DE102021005953A1 - Foot pedestal with height-adjustable step plate for driving a vehicle - Google Patents

Abstract

The invention relates to a foot pedestal with a height-adjustable step plate for driving a vehicle, the foot pedestal having at least one step plate, an electric drive and a base plate. The invention is based on the object of developing a foot pedestal with a height-adjustable step plate for driving a rail vehicle that can be operated autonomously , whose footplate can be smoothly moved, locked and loaded throughout the entire lifting and lowering movement and can also be extended again from the lowest position without any problems articulated three-point mounting is carried out, - whereby between the footplate and the base plate (1; 2) there are two parallel supporting levers (3; 4) which each have an upper and a lower bearing (8; 9) and the upper Bearing (8) on one between the support levers (3; 4) fasten gten connecting bolt (5) is arranged, on which a receptacle (11) for the upper attachment point (12) of a gas pressure spring (7) or a threaded spindle (60) of an electric drive (41) is arranged and the gas pressure spring or threaded spindle (60) as has a further bearing (13) at the lower fastening point, which rests on the base plate (2) via brackets (39; 40), with both support levers (3; 4) having a further connecting bolt (10) connecting them at their respective upper ends, on which at least one roller (14) is fastened, which is guided in a supporting manner on the underside of the treadle (1),- with in the lower area of both carrying levers (3; 4) one element each as a fixed point (15; 16) - when using a gas pressure spring (7) - is arranged for one torsion spring (17; 18) each, whereby this is guided on a bolt (19) arranged in the lower bearing, which is held on both sides via brackets (34; 35; 36; 36; 37) on at least two spacers (20; 21) seated on the base plate (2), the spacers (20; 21) serving as a second fixed point for the torsion springs (17; 18) and - when using an electric drive ( 41) with a threaded spindle (60) - a limit switch (57; 58) each with a lever (59) are arranged, - the footplate (1) in its upper area being offset on both sides by 90° and on one side in a U-shaped guide (22; 23) running respective structure (24; 25) is vertically movably guided.

Description

The invention relates to a foot pedestal with a height-adjustable step plate for driving a vehicle, the foot pedestal having at least one step plate, an electric drive and a floor plate.

A driver's seat which is height-adjustable in order to accommodate the different sizes of the locomotive drivers is usually used on a rail vehicle. For this purpose, a footrest is used, which is also height-adjustable, so that the vehicle driver can put his feet down and, if necessary, press pedals by foot, which can be attached to the footplate.

From the EP 1 375 288 B1 a height-adjustable pedestal is known in which a sliding carriage is supported vertically against a base and can be adjusted in the vertical direction using a gas pressure spring via a foot pedal.

the EP 3 065 990 B1 describes a foot pedestal with a pivoted foot settling element, which is supported on its underside on a gas pressure spring and has a mechanically operable locking device with a spring-loaded locking element.

Other writings on the state of the art are the German utility model DE 29 813 118 U1 and the US patent application US 2012/0 112 035 A1 .

From the DE 10 2012 216 561 B3 height-adjustable footrest for a rail vehicle is known. The footrest has a first housing part, which serves as a base housing, and a second housing part, which serves as a receiving housing for a drive device having an electric drive and a threaded shaft, and a third housing part, which serves as a cover housing.

Also known is an adjustable footrest for train drivers or tram drivers with a pedestal, frame or frame and a pivotably guided lifting or lowering unit that is coupled to a drive, with two pivotally guided joints, which consist of lower and upper arms interacting like a parallelogram ( PL 225 552 B1 ). A similar principle is also from the PL 225 516 B1 and the PL 225 463 B1 known.

Also the PL 218 034 B1 describes a height-adjustable foot pedestal for the driver's cab of rail vehicles.

• eine höhenverstellbare Podestplattform, eine Federeinheit, welche eine Federkraft gemäß einer entsprechenden Federkennlinie bereitstellt und einen Hebelmechanismus, welcher zwischen der Federeinheit und der Podestplattform derart zwischengeschaltet ist, dass die Federkraft durch den Hebelmechanismus auf die Podestplattform auf eine solche Weise übertragen wird, dass eine Hubkraft bereitgestellt wird, welche der Gewichtskraft der Podestplattform entgegenwirkt, um die Höhenverstellung der Podestplattform zu erleichtern.

the EP 2 637 894 B1 , the DE 20 2016 004 888 U1 and the CN 1 07 901 928 A describe a height-adjustable platform that includes:

• a height-adjustable pedestal platform, a spring unit which provides a spring force according to a corresponding spring characteristic and a lever mechanism which is interposed between the spring unit and the pedestal platform in such a way that the spring force is transmitted through the lever mechanism to the pedestal platform in such a way that a lifting force is provided is, which counteracts the weight of the pedestal platform in order to facilitate the height adjustment of the pedestal platform.

Furthermore, from the DE 10 2018 207 035 A1 and the CN 1 09 278779 A a modular foot pedestal is known, the foot pedestal having at least one base frame which has a height adjustment mechanism, an intermediate frame mounted on a base frame, a gas pressure spring and a footboard.

The gas pressure springs used in various constructions are almost horizontally retracted in the lowest position of the foot pedestal. Due to the construction used, the foot pedestals can only be extended from this position in a very complicated manner and often get jammed. For smaller people, this poses a significant problem in terms of handling the foot pedestals.

• • sie sind oftmals nicht autonom betreibbar, sondern erfordern fahrzeugseitige Leitungen zur Versorgung / Steuerung,
• • sie sind nicht ausreichend belastbar,
• • sie sind teuer in der Herstellung,
• • sie erfordern eine große Teilevielfalt,
• • sie sind aufwendig zu warten,
• • sie erfordern vertikale Führungen, wodurch sich die für den Fahrer verfügbare Fläche der Trittplatte dadurch verringert
• • sie sind nur mit viel Krafteinwirkungen absenkbar, also für Frauen oftmals ungeeignet und
• • sie sind - insbesondere als Scherenkonstruktionen - anfällig gegen unterhalb der Trittplatte anfallenden Verschmutzungen sowie gegen niedrige Temperaturen < 9°C.

The known comparable devices have the following disadvantages:

• • they often cannot be operated autonomously, but require on-board lines for supply / control,
• • they are not sufficiently resilient,
• • they are expensive to produce,
• • they require a large variety of parts,
• • they are difficult to maintain,
• • They require vertical guides, thereby reducing the treadplate area available to the rider
• • They can only be lowered with a lot of force, so they are often unsuitable for women and
• • They are - especially as scissor constructions - susceptible to dirt accumulating underneath the step plate as well as to low temperatures < 9°C.

The invention is based on the object of providing a foot pedestal with a height-adjustable step plate for driving a rail vehicle that can be operated autonomously, whose footplate can be smoothly moved, locked and loaded during the entire lifting and lowering movement and can be easily extended again from the lowest position without any signs of jamming.

• - wobei zwischen der Tritt- und der Bodenplatte (1;2) zwei parallel angeordnete Traghebel (3; 4) befindlich sind, die jeweils ein oberes sowie ein unteres Lager (8;9) aufweisen und das obere Lager (8) auf einen zwischen den Traghebeln (3; 4) befestigten Verbindungsbolzen (5) angeordnet ist, an dem eine Aufnahme (11) für den oberen Befestigungspunkt (12) einer Gasdruckfeder (7) oder einer Gewindespindel (60) eines elektrischen Antriebs (41) angeordnet ist und die Gasdruckfeder oder Gewindespindel (60) als unteren Befestigungspunkt ein weiteres Lager (13) aufweist, welches auf der Bodenplatte (2) über Halterungen (39;40) aufsitzt,
• - wobei beide Traghebel (3;4) an ihren jeweiligen oberen Enden einen sie verbindenden weiteren Verbindungsbolzen (10) aufweisen, an dem mindestens eine Rolle (14) befestigt ist, die an der Unterseite der Trittplatte (1) stützend geführt ist,
• - wobei im unteren Bereich beider Traghebel (3;4) jeweils ein Element als Festpunkt (15; 16) - bei der Verwendung einer Gasdruckfeder (7) - für jeweils eine Torsionsfeder (17; 18) angeordnet ist, wobei diese auf einem im unteren Lager angeordneten Bolzen (19) geführt ist, der beidseitig über Halterungen (34; 35; 36; 36; 37) auf mindestens zwei auf der Bodenplatte (2) aufsitzenden Distanzstücken (20; 21) befestigt ist, wobei die Distanzstücken (20; 21) als zweiter Festpunkt für die Torsionsfedern (17; 18) dient und - bei Verwendung eines elektrischen Antriebs (41) mit einer Gewindespindel (60) - jeweils ein Endlagenschalter (57; 58) mit jeweils einem Hebel (59) angeordnet sind,
• - wobei die Trittplatte (1) in ihrem oberen Bereich beidseitig in einer jeweils um 90° versetzten und auf einer Seite in einer U-förmigen Führung (22;23) laufenden jeweiligen Konstruktion (24;25) vertikal beweglich geführt ist.

According to the invention, this is achieved in that the height adjustment of the step plate (1) of the foot pedestal is designed as an articulated three-point bearing,

• - Wherein between the step and the base plate (1; 2) two parallel support levers (3; 4) are located, each having an upper and a lower bearing (8; 9) and the upper bearing (8) on a between connecting bolt (5) attached to the support levers (3; 4), on which a receptacle (11) for the upper attachment point (12) of a gas pressure spring (7) or a threaded spindle (60) of an electric drive (41) is arranged and the Gas pressure spring or threaded spindle (60) has a further bearing (13) as the lower fastening point, which rests on the base plate (2) via brackets (39; 40),
• - the two carrying levers (3; 4) having at their respective upper ends a further connecting bolt (10) which connects them and on which at least one roller (14) is fastened, which is guided in a supporting manner on the underside of the treadle (1),
• - in the lower area of both support levers (3; 4) one element is arranged as a fixed point (15; 16) - when using a gas pressure spring (7) - for each torsion spring (17; 18), this being on a lower bolt (19) arranged in a bearing, which is fastened on both sides via brackets (34; 35; 36; 36; 37) to at least two spacers (20; 21) seated on the base plate (2), the spacers (20; 21 ) serves as a second fixed point for the torsion springs (17; 18) and - when using an electric drive (41) with a threaded spindle (60) - a limit switch (57; 58) each with a lever (59) are arranged,
• - wherein the tread plate (1) is vertically movably guided in its upper area on both sides in a respective structure (24; 25) offset by 90° and running on one side in a U-shaped guide (22; 23).

The three-point bearing is designed in such a way that the distance between the upper and lower bearing of the two support levers and between the lower bearing of the two support levers and the lower attachment point (pivot point) of the gas pressure spring or the threaded spindle has a ratio of <8 to 1 . This ratio remains the same in all positions of the treadle. The upper bearing executes an arc of a circle in its upward and downward movement.
A triangle is formed via the three-point bearing.
The inventive design of the three-point bearing means that the treadle from its lower position, with an almost horizontal position of the gas pressure spring or the threaded spindle with electric drive in the retracted state is easily and completely problem-free to extend.
The gear and the spindle wheel are integrated in one housing.
An extension tube accommodating the threaded spindle is fastened to the housing with a joint eye, the joint eye having a bore.

The structure used to vertically guide the treadle is attached to a rear wall.

• • das Fußpodest ist autonom betreibbar, mit 100 kg belastbar und die Trittplatte ist stufenlos höhenverstell- und arretierbar,
• • das gesamte Fußpodest ist einfach aufgebaut und hat ein geringes Gewicht,
• • die Konstruktion ist wartungsfrei,
• • der Einfahr- und Ausfahrmechanismus ist aufgrund der Dreigelenk-Lagerung leichtgängig,
• • die Konstruktion ist preiswert und weist wenige Bauteile auf,
• • die Konstruktion ist wenig empfindlich gegen Verschmutzungen,
• • die Hub-Konstruktion ist sehr sicher und stabil vertikal geführt
• • sie ist unempfindlich gegen niedrige Temperaturen.

The solution according to the invention has the following advantages:

• • the foot pedestal can be operated independently, can be loaded with 100 kg and the step plate can be infinitely adjusted in height and locked,
• • the entire foot pedestal has a simple structure and is light in weight,
• • the construction is maintenance-free,
• • the retraction and extension mechanism is smooth-running due to the three-joint bearing,
• • the construction is inexpensive and has few components,
• • the construction is less sensitive to dirt,
• • the lifting construction is very safe and stable vertically
• • it is insensitive to low temperatures.

character list

The invention will be explained in more detail below using an exemplary embodiment.

• 1 - die Vorrichtung unter Verwendung einer Gasdruckfeder in 3D-Darstellung im ausgefahrenen Zustand
• 2 - die Vorrichtung unter Verwendung einer Gasdruckfeder in der Seitenansicht im ausgefahrenen Zustand
• 3 - die Vorrichtung unter Verwendung einer Gasdruckfeder in 3D-Ansicht im eingefahrenen Zustand
• 4 - die Vorrichtung unter Verwendung eines elektrischen Antriebs mit Gewindespindel in der Seitenansicht im ausgefahrenen Zustand
• 5 - den elektrischen Antrieb mit seinen Bauteilen in der Seitenansicht

It shows:

• 1 - The device using a gas pressure spring in 3D representation in the extended state
• 2 - The device using a gas pressure spring in the side view in the extended state
• 3 - the device using a gas spring in 3D view in the retracted state
• 4 - The device using an electric drive with threaded spindle in the side view in the extended state
• 5 - the electric drive with its components in side view

the 1 until 3 show the foot pedestal with its tread plate 1, the angle elements 32; 33 and the base plate 2. Between the footplate 1 and the base plate 2 are two support levers 3; 4 arranged, each having an upper and a lower bearing 8; 9 have.

The lower bearing 9 has a connecting bolt 5 which has brackets 35; 36; 37; 38 on the spacers 20; 21 is attached.

Attached to the connecting bolt 5, which also acts as the upper bearing 8, is the receptacle 11, into which the upper attachment point 12 of the gas pressure spring 7 or the threaded spindle 60 is integrated ( 2 ). The gas pressure spring 7 or the threaded spindle 60 have the lower attachment point on the bearing 13, which via the brackets 39; 40 is attached to the base plate 2.

The two support levers 3; 4 have at their respective upper ends the connecting bolt 10, to which at least one roller 14 is attached, which is guided on the underside of the footplate 1 in a supportive manner.

The stepping plate 1 is guided in its upper region on both sides in a structure 24; 25 that is offset by 90° and runs on one side in a U-shaped guide 22; 23;

The three-point bearing according to the invention is designed in such a way that the distance between the upper and the lower bearing 8; 9 of the two supporting levers 3; 4 and between the lower bearing 9 of the two support levers 3; 4 and the lower attachment point/bearing 13 of the gas pressure spring or the threaded spindle 7 has a ratio of <8 to 1. This very special design is the only way to ensure that the gas pressure spring 7 or the threaded spindle 60 can be moved from the lower position ( 3 ) can be brought back up again without any special expenditure. The upper bearing 8 of the support lever 8; 9 performs a circular path. The construction 24; 25, which is offset by 90°, then slides in the respective U-shaped guide 22; 23, guided in a stable manner, upwards.

The three-point bearing according to the invention acts in the form of a triangle, which ensures that the three bearings are always at the same distance from one another when the foot pedestal moves up and down.

This construction, in turn, ensures a great deal of stability against lateral torsion and very easy upward and downward movement of the foot pedestal, even for women.

The structure 24 used for the vertical guidance of the treadle 1; 25 is attached to the rear wall 31.

The footplate 1 has at least one stop 6 at its lower end.

When using an electric drive 41 ( 4 and 5 ) with threaded spindle 60 instead of the gas lift spring 7, the overall construction remains almost unchanged, with the torsion springs 17; 18 can be omitted. The trigger 28 with spring 26, recording 29 and Bowden cable 30 can then be omitted.

The electric drive 41 with the threaded spindle 60 has an electric motor 42 which is connected to the threaded spindle 60 via a gear 43 and a spindle wheel 46 .

The gear 43 and the spindle wheel 46 are integrated in a housing 50 .

A joint eye 55 accommodating the threaded spindle 60 and having the bore 56 is fastened to the housing 50 .

Reference List

1

kick plate

2

bottom plate

3

support lever

4

support lever

5

connecting bolts

6

attack

7

lead screw

8th

upper camp

9

lower bearing

10

connecting bolts

11

recording

12

upper attachment point

13

lower attachment point / bearing

14

role

15

fixed point

16

fixed point

17

torsion spring

18

torsion spring

19

bolt

20

spacer

21

spacer

22

U-shaped guide

23

U-shaped guide

24

construction

25

construction

26

Feather

27

free

28

trigger

29

recording

30

bowden cable

31

back panel

32

free

33

free

35

bracket

36

bracket

37

bracket

38

bracket

39

bracket

40

bracket

41

electric drive

42

electric motor

43

transmission

44

free

45

free

46

spindle wheel

47

free

48

free

49

free

50

Housing

51

- free

52

free

53

free

54

extension tube

55

articulated eye

56

drilling

57

limit switches

58

limit switches

59

lever

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was 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.

Patent Literature Cited

• EP 1375288 B1 [0003]
• EP 3065990 B1 [0004]
• DE 29813118 U1 [0005]
• US 2012/0112035 A1 [0005]
• DE 102012216561 B3 [0006]
• PL 225552 B1 [0007]
• PL 225516 B1 [0007]
• PL 225463 B1 [0007]
• PL 218034 B1 [0008]
• EP 2637894 B1 [0009]
• DE 202016004888 U1 [0009]
• CN 107901928A [0009]
• DE 102018207035 A1 [0010]
• CN 109278779A [0010]

Claims (8)

Foot pedestal with a height-adjustable step plate for driving a vehicle, the foot pedestal having at least one step plate, a gas pressure spring and a base plate, characterized in that the height adjustment of the step plate (1) of the foot pedestal is designed as an articulated three-point bearing, - Wherein between the step and the base plate (1; 2) two parallel support levers (3; 4) are located, each having an upper and a lower bearing (8; 9) and the upper bearing (8) on a between is arranged on the connecting bolt (5) attached to the support levers (3; 4), on which a receptacle (11) for the upper attachment point (12) of a gas pressure spring (7) or a threaded spindle (60) of an electric drive (41) is arranged and the Gas pressure spring or threaded spindle (60) has a further bearing (13) as the lower fastening point, which rests on the base plate (2) via brackets (39; 40), - wherein both support levers (3; 4) have at their respective upper ends a further connecting bolt (10) connecting them, to which at least one roller (14) is fastened, which is guided in a supporting manner on the underside of the treadle (1), - in the lower area of both support levers (3; 4) one element is arranged as a fixed point (15; 16) - when using a gas pressure spring (7) - for each torsion spring (17; 18), this being on a lower bolt (19) arranged in a bearing, which is fastened on both sides via brackets (34; 35; 36; 36; 37) to at least two spacers (20; 21) seated on the base plate (2), the spacers (20; 21 ) as a second fixed point for the torsion springs (17; 18) and - when using an electric drive (41) with a threaded spindle (60) - a limit switch (57; 58) each with a lever (59) are arranged, - wherein the tread plate (1) is vertically movably guided in its upper area on both sides in a respective structure (24; 25) offset by 90° and running on one side in a U-shaped guide (22; 23). foot pedestal after claim 1 , characterized in that the three-point mounting is designed such that the distance between the upper and the lower bearing (8; 9) of the two support levers (3; 4) and between the lower bearing (9) of the two support levers (3; 4) and the lower attachment point/bearing (13) of the gas pressure spring (7) or the threaded spindle (60) has a ratio of <8 to 1. foot pedestal after claim 1 until 2 , characterized in that the three-point bearing is designed as a triangle. foot pedestal after claim 1 until 3 , characterized in that when using a gas pressure spring (7) for continuously locking the treadle (1) in different positions, the treadle (1) has an articulated trigger (28) with a spring (26) which has a receptacle ( 29) for a Bowden cable (30), the Bowden cable (30) being attached at its other end to the release head of the gas pressure spring (7). foot pedestal after claim 1 until 3 , characterized in that when using an electric drive (41) this has an electric motor (42) via a gear (43) and a spindle wheel (46) with the threaded spindle (60) is connected. foot pedestal after claim 1 until 3 and 5 , characterized in that the electric motor (42), the gear (43) and the spindle wheel (46) are integrated in a housing (50). foot pedestal after claim 1 until 3 and 5 and 6, characterized in that an extension tube (54) accommodating the threaded spindle (60) is fastened to the housing (50) with a joint eye (55), the joint eye (55) having a bore (56). foot pedestal after claim 1 until 7 , characterized in that the respective construction (U-shaped guide) (22; 23) used for the vertical guidance of the tread plate (1) is fastened to a rear wall (31).

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