EP1584312A1 - Motordriven wheelchair - Google Patents

Motordriven wheelchair Download PDF

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Publication number
EP1584312A1
EP1584312A1 EP04008553A EP04008553A EP1584312A1 EP 1584312 A1 EP1584312 A1 EP 1584312A1 EP 04008553 A EP04008553 A EP 04008553A EP 04008553 A EP04008553 A EP 04008553A EP 1584312 A1 EP1584312 A1 EP 1584312A1
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EP
European Patent Office
Prior art keywords
wheels
wheel
drive
wheelchair
additional
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Granted
Application number
EP04008553A
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German (de)
French (fr)
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EP1584312B1 (en
Inventor
Samuel Huerlimann
Kurt Hunziker
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Degonda-Rehab Sa
Degonda Rehab SA
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Degonda-Rehab Sa
Degonda Rehab SA
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Priority to EP04008553A priority Critical patent/EP1584312B1/en
Priority to DE502004003394T priority patent/DE502004003394D1/en
Priority to AT04008553T priority patent/ATE358465T1/en
Publication of EP1584312A1 publication Critical patent/EP1584312A1/en
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Publication of EP1584312B1 publication Critical patent/EP1584312B1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/045—Rear wheel drive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps

Definitions

  • the present invention relates to a motor-driven Wheelchair equipped in particular for overcoming obstacles.
  • Such a wheelchair should be usable for indoor and outdoor use. With he can easily overcome obstacles up to 5 cm in height. The Overcoming obstacles up to 10 cm in height is possible, but one sets special driving technique ahead, which, however, many customers due to their Disability can not be assumed.
  • a particular aim of the invention is a drive concept which is cost-effective and is based on existing wheelchairs, in particular the "turbo-twist", assemble and disassemble. It has to be for the interior and Outdoor operation are suitable. Obstacles up to 10 cm high, should be possible without punches and can be overrun easily.
  • Figs 1-5 show schematically the operation of the Wheelchair.
  • the lower part of the wheelchair is in Fig. 6-8 laterally, in Fig. 9 and 10 obliquely, and shown in Fig. 11 seen from the rear.
  • the rearmost point of the wheelchair is the rear wheel bar so far. This rear wheel bar falls off the friction wheel drive. The diameters and the position of the additional and intermediate gears must be selected after this point.
  • gray tires with a pronounced profiling should be used come (gray tires are better for indoor use).
  • the auxiliary wheels must not be driven during normal driving nor allowed to drive Have contact with the ground.
  • the additional wheels may only be driven when with the wheelchair should be driven an obstacle.
  • the additional wheels and the intermediate wheels are sprung with a Bolted double swingarm.
  • the suspension of the swivel arms is called by Taken over Rosta elements.
  • the intermediate wheels are made with the help of eccentrics biased against the auxiliary wheels and are in constant engagement with these.
  • the goal is that the Doppelarmschwinge when driving over obstacles as early as possible and should deflect as little as possible, until the intermediate wheels have built up the full contact pressure against the drive wheels.
  • a stop for the double-arm swingarm must be attached to the base chassis, so that it can not deflect too far in the event of a possible puncture of the additional and drive wheels. Because the basic chassis for the Rosta elements, as they are used in the previous Heckradbügel, should also serve for the double-arm swingarm as a recording and fulcrum, the geometry of the positioning of the additional and intermediate wheels are given with little leeway.
  • the "turbo-twist" is in its original state from the rear wheel bar and a 140 mm swivel castor against tilting backwards.
  • the wheelchair thus has a very small turning circle.
  • the rear wheel arch and the castor are not required for the friction wheel drive.
  • V-belt or even separate electric motors drive the auxiliary wheels.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Lens Barrels (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The wheelchair is electrically driven and equipped with at least one wheel positioned in front of the driven pair and at least one supporting wheel at the back which can be vertically moved. The supporting wheel is connected to a power transmission unit in the shape of intermediate wheels activated only when the chair is lifted at the front and driven until the obstacle is overcome or the step mounted. The wheel is kept in a raised position when the chair is moved across level ground.

Description

Die vorliegende Erfindung bezieht sich auf einen motorisch angetriebenen Rollstuhl, der insbesondere zur Überwindung von Hindernissen ausgestattet ist.The present invention relates to a motor-driven Wheelchair equipped in particular for overcoming obstacles.

Ferner ist eine bevorzugte Anwendung dieser Erfindung in einem bekannten Rollstuhl beschrieben, der vom Anmelder unter der Bezeichnung "Turbo-Twist" verkauft wird und dessen hauptsächlichen Merkmale in der Patentanmeldung FR 2 727 012 dargestellt und beschrieben sind.Furthermore, a preferred application of this invention is in a known Wheelchair described by the applicant under the name "Turbo-Twist" is sold and its main features in the patent application FR 2 727 012 are shown and described.

Solch ein Rollstuhl soll für den Innen- und Aussenbetrieb verwendbar sein. Mit ihm können Hindernisse bis 5 cm Höhe problemlos überfahren werden. Das Überwinden von Hindernissen bis 10 cm Höhe ist möglich, setzt allerdings eine spezielle Fahrtechnik voraus, welche aber bei vielen Kunden aufgrund ihrer Behinderung nicht vorausgesetzt werden kann.Such a wheelchair should be usable for indoor and outdoor use. With he can easily overcome obstacles up to 5 cm in height. The Overcoming obstacles up to 10 cm in height is possible, but one sets special driving technique ahead, which, however, many customers due to their Disability can not be assumed.

Ein besonderes Ziel der Erfindung ist ein Antriebskonzept, welches kostengünstig ist und sich an bestehenden Rollstühlen, insbesondere am "Turbo-Twist", montieren und demontieren lässt. Es muss sich für den Innen- und Aussenbetrieb eignen. Hindernisse bis 10 cm Höhe, sollten möglichst ohne Schläge und ohne weiteres überfahren werden können.A particular aim of the invention is a drive concept which is cost-effective and is based on existing wheelchairs, in particular the "turbo-twist", assemble and disassemble. It has to be for the interior and Outdoor operation are suitable. Obstacles up to 10 cm high, should be possible without punches and can be overrun easily.

Die wesentlichen Merkmale des erfindungsgemässen Rollstuhls sind im Patentanspruch 1 angegeben. Die abhängigen Patentansprüche beziehen sich auf besondere Ausführungsarten.The essential features of the inventive wheelchair are in Claim 1 specified. The dependent claims relate to special designs.

Nachstehend ist ein Beispiel eines erfindungsgemässen Rollstuhls mit elektrischem Antrieb mit Bezug auf die schematischen beiliegenden Zeichnungen beschrieben. Andere Merkmale des Rollstuhls sind aus der oben genannten FR 2 727 012 Veröffentlichung zu entnehmen.Below is an example of a novel wheelchair with electric drive with reference to the schematic accompanying drawings described. Other features of the wheelchair are from the above FR 2 727 012 publication.

In den Zeichnungen zeigen die Fig. 1-5 schematisch die Funktionsweise des Rollstuhls. Das Unterteil des Rollstuhls ist in Fig. 6-8 seitlich, in Fig. 9 und 10 schräg, und in Fig. 11 von hinten gesehen dargestellt.In the drawings, Figs 1-5 show schematically the operation of the Wheelchair. The lower part of the wheelchair is in Fig. 6-8 laterally, in Fig. 9 and 10 obliquely, and shown in Fig. 11 seen from the rear.

Um den bis dahin gemachten Erkenntnissen möglichst gerecht zu werden, kam der Erfinder auf die Idee vom Reibradantrieb. Auch mit diesem Konzept kann die Grundidee der Radstandsverlängerung wie beim Zahnriemen-Antrieb beibehalten werden.In order to do justice to the findings made so far, The inventor came up with the idea of the friction wheel drive. Even with this concept, the Main idea of the wheelbase extension as in the belt drive maintained become.

Der Reibradantrieb ist bekannt und kommt heute bei verschiedenen Geräten und Fahrzeugen zum Einsatz:

  • Spez. Schienenfahrzeuge
  • Zuggeräte für Handrollstühle
  • Fahrräder mit Hilfsmotor (legendär ist der Velo-Solex).
The friction wheel drive is known and is used today in various devices and vehicles:
  • Special rail vehicles
  • Pulling devices for hand wheelchairs
  • Bicycles with auxiliary engine (legendary is the Velo-Solex).

Bei diesem Stand der Ermittlungen wurde festgehalten, dass vorzüglich mit dem Reibradprinzip weiter gearbeitet werden soll. Als Erstes müssen die Vor- und Nachteile des Reibradkonzeptes aufgezeigt werden. Diese sind in der Tabelle 9 ersichtlich. Vor- und Nachteile des Reibradkonzeptes Vorteile Nachteile - Zusatzräder nur bei Bedarf angetrieben. - Schlupf abhängig von mehreren Einflüssen - gut geeignet für den Innen- und Aussenbetrieb - erfordert grosse Anpressdrücke - unproblematisch bei Montage / Demontage - nur für kleine Leistungen - geräuscharm - preisgünstig - gleiche Umfangsgeschwindigkeit der Räder In this state of the investigation, it was stated that excellent work should be continued with the friction wheel principle. First of all, the advantages and disadvantages of the friction wheel concept have to be pointed out. These are shown in Table 9. Advantages and disadvantages of the friction wheel concept advantages disadvantage - Additional wheels driven only when needed. - Slip depending on several influences - well suited for indoor and outdoor use - requires large contact pressures - unproblematic during assembly / disassembly - only for small services - low noise - reasonably priced - Same circumferential speed of the wheels

Folgende Schwerpunkte müssen in diesem Fall beachtet werden:

  • 1. Gesamtlänge von max. 1200 mm und der Wendekreis dürfen nicht überschritten werden
  • 2. Welche Art von Rädern soll zum Einsatz kommen?
  • 3. Die dynamische und die statische Kippsicherheit.
  • 4. Kann genügend Zugkraft auf die Zusatzräder übertragen werden?
  • 5. Unter welchen Umständen sollen die Zusatzräder angetrieben werden?
    • The following priorities have to be considered in this case:
  • 1. total length of max. 1200 mm and the turning circle must not be exceeded
  • 2. Which kind of wheels should be used?
  • 3. The dynamic and the static tilt safety.
  • 4. Can enough traction be transferred to the additional wheels?
  • 5. Under what circumstances should the auxiliary wheels be driven?

    • Zu Punkt 1:To point 1:

    Den hintersten Punkt des Rollstuhls stellt bis jetzt der Heckradbügel dar. Dieser Heckradbügel fällt beim Reibradantrieb weg.
    Die Durchmesser sowie die Position der Zusatz- und Zwischenräder müssen nach diesem Punkt ausgewählt werden.    The rearmost point of the wheelchair is the rear wheel bar so far. This rear wheel bar falls off the friction wheel drive.
    The diameters and the position of the additional and intermediate gears must be selected after this point.

    Zu Punkt 2:To point 2:

    Grundsätzlich sollten graue Reifen mit einer ausgeprägten Profilierung zum Einsatz kommen (graue Reifen eignen sich besser für den Innenbereich). Basically, gray tires with a pronounced profiling should be used come (gray tires are better for indoor use).

    Die Vorgabe vom geringen Platzbedarf und langem Radstand erfordert einen Kompromiss bei der Wahl der Raddurchmesser. Im folgenden wurde bei den Zusatzräder für 180 mm und für die Zwischenräder 60 mm Durchmesser entschieden. Bei den Antriebsrädern wird der Durchmesser von 340 mm beibehalten.The requirement of small footprint and long wheelbase requires one Compromise in the choice of wheel diameter. The following was at the Additional wheels for 180 mm and for the intermediate wheels 60 mm diameter decided. For the drive wheels, the diameter of 340 mm is maintained.

    Folgende Punkte sind zu beachten:

  • Antriebsräder:Aus Sicherheitsgründen soll vorzüglich bei diesem Konzept auf luftbereifte Räder verzichtet werden.Es steht eine pannensichere Variante zur Verfügung.
    Von der Firma Rollag können an Stelle von Luftschläuchen, spezielle "Flexel-Einlagen" in die Reifen eingelegt werden. Es werden bereits heute viele Rollstühle mit diesen Einlagen ausgerüstet.
  • Zwischenräder:Wie gut die erforderliche Zugkraft übertragen werden kann, hängt stark von diesen Rädern ab und muss anhand von Tests ausprobiert werden, da keine Messwerte vorliegen. Diese Räder müssten über eine Verzahnung, Profilierung oder eine Randrierung verfügen.
  • Zusatzräder:Da diese Räder beim Überfahren von Hindernissen praktisch das ganze Gewicht des Rollstuhls und des Fahrers tragen, müssen sie vorzüglich eine Mindesttragfähigkeit von 115 kg aufweisen. Der Durchmesser dieser Räder wurde auf 180 mm festgelegt. Profilierte Reifen mit "Flexel-Einlagen" sind anwendbar.
    Mögliche Alternativen sind Schwerlasträder mit Vollgummibereifung ohne Profilierung.
    • The following points should be noted:
  • Drive wheels: For reasons of safety, this concept is designed to eliminate the need for pneumatic wheels. A puncture-proof version is available.
    From the company Rollag can be inserted instead of air hoses, special "Flexel deposits" in the tires. Already today many wheelchairs are equipped with these insoles.
  • Intermediate wheels : How well the required traction can be transmitted depends strongly on these wheels and must be tried out on the basis of tests since no measured values are available. These wheels should have a toothing, profiling or a Randrierung.
  • Additional wheels: Since these wheels carry almost the entire weight of the wheelchair and the driver when crossing obstacles, they must have a minimum load capacity of 115 kg. The diameter of these wheels was set to 180 mm. Profiled tires with "Flexel inserts" are applicable.
    Possible alternatives are heavy duty wheels with solid rubber tires without profiling.

    • Zu Punkt 3:To point 3:

    Die dynamische und die statische Kippsicherheit müssten gewährleistet werden.The dynamic and static overturning safety would have to be guaranteed.

    Die Standfestigkeit eines festen Körpers ist umso grösser:

    • je grösser die Gewichtskraft des Körpers ist.
    • je grösser die Grundfläche (Radstand, Spurbreite) ist.
    • je tiefer und zentraler der Gesamtschwerpunkt liegt.
    The stability of a solid body is even greater:
    • the greater the weight of the body.
    • the larger the base area (wheelbase, track width) is.
    • the deeper and more central the overall focus lies.

    Zu Punkt 4:To point 4:

    Die übertragbare Zugkraft ist stark von folgenden Einflüssen abhängig:

    • Profilierung und Rauhigkeit der Räder
    • Anpresskräfte der Räder gegeneinander
    • Eintauchtiefe des Zwischenrades ins Antriebs- und Zusatzrad
    • Verschmutzungen / Nässe / Schnee
    The transferable tensile force is heavily dependent on the following factors:
    • Profiling and roughness of the wheels
    • Contact forces of the wheels against each other
    • Immersion depth of the intermediate wheel into the drive and auxiliary wheel
    • Dirt / wetness / snow

    Zu Punkt 5:To point 5:

    Die Zusatzräder dürfen bei normaler Fahrt weder angetrieben werden, noch dürfen sie Bodenkontakt haben.The auxiliary wheels must not be driven during normal driving nor allowed to drive Have contact with the ground.

    Grundsätzlich dürfen die Zusatzräder erst dann angetrieben werden, wenn mit dem Rollstuhl ein Hindernis befahren werden soll.Basically, the additional wheels may only be driven when with the wheelchair should be driven an obstacle.

    Wie oben bereits festgehalten, können Hindernisse in der Höhe von 5 cm ohne weiteres überfahren werden. Bei Hindernissen > 5 cm soll das Reibradkonzept zum Einsatz kommen.As noted above, obstacles in the height of 5 cm can without Another run over. For obstacles> 5 cm the friction wheel concept should be used for Use come.

    Wie funktioniert das Reibradkonzept:How does the friction wheel concept work?

    Die Zusatzräder und die Zwischenräder (siehe Fig. 1-2) sind mit einer gefederten Doppelschwinge verschraubt. Die Federung der Schwenkarme wird von sogenannten Rosta-Elementen übernommen. Die Zwischenräder werden mit Hilfe von Exzentern gegen die Zusatzräder vorgespannt und sind mit diesen dauernd im Eingriff. The additional wheels and the intermediate wheels (see Fig. 1-2) are sprung with a Bolted double swingarm. The suspension of the swivel arms is called by Taken over Rosta elements. The intermediate wheels are made with the help of eccentrics biased against the auxiliary wheels and are in constant engagement with these.

    Aus Gründen der Sicherheit und für die optimale Funktion des Reibradkonzeptes und der vorderen Übersteighilfe müssen die Hindernisse frontal angefahren werden.For reasons of safety and for the optimal function of the friction wheel concept and The front overreach must be approached head-on.

    Die Grundidee der Betriebsart geht davon aus, dass bei Hindernissen bis 5 cm Höhe die Doppelschwinge so weit eingefedert ist, dass die Zwischenräder den maximalen Anpressdruck gegen die Antriebsräder aufgebaut haben und so die grössten Kräfte übertragen können. Das Hindernis kann so noch überfahren werden, ohne dass die Antriebsräder abgehoben werden.The basic idea of the operating mode assumes that with obstacles up to 5 cm height the double rocker is so far feathered that the intermediate wheels the maximum Have built contact pressure against the drive wheels and so the greatest forces can transfer. The obstacle can still be run over without the Drive wheels are lifted.

    Soll nun ein Hindernis überfahren werden, das höher als 5 cm ist, wird der Rollstuhl vorne mit Hilfe der Übersteighilfe (siehe Fig. 1-2) weiter angehoben. Von da an werden die Antriebsräder abgehoben und der Antrieb erfolgt über die Zusatzräder, bis die Antriebsräder am Hindernis wieder Halt finden und normal weitergefahren werden kann. Dabei bewegt sich die Doppelarmschwinge wieder in seine Ausgangsposition, und die Kraftübertragung vom Antriebsrad auf das Zwischenrad wird wieder unterbrochen.If now an obstacle is exceeded, which is higher than 5 cm, the wheelchair at the front with the help of the Übersteighilfe (see Fig. 1-2) further raised. Thenceforth the drive wheels are lifted and the drive is via the additional wheels until the drive wheels will stop again at the obstacle and continue driving normally can. The double-arm rocker moves back to its original position, and the power transmission from the drive wheel to the idler will be restored interrupted.

    Positionierung der Zusatz- und Zwischenräder:Positioning of the additional and intermediate wheels:

    Das Ziel ist, dass die Doppelarmschwinge beim Überfahren von Hindernissen möglichst früh und möglichst wenig einfedern soll, bis die Zwischenräder den vollen Anpressdruck gegen die Antriebsräder aufgebaut haben. Das heisst, dass die Zusatzräder bei normaler Fahrt nur ca. 2 cm Bodenfreiheit aufweisen und der Abstand zwischen den Antriebsrädern und den Zwischenrädern, nur ca. 5 mm betragen soll. Aus Sicherheitsgründen, muss am Grundchassis ein Anschlag für die Doppelarmschwinge angebracht werden, damit diese bei einem allfälligen Reifenschaden der Zusatz- und Antriebsräder nicht zu weit einfedern kann.
    Weil am Grundchassis die Aufnahmen für die Rosta-Elemente, wie sie beim bisherigen Heckradbügel verwendet werden, auch für die Doppelarm-Schwinge als Aufnahme und Drehpunkt dienen soll, sind aufgrund der Geometrie die Positionierung der Zusatz- und Zwischenräder mit wenig Spielraum vorgegeben.    The goal is that the Doppelarmschwinge when driving over obstacles as early as possible and should deflect as little as possible, until the intermediate wheels have built up the full contact pressure against the drive wheels. This means that the auxiliary wheels have only about 2 cm ground clearance during normal driving and the distance between the drive wheels and the intermediate wheels should be only about 5 mm. For safety reasons, a stop for the double-arm swingarm must be attached to the base chassis, so that it can not deflect too far in the event of a possible puncture of the additional and drive wheels.
    Because the basic chassis for the Rosta elements, as they are used in the previous Heckradbügel, should also serve for the double-arm swingarm as a recording and fulcrum, the geometry of the positioning of the additional and intermediate wheels are given with little leeway.

    So kann vermieden werden, dass Änderungen am Grundchassis notwendig werden und der Reibradantrieb auf einfachste Weise montiert und demontiert werden kann. This avoids the need for changes to the basic chassis and the friction wheel drive can be assembled and disassembled in the simplest way.

    Beim Positionieren der Zusatzräder ergibt sich zusätzlich folgendes Problem:When positioning the additional wheels, the following additional problem arises:

    Der "Turbo-Twist" wird in seinem heutigen Originalzustand vom Heckradbügel und einer 140 mm Schwenkrolle gegen das Abkippen nach hinten gestützt. Der Rollstuhl weist so einen sehr kleinen Wendekreis auf.The "turbo-twist" is in its original state from the rear wheel bar and a 140 mm swivel castor against tilting backwards. The wheelchair thus has a very small turning circle.

    Der Heckradbügel und die Schwenkrolle werden beim Reibradantrieb nicht benötigt.The rear wheel arch and the castor are not required for the friction wheel drive.

    Durch die Montage des Reibradkonzeptes wird die vorgegebene Gesamtlänge des Rollstuhls nicht überschritten, trotzdem ergibt sich ein grösserer Wendekreis.
    Diese Situation wird mit Fig. 3 und Fig. 4 dargestellt.    The assembly of the friction wheel concept does not exceed the given total length of the wheelchair, nevertheless it results in a larger turning circle.
    This situation is illustrated by FIGS. 3 and 4.

    Um diesem Umstand zu begegnen, müssen die beiden Zusatzräder gegen die Mitte verschoben montiert werden. Dies hat zur Folge, dass die Zwischenräder breiter ausgelegt werden müssen. Diese Situation wird mit Fig. 5 dargestellt.To counter this circumstance, the two auxiliary wheels must go against the middle be mounted shifted. This has the consequence that the intermediate wheels wider must be interpreted. This situation is illustrated by FIG.

    Es muss ein Kompromiss bezüglich Wendekreis vorgesehen werden. Es muss beachtet werden, dass die Zusatzräder nicht zu weit zur Mitte verschoben werden dürfen, da sonst die seitliche Kippsicherheit beim Befahren von Hindernissen beeinträchtigt wird.There has to be a compromise regarding the tropic. It must It should be noted that the additional wheels are not moved too far to the center otherwise, the lateral tilting safety when driving on obstacles is impaired.

    Zusammenfassend kann nun gesagt werden, dass sich das Reibradkonzept für den "Turbo-Twist" am besten eignet.In summary, it can now be said that the friction wheel concept for the "Turbo Twist" is best.

    Der grösste Vorteil ist, dass dieses Konzept problemlos am "Turbo-Twist" montiert- und demontiert werden kann.The biggest advantage is that this concept can be easily mounted on the "turbo-twist" and can be dismantled.

    In Fig. 6-11 ist genau ersichtlich, wie dieses Antriebskonzept beim "Turbo-Twist" realisiert werden kann. Der Sitz, der auf dem Chassis angeordnet ist, ist in diesen Zeichnungen nicht dargestellt.In Fig. 6-11 is exactly apparent how this drive concept in "turbo-twist" can be realized. The seat, which is arranged on the chassis, is in this Drawings not shown.

    Anstatt der beschriebenen Zwischenräder können zum Beispiel Keilriemen oder sogar separate Elektromotore die Zusatzräder antreiben.Instead of the described intermediate wheels, for example, V-belt or even separate electric motors drive the auxiliary wheels.

    Claims (4)

    Motorisch angetriebener Rollstuhl mit einem Chassis, das mit einem Sitz versehen ist, mit einem Paar motorisierten Triebräder, mit mindestens einem Vorderrad, das sich im Vordergrund der Triebräder befindet, und mit mindestens einem hinteren Stützrad, das sich im Hintergrund der Triebräder befindet und höhenmässig beweglich auf dem Chassis angebracht ist.
       dadurch gekennzeichnet, dass er zusätzliche Antriebsmittel aufweist, die das oder jedes hintere Stützrad in Drehbewegung antreiben wenn dieses Stützrad relativ zum Chassis verschoben wird, wegen einer rückwärtigen Kippbewegung des Chassis, und dieses Stützrad nicht antreiben wenn der Rollstuhl sich mit seinen Triebrädern und seinem Vorderrad oder seinen Vorderrädern auf einem ebenen Boden bewegt.    Powered wheelchair having a chassis provided with a seat, a pair of motorized power wheels, at least one front wheel located in the front of the power wheels, and at least one rear wheel located in the background of the power wheels and vertically movable mounted on the chassis.
    characterized in that it has additional drive means which drive the or each rear support wheel in rotational movement when this support wheel is displaced relative to the chassis, due to a rearward tilting movement of the chassis, and this support wheel does not drive when the wheelchair with its drive wheels and its front wheel or his front wheels moved on a level ground.         Rollstuhl nach Anspruch 1, dadurch gekennzeichnet, dass die zusätzlichen Antriebsmittel mechanische Übertragungsmittel zwischen den Antriebsrädern und dem hinteren Stützrad bzw. den hinteren Stützrädern aufweisen.A wheelchair according to claim 1, characterized in that the additional drive means comprise mechanical transmission means between the drive wheels and the rear support wheel (s). Rollstuhl nach Anspruch 2, dadurch gekennzeichnet, dass die hinteren Stützräder von zwei Zusatzrädern gebildet sind, die jeweils einem der Triebräder entsprechen, wobei jedes Zusatzrad einem Zwischenrad entspricht, das gegen dieses rollt und sich gegen das Triebrad anlehnen und rollen kann, wenn das Zusatzrad gehoben wird.Wheelchair according to claim 2, characterized in that the rear support wheels are formed by two additional wheels, each corresponding to one of the drive wheels, each additional wheel corresponds to an intermediate wheel, which rolls against this and lean against the drive wheel and can roll when the auxiliary wheel lifted becomes. Rollstuhl nach Anspruch 3, dadurch gekennzeichnet, dass die Zusatzräder und die Zwischenräder durch eine gefederte Schwinge getragen sind, die um eine Horizontalachse schwenkbar am Chassis angeordnet ist.Wheelchair according to claim 3, characterized in that the additional wheels and the intermediate wheels are supported by a spring-loaded rocker, which is arranged pivotably about a horizontal axis on the chassis.
    EP04008553A 2004-04-08 2004-04-08 Motordriven wheelchair Expired - Lifetime EP1584312B1 (en)

    Priority Applications (3)

    Application Number Priority Date Filing Date Title
    EP04008553A EP1584312B1 (en) 2004-04-08 2004-04-08 Motordriven wheelchair
    DE502004003394T DE502004003394D1 (en) 2004-04-08 2004-04-08 Motor-driven wheelchair
    AT04008553T ATE358465T1 (en) 2004-04-08 2004-04-08 MOTOR DRIVEN WHEELCHAIR

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP04008553A EP1584312B1 (en) 2004-04-08 2004-04-08 Motordriven wheelchair

    Publications (2)

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    EP1584312A1 true EP1584312A1 (en) 2005-10-12
    EP1584312B1 EP1584312B1 (en) 2007-04-04

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    ID=34896023

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP04008553A Expired - Lifetime EP1584312B1 (en) 2004-04-08 2004-04-08 Motordriven wheelchair

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    EP (1) EP1584312B1 (en)
    AT (1) ATE358465T1 (en)
    DE (1) DE502004003394D1 (en)

    Cited By (4)

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    WO2006136046A1 (en) 2005-06-24 2006-12-28 Degonda Rehab Sa Wheelchair with central wheel drive
    EP1854443A3 (en) * 2006-05-11 2009-03-11 Kanto Auto Works, Ltd. Motorized wheelchair
    JP2009112533A (en) * 2007-11-06 2009-05-28 Kanto Auto Works Ltd Wheelchair
    WO2009068902A1 (en) * 2007-11-30 2009-06-04 Advanced Vehicle Concepts Limited Drivable anti-tip castors

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    US7896394B2 (en) 2005-08-18 2011-03-01 Sunrise Medical Hhg, Inc. Midwheel drive wheelchair with independent front and rear suspension
    US8851214B2 (en) 2010-07-15 2014-10-07 Permobil Ab Electric mid-wheel drive wheelchair

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    US5222567A (en) * 1991-04-26 1993-06-29 Genus Inc. Power assist device for a wheelchair
    FR2727012A1 (en) 1994-11-18 1996-05-24 Degonda Rehab Sa Motor driven wheel chair for handicapped person
    US5904214A (en) * 1997-07-11 1999-05-18 Lin; David Jung-Ching Power assist anti-tip wheel system for invalid carriage
    US6273212B1 (en) * 2000-02-12 2001-08-14 Royce H. Husted Lightweight maneuverable power chair
    EP1340481A1 (en) * 2002-02-28 2003-09-03 Pihsiang Machinery MFG. Co., Ltd. Anti-tip mechanism for electric wheelchair

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    US5222567A (en) * 1991-04-26 1993-06-29 Genus Inc. Power assist device for a wheelchair
    FR2727012A1 (en) 1994-11-18 1996-05-24 Degonda Rehab Sa Motor driven wheel chair for handicapped person
    US5904214A (en) * 1997-07-11 1999-05-18 Lin; David Jung-Ching Power assist anti-tip wheel system for invalid carriage
    US6273212B1 (en) * 2000-02-12 2001-08-14 Royce H. Husted Lightweight maneuverable power chair
    EP1340481A1 (en) * 2002-02-28 2003-09-03 Pihsiang Machinery MFG. Co., Ltd. Anti-tip mechanism for electric wheelchair

    Cited By (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2006136046A1 (en) 2005-06-24 2006-12-28 Degonda Rehab Sa Wheelchair with central wheel drive
    US8186463B2 (en) 2005-06-24 2012-05-29 Degonda Rehab Sa Wheelchair with middle wheel drive
    EP1854443A3 (en) * 2006-05-11 2009-03-11 Kanto Auto Works, Ltd. Motorized wheelchair
    JP2009112533A (en) * 2007-11-06 2009-05-28 Kanto Auto Works Ltd Wheelchair
    WO2009068902A1 (en) * 2007-11-30 2009-06-04 Advanced Vehicle Concepts Limited Drivable anti-tip castors

    Also Published As

    Publication number Publication date
    ATE358465T1 (en) 2007-04-15
    EP1584312B1 (en) 2007-04-04
    DE502004003394D1 (en) 2007-05-16

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