EP3348248A1 - Fauteuil roulant - Google Patents

Fauteuil roulant Download PDF

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Publication number
EP3348248A1
EP3348248A1 EP18151408.4A EP18151408A EP3348248A1 EP 3348248 A1 EP3348248 A1 EP 3348248A1 EP 18151408 A EP18151408 A EP 18151408A EP 3348248 A1 EP3348248 A1 EP 3348248A1
Authority
EP
European Patent Office
Prior art keywords
support wheel
arm
wheelchair
wheel
frame
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.)
Granted
Application number
EP18151408.4A
Other languages
German (de)
English (en)
Other versions
EP3348248B1 (fr
Inventor
Mattheus Caspar Maria Meulendijks
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.)
Dietz Power Bv
Original Assignee
Rulsego BV
Rulsego BV
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Filing date
Publication date
Application filed by Rulsego BV, Rulsego BV filed Critical Rulsego BV
Publication of EP3348248A1 publication Critical patent/EP3348248A1/fr
Application granted granted Critical
Publication of EP3348248B1 publication Critical patent/EP3348248B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A61G5/10—Parts, details or accessories
    • A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame
    • 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
    • A61G5/043—Mid 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 wheelchair comprising a frame with a seat and a rolling chassis, wherein the chassis comprises a wheel suspension assembly on opposite sides of the frame, each with a bearing arm for a driven wheel and a support wheel arm for a support wheel, wherein the bearing arm is connected to the frame for pivoting about a first pivot axis lying substantially transversely of a longitudinal direction and the support wheel arm is pivotable about a second pivot axis relative to the frame, and wherein the bearing arm and the support wheel arm are provided with spring and/or damper means for thereby suspending and/or damping a pivoting movement of the bearing arm.
  • the invention relates particularly here to a mid-wheel drive wheelchair.
  • a mid-wheel drive wheelchair of the type described in the preamble is known from European patent application EP 2.716.268 .
  • the wheelchair described therein comprises a rolling chassis having a set of driven wheels centrally which extend from a suspension assembly on respectively the right and left-hand side of the seat. Both driven wheels are mounted here on a bearing arm which is connected pivotally about a first pivot axis to the frame on a front side. On a rear side of each bearing arm a support wheel arm is connected pivotally about a second pivot axis to the bearing arm. Extending herefrom on a rear side of the seat is a rear support wheel which is suspended by spring and/or damper means. These spring and/or damper means also provide for a suspension of the frame with the seat thereon.
  • the known wheelchair moreover has a set of independently pivoting and suspended front support wheels on a front side of the seat. These are each provided individually with separate spring and/or damper means mounted between the respective support wheel arm and the frame.
  • the present invention has for its object, among others, to provide a wheelchair which provides a more reliable weight distribution over the driven wheels.
  • a wheelchair of the type referred to in the preamble has the feature according to the invention that the support wheel arm is coupled via a bridge to the corresponding support wheel arm of the opposite wheel suspension assembly, that the bridge between the two support wheel arms is connected to the frame for pivoting about a pivot axis lying substantially along the longitudinal direction and that the support wheel arm is coupled via the spring and/or damper means to the bearing arm.
  • the bridge here particularly comprises a rigid body or a substantially rigid assembly of substantially rigid bodies.
  • connection of the bridge to the frame provides a pressure point which is thus directly transferred by the bridge suspended pivotally relative thereto to both support wheel arms connected thereto.
  • These two support wheel arms in turn distribute the load at least to a great extent equally over the two bearing arms with the driven wheels thereon. Both wheels thus always maintain at least substantially the same grip on the ground surface.
  • the spring and/or damper means between the bearing arm and the support wheel arm on each of the two sides of the chassis serve primarily for a suspension and comfort of the frame with the seat thereon, but moreover urge the support wheel arms with the support wheels thereon downward in order to maintain an effective contact with the ground surface.
  • the construction according to the invention is in principle already suitable for a wheelchair with a single set of support wheels, it is preferred to equip the wheelchair with support wheels at both the front and the rear.
  • a preferred embodiment of the wheelchair according to the invention has for this purpose the feature that the wheel suspension assembly comprises a front support wheel arm, from which a front support wheel extends, as well as a rear support wheel arm from which a rear support wheel extends, and that at least the rear support wheel arm is coupled via the bridge to the rear support wheel arm of the opposite wheel suspension assembly.
  • the front support wheels are located at a front side of the wheelchair, while the rear support wheels are mounted on a rear side as seen from the position of the user seated on the wheelchair and in a normal direction of travel.
  • Use can be made here of optionally independently pivoting support wheel arms at the front and/or at the rear.
  • the wheelchair according to the invention is however characterized in that the front support wheel arm of each of the wheel suspension assemblies is connected rigidly to the bearing arm, and in particular is formed integrally therewith, and that the front support wheel arm and the bearing arm extend on either side of the first pivot axis.
  • Such a rigid connection between the front support wheel arm and the bearing arm not only provides for simplicity of construction, but also for strength and travel stability. This latter is particularly important in the case of strong acceleration and deceleration of the wheelchair.
  • a further preferred embodiment of the wheelchair according to the invention has the feature that the front support wheel arm is otherwise freely pivotable about the first pivot axis relative to the frame.
  • the front support wheel arm is thus completely free to pivot about the first pivot axis together with the bearing arm and thereby maintain a good contact between the front support wheel and a ground surface in order to be able to thus accommodate to unevenness in the ground surface.
  • no further spring and/or damper means are provided here between the front support wheel arm and the frame as in the known wheelchair, as this would otherwise impede such a free pivoting of the front support wheel arm relative to the frame.
  • a preferred embodiment of the wheelchair according to the invention has the feature that the support wheel arm is connected to the bridge for pivoting about a pivot axis lying substantially along the bridge.
  • the support wheels here retain complete freedom to follow a ground surface irrespective of a position of the bridge about its own pivot axis. This imparts stability to the wheelchair which is thus prevented from tipping over, wherein the bridge connection moreover imparts a uniform distribution of forces.
  • a further preferred embodiment of the wheelchair according to the invention has the feature that the support wheel comprises a swivel wheel which can swivel freely around a substantially vertically oriented swivel axis.
  • the driven wheels are normally responsible for steering with the wheelchair.
  • a particular embodiment of the wheelchair according to the invention has for this purpose the feature that the drive means comprise a separate motor for each driven wheel, and more particularly that the bearing arm bears the motor.
  • the spring and/or damper means can be of diverse nature per se.
  • An air suspension or screw suspension can thus be applied therefor, optionally in combination with damper means.
  • Particularly good results have however been obtained with a particular embodiment of the wheelchair which is characterized according to the invention in that the spring and/or damper means are formed by a rubber body.
  • this is preferably a block element of optionally natural rubber in optionally hollow form.
  • the spring and/or damper means can thus not only be of a simple and inexpensive design, they can also thus remain relatively compact, and thereby fit readily inside the space of a relatively compact construction of the wheel suspension assembly of the wheelchair according to the invention.
  • a further preferred embodiment of the wheelchair according to the invention has the feature that a rotation axis of the driven wheel is located under the seat. Because the axis of the driven wheels thus extends under the seat and steering normally takes place therewith, steering of the wheelchair thus takes place about a vertical axis at the position of the user. This makes a significant contribution toward a natural feel and the ergonomics of the seat.
  • a further preferred embodiment according to the invention has the feature that the drive means comprise an electric motor powered by at least one rechargeable battery, wherein the frame comprises the at least one battery.
  • the at least one rechargeable battery is thus situated in or on the frame and the at least one battery contributes toward the total suspended mass of the seat. This will usually be a relatively heavy battery pack which will thus contribute to considerable extent toward a travel comfort of the seat.
  • the wheelchair of figure 1 comprises a frame 10 having thereon a seat 15 on which a user can sit.
  • the wheelchair is mobile due to a rolling chassis on which frame 10 supports in suspended manner.
  • the chassis comprises here an identical wheel suspension assembly A1,A2 on both sides of the frame which will be described in further detail hereinbelow.
  • the shown wheelchair is a mid-wheel drive wheelchair with a set of driven wheels 20 on respectively the left and right-hand side of the seat between a set of front support wheels 30 and a set of rear support wheels 40.
  • both driven wheels 20 have a separate electric motor, which is not further shown but which is assumed sufficiently known to a skilled person.
  • Power supply to the electric motors is provided by a rechargeable battery pack, which is likewise not further shown but assumed sufficiently known to a person with ordinary skill in the art, and which is accommodated under seat 15 in frame 10 and thereby contributes toward the total suspended mass of the seat.
  • a control Located within reach or otherwise manipulable from seat 15 is a control (not further shown) with which the drive of wheels 20 forward and/or rearward can be activated and with which it is possible for the user to steer.
  • the wheel suspension assemblies A1,A2 each comprise a bearing arm 25 connected at a proximal end for pivoting about a first pivot axis S1 to frame 10. At a distance from pivot axis S1 the bearing arm 25 bears a driven wheel 20 which is rotatable about a horizontal wheel axis W.
  • the electric motor is also usually mounted on or at this bearing arm 20 together with a transmission which provides for autonomous driving of the respective wheel 20.
  • Suspension assembly A1,A2 comprises on a rear side of the seat a rear support wheel arm 45 from which a rear support wheel 40 extends.
  • the rear support wheels are embodied here as swivel wheels which can swivel freely about an individual swivel axis Z.
  • the rear support wheel arm 45 comprises at a distal end an axle bushing 47 with bearing for receiving therein a shaft of a wheel fork 43 of the respective swivel wheel 40.
  • the support wheel arms 45 of both wheel suspension assemblies A1,A2 are mutually connected by means of a bridge 50.
  • Bridge 50 is connected in a hinge S to frame 10 for pivoting about a longitudinal axis L lying in a direction of travel.
  • the two support wheel arms 45 are in turn connected to bridge 50 for pivoting about a second pivot axis S2 directed along bridge 50, and are thereby free to pivot about a substantially vertical plane relative to bridge 50, and thereby relative to the frame.
  • the support wheel arm 45 is suspended from bearing arm 25 via spring and/or damper means D.
  • Spring means D here comprise a rubber body, but can optionally also comprise a screw spring or air spring, optionally in combination with a damper.
  • Spring means D are mounted between bearing arm 25 and rear support wheel arm 45, which are in turn free to pivot around respectively the first pivot axis S1 and the second pivot axis S2 relative to frame 10.
  • Rubber body D here not only provides for a suspension and comfort of the frame, but moreover transmits a pressure from bearing arm 25 to rear support wheel arm 45. This imparts a downward pressure to the respective rear support wheel arm 45 for a good contact of the rear support wheel 40 mounted thereon with the ground surface.
  • Bridge 50 can be formed in one part and for this purpose be shaped or cast in a desired form, or be assembled from parts welded or otherwise rigidly connected to each other. In both cases the bridge provides a rigid connection between rear support wheel arms 45 on the right and left-hand side, whereby they are mutually coupled.
  • the pivoting suspension S3 at the outer end nevertheless provides for independent support on the ground surface, whereby an optimal ground contact is enhanced irrespective of a possible unevenness of the ground surface.
  • Suspension assembly A1,A2 comprises on a front side of the seat a front support wheel arm 35 from which a front support wheel 30 extends.
  • Front support wheel 30 are likewise embodied as swivel wheels and can swivel freely about an individual swivel axis Z.
  • the respective front support wheel arm 35 comprises at a distal end an axle bushing 37 with bearing for receiving therein a shaft of a wheel fork 33 of the respective front support wheel 30.
  • Each of the front support wheel arms 35 is rigidly connected to bearing arm 25 of the respective wheel suspension assembly A1,A2 and connected together therewith to frame 10 for pivoting about the first pivot axis S1.
  • the front support wheel arms 35 are not coupled to frame 10, and particularly not connected thereto via further spring and/or damper means, and are thus unimpeded in their swivelling relative to the frame.
  • the invention thus provides an exceptionally stable and durable chassis for a driven wheelchair, in particular a mid-wheel drive wheelchair as shown.
  • a driven wheelchair in particular a mid-wheel drive wheelchair as shown.
  • the invention has been further elucidated here on the basis of only a single exemplary embodiment, it will be apparent that the invention is by no means limited thereto. On the contrary, many variations and embodiments are still possible within the scope of the invention for a person with ordinary skill in the art.
  • Use is thus made in the described example of steel parts for the different structural parts, in particular the bearing arms and wheel arms, although a lightweight metal such as aluminium, titanium or magnesium, or a carbon fibre-reinforced composite material can also be used instead while still retaining strength.
  • the seat can optionally also be embodied with a single set of support wheels on the rear side or front side, and use can optionally be made on the front and/or rear side of a single support wheel arm on which a single or double support wheel is mounted.
  • the wheelchair can if desired be further equipped with diverse comfort-increasing modifications of the frame, such as for instance armrests, an optionally electrical adjustment of the seat and/or a seat massage device.

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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)
EP18151408.4A 2017-01-13 2018-01-12 Fauteuil roulant Active EP3348248B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2018169A NL2018169B1 (nl) 2017-01-13 2017-01-13 Rolstoel

Publications (2)

Publication Number Publication Date
EP3348248A1 true EP3348248A1 (fr) 2018-07-18
EP3348248B1 EP3348248B1 (fr) 2019-07-24

Family

ID=60972076

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18151408.4A Active EP3348248B1 (fr) 2017-01-13 2018-01-12 Fauteuil roulant

Country Status (2)

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EP (1) EP3348248B1 (fr)
NL (1) NL2018169B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180214325A1 (en) * 2017-01-31 2018-08-02 Permobil Ab Swing arm assembly for a mid-wheel drive wheelchair
CN113086050A (zh) * 2021-04-30 2021-07-09 深圳市普渡科技有限公司 悬架装置、具有该悬架装置的底盘、机器人
CN113086051A (zh) * 2021-04-30 2021-07-09 深圳市普渡科技有限公司 悬架装置、具有该悬架装置的底盘、机器人

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994015567A1 (fr) * 1993-01-13 1994-07-21 Ligtvoet Products B.V. Fauteuil roulant
EP1078622A2 (fr) * 1999-08-02 2001-02-28 Tripuck B.V. Chassis pour véhicule et fauteuil roulant pourvu d'un tel chassis
AU2009100221A4 (en) * 2008-03-14 2009-04-23 Ac Mobility Pty Ltd A cantilevered arm suspension system for use with mid wheel drive power wheelchairs
US20100213683A1 (en) * 2009-02-25 2010-08-26 Karma Medical Products Co., Ltd. Chassis structure for mid-wheel drive power wheelchair
EP2716268A2 (fr) 2012-10-04 2014-04-09 You-Q B.V. Système de suspension pour chaise roulante motorisée à roue centrale

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994015567A1 (fr) * 1993-01-13 1994-07-21 Ligtvoet Products B.V. Fauteuil roulant
EP1078622A2 (fr) * 1999-08-02 2001-02-28 Tripuck B.V. Chassis pour véhicule et fauteuil roulant pourvu d'un tel chassis
AU2009100221A4 (en) * 2008-03-14 2009-04-23 Ac Mobility Pty Ltd A cantilevered arm suspension system for use with mid wheel drive power wheelchairs
US20100213683A1 (en) * 2009-02-25 2010-08-26 Karma Medical Products Co., Ltd. Chassis structure for mid-wheel drive power wheelchair
EP2716268A2 (fr) 2012-10-04 2014-04-09 You-Q B.V. Système de suspension pour chaise roulante motorisée à roue centrale

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180214325A1 (en) * 2017-01-31 2018-08-02 Permobil Ab Swing arm assembly for a mid-wheel drive wheelchair
US10667970B2 (en) * 2017-01-31 2020-06-02 Permobil Ab Swing arm assembly for a mid-wheel drive wheelchair
CN113086050A (zh) * 2021-04-30 2021-07-09 深圳市普渡科技有限公司 悬架装置、具有该悬架装置的底盘、机器人
CN113086051A (zh) * 2021-04-30 2021-07-09 深圳市普渡科技有限公司 悬架装置、具有该悬架装置的底盘、机器人

Also Published As

Publication number Publication date
EP3348248B1 (fr) 2019-07-24
NL2018169B1 (nl) 2018-07-25

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