WO1990009296A1 - Steering arrangement for motor vehicles - Google Patents
Steering arrangement for motor vehicles Download PDFInfo
- Publication number
- WO1990009296A1 WO1990009296A1 PCT/SE1990/000091 SE9000091W WO9009296A1 WO 1990009296 A1 WO1990009296 A1 WO 1990009296A1 SE 9000091 W SE9000091 W SE 9000091W WO 9009296 A1 WO9009296 A1 WO 9009296A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steering wheel
- steering
- air bag
- shaft
- bag device
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 claims 4
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 230000000295 complement effect Effects 0.000 abstract description 3
- 239000006096 absorbing agent Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
-
- 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
- B62D1/192—Yieldable or collapsible columns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
- B60R2021/2173—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together the module or part thereof being movably mounted on the vehicle
Definitions
- the present invention relates to a steering arrangement for motor vehicles, comprising a steering shaft, a bearing housing fixed to the vehicle, in which housing the steer ⁇ ing shaft is rotatably mounted, and a steering wheel joined to the steering shaft, consisting of a steering wheel rim, a steering wheel hub, elements joining the steering wheel rim to the steering wheel hub, and a gas * generator equipped air bag device attached to the steering wheel.
- Gas cushion devices or air bags as they are commonly known, have come into use to a certain extent as a complement to the passive safety system in motor vehicles.
- Engineering developments in this area were initially directed to entire systems of gas balloons or bags placed in front of the vehicle occupants and mounted in the dashboard or in the steering wheel. Later design develop ⁇ ment has, however, lately been concentrated to the latter type, i.e. air bag units in the steering wheel.
- a sheet metal bowl or box mounted inside the steering wheel rim and containing, in addition to a perforated folded bag, a gas generator.
- the bowl is open towards the driver and is covered by a padded cover which is opened when the unit is triggered.
- the unit has been a complement to the rest of the vehicle safety equipment, such as seat belts, padding or upholstery on other com ⁇ ponents, etc. it has also served as an alternative to previously known passive safety devices in the steering arrangement in the form of specially designed steering wheel spokes, steering shafts and joints, providing together an intentional controlled collapse of the steer ⁇ ing system with accompanying controlled energy absorption upon collision.
- the SRS unit air bag In a collision, the SRS unit air bag is rapidly inflated, and is thereafter emptied of gas during energy absorption when it is compressed by the occupant's weight and the gas in the bag is pressed out through perforations in the bag.
- the driver may, despite the presence of the air bag, at the end of the course of the collision, strike the steering wheel, and depending on the driver's remaining kinetic energy, the steering wheel rim and the SRS unit can cause injury.
- the purpose of the present invention is to achieve a steering arrangement of the type described by way of introduction, which will make it possible to reduce in- juries occurring during a collision, where the energy absorbing bag is not able to absorb sufficient energy to prevent impact against the steering wheel.
- the design according to the invention does not mean that the air bag device is used as an alternative to passive safety arrangements known per se in a steering arrange ⁇ ment, but it is instead incorporated into a chain of components in the steering arrangement, the design and calculated dimensions of which provide a controlled course of deformation in several stages.
- Figure 2 shows a longitudinal section through a schema- tically represented steering arrangement comprising the steering wheel in Figure 1, and
- Figure 3 is a view of the steering arrangement in Figure 2 in a deformed state after driver impact.
- the steering wheel 1 shown in the Figures has a steering wheel rim 2, consisting of a steel ring 4 sheathed in a covered foamed plastic jacket 3.
- the ring 4 is joined via spokes 5 to a steering wheel centre in the form of a hub 6, which is mounted on a steering shaft 7.
- the spoke-s 5 are dimensioned in a known manner and are designed to be deformed upon a certain loading of the steering wheel rim 2 and comprise for this purpose flat metal bars 8 which are pre-bent at 9 to be able to collapse when loaded.
- the spokes 5, as is the rim 2 are sheathed in the covered ' foamed plastic jacket 3.
- An air bag device which can be of a type known per se, known as the SRS unit, is mounted centrally in the steering wheel.
- the unit 10 is joined to the hub 6 via four essentially Z-shaped flat metal bars
- the steering wheel shaft 7 has a tubular upper portion 7a with internal splines and a lower portion 7b with external splines which are inserted into the upper portion 7a.
- the portions 7a and 7b are thus axially displaceable but non rotatably joined to each other.
- the steering shaft 7 is mounted in an upper and a lower bearing 20 and 21, res- pectively, in a tubular bearing housing 22 which has at 23 and 24 schematically indicated mountings in the vehicle.
- the bearing housing 22 is made of metal and has a corru ⁇ gated portion 25 intended to provide controlled com ⁇ pression of the tube when loaded by driver impact during a collision.
- the upper mounting 23 is designed to withstand less impact than the lower mounting 24. At a certain pre ⁇ determined loading of the steering wheel, the mounting 23 is broken off and the steering wheel can then be displaced forward as the corrugated portion 25 is compressed and shaft portion 7b is forced into portion 7a.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Steering Controls (AREA)
- Air Bags (AREA)
Abstract
Steering wheel arrangement for motor vehicles, comprising a steering wheel (1) with an air bag device (10). The steering wheel has a two-part steering shaft (7), which is mounted in a tubular bearing housing (22) with a corrugated deformation zone (25). The bearing housing has upper and lower mountings in the vehicle (23, 24), of which the upper mounting is designed less robustly than the lower mounting. Upon steering wheel impact of a certain force, the upper mounting breaks off and the tube can then be compressed for energy absorption. The tube serves as an energy absorber in order to complement the energy absorption of the air bag if necessary.
Description
Steering arrangement for motor vehicles
The present invention relates to a steering arrangement for motor vehicles, comprising a steering shaft, a bearing housing fixed to the vehicle, in which housing the steer¬ ing shaft is rotatably mounted, and a steering wheel joined to the steering shaft, consisting of a steering wheel rim, a steering wheel hub, elements joining the steering wheel rim to the steering wheel hub, and a gas * generator equipped air bag device attached to the steering wheel.
Gas cushion devices or air bags, as they are commonly known, have come into use to a certain extent as a complement to the passive safety system in motor vehicles. Engineering developments in this area were initially directed to entire systems of gas balloons or bags placed in front of the vehicle occupants and mounted in the dashboard or in the steering wheel. Later design develop¬ ment has, however, lately been concentrated to the latter type, i.e. air bag units in the steering wheel.
One such commercially available unit, the so-called "SRS
(Supplementary Restraint System) unit", consists of a sheet metal bowl or box mounted inside the steering wheel rim and containing, in addition to a perforated folded bag, a gas generator. The bowl is open towards the driver and is covered by a padded cover which is opened when the unit is triggered.
In SRS installations known up to now, the unit has been a complement to the rest of the vehicle safety equipment, such as seat belts, padding or upholstery on other com¬ ponents, etc. it has also served as an alternative to previously known passive safety devices in the steering
arrangement in the form of specially designed steering wheel spokes, steering shafts and joints, providing together an intentional controlled collapse of the steer¬ ing system with accompanying controlled energy absorption upon collision.
In a collision, the SRS unit air bag is rapidly inflated, and is thereafter emptied of gas during energy absorption when it is compressed by the occupant's weight and the gas in the bag is pressed out through perforations in the bag. At high collision speeds, the driver may, despite the presence of the air bag, at the end of the course of the collision, strike the steering wheel, and depending on the driver's remaining kinetic energy, the steering wheel rim and the SRS unit can cause injury.
The purpose of the present invention is to achieve a steering arrangement of the type described by way of introduction, which will make it possible to reduce in- juries occurring during a collision, where the energy absorbing bag is not able to absorb sufficient energy to prevent impact against the steering wheel.
This is achieved according to the invention by virtue of the fact that the steering shaft has two mutually non-
-rotatably but axially displaceably connected shaft parts and the bearing means are constructed and fixed so that the length of the steering shaft can be shortened to permit forward displacemenet of the steering wheel at a predetermined loading of the steering wheel and/or the air bag device.
The design according to the invention does not mean that the air bag device is used as an alternative to passive safety arrangements known per se in a steering arrange¬ ment, but it is instead incorporated into a chain of
components in the steering arrangement, the design and calculated dimensions of which provide a controlled course of deformation in several stages.
The invention will be described in more detail with refer¬ ence to examples shown in the accompanying drawings, where Figure 1 shows a perspective X-ray view of a schematically represented vehicle steering wheel.
Figure 2 shows a longitudinal section through a schema- tically represented steering arrangement comprising the steering wheel in Figure 1, and
Figure 3 is a view of the steering arrangement in Figure 2 in a deformed state after driver impact.
The steering wheel 1 shown in the Figures has a steering wheel rim 2, consisting of a steel ring 4 sheathed in a covered foamed plastic jacket 3. The ring 4 is joined via spokes 5 to a steering wheel centre in the form of a hub 6, which is mounted on a steering shaft 7. The spoke-s 5 are dimensioned in a known manner and are designed to be deformed upon a certain loading of the steering wheel rim 2 and comprise for this purpose flat metal bars 8 which are pre-bent at 9 to be able to collapse when loaded.'" The spokes 5, as is the rim 2, are sheathed in the covered ' foamed plastic jacket 3.
An air bag device, generally designated 10, which can be of a type known per se, known as the SRS unit, is mounted centrally in the steering wheel. The unit 10 is joined to the hub 6 via four essentially Z-shaped flat metal bars
11, which are joined to each other in pairs by means of a pair of metal strips 12 which in turn form the mounting means for the unit 10.
The steering wheel shaft 7 has a tubular upper portion 7a with internal splines and a lower portion 7b with external
splines which are inserted into the upper portion 7a. The portions 7a and 7b are thus axially displaceable but non rotatably joined to each other. The steering shaft 7 is mounted in an upper and a lower bearing 20 and 21, res- pectively, in a tubular bearing housing 22 which has at 23 and 24 schematically indicated mountings in the vehicle. The bearing housing 22 is made of metal and has a corru¬ gated portion 25 intended to provide controlled com¬ pression of the tube when loaded by driver impact during a collision. The upper mounting 23 is designed to withstand less impact than the lower mounting 24. At a certain pre¬ determined loading of the steering wheel, the mounting 23 is broken off and the steering wheel can then be displaced forward as the corrugated portion 25 is compressed and shaft portion 7b is forced into portion 7a.
During a collosion, which triggers the air bag device, the driver is first caught by the air bag. If the collosion is so powerful that the driver, despite the air bag, finally strikes the steering wheel with significant force, energy absorption is provided in a second stage when the flat bars 8 and 11 are deformed as the steering rim 2 and the air bag device 10 are loaded. Energy absorption in a third stage is obtained when the upper tube mounting 23 is broken off and the tube 22 is compressed as shown in Figure 3.
Claims
1. Steering arrangement for motor vehicles, comprising a steering shaft, a bearing housing fixed to the vehicle, in which housing the steering shaft is rotatably mounted, and a steering wheel joined to the steering shaft, said steer- ing wheel consisting of a steering wheel rim, a steering wheel hub, elements joining the steering wheel rim to the steering wheel hub and a gas generator eguipped air bag device attached to the steering wheel, characterized in that the steering shaft (7) has two mutually non-rotatably but axially displaceably connected shaft parts (7a, 7b), and that the bearing means (22) are constructed and fixed so that the length of the steering shaft can be shortened to permit forward displacement of the steering wheel (1) at a predetermined loading of the steering wheel and/or air bag device (10).
2. Steering arrangement according to Claim l, character¬ ized in that the bearing means comprise a bearing housing (22) with at least one bearing (20) for the steering wheel shaft, and that the bearing housing is joined to the ve¬ hicle at its end proximate the steering wheel in such a way that upon a predetermined loading of the steering wheel (l) and/or the air bag device (10), the joint is broken off to permit displacement of said bearing (20) with associated shaft portion (7a) towards the other shaft portion (7b) .
3. Steering arrangement according to Claim 2, character¬ ized in that the bearing housing is a corrugated pipe (22)
- over at least a portion (25) of its length, said pipe, being mounted in the vehicle on either side of the corru¬ gated portion so that upon loading of the steering wheel and/or the air bag device, the mounting (23) closest to the steering wheel breaks off prior to the other mounting (24) to permit compression of the pipe in the corrugated portion (25) .
4. Steering arrangement according to one of Claims 1-3, characterized in that the air bag device (10) is joined to the steering wheel hub (6) via a carrier (11) extending from the hub and so shaped that it can be depressed upon a certain compressive load on the air bag device to permit displacement of the air bag device towards the hub.
5. Steering arrangement according to one of Claims 1-4, characterized in that the elements joining the steering wheel hub (6) to the steering wheel rim (2) form spokes (8) separate from the air bag carrier (11), which spokes, upon a certain loading of the steering wheel rim, can be deformed to permit displacement of the rim relative to the hub independently of the air bag device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8900500A SE463553B (en) | 1989-02-14 | 1989-02-14 | STEERING DIRECTION FOR MOTOR VEHICLE |
| SE8900500-3 | 1989-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1990009296A1 true WO1990009296A1 (en) | 1990-08-23 |
Family
ID=20375042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE1990/000091 WO1990009296A1 (en) | 1989-02-14 | 1990-02-13 | Steering arrangement for motor vehicles |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE463553B (en) |
| WO (1) | WO1990009296A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2730971A1 (en) * | 1995-02-24 | 1996-08-30 | Daumal Castellon Melchor | Vehicle steering wheel mounting |
| GB2353768A (en) * | 1999-08-28 | 2001-03-07 | Rover Group | Collapsible vehicle steering column |
| WO2008053664A1 (en) | 2006-10-31 | 2008-05-08 | Toyota Jidosha Kabushiki Kaisha | Knee air bag with column |
| US20110260438A1 (en) * | 2010-04-23 | 2011-10-27 | Burckhard Becker | Length adjustable steering column module for a motor vehicle |
| CN104691602A (en) * | 2013-12-04 | 2015-06-10 | 北汽福田汽车股份有限公司 | Separation type steering mechanism |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3600003A (en) * | 1969-03-19 | 1971-08-17 | Eaton Yale & Towne | Vehicle safety system |
| DE2137833A1 (en) * | 1970-07-31 | 1972-02-03 | Nissan Motor Co , Ltd , Yokohama (Japan) | Vehicle security device |
| DE2236136A1 (en) * | 1971-08-05 | 1973-02-15 | Ford Werke Ag | STEERING COLUMN FOR MOTOR VEHICLES |
| DE1630857B2 (en) * | 1966-11-24 | 1974-03-21 | Nissan Jidosha K.K., Yokohama, Kanagawa (Japan) | Safety steering column |
| SE382779B (en) * | 1972-09-25 | 1976-02-16 | Gen Motors Corp | SASOM MODULE UNIT DESIGNED PERSONNEL SYSTEM FOR MOTOR VEHICLES |
| DE2535806A1 (en) * | 1974-09-04 | 1976-03-18 | Alfa Romeo Alfasud | SAFETY STEERING WHEEL FOR MOTOR VEHICLES |
| SE403744B (en) * | 1973-12-21 | 1978-09-04 | Daimler Benz Ag | MOTOR VEHICLE SAFETY DEVICE |
| DE3527581A1 (en) * | 1985-08-01 | 1987-02-12 | Bayerische Motoren Werke Ag | Motor vehicle steering wheel |
| US4644817A (en) * | 1979-09-06 | 1987-02-24 | Daimler-Benz Aktiengesellschaft | Steering wheel for a motor vehicle |
| DE3621226C1 (en) * | 1986-06-25 | 1988-01-14 | Daimler Benz Ag | Steering wheel arrangement for vehicles |
| GB2218183A (en) * | 1988-03-29 | 1989-11-08 | Takata Corp | A mounting arrangement for a vehicle air bag |
-
1989
- 1989-02-14 SE SE8900500A patent/SE463553B/en not_active IP Right Cessation
-
1990
- 1990-02-13 WO PCT/SE1990/000091 patent/WO1990009296A1/en unknown
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1630857B2 (en) * | 1966-11-24 | 1974-03-21 | Nissan Jidosha K.K., Yokohama, Kanagawa (Japan) | Safety steering column |
| US3600003A (en) * | 1969-03-19 | 1971-08-17 | Eaton Yale & Towne | Vehicle safety system |
| DE2137833A1 (en) * | 1970-07-31 | 1972-02-03 | Nissan Motor Co , Ltd , Yokohama (Japan) | Vehicle security device |
| DE2236136A1 (en) * | 1971-08-05 | 1973-02-15 | Ford Werke Ag | STEERING COLUMN FOR MOTOR VEHICLES |
| SE382779B (en) * | 1972-09-25 | 1976-02-16 | Gen Motors Corp | SASOM MODULE UNIT DESIGNED PERSONNEL SYSTEM FOR MOTOR VEHICLES |
| SE403744B (en) * | 1973-12-21 | 1978-09-04 | Daimler Benz Ag | MOTOR VEHICLE SAFETY DEVICE |
| DE2535806A1 (en) * | 1974-09-04 | 1976-03-18 | Alfa Romeo Alfasud | SAFETY STEERING WHEEL FOR MOTOR VEHICLES |
| US4644817A (en) * | 1979-09-06 | 1987-02-24 | Daimler-Benz Aktiengesellschaft | Steering wheel for a motor vehicle |
| DE3527581A1 (en) * | 1985-08-01 | 1987-02-12 | Bayerische Motoren Werke Ag | Motor vehicle steering wheel |
| DE3621226C1 (en) * | 1986-06-25 | 1988-01-14 | Daimler Benz Ag | Steering wheel arrangement for vehicles |
| GB2218183A (en) * | 1988-03-29 | 1989-11-08 | Takata Corp | A mounting arrangement for a vehicle air bag |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2730971A1 (en) * | 1995-02-24 | 1996-08-30 | Daumal Castellon Melchor | Vehicle steering wheel mounting |
| GB2353768A (en) * | 1999-08-28 | 2001-03-07 | Rover Group | Collapsible vehicle steering column |
| WO2008053664A1 (en) | 2006-10-31 | 2008-05-08 | Toyota Jidosha Kabushiki Kaisha | Knee air bag with column |
| EP2085272A1 (en) * | 2006-10-31 | 2009-08-05 | Toyota Jidosha Kabushiki Kaisha | Knee air bag with column |
| EP2085272A4 (en) * | 2006-10-31 | 2010-03-03 | Toyota Motor Co Ltd | AIRBAG FOR KNEE WITH COLUMN |
| US8056925B2 (en) | 2006-10-31 | 2011-11-15 | Toyota Jidosha Kabushiki Kaisha | Column-mounted knee airbag device |
| AU2007315615B2 (en) * | 2006-10-31 | 2012-01-12 | Toyota Jidosha Kabushiki Kaisha | Knee air bag with column |
| US20110260438A1 (en) * | 2010-04-23 | 2011-10-27 | Burckhard Becker | Length adjustable steering column module for a motor vehicle |
| US8434788B2 (en) * | 2010-04-23 | 2013-05-07 | C. Rob. Hammerstein Gmbh & Co. Kg | Length adjustable steering column module for a motor vehicle |
| CN104691602A (en) * | 2013-12-04 | 2015-06-10 | 北汽福田汽车股份有限公司 | Separation type steering mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8900500L (en) | 1990-08-15 |
| SE8900500D0 (en) | 1989-02-14 |
| SE463553B (en) | 1990-12-10 |
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