CA2689967C - Wheel bearing assemblies incorporating sensing arrangements - Google Patents
Wheel bearing assemblies incorporating sensing arrangements Download PDFInfo
- Publication number
- CA2689967C CA2689967C CA 2689967 CA2689967A CA2689967C CA 2689967 C CA2689967 C CA 2689967C CA 2689967 CA2689967 CA 2689967 CA 2689967 A CA2689967 A CA 2689967A CA 2689967 C CA2689967 C CA 2689967C
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- CA
- Canada
- Prior art keywords
- encoders
- sensors
- bearing
- encoder
- rings
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 230000000712 assembly Effects 0.000 title description 6
- 238000000429 assembly Methods 0.000 title description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000005355 Hall effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/41—Ball cages comb-shaped
- F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
- F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
- F16C33/416—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
-
- 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
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
- G01P3/446—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings mounted between two axially spaced rows of rolling elements
-
- 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
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
- F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
-
- 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
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/02—Wheel hubs or castors
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A vehicular wheel bearing assembly with relatively rotatable bearing rings (11, 10) and rolling elements (12) therebetween incorporates a sensing arrangement for sensing speed or position. The sensing arrangement is composed of pre-formed annular encoders (21, 23) with alternate magnetic north and south poles which are offset both radially and axially relative to the rotational axis defined by the bearing rings (10, 11). The encoders (21, 23) are mounted on different components of the assembly, for example on a cage (19) and one of the bearing rings (10) which is intended to rotate. Sensors (28, 29) in a housing (25) fitted to the outer bearing ring (11) intended to remain stationary detect the movement of the poles of the respective encoders (21, 23) to generate electrical signals which can be combined or processed separately. In an alternative embodiment, only on encoder mounted on the cage is used, with a sensor on another part of the assembly.
Description
-- 1 __ Whee! Bearing Assemb/ies lncorporating Sensing Arrangements The present invention relates to vehicle wheel bearing assemblies and more particulariy to such assemblies equipped with sensing arrangements for sensing rotary speed or position.
In this field there have been many prior art constructions which can be taken to form the background for the invention. In general, rotary bearings employing sensing arrangements for sensing rotary speed or position can employ a pre-fabricated=
annular component made of polymeric materiai containing ferrous material which is treated to form aitemate north and south magnetic poles, see for example, US Patent 5089817.
Such a component referred to as an encoder can be mounted in the assembly to cause the magnetic poles to pass alongside a sensor, such as a Hall effect sensor, which generates a pulsed electrical signai.
An object of the present invention is to provide improved assemblies and sensing arrangement$ of the aforementioned kind.
Accordingly the present invention provides a wheel bearing assembly composed of Inner and outer bearing rings, one of which is intended to rotate and the other of which Is intended to remain stationary, two sets of rolling elements between the rings and in angular contact with=tracks defined by the rings, each set of rolling elements being spaced in the direction of the axis of rotation with each set of roiiing elements retained by one of two cages and a sensing arrangement composed of at least two annular i encoders with aitemate north and south magnetic poles and at least two sensors operably associated with the encoders and each serving to provide eiectrical signals generated by the passage of the poles of the associated encoder;
wherein one of the encoders is mounted on the rotatable one of the bearing rings and, the other of the encoders is mounted on one of the cages and _.. 2 ~
each of said sensors and encoders is disposed axially, between the sets of rolling elements.
The encoder can be mounted on different components of the assembly such as on one of the cages and on the rotatable bearing ring. This enables the signals generated by the sensors to be compared, for example. The encoders can be orientated with their magnetic poles parallel to the rotational axis thus in an axial orientation or radial to this axis thus In a radial orientation or in both axial and radial orientations.
The sensors and encoders may be built into the bearing in a protected position between the sets; of rolling elements. To locate the sensors use can be made of a housing or a mounting'as described hereinafter.
In other embodiments the sensors and encoders lie outboard of the bearing and the wheei assembiy for ease of installation or removal. A second aspeCt of the present invention provides a wheel bearing -assembly composed of inner and outer bearing rings, one of which is intended to rotate and the other of which is intended to remain stationary, sets of rolling elements between the rings and in angular contact with tracks defined by the rings, the sets of rolling elements being spaced in the direction of the axis of rotation with each set of rolling elements retained by a cage and a sensing arrangement composed of at least two annular encoders with altemate north and south magnetic poles and at least two sensprs operably associated with the encoders and each serving to provide electrical signals generated by the passage of the poles of the associated encoder;
wherein one of the encoders is mounted on the rotatable one of the bearing rings and, the other of the encoders is mounted on one of the cages and wherein the inner bearing ring is secured onto a wheel hub, a cover is located on the other bearing ring to enclose the sensors and is carried by an axial portion of the cover.
'T'he invention may be understood more readily, and various other aspects and features of the Invention may become apparent, from consideration of the foliowing descript-on.
Wheel bearing assembiies embodying the invention will now be described, by way of examples only, with reference to the accompanying drawings, wherein:
Figure 1 is a schematic sectional side view of a first embodiment of a wheel bearing assembly;
Figure 2 is an enlarged view of part of the assembly shown in Figure 1;
Figure 3 is a schematic sectional side view of a second embodiment of a=wheel bearing assembly;
Figure 4 is a schematic sectional side view of a third embodiment of a wheel bearing assembly, Figure 5 is a schematic sectional side view of a fourth embodiment of a wheei bearing assembly, i S Figure 6 is a schematic sectional side view of a fifth embodiment of a wheel bearing assembly, Figure 7 is a schematic sectional side view of a sixth embodiment of a wheel bearing assembly, Figure 8 is a schematic sectional side view of a seventh embodiment of a wheel bearing assembly Figure 9 is a schematic sectional side view of an eighth embodiment of a wheel bearing assembly. The constniction of the various wheel bearing assemblies 9 illustrated throughout the accompanying drawings is well known parse and like reference, numerals are used to designate the same components.
Refercing initially to Figure 1, there is an inner bearing ring 10, an outer beartng ring 11 and two sets or rows of rolling elements in the form of balls 12 therebetween.
The bails 12 make angular contact with ninning tracks 13, 14 in the rings 10, 11. In this assembiy, the right-hand or innermost track 14 of the ring 10 is actually formed by a separate support 15 located in a recess 8 in the inner ring 10. A wheel hub is fixed to or integral with the inner ring 10 and receives a nut 16 which locates on the support 15. A
detachable pressing fits into an outer projecting region 5 of the outer ring 11 and acts as a cover 6 for the nut 16. At the opposite left-hand or outemnost end regions of the rings 10, 11 there is a seal 17. Each set of balls 12 is fitted into a cage 18, 19 made of plastics materiaL As is known, the cages 18, 19 maintain separation between the balls 12 and guide the balls 12 making up each set for progression around the tracks 13, 14.
During use, the inner rina 10 rotates with the wheel hub whilst the outer ring 11 = remains stationary. The balls 12 progressively roll in relation to the tracks 13, 14.
In accordance with the invention, the assembly 9 is equipped with a sensing arrangement designed to provide an indication of rotary speed or positlon_ As shown in Figures 1 and 2, the cage 19 has an axial projection 20 which extends outwardly towards the other ball set. A first pre-formed annular encoder 21 with aitemate axially-orientated north and south magnetic poles is fitted onto an axial surface 22 of the projection 20 to confront the inner surface of the outer ring 11, A second pnr-formed annular encoder 23 with afterrmate north and south axially-orientated magnetic poles is fitted onto the inner surface of the inner bearing ring 10. The encoders 21. 23 are axially and radially offset in relation to one another.
A radial bore 24 in the oqter ring 11 receives a housing 25, As shown in Figure 2, the inner end of the housing 25 has a stepped profile with end wafls 26, 27 offset in the radial direction. The end walls 26, 27 mount sensors 28, 29 which detect the passage of the magnetic poles of the encoders 21, 23 and provide pulsed electrical signals with a repetition frequency depending on the movement of the poles of the encoders 21, 23.
- $ -The signals ere carried on leads 30, 31 connected with the sensors 28, 29_ The signals from the sensor 28 represent the rotary speed of the cage 19 while the signals from the sensor 29 represent the rotary speed of the inner ring 10. The signals can be used in a variety of ways quite separately and independently or combined or compared with one another.
Figure 3 shows a modified form of the sensing arrangement shown in Figures 1 and 2. In this arrangement, the encoder 23 is mounted on a support ring 32 fitted to the inner surface of the inner bearing ring 10 and the magnetic poles of the encoders 22, 23 lie in a common axial plane. The associated sensors 28, 29 are iikewise orientated in a ] 0 common axial plane corresponding to the inner surface of the outer ring 11. The sensors 28, 29 are mounted at the inner end of a bore 24 in the ring 11. The leads 30, 31 are used to support and position the sensors 28, 29 and these leads 30, 31;
emerge from the bore 24.
In the embodiments described and illustrated so far the encoders and sensors 21, 23, 28, 29 are all inboard between the sets of balls 12.
In other constructions the encoders and sensors can be outside the bearing interior. Thus, Figure 4 shows another sensing arrangement with two encoders 21, 23 and two sensors 28, 29. The first encoder 21 is again located on an axial projection 20 of the cage 19 but in this embodiment the projection 20 extends outwardly rather than inwardly. The second encoder 23 is mounted on an axial region of a further L-shaped ring 33 disposed outside the bearing_ A radial region of this ring 33 is clamped by the nut 16 against the support 15. As with the arrangement shown in Figure 3, the magnetic poles of the encoders 21, 23 lie in a common axial plane as do the opposed associated sensors 28, 29 which are now supported on an axial portion 34 of the cover 6.
In the assemblies and arrangements depicted in Figures 1 to 4 the encoders 21.
23 and the sensors 28, 29 are located predominantly in the axial disposition.
Figures 5 and 6 show somewhat different arrangements where the encoders 21. 23 and the sensors 28, 29 take a radial disposition. In the arrangement shown in Figure 5 the encoder 21 is mounted on an outermost radial surface 35 of the outer cage 19 so the magnetic poles take a radial orientation. The encoder 23 is here mounted on a plane washer 36 clamped between the nut 16 and the support 15. As can be seen, the encoders 21, 23 are both axially and radially offset. The associated sensors 28, 29 are likewise axially and radially offset and suspended, for example, by a deformabie sleeving surrounding the leads 30, 31 and bent into an L-shape. The sleeving can be secured to the axial portion 34 of the cover 6 in any suitable fashion.
Figure 6 shows another arrangement with the encoders 21, 23 and the sensors 28, 29 all in a radial orientation. In this arrangement, the encoder 21 is supported on the innermost radial end face 35 of the cage 18. The encoder 23 confronts the encoder 21 and is radially aligned but axially offset with respect to the encoder 21. A
suppOrt ring 39 fits into a recess 43 in the inner surface of the inner bearing ring 10 and the support ring 39 serves to mount the encoder 23. The associated sensors 28, 29 are again ' suspended by their leads 30, 31 in the sensor vicinity of the encoders 21, 23.
The leads 30, 31 pass through the bore 24 in the bearing ring 11.
Figure 7 shows an arrangement where the encoders 21, 23 and the sensors 28, 29 are orientated both radially and axiaiiy_ Thus, the encoder 21 is again mounted on the radial surface 35 of the cage 18 as is in the embodiment shown in Figure 5.
However the washer 36 is now L-shaped with an axial region 37 supporting the encoder 23 in an axial orientation generally normal to the orientation of the encoder 21. A
tubuiar housing again secured to the axial portion 34 of the cover 6 accommodates the s+ensors 28, 29, The.housing 25 has a radially orientated- inner end wall 38 supporting the sensor 28 in the sensing vicinity of the encoder 21 and an axial wall 39 supporting the sensor 29 in 25 the sensing vicinity of the encoder 23.
Figure 8 depicts a similar arrangement to Figure 6 but here the shape and mass of the support ring 37 for the encoder 21 is modified. The ring 39 Is now L-shaped and has an axial flange portion 41 fitted directly to the inner surface of the inner ring 10 which is no longer provided with a recess.
Figure 9 is again similar to the arrangement shown in Figure 8 but here the encoder 21 is fixed to the cage 18 with screws. In this arrangement the mounting of the sensors 28, 29 is achieved with the aid of a mounting bfock 42. The mounting block 42 has a flange 43 affixed with screws 44 to the outer bearing ring 11. A bore 45 in the block 42 is co-axial with the bore 24 in the ring 11. An elongate carrier 46 extends through the bores 45, 24 and mounts the sensors 28, 29 face-to face in opposite directions. A further screw 47 is received in a wall of the block 42 to penetrate. the bore 45 and the screw can be used to adjustably locate with the carrier 46.
In the assernbiies and arrangements depicted in the drawings and described hereinbefore there is two encoders and two sensors. In Figure 10 a modified arrangement is depicted which uses three encoders and three sensors. Thus in Figure 10 a first encoder 21 is mounted on an outer end surface 35 of the cage 18 and takes a radial orientation. A second encoder 23 is rnounted on the inwardly directed end face 48 of the cage 19 in confronting relationship to the encoder 21 and iikewise take a radial orientation. The encoders 21, 23 are in radial alignment but spaced apart axially. A third encoder 49 is mounted on a support ring 50 fitted in a shallow recess 51 in the inner surface of the inner ring 10. The third encoder 49 takes an axial orientation.
The sensors associated with the encoders are again supported by a common housing located in their bore 24 in the outer bearing ring 11. In this case the radially orientated sensors 28, 29 associated with the encoders 21, 23 are located in an annuler ridge portion. 52 at the end of the housing 25 while a further sensor 53 associated uiith the third encoder 49 and located in an axiai orientation is located centrally of the inner end of the housing 25 within the end ridge portion 52 and radially offset therefrom.
In this field there have been many prior art constructions which can be taken to form the background for the invention. In general, rotary bearings employing sensing arrangements for sensing rotary speed or position can employ a pre-fabricated=
annular component made of polymeric materiai containing ferrous material which is treated to form aitemate north and south magnetic poles, see for example, US Patent 5089817.
Such a component referred to as an encoder can be mounted in the assembly to cause the magnetic poles to pass alongside a sensor, such as a Hall effect sensor, which generates a pulsed electrical signai.
An object of the present invention is to provide improved assemblies and sensing arrangement$ of the aforementioned kind.
Accordingly the present invention provides a wheel bearing assembly composed of Inner and outer bearing rings, one of which is intended to rotate and the other of which Is intended to remain stationary, two sets of rolling elements between the rings and in angular contact with=tracks defined by the rings, each set of rolling elements being spaced in the direction of the axis of rotation with each set of roiiing elements retained by one of two cages and a sensing arrangement composed of at least two annular i encoders with aitemate north and south magnetic poles and at least two sensors operably associated with the encoders and each serving to provide eiectrical signals generated by the passage of the poles of the associated encoder;
wherein one of the encoders is mounted on the rotatable one of the bearing rings and, the other of the encoders is mounted on one of the cages and _.. 2 ~
each of said sensors and encoders is disposed axially, between the sets of rolling elements.
The encoder can be mounted on different components of the assembly such as on one of the cages and on the rotatable bearing ring. This enables the signals generated by the sensors to be compared, for example. The encoders can be orientated with their magnetic poles parallel to the rotational axis thus in an axial orientation or radial to this axis thus In a radial orientation or in both axial and radial orientations.
The sensors and encoders may be built into the bearing in a protected position between the sets; of rolling elements. To locate the sensors use can be made of a housing or a mounting'as described hereinafter.
In other embodiments the sensors and encoders lie outboard of the bearing and the wheei assembiy for ease of installation or removal. A second aspeCt of the present invention provides a wheel bearing -assembly composed of inner and outer bearing rings, one of which is intended to rotate and the other of which is intended to remain stationary, sets of rolling elements between the rings and in angular contact with tracks defined by the rings, the sets of rolling elements being spaced in the direction of the axis of rotation with each set of rolling elements retained by a cage and a sensing arrangement composed of at least two annular encoders with altemate north and south magnetic poles and at least two sensprs operably associated with the encoders and each serving to provide electrical signals generated by the passage of the poles of the associated encoder;
wherein one of the encoders is mounted on the rotatable one of the bearing rings and, the other of the encoders is mounted on one of the cages and wherein the inner bearing ring is secured onto a wheel hub, a cover is located on the other bearing ring to enclose the sensors and is carried by an axial portion of the cover.
'T'he invention may be understood more readily, and various other aspects and features of the Invention may become apparent, from consideration of the foliowing descript-on.
Wheel bearing assembiies embodying the invention will now be described, by way of examples only, with reference to the accompanying drawings, wherein:
Figure 1 is a schematic sectional side view of a first embodiment of a wheel bearing assembly;
Figure 2 is an enlarged view of part of the assembly shown in Figure 1;
Figure 3 is a schematic sectional side view of a second embodiment of a=wheel bearing assembly;
Figure 4 is a schematic sectional side view of a third embodiment of a wheel bearing assembly, Figure 5 is a schematic sectional side view of a fourth embodiment of a wheei bearing assembly, i S Figure 6 is a schematic sectional side view of a fifth embodiment of a wheel bearing assembly, Figure 7 is a schematic sectional side view of a sixth embodiment of a wheel bearing assembly, Figure 8 is a schematic sectional side view of a seventh embodiment of a wheel bearing assembly Figure 9 is a schematic sectional side view of an eighth embodiment of a wheel bearing assembly. The constniction of the various wheel bearing assemblies 9 illustrated throughout the accompanying drawings is well known parse and like reference, numerals are used to designate the same components.
Refercing initially to Figure 1, there is an inner bearing ring 10, an outer beartng ring 11 and two sets or rows of rolling elements in the form of balls 12 therebetween.
The bails 12 make angular contact with ninning tracks 13, 14 in the rings 10, 11. In this assembiy, the right-hand or innermost track 14 of the ring 10 is actually formed by a separate support 15 located in a recess 8 in the inner ring 10. A wheel hub is fixed to or integral with the inner ring 10 and receives a nut 16 which locates on the support 15. A
detachable pressing fits into an outer projecting region 5 of the outer ring 11 and acts as a cover 6 for the nut 16. At the opposite left-hand or outemnost end regions of the rings 10, 11 there is a seal 17. Each set of balls 12 is fitted into a cage 18, 19 made of plastics materiaL As is known, the cages 18, 19 maintain separation between the balls 12 and guide the balls 12 making up each set for progression around the tracks 13, 14.
During use, the inner rina 10 rotates with the wheel hub whilst the outer ring 11 = remains stationary. The balls 12 progressively roll in relation to the tracks 13, 14.
In accordance with the invention, the assembly 9 is equipped with a sensing arrangement designed to provide an indication of rotary speed or positlon_ As shown in Figures 1 and 2, the cage 19 has an axial projection 20 which extends outwardly towards the other ball set. A first pre-formed annular encoder 21 with aitemate axially-orientated north and south magnetic poles is fitted onto an axial surface 22 of the projection 20 to confront the inner surface of the outer ring 11, A second pnr-formed annular encoder 23 with afterrmate north and south axially-orientated magnetic poles is fitted onto the inner surface of the inner bearing ring 10. The encoders 21. 23 are axially and radially offset in relation to one another.
A radial bore 24 in the oqter ring 11 receives a housing 25, As shown in Figure 2, the inner end of the housing 25 has a stepped profile with end wafls 26, 27 offset in the radial direction. The end walls 26, 27 mount sensors 28, 29 which detect the passage of the magnetic poles of the encoders 21, 23 and provide pulsed electrical signals with a repetition frequency depending on the movement of the poles of the encoders 21, 23.
- $ -The signals ere carried on leads 30, 31 connected with the sensors 28, 29_ The signals from the sensor 28 represent the rotary speed of the cage 19 while the signals from the sensor 29 represent the rotary speed of the inner ring 10. The signals can be used in a variety of ways quite separately and independently or combined or compared with one another.
Figure 3 shows a modified form of the sensing arrangement shown in Figures 1 and 2. In this arrangement, the encoder 23 is mounted on a support ring 32 fitted to the inner surface of the inner bearing ring 10 and the magnetic poles of the encoders 22, 23 lie in a common axial plane. The associated sensors 28, 29 are iikewise orientated in a ] 0 common axial plane corresponding to the inner surface of the outer ring 11. The sensors 28, 29 are mounted at the inner end of a bore 24 in the ring 11. The leads 30, 31 are used to support and position the sensors 28, 29 and these leads 30, 31;
emerge from the bore 24.
In the embodiments described and illustrated so far the encoders and sensors 21, 23, 28, 29 are all inboard between the sets of balls 12.
In other constructions the encoders and sensors can be outside the bearing interior. Thus, Figure 4 shows another sensing arrangement with two encoders 21, 23 and two sensors 28, 29. The first encoder 21 is again located on an axial projection 20 of the cage 19 but in this embodiment the projection 20 extends outwardly rather than inwardly. The second encoder 23 is mounted on an axial region of a further L-shaped ring 33 disposed outside the bearing_ A radial region of this ring 33 is clamped by the nut 16 against the support 15. As with the arrangement shown in Figure 3, the magnetic poles of the encoders 21, 23 lie in a common axial plane as do the opposed associated sensors 28, 29 which are now supported on an axial portion 34 of the cover 6.
In the assemblies and arrangements depicted in Figures 1 to 4 the encoders 21.
23 and the sensors 28, 29 are located predominantly in the axial disposition.
Figures 5 and 6 show somewhat different arrangements where the encoders 21. 23 and the sensors 28, 29 take a radial disposition. In the arrangement shown in Figure 5 the encoder 21 is mounted on an outermost radial surface 35 of the outer cage 19 so the magnetic poles take a radial orientation. The encoder 23 is here mounted on a plane washer 36 clamped between the nut 16 and the support 15. As can be seen, the encoders 21, 23 are both axially and radially offset. The associated sensors 28, 29 are likewise axially and radially offset and suspended, for example, by a deformabie sleeving surrounding the leads 30, 31 and bent into an L-shape. The sleeving can be secured to the axial portion 34 of the cover 6 in any suitable fashion.
Figure 6 shows another arrangement with the encoders 21, 23 and the sensors 28, 29 all in a radial orientation. In this arrangement, the encoder 21 is supported on the innermost radial end face 35 of the cage 18. The encoder 23 confronts the encoder 21 and is radially aligned but axially offset with respect to the encoder 21. A
suppOrt ring 39 fits into a recess 43 in the inner surface of the inner bearing ring 10 and the support ring 39 serves to mount the encoder 23. The associated sensors 28, 29 are again ' suspended by their leads 30, 31 in the sensor vicinity of the encoders 21, 23.
The leads 30, 31 pass through the bore 24 in the bearing ring 11.
Figure 7 shows an arrangement where the encoders 21, 23 and the sensors 28, 29 are orientated both radially and axiaiiy_ Thus, the encoder 21 is again mounted on the radial surface 35 of the cage 18 as is in the embodiment shown in Figure 5.
However the washer 36 is now L-shaped with an axial region 37 supporting the encoder 23 in an axial orientation generally normal to the orientation of the encoder 21. A
tubuiar housing again secured to the axial portion 34 of the cover 6 accommodates the s+ensors 28, 29, The.housing 25 has a radially orientated- inner end wall 38 supporting the sensor 28 in the sensing vicinity of the encoder 21 and an axial wall 39 supporting the sensor 29 in 25 the sensing vicinity of the encoder 23.
Figure 8 depicts a similar arrangement to Figure 6 but here the shape and mass of the support ring 37 for the encoder 21 is modified. The ring 39 Is now L-shaped and has an axial flange portion 41 fitted directly to the inner surface of the inner ring 10 which is no longer provided with a recess.
Figure 9 is again similar to the arrangement shown in Figure 8 but here the encoder 21 is fixed to the cage 18 with screws. In this arrangement the mounting of the sensors 28, 29 is achieved with the aid of a mounting bfock 42. The mounting block 42 has a flange 43 affixed with screws 44 to the outer bearing ring 11. A bore 45 in the block 42 is co-axial with the bore 24 in the ring 11. An elongate carrier 46 extends through the bores 45, 24 and mounts the sensors 28, 29 face-to face in opposite directions. A further screw 47 is received in a wall of the block 42 to penetrate. the bore 45 and the screw can be used to adjustably locate with the carrier 46.
In the assernbiies and arrangements depicted in the drawings and described hereinbefore there is two encoders and two sensors. In Figure 10 a modified arrangement is depicted which uses three encoders and three sensors. Thus in Figure 10 a first encoder 21 is mounted on an outer end surface 35 of the cage 18 and takes a radial orientation. A second encoder 23 is rnounted on the inwardly directed end face 48 of the cage 19 in confronting relationship to the encoder 21 and iikewise take a radial orientation. The encoders 21, 23 are in radial alignment but spaced apart axially. A third encoder 49 is mounted on a support ring 50 fitted in a shallow recess 51 in the inner surface of the inner ring 10. The third encoder 49 takes an axial orientation.
The sensors associated with the encoders are again supported by a common housing located in their bore 24 in the outer bearing ring 11. In this case the radially orientated sensors 28, 29 associated with the encoders 21, 23 are located in an annuler ridge portion. 52 at the end of the housing 25 while a further sensor 53 associated uiith the third encoder 49 and located in an axiai orientation is located centrally of the inner end of the housing 25 within the end ridge portion 52 and radially offset therefrom.
Claims (3)
1. A wheel bearing assembly composed of inner and outer bearing rings, one of which is intended to rotate and the other of which is intended to remain stationary, sets of rolling elements between the rings and in angular contact with tracks defined by the rings, the sets of rolling elements being spaced in the direction of the axis of rotation with each set of rolling elements retained by a cage and a sensing arrangement composed of at least two annular encoders with alternate north and south magnetic poles and at least two sensors operably associated with the encoders and each serving to provide electrical signals generated by the passage of the poles of the associated encoder;
wherein one of the encoders is mounted on the rotatable one of the bearing rings and, the other of the encoders is mounted on one of the cages and wherein the inner bearing ring is secured onto a wheel hub, a cover is located on the other bearing ring to enclose the sensors which are carried by an axial portion of the cover.
wherein one of the encoders is mounted on the rotatable one of the bearing rings and, the other of the encoders is mounted on one of the cages and wherein the inner bearing ring is secured onto a wheel hub, a cover is located on the other bearing ring to enclose the sensors which are carried by an axial portion of the cover.
2. An assembly according to claim 1, wherein the sensors are mounted on an elongate carrier adjustably supported in a mounting fitted to the other bearing ring;
wherein the encoder is mounted on the cage of one of the sets of rolling elements and the sensor is mounted on the stationary bearing ring.
wherein the encoder is mounted on the cage of one of the sets of rolling elements and the sensor is mounted on the stationary bearing ring.
3. An assembly according to claim 1, wherein the inner bearing ring is secured with a nut on to the wheel hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2689967 CA2689967C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2464293 CA2464293C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
| CA 2689967 CA2689967C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2464293 Division CA2464293C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2689967A1 CA2689967A1 (en) | 2005-10-13 |
| CA2689967C true CA2689967C (en) | 2012-10-23 |
Family
ID=35253733
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2464293 Expired - Lifetime CA2464293C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
| CA 2689967 Expired - Lifetime CA2689967C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2464293 Expired - Lifetime CA2464293C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2464293C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111148914B (en) * | 2017-09-29 | 2022-06-17 | 黑拉有限责任两合公司 | Bearing comprising an inner ring, an outer ring and a sensor, and system comprising such a bearing |
| DE102021205753A1 (en) * | 2021-06-08 | 2022-12-08 | Mahle International Gmbh | cylinder head cover |
-
2004
- 2004-04-13 CA CA 2464293 patent/CA2464293C/en not_active Expired - Lifetime
- 2004-04-13 CA CA 2689967 patent/CA2689967C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2464293C (en) | 2010-09-14 |
| CA2689967A1 (en) | 2005-10-13 |
| CA2464293A1 (en) | 2005-10-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20240415 |