EP0804738A2 - Device for measuring rotational movements - Google Patents

Device for measuring rotational movements

Info

Publication number
EP0804738A2
EP0804738A2 EP95942139A EP95942139A EP0804738A2 EP 0804738 A2 EP0804738 A2 EP 0804738A2 EP 95942139 A EP95942139 A EP 95942139A EP 95942139 A EP95942139 A EP 95942139A EP 0804738 A2 EP0804738 A2 EP 0804738A2
Authority
EP
European Patent Office
Prior art keywords
sensor
housing
flange
teeth
shaped
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.)
Ceased
Application number
EP95942139A
Other languages
German (de)
French (fr)
Inventor
André F. L. GOOSSENS
André De WITTE
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.)
Continental Teves AG and Co OHG
Original Assignee
Alfred Teves Metallwarenfabrik GmbH and Co OHG
Alfred Teves 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 Alfred Teves Metallwarenfabrik GmbH and Co OHG, Alfred Teves GmbH filed Critical Alfred Teves Metallwarenfabrik GmbH and Co OHG
Publication of EP0804738A2 publication Critical patent/EP0804738A2/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0005—Hubs with ball 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
    • 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
    • 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
    • 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
    • F16C19/185—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 two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
    • 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
    • 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

Definitions

  • the invention relates to a device provided for measuring rotary movements, with a signal transmitter executing the rotary movement to be measured, with a stationary sensor serving as a measured value sensor and with a sensor receiving housing which accommodates the sensor, positions it and holds it in this position that the sensor is insertable.
  • Such a measuring device is already known from De 42 06 910 AI (P 7301), which essentially consists of a signal transmitter ring, a stationary sensor and a housing serving as a sensor holder.
  • the sensor is plugged into the housing and is positioned and held there in a predetermined position. It is preferably a wheel bearing sensor.
  • the sensor and sensor housing of such a wheel bearing sensor are arranged in the axis of rotation of the wheel, the rotational movement of which is to be detected.
  • a ring-shaped or pot-shaped component with internal teeth, which rotates with the wheel, serves as the signal generator.
  • the sensor has a double-sided measuring coil, from which pole shoes protrude on both sides and extend to the inner surface of the signal transmitter. In this case too, the sensor is inserted into the associated sensor receptacle housing.
  • Wheel bearing sensors of this type are required, for example, in the motor vehicle to measure the rotational speeds of the individual vehicle wheels if the vehicle is equipped with an anti-lock control or traction control system or another vehicle control system. In such applications, the reliable method of operation, but also the manufacturing and assembly costs, play a major role.
  • the invention is based on the object of constructing a bearing sensor or a measuring device of this type in such a way that the production outlay and the time required for positioning and for locking the sensor in the predetermined angular position and axial position are comparatively low.
  • the special feature of the invention thus consists in the configuration of the sensor receptacle housing, in particular the flange on the insertion side of this housing, and the shape of the corresponding flange formed on the sensor. Thanks to the shape, the receptacle housing can be produced particularly easily and with little effort, for example as a deep-drawn sheet metal part, and - by punching recesses etc. - can be machined.
  • a positioning in the given angular position and a springy interlocking of the flanges and thereby a secure holding in the exactly given angular and axial position is automatically guaranteed.
  • FIG. 1 shows a longitudinal section through a wheel bearing with a sensor holder and an inserted sensor according to an embodiment of the invention
  • FIG. 2 shows an enlarged partial representation of a possibility for designing the two flanges, namely the flange on the sensor receptacle housing and the flange on the sensor, for the exemplary embodiment according to FIG. 1,
  • FIG. 5 shows, in the same representation as FIG. 4, a further exemplary embodiment of the flange of a sensor receiving housing
  • FIG. 7 schematically, in section and developed a section from the peripheral surface of the flange connection according to Fig. 6.
  • Fig. 1 serves to explain the basic structure and arrangement of a wheel bearing sensor or a measuring device according to the invention in the axis of rotation of a vehicle wheel.
  • the wheel bearing 1 essentially consists of a wheel bearing outer ring 2, a wheel bearing inner ring 3 and bearing balls 4. A part of a wheel shaft 5, which is seated in the wheel bearing inner ring 3, is also shown.
  • the axis of rotation A of the wheel bearing 1 is shown symbolically by a dash-dotted line.
  • a sensor receiving housing 6 which is preferably designed in the form of a rotationally symmetrical deep-drawn sheet metal part, is rigidly connected to the stationary wheel bearing outer ring 2, which is fastened to the vehicle. According to an exemplary embodiment of the invention, it is provided that this sheet metal part or the sensor receptacle housing 6 is attached to the wheel bearing outer ring 2 by a snug fit or a press fit.
  • a sensor 7 serving as a sensor, which is inserted here in the sensor housing and is positioned and held by this housing in the given axial and angular position.
  • the sensor 7 contains a double-sided measuring coil 8; Such measuring coils are known for example from the document DE 42 13 977 AI mentioned at the beginning. Pole shoes 9 protrude from this coil on both sides, which reach as far as the inner surface of a signaling ring 10 serving as a measuring value transmitter, which is connected to the wheel bearing inner ring 3 and consequently to the wheel or the axle 5, its or its rotational movement to be measured, rotet.
  • the signal generator ring 10 is with teeth or elevations facing inwards.
  • the fastening, positioning and locking of the sensor 7 in the sensor receptacle housing 6 is essential to the invention.
  • the embodiment of this connection selected in the present exemplary embodiment is illustrated in FIG. 2.
  • the sensor receptacle housing 6 ends on the receiving side for the sensor 7 in a radially outwardly pointing, annular Flange 11.
  • a flange 12 is formed on the sensor 7.
  • this flange 12 of the sensor ends in individual snap hooks 13 which are evenly distributed over the circumference of this flange - cf. 1 and 2 -, which have a section 14 running parallel to the axis of rotation A of the arrangement.
  • the individual snap hooks 13 and their sections 14 end in a hook-shaped, inward-pointing bead 15 which extends over the flange 11 of the sensor receptacle housing 6.
  • the sensor flange 12 finds a firm hold on the flange 11 of the sensor receptacle housing 6.
  • the predetermined angular position of the sensor 7 in the sensor receptacle housing 10 is predefined in a simple manner in the exemplary embodiment according to FIGS. 3 and 4, which can be identical to the exemplary embodiment according to FIGS. 1 and 2, using a positioning wedge 16, the one in a corresponding Recess 17 - cf. Fig. 4 - engages in the radially outward-facing flange 11 - see Fig. 2 - of the sensor housing 6. If the sensor receptacle housing 6 is a deep-drawn sheet metal part, as is the case here, this recess 17 in the ring-shaped flange 11 of the receptacle is most easily produced by punching out.
  • the flange of the sensor receptacle housing is tough at its radially outward-pointing flange parts on the receptacle side for the sensor 7 ⁇ NEN 18, which are perpendicular to the axis of rotation of the wheel bearing and thus also the sensor 7 plane surface B of this flange 11 '.
  • the individual teeth are thus arranged at an acute angle W of inclination to the flat surface B or to the surface spanned by the annular flange 11 ', as can be seen particularly clearly from FIG. 7.
  • the deviation caused by the angling is indicated in FIG. 6 by the dashed lines of the tooth cross section 18 '.
  • the flange 12 'formed on the sensor 7 ends in tines 19 which are distributed around the circumference and which, as shown in FIG. 6, encompass and engage behind the individual teeth 18, when the sensor receptacle housing 6' protrudes there is resilient material, the sensor flange 12 'is resiliently held on the flange of the sensor receptacle housing or on the teeth 18'.
  • the teeth 18 on the flange 12 'of the sensor receiving housing 6' are evenly distributed over the circumference, so that uniformly wide tooth gaps 20 are formed. hen, with the exception of an enlarged tooth gap 21, which is used here to determine the angular position of the sensor 7 in the sensor receptacle.
  • the sensor flange 12 ' is namely divided in its radially outward-pointing sections in such a way that when the sensor 7 is inserted into the receiving housing, the sensor flange 12' engages in the tooth gaps 20, 21 and that after a rotary movement - cf.
  • FIG. 7 also shows a hook 22 which is part of one of the two flanges, i.e. the flange on the sensor housing or the sensor flange. After the inserted sensor has been rotated, the hook 22 engages in a corresponding opening in the counter flange and thereby secures the sensor against unintentional loosening.
  • the insertion of the sensor 7 into the sensor receptacle housing and thus the sensor flange into the tooth space and the subsequent rotation of the sensor 7 has the function of an attachment by means of a multi-start thread.
  • the hook 22 is expediently designed in the form of a spiral spring which springs outwards when the sensor is rotated in the housing and thereby forms the lock against the sensor being turned back. After pushing back this spring with a pin, the sensor can be turned out of the housing. This type of assembly is free of play; the position The angular position is simple and precise and does not require any tools.
  • the sensor flange is preferably a plastic injection molded part, which can be produced in one operation together with the sensor sheathing.

Abstract

The invention concerns a device for measuring rotary movements comprising essentially the following elements: a signal transmitter (10) which rotates with the object; a stationary measured value transducer or sensor (7); and a sensor housing (6, 6') which houses, positions and secures the sensor (7) and into which the sensor can be inserted. The sensor housing (6, 6') is a rotationally symmetrical body such as a deep-drawn metal unit. The sensor housing (6, 6') is provided with a flange (11, 11') which when the sensor is inserted and rotated engages with a flange (12, 12') on the sensor and is positioned.

Description

Vorrichtung zur Messung von DrehbewegungenDevice for measuring rotary movements
Die Erfindung bezieht sich auf eine zur Messung von Drehbewe¬ gungen vorgesehene Vorrichtung, mit einem die zu messende Drehbewegung ausführenden Signalgeber, mit einem ortsfesten, als Meßwertaufnehmer dienenden Sensor und mit einem den Sen¬ sor aufnehmenden, positionierenden und in dieser Position haltenden Sensoraufnahmegehäuse, in das der Sensor einsteck¬ bar ist.The invention relates to a device provided for measuring rotary movements, with a signal transmitter executing the rotary movement to be measured, with a stationary sensor serving as a measured value sensor and with a sensor receiving housing which accommodates the sensor, positions it and holds it in this position that the sensor is insertable.
Aus der De 42 06 910 AI (P 7301) ist bereits eine derartige Meßvorrichtung bekannt, die im wesentlichen aus einem Sig¬ nalgeberring, einem ortsfesten Sensor und aus einem als Sensorhalter dienenden Gehäuse besteht. Der Sensor wird in das Gehäuse eingesteckt und dort in vorgegebener Lage posi¬ tioniert und gehaltert. Es handelt sich dabei vorzugsweise um einen Radlagersensor.Such a measuring device is already known from De 42 06 910 AI (P 7301), which essentially consists of a signal transmitter ring, a stationary sensor and a housing serving as a sensor holder. The sensor is plugged into the housing and is positioned and held there in a predetermined position. It is preferably a wheel bearing sensor.
Nach der DE 42 13 977 AI (P 7322) sind Sensor und Sensorge¬ häuse eines solchen Radlagersensors in der Drehachse des Ra¬ des, dessen Drehbewegung erfaßt werden soll, angeordnet. Als Signalgeber dient ein ringförmiges oder topfför iges Bauteil mit Innenverzahnung, das sich mit dem Rad dreht. Der Sensor besitzt eine doppelseitige Meßspule, aus der beidseitig Pol¬ schuhe herausragen und bis zur Innenfläche des Signalgebers reichen. Auch in diesem Fall wird der Sensor in das zugehöri¬ ge Sensoraufnahmegehäuse eingesteckt. Radlagersensoren dieser Art werden z.B. im Kraftfahrzeug zur Messung der Drehgeschwindigkeiten der einzelnen Fahrzeugräder benötigt, wenn das Fahrzeug mit einer Blockierschutz- oder Antriebsschlupfregelung oder einem anderen Fahrzeug-Rege¬ lungssystem ausgerüstet ist. Bei solchen Einsatzzwecken spie¬ len die zuverlässige Arbeitsweise, aber auch die Herstellungs- und Montagekosten eine große Rolle.According to DE 42 13 977 AI (P 7322), the sensor and sensor housing of such a wheel bearing sensor are arranged in the axis of rotation of the wheel, the rotational movement of which is to be detected. A ring-shaped or pot-shaped component with internal teeth, which rotates with the wheel, serves as the signal generator. The sensor has a double-sided measuring coil, from which pole shoes protrude on both sides and extend to the inner surface of the signal transmitter. In this case too, the sensor is inserted into the associated sensor receptacle housing. Wheel bearing sensors of this type are required, for example, in the motor vehicle to measure the rotational speeds of the individual vehicle wheels if the vehicle is equipped with an anti-lock control or traction control system or another vehicle control system. In such applications, the reliable method of operation, but also the manufacturing and assembly costs, play a major role.
Der Erfindung liegt nun die Aufgabe zugrunde, einen Lagersen¬ sor bzw. eine Meßvorrichtung dieser Art solchermaßen aufzu¬ bauen, daß der Herstellungsaufwand ebenso wie der Zeitbedarf für die Positionierung und für das Arretieren des Sensors in der vorgegebenen Winkellage und Axialposition vergleichsweise gering werden.The invention is based on the object of constructing a bearing sensor or a measuring device of this type in such a way that the production outlay and the time required for positioning and for locking the sensor in the predetermined angular position and axial position are comparatively low.
Es hat sich gezeigt, daß diese Aufgabe durch die im Anspruch 1 beschriebene Meßvorrichtung gelöst werden kann. Einige be¬ sonders vorteilhafte Ausführungsbeispiele der Erfindung sind" in den Unteransprüchen genannt.It has been shown that this object can be achieved by the measuring device described in claim 1. Some Sonder be¬ advantageous embodiments of the invention are recited in the dependent claims. "
Das Besondere der Erfindung besteht also in der Ausgestaltung des Sensoraufnahmegehäuses, vor allem des Flansches an der Einsteckseite dieses Gehäuses, und der Formgebung des ent¬ sprechenden, am Sensor angeformten Flansches. Dank der Form¬ gebung läßt sich das Aufnahmegehäuse besonders einfach und mit geringem Aufwand produzieren, z.B. als tiefgezogenes Blechteil, und - durch Stanzen von Ausnehmungen usw. - be¬ arbeiten. Beim Einstecken des Sensors in das Sensorauf¬ nahmegehäuse ist automatisch eine Positionierung in der vor¬ gegebenen Winkellage und ein federndes Ineinandergreifen der Flansche und dadurch ein sicheres Halten in der exakt vor¬ gegebenen Winkel- und Axiallage gewährleistet. Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten der Erfindung gehen aus der folgenden Beschreibung von Ausfüh- rungsbeispielen und Einzelheiten anhand der beigefügten Ab¬ bildungen hervor.The special feature of the invention thus consists in the configuration of the sensor receptacle housing, in particular the flange on the insertion side of this housing, and the shape of the corresponding flange formed on the sensor. Thanks to the shape, the receptacle housing can be produced particularly easily and with little effort, for example as a deep-drawn sheet metal part, and - by punching recesses etc. - can be machined. When the sensor is inserted into the sensor receptacle housing, a positioning in the given angular position and a springy interlocking of the flanges and thereby a secure holding in the exactly given angular and axial position is automatically guaranteed. Further advantages, features and possible uses of the invention will become apparent from the following description of exemplary embodiments and details on the basis of the attached illustrations.
Es zeigen in vereinfachter DarstellungsweiseThey show in a simplified representation
Fig. 1 einen Längsschnitt durch ein Radlager mit einer Sen¬ soraufnahme und einem eingesteckten Sensor gemäß ei¬ nem Ausführungsbeispiel der Erfindung,1 shows a longitudinal section through a wheel bearing with a sensor holder and an inserted sensor according to an embodiment of the invention,
Fig. 2 in vergrößerter Teildarstellung eine Möglichkeit zur Ausgestaltung der beiden Flansche, nämlich des Flan¬ sches am Sensoraufnahmegehäuse und des Flansches am Sensor, für das Ausführungsbeispiel nach Fig. 1,FIG. 2 shows an enlarged partial representation of a possibility for designing the two flanges, namely the flange on the sensor receptacle housing and the flange on the sensor, for the exemplary embodiment according to FIG. 1,
Fig. 3 in Seitenansicht und im Querschnitt einen Sensor der erfindungsgemäßen Meßvorrichtung," 3 in side view and in cross section a sensor of the measuring device according to the invention, "
Fig. 4 in Einzeldarstellung den Flansch des Sensorauf- nah egehäuses des Ausführungsbeispiels nach Fig. 3,4 in individual representation the flange of the sensor receptacle housing of the exemplary embodiment according to FIG. 3,
Fig. 5 in gleicher Darstellungsweise wie Fig. 4 ein weiteres Ausführungsbeispiel des Flansches eines Sensorauf¬ nahmegehäuses,5 shows, in the same representation as FIG. 4, a further exemplary embodiment of the flange of a sensor receiving housing,
Fig. 6 in gleicher Darstellungsweise wie Fig. 2 die Verbin¬ dungsstelle zwischen den Flanschen des Sensorauf¬ nahmegehäuses und des Sensors bei der Ausführungsart der Erfindung nach Fig. 5, und6, in the same representation as FIG. 2, the connection point between the flanges of the sensor receptacle housing and the sensor in the embodiment of the invention according to FIG. 5, and
Fig. 7 schematisch, im Schnitt und abgewickelt einen Aus¬ schnitt aus der Umfangsfläche der Flanschenverbindung nach Fig . 6 .7 schematically, in section and developed a section from the peripheral surface of the flange connection according to Fig. 6.
Fig. 1 dient zur Erläuterung des prinzipiellen Aufbaus und der Anordnung eines Radlagersensors bzw. einer Meßvorrichtung nach der Erfindung in der Drehachse eines Fahrzeugrades. Das Radlager 1 setzt sich im wesentlichen aus einem Radlager-Au¬ ßenring 2, einem Radlager-Innenring 3 und Lagerkugeln 4 zu¬ sammen. Ein Teil einer Radwelle 5, die in dem Radlager-In¬ nenring 3 sitzt, ist ebenfalls dargestellt. Die Drehachse A des Radlagers 1 ist durch eine strichpunktierte Linie sym¬ bolisch dargestellt.Fig. 1 serves to explain the basic structure and arrangement of a wheel bearing sensor or a measuring device according to the invention in the axis of rotation of a vehicle wheel. The wheel bearing 1 essentially consists of a wheel bearing outer ring 2, a wheel bearing inner ring 3 and bearing balls 4. A part of a wheel shaft 5, which is seated in the wheel bearing inner ring 3, is also shown. The axis of rotation A of the wheel bearing 1 is shown symbolically by a dash-dotted line.
Mit dem stationären, am Fahrzeug befestigten Radlager-Außen¬ ring 2 ist ein Sensoraufnahmegehäuse 6, das vorzugsweise in Form eines rotationssymmetrischen tiefgezogenen Blechteils ausgebildet ist, starr verbunden. Nach einem Ausfüh¬ rungsbeispiel der Erfindung ist es vorgesehen, dieses Blech¬ teil bzw. das Sensoraufnahmegehäuse 6 durch Paßsitz oder Preßsitz am Radlager-Außenring 2 zu befestigen.A sensor receiving housing 6, which is preferably designed in the form of a rotationally symmetrical deep-drawn sheet metal part, is rigidly connected to the stationary wheel bearing outer ring 2, which is fastened to the vehicle. According to an exemplary embodiment of the invention, it is provided that this sheet metal part or the sensor receptacle housing 6 is attached to the wheel bearing outer ring 2 by a snug fit or a press fit.
In dem Sensoraufnahmegehäuse 6 befindet sich ein als Meßwert¬ aufnehmer dienender Sensor 7, der hier in das Sensor-Aufnah- megehäuse eingesteckt ist und von diesem Gehäuse in vorgege¬ bener Axial- und Winkellage positioniert und gehalten wird.In the sensor housing 6 there is a sensor 7 serving as a sensor, which is inserted here in the sensor housing and is positioned and held by this housing in the given axial and angular position.
Der Sensor 7 enthält eine doppelseitige Meßspule 8; solche Meßspulen sind beispielsweise aus der eingangs genannten Schrift DE 42 13 977 AI bekannt. Aus dieser Spule ragen beid- seitig Polschuhe 9 heraus, die bis zu der Innenfläche eines als Meßwertgeber dienenden Signalgeberringes 10 reichen, der mit dem Radlager-Innenring 3 verbunden ist und folglich mit dem Rad oder der Achse 5, dessen bzw. deren Drehbewegung ge¬ messen werden soll, roetiert. Der Signalgeberring 10 ist mit nach innen gerichteten Zähnen oder Erhebungen versehen. Zwi¬ schen diesen Zähnen und den Enden der Polschuhe 9 befindet sich ein schmaler Luftspalt, so daß der Signalgeberring 10 ungehindert um die doppelseitige Meßspule 8 rotieren und in bekannter Weise Magnetfeldänderungen hervorrufen kann, welche schließlich für das Erzeugen eines elektrischen, die Radbewe¬ gung darstellenden Signals am Ausgang des Sensors 7 ursäch¬ lich sind.The sensor 7 contains a double-sided measuring coil 8; Such measuring coils are known for example from the document DE 42 13 977 AI mentioned at the beginning. Pole shoes 9 protrude from this coil on both sides, which reach as far as the inner surface of a signaling ring 10 serving as a measuring value transmitter, which is connected to the wheel bearing inner ring 3 and consequently to the wheel or the axle 5, its or its rotational movement to be measured, rotet. The signal generator ring 10 is with teeth or elevations facing inwards. There is a narrow air gap between these teeth and the ends of the pole pieces 9, so that the signaling ring 10 can rotate freely around the double-sided measuring coil 8 and can produce magnetic field changes in a known manner, which changes ultimately lead to the generation of an electrical movement representing the wheel movement Signals at the output of the sensor 7 are causal.
Erfindungswesentlich ist die Befestigung, Positionierung und Arretierung des Sensors 7 in dem Sensoraufnahmegehäuse 6. Die im vorliegenden Ausführungsbeispiel gewählte Ausgestaltung dieser Verbindung veranschaulicht Fig. 2. Das Sensorauf¬ nahmegehäuse 6 endet an der Aufnahmeseite für den Sensor 7 in einem radial nach außen weisenden, ringförmigen Flansch 11. In entsprechender Weise ist an dem Sensor 7 ein Flansch 12 angeformt. Dieser Flansch 12 des Sensors endet im vorlieenden Beispiel in einzelnen, gleichmäßig über dem Umfang dieses Flansches verteilt angeordneten Schnapphaken 13 - vgl. Fig. 1 und 2 -, die einen parallel zur Drehachse A der Anordnung verlaufenden Abschnitt 14 aufweisen. Die einzelnen Schnap¬ phaken 13 und deren Abschnitte 14 enden in einem hakenförmi¬ gen, nach innen weisenden Wulst 15, der über den Flansch 11 des Sensoraufnahmegehäuses 6 hinweggreift. Mit Hilfe dieses Innenwulstes 15 des Schnapphakens 13 findet der Sensorflansch 12 einen festen Halt an dem Flansch 11 des Sensor-Aufnahme- gehäuses 6.The fastening, positioning and locking of the sensor 7 in the sensor receptacle housing 6 is essential to the invention. The embodiment of this connection selected in the present exemplary embodiment is illustrated in FIG. 2. The sensor receptacle housing 6 ends on the receiving side for the sensor 7 in a radially outwardly pointing, annular Flange 11. In a corresponding manner, a flange 12 is formed on the sensor 7. In the present example, this flange 12 of the sensor ends in individual snap hooks 13 which are evenly distributed over the circumference of this flange - cf. 1 and 2 -, which have a section 14 running parallel to the axis of rotation A of the arrangement. The individual snap hooks 13 and their sections 14 end in a hook-shaped, inward-pointing bead 15 which extends over the flange 11 of the sensor receptacle housing 6. With the aid of this inner bead 15 of the snap hook 13, the sensor flange 12 finds a firm hold on the flange 11 of the sensor receptacle housing 6.
Die vorgegebene Winkellage des Sensors 7 im Sensor-Auf¬ nahmegehäuse 10 wird in dem Ausführungsbeispiel nach Fig. 3 und 4, das mit dem Ausführungsbeispiel nach Fig. 1 und 2 identisch sein kann, auf einfache Weise mit Hilfe eines Posi¬ tionierungskeils 16 vorgegeben, der in eine entsprechende Ausnehmung 17 - vgl. Fig. 4 - in dem radial nach außen wei¬ senden Flansch 11 - siehe Fig. 2 - des Sensoraufnahmegehäuses 6 eingreift. Handelt es sich bei dem Sensor-aufnahmegehäuse 6, wie hier, um ein tiefgezogenes Blechteil, wird diese Aus¬ nehmung 17 in dem ringförmigen Flansch 11 des Auf- nah egehäuseε am einfachsten durch Ausstanzen hergestellt. Eine im Vergleich zu dem bisher Beschriebenen abweichende Ausgestaltung der Flansche zeigen die Figuren 5 bis 7. In diesem Beispiel - siehe Fig. 5 - ist der Flansch des Sensor¬ aufnahmegehäuses an seinen radial nach außen weisenden Flanschteilen an der Aufnahmeseite für den Sensor 7 mit Zäh¬ nen 18 ausgerüstet, die zu der senkrecht zu der Drehachse des Radlagers und damit auch des Sensors 7 verlaufenden Planflä¬ che B dieses Flansches 11' verschränkt sind. Die einzelnen Zähne sind also zu der Planfläche B bzw. zu der von dem ring¬ förmigen Flansch 11' aufgespannten Fläche in einen spitzen Neigungswinkel W angeordnet, wie dies besonders deutlich aus Fig. 7 zu erkennen ist. In Fig. 6 ist die durch die Ab- winklung hervorgerufene Abweichung durch die gestrichelte Linienführung des Zahnquerschnitts 18' angedeutet.The predetermined angular position of the sensor 7 in the sensor receptacle housing 10 is predefined in a simple manner in the exemplary embodiment according to FIGS. 3 and 4, which can be identical to the exemplary embodiment according to FIGS. 1 and 2, using a positioning wedge 16, the one in a corresponding Recess 17 - cf. Fig. 4 - engages in the radially outward-facing flange 11 - see Fig. 2 - of the sensor housing 6. If the sensor receptacle housing 6 is a deep-drawn sheet metal part, as is the case here, this recess 17 in the ring-shaped flange 11 of the receptacle is most easily produced by punching out. FIGS. 5 to 7 show a different configuration of the flanges from what has been described so far. In this example - see FIG. 5 - the flange of the sensor receptacle housing is tough at its radially outward-pointing flange parts on the receptacle side for the sensor 7 ¬ NEN 18, which are perpendicular to the axis of rotation of the wheel bearing and thus also the sensor 7 plane surface B of this flange 11 '. The individual teeth are thus arranged at an acute angle W of inclination to the flat surface B or to the surface spanned by the annular flange 11 ', as can be seen particularly clearly from FIG. 7. The deviation caused by the angling is indicated in FIG. 6 by the dashed lines of the tooth cross section 18 '.
Der an dem Sensor 7 angeformte Flansch 12' endet abweichend von der zuvor beschriebenen Ausführungsart der Erfindung in verteilt über dem Umfang angeordneten Zacken 19, die, siehe Fig. 6, die einzelnen Zähne 18 umgreifen und hintergreifen, wobei, wenn das Sensoraufnahmegehäuse 6' aus federelastischem Material besteht, der Sensorflansch 12' an dem Flansch des Sensoraufnahmegehäuses bzw. an den Zähnen 18' federnd gehal¬ ten wird.Deviating from the previously described embodiment of the invention, the flange 12 'formed on the sensor 7 ends in tines 19 which are distributed around the circumference and which, as shown in FIG. 6, encompass and engage behind the individual teeth 18, when the sensor receptacle housing 6' protrudes there is resilient material, the sensor flange 12 'is resiliently held on the flange of the sensor receptacle housing or on the teeth 18'.
Wie Fig. 5 zeigt, sind die Zähne 18 am Flansch 12' des Sen¬ soraufnahmegehäuses 6' gleichmäßig über den Umfang verteilt angeordnet, so daß gleichmäßig breite Zahnlücken 20 entste- hen, mit Ausnahme einer erweiterten Zahnlücke 21, die hier zur Festlegung der Winkellage des Sensors 7 in der Sensorauf¬ nahme dient. Der Sensorflansch 12' ist nämlich in seinen ra¬ dial nach außen weisenden Abschnitten derart unterteilt, daß beim Einstecken des Sensors 7 in das Aufnahmegehäuse der Sen¬ sorflansch 12' in die Zahnlücken 20,21 eingreift und daß nach einer Drehbewegung - vgl. Fig. 7 - die einzelnen Zacken 19,19' die Zähne 18 hintergreifen. Fig. 7 zeigt das In¬ einandergreifen nach diesem Verdrehen des eingesteckten Sen¬ sors relativ zu dem Flansch des Sensoraufnahmegehäuses bzw. relativ zu den Zähnen 18. Durch eine Verbreiterung eines Ab¬ schnitts oder Zackens 19' des Sensorflansches 12', der in die verbreiterte Zahnlücke 21 paßt, ist bei diesem Aus¬ führungsbeispiel der Erfindung die Winkelposition des Sensors 7 in dem Sensoraufnahmegehäuse 6' vorgegeben.5 shows, the teeth 18 on the flange 12 'of the sensor receiving housing 6' are evenly distributed over the circumference, so that uniformly wide tooth gaps 20 are formed. hen, with the exception of an enlarged tooth gap 21, which is used here to determine the angular position of the sensor 7 in the sensor receptacle. The sensor flange 12 'is namely divided in its radially outward-pointing sections in such a way that when the sensor 7 is inserted into the receiving housing, the sensor flange 12' engages in the tooth gaps 20, 21 and that after a rotary movement - cf. Fig. 7 - the individual teeth 19, 19 'reach behind the teeth 18. 7 shows the intermeshing after this twisting of the inserted sensor relative to the flange of the sensor receptacle housing or relative to the teeth 18. By widening a section or jag 19 'of the sensor flange 12' which widened into the Tooth gap 21 fits, in this exemplary embodiment of the invention the angular position of the sensor 7 in the sensor receiving housing 6 'is predetermined.
In Fig. 7 ist außerdem noch ein Haken 22 dargestellt, der Bestandteil eines der beiden Flansche, d.h. des Flansches am Sensoraufnahmegehäuse oder des Sensorflansches ist. Nach dem Verdrehen des eingesteckten Sensors greift der Haken 22 in eine entsprechende Öffnung des Gegenflansches ein und sichert dadurch den Sensor gegen unbeabsichtigtes Lösen.7 also shows a hook 22 which is part of one of the two flanges, i.e. the flange on the sensor housing or the sensor flange. After the inserted sensor has been rotated, the hook 22 engages in a corresponding opening in the counter flange and thereby secures the sensor against unintentional loosening.
Das Einstecken des Sensors 7 in das Sensoraufnahmegehäuse und damit des Sensorflansches in die Zahnlücke und das anschlie¬ ßende Verdrehen des Sensors 7 hat die Funktion einer Befesti¬ gung durch ein mehrgängiges Gewinde. Der Haken 22 wird zweck¬ mäßigerweise in Form einer Biegefeder ausgebildet, die beim Verdrehen des Sensors in dem Gehäuse nach außen federt und dadurch die Sperre gegen Zurückdrehen des Sensors bildet. Nach dem Zurückdrücken dieser Feder mittels eines Stiftes kann der Sensor aus dem Aufnahmegehäuse wieder herausgedreht werden. Diese Art der Montage ist spielfrei; die Positionie- rung der Winkellage ist einfach und präzise und bedarf keines Werkzeugs.The insertion of the sensor 7 into the sensor receptacle housing and thus the sensor flange into the tooth space and the subsequent rotation of the sensor 7 has the function of an attachment by means of a multi-start thread. The hook 22 is expediently designed in the form of a spiral spring which springs outwards when the sensor is rotated in the housing and thereby forms the lock against the sensor being turned back. After pushing back this spring with a pin, the sensor can be turned out of the housing. This type of assembly is free of play; the position The angular position is simple and precise and does not require any tools.
Der Sensorflansch ist vorzugsweise ein Kunststoff-Spitzgu߬ teil, das in einem Arbeitsvorgang zusammen mit der Sensorum- mantelung hergestellt werden kann. The sensor flange is preferably a plastic injection molded part, which can be produced in one operation together with the sensor sheathing.

Claims

Patentansprüche claims
1. Vorrichtung zur Messung von Drehbewegungen, mit einem die zu messende Drehbewegung ausführenden Signalgeber, mit einem ortsfesten, als Meßwertaufnehmer dienenden Sensor und mit einem den Sensor aufnehmenden, positio¬ nierenden und in dieser Position haltenden Sensorauf¬ nahmegehäuse, in das der Sensor einsteckbar ist, dadurch gekennzeichnet, daß das Sensoraufnahmegehäuse (6,6') in Form eines rotationssymmetrischen Körpers ausgebildet ist, der an der Sensoraufnahmeseite einen radial nach außen weisenden, ring-, haken- oder zackenförmigen Flansch (11,11') aufweist, welcher beim Einsetzen des Sensors (7) in das Sensoraufnahmegehäuse (6,6') mit ei¬ nem an dem Gehäuse angeformten Sensorflansch (12,12') in Eingriff gelangt.1. Device for measuring rotary movements, with a signal transmitter executing the rotary movement to be measured, with a stationary sensor serving as a measured value sensor and with a sensor receiving housing which accommodates, positions and holds in this position, into which the sensor can be inserted , characterized in that the sensor receptacle housing (6, 6 ') is designed in the form of a rotationally symmetrical body which on the sensor receptacle side has a radially outwardly pointing, ring-shaped, hooked or serrated flange (11, 11') which, when inserted of the sensor (7) into the sensor receiving housing (6, 6 ') engages with a sensor flange (12, 12') formed on the housing.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der als Sensoraufnahmegehäuse (6,6') dienende Körper ein tiefgezogenes Blechteil ist.2. Device according to claim 1, characterized in that the body serving as the sensor receiving housing (6, 6 ') is a deep-drawn sheet metal part.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeich¬ net, daß das Sensoraufnahmegehäuse (6,6') in der Dreh¬ achse (A) eines Fahrzeugrades angeordnet und an einem feststehenden Radlagerring (2) , beispielsweise durch Preßsitz oder Paßsitz, befestigt ist.3. Apparatus according to claim 1 or 2, characterized gekennzeich¬ net that the sensor housing (6,6 ') arranged in the axis of rotation (A) of a vehicle wheel and attached to a fixed wheel bearing ring (2), for example by a press fit or a snug fit is.
4. Vorrichtung nach einem der Ansprüche 1 - 3, dadurch ge¬ kennzeichnet, daß der Sensorflansch (12,12') ring- oder scheibenförmig ist und nach außen weisende oder umgebo¬ gene, parallel zur Sensorachse endende Zähne, Zacken (19,19') oder Haken (13) aufweist.4. Device according to one of claims 1-3, characterized ge indicates that the sensor flange (12, 12 ') ring or is disc-shaped and has outwardly facing or bent teeth, teeth (19, 19 ') or hooks (13) which end parallel to the sensor axis.
Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Sensor (7) in einem Spritzgußgehäuse sitzt und daß der Sensorflansch (12) in Form von radial nach außen weisenden Schnapphaken (13) ausgebildet ist, die den Flansch (11) des Sensoraufnahmegehäuses (6) umgreifen und nach dem Einstecken des Sensors (7) in das Sensoraufnahmegehäuse (6) auffedern und eine in Axial¬ richtung wirkende, den Sensor (7) im Gehäuse (6) ar¬ retierende Federkraft hervorrufen.Apparatus according to claim 4, characterized in that the sensor (7) is seated in an injection molded housing and that the sensor flange (12) is designed in the form of snap hooks (13) pointing radially outwards which secure the flange (11) of the sensor receiving housing (6). reach around and after inserting the sensor (7) into the sensor housing (6) spring up and cause an axial force that locks the sensor (7) in the housing (6).
Vorrichtung nach einem oder mehreren der Ansprüche 1 - 5, dadurch gekennzeichnet, daß der Flansch (12,12') des Sensoraufnahmegehäuses (6,6' ) gleichmäßig am Umf ng verteilt angeordnete Zähne (18)besitzt, die radial nach außen gerichtet sind und zu der senkrecht zur Sensor¬ achse liegenden Planfläche (B) des Flansches (11,11') einen Neigungswinkel (W) einschließen, sowie daß der Sensorflansch (12,12') beim Einstecken des Sensors (7) in die Zahnlücken (20,21) des Flansches (11,11') ein¬ greifende, nach Verdrehen des Sensors (7) im Gehäuse (6,6') die Zähne (18) hintergreifende Zacken (18,18') aufweist.Device according to one or more of claims 1-5, characterized in that the flange (12, 12 ') of the sensor receiving housing (6, 6') has teeth (18) which are distributed uniformly around the circumference and are directed radially outwards and Include an angle of inclination (W) to the plane surface (B) of the flange (11, 11 ') perpendicular to the sensor axis, and that the sensor flange (12, 12') when the sensor (7) is inserted into the tooth gaps (20, 21) of the flange (11, 11 ') engaging teeth (18, 18') engaging the teeth (18) after turning the sensor (7) in the housing (6,6 ').
Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Winkellage des Sensors (7) in dem Sensorauf-nah- megehäuses (6,6' ) durch Erweitern einer Zahnlücke (21) und entsprechende Verbreiterung des in diese Zahnlücke einsteckbaren Zackens (19') vorgegeben ist. Apparatus according to claim 6, characterized in that the angular position of the sensor (7) in the sensor receptacle housing (6, 6 ') is predetermined by expanding a tooth gap (21) and widening the tooth (19') which can be inserted into this tooth gap is.
8. Vorrichtung nach Anspruch 6 oder 7, dadurch gekennzeich¬ net, daß zur Halterung des Sensors (7) im Sensorgehäuse (6,6') die (gegen die Planfläche des Flansches geneig¬ ten) Zähne (18) beim Drehen des Sensors (7) durch die diese Zähne (18) hintergreifenden Zacken (19,19') elas¬ tisch verformbar sind.8. Apparatus according to claim 6 or 7, characterized gekennzeich¬ net that for holding the sensor (7) in the sensor housing (6,6 ') (against the flat surface of the flange) th teeth (18) when rotating the sensor ( 7) are elastically deformable by the teeth (19, 19 ') engaging behind these teeth (18).
9. Vorrichtung nach einem der Ansprüche 6 - 8, dadurch ge¬ kennzeichnet, daß durch das Verdrehen des eingesteckten Sensors (7) ein am Sensorflansch (12') oder am Sensor¬ aufnahmegehäuse (6') elastisch angeordneter Haken (22) federnd in das Gegenstück eingreift und dadurch ein Rückdrehen des Sensors (7) blockiert.9. Device according to one of claims 6-8, characterized ge indicates that by rotating the inserted sensor (7) on the sensor flange (12 ') or on the sensor housing (6') elastically arranged hook (22) resilient in the counterpart engages and thereby blocks the sensor (7) from turning back.
10. Vorrichtung nach einem oder mehreren der Ansprüche 1 - 9, dadurch gekennzeichnet, daß in dem Sensorauf¬ nahmegehäuse (6,6' ) oder an dem Sensor (7) eine Ausneh¬ mung (17) vorgesehen ist, in die ein z.B. keil-, bolzen- oder nockenförmiges, an dem Sensor (7) bzw. an dem Sensoraufnahmegehäuse (6,6') angeformtes Element (16) eingreift und den Sensor (7) in dem Sensorauf¬ nahmegehäuse (6,6') in einer vorgegebenen Winkellage positioniert.10. The device according to one or more of claims 1-9, characterized in that a Ausneh¬ tion (17) is provided in the Sensorauf¬ receiving housing (6,6 ') or on the sensor (7), in which a e.g. Wedge-shaped, bolt-shaped or cam-shaped element (16) which is formed on the sensor (7) or on the sensor receiving housing (6,6 ') and engages the sensor (7) in the sensor receiving housing (6,6') in one predetermined angular position positioned.
11. Vorrichtung nach einem oder mehreren der Ansprüche11. The device according to one or more of the claims
1 - 10, dadurch gekennzeichnet, daß der Sensor (7) eine doppelseitige Meßspule (8) besitzt, die beidseitig aus der Meßspule (8) herausragende Polschuhe (9) aufweist und die senkrecht zu der Drehachse (A) in einem topf- oder hohlzylinderförmigen Signalgeber (10) angeordnet ist, der nach innen gerichtete Zähne oder wellenförmige Erhebungen besitzt. 1 - 10, characterized in that the sensor (7) has a double-sided measuring coil (8) which has pole shoes (9) protruding from the measuring coil (8) on both sides and which is perpendicular to the axis of rotation (A) in a cup-shaped or hollow cylindrical shape Signal generator (10) is arranged, which has inwardly directed teeth or wave-shaped elevations.
EP95942139A 1995-01-18 1995-12-13 Device for measuring rotational movements Ceased EP0804738A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19501268A DE19501268A1 (en) 1995-01-18 1995-01-18 Device for measuring rotary movements
DE19501268 1995-01-18
PCT/EP1995/004922 WO1996022536A2 (en) 1995-01-18 1995-12-13 Device for measuring rotational movements

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Publication Number Publication Date
EP0804738A2 true EP0804738A2 (en) 1997-11-05

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US (1) US6037766A (en)
EP (1) EP0804738A2 (en)
JP (1) JPH11507122A (en)
KR (1) KR19980701446A (en)
DE (1) DE19501268A1 (en)
WO (1) WO1996022536A2 (en)

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Also Published As

Publication number Publication date
DE19501268A1 (en) 1996-07-25
WO1996022536A3 (en) 1996-10-24
US6037766A (en) 2000-03-14
KR19980701446A (en) 1998-05-15
WO1996022536A2 (en) 1996-07-25
JPH11507122A (en) 1999-06-22

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