WO2023249332A1 - Wheel bearing for vehicle - Google Patents

Wheel bearing for vehicle Download PDF

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Publication number
WO2023249332A1
WO2023249332A1 PCT/KR2023/008328 KR2023008328W WO2023249332A1 WO 2023249332 A1 WO2023249332 A1 WO 2023249332A1 KR 2023008328 W KR2023008328 W KR 2023008328W WO 2023249332 A1 WO2023249332 A1 WO 2023249332A1
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WO
WIPO (PCT)
Prior art keywords
wheel
recess
wheel hub
vehicle
constant velocity
Prior art date
Application number
PCT/KR2023/008328
Other languages
French (fr)
Korean (ko)
Inventor
조선기
이만철
김용수
이나연
신기철
Original Assignee
주식회사 일진글로벌
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 일진글로벌 filed Critical 주식회사 일진글로벌
Publication of WO2023249332A1 publication Critical patent/WO2023249332A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0005—Hubs with ball bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0015—Hubs for driven wheels
    • B60B27/0036—Hubs for driven wheels comprising homokinetic joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0078—Hubs characterised by the fixation of bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2380/00—Bearings
    • B60B2380/10—Type
    • B60B2380/12—Ball bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/111—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/131—Vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/133—Noise
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/09—Reducing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22316—Means for fastening or attaching the bellows or gaiters

Definitions

  • the present invention relates to a wheel bearing that supports a vehicle wheel by rotatably mounting it on a vehicle body, and more specifically, to a vehicle wheel bearing configured to be assembled by inserting the rolling member of the constant velocity joint into the inside of the wheel hub.
  • Wheel bearings are devices that support the wheels of a vehicle by rotatably mounted on the vehicle body. They can be divided into wheel bearings for driving wheels mounted on the driving wheels of a vehicle and wheel bearings for driven wheels mounted on the driven wheels of a vehicle.
  • a conventionally used wheel bearing for a drive shaft (so-called wheel bearing of the third generation structure) is shown as an example.
  • the wheel bearing 10 for the drive shaft connects the rotating element 20 on which the wheel is mounted to the non-rotating element 30 fixed to the vehicle body through a rolling element 40 to attach the wheel to the vehicle body. It is configured to rotatably support the wheel bearing, and a constant velocity joint 50 is coupled to one side of the wheel bearing to transmit the power generated by the driving device to the wheel bearing.
  • the constant velocity joint 50 typically has a structure in which a rolling member 70 (e.g., a ball member) and an inner member supporting the same are accommodated in the outer member 60, and a central axis 80 connected to a driving device is coupled to this inner member. It is formed at the wheel side end of the outer member 60, and a stem portion 65 extending in the axial direction is formed so that the splines formed on the outer peripheral surface of the stem portion 65 engage with the splines formed on the inner peripheral surface of the rotating element 20. It is configured to do so.
  • a rolling member 70 e.g., a ball member
  • an inner member supporting the same are accommodated in the outer member 60
  • a central axis 80 connected to a driving device is coupled to this inner member. It is formed at the wheel side end of the outer member 60, and a stem portion 65 extending in the axial direction is formed so that the splines formed on the outer peripheral surface of the stem portion 65 engage with the splines formed on the inner peripheral surface of
  • the wheel bearing of this structure is configured so that the constant velocity joint is coupled to the axial end of the wheel hub from the outside of the wheel hub, the axial length of the wheel bearing assembly becomes longer, and the spline formed on the outer peripheral surface of the stem portion is connected to the axial end of the wheel hub. It is configured to transmit power by engaging splines formed on the inner circumferential surface, so the constant velocity joint must be formed with a long stem part that penetrates the wheel hub, and the power transmission structure through axial spline combination generates noise or vibration during acceleration and deceleration. problems may appear.
  • the diameter of the wheel hub is increased in order to install the rolling element of the constant velocity joint by inserting it into the inside of the wheel hub, which may cause the problem of increasing the weight of the wheel bearing.
  • the present invention is intended to solve the above-described conventional problems, and in the wheel bearing configured to be assembled by inserting the rolling member of the constant velocity joint into the inside of the wheel hub, the inner peripheral surface of the body side end of the wheel hub is suppressed from increasing the weight of the wheel bearing.
  • the purpose is to provide a wheel bearing configured to form a stable raceway surface.
  • a representative configuration of the present invention to achieve the above-described object is as follows.
  • a wheel bearing is provided to support a vehicle wheel by rotatably mounting it on a vehicle body.
  • a wheel bearing according to an embodiment of the present invention includes a wheel hub having a wheel mounting flange; One or more inner rings press-fitted and mounted on the outer peripheral surface of the wheel hub; an outer ring having a vehicle body side mounting flange; It may include a plurality of rolling elements that support the wheel hub so that it can rotate relative to the outer ring.
  • an accommodating space capable of accommodating the rolling element of the constant velocity joint may be provided at the end of the vehicle body of the wheel hub, and a recess formed by being depressed outward in the radial direction may be provided on the inner peripheral surface of the accommodating space.
  • a plurality of recesses are provided spaced apart along the circumferential direction, and the axial length of the recesses may be formed to be 50% or more of the axial length of the wheel hub.
  • the minimum radial thickness between the recess and the outer peripheral surface of the wheel hub may be formed in the range of 1 mm to 4 mm.
  • a reinforcement portion extending radially inward may be provided on the inner peripheral surface of the receiving space.
  • the reinforcement portion may be provided in a portion of the receiving space where a recess is not formed.
  • the inner ring may be configured to be fixed by a forming portion formed by plastically deforming the vehicle body side end of the wheel hub radially outward.
  • the recess may be configured to be formed after forming the forming portion.
  • the recess may be configured to extend in a direction parallel to the axial direction.
  • the recess may be configured to extend in an inclined direction with respect to the axial direction.
  • the recess may be configured to be symmetrical left and right with respect to the reference plane.
  • the recess may be configured to extend obliquely in a direction that gets closer to the reference surface as it moves toward the wheel.
  • two or more recesses may be provided on both left and right sides around a reference plane.
  • a plurality of recesses are provided to be spaced apart in the circumferential direction on a reference virtual plane indicating the axial position where the rolling member of the constant velocity joint is located in the basic state.
  • the difference between the maximum and minimum values of the radial distance between the center of curvature and the central axis of the wheel bearing may be formed to be 0.05 mm or less.
  • the left recess and the right recess adjacent in the circumferential direction are It can be formed so that the difference in the diameter of the virtual circle formed by the center of curvature of the recess is 0.1 mm or less.
  • a plurality of recesses provided spaced apart in the circumferential direction
  • the difference in radius of curvature may be formed to be 0.05 mm or less.
  • the virtual surface may be configured to be formed at a position spaced apart from the reference virtual surface in the axial direction by 5 mm to 10 mm.
  • wheel bearing for a vehicle according to the present invention may further include other additional components without impairing the technical spirit of the present invention.
  • the wheel bearing according to an embodiment of the present invention forms an accommodating space in which the rolling member (e.g., ball member) of the constant velocity joint can be accommodated at the end of the vehicle body of the wheel hub, and the rolling member of the constant velocity joint is inserted into this accommodating space. Since it is configured to be mounted, the overall length of the wheel bearing can be shortened, the wheel bearing assembly can be miniaturized and lightweight, and noise or vibration can be suppressed when transmitting driving force.
  • the rolling member e.g., ball member
  • the wheel bearing according to an embodiment of the present invention is configured so that the constant velocity joint accommodation space provided at the vehicle body side end of the wheel hub and the recess provided in this accommodation space have an improved structure, so that the rolling element of the constant velocity joint Even when the wheel bearing assembly is formed to be inserted into the inside of the wheel hub, it is possible to secure the rigidity and function required for the wheel bearing while suppressing an increase in the weight of the wheel hub.
  • the wheel bearing according to an embodiment of the present invention is provided on the inner peripheral surface of the body side end of the wheel hub and is configured to form a recess for accommodating the rolling member of the constant velocity joint in the assembled state of the wheel bearing. It is possible to prevent deformation, etc. from occurring in the recess that becomes the raceway surface of the rolling member during the manufacturing or assembly process.
  • FIG. 1 exemplarily shows a wheel bearing for a drive shaft (the so-called wheel bearing of the third generation structure).
  • Figure 2 exemplarily shows a wheel bearing for a vehicle according to an embodiment of the present invention.
  • Figures 3 and 4 exemplarily show the cross-sectional structure of the wheel bearing for a vehicle shown in Figure 2.
  • Figure 5 exemplarily shows another embodiment of a wheel bearing for a vehicle according to an embodiment of the present invention.
  • FIG. 6 exemplarily shows the cross-sectional structure of the wheel bearing for a vehicle shown in FIG. 5.
  • axial direction refers to the direction extending along the central axis of rotation of the wheel bearing
  • radial direction refers to the direction perpendicular to this “axial direction” away from the central axis of rotation or closer to the central axis of rotation
  • circumferential direction means the direction of rotation centered on the aforementioned “axial direction”.
  • a component when referred to as being “located” or “formed” on one side of another component, this means that the component is positioned or formed in direct contact with one side of the other component. Alternatively, it should be understood that it can be positioned or formed with another new component interposed.
  • a wheel bearing 100 for a vehicle according to an embodiment of the present invention is shown as an example.
  • the wheel bearing 100 according to an embodiment of the present invention similar to a typical vehicle wheel bearing, has rotating elements (e.g., wheel hub 200 and inner ring 300) and non-rotating elements [ For example, it can be coupled to the outer ring 400 through the rolling element 500 to perform the function of rotatably supporting the wheel of the vehicle with respect to the vehicle body, and an accommodation space 220 at the vehicle body side end of the wheel hub 200. ) may be provided and configured to insert and install the rolling member (e.g., ball-shaped rolling element) of the constant velocity joint into the wheel hub.
  • the rolling member e.g., ball-shaped rolling element
  • the wheel bearing 100 is configured to include a wheel hub 200, an inner ring 300, an outer ring 400, a rolling element 500, etc., similar to a typical vehicle wheel bearing. You can.
  • the wheel hub 200 may be formed into a substantially cylindrical structure extending along the axial direction, and a wheel mounting flange 210 (hub flange) is provided on one outer peripheral surface of the wheel hub 200. It can be provided.
  • the wheel mounting flange 210 is formed in a shape that extends radially outward from the outer peripheral surface of the wheel hub 210 and can be used to mount a vehicle wheel to the wheel hub 210 using a hub bolt or the like.
  • the inner ring 300 may be mounted on the end of the wheel hub 200 on the vehicle body, and a raceway surface (inner raceway) of the rolling element is formed on a portion of the outer peripheral surface of the wheel hub 200, so that the rolling element 500 ) may be configured to support the radial inner side.
  • one or more inner rings 300 may be configured to be mounted on the outer peripheral surface of the wheel hub 200, and a raceway surface (inner raceway surface) of the rolling element is formed on the outer peripheral surface of the inner ring 200. It can be configured to support the rolling element 500 in the radial direction.
  • the inner ring 300 mounted on the wheel hub 200 is formed by plastically deforming the body side end of the wheel hub 200 or by combining a nut, etc. with the body side end of the wheel hub 200. It may be configured to be fixed to (200).
  • the outer ring 400 has a vehicle body side mounting flange 410 used to mount a wheel bearing to the vehicle body on its outer peripheral surface, and has a raceway surface with which the rolling element 500 contacts its inner peripheral surface. It can be configured to do so.
  • the raceway (outer raceway) formed on the inner peripheral surface of the outer ring 400 cooperates with the raceway (inner raceway) formed on the wheel hub 200 and/or the inner ring 300, and the rolling element, which is a rolling element, is between these raceway surfaces. It may be configured to accommodate and support (500).
  • the rolling element 500 includes a rotating element (e.g., wheel hub 200 and/or inner ring 300) and a non-rotating element (e.g., outer ring 400) of the wheel bearing 100. ] is interposed between them, and can perform the function of supporting the rotating element to enable relative rotation with respect to the non-rotating element.
  • a rotating element e.g., wheel hub 200 and/or inner ring 300
  • a non-rotating element e.g., outer ring 400 of the wheel bearing 100.
  • the wheel bearing is configured in such a way that one raceway surface for supporting the rolling element is formed directly on a portion of the outer peripheral surface of the wheel hub.
  • the wheel bearing according to one embodiment of the present invention is It is not necessarily limited to this structure, and may be modified into various other structures, such as mounting two inner rings on a wheel hub and supporting the rolling element through the two inner rings.
  • the vehicle body side end of the wheel hub 200 has a function of supporting the rolling member (not shown; e.g., ball member) of the constant velocity joint from the radial outside (e.g., the constant velocity joint in FIG. 1). It may be configured to perform the function previously performed by the outer member.
  • the wheel bearing 100 according to an embodiment of the present invention is provided with a receiving space 220 formed by being axially recessed at the end of the vehicle body side of the wheel hub 200, and has a radius on the inner peripheral surface of the receiving space 220. It may be provided with a recess 230 formed by being depressed outward in the direction, so that the rolling member of the constant velocity joint is accommodated in this recess 230.
  • the recess 230 formed on the inner peripheral surface (inner peripheral surface of the receiving space) of the vehicle body side end of the wheel hub 200 has a circumference equal to the number of rolling members provided in the constant velocity joint. It may be configured to be provided at least one along a direction.
  • the wheel bearing assembly 100 since the wheel bearing assembly 100 according to an embodiment of the present invention is configured to be mounted by inserting the rolling element of the constant velocity joint inside the vehicle body side end of the wheel hub 200, the constant velocity joint is inserted into the wheel bearing.
  • the length of the wheel bearing assembly can be shortened as it is combined, and as the body side end of the wheel hub performs the function of the outer member of the constant velocity joint, the number of parts is reduced and the wheel bearing assembly can be formed with a more compact structure. There will be.
  • the inner peripheral surface of the receiving space 220 where the rolling member of the constant velocity joint is accommodated may be configured to stably support the rolling member of the constant velocity joint by forming a heat treatment hardening portion.
  • the heat treatment hardened portion formed on the inner peripheral surface of the receiving space 220 includes at least all the parts where the rolling member of the constant velocity joint is in contact so that the rolling member of the constant velocity joint can provide stable rolling motion. It can be configured to form.
  • the heat treatment hardened portion formed on the inner peripheral surface of the receiving space 220 may be configured to include all of the recesses 230 into which the rolling member of the constant velocity joint is inserted and comes into contact.
  • the recess 230 may be configured to extend in the direction toward the vehicle body within the receiving space.
  • This recess 230 may be formed to extend in an inclined direction at a predetermined angle ⁇ with respect to the axial direction, as in the embodiment shown in FIGS. 2 to 4, and in FIGS. 5 and 6. As in the illustrated embodiment, it may be configured to extend in a direction parallel to the axial direction.
  • the recess 230 when the recess 230 is formed to extend in an inclined direction with respect to the axial direction as in the embodiment shown in FIGS. 2 to 4, the recess 230 has a reference surface ( It may be configured to be formed in a left-right symmetrical shape with respect to P).
  • a pair of recesses 230 are formed in a symmetrical shape on the left and right with the reference surface P as the center.
  • the recess 230 extending in an inclined direction may be configured to be inclined in a direction that gets closer to the reference surface P as it goes outward (as it moves toward the wheel).
  • the recess 230 may be formed to extend so that the axial length L is more than 50% of the axial length of the wheel hub 200.
  • the weight of the wheel hub can be reduced because the cleaning material of the wheel hub 200 can be removed as much as the portion where the recess 230 is formed. This makes it possible to suppress the problem of weight increase due to the large diameter of the wheel hub 200.
  • the minimum radial thickness of the recess 230 [t;
  • the radial thickness between the inner ring seating surface and the recess may be formed in a range of 1 mm to 4 mm.
  • a reinforcement portion 240 extending radially inward is formed in a portion of the receiving space 220 provided at the end of the vehicle body side of the wheel hub 200 where the recess 230 is not formed. may be provided.
  • the reinforcement portion 240 compensates for the decrease in rigidity that may occur due to the formation of the deep recess 230, and adjusts the axial length of the recess 230 to the axis of the wheel hub 200. Even when formed to more than 50% of the directional length, the function of maintaining the rigidity of the wheel hub 200 at the same level as before can be performed.
  • the reinforcement portion 240 may be configured to be formed in a portion of the receiving space 220 where the recess 230 is not formed.
  • a partition wall 250 is provided at the center of the wheel hub 200 to prevent the receiving space 220 formed at the end of the vehicle body side of the wheel hub 200 from being exposed to the outside.
  • a pilot unit 260 may be provided at the wheel side end of the wheel hub 200 and may be configured to guide the installation of the wheel when mounting the wheel on the wheel hub 200.
  • the recess 230 of the receiving space 220 provided at the vehicle body side end of the wheel hub 200 may be configured to be formed by processing the wheel bearing 100 in the assembled state. there is.
  • the wheel bearing 100 is installed during the assembly process, in particular, by press-fitting the inner ring 300 to the outer peripheral surface of the wheel hub 200, and then plastically deforming the body side end of the wheel hub 200 or tightening a nut, etc. to attach the inner ring 300. ), there is a risk of deformation occurring in the process of fixing the recess 230, and the deformation of the recess 230 thus generated may cause noise or vibration when transmitting driving force through the constant velocity joint.
  • the wheel bearing 100 is assembled after assembling the wheel bearing 100 (for example, by press-fitting the inner ring 300 into the wheel hub 200 and then attaching it to the vehicle body of the wheel hub 200). [After fixing the inner ring 300 by plastically deforming the side end], a recess 230 is formed on the inner peripheral surface of the receiving space 220 provided at the body side end of the wheel hub 200. It can be.
  • the recess 230 may be formed on the inner peripheral surface of the receiving space 220 through a method such as polishing.
  • the recess 230 is a reference indicating the axial position where the rolling member (e.g., ball member) of the constant velocity joint is located in the basic state when the constant velocity joint is assembled to the wheel bearing 100.
  • the virtual plane A; virtual plane perpendicular to the axial direction
  • the left recess 230a and the right recess 230b adjacent in the circumferential direction on the reference virtual surface A have a virtual circle diameter (BCD; Ball) formed by the center of curvature of the recess.
  • BCD virtual circle diameter
  • the difference in Circle Diameter can be formed to be less than 0.1mm.
  • the constant velocity joint in a state in which the constant velocity joint is assembled to the wheel bearing 100, the constant velocity joint is spaced in the circumferential direction on the virtual planes (B, C) representing the axial end positions where the constant velocity joint can be located during steering.
  • the difference in curvature radii of the plurality of recesses 230 may be formed to be 0.05 mm or less.
  • the virtual surface (B) at a position spaced apart in the wheel side direction and the virtual surface (C) at a position spaced apart in the vehicle body direction are spaced apart from the reference virtual surface (A) by 5 mm to 10 mm in the axial direction. It can be set to the desired location.

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

Abstract

According to an embodiment of the present invention, provided is a wheel bearing which mounts the wheel of a vehicle to a vehicle body to be rotatable and supports the wheel. A wheel bearing assembly according to an embodiment of the present invention may comprise: a wheel hub provided with a wheel mounting flange; at least one inner wheel press-fitted and mounted on the outer circumference of the wheel hub; an outer wheel provided with a vehicle body-side mounting flange; and a plurality of rolling elements supporting the wheel hub to be rotatable relative to the outer wheel. According to an embodiment of the present invention, an accommodation space which can accommodate the rolling element of a constant velocity joint may be provided in the end portion of the wheel hub at the vehicle body side, and a recess formed to be recessed to the outer side in the radial direction may be provided in the inner circumference of the accommodation space. According to an embodiment of the present invention, a plurality of recesses are provided to be spaced apart from one another in the circumferential direction, and the length of the recess in the axial direction may be 50% or greater of the length of the wheel hub in the axial direction.

Description

차량용 휠베어링Vehicle wheel bearings
본 발명은 차량의 휠을 차체에 회전 가능하게 장착하여 지지하는 휠베어링에 관한 것으로, 보다 상세하게는 등속조인트의 구름부재를 휠허브의 내측으로 삽입시켜 조립하도록 구성된 차량용 휠베어링에 관한 것이다.The present invention relates to a wheel bearing that supports a vehicle wheel by rotatably mounting it on a vehicle body, and more specifically, to a vehicle wheel bearing configured to be assembled by inserting the rolling member of the constant velocity joint into the inside of the wheel hub.
휠베어링은 차량의 휠을 차체에 회전 가능하게 장착하여 지지하는 장치로, 차량의 구동륜에 장착되는 구동륜용 휠베어링과 차량의 종동륜에 장착되는 종동륜용 휠베어링으로 구분될 수 있다.Wheel bearings are devices that support the wheels of a vehicle by rotatably mounted on the vehicle body. They can be divided into wheel bearings for driving wheels mounted on the driving wheels of a vehicle and wheel bearings for driven wheels mounted on the driven wheels of a vehicle.
도 1을 참조하면, 종래에 이용되고 있는 구동축용 휠베어링(소위, 3세대 구조의 휠베어링)이 예시적으로 도시되어 있다.Referring to FIG. 1, a conventionally used wheel bearing for a drive shaft (so-called wheel bearing of the third generation structure) is shown as an example.
도 1에 도시된 바와 같이, 구동축용 휠베어링(10)은 휠이 장착되는 회전요소(20)가 차체에 고정되는 비회전요소(30)에 전동체(40)를 통해 연결되어 휠을 차체에 대해 회전 가능하게 지지하도록 구성되며, 휠베어링의 일측에는 등속조인트(50)가 결합되어 구동장치에서 발생된 동력을 휠베어링으로 전달하도록 구성된다.As shown in FIG. 1, the wheel bearing 10 for the drive shaft connects the rotating element 20 on which the wheel is mounted to the non-rotating element 30 fixed to the vehicle body through a rolling element 40 to attach the wheel to the vehicle body. It is configured to rotatably support the wheel bearing, and a constant velocity joint 50 is coupled to one side of the wheel bearing to transmit the power generated by the driving device to the wheel bearing.
등속조인트(50)는 통상적으로 외측부재(60) 내에 구름부재(70; 예컨대, 볼 부재) 및 이를 지지하는 내측부재가 수용되고 이러한 내측부재에 구동장치에 연결된 중심축(80)이 결합되는 구조로 형성되며, 외측부재(60)의 휠측 단부에는 축방향으로 연장하는 스템부(65)가 형성되어 스템부(65)의 외주면에 형성된 스플라인이 회전요소(20)의 내주면에 형성된 스플라인과 맞물려 결합하도록 구성된다.The constant velocity joint 50 typically has a structure in which a rolling member 70 (e.g., a ball member) and an inner member supporting the same are accommodated in the outer member 60, and a central axis 80 connected to a driving device is coupled to this inner member. It is formed at the wheel side end of the outer member 60, and a stem portion 65 extending in the axial direction is formed so that the splines formed on the outer peripheral surface of the stem portion 65 engage with the splines formed on the inner peripheral surface of the rotating element 20. It is configured to do so.
그런데, 이러한 구조의 휠베어링은 등속조인트가 휠허브의 외측에서 휠허브의 축방향 단부에 결합되도록 구성되기 때문에 휠베어링 조립체의 축방향 길이가 길어지게 되며, 스템부의 외주면에 형성된 스플라인을 휠허브의 내주면에 형성된 스플라인에 맞물려 동력을 전달하도록 구성되어 있어 등속조인트에 휠허브를 관통하는 긴 길이의 스템부가 형성되어야 하고, 축방향 스플라인 결합을 통한 동력전달구조로 인해 가속 및 감속시 소음이나 진동이 발생하는 문제가 나타날 수 있다.However, since the wheel bearing of this structure is configured so that the constant velocity joint is coupled to the axial end of the wheel hub from the outside of the wheel hub, the axial length of the wheel bearing assembly becomes longer, and the spline formed on the outer peripheral surface of the stem portion is connected to the axial end of the wheel hub. It is configured to transmit power by engaging splines formed on the inner circumferential surface, so the constant velocity joint must be formed with a long stem part that penetrates the wheel hub, and the power transmission structure through axial spline combination generates noise or vibration during acceleration and deceleration. problems may appear.
이러한 문제를 개선하기 위한 방안으로, 등속조인트의 구름요소를 휠허브의 내측으로 삽입시켜 휠허브의 차체측 단부가 등속조인트의 외측부재의 기능을 함께 수행하도록 구성된 휠베어링이 제안되고 있다. (소위, 4세대 구조의 휠베어링)As a way to improve this problem, a wheel bearing has been proposed in which the rolling element of the constant velocity joint is inserted into the inside of the wheel hub so that the body side end of the wheel hub also performs the function of the outer member of the constant velocity joint. (So-called 4th generation wheel bearings)
그러나, 이러한 4세대 구조의 휠베어링은 등속조인트의 구름요소를 휠허브의 내측으로 삽입하여 장착하기 위해 휠허브의 직경이 대구경화 되고 이로 인해 휠베어링의 중량을 증가시키는 문제를 야기할 수 있다.However, in the wheel bearing of this 4th generation structure, the diameter of the wheel hub is increased in order to install the rolling element of the constant velocity joint by inserting it into the inside of the wheel hub, which may cause the problem of increasing the weight of the wheel bearing.
본 발명은 전술한 종래의 문제점을 해소하기 위한 것으로, 등속조인트의 구름부재를 휠허브의 내측으로 삽입시켜 조립하도록 구성된 휠베어링에 있어서, 휠베어링의 중량 증가를 억제하면서 휠허브의 차체측 단부 내주면에 안정적인 궤도면을 형성할 수 있도록 구성된 휠베어링을 제공하는 것을 목적으로 한다.The present invention is intended to solve the above-described conventional problems, and in the wheel bearing configured to be assembled by inserting the rolling member of the constant velocity joint into the inside of the wheel hub, the inner peripheral surface of the body side end of the wheel hub is suppressed from increasing the weight of the wheel bearing. The purpose is to provide a wheel bearing configured to form a stable raceway surface.
전술한 목적을 달성하기 위한 본 발명의 대표적인 구성은 다음과 같다. A representative configuration of the present invention to achieve the above-described object is as follows.
본 발명의 일 실시예에 따르면, 차량의 휠을 차체에 회전 가능하게 장착하여 지지하는 휠베어링이 제공된다. 본 발명의 일 실시예에 따른 휠베어링은, 휠장착 플랜지를 구비하는 휠허브와; 휠허브의 외주면에 압입되어 장착되는 하나 이상의 내륜과; 차체측 장착 플랜지를 구비하는 외륜과; 휠허브를 외륜에 대해 상대회전 가능하게 지지하는 복수의 전동체를 포함할 수 있다. 본 발명의 일 실시예에 따르면, 휠허브의 차체측 단부에는 등속조인트의 구름요소를 수용할 수 있는 수용공간이 구비되고, 수용공간의 내주면에는 반경방향 외측으로 함몰되어 형성된 리세스가 구비될 수 있다. 본 발명의 일 실시예에 따르면, 리세스는 원주방향을 따라 이격되어 복수로 구비되고, 리세스의 축방향 길이는 휠허브의 축방향 길이의 50% 이상이 되도록 형성될 수 있다.According to one embodiment of the present invention, a wheel bearing is provided to support a vehicle wheel by rotatably mounting it on a vehicle body. A wheel bearing according to an embodiment of the present invention includes a wheel hub having a wheel mounting flange; One or more inner rings press-fitted and mounted on the outer peripheral surface of the wheel hub; an outer ring having a vehicle body side mounting flange; It may include a plurality of rolling elements that support the wheel hub so that it can rotate relative to the outer ring. According to one embodiment of the present invention, an accommodating space capable of accommodating the rolling element of the constant velocity joint may be provided at the end of the vehicle body of the wheel hub, and a recess formed by being depressed outward in the radial direction may be provided on the inner peripheral surface of the accommodating space. there is. According to one embodiment of the present invention, a plurality of recesses are provided spaced apart along the circumferential direction, and the axial length of the recesses may be formed to be 50% or more of the axial length of the wheel hub.
본 발명의 일 실시예에 따르면, 리세스와 휠허브의 외주면 사이의 반경방향 최소 두께는 1mm 내지 4mm 범위로 형성될 수 있다.According to one embodiment of the present invention, the minimum radial thickness between the recess and the outer peripheral surface of the wheel hub may be formed in the range of 1 mm to 4 mm.
본 발명의 일 실시예에 따르면, 수용공간의 내주면에는 반경방향 내측으로 연장하여 형성된 보강부가 구비될 수 있다.According to one embodiment of the present invention, a reinforcement portion extending radially inward may be provided on the inner peripheral surface of the receiving space.
본 발명의 일 실시예에 따르면, 보강부는 수용공간에서 리세스가 형성되지 않은 부분에 구비될 수 있다.According to one embodiment of the present invention, the reinforcement portion may be provided in a portion of the receiving space where a recess is not formed.
본 발명의 일 실시예에 따르면, 내륜은 휠허브의 차체측 단부를 반경방향 외측으로 소성 변형시켜 형성된 포밍부에 의해 고정되도록 구성될 수 있다.According to one embodiment of the present invention, the inner ring may be configured to be fixed by a forming portion formed by plastically deforming the vehicle body side end of the wheel hub radially outward.
본 발명의 일 실시예에 따르면, 리세스는 포밍부를 형성한 이후에 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the recess may be configured to be formed after forming the forming portion.
본 발명의 일 실시예에 따르면, 리세스는 축방향에 평행한 방향으로 연장되어 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the recess may be configured to extend in a direction parallel to the axial direction.
본 발명의 일 실시예에 따르면, 리세스는 축방향에 대해 경사진 방향으로 연장되어 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the recess may be configured to extend in an inclined direction with respect to the axial direction.
본 발명의 일 실시예에 따르면, 리세스는 기준면에 대해 좌우로 대칭되어 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the recess may be configured to be symmetrical left and right with respect to the reference plane.
본 발명의 일 실시예에 따르면, 리세스는 휠측으로 이동할수록 기준면에 가까워지는 방향으로 경사지게 연장되어 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the recess may be configured to extend obliquely in a direction that gets closer to the reference surface as it moves toward the wheel.
본 발명의 일 실시예에 따르면, 리세스는 기준면을 중심으로 좌우 양측으로 2개 이상씩 구비되도록 구성될 수 있다.According to an embodiment of the present invention, two or more recesses may be provided on both left and right sides around a reference plane.
본 발명의 일 실시예에 따르면, 휠베어링에 등속조인트가 조립될 때 기본 상태에서 등속조인트의 구름부재가 위치하는 축방향 위치를 나타내는 기준 가상면에서, 원주방향으로 이격되어 구비된 복수의 리세스의 곡률 중심과 휠베어링의 중심축 사이의 반경방향 거리의 최대값과 최소값 사이의 차이는 0.05mm 이하가 되도록 형성될 수 있다.According to an embodiment of the present invention, when a constant velocity joint is assembled to a wheel bearing, a plurality of recesses are provided to be spaced apart in the circumferential direction on a reference virtual plane indicating the axial position where the rolling member of the constant velocity joint is located in the basic state. The difference between the maximum and minimum values of the radial distance between the center of curvature and the central axis of the wheel bearing may be formed to be 0.05 mm or less.
본 발명의 일 실시예에 따르면, 휠베어링에 등속조인트가 조립될 때 기본 상태에서 등속조인트의 구름부재가 위치하는 축방향 위치를 나타내는 기준 가상면에서, 원주방향으로 인접한 좌측 리세스와 우측 리세스는 리세스의 곡률 중심에 의해 형성되는 가상원 직경의 차이가 0.1mm 이하가 되도록 형성될 수 있다.According to one embodiment of the present invention, when a constant velocity joint is assembled to a wheel bearing, in the reference virtual plane representing the axial position where the rolling member of the constant velocity joint is located in the basic state, the left recess and the right recess adjacent in the circumferential direction are It can be formed so that the difference in the diameter of the virtual circle formed by the center of curvature of the recess is 0.1 mm or less.
본 발명의 일 실시예에 따르면, 휠베어링에 등속조인트가 조립된 상태에서 조향시 등속조인트가 위치할 수 있는 축방향 양단 위치를 나타내는 가상면에서, 원주방향으로 이격되어 구비된 복수의 리세스의 곡률 반경의 차이는 0.05mm 이하가 되도록 형성될 수 있다.According to an embodiment of the present invention, in a state where the constant velocity joint is assembled to the wheel bearing, in a virtual plane representing the axial end positions where the constant velocity joint can be located during steering, a plurality of recesses provided spaced apart in the circumferential direction The difference in radius of curvature may be formed to be 0.05 mm or less.
본 발명의 일 실시예에 따르면, 가상면은 기준 가상면으로부터 5mm 내지 10mm 축방향으로 이격된 위치에 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the virtual surface may be configured to be formed at a position spaced apart from the reference virtual surface in the axial direction by 5 mm to 10 mm.
이 외에도, 본 발명에 따른 차량용 휠베어링에는 본 발명의 기술적 사상을 해치지 않는 범위에서 다른 부가적인 구성이 더 포함될 수 있다.In addition to this, the wheel bearing for a vehicle according to the present invention may further include other additional components without impairing the technical spirit of the present invention.
본 발명의 일 실시예에 따른 휠베어링은 휠허브의 차체측 단부에 등속조인트의 구름부재(예컨대, 볼 부재)가 수용될 수 있는 수용공간을 형성해 이러한 수용공간 내에 등속조인트의 구름부재가 삽입되어 장착되도록 구성되어 있기 때문에, 휠베어링의 전체적인 길이가 짧아질 수 있고 휠베어링 조립체의 소형화 및 경량화가 도모될 수 있으며 구동력 전달시 소음이나 진동이 발생하는 것을 억제할 수 있게 된다.The wheel bearing according to an embodiment of the present invention forms an accommodating space in which the rolling member (e.g., ball member) of the constant velocity joint can be accommodated at the end of the vehicle body of the wheel hub, and the rolling member of the constant velocity joint is inserted into this accommodating space. Since it is configured to be mounted, the overall length of the wheel bearing can be shortened, the wheel bearing assembly can be miniaturized and lightweight, and noise or vibration can be suppressed when transmitting driving force.
또한, 본 발명의 일 실시예에 따른 휠베어링은 휠허브의 차체측 단부에 구비되는 등속조인트 수용공간 및 이러한 수용공간에 구비되는 리세스가 개선된 구조를 갖도록 구성되어 있어, 등속조인트의 구름요소가 휠허브의 내측으로 삽입되도록 휠베어링 조립체를 형성하는 경우에도 휠허브의 중량 증가를 억제하면서 휠베어링에 요구되는 강성 및 기능을 확보할 수 있게 된다.In addition, the wheel bearing according to an embodiment of the present invention is configured so that the constant velocity joint accommodation space provided at the vehicle body side end of the wheel hub and the recess provided in this accommodation space have an improved structure, so that the rolling element of the constant velocity joint Even when the wheel bearing assembly is formed to be inserted into the inside of the wheel hub, it is possible to secure the rigidity and function required for the wheel bearing while suppressing an increase in the weight of the wheel hub.
또한, 본 발명의 일 실시예에 따른 휠베어링은 휠허브의 차체측 단부의 내주면에 구비되어 등속조인트의 구름부재를 수용하는 리세스를 휠베어링이 조립된 상태에서 형성하도록 구성되어 있어, 휠베어링의 제조 또는 조립 과정에서 구름부재의 궤도면이 되는 리세스에 변형 등이 발생하는 것을 방지할 수 있게 된다.In addition, the wheel bearing according to an embodiment of the present invention is provided on the inner peripheral surface of the body side end of the wheel hub and is configured to form a recess for accommodating the rolling member of the constant velocity joint in the assembled state of the wheel bearing. It is possible to prevent deformation, etc. from occurring in the recess that becomes the raceway surface of the rolling member during the manufacturing or assembly process.
도 1은 구동축용 휠베어링(소위, 3세대 구조의 휠베어링)을 예시적으로 도시한다.1 exemplarily shows a wheel bearing for a drive shaft (the so-called wheel bearing of the third generation structure).
도 2는 본 발명의 일 실시예에 따른 차량용 휠베어링을 예시적으로 도시한다. Figure 2 exemplarily shows a wheel bearing for a vehicle according to an embodiment of the present invention.
도 3 및 도 4는 도 2에 도시된 차량용 휠베어링의 단면 구조를 예시적으로 도시한다.Figures 3 and 4 exemplarily show the cross-sectional structure of the wheel bearing for a vehicle shown in Figure 2.
도 5는 본 발명의 일 실시예에 따른 차량용 휠베어링의 다른 실시형태를 예시적으로 도시한다.Figure 5 exemplarily shows another embodiment of a wheel bearing for a vehicle according to an embodiment of the present invention.
도 6은 도 5에 도시된 차량용 휠베어링의 단면 구조를 예시적으로 도시한다.FIG. 6 exemplarily shows the cross-sectional structure of the wheel bearing for a vehicle shown in FIG. 5.
<부호의 설명><Explanation of symbols>
100: 휠베어링100: wheel bearing
200: 휠허브200: wheel hub
210: 휠장착 플랜지210: Wheel mounting flange
220: 수용공간220: Accommodation space
230: 리세스230: recess
240: 보강부240: reinforcement part
250: 격벽250: Bulkhead
260: 파일럿부260: Pilot unit
300: 내륜300: inner ring
400: 외륜400: paddle
410: 차체측 장착 플랜지410: Body side mounting flange
500: 전동체500: rolling element
L: 리세스의 축방향 길이L: Axial length of recess
t: 리세스의 최소 반경방향 살두께t: Minimum radial thickness of the recess
이하에서 기술되는 실시예들은 본 발명의 기술적 사상을 설명하기 위한 목적으로 예시된 것으로, 본 발명의 권리범위가 이하에 제시되는 실시예들이나 이에 대한 구체적인 설명으로 제한되는 것은 아니다.The embodiments described below are illustrative 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 or detailed descriptions presented below.
본 명세서에서 사용되는 모든 기술적 용어들 및 과학적 용어들은 달리 정의되지 않는 한 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 일반적으로 이해되는 의미를 가지며, 본 명세서에서 사용되는 모든 용어들은 본 발명을 더욱 명확히 설명하기 위한 목적으로 선택된 것으로서 본 발명의 권리범위를 제한하기 위해 선택된 것이 아니다.All technical and scientific terms used in this specification, unless otherwise defined, have meanings commonly understood by those skilled in the art to which the present invention pertains, and all terms used in this specification refer to the present invention. It was selected for the purpose of explaining more clearly and was not selected to limit the scope of the present invention.
본 명세서에서 사용되는 "포함하는", "구비하는", "갖는" 등과 같은 표현은 해당 표현이 포함되는 어구 또는 문장에서 달리 언급되지 않는 한 다른 실시예를 포함할 가능성을 내포하는 개방형 용어(open-ended terms)로 이해되어야 한다.As used herein, expressions such as “comprising,” “comprising,” “having,” and the like are open terms implying the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing the expression. -ended terms).
본 명세서에서 “축방향”은 휠베어링의 회전 중심축을 따라 연장하는 방향을 의미하고, “반경방향”은 이러한 “축방향”에 수직하게 회전 중심축으로부터 멀어지거나 회전 중심축에 가까워지는 방향을 의미하고, “원주방향”은 전술한 “축방향”을 중심으로 하는 회전 방향을 의미한다.In this specification, “axial direction” refers to the direction extending along the central axis of rotation of the wheel bearing, and “radial direction” refers to the direction perpendicular to this “axial direction” away from the central axis of rotation or closer to the central axis of rotation. And “circumferential direction” means the direction of rotation centered on the aforementioned “axial direction”.
본 명세서에 기재된 단수형의 표현은 달리 언급하지 않는 한 복수형의 의미를 포함할 수 있으며, 이는 청구범위에 기재된 단수형의 표현에도 마찬가지로 적용된다.The singular forms used herein may include the plural, unless otherwise stated, and this also applies to the singular forms used in the claims.
본 명세서에서 어떤 구성요소가 다른 구성요소의 일측에 “위치되어” 있다거나 “형성되어” 있다고 언급되는 경우, 이는 어떤 구성요소가 다른 구성요소의 일측에 직접 접촉된 상태로 위치되거나 형성되는 것으로, 또는 새로운 다른 구성요소를 중간에 개재한 상태로 위치하거나 형성될 수 있는 것으로 이해되어야 한다.In this specification, when a component is referred to as being “located” or “formed” on one side of another component, this means that the component is positioned or formed in direct contact with one side of the other component. Alternatively, it should be understood that it can be positioned or formed with another new component interposed.
이하, 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대해 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있을 정도로 상세하게 설명한다. 첨부된 도면에서, 동일하거나 대응하는 구성요소는 동일한 참조부호를 통해 지시되어 있으며, 이하의 실시예들의 설명에 있어서 동일하거나 대응하는 구성요소는 중복하여 기술하는 것이 생략될 수 있다. 다만, 아래의 설명에서 특정 구성요소에 관한 기술이 생략되어 있더라도, 이는 그러한 구성요소가 해당 실시예에 포함되지 않는 것으로 의도되지는 않는다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail so that a person skilled in the art can easily implement the present invention. In the accompanying drawings, identical or corresponding components are indicated by the same reference numerals, and in the description of the following embodiments, duplicate descriptions of identical or corresponding components may be omitted. However, even if descriptions of specific components are omitted in the description below, this does not mean that such components are not included in the embodiment.
도 2 내지 도 6을 참조하면, 본 발명의 일 실시예에 따른 차량용 휠베어링(100)이 예시적으로 도시되어 있다. 도면에 도시된 바와 같이, 본 발명의 일 실시예에 따른 휠베어링(100)은 통상의 차량용 휠베어링과 유사하게 회전요소[예컨대, 휠허브(200) 및 내륜(300)]가 비회전요소[예컨대, 외륜(400)]에 전동체(500)를 통해 결합되어 차량의 휠을 차체에 대해 회전 가능하게 지지하는 기능을 수행할 수 있으며, 휠허브(200)의 차체측 단부에는 수용공간(220)이 구비되어 등속조인트의 구름부재(예컨대, 볼 형상의 전동체)를 휠허브 내로 삽입하여 장착하도록 구성될 수 있다.2 to 6, a wheel bearing 100 for a vehicle according to an embodiment of the present invention is shown as an example. As shown in the drawing, the wheel bearing 100 according to an embodiment of the present invention, similar to a typical vehicle wheel bearing, has rotating elements (e.g., wheel hub 200 and inner ring 300) and non-rotating elements [ For example, it can be coupled to the outer ring 400 through the rolling element 500 to perform the function of rotatably supporting the wheel of the vehicle with respect to the vehicle body, and an accommodation space 220 at the vehicle body side end of the wheel hub 200. ) may be provided and configured to insert and install the rolling member (e.g., ball-shaped rolling element) of the constant velocity joint into the wheel hub.
본 발명의 일 실시예에 따르면, 휠베어링(100)은 통상의 차량용 휠베어링과 유사하게 휠허브(200), 내륜(300), 외륜(400), 전동체(500) 등을 포함하여 구성될 수 있다.According to one embodiment of the present invention, the wheel bearing 100 is configured to include a wheel hub 200, an inner ring 300, an outer ring 400, a rolling element 500, etc., similar to a typical vehicle wheel bearing. You can.
본 발명의 일 실시예에 따르면, 휠허브(200)는 축방향을 따라 연장하는 대략 원통형의 구조로 형성될 수 있으며, 휠허브(200)의 일측 외주면에는 휠장착 플랜지(210; 허브 플랜지)가 구비될 수 있다. 휠장착 플랜지(210)는 휠허브(210)의 외주면으로부터 반경방향 외측으로 연장된 형상으로 형성되어 허브 볼트 등을 이용해 차량의 휠을 휠허브(210)에 장착하는데 이용될 수 있다. 한편, 휠허브(200)의 차체측 단부에는 내륜(300)이 장착되도록 구성될 수 있으며, 휠허브(200)의 외주면 일부에는 전동체의 궤도면(내측 궤도면)이 형성되어 전동체(500)를 반경방향 내측에서 지지하도록 구성될 수 있다.According to one embodiment of the present invention, the wheel hub 200 may be formed into a substantially cylindrical structure extending along the axial direction, and a wheel mounting flange 210 (hub flange) is provided on one outer peripheral surface of the wheel hub 200. It can be provided. The wheel mounting flange 210 is formed in a shape that extends radially outward from the outer peripheral surface of the wheel hub 210 and can be used to mount a vehicle wheel to the wheel hub 210 using a hub bolt or the like. Meanwhile, the inner ring 300 may be mounted on the end of the wheel hub 200 on the vehicle body, and a raceway surface (inner raceway) of the rolling element is formed on a portion of the outer peripheral surface of the wheel hub 200, so that the rolling element 500 ) may be configured to support the radial inner side.
본 발명의 일 실시예에 따르면, 내륜(300)은 휠허브(200)의 외주면에 하나 이상 장착되도록 구성될 수 있으며, 내륜(200)의 외주면에는 전동체의 궤도면(내측 궤도면)이 형성되어 전동체(500)를 반경방향 내측에서 지지하도록 구성될 수 있다. 휠허브(200)에 장착된 내륜(300)은 도면에 도시된 바와 같이 휠허브(200)의 차체측 단부를 소성변형시키거나 휠허브(200)의 차체측 단부에 너트 등을 결합해 휠허브(200)에 고정되도록 구성될 수 있다.According to one embodiment of the present invention, one or more inner rings 300 may be configured to be mounted on the outer peripheral surface of the wheel hub 200, and a raceway surface (inner raceway surface) of the rolling element is formed on the outer peripheral surface of the inner ring 200. It can be configured to support the rolling element 500 in the radial direction. As shown in the drawing, the inner ring 300 mounted on the wheel hub 200 is formed by plastically deforming the body side end of the wheel hub 200 or by combining a nut, etc. with the body side end of the wheel hub 200. It may be configured to be fixed to (200).
본 발명의 일 실시예에 따르면, 외륜(400)은 외주면에 휠베어링을 차체에 장착하는데 이용되는 차체측 장착 플랜지(410)를 구비하고, 내주면에 전동체(500)가 접촉하는 궤도면을 구비하도록 구성될 수 있다. 외륜(400)의 내주면에 형성된 궤도면(외측 궤도면)은 휠허브(200) 및/또는 내륜(300)에 형성된 궤도면(내측 궤도면)과 협력해 이들 궤도면 사이에 구름요소인 전동체(500)를 수용하여 지지하도록 구성될 수 있다.According to one embodiment of the present invention, the outer ring 400 has a vehicle body side mounting flange 410 used to mount a wheel bearing to the vehicle body on its outer peripheral surface, and has a raceway surface with which the rolling element 500 contacts its inner peripheral surface. It can be configured to do so. The raceway (outer raceway) formed on the inner peripheral surface of the outer ring 400 cooperates with the raceway (inner raceway) formed on the wheel hub 200 and/or the inner ring 300, and the rolling element, which is a rolling element, is between these raceway surfaces. It may be configured to accommodate and support (500).
본 발명의 일 실시예에 따르면, 전동체(500)는 휠베어링(100)의 회전요소[예컨대, 휠허브(200) 및/또는 내륜(300)]와 비회전요소[예컨대, 외륜(400)] 사이에 개재되어, 회전요소를 비회전요소에 대해 상대회전 가능하게 지지하는 기능을 수행할 수 있다.According to one embodiment of the present invention, the rolling element 500 includes a rotating element (e.g., wheel hub 200 and/or inner ring 300) and a non-rotating element (e.g., outer ring 400) of the wheel bearing 100. ] is interposed between them, and can perform the function of supporting the rotating element to enable relative rotation with respect to the non-rotating element.
다만, 도면에 도시된 실시형태의 경우에는 휠허브의 외주면 일부에 전동체를 지지하기 위한 일측 궤도면이 직접 형성되는 형태로 휠베어링이 구성되어 있으나, 본 발명의 일 실시예에 따른 휠베어링은 반드시 이러한 구조로 한정되어 형성되어야 하는 것은 아니고, 휠허브에 2개의 내륜을 장착해 2개의 내륜을 통해 전동체를 지지하도록 구성되는 등 다른 다양한 구조로 변형되어 실시되어도 무방하다.However, in the case of the embodiment shown in the drawing, the wheel bearing is configured in such a way that one raceway surface for supporting the rolling element is formed directly on a portion of the outer peripheral surface of the wheel hub. However, the wheel bearing according to one embodiment of the present invention is It is not necessarily limited to this structure, and may be modified into various other structures, such as mounting two inner rings on a wheel hub and supporting the rolling element through the two inner rings.
본 발명의 일 실시예에 따르면, 휠허브(200)의 차체측 단부는 등속조인트의 구름부재(미도시; 예컨대, 볼 부재)를 반경방향 외측에서 지지하는 기능(예컨대, 도 1에서 등속조인트의 외측부재가 수행하던 기능)을 수행하도록 구성될 수 있다. 이를 위해, 본 발명의 일 실시예에 따른 휠베어링(100)은 휠허브(200)의 차체측 단부에 축방향으로 함몰되어 형성된 수용공간(220)을 구비하고 수용공간(220)의 내주면에 반경방향 외측으로 함몰되어 형성된 리세스(230)를 구비해, 이러한 리세스(230)에 등속조인트의 구름부재가 수용되도록 구성될 수 있다.According to one embodiment of the present invention, the vehicle body side end of the wheel hub 200 has a function of supporting the rolling member (not shown; e.g., ball member) of the constant velocity joint from the radial outside (e.g., the constant velocity joint in FIG. 1). It may be configured to perform the function previously performed by the outer member. For this purpose, the wheel bearing 100 according to an embodiment of the present invention is provided with a receiving space 220 formed by being axially recessed at the end of the vehicle body side of the wheel hub 200, and has a radius on the inner peripheral surface of the receiving space 220. It may be provided with a recess 230 formed by being depressed outward in the direction, so that the rolling member of the constant velocity joint is accommodated in this recess 230.
본 발명의 일 실시예에 따르면, 휠허브(200)의 차체측 단부의 내주면(수용공간의 내주면)에 형성되는 리세스(230)는 등속조인트에 구비되는 구름부재의 수에 대응되는 수만큼 원주방향을 따라 하나 이상 구비되도록 구성될 수 있다.According to one embodiment of the present invention, the recess 230 formed on the inner peripheral surface (inner peripheral surface of the receiving space) of the vehicle body side end of the wheel hub 200 has a circumference equal to the number of rolling members provided in the constant velocity joint. It may be configured to be provided at least one along a direction.
이처럼, 본 발명의 일 실시예에 따른 휠베어링 조립체(100)는 휠허브(200)의 차체측 단부 내측으로 등속조인트의 구름요소가 삽입되어 장착되도록 구성되기 때문에, 등속조인트가 휠베어링 내측으로 삽입되어 결합되는 만큼 휠베어링 조립체의 길이가 짧아질 수 있고, 휠허브의 차체측 단부가 등속조인트의 외측부재의 기능을 함께 수행함에 따라 부품수가 감소되고 보다 콤팩트한 구조로 휠베어링 조립체가 형성될 수 있게 된다.In this way, since the wheel bearing assembly 100 according to an embodiment of the present invention is configured to be mounted by inserting the rolling element of the constant velocity joint inside the vehicle body side end of the wheel hub 200, the constant velocity joint is inserted into the wheel bearing. The length of the wheel bearing assembly can be shortened as it is combined, and as the body side end of the wheel hub performs the function of the outer member of the constant velocity joint, the number of parts is reduced and the wheel bearing assembly can be formed with a more compact structure. There will be.
본 발명의 일 실시예에 따르면, 등속조인트의 구름부재가 수용되는 수용공간(220)의 내주면은 열처리 경화부가 형성되어 등속조인트의 구름부재를 안정적으로 지지하도록 구성될 수 있다.According to one embodiment of the present invention, the inner peripheral surface of the receiving space 220 where the rolling member of the constant velocity joint is accommodated may be configured to stably support the rolling member of the constant velocity joint by forming a heat treatment hardening portion.
본 발명의 일 실시예에 따르면, 수용공간(220)의 내주면에 형성되는 열처리 경화부는 등속조인트의 구름부재가 안정적인 구름운동을 제공할 수 있도록 적어도 등속조인트의 구름부재가 접촉되는 부분을 모두 포함하여 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the heat treatment hardened portion formed on the inner peripheral surface of the receiving space 220 includes at least all the parts where the rolling member of the constant velocity joint is in contact so that the rolling member of the constant velocity joint can provide stable rolling motion. It can be configured to form.
예컨대, 수용공간(220)의 내주면에 형성되는 열처리 경화부는 등속조인트의 구름부재가 삽입되어 접촉하는 리세스(230)를 모두 포함하여 형성되도록 구성될 수 있다.For example, the heat treatment hardened portion formed on the inner peripheral surface of the receiving space 220 may be configured to include all of the recesses 230 into which the rolling member of the constant velocity joint is inserted and comes into contact.
본 발명의 일 실시예에 따르면, 리세스(230)는 수용공간 내에서 차체측 방향으로 연장하여 형성되도록 구성될 수 있다. 이러한 리세스(230)는 도 2 내지 도 4에 도시된 실시형태에서와 같이 축방향에 대해 소정의 각도(θ)로 경사진 방향으로 연장되어 형성되도록 구성될 수도 있고, 도 5 및 도 6에 도시된 실시형태에서와 같이 축방향에 평행한 방향으로 연장되어 형성되어 형성되도록 구성될 수도 있다.According to one embodiment of the present invention, the recess 230 may be configured to extend in the direction toward the vehicle body within the receiving space. This recess 230 may be formed to extend in an inclined direction at a predetermined angle θ with respect to the axial direction, as in the embodiment shown in FIGS. 2 to 4, and in FIGS. 5 and 6. As in the illustrated embodiment, it may be configured to extend in a direction parallel to the axial direction.
본 발명의 일 실시예에 따르면, 도 2 내지 도 4에 도시된 실시형태에서와 같이 리세스(230)가 축방향에 대해 경사진 방향으로 연장되어 형성되는 경우, 리세스(230)는 기준면(P)에 대해 좌우 대칭 형상으로 형성되도록 구성될 수 있다.According to one embodiment of the present invention, when the recess 230 is formed to extend in an inclined direction with respect to the axial direction as in the embodiment shown in FIGS. 2 to 4, the recess 230 has a reference surface ( It may be configured to be formed in a left-right symmetrical shape with respect to P).
예컨대, 도면에 도시된 실시형태의 경우에는 기준면(P)을 중심으로 좌우측으로 한 쌍의 리세스(230)가 대칭된 형상으로 형성되도록 구성되어 있다.For example, in the case of the embodiment shown in the drawing, a pair of recesses 230 are formed in a symmetrical shape on the left and right with the reference surface P as the center.
본 발명의 일 실시예에 따르면, 경사진 방향으로 연장되어 형성되는 리세스(230)는 바깥쪽으로 갈수록(휠측으로 이동할수록) 기준면(P)에 가까워지는 방향으로 경사지게 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the recess 230 extending in an inclined direction may be configured to be inclined in a direction that gets closer to the reference surface P as it goes outward (as it moves toward the wheel).
본 발명의 일 실시예에 따르면, 리세스(230)는 축방향 길이(L)가 휠허브(200)의 축방향 길이의 50% 이상이 되도록 길게 연장되어 형성되는 것이 바람직할 수 있다.According to one embodiment of the present invention, it may be desirable for the recess 230 to be formed to extend so that the axial length L is more than 50% of the axial length of the wheel hub 200.
이와 같이, 리세스(230)를 축방향으로 길게 연장하여 형성하게 되면, 리세스(230)가 형성되는 부분만큼 휠허브(200)의 소제가 제거될 수 있기 때문에 휠허브의 중량을 감소시킬 수 있고, 이로 인해 휠허브(200)의 대구경화에 따른 중량 증가 문제를 억제할 수 있게 된다.In this way, when the recess 230 is formed to extend long in the axial direction, the weight of the wheel hub can be reduced because the cleaning material of the wheel hub 200 can be removed as much as the portion where the recess 230 is formed. This makes it possible to suppress the problem of weight increase due to the large diameter of the wheel hub 200.
본 발명의 일 실시예에 따르면, 리세스(230)의 최소 반경방향 살두께[t; 예컨대, 내륜 안착면과 리세스 사이의 반경방향 두께]는 1mm 이상 4mm 이하의 범위로 형성되도록 구성되는 것이 바람직할 수 있다.According to one embodiment of the present invention, the minimum radial thickness of the recess 230 [t; For example, it may be desirable for the radial thickness between the inner ring seating surface and the recess to be formed in a range of 1 mm to 4 mm.
본 발명의 일 실시예에 따르면, 휠허브(200)의 차체측 단부에 구비되는 수용공간(220)에서 리세스(230)가 형성되지 않은 부분에는 반경방향 내측으로 연장되어 형성된 보강부(240)가 구비될 수 있다.According to an embodiment of the present invention, a reinforcement portion 240 extending radially inward is formed in a portion of the receiving space 220 provided at the end of the vehicle body side of the wheel hub 200 where the recess 230 is not formed. may be provided.
본 발명의 일 실시예에 따르면, 보강부(240)는 깊은 리세스(230) 형성에 의해 발생할 수 있는 강성 저하를 보완해, 리세스(230)의 축방향 길이를 휠허브(200)의 축방향 길이의 50% 이상으로 형성하는 경우에도 휠허브(200)의 강성을 기존과 동등한 수준으로 유지하는 기능을 수행할 수 있다.According to one embodiment of the present invention, the reinforcement portion 240 compensates for the decrease in rigidity that may occur due to the formation of the deep recess 230, and adjusts the axial length of the recess 230 to the axis of the wheel hub 200. Even when formed to more than 50% of the directional length, the function of maintaining the rigidity of the wheel hub 200 at the same level as before can be performed.
본 발명의 일 실시예에 따르면, 보강부(240)는 수용공간(220)에서 리세스(230)가 형성되지 않은 부분에 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the reinforcement portion 240 may be configured to be formed in a portion of the receiving space 220 where the recess 230 is not formed.
본 발명의 일 실시예에 따르면, 휠허브(200)의 중심부에는 격벽(250)이 구비되어 휠허브(200)의 차체측 단부에 형성되는 수용공간(220)이 외측으로 노출되는 것을 방지하도록 구성될 수 있으며, 휠허브(200)의 휠측 단부에는 파일럿부(260)가 구비되어 휠허브(200)에 휠을 장착할 때 휠의 장착을 안내하는 기능을 수행하도록 구성될 수 있다.According to one embodiment of the present invention, a partition wall 250 is provided at the center of the wheel hub 200 to prevent the receiving space 220 formed at the end of the vehicle body side of the wheel hub 200 from being exposed to the outside. A pilot unit 260 may be provided at the wheel side end of the wheel hub 200 and may be configured to guide the installation of the wheel when mounting the wheel on the wheel hub 200.
본 발명의 일 실시예에 따르면, 휠허브(200)의 차체측 단부에 구비되는 수용공간(220)의 리세스(230)는 휠베어링(100)이 조립된 상태에서 가공되어 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the recess 230 of the receiving space 220 provided at the vehicle body side end of the wheel hub 200 may be configured to be formed by processing the wheel bearing 100 in the assembled state. there is.
휠베어링(100)은 조립 과정, 특히 내륜(300)을 휠허브(200)의 외주면에 압입하여 장착한 다음 휠허브(200)의 차체측 단부를 소성 변형시키거나 너트 등을 체결해 내륜(300)을 고정하는 과정에서 변형이 발생할 위험이 있으며, 이와 같이 발생된 리세스(230)의 변형은 등속조인트를 통한 구동력 전달 시 소음 또는 진동의 원인이 될 수 있다.The wheel bearing 100 is installed during the assembly process, in particular, by press-fitting the inner ring 300 to the outer peripheral surface of the wheel hub 200, and then plastically deforming the body side end of the wheel hub 200 or tightening a nut, etc. to attach the inner ring 300. ), there is a risk of deformation occurring in the process of fixing the recess 230, and the deformation of the recess 230 thus generated may cause noise or vibration when transmitting driving force through the constant velocity joint.
본 발명의 일 실시예에 따른 휠베어링(100)은 휠베어링(100)을 조립한 이후에[예컨대, 휠허브(200)에 내륜(300)을 압입하여 장착한 다음 휠허브(200)의 차체측 단부를 소성 변형시키는 방식 등을 통해 내륜(300)을 고정시킨 이후에], 휠허브(200)의 차체측 단부에 구비된 수용공간(220)의 내주면에 리세스(230)를 형성하도록 구성될 수 있다.The wheel bearing 100 according to an embodiment of the present invention is assembled after assembling the wheel bearing 100 (for example, by press-fitting the inner ring 300 into the wheel hub 200 and then attaching it to the vehicle body of the wheel hub 200). [After fixing the inner ring 300 by plastically deforming the side end], a recess 230 is formed on the inner peripheral surface of the receiving space 220 provided at the body side end of the wheel hub 200. It can be.
본 발명의 일 실시예에 따르면, 리세스(230)는 연마 등의 방식을 통해 수용공간(220)의 내주면에 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the recess 230 may be formed on the inner peripheral surface of the receiving space 220 through a method such as polishing.
본 발명의 일 실시예에 따르면, 리세스(230)는 휠베어링(100)에 등속조인트가 조립될 때 기본 상태에서 등속조인트의 구름부재(예컨대, 볼부재)가 위치하는 축방향 위치를 나타내는 기준 가상면(A; 축방향에 수직한 가상면)에서, 원주방향으로 이격되어 구비된 복수의 리세스(230)의 곡률 중심과 휠베어링 조립체의 중심축 사이의 반경방향 거리의 최대값과 최소값 사이의 차이가 0.05mm 이하가 되도록 형성될 수 있다.According to one embodiment of the present invention, the recess 230 is a reference indicating the axial position where the rolling member (e.g., ball member) of the constant velocity joint is located in the basic state when the constant velocity joint is assembled to the wheel bearing 100. In the virtual plane (A; virtual plane perpendicular to the axial direction), between the maximum and minimum values of the radial distance between the center of curvature of the plurality of recesses 230 provided spaced apart in the circumferential direction and the central axis of the wheel bearing assembly. It can be formed so that the difference is 0.05 mm or less.
본 발명의 일 실시예에 따르면, 기준 가상면(A)에서 원주방향으로 인접한 좌측 리세스(230a)와 우측 리세스(230b)는 리세스의 곡률 중심에 의해 형성되는 가상원 직경(BCD; Ball Circle Diameter)의 차이는 0.1mm 이하가 되도록 형성될 수 있다.According to one embodiment of the present invention, the left recess 230a and the right recess 230b adjacent in the circumferential direction on the reference virtual surface A have a virtual circle diameter (BCD; Ball) formed by the center of curvature of the recess. The difference in Circle Diameter can be formed to be less than 0.1mm.
본 발명의 일 실시예에 따르면, 휠베어링(100)에 등속조인트가 조립된 상태에서 조향시 등속조인트가 위치할 수 있는 축방향 양단 위치를 나타내는 가상면(B, C)에서, 원주방향으로 이격되어 구비된 복수의 리세스(230)의 곡률 반경의 차이는 0.05mm 이하가 되도록 형성될 수 있다.According to one embodiment of the present invention, in a state in which the constant velocity joint is assembled to the wheel bearing 100, the constant velocity joint is spaced in the circumferential direction on the virtual planes (B, C) representing the axial end positions where the constant velocity joint can be located during steering. The difference in curvature radii of the plurality of recesses 230 may be formed to be 0.05 mm or less.
본 발명의 일 실시예에 따르면, 휠측 방향으로 이격된 위치의 가상면(B) 및 차체측 방향으로 이격된 위치의 가상면(C)은 기준 가상면(A)으로부터 축방향으로 5mm 내지 10mm 이격된 위치로 설정될 수 있다.According to one embodiment of the present invention, the virtual surface (B) at a position spaced apart in the wheel side direction and the virtual surface (C) at a position spaced apart in the vehicle body direction are spaced apart from the reference virtual surface (A) by 5 mm to 10 mm in the axial direction. It can be set to the desired location.
이상 본 발명을 구체적인 구성요소 등과 같은 특정 사항들과 한정된 실시예에 의해 설명하였으나, 상기 실시예는 본 발명의 보다 전반적인 이해를 돕기 위해서 제공된 것일 뿐, 본 발명이 이에 한정되는 것은 아니며, 본 발명이 속하는 기술분야에서 통상적인 지식을 가진 자라면 이러한 기재로부터 다양한 수정 및 변형을 꾀할 수 있다.Although the present invention has been described above with reference to specific details such as specific components and limited examples, the examples are provided only to facilitate a more general understanding of the present invention, and the present invention is not limited thereto. Anyone with ordinary knowledge in the relevant technical field can make various modifications and variations from this description.
따라서, 본 발명의 사상은 앞서 설명된 실시예에 국한되어 정해져서는 아니 되며, 후술하는 청구범위뿐만 아니라 이 청구범위와 균등하게 또는 등가적으로 변형된 모든 것들은 본 발명의 사상의 범주에 속한다고 할 것이다.Accordingly, the spirit of the present invention should not be limited to the embodiments described above, and all modifications equivalent or equivalent to the claims as well as the claims described below shall fall within the scope of the spirit of the present invention. will be.

Claims (15)

  1. 차량의 휠을 차체에 회전 가능하게 장착하여 지지하는 휠베어링(100)이며,It is a wheel bearing (100) that supports the wheels of a vehicle by rotatably mounted on the vehicle body,
    휠장착 플랜지(210)를 구비하는 휠허브(200)와;A wheel hub 200 having a wheel mounting flange 210;
    상기 휠허브(200)의 외주면에 압입되어 장착되는 하나 이상의 내륜(300)과;One or more inner rings 300 press-fitted and mounted on the outer peripheral surface of the wheel hub 200;
    차체측 장착 플랜지(410)를 구비하는 외륜(400)과;an outer ring 400 having a vehicle body side mounting flange 410;
    상기 휠허브(200)를 상기 외륜(400)에 대해 상대회전 가능하게 지지하는 복수의 전동체(500)를 포함하고,It includes a plurality of rolling elements 500 that support the wheel hub 200 to rotate relative to the outer ring 400,
    상기 휠허브(200)의 차체측 단부에는 등속조인트의 구름요소를 수용할 수 있는 수용공간(220)이 구비되고, An accommodating space 220 is provided at the vehicle body side end of the wheel hub 200 to accommodate the rolling element of the constant velocity joint,
    상기 수용공간(220)의 내주면에는 반경방향 외측으로 함몰되어 형성된 리세스(230)가 구비되고,The inner peripheral surface of the receiving space 220 is provided with a recess 230 formed by being recessed outward in the radial direction,
    상기 리세스(230)는 원주방향을 따라 이격되어 복수로 구비되고,The recesses 230 are provided in plural numbers and spaced apart along the circumferential direction,
    상기 리세스(230)의 축방향 길이(L)는 상기 휠허브(200)의 축방향 길이의 50% 이상이 되도록 형성되는,The axial length (L) of the recess 230 is formed to be more than 50% of the axial length of the wheel hub 200,
    차량용 휠베어링.Vehicle wheel bearings.
  2. 제1항에 있어서, According to paragraph 1,
    상기 리세스(230)와 상기 휠허브(200)의 외주면 사이의 반경방향 최소 두께는 1mm 내지 4mm 범위로 형성되는, The minimum radial thickness between the recess 230 and the outer peripheral surface of the wheel hub 200 is formed in the range of 1 mm to 4 mm,
    차량용 휠베어링.Vehicle wheel bearings.
  3. 제1항 또는 제2항에 있어서,According to claim 1 or 2,
    상기 수용공간(220)의 내주면에는 반경방향 내측으로 연장하여 형성된 보강부(240)가 구비되는, A reinforcement portion 240 formed extending radially inward is provided on the inner peripheral surface of the receiving space 220,
    차량용 휠베어링.Vehicle wheel bearings.
  4. 제3항에 있어서, According to paragraph 3,
    상기 보강부(240)는 상기 수용공간(220)에서 상기 리세스(230)가 형성되지 않은 부분에 구비되는,The reinforcement portion 240 is provided in a portion of the receiving space 220 where the recess 230 is not formed.
    차량용 휠베어링.Vehicle wheel bearings.
  5. 제1항 내지 제4항 중 어느 한 항에 있어서, According to any one of claims 1 to 4,
    상기 내륜(300)은 상기 휠허브(200)의 차체측 단부를 반경방향 외측으로 소성 변형시켜 형성된 포밍부에 의해 고정되도록 구성되는,The inner ring 300 is configured to be fixed by a forming portion formed by plastically deforming the vehicle body side end of the wheel hub 200 radially outward,
    차량용 휠베어링.Vehicle wheel bearings.
  6. 제5항에 있어서, According to clause 5,
    상기 리세스(230)는 상기 포밍부를 형성한 이후에 형성되도록 구성되는,The recess 230 is configured to be formed after forming the forming portion,
    차량용 휠베어링.Vehicle wheel bearings.
  7. 제1항 내지 제6항 중 어느 한 항에 있어서, According to any one of claims 1 to 6,
    상기 리세스(230)는 축방향에 평행한 방향으로 연장되어 형성되는, The recess 230 is formed to extend in a direction parallel to the axial direction.
    차량용 휠베어링.Vehicle wheel bearings.
  8. 제1항 내지 제6항 중 어느 한 항에 있어서, According to any one of claims 1 to 6,
    상기 리세스(230)는 축방향에 대해 경사진 방향으로 연장되어 형성되는, The recess 230 is formed to extend in an inclined direction with respect to the axial direction.
    차량용 휠베어링.Vehicle wheel bearings.
  9. 제8항에 있어서, According to clause 8,
    상기 리세스(230)는 기준면(P)에 대해 좌우로 대칭되어 형성되는,The recess 230 is formed to be symmetrical left and right with respect to the reference surface (P),
    차량용 휠베어링.Vehicle wheel bearings.
  10. 제9항에 있어서, According to clause 9,
    상기 리세스(230)는 휠측으로 이동할수록 기준면(P)에 가까워지는 방향으로 경사지게 연장되어 형성되는,The recess 230 is formed to extend obliquely in a direction closer to the reference surface (P) as it moves toward the wheel.
    차량용 휠베어링.Vehicle wheel bearings.
  11. 제10항에 있어서, According to clause 10,
    상기 리세스(230)는 기준면(P)을 중심으로 좌우 양측으로 2개 이상씩 구비되는,The recesses 230 are provided in two or more on both left and right sides centered on the reference surface (P),
    차량용 휠베어링.Vehicle wheel bearings.
  12. 제1항 내지 제11항 중 어느 한 항에 있어서,According to any one of claims 1 to 11,
    상기 휠베어링(100)에 등속조인트가 조립될 때 기본 상태에서 등속조인트의 구름부재가 위치하는 축방향 위치를 나타내는 기준 가상면(A)에서, 원주방향으로 이격되어 구비된 복수의 리세스(230)의 곡률 중심과 휠베어링 조립체의 중심축 사이의 반경방향 거리의 최대값과 최소값 사이의 차이는 0.05mm 이하가 되도록 형성되는,When the constant velocity joint is assembled to the wheel bearing 100, a plurality of recesses 230 are provided spaced apart in the circumferential direction on the reference virtual plane A indicating the axial position where the rolling member of the constant velocity joint is located in the basic state. ) is formed so that the difference between the maximum and minimum values of the radial distance between the center of curvature and the central axis of the wheel bearing assembly is 0.05 mm or less,
    휠베어링 조립체.Wheel bearing assembly.
  13. 제1항 내지 제12항 중 어느 한 항에 있어서, According to any one of claims 1 to 12,
    상기 휠베어링(100)에 등속조인트가 조립될 때 기본 상태에서 등속조인트의 구름부재가 위치하는 축방향 위치를 나타내는 기준 가상면(A)에서, 원주방향으로 인접한 좌측 리세스(230a)와 우측 리세스(230b)는 리세스의 곡률 중심에 의해 형성되는 가상원 직경의 차이가 0.1mm 이하가 되도록 형성되는,When the constant velocity joint is assembled to the wheel bearing 100, in the reference virtual plane (A) indicating the axial position where the rolling member of the constant velocity joint is located in the basic state, the left recess 230a and the right recess adjacent in the circumferential direction are The recess 230b is formed so that the difference in the diameter of the virtual circle formed by the center of curvature of the recess is 0.1 mm or less,
    차량용 휠베어링.Vehicle wheel bearings.
  14. 제1항 내지 제13항 중 어느 한 항에 있어서, According to any one of claims 1 to 13,
    상기 휠베어링(100)에 등속조인트가 조립된 상태에서 조향시 등속조인트가 위치할 수 있는 축방향 양단 위치를 나타내는 가상면(B, C)에서, 원주방향으로 이격되어 구비된 복수의 리세스(230)의 곡률 반경의 차이는 0.05mm 이하가 되도록 형성되는, In a state in which the constant velocity joint is assembled to the wheel bearing 100, a plurality of recesses ( 230) is formed so that the difference in radius of curvature is 0.05 mm or less,
    차량용 휠베어링.Vehicle wheel bearings.
  15. 제14항에 있어서, According to clause 14,
    상기 가상면(B, C)은 상기 기준 가상면(A)으로부터 5mm 내지 10mm 축방향으로 이격된 위치에 형성되는,The virtual surfaces (B, C) are formed at a position spaced 5 mm to 10 mm axially from the reference virtual surface (A),
    차량용 휠베어링.Vehicle wheel bearings.
PCT/KR2023/008328 2022-06-21 2023-06-15 Wheel bearing for vehicle WO2023249332A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2022-0075864 2022-06-21
KR1020220075864A KR20230174661A (en) 2022-06-21 2022-06-21 Wheel bearing for vehicle

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WO2023249332A1 true WO2023249332A1 (en) 2023-12-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008094156A (en) * 2006-10-06 2008-04-24 Ntn Corp Bearing device for driving wheel
KR101871992B1 (en) * 2016-10-21 2018-06-27 현대위아(주) Hub built-in type constant velocity joint apparatus
JP6690415B2 (en) * 2016-06-06 2020-04-28 株式会社ジェイテクト Constant velocity joint and manufacturing method thereof
KR102199528B1 (en) * 2019-04-19 2021-01-07 현대위아 주식회사 Vehicle drive axle with anti-strain capability
US20210231168A1 (en) * 2018-04-27 2021-07-29 Iljin Global Co.,Ltd Wheel bearing assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008094156A (en) * 2006-10-06 2008-04-24 Ntn Corp Bearing device for driving wheel
JP6690415B2 (en) * 2016-06-06 2020-04-28 株式会社ジェイテクト Constant velocity joint and manufacturing method thereof
KR101871992B1 (en) * 2016-10-21 2018-06-27 현대위아(주) Hub built-in type constant velocity joint apparatus
US20210231168A1 (en) * 2018-04-27 2021-07-29 Iljin Global Co.,Ltd Wheel bearing assembly
KR102199528B1 (en) * 2019-04-19 2021-01-07 현대위아 주식회사 Vehicle drive axle with anti-strain capability

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