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DE102006050008A1 - Sensor arrangement for industrial truck, has drive and steering motors arranged coaxial to one another, and sensors detecting speed and rotational direction of motors, where sensors include sensing device axial to drive main axis - Google Patents

Sensor arrangement for industrial truck, has drive and steering motors arranged coaxial to one another, and sensors detecting speed and rotational direction of motors, where sensors include sensing device axial to drive main axis Download PDF

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Publication number
DE102006050008A1
DE102006050008A1 DE200610050008 DE102006050008A DE102006050008A1 DE 102006050008 A1 DE102006050008 A1 DE 102006050008A1 DE 200610050008 DE200610050008 DE 200610050008 DE 102006050008 A DE102006050008 A DE 102006050008A DE 102006050008 A1 DE102006050008 A1 DE 102006050008A1
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DE
Germany
Prior art keywords
drive
sensors
motor
steering
main axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE200610050008
Other languages
German (de)
Inventor
Stephan Scharfenberg
Kai Heinrich
Günther Dipl.-Ing. Scharnagel
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.)
ZF Friedrichshafen AG
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
Priority to DE200610050008 priority Critical patent/DE102006050008A1/en
Publication of DE102006050008A1 publication Critical patent/DE102006050008A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0418—Electric motor acting on road wheel carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B62D15/021—Determination of steering angle
    • B62D15/0235—Determination of steering angle by measuring or deriving directly at the electric power steering motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane
    • G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
    • 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

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The arrangement has drive and steering motors arranged coaxial to one another, and sensors (3,4) detecting speed and rotational direction of the drive and steering motors, where the sensors include a sensing device axial to a drive main axis (1). The sensors are arranged rotatably in a plane perpendicular to a drive main axis and around 180 degrees to each other, where an assembly plane of the sensors are selected in such a manner that sensing of targets (5, 6) of the drive motor and the steering motor are performed by the sensors (3, 4) respectively.

Description

Die vorliegende Erfindung betrifft eine Sensoranordnung zur Erfassung der Drehzahl und Drehrichtung des Fahrmotors und des Lenkmotors eines Flurförderfahrzeuges, bei dem der Fahr- und der Lenkmotor koaxial zueinander angeordnet sind, gemäß dem Oberbegriff des Patentanspruchs 1.The The present invention relates to a sensor arrangement for detection the speed and direction of rotation of the drive motor and the steering motor an industrial truck, in which the driving and the steering motor arranged coaxially with each other are, according to the preamble of claim 1

Flurförderfahrzeuge umfassen in der Regel einen Antriebsmotor, welcher über ein Untersetzungsgetriebe ein Antriebsrad antreibt und einen Lenkmotor, welcher das Antriebsrad um eine Lenkachse verdrehen kann, um eine Lenkbewegung auszuführen. Bei Flurförderfahrzeugen ist der zur Verfügung stehende Bauraum in nachteiliger Weise begrenzt.Flurförderfahrzeuge usually include a drive motor, which via a Reduction gear drives a drive wheel and a steering motor, which can rotate the drive wheel about a steering axis to a To perform steering movement. For industrial trucks is the available standing space limited disadvantageously.

Im Rahmen der DE 10 2004 006 722 A1 bzw. der WO2005/077695 A1 der Anmelderin ist eine zum Fahrmotor koaxiale Lenkgetriebeanordnung beschrieben, die mittels eines von einer Hohlwelle getriebenen mehrstufigen Planetengetriebes oder eines Wolfromgetriebes die Lenkbewegung einleitet. Der bekannte Lenk- und Radantrieb für ein Flurförderzeug umfasst einen Fahrmotor, ein Fahrgetriebe, einen Lenkmotor und ein Lenkgetriebe, durch den wenigstens ein auf einer Radnabe angeordnetes Laufrad antreibbar und um eine Vertikalachse schwenkbar ist. Zur Erzielung einer kompakten Bauform sowie geringer Herstellkosten ist bei diesem Lenk- und Radantrieb vorgesehen, dass der Fahrmotor, der Lenkmotor und das Lenkgetriebe koaxial zueinander angeordnet sind.As part of the DE 10 2004 006 722 A1 or the WO2005 / 077695 A1 the applicant is described a coaxial to the traction motor steering gear assembly which initiates the steering movement by means of a driven by a hollow shaft multi-stage planetary gear or a Wolfromgetriebes. The known steering and wheel drive for a truck includes a traction motor, a driving gear, a steering motor and a steering gear through which at least one arranged on a wheel hub impeller is driven and pivotable about a vertical axis. To achieve a compact design and low production costs is provided in this steering and wheel drive that the traction motor, the steering motor and the steering gear are arranged coaxially with each other.

Bei dem bekannten Antriebssystem sind die Sensoren zur Erfassung der Drehzahl und Drehrichtung des Fahrmotors und des Lenkmotors derart angeordnet, dass deren Sensierungsrichtung radial zur Antriebshauptsache ist.at the known drive system, the sensors for detecting the Speed and direction of rotation of the drive motor and the steering motor such arranged that their Sensierungsrichtung radially to the drive main thing is.

Da das Antriebssystem gemäß der WO2005/077695 A1 hinsichtlich des Bauraumbedarfs bezüglich der Rahmengrundfläche abnimmt, aber in der Bauhöhe zunimmt, ist es für die Detaillierung des Systems zwingend erforderlich, durch konstruktive Maßnahmen die Bauhöhe zu reduzieren.Since the drive system according to the WO2005 / 077695 A1 With regard to the space requirement with respect to the frame base area decreases, but increases in the height, it is imperative for the detailing of the system to reduce the height by constructive measures.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ausgehend von dem genannten Stand der Technik, eine Sensoranordnung zur Erfassung der Drehzahl und Drehrichtung des Fahrmotors und des Lenkmotors eines Flurförderfahrzeuges anzugeben, bei dem Fahr- und der Lenkmotor koaxial zueinander angeordnet sind, welche in einer Minimierung der erforderlichen Bauhöhe resultiert. Insbesondere soll eine Sensoranordnung zur Erfassung der Drehzahl und Drehrichtung des Fahr- und Lenkmotors bei einem Antriebssystem gemäß WO2005/077695 A1 angegeben werden.The present invention has for its object, starting from the cited prior art, to provide a sensor arrangement for detecting the speed and direction of rotation of the drive motor and the steering motor of an industrial vehicle, are arranged coaxially with each other in the driving and steering motor, which in a minimization of required height results. In particular, a sensor arrangement for detecting the rotational speed and direction of rotation of the driving and steering motor in a drive system according to WO2005 / 077695 A1 be specified.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Weitere erfindungsgemäße Ausgestaltungen und Vorteile gehen aus den Unteransprüchen hervor.These The object is solved by the features of claim 1. Further Embodiments of the invention and advantages are apparent from the dependent claims.

Demnach wird vorgeschlagen, im Gegensatz zur aus dem Stand der Technik bekannten Anordnung der Sensoren zur Erfassung der Drehzahl und Drehrichtung des Lenkmotors und des Antriebsmotors mit Sensierungsrichtung radial zur Antriebshauptachse, die Sensoren derart anzuordnen, dass sie eine Sensierungsrichtung axial zur Antriebshauptachse aufweisen.Therefore is proposed, in contrast to the known from the prior art Arrangement of the sensors for detecting the speed and direction of rotation the steering motor and the drive motor with Sensierungsrichtung radially to the drive main axis to arrange the sensors such that they have a Sensierungsrichtung axially to the drive main axis.

Durch die erfindungsgemäße Konzeption wird die Anordnung der Sensoren für Drehzahl und Drehrichtung auf einer Ebene ermöglicht, was wiederum in einer Reduzierung der erforderlichen Bauhöhe resultiert.By the concept of the invention is the arrangement of the sensors for Speed and direction of rotation on one level allows, which in turn in one Reduction of the required height results.

Erfindungsgemäß sind die Sensoren zur Erfassung der Drehzahl und Drehrichtung des Lenkmotors und des Antriebsmotors in einer Ebene senkrecht zur Antriebshauptachse und um 180° zueinander gedreht angeordnet, wobei sie jeweils in die entgegengesetzte Richtung und axial zur Antriebshauptachse sensieren. Dadurch besteht die Möglichkeit, die Sensoren in ein gemeinsames Gehäuse zu integrieren.According to the invention Sensors for detecting the speed and direction of rotation of the steering motor and the drive motor in a plane perpendicular to the drive main axis and 180 ° to each other arranged rotated, each in the opposite direction and sense axially to the drive main axis. This is the Possibility to Sensors in a common housing to integrate.

Gemäß einer vorteilhaften Weiterbildung der Erfindung können die Sensoren in einem Gehäuse angeordnet sein.According to one advantageous development of the invention, the sensors in one Housing arranged be.

Die Erfindung wird im folgenden anhand der beigefügten Figuren beispielhaft näher erläutert.The The invention will be explained in more detail below with reference to the accompanying figures by way of example.

Es zeigen:It demonstrate:

1 eine Schnittansicht eines Teils eines Antriebssystems gemäß der WO2005/077695 A1 , bei dem die Sensoren eine Sensierungsrichtung radial zur Antriebshauptsache aufweisen und 1 a sectional view of a portion of a drive system according to the WO2005 / 077695 A1 in which the sensors have a sensing direction radially to the main drive and

2 eine Schnittansicht eines Teils eines Antriebssystems gemäß der WO2005/077695 A1 , bei dem die Sensoren gemäß der vorliegenden Erfindung eine Sensierungsrichtung axial zur Antriebshauptachse aufweisen. 2 a sectional view of a portion of a drive system according to the WO2005 / 077695 A1 in which the sensors according to the present invention have a Sensierungsrichtung axially to the drive main axis.

In 1 ist ein Teil eines Antriebssystems für ein Flurförderfahrzeug gezeigt, bei dem der Lenkmotor und der Antriebsmotor gemäß der WO2005/077695 A1 koaxial zueinander angeordnet sind. Die Antriebshauptachse ist mit 1 bezeichnet, wobei die Lenkmotorwelle mit dem Bezugszeichen 2 versehen ist.In 1 is shown a part of a drive system for an industrial truck, in which the steering motor and the drive motor according to the WO2005 / 077695 A1 are arranged coaxially with each other. The drive main axis is with 1 designated, wherein the steering motor shaft with the reference numeral 2 is provided.

Des weiteren ist in der Figur ein Sensor 3 zur Erfassung der Drehzahl und Drehrichtung des Fahrmotors dargestellt, welcher eine Sensierungsrichtung aufweist, die radial zur Antriebshauptachse 1 ist (die Sensierungsrichtung ist durch den Pfeil veranschaulicht). Ein weiterer Sensor gleicher Sensierungs richtung zur Erfassung der Drehzahl und Drehrichtung des Lenkmotors ist mit 4 bezeichnet und ist parallel zum Sensor 3 angeordnet, wobei die jeweiligen Geberräder (Targets) deren Drehzahl und Drehrichtung durch die Sensoren 3, 4 erfasst werden soll mit 5 bzw. 6 bezeichnet sind. Wie aus 1 ersichtlich, wird durch die Anordnung der Sensoren 3, 4 parallel zueinander die Bauhöhe in nachteiliger Weise erhöht.Furthermore, in the figure, a sensor 3 for detecting the speed and direction of rotation of the drive shown having a Sensierungsrichtung radially to the drive main axis 1 is (the Sensierungsrichtung is illustrated by the arrow). Another sensor same Sensierungs direction for detecting the speed and direction of rotation of the steering motor is with 4 and is parallel to the sensor 3 arranged, wherein the respective donor wheels (targets) whose speed and direction of rotation by the sensors 3 . 4 should be recorded with 5 respectively. 6 are designated. How out 1 can be seen by the arrangement of the sensors 3 . 4 parallel to each other increases the height disadvantageously.

Des weiteren sind in 1 der Stator 7 und der Rotor 8 des Fahrmotors sowie der Stator 9 und der Rotor 10 des Lenkmotors dargestellt, wobei der Wickelkopf des Stators 7 des Fahrmotors mit 12 und der Wickelkopf des Stators 9 des Lenkmotors mit 13 bezeichnet ist; die Statoren 7, 9 sind in einem Zwischengehäuse 11 aufgenommen.Furthermore, in 1 the stator 7 and the rotor 8th of the drive motor and the stator 9 and the rotor 10 represented the steering motor, wherein the winding head of the stator 7 of the drive motor with 12 and the winding head of the stator 9 the steering motor with 13 is designated; the stators 7 . 9 are in an intermediate housing 11 added.

In 2 wird die erfindungsgemäße Konzeption veranschaulicht. Hierbei sind die Sensoren 3, 4 zur Erfassung der Drehzahl und Drehrichtung des Fahrmotors und des Fahrmotors in einer Ebene senkrecht zur Antriebshauptachse 1 und um 180° zueinander gedreht angeordnet, so dass die Sensoren 3, 4 jeweils in die entgegengesetzte Richtung axial zur Antriebshauptachse sensieren. Gemäß der Erfindung ist die Einbauebene der Sensoren 3, 4 derart gewählt, dass eine Sensierung des Targets 5 des Fahrmotors vom Sensor 3 und des Targets 6 des Lenkmotors vom Sensor 4 möglich ist.In 2 the concept of the invention is illustrated. Here are the sensors 3 . 4 for detecting the rotational speed and direction of rotation of the traction motor and the traction motor in a plane perpendicular to the drive main axis 1 and arranged rotated 180 degrees to each other so that the sensors 3 . 4 each sense in the opposite direction axially to the drive main axis. According to the invention, the installation level of the sensors 3 . 4 chosen such that a sensing of the target 5 of the drive motor from the sensor 3 and the target 6 of the steering motor from the sensor 4 is possible.

Selbstverständlich fällt auch jede konstruktive Ausbildung, insbesondere jede räumliche Anordnung der Sensoren an sich sowie zueinander und soweit technisch sinnvoll, unter den Schutzumfang der vorliegenden Ansprüche, ohne die Funktion der Sensoranordnung, wie sie in den Ansprüchen angegeben ist, zu beeinflussen, auch wenn diese Ausbildungen nicht explizit in den Figuren oder in der Beschreibung dargestellt sind.Of course, too any constructive training, especially any spatial Arrangement of the sensors themselves and each other and as far as technically useful, within the scope of the present claims, without the function of the sensor assembly as specified in the claims is to influence, even if these training is not explicit are shown in the figures or in the description.

11
AntriebshauptachseDrive main axis
22
LenkmotorwelleSteering motor shaft
33
Sensorsensor
44
Sensorsensor
55
Target des Fahrmotorstarget of the drive motor
66
Target des Lenkmotorstarget the steering motor
77
Stator des Fahrmotorsstator of the drive motor
88th
Rotor des Fahrmotorsrotor of the drive motor
99
Stator des Lenkmotorsstator the steering motor
1010
Rotor des Lenkmotorsrotor the steering motor
1111
Zwischengehäuseintermediate housing
1212
Wickelkopf des Stators des Fahrmotorswinding the stator of the drive motor
1313
Wickelkopf des Stators des Lenkmotorswinding the stator of the steering motor

Claims (3)

Sensoranordnung zur Erfassung der Drehzahl und Drehrichtung des Fahrmotors und des Lenkmotors eines Flurförderfahrzeuges, bei dem der Fahr- und der Lenkmotor koaxial zueinander angeordnet sind, dadurch gekennzeichnet, dass die Sensoren (3, 4) zur Erfassung der Drehzahl und Drehrichtung des Antriebsmotors und des Lenkmotors eine Sensierungsrichtung axial zur Antriebshauptachse (1) aufweisen.Sensor arrangement for detecting the rotational speed and direction of rotation of the traction motor and the steering motor of an industrial truck, in which the traction motor and the steering motor are arranged coaxially to each other, characterized in that the sensors ( 3 . 4 ) for detecting the rotational speed and direction of rotation of the drive motor and the steering motor, a Sensierungsrichtung axially to the drive main axis ( 1 ) exhibit. Sensoranordnung zur Erfassung der Drehzahl und Drehrichtung des Fahrmotors und des Lenkmotors eines Flurförderfahrzeuges, bei dem der Fahr- und der Lenkmotor koaxial zueinander angeordnet sind, nach Anspruch 1, dadurch gekennzeichnet, dass die Sensoren (3, 4) in einer Ebene senkrecht zur Antriebshauptachse (1) und um 180° zueinander gedreht angeordnet sind, wobei die Sensoren (3, 4) jeweils in die entgegengesetzte Richtung und axial zur Antriebshauptachse (1) sensieren und wobei die Einbauebene der Sensoren (3, 4) derart gewählt ist, dass eine Sensierung des Targets (5) des Fahrmotors vom Sensor (3) und des Targets (6) des Lenkmotors vom Sensor (4) möglich ist.Sensor arrangement for detecting the rotational speed and direction of rotation of the traction motor and the steering motor of an industrial truck, in which the traction and the steering motor are arranged coaxially to each other, according to claim 1, characterized in that the sensors ( 3 . 4 ) in a plane perpendicular to the drive main axis ( 1 ) and rotated 180 ° to each other, wherein the sensors ( 3 . 4 ) in each case in the opposite direction and axially to the drive main axis ( 1 ) and the installation level of the sensors ( 3 . 4 ) is selected such that a sensing of the target ( 5 ) of the drive motor from the sensor ( 3 ) and the target ( 6 ) of the steering motor from the sensor ( 4 ) is possible. Sensoranordnung zur Erfassung der Drehzahl und Drehrichtung des Fahrmotors und des Lenkmotors eines Flurförderfahrzeuges, bei dem der Fahr- und der Lenkmotor koaxial zueinander angeordnet sind, nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Sensoren (3, 4) in einem Gehäuse angeordnet sind.Sensor arrangement for detecting the rotational speed and direction of rotation of the traction motor and the steering motor of an industrial truck, in which the traction and the steering motor are arranged coaxially to each other, according to claim 1 or 2, characterized in that the sensors ( 3 . 4 ) are arranged in a housing.
DE200610050008 2006-10-24 2006-10-24 Sensor arrangement for industrial truck, has drive and steering motors arranged coaxial to one another, and sensors detecting speed and rotational direction of motors, where sensors include sensing device axial to drive main axis Withdrawn DE102006050008A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200610050008 DE102006050008A1 (en) 2006-10-24 2006-10-24 Sensor arrangement for industrial truck, has drive and steering motors arranged coaxial to one another, and sensors detecting speed and rotational direction of motors, where sensors include sensing device axial to drive main axis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610050008 DE102006050008A1 (en) 2006-10-24 2006-10-24 Sensor arrangement for industrial truck, has drive and steering motors arranged coaxial to one another, and sensors detecting speed and rotational direction of motors, where sensors include sensing device axial to drive main axis

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DE102006050008A1 true DE102006050008A1 (en) 2008-04-30

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DE200610050008 Withdrawn DE102006050008A1 (en) 2006-10-24 2006-10-24 Sensor arrangement for industrial truck, has drive and steering motors arranged coaxial to one another, and sensors detecting speed and rotational direction of motors, where sensors include sensing device axial to drive main axis

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4134659A1 (en) * 1991-10-19 1993-04-22 Walterscheid Gmbh Jean ARRANGEMENT FOR DETECTING THE POWER DIRECTION FOR TORQUE TRANSMISSION
DE19924053A1 (en) * 1999-05-26 2000-09-14 Bosch Gmbh Robert Device for registering rotational speed and phase position at rotating components in IC engine of vehicle has sensor module that includes at least two sensors each assigned to sense angle and reference marks on rotating components
DE10055047A1 (en) * 2000-11-07 2002-05-08 Volkswagen Ag Device for measuring revolution rate has revolution rate sensor arranged between two rotatable elements with two sensor elements facing rotatable element markings in axial direction
DE102004006722A1 (en) * 2004-02-11 2005-09-01 Zf Friedrichshafen Ag Steering and wheel drive for industrial truck has drive motor, steering motor and steering transmission installed co-axially with one another and in series one behind other

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4134659A1 (en) * 1991-10-19 1993-04-22 Walterscheid Gmbh Jean ARRANGEMENT FOR DETECTING THE POWER DIRECTION FOR TORQUE TRANSMISSION
DE19924053A1 (en) * 1999-05-26 2000-09-14 Bosch Gmbh Robert Device for registering rotational speed and phase position at rotating components in IC engine of vehicle has sensor module that includes at least two sensors each assigned to sense angle and reference marks on rotating components
DE10055047A1 (en) * 2000-11-07 2002-05-08 Volkswagen Ag Device for measuring revolution rate has revolution rate sensor arranged between two rotatable elements with two sensor elements facing rotatable element markings in axial direction
DE102004006722A1 (en) * 2004-02-11 2005-09-01 Zf Friedrichshafen Ag Steering and wheel drive for industrial truck has drive motor, steering motor and steering transmission installed co-axially with one another and in series one behind other

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