EP1272909B1 - Adjustable pedal unit - Google Patents

Abstract

A pedal unit including a four-bar parallelogram is made up of an upper retainer piece, a lower retainer bracket, with footplate attached and two roughly parallel arms, which are each rotatably mounted at one end on the upper retainer piece and at the other end on the lower retainer bracket. The pedal unit may rotate about a main bearing. An adjuster device for the adjustment of the footplate, predominantly in the X-direction, is provided. The upper retainer piece and a sliding block are mounted on a guide pinion in a displaceable and adjustable manner. A rod bearing is arranged on the guide pinion, whereas the main bearing is arranged on the sliding block and a main bearing tie and a rod bearing tie are provided, one end of each being rotatably connected to a solid bearing block and the other free end rotatably mounted in the main bearing or the rod bearing. A longitudinally adjustable strut is mounted between the arms with both ends rotatably connected to the above arms.

Description

The invention relates to a pedal mechanism according to the preamble of patent claim 1.

To the operation of pedals, for example in the motor vehicle, the different size of drivers and thus the different location be able to adapt to the optimum force application point for the driver, a pedal mechanism must be adjustable in the direction of travel (X) and / or in height (Z) be. This can also be an adaptation of the pedals to different Proportions and sitting habits of the drivers take place.

In the prior art known solutions for adjustable Pedalwerke allow an adjustment of the pedal almost infinitely along a defined, usually arcuate path.

From JP 71 91 773 the pedal described above is known. However, this has the disadvantage that the adjustment in the X direction on a Orbit taken with the radius of the distance from the Force introduction point is formed to the main camp, and that also the Main bearing through the arrangement on one opposite the body Fixed support is fixed in position. The adjustment is thereby causes the driven by the web mounted actuator motor Spindle presses on the extended end of the lever, causing the Four-joint gearbox rotates counterclockwise around the pivot bearing. This causes the thrust bearing also in the clockwise direction around the Swivel bearing is pivoted. The main camp is fixed, as the Bearing shaft is articulated on the fixed bearing block. Another Disadvantage is the fact that there is no positive connection between the threaded rod and the lever end are. Besides, this is just an adjustment substantially realized in the X direction, so that the adjustable by the adjustment points for the pressure point along a with the radius around the main bearing completed pivoting movement lie. The demand of the automobile industry, that the angular position of the Push rod in the adjustment only a very tight Angle range may change, can not be met with this arrangement.

From EP 0 936 527 A2 there is an adjustable pedal arrangement for automobiles with an auxiliary lever which is pivotally mounted on a front shaft and is moved by a pedal lever, which is on a rear shaft, behind and is arranged below the front shaft, is pivotally mounted. Auxiliary lever and pedal lever are connected by an adjustable rod, the is arranged substantially parallel to the plane in which the front and the rear shaft lie. The auxiliary lever and the pedal lever form with the adjustable rod a parallelogram, whose formed by the rod Side adjustable in length to the output angular position of the footboard, the lower end of the pedal lever is attached to change. With the Auxiliary lever is an operating rod for a brake or a clutch connected, which is moved by the forward movement of the tread plate. This is by means of the pedal lever and the adjustable rod of the Auxiliary lever moves, which moves the actuating rod (push rod). The Changing the angle of attack of the footboard allows a larger Variation of the tread plate position, without the height arrangement of the tread plate to raise excessively, since the parallelogram arrangement the pedal travel in essentially unchanged.

From US-A 3,151,499 a pedal described at the outset is known. In this Pedalwerk is the upper holding part with an integrated Plunger bearing by a spring around the main bearing counterclockwise to Pivoted to a body-mounted stopper. One of the levers that is hinged at one end to the main bearing, is opposed by a Body supported, variable length spindle against the Swiveling clockwise. As a result, the lower headband and thus the Tread plate on a circular arc mainly in the X direction to the rear and adjusted at the same time in the Z direction approximately downwards. An independent height adjustment The pedal in Z-direction is not possible with this Pedalwerk.

The technical problem underlying the invention is a Pedalwerk propose, in which the tread plate in an area that in a horizontal and vertical extent covering any point, is adjustable and adjustable to the force introduction angle Treadplate employment a possible horizontal trajectory of the tread plate enabled on actuation. This problem is caused by a pedal mechanism according to Claim 1 solved.

An embodiment in which the adjusting device for the tread plate by a threaded rod is formed, which is caradan on both thighs stored nuts interspersed and engaged with the two nuts each having an opposing rising thread, has the advantage that it is in Simple way allows the four-bar linkage by bracing to change. As a result, an adjustability of the tread plate in or against the Direction of travel (positive or negative X direction) possible.

An embodiment with integrated in the guide rocker Threaded rod with the upper holding part and the slide block with opposing rising threads engaged, has the advantage that with it an adjustment of the parts shifted in the vertical direction (Z direction), Holding part or slide block is made possible in a simple manner.

An embodiment in which the slopes of the legal and the Linksgewindees each other in proportion to the transmission ratio stand, has the advantage that due to the different gradients the Change of the distance between pressure point and main bearing to one corresponding change in the distance between main and push rod bearings can be implemented so that the gear ratio also at Adjustment of the tread plate is maintained. This will be done in an advantageous manner ensures that the same force on the footboard an equal Abtriebskraft on the ram bearing is effective. The retention of the In addition, the high position of the pushrod bearing allows the angular position of the Push rod functional to maintain almost unchanged.

An embodiment in which the upper holding part and the Gleitklotz over a cable and a reversing gear are connected to each other, make a Alternative for balancing the lever arm lengths according to the Gear ratio. The formation of the deflection in the manner of a Pulley provides a simple way to customize Consideration of the gear ratio.

If the X-direction rear leg is slightly longer than the front, is at an adjustment of the pedal in the -X direction of the headband and thus the attached tread plate pivoted slightly counterclockwise, so that a + Z-direction pointing motion coordinate is compensated and the Tread plate is adjusted on a nearly horizontal path.

An embodiment in which the lengths of the two coupling are correspondingly large, the altitude of the largely horizontal Path, in which the line of action of the pressure point C runs when actuated, after Requirement be lowered.

An embodiment in which at least one of the threaded rods for the Adjustment in the X and Z directions is driven by a motor, has the advantage that the setting in a simple way from the control panel by corresponding control signals can be initiated.

The adjustability of the pedal mechanism according to the invention allows it in Appropriately, the connection of the pedal works of the in case of a crash decouple from deformation-prone bulkhead and connectivity instead to do this at crash-independent cross struts.

An embodiment in which the Pedalwerk an adjustable footrest is provided, in their adjustability of the position of the tread plate adapted accordingly, has the advantage that the driver depending on the setting the treadplate finds an ergonomically favorable support for the foot, so that when adjusting the footboard unfavorable fatigue or Cramping is avoided.

Fig. 1

das Pedalwerk in Grundstellung in perspektivischer Darstellung;

Fig. 2

das Pedalwerk schematisch in einer Seitenansicht;

Fig. 3

das Pedalwerk in Seitenansicht in Grundstellung und nach Betätigung;

Fig. 4

das Pedalwerk nach Verstellung in negativer X-Richtung (-X);

Fig. 5

das Pedalwerk in Seitenansicht in gegenüber der Grundstellung in negativer Z-Richtung (-Z) verstellter Lage;

Fig. 6

das Pedalwerk in Seitenansicht in gegenüber der Grundstellung in -X und -Z verstellter Lage;

Fig. 7

das Pedalwerk in -X verstellt mit Ausgleich des Übersetzungsverhältnis;

Fig. 8

das Pedalwerk in -Z verstellt mit Ausgleich des Hebelübersetzungsverhältnis;

Fig. 9

das Pedalwerk in -X und -Z verstellt mit Ausgleich des Übersetzungsverhältnis und

Fig. 10

Prinzipskizze einer Pedallagerung.

The above-mentioned and other advantages will become apparent in the description of an embodiment shown in the accompanying drawings. It shows

Fig. 1

the pedal mechanism in basic position in perspective view;

Fig. 2

the Pedalwerk schematically in a side view;

Fig. 3

the pedal mechanism in side view in basic position and after actuation;

Fig. 4

the pedal mechanism after adjustment in negative X-direction (-X);

Fig. 5

the pedal mechanism in side view in relation to the basic position in the negative Z direction (-Z) adjusted position;

Fig. 6

the pedal mechanism in side view in relation to the basic position in -X and -Z adjusted position;

Fig. 7

the pedal mechanism in -X adjusted with compensation of the gear ratio;

Fig. 8

the pedal mechanism in -Z adjusted with compensation of the leverage ratio;

Fig. 9

the pedal mechanism in -X and -Z adjusted with compensation of the gear ratio and

Fig. 10

Schematic diagram of a pedal storage.

In Fig. 1, the items of the illustrated as an embodiment Pedalwerk well recognizable in their functional interaction. Clearly visible is the fixed bearing block 1 with the fixed bearings of Main bearing and push rod coupling and the rotatable in one end mounted main bearing coupling 3 and the plunger bearing coupling 4, wherein the other End of the main bearing pad 3 in a trained in a slide block 5 Main bearing B rotatable and the other free end of the plunger bearing coupling 4 in one formed on the guide rocker 6 ram bearing A rotatable is stored. At the guide rocker 6, the slide block 5 and the Support carriage 8 slidably mounted in the Z direction. In the guide swing 6, a threaded spindle 7 is arranged, which with a toothing of the Holding carriage 8 and the Gleitklotzes 5 is engaged.

Of the slidably mounted on the guide rocker 6 holding carriage. 8 are approximately parallel to each other two legs 9, 10 articulated, with their other end are hinged to the bracket 11. The holding slide 8, the two legs 9, 10 and the headband 11 form a four-bar parallelogram. On the bracket 11, the tread plate 12 is attached. In the two legs 9, 10 are each a mother caradan, the Nuts are penetrated by a threaded rod 13. In the ram bearing A, the forms the output point of the pedal mechanism is a push rod 14, for example, for a brake booster, rotatably mounted.

In Fig. 2, in which the pedal mechanism in a basic position in side view is shown schematically, the main bearing B and the force application or pressure point C and the output point A, which is located in the plunger bearing, individually characterized. The actuating force F forms the horizontal to the Force introduction angle α. The tread plate has one opposite the horizontal one Angle of attack β. Starting from the pressure point C is a rectangular area hatched representing the coordinates of the provided adjustability of the pedal mechanism in -Z and -X direction outlines. In addition, horizontal Traces a, b and c drawn, the trajectories of the pressure point C (a) the ram bearing (b) and the tread plate with different coupling geometry (c) suggest.

In Fig. 3 is a dash-dotted representation of the pedal unit in basic position and in solid lines, the pedal mechanism after operation in the X direction shown. It can be clearly seen that the tread plate 12 in the Actuation has moved approximately on a horizontal path and that the Retainer with the foot plate mounted slightly counterclockwise was panned. Furthermore, it can be seen that the main bearing something in -Z direction on a pivoting track around the articulation of the main bearing pad on the bearing block in -Z has moved. The ram bearing A is on one almost horizontal track in the X direction on a swivel path around the articulation of Rammer bearing coupling on the bearing block has been pivoted in the X direction.

In Fig. 4, the pedal bearing in a -X from C to C 'adjusted position and in Fig. 5 in after adjustment in -Z direction in from C to C 'adjusted position shown. In Fig. 6, the position of the pedal mechanism after adjustment in -X and -Z represented from C to C '. In all three figures of Fig. 4 to Fig. 6 is the Position after adjustment without compensation of the leverage ratio shown. The leverage ratio ü is defined by the Ratio of lever lengths CB / BA. A compensation of the Lever gear ratio ü causes this Lever ratio is maintained even after adjustment.

The effect context for the compensation of the Lever transmission ratio is based on the illustration in FIGS. 7 to Fig.9 illustrates.

In Fig. 7 it can be seen that in an adjustment of the tread plate after -X the main bearing B shifts slightly upwards. After an adjustment in -Z, how it is shown in Fig. 8, the main bearing B is even clearer upward postponed. This shift of the main bearing B to B 'to compensate the leverage ratio ü at distribution of the tread plate in -X and -Z becomes very clear from the double representation in FIG. As the lever CB extended from C to C ', the lever length AB must also be extended be extended so that the ratio of the lever length C'B '/ B'A equal to CB / BA is. Since the height of the output point A in the ram bearing are not changed should, to compensate for the leverage ratio, the main bearing B are moved to B '. Hence the requirement that the Difference of the lever arm length from C 'to B' compared to CB to the difference of AB 'compared to AB proportional to the leverage ratio CB / BA changed.

The adjusting arrangement is designed so that during actuation of the Pedalwerk no adjustment is possible. After adjustment is the structure of Tread plate to Gleitklotz and thus from C to B to be regarded as rigid.

In Fig. 10 is a schematic diagram of the pedal mechanism in a Fig. 1 is largely shown comparable representation. A difference between the Illustrations in FIGS. 1 and 10 relate to the compensation of the Transmission ratio with adjustment in the Z direction, in Fig. 1 by a Threaded rod 7 with different slopes of the opposite direction rising threaded sections and in Fig. 10 by a cable 2 with Deflection and a gear, not shown, for example a Pulley, is made.

Claims (11)

1. A pedal mechanism, having
      a four-bar parallelogram which is formed from an upper holding part (8), a lower holding link (11) with footplate (12) attached thereto, and two legs (9, 10) which are arranged roughly parallel and are in each case mounted rotatably by one end on the upper holding part (8) and by the other end on the lower holding link (11), the pedal mechanism being pivotable about a main bearing (B),
      and an adjusting device for adjustment of the footplate (11), predominantly in the X direction, being provided,
   characterized in that the upper holding part (8) and a sliding block (5) with a main bearing (B) designed thereon are mounted displaceably and adjustably in the Z direction, and a length-adjustable strut (13) is provided between the legs (9, 10), which is mounted rotatably in these at both ends.
2. The pedal mechanism as claimed in claim 1, characterized in that the upper holding part (8) and the sliding block (5) are mounted on a guide rocker (6), and a main bearing connecting rod (3) and a pushrod bearing connecting rod (4) are provided, one end of which is in each case mounted rotatably on a stationary bearing block (1) and the other, free end of which is mounted rotatably in the main bearing (B) or in a pushrod bearing (A), the pushrod bearing (A) being designed on the guide rocker (6).
3. The pedal mechanism as claimed in claim 1 or 2, characterized in that the adjusting device for the footplate (12) is formed by a nut being mounted by cardan means on each of the two legs (9, 10) and a threaded rod (13) passing through the two nuts, the threaded rod (13) having an oppositely directed thread in each case in the engagement region with the two nuts.
4. The pedal mechanism as claimed in claim 2 or 3, characterized in that a threaded rod (7) integrated in the guide rocker (6) is arranged in such a manner that it is in engagement with toothings of the upper holding part (8) and of the sliding block (5), the threaded rod (7) having an oppositely directed thread in each case in the engagement region with the two parts.
5. The pedal mechanism as claimed in claim 3 or 4, characterized in that the pitches of the right-hand thread and of the left-hand thread are different and the ratio they bear to one another is the transmission ratio ü of the lever arms between a pressure point (C) on the footplate (12) and the main bearing (B) and between the main bearing (B) and the pushrod bearing (A).
6. The pedal mechanism as claimed in one of claims 1 to 5, characterized in that the upper holding part (8) and the sliding block (5) are connected via a cable pull (2) and a deflection mechanism.
7. The pedal mechanism as claimed in one of claims 1 , characterized in that the parts of the four-bar parallelogram are configured in such a manner that the adjustment of the pedal in the X direction runs along a horizontal path.
8. The pedal mechanism as claimed in one of claims 1 to 7, characterized in that the rear leg (10) in the X direction is slightly longer than the leg (9), both legs being articulated on a level on the upper holding part (8).
9. The pedal mechanism as claimed in one of claims 2 to 8, characterized in that the lengths of the two connecting rods (3, 4) of the kinematic linkage are configured in coordination with the bearing block (1) in such a manner that the line of action of the pressure point C runs in a predetermined height position and on a largely horizontal path on operation.
10. The pedal mechanism as claimed in one of claims 3 to 9, characterized in that at least one of the threaded rods (7, 13) for the adjustment in the X direction and the Z direction is motor-driven.
11. The pedal mechanism as claimed in one of claims 1 to 10, characterized in that a footrest is provided, which can be adjusted corresponding to the adjustment of the footplate.

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