• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A wheel carrier (1) mounted on a rear axle body (2) of a vehicle, which wheel carrier comprises a supporting plate (14) and a bearing plate (15). The supporting plate (14) coincide with a "virtual king-pin axis" (12) and the properties of the supporting plate (14) are such that the supporting plate may bend around the "virtual king-pin axis" (12) in the area of a flexible supporting section (18). The bearing plate (15) comprises a section with such properties that the section is allowed to deflect in a lateral direction of the vehicle. When a lateral force Fiaterai and a brake force Fis applied to the wheel carrier (1), e.g. during cornering and braking, such that the properties of the supporting plate (14) and the bearing plate (15) create lateral force under steer and brake force under steer for a wheel (4) mounted on the wheel carrier (1).(Fig. 3)
    公开号:SE1550617A1
    申请号:SE1550617
    申请日:2015-05-13
    公开日:2016-11-14
    发明作者:Andersson John-Erik
    申请人:China-Euro Vehicle Tech Ab；
    IPC主号:
    专利说明:

    [1] [0001] The present invention relates generally to a wheel carrier according tothe preamble of claim 1.
    [2] [0002] From prior art twist beam rear suspensions are known, which are lightand cost efficient and which provide geometrical packaging advantages. Theyhave drawbacks such as low lateral stiffness, lateral force oversteer, brake forceoversteer, low longitudinal compliance and unfavorable geometry as trajectoryangle and anti-lift angle.
    [3] [0003] An example of a suspended axle with control of the steering angle isdescribed in US 7,891 ,674. The flexible axle connect wheel carriers provided onthe axle. Each wheel carrier comprises a rigid mounting plate which bears twosubstantially vertical pivots. The location of the pivots dictates the steering angle.Each vertical pivot comprises elastic articulations, which are provided on the wheelcarrier. An elastically deformable element is interposed between the interiorsurface of each housing and the exterior surface of the hole and a rigidcomponent. The structure of the elastic articulation is dimensioned to minimizesteering torque. A drawback with the axle according to US 7,891,674 is that theincluded details such as ball joints and bushings, which are designed to holdknuckle in a preferred geometry are expensive. Another drawback is that the jointsand the bushings induce an extra weight to the design of the axle.
    [4] [0004] ln the above prior art the values of lateral force understeer and brakeforce understeer depend on specific bushing stiffness' and the position of thevirtual king-pin axis.
    [5] [0005] The wheel carrier according to the invention are able to tune values forlateral stiffness, longitudinal stiffness, lateral force understeer and brake forceundersteer by means of the properties of the design and material chosen for thewheel carrier.200156SESummary of invention
    [6] [0006] An object of the present invention is to create a wheel carrier mounted ona rear axle body with a Simplified design to reduce manufacturing costs and at thesame time achieve improved steering properties by means of desired lateralstiffness, improved handling properties by achieving lateral force understeer, andimproved brake stability by means of brake force understeer and improved ridecomfort by transient insulation compared to the rear axle body according to theprior art document.
    [7] [0007] The wheel carrier according to the invention, which wheel carrier ismounted on a rear axle body of a vehicle. The wheel carrier comprises asupporting plate and a bearing plate. The supporting plate is attached to the rearaxle body and the bearing plate. The supporting plate extends in a substantiallytransversal direction of the vehicle, and a flexible supporting section is provided inan area where the supporting plate coincide with a “virtual king-pin axis” of thewheel carrier. The bearing plate is parallel to or may in one embodiment besubstantially parallel to a wheel bearing of a wheel.
    [8] [0008] The properties of the supporting plate are such that the supporting platemay bend around the virtual “king-pin axis” in the area of the flexible supportingsection when a lateral cornering force and a brake force in a contact patch withground is applied to the wheel carrier, e.g. during cornering or braking. Thebearing plate comprises a first bearing plate section and a second bearing platesection with such properties that the second bearing plate section is allowed todeflect in a lateral direction of the vehicle, when a lateral cornering force or a brakeforce is applied to a tyre at contact patch with ground, e.g. during cornering orbraking. Thus the properties of the supporting plate and the bearing plate achievelateral force under steer and brake force under steer for the wheel mounted on thewheel carrier.
    [9] [0009] The first bearing section is provided in an area around the center of thewheel bearing and the second bearing plate section is provided in front of the firstbearing plate section. The first bearing section, in a lateral direction of the vehicle,200156SEis provided with stiff material properties and the second bearing section is providedwith less stiff material properties than the first bearing section.
    [10] [0010] The first and second bearing plate sections, in a longitudinal direction ofthe vehicle, are both provided with stiff material properties. The second bearingplate section may be provided with one or more apertures, this to create less stiffproperties in a lateral direction of the vehicle than the first bearing plate section.
    [11] [0011] The second bearing section may be manufactured of a material which isprovided with same wall thickness or thinner wall thickness than the material of thefirst bearing section.
    [12] [0012] The supporting plate comprises a first supporting section and a secondsupporting section, and the properties of the first and second supporting sectionsare more stiff than the properties of the flexible supporting section.
    [13] [0013] The flexible supporting section of the supporting plate is provided withone or more recesses along the virtual “king-pin axis”. The first and/or secondsupporting sections of the flexible supporting section are provided with one ormore recesses and/or apertures.
    [14] [0014] The first supporting section of the supporting plate is attached to a firstsupporting flange, and the first supporting flange is attached to the first bearingsection and the first supporting section, and the second supporting section of thesupporting plate is attached to a second supporting flange, and the secondsupporting flange is attached to the second supporting section and to the rear axlebody.
    [15] [0015] The first bearing plate section is attached to the first supporting section ofthe supporting plate and the second bearing plate section is rigidly attached to therear axle body. The supporting plate and bearing plate are preferablymanufactured of sheet metal, forged metal or die casted metal. Further, theinvention comprises a rear axle body of a vehicle, comprising wheel carriers.200156SEBrief description of drawinqs
    [16] [0016] The invention is now described, by way of example, with reference to theaccompanying drawings, in which:
    [17] [0017] Fig. 1 shows a rear section view of a wheel carrier mounted on a rearaxle body of a vehicle according to the invention,
    [18] [0018] Fig. 2 shows a top view of the wheel carrier on a rear axle body of avehicle,[0019] Fig. 3 shows a top view of the wheel carrier on the rear axle body,
    [20] [0020] Fig. 4 shows a side view of the wheel carrier, seen from outside thevehicle, and
    [21] [0021] Fig. 5 shows a side view of the wheel carrier, seen from inside thevehicle.
    [22] [0022] ln the description below, various directions will be given with reference toa vehicle oriented in a forward driving direction. Example of such directions can belateral, longitudinal, transversal, front, vertical, horizontal. lt should particularly bepointed out that the directions are given with reference to a wheel carrier mountedon a rear axle body of a vehicle.
    [23] [0023] ln the following, a detailed description of the wheel carrier 1 suitable for arear axle body 2 according to the invention disclosed in Fig. 1-5 will be given.Further, Fig. 1 shows a rear section view of a countersteering rear axle 3comprising a wheel carrier 1 mounted on a rear axle body 2. The rear axle body 2extend in a transversal direction of the vehicle, and is firmly attached to the wheelcarrier 1 whereupon a wheel 4 is mounted. An intersection point between ahorizontal axle 5 positioned in the middle between a upper surface 6 and a lowersurface 7 of a wheel 4 mounted on the rear axle body 2 and a vertical plane 8positioned in the middle between the vertical sides 9, 10 of the wheel 4 mountedon the rear axle body 2 constitute the position for the wheel centre 11, as shown in200156SEFig. 1. A “virtual king-pin axle” 12 is shown which constitutes the main pivot in asteering mechanism of the countersteering wheel carrier.
    [24] [0024] Fig 2 shows a top view of the wheel carrier 1 on a rear axle body 2. Therear axle body 2 is suspended around a suspension axle 13, which is positioned ina front portion of the rear axle body 2, seen in a forward driving direction of thevehicle. The wheel carrier 1 is shown to the left without a wheel and to the rightwith a wheel 4. The horizontal axle 5 is shown extending through the wheel centre11. The “virtual king-pin axle” 12 is angled and intersect with ground outside thewheel centre and behind the horizontal axle 5 and the wheel centre 11, seen in adriving direction of the vehicle.
    [25] [0025] Fig. 3 shows a top view of the wheel carrier 1 on the rear axle body 2,comprising a supporting plate 14 and a bearing plate 15. The supporting plate 14is attached to the rear axle body 2 and the bearing plate 15. The supporting plate14 is preferably welded together with the rear axle body 2 and the bearing plate15. The supporting plate 14 is arranged to preferably extend in a substantiallytransversal direction of the vehicle, and comprises a first supporting section 16and a second supporting section 17. The first supporting section 16 is attached tothe bearing plate 15 and the second supporting section 17 is attached to the rearaxle body 2. A flexible supporting section 18 is provided in an area where the firstand second supporting sections 16, 17 of the supporting plate 14 coincide, and thewhole supporting plate 14 extend in a common virtual geometric plan, in a neutralunaffected condition. The flexible supporting section 18 preferably coincide with a“virtual king-pin axis” 12 of the wheel carrier 1. The properties of the supportingplate 14 are such that the supporting plate 14 bend around the “virtual king-pinaxis” 12 in the area of the flexible supporting section 18 when a lateral force F|arem|or brake force Fbfake in a contact patch with ground is applied to the wheel carrier1, e.g. during cornering or braking.
    [26] [0026] Fig. 4 shows a side view of the wheel carrier 1, seen from outside thevehicle. ln one embodiment the bearing plate 15 is substantially parallel to a wheelbearing of a wheel 4, and the bearing plate 15 comprises a first bearing plate200156SEsection 19 and a second bearing plate section 20 with such properties that thesecond bearing plate section 20 is allowed to deflect or move in an lateral directionto the vehicle, when a lateral force F|atefa| is applied to the wheel carrier 1, e.g.during cornering or braking. Thus the properties of the supporting plate 14 and thebearing plate 15 are such that they achieve lateral force under steer, when alateral force Flarefal is applied to the wheel carrier 1, e.g. during cornering and brakeforce under steer for the wheel 4 mounted on the wheel carrier 1, when a brakeforce Fbfake in a contact patch with ground is applied to the wheel carrier 1, e.g.during braking.
    [27] [0027] The first bearing plate section 19 is provided in an area in contact withthe center of the wheel bearing, which area is continuous. The second bearingplate section 20 is provided in front of the first bearing plate section 19. The firstbearing plate section 19 and the second bearing plate section 20 aremanufactured of a material of a uniform thickness, in a transversal direction of thevehicle. The uniform thickness of the bearing plate 15 simplifies and reduces themanufacturing costs.
    [28] [0028] The first bearing plate section 19, in a lateral direction of the vehicle, isprovided with stiff material properties and the second bearing plate section 20 isprovided with less stiff material properties than the first bearing plate section19.Thus, the material of the bearing section (19) having a stiffness which is higherthan the stiffness of the material of the second bearing section (20.
    [29] [0029] ln one embodiment the dissimilar properties in the lateral direction of thefirst and second bearing plate sections 19, 20 are created by means of one ormore apertures in the second bearing section 20. The first bearing plate section 19is preferably separated from the second bearing plate section 20 in the area wherean aperture 21 of the second bearing plate section 20 is provided. ln one preferredembodiment the second bearing plate section 20 is provided with one aperture 21.Thus the second bearing plate section 20 is V-shaped, provided with a upper anda lower leg 22, 23. The width W of the first and second legs 22, 23 depend onwhich deflection properties that are desired. Since the first and second bearing200156SEplate sections 19, 20 preferably are manufactured of a material with similarthickness, the aperture 21 of the second bearing plate section 20 provide less stiffproperties in a lateral direction of the vehicle than for the first bearing plate section19. The second bearing plate section is fixedly attached to the rear axle body 2,preferably by means of welding.
    [30] [0030] The second bearing plate section 20 is provided with one or morebearing supporting plates 24. Preferably the bearing supporting plates 24 areprovided in a front end of the second bearing plate section 20. To create stabilitythe bearing supporting plates 24 are provided in a V-formation, and the bearingsupporting plates 24 are spaced apart and attached to the rear axle body 2. Thebearing supporting plates 24 are preferably welded to the second bearing platesection 20 and to the rear axle body 2.
    [31] [0031] ln another embodiment the dissimilar properties in the lateral direction ofthe first and second bearing plate sections 19, 20 are created by means of amaterial which is provided with a thinner wall thickness for the second bearingplate section 20 than the material of the first bearing plate section 19, creating lessstiff properties in a lateral direction of the vehicle than for the first bearing platesection 19.
    [32] [0032] The first and second bearing plate sections 19, 20 are both provided withstiff material properties in longitudinal and vertical directions of the vehicle, in orderto transmit most of the longitudinal forces and a large portion of the vertical forcesto the axle body 2. ln a preferred embodiment first and second outer surfaces 25,26 of the first and second bearing plate sections 19, 20 are provided in a commongeometrical virtual plane. ln another embodiment the first outer surface 25 of thefirst bearing plate section 19 and the second outer surface 26 of the secondbearing plate section 20 are angled in relation to each other. The second outersurface 26 may be angled inward the vehicle, and the inclination of the secondouter surface 26 may coincide with the “virtual king-pin axle” 12, seen in alongitudinal direction of the vehicle. Even more preferably the “virtual king-pin axis”12 coincide with an angled virtual geometrical plane which extend through the200156SEsecond bearing plate section 20 at half the material thickness, seen in alongitudinal direction of the vehicle.
    [33] [0033] Fig. 5 shows a side view of the wheel carrier 1, seen from an inside viewof the vehicle. The supporting plate 14 is shown, and the properties of the first andsecond supporting sections 16, 17 are stiffer than the properties of the flexiblesupporting section 18 which coincide with the “virtual king-pin axle” 12. The wholesupporting plate 14 is preferably arranged in an extension plane in a lateraldirection of the vehicle which is close to perpendicular or perpendicular to thevertical plane 8, shown in Fig. 1. Preferably the supporting plate 14 ismanufactured of a sheet steel material with homogeneous material properties.
    [34] [0034] To attain less stiff properties for the flexible supporting section 18 one ormore recesses 28, seen in Fig. 3, are provided along the “virtual king-pin axis” 12,this to weaken the material. Further, the first and/or second supporting sections16, 17 may be provided with one or more recesses and/or apertures, this toreduce the total weight of the wheel carrier 1.
    [35] [0035] The first and second supporting sections 16, 17 of the supporting plate14 is attached to first and second supporting flanges 29, 30, respectively. The firstsupporting flange 29 is attached to the first bearing plate section 19 and the firstsupporting section 16, and the second supporting section 17 is attached to thesecond supporting flange 30, and the second supporting flange 30 is attached tothe second supporting section 17 and to the rear axle body 2. The first bearingplate section 19 is attached to the first supporting section 16 and the secondbearing plate section 20 is rigidly attached to the rear axle body 2. Further, thesupporting plate and the bearing plate are manufactured of sheet metal, forgedmetal or die casted metal.
    [36] [0036] ln Fig. 3 the wheel center 11 and the position 27 where the “virtual king-pin axle” 12 coincide with ground are shown. The longitudinal position where alateral force Flaiefal is applied to a tyre, e.g. during cornering, and the longitudinalposition where the “virtual king-pin axis” 12 coincide with ground are both placedbehind and outside the wheel centre 11. The lateral cornering force Fialerai is200156SEapplied to the wheel 4 at a distance B behind the horizontal axle 5 through thewheel centre 11. The longitudinal position where the “virtual king-pin axle” 12coincide with ground is placed at a longitudinal distance A or B+C from the virtualvertical plane 8 through the wheel centre 11. The value C is preferably larger thanthe value B. This gives a negative value of the caster trail. A “king-pin axis” 12 witha negative caster trail is created, this to be able to apply the lateral cornering forceFialefai in front of the position 27 where the “virtual king-pin axis” 12 coincide withground. By this arrangement a steering torque is created. ln combination with theflexible bearing plate 15 a lateral force under steer is created.
    [37] [0037] Brake force oversteer for a twist beam rear axle suspension normally is aresult of compliances in the structure. The structure of the bearing plate 15 and thesupporting plate 14 are exposed for a bending momentwhen braking. Fig. 3shows the “virtual king-pin axis” 12 which coincide with ground behind the wheelcentre 11 at a lateral perpendicular distance D to the virtual vertical plane throughthe wheel centre 11. The distance D creates a negative scrub radii since placedoutside the wheel centre 11. The brake force Fbfake is applied in a contact patch fora wheel 4 with ground in a longitudinal vertical plane 8 which extends through thewheel centre 11, and creates a brake force torque. A “virtual king-pin axis” 12 iscreated with a negative steering radii, so that the brake force Fbfake will act insidethe position 27 where the “virtual king-pin axis” 12 coincide with ground. By thisarrangement a steering torque is created. ln combination with the supporting plate14 a bending moment is created in the second bearing plate which create a brakeforce under steer.
    [38] [0038] Thus, the value of longitudinal distances B and C together with thedeflection properties of the upper and lower legs 22, 23 of the second bearingplate section 20 and the flexible supporting section 18 and the position D of wherethe “virtual king-pin axle” 12 coincide with ground creates lateral force under steerand brake force under steer.
    [39] [0039] The deflection of the supporting plate 14 and the bearing plate 15 arenon-plastic. The value of countersteering is the target for lateral force under steer200156SEand brake force understeer together with the value of over steer obtained from thetwist beam configuration.
    权利要求:
    Claims (12)
    [1] 1. A wheel carrier (1) mounted on a rear axle body (2), which wheel carriercomprises a supporting plate (14) and a bearing plate (15), the supporting plate (14) is attached to the rear axle body (2) and the bearing plate(15), and the supporting plate (14) extend in an substantially transversal directionof the vehicle, and a flexible supporting section (18) is provided in an area wherethe supporting plate (14) coincide with a “virtual king-pin axis” (12) of the wheelcarrier (1 ), the bearing plate (15) characterized in that the properties of the supporting plate (14) are such that the supporting plate (14)bend around the virtual “king-pin axis” (12) in the area of the flexible supportingsection (18) when a lateral force Fiaierai or brake force Fbrake in a contact patch withground is applied to the wheel carrier (1 ), the bearing plate (15) comprises a first bearing plate section (19) and a secondbearing plate section (20) with such properties that the second bearing platesection (20) is allowed to deflect in an lateral direction of the vehicle, when alateral cornering force Fiaierai or a brake force Fbrake is applied to carrier at tyrecontact patch with ground, thus the properties of the supporting plate (14) and thebearing plate (19) achieve lateral force under steer and brake force under steer forthe wheel (4) mounted on the wheel carrier (1 ).
    [2] 2. Wheel carrier according to claim 1, wherein the first bearing platesection (19) is provided in an area around the center of the wheel bearing and thesecond bearing plate section (20) is provided in front of the first bearing platesection (19), which first bearing section (19), in a lateral direction of the vehicle, isprovided with stiff material properties and the second bearing section (20) is provided with less stiff material properties than the first bearing section (19). 200156SE12
    [3] 3. Wheel carrier according to any of claims 1-2, wherein the first andsecond bearing plate sections (19, 20), in a Iongitudinal direction of the vehicle,are both provided with stiff material properties.
    [4] 4. Wheel carrier according to any of claims 1-3, wherein the second bearingplate section (20) is provided with one or more apertures (21), create less stiffproperties in a lateral direction of the vehicle than the first bearing plate section(19).
    [5] 5. Wheel carrier according to any of claims 1-4, wherein the second bearingsection (20) is manufactured of a material which is provided with a same wallthickness or thinner wall thickness than the material of the first bearing section(19).
    [6] 6. Wheel carrier according to any of claims 1-5, wherein the supportingplate (14) comprises a first supporting section (16) and a second supportingsection (17), and the properties of the first and second supporting sections (16, 17) are more stiff than the properties of the flexible supporting section (18).
    [7] 7. Wheel carrier according to any of claims 1-6, wherein the flexiblesupporting section (18) of the supporting plate (14) is provided with one or morerecesses (28) along the virtual “king-pin axis” (12).
    [8] 8. Wheel carrier according to any of claims 1-7, wherein the first and/orsecond supporting sections (16, 17) of the flexible supporting section (18) areprovided with one or more recesses and/or apertures (28).
    [9] 9. Wheel carrier according to any of claims 1-8, wherein the first supportingsection (16) of the supporting plate (14) is attached to a first supporting flange(29), and the first supporting flange (29) is attached to the first bearing platesection (19) and the first supporting section (16), and the second supportingsection (17) of the supporting plate (14) is attached to a second supporting flange(30), and the second supporting flange (30) is attached to the second supportingsection (17) and to the rear axle body (2). 200156SE13
    [10] 10. Wheel carrier according to any of claims 1-9, wherein the first bearingplate section (19) is attached to the first supporting section (16) of the supportingplate (14) and the second bearing plate section (20) is rigidly attached to the rearaxle body (2).
    [11] 11. Wheel carrier according to any of claims 1-10, wherein the supportingplate (14) and the bearing plate (15) are manufactured of sheet metal, forgedmetal or die casted metal.
    [12] 12. A rear axle body (2), comprising wheel carriers (1) according to any ofthe previous claims 1-11.
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    同族专利:
    公开号 | 公开日
    US20170087954A1|2017-03-30|
    EP3140140A1|2017-03-15|
    SE540561C2|2018-10-02|
    CN106457953A|2017-02-22|
    HUE038296T2|2018-10-29|
    WO2016182501A1|2016-11-17|
    US9682606B2|2017-06-20|
    PL3140140T3|2018-11-30|
    EP3140140B1|2018-04-11|
    TR201808155T4|2018-07-23|
    CN106457953B|2018-05-29|
    ES2674226T3|2018-06-28|
    引用文献:
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    FR3068917B1|2017-07-12|2020-03-27|Renault S.A.S|MOTOR VEHICLE AXLE COMPRISING MEANS FOR ATTACHING A WHEEL BEARING TO THE AXLE HEAD|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1550617A|SE540561C2|2015-05-13|2015-05-13|Wheel carrier|SE1550617A| SE540561C2|2015-05-13|2015-05-13|Wheel carrier|
    PCT/SE2016/050431| WO2016182501A1|2015-05-13|2016-05-12|Wheel carrier|
    TR2018/08155T| TR201808155T4|2015-05-13|2016-05-12|Wheel carrier.|
    CN201680001651.XA| CN106457953B|2015-05-13|2016-05-12|Wheel carrier and rear pontic|
    HUE16728418A| HUE038296T2|2015-05-13|2016-05-12|Wheel carrier|
    EP16728418.1A| EP3140140B1|2015-05-13|2016-05-12|Wheel carrier|
    PL16728418T| PL3140140T3|2015-05-13|2016-05-12|Wheel carrier|
    ES16728418.1T| ES2674226T3|2015-05-13|2016-05-12|Portaruedas|
    US15/374,667| US9682606B2|2015-05-13|2016-12-09|Wheel carrier|
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