WO2020114543A1 - Unité de palier de moyeu de roue d'un véhicule, en particulier d'un véhicule agricole, comprenant des moyens de détection d'une force - Google Patents

Unité de palier de moyeu de roue d'un véhicule, en particulier d'un véhicule agricole, comprenant des moyens de détection d'une force Download PDF

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Publication number
WO2020114543A1
WO2020114543A1 PCT/DE2019/100950 DE2019100950W WO2020114543A1 WO 2020114543 A1 WO2020114543 A1 WO 2020114543A1 DE 2019100950 W DE2019100950 W DE 2019100950W WO 2020114543 A1 WO2020114543 A1 WO 2020114543A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
housing
bearing unit
wheel
measuring
Prior art date
Application number
PCT/DE2019/100950
Other languages
German (de)
English (en)
Inventor
Horst Brehm
Philipp HÖRNING
Jens Heim
Eduard Beresch
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2020114543A1 publication Critical patent/WO2020114543A1/fr

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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/522—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0047—Hubs characterised by functional integration of other elements
    • B60B27/0068—Hubs characterised by functional integration of other elements the element being a sensor
    • 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
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
    • 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
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0078—Hubs characterised by the fixation of bearings
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • 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
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement

Definitions

  • the invention relates to a wheel bearing unit of a vehicle, in particular an agricultural vehicle, comprising a hub for attaching a wheel of the vehicle, the hub being mounted in a housing by means of at least one bearing, means for detecting one from the wheel onto the housing transferred power are present.
  • Measuring systems for measuring wheel force are well known in automobiles and are required in particular to optimize the vehicle's electronic stabilization systems (ESP). Such measuring systems are also necessary for agricultural vehicles, especially tractors. This is due in particular to the fact that the greatest fuel losses (after the engine) occur between the tire and the ground. These losses can be reduced by properly ballasting the agricultural vehicle. However, this requires knowing the force with which the wheel presses on the ground while the vehicle is in use. This force 5 cannot be determined when stationary, rather a wheel contact force measurement in the vehicle is necessary for this.
  • ESP electronic stabilization systems
  • a generic wheel bearing unit is known from DE 10 2009 025 494 B4.
  • a distance sensor is used which detects the distance between the rim and the tire contact patch.
  • the present invention has for its object to provide a generic wheel bearing unit with which it is possible in a simple and effective manner. Lich is able to measure the effective forces from the floor to the housing. Thus, the wheel contact force should be able to be detected in the most precise manner possible with simple means.
  • this object is achieved in a wheel bearing unit according to the preamble of claim 1 such that the means for detecting the force transmitted from the wheel to the housing comprise a measuring ring which is arranged on one of the rings of the bearing and extends over the axial extent of the bearing Extends around the ring and is connected to the housing with an end region, a measuring means for detecting the mechanical tension being arranged in an axial section of the measuring ring, which lies between the ring of the bearing and the connection point with the housing.
  • the measuring means for detecting the mechanical tension is preferably designed as a film sensor which is applied to the measuring ring. It is particularly and preferably provided that the film sensor is applied to the measuring ring by a coating process.
  • the film sensor preferably has, seen from a radial direction on the measuring ring, an at least partially meandering course. In particular, with such a configuration, it is possible to differentiate forces that result from different stress situations.
  • the film sensor preferably has a number of sections which are arranged on the measuring ring in a uniformly distributed manner over the circumference thereof.
  • a training provides that the measuring ring in the axial section, which lies between the ring of the bearing and the connection point with the housing, in its radial thickness in relation to the thickness in the region of the ring of the bearing and reduced to the thickness in the loading area of the junction.
  • Sufficient accuracy of the measurement can hereby be achieved, for which purpose said radial thickness is varied and adapted in the given case. The smaller the thickness, the greater the stresses in the measuring range; the exact determination of the voltages becomes correspondingly easier.
  • the film sensor can be irreversibly damaged if the measuring ring is deformed too much, and in particular if it deforms plastically.
  • a further development of the invention advantageously provides that the measuring ring is arranged in its area of axial extension of the ring of the bearing in the no-load state with a radial gap for the receiving bore in the housing. This gap can be, for example, in the range between 0.5 mm and 3.0 mm.
  • the measuring ring It is chosen so large that the measuring ring can move freely in the area of the measurement, however, if higher loads are introduced, care is taken to ensure that the measuring ring comes into contact in the area of the mounting hole for the bearing and is thus prevented. that it is plastically deformed.
  • a corresponding procedure can also be provided with regard to overload protection in the axial direction.
  • a further development provides that the measuring ring axially engages over the ring of the bearing and radially encompasses it with a radially extending section.
  • the measuring ring is radial extending section is arranged in the load-free state with an axial gap to an axial contact surface in the housing.
  • the measuring ring is still in the area of its connection point with the housing on an axial contact surface of the housing.
  • the intended gaps are thus designed such that they are larger than zero in the regular measuring range of the measuring ring. If the measuring range is exceeded due to excessive loads (misuse loads), the measuring ring comes into contact with the housing (the gap is then reduced to zero) so that the measuring ring is prevented from being destroyed.
  • the meandering design of the film sensor in particular makes it easier to differentiate the forces in the different axial directions.
  • the evaluation of the signals enables the voltages to be measured and the wheel contact forces isolated from the lateral forces to be calculated.
  • the outer ring of the bearing is stationary in the case of tractor wheel bearings, there is advantageously no telemetry (i.e. data transmission from the rotating component to the stationary component).
  • several bearings of the wheel bearing arrangement of the (in particular agricultural) vehicle i.e. the mostly existing inner and outer bearings
  • a corresponding sensor system so that there is a broad basis for data collection.
  • the disadvantages of the known solutions described above can thus be overcome.
  • the proposed wheel bearing unit is preferably used in agricultural vehicles.
  • generally mobile work machines such as construction machines or industrial trucks, can be equipped according to the invention.
  • FIG. 1 shows the side view of an agricultural vehicle in the form of a tractor
  • Figure 2 shows the radial section through a wheel bearing unit of the tractor
  • FIG. 1, FIG. 3 the side view of a measuring ring of the wheel bearing unit according to a first embodiment of the invention
  • FIG. 4 shows the side view of the measuring ring of the wheel bearing unit according to a second embodiment of the invention
  • FIG. 5 shows the side view of the measuring ring of the wheel bearing unit according to a third embodiment of the invention
  • FIG. 6 shows the side view of the measuring ring of the wheel bearing unit according to a fourth embodiment of the invention
  • FIG. 7a shows the side view or the radial section of the measuring ring of the wheel bearing unit according to a fifth embodiment of the invention
  • FIG. 7b shows the section B-B according to FIG. 7a.
  • FIG. 1 shows an agricultural vehicle 17 in the form of a tractor.
  • the indicated section AA indicates from which area of the tractor is spoken in connection with the embodiment, namely the wheel bearing in the present case of the rear wheels.
  • the proposed concept can also be used analogously on the front wheels.
  • FIG. 2 A part of the wheel bearing is shown in Figure 2, namely a Radla geratti 1, which has a hub 2 to which a wheel 3 is attached.
  • the hub 2 is mounted relative to a housing 5 by means of a bearing 4, as corresponds to the prior art.
  • the wheel bearing unit 1 is further provided with means 6, 7 with which a force transmitted from the wheel 3 to the housing 5 can be detected or measured.
  • an electronic evaluation unit (not shown) is required, which is connected to the means 6, 7.
  • the means for detecting the force initially comprise a measuring ring 6.
  • This essentially consists of four axial sections: a section of the measuring ring 6 extends over the outer cylindrical surface of the outer ring 8 of the bearing 4 and bears against it. Another section (far right in FIG. 2) surrounds the outer ring 8 of the bearing 4 with a radially extending section 13. Another section (far left in FIG. 2) extends over the area of a connection point 10 where the measuring ring 6 in a receiving bore of the housing 5 and axially abuts against a contact surface 16 in the housing. Finally there is an axial section 9 which is weakened in radial thickness in relation to the other sections.
  • This section 9 is seen with a measuring means 7 in the form of film sensors ver, which is applied to the measuring ring.
  • the measuring device can detect mechanical stresses in the measuring ring 6, which in turn are dependent on the forces that are transmitted from the hub 2 to the housing 5.
  • the measuring ring lies firmly in the area of the connection point 10 in a receiving bore of the housing 5 and firmly against the outer circumference of the outer ring 8 of the bearing 4; the measuring ring also surrounds the outer ring 8 of the bearing 4 with its section 13. that between the measuring ring 6 in the area of the axial extension of the outer ring 8 of the bearing 4 to the receiving bore 12 in the housing 5 in the load-free state there was a radial gap 11. If large forces are transmitted from the hub 2 to the housing 5, the measuring ring 6 accordingly comes into contact with the receiving bore 12, as a result of which an overloading of the measuring ring 6 is avoided. After the measuring ring 6 has been placed on the receiving bore 12 in consequence of high forces, the forces are then introduced virtually around the measuring ring 6 into the housing 5, so that the measuring ring remains protected.
  • the measuring ring 6 lies with its radially extending section 13 in an internal radial section on an axial contact surface 15 in the housing 5. Meanwhile, the section 13 is exposed in its radially outer region when there is no load, so that there is an axial gap 14 to an axial bearing surface 18 in the housing.
  • the measuring ring 6 with its section 13 can come into contact with the contact surface 18 in order to avoid overloading the measuring ring 6.
  • the axial force transmission takes place via the contact surface 16 and the measuring ring 6 to the contact surface 18.
  • FIGS. 3 to 7 show different possibilities for the configuration of the film sensor 7 in the area of the axial section 9 of the measuring ring 6.
  • Figure 3 it can first be seen how a number of film sensors 7 are arranged distributed over the circumference of section 9 and each run in a meandering manner.
  • the film sensor is designed here as a “Sensotect” coating, which is applied to section 9.
  • This coating is processed in such a way that the meandering structure shown arises, which can be done, for example, by milling or punching off an initially applied layer of the film sensor, so that only the meandering structure shown remains.
  • section 9 is interrupted in the circumferential direction (by means of circular breakouts), which can increase the sensitivity of section 9.
  • the meandering film sensors 7 are placed here.
  • FIG. 5 A similar embodiment is shown in FIG. 5, from which it can be seen that section 9 is weakened with bores, while film sensors 7 are applied in the remaining area.
  • FIG. 6 illustrates one possibility of designing section 9, two different possibilities being recognizable in the upper and the lower section of the figure. It follows from this that the section 9 does not have to have a constant thickness in the radial section, but can also be made concave or convex. In the upper region of FIG. 6, the section 9 is provided with a concave surface both radially on the outside and radially inwards, while in the lower region of FIG. 6 the combination of a concave surface with a convex design is provided in the radially outer or radially inner region. Such a configuration can be helpful in order to avoid voltage peaks.
  • FIG. 7 A further alternative design of section 9 is illustrated in FIG. 7:
  • the section here has an outer surface which is designed polygonally, in particular as a hexagonal or octagonal design. Such an octagonal design can be seen in FIG. 7b.
  • the film sensors 7 are located on the outer circumference of the section 9. The advantage of this embodiment is that the film sensors 7 can be applied to straight surfaces on the outside of the section 9, which has manufacturing advantages.

Abstract

L'invention concerne une unité de palier de roue (1) d'un véhicule, en particulier d'un véhicule agricole, comprenant un moyeu (2) pour le montage d'une roue (3) du véhicule, le moyeu (2) étant logé dans un carter (5) au moyen d'au moins un palier (4), des moyens (6, 7) pour la détection d'une force transmise de la roue (3) au carter (5) étant prévus. Selon l'invention, pour pouvoir mesurer de manière simple les forces agissant du sol sur le carter, les moyens (6, 7) comprennent un anneau de mesure (6), lequel est disposé sur un des anneaux (8) du palier (4) et s'étend au-delà de l'extension axiale de l'anneau (8) et est connecté par une zone d'extrémité au carter (5), un instrument de mesure (7) pour la détection de la tension mécanique étant disposé dans une partie axiale (9) de l'anneau de mesure (6) située entre l'anneau (8) du palier (4) et le point de liaison (10) avec le carter (5).
PCT/DE2019/100950 2018-12-07 2019-11-05 Unité de palier de moyeu de roue d'un véhicule, en particulier d'un véhicule agricole, comprenant des moyens de détection d'une force WO2020114543A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018131265.2 2018-12-07
DE102018131265.2A DE102018131265A1 (de) 2018-12-07 2018-12-07 Radlagereinheit eines Fahrzeugs, insbesondere eines landwirtschaftlichen Fahrzeugs

Publications (1)

Publication Number Publication Date
WO2020114543A1 true WO2020114543A1 (fr) 2020-06-11

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PCT/DE2019/100950 WO2020114543A1 (fr) 2018-12-07 2019-11-05 Unité de palier de moyeu de roue d'un véhicule, en particulier d'un véhicule agricole, comprenant des moyens de détection d'une force

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DE (1) DE102018131265A1 (fr)
WO (1) WO2020114543A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2452925A1 (de) * 1974-11-07 1976-05-13 Erich Brosa Zugkraftmesslager
DE8610226U1 (fr) * 1986-04-11 1987-08-13 Lechler, Gerhard, Dr.-Ing., 1000 Berlin, De
DE8816453U1 (fr) * 1988-07-02 1989-07-27 Koenig & Bauer Ag, 8700 Wuerzburg, De
WO2007089642A1 (fr) * 2006-01-26 2007-08-09 The Timken Company Extrémité de roue
DE102009025494B4 (de) 2009-06-19 2012-07-19 Grasdorf Wennekamp Gmbh Vorrichtung und Verfahren zur Optimierung der lastabhängigen Reifeneinfederung bei Fahrzeugreifen von land-und forstwirtschaftlichen Fahrzeugen
WO2013104981A1 (fr) * 2012-01-13 2013-07-18 Agco International Gmbh Boîtier d'ensemble d'essieu
DE102013110311A1 (de) 2013-09-19 2015-03-19 Claas Tractor Sas Sensoranordnung zum Erfassen einer mechanischen Beanspruchung eines Bauteils eines landwirtschaftlichen Fahrzeugs
DE102013222151A1 (de) * 2013-10-31 2015-04-30 Schaeffler Technologies Gmbh & Co. Kg Vorrichtung zur Kraftmessung im Wälzlager mittels Sensorschicht
DE102013222150A1 (de) * 2013-10-31 2015-04-30 Schaeffler Technologies Gmbh & Co. Kg Überwachungsmodul mit messendem Lager zum Erfassen eines Betriebszustands, insbesondere von Bodenbearbeitungsgeräten
DE102014204130B3 (de) * 2014-03-06 2015-06-18 ME-Meßsysteme GmbH Kraftmessvorrichtung mit Drehlager
DE102015218993B3 (de) * 2015-10-01 2016-12-22 Schaeffler Technologies AG & Co. KG Lageranordnung mit einer Dehnungssensoreinrichtung

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2452925A1 (de) * 1974-11-07 1976-05-13 Erich Brosa Zugkraftmesslager
DE8610226U1 (fr) * 1986-04-11 1987-08-13 Lechler, Gerhard, Dr.-Ing., 1000 Berlin, De
DE8816453U1 (fr) * 1988-07-02 1989-07-27 Koenig & Bauer Ag, 8700 Wuerzburg, De
WO2007089642A1 (fr) * 2006-01-26 2007-08-09 The Timken Company Extrémité de roue
DE102009025494B4 (de) 2009-06-19 2012-07-19 Grasdorf Wennekamp Gmbh Vorrichtung und Verfahren zur Optimierung der lastabhängigen Reifeneinfederung bei Fahrzeugreifen von land-und forstwirtschaftlichen Fahrzeugen
WO2013104981A1 (fr) * 2012-01-13 2013-07-18 Agco International Gmbh Boîtier d'ensemble d'essieu
DE102013110311A1 (de) 2013-09-19 2015-03-19 Claas Tractor Sas Sensoranordnung zum Erfassen einer mechanischen Beanspruchung eines Bauteils eines landwirtschaftlichen Fahrzeugs
DE102013222151A1 (de) * 2013-10-31 2015-04-30 Schaeffler Technologies Gmbh & Co. Kg Vorrichtung zur Kraftmessung im Wälzlager mittels Sensorschicht
DE102013222150A1 (de) * 2013-10-31 2015-04-30 Schaeffler Technologies Gmbh & Co. Kg Überwachungsmodul mit messendem Lager zum Erfassen eines Betriebszustands, insbesondere von Bodenbearbeitungsgeräten
DE102014204130B3 (de) * 2014-03-06 2015-06-18 ME-Meßsysteme GmbH Kraftmessvorrichtung mit Drehlager
DE102015218993B3 (de) * 2015-10-01 2016-12-22 Schaeffler Technologies AG & Co. KG Lageranordnung mit einer Dehnungssensoreinrichtung

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