DE102012106907A1 - Steering system for vehicle, has steering housing and torque sensor unit which has a sensor housing which is connected with steering housing and is designed as separate component - Google Patents

Steering system for vehicle, has steering housing and torque sensor unit which has a sensor housing which is connected with steering housing and is designed as separate component

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Publication number
DE102012106907A1
DE102012106907A1 DE201210106907 DE102012106907A DE102012106907A1 DE 102012106907 A1 DE102012106907 A1 DE 102012106907A1 DE 201210106907 DE201210106907 DE 201210106907 DE 102012106907 A DE102012106907 A DE 102012106907A DE 102012106907 A1 DE102012106907 A1 DE 102012106907A1
Authority
DE
Germany
Prior art keywords
steering
housing
sensor
sensor housing
steering system
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.)
Pending
Application number
DE201210106907
Other languages
German (de)
Inventor
Gerhard Ruf
Bernd Hauser
Daniel Pflieger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch Automotive Steering GmbH
Original Assignee
Robert Bosch Automotive Steering GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Automotive Steering GmbH filed Critical Robert Bosch Automotive Steering GmbH
Priority to DE201210106907 priority Critical patent/DE102012106907A1/en
Publication of DE102012106907A1 publication Critical patent/DE102012106907A1/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D6/00Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/08Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
    • B62D6/10Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00Measuring torque, work, mechanical power, or mechanical efficiency in general
    • G01L3/02Rotary-transmission dynamometers
    • G01L3/04Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electrical or magnetic means for indicating
    • G01L3/101Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electrical or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/104Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electrical or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/22Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
    • G01L5/221Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to steering wheels, e.g. for power assisted steering

Abstract

The steering system (1) has a steering housing (4) and a torque sensor unit which has a sensor housing which is connected with the steering housing and is designed as separate component, particularly a plastic component. The sensor housing has a recess for receiving a steering shaft (3). A senor element is received in the sensor housing. A pulse generator is enclosed by the sensor housing and is connected with a steering shaft section.

Description

  • The invention relates to a steering system with a steering housing and a torque sensor unit.
  • From the DE 10 2007 032 907 A1 a steering system for a vehicle with a steering shaft is known, on which a torque sensor device is arranged for determining the steering torque predetermined by the driver via the steering wheel. The torque sensor device has a cylindrical sensor housing which is pushed onto a toothed section of the steering shaft for a rotationally secure attachment. The sensor housing houses a sensor element that interacts with a shaft side pulser.
  • The invention is based on the object with simple, weight-saving measures to arrange a torque sensor unit on a steering shaft of a steering system.
  • This object is achieved with the features of claim 1. The dependent claims indicate expedient developments.
  • The steering system for a vehicle has a steering housing and a torque sensor unit, via which the steering torque, which is effective in the steering shaft, can be determined. The steering housing receives the portion of the steering shaft, which is opposite to the steering wheel, and kinematically couples the steering shaft with a steering linkage via which the steering angle is converted into a wheel steering angle of the steerable wheels. The torque sensor unit comprises a sensor housing, in which a sensor element is accommodated and which is connected to the steering housing. The steering system may optionally be equipped with a steering assist device, for example an electric servo motor for generating a supporting servo torque. The amount of the servo torque is determined, inter alia, according to the predetermined by the driver and determined in the torque sensor device steering torque.
  • The sensor housing, in which the sensor element is accommodated, constitutes a component which is designed separately from the steering housing and which is connected to the steering housing. In addition, no further fastening measures for mounting the torque sensor unit on the steering housing are required. The sensor housing is connected directly to the steering housing, an additional housing for receiving the torque sensor unit is omitted, so that the weight and the assembly cost is reduced.
  • Since the sensor housing shields the sensor element as well as the pulse generator to the environment, the sensor housing is suitably stably formed and ensures a hermetic shielding of sensor element and pulse generator, so that these components are protected from moisture and contamination. The sensor housing consists for example of a stable plastic. Optionally, however, also come versions made of metal, in particular light metal such as aluminum into consideration.
  • In the sensor housing, a cable duct can be integrated, via which the electrical connection of the sensor element takes place. A cable plug can be inserted into the cable duct to make electrical contact with electrical cables leading to the sensor element. Via the electrical cables and the electrical plug, the sensory recorded measured values reach a regulating or control unit located outside the sensor housing.
  • The cable duct expediently extends radially outward on the sensor housing. If appropriate, the cable duct can also be of angular design, so that the outwardly directed opening of the cable duct points in the axial direction. The cable duct is in particular the only connection between the interior of the sensor housing and the environment.
  • The measured values of the sensor element can, for example, be routed to the cable duct via a wound flexible or flat strip in which electrical cables are integrated, where the connection of the electrical cable plug to the conductors of the flat strip takes place.
  • The sensor housing is expediently cup-shaped and can be closed by a lid. The sensor housing is provided with a central recess for receiving the steering shaft, so that the sensor housing can be plugged onto the steering shaft. Also, the lid may be provided with a corresponding recess. The recesses in the sensor housing and in the lid are advantageously arranged centrally and are coaxial with the sensor housing or the housing cover; When assembled, the sensor housing and cover are arranged coaxially to the steering shaft.
  • The connection between the sensor housing and the steering housing can be carried out in various ways. It is advantageous to weld the sensor housing to the steering housing, for example by means of ultrasonic or laser welding. But also comes into consideration a mechanical connection, for example, a screwing, gluing or clipping.
  • The sensor cover is advantageously mechanically connected to the sensor housing, for example by clipping. For a watertight seal, an O-ring is expediently inserted between the sensor housing and the cover. Optionally, however, is also a welded joint between the sensor housing and lid into consideration, for example, an ultrasonic or laser welding.
  • According to a further expedient embodiment, a sleeve is inserted into the recess of the sensor housing, which surrounds the steering shaft and shields the sensor housing radially inwardly toward the steering shaft. The sleeve may have a radially outwardly bent collar which is the carrier of the sensor element. The sleeve is firmly connected to the sensor housing and consists for example of a metallic sleeve portion, on which a plastic sleeve is sprayed. The sleeve is preferably a component formed separately from the sensor housing, which is suitably connected to the sensor housing. In principle, however, is also a one-piece design of sleeve and sensor housing into consideration.
  • The sensor element is, according to a preferred embodiment, a magnetic sensor, for example a magnetoresistive sensor or a Hall sensor. The pulse generator is accordingly a magnet which is rotatably connected to a steering shaft section. The magnet is either annular and placed around the steering shaft section or segment-shaped and surrounds the steering shaft in concentric distance over a defined, limited angle segment.
  • Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:
  • 1 a schematic representation of a steering system in a vehicle,
  • 2 a section along a steering housing, with a connected to the steering housing sensor housing for receiving a torque sensor element,
  • 3 the sensor housing in perspective detail view.
  • In the figures, the same components are provided with the same reference numerals. In 1 is a steering system 1 represented for a vehicle, with a steering wheel 2 , a steering shaft 3 , a steering box 4 and a steering linkage 5 for steering the front wheels 6 , The steering system 1 is with a servo device 7 which is, for example, an electric servomotor (EPS - Electric Power Steering). The servo device 7 generates a servo torque assisting the driver's steering movement. The driver gives over the steering wheel 2 a steering wheel angle δ L ago, via a steering gear in the steering box 4 and the steering linkage 5 in a wheel steering angle δ V at the steerable front wheels 6 is implemented.
  • As 2 refer to the steering housing 4 the steering shaft 3 a, which is made in two parts and an upper steering shaft section 3a includes, which is connected to the steering wheel, and a lower steering shaft portion 3b , which represents the pinion-side steering shaft section, with which the steering shaft in the steering housing 4 protrudes and with the steering linkage 5 combs. The two steering shaft sections 3a and 3b are with each other via a torsion bar 7 connected in the direction of rotation.
  • With the steering housing 4 is a torque sensor unit 8th connected to a sensor housing 9 and a torque sensor received in the sensor housing 10 and as a pulse generator a magnet 12 includes. The torque sensor 10 For example, it is designed as a magnetoresistive sensor for registering a change in the magnetic field coming from the magnet 12 emanates. Also considered is an embodiment of the torque sensor 10 as a Hall sensor.
  • The torque sensor 10 is electric with a ribbon 11 connected, which contains a plurality of electrical conductors and spirally in the sensor housing 9 is wound up. The flat band 11 opens on the torque sensor 10 turned away side in a cable duct 14 , which is integral with the sensor housing 9 is formed and extends radially outward. In the cable duct 14 a cable plug may be inserted to make contact with the electrical conductors of the ribbon 11 so that the torque from the sensor 10 recorded sensor data over the ribbon 11 and the cable connector can be routed to a control unit.
  • The sensor housing 9 is cup-shaped and has a central recess in the bottom, with the sensor housing on the steering shaft 3 is plugged. The flat band 11 is about the central recess or the interference of the steering shaft 3 wound.
  • In the central recess in the bottom of the sensor housing 9 is a sleeve 13 Inserted firmly with the sensor housing 9 connected is. The sleeve 13 advantageously consists of a metallic sleeve part and a molded plastic sleeve, which the interior of the sensor housing 9 is facing. The sleeve 13 has one radially bent collar on which the torque sensor 10 is arranged.
  • In 3 is the sensor housing 9 with the central recess 17 represented in the bottom of the cup-shaped housing.
  • The sensor housing 9 is on a lid 15 to close, on the open front side of the sensor housing 9 can be placed and as well as the sensor housing is provided with a central recess to the steering shaft 3 to be able to record. The the sensor housing 9 opposite end face of the lid 15 is from a protective cap 16 overlapped.
  • Both the torque sensor 10 as well as the pulse generator 12 are located axially inside the sensor housing 9 , The pulse generator 12 , which is designed in the embodiment as a magnet, is either annular and formed around the steering shaft 3 laid or segment-shaped and extends concentrically to the steering shaft 3 over a limited angle segment. The pulse generator 12 is non-rotatable with the outer steering shaft section 3a coupled, whereas the torque sensor 10 firmly with the sensor housing 9 connected is.
  • The sensor housing 9 is in the area of its bottom with the steering housing 4 connected. The steering housing 9 is preferably made of plastic and can by welding, for example via ultrasonic or laser welding to the steering housing 4 get connected.
  • The connection between the lid 15 and the sensor housing 9 is preferably carried out by mechanical means, for example by clipping, where appropriate, a welding of the lid comes with the sensor housing into consideration. The lid 15 is advantageously as well as the sensor housing 9 made of plastic.
  • LIST OF REFERENCE NUMBERS
  • 1
    steering system
    2
    steering wheel
    3
    steering shaft
    4
    steering housing
    5
    steering linkage
    6
    front
    7
    torsion bar
    8th
    Torque sensor unit
    9
    sensor housing
    10
    torque sensor
    11
    ribbon
    12
    magnet
    13
    shell
    14
    cable shaft
    15
    cover
    16
    protective cap
    17
    central recess
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 102007032907 A1 [0002]

Claims (10)

  1. Steering system with a steering housing ( 4 ) and with a torque sensor unit ( 8th ), which is a sensor housing ( 9 ), which with the steering housing ( 4 ), but is designed as a separate component, wherein the sensor housing ( 9 ) a recess for receiving a steering shaft ( 3 ), with a in the sensor housing ( 9 ) and a sensor housing ( 9 ) Enclosed pulser, which is connected to a steering shaft section.
  2. Steering system according to claim 1, characterized in that the sensor housing ( 9 ) an integrated cable duct ( 14 ) having.
  3. Steering system according to claim 2, characterized in that the cable duct ( 14 ) on the sensor housing ( 9 ) extends radially outward.
  4. Steering system according to one of claims 1 to 3, characterized in that the sensor housing ( 9 ) from a lid ( 15 ) is closable, in which a recess for the steering shaft ( 3 ) is introduced.
  5. Steering system according to claim 4, characterized in that the cover ( 15 ) to the sensor housing ( 9 ) is clipped.
  6. Steering system according to one of claims 1 to 5, characterized in that the sensor housing ( 9 ) to the steering housing ( 4 ) is welded, in particular by ultrasonic welding.
  7. Steering system according to one of claims 1 to 6, characterized in that in the recess of the sensor housing ( 9 ) one the steering shaft ( 3 ), with the sensor housing ( 9 ) connected sleeve ( 13 ) is used.
  8. Steering system according to claim 7, characterized in that the sleeve ( 13 ) has a radially outwardly bent collar which is the carrier of the sensor element.
  9. Steering system according to one of claims 1 to 8, characterized in that the sensor element is a magnetic sensor and the pulse generator is a magnet ( 12 ).
  10. Steering system according to one of claims 1 to 9, characterized in that the sensor housing ( 9 ) is designed as a plastic component.
DE201210106907 2012-07-30 2012-07-30 Steering system for vehicle, has steering housing and torque sensor unit which has a sensor housing which is connected with steering housing and is designed as separate component Pending DE102012106907A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201210106907 DE102012106907A1 (en) 2012-07-30 2012-07-30 Steering system for vehicle, has steering housing and torque sensor unit which has a sensor housing which is connected with steering housing and is designed as separate component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210106907 DE102012106907A1 (en) 2012-07-30 2012-07-30 Steering system for vehicle, has steering housing and torque sensor unit which has a sensor housing which is connected with steering housing and is designed as separate component

Publications (1)

Publication Number Publication Date
DE102012106907A1 true DE102012106907A1 (en) 2014-01-30

Family

ID=49912133

Family Applications (1)

Application Number Title Priority Date Filing Date
DE201210106907 Pending DE102012106907A1 (en) 2012-07-30 2012-07-30 Steering system for vehicle, has steering housing and torque sensor unit which has a sensor housing which is connected with steering housing and is designed as separate component

Country Status (1)

Country Link
DE (1) DE102012106907A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006049538A1 (en) * 2006-10-20 2008-04-24 Volkswagen Ag Housing structure for retaining of steering torque sensor, has small deformation resistance in longitudinal direction of motor vehicle, than in each direction in plane, which is orthogonal to preferred direction
DE102007032907A1 (en) 2006-11-02 2008-05-08 Volkswagen Ag Steering shaft with torque measuring unit and mounting method
DE102008009772A1 (en) * 2008-02-19 2009-08-20 Trw Automotive Gmbh Steering gear with sensor
DE102010020599A1 (en) * 2010-05-14 2011-11-17 Trw Automotive Gmbh Sensor assembly for motor vehicle steering systems
WO2011143544A2 (en) * 2010-05-14 2011-11-17 Trw Automotive U.S. Llc Torque sensor assembly and method for producing same
DE102011016627A1 (en) * 2011-04-09 2012-10-11 Volkswagen Aktiengesellschaft Measuring apparatus for measuring rotational angle between steering shaft connected portions to determine rotational torque of motor car steering system, has engaging device coupled with structure that is provided at housing or sensor unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006049538A1 (en) * 2006-10-20 2008-04-24 Volkswagen Ag Housing structure for retaining of steering torque sensor, has small deformation resistance in longitudinal direction of motor vehicle, than in each direction in plane, which is orthogonal to preferred direction
DE102007032907A1 (en) 2006-11-02 2008-05-08 Volkswagen Ag Steering shaft with torque measuring unit and mounting method
DE102008009772A1 (en) * 2008-02-19 2009-08-20 Trw Automotive Gmbh Steering gear with sensor
DE102010020599A1 (en) * 2010-05-14 2011-11-17 Trw Automotive Gmbh Sensor assembly for motor vehicle steering systems
WO2011143544A2 (en) * 2010-05-14 2011-11-17 Trw Automotive U.S. Llc Torque sensor assembly and method for producing same
DE102011016627A1 (en) * 2011-04-09 2012-10-11 Volkswagen Aktiengesellschaft Measuring apparatus for measuring rotational angle between steering shaft connected portions to determine rotational torque of motor car steering system, has engaging device coupled with structure that is provided at housing or sensor unit

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Legal Events

Date Code Title Description
R079 Amendment of ipc main class

Free format text: PREVIOUS MAIN CLASS: B62D0005040000

Ipc: B62D0006100000

R163 Identified publications notified
R081 Change of applicant/patentee

Owner name: ROBERT BOSCH AUTOMOTIVE STEERING GMBH, DE

Free format text: FORMER OWNER: ZF LENKSYSTEME GMBH, 73527 SCHWAEBISCH GMUEND, DE

Effective date: 20150423

R012 Request for examination validly filed