EP4077101A1 - Volant de direction - Google Patents

Volant de direction

Info

Publication number
EP4077101A1
EP4077101A1 EP20838419.8A EP20838419A EP4077101A1 EP 4077101 A1 EP4077101 A1 EP 4077101A1 EP 20838419 A EP20838419 A EP 20838419A EP 4077101 A1 EP4077101 A1 EP 4077101A1
Authority
EP
European Patent Office
Prior art keywords
spoke
steering wheel
section
spoke section
central area
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.)
Pending
Application number
EP20838419.8A
Other languages
German (de)
English (en)
Inventor
Fabián Conde Bouza
Jorge Ollero Ollero
Xabier LEMA MARTÍNEZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalphi Metal Espana SA
Original Assignee
Dalphi Metal Espana SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dalphi Metal Espana SA filed Critical Dalphi Metal Espana SA
Publication of EP4077101A1 publication Critical patent/EP4077101A1/fr
Pending legal-status Critical Current

Links

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
    • B62D1/04—Hand wheels
    • B62D1/08—Spokes, e.g. resilient
    • 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
    • B62D1/04—Hand wheels
    • B62D1/11—Hand wheels incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
    • 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
    • B62D1/04—Hand wheels
    • B62D1/06—Rims, e.g. with heating means; Rim covers

Definitions

  • the invention relates to a steering wheel with a monolithic steering wheel body which has a central area for fastening the steering wheel to a steering mechanism, a steering wheel rim and at least one spoke, the first spoke end of which adjoins the central area and the second spoke end of the steering wheel rim.
  • Modern steering wheels for passenger vehicles contain a steering wheel base body (also referred to as a steering wheel skeleton), which is manufactured in one piece from magnesium or aluminum in a die-casting process. They are arranged in the vehicle at an angle to the horizontal.
  • a steering wheel base body also referred to as a steering wheel skeleton
  • the steering wheels in particular the steering wheel skeletons, have an adapted bending stiffness, since in the crash test the steering wheel rim supported by the spokes may only offer a standardized resistance to body contact with a dummy.
  • the spoke must often be designed so that it can bend or kink. However, the spoke must not break, particularly in the area where the spokes connect to the steering wheel rim.
  • the invention is therefore based on the object of creating an improved steering wheel that meets the requirements.
  • this object is achieved according to the invention in that a projection is formed in the area of the first spoke end which limits tilting of the spoke towards the central area to a predetermined amount.
  • the projection is formed on the spoke on its side facing the central area.
  • the projection can be arranged at a point on the steering wheel base body at which other steering wheel components are not hindered.
  • a stop in particular in the form of a coupling device for an airbag module, is formed in the area of the first spoke end on the central area, such that there is a gap between the projection and the stop.
  • the path by which the spoke is allowed to move in the event of a crash can be determined in a simple manner by defining the gap width.
  • the projection extends transversely to the main direction of construction of the first spoke section only over less than a third of the width of the first spoke section and is preferably arranged in the middle.
  • the spoke has a first spoke section, the main construction direction of the first spoke section and the main construction plane of the central area enclosing an angle ⁇ which is between 40 ° and 80 °, preferably between 50 ° and 75 °.
  • the attachment area of the spoke at the central area acts like a hinge which, in the event of a crash, allows the spoke to tilt or fold at the attachment area when a force is applied, but prevents it from being sheared off or broken off.
  • the spoke has a first spoke section and a second spoke section, wherein the main direction of construction of the first spoke section and the main direction of construction of the second spoke section enclose an angle ⁇ of between 30 ° and 70 °, preferably between 40 ° and 60 ° ° is.
  • the transition area of the spoke between the first spoke section and a second spoke section acts like a hinge which, in the event of a crash, causes the spoke or the two spoke areas to fold with respect to one another allowed, so that the spoke can yield when a force is applied to the steering wheel rim, but shearing or breaking off of the steering wheel rim is prevented.
  • the spoke is essentially S-shaped along its main structural directions, i.e. its curvature from its point of attachment on the central area to its point of attachment on the steering wheel rim several times, in particular from an anti-clockwise curvature to a clockwise curvature and again changes to a counterclockwise curve.
  • At least one reinforcement structure is formed which extends along the main structural directions of the spoke on its side facing the central area.
  • the described design of the spoke causes the outer sides of the two spoke sections to fold towards each other when a force is applied to the steering wheel rim, with the transition area between the first spoke section and a second spoke section acting like a hinge, tensile stresses arise on the inside of the spoke at this transition area.
  • the reinforcement structure By providing the reinforcement structure, the rigidity and thus the bending behavior or the resistance to the action of force on the steering wheel rim can be adjusted.
  • At least one receiving point or coupling device for operating elements is formed on the second spoke section.
  • At least one recess is provided on the second spoke section.
  • At least two spokes are provided, these being connected to the steering wheel rim, preferably at 90 ° and at 270 °, when the steering wheel is installed, at a steering angle of 0 °.
  • the steering wheel base body has a foam coating and is optionally provided with a casing (preferably made of leather and / or wood) at least of the steering wheel rim and / or (parts of) the spoke, whereby preferably operating elements, a steering wheel heater and / or sensor device are provided.
  • An airbag module is also preferably provided.
  • a steering wheel can be created that meets modern requirements for user-friendliness and safety.
  • FIG. 1 a schematic partial view (from below) of an embodiment of the steering wheel according to the invention
  • FIG. 2 shows a perspective partial view of the embodiment of the steering wheel base body of the steering wheel according to the invention
  • FIG. 3 shows a partial side view of the embodiment of the steering wheel according to the invention.
  • FIG. 4 shows a schematic view of the steering wheel base body of the steering wheel according to the invention during an impact test.
  • the steering wheel base body 1 which is described in more detail below, is provided with a foam coating 17 in the area of its main spokes (hereinafter: spoke) 5, its optional auxiliary spokes 5a and the steering wheel rim.
  • spoke main spokes
  • Their surface can also be completely or partially provided with a casing, preferably made of leather and / or wood.
  • the steering wheel 1 can be equipped with various operating elements 19 on the spokes.
  • a steering wheel heater and / or sensor device can also be provided on the steering wheel rim 4.
  • an airbag module 18 can complete the steering wheel 1.
  • the steering wheel body 2 is monolithically made as a light metal casting, preferably made of aluminum or magnesium alloy, and has a hub 20 in its center, via which the steering wheel 1 can be attached to a handlebar or a steering mechanism.
  • the imaginary steering axis L extends through the center of the hub.
  • a main structural level Ez of the central area 3 of the steering wheel base body 2 extends perpendicular to it.
  • at least one, preferably 2, and possibly also three or four spokes 5 close to the side of the central area 3 who wear the steering wheel rim 4.
  • the spokes 5 are essentially S-shaped, that is, they have a curvature that changes several times from their attachment area 6a on the central area 3 to their attachment point 7a on the steering wheel rim 4, which in particular changes from a counterclockwise curvature to a curvature in the Changes clockwise and back to a counter-clockwise curve.
  • the spoke 5 as explained in more detail below with reference to FIG. 4, can yield when a force is exerted on the steering wheel rim 4, but a shearing off or breaking off of the steering wheel rim 4 is prevented.
  • the spoke 5 has a first spoke section 11, the main structural direction H1 of the first spoke section 11 and the main structural plane Ez of the central area 3 enclosing an angle ⁇ of between 40 ° and 80 °, preferably between 50 ° and 75 ° , is.
  • the angle ß 70 °.
  • a projection 8 is formed in the area 6 of the first spoke end, which protrudes approximately in the middle on the inside of the spoke 5.
  • This projection is preferably designed like an anvil.
  • a stop 9 is also formed in the area 6 of the first spoke end on the central area 3.
  • a gap 13 is present between the projection 8 formed on the spoke 5 and the stop 9. This can be wedge-shaped or with parallel gap walls. The width of the gap 13 between the projection 8 and the stop 9 determines the amount by which the first spoke section 11 can tilt around its attachment area 6a towards the central area 3 when a compressive force is applied to the spoke 5 (from the steering wheel rim 4) .
  • the rear side of a coupling device 10 for an airbag module can preferably function or be designed as a stop 9.
  • At least one reinforcement structure 14 is formed in the transition area from the first spoke section 11 to the second spoke section 12, which extends along the main structural directions H1, H2 extends the spoke 5 on its (inner) side facing the central area 3.
  • the number (three in the embodiment shown) and the respective width and height of the reinforcement structures 14 provided can be used to set the rigidity and thus the bending behavior or the resistance to the action of force on the steering wheel rim 4.
  • FIG. 4 shows an impact test in which a dummy body D strikes the steering wheel rim 4 of a steering wheel base body 2 of the steering wheel 1 according to the invention.
  • the illustrated impact of the dummy body D causes a strong force to be exerted on the steering wheel rim 4, as a result of which it is deformed predominantly in the direction of the steering axis L.
  • this force hits the spoke 5.
  • a break at one of the attachment points 6a or 7a is at least theoretically conceivable if the spoke 5 are excessively bent.
  • the spoke breakage can be prevented in the critical regions.
  • stresses that exceed the yield point of the material can be avoided on the outer regions of the flexurally loaded attachment points 6a and 7a of the spoke 5.
  • a controlled bending of the spoke 5 is brought about at the transition area from the first spoke section 11 to the second spoke section 12. Due to the described design of the spoke 5, when a force is applied to the steering wheel rim 4, the outsides of the two spoke sections 11, 12 fold towards each other, the transition area between the first spoke section 11 and a second spoke section 12 acting like a hinge. The angle a between the main directions H1 and H2 of the spoke also contributes to this.
  • the reinforcement structures 14 are provided in order to adjust the bending behavior due to the tensile stresses that arise at this transition area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Controls (AREA)
  • Air Bags (AREA)

Abstract

L'invention se rapporte à l'amélioration de la structure d'un volant de direction. Selon l'invention, un volant de direction comprend un corps principal de volant de direction monolithique qui comprend une région centrale pour fixer le volant de direction à un mécanisme de direction, un bord de volant de direction et au moins un rayon, la première extrémité de rayon étant adjacente à la région centrale et la seconde extrémité de rayon étant adjacente au bord de volant de direction. Dans la région de la première extrémité de rayon (6), une saillie (8) est formée qui limite l'inclinaison du rayon (5) vers la région centrale (3) dans une mesure prédéterminée.
EP20838419.8A 2019-12-20 2020-12-17 Volant de direction Pending EP4077101A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019135456.0A DE102019135456A1 (de) 2019-12-20 2019-12-20 Lenkrad
PCT/EP2020/086784 WO2021123001A1 (fr) 2019-12-20 2020-12-17 Volant de direction

Publications (1)

Publication Number Publication Date
EP4077101A1 true EP4077101A1 (fr) 2022-10-26

Family

ID=74141490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20838419.8A Pending EP4077101A1 (fr) 2019-12-20 2020-12-17 Volant de direction

Country Status (4)

Country Link
US (1) US20230039647A1 (fr)
EP (1) EP4077101A1 (fr)
DE (1) DE102019135456A1 (fr)
WO (1) WO2021123001A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549285A1 (de) * 1975-11-04 1977-05-12 Schmidt Gmbh Karl Sicherheitslenkrad fuer kraftfahrzeuge
JPH06144242A (ja) * 1992-10-30 1994-05-24 Suzuki Motor Corp ステアリングホイール構造
DE19801514B4 (de) * 1997-01-16 2005-08-04 Toyoda Gosei Co., Ltd. Lenkrad mit Hupenschaltbaugruppe für das Lenkrad
JP3327163B2 (ja) * 1997-03-31 2002-09-24 豊田合成株式会社 ステアリングホイール
US6622590B2 (en) * 2000-03-15 2003-09-23 Nihon Plast Co., Ltd. Core bar for steering wheels
JP2005132238A (ja) * 2003-10-30 2005-05-26 Koyo Seiko Co Ltd ステアリングホイール
DE102004015529B4 (de) * 2004-03-30 2009-08-27 Key Safety Systems, Inc., Sterling Heights Lenkrad für ein Fahrzeug
JP6300383B2 (ja) * 2016-06-23 2018-03-28 本田技研工業株式会社 車両用ステアリングホイール

Also Published As

Publication number Publication date
DE102019135456A1 (de) 2021-06-24
US20230039647A1 (en) 2023-02-09
WO2021123001A1 (fr) 2021-06-24

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