EP3770098B1 - Monte-escalier et procédé de fonctionnement d'un monte-escalier - Google Patents

Monte-escalier et procédé de fonctionnement d'un monte-escalier Download PDF

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Publication number
EP3770098B1
EP3770098B1 EP20173474.6A EP20173474A EP3770098B1 EP 3770098 B1 EP3770098 B1 EP 3770098B1 EP 20173474 A EP20173474 A EP 20173474A EP 3770098 B1 EP3770098 B1 EP 3770098B1
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EP
European Patent Office
Prior art keywords
driving gear
gear element
platform
motor
stairlift
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.)
Active
Application number
EP20173474.6A
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German (de)
English (en)
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EP3770098A1 (fr
Inventor
Holger Kuster
Bahtiyar Uysal
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.)
Framo Morat & Co KG GmbH
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Framo Morat & Co KG GmbH
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Publication of EP3770098A1 publication Critical patent/EP3770098A1/fr
Application granted granted Critical
Publication of EP3770098B1 publication Critical patent/EP3770098B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/06—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces
    • B66B9/08—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces associated with stairways, e.g. for transporting disabled persons
    • B66B9/0838—Levelling gears
    • 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
    • A61G5/104—Devices for lifting or tilting the whole wheelchair

Definitions

  • the invention is based on a stair lift with a support and guide rail, a carriage guided thereon and a platform pivotably arranged on the carriage, the inclination of which relative to the carriage is adjusted via a platform drive in such a way that the platform is aligned horizontally.
  • Stair lifts are also known as stair lifts or inclined stair lifts. They are used to transport a person or a load up or down stairs.
  • a platform arranged on a carriage is moved along a support and guide rail, which is arranged on the stairs, for example on a wall next to the stairs or on the steps.
  • the carriage is equipped with a carriage drive that moves the carriage along the support and guide rail.
  • the platform can accommodate a person sitting, standing or in a wheelchair.
  • the platform is adapted to the respective requirements. If a person is to be transported sitting, the platform is designed as a seat. If a person is to be transported standing or in a wheelchair, the platform is equipped with handles or special facilities for the wheelchair as a standing area.
  • a platform drive ensures that the platform is horizontal and its horizontal orientation maintained during transport even if the gradient of the support and guide rail changes due to the course of the stairs.
  • the staircase can have a curve or a landing and thus sections with different gradients.
  • the WO 2014/098575 A1 discloses a stair lift drive with a rail, with a first frame part and a second frame part, each of which is equipped with a pair of wheels engaging in the rail, with a mounting part fixedly connected to the first frame part and rotatably connected to the second frame part for mounting a carrier for a load , for example a seat.
  • the mounting part is freely rotatable about two axes that are perpendicular to each other and perpendicular to the tangential direction of the rail.
  • a scale arranged on the mounting part rests with a first section on a first leveling body and with a second section on a second leveling body.
  • the first leveling body is moved by a first leveling motor assigned to it.
  • the second leveling body is moved by a second leveling motor assigned to it. If the scale is deflected from its starting position, the assembly part deviates from the specified alignment. In this case, at least one of the two leveling motors is driven and the associated leveling body is lowered or raised until the scale is back in its starting position.
  • the disadvantage of the stair lift is that the gears assigned to the two leveling motors and leveling bodies are susceptible to wear and, in the event of wear and tear on the gears, the horizontal alignment of a platform arranged on the mounting part cannot be maintained.
  • the invention is based on the object of providing a stair lift and a method for operating a stair lift which guarantee a low susceptibility to wear of the stair lift and which ensure the horizontal alignment of the platform even in the event of damage.
  • the platform drive which adjusts the inclination of the platform relative to the carriage in such a way that the platform is aligned essentially horizontally regardless of the course of the support and guide rail, comprises a driving gear element, at least two driving gear elements and at least two motors.
  • the driving gear element is connected to the platform in such a way that a rotational movement of the driving gear element leads to a rotational movement of the platform.
  • the at least two driving gear elements are constantly in engagement with the driving gear element.
  • Each motor is connected to a driving gear element.
  • the driving gear element is directly or indirectly coupled to a drive shaft of the motor assigned to it.
  • Additional gear stages can be provided between the motor and the driving gear element assigned to it.
  • Each of the motors transmits its drive torque to the driving one assigned to it Gear element. This transfers the drive torque to the driving gear element.
  • the drive torque can be increased or decreased according to a possible translation and the efficiency.
  • the platform drive for adjusting the inclination of the platform is therefore divided into several power branches.
  • Each power branch includes a motor and a driving gear element.
  • the power branches are brought together at the driving gear element.
  • the torque with which the driving gear element is driven therefore corresponds to the sum of the drive torques of the motors.
  • the total torque is not transmitted in a single engagement between a driving gear element and the driving gear element, but is distributed over several interventions.
  • the abrasion and thus the wear on an engagement depend on the load that acts on the engagement when transmitting a torque or a force. Distributing the load over several interventions means that the wear per intervention is reduced compared to a gearbox with only one intervention.
  • the stair lift according to the invention can therefore be operated for significantly longer without wear-related failures than a stair lift in which the inclination of the platform is adjusted via a platform drive with only one motor.
  • the division of the platform drive into several power branches also leads to a redundant drive system. If one power branch fails, at least one further power branch is available. This guarantees that a safe condition is maintained.
  • the failure of a power branch can be detected based on the at least one remaining, still functional power branch.
  • a control of the The platform drive can then ensure that the platform remains in a horizontal orientation and that the stair lift is stopped if necessary.
  • a failure of a power branch can be triggered, for example, by the failure of a motor or by gearbox damage.
  • the platform is designed as a seat.
  • One person can be transported in a sitting position.
  • the platform is designed as a standing platform for one person. It also has a handle for one person.
  • the standing platform can be combined with a seat, for example a folding seat, so that a person can be transported either sitting or standing.
  • the platform is equipped with a holder for a wheelchair.
  • the driving gear element is equipped with exactly one toothing for all driving gear elements, in which all driving gear elements comb.
  • the driving gear elements engage the driving gear element in a circumferentially offset or axially offset manner.
  • the driving gear element is equipped with several teeth.
  • Each toothing is assigned at least one of the driving gear elements, which meshes in the relevant toothing of the driving gear element.
  • the gearing can be of the same quality or different.
  • a first toothing of the driving gear element can be provided on the circumference and a second toothing on the flat surface.
  • the driving gear element can be made in one piece or in several parts.
  • each gear element part can be assigned a toothing.
  • the driving gear element can be an assembly of several gears with different or the same types of toothing.
  • the driving gear element is designed as a worm wheel. At least one of the driving gear elements is designed as a worm, which meshes in the worm wheel.
  • the worm wheel has a globoidal shape.
  • the globoidal shape of the worm wheel is determined by the contour of the teeth.
  • the teeth, which run essentially parallel to the axis of rotation of the worm wheel, are curved inwards in such a way that the distance between the outer contour of the teeth and the axis of rotation of the worm wheel is greater at the edges than in a central area between the edges.
  • the shape of the means that the driving gear element designed as a worm wheel at least partially surrounds a driving gear element designed as a worm.
  • At least one of the gear elements designed as a worm has a globoidal shape.
  • the outer diameter of the screw is different in the axial direction: in a central area, the outer diameter is smaller than at the two edge areas that delimit the central area.
  • This shape means that the worm at least partially surrounds the worm wheel. The worm is held in position by the worm wheel even if the axial lock of the worm fails.
  • the gear consisting of a driving gear element and driving gear elements is designed as a self-locking gear.
  • At least one of the motors is equipped with a brake.
  • the brake is an electromechanical brake.
  • the brake is a magnetic brake.
  • the platform drive is equipped with a sensor which detects the angle or the path that the drive shaft of a motor or the driving gear element coupled to it or the driving gear element travels. This corresponds to the distance that occurs when the drive shaft of the motor or the driving gear element coupled to it or the driving gear element rotates through an angle along the respective Circumferential side is covered. Since the path depends on the radius of the drive shaft or the respective gear element, the path is different if the angle is the same, depending on whether it is recorded for the drive shaft, the driving gear element or the driving gear element.
  • the method according to the invention with the features of claim 16 is characterized in that the wear of the gear elements is recorded based on the torsional play of the gear elements.
  • a first motor of the at least two motors is stopped.
  • a second motor of the at least two motors drives the driving gear element coupled to its drive shaft in a first direction of movement until it is blocked due to the stopped first motor and a first blockage thereby occurs.
  • the stopped first motor causes the first driving gear element coupled to it to rest. This applies accordingly to the driving gear element, which is in engagement with the first driving gear element.
  • a movement of the second driving gear element coupled to the second motor and the driven gear element is only possible to an extent that is given by a play between the gear elements.
  • the second motor then drives the driving gear element coupled to its drive shaft in the opposite second direction of movement until it is blocked again due to the stopped first motor and a second blockage occurs as a result.
  • the path or angle is recorded that the drive shaft of the second motor or the driving gear element coupled to it or the driving gear element travels from the first blockage to the second blockage.
  • the torsional backlash between the first driving gear element coupled to the first motor and the driving gear element is derived from this angle or path. The larger the angle or path, the greater the torsional backlash between the gear elements.
  • the backlash in relation to the second driving gear element coupled to the second motor and the driven gear element can be determined accordingly by the second motor is stopped and the first motor is driven in a first direction of movement up to a first blockage and then in a second direction of movement up to a second blockage.
  • the backlash between the second driving gear element and the driving gear element is derived from the angle or path that the drive shaft of the first motor or the driving gear element coupled to it or the driving gear element travels from the first blockage to the second blockage.
  • the torsional backlash with respect to one of the driving gear elements is determined by stopping the motor assigned to it and all other motors initially in a first direction of movement up to a first Blockade can be driven. All other motors are then driven in a second direction of movement until a second blockage occurs. The angle or path that the driving gear element or the drive shafts of the driven motors or the driving gear elements coupled to them have traveled between the two blockages is then determined.
  • the detected path or angle is compared with a predetermined limit value. If the limit value is exceeded, the stair lift is switched off. In this case, it is assumed that a reliable adjustment of the inclination of the platform can no longer be guaranteed due to the torsional play.
  • FIG. 1 A first exemplary embodiment of a stair lift is shown schematically.
  • the stair lift includes a support and guide rail 1 on which a carriage 2 is guided. Only a section of the support and guide rail is shown. The course of this section shows that the support and guide rail 1 has different inclinations.
  • the carriage 2 is driven by a carriage drive 3.
  • the carriage drive 3 ensures a relative movement of the carriage 2 relative to the support and guide rail 1.
  • a platform 4 is movably arranged on the carriage 2.
  • the carriage 2 is equipped with a platform drive 5, which adjusts the inclination of the platform 4 relative to the carriage 2 in such a way that the platform 4 is aligned essentially horizontally, regardless of the course of the support and guide rail 1.
  • the platform drive 5 comprises a driving gear element 6 designed as a worm wheel, two driving gear elements 7, 8 in engagement with this, which are designed as worms, and two motors 9, 10.
  • One of the two motors 9, 10 drives one the driving gear elements 7, 8.
  • a support element 11 is coupled to the driving gear element, to which the platform 4 is in turn attached.
  • FIG. 2 to 6 a platform drive 15 of a second exemplary embodiment of a stair lift is shown.
  • the platform drive 15 of the second The exemplary embodiment includes a driving gear element 16, a first driving gear element 17, a second driving gear element 18, a first motor 19, a second motor 20 and a drive housing 21.
  • the driving gear element 16 is designed as a worm wheel.
  • the two driving gear elements 17, 18 are designed as worms.
  • the detailed illustrations according to Figures 5 and 6 show that the two driving gear elements 17, 18 are in engagement with the driving gear element 16 and mesh with it.
  • the first motor 19 is coupled to the first driving gear element 17, which corresponds to the first worm, and transmits its torque to it.
  • the second motor 20 is coupled to the second driving gear element 18, which corresponds to the second worm, and transmits its torque to it.
  • the two driving gear elements 17, 18 engage the driving gear element 16 diametrically opposite each other.
  • the first power branch includes the first motor 19 and the first driving gear element 17.
  • the second power branch includes the second motor 20 and the second driving gear element 18.
  • the two motors 19, 20 have their drive axes perpendicular to the axes of rotation the two driving gear elements 17, 18 are aligned. The torques of the two motors 19, 20 are transmitted to the driving gear element 16 via the driving gear elements 17, 18.
  • the platform drive 15 is shown with the drive housing 21 closed.
  • the driving gear element 16 designed as a worm wheel can be seen in a top view.
  • the worm wheel is equipped with several holes 22 on its flat side. These serve to connect a platform to the driving gear element.
  • an in Figure 1 The support element 11 shown can be fastened to the driving gear element 16 by means of screws or other connecting elements inserted into the bores 22.
  • the Figures 4 to 6 show that the abortifacient Gear element 16 is equipped with spur teeth.
  • the gearing is as shown Figure 2 not visible.
  • the driving gear element 26 and the two driving gear elements 27, 28 of a platform drive are shown from a third exemplary embodiment of a stair lift.
  • the driving gear element 26 is designed as a worm wheel and the two driving gear elements are designed as worms.
  • the driving gear element 26 differs from the two driving gear elements 6 of the first and second exemplary embodiments in that it has a globoidal shape.
  • Two diametrically opposite teeth of the driving gear element 26 are shown in section.
  • the side of the teeth facing the driving gear elements 27, 28 has a curved shape, so that the teeth rest on the driving gear elements 27, 28 and the driving gear element 26 is secured against offset in its axial direction.

Claims (17)

  1. Monte-escalier
    avec un rail de support et de guidage (1),
    avec un chariot (2) guidé sur le rail de support et de guidage (1),
    avec une plateforme (4) disposée de manière orientable sur le chariot (2), avec une commande de plateforme (5, 15) qui règle l'inclinaison de la plateforme (4) par rapport au chariot (2) de telle manière que ladite plateforme (4) est essentiellement ajustée à l'horizontale,
    la commande de plateforme (5, 15) comprenant un élément d'engrenage mené (6, 16, 26) relié à la plateforme (4), au moins deux éléments d'engrenage menants (7, 8, 17, 18, 27, 28) et au moins deux moteurs (9, 10, 19, 20), un arbre d'entraînement de chaque moteur (9, 10, 19, 20) étant couplé avec respectivement un des éléments d'engrenage menants (7, 8, 17, 18, 27, 28) pour la transmission d'un couple de rotation, de telle façon que plusieurs branches de puissance sont prévues et que chaque branche de puissance comporte un moteur (9, 10, 19, 20) et un élément d'engrenage menant (7, 8, 17, 18, 27, 28),
    caractérisé en ce que
    les au moins deux éléments d'engrenage menants (7, 8, 17, 18, 27, 28) sont en prise avec l'élément d'engrenage mené (6, 16, 26) et que les branches de puissance sont réunies sur l'élément d'engrenage mené (6, 16, 26).
  2. Monte-escalier selon la revendication 1, caractérisé en ce que la plateforme (4) est réalisé sous la forme d'un siège.
  3. Monte-escalier selon la revendication 1, caractérisé en ce que la plateforme (4) est réalisée sous la forme d'une plateforme pour se tenir debout et en ce que ladite plateforme pour se tenir debout est dotée de poignées permettant à la personne de se tenir.
  4. Monte-escalier selon la revendication 1, caractérisé en ce que la plateforme (4) est réalisée pour recevoir un fauteuil roulant.
  5. Monte-escalier selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'engrenage mené (6, 16, 26) est réalisé sous la forme d'un pignon.
  6. Monte-escalier selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'engrenage mené (6, 16, 26) est doté de précisément une denture pour tous les éléments d'engrenage menants (7, 8, 17, 18, 27, 28), dans laquelle tous les éléments d'engrenage menants (7, 8, 17, 18, 27, 28) s'engrènent.
  7. Monte-escalier selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'élément d'engrenage mené est doté de plusieurs dentures, chaque denture étant associée à au moins un des éléments d'engrenage menants, lesdits éléments d'engrenage menants s'engrenant dans la denture associée de l'élément d'engrenage mené.
  8. Monte-escalier selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'engrenage mené (6, 16, 26) est réalisé sous la forme d'une roue hélicoïdale et qu'au moins un des éléments d'engrenage menants (7, 8, 17, 18, 27, 28) est réalisé sous la forme d'une vis sans fin qui s'engrène dans ladite roue hélicoïdale.
  9. Monte-escalier selon la revendication 8, caractérisé en ce que la roue hélicoïdale (26) présente une forme globique.
  10. Monte-escalier selon la revendication 8 ou 9, caractérisé en ce que au moins un des éléments d'engrenage réalisés sous la forme d'une vis sans fin présente une forme globique.
  11. Monte-escalier selon l'une quelconque des revendications précédentes, caractérisé en ce que l'engrenage constitué de l'élément d'engrenage mené (6, 16, 26) et des éléments d'engrenage menants (7, 8, 17, 18, 27, 28) est réalisé sous la forme d'un engrenage autobloquant.
  12. Monte-escalier selon l'une quelconque des revendications précédentes, caractérisé en ce que au moins un des moteurs (9, 10, 19, 20) est doté d'un frein.
  13. Monte-escalier selon la revendication 12, caractérisé en ce que le frein est un frein électromécanique.
  14. Monte-escalier selon la revendication 12, caractérisé en ce que le frein est un frein magnétique.
  15. Monte-escalier selon l'une quelconque des revendications précédentes, caractérisé en ce que la commande de plateforme (5) est dotée d'un capteur qui détecte l'angle parcouru ou la course parcourue par l'arbre d'entraînement d'un moteur (9, 10, 19, 20) ou par l'élément d'engrenage menant (7, 8, 17, 18, 27, 28) couplé avec ledit arbre ou par l'élément d'engrenage mené (6, 16, 26).
  16. Procédé de fonctionnement d'un monte-escalier selon l'une quelconque des revendications 1 à 15, caractérisé en ce que l'usure des éléments d'engrenage (6, 7, 8, 16, 17, 18, 26, 27, 28) est détectée au moyen du jeu primitif des éléments d'engrenage (6, 7, 8, 16, 17, 18, 26, 27, 28), pour cela, un premier moteur (9, 19) des au moins deux moteurs est arrêté et un deuxième moteur (10, 20) des au moins deux moteurs entraîne l'élément d'engrenage menant (8, 18, 28) couplé avec son arbre d'entraînement dans un premier sens de mouvement jusqu'à ce qu'il soit bloqué en raison du premier moteur (9, 19) arrêté et qu'un premier blocage survienne de ce fait, le deuxième moteur (10, 20) entraînant ensuite l'élément d'engrenage menant (8, 18, 28) couplé avec son arbre d'entraînement dans un deuxième sens de mouvement, opposé au premier sens de mouvement, jusqu'à ce qu'il soit bloqué en raison du premier moteur (9, 19) arrêté et qu'un deuxième blocage survienne de ce fait, la course parcourue ou l'angle parcouru par l'arbre d'entraînement du deuxième moteur (10, 20) ou par l'élément d'engrenage menant (8, 18, 28) couplé avec ledit arbre d'entrainement ou par l'élément d'engrenage mené (6, 16, 26) entre le premier blocage et le deuxième blocage étant ainsi détecté(e).
  17. Procédé selon la revendication 16, caractérisé en ce que la course détectée ou l'angle détecté sont comparés avec une valeur limite définie et que le monte-escalier est désactivé si ladite valeur définie est dépassée.
EP20173474.6A 2019-07-22 2020-05-07 Monte-escalier et procédé de fonctionnement d'un monte-escalier Active EP3770098B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019119770.8A DE102019119770A1 (de) 2019-07-22 2019-07-22 Treppenlift und Verfahren zum Betreiben eines Treppenlifts

Publications (2)

Publication Number Publication Date
EP3770098A1 EP3770098A1 (fr) 2021-01-27
EP3770098B1 true EP3770098B1 (fr) 2023-09-13

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DE (1) DE102019119770A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022002787A1 (de) 2022-08-01 2024-02-01 Abm Greiffenberger Antriebstechnik Gmbh Antrieb für einen beweglichen Gegenstand

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3478618B1 (fr) * 2016-06-30 2020-09-09 Platinum Stairlifts Ltd Unité d'entraînement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO954872L (no) * 1995-11-30 1997-06-02 Svein Erik Roeed Heisanordning
NL1007770C2 (nl) * 1997-12-11 1999-06-14 Thyssen De Reus Bv Lift.
GB9930491D0 (en) * 1999-12-23 2000-02-16 Brooks Stairlifts Ltd Stairlifts
GB0317618D0 (en) * 2003-07-28 2003-08-27 Stannah Stairlifts Ltd Improvements in or relating to stairlifts
NL2010014C2 (en) * 2012-12-19 2014-06-23 Thyssenkrupp Accessibility B V Stair lift drive with rotatable mounting part for seat.
EP3208225B1 (fr) * 2016-02-17 2018-11-07 thyssenkrupp Stairlifts B.V. Fauteuil monte-escalier
GB2566333B (en) * 2017-09-12 2022-10-12 Stannah Stairlifts Ltd Improvements in or relating to stairlifts

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3478618B1 (fr) * 2016-06-30 2020-09-09 Platinum Stairlifts Ltd Unité d'entraînement

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EP3770098A1 (fr) 2021-01-27

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