GB2420182A - Wheel bearing assembly with sensing arrangements mounted outside the assembly - Google Patents

Wheel bearing assembly with sensing arrangements mounted outside the assembly Download PDF

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Publication number
GB2420182A
GB2420182A GB0603444A GB0603444A GB2420182A GB 2420182 A GB2420182 A GB 2420182A GB 0603444 A GB0603444 A GB 0603444A GB 0603444 A GB0603444 A GB 0603444A GB 2420182 A GB2420182 A GB 2420182A
Authority
GB
United Kingdom
Prior art keywords
encoders
sensors
assembly according
bearing ring
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.)
Granted
Application number
GB0603444A
Other versions
GB0603444D0 (en
GB2420182B (en
Inventor
Carlo Roberto Bianco
Ian Taylor Cook
Anthony Francois Patr Gauthier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Europe Ltd
Original Assignee
NSK Europe Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NSK Europe Ltd filed Critical NSK Europe Ltd
Publication of GB0603444D0 publication Critical patent/GB0603444D0/en
Publication of GB2420182A publication Critical patent/GB2420182A/en
Application granted granted Critical
Publication of GB2420182B publication Critical patent/GB2420182B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F16C33/58—Raceways; Race rings
    • 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
    • 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
    • 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

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 10, 11 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 north and south poles which are offset both radially and axially relative to the rotational axis of the bearing rings 10, 11. One of the encoders 23 is mounted on the rotatable bearing ring 10, and the other encoder 21 is mounted on a cage 19. Sensors 28, 29 mounted on a cover 6 located on the outer bearing ring 11 remain stationary to detect the movement of the poles of the respective encoders 21, 23 to generate electrical signals. The sensor encoder pairs may both be orientated axially, may both be orientated radially (figure 2), or may have one pair orientated radially and the other pair orientated axially (figure 4).

Description

ioooij Wheel Bearing Assemblies Incorporating Sensing Arrangements (0002)
The present invention relates to vehicle wheel bearing assemblies and more particularly to such assemblies equipped with sensing arrangements for sensing rotary speed or position.
10003] 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 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 signal. An object of the present invention is to provide improved assemblies and sensing arrangements of the aforementioned kind.
10004) 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, the sets 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 each with alternate north and south magnetic poles and at least two sensors operably associated one each with each of 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 and a cover is located on the outer bearing ring to enclose the sensors which are carried by an axial portion of the cover.
(00051 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. Also the magnetic poles of at least one of the encoders may be orientated radially relative to the rotational axis and the magnetic poles of at least one other of the encoders which is orientated parallel to the rotational axis.
(0006) By virtue of this invention the sensors and encoders lie outboard of the bearing and the wheel assembly for ease of installation or removal.
100071 Embodiments of the invention will now be described, by way of examples only, with reference to the accompanying drawings, wherein: f008) Figure 1 is a sectional side view of a wheel bearing assembly constructed in accordance with the invention; (ocog) Figure 2 is a sectional view of a second embodiment of a wheel bearing assembly according to the invention; (0010) Figure 3 is a sectional view of a third embodiment of the wheel bearing assembly.
(00111 The construction of the various wheel bearing assemblies 9 illustrated throughout the accompanying drawings is well known per se and like reference numerals are used to designate the same components. 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 therebetween. 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 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 outermost 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 ring 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 position. As shown in Figures 1 and 2, the cage 19 has an axial projection 20. 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.
10012] Figure 1 shows two encoders 21, 23 and two sensors 28, 29. The first encoder 21 is located on an axial projection 20 of the cage 19 but in this embodiment the projection 20 extends outwardly. 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.
100131 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.
10014) In the assembly depicted in Figure 1 the encoders 21, 23 and the sensors 28, 29 are located predominantly in the axial disposition. Figure 2 shows a somewhat different arrangements where the encoders 21, 23 and the sensors 28, 29 take a radial disposition. In the arrangement shown in Figure 2 the encoder 21 is mounted on an -; outermost radial surface 35 of the outer cage 19 50 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 deformable 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.
f0015J Figure 3 shows an arrangement where the encoders 21, 23 and the sensors 28, 29 are orientated both radially 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 2. 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 tubular housing 25 again secured to the axial portion 34 of the cover 6 accommodates the sensors 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 the sensing vicinity of the encoder 23.

Claims (7)

  1. Claims [0016] 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, the sets 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 each with alternate north and south magnetic poles and at least two sensors operably associated one each with each of the encoders and each serving [00171 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, 100181 the other of the encoders is mounted on one of the cages and wherein the inner bearing ring is secured onto a wheel hub and a cover is located on the outer bearing ring to enclose the sensors which are carried by an axial portion of the cover.
    100191
  2. 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 one of the encoders is mounted on the cage of one of the sets of rolling elements and the associated sensor is mounted on the stationary bearing ring.
    [0020)
  3. 3. An assembly according to claim 1 wherein the inner bearing ring is secured with a nut on to the wheel hub.
    100211
  4. 4. An assembly according to any of claims I to 3 wherein each of the sensors and encoders are orientated axially.
    100221
  5. 5. An assembly according to any one of claims 1 to 3 wherein each of the sensors and encoders is oriented radially.
    100231
  6. 6. An assembly according to any one of claims 1 to 3 wherein one pair of the associated sensors and encoders is oriented radially and one pair of associated sensors and encoders is oriented axially (0024)
  7. 7. An assembly according to claim 1 and as herein described with reference to the accompanying figures.
GB0603444A 2001-11-16 2001-11-16 Wheel bearing incorporating sensing arrangements Expired - Lifetime GB2420182B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0127580A GB2382142B (en) 2001-11-16 2001-11-16 Wheel bearing assemblies incorporating sensing arrangements

Publications (3)

Publication Number Publication Date
GB0603444D0 GB0603444D0 (en) 2006-04-05
GB2420182A true GB2420182A (en) 2006-05-17
GB2420182B GB2420182B (en) 2006-07-19

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GB0603444A Expired - Lifetime GB2420182B (en) 2001-11-16 2001-11-16 Wheel bearing incorporating sensing arrangements
GB0127580A Expired - Lifetime GB2382142B (en) 2001-11-16 2001-11-16 Wheel bearing assemblies incorporating sensing arrangements

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Application Number Title Priority Date Filing Date
GB0127580A Expired - Lifetime GB2382142B (en) 2001-11-16 2001-11-16 Wheel bearing assemblies incorporating sensing arrangements

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Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602004023836D1 (en) * 2003-05-28 2009-12-10 Nsk Ltd ROTATING DEVICE WITH SENSOR AND PROCEDURE EQUIPPED IN A ROLLER BEARING UNIT
JP4543643B2 (en) 2003-09-12 2010-09-15 日本精工株式会社 Load measuring device for rolling bearing units
JP2005291457A (en) * 2004-04-05 2005-10-20 Nsk Ltd Ball bearing unit
JP4498064B2 (en) * 2004-08-24 2010-07-07 Ｎｔｎ株式会社 Wheel bearing device
JP2006064082A (en) * 2004-08-27 2006-03-09 Jtekt Corp Rolling bearing unit
ITTO20040594A1 (en) 2004-09-09 2004-12-09 Skf Ab BALL BEARING UNIT WITH PERFECTED BALL HOLDING CAGE
JP4942665B2 (en) * 2005-02-01 2012-05-30 ザ ティムケン カンパニー Bearing with sensor mounted on cage
WO2008098594A1 (en) * 2007-02-16 2008-08-21 Ab Skf Multiturn absolute encoding
DE102007029511A1 (en) * 2007-06-26 2009-01-02 Schaeffler Kg Use of a bearing cage or a bearing ring
DE102011075547B4 (en) * 2011-05-10 2016-06-09 Schaeffler Technologies AG & Co. KG Rolling, in particular double row rolling bearing, with an energy generating unit, in particular for supporting a roller
DE102013218184A1 (en) * 2013-09-11 2015-03-12 Schaeffler Technologies Gmbh & Co. Kg Rolling bearing with power generation unit
DE102017109540A1 (en) 2017-05-04 2018-03-01 Schaeffler Technologies AG & Co. KG Rolling bearing assembly with sensor device
DE102018100393A1 (en) * 2018-01-10 2018-12-06 Schaeffler Technologies AG & Co. KG Rolling bearing assembly with sensor device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558223A1 (en) * 1984-01-17 1985-07-19 Roulements Soc Nouvelle Bearing with information sensor.
JPS63176761A (en) * 1987-01-14 1988-07-21 Koyo Seiko Co Ltd Bearing unit of automobile wheel
US5046867A (en) * 1989-10-16 1991-09-10 The Torrington Company Bearing assembly speed sensor
EP0887647A1 (en) * 1997-06-27 1998-12-30 Nsk Ltd Rolling bearing unit with rotational speed sensor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE348839B (en) * 1971-04-21 1972-09-11 Skf Ind Trading & Dev
DE2941564A1 (en) * 1979-10-13 1981-04-23 Metabowerke GmbH & Co, 7440 Nürtingen Electric motor armature spindle speed monitor - uses permanent magnet and tachogenerator to detect magnetic field variation in coil from bearing rotation
EP0395783A1 (en) * 1989-05-05 1990-11-07 Gmn Georg Müller Nürnberg Ag Bearing with sensor for measuring speed of rotation and/or angle of rotation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558223A1 (en) * 1984-01-17 1985-07-19 Roulements Soc Nouvelle Bearing with information sensor.
JPS63176761A (en) * 1987-01-14 1988-07-21 Koyo Seiko Co Ltd Bearing unit of automobile wheel
US5046867A (en) * 1989-10-16 1991-09-10 The Torrington Company Bearing assembly speed sensor
EP0887647A1 (en) * 1997-06-27 1998-12-30 Nsk Ltd Rolling bearing unit with rotational speed sensor

Also Published As

Publication number Publication date
GB2382142A (en) 2003-05-21
GB0127580D0 (en) 2002-01-09
GB0603444D0 (en) 2006-04-05
GB2382142B (en) 2006-05-17
GB2420182B (en) 2006-07-19

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PE20 Patent expired after termination of 20 years

Expiry date: 20211115