CN1162544A

CN1162544A - Vehicle steering wheel for equipment with integrated gas bag restraint system

Info

Publication number: CN1162544A
Application number: CN97104873A
Authority: CN
Inventors: 亚历山大·海利希
Original assignee: TRW Occupant Restraint Systems GmbH
Current assignee: TRW Occupant Restraint Systems GmbH
Priority date: 1996-03-22
Filing date: 1997-03-21
Publication date: 1997-10-22

Abstract

A vehicle steering wheel for equipment with integrated gas bag restraint system comprises a deflecting roller body (10) jacketed by foam materials. The wheel spider member (22) of the roller body (10) comprises a backside cavity used for loading a collapsible gas bag together with a pressure boost air source. An end face mask, as a constituent part of the foam material jacket (12) of said deflecting roller body (10), comprises reinforced structure (24) of the foam material jacket connected integrally to the wheel spider member (22).

Description

Be used to have the pivoted wheels on vehicle of the equipment of integrated gas bag restraint system

The present invention relates to a kind of pivoted wheels on vehicle that is used to have the equipment of an integrated gas bag restraint system, this ambition wheel comprises the wheel body that turns to of a foamed materials jacket, this turns to the wheelboss part of wheel body to comprise that one is used for a collapsible airbag and a pressurized gas source are placed in together rear side cavity and a face shield, and this face shield is a component part that turns to wheel body foamed materials jacket.

People know a kind of such pivoted wheels on vehicle from DE 44 23 963 A1.This known wheel flutter simply is configured as characteristic with a kind of, is a whole component part that turns to wheel body foamed materials jacket because be used for inserting the face shield of the bag module of hollow wheels boss assembly, so do not need to make separately and assemble this face shield.

The invention provides a kind of pivoted wheels on vehicle of the above-mentioned type, this wheel flutter is used for the face shield of bag module no longer can be torn fully when airbag launches and just open, and changes shape in a kind of mode that can be scheduled to better.For this reason, comprise that according to the face shield of pivoted wheels on vehicle of the present invention an integral body is connected to the ruggedized construction of the foamed materials jacket on the wheelboss part, therefore do not need other reinforcement.Because this configuration, ruggedized construction can be arranged in this cover with simple and cost-effective method.Though disclosed this pivoted wheels on vehicle has also been equipped a kind of ruggedized construction in DE 44 23 963 A1, this structure is not to be connected to turn on the wheel body, but inserts in the foamed materials jacket.But, if one of foamed materials jacket is not connected to the wheel body that turns on other parts fully, with regard to special requirement better effect is arranged so, because an aspect need will turn to wheel body to remain fixed in correct position during the foamed materials jacket, and on the other hand, desired for this reason maintaining body must be removed after a while, to guarantee all to use the foamed materials jacket.Possible recycling according to pivoted wheels on vehicle of the present invention is very simple, because there is other different materials introducing not have in the pivoted wheels on vehicle of ruggedized construction on the one hand, and in according to pivoted wheels on vehicle of the present invention, contain separated parts still less on the other hand.

This ruggedized construction is preferably with turning to wheel body to cast in, and comprises at least one groove, and when airbag launched, this groove produced the curved openings of the qualification that a ruggedized construction is wrapped in foamed materials.

According to a preferred embodiment, this ruggedized construction longitudinally slot with a U-shaped cross-section, crossbeam and shank to be connected to hub portion be characteristic, therefore produce two flap shape parts, these two flap shape parts are outwardly-bent and allow in the explosion of longitudinal slot face shield when airbag launches.

According to another embodiment, this ruggedized construction comprises at least one weakened region, and this weakened region causes the curved openings of a qualification of ruggedized construction when airbag launches, and therefore can be scheduled to the curved openings or the fracture position of this ruggedized construction.

According to the ruggedized construction of this preferred embodiment facing to the profile that rises, thereby tearing of can be scheduled to better cover.These profiles can be cutting edge that stretches out and/or the spot pressure that stretches out.This cutting edge is at least one groove orientation on the ruggedized construction opposite sides thereof preferably, so that reach the best possible qualification of covering explosion when airbag launches and when this ruggedized construction bending is opened subsequently.Except this point, be used to tear the required power of cover and reduce greatly thus.

According to another embodiment, when this ruggedized construction comprised opening, it preferably was connected on its foamed materials jacket on every side.

Accompanying drawing by following explanation and institute's reference will be understood that other characteristics of the present invention and advantage, in the accompanying drawings:

Fig. 1 is according to the transparent view of an embodiment of pivoted wheels on vehicle of the present invention before the jacket foamed materials;

Fig. 2 illustrates the local pivoted wheels on vehicle of using Fig. 1 of foamed materials jacket;

Fig. 3 is according to the transparent view of second embodiment of pivoted wheels on vehicle of the present invention before the jacket foamed materials.

Pivoted wheels on vehicle comprises a wheel body 10 that turns to shown in Figure 1, and this turns to wheel body to comprise a Vehicular turn wheel rim 14 and a rectangle wheelboss part 22 that is positioned at central authorities, turns to wheel rim 14 to be attached on the wheelboss part 22 by three spokes 18.This wheelboss part 22 has a rear side cavity, and the opening of this rear side cavity is loaded onto wheel rim by an annular interface, wheelboss part 22 can be attached on the steering shaft (not shown) by this annular interface.Be cast on these wheelboss part 22 end faces is a ruggedized construction that protrudes upward 24.This ruggedized construction 24 has a U-shaped cross-section, a crossbeam is provided with a central groove 30 that accounts for its whole length, so that constitute two flap shape parts, each flap shape parts all comprises roughly the meet at right angles bow-

shaped part

26,28 of this crossbeam of combining with

leg

32,34 of 32,34 and one of a leg that are attached on the wheelboss part 22.Because this ruggedized construction 24 forms 42, one bag modules of being made up of collapsible airbag and pressurized gas source of an inner room and can insert in this inner room 42, this inner room opens wide and local opening wide on both sides to the back side of wheelboss part 22.

Turn to the preferably die-cast part of aluminium or magnesium of wheel body 10, but also be admissible by the body 10 that turns to that a kind of glass fiber reinforced plastic is made.

The wheel body 10 that turns to shown in Figure 1 is provided with as the foamed materials jacket 12 that is made of plastics indicated among Fig. 2, and the part of the wheelboss part 22 of the circle of this foamed materials jacket 12 on ruggedized construction 24 and face has been removed.The jacket of this foamed materials passes and is arranged on leg 32, the inside that opening 40 in the ruggedized construction 24 in 34 and in the

parts

26 and 28 of crossbeam extends up to inner room 42, it encases ruggedized construction 24 and wheelboss part 22 there, thereby form the face shield that inserts the bag module in the pivoted wheels on vehicle, this face shield is made of the foamed materials jacket that ruggedized construction 24 strengthens.

When airbag launched, parts 26,28 K/UPs and this foamed materials were wrapped in the zone of groove 30 and tear, thus make airbag can be fully people's direction in the car launch.Open conveniently for the bending that makes ruggedized construction 24, these zones can be provided with a cross-sectional plane that dwindles.Except this, a longitudinal groove also can be set replace groove 30, this groove produces a cross-sectional plane that dwindles to be weakened a little to form a design-calculated, and this weakens a little and for example also can form by punching.

Second embodiment of pivoted wheels on vehicle shown in Figure 3 comprise one basically with the wheel body 10 that turns to accordingly shown in Figure 1, the rising profile of cutting edge 36,38 forms with triangular cross section also promptly only is set on the end face of ruggedized construction 24.The bonded assembly edge that do not have of the ruggedized construction of these cutting edges 36,38 on

parts

26,28 upsides extends.Especially on the both sides of groove 30 and along the cutting edge 38 of this groove 30 orientations, define an important explosion line, because their slit foam material jackets when airbag launches.The opening of cover is subjected to the control of cutting edge 36,38 preferably, therefore, whole cover explosion is fallen.Except this point, cutting edge 36,38 needs less power when tearing cover, and it is faster that this launches airbag.

Replace cutting edge 36,38, or in addition, also pressure rising point can be set on

parts

26,28, these points are because in one determines that the position is with the power introduced cover, thereby make and tear cover easily.

Though described a kind of rectangle wheelboss part 22 at the embodiment shown in Fig. 1-3, on vertical side of this wheelboss part 22, one half-sum parts, 26,28 casting of the flap shape of the

leg

32,34 of composition ruggedized construction 24 are in place, but the wheelboss part 22 with other geometric configuration can be set.For example,, a tubular ruggedized construction then can be set be included in several grooves on end face and the sleeve surface, make that when airbag launches this cover is star and tears if this wheelboss part 22 has a toroidal.

Claims

1. pivoted wheels on vehicle that is used to have the equipment of integrated gas bag restraint system, what comprise a foamed materials jacket turns to a wheel body (10) and a face shield, this turns to the wheelboss part (22) of wheel body (10) to comprise a rear side cavity, a collapsible airbag and a pressurization air source are used for packing into together, and this face shield is a described component part that turns to the foamed materials jacket (12) of wheel body (10), it is characterized in that described face shield comprises that an integral body is attached to the ruggedized construction (24) of the foamed materials jacket on the described wheelboss part (22).

2. the pivoted wheels on vehicle described in claim 1 is characterized in that, described ruggedized construction (24) and the described wheel body (10) that turns to cast in together.

3. the pivoted wheels on vehicle described in claim 1 or 2 is characterized in that, described ruggedized construction (24) comprises at least one groove (30), and when described airbag launched, this groove (30) produced the bending of a kind of qualification of described ruggedized construction and opens.

4. the pivoted wheels on vehicle described in each claim of front is characterized in that, described ruggedized construction (24) has a U-shaped cross-section, and comprises the vertically crossbeam and the leg (32,34) that is attached on the described wheelboss part (22) of fluting.

5. as each described pivoted wheels on vehicle among the claim 1-3, it is characterized in that described ruggedized construction (24) comprises at least one weakened region, this weakened region produces the bending of a kind of qualification of described ruggedized construction (24) and opens when described airbag launches.

6. the pivoted wheels on vehicle in each claim as described above is characterized in that, is provided with the profile of rising on the end face of described ruggedized construction (24), is used to limit the supporting of described cover.

7. the pivoted wheels on vehicle described in claim 6 is characterized in that, described profile is cutting edge (36,38) that stretches out and/or the spot pressure that stretches out.

8. the pivoted wheels on vehicle described in claim 3 and 7 is characterized in that, described cutting edge (38) is orientated along described at least one groove (30) on the opposite sides thereof of described ruggedized construction (24).

9. the pivoted wheels on vehicle described in claim 7 or 8 is characterized in that, described cutting edge (36,38) is arranged on not having on the continuous edge of described ruggedized construction (24).

10. each described pivoted wheels on vehicle in the claim as described above is characterized in that described ruggedized construction (24) comprises many openings (40).