EP1839637A1 - Suspension pour des fauteuils roulants, ou pour des moyens similaires de transport - Google Patents

Suspension pour des fauteuils roulants, ou pour des moyens similaires de transport Download PDF

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Publication number
EP1839637A1
EP1839637A1 EP06111951A EP06111951A EP1839637A1 EP 1839637 A1 EP1839637 A1 EP 1839637A1 EP 06111951 A EP06111951 A EP 06111951A EP 06111951 A EP06111951 A EP 06111951A EP 1839637 A1 EP1839637 A1 EP 1839637A1
Authority
EP
European Patent Office
Prior art keywords
fork
wheel
suspension according
wheel suspension
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.)
Withdrawn
Application number
EP06111951A
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German (de)
English (en)
Inventor
Kurt Hunziker
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.)
Reha-Hunziker AG
Original Assignee
Reha-Hunziker AG
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 Reha-Hunziker AG filed Critical Reha-Hunziker AG
Priority to EP06111951A priority Critical patent/EP1839637A1/fr
Publication of EP1839637A1 publication Critical patent/EP1839637A1/fr
Withdrawn legal-status Critical Current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
    • A61G5/06—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
    • 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
    • A61G5/063—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 with eccentrically mounted wheels
    • 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

Definitions

  • the present invention relates to a wheel suspension for wheelchairs, trolleys and other means of transport and serves to facilitate overcoming obstacles, such as rhinestones, door sills and the like.
  • the vehicle will experience a sudden deceleration when it hits the obstacle, absorbing the energy of the impact from the front of the vehicle and causing a shock in the case of a wheelchair can be painful for the wheelchair patient, or can move the transport goods in a trolley.
  • a shock in the case of a wheelchair can be painful for the wheelchair patient, or can move the transport goods in a trolley.
  • Wheel systems described that give a vehicle equipped with a cross-country mobility.
  • the wheels systems include angled horizontal fork-like fork assemblies with two different length fork parts, at the ends of each a wheel with the same or different large diameter is arranged on an axis.
  • the fork assembly is pivotally mounted at the angle peak between the two aligned at an obtuse angle forks with a parallel to the wheel axes axis of rotation on the vehicle.
  • the front wheel which is smaller than the rear wheel, lifted by a convenient suspension from the ground.
  • the wheel assembly is intended for the use of agricultural vehicles, such as vineyard tugs and the like, with provision for hydraulically controlling the position of the sprung fork assembly to optimally adapt it to uneven terrain.
  • An analogue adapted system was also proposed for electric wheelchairs, so that they can overcome smaller obstacles, such as curbs, door sills and the like, better.
  • the parameters such as the extent of the lowering of the front wheel and the power transmission, which are determinative, in the known wheel suspensions too little adaptable and there is a need for their improvement.
  • the suspension is intended for means of transport, in particular for motorized or non-motorized wheelchairs.
  • the hangers When mounted on the front or rear of the means of transport, the hangers make it easier to negotiate obstacles whose height may be greater than the radius of the wheel and to travel on uneven surfaces.
  • the suspension has at least one set of two successively arranged wheels, which are located in a vertical directional direction of the plane.
  • twin wheels are used in each case for the front and rear wheels, between which one-armed fork elements are attached.
  • the twin wheels have Furthermore, the advantage that they are optimally aligned when hitting an obstacle. As a result, the climbing process begins only when both twin wheels hit the obstacle.
  • Embodiments with a climbing wheel and a twin wheel as a supporting wheel can also fulfill the objects of the present invention.
  • One wheel versions are also suitable, but without the benefit of alignment.
  • the front wheel with respect to the direction of travel which is referred to in this specification as “Steigrad” has a distance from the driving plane.
  • the rear wheel relative to the direction of travel (also referred to below as the “supporting wheel") is intended for carrying on the driving level.
  • the front and rear wheels are stored separately in a first and second fork element.
  • the fork elements which may also be referred to as rockers, are pivotally mounted on a common clevis at first and second pivot axes which are offset from each other in a vertical direction.
  • the first (rear) fork element is directed substantially downwards in the rest position, preferably at an angle of 10 ° to 30 ° from vertical to rear, and the second (front) fork element is in the rest position, depending on the embodiment, usually in an angular range approximately from the horizontal to about 45 ° obliquely downward and is aligned with respect to the direction of travel forward.
  • One of the fork elements, in particular the rear is held on the pivot axis by a spring means in a rest position.
  • a so-called ROSTA® element is preferably used, which impresses with its simplicity and freedom from maintenance. These elements are suitable for spring-loaded rotations of +/- 30 °.
  • a used ROSTA element is slightly biased during installation by the insertion of a stop on the fork element so that it is stable in the rest position and no unwanted vibrations occur.
  • other spring systems such as torsion bars, hydraulic spring systems, and the like may be used.
  • the common clevis includes a fastener for its about a vertical axis rotatable or rigid attachment to a chassis of a wheelchair or other transport device.
  • the first and the second fork element are mechanically or hydraulically connected to each other, for example by a connecting lever via joints, or by a toothed gear, so that a pivoting movement of a fork element is transmitted to the other. Due to the geometry of the fork elements and their operative connection, the position of the climbing wheel with respect to the driving plane can be influenced as a function of the pivoting movement of the first fork element. For example, the length of the connecting lever and the position of the joints on the fork elements (distance between the joints of the pivot axes of the fork elements) can be suitably adjusted.
  • FIG. 1 is a perspective overview drawing of an embodiment of a suspension 1 according to the invention with twin wheels. It has twin wheels 2 and twin wheels 4.
  • the supporting twin wheels 2, here equipped with rims and tires, are mounted on a common axis of rotation 3, which is arranged terminally on a first fork part 6.
  • the first fork part 6 is pivotally mounted on the fork head 14 and sprung, such that the fork part in turn returns after pivoting by spring force in the original rest position.
  • the twin climbing wheels 4, which are slightly smaller here than the supporting twin wheels 2, are mounted on a second axis of rotation 5 on the second fork part 7.
  • the first fork part 6 is attached to a first pivot axis 8 on the clevis 14.
  • the pivot axis 8 of the first fork part is sprung by an elastomer spring device 9, preferably by a so-called. ROSTA element, which also defines the pivot axis 8.
  • the two fork parts 6, 7, ie the first and the second fork part, are connected to a transmission lever 11 via the joints 12 (not visible in this figure) and 13.
  • a pivoting movement of the first fork part 6 thus necessarily leads to a corresponding rectified pivotal movement of the second fork part 7.
  • This movement is dependent on the length of the transmission lever 11 and the position of the joints 12 and 13 on the fork parts 6 and 7.
  • the fork head 14 is at his upper end mounted in a vertical axis 15. This is intended for a rotatable arrangement on a chassis, wherein a storage in suitable storage means is possible, so that equipped with such suspensions Transport is steerable.
  • the illustrated suspension is provided with a fender 17 which is fixed to the first fork part 6.
  • Fig. 2 is a sectional view in the vertical plane A-A in Fig. 3 and shows an embodiment of an inventive suspension 1 with twin wheels, of which only one wheel is visible here. It has a supporting wheel 2 and a Steigrad 4.
  • the supporting wheel is mounted on a rotation axis 3, which is arranged terminally on a first fork part 6.
  • a fender 17 is integrated.
  • the first fork part is pivotally and spring mounted at the other end of the fork head 14, such that the fork member 6 returns after pivoting by the spring means in turn to the original rest position.
  • the Steigrad 4 is mounted on a second axis of rotation 5 terminal on the second fork part 7.
  • the second fork part 7 is attached at the other end to a second pivot axis 10 on the clevis 14.
  • the pivot axis of the first fork part 6 is sprung by an elastomer spring device 9, preferably by a so-called. ROSTA element.
  • the two fork parts, i. the first and the second fork part are connected to a transmission lever 11 via the joints 12 and 13.
  • the clevis 14 merges at its upper end into a vertical axis 15. This serves a rotatable about a vertical axis arrangement on a chassis.
  • Fig. 3 shows an upper view of the inventive suspension.
  • the fork parts 5 and 6 are one-armed and arranged in each case between the wheels attached to them.
  • the line A-A indicates the position of the sectional drawing of FIG.
  • Fig. 4 is a rear view of the suspension 1.
  • the axis of rotation 3 of the wheels 2 is suspended at a right angle to the axis of rotation 3 horizontally arranged swing axle 16. This ensures that the ground contact of both twin wheels is maintained when the one is raised to overcome an unevenness.
  • the pair of wheels leads by means of the pendulum axis limited pendulum movements to the left or right, if by rolling over a small obstacle of the Twin wheels 2 is slightly raised.
  • the swing axle may also include a spring means, such as a ROSTA element.
  • the reference numerals designate corresponding parts as in FIGS. 1 and 2.
  • Fig. 5 is a front view of the inventive suspension 1. Here, the raised arrangement of the climbing wheels 4 is also visible. Incidentally, the reference numerals designate corresponding parts as in FIGS. 1 and 2.
  • Fig. 6 illustrates another perspective view of the suspension, which is shown in detail in Figs. 1-5. For clarity, only one of the twin wheels is shown. Again, reference numbers refer to corresponding parts as in the preceding illustrations.
  • FIG. 7a and 7b two sectional drawings of the suspension according to the invention are compared, which represent two positions for a better understanding of the operation, namely in Fig. 7a in the rest position and in Fig. 7b in a position in which the supporting wheel. 2 is pushed back by an obstacle, which leads to a lowering of the Steigrades.
  • This is accomplished by forcing the first yoke 6, which is sprung with the ROSTA® element 9, backward with respect to the clevis 14.
  • the ROSTA element is stretched as long as the pressure on the first fork part stops.
  • the Steigrad 4 comes to rest on the obstacle and relieves the supporting wheel 2, wherein the overcoming of the obstacle is facilitated and the first fork part moves back to the rest position.
  • Fig. 7a and 7b two sectional drawings of the suspension according to the invention are compared, which represent two positions for a better understanding of the operation, namely in Fig. 7a in the rest position and in Fig. 7b in a position in which the supporting
  • a stop 18 is visible, which is covered with a damping material such as rubber.
  • the second fork element with the pivot axis end touches the stop.
  • Fig. 7b a distance between the stop and the pivot axis end of the second fork element is visible.
  • the embodiment is advantageously constructed so that the pitch wheel 5 can make a ground contact with a maximum pivoting of the first fork part 6.
  • Fig. 8a and 8b are two sectional drawings of the suspension according to the invention of an alternative embodiment with a toothed gear facing each other.
  • a movement of the fork element 6 is transmitted to the fork element 7 with a toothed gear.
  • This consists of a toothing 19 on the first fork element 6, a gear 20 and a toothing 21 on the second fork element 7.
  • Fig. 8a shows the suspension at rest and Fig. 8b a position in which the supporting wheel 2 is pushed by an obstacle to the rear , which also leads here to a lowering of the Steigrades 5.
  • the simple gear train illustrated herein may be replaced by other specially designed gear types without departing from the spirit of the present invention. Incidentally, the arrangement corresponds to the previously described embodiment.
  • FIG. 9 shows a perspective view of a wheelchair equipped with wheel suspensions 1 according to the invention.
  • the ROSTA element mentioned in the embodiment described above is a product of Rosta AG, Hauptstrasse 58, CH-5502 Hunzenschwil, Switzerland. It is also a torsion spring, a pivot bearing and a vibration damper. According to the manufacturer, the ROSTA element is a spring with four prestressed special rubber bodies between an outer housing consisting of a square tube segment and a 45-degree offset square profile. Because of the high friction, no axial lock is required.

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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)
EP06111951A 2006-03-29 2006-03-29 Suspension pour des fauteuils roulants, ou pour des moyens similaires de transport Withdrawn EP1839637A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06111951A EP1839637A1 (fr) 2006-03-29 2006-03-29 Suspension pour des fauteuils roulants, ou pour des moyens similaires de transport

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06111951A EP1839637A1 (fr) 2006-03-29 2006-03-29 Suspension pour des fauteuils roulants, ou pour des moyens similaires de transport

Publications (1)

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EP1839637A1 true EP1839637A1 (fr) 2007-10-03

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EP06111951A Withdrawn EP1839637A1 (fr) 2006-03-29 2006-03-29 Suspension pour des fauteuils roulants, ou pour des moyens similaires de transport

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2946246A1 (fr) * 2009-06-08 2010-12-10 Ass Fr Contre Les Myopathies Fauteuil roulant.
DE102009039871A1 (de) 2009-09-03 2011-03-10 Pascal Bayer Rad mit Steighilfe
EP2394622A2 (fr) 2010-06-14 2011-12-14 Sunrise Medical GmbH & Co. KG Dispositif de suspension de roue et fauteuil roulant doté d'un tel dispositif
CN104477265A (zh) * 2014-11-21 2015-04-01 江苏天绘智能科技有限公司 一种轮式爬楼车辆
US10130532B2 (en) 2013-12-16 2018-11-20 Pride Mobility Products Corporation Elevated height wheelchair
US11191685B2 (en) 2016-02-27 2021-12-07 Pride Mobility Products Corporation Adjustable height wheelchair

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6752230B1 (en) * 2003-01-13 2004-06-22 Shao Shih Huang Supplementary wheel support for a motorized wheelchair
EP1523971A2 (fr) * 2003-10-13 2005-04-20 Invacare Deutschland GmbH Fauteuil roulant
WO2005051279A1 (fr) * 2003-11-25 2005-06-09 Universidad Politecnica De Valencia Chaise roulante electrique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6752230B1 (en) * 2003-01-13 2004-06-22 Shao Shih Huang Supplementary wheel support for a motorized wheelchair
EP1523971A2 (fr) * 2003-10-13 2005-04-20 Invacare Deutschland GmbH Fauteuil roulant
WO2005051279A1 (fr) * 2003-11-25 2005-06-09 Universidad Politecnica De Valencia Chaise roulante electrique

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2946246A1 (fr) * 2009-06-08 2010-12-10 Ass Fr Contre Les Myopathies Fauteuil roulant.
DE102009039871A1 (de) 2009-09-03 2011-03-10 Pascal Bayer Rad mit Steighilfe
EP2394622A2 (fr) 2010-06-14 2011-12-14 Sunrise Medical GmbH & Co. KG Dispositif de suspension de roue et fauteuil roulant doté d'un tel dispositif
DE102010017349A1 (de) 2010-06-14 2011-12-15 Sunrise Medical Gmbh & Co. Kg Höhenverstellbare Radaufhängungs-Vorrichtung und Rollstuhl mit solch einer Vorrichtung
DE102010017349B4 (de) * 2010-06-14 2012-05-16 Sunrise Medical Gmbh & Co. Kg Höhenverstellbare Radaufhängungs-Vorrichtung und Rollstuhl mit solch einer Vorrichtung
EP2394622A3 (fr) * 2010-06-14 2012-12-19 Sunrise Medical GmbH & Co. KG Dispositif de suspension de roue et fauteuil roulant doté d'un tel dispositif
US10561548B1 (en) 2013-12-16 2020-02-18 Pride Mobility Products Corporation Elevated height wheelchair
US10130532B2 (en) 2013-12-16 2018-11-20 Pride Mobility Products Corporation Elevated height wheelchair
US10588797B2 (en) 2013-12-16 2020-03-17 Pride Mobility Products Corporation Elevated height wheelchair
US10687997B2 (en) 2013-12-16 2020-06-23 Pride Mobility Products Corporation Elevated height wheelchair
US10828212B2 (en) 2013-12-16 2020-11-10 Pride Mobility Products Corporation Elevated height wheelchair
US11141330B2 (en) 2013-12-16 2021-10-12 Pride Mobility Products Corporation Elevated height wheelchair
US11571345B2 (en) 2013-12-16 2023-02-07 Pride Mobility Products Corporation Elevated height wheelchair
US11998495B2 (en) 2013-12-16 2024-06-04 P{ride Mobility Products Corporation Elevated height wheelchair
CN104477265A (zh) * 2014-11-21 2015-04-01 江苏天绘智能科技有限公司 一种轮式爬楼车辆
US11191685B2 (en) 2016-02-27 2021-12-07 Pride Mobility Products Corporation Adjustable height wheelchair

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