The present invention pertains to a device for mounting a pedal lever for a motor vehicle which is accommodated in a housing pivotably around at least one bearing element.
The increasing requirements imposed on motor vehicles in terms of increasing safety are seen in numerous systems. In pedal fastening means, there is a known risk for accidents in that a deformation of the engine compartment directly or indirectly affects the pedals and these are moved into the leg room of the motor vehicle. The serious injuries to the lower extremities, which can be caused by jamming between the pedals, can be considered to be the risks associated for the driver of the vehicle.
To avoid these risks of injury, separating mechanisms are known, which utilize the introduction of force from the outside, which is caused by the accident, to drive at least one separating wedge between two cheeks of a housing pivotably accommodating the pedal lever or the pedal levers in order to make possible as a result the release of the bearing bolt carrying the pedal lever. However, these solutions have not ultimately proved successful, because the mounting of such systems is rather complicated and at least the deformation areas must be made of metallic materials. However, it is advantageous in connection with the weight reduction of the assembly units present in the motor vehicle to manufacture the largest possible number of parts from light-weight materials, e.g., plastics.
The technical object of the present invention is to provide a device for mounting a pedal lever, which reduces the risk of injury and the degree of severity of the injuries to the driver of the vehicle.
This technical object is accomplished by a device of this type for mounting a pedal lever which is accommodated in a housing pivotably around at least one bearing element. At least one section of a separating wedge is supported via a support surface against a motor vehicle component and brings about the shearing off of the bearing element due to the action of an external force caused by an accident due to a relative movement between the separating wedge and the bearing element by applying a shearing force. This separating wedge is accommodated between a surface of the housing and the bearing element.
It can thus be achieved that as a consequence of the action of an external force, which is caused by an accident, a relative movement takes place between the separating wedge and the bearing element, which brings about the shearing off of the bearing element due to the application of a shearing force. This relative movement arises either from the deformation of the motor vehicle component or from the movement of the housing, which in turn originates from a deformation of parts of the motor vehicle. Consequently, the shearing off, i.e., the destruction of the bearing element, is correspondingly brought about deliberately according to the present invention in order to guarantee the necessary protection of the passengers. A bearing bolt or a bearing bush, which mount the pedal lever pivotably, may be used as a bearing element.
The device has, on the whole, a very simple design and can be manufactured nearly completely from light-weight materials, such as plastic. As such, there are hardly any limits to shaping.
According to one embodiment of the present invention, it is proposed that an abutment for contacting and slidingly movably guiding the separating wedge be provided at the housing. This abutment may have a ramp function, so that the separating wedge can exert its shearing action on the bearing element. At the same time, this abutment makes possible the clearance-free contact of the separating wedge between the abutment and the bearing element during normal operation.
To improve the shearing action, it is advantageous to provide the separating wedge with at least one wedge-shaped or arc-shaped active surface on the side facing the bearing element. As a result, it is possible to clearly define the point in time at which the bearing element is completely separated as a function of the path traveled by the separating wedge.
A variant of the present invention can, furthermore, be seen in the bearing element traversing two cheeks of the housing located at spaced locations from one another and by the pedal lever being arranged approximately in the middle between the cheeks on the bearing element. A distance is present now between the pedal lever and the respective associated cheek on both sides of the pedal lever, so that the separating wedge, which is provided with two legs in at least this area, is directly in contact with the bearing element, on the one hand, and with the abutment, on the other hand.
As was mentioned above, the relative movement between the separating wedge and the bearing element can also be achieved by the vehicle component to which the housing is fastened being deformed. It is correspondingly meaningful to fasten the housing at the front wall in the leg area on the driver's side of the motor vehicle, because the front wall is usually deformed relatively greatly in an accident, and the advantageous effect of the solution according to the present invention is achieved as a result at an early point in time. The motor vehicle component may be correspondingly the cross beam located closest.
To facilitate the shearing off, it is, moreover, appropriate and advantageous to provide the bearing element with at least one predetermined breaking point. Furthermore, the bearing element may be designed as a one-part or two-part bearing bolt. The two-part design has especially advantages in terms of mounting. However, it should be ensured in this case that each of the pin parts is shorn off by the separating wedge during the accident. However, a bearing bush, which can likewise be shorn off by the action of the shearing force, may also be considered to be a bearing element corresponding to the present invention.
Since the brake pedal of a motor vehicle is connected, e.g., to a brake booster and the latter has a brake rod, the deformation of the front wall in this area may have an especially strong effect, so that there is a risk that the pedal lever is moved into the passenger compartment by an unacceptable large amount before the shearing off of the bearing element. To counteract this situation, it is proposed that a blocking member, which limits the evading movement of the pedal in the direction of the passenger compartment during an accident, be provided at the housing in a solution according to the present invention.
To fix the separating wedge, which is normally inserted loosely between the cross beam and the pedal mount, a securing means for holding at the housing is, furthermore, provided between the separating wedge and the housing.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which a preferred embodiment of the invention is illustrated.
In the drawings:
Referring to the drawings in particular, for mounting a pedal lever 1 of a motor vehicle, the device shown in
The separating wedge 5 brings about the shearing off of the bearing element 2 as a consequence of the action of an external force caused by an accident due to a relative movement between the separating wedge 5 and the bearing element 2 by applying a shearing force. The separating wedge 5 comprises in the embodiment being shown a basic body with which two parallel legs 14, 15 are made in one piece. On the side facing the bearing element 2, these legs 14, 15 have an active surface 8 each. The active surface 8 was shaped as an arc-shaped contour in this case. The parallel arrangement of the legs is advantageous, because the shearing force can be applied uniformly on two different areas of the bearing element 2 under the action of the external force, so that the bearing element can be severed with certainty and reliably when this is necessary. The bearing element 2 traverses two cheeks 10, 11 of the housing 3. The two cheeks 10, 11 of the housing 3 are arranged at spaced locations from one another. The pedal lever 1 is arranged on the bearing element 2 approximately centrally between these cheeks 10, 11, so that there is a distance 12, 13 between the pedal lever 1 and the respective associated cheek 10 or 11 on both sides of the pedal lever 1. These distances 12, 13 form contact areas for the active surfaces 8 of the separating wedge 5 at the bearing element 2. The distances 12, 13 should not be substantially greater than the width of the legs 14, 15. On the side located opposite the active surface 8 of the separating wedge 5, the separating wedge 5 is in contact with a housing surface designed as an abutment 6.
As is apparent from the sectional view in
As is apparent from
To avoid an unacceptably wide movement of the pedal lever into the passenger compartment, a blocking member 16 is arranged at the housing 3. The blocking member limits the evading movement of the pedal in the direction of the interior space of the vehicle during an accident.
While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.
Number | Date | Country | Kind |
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100 64 770 | Dec 2000 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/DE01/04807 | 12/19/2001 | WO | 00 | 8/14/2002 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO02/05166 | 7/4/2002 | WO | A |
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5778732 | Patzelt et al. | Jul 1998 | A |
5896781 | Muller | Apr 1999 | A |
6041674 | Kato | Mar 2000 | A |
6089342 | Muller et al. | Jul 2000 | A |
6101894 | Tiemann et al. | Aug 2000 | A |
6112616 | Schonlau et al. | Sep 2000 | A |
6354171 | Wolpert et al. | Mar 2002 | B1 |
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195 15 852 | Nov 1995 | DE |
196 31 868 | Feb 1998 | DE |
197 31 644 | Jan 1999 | DE |
100 28 117 | Dec 2000 | DE |
0 827 874 | Mar 1998 | EP |
1 059 208 | Dec 2000 | EP |
Number | Date | Country | |
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20030000335 A1 | Jan 2003 | US |