CZ301574B6 - Apparatus for pedal detachment in the course of vehicle frontal collision - Google Patents

Abstract

n the present invention, there is disclosed a pedal release device in a motor vehicle in case of a front impact comprising a transmission arm (6), connected to a swiveling pedal leg (5) through an axial coupling (7) in the pedal leg (5) turning axis. Said transmission arm (6) is in contact with a controlled member being represented by a brake power assist unit or a main brake or coupling hydraulic cylinder. A pressure spring (4) and a disengaging member (10) are assigned to said axial coupling (7). A first part (8) of the axial coupling (7) is fixedly coupled with the pedal leg (5) while the second part (9) thereof is coupled with said transmission arm (6). The disengaging member (10) abut a vehicle frame (12) at a point that is farther from the point of the vehicle front impact if compared with the point of the pedal leg (5) rotatable mounting. The disengaging member (10) is provided with a wedge-shaped portion that reaches between the axial coupling (7) parts (8, 9) and further with a support (11) serving as driver side abutment for the pedal leg (5) when the disengaging member (10) disengages the axial coupling (7).

Description

Technical field

The invention relates to the field of passive safety of vehicles, in particular to a device for releasing a pedal in a frontal impact of a vehicle.

io Hitherto celebrated technology

One of the factors significantly affecting the driver's safety in a frontal impact is the pedal with safety element. PH of the frontal impact of the vehicle is first endangered the driver's feet, for the bed pedal system proceeds towards the rear of the vehicle. In principle, the design of the safety elements is based on the deformation of the parts in the sequence from the front to the rear. A part placed further in the direction of progressive deformation away from the part in front of it will retain its shape longer and the consequences of the impact will be reflected on it later.

Known pedal solutions to reduce the risk of injury to the driver ' s foot in a frontal collision of a vehicle can be subdivided into essentially tH groups. The first group uses a destructive element, most commonly a pedal mounting bracket or pedal support axis, and which is deformed by the pH of the frontal impact so that the pedal "falls off" from its seat and is no longer able to act on the foot of the Hdič. The second group uses the disengagement of the pH-shaped pH-shaped frontal impact elements to release the pedal. The third group relies on pressure relief from the booster or hydraulic cylinder on which the pedal acts.

With respect to known disconnection systems, they are represented by relatively complex mechanical systems, often demanding in terms of installation space. A disadvantage of these known disconnection systems is the fact that although the pedal is released in the event of a frontal collision of the vehicle, so that it is freely rotatable in its seat, the pedal thus released proceeds with the entire pedal assembly against the feet of the Hdič. This can also cause some injuries in the foot area. Moreover, these known disconnection systems usually represent a relatively complex installation in a vehicle.

The essence of the technical solution

These drawbacks are substantially eliminated in the pH pedal release device of the vehicle according to the invention, characterized in that a transmission arm is connected to the pivotally mounted pedal arm via an axial coupling arranged in the axis of rotation of the pedal arm, the axial coupling a pH compression spring and a release member are assigned.

The axial clutch is preferably formed by a tooth clutch, the first part of which is rigidly connected to the pedal arm and the second part to the transmission arm.

The release member is supported on the vehicle frame at a location which is farther from the impact location than the pivot point of the pedal arm. The disengagement member is provided with a wedge portion extending between the axial coupling parts for disengaging the axial coupling. The disengagement member is further provided with an abutment, abutting it with its pH side facing the driver's pedal arm when the axial clutch is disengaged by the disengagement member.

In the case of a frontal impact, the device according to the invention ensures not only the release of the pedal in its bearing, but also the tilting of the pedal away from the foot of the heater against the direction of the advancing deformation.

-1VZ, BO

Overview of the drawings

An exemplary embodiment of a pedal release device in a frontal collision of a vehicle is shown in the accompanying drawings, wherein FIG. 1 shows the pedal mounting area in a right perspective view; FIG. 2 shows a left perspective view; FIG. 3 a side view; 4 shows the device in the unfolded state and FIG. 5 shows the transmission pedal with the transmission arm.

Examples of embodiments of the invention

In the bracket 1, the pedal arm 5 and the transmission arm 6 are rotatably mounted on the axis 2, which transmits the movement of the pedal arm 5 to a control member (not shown), for example a brake booster, a master brake or clutch hydraulic cylinder. The pedal arm 5 is connected to the transmission arm 6 via an axial clutch 7 arranged in the axis of rotation of the pedal arm 5. The axial clutch 2, in this case a gear, is held in engagement by the pressure spring 4. In the present case, the pressure spring 4 is formed by a set of disc springs arranged on the axis 2. The axial coupling 7 may be represented by other than toothed clutches, eg pin, friction etc. Other pressure springs 4 may be used - eg helical coil springs,

The axial clutch 7 here has a first part 8 firmly connected, for example by welding, to the pedal arm 5, and a second part 9 again for example by welding, firmly connected to the transmission arm 6. In the present case, it is firmly connected to the pedal arm 5, eg also by welding a housing 3 by means of which the welded assembly is rotatably mounted on the axis 2.

An axial clutch 7 is associated with a decoupling member 10 which is mounted on the bracket 1 and is fitted with mounting clearance to the vehicle frame 12 at a location which is farther from the frontal impact location of the vehicle than the pivot axis 2 of the pedal arm 5. The disengagement member 10 has a wedge portion that extends into the region between the axial coupling portions 8, 9. The disengagement member 10 can also be attached to the vehicle frame 12 and then need not be mounted on the bracket 1.

When actuating the pedal, its arm 5 rotates in the respective direction. This movement is transmitted via the axial clutch 7 to the transmission arm 6 and this acts on the respective actuator (not shown), the brake booster, the master brake and clutch cylinder, etc.

In the event of a frontal collision of the vehicle, the pedal assembly formed by the parts i-9 is displaced in the direction of progressive deformation, ie towards the rear of the vehicle. During this movement, contact occurs with the disconnecting member 10, which remains on the frame 12 of the vehicle remains stationary for longer. The contact takes place in such a way that the wedge-shaped part of the disengagement member 10 penetrates between the parts 8, 9 of the axial coupling 7 and moves the two parts 8, 9 of the axial coupling 7 apart from the pressure spring 4.

This disengages the axial clutch 7, which means that the pedal arm 5 is released on the axis 2 and is freely rotatable thereon. In this state, the pedal arm 5 is supported with its side facing the driver on the abutment member 10 of the release member 10, thereby causing the pedal arm 5 to tilt away from the driver ' s feet against the direction of the progressive deformation.

Claims (5)

PATENT CLAIMS 1. A pedal release device in a frontal impact of a vehicle, characterized in that a transmission arm (6) is connected to the rotatably mounted pedal arm (5) via an axial clutch (7) arranged in the axis of rotation of the pedal arm (5), a pressure spring (4) and an uncoupling member (10) are associated with the axial coupling (7). io Device according to claim 1, characterized in that the axial clutch (7) is formed by a tooth clutch, the first part (8) of which is fixedly connected to the pedal arm (5) and the second part (9) to the transmission arm (6). Device according to claim 1 or 2, characterized in that the disconnecting member (10) is supported on the vehicle frame (12) at a location which is farther from the frontal impact location of the vehicle than the pivot point of the pedal arm (5). Device according to claim 1 or 2, characterized in that the disconnecting member (10) is provided with a wedge-shaped part extending between the parts (8,9) of the axial coupling (7). Device according to any one of the preceding claims, characterized in that the release member (10) is provided with a support (11) on which the pedal arm (5) faces when the axial clutch (7) is disengaged by the release member (11). 10).