EP3770098A1 - 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
EP3770098A1
EP3770098A1 EP20173474.6A EP20173474A EP3770098A1 EP 3770098 A1 EP3770098 A1 EP 3770098A1 EP 20173474 A EP20173474 A EP 20173474A EP 3770098 A1 EP3770098 A1 EP 3770098A1
Authority
EP
European Patent Office
Prior art keywords
platform
driving gear
gear element
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.)
Granted
Application number
EP20173474.6A
Other languages
German (de)
English (en)
Other versions
EP3770098B1 (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
Original Assignee
Framo Morat & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Framo Morat & Co KG GmbH filed Critical Framo Morat & Co KG GmbH
Publication of EP3770098A1 publication Critical patent/EP3770098A1/fr
Application granted granted Critical
Publication of EP3770098B1 publication Critical patent/EP3770098B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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 slide guided thereon and a platform pivotably arranged on the slide, the inclination of which is adjusted with respect to the slide via a platform drive such 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 a staircase.
  • a platform arranged on a slide 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 slide is equipped with a slide drive that moves the slide along the support and guide rails.
  • the platform can accommodate a person sitting, standing or in a wheelchair.
  • the platform is adapted to the respective requirement. If a person is to be transported seated, the platform is designed as a seat. If a person is to be transported standing or in a wheelchair, the platform is equipped as a standing area with handles or special devices for the wheelchair.
  • a platform drive ensures that the platform is aligned horizontally and its horizontal alignment Maintained during transport even if the slope 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 platform drive which aligns the platform horizontally, must be robust and reliable and guarantee the horizontal alignment of the platform even in the event of damage.
  • 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 and tear 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 with respect to the slide such that the platform is aligned essentially horizontally regardless of the course of the support and guide rails, comprises a driven gear element, at least two driving gear elements and at least two motors.
  • the driven gear element is connected to the platform in such a way that a rotary movement of the driven gear element leads to a rotary movement of the platform.
  • the at least two driving transmission elements are constantly in engagement with the output transmission element.
  • one 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.
  • 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 one assigned to it Gear element. This transfers the drive torque to the driven gear element.
  • the drive torque can be increased or decreased according to a possible translation and the efficiency.
  • the platform drive for setting the inclination of the platform is thus divided into several power branches.
  • Each power branch includes a motor and a driving gear element.
  • the power branches are brought together at the driven gear element.
  • the torque with which the output transmission element is driven corresponds to the sum of the drive torques of the motors. In this case, however, the total torque is not transmitted in a single engagement between a driving gear element and the driven gear element, but rather distributed over several interventions.
  • the abrasion and thus the wear on an engagement depend on the load that acts on the engagement when a torque or a force is transmitted.
  • the distribution of the load over several interventions has the consequence that the wear per intervention is reduced compared to a transmission with only one intervention.
  • the stair lift according to the invention can thus be operated for significantly longer without failures due to wear than a stair lift in which the inclination of the platform is set 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 service branch fails, at least one further service branch is available. This guarantees that a safe state is maintained.
  • the failure of a service branch can be recognized on the basis of the at least one remaining, still functional service branch.
  • a control of the The platform drive can then ensure that the platform remains in a horizontal orientation and that the stairlift is stopped if necessary.
  • a failure of a power branch can be triggered, for example, by the failure of an engine or a gearbox damage.
  • the stairlift according to the invention thus has a reduced susceptibility to wear and tear and moreover ensures the horizontal alignment of the platform even if a power branch of the platform drive fails.
  • the platform is designed as a seat. One person can be transported seated.
  • 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 foldable seat, so that a person can be transported either sitting or standing.
  • the platform is equipped with a receptacle for a wheelchair.
  • the output gear element is designed as a gear.
  • This can have one or more teeth.
  • the toothing can be provided on the circumference and / or on the plane surface of the gearwheel.
  • the gear can be designed as a spur gear and / or as a plane-toothed gear and / or as an internally toothed gear.
  • the driving gear element for all driving gear elements is equipped with exactly one toothing in which all driving gear elements comb.
  • the driving gear elements act circumferentially offset or axially offset on the driven gear element.
  • the output gear element is equipped with a plurality of teeth.
  • Each toothing is assigned at least one of the driving gear elements, which meshes with the relevant toothing of the driven gear element.
  • the teeth can be qualitatively the same or different.
  • a first toothing of the driven gear element can be provided on the circumferential side and a second toothing on the plane surface.
  • the driving gear element can be made in one piece or in several pieces.
  • each gear element part can be assigned a toothing.
  • the driven gear element can be an assembly of several gear wheels with different or the same types of toothing.
  • the output gear element is designed as a worm wheel.
  • At least one of the driving gear elements is designed as a worm which meshes with the worm wheel.
  • the worm wheel has a globoid shape.
  • the globoid shape of the worm wheel is given by the contour of the teeth.
  • the teeth, which run essentially parallel to the axis of rotation of the worm wheel, are curved inward 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 leads to the fact that the output gear element designed as a worm wheel at least partially engages around a driving gear element designed as a worm.
  • the worm wheel is fixed and secured in the axial direction even if its axial securing fails.
  • At least one of the gear elements designed as a worm has a globoid 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 which delimit the central area.
  • This shape means that the worm at least partially engages around the worm wheel. The worm is held in its position by the worm wheel even if the axial securing of the worm fails.
  • the gear consisting of the driving gear element and the 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 an encoder which detects the angle or the path covered by the drive shaft of a motor or the driving gear element coupled to it or the driven gear element. This corresponds to the distance which, when the drive shaft of the motor or the driving gear element coupled to it or the driven gear element rotates by 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 at the same angle, depending on whether it is detected for the drive shaft, the driving gear element or the driven 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 detected on the basis of the backlash 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 occurs as a result.
  • the stopped first motor causes the first driving gear element coupled to it to rest. This applies accordingly to the output gear element which is in engagement with the first drive transmission element.
  • a movement of the second driving gear element, which is coupled to the second motor, and of the driven gear element is only possible to an extent that is given by the 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 distance or angle is recorded that the drive shaft of the second motor or the driving gear element coupled to it or the driven gear element covers from the first blockage to the second blockage.
  • the torsional backlash between the first driving gear element coupled to the first motor and the driven gear element is derived from this angle or path. The greater the angle or path, the greater the torsional backlash between the gear elements.
  • the torsional 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 torsional 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 covers from the first blockage to the second blockage.
  • the torsional backlash in relation 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 are driven. All other motors are then driven in a second direction of movement up to a second blockage. Then the angle or distance is determined which the driven gear element or the drive shafts of the driven motors or the driving gear elements coupled to them have covered between the two blockages.
  • the detected path or angle is compared with a predetermined limit value. If the limit value is exceeded, the stairlift is switched off. In this case, it is assumed that due to the torsional backlash, a reliable setting of the inclination of the platform can no longer be guaranteed.
  • FIG. 1 a first embodiment of a stair lift is shown schematically.
  • the stairlift comprises a support and guide rail 1 on which a slide 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 slide 2 is driven by a slide drive 3.
  • the slide drive 3 ensures a relative movement of the slide 2 with respect to the support and guide rail 1.
  • a platform 4 is movably arranged on the slide 2.
  • the slide 2 is equipped with a platform drive 5, which adjusts the inclination of the platform 4 with respect to the slide 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 an output gear element 6 designed as a worm wheel, two driving gear elements 7, 8 which are in engagement therewith, which are designed as worms, and two motors 9, 10. Each of the two motors 9, 10 drives one of the driving gear elements 7, 8. A support element 11, to which the platform 4 is fastened, is coupled to the driving gear element.
  • the platform drive 15 of the second Embodiment includes an output gear element 16, a first drive transmission element 17, a second drive transmission element 18, a first motor 19, a second motor 20 and a drive housing 21.
  • the output transmission element 16 is designed as a worm wheel as in the first embodiment.
  • the two driving gear elements 17, 18 are designed as worms.
  • the detailed representations according to Figures 5 and 6 show that the two driving transmission elements 17, 18 are in engagement with the output transmission element 16 and mesh therein.
  • 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 correspondingly 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 driven gear element 16 diametrically opposite one another.
  • 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 of the two driving gear elements 17, 18 aligned. The torques of the two motors 19, 20 are transmitted via the driving gear elements 17, 18 to the driven gear element 16.
  • the platform drive 15 is shown with the drive housing 21 closed.
  • the driven gear element 16 designed as a worm wheel can be seen in a plan view.
  • the worm wheel is equipped with several bores 22 on its flat side. These are used to connect a platform to the driven 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 abortive Gear element 16 is equipped with a spur toothing. The toothing is in accordance with the illustration Figure 2 not visible.
  • the driving gear element 26 and the two driving gear elements 27, 28 of a platform drive, otherwise not shown, are shown from a third 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 output gear element 26 differs from the two output gear elements 6 of the first and second exemplary embodiment in that it has a globoid shape.
  • two diametrically opposite teeth of the output 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 against the driving gear elements 27, 28 and the driven gear element 26 is secured against displacement in its axial direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Types And Forms Of Lifts (AREA)
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 true EP3770098A1 (fr) 2021-01-27
EP3770098B1 EP3770098B1 (fr) 2023-09-13

Family

ID=70616975

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Application Number Title Priority Date Filing Date
EP20173474.6A Active EP3770098B1 (fr) 2019-07-22 2020-05-07 Monte-escalier et procédé de fonctionnement d'un monte-escalier

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EP (1) EP3770098B1 (fr)
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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019887A1 (fr) * 1995-11-30 1997-06-05 Roeed Svein Erik Dispositif de levage
GB2358389A (en) * 1999-12-23 2001-07-25 Brooks Stairlifts Ltd Stairlift seat orientation controller
WO2014098575A1 (fr) * 2012-12-19 2014-06-26 Thyssenkrupp Accessibility B.V. Entraînement de monte-escalier ayant une partie de support rotative pour un siège
EP3208225A1 (fr) * 2016-02-17 2017-08-23 Thyssenkrupp Accessibility BV Fauteuil monte-escalier
WO2019053410A1 (fr) * 2017-09-12 2019-03-21 Stannah Stairlifts Ltd Perfectionnements apportés ou se rapportant à des monte-escaliers
EP3478618A1 (fr) * 2016-06-30 2019-05-08 Platinum Stairlifts Ltd Unité d'entraînement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1007770C2 (nl) * 1997-12-11 1999-06-14 Thyssen De Reus Bv Lift.
GB0317618D0 (en) * 2003-07-28 2003-08-27 Stannah Stairlifts Ltd Improvements in or relating to stairlifts

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019887A1 (fr) * 1995-11-30 1997-06-05 Roeed Svein Erik Dispositif de levage
GB2358389A (en) * 1999-12-23 2001-07-25 Brooks Stairlifts Ltd Stairlift seat orientation controller
WO2014098575A1 (fr) * 2012-12-19 2014-06-26 Thyssenkrupp Accessibility B.V. Entraînement de monte-escalier ayant une partie de support rotative pour un siège
EP3208225A1 (fr) * 2016-02-17 2017-08-23 Thyssenkrupp Accessibility BV Fauteuil monte-escalier
EP3478618A1 (fr) * 2016-06-30 2019-05-08 Platinum Stairlifts Ltd Unité d'entraînement
WO2019053410A1 (fr) * 2017-09-12 2019-03-21 Stannah Stairlifts Ltd Perfectionnements apportés ou se rapportant à des monte-escaliers

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Publication number Publication date
DE102019119770A1 (de) 2021-01-28
EP3770098B1 (fr) 2023-09-13

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