DE102005019287A1 - Electromechanical power steering - Google Patents
Electromechanical power steering Download PDFInfo
- Publication number
- DE102005019287A1 DE102005019287A1 DE102005019287A DE102005019287A DE102005019287A1 DE 102005019287 A1 DE102005019287 A1 DE 102005019287A1 DE 102005019287 A DE102005019287 A DE 102005019287A DE 102005019287 A DE102005019287 A DE 102005019287A DE 102005019287 A1 DE102005019287 A1 DE 102005019287A1
- Authority
- DE
- Germany
- Prior art keywords
- spindle nut
- sleeve
- spindle
- housing
- push rod
- 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- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H25/2418—Screw seals, wipers, scrapers or the like
-
- 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
- B62D5/0424—Electric motor acting on or near steering gear the axes of motor and final driven element of steering gear, e.g. rack, being parallel
-
- 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
- B62D5/0442—Conversion of rotational into longitudinal movement
- B62D5/0445—Screw drives
- B62D5/0448—Ball nuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Power Steering Mechanism (AREA)
- Pulleys (AREA)
Abstract
Elektromechanische Servolenkung für ein Kraftfahrzeug, mit einer verlagerbaren Schubstange (2), auf deren Spindelabschnitt (3) eine Spindelmutter (10) eines Kugelgewindetriebes (7) angeordnet ist, mit einem Gehäuse (1), das einen Riementrieb (6) zum Antreiben der Spindelmutter (10) und die Spindelmutter (10) aufnimmt, wobei das Gehäuse (1) eine Durchführung (5) für den Spindelabschnitt (13) der Schubstange (2) aufweist, wobei die Spindelmutter (10) an wenigstens einer Stirnseite in die Durchführung (5) hineinragt.Electromechanical power steering for a motor vehicle, with a displaceable push rod (2), on the spindle portion (3) a spindle nut (10) of a ball screw (7) is arranged, with a housing (1) having a belt drive (6) for driving the spindle nut (10) and the spindle nut (10) receives, wherein the housing (1) has a passage (5) for the spindle portion (13) of the push rod (2), wherein the spindle nut (10) at least one end face in the passage (5 ) protrudes.
Description
Gebiet der ErfindungTerritory of invention
Die vorliegende Erfindung betrifft eine elektromechanische Servolenkung für ein Kraftfahrzeug.The The present invention relates to an electromechanical power steering system for a Motor vehicle.
Aus
Zur Reduzierung von Betriebsgeräuschen kann ein Riemen verwendet werden, der aus Kunststoff gebildet ist, beispielsweise EPDM-Material. Dieses Material ändert unter Einwirkung von Fett seine Eigenschaften. Daraus können beispielsweise unerwünschte Längenänderungen des Riemens resultieren, sodass ein Zahnüberspringen auf den Zahnriemenscheiben die Folge sein kann. Derartige Zahnüberspringer müssen auf jeden Fall vermieden werden, da ansonsten die Lenkung nicht mehr einwandfrei funktioniert.for Reduction of operating noise can a belt made of plastic may be used, for example EPDM material. This material changes under the action of fat its properties. This can, for example undesirable changes in length of the belt resulting in a skip on the pulleys the result can be. Such tooth skippers have to be avoided in any case, otherwise the steering is no longer works perfectly.
Aufgabe der vorliegenden Erfindung ist es, eine elektromechanische Servolenkung nach den Merkmalen des Oberbegriffs des Anspruchs 1 anzugeben, bei der dieses Problem behoben ist.task The present invention is an electromechanical power steering according to the features of the preamble of claim 1, at This issue is resolved.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Spindelmutter an wenigstens einer ihrer beiden Stirnseiten in die Durchführung des Gehäuses hineinragt. Selbst wenn Schmierstoff stirnseitig aus der Spindelmutter austritt und radial unter Fliehkrafteinwirkung nach außen geschleudert wird, kann dieser Schmierstoff nicht gegen den Riemen geschleudert werden. Aufgrund der axialen Überlappung der Spindelmutter mit der Durchführung in dem Gehäuse wird der Schmierstoff lediglich gegen die Wandung der Durchführung geschleudert, was unbedenklich ist.According to the invention this Task solved by that the spindle nut on at least one of its two end faces in the implementation of the housing protrudes. Even if the lubricant is the front side of the spindle nut emerges and thrown radially outward under centrifugal force This lubricant can not be thrown against the belt become. Due to the axial overlap the spindle nut with the bushing in the case the lubricant is merely thrown against the wall of the bushing, which is harmless.
Bei einer erfindungsgemäßen Weiterbildung weist die Spindelmutter an wenigstens einer Stirnseite eine Hülse auf, die in die Durchführung des Gehäuses hineinragt. Diese Ausbildung bietet den Vorteil, dass keine besondere Spindelmutter angefertigt werden muß. Vielmehr kann diese Hülse stirnseitig an der Spindelmutter befestigt sein, wobei die Hülse an einer Aufnahme der Hülse gehalten ist, wobei diese Aufnahme am Innenumfang der Spindelmutter ausgebildet sein kann.at a development of the invention has the spindle nut on at least one end face on a sleeve, in the implementation of the housing protrudes. This training offers the advantage that no special Spindle nut must be made. Rather, this sleeve can be on the front side be attached to the spindle nut, wherein the sleeve held on a receptacle of the sleeve is, wherein this receptacle formed on the inner circumference of the spindle nut can be.
Es kann zweckmäßig sein, wenn diese Hülse an ihrem von der Spindelmut ter abgewandten Ende einen einwärts gerichteten Radialbord aufweist. Dieser Radialbord schafft einen zusätzlichen Schmierstoffrückhalt, denn nun ist der lichte Ringspalt zwischen der Hülse und dem Spindelabschnitt der Schubstange deutlich reduziert, sodass lediglich durch diesen schmalen Ringspalt Schmierstoff austreten kann.It may be appropriate if this sleeve on her turned away from the Spindelmut ter end an inwardly directed Radial board has. This radial board creates an extra Lubricant retention, because now is the clear annular gap between the sleeve and the spindle section the push rod significantly reduced, so only through this narrow annular gap lubricant can escape.
Der Außendurchmesser der Hülse innerhalb der Durchführung des Gehäuses ist so bemessen, dass ein Spalt zwischen dem Außenumfang der Hülse und dem Bohrungsdurchmesser der Durchführung gegeben ist. Dieser Spalt ist so bemessen, dass Kippbewegungen der Hülse aufgrund elastischer Verformungen im Betrieb der elektromechanischen Servolenkung ohne Kontakt der Hülse mit der Durchführung gewährleistet sind.Of the outer diameter the sleeve within the implementation of the housing is sized so that a gap between the outer circumference of the sleeve and the bore diameter of the implementation is given. This gap is sized so that tilting movements of the sleeve due to elastic deformation in operation of the electromechanical power steering without contact of Sleeve with the implementation guaranteed are.
In wirtschaftlich günstiger Weise kann die Hülse aus Blech in einem spanlosen Umformverfahren, vorzugsweise Tiefziehen, hergestellt sein. Alternativ kann die Hülse aus Kunststoff im Spritzverfahren hergestellt werden, wobei denkbar ist, die Hülse direkt an die Spindelmutter anzuspritzen.In economically cheaper Way, the sleeve from sheet metal in a non-cutting forming process, preferably thermoforming, be prepared. Alternatively, the sleeve made of plastic by spraying be prepared, it being conceivable, the sleeve directly to the spindle nut to mold.
Nachstehend wird die Erfindung anhand eines in insgesamt drei Figuren abgebildeten Ausführungsbeispieles näher erläutert. Es zeigen:below the invention will be described with reference to a total of three figures embodiment explained in more detail. It demonstrate:
Ausführliche Beschreibung der ZeichnungFull Description of the drawing
An
dem Ende der Schubstange
In
dem Gehäuse
Der
Kugelgewindetrieb
Die
Spindelmutter
Außerhalb
des Bereichs der Spindelmutter
Die
Aufnahme
Der
Kugelgewindetrieb
- 11
- Gehäusecasing
- 22
- Schubstangepushrod
- 33
- Spindelabschnittspindle section
- 44
- ZahnstangenabschnittRack section
- 55
- Durchführungexecution
- 66
- Riementriebbelt drive
- 77
- KugelgewindetriebBall Screw
- 88th
- ZahnriemenscheibeTiming pulley
- 99
- Zahnriementoothed belt
- 1010
- Spindelmutterspindle nut
- 1111
- KugelBullet
- 1212
- Kugelkanalball channel
- 1313
- Kugelrilleball groove
- 1414
- Kugelrilleball groove
- 1515
- Stirnwandbulkhead
- 1616
- Hülseshell
- 1717
- Aufnahmeadmission
- 1818
- Spaltgap
- 1919
- Bohrungswandungbore
- 2020
- ringförmiger Spaltannular gap
- 2121
- Radialbordradial board
- 2222
- ringförmiger Spaltannular gap
- 2323
- Schmierstofflubricant
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005019287A DE102005019287A1 (en) | 2005-04-26 | 2005-04-26 | Electromechanical power steering |
PCT/EP2006/003796 WO2006114268A1 (en) | 2005-04-26 | 2006-04-25 | Electromechanical power steering system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005019287A DE102005019287A1 (en) | 2005-04-26 | 2005-04-26 | Electromechanical power steering |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005019287A1 true DE102005019287A1 (en) | 2006-11-09 |
Family
ID=36593163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005019287A Withdrawn DE102005019287A1 (en) | 2005-04-26 | 2005-04-26 | Electromechanical power steering |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102005019287A1 (en) |
WO (1) | WO2006114268A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012019427A1 (en) * | 2012-10-02 | 2014-04-03 | Trw Automotive Gmbh | Steering rack used as electromechanical power steering apparatus for motor car, has bellows that is arranged at one axial end of rack gear housing, and pressure sensor that is provided for measuring pressure in inside of bellows |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6644432B1 (en) * | 2002-06-27 | 2003-11-11 | Trw Automotive U.S. Llc | Electric power steering assembly |
US6749040B1 (en) * | 1999-09-01 | 2004-06-15 | Delphi Technologies, Inc. | Electric power assisted rack and pinion system |
WO2004062982A1 (en) * | 2003-01-16 | 2004-07-29 | Trw Automotive Gmbh | Belt tightener for a steering booster |
DE102004019313A1 (en) * | 2003-04-15 | 2004-10-28 | Koyo Seiko Co., Ltd. | Electric power steering device |
DE10336867A1 (en) * | 2003-08-11 | 2005-03-10 | Volkswagen Ag | Steering system with electrical assistance for road vehicle has steering column with motor adjacent to it driving nut with ball bearings on spindle |
DE10392534T5 (en) * | 2002-04-12 | 2005-07-14 | Trw Automotive U.S. Llc, Sterling Heights | Electric power steering assembly |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0662092B2 (en) * | 1986-04-11 | 1994-08-17 | 本田技研工業株式会社 | Electric power steering device |
JP3454502B2 (en) * | 2000-03-15 | 2003-10-06 | Thk株式会社 | Lubricating oil supply device and rolling element screw device using the same |
KR100625072B1 (en) * | 2002-01-29 | 2006-09-19 | 가부시키가이샤 제이텍트 | Electric power steering apparatus |
DE10331598A1 (en) * | 2003-07-11 | 2005-02-10 | Zf Lenksysteme Gmbh | actuator |
-
2005
- 2005-04-26 DE DE102005019287A patent/DE102005019287A1/en not_active Withdrawn
-
2006
- 2006-04-25 WO PCT/EP2006/003796 patent/WO2006114268A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6749040B1 (en) * | 1999-09-01 | 2004-06-15 | Delphi Technologies, Inc. | Electric power assisted rack and pinion system |
DE10392534T5 (en) * | 2002-04-12 | 2005-07-14 | Trw Automotive U.S. Llc, Sterling Heights | Electric power steering assembly |
US6644432B1 (en) * | 2002-06-27 | 2003-11-11 | Trw Automotive U.S. Llc | Electric power steering assembly |
WO2004062982A1 (en) * | 2003-01-16 | 2004-07-29 | Trw Automotive Gmbh | Belt tightener for a steering booster |
DE102004019313A1 (en) * | 2003-04-15 | 2004-10-28 | Koyo Seiko Co., Ltd. | Electric power steering device |
DE10336867A1 (en) * | 2003-08-11 | 2005-03-10 | Volkswagen Ag | Steering system with electrical assistance for road vehicle has steering column with motor adjacent to it driving nut with ball bearings on spindle |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012019427A1 (en) * | 2012-10-02 | 2014-04-03 | Trw Automotive Gmbh | Steering rack used as electromechanical power steering apparatus for motor car, has bellows that is arranged at one axial end of rack gear housing, and pressure sensor that is provided for measuring pressure in inside of bellows |
Also Published As
Publication number | Publication date |
---|---|
WO2006114268A1 (en) | 2006-11-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 H, DE |
|
R012 | Request for examination validly filed |
Effective date: 20110829 |
|
R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120822 Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120822 |
|
R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20140213 Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20140213 |
|
R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20150127 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |