EP3773400A1 - Wheelchair - Google Patents

Wheelchair

Info

Publication number
EP3773400A1
EP3773400A1 EP19719575.3A EP19719575A EP3773400A1 EP 3773400 A1 EP3773400 A1 EP 3773400A1 EP 19719575 A EP19719575 A EP 19719575A EP 3773400 A1 EP3773400 A1 EP 3773400A1
Authority
EP
European Patent Office
Prior art keywords
lateral axis
hub
handrail
wheel
relative
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
EP19719575.3A
Other languages
German (de)
French (fr)
Other versions
EP3773400B1 (en
EP3773400C0 (en
Inventor
Colin GALLOIS
Lancelot DURAND
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.)
Eppur
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3773400A1 publication Critical patent/EP3773400A1/en
Application granted granted Critical
Publication of EP3773400B1 publication Critical patent/EP3773400B1/en
Publication of EP3773400C0 publication Critical patent/EP3773400C0/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • A61G5/028—Special adaptations or provisions on hand rim, e.g. for facilitating gripping
    • 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
    • A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1008—Wheelchairs having brakes for gradually slowing down the wheelchair
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1021—Wheelchairs having brakes engaging specific brake elements
    • A61G5/1027—Hub elements, e.g. drums
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1035—Wheelchairs having brakes manipulated by wheelchair user
    • 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
    • A61G5/1083—Quickly-removable wheels

Definitions

  • the present invention relates to the field of non-motorized wheelchairs for the elderly or disabled.
  • the chairs generally comprise two lateral drive wheels driven by a handrail allowing the user to rotate the wheels, possibly at different speeds to direct the chair, and also to brake the chair.
  • a "car for the disabled” meant, in 1929 (date of filing of this patent), a tricycle with a single driving wheel at the rear, driven in the manner of a bicycle wheel.
  • a "car for the disabled” is not comparable to a wheelchair.
  • Japanese patent JPH06 165799 describing a wheelchair which stops positively in a position where it is oriented in a direction of progression without braking it halfway, allowing the wheelchair to have a function of backstop designed in a simple way and can be switched slightly.
  • a switch handle is turned counterclockwise when a wheelchair is rolled outside or is about to climb an uphill slope.
  • a one-way clutch with a bearing is firmly engaged, while a wheel hub tends to turn clockwise. Rotation occurs, that is, the wheel hub can turn counterclockwise, but can not turn clockwise, preventing the wheelchair from moving backward.
  • a cylindrical claw rides along the claw of a cylindrical bolt to allow engagement between the claw ridges.
  • a pin engages a hole in the wheel hub, so that the wheel hub is completely separated of a hub shaft and that the wheel hub can rotate freely again.
  • This patent describes a solution requiring an actuating lever and does not provide braking, driving in the forward direction and driving in reverse by an action on the same body, namely the handrail of each of drive wheels.
  • Patent US5027930 discloses a coaster brake coupled directly to a drive shaft.
  • a threaded shaft is integrated in the drive shaft.
  • a clutch cone having an internal thread moves in the axial directions as it threads into or out of the conductor, depending on the rotation of the conductor.
  • a brake cone is provided and has a smooth axial bore through which the drive shaft rotates. The axial movement of the clutch cone towards the brake cone has the effect of forcing the brake shoes against the inner wall of the hub.
  • a spring is provided to facilitate the action of the thread between the clutch cone and the driver.
  • This patent relates to a bicycle having a single driving wheel, without any handrail for driving it.
  • the invention relates, in its most general sense, to a wheelchair comprising a frame and two main drive wheels (in the human drive direction) each coupled to a handrail for one actuation of said wheels in both directions of rotation and for braking,
  • the right wheel being provided with a hub connected to the said handrail by a blocking connecting means in the clockwise direction
  • said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the anti-clockwise movement of said handrail relative to said lateral axis;
  • said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the hourly displacement of said handrail relative to the lateral axis.
  • the "clockwise” or “anti-clockwise” sense means when you look at the wheel from outside the chair.
  • the braking means is in particular provided by contacting two complementary surfaces in relative motion, for example the conical surface of a moving element axially with a complementary conical surface inside the hub.
  • said connecting means of the lateral axes with the frame are constituted by freewheels with rollers.
  • said connecting means of the lateral axes with the frame are constituted by freewheels ratchet.
  • connection zone of the frame is located between said connecting means of a lateral axis on the one hand, and the wheel and the handrail on the other hand.
  • said connecting means of the lateral axis with the frame comprises means for fast attachment of said lateral axis.
  • the invention also relates to a kit comprising a wheelchair wheel pair consisting of an assembly for the right side of the wheelchair relative to the normal direction of travel formed by
  • the right wheel being provided with a hub connected to the said handrail by a blocking connecting means in the clockwise direction
  • said hub including means for braking the rotation of said hub relative to said lateral axis, actuated by the counterclockwise movement of said handrail relative to said lateral axis
  • said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the hourly displacement of said handrail relative to said lateral axis.
  • the two wheels of the kit are of different natures, as regards the locking direction of the hub.
  • FIG. 1 represents an exploded view of a chair according to the invention
  • FIG. 2 shows an axial sectional view of the wheel according to a first embodiment wherein the flange containing a freewheel roller is positioned between the main shaft and the frame
  • FIG. 3 shows an axial sectional view of the wheel according to a second embodiment wherein a flange containing a freewheel roller is positioned inside the chair
  • FIG. 4 represents an axial sectional view of the wheel according to a third embodiment corresponding to a more compact embodiment of the first variant;
  • - Figure 5 shows an axial sectional view of the wheel according to a fourth embodiment wherein the flange containing a freewheel with rollers is housed in the hub of the wheel
  • FIG. 6 and 7 show an axial sectional view of the wheel according to said fourth embodiment, with a quick coupling system, respectively in the released position and in the engaged position
  • FIG. 8 shows an axial sectional view of the front and the wheel with a variant of said quick coupling system.
  • the chair is generally constituted by a frame (1) supporting a seat (2) and a backrest (3).
  • the chair has a right wheel (10) and a left wheel (20), relative to the direction of normal movement of the chair.
  • Each wheel (10, 20) can be actuated by a handrail respectively (11, 21).
  • the coupling between the left wheel (20) and the left handrail (21) associated is provided by a left hub (22) whose operation will be described below. It is the same for the coupling of the right wheel (10) with the right handrail (12), provided by a right hub.
  • a shaft (23) passes through the hub (22) of the wheel (20) associated with the handrail (21) and the flange (25) integral with the frame (24).
  • the inner end of the shaft (23) is held by a flange (25) containing a roller free wheel integral with said flange (25).
  • FIG. 2 represents a detailed view of the wheel according to a first variant embodiment in which the flange containing a freewheel roller is positioned between the wheel and the frame of the chair.
  • the flange (15) containing a free wheel (16) with rollers (17)) is fixed on the frame (14) by means of a rod axially extending the surface opposite the hub.
  • This rod is screwed to the frame of the chair. It can also be fixed by a quick hitch system.
  • a rapid attachment system is for example constituted by a rod extending the outer face of the flange and through the frame of the chair.
  • the rod may be retained by a spring-actuated latch or any other known means.
  • This flange (15) contains a free wheel (16) with rollers (17) allowing the rotation of the shaft (13).
  • the flange (25) contains a roller free wheel allowing the rotation of the shaft (23), integral with the wheel, in the clockwise direction (anti-trigonometric direction), but blocking the rotation in the direction counterclockwise for the right wheel.
  • the free wheel (16) for this purpose, in a known manner, inclined ramps.
  • the rollers (17) engage between the inclined ramps and the cylindrical inner surface of the flange (15), aided by a return spring acting on a roller cage.
  • the friction between rollers (17) and the freewheel (16) with inclined ramps on the one hand, between rollers (17) and the flange (15) on the other hand, as well as the geometry of the parts, creates the arc -boutement realizing a braking by adhesion.
  • the shaft (13) rotates counter-clockwise relative to the flange, the rollers disengage and allow free rotation with respect to the flange (15), for the right wheel, and clockwise for the left wheel.
  • the handrail (11) drives the wheel (40) provided with a thread (43).
  • the inner end of the wheel (40) has a thread (43) driving a movable assembly (44) having a ramp (45).
  • a moving element (44) When the moving element (44) is displaced axially outwards, its convex conical outer end (41) comes into contact with the concave bearing surface (42) of the hub (12) integral with the wheel (10) and thus ensures a coupling between the handrail (11) and the wheel (10).
  • the moving element (44) When the moving element (44) is moved axially inwards, it compresses a braking ring (46) whose opposite end rests on a cone (47) and whose outer face radially exert progressive friction on the hub (12) of the wheel (10).
  • the characteristics of the hub in particular the translational travel of the moving equipment between the two ends, the length of the moving equipment, and the pitch of the threading are determined so that the movement from one end to the other is obtained by a relative angular travel between the handrail and the associated wheel of about 1 °, and preferably between 0.1 ° and 10 °, and more preferably between 0.1 ° and 2 °.
  • a return spring pushes in the absence of stress on the handrail by the user, the latter in its forward position.
  • This spring is for example arranged in the hub to push the moving element outwardly, in the opposite direction of the frame.
  • the moving element (44) is pushed back to rest in a position where the convex conical outer end (41) comes into contact with the concave bearing surface (42) of the hub (12), under the action of a spring for example.
  • Figure 3 shows a detailed view of the wheel according to a second embodiment wherein the flange containing a freewheel roller is positioned inside the chair.
  • the wheel comprises a flange (15) coaxial with the hub (12).
  • the flange (15) is fixed on the inner surface of the frame (14) of the chair, by welding or by bolts or rivets.
  • This flange (15) contains a free wheel (16) with rollers (17) allowing rotation of the shaft (13), integral with the freewheel (16), counterclockwise (counterclockwise), but blocking clockwise rotation for the right wheel.
  • the flange (25) contains a roller free wheel allowing the rotation of the shaft (23), integral with the wheel, in the clockwise direction (anti-trigonometric direction), but blocking the rotation in the direction counterclockwise for the right wheel.
  • the free wheel (16) for this purpose, in a known manner, inclined ramps.
  • the rollers (17) engage between the inclined ramps and the cylindrical inner surface of the flange (15), aided by a return spring acting on a roller cage.
  • the friction between rollers (17) and the freewheel (16) with inclined ramps on the one hand, between rollers (17) and the flange (15) on the other hand, as well as the geometry of the parts, creates the arc -boutement realizing a braking by adhesion.
  • the shaft (13) rotates counter-clockwise relative to the flange, the rollers disengage and allow free rotation with respect to the flange (15), for the right wheel, and clockwise for the left wheel.
  • the handrail (11) drives the shaft (40) provided with a thread (43).
  • the inner end of the wheel (40) has a thread (43) driving a movable assembly (44) having a ramp (45).
  • the moving element (44) When the moving element (44) is moved axially inwards, it compresses a braking ring (46) whose opposite end rests on a cone (47) and whose radially outer face has progressive friction on the hub (12) of the wheel (10).
  • FIG. 4 represents a third variant embodiment.
  • the wheel differs from the first embodiment in that the flange (15) is attached to the outer ring of a free wheel (16) roller (17).
  • the inner ring of the freewheel ball is fixed to the lateral axis (13).
  • Figure 5 shows another variant of the system having the advantage of a better compactness.
  • the compactness guarantees among other things to the user the passage of the doors.
  • the kinematics of the system is identical to the variants described above.
  • the difference of this variant lies in the fact that said connecting means (15) of the lateral axes with the frame are located in a recess inside the plug (47) closing the hub.
  • connection of the lateral axis (13) to the frame is always made through a connecting means blocking in the clockwise direction and free to rotate in the counterclockwise direction.
  • the outer ring of the free wheel (16) with rollers (17) is fixed to an inner face of the plug (47) itself integral with the lateral axis (13).
  • the inner ring of said freewheel ball is fixed to the frame, through a second lateral axis (15) Adaptation of an existing chair
  • the invention also relates to a pair of wheels associated with the aforementioned mechanisms, to allow the transformation of an existing wheelchair.
  • a particular variant illustrated in Figures 6 and 7 relates to the attachment of the wheels on the frame of the chair by a quick coupling system respectively when the wheel is separated from the chair and when the wheel is fixed on the chair.
  • Such a system consists of a rod formed of two coaxial and contiguous sections (100 and 120), the front end of the section (100) coming into contact with the rear end of the section (120), the two sections ( 100, 120) being free in relative rotation.
  • the rod formed in the example described by the two sections (100, 120) is traversed by a needle (110) coaxial.
  • This rod may alternatively be made in a single section through the entire means of the wheel.
  • the first section (100) passes through the means and the hollow axis (13).
  • the second section (120) crosses the axis of the freewheel (16) with rollers.
  • the wall of the front end of the section (120) has slots for the passage of balls (104) radially movable between a position where they form a protuberance with respect to the outer surface of the section (120), thus increasing the cross-section , and a centripetal position where they fade.
  • the section of the front portion of the section (120) allows the engagement in a housing of the frame of the complementary section chair to the section of the section (120), when the balls are in the centripetal position, and when the balls are driven outwards, it ensures the locking of the section (120) in the frame of the armchair.
  • a needle (110) passes through the two sections (100, 120) and has at its front end an annular groove extended at the front by a frustoconical end portion for pushing the balls when the needle (110) is engaged. in the inner channel of the rod (100, 120).
  • the annular groove has a radius of curvature complementary to the radius of the balls (104). When this groove is pushed back to the level of the balls, they can move centripetally. At rest, a spring (102) pushes the needle (110) back, and the annular groove moves so that the balls are driven in the centrifugal position by the tubular section of the needle (110).
  • the quick hitch system is provided with an anti-rotation means, consisting of a tab (150) whose end is intended to be fixed on a fixed part of the wheelchair frame.
  • the end of this lug (150) has a light for engaging a lug (151) extending the surface of the chair frame.
  • this anti-rotation means is constituted by a flat section complementary to that of the front end of the section (120).

Abstract

The present invention concerns a wheelchair comprising a frame (1) and two main wheels (10, 20) each coupled to a handrim (11, 21) for actuating said wheels in both directions of rotation and for braking.

Description

FAUTEUIL ROULANT  WHEELCHAIR
Domaine de 1 ' invention Field of the invention
La présente invention concerne le domaine des fauteuils roulants non motorisés pour personnes âgées ou personnes handicapées.  The present invention relates to the field of non-motorized wheelchairs for the elderly or disabled.
Ces fauteuils doivent être légers, très robustes et permettre un déplacement manuel facile.  These chairs must be light, very robust and allow easy manual movement.
A cet effet, les fauteuils comportent généralement deux roues latérales motrices entraînées par une main courante permettant à l'utilisateur de faire tourner les roues, éventuellement à des vitesses différenciées pour diriger le fauteuil, et également de freiner le fauteuil.  For this purpose, the chairs generally comprise two lateral drive wheels driven by a handrail allowing the user to rotate the wheels, possibly at different speeds to direct the chair, and also to brake the chair.
Etat de la technique State of the art
On connaît dans l'état de la technique le brevet français FR685706 concernant un moyeu de frein à roue libre et à pédale arrière pour tricycles, voitures pour invalides, etc., adapté pour permettre à la roue de conduire en sens inverse, en utilisant un mécanisme à cliquet interposé entre le cycle, etc. une fourche et un élément portant la bande de frein, etc., et adaptés pour empêcher la rotation de cet élément dans le sens avant, mais pour permettre sa rotation dans le sens arrière, avec un frottement suffisant pour permettre le fonctionnement du frein. Le plateau à chaîne d'entraînement est monté sur un manchon comportant un filetage de vis s'engageant dans un élément qui entraîne le moyeu dans la direction avant (flèche F) par l'intermédiaire d'un mécanisme à cliquet et à cliquet permettant une action de roue libre. Lors du pédalage arrière (flèche B), l'organe est traversé par le filetage pour engager sa partie conique d'embrayage dans une cuvette qui, ensuite, fait basculer un levier autour de son pivot sur un plateau, élargir une bande au contact d'un tambour de frein. Ce document concerne principalement une roue pour cycle de type à rétropédalage avec une roue (unique) pour un cycle avec une fourche pour une seule roue arrière. Known in the state of the art the French patent FR685706 on a brake hub freewheel and rear pedal for tricycles, cars for invalids, etc., adapted to allow the wheel to drive in the opposite direction, using a ratchet mechanism interposed between the cycle, etc. a fork and an element carrying the brake band, etc., and adapted to prevent the rotation of this element in the forward direction, but to allow its rotation in the backward direction, with a sufficient friction to allow the operation of the brake. The drive chain tray is mounted on a sleeve having a screw thread engaging in a member which drives the hub in the forward direction (arrow F) via a ratchet and ratchet mechanism allowing freewheel action. During rear pedaling (arrow B), the body is traversed by the thread to engage its conical clutch portion in a bowl which, then, tilts a lever around its pivot on a plate, expand a strip in contact with a brake drum. This document mainly relates to a wheel for a back pedal type cycle with a wheel (single) for a cycle with a fork for a single rear wheel.
Une « voiture pour mutilés » désignait, en 1929 (date de dépôt de ce brevet), un tricycle avec une seule roue motrice à l'arrière, entraînée à la manière d'une roue de bicyclette.  A "car for the disabled" meant, in 1929 (date of filing of this patent), a tricycle with a single driving wheel at the rear, driven in the manner of a bicycle wheel.
Ce document n'évoque jamais 1 ' actionnement de la roue par une main courante (on ne voit pas trop où elle serait fixée sur une « voiture de mutilés »), ni l'utilisation de deux roues (si elles n'étaient pas jumelées mais disposées de part et d'autre d'un engin, celui-ci ne pourrait pas avancer), et encore moins l'utilisation de deux roues de structures différentes.  This document never evokes the actuation of the wheel by a handrail (it is not clear where it would be fixed on a "car of mutilated"), nor the use of two wheels (if they were not twinned but arranged on either side of a machine, it could not advance), let alone the use of two wheels of different structures.
Une « voiture pour mutilés » n'est pas assimilable à un fauteuil roulant.  A "car for the disabled" is not comparable to a wheelchair.
On connaît aussi le brevet japonais JPH06 165799 décrivant un fauteuil roulant qui s'arrête de manière positive dans une position où il est orienté dans une direction de progression sans le freiner à mi-pente, en permettant au fauteuil roulant d'avoir une fonction de butée arrière conçue de manière simple et pouvant être commutée légèrement. Une poignée de commutation est tournée dans le sens antihoraire lorsqu'un fauteuil roulant est roulé à l'extérieur ou est sur le point de gravir une pente ascendante. Lorsque le fauteuil roulant est situé dans une pente et que son utilisateur garde sa main loin de la manette, un embrayage unidirectionnel avec roulement est fermement engagé, tandis qu'un moyeu de roue tend à tourner dans le sens des aiguilles d'une montre. La rotation se produit c'est- à-dire que le moyeu de roue peut tourner dans le sens antihoraire, mais ne peut pas tourner dans le sens horaire, empêchant le fauteuil roulant de reculer. Si la poignée de commutation est tournée dans le sens des aiguilles d'une montre, une griffe cylindrique monte le long de la griffe d'un boulon cylindrique pour permettre un engagement entre les crêtes des griffes. En outre, une goupille s'engage dans un trou du moyeu de roue, de sorte que le moyeu de roue est complètement séparé d ' un arbre de moyeu et que le moyeu de roue peut à nouveau tourner librement. Also known is Japanese patent JPH06 165799 describing a wheelchair which stops positively in a position where it is oriented in a direction of progression without braking it halfway, allowing the wheelchair to have a function of backstop designed in a simple way and can be switched slightly. A switch handle is turned counterclockwise when a wheelchair is rolled outside or is about to climb an uphill slope. When the wheelchair is on a slope and its user keeps their hand away from the joystick, a one-way clutch with a bearing is firmly engaged, while a wheel hub tends to turn clockwise. Rotation occurs, that is, the wheel hub can turn counterclockwise, but can not turn clockwise, preventing the wheelchair from moving backward. If the switch handle is turned clockwise, a cylindrical claw rides along the claw of a cylindrical bolt to allow engagement between the claw ridges. In addition, a pin engages a hole in the wheel hub, so that the wheel hub is completely separated of a hub shaft and that the wheel hub can rotate freely again.
Ce brevet décrit une solution nécessitant une manette d'actionnement et ne permet pas d'assurer le freinage, l'entrainement en marche avant et l'entraînement en marche arrière par une action sur le même organe, à savoir la main courante de chacune des roues motrices.  This patent describes a solution requiring an actuating lever and does not provide braking, driving in the forward direction and driving in reverse by an action on the same body, namely the handrail of each of drive wheels.
Le brevet US5027930 décrit un frein à rétropédalage couplé directement à un arbre d'entraînement. Un arbre fileté est intégré à l'arbre d'entraînement. Un cône d'embrayage ayant un filetage interne se déplace dans les directions axiales lorsqu'il s'enfile dans ou hors du conducteur, en fonction de la rotation du conducteur. Un cône de frein est prévu et comporte un alésage axial lisse à travers lequel tourne l'arbre d'entraînement. Le mouvement axial du cône d'embrayage vers le cône de frein a pour effet de forcer les segments de frein contre la paroi interne du moyeu. Un ressort est prévu pour faciliter l'action du filetage entre le cône d'embrayage et le conducteur.  Patent US5027930 discloses a coaster brake coupled directly to a drive shaft. A threaded shaft is integrated in the drive shaft. A clutch cone having an internal thread moves in the axial directions as it threads into or out of the conductor, depending on the rotation of the conductor. A brake cone is provided and has a smooth axial bore through which the drive shaft rotates. The axial movement of the clutch cone towards the brake cone has the effect of forcing the brake shoes against the inner wall of the hub. A spring is provided to facilitate the action of the thread between the clutch cone and the driver.
Ce brevet concerne une bicyclette comportant une seule roue motrice, sans aucune main courante pour l'entraînant.  This patent relates to a bicycle having a single driving wheel, without any handrail for driving it.
Inconvénient de l'art antérieur Disadvantage of the prior art
Les solutions de l'art antérieur les plus proches de l'invention concernent les fauteuils roulants non motorisés à entraînement par mains courantes sur lesquelles l'utilisateur exerce des poussées répétées. Pour freiner, l'utilisateur bloque la main courante avec la paume de sa main. Lorsque le couple de freinage est important, il est usuel que l'utilisateur procède par des petites saccades pour ne pas provoquer de brulure de la paume de la main. The solutions of the prior art closest to the invention relate to non-motorized wheelchairs powered by handrails on which the user exerts repeated pushes. To brake, the user blocks the handrail with the palm of his hand. When the braking torque is important, it is customary for the user to proceed with small jerks so as not to burn the palm of the hand.
Solution apportée par l'invention Solution provided by the invention
Afin de remédier à cet inconvénient, l'invention concerne selon son acception la plus générale un fauteuil roulant comportant un cadre et deux roues principales motrices (au sens d'entrainement humain) accouplées chacune à une main courante pour 1 ' actionnement desdites roues dans les deux sens de rotation et pour le freinage, In order to remedy this drawback, the invention relates, in its most general sense, to a wheelchair comprising a frame and two main drive wheels (in the human drive direction) each coupled to a handrail for one actuation of said wheels in both directions of rotation and for braking,
caractérisé en ce que ledit cadre est équipé : characterized in that said frame is equipped with:
• du coté droit par rapport à la direction de déplacement normale  • on the right side compared to the direction of normal movement
o d'un moyen de liaison d'un axe latéral bloquant dans le sens horaire et libre en rotation dans le sens anti-horaire o la main courante droite étant montée libre en rotation par rapport audit axe latéral, sans liberté de translation axiale  o a connecting means of a lateral axis blocking in the clockwise direction and free in rotation in the anti-clockwise direction o the right handrail being mounted free to rotate relative to said lateral axis, without freedom of axial translation
o la roue droite étant munie d'un moyeu relié à ladite main courante par un moyen de liaison bloquant dans le sens horaire  the right wheel being provided with a hub connected to the said handrail by a blocking connecting means in the clockwise direction
o ledit moyeu comportant un moyen de freinage de la rotation dudit moyeu par rapport audit axe latéral, actionné par le déplacement anti-horaire de ladite main courante par rapport audit axe latéral  o said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the anti-clockwise movement of said handrail relative to said lateral axis;
• du coté gauche par rapport à la direction de déplacement normale  • on the left side compared to the direction of normal movement
o d'un moyen de liaison d'un axe latéral bloquant dans le sens anti-horaire et libre en rotation dans le sens horaire o la main courante gauche étant montée libre en rotation par rapport audit axe latéral, sans liberté de translation axiale  o a means of connection of a lateral axis blocking in the anti-clockwise direction and free in rotation in the clockwise direction o the left handrail being mounted free to rotate relative to said lateral axis, without freedom of axial translation
o la roue gauche étant munie d'un moyeu relié à ladite main courant par un moyen de liaison bloquant dans le sens antihoraire  o the left wheel being provided with a hub connected to said hand running by a blocking connecting means in the counterclockwise direction
o ledit moyeu comportant un moyen de freinage de la rotation dudit moyeu par rapport audit axe latéral, actionné par le déplacement horaire de ladite main courante par rapport axe latéral.  o said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the hourly displacement of said handrail relative to the lateral axis.
Le sens « horaire » ou « anti-horaire » s'entend lorsqu'on regarde la roue depuis l'extérieur du fauteuil. Le moyen de freinage est notamment assuré par la mise en contact de deux surfaces complémentaires en mouvement relatif, par exemple la surface conique d'un équipage mobile axialement avec une surface conique complémentaire à l'intérieur du moyeu. The "clockwise" or "anti-clockwise" sense means when you look at the wheel from outside the chair. The braking means is in particular provided by contacting two complementary surfaces in relative motion, for example the conical surface of a moving element axially with a complementary conical surface inside the hub.
Selon une variante, lesdits moyens de liaison des axes latéraux avec le cadre sont constitués par des roues libres à rouleaux. According to a variant, said connecting means of the lateral axes with the frame are constituted by freewheels with rollers.
Selon une autre variante, lesdits moyens de liaison des axes latéraux avec le cadre sont constitués par des roues libres à cliquet. According to another variant, said connecting means of the lateral axes with the frame are constituted by freewheels ratchet.
Selon une autre variante éventuelle, la zone de liaison du cadre est située entre ledit moyen de liaison d'un axe latéral d'une part, et la roue et la main courante d'autre part . According to another possible variant, the connection zone of the frame is located between said connecting means of a lateral axis on the one hand, and the wheel and the handrail on the other hand.
Selon un mode de réalisation particulier, ledit moyen de liaison de l'axe latéral avec le cadre comporte un moyen d'attache rapide dudit axe latéral. According to a particular embodiment, said connecting means of the lateral axis with the frame comprises means for fast attachment of said lateral axis.
L'invention concerne aussi un kit comprenant un couple de roues pour fauteuil roulant constitué par un ensemble destiné au côté droit du fauteuil par rapport à la direction de déplacement normale, formé par The invention also relates to a kit comprising a wheelchair wheel pair consisting of an assembly for the right side of the wheelchair relative to the normal direction of travel formed by
o une main courante droite montée libre en rotation par rapport à un axe latéral, sans liberté de translation axiale  o a straight handrail mounted free to rotate with respect to a lateral axis, without freedom of axial translation
o la roue droite étant munie d'un moyeu relié à ladite main courante par un moyen de liaison bloquant dans le sens horaire  the right wheel being provided with a hub connected to the said handrail by a blocking connecting means in the clockwise direction
o ledit moyeu comportant un moyen de freinage de la rotation dudit moyeu par rapport audit axe latéral, actionné par le déplacement anti-horaire de ladite main courante par rapport audit axe latéral said hub including means for braking the rotation of said hub relative to said lateral axis, actuated by the counterclockwise movement of said handrail relative to said lateral axis
et par un ensemble destiné au côté gauche du fauteuil par rapport à la direction de déplacement normale, formé par and by an assembly for the left side of the chair with respect to the normal direction of movement formed by
o la main courante gauche montée libre en rotation par rapport audit axe latéral, sans liberté de translation axiale  o the left handrail mounted free to rotate relative to said lateral axis, without freedom of axial translation
o la roue gauche étant munie d'un moyeu relié à ladite main courante par un moyen de liaison bloquant dans le sens anti-horaire  o the left wheel being provided with a hub connected to said handrail by means of blocking connection in the counterclockwise direction
o ledit moyeu comportant un moyen de freinage de la rotation dudit moyeu par rapport audit axe latéral, actionné par le déplacement horaire de ladite main courante par rapport audit axe latéral.  o said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the hourly displacement of said handrail relative to said lateral axis.
Les deux roues du kit sont de natures différentes, en ce qui concerne le sens de blocage du moyeu.  The two wheels of the kit are of different natures, as regards the locking direction of the hub.
Description détaillée d'un exemple non limitatif de l'invention Detailed description of a non-limiting example of the invention
La présente invention sera mieux comprise à la lecture de la description détaillée d'un exemple non limitatif de l'invention qui suit, se référant aux dessins annexés où : The present invention will be better understood on reading the detailed description of a nonlimiting example of the invention which follows, with reference to the appended drawings in which:
la figure 1 représente une vue éclatée d'un fauteuil selon l'invention  FIG. 1 represents an exploded view of a chair according to the invention
- la figure 2 représente une vue en coupe axiale de la roue selon un premier mode de réalisation où la flasque contenant une roue libre à rouleaux est positionnée entre l'arbre principal et le cadre  - Figure 2 shows an axial sectional view of the wheel according to a first embodiment wherein the flange containing a freewheel roller is positioned between the main shaft and the frame
- la figure 3 représente une vue en coupe axiale de la roue selon un deuxième mode de réalisation où une flasque contenant une roue libre à rouleaux est positionnée à l'intérieur du fauteuil  - Figure 3 shows an axial sectional view of the wheel according to a second embodiment wherein a flange containing a freewheel roller is positioned inside the chair
- la figure 4 représente une vue en coupe axiale de la roue selon un troisième mode de réalisation correspondant à une réalisation plus compacte de la première variante - la figure 5 représente une vue en coupe axiale de la roue selon un quatrième mode de réalisation où la flasque contenant une roue libre à rouleaux est logée dans le moyeu de la roue FIG. 4 represents an axial sectional view of the wheel according to a third embodiment corresponding to a more compact embodiment of the first variant; - Figure 5 shows an axial sectional view of the wheel according to a fourth embodiment wherein the flange containing a freewheel with rollers is housed in the hub of the wheel
- les figures 6 et 7 représentent une vue en coupe axiale de la roue selon ledit quatrième mode de réalisation, avec un système d'attache rapide, respectivement en position dégagée et en position engagée  - Figures 6 and 7 show an axial sectional view of the wheel according to said fourth embodiment, with a quick coupling system, respectively in the released position and in the engaged position
- la figure 8 représente une vue en coupe axiale de et de face de la roue avec une variante dudit système d'attache rapide .  - Figure 8 shows an axial sectional view of the front and the wheel with a variant of said quick coupling system.
Présentation générale du fauteuil General presentation of the armchair
Le fauteuil est constitué de façon générale par un cadre (1) supportant une assise (2) et un dossier (3). The chair is generally constituted by a frame (1) supporting a seat (2) and a backrest (3).
Le fauteuil comporte une roue droite (10) et une roue gauche (20), par rapport au sens de déplacement normal du fauteuil .  The chair has a right wheel (10) and a left wheel (20), relative to the direction of normal movement of the chair.
Chaque roue (10, 20) peut être actionnée par une main courante respectivement (11, 21). Le couplage entre la roue gauche (20) et la main courante gauche (21) associée est assuré par un moyeu gauche (22) dont le fonctionnement sera décrit dans la suite. Il en est de même pour l'accouplement de la roue droite (10) avec la main courante droite (12), assuré par un moyeu droit .  Each wheel (10, 20) can be actuated by a handrail respectively (11, 21). The coupling between the left wheel (20) and the left handrail (21) associated is provided by a left hub (22) whose operation will be described below. It is the same for the coupling of the right wheel (10) with the right handrail (12), provided by a right hub.
Un arbre (23) traverse le moyeu (22) de la roue (20) associée à la main courante (21), ainsi que la flasque (25) solidaire du bâti (24). L'extrémité intérieure de l'arbre (23) est maintenue par une flasque (25) contenant une roue libre à rouleau, solidaire de ladite flasque (25).  A shaft (23) passes through the hub (22) of the wheel (20) associated with the handrail (21) and the flange (25) integral with the frame (24). The inner end of the shaft (23) is held by a flange (25) containing a roller free wheel integral with said flange (25).
Description détaillée de la roue droite selon une première Detailed description of the right wheel according to a first
variante de réalisation  variant of embodiment
La figure 2 représente une vue en détail de la roue selon une première variante de réalisation où la flasque contenant une roue libre à rouleaux est positionnée entre la roue et le cadre du fauteuil. FIG. 2 represents a detailed view of the wheel according to a first variant embodiment in which the flange containing a freewheel roller is positioned between the wheel and the frame of the chair.
La flasque (15) contenant une roue libre (16) à rouleaux (17)) est fixée sur le cadre (14) par l'intermédiaire d'une tige prolongeant axialement la surface opposée au moyeu. Cette tige est vissée au cadre du fauteuil. Elle peut aussi être fixée par un système d'attache rapide. Un tel système d'attache rapide est par exemple constitué par une tige prolongeant la face extérieure de la flasque et traversant le cadre du fauteuil. La tige peut être retenue par un verrou actionné par un ressort ou tout autre moyen connu.  The flange (15) containing a free wheel (16) with rollers (17)) is fixed on the frame (14) by means of a rod axially extending the surface opposite the hub. This rod is screwed to the frame of the chair. It can also be fixed by a quick hitch system. Such a rapid attachment system is for example constituted by a rod extending the outer face of the flange and through the frame of the chair. The rod may be retained by a spring-actuated latch or any other known means.
Cette flasque (15) contient une roue libre (16) à rouleaux (17) autorisant la rotation de l'arbre (13).  This flange (15) contains a free wheel (16) with rollers (17) allowing the rotation of the shaft (13).
Pour la roue gauche, la flasque (25) contient une roue libre à rouleaux autorisant la rotation de l'arbre (23), solidaire de la roue, dans le sens horaire (sens anti- trigonométrique ) , mais bloquant la rotation dans le sens antihoraire pour la roue droite.  For the left wheel, the flange (25) contains a roller free wheel allowing the rotation of the shaft (23), integral with the wheel, in the clockwise direction (anti-trigonometric direction), but blocking the rotation in the direction counterclockwise for the right wheel.
La roue libre (16) présente à cet effet, de manière connue, des rampes inclinées. Les rouleaux (17) s'engagent entre les rampes inclinées et la surface intérieure cylindrique de la flasque (15), aidés par un ressort de rappel agissant sur une cage à rouleaux. Le frottement entre rouleaux (17) et la roue libre (16) à rampes inclinées d'une part, entre rouleaux (17) et la flasque (15) d'autre part, ainsi que la géométrie des pièces, crée de l'arc-boutement réalisant un freinage par adhérence. Lorsque l'arbre (13) tourne dans le sens anti-horaire par rapport à la flasque, les rouleaux se dégagent et permet une rotation libre par rapport à la flasque (15), pour la roue droite, et dans le sens horaire pour la roue gauche.  The free wheel (16) for this purpose, in a known manner, inclined ramps. The rollers (17) engage between the inclined ramps and the cylindrical inner surface of the flange (15), aided by a return spring acting on a roller cage. The friction between rollers (17) and the freewheel (16) with inclined ramps on the one hand, between rollers (17) and the flange (15) on the other hand, as well as the geometry of the parts, creates the arc -boutement realizing a braking by adhesion. When the shaft (13) rotates counter-clockwise relative to the flange, the rollers disengage and allow free rotation with respect to the flange (15), for the right wheel, and clockwise for the left wheel.
La main courante (11) entraîne la roue (40) munie d'un filetage (43).  The handrail (11) drives the wheel (40) provided with a thread (43).
L'extrémité intérieure de la roue (40) présente un filetage (43) entraînant un équipage mobile (44) présentant une rampe ( 45 ) . Lorsque l'équipage mobile (44) est déplacé axialement vers l'extérieur, son extrémité extérieure conique convexe (41) vient en contact avec la surface d'appui concave (42) du moyeu (12) solidaire de la roue (10) et assure ainsi un accouplement entre la main courante (11) et la roue (10). The inner end of the wheel (40) has a thread (43) driving a movable assembly (44) having a ramp (45). When the moving element (44) is displaced axially outwards, its convex conical outer end (41) comes into contact with the concave bearing surface (42) of the hub (12) integral with the wheel (10) and thus ensures a coupling between the handrail (11) and the wheel (10).
Lorsque l'équipage mobile (44) est déplacé axialement vers l'intérieur, il assure la compression d'une bague de freinage (46), dont l'extrémité opposée s'appuie sur un cône (47) et dont la face extérieure vient exercer radialement un frottement progressif sur le moyeu (12) de la roue (10).  When the moving element (44) is moved axially inwards, it compresses a braking ring (46) whose opposite end rests on a cone (47) and whose outer face radially exert progressive friction on the hub (12) of the wheel (10).
Les caractéristiques du moyeu, notamment la course en translation de l'équipage mobile entre les deux extrémités, la longueur de l'équipage mobile, et le pas du filetage sont déterminés de façon à ce que le déplacement d'une extrémité à l'autre soit obtenu par une course angulaire relative entre la main courante et la roue associée d'environ 1°, et préférentiellement entre 0,1° et 10°, et plus préférentiellement entre 0.1° et 2°.  The characteristics of the hub, in particular the translational travel of the moving equipment between the two ends, the length of the moving equipment, and the pitch of the threading are determined so that the movement from one end to the other is obtained by a relative angular travel between the handrail and the associated wheel of about 1 °, and preferably between 0.1 ° and 10 °, and more preferably between 0.1 ° and 2 °.
Selon une variante, un ressort de rappel repousse en l'absence de sollicitation de la main courante par l'utilisateur, cette dernière dans sa position de marche avant. Ce ressort est par exemple disposé dans le moyeu pour repousser l'équipage mobile vers l'extérieur, en direction opposée du châssis. Ainsi, l'équipage mobile (44) est repoussé au repos dans une position où l'extrémité extérieure conique convexe (41) vient en contact avec la surface d'appui concave (42) du moyeu (12), sous l'action d'un ressort par exemple.  Alternatively, a return spring pushes in the absence of stress on the handrail by the user, the latter in its forward position. This spring is for example arranged in the hub to push the moving element outwardly, in the opposite direction of the frame. Thus, the moving element (44) is pushed back to rest in a position where the convex conical outer end (41) comes into contact with the concave bearing surface (42) of the hub (12), under the action of a spring for example.
Description détaillée de la roue droite selon une deuxième variante de réalisation Detailed description of the right wheel according to a second variant embodiment
La figure 3 représente une vue en détail de la roue selon une deuxième variante de réalisation où la flasque contenant une roue libre à rouleaux est positionnée à l'intérieur du fauteuil. La roue comprend une flasque (15) coaxiale avec le moyeu ( 12 ) . Figure 3 shows a detailed view of the wheel according to a second embodiment wherein the flange containing a freewheel roller is positioned inside the chair. The wheel comprises a flange (15) coaxial with the hub (12).
La flasque (15) est fixée sur la surface intérieure du cadre (14) du fauteuil, par soudure ou par des boulons ou des rivets .  The flange (15) is fixed on the inner surface of the frame (14) of the chair, by welding or by bolts or rivets.
Cette flasque (15) contient une roue libre (16) à rouleaux (17) autorisant la rotation de l'arbre (13), solidaire de la roue libre (16), dans le sens anti-horaire (sens trigonométrique ) , mais bloquant la rotation dans le sens horaire pour la roue droite.  This flange (15) contains a free wheel (16) with rollers (17) allowing rotation of the shaft (13), integral with the freewheel (16), counterclockwise (counterclockwise), but blocking clockwise rotation for the right wheel.
Pour la roue gauche, la flasque (25) contient une roue libre à rouleaux autorisant la rotation de l'arbre (23), solidaire de la roue, dans le sens horaire (sens anti- trigonométrique ) , mais bloquant la rotation dans le sens antihoraire pour la roue droite.  For the left wheel, the flange (25) contains a roller free wheel allowing the rotation of the shaft (23), integral with the wheel, in the clockwise direction (anti-trigonometric direction), but blocking the rotation in the direction counterclockwise for the right wheel.
La roue libre (16) présente à cet effet, de manière connue, des rampes inclinées. Les rouleaux (17) s'engagent entre les rampes inclinées et la surface intérieure cylindrique de la flasque (15), aidés par un ressort de rappel agissant sur une cage à rouleaux. Le frottement entre rouleaux (17) et la roue libre (16) à rampes inclinées d'une part, entre rouleaux (17) et la flasque (15) d'autre part, ainsi que la géométrie des pièces, crée de l'arc-boutement réalisant un freinage par adhérence. Lorsque l'arbre (13) tourne dans le sens anti-horaire par rapport à la flasque, les rouleaux se dégagent et permettent une rotation libre par rapport à la flasque (15), pour la roue droite, et dans le sens horaire pour la roue gauche.  The free wheel (16) for this purpose, in a known manner, inclined ramps. The rollers (17) engage between the inclined ramps and the cylindrical inner surface of the flange (15), aided by a return spring acting on a roller cage. The friction between rollers (17) and the freewheel (16) with inclined ramps on the one hand, between rollers (17) and the flange (15) on the other hand, as well as the geometry of the parts, creates the arc -boutement realizing a braking by adhesion. When the shaft (13) rotates counter-clockwise relative to the flange, the rollers disengage and allow free rotation with respect to the flange (15), for the right wheel, and clockwise for the left wheel.
La main courante (11) entraîne l'arbre (40) munie d'un filetage (43).  The handrail (11) drives the shaft (40) provided with a thread (43).
L'extrémité intérieure de la roue (40) présente un filetage (43) entraînant un équipage mobile (44) présentant une rampe ( 45 ) .  The inner end of the wheel (40) has a thread (43) driving a movable assembly (44) having a ramp (45).
Lorsque l'équipage mobile (44) est déplacé vers l'extérieur, son extrémité extérieure conique convexe (41) vient en contact avec la surface d'appui concave (42) du moyeu (12) solidaire de la roue (10) et assure ainsi un accouplement entre la main courante (11) et la roue (10). When the movable assembly (44) is moved outwardly, its convex conical outer end (41) engages the concave bearing surface (42) of the hub (12) secured to the wheel (10) and thus ensures a coupling between the handrail (11) and the wheel (10).
Lorsque l'équipage mobile (44) est déplacé axialement vers l'intérieur, il assure la compression d'une bague de freinage (46), dont l'extrémité opposée s'appuie sur un cône (47) et dont la face extérieure radialement vient exercer un frottement progressif sur le moyeu (12) de la roue (10).  When the moving element (44) is moved axially inwards, it compresses a braking ring (46) whose opposite end rests on a cone (47) and whose radially outer face has progressive friction on the hub (12) of the wheel (10).
Description détaillée de la roue droite selon une troisième variante de réalisation Detailed description of the right wheel according to a third variant embodiment
La figure 4 représente une troisième variante de réalisation. La roue se distingue de la première variante de réalisation par le fait que la flasque (15) est fixée à la bague extérieure d'une roue libre (16) à rouleau (17). La bague intérieure de la roue libre à bille est fixée à l'axe latéral (13). FIG. 4 represents a third variant embodiment. The wheel differs from the first embodiment in that the flange (15) is attached to the outer ring of a free wheel (16) roller (17). The inner ring of the freewheel ball is fixed to the lateral axis (13).
Variante de réalisation de roues droite à moyeu intégré Variation of realization of wheels right with integrated hub
La figure 5 représente une autre variante du système ayant pour avantage une meilleure compacité. La compacité garantissant entre autres à l'utilisateur le passage des portes. Figure 5 shows another variant of the system having the advantage of a better compactness. The compactness guarantees among other things to the user the passage of the doors.
La cinématique du système est identique aux variantes décrites précédemment. La différence de cette variante réside dans le fait que lesdits moyens de liaison (15) des axes latéraux avec le cadre sont situés dans un renfoncement intérieur du bouchon (47) fermant le moyeu.  The kinematics of the system is identical to the variants described above. The difference of this variant lies in the fact that said connecting means (15) of the lateral axes with the frame are located in a recess inside the plug (47) closing the hub.
La liaison de l'axe latéral (13) au cadre est toujours réalisée au travers d'un moyen de liaison bloquant dans le sens horaire et libre en rotation dans le sens anti-horaire. La bague extérieure de la roue libre (16) à rouleaux (17) est fixée à une face intérieure du bouchon (47) lui-même solidaire de l'axe latéral (13). La bague intérieure de ladite roue libre à bille est fixée au cadre, au travers d'un second axe latéral (15) Adaptation d'un fauteuil existant The connection of the lateral axis (13) to the frame is always made through a connecting means blocking in the clockwise direction and free to rotate in the counterclockwise direction. The outer ring of the free wheel (16) with rollers (17) is fixed to an inner face of the plug (47) itself integral with the lateral axis (13). The inner ring of said freewheel ball is fixed to the frame, through a second lateral axis (15) Adaptation of an existing chair
L'invention porte également sur un couple de roues associées aux mécanismes susvisés, pour permettre la transformation d'un fauteuil roulant existant. The invention also relates to a pair of wheels associated with the aforementioned mechanisms, to allow the transformation of an existing wheelchair.
Fixation des roues par un système d'attache rapide Fixing the wheels by a quick coupling system
Une variante particulière illustrée par les figures 6 et 7 concerne la fixation des roues sur le cadre du fauteuil par un système d'attache rapide respectivement lorsque la roue est séparée du fauteuil et lorsque la roue est fixée sur le fauteuil . A particular variant illustrated in Figures 6 and 7 relates to the attachment of the wheels on the frame of the chair by a quick coupling system respectively when the wheel is separated from the chair and when the wheel is fixed on the chair.
Un tel système est constitué par une tige formée de deux tronçons (100 et 120) coaxiaux et contigus, l'extrémité frontale avant du tronçon (100) venant en contact avec l'extrémité frontale arrière du tronçon (120), les deux tronçons (100, 120) étant libres en rotation relative.  Such a system consists of a rod formed of two coaxial and contiguous sections (100 and 120), the front end of the section (100) coming into contact with the rear end of the section (120), the two sections ( 100, 120) being free in relative rotation.
La tige formée dans l'exemple décrit par les deux tronçons (100, 120) est traversée par une aiguille (110) coaxiale. Cette tige peut alternativement être réalisée en un seul tronçon traversant l'ensemble du moyen de la roue. The rod formed in the example described by the two sections (100, 120) is traversed by a needle (110) coaxial. This rod may alternatively be made in a single section through the entire means of the wheel.
Le premier tronçon (100) traverse le moyen et l'axe creux ( 13 ) . The first section (100) passes through the means and the hollow axis (13).
Le deuxième tronçon (120) traverse l'axe de la roue libre (16) à rouleaux.  The second section (120) crosses the axis of the freewheel (16) with rollers.
La paroi de l'extrémité avant du tronçon (120) présente des lumières pour le passage de billes (104) mobile radialement entre une position où elles forment une protubérance par rapport à la surface extérieure du tronçon (120), augmentant ainsi la section transversale, et une position centripète où elles s'effacent. En fonction de la position des billes, la section de la partie avant du tronçon (120) permet l'engagement dans un logement du châssis du fauteuil de section complémentaire à la section du tronçon (120), lorsque les billes sont en position centripète, et lorsque les billes sont chassées vers l'extérieur, elle assure le blocage du tronçon (120) dans le châssis du fauteuil. The wall of the front end of the section (120) has slots for the passage of balls (104) radially movable between a position where they form a protuberance with respect to the outer surface of the section (120), thus increasing the cross-section , and a centripetal position where they fade. Depending on the position of the balls, the section of the front portion of the section (120) allows the engagement in a housing of the frame of the complementary section chair to the section of the section (120), when the balls are in the centripetal position, and when the balls are driven outwards, it ensures the locking of the section (120) in the frame of the armchair.
Une aiguille (110) traverse les deux tronçons (100, 120) et présente à son extrémité avant une gorge annulaire prolongée à l'avant par une partie terminale tronconique permettant de repousser les billes lors de l'engagement de l'aiguille (110) dans le canal intérieur de la tige (100, 120). La gorge annulaire présente un rayon de courbure complémentaire du rayon des billes (104). Lorsque cette gorge est repoussée au niveau des billes, elles peuvent se déplacer en position centripète. Au repos, un ressort (102) repousse l'aiguille (110) vers l'arrière, et la gorge annulaire se déplace de sorte que les billes sont chassées en position centrifuge par la section tubulaire de l'aiguille (110).  A needle (110) passes through the two sections (100, 120) and has at its front end an annular groove extended at the front by a frustoconical end portion for pushing the balls when the needle (110) is engaged. in the inner channel of the rod (100, 120). The annular groove has a radius of curvature complementary to the radius of the balls (104). When this groove is pushed back to the level of the balls, they can move centripetally. At rest, a spring (102) pushes the needle (110) back, and the annular groove moves so that the balls are driven in the centrifugal position by the tubular section of the needle (110).
Le système d'attache rapide est muni d'un moyen antirotation, constitué par une patte (150) dont l'extrémité est destinée à être fixée sur une partie fixe du châssis du fauteuil roulant. L'extrémité de cette patte (150) présente une lumière pour l'engagement d'un ergot (151) prolongeant la surface du châssis du fauteuil.  The quick hitch system is provided with an anti-rotation means, consisting of a tab (150) whose end is intended to be fixed on a fixed part of the wheelchair frame. The end of this lug (150) has a light for engaging a lug (151) extending the surface of the chair frame.
Dans l'exemple illustré par la figure 8, ce moyen anti-rotation est constitué par un méplat de section complémentaire avec celle de l'extrémité avant du tronçon (120).  In the example illustrated in FIG. 8, this anti-rotation means is constituted by a flat section complementary to that of the front end of the section (120).

Claims

Revendications claims
1 - Fauteuil roulant comportant un cadre (1) et deux roues principales (10, 20) motrices accouplées chacune à une main courante (11, 21) pour 1 ' actionnement desdites roues dans les deux sens de rotation et pour le freinage, 1 - a wheelchair comprising a frame (1) and two main wheels (10, 20) motor each coupled to a handrail (11, 21) for one actuation of said wheels in both directions of rotation and for braking,
caractérisé en ce que ledit cadre (1) est équipé : characterized in that said frame (1) is equipped with:
• du coté droit par rapport à la direction de déplacement normale  • on the right side compared to the direction of normal movement
o d'un moyen de liaison (15) d'un axe latéral (13) bloquant dans le sens horaire et libre en rotation dans le sens anti-horaire  o a connecting means (15) of a lateral axis (13) blocking in the clockwise direction and free to rotate in the counterclockwise direction
o la main courante droite (11) étant montée libre en rotation par rapport audit axe latéral (13), sans liberté de translation axiale  o the right handrail (11) being rotatably mounted relative to said lateral axis (13), without freedom of axial translation
o la roue droite (10) étant munie d'un moyeu (12) relié à ladite main courante (11) par un moyen de liaison bloquant dans le sens horaire  the right wheel (10) being provided with a hub (12) connected to said handrail (11) by a locking means in the clockwise direction
o ledit moyeu comportant un moyen de freinage de la rotation dudit moyeu par rapport audit axe latéral, actionné par le déplacement anti-horaire de ladite main courante par rapport audit axe latéral  o said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the anti-clockwise movement of said handrail relative to said lateral axis;
• du coté gauche par rapport à la direction de déplacement normale  • on the left side compared to the direction of normal movement
o d'un moyen de liaison (25) d'un axe latéral (23) bloquant dans le sens anti-horaire et libre en rotation dans le sens horaire  o a connecting means (25) of a lateral axis (23) blocking in the anti-clockwise direction and free to rotate in a clockwise direction
o la main courante (21) gauche étant montée libre en rotation par rapport audit axe latéral (23), sans liberté de translation axiale  the left handrail (21) being mounted free to rotate with respect to said lateral axis (23), without freedom of axial translation
o la roue gauche (20) étant muni d'un moyeu (22) relié à ladite main courant par un moyen de liaison bloquant dans le sens anti-horaire  o the left wheel (20) being provided with a hub (22) connected to said hand running by a blocking connection means in the counterclockwise direction
o ledit moyeu (22) comportant un moyen de freinage de la rotation dudit moyeu par rapport audit axe latéral, actionné par le déplacement horaire de ladite main courante par rapport axe latéral. said hub (22) including means for braking the rotation of said hub with respect to said lateral axis, actuated by the hourly displacement of said handrail relative to the lateral axis.
2 - Fauteuil roulant selon la revendication 1 caractérisé en ce que lesdits moyens de liaison des axes latéraux avec le cadre sont constitués par des roues libres à rouleaux. 2 - wheelchair according to claim 1 characterized in that said connecting means of the lateral axes with the frame are constituted by freewheels with rollers.
3 - Fauteuil roulant selon la revendication 1 caractérisé en ce que lesdits moyens de liaison des axes latéraux avec le cadre sont constitués par des roues libres à cliquet. 3 - wheelchair according to claim 1 characterized in that said connection means of the lateral axes with the frame are constituted by freewheel ratchet.
4 - Fauteuil roulant selon la revendication 1 caractérisé en ce que la zone de liaison du cadre est située entre ledit moyen de liaison d'un axe latéral d'une part, et la roue et la main courante d'autre part. 4 - wheelchair according to claim 1 characterized in that the connection zone of the frame is located between said connecting means of a lateral axis on the one hand, and the wheel and the handrail on the other.
5 - Fauteuil roulant selon la revendication 1 caractérisé en ce que ledit moyen de liaison de l'axe latéral avec le cadre comporte un moyen d'attache rapide dudit axe latéral . 5 - wheelchair according to claim 1 characterized in that said connecting means of the lateral axis with the frame comprises a quick attachment means of said lateral axis.
6 — Couple de roues pour fauteuil roulant conforme à la revendication 1, constitué par un ensemble destiné au côté droit du fauteuil par rapport à la direction de déplacement normale, formé par 6 - A pair of wheelchair wheels according to claim 1, consisting of an assembly for the right side of the chair relative to the normal direction of movement, formed by
o une main courante droite étant montée libre en rotation par rapport audit axe latéral, sans liberté de translation axiale  a right handrail being mounted free to rotate relative to said lateral axis, without freedom of axial translation
o la roue droite étant munie d'un moyeu relié à ladite main courante par un moyen de liaison bloquant dans le sens horaire  the right wheel being provided with a hub connected to the said handrail by a blocking connecting means in the clockwise direction
o ledit moyeu comportant un moyen de freinage de la rotation dudit moyeu par rapport audit axe latéral, actionné par le déplacement anti-horaire de ladite main courante par rapport audit axe latéral et par un ensemble destiné au coté gauche du fauteuil par rapport à la direction de déplacement normale, formé par o said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the anti-clockwise movement of said handrail relative to said lateral axis; and by a set for the left side of the chair relative to the direction of normal movement, formed by
o la main courante gauche montée libre en rotation par rapport audit axe latéral, sans liberté de translation axiale  o the left handrail mounted free to rotate relative to said lateral axis, without freedom of axial translation
o la roue gauche étant munie d'un moyeu relié à ladite main courante par un moyen de liaison bloquant dans le sens anti-horaire  o the left wheel being provided with a hub connected to said handrail by means of blocking connection in the counterclockwise direction
o ledit moyeu comportant un moyen de freinage de la rotation dudit moyeu par rapport audit axe latéral, actionné par le déplacement horaire de ladite main courante par rapport audit axe latéral.  o said hub having means for braking the rotation of said hub relative to said lateral axis, actuated by the hourly displacement of said handrail relative to said lateral axis.
7 — Couple de roues pour fauteuil roulant conforme à la revendication précédente caractérisé en ce que chaque roue comporte un système d'attache rapide. 7 - Wheelchair wheel pair according to the preceding claim characterized in that each wheel comprises a quick attachment system.
8 — Couple de roues pour fauteuil roulant conforme à la revendication précédente caractérisé en ce que ledit système d'attache rapide est constitué par une tige formée de deux tronçons (100 et 120) libres en rotation relative traversée par une aiguille (110) coaxiale, la paroi de l'extrémité avant du tronçon (120) présentant des lumières pour le passage de billes (104) mobile radialement entre une position où elles forment une protubérance par rapport à la surface extérieure du tronçon (120), augmentant ainsi la section transversale, et une position centripète où elles s'effacent, lesdites billes coopérant avec aiguille (110) une gorge annulaire prévue à l'avant de ladite aiguille ( 110 ) . 8 - A pair of wheelchair wheels according to the preceding claim characterized in that said quick coupling system is constituted by a rod formed of two sections (100 and 120) free in relative rotation traversed by a needle (110) coaxial, the wall of the forward end of the section (120) having slots for the passage of balls (104) radially movable between a position where they form a protuberance with respect to the outer surface of the section (120), thereby increasing the cross-section , and a centripetal position where they fade, said needle-engaging balls (110) an annular groove provided in front of said needle (110).
9 — Couple de roues pour fauteuil roulant conforme à la revendication précédente caractérisé en ce que ledit système d'attache rapide est muni d'un moyen anti-rotation, constitué par une patte (150) dont l'extrémité est destinée à être fixée sur une partie fixe du châssis du fauteuil roulant. 10 — Couple de roues pour fauteuil roulant conforme à la revendication 8 caractérisé en ce que ledit système d'attache rapide est muni d'un moyen anti-rotation, constitué par un méplat formé à l'extrémité avant du tronçon (120) de ladite tige. 9 - A pair of wheelchair wheels according to the preceding claim characterized in that said quick coupling system is provided with an anti-rotation means, consisting of a tab (150) whose end is intended to be fixed on a fixed part of the wheelchair frame. 10 - A pair of wheelchair wheels according to claim 8 characterized in that said quick coupling system is provided with an anti-rotation means, consisting of a flat formed at the front end of the section (120) of said rod.
EP19719575.3A 2018-04-03 2019-04-03 Wheelchair Active EP3773400B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1852876A FR3079412B1 (en) 2018-04-03 2018-04-03 WHEELCHAIR
PCT/FR2019/050766 WO2019193277A1 (en) 2018-04-03 2019-04-03 Wheelchair

Publications (3)

Publication Number Publication Date
EP3773400A1 true EP3773400A1 (en) 2021-02-17
EP3773400B1 EP3773400B1 (en) 2023-09-13
EP3773400C0 EP3773400C0 (en) 2023-09-13

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EP19719575.3A Active EP3773400B1 (en) 2018-04-03 2019-04-03 Wheelchair

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US (1) US11730644B2 (en)
EP (1) EP3773400B1 (en)
FR (1) FR3079412B1 (en)
PL (1) PL3773400T3 (en)
WO (1) WO2019193277A1 (en)

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Also Published As

Publication number Publication date
US20210169715A1 (en) 2021-06-10
FR3079412A1 (en) 2019-10-04
EP3773400B1 (en) 2023-09-13
PL3773400T3 (en) 2024-02-12
EP3773400C0 (en) 2023-09-13
FR3079412B1 (en) 2022-02-11
US11730644B2 (en) 2023-08-22
WO2019193277A1 (en) 2019-10-10

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