CA2464293C - Wheel bearing assemblies incorporating sensing arrangements - Google Patents
Wheel bearing assemblies incorporating sensing arrangements Download PDFInfo
- Publication number
- CA2464293C CA2464293C CA 2464293 CA2464293A CA2464293C CA 2464293 C CA2464293 C CA 2464293C CA 2464293 CA2464293 CA 2464293 CA 2464293 A CA2464293 A CA 2464293A CA 2464293 C CA2464293 C CA 2464293C
- Authority
- CA
- Canada
- Prior art keywords
- encoders
- assembly according
- sensors
- encoder
- magnetic poles
- 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 8
- 238000000429 assembly Methods 0.000 title description 8
- 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 3
- 239000000463 material Substances 0.000 description 3
- 235000016936 Dendrocalamus strictus Nutrition 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241001233242 Lontra Species 0.000 description 1
- 230000000694 effects 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
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
__~_..
Whee! Bearing Assemblies lneorporating Sensing Arrangements aaoaa2az The present invention relates to vehicle wheel bearing assemblies and more particularly to such assemblies equipped with sensing arrangements for sensing rotary speed or positian_ 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 material containing ferrous material which is treated to form alternate north and south magnetic poles, see for example, US Patent SD8981 ~.
Such a component referred to as an encoder can be mounfed in the assembly'to cause the magnetic poles to pass alongside a sensor, such as s Ball effect sensor, which generates a pulsed electrical signal, An object of the present invention is to provide improved assemblies and sensing 1 S arrangements 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 rolling elements retained by one of two cages and a sensing arrangement composed of at least two annular encoders with alternate north and south magnetic poles and at feast 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 e~ne of the cages and A40402d1 each of said sensors and encoders is disposed axially, between the sets of roiling elements.
The encoder can be mounted on different components of the assembly such as on one of the cages and on the rotatabte bearing ring. This enables the signals generated by the sensors to be compared, for example. The encoder. can be orientated with their magnetic poles parallel to the rotakional axis thus in an axiial 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 wheel assembljr 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 1 S 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 direckion of the axis of rotation with each set of rolling elements retained by a cage and a sensing arrangement composed of at least fwo 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 i~ mounted an one of the cages and wherein the inner ZS bearing ring is secured onto a wheel hub, a cover is located on the other bearing ring to enclose the sensors and is carcied by an axial portion of the cover.
._ 3 __ A40402d1 The invention may be understood more readily, and various other aspects and features of the invention may become apparent, from consideration of the following description.
Wheel bearing assemblies 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 embt~diment 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 seckional side view of a fourth embodiment of a wheel bearing assembly, 1 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 2t) bearing assembly Figure 9 is a schematic sectional side view of an eighth embodiment of a wheel bearing assembly. ::
The construction of the various wheel bearing assemblies 9 illustrated throughout the accompanying drawings is well known parse and like reference, numerals are used 25 to designate the same components.
A40402d1 Referring initially to Figure 1, there is an inner bearing ring 10, an outer bearing ring 11 and two sets or rows of rolling elements in the form of balls 12 therebeiween.
The balls 12 make angular contact with running tracks 13, 14 in the rings 10, 11. In this assembly, the right-hand or innermost track 14 of the ring 10 is actually formed by a S 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 fi for the nut 16_ At the opposite left-hand or outermost end regions of the rings 10, 11 there is. a seat 17. Each set of balls 12 is fitted into a cage 18, 1 J
made of plastics material. As is known, the cages 18, 19 maintain separation between the bans 12 and guide the balls 12 making up each sei for progression around the tracks 1~, 14.
During use, the inner ring 10 rotates with the wheel hub whilst the outer ring 11. remains stationary. The balls 12 progressively roll in relation to the tracks l3, 14.
In accordance with the invention, the assembly 9 is equipped with a sensing arrangement designed to provide an indication of rotary speed or position. 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 alternate 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 pre-formed annular encoder 23 2(? with alternate north and south axially-orientated magnetic poles is fitted onto the inner surface of the inner bearing ring i 0. The encoders 29 , 23 are axially and' radially offset in relation to one another.
A radial bare 24 in the otter ring 11 receives a housing 25. As shown in Figure 2, the inner end of the housing 25 has a stepped profile with end walls 26, 27 offset in the radial direction. The end walls 25, 27 mount sensors 28, 2E~ 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 rnavement of the poles of the encoders 21, 23.
__ g __ A40402d1 The signals are tarried on leads 30, 31 connected With the sensors 28, ~9_ The signals from the sensor 28 represent the rotary speed of the cage 19 while the signals from the sensor 29 represeht 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 mod~ed form of the sensing arrarlgement shown in Figures 1 and 2. In this arrangement, the encoder 23 is mounted on a suppork 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 likewise orientated in a common axial plane Corresponding to the inner surface of the outer ring 11 _ The sensors 28, 29 ace mounted at the inner end of a bore 2~4. in the ring 11. The lads 30, 31 are used to support and position the sensors 28, 29 and these leads 30, 31emerge from the bore 24_ In the embodiments described and illustrated so far the encoders and sensors 21, 1S 23, 28, 29 are all inboard between the sets of balls 12.
In other constructions the encoders and sensors can be outside the bearing interlor_ 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 2U inwardly. The second encoder 23 is mounted on an axial region of a further LTshaped ring 33 disposed outside the bearing. ~l radial region of this ring 33 is clamped by the nut 16 against the support 16. As with the arrangement shown in Figure 3, t#~e magnetit poles of the encoders 21, 23 lie in a common axial plane as do the opposed associated sensors 28, 29 which are now supported an an axial portion 34 ~f the cover 6.
25 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 2i , 23 and the __ 6 __ A40~02d1 sensors 28, 29 take a radial disposition. In the arrangement shown in Figure S
the encoder 21 is mounted on an outermost radial surtace 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 16. As can be seen, the encoders 21, 23 are both axially and radially offset. The associated sensors 28, 29 are likewise axially and radiatly offset and suspended, for example, by a deformable sleeving surrounding the leads 30, 31 and bent into an f_-shape. The sieeving can be secured to the axial portion 34 of the cover fi in any suitable fashion.
Figure 6 shows another arrangement with the encoders 21, 23 and the sensors 2$, 29 all in a radial orientation. In this arrangement, the encoder 21 is supported nn the innermost radial end face 35 of the cage 18. The encoder 23 confronts the encoder 21 and is radialiy aligned but axially ofFset with respect to the encoder 21. A
support ring 39 fits into a recess 43 in the inner surface of the inner bearing ring 1 Q and the support ring 39 serves to mount the encoder 23. The associated sensors 2$, 29 are again suspended by their leads 30, 31 iri 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 radiaiiy and axially_ 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 !_-shaped wi#h an axial region 37 supporting the encoder 23 in an axial orientation generally normal to the orientation of the encoder 21. A
tubular housing again secured to the axial portion 34 of the cover f accommodates the sensors 28, 29, The.housing 25 has a radially orientated' inner end wall 3$ supporting the sensor 28 in the sensing vicinity of the encoder 21 and an axial wall 3'9 supporting the sensor 29 in 25 the sensing vicinity of the encoder 23.
Figure 8 depicts a similar arrangement to Figure $ E~ui: 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 __ 7 __ A40402d1 an axial ftangE portion 41 fitted directly to the inner surface of the inner ring 1 O 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. fn this arrangement the mounting of the sensors 28, 29 is achieved with the aid of a mounting block 42. The mounting block 42 has a flange 48 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, 291'ace-to-face in opposite directions. A further sctew 47 is received in a wall of the bloclr 42 to penetrate, the bore 4S and the screw can be used to adjustably locate with the carrier 4C.
In the assertlblies and arrangements depicted in the dnav~imgs and described heteinbefore 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 3S of the cage 18 and fakes a radial orientation_ A second encoder 23 is mounted on the inwardly directed end face 48 of the cage 19 in confronting relationship to the encoder 21 and likewise 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 S1 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 s 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 (orated in an annular ridge portion 52 at the end of tire housing 25 while a further sensor 53 associated vriith the third encoder 49 and located in 3n axial orientation is located centrally of the inner end of the housing 25 within the end ridge portion 52 and radially offset therefrom_
Whee! Bearing Assemblies lneorporating Sensing Arrangements aaoaa2az The present invention relates to vehicle wheel bearing assemblies and more particularly to such assemblies equipped with sensing arrangements for sensing rotary speed or positian_ 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 material containing ferrous material which is treated to form alternate north and south magnetic poles, see for example, US Patent SD8981 ~.
Such a component referred to as an encoder can be mounfed in the assembly'to cause the magnetic poles to pass alongside a sensor, such as s Ball effect sensor, which generates a pulsed electrical signal, An object of the present invention is to provide improved assemblies and sensing 1 S arrangements 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 rolling elements retained by one of two cages and a sensing arrangement composed of at least two annular encoders with alternate north and south magnetic poles and at feast 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 e~ne of the cages and A40402d1 each of said sensors and encoders is disposed axially, between the sets of roiling elements.
The encoder can be mounted on different components of the assembly such as on one of the cages and on the rotatabte bearing ring. This enables the signals generated by the sensors to be compared, for example. The encoder. can be orientated with their magnetic poles parallel to the rotakional axis thus in an axiial 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 wheel assembljr 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 1 S 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 direckion of the axis of rotation with each set of rolling elements retained by a cage and a sensing arrangement composed of at least fwo 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 i~ mounted an one of the cages and wherein the inner ZS bearing ring is secured onto a wheel hub, a cover is located on the other bearing ring to enclose the sensors and is carcied by an axial portion of the cover.
._ 3 __ A40402d1 The invention may be understood more readily, and various other aspects and features of the invention may become apparent, from consideration of the following description.
Wheel bearing assemblies 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 embt~diment 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 seckional side view of a fourth embodiment of a wheel bearing assembly, 1 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 2t) bearing assembly Figure 9 is a schematic sectional side view of an eighth embodiment of a wheel bearing assembly. ::
The construction of the various wheel bearing assemblies 9 illustrated throughout the accompanying drawings is well known parse and like reference, numerals are used 25 to designate the same components.
A40402d1 Referring initially to Figure 1, there is an inner bearing ring 10, an outer bearing ring 11 and two sets or rows of rolling elements in the form of balls 12 therebeiween.
The balls 12 make angular contact with running tracks 13, 14 in the rings 10, 11. In this assembly, the right-hand or innermost track 14 of the ring 10 is actually formed by a S 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 fi for the nut 16_ At the opposite left-hand or outermost end regions of the rings 10, 11 there is. a seat 17. Each set of balls 12 is fitted into a cage 18, 1 J
made of plastics material. As is known, the cages 18, 19 maintain separation between the bans 12 and guide the balls 12 making up each sei for progression around the tracks 1~, 14.
During use, the inner ring 10 rotates with the wheel hub whilst the outer ring 11. remains stationary. The balls 12 progressively roll in relation to the tracks l3, 14.
In accordance with the invention, the assembly 9 is equipped with a sensing arrangement designed to provide an indication of rotary speed or position. 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 alternate 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 pre-formed annular encoder 23 2(? with alternate north and south axially-orientated magnetic poles is fitted onto the inner surface of the inner bearing ring i 0. The encoders 29 , 23 are axially and' radially offset in relation to one another.
A radial bare 24 in the otter ring 11 receives a housing 25. As shown in Figure 2, the inner end of the housing 25 has a stepped profile with end walls 26, 27 offset in the radial direction. The end walls 25, 27 mount sensors 28, 2E~ 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 rnavement of the poles of the encoders 21, 23.
__ g __ A40402d1 The signals are tarried on leads 30, 31 connected With the sensors 28, ~9_ The signals from the sensor 28 represent the rotary speed of the cage 19 while the signals from the sensor 29 represeht 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 mod~ed form of the sensing arrarlgement shown in Figures 1 and 2. In this arrangement, the encoder 23 is mounted on a suppork 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 likewise orientated in a common axial plane Corresponding to the inner surface of the outer ring 11 _ The sensors 28, 29 ace mounted at the inner end of a bore 2~4. in the ring 11. The lads 30, 31 are used to support and position the sensors 28, 29 and these leads 30, 31emerge from the bore 24_ In the embodiments described and illustrated so far the encoders and sensors 21, 1S 23, 28, 29 are all inboard between the sets of balls 12.
In other constructions the encoders and sensors can be outside the bearing interlor_ 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 2U inwardly. The second encoder 23 is mounted on an axial region of a further LTshaped ring 33 disposed outside the bearing. ~l radial region of this ring 33 is clamped by the nut 16 against the support 16. As with the arrangement shown in Figure 3, t#~e magnetit poles of the encoders 21, 23 lie in a common axial plane as do the opposed associated sensors 28, 29 which are now supported an an axial portion 34 ~f the cover 6.
25 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 2i , 23 and the __ 6 __ A40~02d1 sensors 28, 29 take a radial disposition. In the arrangement shown in Figure S
the encoder 21 is mounted on an outermost radial surtace 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 16. As can be seen, the encoders 21, 23 are both axially and radially offset. The associated sensors 28, 29 are likewise axially and radiatly offset and suspended, for example, by a deformable sleeving surrounding the leads 30, 31 and bent into an f_-shape. The sieeving can be secured to the axial portion 34 of the cover fi in any suitable fashion.
Figure 6 shows another arrangement with the encoders 21, 23 and the sensors 2$, 29 all in a radial orientation. In this arrangement, the encoder 21 is supported nn the innermost radial end face 35 of the cage 18. The encoder 23 confronts the encoder 21 and is radialiy aligned but axially ofFset with respect to the encoder 21. A
support ring 39 fits into a recess 43 in the inner surface of the inner bearing ring 1 Q and the support ring 39 serves to mount the encoder 23. The associated sensors 2$, 29 are again suspended by their leads 30, 31 iri 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 radiaiiy and axially_ 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 !_-shaped wi#h an axial region 37 supporting the encoder 23 in an axial orientation generally normal to the orientation of the encoder 21. A
tubular housing again secured to the axial portion 34 of the cover f accommodates the sensors 28, 29, The.housing 25 has a radially orientated' inner end wall 3$ supporting the sensor 28 in the sensing vicinity of the encoder 21 and an axial wall 3'9 supporting the sensor 29 in 25 the sensing vicinity of the encoder 23.
Figure 8 depicts a similar arrangement to Figure $ E~ui: 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 __ 7 __ A40402d1 an axial ftangE portion 41 fitted directly to the inner surface of the inner ring 1 O 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. fn this arrangement the mounting of the sensors 28, 29 is achieved with the aid of a mounting block 42. The mounting block 42 has a flange 48 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, 291'ace-to-face in opposite directions. A further sctew 47 is received in a wall of the bloclr 42 to penetrate, the bore 4S and the screw can be used to adjustably locate with the carrier 4C.
In the assertlblies and arrangements depicted in the dnav~imgs and described heteinbefore 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 3S of the cage 18 and fakes a radial orientation_ A second encoder 23 is mounted on the inwardly directed end face 48 of the cage 19 in confronting relationship to the encoder 21 and likewise 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 S1 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 s 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 (orated in an annular ridge portion 52 at the end of tire housing 25 while a further sensor 53 associated vriith the third encoder 49 and located in 3n axial orientation is located centrally of the inner end of the housing 25 within the end ridge portion 52 and radially offset therefrom_
Claims (10)
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, 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 rolling elements retained by one of two cages 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 each of said sensors and encoders is disposed axially, between the sets of rolling elements.
2. An assembly according to claim 1, wherein the magnetic poles of the encoders are orientated parallel to the rotational axis.
3. An assembly according to claim 1, wherein the magnetic poles of the encoder are orientated radially relative to the rotational axis.
4. An assembly according to claim 1, wherein the magnetic poles of at least one of the encoders are orientated radially relative to the rotational axis and the magnetic poles of at least one other of the encoders are orientated parallel to the rotational axis.
5. An assembly according to claim 1, wherein the encoders are spaced in a radial and an axial sense.
6. An assembly according to claim 1, wherein the encoders are spaced axially but aligned radially in relation to the rotational axis.
7. An assembly according to claim 1, wherein the encoder mounted on said rotatable race is mounted on a component mounted onto said race.
8. An assembly according to claim 1, wherein the sensors are mounted in a housing fitted into a bore in the other stationary bearing ring so the housing locates the sensor in sensing vicinity to the associated encoders.
9. An assembly according to claim 1, wherein the sensors are mounted in a bore in the other stationary bearing ring.
10. An assembly according to claim 1 wherein a third encoder is mounted for rotation on the other of the cages.
Priority Applications (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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2464293 CA2464293C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2689967 Division CA2689967C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2464293A1 CA2464293A1 (en) | 2005-10-13 |
| CA2464293C true CA2464293C (en) | 2010-09-14 |
Family
ID=35253733
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2689967 Expired - Lifetime CA2689967C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
| CA 2464293 Expired - Lifetime CA2464293C (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 2689967 Expired - Lifetime CA2689967C (en) | 2004-04-13 | 2004-04-13 | Wheel bearing assemblies incorporating sensing arrangements |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2689967C (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 2689967 patent/CA2689967C/en not_active Expired - Lifetime
- 2004-04-13 CA CA 2464293 patent/CA2464293C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2689967C (en) | 2012-10-23 |
| CA2689967A1 (en) | 2005-10-13 |
| CA2464293A1 (en) | 2005-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7484892B2 (en) | Wheel bearing assemblies incorporating sensing arrangements | |
| EP1041387B1 (en) | Combination seal ring with encoder | |
| US6328476B2 (en) | Rolling bearing unit with encoder | |
| US5863124A (en) | Rolling bearing unit having tone wheel | |
| US5434503A (en) | Device for radial detection of the rotational speed of a rolling-contact bearing, with an encoding element, a sensor element and a sensor holder, and bearing equipped with such device | |
| EP1436152B1 (en) | Rotation-support apparatus with rotation sensor device for drive-wheel | |
| GB2420182A (en) | Wheel bearing assembly with sensing arrangements mounted outside the assembly | |
| US6174088B1 (en) | Rolling bearing unit with rotation speed sensor | |
| US20030218457A1 (en) | Axle unit for a vehicle | |
| CN1512943A (en) | Rotary support for wheel with encoder | |
| JP3656530B2 (en) | Combination seal ring with encoder and rolling bearing unit for wheel support incorporating this | |
| JP2004084848A (en) | Roller bearing device | |
| CA2464293C (en) | Wheel bearing assemblies incorporating sensing arrangements | |
| JP5098730B2 (en) | Rotational speed detection device for motorcycle wheels | |
| US5755517A (en) | Bearing having a seal with build-in encoder and wheel hub incorporating such bearing | |
| JP2004211832A (en) | Bearing device corresponding to sensor | |
| AU2004201553B2 (en) | Wheel bearing assemblies incorporating sensing arrangements | |
| JP2008256079A (en) | Wheel supporting bearing unit with sensor | |
| JP2004190736A (en) | Bearing device for wheel | |
| JP2004061271A (en) | Rotation detecting ring and ball bearing apparatus | |
| JP2007247718A (en) | Rolling bearing and seal member | |
| EP1371991B1 (en) | Device for determining the rotational speed of a bearing | |
| GB2388431A (en) | Wheel bearing sensing arrangement | |
| GB2372820A (en) | Rolling bearing unit with rotation speed sensor | |
| JP2003021156A (en) | Assembly forming roller bearing with information detecting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |