to do

A representative configuration of the present invention for achieving the above object is as follows.

According to an embodiment of the present invention, there is provided a wheel bearing in which an inner member and an outer member are connected to be relatively rotatable through a rolling element. According to an embodiment of the present invention, a sealing member may be provided at the end of the wheel bearing to prevent an external foreign substance from being introduced or an internal lubricating oil from leaking. According to an embodiment of the present invention, the sealing member may include a frame forming a basic body and an elastic sealing part attached to the frame. According to one embodiment of the present invention, the radially outer portion of the sealing member is provided with an overmolded portion protruding outward in the radial direction, and the overmolded portion is located on a surface positioned in the assembly direction of the wheel bearing and the diameter increases as it moves along the assembly direction. It may be configured to include a reduced slope.

According to an embodiment of the present invention, a plurality of inclined portions may be provided to be spaced apart along the axial direction.

According to an embodiment of the present invention, a plurality of inclined portions provided to be spaced apart along the axial direction may be formed in a stepped structure on the outer circumferential surface of the overmold portion.

According to an embodiment of the present invention, the plurality of inclined portions provided spaced apart along the axial direction of the inclined portion disposed closer to the vehicle body side member to which the wheel bearing is coupled has an outer circumferential surface of the inclined portion disposed more spaced apart from the vehicle body side member. It may be formed so as to be located radially inside the outer circumferential surface.

According to an embodiment of the present invention, the overmolded portion may be formed at the radially and axially outer ends of the frame to surround the end of the frame.

According to an embodiment of the present invention, the outer member of the wheel bearing includes a first outer circumferential surface on which a sealing member is mounted; The vehicle body-side member to which the wheel bearing is coupled includes: a first inner circumferential surface positioned at an axially outer end; a second inner circumferential surface spaced apart from the first inner circumferential surface in the axial direction and having a smaller diameter than the first inner circumferential surface; The wheel bearing may include an inclined surface positioned between the first inner circumferential surface and the second inner circumferential surface, and the wheel bearing may be configured such that the second outer circumferential surface of the outer member is inserted into the first inner circumferential surface of the vehicle body side member to be coupled thereto.

According to an embodiment of the present invention, the inclined portion of the overmolded portion may be configured to be mounted in contact with the inclined surface of the vehicle body side member.

According to an embodiment of the present invention, the frame includes a cylindrical press-fitted portion press-fitted to the outer member; a first radial extension extending radially inward from the cylindrical indentation, a first axial extension extending axially inward from the first radial extension portion, and radially inwardly extending from the first axial extension A second radial extension extending from the second radial extension, a second axial extension extending axially outwardly from the second radial extension, and a third radial extension extending radially inwardly from the second axial extension. can be configured to include.

According to an embodiment of the present invention, the first radial extension of the frame may be positioned opposite to the axial cross-section of the outer member to which the sealing member is press-fitted.

According to an embodiment of the present invention, an encoder used to measure the rotational speed of a wheel bearing is disposed in a space formed by the first axial extension, the second radial extension, and the second axial extension. can be configured.

According to an embodiment of the present invention, the elastic sealing portion of the sealing member may include a main sealing lip for sealing between the inner member of the wheel bearing.

According to an embodiment of the present invention, the main sealing lip may contact the outer peripheral surface of one side of the inner member to perform contact sealing.

According to an embodiment of the present invention, the main sealing lip is formed in a bent structure to extend radially inwardly and then radially outwardly, and the main sealing lip contacts the outer peripheral surface of the inner member from the inner peripheral surface of the bent part to perform sealing. and a garter spring may be fastened to an outer circumferential surface of the bent portion of the main sealing lip.

According to an embodiment of the present invention, the resilient sealing unit may further include an auxiliary sealing lip for sealing with the vehicle body side member.

According to an embodiment of the present invention, the auxiliary sealing lip may contact the axial end face of the vehicle body side member to perform contact sealing.

In addition to this, the wheel bearing according to the present invention may further include other additional components within a range that does not impair the technical spirit of the present invention.

The wheel bearing according to an embodiment of the present invention is configured to improve the sealing property between the wheel bearing and the vehicle body side member by providing an over-molded portion formed to protrude radially outward from the radially outer portion of the sealing member, This overmolded part is configured to have an inclined part structure in which the diameter decreases as it moves along the assembly direction of the wheel bearing on the surface facing the wheel bearing assembly direction (that is, the vehicle body side), so that the radius of the sealing member is provided. Even if the overmolded portion protruding outward in the direction is provided, it is possible to reduce the risk of damage to the sealing member in the process of assembling the wheel bearing to the body-side member.

In addition, the wheel bearing according to an embodiment of the present invention may be coupled to the vehicle body side member while guiding the deformation of the overmolded part according to the assembly of the wheel bearing by the inclined part structure formed in the overmolded part, and thus the overmolded part It is possible to effectively prevent the occurrence of tears or damage to the overmolded portion or the elastic sealing portion of the sealing member due to the interference between the vehicle and the vehicle body side member.

In addition, the wheel bearing according to an embodiment of the present invention is configured such that the overmolded portion protruding outward in the radial direction is provided at the radial and axial outer end portions of the frame that becomes the body of the sealing member, so that the overmolded portion is the wheel bearing The coupled body-side member is brought into contact as late as possible, thereby further reducing the risk of damage to the sealing member due to interference with the body-side member in the process of assembling the wheel bearing to the body-side member.

1 exemplarily shows an example of a wheel bearing that can be used to rotatably mount and support a wheel of a vehicle to a vehicle body.
FIG. 2 exemplarily shows a state in which the wheel bearing shown in FIG. 1 is coupled to a body-side member.
3 exemplarily shows the structure of a wheel bearing according to an embodiment of the present invention.
4 exemplarily shows the structure of a sealing member that may be provided in a wheel bearing according to an embodiment of the present invention.
5 exemplarily illustrates a state in which a wheel bearing is coupled to a vehicle body side member according to an embodiment of the present invention. (The left side shows the wheel bearing before being coupled to the body side member, and the right side shows the wheel bearing coupled to the body side member)

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail enough to be easily implemented by a person skilled in the art to which the present invention pertains.

In order to clearly explain the present invention, detailed descriptions of parts not related to the present invention will be omitted, and the same components will be described with the same reference numerals throughout the specification. In addition, since the shape and size of each component shown in the drawings are arbitrarily illustrated for convenience of description, the present invention is not necessarily limited to the illustrated shape and size. That is, specific shapes, structures and characteristics described in the specification can be implemented by being modified from one embodiment to another without departing from the spirit and scope of the present invention, and the position or arrangement of individual components is also the spirit of the present invention. and it should be understood that changes may be made without departing from the scope. Therefore, the detailed description given below is not intended to be limiting, and the scope of the present invention should be taken as encompassing the scope of the claims and all equivalents thereto.

Wheel bearing according to an embodiment of the present invention

3 to 5 , a wheel bearing according to an embodiment of the present invention is illustrated by way of example. As shown in the drawings, the wheel bearing according to an embodiment of the present invention may be formed similarly to a conventional wheel bearing to perform a function of rotatably supporting the wheel with respect to the vehicle body between the wheel and the vehicle body of the vehicle.

According to an embodiment of the present invention, the wheel bearing 100 may be configured such that the inner member 110 and the outer member 140 are relatively rotatably connected through the rolling element 150, similar to a conventional wheel bearing. have.

In the case of the embodiment shown in the drawings, the wheel bearing is shown in a structure in which the inner member 110 functions as a rotating element and the outer member 140 functions as a non-rotating element, but the wheel according to an embodiment of the present invention Conversely, the bearing may be modified and implemented in various forms, such as an outer member functioning as a rotating element and an inner member functioning as a non-rotating element.

According to an embodiment of the present invention, the inner member 110 may be configured to include a wheel hub 120 to which a wheel is mounted, and an inner ring 130 to be press-fitted to and mounted on the wheel hub 120, and the like, and non-rotating. Element 140 may consist of an outer ring or the like that is coupled to a chassis component of the vehicle and secured to the vehicle body.

According to an embodiment of the present invention, the wheel hub 120 constituting the inner member 110 may be formed in a substantially cylindrical structure extending along the axial direction, and a wheel is located near the wheel side end of the wheel hub 120 . A wheel side mounting flange 122 for mounting may be provided. In addition, a step portion is formed at the end of the vehicle body side of the wheel hub 120 to be configured to mount the inner ring 130, and a raceway surface (inner raceway surface) is formed on a part of the outer peripheral surface of the wheel hub 120 to form a rolling element ( 150) may be configured to support radially inwardly.

According to an embodiment of the present invention, one or more inner rings 130 may be press-fitted and mounted on one side of the wheel hub 120 . For example, the inner ring 130 is plastically deformed as shown in FIG. 3 or the wheel hub 120 is press-fitted into the stepped portion formed at the vehicle body side end of the wheel hub 120 . ) may be configured to be seated and maintained on the wheel hub 120 by fastening a nut or the like to the end of the vehicle body side. In addition, the outer peripheral surface of the inner ring 130 may be provided with a raceway surface (inner raceway surface) in contact with the rolling element 150 to support the rolling element from the inside in the radial direction.

However, in the case of the embodiment shown in the drawings, one raceway surface for supporting the rolling element is directly formed on a part of the outer circumferential surface of the wheel hub. It may be configured to form the raceway surface (inner raceway surface) of the rolling element through the two inner rings by installing two inner rings, or it may be modified to any other wheel bearing structure, such as configured such that the inner race is mounted on the radially inner side of the wheel hub may be implemented.

According to an embodiment of the present invention, the outer ring constituting the outer member 140 has a vehicle body side mounting flange 142 for mounting the wheel bearing to the vehicle body side member on the outer circumferential surface, and the rolling element 150 is provided on the inner circumferential surface. It may be configured to have a contacting raceway surface (outer raceway surface). The raceway surface (outer raceway) formed on the inner circumferential surface of the outer member 140 (outer race) cooperates with the raceway surface (inner raceway) formed on the wheel hub 120 and/or the inner race 130 to form a rolling element between the raceways. It may be configured to receive and support the rolling element 150 .

According to one embodiment of the present invention, the rolling element 150 is disposed between the inner member 110 and the outer member 140, the wheel mounted on the inner member 110 is a vehicle body to which the outer member 140 is coupled. It can perform a function of rotatably supporting with respect to the.

According to an embodiment of the present invention, one or both ends of the wheel bearing 100 has a sealing member 200 for preventing foreign substances from being introduced into the wheel bearing or lubricating oil (griga) filled therein from leaking to the outside. ) may be provided.

Referring to FIG. 4 , the structure of the sealing member 200 that can be used by being mounted on the vehicle body side end of the wheel bearing 100 according to an embodiment of the present invention is illustrated by way of example.

As shown in the drawing, the sealing member 200 according to an embodiment of the present invention may include a frame 210 serving as a basic body and an elastic sealing unit 220 formed by being attached to the frame 210, , may be configured to be press-fitted to the outer member 140 of the wheel bearing 100 and the like.

According to an embodiment of the present invention, the frame 210 is a portion forming a body supporting the sealing member 200, and may be formed by bending a metal plate or the like. For example, the frame 210 includes a cylindrical press-fitting portion 210a that is press-fitted to the outer member 140 of the wheel bearing 100 and mounted; a first radial extension portion 210b bent to extend radially inwardly from the cylindrical press-fit portion 210a to cover all or a part of the axial cross-section of the outer member 140 of the wheel bearing 100; a first axial extension 210c bent from a radially inner end of the first radial extension 210b and extending in an axial direction; a second radial extension 210d bent from an axially inner end of the first axial extension 210c and extending radially inward; a second axial extension 210e that is bent at the radially inner end of the second radial extension 210d and extends axially outward; The second axial extension portion 210e may include a third radial extension portion 210f that is bent from the outer end of the second axial portion 210e and extends radially inward.

According to this structure, the frame 210 of the sealing member 200 is press-fitted to the outer circumferential surface of the outer member 140 constituting the wheel bearing 100 by the cylindrical press-fitting portion 210a provided at the outer end in the radial direction. It can be configured to be For example, in the frame 210 , in a state in which the cylindrical press-in portion 210a is press-fitted to the outer circumferential surface of the outer member 140 , the first radial extension portion 210b contacts or is adjacent to the axial end of the outer member 140 . It may be disposed so as to cover the axial end of the outer member 140 .

In addition, according to an embodiment of the present invention, the end of the cylindrical press-in portion 210a is formed in a structure bent outwardly in the radial direction, so that the overmolded portion 260 to be described later is attached to the frame 210 of the sealing member 200 . It may be configured to be more stably coupled to form.

According to an embodiment of the present invention, the frame 210 is formed to extend inwardly in the axial direction by the first axial extension portion 210c, which will be described later to perform sealing between the frame 210 and the vehicle body side member 300 . The auxiliary sealing lip 250 may be disposed closer to the vehicle body side member 300 to perform sealing.

On the other hand, according to the structure described above, a space is formed inside the frame by the first axial extension 210c, the second radial extension 210d, and the second axial extension 210e. The encoder ring 280 used to measure the rotational speed of the wheel bearing can be arranged.

According to an embodiment of the present invention, the portion extending axially inward by the first axial extension 210c extends axially outward again through the second axial extension 210e, and this second The axial extension 210e and/or the third radial extension 210f connected thereto may be configured to be provided with a main sealing lip 230, which will be described later, for sealing between the inner member of the wheel bearing. .

According to an embodiment of the present invention, the elastic sealing part 220 may be formed of an elastic material such as rubber to surround all or a part of the frame 210 . According to an embodiment of the present invention, the elastic sealing part 220 may be provided with one or more sealing lips extending from the frame 210 to perform sealing with the counterpart member.

According to an embodiment of the present invention, the elastic sealing lip 220 is an inner member [110; For example, in the case of the embodiment shown in the drawings, the main sealing lip 230 and the wheel bearing 100 are disposed adjacent to the inner ring 130 press-fitted to the wheel hub 120 and seal the bearing space in which the rolling element is located from the outside. ) may be configured to include an auxiliary sealing lip 250 performing sealing between the vehicle body side member 300 on which it is mounted.

According to an embodiment of the present invention, the main sealing lip 230 may be formed in a bent structure to extend radially inwardly and radially outwardly from the frame 210 of the sealing member 200, and such a bent It may be configured to contact the inner member 110 of the wheel bearing 100 on the inner circumferential surface of the negative to perform sealing. That is, the main sealing lip 230 may be configured such that the inner circumferential surface of the bent portion is a contact portion in contact with the inner member 110 .

On the other hand, the garter spring 240 is fastened to the outer circumferential surface of the bent part of the main sealing lip 230 to increase the adhesion of the main sealing lip 230, and thereby the sealing property by the main sealing lip 230 can be improved. have.

According to an embodiment of the present invention, the auxiliary sealing lip 250 of the sealing member 200 is located adjacent to the vehicle body side member 300 to which the wheel bearing 100 is coupled compared to the main sealing lip 230 ( For example, located in the axial direction), it may be configured to perform sealing between the vehicle body side member 300 and the vehicle body side member 300 . For example, the auxiliary sealing lip 250 is formed to extend toward the vehicle body side member 300 to which the wheel bearing 100 is coupled, as shown in FIGS. 3 and 5, so that the axial end face of the vehicle body side member 300 ( 340) with a predetermined amount of interference and may be configured to be in contact with or adjacently arranged to perform sealing.

According to an embodiment of the present invention, the sealing member 200 may be configured to include an overmold portion 260 formed to protrude radially outward from the radially outer portion. For example, according to an embodiment of the present invention, the overmolded portion 260 is formed at the radial and axial outer ends of the sealing member (eg, the end of the cylindrical press-fitting portion 210a positioned outside the radial direction) to form the wheel. It may be configured to seal a space formed between the outer member 140 of the bearing 100 and the vehicle body side member 300 to which the wheel bearing 100 is coupled.

As described above, by forming the overmold portion 260 formed to protrude outward in the radial direction on the sealing member 200 , the wheel bearing 100 according to an embodiment of the present invention is an overmold of the sealing member 200 . The part 260 comes into contact with the vehicle body side member 300 to which the wheel bearing 100 is coupled, so that the space between the wheel bearing 100 and the vehicle body side member 300 can be more stably sealed. It is possible to more effectively prevent the axle oil of the drive shaft from leaking to the outside through the space between the bearing 100 and the vehicle body side member 300 .

According to an embodiment of the present invention, the diameter of the radially outer portion of the overmolded portion 260 is larger than that of the corresponding inner peripheral surface of the vehicle body side member 300 coupled to the wheel bearing 100 in order to perform a smooth sealing function. The overmolded portion 260 includes an inclined portion 270 whose diameter decreases as it moves along the assembly direction of the wheel bearing on the surface in the direction in which the wheel bearing is assembled (direction toward the body side). can be configured to

Due to the structure of the inclined portion 270 , the wheel bearing 100 according to an embodiment of the present invention is an overmolded portion of the sealing member 200 when the wheel bearing 100 is inserted and coupled to the vehicle body side member 300 . Even if the 260 is in contact with the inner circumferential surface or the axial edge of the vehicle body side member 300, chafing or tearing does not occur and it can be easily deformed and mounted, and thus between the wheel bearing 100 and the vehicle body side member 300 It is possible to prevent deterioration of the assembly property of the wheel bearing 100 while improving the sealing property of the wheel bearing 100 .

For example, the sealing member 200 of the wheel bearing 100 according to an embodiment of the present invention is inclined to the surface (the surface facing the vehicle body) located in the assembly direction of the overmold part 260 protruding outward in the radial direction. Since it is configured to include the part 270, the inclined part 270 can be easily coupled while being guided into the vehicle body side member 300, and is shown in FIG. 5 due to the inclined structure of the inclined part 270 during the coupling process. As it is easily deformed, it can be stably mounted without damage.

According to an embodiment of the present invention, a plurality of inclined portions 270 provided in the overmold portion 260 may be provided to be spaced apart from each other in the axial direction, and a stepped structure is formed by the plurality of inclined portions 270 . can be configured to form. For example, in the case of the embodiment shown in the drawings, the overmolded portion 260 having a stepped structure is formed by two inclined portions 270 spaced apart in the axial direction. In this case, the outer circumferential surface of the inclined portion positioned adjacent to the vehicle body side may be configured to be positioned radially inward compared to the outer circumferential surface of the inclined surface positioned on the wheel side so that the assembly property of the wheel bearing 100 may be further improved [that is, The maximum diameter portion of the inclined portion located on the vehicle body side may be formed to have a smaller diameter than the maximum diameter portion of the inclined portion located on the wheel side].

However, the structure of the inclined portion 270 provided in the overmold portion 260 may be configured such that only one inclined portion is provided on the outer circumferential surface, or three or more inclined portions are formed spaced apart from the embodiment shown in the drawings. , as in the embodiment shown in the drawings, the inclined portion 270 may be formed in an inclined surface structure inclined at an angle with respect to the central axis, or alternatively, may be formed in a convex or concave inclined surface structure.

According to an embodiment of the present invention, the overmold portion 260 may be configured to surround the end of the cylindrical press-fit portion 210a of the frame 210 as shown in the drawing, and the cylindrical shape of the frame 210 is It may be configured to contact the outer member 140 of the wheel bearing 100 into which the frame 210 is press-fitted by protruding in the axial direction rather than the press-in portion 210a.

According to this structure, the sealing member 200 is the outer member 140 of the wheel bearing 100 by the contact between the overmolded part 260 formed of an elastic member and the outer member 140 of the wheel bearing 100 . can be more stably bound to

In addition, since the overmolded part 260 is configured to be formed at the radially and axially outer ends of the frame 210 , the overmolded part 260 comes into contact with the vehicle body side member 300 to which the wheel bearing is coupled as late as possible. Accordingly, it is possible to further reduce the risk of damage to the sealing member 200 due to interference with the vehicle body side member in the process of assembling the wheel bearing to the vehicle body side member.

On the other hand, in the case of the embodiment shown in the drawings, the overmolded part 260 is shown to be formed to be spaced apart from the other elastic sealing parts 220 , but the overmolded part 260 is a different part of the elastic sealing part 220 . It may be configured to be connected to each other along the outer circumferential surface of the frame 210 and the like.

According to an embodiment of the present invention, for more stable coupling between the wheel bearing 100 and the vehicle body side member 300 coupled thereto, the outer member 140 of the wheel bearing 100 and the corresponding vehicle body side member The coupling portion of the 300 may be configured to be provided with a stepped structure having a different diameter.

For example, the outer member 140 of the wheel bearing 100 according to an embodiment of the present invention is axially outward from the first outer circumferential surface 144 and the first outer circumferential surface 144 to which the sealing member 200 is press-fitted and mounted. The vehicle body side member 300 to which the wheel bearing 100 is coupled is located at the outer end in the axial direction and includes a second outer circumferential surface 146 that is spaced apart and has a larger diameter than the first outer circumferential surface 144, and the outer member ( The second inner circumferential surface 146 of 140 is spaced apart from the first inner circumferential surface 310 and the first inner circumferential surface 310 in the axial direction to which the second outer circumferential surface 146 is inserted and the second inner circumferential surface having a smaller diameter than the first inner circumferential surface 310 . It may be configured to include 320 and an inclined surface 330 positioned therebetween.

According to an embodiment of the present invention, the inclined surface 330 is formed in a structure in which the diameter decreases as it moves along the assembly direction of the wheel bearing (that is, toward the vehicle body), so that the above-described overmolded portion 260 is formed on the inclined surface 330 . ) may be configured to contact and couple, and the inclined surface 330 may be formed in a structure inclined at an angle with respect to the central axis as shown in the figure, or alternatively, may be formed in a inclined structure of a convex or concave shape.

According to an embodiment of the present invention, in the sealing member 200 of the wheel bearing 100 , the inclined portion 270 of the overmolded portion 260 is formed on the inner circumferential surface of the vehicle body side member 300 by the inclined surface 330 . It may be configured to be mounted while being pressurized.

According to this structure, since the inclined portion 270 of the overmolded portion 260 is coupled while contacting the inclined surface 330 formed on the inner circumferential surface of the vehicle body side member 300 to which the wheel bearing 100 is coupled, the overmolded portion As the 260 is more easily deformed, the wheel bearing 100 may be coupled to the vehicle body side member 300, thereby further improving the performance and lifespan of the wheel bearing 100 and the sealing member 200. there will be

Above, the present invention has been described with specific items such as specific components and limited embodiments, but these embodiments are provided only to help a more general understanding of the present invention, and the present invention is not limited thereto, and the present invention is not limited thereto. Those of ordinary skill in the art can devise various modifications and variations from these descriptions.

Accordingly, the spirit of the present invention should not be limited to the above-described embodiments, and that all equivalents or equivalent modifications in the claims as well as the claims described below fall within the scope of the spirit of the present invention. something to do.

100: wheel bearing
110: inner member
120: wheel hub
122: wheel side mounting flange
130: inner ring
140: outer member
142: body side mounting flange
144: (of the outer member) the first outer peripheral surface
146: (of the outer member) the second outer circumferential surface
150: rolling element
200: sealing member
210: frame
220: elastic sealing part
230: main sealing lip
240: garter spring
250: auxiliary sealing lip
260: overmold part
270: (obv mold part) inclined part
280: Encoder
300: body side member
310: (of the body-side member) first inner peripheral surface
320: (of the body-side member) the second inner peripheral surface
330: (of the body side member) inclined surface
340: axial section (of the body-side member)

Claims (15)

It is a wheel bearing 100 in which the inner member 110 and the outer member 140 are relatively rotatably connected through the rolling element 150,
A sealing member 200 is provided at the end of the wheel bearing 100 to prevent the inflow of foreign substances or the leakage of lubricating oil inside,
The sealing member 200 includes a frame 210 forming a basic body and an elastic sealing part 220 attached to the frame 210,
An overmold portion 260 formed to protrude outward in a radial direction is provided on the radially outer portion of the sealing member 200,
The overmold portion 260 is configured to include an inclined portion 270 whose diameter is reduced as it moves along the assembly direction on a surface positioned in the assembly direction of the wheel bearing 100,
wheel bearings. According to claim 1,
The inclined portion 270 is provided with a plurality of spaced apart along the axial direction,
wheel bearings. 3. The method of claim 2,
A plurality of inclined portions 270 provided to be spaced apart along the axial direction are formed in a stepped structure on the outer circumferential surface of the overmold portion 260,
wheel bearings. 4. The method of claim 3,
In the plurality of inclined portions 270 provided to be spaced apart along the axial direction, the outer peripheral surface of the inclined portions disposed closer to the vehicle body side member 300 to which the wheel bearing 100 is coupled is spaced apart from the vehicle body side member 300 . Formed to be located in the radial direction than the outer peripheral surface of the inclined portion to be arranged,
bearing device. 5. The method according to any one of claims 1 to 4,
The overmold portion 260 is formed at radial and axial outer ends of the frame 210 to surround the end of the frame 210 ,
wheel bearings. 6. The method of claim 5,
The outer member 140 of the wheel bearing 100 includes a first outer peripheral surface 144 on which the sealing member 200 is mounted; and a second outer circumferential surface 146 positioned spaced apart from the first outer circumferential surface 144 in the axial direction and having a larger diameter than the first outer circumferential surface 144,
The vehicle body side member 300 to which the wheel bearing 100 is coupled includes a first inner circumferential surface 310 located at an outer end in the axial direction; a second inner circumferential surface 320 spaced apart from the first inner circumferential surface 310 in the axial direction and having a smaller diameter than the first inner circumferential surface 310; and an inclined surface 330 positioned between the first inner circumferential surface 310 and the second inner circumferential surface 320,
The wheel bearing 100 is configured such that the second outer circumferential surface 146 of the outer member 140 is inserted into the first inner circumferential surface 310 of the vehicle body side member 300 to be coupled,
wheel bearings. 7. The method of claim 6,
The inclined portion 270 of the overmold portion 260 is configured to be mounted in contact with the inclined surface 330 of the vehicle body side member 300 ,
wheel bearings. 8. The method of claim 7,
The frame 210 is
A cylindrical press-fitting part 210a which is press-fitted and mounted on the outer member 140, and
a first radial extension portion 210b extending radially inwardly from the cylindrical press-fit portion 210a;
a first axial extension 210c extending axially inwardly from the first radial extension 210b;
a second radial extension (210d) extending radially inwardly from the first axial extension (210c);
a second axial extension portion 210e extending outward in the axial direction from the second radial extension portion 210d;
a third radial extension (210f) extending radially inwardly from the second axial extension (210e);
wheel bearings. 9. The method of claim 8,
The first radial extension portion 210b of the frame 210 is positioned opposite to the axial cross section of the outer member 140 to which the sealing member 200 is press-fitted,
wheel bearings. 10. The method of claim 9,
The encoder ring 280 used to measure the rotational speed of the wheel bearing in the space formed by the first axial extension 210c, the second radial extension 210d, and the second axial extension 210e. configured to be placed,
wheel bearings. 8. The method of claim 7,
The elastic sealing part 220 of the sealing member 200 includes a main sealing lip 230 for sealing between the inner member 110 of the wheel bearing 100 and,
wheel bearings. 12. The method of claim 11,
The main sealing lip 230 is in contact with the outer peripheral surface of one side of the inner member 110 to perform contact sealing,
wheel bearings. 13. The method of claim 12,
The main sealing lip 230 is formed in a bent structure to extend radially inwardly and radially outwardly,
The main sealing lip 230 is configured to contact the outer circumferential surface of the inner member 110 from the inner circumferential surface of the bent portion to perform sealing,
A garter spring 240 is fastened to the outer circumferential surface of the bent part of the main sealing lip 230,
wheel bearings. 13. The method of claim 12,
The elastic sealing part 220 further includes an auxiliary sealing lip 250 for sealing between the vehicle body side member 300 and,
wheel bearings. 15. The method of claim 14,
The auxiliary sealing lip 250 contacts the axial end face 340 of the vehicle body side member 300 to perform contact sealing,
wheel bearings.

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