WO2024019563A1 - Vehicle wheel bearing - Google Patents

Vehicle wheel bearing Download PDF

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Publication number
WO2024019563A1
WO2024019563A1 PCT/KR2023/010510 KR2023010510W WO2024019563A1 WO 2024019563 A1 WO2024019563 A1 WO 2024019563A1 KR 2023010510 W KR2023010510 W KR 2023010510W WO 2024019563 A1 WO2024019563 A1 WO 2024019563A1
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WO
WIPO (PCT)
Prior art keywords
wheel
wheel hub
vehicle
peripheral surface
vehicle body
Prior art date
Application number
PCT/KR2023/010510
Other languages
French (fr)
Korean (ko)
Inventor
금동호
이만철
이형주
조선기
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 WO2024019563A1 publication Critical patent/WO2024019563A1/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 present invention is a wheel bearing of the fourth generation structure, which is configured to insert the rolling element of the constant velocity joint into the inside of the wheel hub so that the body side end of the wheel hub performs the function of the outer member of the constant velocity joint, making it easy to set the gap before preload.
  • the purpose is to provide a wheel bearing configured to perform smoothly.
  • a representative configuration of the present invention to achieve the above-described object is as follows.
  • a wheel bearing for a vehicle that supports a vehicle wheel by rotatably mounting it on a vehicle body.
  • a wheel bearing for a vehicle 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 and the inner ring so that they can rotate relative to the outer ring.
  • an accommodating space capable of accommodating the rolling element of the constant velocity joint is provided at the end of the vehicle body of the wheel hub, and a recess formed by recessing radially outward is provided on the inner peripheral surface of the accommodating space,
  • the preload clearance of the wheel bearing can be set in the range of -0.050 to -0.005mm.
  • the preload clearance of the wheel bearing may be set to the same range as the final clearance target.
  • the amount of change in clearance of the wheel bearing may be set to 30% or less of the initial clearance.
  • the inner ring may be configured to be press-fitted and coupled to the outer peripheral surface of the wheel hub with an interference amount in the range of ⁇ 0.020 to ⁇ 0.080 mm.
  • 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 inner ring may be configured to be fixed by coupling a nut to the end of the wheel hub on the vehicle body side.
  • a heat treatment hardened portion is formed on the inner peripheral surface of the receiving space, and the heat treatment hardened portion may be formed to include all of the recesses formed in the receiving space.
  • a heat treatment hardened portion may be formed on all or part of the outer peripheral surface of the wheel hub.
  • 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 for a vehicle 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 the occurrence of noise or vibration when transmitting driving force can be suppressed.
  • the rolling member e.g., ball member
  • the wheel bearing for a vehicle is a 4th generation structure configured to insert the rolling element of the constant velocity joint into the inside of the wheel hub so that the vehicle body side end of the wheel hub also performs the function of the outer member of the constant velocity joint.
  • the clearance range and the amount of press-fit interference between the wheel hub and the inner ring are controlled to a predetermined desired range so that the preload gap can be easily set, so that the preload gap can be more easily set.
  • FIG. 1 exemplarily shows a drive shaft wheel bearing (the so-called wheel bearing of the third generation structure).
  • Figure 2 exemplarily shows the structure of a wheel bearing for a vehicle according to an embodiment of the present invention.
  • Figure 3 exemplarily shows the structure of a wheel bearing for a vehicle according to another embodiment of the present invention.
  • a wheel bearing 100 that supports the wheels of a vehicle by rotatably mounting them on the vehicle body, and a wheel hub 200 including a wheel mounting flange 210;
  • One or more inner rings 300 press-fitted and mounted on the outer peripheral surface of the wheel hub 200;
  • an outer ring 400 having a vehicle body side mounting flange 410;
  • It includes a plurality of rolling elements 500 that support the wheel hub 200 and the inner ring 300 so that they can rotate relative to the outer ring 400, and a rolling element of a constant velocity joint is provided at the vehicle body side end of the wheel hub 200.
  • An accommodating space 230 is provided, and a recess 240 is formed on the inner peripheral surface of the accommodating space 230 by being recessed radially outward, and the preload gap of the wheel bearing 100 is -0.050 to -0.050.
  • Wheel bearings for vehicles set in the range of -0.005mm.
  • 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 is shown as an example.
  • the vehicle wheel bearing 100 according to an embodiment of the present invention has rotating elements (e.g., wheel hub 200 and inner ring 300) that are non-rotating elements, similar to a typical vehicle wheel bearing.
  • the outer ring 400 is coupled to the plurality of rolling elements 500 to perform the function of rotatably supporting the wheels of the vehicle with respect to the vehicle body, and is accommodated at the vehicle body side end of the wheel hub 200.
  • a space 230 may be formed so that the rolling member (eg, ball-shaped rolling element) of the constant velocity joint can be inserted and mounted into the wheel hub 200.
  • 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.
  • the inner ring 300 may be configured to be mounted on one or more formed on the outer peripheral surface of the wheel hub 200, and the raceway surface (inner raceway surface) of the rolling element is on the outer peripheral surface of the inner ring 200. It may be configured to support the rolling element 500 in the radial direction.
  • the inner ring 300 mounted on the wheel hub 200 is supported/fixed by the forming portion 220 formed by plastically deforming the body side end of the wheel hub 200 outward in the radial direction.
  • it can be configured to be supported/fixed to the wheel hub 200 by combining a nut 600, etc., at the end of the wheel hub 200 on the vehicle body side.
  • 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 230 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 230. It may be provided with a recess 240 having a structure that is recessed outward in the direction, so that the rolling member of the constant velocity joint can be accommodated in this recess 240.
  • the recess 240 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 230 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 230 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 230 may be configured to include all of the recesses 240 into which the rolling member of the constant velocity joint is inserted and comes into contact.
  • the wheel hub 200 may be configured to have a heat treatment hardening portion on all or part of the outer peripheral surface (eg, rolling element raceway surface, inner ring mounting portion, etc.).
  • the heat treatment hardening portion formed on the outer peripheral surface of the wheel hub 200 starts at a position on the wheel side compared to the rolling element raceway surface formed on the outer peripheral surface of the wheel hub 200 to provide a stable rolling element raceway surface and/or inner ring press-fit surface. It may be configured to extend to a portion before the vehicle body side end of the inner ring 300 that is press-fitted into the wheel hub 200.
  • the heat treatment hardening portion formed on the inner and outer peripheral surfaces of the wheel hub 200 can be performed through various known heat treatment methods such as high-frequency quenching and pre-hardening heat treatment, and can provide a stable raceway surface and/ Alternatively, it may be formed to have a predetermined hardness (eg, Hv 500 or more) to provide a mounting surface.
  • a predetermined hardness eg, Hv 500 or more
  • the vehicle wheel bearing 100 is formed by plastically deforming the vehicle body-side end of the wheel hub 200 to form the forming portion 220 or by attaching a nut 600 to the vehicle body-side end of the wheel hub 200. ), etc. may be configured to apply a preload in the process of fixing the inner ring 300.
  • the wheel bearing 100 is preloaded (plastically deforming the vehicle body side end of the wheel hub 200 to form the forming portion 220 or attaching a nut 600 to the wheel hub 200).
  • the gap may be configured to be set to a range similar to the final gap target.
  • the preload clearance of the wheel bearing 100 may be configured to be set in the range of -0.050 to -0.005 mm, and the clearance change amount may be set to be 30% or less of the initial clearance. You can.
  • the inner ring 300 may be configured to be press-fitted and coupled to the outer peripheral surface of the wheel hub 200 with a predetermined amount of interference within a predetermined range for stable mounting and smooth preload formation.
  • the inner ring 300 may be configured to be press-fitted and coupled to the outer peripheral surface of the wheel hub 200 with an interference amount in the range of ⁇ 0.020 to ⁇ 0.080 mm.
  • the wheel bearing according to an embodiment of the present invention is a 4th generation structure configured to insert the rolling element of the constant velocity joint 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.
  • the preload clearance range, the amount of press-fit interference between the wheel hub and the inner ring, etc. are configured to be controlled to a predetermined range, making it possible to more easily set the preload gap during the manufacturing process of the wheel bearing.
  • the wheel bearing for a vehicle 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 the occurrence of noise or vibration when transmitting driving force can be suppressed.
  • the rolling member e.g., ball member
  • the wheel bearing for a vehicle is a 4th generation structure configured to insert the rolling element of the constant velocity joint into the inside of the wheel hub so that the vehicle body side end of the wheel hub also performs the function of the outer member of the constant velocity joint.
  • the clearance range, the amount of press-fit interference between the wheel hub and the inner ring, etc. are controlled to a predetermined desirable range so that the preload gap setting can be easily performed, making it possible to more easily perform the preload gap setting.

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

Abstract

One embodiment of the present invention provides a vehicle wheel bearing which rotatably mounts a vehicle wheel to a vehicle body and supports the vehicle wheel. A vehicle wheel bearing according to one embodiment of the present invention may comprise: a wheel hub having a wheel mounting flange; one or more inner races press-fitted to be mounted on the outer peripheral surface of the wheel hub; an outer race having a vehicle body side mounting flange; and a plurality of rolling bodies for supporting the wheel hub and the inner races such that the wheel hub and the inner races are relatively rotatable with respect to the outer race. According to one embodiment of the present invention, a receiving space capable of receiving a rolling element of a constant velocity joint may be provided at the body side end of the wheel hub, a recess formed by being depressed radially outward may be provided in the inner peripheral surface of the receiving space, and the preload clearance of the wheel bearing may be set in the range of -0.050 to -0.005mm.

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)
본 발명은 등속조인트의 구름요소를 휠허브의 내측으로 삽입시켜 휠허브의 차체측 단부가 등속조인트의 외측부재의 기능을 함께 수행하도록 구성된 4세대 구조의 휠베어링에 있어서, 예압전 틈새 설정을 용이하게 수행할 수 있도록 구성된 휠베어링을 제공하는 것을 목적으로 한다.The present invention is a wheel bearing of the fourth generation structure, which is configured to insert the rolling element of the constant velocity joint into the inside of the wheel hub so that the body side end of the wheel hub performs the function of the outer member of the constant velocity joint, making it easy to set the gap before preload. The purpose is to provide a wheel bearing configured to perform smoothly.
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 차량용 휠베어링이 제공된다. 본 발명의 일 실시예에 따른 차량용 휠베어링은 휠장착 플랜지를 구비하는 휠허브와; 휠허브의 외주면에 압입되어 장착되는 하나 이상의 내륜과; 차체측 장착 플랜지를 구비하는 외륜과; 휠허브 및 내륜을 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 구비되고, 휠베어링의 예압전 틈새는 -0.050 내지 -0.005mm의 범위로 설정될 수 있다.According to one embodiment of the present invention, a wheel bearing for a vehicle is provided that supports a vehicle wheel by rotatably mounting it on a vehicle body. A wheel bearing for a vehicle 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 and the inner ring so that they 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 is provided at the end of the vehicle body of the wheel hub, and a recess formed by recessing radially outward is provided on the inner peripheral surface of the accommodating space, The preload clearance of the wheel bearing can be set in the range of -0.050 to -0.005mm.
본 발명의 일 실시예에 따르면, 휠베어링의 예압전 틈새는 최종 틈새 타겟과 동일한 범위로 설정될 수 있다.According to one embodiment of the present invention, the preload clearance of the wheel bearing may be set to the same range as the final clearance target.
본 발명의 일 실시예에 따르면, 휠베어링의 틈새 변화량은 초기 틈새의 30% 이하로 설정될 수 있다.According to one embodiment of the present invention, the amount of change in clearance of the wheel bearing may be set to 30% or less of the initial clearance.
본 발명의 일 실시예에 따르면, 내륜은 Φ0.020 내지 Φ0.080mm 범위의 간섭량으로 휠허브의 외주면에 압입되어 결합되도록 구성될 수 있다.According to one embodiment of the present invention, the inner ring may be configured to be press-fitted and coupled to the outer peripheral surface of the wheel hub with an interference amount in the range of Φ0.020 to Φ0.080 mm.
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, 내륜은 휠허브의 차체측 단부에 너트를 결합해 고정되도록 구성될 수 있다.According to one embodiment of the present invention, the inner ring may be configured to be fixed by coupling a nut to the end of the wheel hub on the vehicle body side.
본 발명의 일 실시예에 따르면, 수용공간의 내주면에는 열처리 경화부가 형성되고, 열처리 경화부는 수용공간에 형성된 리세스를 모두 포함하도록 형성될 수 있다.According to one embodiment of the present invention, a heat treatment hardened portion is formed on the inner peripheral surface of the receiving space, and the heat treatment hardened portion may be formed to include all of the recesses formed in the receiving space.
본 발명의 일 실시예에 따르면, 휠허브의 외주면 전부 또는 일부에는 열처리 경화부가 형성될 수 있다.According to one embodiment of the present invention, a heat treatment hardened portion may be formed on all or part of the outer peripheral surface of the wheel hub.
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 차량용 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 for a vehicle 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 the occurrence of noise or vibration when transmitting driving force can be suppressed.
또한, 본 발명의 일 실시예에 따른 차량용 휠베어링은 등속조인트의 구름요소를 휠허브의 내측으로 삽입시켜 휠허브의 차체측 단부가 등속조인트의 외측부재의 기능을 함께 수행하도록 구성된 4세대 구조의 휠베어링에 있어서, 예압전 틈새 설정을 용이하게 수행할 수 있도록 틈새 범위, 휠허브와 내륜의 압입 간섭량 등을 소정의 바람직한 범위로 제어되어, 예압전 틈새 설정을 보다 용이하게 수행할 수 있게 된다.In addition, the wheel bearing for a vehicle according to an embodiment of the present invention is a 4th generation structure configured to insert the rolling element of the constant velocity joint into the inside of the wheel hub so that the vehicle body side end of the wheel hub also performs the function of the outer member of the constant velocity joint. In wheel bearings, the clearance range and the amount of press-fit interference between the wheel hub and the inner ring are controlled to a predetermined desired range so that the preload gap can be easily set, so that the preload gap can be more easily set.
도 1은 구동축 휠베어링(소위, 3세대 구조의 휠베어링)을 예시적으로 도시한다.1 exemplarily shows a drive shaft wheel bearing (the so-called wheel bearing of the third generation structure).
도 2는 본 발명의 일 실시예에 따른 차량용 휠베어링의 구조를 예시적으로 도시한다. Figure 2 exemplarily shows the structure of a wheel bearing for a vehicle according to an embodiment of the present invention.
도 3는 본 발명의 다른 실시예에 따른 차량용 휠베어링의 구조를 예시적으로 도시한다.Figure 3 exemplarily shows the structure of a wheel bearing for a vehicle according to another embodiment of the present invention.
차량의 휠을 차체에 회전 가능하게 장착하여 지지하는 휠베어링(100)이며, 휠장착 플랜지(210)를 구비하는 휠허브(200)와; 휠허브(200)의 외주면에 압입되어 장착되는 하나 이상의 내륜(300)과; 차체측 장착 플랜지(410)를 구비하는 외륜(400)과; 휠허브(200) 및 내륜(300)을 외륜(400)에 대해 상대회전 가능하게 지지하는 복수의 전동체(500)를 포함하고, 휠허브(200)의 차체측 단부에는 등속조인트의 구름요소를 수용할 수 있는 수용공간(230)이 구비되고, 수용공간(230)의 내주면에는 반경방향 외측으로 함몰되어 형성된 리세스(240)가 구비되고, 휠베어링(100)의 예압전 틈새는 -0.050 내지 -0.005mm의 범위로 설정되는, 차량용 휠베어링.A wheel bearing 100 that supports the wheels of a vehicle by rotatably mounting them on the vehicle body, and a wheel hub 200 including a wheel mounting flange 210; One or more inner rings 300 press-fitted and mounted on the outer peripheral surface of the wheel hub 200; an outer ring 400 having a vehicle body side mounting flange 410; It includes a plurality of rolling elements 500 that support the wheel hub 200 and the inner ring 300 so that they can rotate relative to the outer ring 400, and a rolling element of a constant velocity joint is provided at the vehicle body side end of the wheel hub 200. An accommodating space 230 is provided, and a recess 240 is formed on the inner peripheral surface of the accommodating space 230 by being recessed radially outward, and the preload gap of the wheel bearing 100 is -0.050 to -0.050. Wheel bearings for vehicles, set in the range of -0.005mm.
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 및 도 3을 참조하면, 본 발명의 일 실시예에 따른 차량용 휠베어링(100)이 예시적으로 도시되어 있다. 도면에 도시된 바와 같이, 본 발명의 일 실시예에 따른 차량용 휠베어링(100)은 통상의 차량용 휠베어링과 유사하게 회전요소[예컨대, 휠허브(200) 및 내륜(300)]이 비회전요소[예컨대, 외륜(400)]에 복수의 전동체(500)를 통해 결합되어 차량의 휠을 차체에 대해 회전 가능하게 지지하는 기능을 수행할 수 있으며, 휠허브(200)의 차체측 단부에는 수용공간(230)이 형성되어 등속조인트의 구름부재(예컨대, 볼 형상의 전동체)를 휠허브(200) 내로 삽입하여 장착하도록 구성될 수 있다.Referring to Figures 2 and 3, 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 vehicle wheel bearing 100 according to an embodiment of the present invention has rotating elements (e.g., wheel hub 200 and inner ring 300) that are non-rotating elements, similar to a typical vehicle wheel bearing. [For example, the outer ring 400] is coupled to the plurality of rolling elements 500 to perform the function of rotatably supporting the wheels of the vehicle with respect to the vehicle body, and is accommodated at the vehicle body side end of the wheel hub 200. A space 230 may be formed so that the rolling member (eg, ball-shaped rolling element) of the constant velocity joint can be inserted and mounted into the wheel hub 200.
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 형성된 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 도 2에 도시된 바와 같이 휠허브(200)의 차체측 단부를 반경방향 외측으로 소성 변형시켜 형성된 포밍부(220)에 의해 지지/고정되거나 도 3에 도시된 바와 같이 휠허브(200)의 차체측 단부에 너트(600) 등을 결합해 휠허브(200)에 지지/고정되도록 구성될 수 있다.According to one embodiment of the present invention, the inner ring 300 may be configured to be mounted on one or more formed on the outer peripheral surface of the wheel hub 200, and the raceway surface (inner raceway surface) of the rolling element is on the outer peripheral surface of the inner ring 200. It may be configured to support the rolling element 500 in the radial direction. As shown in FIG. 2, the inner ring 300 mounted on the wheel hub 200 is supported/fixed by the forming portion 220 formed by plastically deforming the body side end of the wheel hub 200 outward in the radial direction. As shown in Figure 3, it can be configured to be supported/fixed to the wheel hub 200 by combining a nut 600, etc., at the end of the wheel hub 200 on the vehicle body side.
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(230)을 구비하고 수용공간(230)의 내주면에 반경방향 외측으로 함몰된 구조의 리세스(240)를 구비해, 이러한 리세스(240)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 230 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 230. It may be provided with a recess 240 having a structure that is recessed outward in the direction, so that the rolling member of the constant velocity joint can be accommodated in this recess 240.
본 발명의 일 실시예에 따르면, 휠허브(200)의 차체측 단부의 내주면(수용공간의 내주면)에 형성되는 리세스(240)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 240 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(230)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 230 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(230)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 230 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(230)의 내주면에 형성되는 열처리 경화부는 등속조인트의 구름부재가 삽입되어 접촉하는 리세스(240)를 모두 포함하여 형성되도록 구성될 수 있다.For example, the heat treatment hardened portion formed on the inner peripheral surface of the receiving space 230 may be configured to include all of the recesses 240 into which the rolling member of the constant velocity joint is inserted and comes into contact.
본 발명의 일 실시예에 따르면, 휠허브(200)는 외주면의 전부 또는 일부(예컨대, 전동체 궤도면, 내륜 장착부 등)에도 열처리 경화부가 구비되도록 구성될 수 있다. 예컨대, 휠허브(200)의 외주면에 형성되는 열처리 경화부는 안정적인 전동체 궤도면 및/또는 내륜 압입면을 제공할 수 있도록 휠허브(200)의 외주면에 형성되는 전동체 궤도면보다 휠측의 위치에서 시작해 휠허브(200)에 압입되는 내륜(300)의 차체측 단부 이전 부분까지 연장되어 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the wheel hub 200 may be configured to have a heat treatment hardening portion on all or part of the outer peripheral surface (eg, rolling element raceway surface, inner ring mounting portion, etc.). For example, the heat treatment hardening portion formed on the outer peripheral surface of the wheel hub 200 starts at a position on the wheel side compared to the rolling element raceway surface formed on the outer peripheral surface of the wheel hub 200 to provide a stable rolling element raceway surface and/or inner ring press-fit surface. It may be configured to extend to a portion before the vehicle body side end of the inner ring 300 that is press-fitted into the wheel hub 200.
본 발명의 일 실시예에 따르면, 휠허브(200)의 내주면과 외주면에 형성되는 열처리 경화부는 고주파 퀜칭(Quenching), 전경화 열처리 등 다양한 공지의 열처리 방법을 통해 수행될 수 있으며, 안정적인 궤도면 및/또는 장착면을 제공할 수 있도록 소정의(예컨대, Hv 500 이상의) 경도를 갖도록 형성될 수 있다.According to one embodiment of the present invention, the heat treatment hardening portion formed on the inner and outer peripheral surfaces of the wheel hub 200 can be performed through various known heat treatment methods such as high-frequency quenching and pre-hardening heat treatment, and can provide a stable raceway surface and/ Alternatively, it may be formed to have a predetermined hardness (eg, Hv 500 or more) to provide a mounting surface.
본 발명의 일 실시예에 따르면, 차량용 휠베어링(100)은 휠허브(200)의 차체측 단부를 소성 변형시켜 포밍부(220)를 형성하거나 휠허브(200)의 차체측 단부에 너트(600) 등을 결합해 내륜(300)을 고정하는 과정에서 예압이 인가되도록 구성될 수 있다.According to one embodiment of the present invention, the vehicle wheel bearing 100 is formed by plastically deforming the vehicle body-side end of the wheel hub 200 to form the forming portion 220 or by attaching a nut 600 to the vehicle body-side end of the wheel hub 200. ), etc. may be configured to apply a preload in the process of fixing the inner ring 300.
본 발명의 일 실시예에 따르면, 휠베어링(100)은 예압전[휠허브(200)의 차체측 단부를 소성 변형시켜 포밍부(220)를 형성하거나 휠허브(200)에 너트(600)를 결합해 내륜(300)을 고정시키기 이전] 틈새가 최종 틈새 타겟과 유사한 범위로 설정되도록 구성될 수 있다.According to one embodiment of the present invention, the wheel bearing 100 is preloaded (plastically deforming the vehicle body side end of the wheel hub 200 to form the forming portion 220 or attaching a nut 600 to the wheel hub 200). [Before combining and fixing the inner ring 300] The gap may be configured to be set to a range similar to the final gap target.
예컨대, 본 발명의 일 실시예에 따르면, 휠베어링(100)의 예압전 틈새는 -0.050 내지 -0.005mm의 범위로 설정되도록 구성될 수 있으며, 틈새 변화량은 초기 틈새의 30% 이하가 되도록 설정될 수 있다.For example, according to one embodiment of the present invention, the preload clearance of the wheel bearing 100 may be configured to be set in the range of -0.050 to -0.005 mm, and the clearance change amount may be set to be 30% or less of the initial clearance. You can.
본 발명의 일 실시예에 따르면, 내륜(300)은 안정적인 장착 및 원활한 예압 형성을 위해 휠허브(200)의 외주면에 미리 정해진 범위의 소정의 간섭량으로 압입되어 결합되도록 구성될 수 있다.According to one embodiment of the present invention, the inner ring 300 may be configured to be press-fitted and coupled to the outer peripheral surface of the wheel hub 200 with a predetermined amount of interference within a predetermined range for stable mounting and smooth preload formation.
예컨대, 본 발명의 일 실시예에 따르면, 내륜(300)은 휠허브(200)의 외주면에 Φ0.020 내지 Φ0.080mm 범위의 간섭량으로 압입되어 결합되도록 구성될 수 있다.For example, according to one embodiment of the present invention, the inner ring 300 may be configured to be press-fitted and coupled to the outer peripheral surface of the wheel hub 200 with an interference amount in the range of Φ0.020 to Φ0.080 mm.
이와 같이, 본 발명의 일 실시예에 따른 휠베어링은 등속조인트의 구름요소를 휠허브의 내측으로 삽입시켜 휠허브의 차체측 단부가 등속조인트의 외측부재의 기능을 함께 수행하도록 구성된 4세대 구조의 휠베어링에 있어서, 예압전 틈새 범위, 휠허브와 내륜의 압입 간섭량 등이 소정의 범위로 제어되도록 구성되어 있어, 휠베어링의 제조 과정에서 예압전 틈새 설정을 보다 용이하게 수행할 수 있게 된다.As such, the wheel bearing according to an embodiment of the present invention is a 4th generation structure configured to insert the rolling element of the constant velocity joint 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. In wheel bearings, the preload clearance range, the amount of press-fit interference between the wheel hub and the inner ring, etc. are configured to be controlled to a predetermined range, making it possible to more easily set the preload gap during the manufacturing process of the wheel bearing.
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 transformations 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 to 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.
[부호의 설명][Explanation of symbols]
100: 휠베어링100: wheel bearing
200: 휠허브200: wheel hub
210: 휠장착 플랜지210: Wheel mounting flange
220: 포밍부220: Forming unit
230: 수용공간230: Accommodation space
240: 리세스240: recess
300: 내륜300: inner ring
400: 외륜400: paddle
410: 차체측 장착 플랜지410: Body side mounting flange
500: 전동체500: rolling element
본 발명의 일 실시예에 따른 차량용 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 for a vehicle 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 the occurrence of noise or vibration when transmitting driving force can be suppressed.
또한, 본 발명의 일 실시예에 따른 차량용 휠베어링은 등속조인트의 구름요소를 휠허브의 내측으로 삽입시켜 휠허브의 차체측 단부가 등속조인트의 외측부재의 기능을 함께 수행하도록 구성된 4세대 구조의 휠베어링에 있어서, 예압전 틈새 설정을 용이하게 수행할 수 있도록 틈새 범위, 휠허브와 내륜의 압입 간섭량 등을 소정의 바람직한 범위로 제어되어, 예압전 틈새 설정을 보다 용이하게 수행할 수 있게 된다.In addition, the wheel bearing for a vehicle according to an embodiment of the present invention is a 4th generation structure configured to insert the rolling element of the constant velocity joint into the inside of the wheel hub so that the vehicle body side end of the wheel hub also performs the function of the outer member of the constant velocity joint. In wheel bearings, the clearance range, the amount of press-fit interference between the wheel hub and the inner ring, etc. are controlled to a predetermined desirable range so that the preload gap setting can be easily performed, making it possible to more easily perform the preload gap setting.

Claims (8)

  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) 및 상기 내륜(300)을 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 and the inner ring 300 to rotate relative to the outer ring 400,
    상기 휠허브(200)의 차체측 단부에는 등속조인트의 구름요소를 수용할 수 있는 수용공간(230)이 구비되고, An accommodating space 230 for accommodating the rolling element of the constant velocity joint is provided at the vehicle body side end of the wheel hub 200,
    상기 수용공간(230)의 내주면에는 반경방향 외측으로 함몰되어 형성된 리세스(240)가 구비되고,The inner peripheral surface of the receiving space 230 is provided with a recess 240 formed by being recessed radially outward,
    상기 휠베어링(100)의 예압전 틈새는 -0.050 내지 -0.005mm의 범위로 설정되는,The preload gap of the wheel bearing 100 is set in the range of -0.050 to -0.005mm,
    차량용 휠베어링.Vehicle wheel bearings.
  2. 제1항에 있어서, According to paragraph 1,
    상기 휠베어링(100)의 예압전 틈새는 최종 틈새 타겟과 동일한 범위로 설정되는, The preload gap of the wheel bearing 100 is set to the same range as the final gap target,
    차량용 휠베어링.Vehicle wheel bearings.
  3. 제1항에 있어서,According to paragraph 1,
    상기 휠베어링(100)의 틈새 변화량은 초기 틈새의 30% 이하로 설정되는, The clearance change amount of the wheel bearing 100 is set to 30% or less of the initial clearance,
    차량용 휠베어링.Vehicle wheel bearings.
  4. 제1항에 있어서, According to paragraph 1,
    상기 내륜(300)은 Φ0.020 내지 Φ0.080mm 범위의 간섭량으로 상기 휠허브(200)의 외주면에 압입되어 결합되도록 구성되는, The inner ring 300 is configured to be press-fitted and coupled to the outer peripheral surface of the wheel hub 200 with an interference amount in the range of Φ0.020 to Φ0.080 mm.
    차량용 휠베어링.Vehicle wheel bearings.
  5. 제4항에 있어서, According to paragraph 4,
    상기 내륜(300)은 상기 휠허브(200)의 차체측 단부를 반경방향 외측으로 소성 변형시켜 형성된 포밍부(220)에 의해 고정되도록 구성되는,The inner ring 300 is configured to be fixed by a forming portion 220 formed by plastically deforming the vehicle body side end of the wheel hub 200 radially outward,
    차량용 휠베어링.Vehicle wheel bearings.
  6. 제4항에 있어서, According to paragraph 4,
    상기 내륜(300)은 상기 휠허브(200)의 차체측 단부에 너트(600)를 결합해 고정되도록 구성되는,The inner ring 300 is configured to be fixed to the vehicle body side end of the wheel hub 200 by combining a nut 600,
    차량용 휠베어링.Vehicle wheel bearings.
  7. 제1항에 있어서, According to paragraph 1,
    상기 수용공간(230)의 내주면에는 열처리 경화부가 형성되고,A heat treatment hardening portion is formed on the inner peripheral surface of the receiving space 230,
    상기 열처리 경화부는 상기 수용공간(230)에 형성된 리세스(240)를 모두 포함하도록 형성되는,The heat treatment hardening portion is formed to include all of the recesses 240 formed in the receiving space 230,
    차량용 휠베어링.Vehicle wheel bearings.
  8. 제7항에 있어서, In clause 7,
    상기 휠허브(210)의 외주면 전부 또는 일부에는 열처리 경화부가 형성되는,A heat treatment hardening portion is formed on all or part of the outer peripheral surface of the wheel hub 210,
    차량용 휠베어링.Vehicle wheel bearings.
PCT/KR2023/010510 2022-07-20 2023-07-20 Vehicle wheel bearing WO2024019563A1 (en)

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KR10-2022-0089949 2022-07-20
KR1020220089949A KR20240012234A (en) 2022-07-20 2022-07-20 Wheel bearing for vehicle

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03279001A (en) * 1990-03-28 1991-12-10 Nissan Motor Co Ltd Axle construction of vehicle
JP2001225606A (en) * 2000-02-17 2001-08-21 Ntn Corp Wheel bearing device, and method of controlling bearing clearance gap
KR20070114499A (en) * 2006-05-29 2007-12-04 주식회사 일진글로벌 Method for measuring a clearance of hub bearing for auto mobile
US20160069394A1 (en) * 2013-04-11 2016-03-10 Ntn Corporation Method For Controlling Bearing Clearance Of Wheel Bearing Apparatus
KR20200076538A (en) * 2018-12-19 2020-06-29 주식회사 일진글로벌 Wheel bearing assembly
KR20220020704A (en) * 2020-08-12 2022-02-21 현대위아 주식회사 Axle assembly for driving wheel of vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03279001A (en) * 1990-03-28 1991-12-10 Nissan Motor Co Ltd Axle construction of vehicle
JP2001225606A (en) * 2000-02-17 2001-08-21 Ntn Corp Wheel bearing device, and method of controlling bearing clearance gap
KR20070114499A (en) * 2006-05-29 2007-12-04 주식회사 일진글로벌 Method for measuring a clearance of hub bearing for auto mobile
US20160069394A1 (en) * 2013-04-11 2016-03-10 Ntn Corporation Method For Controlling Bearing Clearance Of Wheel Bearing Apparatus
KR20200076538A (en) * 2018-12-19 2020-06-29 주식회사 일진글로벌 Wheel bearing assembly
KR20220020704A (en) * 2020-08-12 2022-02-21 현대위아 주식회사 Axle assembly for driving wheel of vehicle

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