Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B27/00—Hubs
  • B60B27/0078—Hubs characterised by the fixation of bearings
  • B60B27/0084—Hubs characterised by the fixation of bearings caulking to fix inner race
• • 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
  • B60B27/0015—Hubs for driven wheels
  • B60B27/0036—Hubs for driven wheels comprising homokinetic joints
  • B60B27/0042—Hubs for driven wheels comprising homokinetic joints characterised by the fixation of the homokinetic joint to the hub
• • 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
  • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
  • F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
  • F16D1/04—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with clamping hub; with hub and longitudinal key
• • 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
• • 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
• • 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
  • F16D2003/22323—Attachments to the shaft of the inner joint member whereby the attachments are distanced from the core
• • 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
  • F16D2003/22326—Attachments to the outer joint member, i.e. attachments to the exterior of the outer joint member or to the shaft of the outer joint member

Definitions

• Driving wheel bearing assembly incorporating a secondary drive shaft
• the invention relates to a rolling bearing assembly for a drive wheel of a motor vehicle.
• Such assemblies which comprise a rotating hub on which the wheel is intended to be mounted, a fixed outer race of a bearing allowing the combination of the assembly to the chassis of the vehicle, and a tripod joint associated with the hub.
• the motor transmission shaft is associated with the tripod joint so as to drive the hub in rotation in the different phases of rolling of the wheel, in particular whatever the relative position of the wheel relative to the frame.
• This embodiment which integrates the combination of the wheel and the torque transmission in one piece, provides a compact, lightweight and robust, which is desirable given the efforts that apply to a wheel driving.
• the tripod joint requires lubrication to ensure optimal operation thereof over time.
• this lubrication makes relatively complex assembly of the motor transmission shaft in the tripod joint, and the decoupling thereof.
• the invention aims to solve the problems of the prior art by providing a rolling bearing assembly in which the coupling of the motor shaft is not made directly on the tripod joint.
• the invention proposes a rolling bearing assembly for a driving wheel of a motor vehicle, said assembly comprising a rotating hub on which the wheel is intended to be mounted, a fixed outer ring of a bearing which is mounted on the wheel. hub via rolling bodies so as to allow the combination of said assembly to the vehicle frame, said hub comprising a bore in which a tripod joint is disposed.
• the assembly further includes a secondary drive shaft which is attached to the tripod joint, the inner end portion of said secondary drive shaft being provided with a reversible coupling device with a motor drive shaft.
• the assembly integrates a portion of the transmission function and makes reversible, at the integrated secondary transmission shaft, the coupling of the motor transmission shaft.
• FIG. 1 is a longitudinal sectional representation of an assembly according to a first embodiment of the invention
• FIG. 2 is a perspective representation of the assembly of FIG. 1;
• FIG. 3 is a partial view of FIG. 1 showing the reversible coupling device in which a motor transmission shaft is coupled;
• - Figure 4 is a similar view of Figure 3 showing the reversible coupling device according to an alternative embodiment;
• FIG. 5 is a representation in longitudinal section of an assembly according to a second embodiment of the invention.
• Figures 6a to 6e are partial views of Figure 5 showing two arrangements of an angular encoder means in combination with three embodiments of the bearing seal;
• FIG. 7 is a representation in longitudinal section of an assembly according to a third embodiment of the invention.
• Figures 8a to 8e are partial views of Figure 7 showing two arrangements of an angular encoder means in combination with two embodiments of the bearing seal.
• FIGS. 1 and 2 a first embodiment of a rolling bearing assembly for a driving wheel of a motor vehicle is described.
• the assembly comprises a rotating hub 1 on which the wheel is intended to be mounted.
• the hub is formed of an annular body having a central bore coaxial with the axis of rotation.
• a radial flange 2 is formed, said flange being provided with orifices 3 forming means for fastening the wheel by screwing.
• two bearing tracks are formed so as to allow them to rotate on two rows of rolling bodies 4.
• a fixed outer ring 5 of a bearing is mounted on the hub 1 , said ring also comprising two bearing tracks arranged opposite those of the hub 1 so as to form a raceway for the rolling bodies 4.
• the rolling bodies 4 of a row are maintained at equidistance and are guided in rotation through a cage.
• the rolling bodies 4 are balls, but could be provided other geometry, including rollers of a conical bearing, and a number of rows of rolling bodies 4 different.
• the outer ring 5 comprises a radial flange 6 provided with orifices 7 forming fastening means by screwing the assembly on a rocket door.
• fixing holes 8 of the brake caliper are also provided in the flange 6.
• the outer ring 5 has no flange, the combination from said ring to the rocket door being then feasible by fitting.
• the running space formed between the outer ring 5 and the hub 1 is sealed by two seals 9, 10 respectively provided on the inner and outer side faces of said space.
• the outer seal 9 comprises a frame 9a mounted in an annular recess of the outer ring 5, and an elastomeric lip 9b associated with the frame, for example by overmolding.
• the lip 9b comprises a free portion which bears against a bearing surface of the body surface.
• this type attached will be called "first type" of seal.
• the inner seal 10 comprises an outer armature 10a fitted into the outer ring 5 and an inner armature 10b fitted on the surface of the body, so as to form an annular space between said armatures.
• An elastomeric lip 10c is associated with the outer armature 10a, said lip comprising at least one free portion bearing against the inner armature 10b. In the rest of the description, this type will be called a "second type" of joint.
• the assembly further comprises a tripod joint which is disposed in the bore of the hub 1 so as to transmit the engine torque to said hub.
• the assembly according to the invention has the advantage of not requiring a seal tripod of complex realization.
• the tripod joint shown comprises an inner ring 11 provided with a bore coaxial with the bore of the hub 1.
• the outer surface of the inner ring 11 is provided with convex bearing paths for rolling bodies 12 which are held by a cage 13 between said bearing paths and concave bearing paths provided on the periphery of the bore of the hub 1.
• the median transverse plane P1 of the tripod joint is disposed between the inner transverse plane P2 of the bearing and the median transverse plane P3 of said bearing.
• the median transverse plane P1 of the tripod joint is substantially coincident with the internal transverse plane P2 of the bearing.
• the assembly further comprises a secondary transmission shaft 14 which is fixed to the tripod joint by fitting the outer end portion of said shaft into the bore of the inner ring 11 of said tripod joint.
• the axial retention of the secondary shaft 14 in the bore is achieved by means of a stop member formed of a ring 15 which is disposed between two annular grooves provided respectively opposite the bore of the inner ring 11 and on the outer surface of the shaft 14.
• the outer end portion of the shaft comprises an annular bearing surface 16 which comes into contact with the inner side face of the inner ring 11.
• the inner end portion of the secondary transmission shaft 14 is provided with a reversible coupling device with a motor transmission shaft 17.
• This embodiment by integrating part of the transmission function, makes it possible to simplify the assembly of the transmission. together on the engine transmission shaft 17 by providing that the coupling is no longer made at the tripod joint, and without complicating the completion of said seal. Thus, the standard exchange of the rolling bearing is simplified.
• a bellows 18 is provided between the hub 1 and the inner end portion.
• This bellows 18, typically made of elastomeric material protects the tripod joint pollutants.
• a lubricant of the tripod joint is contained in the bellows.
• the presence of the reversible coupling device according to the invention makes it possible to overcome the lubrication constraints of the tripod joint during the coupling and uncoupling of the assembly with the motor transmission shaft 17.
• the reversible coupling device comprises a clamping nut 19 which is provided around the inner end portion of the secondary transmission shaft 14.
• the inner end portion of the secondary shaft comprises a cylindrical end of diameter D1 which is provided to allow the arrangement of the motor transmission shaft 17 around said end.
• the outer end of the motor shaft comprises a blind bore 17a of diameter slightly greater than D1 so as to accommodate the end of the secondary shaft inside thereof (see Figure 3).
• axial splines 14a can be provided respectively on the bore and on the outer surface of the end.
• the inner end portion also includes a cylindrical portion adjacent the end, whose diameter D2 is substantially the same as the outside diameter of the bore 17a of the drive shaft 17.
• the bellows 18 comprises a portion 18a forming a sheath for the adjacent portion, that is to say having a cylindrical housing of inner diameter substantially equal to D2.
• the sheath portion 18a extends axially around the end with a substantially constant inner diameter.
• the sheath portion 18a comprises an axial thread on which the nut 19 is moves axially by screwing so as to allow the realization of a tight contact between the portion 18a and the outer surface of the drive shaft 17.
• the nut 19 moves from one position around the adjacent portion in which the shafts 14, 17 can be joined, to a position where it is also arranged around the end, the contact tightening ensuring the coupling being made in this second position.
• the screwing and the nature of the material forming the bellows 18 a tight coupling is obtained between the two shafts 14, 17.
• the nut 19 is formed of a folded sheet 19a comprising an axial annular portion provided with a thread, and an axi-radial fold.
• the nut 19 is formed of a ring 19b whose bore is provided with a thread, and whose outer surface has a geometry for the realization of the clamping, including the nut is nut type full nut, solid hex nut or solid nut with grooves.
• axial notches 20 are provided on the inner surface of the sheath portion 18a, said notches cooperating with axial projections 21 provided on the outer surface of the adjacent portion so as to avoid the rotation of the bellows 18 during the tightening of the nut 19.
• FIG. 5 represents a second embodiment of an assembly in which the reversible coupling device is identical to that of FIG. 4.
• the bore of the hub 1 is plugged on the outer side by a bridge of material 30, for example from the foundry of the hub.
• the material bridge 30 mechanically reinforces the hub 1.
• This embodiment is made possible because of the presence of the reversible coupling device because it makes non-mandatory external access to the tripod joint.
• annular reinforcement 23 is provided between the bellows 18 and the hub 1 to seal between the inside and the outside of the bellows 18.
• armature 23 is not integrated in the bellows 18 but allows, by fitting and possibly clipping on a cylindrical surface of the outer surface of the body of the hub 1, to seal between the bellows 18 and said hub.
• the frame 23 comprises a radial flange 23a.
• this armature 23 can be used as a support for an angular encoder means 24 of the bearing.
• the encoder means 24 may be of the magnetic or optical type, for example in the form of an annular body formed of a binder in which magnetic particles are magnetized so as to present a tangentially alternating succession of North and South poles.
• the armature 23 comprises, connected to the rim 23a, a substantially axial wall 23b on which is disposed, by overmolding, gluing or the like, the encoder means 24.
• the reading of the signal coming from the encoder 24 is radially, and a sensor (not shown) is provided reading distance from the encoder 24 to detect this signal.
• the outer seal is of the first type 9 and the inner seal is of the second type 10, while in FIG. 6b the inner and outer seals are of the first type 9.
• the armature 23 further comprises, connected to the axial wall 23b, a substantially radial wall 23c on which the encoder means 24 is arranged for a facial reading of the signal.
• the seal in FIGS. 6c and 6d is produced with the same types of joint as on the Figures 6b and 6a.
• the axial portion 23b has been elongated with respect to Figure 6d so that the radial portion 23c is disposed near the inner seal.
• the seal used is then of the first type with a free portion of the lip which bears against the face of the radial portion 23c which is opposed to the encoder means 24.
• FIG. 7 represents a third embodiment of an assembly which differs from the first one in that the bearing comprises two inner rings 25a, 25b which are fixed on the outer surface of the hub 1.
• the hub 1 is therefore devoid of The inner rings 25a, 25b are held axially on the one hand by an outer annular abutment 26 on which the outer lateral face of a ring 25a abuts, and on the other hand by realization of a flange 27 after fitting of the inner rings 25a, 25b.
• a flange 27 To achieve this flange 27, one can for example use a method such as that described in FR-A1-2 827 202.
• the flange 27 is then substantially radial and bears on the inner side face of a ring 25b.
• the median transverse plane P1 of the tripod joint is substantially coincident with the median transverse plane P3 of the bearing.
• the armature 23 is associated with the bellows 18 so as to allow its association on the hub 1 by fitting, said armature comprising a radial flange 23a.
• arrangements of the encoder means 24 are described on such a frame 23.
• the armature 23 comprises, connected to the flange 23a, a substantially axial wall 23b on which the encoder means 24 is arranged for a radial reading.
• the outer seal is of the first type 9 and the inner seal is of the second type 10
• the inner and outer seals are of the first type 9.
• the armature 23 further comprises, connected to the axial wall 23b, a substantially radial wall 23c on which is disposed the encoder means 24 for a facial reading of the signal.
• the seal in FIGS. 8c and 8d-8e is made with the same types of seal as in FIGS. 8b and 8a respectively.
• the flange 23a comprises a curved fold 23e to surround the flange 27.
• the axial wall 23b covers the space between the flange 27 and the inner ring 25b, which contributes to limiting the corrosion phenomenon at this level.
• the armature 23 is overmolded by an elastomeric material to improve its sealing function.
• the encoder means 24 is disposed on the inner face of the wall 23c.
• the instrumentation of the armature 23 of a bellows 18 on a hub 1 has advantages that can be used by those skilled in the art independently of the reversible coupling device. Therefore, the present description also relates to a rolling bearing assembly for a motor vehicle drive wheel, said assembly comprising a rotating hub 1 on which the wheel is intended to be mounted, a fixed outer ring 5 of a bearing which is mounted on the hub 1 via rolling bodies 4 so as to allow the combination of said assembly to the chassis of the vehicle, said hub comprising a bore in which a tripod joint is disposed, wherein a frame 23 carrying an angular encoder means 24 as described above is provided to associate a bellows 18 between the hub 1 and a transmission shaft associated with the tripod joint.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=36098102

Family Applications (1)

Country Status (3)

Families Citing this family (3)

Family Cites Families (5)

• 2005
  • 2005-07-18 FR FR0552224A patent/FR2888529B1/fr not_active Expired - Fee Related
• 2006
  • 2006-06-30 WO PCT/FR2006/001552 patent/WO2007010105A1/fr not_active Application Discontinuation
  • 2006-06-30 EP EP06778740A patent/EP1904755A1/de not_active Withdrawn

Non-Patent Citations (1)

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