DE102014117861B4 - Rear axle steering for motor vehicles - Google Patents
Rear axle steering for motor vehicles Download PDFInfo
- Publication number
- DE102014117861B4 DE102014117861B4 DE102014117861.0A DE102014117861A DE102014117861B4 DE 102014117861 B4 DE102014117861 B4 DE 102014117861B4 DE 102014117861 A DE102014117861 A DE 102014117861A DE 102014117861 B4 DE102014117861 B4 DE 102014117861B4
- Authority
- DE
- Germany
- Prior art keywords
- steering
- pinion
- clutch
- ball ramp
- rear axle
- 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.)
- Active
Links
- 230000000903 blocking effect Effects 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract 2
- 238000010168 coupling process Methods 0.000 claims abstract 2
- 238000005859 coupling reaction Methods 0.000 claims abstract 2
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
- B62D7/14—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
- B62D7/15—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels
- B62D7/1581—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels characterised by comprising an electrical interconnecting system between the steering control means of the different axles
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- 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
- B62D5/0421—Electric motor acting on or near steering gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/12—Steering gears mechanical of rack-and-pinion type
-
- 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
- B62D5/043—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by clutch means between driving element, e.g. motor, and driven element, e.g. steering column or steering gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
- B62D7/14—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
- B62D7/148—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering provided with safety devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
- Mechanical Operated Clutches (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Abstract
Hinterachslenkung für Kraftfahrzeuge, mit einem zentralen Aktuator (1) zur Verschiebung einer Lenkstange (2), die mit beiden Rädern (HL; HR) der Hinterachse verbunden ist und eine Änderung des Lenkwinkels dieser Räder (HL, HR) bewirkt, wobei die Lenkstange (2) mit einem Lenkritzel (3) in Eingriff steht, wobei das Lenkritzel (3) mittels einer Blockiereinrichtung (4) blockierbar ist, wodurch eine Bewegung der Lenkstange (2) unterdrückbar ist und wobei die Blockiereinrichtung (4) als Kupplung (23) ausgebildet ist, dadurch gekennzeichnet, dass die Kupplung (23) mehrere Scheiben (5) aufweist und dass die unterste Scheibe an einer Drückplatte (8) anliegt, die durch eine motorbetriebene Kugelrampe (9) entgegen der Kraft eines Federpakets (12) gespannt ist, sodass bei Ausfall der elektrischen Energieversorgung das Lenkritzel (3) durch die Federspannung des Federpakets (12) blockierbar ist und ein Schließen der Kupplung (23) bewirkt wird.Rear-axle steering for motor vehicles, with a central actuator (1) for moving a steering rod (2), which is connected to both wheels (HL; HR) of the rear axle and causes a change in the steering angle of these wheels (HL, HR), the steering rod ( 2) engages with a steering pinion (3), the steering pinion (3) being able to be blocked by means of a blocking device (4), whereby a movement of the steering rod (2) can be suppressed and the blocking device (4) being designed as a clutch (23). characterized in that the coupling (23) has a plurality of discs (5) and that the bottom disc bears against a pressure plate (8) which is tensioned by a motor-driven ball ramp (9) against the force of a spring assembly (12), so that if the electrical energy supply fails, the steering pinion (3) can be blocked by the spring tension of the spring assembly (12) and the clutch (23) is closed.
Description
Die vorliegende Erfindung betrifft eine Hinterachslenkung für Kraftfahrzeuge, mit einem zentralen Aktuator zur Verschiebung einer Lenkstange, die mit beiden Rädern der Hinterachse verbunden ist und eine Änderung des Lenkwinkels dieser Räder bewirkt, wobei die Lenkstange mit einem Lenkritzel in Eingriff steht und das Lenkritzel zur Unterdrückung einer Bewegung der Lenkstange mittels einer Blockiereinrichtung, die als Kupplung ausgebildet ist, blockierbar ist.The present invention relates to rear axle steering for motor vehicles, with a central actuator for displacing a steering rod which is connected to both wheels of the rear axle and causes a change in the steering angle of these wheels, the steering rod being in engagement with a steering pinion and the steering pinion for suppressing a Movement of the handlebar by means of a blocking device, which is designed as a clutch, can be blocked.
Im Allgemeinen sind Hinterachslenkungen aus dem Stand der Technik bekannt, die entweder für jedes Rad der Hinterachse einen einzelnen Aktuator aufweisen oder einen zentralen Aktuator zur gemeinsamen Betätigung der beiden Hinterräder eines Kraftfahrzeugs. Bei einer Hinterachslenkung mit einem zentralen Aktuator ist es dabei grundsätzlich denkbar, eine Vorderachslenkung so zu modifizieren, dass diese auch für die Lenkung einer Hinterachse einsetzbar ist.In general, rear-axle steering systems are known from the prior art, which have either an individual actuator for each wheel of the rear axle or a central actuator for jointly actuating the two rear wheels of a motor vehicle. In the case of rear-axle steering with a central actuator, it is fundamentally conceivable to modify front-axle steering in such a way that it can also be used to steer a rear axle.
Aus der
Die
Bei einem Ausfall der elektrischen Energieversorgung kann sich die Lenkstange in derartigen Hinterachslenkungen aufgrund der dynamischen oder auch statischen Last bewegen und einen Lenkwinkel für die Hinterräder einstellen. Kleine Lenkwinkel sind dabei für das Fahrverhalten des Kraftfahrzeugs nicht problematisch, aber der Fahrzeugführer muss über die Vorderachslenkung ständig gegenlenken oder stellt einen veränderten Geradeauslauf des Kraftfahrzeugs fest. Für die stromlose Rückfallebene muss die Hinterachslenkung daher blockiert werden.If the electrical power supply fails, the steering rod in such rear-axle steering systems can move due to the dynamic or static load and set a steering angle for the rear wheels. Small steering angles are not problematic for the driving behavior of the motor vehicle, but the driver of the vehicle must constantly countersteer via the front-axle steering or notices that the motor vehicle is traveling in a straight line. The rear axle steering must therefore be blocked for the currentless fallback level.
Es ist daher Aufgabe der vorliegenden Erfindung, eine Hinterachslenkung der eingangs genannten Gattung dahingehend zu verbessern, dass eine Rückfallebene für den Fahrzeugführer sicher beherrschbar ist.It is therefore the object of the present invention to improve rear-axle steering of the type mentioned at the outset in such a way that a fall-back level can be safely controlled by the vehicle driver.
Diese Aufgabe wird mit einer Hinterachslenkung mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Weiterbildungen des Erfindungsgenstandes sind den Unteransprüchen entnehmbar.This problem is solved with a rear-axle steering with the features of
Dabei ist vorgesehen, dass die Kupplung mehrere Scheiben aufweist und dass die unterste Scheibe an eine Drückplatte anliegt, die durch eine motorbetriebene Kugelrampe entgegen eines Federpakets gespannt ist, sodass bei Ausfall der elektrischen Energieversorgung das Lenkritzel durch die Federspannung des Federpakets blockierbar ist und ein Schließen der Kupplung bewirkt wird.It is provided that the clutch has several discs and that the bottom disc rests on a pressure plate, which is tensioned by a motor-driven ball ramp against a spring assembly, so that if the electrical energy supply fails, the steering pinion can be blocked by the spring tension of the spring assembly and closing of the clutch is effected.
Die vorliegende Erfindung wird anhand eines Ausführungsbeispiels im Zusammenhang mit den beiliegenden Figuren nachfolgend näher erläutert. In der Zeichnung zeigen:
-
1 eine schematische Darstellung einer Vorderachslenkung in der Verwendung als Hinterachslenkung; -
2 eine schematische Darstellung der erfindungsgemäßen Hinterachslenkung; -
3a, b eine schematische Darstellung einer Blockiereinrichtung mit einer Kupplung. -
4a, b ein Ausführungsbeispiel einer Blockiereinrichtung als Kupplung.
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1 a schematic representation of a front-axle steering in use as a rear-axle steering; -
2 a schematic representation of the rear axle steering according to the invention; -
3a, b a schematic representation of a blocking device with a clutch. -
4a, b an embodiment of a blocking device as a clutch.
In der
Da der Kugelgewindetrieb 29 nicht selbsthemmend ausgeführt ist, kann die Lenkstange 2 bei einem Ausfall der elektrischen Energieversorgung wandern und einen Lenkwinkel für die Hinterräder HL, HR einstellen, was unerwünscht ist. Für die stromlose Rückfallebene muss die Hinterachslenkung daher blockiert werden. Dazu ist vorgesehen, wie es in
In der
Das Ausführungsbeispiel nach
Der Gedanke der vorliegenden Erfindung ist es, eine elektromechanische Vorderachslenkung so zu verändern, dass diese als Zentralaktuator für eine Hinterachslenkung dienen kann. Der Unterschied einer Vorderachslenkung zu einer Hinterachslenkung besteht im Wesentlichen darin, dass die Hinterachslenkung bei Ausfall der Energieversorgung oder eines sonstigen Defekts blockierbar sein muss, damit die Hinterachslenkung nicht selbstständig unerwünschte Lenkwinkel für die Hinterräder einstellt. Zu diesem Zweck ist vorgesehen, dass das Lenkritzel, an dem bei einer Vorderachslenkung das Lenkrad befestigt wäre, mit einer Blockiereinrichtung versehen wird. Durch diese Maßnahme wird das Lenkritzel blockierbar und eine Bewegung der Lenkstange verhindert. Durch diese Maßnahme ist ein Einsatz einer Vorderachslenkung als Hinterachslenkung durchführbar.The idea of the present invention is to change an electromechanical front-axle steering system in such a way that it can serve as a central actuator for a rear-axle steering system. The main difference between front-axle steering and rear-axle steering is that the rear-axle steering must be able to be blocked in the event of a power failure or some other defect, so that the rear-axle steering does not independently set an undesirable steering angle for the rear wheels. For this purpose, it is provided that the steering pinion, to which the steering wheel would be attached in the case of front-axle steering, is provided with a blocking device. This measure locks the steering pinion and prevents the steering rod from moving. This measure makes it possible to use a front-axle steering system as a rear-axle steering system.
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014117861.0A DE102014117861B4 (en) | 2014-12-04 | 2014-12-04 | Rear axle steering for motor vehicles |
CN201510875901.XA CN105667573B (en) | 2014-12-04 | 2015-12-03 | Rear-axle steering system for motor vehicles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014117861.0A DE102014117861B4 (en) | 2014-12-04 | 2014-12-04 | Rear axle steering for motor vehicles |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102014117861A1 DE102014117861A1 (en) | 2016-06-09 |
DE102014117861B4 true DE102014117861B4 (en) | 2023-08-03 |
Family
ID=55974868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102014117861.0A Active DE102014117861B4 (en) | 2014-12-04 | 2014-12-04 | Rear axle steering for motor vehicles |
Country Status (2)
Country | Link |
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CN (1) | CN105667573B (en) |
DE (1) | DE102014117861B4 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE545191C2 (en) * | 2021-09-20 | 2023-05-09 | Scania Cv Ab | Control device and method for controlling a tag axle steering system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4025950A1 (en) | 1989-09-09 | 1991-03-14 | Volkswagen Ag | Rear wheel steering mechanism for 4-wheel steering system - angles rear wheels in opposition or in same direction as front wheels according to motor vehicle velocity |
DE102008060548A1 (en) | 2007-12-10 | 2009-07-30 | Trw Automotive U.S. Llc, Livonia | Safety device for steerable vehicle rear wheels |
DE102009033912A1 (en) | 2009-07-20 | 2011-01-27 | Magna Powertrain Ag & Co Kg | Steering gear and vehicle steering assembly |
DE102014100719A1 (en) | 2013-12-11 | 2015-06-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Rear axle steering for motor vehicles |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3517833B2 (en) * | 2000-04-05 | 2004-04-12 | 本田技研工業株式会社 | Vehicle having variable steering angle ratio steering device and electric power steering device |
DE10117634A1 (en) * | 2001-04-09 | 2002-12-12 | Mercedes Benz Lenkungen Gmbh | Motorized power steering unit |
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2014
- 2014-12-04 DE DE102014117861.0A patent/DE102014117861B4/en active Active
-
2015
- 2015-12-03 CN CN201510875901.XA patent/CN105667573B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4025950A1 (en) | 1989-09-09 | 1991-03-14 | Volkswagen Ag | Rear wheel steering mechanism for 4-wheel steering system - angles rear wheels in opposition or in same direction as front wheels according to motor vehicle velocity |
DE102008060548A1 (en) | 2007-12-10 | 2009-07-30 | Trw Automotive U.S. Llc, Livonia | Safety device for steerable vehicle rear wheels |
DE102009033912A1 (en) | 2009-07-20 | 2011-01-27 | Magna Powertrain Ag & Co Kg | Steering gear and vehicle steering assembly |
DE102014100719A1 (en) | 2013-12-11 | 2015-06-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Rear axle steering for motor vehicles |
Also Published As
Publication number | Publication date |
---|---|
CN105667573B (en) | 2018-04-10 |
CN105667573A (en) | 2016-06-15 |
DE102014117861A1 (en) | 2016-06-09 |
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Date | Code | Title | Description |
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R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: B62D0003040000 Ipc: B62D0006000000 |
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R163 | Identified publications notified | ||
R012 | Request for examination validly filed | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |