EP1368627A1 - Detection sans derivation d'une grandeur mesuree sur un element accelere sur un palier radial (jante sur palier de roue) - Google Patents

Detection sans derivation d'une grandeur mesuree sur un element accelere sur un palier radial (jante sur palier de roue)

Info

Publication number
EP1368627A1
EP1368627A1 EP01990357A EP01990357A EP1368627A1 EP 1368627 A1 EP1368627 A1 EP 1368627A1 EP 01990357 A EP01990357 A EP 01990357A EP 01990357 A EP01990357 A EP 01990357A EP 1368627 A1 EP1368627 A1 EP 1368627A1
Authority
EP
European Patent Office
Prior art keywords
rotatable
bearing
sensing device
arrangement according
bearing shell
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.)
Withdrawn
Application number
EP01990357A
Other languages
German (de)
English (en)
Inventor
Klaus Dobler
Erich Zabler
Anton Dukart
Martin Borsik
Dietmar Arndt
Gottfried Flik
Hans-Peter Trah
Volker Imhof
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1368627A1 publication Critical patent/EP1368627A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0009—Force sensors associated with a bearing
    • G01L5/0019—Force sensors associated with a bearing by using strain gages, piezoelectric, piezo-resistive or other ohmic-resistance based sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/11—Mounting of sensors thereon
    • B60G2204/115—Wheel hub bearing sensors

Definitions

  • the invention relates to an arrangement for detecting physical measured variables, in particular forces, torques, mechanical stresses and / or accelerations on a wheel bearing of a motor vehicle, according to the preamble of the main claim.
  • the unpublished application DE 100 41 098.7 proposes a sensor arrangement in a roller bearing, with which during the movement of a rotatable component guided in the roller bearing, measurement variables, in particular forces or torques, transmitted to the roller bearing are recorded.
  • strain gauges in the rolling bearing with which mechanical stresses, which a bearing le of the rolling bearing is exposed, can be detected in cooperation with electronic components also integrated in the rolling bearing.
  • the strain gauges are arranged above all in the area of the outer bearing shell of the roller bearing and in some cases also in the area of the bearing flange or in the area of force-carrying parts of the attachment of the fixed bearing parts of the roller bearing and are connected together, for example in the form of measuring bridges or voltage divider circuits.
  • a disadvantage of known roller bearings with an integrated sensing device is the force shunt which is always present via the brake system of the motor vehicle, so that during a braking operation those forces which are transmitted from the road to the vehicle no longer correspond to the forces occurring in the wheel bearing and measured there are identical.
  • such an undesirable force shunt via the brake system leads to the fact that forces emanating from the tire or the rim of the motor vehicle only partly on the wheel bearing, but also partly at the same time are transmitted to the brake system, so that the measured variables recorded by the sensor system integrated in the wheel bearing, in particular when the brake is actuated at the same time, have only a limited significance with regard to the forces actually acting on the tires of the vehicle.
  • Brake disc known.
  • the wheel bearing is designed in such a way that it enables a simple, also floating design of the brake disc, and at the same time always ensures adequate ventilation of the brake disc.
  • the object of the present invention was to measure as precisely as possible a physical measured variable emanating from a rotatable component, for example a tire of a motor vehicle, and transmitted to a radial bearing, for example a wheel bearing of a motor vehicle, the transmitted variable being a transmitted mechanical, a transmitted mechanical Voltage, a torque and / or an acceleration is relevant. Furthermore, it was an object of the invention to enable this measurement to be carried out independently of the actuation of the brake, and thus to always obtain reliable information about the entire measurement variable emanating from the rotatable component.
  • the arrangement according to the invention for the detection of physical measured variables has the advantage over the prior art that, due to the relative arrangement of the sensing device for actually detecting this measured variable and the further device for influencing the rotational speed of the rotatable component relative to one another, a force bypass from the rotatable component to the further device is prevented, so that rotatable component at least almost exclusively transfers the physical measured variable to be determined to the radial bearing, where it can then be determined continuously or, if necessary, independently of the further device, for example the actuation state of the brake system.
  • the radial bearing has a rotatable bearing shell, the sensing device being connected to the end face and the further device to the side face of the rotatable bearing shell. If the rotatable component is then further connected to the end face of the rotatable bearing shell, for example, forces exiting from the rotatable component act directly at least approximately only on the area of the end face of the rotatable bearing shell, where they are detected by the sensing device located there, while the further device for influencing the rotational speed of the rotatable component is only connected to the side surface of the rotatable bearing shell, and thus at least For example, forces exerted there on the bearing shell cannot act directly on the end face with the sensing device.
  • this arrangement ensures that forces originating from the further device initially act on the rotatable component and not on the area of the sensing device, while forces emerging from the rotatable component initially act on the area of the sensing device, i.e. if the rotational speed of the rotatable component is influenced by a force caused by the further device, at least approximately a part of this force is not transmitted directly from the further device to the sensing device.
  • the rotatable bearing shell is pot-shaped or can-shaped, and if the further device, for example in the form of a brake disc, surrounds the side face of this can-shaped or pot-shaped bearing shell or is connected to it there.
  • Strain-sensitive sensors such as strain gauges and / or strain gauge resistance bridge circuits, as are known from the prior art, are particularly suitable for detecting the physical measured variables transmitted from the rotatable component to the radial bearing. These strain-sensitive sensors are then advantageously located in the area of the end face of the rotatable bearing shell.
  • the sensing device With regard to simple preparation and further processing of the physical measured variable detected by the sensing device, it is advantageous if it already has a treatment arranged there or integrated in the bearing shell in the region of the end face of the rotatable bearing shell. has a processing unit with which the initially recorded physical measured variable can be amplified and, particularly advantageously, transferred from the rotating coordinate system of the rotatable bearing shell to a stationary, for example vehicle-fixed, coordinate system.
  • the transmission of the detected or processed physical measurement variable from the sensing device to the vehicle then takes place either via a slip ring known per se, or particularly advantageously, without contact or telematically.
  • FIG. 1 explains the basic flow of force in a motor vehicle from the road to the chassis or body according to the prior art.
  • FIG. 2 shows how this flow of force is modified according to the invention.
  • FIG. 3 explains a schematic diagram of a tire of a motor vehicle with a radial bearing and a brake disk attached to the radial bearing, while FIG. 4 shows in section a schematic diagram of the rotatable bearing shell of the wheel bearing with the brake disk connected to it and the sensing device applied on the face side.
  • FIG. 1 explains the flow of force in a motor vehicle according to the prior art, a force or acceleration acting on the tires of the motor vehicle from a roadway 10 first of all from the roadway 10 onto the tire patch 11, from there to the tire side 12 and from there is transferred to the rim 13.
  • the rim 13 is then connected on the one hand to a rotating wheel bearing part 14 or a rotatable bearing shell 14, but on the other hand lies also a force shunt from the rim 13 to the brake disc 16 of the brake system of the motor vehicle, so that the rim 13 does not transfer all of the force acting on it to the rotatable part of the wheel bearing 14.
  • FIG. 1 further shows how the force acting on the rotatable wheel bearing part 14 first passes to the fixed wheel bearing part 15 and from there to the wheel carrier 18, while at the same time part of the force transmitted from the rim 13 to the brake disc 16 from the brake disc 16 is transferred to the brake caliper 17 and from there again to the wheel carrier 18. The acting forces are then transmitted on the one hand from the wheel carrier 18 to the control arm or trailing arm 19, the suspension 21, the track rod 22 and stabilizers 23, which they ultimately transmit to the vehicle body 20.
  • An essential part of the present invention is the change in the force flow according to FIG. 1, in that the force shunt from the rim 13 to the brake disc 16 is at least largely prevented, so that at least approximately the entire force or acceleration acting on the rim 13 is reduced Transfer rim 13 to the rotating wheel bearing part 14 and can be measured there.
  • FIG. 2 which differs from FIG. 1 only in that there is no direct power transmission or power flow from the rim 13 to the brake disc 16, i.e.
  • the forces, torques or mechanical stresses emanating from the rim 13 are first completely transmitted to the rotating wheel bearing part 14 and only then from there to the fixed wheel bearing part 14 or the brake disc 16.
  • the tire 24 of a motor vehicle shows, which is located on a rim 13.
  • This rim 13 is connected with the aid of screws 25 to a rotatable bearing shell 14 of a radial bearing, for example a roller bearing, which in the specific case forms part of the wheel bearing of the motor vehicle.
  • the rotatable bearing shell 14 is at least approximately pot-shaped or can-shaped, the rim 13 being screwed to the end face 26 of the pot-shaped or can-shaped, rotatable bearing shell 14 with the screws 25, while the brake disk 16 is screwed to the side face 27 , ie the outer surface of the can-shaped, rotatable bearing shell 14 is screwed. It is also shown in FIG. 3 that the fixed part of the radial bearing 15 is connected to the vehicle axle.
  • the rotatable bearing shell 14 is preferably designed in such a way that the brake disc 16 can be connected to it reliably and easily, for example by screwing. This is in
  • Figure 4 shows how the brake disc 16 is connected by screws 29 to the rotatable bearing shell 14 on the side surface. It is also shown there that the connection of the rim 13 to the end face 26 of the rotatable bearing shell 14 takes place, for example, via bores 28 made therein.
  • the brake disk 16 is only connected to the cylindrical side surface 27 of the can-shaped, rotatable bearing shell 14, a force or mechanical tension emanating from the brake disk 16 does not at least approximately lead to a change in the tension state of the end face 26 of the rotatable Bearing shell 14, so that the end face 26 remains approximately unaffected by an instantaneous braking torque or forces exerted by the braking system. It is thus achieved that the rim 13 is only received by those areas of the rotatable bearing shell 14 whose elastic tension state is not dependent on the actuation of the brake or the force currently exerted on the wheel bearing by the brake disc 16, so that a direct Power transmission between rim 13 and brake disc 16 is omitted.
  • strain gauge bridge measuring circuits can also be provided in the area of the end face 26, in which case, in a preferred embodiment of the invention, a processing unit (not shown in FIGS. 3 and 4) is also arranged or integrated with which the respective of the arranged on the end face 26 sensing device, ie in In the specific case of the strain gauge 30, the physical measured variable, on the one hand, is amplified and, particularly advantageously, is simultaneously transferred from the rotating coordinate system of the rotatable bearing shell 14 to a stationary, in particular vehicle-fixed, coordinate system.
  • strain gauges 30 With regard to the specific embodiment of the strain gauges 30, reference is made, for example, to the applications DE 100 41 093.6 or DE 100 41 098.7, where such arrangements and the structure and function of strain gauges are described in detail.
  • the section through the rotatable bearing shell 14 according to FIG. 4 also shows that strain gauges 30 are arranged on the surface of the end face 26 of the rotatable bearing shell 14, with which mechanical stresses, forces, torques or accelerations are transmitted from the rim 13 to this end face 26 are detectable.
  • strain gauges 30 or the processing unit are electrically connected to a transmission component (also not shown), for example a slip ring, so that the physical measured variable detected by the strain gauges 30 or the strain gauges 30 supplied to the processing unit via this transmission component and the physical measured variable prepared there can be fed to a stationary, in particular vehicle-fixed, processing unit.
  • a transmission component also not shown, for example a slip ring
  • a particularly advantageous embodiment provides that the physical measured variable detected by the strain gauges 30, possibly after preparation, instead of the slip ring of the vehicle-fixed connector work unit is transmitted contactlessly or telemetrically.
  • a microcontroller (not shown) is integrated on the rotating bearing shell 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

L'invention concerne la détection de forces, de couples, de tensions et/ou d'accélérations sur un palier de roue (14, 16) d'automobile. Un palier de roue (14, 15) comporte une jante (13) avec un pneu (23), ainsi qu'un disque de frein (16). Ledit disque de frein (16) et des jauges d'allongement (30) sont montés sur la coquille de coussinet (14) de manière que les forces exercées par le disque de frein (16) ne soient pas mesurées de manière approximative. Seules les forces exercées par le pneu (24) et la jante (13) sont mesurées.
EP01990357A 2001-01-19 2001-12-20 Detection sans derivation d'une grandeur mesuree sur un element accelere sur un palier radial (jante sur palier de roue) Withdrawn EP1368627A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10102236A DE10102236A1 (de) 2001-01-19 2001-01-19 Anordnung zur Erfassung physikalischer Messgrößen, insbesondere an einem Radlager eines Kraftfahrzeuges
DE10102236 2001-01-19
PCT/DE2001/004846 WO2002057730A1 (fr) 2001-01-19 2001-12-20 Detection sans derivation d'une grandeur mesuree sur un element accelere sur un palier radial (jante sur palier de roue)

Publications (1)

Publication Number Publication Date
EP1368627A1 true EP1368627A1 (fr) 2003-12-10

Family

ID=7671031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01990357A Withdrawn EP1368627A1 (fr) 2001-01-19 2001-12-20 Detection sans derivation d'une grandeur mesuree sur un element accelere sur un palier radial (jante sur palier de roue)

Country Status (5)

Country Link
US (1) US20030019303A1 (fr)
EP (1) EP1368627A1 (fr)
JP (1) JP2004517337A (fr)
DE (1) DE10102236A1 (fr)
WO (1) WO2002057730A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20020653A1 (it) * 2002-07-24 2004-01-26 Skf Ind Spa Monitoraggio del carico assiale gravante sul mozzo della ruota di un veicolo a motore
DE10323889A1 (de) * 2003-05-27 2004-12-16 Ehrfeld Mikrotechnik Ag Wälzlager mit Polymerelektronik
DE102004012770B4 (de) 2004-03-15 2006-04-20 Ab Skf Einrichtung zum Befestigen an einem Rad und Rad mit der Einrichtung
DE102005032222A1 (de) * 2005-07-09 2007-01-25 Schaeffler Kg Lageranordnung zur Lagerung wenigstens eines Maschinenelements an einer Stütze
DE102006049494B3 (de) * 2006-10-17 2008-04-10 Benteler Automobiltechnik Gmbh Radaufhängung
DE102006053432A1 (de) * 2006-11-14 2008-05-15 Schaeffler Kg Messeinrichtung zur kontinuierlichen Erfassung von Betriebsparametern an Radsätzen von Schienenfahrzeugen
DE102010047928A1 (de) 2010-10-08 2012-04-12 Schaeffler Technologies Gmbh & Co. Kg Wälzlager zum rotativen Lagern eines Maschinenelementes
DE102015111201A1 (de) * 2015-07-10 2017-01-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rad, Prüfstand und Verfahren zur Ermittlung von aerodynamischen Kennwerten
EP3239686A1 (fr) * 2016-04-26 2017-11-01 Walter Steven Rosenbaum Procédé de détermination de caractéristiques de conduite d'un véhicule
DE102021203714B3 (de) 2021-04-15 2022-08-25 Zf Friedrichshafen Ag Prüfstand für einen Antriebsstrang eines Kraftfahrzeugs

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298223A (en) * 1965-01-21 1967-01-17 Budd Co Torque sensing wheel structure
US5488871A (en) * 1994-02-16 1996-02-06 The Timken Company Bearing adjustment using compressive force sensor
DE19650477C1 (de) * 1996-12-05 1998-04-30 Daimler Benz Ag Meßeinrichtung zur Messung des Bremsmomentes bei einem Kraftfahrzeug
DE60131571T2 (de) * 2000-04-10 2008-10-23 The Timken Company, Canton Lageranordnung mit sensoren zur überwachung von lasten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02057730A1 *

Also Published As

Publication number Publication date
DE10102236A1 (de) 2002-08-01
JP2004517337A (ja) 2004-06-10
US20030019303A1 (en) 2003-01-30
WO2002057730A1 (fr) 2002-07-25

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