US20010011486A1 - Steering column for a motor vehicle - Google Patents
Steering column for a motor vehicle Download PDFInfo
- Publication number
- US20010011486A1 US20010011486A1 US09/303,434 US30343499A US2001011486A1 US 20010011486 A1 US20010011486 A1 US 20010011486A1 US 30343499 A US30343499 A US 30343499A US 2001011486 A1 US2001011486 A1 US 2001011486A1
- Authority
- US
- United States
- Prior art keywords
- jacket tube
- deformation
- steering column
- deflecting
- deformation element
- 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.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 238000001179 sorption measurement Methods 0.000 claims abstract description 3
- 238000005452 bending Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 239000011796 hollow space material Substances 0.000 claims 2
- 239000002184 metal Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000284 resting effect Effects 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
- B62D1/195—Yieldable supports for the steering column
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/123—Deformation involving a bending action, e.g. strap moving through multiple rollers, folding of members
Abstract
A steering column for a motor vehicle has a steering shaft rotatably mounted in a jacket tube. The jacket tube has at least one plastically deformable deformation element associated therewith, with energy adsorption during axial displacement of the jacket tube. The at least one deformation element is secured on at least one side to the jacket tube and abuts a deflecting structure that is permanently attached to the body, and positioned axially with respect to the deformation element in such fashion that the deformation element is deformed with the aid of the deflecting structure during an axial displacement of the jacket tube.
Description
- This application claims the priority of German application DE 198 19 713.6 filed in Germany on May 2, 1998, the disclosure of which is expressly incorporated by reference herein.
- The invention relates to a steering column for a motor vehicle with a steering shaft rotatably mounted in a jacket tube, with the jacket tube having at least one deformation element associated therewith, said deformation element being plastically deformable with energy absorption during axial displacement of the jacket tube.
- A steering column of the above described general type is known from German Published Unexamined Patent Application No. DE 28 21 707 A1, said column being connected with the body by a deformation element. The deformation element is in the form of a U-shaped energy-absorbing metal strip. A free end of one leg is connected with the steering column and the free end of the other leg is connected with the body. In addition, the metal strip is housed in a box in which the legs of the strip abut opposite sides of the box. When the steering column is displaced axially relative to the body, the metal strip is subjected to so-called rolling bending defined by the position of the strip in the box.
- A steering column of the above described general type is also known from German Patent No. DE 195 42 491 A1, said column having an axially displaceable jacket tube supported integrally on the body by an energy-absorbing deformation member. A bent metal band is provided as the deformation member, said band being connected permanently at one end with the jacket tube and at the other end with the body. The metal band is also accommodated in a guide in which it is deformable either by linear displacement or by rolling bending.
- A steering column for a motor vehicle is known from German Published Examined Application DT 16 30 882 B2, said column comprising a jacket tube for a steering shaft inserted into a sleeve-shaped receptacle integral with the vehicle. A rigid shaping tool is also mounted on the receptacle. This tool plastically deforms the jacket tube with energy absorption during axial displacement of the jacket tube relative to the receptacle. In a modified embodiment, the shaping tool is mounted on the jacket tube and upon an axial displacement of the jacket tube, deforms the receptacle on which the jacket tube is mounted, including the shaping tool.
- A goal of the invention is to provide a steering column of the type recited at the outset that exhibits improved deformation behavior.
- This goal is achieved according to the invention by the fact that the (at least one) deformation element is secured at least unilaterally to the jacket tube and abuts deflection structure mounted on the body, said deflection structure being positioned axially with respect to the deformation element in such fashion that the deformation element is deformed by the deflecting structure when the jacket tube is displaced axially. The deformation element together with the jacket tube is moved past the deflecting structure, resulting in a deliberate and very precisely calculable deformation of the deformation element. The arrangement of the deflecting structure integrally with the body, and hence integrally with the vehicle, also ensures a specific axial displacement of the jacket tube.
- In certain preferred embodiments of the invention, the deflecting structure has at least a first rigid deflecting element and at least a second deflecting element associated therewith that fit around the at least one deformation element. As a result, the deformation element is guided and positioned exactly.
- In certain preferred embodiments of the invention, the first deflecting element and/or second deflecting element are in flush contact with the deformation element. When the deformation element moves relative to the deflecting elements, frictional work can be done deliberately, absorbing additional energy. In another embodiment of the invention, the deformation element is in the form of an elongate flat element. In this manner, the entire arrangement can be produced in a manner that saves both space and weight.
- In certain preferred embodiments of the invention, the deformation element is subjected to continuous plastic deformation during an axial displacement of the jacket tube. The deformation element is deformed in a spatially limited way, with the deformation propagating like a wave through the deformation element from the standpoint of the deformation element. Since the deformation element is deformed twice at every point through which the deformation passes, firstly from a non-deformed state into a deformed state and secondly back again into the initial state, an especially high degree of deformation results and hence the arrangement has a large energy absorption capacity.
- In certain preferred embodiments of the invention, the deformation element is subjected to rolling bending during axial displacement. The rolling bending constitutes a special case of plastic deformation that passes through the deformation element. The deformation element is unrolled on the relative surface and likewise continuously deformed. Rolling bending can be performed deliberately and in a manner that can be determined in advance with the aid of the deflecting structure mounted on the body.
- In certain preferred embodiments of the invention, the deformation element is forcibly guided between a first deflecting element in the form of a mount that is aligned transversely to the displacement direction of the jacket tube and a second deflecting element in the form of an opposite mount. Preferably, the mount is located offset with respect to both the opposite mount and to the fastening point of a deformation element on the jacket tube, axially opposite the displacement direction of the jacket tube. In this manner, high contact forces between the deformation element and a mount can be produced by displacing the jacket tube.
- In certain preferred embodiments of the invention, the deformation element is forcibly guided between a first deflecting element in the form of a mount that is made wedge-shaped in the displacement direction of the
jacket 2 and the second deflection element in the form of an opposite mount. With the aid of the wedge-shaped mount, the deformation element can deflect from its initial position with plastic deformation during displacement of the jacket tube. The opposite mount then serves as an additional guide. - In certain preferred embodiments of the invention, a guide gap is formed between the mount and the opposite mount that is aligned at an angle to the displacement direction of the jacket tube. Depending on the alignment and dimensioning of the guide gap, larger or smaller frictional forces can be produced between the mount and the opposite mount on the one hand and the deformation element on the other hand.
- Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings.
- FIG. 1 is a perspective view of a steering column constructed according to a first preferred embodiment of the invention;
- FIG. 2 is a perspective view of a steering column constructed according to a second preferred embodiment of the invention;
- FIG. 3 is a sectional view of the steering column according to FIG. 1 with the jacket tube shown in its normal resting position;
- FIG. 4 is a sectional view through the steering column according to FIG. 1, with the jacket tube shown in an axially displaced position;
- FIG. 5 shows a sectional view through the steering column in FIG. 2, with the jacket tube of the steering column shown in its normal resting position, and FIG. 6 is a sectional view through the steering column according to FIG. 2, with the jacket tube shown in an axially displaced position.
- FIGS. 1, 3, and4 show a first embodiment of a steering column 1 according to the invention for a motor vehicle. Steering column 1 comprises a
jacket tube 2, in which asteering shaft 3 is rotatably mounted.Steering shaft 3 can be operated from asteering wheel 4 by the driver of the motor vehicle. -
Jacket tube 2 is attached to the body of the motor vehicle, not shown, by anupper mount 5 and alower mount 6. For this purpose, theupper mount 5 is attached to thejacket tube 2 by aconnector 2 a, with theconnector 2 a being secured by one or moreriveted connections 7 to theupper mount 5. Thelower mount 6 has deflecting structure on the body in the form of fourdeflecting elements elements jacket tube 2 that forms the main axis of steering column 1.Tubular sections deformation elements deflection elements respective deformation elements -
Deformation elements jacket tube 2 inareas - In the resting position of
jacket tube 2 shown in FIG. 3, thefastening areas jacket tube 2 are located at approximately the same height as theopposite mounts tubular mounts deformation elements mounting areas jacket tube 2, initially can be guided by thetubular mounts opposite mounts Mounts opposite mounts mounting housing 14 that forms a guide gap for the associateddeformation elements opposite mounts Deformation elements housing 14,mounts opposite mounts - In the event of a vehicle collision in which the
steering wheel 4,steering shaft 3, andjacket tube 2 are subjected to an axial impact load, for example as the result of an impact between the driver of the vehicle and the steering wheel 4 (or on the other hand, of an axial displacement of the front end of the motor vehicle caused by an impact),jacket tube 2 leaves its resting position shown in FIG. 3 and moves in the direction of arrow V (or in the opposite direction) into a deflected position shown in FIG. 4. Provision is made such that rivetedconnection 7 shears off first, whereupon a certain resistance to tearing free is overcome that prevents inadvertent displacement ofjacket tube 2. During the displacement ofjacket tube 2, thedeformation elements fastening areas deformation elements elements deformation element lower mount 6. - In a modified embodiment, mounts9,12 are located so that they can rotate around their cylinder axes or are provided with especially smooth and therefore low-friction surfaces so that the
deformation elements mounts deformation elements elements - The two mounts,9 and 12, the two
opposite mounts deformation elements jacket tube 2. In modified embodiments, any number ofdeformation elements 10 including associated deflectingelements jacket tube 2. - FIGS. 2, 5, and6 show a
steering column 20 for a motor vehicle, said column constituting another embodiment of the steering column according to the invention. Parts that are the same have been given the same reference numbers as in the first embodiment.Steering column 20, like steering column 1, has ajacket tube 2 in which a steering shaft is rotatably mounted.Jacket tube 2 in turn is mounted on the vehicle body by anupper mount 5 and a lower mount 6A, with one ormore riveted connections 7 providing a supplementary shapewise mounting ofjacket tube 2 by a connector to theupper mount 5. - In the vicinity of lower mount6A,
identical deformation elements 21 are each fastened by means of a mountingtab 24 opposite one another onjacket tube 2.Deformation elements 21 are each made in the form of flat elements shaped into a profile and are permanently connected at the contact points withjacket tube 2 or a mountingtab 24 attached to the jacket tube. Bothdeformation elements 21 have associated with them a first deflecting element in the form of amount 22 that is made wedge-shaped in the displacement direction of the jacket tube (arrow V) and a second deflecting element in the form of anopposite mount 23.Mount 22 andopposite mount 23 are made from dimensionally stable sheet metal and fit around the associateddeformation element 21, withopposite mount 23 disposed in a cavity betweendeformation element 21 andjacket tube 2. Betweenmount 22 and the correspondingopposite mount 23, a guide gap is formed that is aligned at an acute angle to the axis ofjacket tube 2 or to the displacement direction of the jacket tube.Deformation elements 21 are each forcibly guided with limited play in the guide gap betweenmount 22 andopposite mount 23. The energy adsorption capacity of the mount can be influenced by changing the alignment of the guide gap. - In addition, guide gaps are formed between the
mounts 22 and thejacket tube 2 for the associateddeformation element 21. - The function of the
steering column 20 according to the invention can be represented as follows. In a vehicle collision, the driver of the vehicle may impactsteering wheel 4, causing thesteering column 3 includingjacket tube 2 to be displaced in the direction of arrow V relative to themounts 5,6A integral with the body. During such an axial displacement ofjacket tube 2, thedeformation elements 21 connected therewith are pressed against the wedge-shapedholder 22, guided to the respectively associated guide gap betweenmount 22 andopposite mount 23, and pushed againstmounts tabs 24 and are subjected to continuous plastic deformation by which they are pressed successively in a radial direction againstjacket tube 2. In this manner, the motion energy of the jacket tube is converted into deformation work at the deformation elements, and, depending on the surface shape, more or less frictional work is done in the guide gaps betweenmounts 22 on the one hand andopposite mounts 23 or thejacket tube 2 on the other hand. - In the embodiment of FIGS. 2, 5 and6, the
deformation elements 21 are made as elongate flat elements in the form of rectangular metal strips shaped to form a tub-shaped profile. - Of course, a steering column according to the invention can also be mounted on a motor vehicle body by a plurality of
mounts 6, 6A offset axially with respect to one another, with amount 6, 6A consisting of one or more structural units arranged aroundjacket tube 2, said units consisting of at least onedeformation element mount opposite mount - The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.
Claims (15)
1. Steering column for a motor vehicle with a steering shaft rotatably mounted in a jacket tube, with a deformation element being associated with the jacket tube, said deformation element, during axial displacement of the jacket tube, being plastically deformable with energy adsorption,
wherein the deformation element is secured at least unilaterally on the jacket tube and abuts deflecting structure mounted permanently on a vehicle body, said deflecting structure being positioned axially with respect to the deformation element in such fashion that the deformation element is deformed with the aid of the deflecting structure during an axial displacement of the jacket tube.
2. Steering column according to , wherein the deflecting structure has at least one first rigid deflecting element and at least one second deflecting element associated therewith, said elements fitting around the deformation element.
claim 1
3. Steering column according to , wherein at least one of the first and second deflecting elements is in flush contact with the deformation element.
claim 2
4. Steering column according to one of , wherein the deformation element is designed as an elongate flat element.
claim 1
5. Steering column according to , wherein the deformation element is designed as an elongate flat element.
claim 3
6. Steering column according to , wherein the deformation element is subjected to plastic deformation as it passes through the deflecting structure during axial displacement of the jacket tube.
claim 1
7. Steering column according to , wherein the deformation element is subjected to rolling bending during an axial displacement of the jacket tube.
claim 6
8. Steering column according to , wherein a mount with a convex surface section is provided as the deflecting structure, by which convex surface section the deformation element is deflected during axial displacement.
claim 7
9. Steering column according to , wherein the deflecting structure includes first and second deflecting elements in the form of respective facing first and second mounts, and
claim 1
wherein deformation element is forcibly guided between the first deflecting element in the form of a mount that is aligned transversely to the displacement direction of the jacket tube, and the second deflecting element in the form of an opposite mount.
10. Steering column according to , wherein the deflecting structure includes first and second deflecting elements, and
claim 1
wherein the deformation element is forcibly guided between the first deflecting element in the form of a mount that is wedge-shaped in the displacement direction of the jacket tube and the second deflecting element in the form of an opposite mount.
11. Steering column according to , wherein a guide gap aligned at an angle to the displacement direction of the jacket tube is formed between the mount and the opposite mount, through which gap the deformation element is guided.
claim 10
12. Steering column according to , wherein the deformation element is designed as a flat element shaped into a profile, said flat element delimiting a hollow space together with the jacket tube, said opposite mount being disposed in the hollow space.
claim 10
13. Steering column according to , wherein a plurality of said deformation elements are disposed at respective different circumferential positions on the jacket tube, and
claim 1
wherein said deflection structure includes deflection structure for each of said deformation elements.
14. Steering column according to , wherein two of said deformation elements are provided.
claim 13
15. Steering column according to , wherein said two deformation elements are similar to one another and comprise an elongated flat element.
claim 14
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19819713.6-21 | 1998-05-02 | ||
DE19819713A DE19819713C2 (en) | 1998-05-02 | 1998-05-02 | Steering column for a motor vehicle |
DE19819713 | 1998-05-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010011486A1 true US20010011486A1 (en) | 2001-08-09 |
US6349610B2 US6349610B2 (en) | 2002-02-26 |
Family
ID=7866535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/303,434 Expired - Fee Related US6349610B2 (en) | 1998-05-02 | 1999-05-03 | Steering column for a motor vehicle |
Country Status (3)
Country | Link |
---|---|
US (1) | US6349610B2 (en) |
DE (1) | DE19819713C2 (en) |
SE (1) | SE521506C2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050006891A1 (en) * | 2003-05-15 | 2005-01-13 | Hideaki Okamoto | Steering column supporting apparatus |
US20060001249A1 (en) * | 2003-12-04 | 2006-01-05 | Nacam France Sas, A Corporation Of France | Energy absorption device for steering column |
US20060290129A1 (en) * | 2005-05-26 | 2006-12-28 | Aisin Seiki Kabushiki Kaisha | Shock-absorption steering device |
WO2018210874A1 (en) * | 2017-05-18 | 2018-11-22 | Trw Automotive Gmbh | Steering column assembly |
US11807293B2 (en) | 2019-03-12 | 2023-11-07 | Thyssenkrupp Presta Ag | Adjustment drive for a steering column, and steering column for a motor vehicle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10039792A1 (en) | 2000-08-16 | 2002-02-28 | Daimler Chrysler Ag | Steering column for a motor vehicle |
EP2286144A2 (en) * | 2008-05-05 | 2011-02-23 | 3M Innovative Properties Company | Light source module |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU413900B2 (en) * | 1967-06-07 | 1971-05-31 | Owens Illinois, Inc | Positive traction system for vehicles |
GB1584984A (en) * | 1977-05-18 | 1981-02-18 | Accles & Pollock Ltd | Energy-absorbing steering columns |
JPS6376578A (en) * | 1986-09-19 | 1988-04-06 | Hitachi Ltd | Automatic binarization system |
JPH0645415Y2 (en) * | 1987-08-04 | 1994-11-24 | 本田技研工業株式会社 | Impact energy absorption mechanism in automobile steering system |
FR2714649B1 (en) * | 1994-01-06 | 1996-03-15 | Nacam | Energy absorption device, in particular for a motor vehicle steering column. |
GB2291840A (en) * | 1994-07-29 | 1996-02-07 | Torrington Co | Vehicle steering column reach adjustment and energy absorbing mechanism |
DE69601406T2 (en) * | 1995-10-17 | 1999-06-10 | Gen Motors Corp | Energy-absorbing steering column for a motor vehicle |
DE19542491C1 (en) * | 1995-11-15 | 1997-02-27 | Daimler Benz Ag | Collapsible steering-column for motor vehicle |
US5605352A (en) * | 1995-12-08 | 1997-02-25 | General Motors Corporation | Energy absorbing steering column |
US5961146A (en) * | 1996-01-18 | 1999-10-05 | Nsk Ltd. | Shock absorbing type steering column assembly |
US5706704A (en) * | 1996-03-25 | 1998-01-13 | General Motors Corporation | Energy absorbing steering column for motor vehicle |
-
1998
- 1998-05-02 DE DE19819713A patent/DE19819713C2/en not_active Expired - Fee Related
-
1999
- 1999-04-29 SE SE9901546A patent/SE521506C2/en not_active IP Right Cessation
- 1999-05-03 US US09/303,434 patent/US6349610B2/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050006891A1 (en) * | 2003-05-15 | 2005-01-13 | Hideaki Okamoto | Steering column supporting apparatus |
US7810408B2 (en) * | 2003-05-15 | 2010-10-12 | Mitsubishi Jidosha Kogyo K.K. | Energy absorbing mechanism of steering column supporting apparatus |
US20060001249A1 (en) * | 2003-12-04 | 2006-01-05 | Nacam France Sas, A Corporation Of France | Energy absorption device for steering column |
US7644951B2 (en) * | 2003-12-04 | 2010-01-12 | Necam France SAS | Energy absorption device for steering column |
US20060290129A1 (en) * | 2005-05-26 | 2006-12-28 | Aisin Seiki Kabushiki Kaisha | Shock-absorption steering device |
US7490855B2 (en) * | 2005-05-26 | 2009-02-17 | Aisin Seiki Kabushiki Kaisha | Shock-absorption steering device |
WO2018210874A1 (en) * | 2017-05-18 | 2018-11-22 | Trw Automotive Gmbh | Steering column assembly |
CN110621566A (en) * | 2017-05-18 | 2019-12-27 | Trw汽车股份有限公司 | Steering column assembly |
US11260896B2 (en) | 2017-05-18 | 2022-03-01 | Zf Automotive Germany Gmbh | Steering column assembly |
US11807293B2 (en) | 2019-03-12 | 2023-11-07 | Thyssenkrupp Presta Ag | Adjustment drive for a steering column, and steering column for a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
SE9901546L (en) | 1999-11-03 |
DE19819713C2 (en) | 2001-05-10 |
SE9901546D0 (en) | 1999-04-29 |
US6349610B2 (en) | 2002-02-26 |
SE521506C2 (en) | 2003-11-04 |
DE19819713A1 (en) | 1999-11-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DAIMLERCHRYSLER AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GLINOWIECKI, JOERG;KAMBIES, THOMAS;WEHMEYER, ANDREAS;REEL/FRAME:010004/0226;SIGNING DATES FROM 19990505 TO 19990507 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20060226 |