WO2001003632A1 - Suspension wheel chair - Google Patents

Suspension wheel chair Download PDF

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Publication number
WO2001003632A1
WO2001003632A1 PCT/EP2000/005145 EP0005145W WO0103632A1 WO 2001003632 A1 WO2001003632 A1 WO 2001003632A1 EP 0005145 W EP0005145 W EP 0005145W WO 0103632 A1 WO0103632 A1 WO 0103632A1
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WO
WIPO (PCT)
Prior art keywords
wheel
spring
axis
articulated
articulated lever
Prior art date
Application number
PCT/EP2000/005145
Other languages
German (de)
French (fr)
Inventor
Horst Lindenkamp
Original Assignee
Invacare Deutschland Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Invacare Deutschland Gmbh filed Critical Invacare Deutschland Gmbh
Priority to AU54024/00A priority Critical patent/AU5402400A/en
Priority to EP00938759A priority patent/EP1196125A1/en
Publication of WO2001003632A1 publication Critical patent/WO2001003632A1/en

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Classifications

    • 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
    • A61G5/10—Parts, details or accessories
    • A61G5/1054—Large wheels, e.g. higher than the seat portion
    • 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
    • A61G5/10—Parts, details or accessories
    • A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame

Definitions

  • the invention relates to a wheelchair, in particular a foldable wheelchair
  • Cross struts for rigid or foldable connection of the side frames, each side frame being connected to the wheel or the structural unit via a spring device.
  • the wheel can either be driven or not driven.
  • the suspension that can be achieved in wheelchairs, in particular motorized wheelchairs, by appropriate selection of the materials for the seat and the tires of the wheels is often considered insufficient.
  • a swing arm designed identically for right and left use has its front length end in the direction of travel, which can be pivoted in height on a longitudinal beam on a chassis longitudinal beam, and is rear-mounted with its rear end the spring member formed by a shock absorber or a gas pressure spring, which is articulated on the longitudinal beam and on the rocker arm.
  • the drive is attached to the swing arm. Between the two wings there is a free space that extends from the rear of the wheelchair to the swing arm pivot axes for the convenient and low-cost insertion of a battery.
  • a wheelchair is known from G 88 05 610.4, in which each driven wheel is cushioned separately with its electric motor drive.
  • a telescopic spring in the form of a gas pressure spring or a shock absorber is provided as the suspension, the spring being fixed with one end in a joint of the drive seated on the wheel axle and with its other end in a joint on the chair frame.
  • the invention has for its object to propose a compact and comfortable suspension for the drive wheels of a wheelchair, which can be produced with reasonable constructional and manufacturing expenditure and which can also be used in particular with foldable motor wheelchairs.
  • the spring device is a spring joint with a spring element which is supported on the wheel or the structural unit, the joint axis being arranged eccentrically to the wheel axis.
  • the spring element of the spring joint is advantageously positioned above the axis of the wheel.
  • a further improvement is achieved in that the side frame between the hinge axis and the spring element is attached to the spring joint.
  • the pressure forces exerted by the side frame are therefore not introduced in the area of the wheel axle of the wheel, but also eccentrically. Overall, this causes a slight kinking movement in the region of the wheel or the structural unit when deflecting.
  • the spring joint consists of a first articulated lever connected to the geared motor, a second articulated lever connected to the side frame, a swivel shaft articulatingly connecting both articulated levers at one end in the articulated axis and a compression spring clamped between the other end of the articulated lever.
  • the pivot shaft is preferably arranged horizontally transversely to the direction of travel and viewed in the direction of travel in front of the axis of the wheel or drive wheel.
  • the eccentric arrangement of the pivot shaft in front of the axis of the wheel or drive wheel offers the advantage that the side frame can be made relatively short, which saves material.
  • the compression spring is preferably clamped vertically above the axis of the wheel or drive wheel between the articulated levers.
  • the two articulated levers are designed so that the spring movement is limited in their end positions. This is particularly important when the compression spring is not under load, as is the case when lifting the wheelchair. It must be ensured that the two articulated levers do not move so far apart that the compression spring can fall out.
  • the pivoting angle of the articulated lever is preferably limited by stops such that the compression spring still has a minimum prestress at a maximum relative distance between the ends of the articulated lever and that the minimum relative distance between the ends of the articulated lever is not determined by the dimensions of the compression spring.
  • Figure 2 shows an embodiment of the connecting to the side frame
  • FIG. 3 shows an adapted embodiment of the articulated lever to be connected to the wheel in vertical section
  • FIG. 4 shows a vertical section in the region of the swivel shaft
  • the side frame 1 essentially consists of a bent tube which is connected at the front to a control head tube 18 for the steerable swivel wheel 2 and at the rear to an articulated lever 6 of the spring joint 19.
  • This hinge lever 6 is in the hinge axis 20 via a pivot shaft 7 with a Articulated lever 5 articulated, which in turn is attached to the motor 4, which together with the wheel or drive wheel 3 forms an unsprung unit.
  • a compression spring 8 is clamped as a spring element 21 between the articulated levers 5 and 6, as a result of which the side frame 1 is spring-mounted relative to the axis 9 of the wheel or drive wheel 3.
  • the articulated lever 6 preferably consists of a cap-like cast or forged part with a transverse bore 10 for the mounting of the pivot shaft and with a seat 11a for centering the compression spring 8.
  • a transverse bore 10 for the mounting of the pivot shaft and with a seat 11a for centering the compression spring 8.
  • the wall 26 is drawn downward in an arc around the transverse bore 10 and ends as a stop 22.
  • the associated articulated lever 5 (FIG. 3) preferably also consists of a cast or forged part with a transverse bore 12 for receiving the pivot shaft 7 and with a centering seat 11b for the compression spring 8. In the articulated lever 5 there are also vertical bores 13 for the passage provided by fastening screws.
  • Both articulated levers 5, 6 work together in such a way that the cap-like articulated lever 6 partially overlaps the articulated lever 5, the stops 22, 23 lying one on top of the other in the maximum open position of the spring joint and the stops 24, 25 in the minimum position.
  • the swivel shaft 7 includes a screw bolt 16 with a nut 17 as well as a spacer sleeve 15 and a bush 14 with slide bearing properties.
  • both articulated levers 5, 6 are U-shaped in cross section and with centering seats 11a and 11b for the compression spring 8.
  • the opposite legs of the U-shaped cross sections of the articulated levers 5, 6 can be designed as stops 24, 25 to limit the maximum compression of the compression spring 8.
  • the stops 22, 23 (FIGS.

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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)
  • Vehicle Body Suspensions (AREA)

Abstract

The invention relates to a wheel chair that is provided with spring-loaded wheels (3). The wheel chair consists of two laterally reversed side frames (1). One steerable swiveled wheel (2) of a small diameter and one non-steerable wheel or drive wheel (3) or a wheel with motor (4) of a large diameter are fixed to the respective side frames. The wheel chair further comprises cross struts which are known per se and which link the side frames (1) either fixedly or foldably. The spring system of the inventive wheel chair is a spring joint (19) with a spring element (21) that rests on the wheel or drive wheel or the structural unit, the joint axis (20) being excentrically located with respect to he wheel axis (9).

Description

Gefederter Rollstuhl Suspension wheelchair
Beschreibungdescription
Die Erfindung betrifft einen Rollstuhl, insbesondere einen faltbaren Rollstuhl, mitThe invention relates to a wheelchair, in particular a foldable wheelchair
zwei spiegelbildlich zueinander angeordneten Seitenrahmen, an denen je ein durchmesserkleines lenkbares Schwenkrad und ein durchmessergroßes nicht lenkbares Rad oder Antriebsrad mit Motor als Baueinheit gelagert ist, und mittwo side frames arranged in mirror image to each other, on each of which a small-diameter steerable swivel wheel and a large-diameter non-steerable wheel or drive wheel with a motor as a structural unit are mounted, and with
Querstreben zur starren oder klappbaren Verbindung der Seitenrahmen, wobei jeder Seitenrahmen über eine Federeinrichtung mit dem Rad oder der Baueinheit verbunden ist.Cross struts for rigid or foldable connection of the side frames, each side frame being connected to the wheel or the structural unit via a spring device.
Das Rad kann entweder antreibbar oder nicht angetrieben sein.The wheel can either be driven or not driven.
Die bei Rollstühlen, insbesondere Motor-Rollstühlen, erreichbare Federung durch entsprechende Auswahl der Materialien für den Sitz und die Bereifung der Räder wird vielfach als nicht ausreichend angesehen.The suspension that can be achieved in wheelchairs, in particular motorized wheelchairs, by appropriate selection of the materials for the seat and the tires of the wheels is often considered insufficient.
Man hat daher bereits in der DE 44 20 877 AI vorgeschlagen, die Antriebsräder in einer Schwinge zu lagern. Eine für den Rechts- und Linkseinsatz identisch ausgebildete Schwinge lagert mit ihrem in Fahrtrichtung vorderen Längenende in einer horizontalen Achse an einem Fahrgestell- Längsholm höhenverschwenkbar und ist mit ihrem hinteren Längenende durch das von einem Stoßdämpfer oder einer Gasdruckfeder gebildete, am Fahrgestell-Längsholm und an der Schwinge angelenkte Federorgan abgestützt. An der Schwinge ist der Antrieb festgelegt. Zwischen beiden Schwingen besteht ein von der Rollstuhl-Hinterseite bis zu den Schwingen-Schwenkachsen sich erstreckender Freiraum zum bequemen und schwerpunktgünstigen Einbringen einer Batterie.It has therefore already been proposed in DE 44 20 877 AI to store the drive wheels in a swing arm. A swing arm designed identically for right and left use has its front length end in the direction of travel, which can be pivoted in height on a longitudinal beam on a chassis longitudinal beam, and is rear-mounted with its rear end the spring member formed by a shock absorber or a gas pressure spring, which is articulated on the longitudinal beam and on the rocker arm. The drive is attached to the swing arm. Between the two wings there is a free space that extends from the rear of the wheelchair to the swing arm pivot axes for the convenient and low-cost insertion of a battery.
Aus dem G 88 05 610.4 ist ein Rollstuhl bekannt, bei dem jedes angetriebene Rad mit seinem elektromotorischen Antrieb separat abgefedert ist. Als Federung ist eine Teleskopfeder in Form einer Gasdruckfeder oder eines Stoßdämpfers vorgesehen, wobei die Feder mit einem Ende in einem Gelenk des auf der Radachse sitzenden Antriebs und mit seinem anderen Ende in einem Gelenk am Stuhlgestell festgelegt ist.A wheelchair is known from G 88 05 610.4, in which each driven wheel is cushioned separately with its electric motor drive. A telescopic spring in the form of a gas pressure spring or a shock absorber is provided as the suspension, the spring being fixed with one end in a joint of the drive seated on the wheel axle and with its other end in a joint on the chair frame.
Diese bekannten Federeinrichtungen sind voluminös und aufwendig.These known spring devices are voluminous and complex.
Der Erfindung liegt die Aufgabe zugrunde, eine kompakte und komfortable Federung für die Antriebsräder eines Rollstuhls vorzuschlagen, die mit vertretbarem konstruktiven und fertigungstechnischen Aufwand herstellbar ist und die insbesondere auch bei faltbaren Motor-Rollstühlen verwendbar ist.The invention has for its object to propose a compact and comfortable suspension for the drive wheels of a wheelchair, which can be produced with reasonable constructional and manufacturing expenditure and which can also be used in particular with foldable motor wheelchairs.
Zur Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, daß bei einem Rollstuhl der eingangs genannten Art die Federeinrichtung ein sich an dem Rad oder der Baueinheit abstützendes Federgelenk mit einem Federelement ist, wobei die Gelenkachse exzentrisch zur Radachse angeordnet ist.To achieve this object, it is proposed according to the invention that, in a wheelchair of the type mentioned at the outset, the spring device is a spring joint with a spring element which is supported on the wheel or the structural unit, the joint axis being arranged eccentrically to the wheel axis.
Die Tatsache, daß der Seitenrahmen sich über ein Federgelenk auf dem Rad bzw. der Baueinheit abstützt, wird eine kompakte Anordnung geschaffen, so daß sämtliche Bauteile in Seitenansicht vom Rad verdeckt sind, was insgesamt auch zur Verbesserung des optischen Eindrucks des Rollstuhls beiträgt. Vorteilhafterweise ist das Federelement des Federgelenks über der Achse des Rades positioniert. Diese konstruktiven Merkmale haben den Vorteil, daß eine Federbewegung ausgeführt werden kann, die gegenüber den herkömmlichen Bewegungen deutlich komfortabler ist.The fact that the side frame is supported on the wheel or the structural unit via a spring joint, a compact arrangement is created so that all components are covered by the wheel in a side view, which also contributes to improving the visual impression of the wheelchair overall. The spring element of the spring joint is advantageously positioned above the axis of the wheel. These design features have the advantage that a spring movement can be carried out which is significantly more comfortable compared to the conventional movements.
Eine weitere Verbesserung wird dadurch erreicht, daß der Seitenrahmen zwischen Gelenkachse und Federelement am Federgelenk befestigt ist. Die vom Seitenrahmen ausgeübten Druckkräfte werden somit nicht im Bereich der Radachse des Rades eingeleitet, sondern ebenfalls exzentrisch. Insgesamt wird dadurch im Bereich des Rades bzw. der Baueinheit eine leichte Knickbewegung beim Einfedern ausgeführt.A further improvement is achieved in that the side frame between the hinge axis and the spring element is attached to the spring joint. The pressure forces exerted by the side frame are therefore not introduced in the area of the wheel axle of the wheel, but also eccentrically. Overall, this causes a slight kinking movement in the region of the wheel or the structural unit when deflecting.
Gemäß einer bevorzugten Ausruhrungsform besteht das Federgelenk aus einem ersten, mit dem Getriebemotor verbundenen Gelenkhebel, einem zweiten, mit dem Seitenrahmen verbundenen Gelenkhebel, einer beide Gelenkhebel an einem Ende in der Gelenkachse gelenkig miteinander verbindenden Schwenkwelle und einer zwischen dem anderen Ende der Gelenkhebel eingespannten Druckfeder.According to a preferred embodiment, the spring joint consists of a first articulated lever connected to the geared motor, a second articulated lever connected to the side frame, a swivel shaft articulatingly connecting both articulated levers at one end in the articulated axis and a compression spring clamped between the other end of the articulated lever.
Die Schwenkwelle ist vorzugsweise horizontal quer zur Fahrtrichtung und in Fahrtrichtung gesehen vor der Achse des Rades oder Antriebsrades angeordnet. Die exzentrische Anordnung der Schwenkwelle vor der Achse des Rades oder Antriebsrades bietet den Vorteil, daß der Seitenrahmen relativ kurz ausgebildet sein kann, wodurch Material eingespart wird.The pivot shaft is preferably arranged horizontally transversely to the direction of travel and viewed in the direction of travel in front of the axis of the wheel or drive wheel. The eccentric arrangement of the pivot shaft in front of the axis of the wheel or drive wheel offers the advantage that the side frame can be made relatively short, which saves material.
Die Druckfeder ist vorzugsweise senkrecht oberhalb der Achse des Rades oder Antriebsrades zwischen den Gelenkhebeln eingespannt.The compression spring is preferably clamped vertically above the axis of the wheel or drive wheel between the articulated levers.
Die beiden Gelenkhebel sind so ausgebildet, daß die Federbewegung in ihren Endpositionen begrenzt wird. Dies ist insbesondere dann wichtig, wenn die Druckfeder unbelastet ist, wie dies beim Anheben des Rollstuhls der Fall ist. Hierbei muß sichergestellt sein, daß die beiden Gelenkhebel sich nicht soweit auseinanderbewegen, daß die Druckfeder herausfallen kann. Vorzugsweise ist der Schwenkwinkel der Gelenkhebel durch Anschläge derart eingeschränkt, daß die Druckfeder bei maximalem relativen Abstand der Enden der Gelenkhebel zueinander noch eine Mindestvorspannung aufweist und daß der minimale relative Abstand der Enden der Gelenkhebel nicht durch die Abmessungen der Druckfeder bestimmt wird.The two articulated levers are designed so that the spring movement is limited in their end positions. This is particularly important when the compression spring is not under load, as is the case when lifting the wheelchair. It must be ensured that the two articulated levers do not move so far apart that the compression spring can fall out. The pivoting angle of the articulated lever is preferably limited by stops such that the compression spring still has a minimum prestress at a maximum relative distance between the ends of the articulated lever and that the minimum relative distance between the ends of the articulated lever is not determined by the dimensions of the compression spring.
Weitere Einzelheiten werden anhand des in den Figuren 1 bis 5 dargestellten Ausführungsbeispiels näher erläutert.Further details are explained in more detail with reference to the exemplary embodiment shown in FIGS. 1 to 5.
Es zeigen:Show it:
Figur 1 eine stark vereinfachte Darstellung eines Seitenrahmens mit1 shows a greatly simplified representation of a side frame
Rädern, Motor und Federung,Wheels, engine and suspension,
Figur 2 eine Ausführungsform des mit dem Seitenrahmen verbindendenFigure 2 shows an embodiment of the connecting to the side frame
Gelenkhebels im Vertikalschnitt,Articulated lever in vertical section,
Figur 3 eine angepaßte Ausführungsform des mit dem Rad zu verbindenden Gelenkhebels im Vertikalschnitt,FIG. 3 shows an adapted embodiment of the articulated lever to be connected to the wheel in vertical section,
Figur 4 einen Vertikalschnitt im Bereich der Schwenkwelle,FIG. 4 shows a vertical section in the region of the swivel shaft,
Figur 5 einen Vertikalschnitt im Bereich der Druckfeder.5 shows a vertical section in the region of the compression spring.
Bei dem in Figur 1 vereinfacht dargestellten Ausführungsbeispiel der Erfindung besteht der Seitenrahmen 1 im wesentlichen aus einem gebogenen Rohr, das vorne mit einem Steuerkopfrohr 18 für das lenkbare Schwenkrad 2 und hinten mit einem Gelenkhebel 6 des Federgelenks 19 verbunden ist. Dieser Gelenkhebel 6 ist in der Gelenkachse 20 über eine Schwenkwelle 7 mit einem Gelenkhebel 5 gelenkig verbunden, der seinerseits am Motor 4 befestigt ist, der zusammen mit dem Rad oder Antriebsrad 3 eine nicht gefederte Baueinheit bildet. Zwischen den Gelenkhebeln 5 und 6 ist als Federelement 21 eine Druckfeder 8 eingespannt, wodurch der Seitenrahmen 1 relativ zur Achse 9 des Rades oder Antriebsrades 3 federnd gelagert ist.In the embodiment of the invention shown in simplified form in FIG. 1, the side frame 1 essentially consists of a bent tube which is connected at the front to a control head tube 18 for the steerable swivel wheel 2 and at the rear to an articulated lever 6 of the spring joint 19. This hinge lever 6 is in the hinge axis 20 via a pivot shaft 7 with a Articulated lever 5 articulated, which in turn is attached to the motor 4, which together with the wheel or drive wheel 3 forms an unsprung unit. A compression spring 8 is clamped as a spring element 21 between the articulated levers 5 and 6, as a result of which the side frame 1 is spring-mounted relative to the axis 9 of the wheel or drive wheel 3.
Der Gelenkhebel 6 besteht bei der dargestellten Ausführungsform gemäß Figur 2 vorzugsweise aus einem kappenartigen Guß- oder Schmiedeteil mit einer Querbohrung 10 für die Lagerung der Schwenkwelle sowie mit einem Sitz 11a für die Zentrierung der Druckfeder 8. Im Bereich zwischen dem Sitz 11a und der Querbohrung 10 befindet sich im Innenraum ein Ansatz als Anschlag 24. Die Wandung 26 ist bogenförmig um die Querbohrung 10 nach unten herumgezogen und endet als Anschlag 22.In the illustrated embodiment according to FIG. 2, the articulated lever 6 preferably consists of a cap-like cast or forged part with a transverse bore 10 for the mounting of the pivot shaft and with a seat 11a for centering the compression spring 8. In the area between the seat 11a and the transverse bore 10 there is an attachment in the interior as a stop 24. The wall 26 is drawn downward in an arc around the transverse bore 10 and ends as a stop 22.
Der zugehörige Gelenkhebel 5 (Fig. 3) besteht vorzugsweise ebenfalls aus einem Guß- oder Schmiedeteil mit einer Querbohrung 12 für die Aufnahme der Schwenkwelle 7 sowie mit einem Zentriersitz 11b für die Druckfeder 8. Im Gelenkhebel 5 sind außerdem noch vertikale Bohrungen 13 für den Durchgriff von Befestigungsschrauben vorgesehen.The associated articulated lever 5 (FIG. 3) preferably also consists of a cast or forged part with a transverse bore 12 for receiving the pivot shaft 7 and with a centering seat 11b for the compression spring 8. In the articulated lever 5 there are also vertical bores 13 for the passage provided by fastening screws.
Beide Gelenkhebel 5,6 wirken in der Weise zusammen, daß der kappenartige Gelenkhebel 6 den Gelenkhebel 5 teilweise übergreift, wobei die Anschläge 22,23 in der maximalen Öffnungsstellung des Federgelenks und die Anschläge 24,25 in der Minimalstellung aufeinanderliegen.Both articulated levers 5, 6 work together in such a way that the cap-like articulated lever 6 partially overlaps the articulated lever 5, the stops 22, 23 lying one on top of the other in the maximum open position of the spring joint and the stops 24, 25 in the minimum position.
Aus der Schnittdarstellung gemäß Figur 4 ist ersichtlich, wie der im Querschnitt U-förmig ausgebildete Gelenkhebel 6 den Gelenkhebel 5 im Bereich der Schwenkwelle 7 übergreift. Zur Schwenkwelle 7 gehören bei dem dargestellten Ausführungsbeispiel ein Schraubbolzen 16 mit Mutter 17 sowie eine Distanzhülse 15 und eine Buchse 14 mit Gleitlagereigenschaften. Im Bereich der Druckfeder 8 sind gemäß Figur 5 beide Gelenkhebel 5, 6 im Querschnitt U-förmig sowie mit Zentriersitzen 11a und 11b für die Druckfeder 8 ausgebildet. Dabei können die einander gegenüberliegenden Schenkel der U- förmigen Querschnitte der Gelenkhebel 5, 6 als Anschläge 24,25 zur Begrenzung der maximalen Kompression der Druckfeder 8 ausgebildet sein. Durch die Anschläge 22,23 (Fign. 2 und 3) an den Gelenkhebeln 5, 6 wird die maximale Expansion der Druckfeder 8 derart begrenzt werden, daß auch bei maximalem Abstand der Enden der Gelenkhebel 5, 6 noch eine ausreichende Vorspannung vorhanden ist, um die Druckfeder 8 unverlierbar zwischen den beiden Gelenkhebeln 5, 6 halten zu können. 4 shows how the articulated lever 6, which is U-shaped in cross section, engages over the articulated lever 5 in the region of the pivot shaft 7. In the illustrated embodiment, the swivel shaft 7 includes a screw bolt 16 with a nut 17 as well as a spacer sleeve 15 and a bush 14 with slide bearing properties. In the area of the compression spring 8, according to FIG. 5, both articulated levers 5, 6 are U-shaped in cross section and with centering seats 11a and 11b for the compression spring 8. The opposite legs of the U-shaped cross sections of the articulated levers 5, 6 can be designed as stops 24, 25 to limit the maximum compression of the compression spring 8. The stops 22, 23 (FIGS. 2 and 3) on the articulated levers 5, 6 will limit the maximum expansion of the compression spring 8 in such a way that sufficient prestress is still present even at the maximum distance between the ends of the articulated levers 5, 6 to be able to hold the compression spring 8 captively between the two articulated levers 5, 6.
Bezugszeichenreference numeral
1 Seitenrahmen1 side frame
Schwenkradcaster
Antriebsraddrive wheel
Motorengine
Gelenkhebelarticulated lever
Gelenkhebelarticulated lever
Schwenkwellepivot shaft
Druckfedercompression spring
Achseaxis
10 Querbohrung l la,b Zentriersitz10 cross hole l la, b centering seat
12 Querbohrung12 cross hole
13 vertikale Bohrung13 vertical hole
14 Buchse14 socket
15 Distanzhülse15 spacer sleeve
16 Schraubbolzen16 bolts
17 Mutter17 mother
18 Steuerkopfrohr18 control head tube
19 Federgelenk19 spring joint
20 Gelenkachse20 hinge axis
21 Federelement21 spring element
22 Anschlag22 stop
23 Anschlag23 stop
24 Anschlag24 stop
25 Anschlag25 stop
26 Wandung 26 wall

Claims

Patentansprüche claims
1. Rollstuhl, insbesondere faltbarer Rollstuhl, mit1. Wheelchair, especially foldable wheelchair, with
zwei spiegelbildlich zueinander angeordneten Seitenrahmen (1), an denen je ein durchmesserkleines lenkbares Schwenkrad (2) sowie ein durchmessergroßes nicht lenkbares Rad oder Antriebsrad (3) mit Motor (4) als Baueinheit gelagert ist, und mittwo mirror images of each other arranged side frames (1), on each of which a small-diameter steerable swivel wheel (2) and a large-diameter non-steerable wheel or drive wheel (3) with motor (4) as a structural unit is mounted, and with
Querstreben zur starren oder klappbaren Verbindung der Seitenrahmen (1),Cross struts for rigid or foldable connection of the side frames (1),
wobei jeder Seitenrahmen (1) über eine Federeinrichtung mit dem Rad oder der Baueinheit verbunden ist, dadurch gekennzeichnet, daß die Federeinrichtung ein sich an dem Rad oder der Baueinheit abstützendes Federgelenk (19) mit einem Federelement (21) ist, wobei die Gelenkachse (20) exzentrisch zur Radachse (9) angeordnet ist.wherein each side frame (1) is connected to the wheel or the structural unit via a spring device, characterized in that the spring device is a spring joint (19) supported on the wheel or the structural unit with a spring element (21), the articulated axis (20 ) is arranged eccentrically to the wheel axle (9).
2. Rollstuhl nach Anspruch 1, dadurch gekennzeichnet, daß das Federelement (21) des Federgelenks (19) über der Achse (9) des Rades oder Antriebsrades (3) angeordnet ist.2. Wheelchair according to claim 1, characterized in that the spring element (21) of the spring joint (19) over the axis (9) of the wheel or drive wheel (3) is arranged.
3. Rollstuhl nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß der Seitenrahmen (1) zwischen Gelenkachse (20) und Federelement (21) am Federgelenk (19) befestigt ist.3. Wheelchair according to one of claims 1 or 2, characterized in that the side frame (1) between the hinge axis (20) and spring element (21) is fixed to the spring joint (19).
4. Rollstuhl nach Anspruch 1, dadurch gekennzeichnet, daß das Federgelenk (19) aus einem ersten, mit dem Rad oder Antriebsrad (3) oder der Baueinheit verbundenen Gelenkhebel (5), einem zweiten, mit dem Seitenrahmen (1) verbundenen Gelenkhebel (6), einer beide Gelenkhebel (5, 6) an einem Ende in der Gelenkachse (20) gelenkig miteinander verbindenden Schwenkwelle (7) und einer zwischen dem anderen Ende der Gelenkhebel (5, 6) eingespannten Druckfeder (8) besteht.4. Wheelchair according to claim 1, characterized in that the spring joint (19) from a first, with the wheel or drive wheel (3) or the structural unit connected articulated lever (5), a second, with the side frame (1) connected articulated lever (6 ), one both Articulated lever (5, 6) at one end in the articulated axis (20) pivotally connecting pivot shaft (7) and a compression spring (8) clamped between the other end of the articulated lever (5, 6).
5. Rollstuhl nach Anspruch 4, dadurch gekennzeichnet, daß die Schwenkwelle (7) horizontal quer zur Fahrtrichtung und in Fahrtrichtung gesehen vor der Achse (9) des Rades oder Antriebsrades (3) angeordnet ist.5. Wheelchair according to claim 4, characterized in that the pivot shaft (7) is arranged horizontally transversely to the direction of travel and viewed in the direction of travel in front of the axis (9) of the wheel or drive wheel (3).
6. Rollstuhl nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß die Druckfeder (8) im wesentlichen senkrecht oberhalb der Achse (9) des Rades oder Antriebsrades (3) zwischen den Gelenkhebeln (5, 6) eingespannt ist.6. Wheelchair according to one of claims 4 or 5, characterized in that the compression spring (8) is clamped substantially vertically above the axis (9) of the wheel or drive wheel (3) between the articulated levers (5, 6).
7. Rollstuhl nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß der Schwenkwinkel der Gelenkhebel (5, 6) durch Anschläge (22,23,24,25) derart eingeschränkt ist, daß die Druckfeder (8) bei maximalem relativen Abstand der Enden der Gelenkhebel (5, 6) zueinander noch eine Mindest- Vorspannung aufweist und daß der minimale relative Abstand der Enden der Gelenkhebel (5, 6) nicht durch die Abmessungen der Druckfeder (8) bestimmt wird. 7. Wheelchair according to one of claims 4 to 6, characterized in that the pivot angle of the articulated lever (5, 6) is limited by stops (22,23,24,25) such that the compression spring (8) at a maximum relative distance of the Ends of the articulated lever (5, 6) to each other still has a minimum bias and that the minimum relative distance between the ends of the articulated lever (5, 6) is not determined by the dimensions of the compression spring (8).
PCT/EP2000/005145 1999-07-09 2000-06-06 Suspension wheel chair WO2001003632A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU54024/00A AU5402400A (en) 1999-07-09 2000-06-06 Suspension wheel chair
EP00938759A EP1196125A1 (en) 1999-07-09 2000-06-06 Suspension wheel chair

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19932109.4 1999-07-09
DE19932109A DE19932109C1 (en) 1999-07-09 1999-07-09 Spring suspension for a wheelchair has a spring joint to support the wheel or wheel structure with a spring unit over the wheel axis which can be fitted to folding wheelchairs

Publications (1)

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WO2001003632A1 true WO2001003632A1 (en) 2001-01-18

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Application Number Title Priority Date Filing Date
PCT/EP2000/005145 WO2001003632A1 (en) 1999-07-09 2000-06-06 Suspension wheel chair

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EP (1) EP1196125A1 (en)
AU (1) AU5402400A (en)
DE (1) DE19932109C1 (en)
WO (1) WO2001003632A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103349598B (en) * 2013-07-19 2016-05-18 浙江联宜电机股份有限公司 Wheel drive five hanging systems in electric wheel-chair vehicle

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3968991A (en) * 1972-11-01 1976-07-13 Gannet Holdings Limited Collapsible seat structures
US4078817A (en) * 1976-06-10 1978-03-14 Reme Enterprises, Inc. Shock absorber attachment for wheelchairs or the like
GB2177981A (en) * 1985-07-25 1987-02-04 Colin Leslie Hearl Wood Vehicle wheel suspension
DE4420877A1 (en) 1994-06-15 1995-12-21 Invacare Deutschland Gmbh wheelchair

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8805610U1 (en) * 1988-04-28 1988-07-07 Guenter Meier Gmbh, 4952 Porta Westfalica, De
FR2685866B1 (en) * 1992-01-03 1997-08-29 Cophignon Jacques ASSEMBLY OF SHOCK ABSORBERS FOR WHEELCHAIRS FOR THE DISABLED.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968991A (en) * 1972-11-01 1976-07-13 Gannet Holdings Limited Collapsible seat structures
US4078817A (en) * 1976-06-10 1978-03-14 Reme Enterprises, Inc. Shock absorber attachment for wheelchairs or the like
GB2177981A (en) * 1985-07-25 1987-02-04 Colin Leslie Hearl Wood Vehicle wheel suspension
DE4420877A1 (en) 1994-06-15 1995-12-21 Invacare Deutschland Gmbh wheelchair

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DE19932109C1 (en) 2000-08-24
AU5402400A (en) 2001-01-30
EP1196125A1 (en) 2002-04-17

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