WO2003039939A1 - Längsträger als teil einer tragstruktur eines fahrzeuges - Google Patents
Längsträger als teil einer tragstruktur eines fahrzeuges Download PDFInfo
- Publication number
- WO2003039939A1 WO2003039939A1 PCT/EP2002/011821 EP0211821W WO03039939A1 WO 2003039939 A1 WO2003039939 A1 WO 2003039939A1 EP 0211821 W EP0211821 W EP 0211821W WO 03039939 A1 WO03039939 A1 WO 03039939A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- side member
- hollow profiles
- longitudinal girder
- longitudinal
- height
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/12—Understructures, i.e. chassis frame on which a vehicle body may be mounted assembled from readily detachable parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/008—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of light alloys, e.g. extruded
Definitions
- the invention relates to a longitudinal member as part of a supporting structure of a vehicle, the width / height ratio of which is a 0 / b 0 ⁇ 1 and which is formed by at least two hollow profiles which run essentially parallel to one another.
- the known measure seems to be the side member profile made of a high-strength steel material to manufacture and reduce the sheet thickness accordingly, first of all as a possible solution.
- Bending collapse is understood to mean the failure of the side member by buckling.
- the force F transmitted in the event of a crash could also be achieved by reducing the circumference U of the side member profile, namely by shortening its edges, but such a solution is out of the question, since this would result in an excessive reduction in the rigidity of the side member, which would lead to leads to a reduction in the load-bearing function.
- a reduction in the edge lengths a 0 and b 0 also increases the risk of bending collapse since the profile becomes narrower. For the reasons given above, it is therefore not possible to achieve any noteworthy weight savings on the side member by reducing the edge length of the profile and / or the sheet metal thickness, taking into account the force transmitted to the passenger compartment at a level that is bearable for the occupants.
- a first stability criterion designated with the term "folding compatibility" states that when the side member is deformed as a result of a crash, the long sides b 0 of the profile must be able to unfold unhindered because only then can the greatest possible amount of energy be absorbed and converted into deformation energy.
- edge length ratio a 0 / b 0 must not fall below a lower limit.
- a second stability criterion is that of the so-called "compactness”.
- a stable and regular folding process due to crash deformation depends on the ratio of the sheet thickness t to the long side b 0 of the side member profile. This ratio t / b 0 must therefore not drop below a certain critical value, the question as to where this critical value lies depends, among other things, on the material and the quality of the side member.
- the invention has for its object to provide a longitudinal member for vehicles in lightweight construction, which has the following properties:
- the side member has a lower weight than
- the side member has a stiffness, in particular bending stiffness, which is at least as great as that of the side member according to the conventional construction principle.
- the side member has a greater energy absorption capacity in the event of a crash than the side members according to the conventional design principle.
- the side member does not take up more space than the side member according to the conventional construction principle.
- Longitudinal beam according to the conventional construction principle is understood to mean a longitudinal beam which consists of a closed profile which has a height b 0 which is significantly greater than its width a 0 , generally by a factor of 2-3.
- the closed profile can consist of two profile halves connected to each other on joining flanges (so-called shell construction), but it can also be a closed profile without a flange.
- the geometric condition "height b 0 greater than width a 0 " is characteristic in any case.
- the reason that conventional side members have this geometry is the high flexural rigidity which such a profile has about an axis perpendicular to its longitudinal axis.
- the above object is achieved according to the invention with a longitudinal beam of the type mentioned, in which the hollow profiles each have a width / height ratio a 1 # 2 / b lj2 «1 and are arranged at a distance from each other to form a free space and are connected to each other in a dimensionally stable manner at both ends.
- the total height of the side member should be much greater than the height of each hollow profile.
- the longitudinal beam according to the invention has at least the same bending stiffness with the same external dimensions as a longitudinal beam according to the conventional design principle, so that it can fully fulfill the supporting function. However, it also fulfills the stability criteria "folding compatibility" and “compactness” in that each individual profile fulfills these criteria. Due to the dimensioning, all individual profiles can unfold unhindered in the event of a crash. This ensures maximum energy consumption in the event of a crash. The new geometric design and dimensions of the side member alone result in a weight saving potential of 20%.
- the dimensionally stable connection between the hollow profiles is provided on the front and / or laterally attached plates and / or sheets. Other adjacent components can also form the dimensionally stable connection.
- Fig. 1 shows a side member of a support structure
- FIG. 2 shows two side members connected to a passenger compartment according to FIG. 1 as part of a support structure of a vehicle in a space frame construction in a perspective view with different associated cross sections,
- FIG. 3 shows two side members connected to a passenger compartment according to FIG. 1 as part of a support structure of a vehicle in a space frame design in a perspective view in a different embodiment from FIG. 2 with different associated cross sections and
- Fig. 4 is a comparison of a side member according to the invention and a side member according to the conventional design principle in a schematic representation and in cross section.
- the longitudinal beam 1, 2, 3, 4 according to the invention is part of a support structure T of a vehicle in a space frame design, of which parts of the passenger compartment are also shown in FIGS. 2 and 3.
- Each longitudinal member 1, 2, 3, 4 consists of two spaced-apart, parallel mutually extending hollow profiles la, lb, 2a, 2b, 3a, 3b, 4a, 4b made of sheet steel. Both hollow profiles la, lb, 2a, 2b, 3a, 3b, 4a, 4b are rigidly connected to one another at their ends, so that they form a functional unit.
- these rigid connections are shown schematically as connecting parts lc, ld. They can be designed in various ways, in particular they can be front or side plates / sheets.
- the subsequent support structure T can also be included in the dimensionally stable connections, as shown in FIGS. 2 and 3. All conventional techniques can be considered as connection techniques, for example a welded or soldered connection, a screw connection, an adhesive connection or a riveted connection. It is crucial that such connections connect the hollow profiles 2, 3 to one another in a dimensionally stable manner.
- the front ends of the hollow profiles 1 a, 1 b, 2 a, 2 b, 3 a, 3 b, 4 a, 4 b shown in the two exemplary embodiments in FIGS. 2 and 3 are connected via end plates / sheets 5, 6, 7, 8. While in the embodiment of FIG. 2 the rear ends are integrally connected on the one hand overlapping to hollow profiles of the support structure T of the passenger compartment, in particular via soldered connections, on the other hand they are connected to one another in a dimensionally stable manner via lateral plates / sheets 9a, 9b, 10a, 10b. In the embodiment of FIG. 3, the rear ends are overlapped with the rigid hollow profile of the support structure T of the passenger compartment and are also connected to one another in a dimensionally stable manner. In Fig.
- a longitudinal beam formed by a single hollow profile according to the conventional construction principle is compared to a longitudinal beam according to the invention, which consists of two spaced hollow profiles la, lb forming a functional structural unit.
- the conventional longitudinal member is produced in a shell construction, ie its two shells 11, 12 are connected to one another via flanges 11a, 11b, 12a, 12b.
- b x «b 2 and d 0.5 b to 1.0 b 1 .
- a 0 / b 0 ⁇ 1 applies in particular a 0 / b 0 ⁇ 1, whereby “ ⁇ ” is understood to mean a factor of at least “2” as a rule between “2” and “3” , At the end of the description, there are two comparisons for these dimensions for specific dimensions.
- the wall thickness of the individual profiles was reduced by approximately 25.93% from 1.35 mm to 1.00 mm compared to the conventional side member.
- ⁇ ra depends on the material (high-strength steels have significantly higher ⁇ ra values than conventional longitudinal beam steels), on the other hand ⁇ m also depends on the geometry of the longitudinal beam or the individual profiles. It should be pointed out that the invention lies exclusively in the geometric design of the new side member. However, more extensive weight savings can be achieved by selecting the strength of the material, as explained in Example 1 above. However, significant weight savings can also be achieved if the same material as in the prior art is selected. Reference is made to example 2.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/492,883 US20050012362A1 (en) | 2001-11-07 | 2002-10-23 | Longitudinal girder as part of a load bearing structure of a motor vehicle |
EP02791650A EP1441941A1 (de) | 2001-11-07 | 2002-10-23 | Längsträger als teil einer tragstruktur eines fahrzeuges |
BR0213938-3A BR0213938A (pt) | 2001-11-07 | 2002-10-23 | Longarina como parte de uma estrutura de suporte de um veìculo |
JP2003542001A JP2005507827A (ja) | 2001-11-07 | 2002-10-23 | モータービークルの支持構造の一部としての縦通材 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10154215.1 | 2001-11-07 | ||
DE10154215A DE10154215B4 (de) | 2001-11-07 | 2001-11-07 | Längsträger als Teil einer Tragstruktur eines Fahrzeuges |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003039939A1 true WO2003039939A1 (de) | 2003-05-15 |
Family
ID=7704634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/011821 WO2003039939A1 (de) | 2001-11-07 | 2002-10-23 | Längsträger als teil einer tragstruktur eines fahrzeuges |
Country Status (7)
Country | Link |
---|---|
US (1) | US20050012362A1 (de) |
EP (1) | EP1441941A1 (de) |
JP (1) | JP2005507827A (de) |
CN (1) | CN1578742A (de) |
BR (1) | BR0213938A (de) |
DE (1) | DE10154215B4 (de) |
WO (1) | WO2003039939A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005080180A1 (es) * | 2004-02-19 | 2005-09-01 | Metalsa Servicios S. De R.L. | Chasis automotriz |
WO2020058038A1 (de) * | 2018-09-18 | 2020-03-26 | Hörmann Automotive GmbH | Längsträger für ein strassenfahrzeug |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7243986B2 (en) * | 2004-10-19 | 2007-07-17 | Ford Global Technologies, Llc | Spot-welded joint for hydroformed members |
DE102005062330B4 (de) * | 2005-12-24 | 2019-01-10 | Volkswagen Ag | Hilfsrahmen für Kraftfahrzeuge |
US7441819B2 (en) * | 2006-09-26 | 2008-10-28 | Ford Global Technologies, Llc | Tubular structural joint for automotive front end |
CN101195385B (zh) * | 2006-12-05 | 2012-10-03 | 福特全球技术公司 | 液压成形车架的后副车架配件安装件 |
US8002337B2 (en) * | 2009-04-23 | 2011-08-23 | Ford Global Technologies, Llc | Vehicle frame with offset load path to a hinge pillar and rocker |
DE102009021964A1 (de) * | 2009-05-19 | 2010-11-25 | Audi Ag | Hohlprofil für eine Fahrzeugkarosserie |
JP4519195B1 (ja) * | 2009-09-25 | 2010-08-04 | 有限会社ベーシック | パワープラントマウント用の汎用フレーム構造。 |
WO2012030753A2 (en) * | 2010-08-30 | 2012-03-08 | Magna International Inc. | Frame rail for a vehicle |
DE102017102554A1 (de) | 2017-02-09 | 2018-08-09 | CG Rail - Chinesisch-Deutsches Forschungs- und Entwicklungszentrum für Bahn- und Verkehrstechnik Dresden GmbH | Unterer Längsträger als Teil einer Tragstruktur eines Wagenkastens für ein Schienenfahrzeug zur Personenbeförderung |
DE102017102563A1 (de) | 2017-02-09 | 2018-08-09 | CG Rail - Chinesisch-Deutsches Forschungs- und Entwicklungszentrum für Bahn- und Verkehrstechnik Dresden GmbH | Oberer Längsträger als Teil einer Tragstruktur eines Wagenkastens für ein Schienenfahrzeug zur Personenbeförderung |
JP2024054026A (ja) * | 2022-10-04 | 2024-04-16 | 株式会社Subaru | 車体前部構造 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0303431A1 (de) * | 1987-08-11 | 1989-02-15 | Showa Aluminum Kabushiki Kaisha | Verfahren zur Herstellung eines Chassis für Fahrzeuge |
DE3912484A1 (de) * | 1989-04-15 | 1990-10-18 | Wiens Karl Heinrich | Bootsanhaenger |
US4986597A (en) | 1988-09-09 | 1991-01-22 | Norsk Hydro A.S. | Vehicle space frame and a method for manufacturing of vehicle space frame parts |
EP0494116A2 (de) * | 1991-01-04 | 1992-07-08 | Ford Motor Company Limited | Längsträgerrahmen für Kraftfahrzeuge |
US6029353A (en) * | 1997-06-05 | 2000-02-29 | Anodizing, Inc. | Method and products produced from splitting multi-void hollow tubing |
US6203098B1 (en) * | 1998-08-17 | 2001-03-20 | Honda Giken Kogyo Kabushiki Kaisha | Automotive vehicle body structure demonstrating a controlled reaction load |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE607577C (de) * | 1928-02-28 | 1935-01-02 | Ludwig Baersch Dipl Ing | Fahrgestell fuer Kraftwagen |
DE19931741B4 (de) * | 1999-07-08 | 2004-11-25 | Daimlerchrysler Ag | Kraftfahrzeugaufbau |
-
2001
- 2001-11-07 DE DE10154215A patent/DE10154215B4/de not_active Expired - Fee Related
-
2002
- 2002-10-23 WO PCT/EP2002/011821 patent/WO2003039939A1/de not_active Application Discontinuation
- 2002-10-23 US US10/492,883 patent/US20050012362A1/en not_active Abandoned
- 2002-10-23 JP JP2003542001A patent/JP2005507827A/ja active Pending
- 2002-10-23 EP EP02791650A patent/EP1441941A1/de not_active Withdrawn
- 2002-10-23 BR BR0213938-3A patent/BR0213938A/pt not_active Application Discontinuation
- 2002-10-23 CN CNA028215850A patent/CN1578742A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0303431A1 (de) * | 1987-08-11 | 1989-02-15 | Showa Aluminum Kabushiki Kaisha | Verfahren zur Herstellung eines Chassis für Fahrzeuge |
US4986597A (en) | 1988-09-09 | 1991-01-22 | Norsk Hydro A.S. | Vehicle space frame and a method for manufacturing of vehicle space frame parts |
DE3912484A1 (de) * | 1989-04-15 | 1990-10-18 | Wiens Karl Heinrich | Bootsanhaenger |
EP0494116A2 (de) * | 1991-01-04 | 1992-07-08 | Ford Motor Company Limited | Längsträgerrahmen für Kraftfahrzeuge |
US6029353A (en) * | 1997-06-05 | 2000-02-29 | Anodizing, Inc. | Method and products produced from splitting multi-void hollow tubing |
US6203098B1 (en) * | 1998-08-17 | 2001-03-20 | Honda Giken Kogyo Kabushiki Kaisha | Automotive vehicle body structure demonstrating a controlled reaction load |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005080180A1 (es) * | 2004-02-19 | 2005-09-01 | Metalsa Servicios S. De R.L. | Chasis automotriz |
WO2020058038A1 (de) * | 2018-09-18 | 2020-03-26 | Hörmann Automotive GmbH | Längsträger für ein strassenfahrzeug |
Also Published As
Publication number | Publication date |
---|---|
JP2005507827A (ja) | 2005-03-24 |
US20050012362A1 (en) | 2005-01-20 |
DE10154215B4 (de) | 2006-04-13 |
BR0213938A (pt) | 2004-08-31 |
CN1578742A (zh) | 2005-02-09 |
EP1441941A1 (de) | 2004-08-04 |
DE10154215A1 (de) | 2003-05-15 |
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