EP0339500B1 - Wheel chair - Google Patents

Wheel chair Download PDF

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Publication number
EP0339500B1
EP0339500B1 EP89107186A EP89107186A EP0339500B1 EP 0339500 B1 EP0339500 B1 EP 0339500B1 EP 89107186 A EP89107186 A EP 89107186A EP 89107186 A EP89107186 A EP 89107186A EP 0339500 B1 EP0339500 B1 EP 0339500B1
Authority
EP
European Patent Office
Prior art keywords
chair frame
drive
wheel
wheelchair
wheels
Prior art date
Legal status (The legal status 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 status listed.)
Revoked
Application number
EP89107186A
Other languages
German (de)
French (fr)
Other versions
EP0339500A2 (en
EP0339500A3 (en
Inventor
Günter Meier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUENTER MEIER GmbH
Original Assignee
GUENTER MEIER GmbH
Guenter Meier 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6823460&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0339500(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by GUENTER MEIER GmbH, Guenter Meier GmbH filed Critical GUENTER MEIER GmbH
Priority to AT89107186T priority Critical patent/ATE86093T1/en
Publication of EP0339500A2 publication Critical patent/EP0339500A2/en
Publication of EP0339500A3 publication Critical patent/EP0339500A3/en
Application granted granted Critical
Publication of EP0339500B1 publication Critical patent/EP0339500B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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 for the disabled and the sick, in which two wheels are each connected to an electric motor drive and each of the two driven wheels is cushioned against the chair frame.
  • each wheel is rotatably mounted on an additional rocker arm, which ends at one end is pivotally mounted on the chair joint and is at the other end connected to a shock absorber arranged between the chair frame and the swing arm.
  • the drive is housed in the swing arm, which must have a special box profile.
  • the object of the invention is to provide a simplified suspension design for the rear wheels of a wheelchair with a uniform drive and wheel contact holder with the road even with bumps, so that the wheelchair shows a safe driving property.
  • the drive for each rear wheel is located directly on the wheel axle and the drive with the rear wheel is cushioned directly by the shock absorber, which simplifies the design and makes it more cost-effective, but still gives a very good function.
  • the drives are secured against rotation and their movable connection relative to the chair frame is achieved in a simple manner by means of ball-and-socket rods.
  • the cushioning is formed by simple and cost-saving telescopic springs, which are articulated between the drive and the chair frame.
  • each driven wheel (1) with its associated drive (2) is designed to be separately cushioned relative to the chair frame (3).
  • a telescopic spring in the form of a gas pressure spring or a shock absorber is provided as the suspension (4).
  • the spring (4) for each driven wheel (1) has one end in a joint (5) of the drive (2) sitting on the wheel axle (6) and the other end in a joint (7) on the chair frame (3 ) fixed, whereby the wheel (1) with drive (2) is resiliently mounted with respect to the chair frame (3).
  • the two rear wheels (1) of the wheelchair are each driven by an electric motor by a drive (2) and cushioned against the chair frame (3).
  • the two drives (2) are movably connected to the chair frame (3) by means of ball-and-socket rods (8), which compensates for the spring movements of the wheels (1) in relation to the chair frame (3) if the road surface is uneven.
  • the ball joint rods (8) are articulated with a length end in the center area of the wheelchair on a strut (3a) of the chair frame (3) and with the other length end on a drive (2).
  • the wheelchair is equipped with a sprung double drive as the drive system.

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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)
  • Invalid Beds And Related Equipment (AREA)
  • Handcart (AREA)
  • Materials For Medical Uses (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Automatic Cycles, And Cycles In General (AREA)

Abstract

In the wheelchair for handicapped and sick patients, which is driven by an electric motor, each driven wheel (1) with its drive (2) is provided with a separate suspension relative to the chair frame (3), a telescopic spring in the form of a gas compression spring, a shock absorber or the like being provided as the suspension (4) for each driven wheel (1). The spring (4) engages with one end in a joint of the drive (2), seated on the wheel axle (6), and is secured by the other end in a joint (7) on the chair frame (3). In a preferred manner, the two rear wheels (1) are driven and are provided with a spring suspension relative to the chair frame (3). <IMAGE>

Description

Die Erfindung bezieht sich auf einen Rollstuhl für Behinderte und Kranke, bei dem zwei Räder mit je einem elektromotorischen Antrieb verbunden sind und jedes der beiden angetriebenen Räder gegenüber dem Stuhlgestell abgefedert gelagert ist.The invention relates to a wheelchair for the disabled and the sick, in which two wheels are each connected to an electric motor drive and each of the two driven wheels is cushioned against the chair frame.

Bei einem derartig ausgeführten, aus der DE-A 3 414 204 bekannt gewordenen Rollstuhl sind die Räder einzeln angetrieben und abgefedert, wobei die Antriebs- und Federausführung verhältnismäßig aufwendig und somit kostenspielig ist, denn jedes Rad ist an einer zusätzlichen Schwinge drehbar gelagert, die einenends am Stuhlgelenk schwenkbar lagert und anderenends mit einem zwischen Stuhlgestell und Schwinge angeordneten Stoßdämpfer federnd verbunden ist.
Weiterhin ist der Antrieb hierbei in der Schwinge untergebracht, die dafür ein besonderes Kastenprofil haben muß.In a wheelchair designed in this way, known from DE-A 3 414 204, the wheels are individually driven and cushioned, the drive and spring design being relatively complex and therefore costly, because each wheel is rotatably mounted on an additional rocker arm, which ends at one end is pivotally mounted on the chair joint and is at the other end connected to a shock absorber arranged between the chair frame and the swing arm.
Furthermore, the drive is housed in the swing arm, which must have a special box profile.

Aufgabe der Erfindung ist die Schaffung einer vereinfachten Abfederungsausführung für die Hinterräder eines Rollstuhles bei gleichmäßigem Antrieb und Radkontakthalterung mit der Fahrbahn auch bei Unebenheiten, so daß der Rollstuhl eine sichere Fahreigenschaft zeigt.The object of the invention is to provide a simplified suspension design for the rear wheels of a wheelchair with a uniform drive and wheel contact holder with the road even with bumps, so that the wheelchair shows a safe driving property.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des einzigen Patentanspruches gelöst.This object is achieved by the characterizing features of the only claim.

Der Antrieb für jedes Hinterrad sitzt direkt auf der Radachse und der Antrieb mit Hinterrad wird direkt durch den Stoßdämpfer abgefedert, was die Konstruktion vereinfacht und kostengünstiger macht und trotzdem eine sehr gute Funktion ergibt. Die Verdrehsicherung der Antriebe und deren bewegliche Verbindung gegenüber dem Stuhlgestell wird in einfacher Weise durch Kugelgelenkstangen erzielt.The drive for each rear wheel is located directly on the wheel axle and the drive with the rear wheel is cushioned directly by the shock absorber, which simplifies the design and makes it more cost-effective, but still gives a very good function. The drives are secured against rotation and their movable connection relative to the chair frame is achieved in a simple manner by means of ball-and-socket rods.

Durch die separate Abfederung der angetriebenen Rollstuhlräder gleichen diese unabhängig voneinander die Fahrbahnunebenheiten aus und bleiben dadurch stets mit der Fahrbahn in Kontakt, was einen gleichmäßigen Antrieb des Rollstuhles bewirkt und eine einwandfreie Lenkmöglichkeit ergibt.Due to the separate cushioning of the driven wheelchair wheels, they compensate for the unevenness of the road independently of one another and thus always remain in contact with the road, which results in a uniform drive of the wheelchair and results in perfect steering.

Hierdurch erhält die den Rollstuhl benutzende Person ein sicheres Fahrverhalten und durch die Abfederung zwischen angetriebenen Rädern und Stuhlgestell eine optimale Sitzeigenschaft.This gives the person using the wheelchair safe driving behavior and the cushioning between the driven wheels and the chair frame gives them optimal seating properties.

Die Abfederung ist von einfachen und kostensparenden Teleskopfedern gebildet, die gelenkig zwischen Antrieb und Stuhlgestell angeordnet sind.The cushioning is formed by simple and cost-saving telescopic springs, which are articulated between the drive and the chair frame.

Auf der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt, welches nachfolgend näher erläutert wird.
Es zeigt:

Fig. 1
eine Seitenansicht eines Rollstuhles mit zwischen Antrieb der Hinterräder und dem Stuhlgestell angeordneter Federung,
Fig. 2
eine Rückansicht des Rollstuhles mit den beiden Antrieben für jeweils ein Rad und der für jeden Antrieb vorgesehenen Federung.
In the drawing, an embodiment of the invention is shown, which is explained in more detail below.
It shows:
Fig. 1
a side view of a wheelchair with suspension arranged between the drive of the rear wheels and the chair frame,
Fig. 2
a rear view of the wheelchair with the two drives for one wheel and the suspension provided for each drive.

Bei dem elektromotorisch angetriebenen Rollstuhl für Behinderte und Kranke ist jedes angetriebene Rad (1) mit seinem zugeordneten Antrieb (2) gegenüber dem Stuhlgestell (3) separat abgefedert ausgebildet.In the electric motor-driven wheelchair for the disabled and the sick, each driven wheel (1) with its associated drive (2) is designed to be separately cushioned relative to the chair frame (3).

Als Federung (4) ist dabei jeweils eine Teleskopfeder in Form einer Gasdruckfeder oder eines Stoßdämpfers vorgesehen. Die Feder (4) für jedes angetriebene Rad (1) ist dabei mit einem Ende in einem Gelenk (5) des auf der Radachse (6) sitzenden Antriebes (2) und mit seinem anderen Ende in einem Gelenk (7) am Stuhlgestell (3) festgelegt, wodurch das Rad (1) mit Antrieb (2) gegenüber dem Stuhlgestell (3) federnd gelagert ist.A telescopic spring in the form of a gas pressure spring or a shock absorber is provided as the suspension (4). The spring (4) for each driven wheel (1) has one end in a joint (5) of the drive (2) sitting on the wheel axle (6) and the other end in a joint (7) on the chair frame (3 ) fixed, whereby the wheel (1) with drive (2) is resiliently mounted with respect to the chair frame (3).

In bevorzugter Weise sind die beiden Hinterräder (1) des Rollstuhles durch je einen Antrieb (2) elektromotorisch angetrieben und gegenüber dem Stuhlgestell (3) abgefedert.Preferably, the two rear wheels (1) of the wheelchair are each driven by an electric motor by a drive (2) and cushioned against the chair frame (3).

Die beiden Antriebe (2) sind über Kugelgelenkstangen (8) mit dem Stuhlgestell (3) beweglich verbunden, wodurch die bei Unebenheiten in der Fahrbahn auftretenden Federbewegungen der Räder (1) gegenüber dem Stuhlgestell (3) ausgeglichen werden.The two drives (2) are movably connected to the chair frame (3) by means of ball-and-socket rods (8), which compensates for the spring movements of the wheels (1) in relation to the chair frame (3) if the road surface is uneven.

Durch diese Kugelgelenkstangen (8) werden gleichzeitig die auf den Radachsen (6) sitzenden Antriebe (2) gegen axiales Verdrehen gesichert.These ball joint rods (8) at the same time secure the drives (2) seated on the wheel axles (6) against axial rotation.

Die Kugelgelenkstangen (8) sind mit einem Längenende im Mittenbereich des Rollstuhles an einer Strebe (3a) des Stuhlgestelles (3) und mit dem anderen Längenende an einem Antrieb (2) angelenkt.The ball joint rods (8) are articulated with a length end in the center area of the wheelchair on a strut (3a) of the chair frame (3) and with the other length end on a drive (2).

Der Rollstuhl ist erfindungsgemäß mit einem abgefederten Doppelantrieb als Antriebssystem ausgestattet.According to the invention, the wheelchair is equipped with a sprung double drive as the drive system.

Claims (1)

  1. Wheelchair for disabled persons and invalids, on which two wheels are connected to a respective motor-operated drive and each of the two powered wheels is suspension-mounted relative to the chair frame, characterised in that
    - the two rear wheels (1) are powered,
    - an electric drive unit (2) sits on the wheel axle (6) of each rear wheel (1),
    - the resilient mounting of each rear wheel (1) is constituted by a telescoping spring (4) in the form of a gas pressure spring or a shock absorber with one end articulated in an axle (5) of the drive unit (2) and with the other end articulated in an axle (7) of the chair frame (3),
    and
    - the two drives (2) are movably linked to the chair frame (3) by way of respective ball-jointed bars (8) articulated with one end at the drive (2) and the other end at a central strut (3a) forming part of the chair frame, and are secured against axial torsion with respect to said chair frame.
EP89107186A 1988-04-28 1989-04-21 Wheel chair Revoked EP0339500B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89107186T ATE86093T1 (en) 1988-04-28 1989-04-21 WHEELCHAIR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8805610U DE8805610U1 (en) 1988-04-28 1988-04-28 wheelchair
DE8805610U 1988-04-28

Publications (3)

Publication Number Publication Date
EP0339500A2 EP0339500A2 (en) 1989-11-02
EP0339500A3 EP0339500A3 (en) 1990-02-14
EP0339500B1 true EP0339500B1 (en) 1993-03-03

Family

ID=6823460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107186A Revoked EP0339500B1 (en) 1988-04-28 1989-04-21 Wheel chair

Country Status (4)

Country Link
EP (1) EP0339500B1 (en)
AT (1) ATE86093T1 (en)
DE (2) DE8805610U1 (en)
ES (1) ES2037901T3 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8910975B2 (en) 2007-02-14 2014-12-16 Invacare Corporation Wheelchair with suspension
US8925943B2 (en) 2001-10-10 2015-01-06 Invacare Corp. Wheelchair suspension
US9010470B2 (en) 2009-10-09 2015-04-21 Invacare Corporation Wheelchair suspension
US9149398B2 (en) 2000-10-27 2015-10-06 Invacare Corporation Obstacle traversing wheelchair
US9308143B2 (en) 2012-02-15 2016-04-12 Invacare Corporation Wheelchair suspension
US9364377B2 (en) 2002-10-25 2016-06-14 Invacare Corporation Suspension for wheeled vehicles

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005649A1 (en) * 1988-11-17 1990-05-31 Invacare Corporation Powered wheelchair having transversely mounted drive mechanism
US5180025A (en) * 1991-12-13 1993-01-19 Yeh Bean Shung Wheeled-chair chassis with a suspension mechanism
FR2685866B1 (en) * 1992-01-03 1997-08-29 Cophignon Jacques ASSEMBLY OF SHOCK ABSORBERS FOR WHEELCHAIRS FOR THE DISABLED.
NL9202183A (en) * 1992-12-17 1994-07-18 Seenus Nl Bv R Van Wheelchair.
NL9300063A (en) * 1993-01-13 1994-08-01 Ligtvoet Products Bv Wheelchair.
US5518081A (en) * 1993-07-15 1996-05-21 Thibodeau; Bryan H. All-terrain, all-weather wheelchair
US5575348A (en) * 1994-04-15 1996-11-19 Invacare Corporation Powered wheelchair with adjustable center of gravity and independent suspension
DE4420877C2 (en) 1994-06-15 2001-09-20 Invacare Deutschland Gmbh wheelchair
DE19932109C1 (en) * 1999-07-09 2000-08-24 Invacare Deutschland Gmbh 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
US11213441B2 (en) 2002-10-25 2022-01-04 Invacare Corporation Suspension for wheeled vehicles
DK2277490T3 (en) 2007-02-08 2015-04-13 Invacare Corp Wheelchair suspension
CN105496668A (en) * 2014-09-26 2016-04-20 广东凯洋医疗科技集团有限公司 Hub fast clutch device for electric wheelchair
AU2021228590A1 (en) 2020-02-25 2022-09-22 Invacare Corporation Wheelchair and suspension systems

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2110269C2 (en) * 1971-03-04 1983-03-17 Fa. Wilhelm Meyer, 4973 Vlotho Servo drive for folding wheelchair - has sprung drive dogs to disengage wheel drive and remove power unit
US4190263A (en) * 1978-05-22 1980-02-26 Albuquerque Patents, Ltd. Wheelchair with shock absorber
DE3414204A1 (en) * 1984-04-14 1985-10-24 Horst 4970 Bad Oeynhausen Lindenkamp Small vehicle, in particular for disabled persons

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9149398B2 (en) 2000-10-27 2015-10-06 Invacare Corporation Obstacle traversing wheelchair
US8925943B2 (en) 2001-10-10 2015-01-06 Invacare Corp. Wheelchair suspension
US9370455B2 (en) 2001-10-10 2016-06-21 Invacare Corporation Wheelchair suspension
US9364377B2 (en) 2002-10-25 2016-06-14 Invacare Corporation Suspension for wheeled vehicles
US8910975B2 (en) 2007-02-14 2014-12-16 Invacare Corporation Wheelchair with suspension
US9346335B2 (en) 2007-02-14 2016-05-24 Invacare Corporation Stability control system
US11850906B2 (en) 2007-02-14 2023-12-26 Invacare Corporation Stability control system
US9010470B2 (en) 2009-10-09 2015-04-21 Invacare Corporation Wheelchair suspension
US9913768B2 (en) 2009-10-09 2018-03-13 Invacare Corporation Wheelchair suspension
US9308143B2 (en) 2012-02-15 2016-04-12 Invacare Corporation Wheelchair suspension

Also Published As

Publication number Publication date
ATE86093T1 (en) 1993-03-15
ES2037901T3 (en) 1993-07-01
DE8805610U1 (en) 1988-07-07
EP0339500A2 (en) 1989-11-02
DE58903629D1 (en) 1993-04-08
EP0339500A3 (en) 1990-02-14

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