EP3770098B1 - Stairlift and method for operating same - Google Patents
Stairlift and method for operating same Download PDFInfo
- 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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- European Patent Office
- Prior art keywords
- driving gear
- gear element
- platform
- motor
- stairlift
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- 238000000034 method Methods 0.000 title claims description 6
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000004015 abortifacient agent Substances 0.000 description 1
- 231100000641 abortifacient agent Toxicity 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Classifications
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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
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- 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.
Description
Die Erfindung geht aus von einem Treppenlift mit einer Trag- und Führungsschiene, einem daran geführten Schlitten und einer schwenkbar an dem Schlitten angeordneten Plattform, deren Neigung gegenüber dem Schlitten über einen Plattform-Antrieb derart eingestellt wird, dass die Plattform horizontal ausgerichtet ist.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.
Treppenlifte werden auch als Treppenaufzug oder Treppenschrägaufzug bezeichnet. Sie dienen dazu, eine Person oder eine Last im Bereich einer Treppe nach oben oder unten zu transportieren. Dabei wird eine an einem Schlitten angeordnete Plattform entlang einer Trag- und Führungsschiene bewegt, welche an der Treppe, beispielsweise an einer Wand neben der Treppe oder an den Treppenstufen, angeordnet ist. Hierzu ist der Schlitten mit einem Schlitten-Antrieb ausgestattet, der den Schlitten entlang der Trag- und Führungsschiene bewegt. Die Plattform kann eine Person sitzend, stehend oder in einem Rollstuhl aufnehmen. Hierzu ist die Plattform entsprechend an die jeweilige Anforderung angepasst. Soll eine Person sitzend transportiert werden, so ist die Plattform als Sitz ausgebildet. Soll eine Person stehend oder in einem Rollstuhl transportiert werden, so ist die Plattform als Standfläche mit Griffen oder speziellen Einrichtungen für den Rollstuhl ausgestattet. Ein Plattform-Antrieb sorgt dafür, dass die Plattform horizontal ausgerichtet ist und ihre horizontale Ausrichtung beim Transport auch dann beibehält, wenn sich die Steigung der Trag- und Führungsschiene aufgrund des Verlaufs der Treppe ändert. So kann die Treppe beispielsweise eine Kurve oder einen Treppenabsatz aufweisen und damit Abschnitte mit unterschiedlichen Steigungen.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. For this purpose, 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. For this purpose, 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. For example, the staircase can have a curve or a landing and thus sections with different gradients.
Die
Da der Treppenlift der Beförderung von Personen dient, werden an ihn besondere Anforderungen in Bezug auf die Sicherheit gestellt. Der Plattform-Antrieb, welcher die Plattform horizontal ausrichtet, muss robust und zuverlässig sein und auch im Falle einer Beschädigung die horizontale Ausrichtung der Plattform garantieren.Since the stair lift is used to transport people, it has special requirements in terms of safety. 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.
Der Erfindung liegt die Aufgabe zugrunde, einen Treppenlift und ein Verfahren zum Betreiben eines Treppenlifts zur Verfügung zu stellen, die eine geringe Anfälligkeit gegen Verschleiß des Treppenlifts garantieren und welche auch bei einer Beschädigung die horizontale Ausrichtung der Plattform sicherstellen.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.
Diese Aufgabe wird durch einen Treppenlift mit den Merkmalen des Anspruchs 1 und durch ein Verfahren mit den Merkmalen des Anspruchs 16 gelöst. Der Plattform-Antrieb, der die Neigung der Plattform gegenüber dem Schlitten derart einstellt, dass die Plattform unabhängig vom Verlauf der Trag- und Führungsschiene im wesentlichen horizontal ausgerichtet ist, umfasst ein abtreibendes Getriebeelement, mindestens zwei antreibende Getriebeelemente und mindestens zwei Motoren. Dabei ist das abtreibende Getriebeelement mit der Plattform derart verbunden, dass eine Drehbewegung des abtreibenden Getriebeelements zu einer Drehbewegung der Plattform führt. Die mindestens zwei antreibenden Getriebeelemente stehen ständig in Eingriff mit dem abtreibenden Getriebeelement. Jeweils ein Motor ist mit einem antreibenden Getriebeelement verbunden. Dabei ist das antreibende Getriebeelement an eine Antriebswelle des ihr zugeordneten Motors direkt oder indirekt gekoppelt. Zwischen dem Motor und dem ihm zugeordneten antreibenden Getriebeelement können weitere Getriebestufen vorgesehen sein. Jeder der Motoren überträgt sein Antriebsdrehmoment auf das ihm zugeordnete antreibende Getriebeelement. Dieses überträgt das Antriebsdrehmoment auf das abtreibende Getriebeelement. Dabei kann das Antriebsdrehmoment entsprechend einer eventuellen Übersetzung und dem Wirkungsgrad vergrößert oder verkleinert werden.This task is achieved by a stair lift with the features of
Der Plattform-Antrieb zur Einstellung der Neigung der Plattform ist damit aufgeteilt auf mehrere Leistungszweige. Dabei umfasst jeder Leistungszweig einen Motor und ein antreibendes Getriebeelement. Die Leistungszweige werden am abtreibenden Getriebeelement zusammengeführt.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.
Da mehrere antreibende Getriebeelemente in Wirkeingriff mit dem abtreibenden Getriebeelement stehen, addieren sich die Antriebsdrehmomente der einzelnen Motoren. Das Drehmoment, mit dem das abtreibende Getriebeelement angetrieben wird, entspricht somit der Summe der Antriebsdrehmomente der Motoren. Dabei wird das Gesamt-Drehmoment jedoch nicht an einem einzigen Eingriff zwischen einem antreibenden Getriebeelement und dem abtreibenden Getriebeelement übertragen, sondern auf mehrere Eingriffe verteilt. Der Abrieb und damit der Verschleiß an einem Eingriff hängen von der Last ab, die auf den Eingriff beim Übertragen eines Drehmomentes oder einer Kraft wirkt. Das Verteilen der Last auf mehrere Eingriffe hat damit zur Folge, dass der Verschleiß je Eingriff gegenüber einem Getriebe mit nur einem Eingriff reduziert wird. Der erfindungsgemäße Treppenlift kann damit wesentlich länger ohne verschleißbedingte Ausfälle betrieben werden als ein Treppenlift, bei dem die Neigung der Plattform über einen Plattform-Antrieb mit nur einem Motor eingestellt wird.Since several driving gear elements are in active engagement with the driving gear element, the drive torques of the individual motors add up. The torque with which the driving gear element is driven therefore corresponds to the sum of the drive torques of the motors. However, 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.
Die Aufteilung des Plattform-Antriebs auf mehrere Leistungszweige führt darüber hinaus zu einem redundanten Antriebssystem. Bei Ausfall eines Leistungszweigs steht mindestens ein weiterer Leistungszweig zur Verfügung. Dieser garantiert, dass ein sicherer Zustand aufrecht erhalten bleibt. Der Ausfall eines Leistungszweigs kann anhand des mindestens einen verbleibenden, noch funktionsfähigen Leistungszweiges erkannt werden. Eine Steuerung des Plattform-Antriebs kann dann sicherstellen, dass die Plattform in einer horizontalen Ausrichtung verbleibt und dass gegebenenfalls der Treppenlift angehalten wird. Ein Ausfall eines Leistungszweigs kann beispielsweise durch den Ausfall eines Motors oder durch einen Getriebeschaden ausgelöst sein.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.
Der erfindungsgemäße Treppenlift weist damit eine reduzierte Anfälligkeit gegenüber Verschleiß auf und stellt darüber hinaus auch bei einem Ausfall eines Leistungszweigs des Plattform-Antriebs die horizontale Ausrichtung der Plattform sicher.The stair lift according to the invention therefore has a reduced susceptibility to wear and also ensures the horizontal alignment of the platform even if one power branch of the platform drive fails.
Nach einer vorteilhaften Ausgestaltung der Erfindung ist die Plattform als Sitz ausgebildet. Eine Person kann damit sitzend transportiert werden.According to an advantageous embodiment of the invention, the platform is designed as a seat. One person can be transported in a sitting position.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Plattform als Stehplattform für eine Person ausgebildet. Sie weist darüber hinaus einen Haltegriff für eine Person auf. Die Stehplattform kann mit einem Sitz, beispielsweise einem klappbaren Sitz kombiniert sein, so dass eine Person wahlweise sitzend oder stehend transportiert werden kann.According to a further advantageous embodiment of the invention, 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.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Plattform mit einer Aufnahme für einen Rollstuhl ausgestattet.According to a further advantageous embodiment of the invention, the platform is equipped with a holder for a wheelchair.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist das abtreibenden Getriebeelement als Zahnrad ausgebildet. Dieses kann eine oder mehrere Verzahnungen aufweisen. Die Verzahnung kann umfangsseitig und/ oder an der Planfläche des Zahnrades vorgesehen sein. Entsprechend kann das Zahnrad als Stirnrad und/ oder als planverzahntes Zahnrad und/ oder als innenverzahntes Zahnrad ausgebildet sein.According to a further advantageous embodiment of the invention, the driving 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 flat surface of the gear. Accordingly, the gear can be designed as a spur gear and/or as a face-toothed gear and/or as an internally-toothed gear.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist das abtreibende Getriebeelement für alle antreibenden Getriebeelemente mit genau einer Verzahnung ausgestattet, in welcher alle antreibenden Getriebeelemente kämmen. Die antreibenden Getriebeelemente greifen dabei umfangsseitig versetzt oder axial versetzt an dem abtreibenden Getriebeelement an.According to a further advantageous embodiment of the invention, 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.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist das abtreibende Getriebeelement mit mehreren Verzahnungen ausgestattet. Jeder Verzahnung ist mindestens eines der antreibenden Getriebeelemente zugeordnet, das in der betreffenden Verzahnung des abtreibenden Getriebeelements kämmt. Die Verzahnungen können dabei qualitativ übereinstimmen oder verschieden sein. Beispielsweise kann eine erste Verzahnung des abtreibenden Getriebeelements umfangsseitig vorgesehen sein und eine zweite Verzahnung an der Planfläche. Das abtreibende Getriebeelement kann einteilig oder mehrteilig ausgeführt sein. Bei einer mehrteiligen Ausführungsform kann jedem Getriebeelement-Teil eine Verzahnung zugeordnet sein. So kann beispielsweise das abtreibende Getriebeelement eine Baugruppe aus mehreren Zahnrädern mit unterschiedlichen oder gleichen Arten von Verzahnungen sein.According to a further advantageous embodiment of the invention, 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. For example, 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. In a multi-part embodiment, each gear element part can be assigned a toothing. For example, the driving gear element can be an assembly of several gears with different or the same types of toothing.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist das abtreibende Getriebeelement als Schneckenrad ausgebildet. Mindestens eines der antreibenden Getriebeelemente ist als Schnecke ausgebildet, welche in dem Schneckenrad kämmt.According to a further advantageous embodiment of the invention, 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.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung weist das Schneckenrad eine globoidische Form auf. Die globoidische Form des Schneckenrades wird durch die Kontur der Zähne vorgegeben. Die im wesentlichen parallel zur Drehachse des Schneckenrades verlaufenden Zähne sind derart nach innen gewölbt, dass der Abstand der äußeren Kontur der Zähne zur Drehachse des Schneckenrades an den Rändern größer ist als in einem mittleren Bereich zwischen den Rändern. Die Form der führt dazu, dass das als Schneckenrad ausgebildete abtreibende Getriebeelement ein als Schnecke ausgebildetes antreibendes Getriebeelement zumindest teilweise umgreift.According to a further advantageous embodiment of the invention, 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.
Dadurch ist das Schneckenrad ist axialer Richtung auch dann festgelegt und gesichert, wenn seine Axialsicherung versagt.This means that the worm wheel is fixed and secured in the axial direction even if its axial lock fails.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung weist mindestens eines der als Schnecke ausgebildeten Getriebeelemente eine globoidische Form auf. In diesem Fall ist der äußere Durchmesser der Schnecke in axialer Richtung unterschiedlich: in einem mittleren Bereich ist der äußere Durchmesser kleiner als an den beiden Randbereichen, die den mittleren Bereich begrenzen. Diese Form führt dazu, dass die Schnecke das Schneckenrad zumindest teilweise umgreift. Die Schnecke wird vom Schneckenrad auch dann in ihrer Position gehalten, wenn die Axialsicherung der Schnecke versagt.According to a further advantageous embodiment of the invention, at least one of the gear elements designed as a worm has a globoidal shape. In this case, 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.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist das aus abtreibendem Getriebeelement und antreibenden Getriebeelementen bestehende Getriebe als selbsthemmendes Getriebe ausgebildet.According to a further advantageous embodiment of the invention, the gear consisting of a driving gear element and driving gear elements is designed as a self-locking gear.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist mindestens einer der Motoren mit einer Bremse ausgestattet.According to a further advantageous embodiment of the invention, at least one of the motors is equipped with a brake.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Bremse eine elektromechanische Bremse.According to a further advantageous embodiment of the invention, the brake is an electromechanical brake.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Bremse eine magnetische Bremse.According to a further advantageous embodiment of the invention, the brake is a magnetic brake.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist der Plattform-Antrieb mit einem Geber ausgestattet, welcher den Winkel oder den Weg erfasst, den die Antriebswelle eines Motors oder das an sie gekoppelte antreibende Getriebeelement oder das abtreibende Getriebeelement zurücklegt. Der entspricht dabei der Strecke, die bei einer Rotation der Antriebswelle des Motors oder des an sie gekoppelten antreibenden Getriebeelementes oder des abtreibenden Getriebeelementes um einen Winkel entlang der jeweiligen Umfangsseite zurückgelegt wird. Da der Weg vom Radius der Antriebswelle oder des jeweiligen Getriebeelements abhängt, ist der Weg bei übereinstimmendem Winkel verschieden, je nachdem ob er für die Antriebswelle, das antreibende Getriebeelement oder das abtreibende Getriebeelement erfasst wird.According to a further advantageous embodiment of the invention, 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.
Das erfindungsgemäße Verfahren mit den Merkmalen des Anspruchs 16 zeichnet sich dadurch aus, dass der Verschleiß der Getriebeelemente anhand des Verdrehspiels der Getriebeelemente erfasst wird. Hierzu wird ein erster Motor der mindestens zwei Motoren angehalten. Ein zweiter Motor der mindestens zwei Motoren treibt das an seine Antriebswelle gekoppelte antreibende Getriebeelement so lange in eine erste Bewegungsrichtung an, bis es aufgrund des angehaltenen ersten Motors blockiert wird und dadurch eine erste Blockade eintritt. Der angehaltene erste Motor führt dazu, dass das an ihn gekoppelte erste antreibende Getriebeelement ruht. Dies gilt entsprechend für das abtreibende Getriebeelement, welches mit dem ersten antreibenden Getriebeelement in Eingriff steht. Eine Bewegung des an den zweiten Motor gekoppelten zweiten antreibenden Getriebeelements und des abtreibenden Getriebeelements ist nur in einem Umfang möglich, der durch ein Spiel zwischen den Getriebeelementen gegeben ist. Anschließend treibt der zweite Motor das an seine Antriebswelle gekoppelte antreibende Getriebeelement so lange in die entgegengesetzte zweite Bewegungsrichtung an, bis es aufgrund des angehaltenen ersten Motors erneut blockiert wird und dadurch eine zweite Blockade eintritt. Der Weg oder Winkel wird erfasst, den die Antriebswelle des zweiten Motors oder das an sie gekoppelte antreibende Getriebeelement oder das abtreibenden Getriebeelement von der ersten Blockade bis zur zweiten Blockade zurücklegt. Aus diesem Winkel oder Weg wird das Verdrehspiel zwischen dem an den ersten Motor gekoppelten ersten antreibenden Getriebeelement und dem abtreibenden Getriebeelement abgeleitet. Je größer der Winkel oder Weg ist, umso größer ist der Verdrehspiel zwischen den Getriebeelementen. Das Verdrehspiel in Bezug auf das an den zweiten Motor gekoppelten zweiten antreibenden Getriebeelement und dem abtreibenden Getriebeelement kann entsprechend bestimmt werden, indem der zweite Motor angehalten wird und der erste Motor in eine erste Bewegungsrichtung bis zu einer ersten Blockade angetrieben wird und anschließend in eine zweite Bewegungsrichtung bis zu einer zweiten Blockade. Aus dem Winkel oder Weg, den die Antriebswelle des ersten Motors oder das an sie gekoppelte antreibende Getriebeelement oder das abtreibende Getriebeelement von der ersten Blockade bis zur zweiten Blockade zurücklegt wird das Verdrehspiel zwischen dem zweiten antreibenden Getriebeelement und dem abtreibenden Getriebeelement abgeleitet. Ist der Plattform-Antrieb mit mehr als zwei Motoren und ihnen zugeordneten antreibenden Getriebeelementen ausgestattet, so wird das Verdrehspiel in Bezug auf eines der antreibenden Getriebeelemente bestimmt, indem der ihm zugeordnete Motor angehalten wird und alle anderen Motoren zunächst in einer erste Bewegungsrichtung bis zu einer ersten Blockade angetrieben werden. Anschließend werden alle anderen Motoren in eine zweite Bewegungsrichtung bis zu einer zweiten Blockade angetrieben. Danach wird der Winkel oder Weg bestimmt, den das abtreibende Getriebeelement oder die Antriebswellen der angetriebenen Motoren oder die an sie gekoppelten antreibende Getriebeelemente zwischen den beiden Blockaden zurückgelegt haben.The method according to the invention with the features of
Aus einer Zunahme des Verdrehspiels über der Zeit kann auf den Verschleiß der Getriebeelemente geschlossen werden. Aufgrund der Reibung, welche zwischen den in Eingriff stehenden Getriebeelementen wirkt, findet ein Abrieb der Getriebeelemente statt. Dieser führt dazu, dass beispielsweise bei Zahnrädern die Zahndicke im Lauf der Zeit abnimmt. Wenn die Zahndicke einen vorgegebenen kritischen Wert unterschreitet, ist der Antrieb nicht mehr in der Lage, die geforderten Momente auf die Plattform zu übertragen. Mit abnehmender Zahndicke nimmt das Verdrehspiel zu. Überschreitet das Verdrehspiel einen vorgegebenen Grenzwert, wird angenommen, dass die Zahndicke unterhalb des kritischen Wertes liegt. Aus Sicherheitsgründen wird in diesem Fall der Treppenlift außer Betrieb gesetzt.An increase in torsional play over time can indicate wear on the gear elements. Due to the friction that acts between the meshing gear elements, abrasion of the gear elements occurs. This leads to the tooth thickness of gears, for example, decreasing over time. If the tooth thickness falls below a specified critical value, the drive is no longer able to transmit the required torque to the platform. As the tooth thickness decreases, the torsional backlash increases. If the torsional backlash exceeds a specified limit, it is assumed that the tooth thickness is below the critical value. For safety reasons, the stair lift will be taken out of operation in this case.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung wird der erfasste Weg oder Winkel mit einem vorgegebenen Grenzwert verglichen. Bei Überschreiten des Grenzwertes wird der Treppenlift abgeschaltet. In diesem Fall wird davon ausgegangen, dass aufgrund des Verdrehspiels eine zuverlässige Einstellung der Neigung der Plattform nicht mehr gewährleistet werden kann.According to a further advantageous embodiment of the invention, 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.
Weitere Vorteile und vorteilhafte Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.Further advantages and advantageous refinements of the invention can be found in the following description, the drawing and the claims.
In der Zeichnung sind mehrere Ausführungsbeispiele eines erfindungsgemäßen Treppenlifts dargestellt. Es zeigen:
Figur 1- schematische Darstellung eines ersten Ausführungsbeispiels eines Treppenlifts,
Figur 2- Plattform-Antrieb eines zweiten Ausführungsbeispiels eines Treppenlifts in einer Ansicht von vorne,
Figur 3- Plattform-
Antrieb gemäß Figur 2 in einer Seitenansicht, Figur 4- Plattform-
Antrieb gemäß Figur 2 in einer Schnittdarstellung entlang der in mit D-D gekennzeichneten Ebene,Figur 3 Figur 5Detail aus Figur 4 betreffend den Eingriff der ersten Schnecke in das Schneckenrad,Figur 6Detail aus Figur 4 betreffend den Eingriff der zweiten Schnecke in das Schneckenrad,Figur 7- Schneckenrad und Schnecken eines dritten Ausführungsbeispiels eines Treppenlifts in Schnittdarstellung.
- Figure 1
- schematic representation of a first exemplary embodiment of a stair lift,
- Figure 2
- Platform drive of a second embodiment of a stair lift in a view from the front,
- Figure 3
- Platform drive according to
Figure 2 in a side view, - Figure 4
- Platform drive according to
Figure 2 in a sectional view along the inFigure 3 level marked DD, - Figure 5
- detail
Figure 4 regarding the engagement of the first worm in the worm wheel, - Figure 6
- detail
Figure 4 regarding the engagement of the second worm in the worm wheel, - Figure 7
- Worm wheel and worms of a third embodiment of a stair lift in a sectional view.
In
In den
In den
In
- 11
- Trag- und FührungsschieneSupport and guide rail
- 22
- SchlittenSleds
- 33
- Schlitten-AntriebCarriage drive
- 44
- Plattformplatform
- 55
- Plattform-AntriebPlatform drive
- 66
- Abtreibendes GetriebeelementAbsorbing gear element
- 77
- Antreibendes GetriebeelementDriving gear element
- 88th
- Antreibendes GetriebeelementDriving gear element
- 99
- Motorengine
- 1010
- Motorengine
- 1111
- TragelementSupport element
- 12 13 14 1512 13 14 15
- Plattform-AntriebPlatform drive
- 1616
- Abtreibendes GetriebeelementAbsorbing gear element
- 1717
- Erstes antreibendes GetriebeelementFirst driving gear element
- 1818
- Zweites antreibendes GetriebeelementSecond driving gear element
- 1919
- Erster MotorFirst engine
- 2020
- Zweiter MotorSecond engine
- 2121
- AntriebsgehäuseDrive housing
- 2222
- Bohrungdrilling
- 23 24 25 2623 24 25 26
- Abtreibendes GetriebeelementAbsorbing gear element
- 2727
- Antreibendes GetriebeelementDriving gear element
- 2828
- Antreibendes GetriebeelementDriving gear element
Claims (17)
- Stairliftwith a support and guide rail (1),with a carriage (2) guided on the support and guide rail (1),with a platform (4) pivotally mounted on the carriage (2),with a platform drive (5, 15) 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,wherein the platform drive (5, 15) comprises a driven gear element (6, 16, 26) connected to the platform (4), at least two driving gear elements (7, 8, 17, 18, 27, 28) and at least two motors (9, 10, 19, 20),wherein a drive shaft of each motor (9, 10, 19, 20) is coupled to a respective driving gear element (7, 8, 17, 18, 27, 28) for transmitting a torque, such that a plurality of power branches are provided and each power branch comprises a motor (9, 10, 19, 20) and a driving gear element (7, 8, 17, 18, 27, 28),characterized in thatat least two driving gear elements (7, 8, 17, 18, 27, 28) are engaged with the driven gear element (6, 16, 26), and the power branches are brought together at the driven gear element (6, 16, 26).
- Stairlift according to claim 1, characterized in that the platform (4) is designed as a seat.
- Stairlift according to claim 1, characterized in that the platform (4) is designed as a standing platform for a person, and that the standing platform is provided with handholds for the person.
- Stairlift according to claim 1, characterized in that the platform (4) is designed to accommodate a wheelchair.
- Stairlift according to one of the preceding claims, characterized in that the driven gear element (6, 16, 26) is designed as a gearwheel.
- Stairlift according to one of the preceding claims, characterized in that the driven gear element (6, 16, 26) for all driving gear elements (7, 8, 17, 18, 27, 28) is provided with exactly one toothing in which all driving gear elements (7, 8, 17, 18, 27, 28) mesh.
- Stairlift according to one of claims 1 to 5, characterized in that the driven gear element (6, 16, 26) is provided with a plurality of toothings, wherein each toothing is associated with at least one of the driving gear elements (7, 8, 17, 18, 27, 28) which meshes in the relevant toothing of the driven gear element (6, 16, 26).
- Stairlift according to one of the preceding claims, characterized in that the driven gear element (6, 16, 26) is designed as a worm gear, and that at least one of the driving gear elements (7, 8, 17, 18, 27, 28) is designed as a worm which meshes with the worm gear.
- Stairlift according to claim 8, characterized in that the worm wheel (26) has a globoidal shape.
- Stairlift according to claim 8 or 9, characterized in that at least one of the gear elements designed as a worm has a globoidal shape.
- Stairlift according to one of the preceding claims, characterized in that the transmission consisting of driven gear element (6, 16, 26) and driving gear elements (7, 8, 17, 18, 27, 28) is designed as a self-locking transmission.
- Stairlift according to one of the preceding claims, characterized in that at least one of the motors (9, 10, 19, 20) is provided with a brake.
- Stairlift according to claim 12, characterized in that the brake is an electromechanical brake.
- Stairlift according to claim 12, characterized in that the brake is a magnetic brake.
- Stairlift according to one of the preceding claims, characterized in that the platform drive (5) is provided with an encoder which detects the angle or the distance covered by the drive shaft of a motor (9, 10, 19, 20) or the driving gear elements (7, 8, 17, 18, 27, 28) coupled thereto or the driven gear element (6, 16, 26).
- Method for operating a stairlift according to one of claims 1 to 15, characterized in that the wear of the gear elements (6, 7, 8, 16, 17, 18, 26, 27, 28) is detected by means of the torsional backlash of the gear elements (6, 7, 8, 16, 17, 18, 26, 27, 28), in which a first motor (9, 19) of the at least two motors is stopped and a second motor (10, 20) of the at least two motors drives the driving gear element (8, 18, 28) coupled to its drive shaft in a first direction of movement until it is blocked by the stopped first motor (9, 19) and thereby a first blockage occurs, that subsequently the second motor (10, 20) drives the driving gear element (8, 18, 28) coupled to its drive shaft in the opposite second direction of movement until it is blocked by the stopped first motor (9, 19) and thereby a second blockage occurs, and that the distance or angle which the drive shaft of the second motor (10, 20) or the driving gear element (8, 18, 28) coupled thereto or the driven gear element (6, 16, 26) covers from the first blockage to the second blockage is detected.
- Method according to claim 16, characterized in that the detected distance or angle is compared with a predetermined limit value and that the stairlift is switched off if the limit value is exceeded.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102019119770.8A DE102019119770A1 (en) | 2019-07-22 | 2019-07-22 | Stairlift and method of operating a stairlift |
Publications (2)
Publication Number | Publication Date |
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EP3770098A1 EP3770098A1 (en) | 2021-01-27 |
EP3770098B1 true EP3770098B1 (en) | 2023-09-13 |
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EP20173474.6A Active EP3770098B1 (en) | 2019-07-22 | 2020-05-07 | Stairlift and method for operating same |
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DE (1) | DE102019119770A1 (en) |
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DE102022002787A1 (en) | 2022-08-01 | 2024-02-01 | Abm Greiffenberger Antriebstechnik Gmbh | Drive for a moving object |
Citations (1)
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EP3478618B1 (en) * | 2016-06-30 | 2020-09-09 | Platinum Stairlifts Ltd | Drive unit |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO954872L (en) * | 1995-11-30 | 1997-06-02 | Svein Erik Roeed | Hoisting device |
NL1007770C2 (en) * | 1997-12-11 | 1999-06-14 | Thyssen De Reus Bv | Elevator. |
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. |
ES2710505T3 (en) * | 2016-02-17 | 2019-04-25 | Thyssenkrupp Ag | Elevator stairs |
GB2566333B (en) * | 2017-09-12 | 2022-10-12 | Stannah Stairlifts Ltd | Improvements in or relating to stairlifts |
-
2019
- 2019-07-22 DE DE102019119770.8A patent/DE102019119770A1/en active Pending
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EP3478618B1 (en) * | 2016-06-30 | 2020-09-09 | Platinum Stairlifts Ltd | Drive unit |
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