DE2025707B - Energy dissipator for motor vehicle steering columns - Google Patents

Description

In a further embodiment of the invention is provided

45 see that the webs of both sets with essentially

The invention relates to an energy-V-shape which is inclined inwards and has its apex in

Zehrer for motor vehicle steering columns, consisting of a common to the central longitudinal axis of the tubular

a tubular, two cylindrical end pieces lie in the middle of the radial plane,

interconnecting middle part, which is further provided by several, that the webs are from the

Web is formed, which extends to one between the 50 end pieces of the tubular central part in their

End pieces taper lying transverse plane to the central longitudinal width.

Axis of the tubular central part extend inclined. It is also advantageous if, in the event of a collapse,

Such an energy dissipator is, for example, surfaces of the tubular middle part, the webs of the two-

by U.S. Patent No. 3,364,785. th set come to rest against each other and

In the case of the known energy consumer, a set 55 is mutually exclusive when it is further compressed

pre-deform radially outwardly inclined by resilient webs.

seen. In the area of these webs breaks in an im The invention is shown in the drawing on the basis of one

explained essentially in the direction of the central longitudinal axis as a result of the exemplary embodiment. It shows

a vehicle collision acting force of FIG. 1 is a partial side view of a motor vehicle

Energy consumers together, the webs being connected by 60 with a part of the steering column with associated energy

Bending outwards are deformed and in doing so, casting consumers,

Consume energy. F i g. 2 shows an enlarged detail from FIG. 1 in FIG

This known design requires a considerable cut,

Space to allow the webs to bend outwards. 3 is a side view of the energy consumer in FIG

possible. The amount of energy to be consumed is 65 in its original state,

because the individual webs are independent of input. 4 is a side view corresponding to FIG. 3 with

deform other. Furthermore, the possible earth is collapsed after a collision.

energy consumption not fully utilized if the energy consumed by the energy consumer

Fig SdenSchnittnachderLinieS SinFigA-det, whereby the webs ^ ^ dereinzehi

Figure 6 shows the corresponding section of Figure 5 at fangsnchtung "^ ec ^ £» »*% *> webs 44 of the n ^ engebrochenem energy consumer, ^CMEs" f ^ S ^ SS fSie of the first set are RA

Relate to state

¹ Tn a KraftfaLzeugkörper 10 is a steering column »same Langevsodaß gStejHJde ^^ 12 anaeordnct, which is suspended on an instrument panel 14 of the one-vehicle body 10 formed _{at 4 <* J ^ dung des ι ™ §g £ der s0 and within the P ^^} mSiI ^ ° £ Fig-5, which the pihSastabteUs at the upper end with a steering g ^^^^ lnd the apex α of the webs42 handfad 16 is provided. This actuates a steering ^^^^^^ derMittdUingsawhwvcr-Se, which is surrounded by a jacket tube 18 x ₅ and 44 of the ^ two sets ^> ⁿ ^ _{6 inclination} and

The steering handwheel 16 has a ring (Fig.2) with ^ f ^ ^c ^ Sung determines the predictable an inner steel core, which is of a semi-rigid T, efe der Emschnumng D ^ _{bej dem Zu} _

Wer ^ toff made of plastic or the like. Is surrounded by behavior ^de . ^r "^^" gverzehrers at a presets, ρ certain energy absorption upon impact of ^sammenbre ^ _e ^ f Te to cause the Drive "by the impact of the S-P ^. The ring is udrad Lenkh-over PJS _M ^ ÄjiS'to 16 de in Vornich spokes, illustrated with a support ring 22 in the body i driver _is at the α connected p _as the hub of the steering handwheel, the en essen- wartsnchtung J ^s ^ Ug J ^^ of SWichen channel-like shape has and nut its by this force ™™ ™ ^R _{According to} give the rim Auiknrand with a disc-shaped cover disc Energieverzehrers beding! β _{Dk amlen} ^ welded and ₅ 20 of £ ^ ££ ^ 24 simultaneously forms an axial investment *, on the Energiefläclie for the hub of the steering handwheel. the force - the * ™™ ^u _{d stü} tzen at TragneckUeibe 24 bears with the central part a cover devourer about Wear ^ is ^ su _{"steering shaft} 38 m ^ of plastic or other semi-rigid ^s * f ^be JV _m 'edge Xchd" _e support surfaces 46! on the material and can be provided with a decoration . It will be too much. within the lid 26 is a push-button 30 ^^ SS ^ JJ dta may be axial force in wesentlischalter 28 disposed on a lower horn ⁿ ^^ st assumed _Energy-V erzehrers Sb 32 of the cover disk 24 and on the outer periphery of the surfaces in ^d "Mitteuangs ^ ^ _wesenthchen TragHnges 22 is supported a sleeve 30 made of metal acts so that tege ^ * z _{wgrden This} Vose address, the 18 gteichmaBg "J ^ gJ" e ^ hen the upper part of the casing tube a _PRE-d:; ^g steering column 12 encloses and can also be provided with a 35 ^ JS ^ buckling of the webs 42, decoration. . Are less inclined. Achieve this the webs 44 aufwei-form of a tubular central portion 32 disposed at the Em-Within the shell 30, an energy devourer in which Jj * J * ^e 'g ^ J _waving l, kink nbrechen the veins _Zusamme of the with a lower cylindrical End piece against sen ^^^ jf ^ J42 and 44 together after indi sleeve 30 is slidably supported. In this area 40 middle part ^ 32 throws _in ^B _Fig . ₄ dargestel te to a shoulder 34 formed at the center portion and _n with newly em ^{u "d} / _e f _n ^a 2 and _he are nested, as dtsem welded a support disk 36th the supporting position in the« ~ ⁿ _{9 ^d is seen} ^g, m this 3-disk "has a central hub in whose borings from the Mg. ο adjacent webs tion the end of a steering shaft 38 is seated on which a J ^^ '^ J dngeschlossen since the Knickl.nie "nut is screwed. 39, the edge of the support 45 ^ ™ £ ° _ι ηάεΓ webs 44 of the center longitudinal axis of the disc 36 by supporting surfaces 46 on the jacket tube ^ J" ^^ _näh ° _r than the buckling line α b to the D Edstück of the central part 32 Mrtteheris »something η ^ ^ ^. ^. ^ _Fl

Disk 36 is due to support surfaces 46 on Ma ^ J ^^ _closer than the kink line α

18 supported. The upper end piece of the middle part 32 Mrtteheris »something η ^ ^ ^. ^. ^ _Fl

Against a cover plate 24 on the underside, see te η of Mege 8 _{radially downward}

provided reinforcement washer so that in the we- Scherteta the mege ^ _{fl of the webs} 42 all -

mustful axial forces from the cover disk 24 to 50, ^ ° _{the complete} n collapse

the energy consumer and the support disk 36 via ramahhch so that ^ uiz ^ _p . _{g? d} , _d

genes can be. The upper cylindrical end piece rather * «Jjme _{B and} ^ _and ^ _{nßb die} .

5 middle part 32 is welded to the support ring 22 ^ ck ^ n «the g _{to one} another ^

genes can be. The upper cylindrical En Jj _and ^ _and ^ _{nßb d}

The middle part 32 is welded to the support ring 22, which comes _together

As the F i g. 3, 5 and 8 show the tubular «sen negmaen _{which overlap} ends

Sil 32 constricted and contains over the um- 55 g ^^^ ⁷ SLen Scheiteina over parts il slots 40, between which webs formed surfaces, ae _{β their} ^^, _{a gda t so}

^ dilSnÄungdesWelteihzubewiAenwo- ^ _"r" ^ S ^ r you ge _f "each Ii ^ _- at the vertices in a common transverse plane Lie stisüie ver s ^ J _{4- 0"} _ _{SOI, the}

«" While at the roots of the webs you struggle with b S ₅ ge "d.nTa" _{Β8γΑ du d}

are alive. The webs therefore have emwaits also '^ _{dm darch beading} rim

1SSU "- -—" - ** ■ ^8ebil - ^ '" ^{in the area of vengeance} " ^c

along with the elongation of the webs 44 and the deformation of the tapered shape to allow the folding into one another in

Web 42 under pressure in the area of the free, not the final stages of the collapse of the energy

overlapping areas d (Fig. 6). gieverververhrers, whereby, however, an un-

In addition to this interference at the edges between the ste-

of the webs 42 and 44 in the final stages of the assemblies 42 and 44 is avoided, the proper

breaking achieved energy consumption will interfere with the energy buckling to produce the overlap

energy consumers against the actual direction of the dignity. In general, the length, width and

practiced force relatively insensitive, so that the number of webs are chosen so that when

the energy consumer then also a fully collapsing collapse of the energy consumer

Chen can if the axial force results, for example, in io continuous annular surface, as shown in FIG. 6 dar-

is made inclined at an angle of 25 ° to the central longitudinal axis, the diameter of which is large enough to

is exercised. Even if the nut 39 of the steering shaft 38 is to be included under these conditions,

one side of the steering handwheel and its hub, the larger the diameter of the cylindrical end

Finally, the energy consumer 32 higher loaded pieces of the middle part 32 is chosen, the greater

15, the distance can be selected that is suitable for the full-

In this area, however, the aforementioned constant collapse of the energy consumer

Nesting of the adjacent webs 42 and 44 is available in that the inward buckling of the

Sufficient dimensions for the interaction to require webs. A number greater than twelve bars

to ensure, being by a progressive can with a corresponding reduction of its width

Reaction the interlocking of the webs 42 and 44 20 are provided. Likewise, with a

number of wider webs are worked over the entire circumference of the tubular joint,

telteils 32 continues, so that this is also wrong for the operation of the energy consumer

acting axial force a uniform over- except for the spatial dimensions of the webs 42 and

is carried over the entire circumference and of course also the properties of the material

Energy consumers 32 after the collapse the 25 of importance, which also take up the possible

assumes the same position as with an exactly axial determining energy and the buckling load. as well

claim. is the pretreatment of the material, such as heat

The nesting of the webs 42 and 44 on treatment and the like., Of influence. With the axial approach

their Scheiteina and the alternating stress breakdown of the energy consumer 32 can

Chung on tension and pressure causes the webs to slide a casing 30 freely over the end of the casing tube 18.

Assume a shape in which the smallest radius at the ten. In a modified way, a deformation can also

Vertex α occurs, as shown in FIG. 7 shows. As a result, the envelope 30 takes place in a predetermined manner.

there is a large collapse of energy in order to generate additional energy consumption.

gieverzehrers 32 allows and thus a corresponding len, then the shell with its lower edge

adequate energy consumption guaranteed. 35 is to be welded to the energy consumer 32. the

Even if the angles of inclination of the webs in the inwardly inclined webs 42 and 44 of the invention

The initial state of the energy consumer due to a moderate design do not require any additional protection,

Experiment to be adapted to the special conditions so that the sheath 30 is smooth in shape with relatively

it has been found that good results can be formed with a relatively small diameter,

Nisse at an angle of 15 ° to the central longitudinal axis 40. In the exemplary embodiment, the energy dissipator is shown in FIG

of the middle part 32 for the webs 42 and incorporated by 20 ° for the head of the steering column. But he could

Web 44 can be achieved. In the exemplary embodiment, they are also incorporated into a part of the casing tube

formed on the central part 32 twelve webs that are something.

1 sheet of drawings

Claims (4)

1 2 Collision of the motor vehicle caused force Claims: does not act in the central longitudinal axis of the energy dissipator on the webs, because then an uneven 1. Energy dissipator for motor vehicle steering column bending of the webs takes place len, consisting of a tubular, two cylindrical 5 The object of the invention is to avoid the disadvantages of the known design which connect the cylindrical end pieces to one another.
Central part, which is formed by several webs, this object is achieved according to the invention in that the tubular transverse plane lying between the end pieces is constricted to the central longitudinal axis of the tubular central part and inclined from two sets of shaped central part extend, since it is formed by webs which extend in the circumferential direction characterized in that the tubular central part lying between alternate and of which the webs of the second end pieces is constricted up to a smaller distance from the center (32) and from two sets of longitudinal axis extending as the webs of the first saw (42, 44), which alternate in the circumferential direction, and that when the energy distribution collapses and from which the webs (44) of the zehrer and before this is finished, the first second set overlap up to a smaller kinking webs of the first set from the central longitudinal axis as the end parts of the webs of the second set to the contact webs (42) of the first set, and that when they come together. break of the energy consumer and before the- The energy consumer according to the invention has to- scs is finished, the first buckling webs of the 20 next have the advantage that when the collapses first set against overlapping parts of the webs middle part the webs are not bent outwards of the second movement come to the plant. but buckle inwards and, after 2. Energy consumer according to claim 1, characterized in that they have come to rest against each other, marked against, that the webs (42, 44) deform both sides. Due to this deformation there is a high sentence with an essentially V-shape inwardly more energy consumption is achieved, so that the effect tends to be achieved and their vertex (α) is increased in a common degree of the energy consumer. In addition, to the central longitudinal axis of the tubular Mit- the interlocking of the webs in the joint part (32) lie in the radial plane. break the middle part another resistance 3. Energy consumer according to claim 1 or 2, against the compression and deformation of the characterized in that the webs (42, 44) 30 webs, whereby additional collision energy provides is consumed by the end pieces of the tubular central. partly (32) towards their apices (α) in their width. This type of construction with inwardly buckling webs is rejuvenate. particularly suitable for those purposes where a 4. Energy consumers go to one of the previous spaces inside for the webs to buckle Claims, characterized in that 35 can be joined. Furthermore, this design is advantageous if it When the tubular central collapses, what matters is the energy consumer from outside partly (32) cover the webs (44) of the second set, for example when this is in the passenger cantilever come to the system and lie near the white space of a motor vehicle. Furthermore can through deform tere compression mutually. the inward buckling of the bars in the 40 broken state of the energy consumer a protective shield are formed for parts of the steering column where- NEN the energy consumer is attached, for example the steering shaft.