WO1999001730A1 - Detector - Google Patents

Detector Download PDF

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Publication number
WO1999001730A1
WO1999001730A1 PCT/EP1998/003891 EP9803891W WO9901730A1 WO 1999001730 A1 WO1999001730 A1 WO 1999001730A1 EP 9803891 W EP9803891 W EP 9803891W WO 9901730 A1 WO9901730 A1 WO 9901730A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
sensor
detection unit
pulse generator
component
Prior art date
Application number
PCT/EP1998/003891
Other languages
German (de)
French (fr)
Inventor
Martin Budaker
Gerhard HÄGELE
Willi Nagel
Original Assignee
Zf Friedrichshafen Ag
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 Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO1999001730A1 publication Critical patent/WO1999001730A1/en

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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
    • G01P1/026—Housings for speed measuring devices, e.g. pulse generator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets
    • 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
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets

Definitions

  • the invention relates to a detection unit for contact-free detection of the direction and the strength of a torque acting on a component and / or for detection of the direction and / or the speed and / or change in movement of a movement of the component, according to the preamble of claim 1
  • Detection unit comprises at least one pulse generator that is operatively connected to the component and at least one sensor.
  • the pulse generator is arranged in a housing and the sensor is connected to an electronics unit arranged outside the housing. There is a distance between the pulse generator and the sensor.
  • Such a detection unit is known for example from DE 38 35 955 AI.
  • a contact-free torque sensor is arranged in the region of a steering spindle, by means of which the torque can be detected in an auxiliary power steering system.
  • the torque sensor contains two magnetic cylinders or magnetic rings arranged in the interior of a steering housing and a magnetoresistive unit or a sensor assembly with magnetoresistive sensors which protrude from the outside into the interior through an opening in the steering housing. There is an air gap between the two magnetic cylinders on the one hand and the magnetoresistive unit on the other.
  • a disadvantage of this embodiment is the opening in the housing through which the magnetoresistive unit projects into the interior.
  • this opening must be specially made as an opening in the housing and causes costs.
  • this breakthrough must be reliably sealed so that no contaminants can get into the housing.
  • the invention has for its object to avoid the disadvantages of the prior art and to make the design of the housing and the required sealing measures cheaper.
  • the detection unit characterized in claim 1 The housing in its area between the pulse generator and the sensor is designed to be closed. Contrary to the previous view of the specialist world, it has been found that in the case of a contactless steering torque sensor or another detection unit, the distance between the pulse generator and the sensor can also be filled with other materials in addition to air. It is therefore possible to dispense with an opening in the housing.
  • the housing is made of a non-ferromagnetic material at least in the area between the pulse generator and the sensor.
  • the sensor can expediently be arranged in a sensor housing which is screwed to the housing or fastened to the housing with a fastening clamp. It is structurally particularly simple and therefore cost-effective if the sensor is arranged together with the electronics unit on a circuit board in the sensor housing.
  • FIG. 1 shows a longitudinal section through an auxiliary power steering system with a rack and pinion gear.
  • Fig. 3 is a partial section of the detection unit
  • FIG. 4 partial sections analogous to Figs. 2 and 3, and 5 but in a second embodiment.
  • the invention is explained using the example of a detection unit for power steering with a rack and pinion gear.
  • the invention can also be applied to other power steering systems, for example those with ball nut transmissions or with a steering column divided by the steering gear.
  • a pinion 2 is rotatably mounted in a housing 1 in the form of a steering housing.
  • the pinion 2 is connected to an input shaft 4 via a torsion bar 3, and the pinion 2 is also in a driving connection with an electric motor 6 via a gear transmission 5 is also on a rack 7 with not shown, to be steered wheels in driving connection.
  • the input shaft 4 is generally referred to as component 4A, since the input shaft 4 of an auxiliary power steering is only one of many possible exemplary embodiments.
  • a sensor housing 8 is fastened to part of the housing 1, in the exemplary embodiment according to FIG. 1 in the upper part adjacent to the input shaft 4.
  • a sensor 10 is fastened together with an electronics unit 11 on a printed circuit board 12.
  • a pulse generator 13 arranged in the interior of the housing 1 in the form of a magnet ring interacts with the sensor 10. It is essential that there is a certain distance 14 between the sensor 10 and the pulse generator 13. According to the invention, this distance 14 is not filled with air, but with any other material that is not ferromagnetic.
  • the housing 1 therefore consists at least in this area of a non-ferromagnetic material, for example of aluminum, magnesium or a plastic.
  • the sensor 10 and the pulse generator 13 together with the electronics unit 11 form a detection unit for contactless detection of the direction and the size of a steering angle occurring on the input shaft 4.
  • the change in a magnetic field that is caused by a movement of the pulse generator 13 is measured here.
  • the detection unit can be arranged at another location of the power steering.
  • the sensor housing 8 is fastened to the housing 1 by means of fastening screws 15.
  • the sensor housing 8 is attached to the by a fastening clip 16
  • the sensor housing 8 consists of one part together with the fastening clamp 16, as can be seen from FIG. 5. 4 and 5 is particularly advantageous in that the threaded holes for the fastening screws 15 in the housing 1 can be omitted. On the other hand, the sensor housing 8 can be clamped at any point on the circumference of the housing 1 by screws 17.
  • the invention makes it possible to dispense with openings in the housing 1 in the region of the detection unit.
  • the detection unit can also be arranged at locations of the housing 1 that are difficult to access.
  • This makes it possible, depending on the application, to record mechanical quantities in the steering train, such as distance, angle, speed, direction of rotation, acceleration, number of revolutions for rotating and / or translating parts. If, for example, a translatory movement of the rack 7 is to be detected, a bar magnet (not shown) in the area of the rack 7 can be used for the pulse generator 13 instead of a magnetic ring.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The invention relates to a detector used for contactless detection of the direction and size of the angle of rotation of a component (4A) and/or for detection of the direction and/or speed and/or change in the movement of a component (4A). The detector comprises at least one pulse transmitter (13) interacting with said component (4A) and at least one sensor (10). The pulse transmitter (13) is arranged in a housing (1), while the sensor (10) is arranged outside said housing (1). The pulse transmitter (13) and the sensor (10) are set apart from each other. The housing (1) is closed in the area lying between the pulse transmitter (13) and the sensor (10).

Description

Erfassungseinheit Registration unit
Die Erfindung betrifft eine Erfassungseinheit zum kon- taktfreien Erfassen der Richtung und der Stärke eines auf ein Bauteil wirkenden Drehmomentes und/oder zum Erfassen der Richtung und/oder der Geschwindigkeit und/oder Bewegungsänderung einer Bewegung des Bauteiles, nach dem Oberbegriff des Anspruches 1. Die Erfassungseinheit umfaßt we- nigstens einen mit dem Bauteil in Wirkverbindung stehenden Impulsgeber und wenigstens einen Sensor. Dabei ist der Impulsgeber in einem Gehäuse angeordnet und der Sensor mit einer außerhalb des Gehäuses angeordneten Elektronik-Einheit verbunden. Zwischen dem Impulsgeber und dem Sensor beteht ein Abstand.The invention relates to a detection unit for contact-free detection of the direction and the strength of a torque acting on a component and / or for detection of the direction and / or the speed and / or change in movement of a movement of the component, according to the preamble of claim 1 Detection unit comprises at least one pulse generator that is operatively connected to the component and at least one sensor. The pulse generator is arranged in a housing and the sensor is connected to an electronics unit arranged outside the housing. There is a distance between the pulse generator and the sensor.
Eine derartige Erfassungseinheit ist beispielsweise bekannt aus der DE 38 35 955 AI. Bei dieser Erfassungseinheit ist ein kontaktfreier Drehkraftsensor im Bereich einer Lenkspindel angeordnet, durch den die Drehkraft in einer Hilfskraftlenkung erfaßt werden kann. Der Drehkraftsensor enthält zwei im Inneren eines Lenkgehäuses angeordnete Magnetzylinder bzw. Magnetringe und eine Magnetowiderstandseinheit bzw. eine Sensorbaugruppe mit magnetoresistiven Sensoren, die von außen durch eine Öffnung des Lenkgehäuses ins Innere hineinragt. Zwischen den beiden Magnetzylindern einerseits und der Magnetowiderstandseinheit andererseits besteht ein Luftspalt.Such a detection unit is known for example from DE 38 35 955 AI. In this detection unit, a contact-free torque sensor is arranged in the region of a steering spindle, by means of which the torque can be detected in an auxiliary power steering system. The torque sensor contains two magnetic cylinders or magnetic rings arranged in the interior of a steering housing and a magnetoresistive unit or a sensor assembly with magnetoresistive sensors which protrude from the outside into the interior through an opening in the steering housing. There is an air gap between the two magnetic cylinders on the one hand and the magnetoresistive unit on the other.
Nachteilig bei dieser Ausführung ist die Öffnung in dem Gehäuse, durch die die Magnetowiderstandseinheit ins Innere hineinragt. Einerseits muß diese Öffnung als Durchbruch in dem Gehäuse besonders hergestellt werden und ver- ursacht damit Kosten. Andererseits muß dieser Durchbruch zuverlässig abgedichtet werden, damit keine Verunreinigungen in das Gehäuse gelangen können.A disadvantage of this embodiment is the opening in the housing through which the magnetoresistive unit projects into the interior. On the one hand, this opening must be specially made as an opening in the housing and causes costs. On the other hand, this breakthrough must be reliably sealed so that no contaminants can get into the housing.
Der Erfindung liegt die Aufgabe zugrunde, die Nachteile nach dem Stand der Technik zu vermeiden und die Ausgestaltung des Gehäuses und die erforderlichen Abdichtmaßnahmen kostengünstiger zu gestalten.The invention has for its object to avoid the disadvantages of the prior art and to make the design of the housing and the required sealing measures cheaper.
Diese Aufgabe wird durch die im Anspruch 1 gekennzeichnete Erfassungseinheit gelöst. Dabei wird das Gehäuse in seinem zwischen dem Impulsgeber und dem Sensor liegenden Bereich geschlossen ausgeführt. Entgegen der bisherigen Auffassung der Fachwelt hat sich herausgestellt, daß bei einem berührungslosen Lenkdrehkraftsensor oder einer anderen Erfassungseinheit der Abstand zwischen dem Impulsgeber und dem Sensor außer mit Luft auch mit anderen Materialien ausgefüllt sein kann. Es ist deshalb möglich, auf einen Durchbruch in dem Gehäuse zu verzichten.This object is achieved by the detection unit characterized in claim 1. The housing in its area between the pulse generator and the sensor is designed to be closed. Contrary to the previous view of the specialist world, it has been found that in the case of a contactless steering torque sensor or another detection unit, the distance between the pulse generator and the sensor can also be filled with other materials in addition to air. It is therefore possible to dispense with an opening in the housing.
Zweckmäßige und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben. So ist es beispielsweise vorteilhaft, wenn das Gehäuse wenigstens in seinem zwischen dem Impulsgeber und dem Sensor liegenden Bereich aus einem nicht-ferromagnetischen Werkstoff besteht. Konstruktiv läßt sich der Sensor zweckmäßigerweise in einem Sensorgehäuse anordnen, das an das Gehäuse angeschraubt oder mit einer Befestigungsschelle an dem Gehäuse befestigt ist. Konstruktiv besonders einfach und damit ko- stengünstig ist es, wenn der Sensor zusammen mit der Elektronik-Einheit auf einer Leiterplatte in dem Sensorgehäuse angeordnet ist. Im folgenden wird die Erfindung anhand zweier in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert. Es zeigen:Expedient and advantageous embodiments of the invention are specified in the subclaims. For example, it is advantageous if the housing is made of a non-ferromagnetic material at least in the area between the pulse generator and the sensor. In terms of construction, the sensor can expediently be arranged in a sensor housing which is screwed to the housing or fastened to the housing with a fastening clamp. It is structurally particularly simple and therefore cost-effective if the sensor is arranged together with the electronics unit on a circuit board in the sensor housing. The invention is explained in more detail below with reference to two exemplary embodiments shown in the drawing. Show it:
Fig. 1 einen Längs-Schnitt durch eine Hilfskraftlenkung mit einem Zahnstangengetriebe;1 shows a longitudinal section through an auxiliary power steering system with a rack and pinion gear.
Fig. 2 einen Längs-Schnitt im Bereich der Erfas- sungseinheit in vergrößertem Maßstab;2 shows a longitudinal section in the area of the detection unit on an enlarged scale;
Fig. 3 einen Teil-Schnitt der Erfassungseinheit undFig. 3 is a partial section of the detection unit and
Fig. 4 Teil-Schnitte analog zu den Fig. 2 und 3, und 5 jedoch in einem zweiten Ausführungsbeispiel.Fig. 4 partial sections analogous to Figs. 2 and 3, and 5 but in a second embodiment.
Die Erfindung wird am Beispiel einer Erfassungseinheit für eine Hilfskraftlenkung mit einem Zahnstangengetriebe erläutert. Mit gleicher Wirkung kann die Erfindung jedoch auch auf andere Hilfskraftlenkungen, beispielsweise solche mit Kugelmuttergetrieben oder mit einer von dem Lenkgetriebe geteilten Lenksäule, angewendet werden. Außerdem ist es möglich, die Erfindung beispielsweise bei hydraulischen Federungen und anderen Aggregaten anzuwenden, bei denen in Abhängigkeit von Bewegungen und/oder Bewegungsänderungen von Bauteilen hydraulische, pneumatische oder elektrische Impulse gesteuert oder geregelt werden sollen.The invention is explained using the example of a detection unit for power steering with a rack and pinion gear. However, with the same effect, the invention can also be applied to other power steering systems, for example those with ball nut transmissions or with a steering column divided by the steering gear. It is also possible to use the invention, for example, in hydraulic suspensions and other units in which hydraulic, pneumatic or electrical pulses are to be controlled or regulated as a function of movements and / or changes in movement of components.
In einem Gehäuse 1 in der Form eines Lenkgehäuses ist ein Ritzel 2 drehbar gelagert. Das Ritzel 2 ist über einen Drehstab 3 mit einer Eingangswelle 4 verbunden, außerdem steht das Ritzel 2 über ein Zahnradgetriebe 5 in trieblicher Verbindung mit einem Elektromotor 6. Das Ritzel 2 steht außerdem über eine Zahnstange 7 mit nicht dargestellten, zu lenkenden Rädern in trieblicher Verbindung. Die Eingangswelle 4 wird allgemein als Bauteil 4A bezeichnet, da die Eingangswelle 4 einer Hilfskraftlenkung nur eines von vielen möglichen Ausführungsbeispielen ist.A pinion 2 is rotatably mounted in a housing 1 in the form of a steering housing. The pinion 2 is connected to an input shaft 4 via a torsion bar 3, and the pinion 2 is also in a driving connection with an electric motor 6 via a gear transmission 5 is also on a rack 7 with not shown, to be steered wheels in driving connection. The input shaft 4 is generally referred to as component 4A, since the input shaft 4 of an auxiliary power steering is only one of many possible exemplary embodiments.
An einem Teil des Gehäuses 1, in dem Ausführungsbei- spiel nach Fig. 1 in dem oberen, der Eingangswelle 4 benachbarten Teil, ist ein Sensorgehäuse 8 befestigt.A sensor housing 8 is fastened to part of the housing 1, in the exemplary embodiment according to FIG. 1 in the upper part adjacent to the input shaft 4.
In dem Sensorgehäuse 8 ist ein Sensor 10 zusammen mit einer Elektronik-Einheit 11 auf einer Leiterplatte 12 befestigt. Mit dem Sensor 10 wirkt ein im Inneren des Gehäuses 1 angeordneter Impulsgeber 13 in der Form eines Magne- tringes zusammen. Wesentlich ist, daß zwischen dem Sensor 10 und dem Impulsgeber 13 ein bestimmter Abstand 14 besteht. Gemäß der Erfindung wird dieser Abstand 14 nicht mit Luft ausgefüllt, sondern mit einem beliebigen anderen Stoff, der nicht ferromagnetisch ist. Das Gehäuse 1 besteht deshalb wenigstens in diesem Bereich aus einem nicht- ferromagnetischen Werkstoff, beispielsweise aus Aluminium, Magnesium oder einem Kunststoff.In the sensor housing 8, a sensor 10 is fastened together with an electronics unit 11 on a printed circuit board 12. A pulse generator 13 arranged in the interior of the housing 1 in the form of a magnet ring interacts with the sensor 10. It is essential that there is a certain distance 14 between the sensor 10 and the pulse generator 13. According to the invention, this distance 14 is not filled with air, but with any other material that is not ferromagnetic. The housing 1 therefore consists at least in this area of a non-ferromagnetic material, for example of aluminum, magnesium or a plastic.
Der Sensor 10 und der Impulsgeber 13 bilden zusammen mit der Elektronik-Einheit 11 eine Erfassungseinheit zum kontaktfreien Erfassen der Richtung und der Größe eines an der Eingangswelle 4 auftretenden Lenkwinkels. Gemessen wird hierbei die Änderung eines Magnetfeldes, das durch eine Bewegung des Impulsgebers 13 hervorgerufen wird.The sensor 10 and the pulse generator 13 together with the electronics unit 11 form a detection unit for contactless detection of the direction and the size of a steering angle occurring on the input shaft 4. The change in a magnetic field that is caused by a movement of the pulse generator 13 is measured here.
In einer anderen möglichen Ausführungsform, bei der der Elektromotor 6 nicht auf das Ritzel 2, sondern auf die Zahnstange 7 oder auf die Eingangswelle 4, bzw. eine mit der Eingangswelle 4 verbundene Lenksäule wirkt, kann die Erfassungseinheit an einer anderen Stelle der Hilfskraftlenkung angeordnet werden.In another possible embodiment, in which the electric motor 6 not on the pinion 2, but on the rack 7 or on the input shaft 4, or one with acts on the input shaft 4 connected steering column, the detection unit can be arranged at another location of the power steering.
Gemäß dem Ausführungsbeispiel nach Fig. 2 und 3 ist das Sensorgehäuse 8 an dem Gehäuse 1 durch Befestigungsschrauben 15 befestigt.According to the exemplary embodiment according to FIGS. 2 and 3, the sensor housing 8 is fastened to the housing 1 by means of fastening screws 15.
In dem Ausführungsbeispiel nach Fig. 4 und 5 ist das Sensorgehäuse 8 durch eine Befestigungsschelle 16 an demIn the embodiment according to FIGS. 4 and 5, the sensor housing 8 is attached to the by a fastening clip 16
Gehäuse 1 befestigt. Dabei ist es zweckmäßig, wenn das Sensorgehäuse 8 zusammen mit der Befestigungsschelle 16 aus einem Teil besteht, wie dies aus Fig. 5 hervorgeht. Besonders vorteilhaft an dem Ausführungsbeispiel nach Fig. 4 und 5 ist die Tatsache, daß hier einerseits die Gewindebohrungen für die Befestigungsschrauben 15 in dem Gehäuse 1 entfallen können. Andererseits kann das Sensorgehäuse 8 an jeder beliebigen Stelle des Umfanges des Gehäuses 1 durch Schrauben 17 festgeklemmt werden.Housing 1 attached. It is expedient if the sensor housing 8 consists of one part together with the fastening clamp 16, as can be seen from FIG. 5. 4 and 5 is particularly advantageous in that the threaded holes for the fastening screws 15 in the housing 1 can be omitted. On the other hand, the sensor housing 8 can be clamped at any point on the circumference of the housing 1 by screws 17.
Durch die Erfindung ist es möglich, auf Durchbrüche in dem Gehäuse 1 im Bereich der Erfassungseinheit zu verzichten. Dadurch kann die Erfassungseinheit auch an schwer zugänglichen Stellen des Gehäuses 1 angeordnet werden. So wird es möglich, je nach Anwendungsfall, mechanische Größen, wie Weg, Winkel, Drehzahl, Drehrichtung, Beschleunigung, Anzahl von Umdrehungen für rotatorisch und/oder translatorisch bewegte Teile, im Lenkungsstrang zu erfassen. Soll beispielsweise eine translatorische Bewegung der Zahnstange 7 erfaßt werden, so kann für den Impulsgeber 13 anstelle eines Magnetrings ein nicht dargestellter Stabmagnet im Bereich der Zahnstange 7 verwendet werden. Bezugs zeichenThe invention makes it possible to dispense with openings in the housing 1 in the region of the detection unit. As a result, the detection unit can also be arranged at locations of the housing 1 that are difficult to access. This makes it possible, depending on the application, to record mechanical quantities in the steering train, such as distance, angle, speed, direction of rotation, acceleration, number of revolutions for rotating and / or translating parts. If, for example, a translatory movement of the rack 7 is to be detected, a bar magnet (not shown) in the area of the rack 7 can be used for the pulse generator 13 instead of a magnetic ring. Reference sign
1 Gehäuse1 housing
2 Ritzel2 sprockets
3 Drehstab3 torsion bar
4 Eingangswelle4 input shaft
4A Bauteil4A component
5 Zahnradgetriebe5 gear transmission
6 Elektromotor6 electric motor
7 Zahnstange7 rack
8 Sensorgehäuse8 sensor housing
9 -9 -
10 Sensor10 sensor
11 Elektronik-Einheit11 electronics unit
12 Leiterplatte12 printed circuit board
13 Impulsgeber13 pulse generator
14 Abstand14 distance
15 Befestigungsschraube15 fastening screw
16 Befestigungsschelle16 mounting clamp
17 Schraube 17 screw

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Erfassungseinheit zum kontaktfreien Erfassen der Richtung und der Stärke eines auf ein Bauteil (4A) wirkenden Drehmomentes und/oder zum Erfassen der Richtung und/oder der Geschwindigkeit und/oder Bewegungsänderung einer Bewegung des Bauteiles (4A) , wobei die Erfassungseinheit wenigstens einen mit dem Bauteil (4A) in Wirkverbindung stehenden Impulsgeber (13) und wenigstens einen Sensor (10) umfaßt, wobei der Impulsgeber (13) in einem Gehäuse (1) angeordnet ist und der Sensor (10) außerhalb des Gehäuses (1) , - wobei zwischen dem Impulsgeber (13) und dem Sensor (10) ein Abstand besteht, dadurch g e k e n n z e i c h n e t , daß das Gehäuse (1) in seinem zwischen dem Impulsgeber (13) und dem Sensor (10) liegenden Bereich geschlossen ist.1. Detection unit for contactless detection of the direction and the strength of a torque acting on a component (4A) and / or for detection of the direction and / or the speed and / or movement change of a movement of the component (4A), the detection unit having at least one the component (4A) which is in operative connection with the pulse generator (13) and at least one sensor (10), the pulse generator (13) being arranged in a housing (1) and the sensor (10) outside the housing (1), - There is a distance between the pulse generator (13) and the sensor (10), characterized in that the housing (1) is closed in its area lying between the pulse generator (13) and the sensor (10).
2. Erfassungseinheit nach Anspruch 1, dadurch g e k e n n z e i c h n e t , daß das Gehäuse (1) wenigstens in dem genannten Bereich aus einem nicht-ferromagnetischen Werkstoff besteht.2. Detection unit according to claim 1, characterized in that the housing (1) consists of a non-ferromagnetic material at least in the area mentioned.
3. Erfassungseinheit nach Anspruch 2, dadurch g e k e n n z e i c h n e t , daß der Sensor (10) in einem Sensorgehäuse (8) angeordnet ist.3. Detection unit according to claim 2, characterized in that the sensor (10) is arranged in a sensor housing (8).
4. Erfassungseinheit nach Anspruch 3, dadurch g e k e n n z e i c h n e t , daß der Sensor (10) zusammen mit der Elektronik-Einheit (11) auf einer Leiterplatte (12; in dem Sensorgehäuse (8) angeordnet ist. 4. Detection unit according to claim 3, characterized in that the sensor (10) is arranged together with the electronics unit (11) on a circuit board (12; in the sensor housing (8).
5. Erfassungseinheit nach Anspruch 3, dadurch g e k e n n z e i c h n e t , daß das Sensorgehäuse (8) an das Gehäuse (1) angeschraubt ist.5. Detection unit according to claim 3, characterized in that the sensor housing (8) is screwed onto the housing (1).
6. Erfassungseinheit nach Anspruch 3, dadurch g e k e n n z e i c h n e t , daß das Sensorgehäuse (8) an dem Gehäuse (1) durch eine Befestigungsschelle (16) befestigt ist.6. Detection unit according to claim 3, characterized in that the sensor housing (8) is fastened to the housing (1) by a fastening clip (16).
7. Erfassungseinheit nach Anspruch 6, dadurch g e - k e n n z e i c h n e t , daß das Sensorgehäuse (8) zusammen mit der Befestigungsschelle (16) aus einem Teil besteht. 7. Detection unit according to claim 6, characterized in that the sensor housing (8) together with the fastening clip (16) consists of one part.
PCT/EP1998/003891 1997-06-30 1998-06-25 Detector WO1999001730A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19727664.4 1997-06-30
DE19727664 1997-06-30

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