WO2008149044A2 - Ensemble d'absorption d'énergie muni de deux dispositifs d'absorption - Google Patents
Ensemble d'absorption d'énergie muni de deux dispositifs d'absorption Download PDFInfo
- Publication number
- WO2008149044A2 WO2008149044A2 PCT/FR2008/050956 FR2008050956W WO2008149044A2 WO 2008149044 A2 WO2008149044 A2 WO 2008149044A2 FR 2008050956 W FR2008050956 W FR 2008050956W WO 2008149044 A2 WO2008149044 A2 WO 2008149044A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- deformation
- energy absorbing
- absorbing device
- assembly
- energy
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
- B60N2/427—Seats or parts thereof displaced during a crash
- B60N2/42709—Seats or parts thereof displaced during a crash involving residual deformation or fracture of the structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
- B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
- B60N2/4214—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal
Definitions
- the invention relates to an energy absorbing assembly by deformation in case of impact, in particular for a motor vehicle seat.
- the invention further relates to a seat comprising the energy absorbing assembly.
- Such an assembly is preferably disposed between the backrest and the seat. It is intended to reduce the stresses to the occupant of the vehicle sitting on the seat by gradually absorbing the kinetic energy to which his body is subjected.
- the invention is more particularly intended for the absorption of energy in the event of a rear impact, but is also applicable to an impact before or even to other types of impact.
- seats comprising a seat and a backrest, said seats being equipped with an energy absorbing device disposed between the seat and the backrest so as to absorb the forces exerted on the backrest.
- Such seats are described in particular in documents US 2004/061 364, DE 198 07 581, EP 1 547 857 and DE 199 44 635.
- the assembly comprises a first energy absorbing device and a second energy absorbing device intended to be interposed between a first element and a second element in order to maintain them. relative to one another by absorbing high stresses exerted between said first and second members, said first energy absorbing device and said second absorbing device being arranged in series and capable of being staged direction of deformation in case of stress exerted on the energy absorbing assembly.
- said first energy absorbing device has a resistance to deformation less than the resistance to deformation of the second energy absorbing device.
- the resistance to deformation is similar to a stiffness and determines the range of displacement of the seat to dampen an impact.
- a first energy absorption device of moderate stiffness in the event of a shock at a low speed, the deformation of the first energy absorption device will allow, by a relatively large amplitude of deformation, to reduce the deceleration experienced by the occupant.
- a second high stiffness energy absorbing device in the event of a high speed impact, the reduced deformation of the second energy absorbing device will reduce the risk of the occupant coming into contact with an obstacle to the energy absorption device. interior of the cockpit.
- the first energy absorbing device has a lower deformation resistance between 1.5 times and 3 times the deformation resistance of the second energy absorbing device.
- the mechanical differences thus make it possible to have at least one of the two devices that are well adapted to the type of shock undergone, while avoiding, in the event of a high speed impact, that the moderate stiffness of the first energy absorption device generates a excessive amplitude of displacement and / or a sudden variation in the deceleration.
- the first energy absorbing device preferably comprises a one-piece piece having an elongated slot separating a first portion and a second portion facing each other, said light extending transversely to the direction of deformation and having a substantially constant width.
- the effort to bring said first and second portions into contact with each other by deformation is preferably less than the force required to plastically deform the second energy absorbing device.
- the second energy absorbing device preferably comprises a plate having a succession of cuts succeeding one another in the direction of deformation and defining between them at least one bridge extending in one direction. of elongation transverse to the direction of deformation.
- the first energy absorbing device is preferably disposed inside one of the cutouts.
- the first energy absorbing device can thus move in the direction of deformation while being easily maintained in the other directions.
- the invention further relates to a seat comprising, in addition to the aforementioned energy absorbing assembly, a first element and a second element, said absorption assembly being interposed between the first element and the second element, and the first device absorption being removable.
- FIG. 1 represents a seat according to the invention, before impact
- FIG. 2 represents, on an enlarged scale, in perspective, the area marked II in FIG. 1;
- FIG. 3 represents zone II, on an enlarged scale, in section without the head of the screw;
- FIG. 4 is a representation according to FIG. 3, during a low speed shock
- FIG. 5 is a representation according to FIG. 3, after a low speed shock
- FIG. 6 is a representation according to Figure 3 after a high speed shock.
- FIG. 1 illustrates a seat 10 of a motor vehicle essentially comprising a structure seat 24, a fastening screw 6 integral with the seat structure 24, an adapter 8, a backrest structure 26, a rotary articulation device 30 and an energy absorbing assembly 1.
- the device 30 is interposed between the adapter 8 and the backrest structure 26. It adjusts the inclination of the backrest structure 26 relative to the seat structure 24.
- the rotary articulation device 30 will not be detailed further.
- the energy absorbing assembly 1 comprises a first energy absorbing device 2 and a second energy absorbing device 4 interposed between the seat structure 24 and the adapter 8. absorbing the energy of the occupant of the seat 10 in the event of shock, allowing a controlled rotation of the backrest structure 26 relative to the seat structure 24 by deformation.
- the second energy absorbing device 4 is integrated in the adapter 8.
- the adapter 8 is held on the seat structure 24 by means of a pivot 28 and the screw of fastening 6 screwed into the seat structure 24.
- the adapter 8 is constituted by a shaped plate of substantially constant thickness, preferably of the order of 2 to 3 millimeters.
- the second energy absorbing device 4 is located in an extreme portion of the adapter remote from the pivot 28. As shown more precisely in FIG. 3, it has a succession of cuts 20a, 20b, 20c, in the illustrated example three cuts, succeeding in a direction of deformation X substantially rectilinear.
- the direction of deformation X extends substantially circumferentially with respect to the pivot 28, with a slight deviation due to a planned overall deformation of the adapter 8.
- the cutouts 20a, 20b, 20c define between them bridges 22a, 22b, two in number in the illustrated embodiment.
- the bridges 22a, 22b extend in an elongation direction Y and have in the direction of deformation X a width which is substantially constant over their entire length, with however a restriction at their ends.
- the first energy absorbing device 2 is substantially in the form of a one-piece piece having a symmetry with respect to a median plane perpendicular to the elongation direction Y. It is disposed in the end cutout 20a, in which it is held in the deformation direction X between the screw shank 6 and the bridge 20a, in the elongation direction Y by the edges of the cutout 20a and perpendicular to the deformation direction X and to the elongation direction Y between the seat structure 24 and the head of the screw 6, as shown in Figure 2.
- the first energy absorbing device 2 has substantially a disc shape having cutouts therethrough and defining a housing receiving the screw 6 and an elongate slot 12 extending opposite and in the vicinity of the bridge 22a.
- the lumen 12 extends substantially in the direction of elongation Y. It is entirely included inside the first energy absorbing device 2, so that it delimits a main portion 14 and a deformation portion 16 connected to each other by two strips of material.
- the deformation portion 16 has a substantially constant width, so that the light 12 is slightly arched.
- the first absorption device of energy 2 and the second energy absorbing device 4 are distinct from one another and arranged in series, one behind the other in the direction of deformation X. As illustrated in FIG. they are solicited staged in case of shock. As long as the deformation portion 16 of the first energy absorbing device 2 is distant from the main portion 14, the first energy absorbing device 2 has a moderate resistance to deformation, while the second deformation device 16 energy absorption 4 has a relatively high resistance to deformation.
- the first energy absorbing device 2 and the second energy absorbing device 4 then contribute to absorbing the energy of the shock.
- the deformation portion 16 of the first energy absorbing device 2 is distant from the main portion 14, the deformation resistance of the first energy absorbing device 2 is sufficiently low for the second energy absorbing device 4 is deformed elastically.
- the first energy absorbing device 2 is plastically deformed, the light 12 remaining permanently crushed, but the second energy absorbing device 2 energy 4 is intact, the bridge 22a having resumed its initial shape by springback.
- the first used energy absorption device 2 is removed and replaced by a new device in the cut 20a, so we give the seat 1 its initial level of security.
- the first energy absorbing device 2 then deforms substantially more, so that the resistance to deformation of the assembly 1 is then substantially that of the second energy absorbing device 4.
- the bridge 22a then possibly the bridge 22b according to the importance of the shock, is deformed plastically, possibly until breaking.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
- Vibration Dampers (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112008001976.2T DE112008001976B4 (de) | 2007-06-05 | 2008-05-30 | Einheit zum Absorbieren von Energie mit zwei Absorptionsvorrichtungen |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0704001A FR2917025B1 (fr) | 2007-06-05 | 2007-06-05 | Ensemble d'absorption d'energie muni de deux dispositifs d'absorption |
| FR0704001 | 2007-06-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008149044A2 true WO2008149044A2 (fr) | 2008-12-11 |
| WO2008149044A3 WO2008149044A3 (fr) | 2009-03-12 |
Family
ID=38949741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2008/050956 Ceased WO2008149044A2 (fr) | 2007-06-05 | 2008-05-30 | Ensemble d'absorption d'énergie muni de deux dispositifs d'absorption |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE112008001976B4 (fr) |
| FR (1) | FR2917025B1 (fr) |
| WO (1) | WO2008149044A2 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10315541B2 (en) | 2014-09-02 | 2019-06-11 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Deformation element for a motor vehicle seat |
| US20190184866A1 (en) * | 2017-12-15 | 2019-06-20 | Honda Motor Co., Ltd. | Seat device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3333012B1 (fr) * | 2015-08-04 | 2021-04-14 | TS Tech Co., Ltd. | Cadre de siège pour véhicule |
| FR3102418A1 (fr) * | 2019-10-25 | 2021-04-30 | Renault S.A.S | Armature de siège d’un véhicule automobile et siège de véhicule associé |
| DE202022105717U1 (de) | 2022-10-11 | 2022-10-26 | Faurecia Autositze Gmbh | Fahrzeugsitzversteller-Zahnstange und Fahrzeugsitz |
| WO2024175402A1 (fr) * | 2023-02-20 | 2024-08-29 | Renault S.A.S. | Armature de siege basculante |
| FR3145903B1 (fr) * | 2023-02-20 | 2025-01-17 | Renault Sas | Armature de siège basculante |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE515871C2 (sv) * | 1997-03-07 | 2001-10-22 | Saab Automobile | Förfarande för upptagande av energi i ett fordonssäte, energiupptagande anordning för fordonssäte samt rygglutningsbeslag |
| DE19944635A1 (de) * | 1999-09-17 | 2001-03-22 | Hammerstein Gmbh C Rob | Kraftfahrzeugsitz mit einer Bolzenverbindung zwischen zwei Teilen |
| US6709053B1 (en) * | 2002-09-30 | 2004-03-23 | Lear Corporation | Vehicle seat assembly with energy managing member |
| JP2005186670A (ja) * | 2003-12-24 | 2005-07-14 | Delta Kogyo Co Ltd | 車両用シート |
-
2007
- 2007-06-05 FR FR0704001A patent/FR2917025B1/fr active Active
-
2008
- 2008-05-30 DE DE112008001976.2T patent/DE112008001976B4/de active Active
- 2008-05-30 WO PCT/FR2008/050956 patent/WO2008149044A2/fr not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10315541B2 (en) | 2014-09-02 | 2019-06-11 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Deformation element for a motor vehicle seat |
| US20190184866A1 (en) * | 2017-12-15 | 2019-06-20 | Honda Motor Co., Ltd. | Seat device |
| US10821860B2 (en) * | 2017-12-15 | 2020-11-03 | Honda Motor Co., Ltd. | Seat device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008149044A3 (fr) | 2009-03-12 |
| FR2917025A1 (fr) | 2008-12-12 |
| DE112008001976T5 (de) | 2010-06-17 |
| DE112008001976B4 (de) | 2014-02-27 |
| FR2917025B1 (fr) | 2010-02-12 |
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