EP2563636A1 - Bearing bush assembly for a telescopic steering shaft and steering system equipped therewith - Google Patents
Bearing bush assembly for a telescopic steering shaft and steering system equipped therewithInfo
- Publication number
- EP2563636A1 EP2563636A1 EP11703450A EP11703450A EP2563636A1 EP 2563636 A1 EP2563636 A1 EP 2563636A1 EP 11703450 A EP11703450 A EP 11703450A EP 11703450 A EP11703450 A EP 11703450A EP 2563636 A1 EP2563636 A1 EP 2563636A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing bush
- arrangement
- bushing
- bush
- bearing
- 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- Withdrawn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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/185—Steering columns yieldable or adjustable, e.g. tiltable adjustable by axial displacement, e.g. telescopically
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
Definitions
- the invention relates to a bearing bush arrangement for a telescopic, an outer tube and an inner tube having steering shaft according to the preamble of claim 1 and a steering system equipped therewith for a motor vehicle according to the preamble of the independent claim. Furthermore, the invention relates to an assembly consisting of steering shaft and bearing bush arrangement and their use for a steering system. In particular, the invention relates to a bearing bushing arrangement and a steering system equipped therewith, wherein the bearing bush arrangement for axially movable and sealing connection of the inner tube with the outer tube from a fitting on the inner tube, consisting of an inelastic plastic bearing bush and an injection molded from a having elastic plastic existing sealing element.
- a bearing bush arrangement comprising a bearing bush and a sealing element is provided, which is designed as a sealing ring or scraper and serves to guide the inner tube in the outer tube and at the same time seal both tubes against each other.
- a bearing bush arrangement is proposed which is suitable for a telescopic, a Outer tube and an inner tube having steering shaft is provided.
- the local bearing bushing arrangement has a made of inelastic, hard plastic, namely polyamide, existing bearing bush and a molded-on, made of a soft elastic plastic, namely an elastomer or plastic rubber, existing sealing element, whereby an axially movable and sealing connection between the inner tube and outer tube is created.
- the sealing element designed as a sealing ring or scraper has, in particular, a sealing lip which bears against the inner tube or the inner steering shaft.
- the present invention is therefore based on the object to further improve a bearing bush arrangement of the type mentioned, so that the above-mentioned disadvantages are overcome in an advantageous manner.
- the bearing bush arrangement should have a sealing and at the same time noise-reducing effect.
- a bearing bush arrangement which has for axially movable and sealing connection of the inner tube with the outer tube an applied to the inner tube, consisting of an inelastic plastic bearing bush and molded thereon, consisting of an elastic plastic sealing element, wherein the bearing bush of a elastic bushing, in particular rubber bushing is included, which in turn is covered by an end portion of the outer tube.
- an assembly for a steering system with a telescopic steering shaft and such a bearing bush arrangement is proposed.
- a steering system equipped therewith is proposed. Characterized in that the bushing of an elastic bushing, in particular
- Rubber bushing is included, results in a damping acting in particular in the radial direction between the bearing bush and the outer steering shaft tube (outer tube), whereby the noise or - admir is deutlcih reduced.
- the elastic bushing or rubber bushing preferably has web-shaped elements, in particular crowned webs, which extend outward on their outer circumference and which achieve particularly effective radial damping. It is also advantageous if the elastic bushing, in particular rubber bushing, has at least one sealing lip extending in the axial direction, which also achieves an increased damping effect in the axial direction.
- the bearing bushing arrangement is designed in three parts by having an inner made of hard plastic bearing bush, a molded-on sealing element (scraper) made of soft elastic plastic and the bearing bush enclosing elastic bushing, in particular rubber bushing.
- the construction can also be carried out in two parts by the bearing bush is covered with a one-piece elastic member which performs both the sealing function (scraper function) as well as the damping function (rubber bushing function). Accordingly, therefore, the bearing bush of at least one elastic component holistic, but preferably in sections of two components (scrapers, rubber bushing), sheathed.
- the rubber bush not only has the radially extending crowned webs on its outer circumference, but also has radial contact surfaces.
- the crowned webs and the radial abutment surfaces alternately arranged on the outer circumference of the rubber bushing.
- the elastic bush in particular rubber bush, has at least one sealing lip extending in the axial direction.
- the bearing bush arrangement may comprise a retaining cap which comprises the end portion of the outer tube, which in turn comprises the elastic bushing, in particular rubber bushing. It is advantageous if the elastic bush or rubber bushing and / or the sealing element designed in particular as a scraper in the outer diameter smaller than that
- Inner diameter of the retaining flap is so that a radial clearance remains.
- the sealing element designed in particular as a scraper can have at least one first sealing in the axial direction against the retaining cap; also have at least one second in the radial direction against the retaining cap fitting seal. It is advantageous if at least one of the seals has two or more sealing lips, which are arranged in a V-shape.
- the bearing bush can have at least one radially extending projection, which is encapsulated by a portion of the sealing element.
- Fig. 1 shows a sectional view of the structure of a bearing bush arrangement according to the invention in the installation situation;
- Fig. 2 is a complete view of the bushing assembly;
- Fig. 3a in a sectional view illustrates the multi-part construction of the bearing bush arrangement in more detail
- Fig. 3b corresponds to a detail view from the sectional view of Fig. 3b.
- Fig. 1 shows the embodiment of a bearing bush arrangement 100 according to the invention in the installation situation, i. in the mounted state on a telescopic steering shaft having an inner tube 1 10 and an outer tube 120.
- Bearing arrangement 100 has an annular bearing bush 10, which rests against the inner tube 1 10 of the steering shaft and is provided with a molded-on to the bearing bush 10 seal member 30.
- the sealing element is designed in the form of a sealing ring or scraper 30 and sealingly abuts against the inner tube 110.
- the bushing arrangement 100 has an elastic bushing in the form of a rubber bushing 20, which includes the bearing bush 10 from the outside and comes into contact with the outside of the outer shaft 120 of the steering shaft.
- the rubber bushing 20 is thus arranged between the bearing bush 10 and outer tube 120 and causes a significant reduction occurring vibration development and development and transmission of vibrations and a reduction of any noise caused thereby. Also, a larger clearance 1 15 between inner tube 1 10 and outer tube 120 are dimensioned.
- the bushing 20 is preferably made of rubber, since investigations of the applicant have shown that this material is particularly well suited to achieve sufficient elasticity or damping, without the mechanical coupling between outer tube 120 and inner tube 1 10 of the steering shaft so strong reduce that the penetration of the steering handle (steering wheel) to the steering or the reaction of the wheels, the driver's steering feel is adversely affected.
- two opposing goals can be achieved: The occurrence of vibrations and any associated noise can be significantly reduced and the "feedback from the road" required by the driver remains fully intact
- the damping properties and mechanical coupling properties can be adapted very well to the respective steering. This applies both with regard to the rubber compound used as well as with respect to the dimensioning of the bushing itself. Instead of rubber, in principle, any other resilient material can be used.
- the elastic bushing or rubber bushing 20 has special design features in the form of radially aligned crowned webs 23 and / or contact surfaces (see FIG. 2) as well as axially aligned elastic elements in the form of sealing lips 27, which will be described in more detail below.
- the sealing element or the wiper 30 itself fulfills both the task of a radial seal against the inner tube 1 10 and the task of axial sealing against a retaining flap 130, which surrounds the entire bearing bush arrangement at least in the head region or end portion and in particular with further sealing lips 35th of the scraper 30 seals.
- the scraper 30 also has axial abutment surfaces 36 for sealing against the rubber bushing 20.
- the axial sealing point of the scraper to the retaining flap is designed by a seal or structure with two sealing lips 35 so that it is also suitable for damping axial vibrations.
- the sealing lips 35 in radial section a V-shape, which causes the sealing lips abut only in a very thin line on the retaining flap 130 and thus can easily cushion by their oblique employment.
- the sealing lips also perceive the actual sealing, so that the cavity between the two lips 35, which is required for the pulsation, is not filled up by particles and / or liquids. If a large axial load (force in or counter to the X direction) acts on the wiper 30, then the sealing lips 35 lie flat against the retaining flap 130, so that the force transmission has a large contact surface available. In this case, the damping function assumes a subordinate priority.
- the rubber bushing 20 which is mounted on the bearing bush 10, by means of a plurality of crowned webs 24 (see also Fig. 2) acts as a damping element for radially occurring vibrations (in or against Y-direction) between bearing bush 10 (guide bush) and outer tube 120.
- the rubber bushing 20 With the double-sided running axial sealing lip structure 27, the rubber bushing 20 thus acts as an axial seal against the outer tube 120 and also against the scraper 30th
- the bearing bush has a shoulder 19, with which the rubber bushing 20 is held axially.
- sealing lips are tuned by matching the material elasticity between wiper 30 and rubber bushing 20 and the formula elasticity to each other.
- an optimized compromise between reliable tightness and maximum axial vibration damping is realized.
- By changing the material properties of the rubber bush and the radial transverse stiffness can be influenced, so that can also influence the radial damping properties.
- the crowned webs 24 of the radial guide of the rubber bushing 20 have the following effect in particular: Due to their crowning, only a very small part of the rubber material lies on the outer tube during normally occurring operating forces. Thus, radial vibrations can be very well damped by the flexibility of the webs 24 and because of the available escape space within the guides in the outer tube, since the rubber material can be deformed with little radial force. This property also benefits the low displacement force. Thus, by means of the rubber bushing 20 also a fluctuation of the displacement force of the telescopic shaft and pulling be reduced or avoided, as can occur conventionally in tubes with straightness errors and rigid guide.
- rubber bushing 20 and the wiper 30 for the desired damping effect have radial clearances, so that the material can dodge.
- rubber bushing 20 and wiper 30 are dimensioned smaller in diameter than the retaining flap 130, i. the whole unit is stored floating.
- connection between the bearing bush 10 and the sealing ring or scraper 30 molded onto it is specially designed to solve the following problem:
- the bearing bush 10 and the sealing element 30 can be formed as a one-piece component by the softer sealing element 30 is molded onto the harder bearing bush 10.
- DE 10 2006 012 057 A1 proposes for this purpose to provide a ribbed tooth system pronounced on the bearing bushing on the front side, whereby due to the shrinkage during cooling after the injection process the injection molded sealing element engages with the ribbed toothing of the Bearing clawed.
- this design has the disadvantage that only then a sufficiently strong compound of both plastics results when sufficient material shrinkage during cooling occurs after the injection process.
- the design principle described with reference to FIGS. 3 a and 3 b is proposed, in which the bearing bush 10 has at one end a projection 1 1 extending in the radial direction Y, which in turn is supported by a section 31 of FIG Sealing element or stripper 30 is encapsulated. This results in a radial direction embracing the wiper 30 around the projection 1 1 of the bearing bush 10 around, whereby a reliable connection between the bearing bush 10 and scraper 30 is made substantially independent of the shrinkage process during cooling.
- the extending in the radial direction projection 1 1 is preferably formed as an annular ridge which is attached to one side of the bearing bush 10.
- the sealing element or the wiper 30 surrounds this web 1 1 during the injection process, so that wiper 30 and bearing bush 10 are fixed to each other.
- This injection process eliminates the need for subsequent assembly.
- this positive locking is not dependent on the fact that when cooling after the injection process, a sufficiently large shrinkage occurs.
- the invention described achieves a significant damping of radially and / or axially occurring vibrations and thus a significant noise reduction in the steering system.
- the positive connection in the multi-part bearing bush arrangement is improved. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Sealing Devices (AREA)
- Support Of The Bearing (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010028297.9A DE102010028297B4 (en) | 2010-04-28 | 2010-04-28 | Bushing arrangement for a telescopic steering shaft and steering system equipped therewith |
PCT/EP2011/051964 WO2011134688A1 (en) | 2010-04-28 | 2011-02-10 | Bearing bush assembly for a telescopic steering shaft and steering system equipped therewith |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2563636A1 true EP2563636A1 (en) | 2013-03-06 |
Family
ID=44059086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11703450A Withdrawn EP2563636A1 (en) | 2010-04-28 | 2011-02-10 | Bearing bush assembly for a telescopic steering shaft and steering system equipped therewith |
Country Status (7)
Country | Link |
---|---|
US (1) | US8827558B2 (en) |
EP (1) | EP2563636A1 (en) |
CN (1) | CN102939234B (en) |
BR (1) | BR112012027801B1 (en) |
DE (1) | DE102010028297B4 (en) |
RU (1) | RU2564435C2 (en) |
WO (1) | WO2011134688A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102151110B1 (en) * | 2014-06-11 | 2020-09-02 | 현대모비스 주식회사 | Bearing bush |
DE102014216670B4 (en) | 2014-08-21 | 2016-05-19 | Ford Global Technologies, Llc | bearing bush |
DE202014103932U1 (en) | 2014-08-21 | 2014-09-19 | Ford Global Technologies, Llc | Bushing and vibration damping connection arrangement |
DE102014216672A1 (en) | 2014-08-21 | 2016-02-25 | Ford Global Technologies, Llc | Bushing and vibration damping connection arrangement |
DE102014016276A1 (en) * | 2014-11-05 | 2016-05-12 | Thyssenkrupp Ag | stop damper |
US10100873B2 (en) | 2014-12-09 | 2018-10-16 | Ford Global Technologies, Llc | Radially deflectable bushing and steering gear assembly using the same |
GB201604738D0 (en) * | 2016-03-04 | 2016-05-04 | Trw Steering Systems Poland Sp Z O O | A steering column assembly |
US11718257B2 (en) * | 2016-12-15 | 2023-08-08 | Zf Passive Safety Systems Us Inc | Coupling device for mounting an airbag module to be oscillating on a vehicle steering wheel |
DE102016124530A1 (en) * | 2016-12-15 | 2018-06-21 | Trw Automotive Safety Systems Gmbh | Coupling device for vibratory mounting of a gas bag module to a vehicle steering wheel |
DE102017122102A1 (en) * | 2017-09-25 | 2019-03-28 | HELLA GmbH & Co. KGaA | Adjustment device for adjusting the position of at least one light module in the housing of a headlight |
FR3075103B1 (en) * | 2017-12-20 | 2019-11-22 | Aktiebolaget Skf | SUSPENSION STOP DEVICE AND FORCE LEG EQUIPPED WITH SUCH A DEVICE |
KR20240033489A (en) * | 2022-09-05 | 2024-03-12 | 현대자동차주식회사 | Steering wheel and damper unit of the steering wheel |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3955859A (en) * | 1975-03-25 | 1976-05-11 | The Torrington Company | Bearing with multiple lip seal |
CA1071257A (en) * | 1977-01-25 | 1980-02-05 | West And Son (Engineers) Limited | Annular elements |
DE2922437A1 (en) | 1979-06-01 | 1980-12-11 | Fichtel & Sachs Ag | TWO-TUBE VIBRATION DAMPER WITH UNIVERSALLY APPLICABLE PISTON ROD GUIDE |
IT1144348B (en) * | 1981-05-08 | 1986-10-29 | Iao Industrie Riunite Spa | IMPROVEMENTS IN TELESCOPIC HYDRAULIC SHOCK ABSORBERS OF THE BITUBO TYPE |
DE3720930A1 (en) | 1987-06-25 | 1989-01-05 | Freudenberg Carl Fa | RADIAL SHAFT SEAL |
US5421591A (en) * | 1990-02-26 | 1995-06-06 | Zahnradfabrik Friedrichshafen Ag | Sealing arrangement |
JP2517808Y2 (en) * | 1990-05-10 | 1996-11-20 | 株式会社ユニシアジェックス | Rod guide for double cylinder type hydraulic shock absorber |
DE69202403T2 (en) * | 1991-06-15 | 1995-09-14 | Acg France | Master cylinder and gasket therefor. |
US5380016A (en) | 1992-11-12 | 1995-01-10 | Caterpillar Inc. | Radial lip seal |
JP3358359B2 (en) * | 1994-12-28 | 2002-12-16 | オイレス工業株式会社 | Bearing for steering column |
JP3270658B2 (en) | 1995-06-30 | 2002-04-02 | 富士機工株式会社 | Plain bearing |
US5722300A (en) * | 1996-08-16 | 1998-03-03 | General Motors Corporation | Motor vehicle steering column |
RU2157326C1 (en) * | 1999-04-07 | 2000-10-10 | Общевойсковая академия ВС РФ | Vehicle steering gear |
DE10312050A1 (en) * | 2003-03-18 | 2004-10-07 | Spicer Gelenkwellenbau Gmbh & Co. Kg | Sealing arrangement for the length compensation of a universal joint shaft |
US7401789B2 (en) * | 2005-06-07 | 2008-07-22 | Trw Automotive U.S. Llc | Rack bushing for rack and pinion steering assembly |
DE102006012057A1 (en) | 2006-03-08 | 2007-09-13 | Dittmann, Ludwig, Dipl.-Ing. | Bearing system for a two-piece steering shaft |
US20070262530A1 (en) * | 2006-05-11 | 2007-11-15 | Mando Corporation | Sealing part structure of hydraulic power steering apparatus |
US8387990B2 (en) * | 2008-09-09 | 2013-03-05 | Trelleborg Sealing Solutions Americas | Seal assembly |
-
2010
- 2010-04-28 DE DE102010028297.9A patent/DE102010028297B4/en active Active
-
2011
- 2011-02-10 WO PCT/EP2011/051964 patent/WO2011134688A1/en active Application Filing
- 2011-02-10 BR BR112012027801-0A patent/BR112012027801B1/en active IP Right Grant
- 2011-02-10 EP EP11703450A patent/EP2563636A1/en not_active Withdrawn
- 2011-02-10 RU RU2012150845/11A patent/RU2564435C2/en active
- 2011-02-10 CN CN201180028413.5A patent/CN102939234B/en active Active
-
2012
- 2012-10-26 US US13/661,336 patent/US8827558B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011134688A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2012150845A (en) | 2014-06-10 |
CN102939234B (en) | 2015-09-30 |
US20130118291A1 (en) | 2013-05-16 |
WO2011134688A1 (en) | 2011-11-03 |
RU2564435C2 (en) | 2015-09-27 |
CN102939234A (en) | 2013-02-20 |
BR112012027801B1 (en) | 2020-12-22 |
US8827558B2 (en) | 2014-09-09 |
DE102010028297B4 (en) | 2023-08-24 |
DE102010028297A1 (en) | 2011-12-01 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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DAX | Request for extension of the european patent (deleted) | ||
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KRAUS, ACHIM Inventor name: URBAN, RALF Inventor name: KUBISCH, SEBASTIAN Inventor name: HEINTSCHEL, MANFRED |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20140902 |