DE102015204236A1 - Pedal with adaptive force feedback and worm drive - Google Patents

Abstract

A pedal (3) with adaptive force feedback is presented, wherein the pedal (3) wherein the pedal has a pedal lever (34) and acts on the pedal lever, a plunger (11), wherein between the plunger and a counter-stop (22), a return spring ( F1) is arranged biased. The counter-stop (22) is adjustable via a self-locking worm drive (5) in its position over a predetermined adjustment path. Plunger and tooth row can be designed so that a pure linear movement takes place or be rotatable with respect to a rotation axis.

Description

The invention relates to a pedal with adaptive force feedback according to the preamble of claim 1.

Pedals in vehicles, in particular the gas pedal, are increasingly provided with an actuator to the driver of the vehicle, a visually perceptible signal in certain traffic situations, such as falling below a minimum distance or a pending gear change or an uneconomic driving style, such as deviating from an optimal speed or torque range signal.

These are pedals with adaptive force feedback, so-called "force feedback pedals", such as in the EP 1375233 B1 or DE 10 2009 041 361 A1 , Usually provided with actuators, which operate on the basis of rotating electric motors or electromagnetic linear actuators. Such actuators allow targeted control of the drag characteristic, but are correspondingly expensive, expensive and have a significant power consumption.

The object of the present invention is to present an alternative pedal, which is inexpensive to implement. This object is solved by the features of the independent claims. Advantageous developments of the invention will become apparent from the dependent claims, and combinations and developments of individual features are conceivable with each other.

An essential idea of the invention is that the counter-stop for the return spring via a self-locking worm drive in its position over a predetermined adjustment path is adjustable. Due to the self-locking of the worm drive, the required restoring force can be applied at any time, but by adjusting the worm drive the position of the stop but just changed accordingly.

In one embodiment, while the plunger is guided in a straight line. The counter-stop is arranged in a direction of adjustment, that is, in this case, a straight row of teeth, at least one tooth being in engagement with the worm drive.

Alternatively, in another embodiment, the plunger on a first lever element and the counter-stop for the return spring on a second lever element are each arranged rotatable about a common axis of rotation.

On the second lever element, a row of teeth is arranged in an arc shape, wherein in turn at least one tooth is in engagement with the worm drive.

The invention will be explained in more detail by means of embodiments with reference to the figures.

1 shows first the design with the lever elements 1 and 2 arranged rotatably on a common axis of rotation 23 , which also the axis of rotation for the pedal lever 34 can not, but does not have to be.

Between the first lever element 1 and the second lever member 2 At least the first return spring (F1) is arranged, wherein as a counter-stop for the return spring F1 on the lever element 2 a corresponding stop 22 is designed.

At the first lever element ( 1 ) is the plunger ( 11 ) as the contact area to the pedal lever ( 34 ) and is the plunger 11 preferably via the return spring F1 always in contact with the pedal lever 34 held. About the teeth of the worm drive, the tension is maintained and possibly. Increased or bwz by activation of the worm drive in the contact position. A desired tension can be traversed.

On the second lever element ( 2 ) is the row of teeth ( 25 ) Arc formally on the end face of the lever member 2 arranged, wherein at least one tooth in engagement with the worm gear ( 51 ) is located. The worm gear 51 gets over a shaft from the engine 52 driven in case of need, the shaft preferably on both sides of the worm drive 51 is mounted in plain bearings.

In the preferred embodiment shown here is also on the 2nd lever element 2 an attack 26 for the travel limit of the 1st lever element 1 and for recording this attack 26 on the 1st lever element 1 a corresponding recess 16 created.

The following 2 - 4 sketch an alternative, purely linear design, in which the plunger 11 is guided rectilinearly in a guide body, in which also the return spring F1 is arranged as a circumferential around the plunger coil spring and of the plunger 11 firmly connected stop 12 with the pestle 11 is moved. The counter-attack 22 for the return spring F1 is arranged with a row of teeth arranged in the adjustment direction 25 connected, in this embodiment, the row of teeth 25 is formed on the guide body. At least one tooth of the row of teeth 25 is in engagement with the worm drive ( 51 ).

As sketchy in 3 can be represented by force on the pedal lever 34 the pestle 11 are pressed into the guide body and it braces the return spring F1 continues to give the counter-attack 22 thanks to the self-locking effect of the worm drive 51 but not after.

However, about the engine 52 the worm drive 51 adjusted, the counter-attack can 22 in its position with respect to the pedal lever 34 changed and thus a different force characteristic can be realized.

In addition, on the ram 11 an attack 12 firmly connected, which also with relieved pedal lever 34 the return spring F1 holds in a defined bias and against the counter-stop 26 supported.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1375233 B1 [0003]
• DE 102009041361 A1 [0003]

Claims (4)

Pedal with adaptive force feedback, the pedal having a pedal lever ( 34 ), on the pedal lever a plunger ( 11 ), wherein between plunger and a counter stop ( 22 ) a biasing spring (F1) is arranged biased, characterized in that the counter-stop (F1) 22 ) via a self-locking worm drive ( 5 ) is adjustable in its position over a predetermined adjustment path. Pedal according to claim 1, characterized in that the plunger ( 11 ) is guided in a straight line and the counter-attack ( 22 ) with a row of teeth arranged in the adjustment direction ( 25 ), wherein at least one tooth in engagement with the worm drive ( 51 ) is located. Pedal according to claim 1, characterized in that a first lever element and a separate second lever element on a common axis of rotation ( 23 ) are provided, between the first lever element and the second lever element at least the first return spring (F1) is arranged and b) on the first lever element ( 1 ) the plunger ( 11 ) as the contact area to the pedal lever ( 34 ) is formed, and c) on the second lever element ( 2 ) the row of teeth ( 25 ), wherein at least one tooth is in engagement with the worm drive ( 51 ) is located. Vehicle with a pedal according to one of the preceding claims.

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