WO2017126963A1 - Roue comportant un moteur électrique logé dans la roue - Google Patents

Roue comportant un moteur électrique logé dans la roue Download PDF

Info

Publication number
WO2017126963A1
WO2017126963A1 PCT/NL2017/050032 NL2017050032W WO2017126963A1 WO 2017126963 A1 WO2017126963 A1 WO 2017126963A1 NL 2017050032 W NL2017050032 W NL 2017050032W WO 2017126963 A1 WO2017126963 A1 WO 2017126963A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
rotor
stator
rim
permanent magnets
Prior art date
Application number
PCT/NL2017/050032
Other languages
English (en)
Inventor
Adrianus Johannes Heinen
Original Assignee
E-Traction Europe B.V.
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 E-Traction Europe B.V. filed Critical E-Traction Europe B.V.
Publication of WO2017126963A1 publication Critical patent/WO2017126963A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/04—Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/44—Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the invention relates to a wheel comprising an in-wheel electric motor, said electric motor comprising permanent magnets and electromagnets.
  • Wheels driven by an electric motor are known.
  • the electric motor can be provided in the vehicle and drive the axis of the wheel to rotate the wheel. This requires the electric motor to be located in the vehicle. Another possibility is to position the electric motor in the wheel itself.
  • Such wheels having an in-wheel electric motor are known as well.
  • Part of the electric motor is generally coupled to the rim of the wheel, the rim carrying the tire of the wheel.
  • Another part of the in-wheel electric motor is generally positioned centrally in the wheel and will constitute a non-rotating part of the wheel.
  • the non-rotating part and part coupled to the rim are generally referred to as stator and rotor.
  • the interaction between rotor and stator is magnetic, at least one of the rotor and stator comprising electromagnets.
  • a wheel comprising an in-wheel electric motor, said electric motor comprising permanent magnets and electromagnets, wherein the permanent magnets and the electromagnets are placed in com partments of the wheel that are open to ingress and egress of the environment, and are hermetically sealed from the environment, especially by plating or coating with a hermetically sealing coating.
  • the hermetically sealing coating comprises
  • the electromagnets comprise a metal core and windings of a conducting wire.
  • the metal core comprises layers of a ferrous metal.
  • the hermetically sealing coating is formed by applying a powder coating, especially by electrostatically applying a powder coating, and curing the powder coating, especially at a high temperature, to achieve an optimal protective layer.
  • the wheel of further comprises electronics placed in an electronics compartment that is open to ambient air and sealed off from water and dirt.
  • the electronics compartment is provided with one or more filters that are permeable to air and impermeable to liquid water, especially permeable to water vapor in one direction and impermeable to liquid water in an opposing direction.
  • the electric motor comprises a rotor and a stator separated by an air gap having a width in the range of 1 to 5 mm, especially 1 .6 mm to 3 mm in the absence of any mechanical impact on the wheel.
  • stator is mechanically configured such that any mechanical impact acting on the wheel during driving incidentally and locally reduces a width of the air gap to a value in the range of 0.5 mm to 1 mm .
  • the rotor has a substantially cylindrical shape having a diameter and an axis, said rotor having an axle hub configured for mating with a shaft, especially a spline axle, in a form fixed connection .
  • the axle hub has a length in the range of 30% to 75% of the length of the spline axle.
  • a first end of the cylindrically shaped rotor is attached to the shaft, a bearing being provided at the first end of the rotor between rotor and stator, and characterized by the absence of a bearing between the cylindrical shape of the rotor and the stator at a second end of the rotor.
  • the wheel is capable of bearing a weight of up to 6000 kilograms.
  • a first end of the cylindrically shaped rotor is attached to the shaft, a bearing being provided at the first end of the rotor between rotor and stator, and characterized by another bearing provided between the cylindrical shape of the rotor and the stator at a second end of the rotor.
  • the wheel is capable of bearing a weight of up to 12000 kilograms.
  • the rotor comprises a first material, especially a first metal, having a magnetic permeability ( ⁇ ) of at least 5.0x10 "3 H nr 1 at non-saturated conditions, and a second material, especially a second metal, having yield strength of at least 700 MPa.
  • the permanent magnets are embedded in the first material.
  • the second material surrounds the first material at an external perimeter.
  • the wheel comprises interlocking components between rotor and stator.
  • interlocking components define a labyrinth for letting moisture ingress and egress between the permanent magnets and the electromagnets and keeping dirt out.
  • the rim comprises a demountable rim flange.
  • the demountable rim flange comprises a wedge-shaped flange element and a circular retainer element, the wedge-shaped element being configured for sliding onto the rim, and the rim comprising a retainer groove having an opening at a side of the retainer groove for receiving the retainer element so as to allow sliding the retainer element into the retainer groove, the retainer element retaining the flange element on the rim when the retainer element has been slid into the retainer groove.
  • Figure 2 shows the rotating part of the wheel of figure 1 , without a shaft
  • Figure 3 shows the static part of the wheel and the shaft of the rotating part
  • Figure 4 shows the electromagnets of the electric motor of the wheel of figure 1 ;
  • Figure 5a and 5b shows details of the permanent magnets and electromagnets with a coating provided
  • Figure 6 shows another embodiment of a wheel according to the invention:
  • Figure 7 shows an exploded view of the rim of the wheel shown in figures 1 and 6;
  • Figure 8 shows details of a back plate of the wheel shown in figures 1 and 6.
  • a wheel 10 for a vehicle such as a car, bus or truck, is shown in figure 1 and comprises a rotating part 100 and a static part 200.
  • An electric motor 12 is arranged inside the wheel to provide for an in-wheel electric motor.
  • a tire 1 1 is mounted on a rim 120 of the wheel, the rim being fixedly attached to a shaft 130 through its integral front plate 121. The rim and shaft are rotating parts of the wheel in the embodiment shown.
  • the electric motor comprises a rotor arranged on the rotating part 100 and a stator arranged on the static part 200.
  • the rotor is provided with permanent magnets 1 10 as shown in more detail in figure 2, and the stator is provided with electromagnets 210, as shown in more detail in figure 3, that are shaped as coils 21 1 and layers of a ferrous metal 212 in the embodiment shown.
  • a phase and direction of electrical currents through the electromagnets is controlled so as to provide forces between the electromagnets of the stator and permanent magnets of the rotorto induce rotation of the rotor with respect to the stator.
  • Such techniques are generally known and will not be further explained in the present description.
  • the rotathg part 100 as a whole may be referred to as the rotor, and the static part 200 as a whole may be referred to as the stator.
  • Bearings 13 are provided in between rotating part 100 and static part 200.
  • the rotating part 100 excluding the shaft 130, is shown as an individual part in figure 2.
  • the permanent magnets are mounted on a bushing 1 12.
  • the material of the bushing 1 12 is selected for its good magnetic flux guiding properties.
  • the permanent magnets 1 10 may be glued and/or mechanically fixed, such as by appropriate bolts, to the bushing. Since the bushing is selected for its magnetic flux guiding properties, the material of the rim can be selected for mechanical strength.
  • the bushing is mounted inside the rim by a press fitting. Additionally or alternatively, a glue can be applied for mounting the bushing 1 12 inside the rim 120.
  • the bushing comprises a first material, especially a metal, having a magnetic permeability ( ⁇ ) of at least 5.0x10 "3 H nr 1 at non-saturated conditions to provide for the appropriate magnetic flux guiding properties.
  • the rim comprises a second material, especially a metal, having a yield strength of at least 700 M Pa to provide for the required strength.
  • the rotor therefore comprises both these first and second materials, especially first and second metals, to provide the appropriate flux guiding properties and mechanical strength.
  • the permanent magnets are, at least partially, embedded in the first material, especially the first metal.
  • the second material, especially the second metal surrounds the first material at an external perimeter thereof.
  • FIG. 3 shows the static part 200 as an individual part, and the shaft 130 of the rotating 100.
  • Electromagnets 210 are mounted on the outside of the stator 200.
  • the electromagnets 21 0 comprise a metal core 212 and windings of a conducting wire 21 1 a as shown in figure 4.
  • the metal core 212 comprises layers of a ferrous metal.
  • the static part 200 is mounted inside the rotating part 1 00 so that the rotor surrounds the stator, while leaving an air gap 14 between the permanent magnets 1 1 0 and electromagnets 210.
  • the permanent and electromagnets 1 10, 21 0 and air gap 14 are placed in an open compartment 1 5 of the wheel 1 0.
  • On its outside the open compartment is bounded by the rim 120, shaft 1 30, front plate 121 and a back plate 220.
  • a gap 15a is present between the back plate 1 5 and the rim 120 so that the open compartment 15 is open to ingress and egress of the environment E outside the wheel.
  • a labyrinth seal 15b is provided in the gap 1 5a provides a protection barrier against larger contamination, but is still open to moisture and water penetrating the labyrinth seal.
  • the labyrinth seal 1 5b provides for interlocking components that define a labyrinth, at least some of the interlocking components defining a labyrinth for letting moister ingress and egress between the permanent magnets 1 10 and the
  • the electromagnets 21 0 and the permanent magnets 1 10 may be vulnerable to corrosion .
  • neodymium permanent magnets 1 10 are extremely corrosion sensitive and will lose their magnetic capabilities when corroded.
  • Both the electromagnets and the permanent magnets are therefore coated with a hermetically sealing coating or even a double hermetically sealing coating , as is shown in figures 5a and 5b.
  • a powder coating is applied over the magnets, which is subsequently cured at the required temperature, especially by baking at a high temperature, to yield the hermetically sealing coating over the magnets.
  • a powder coating can be applied , for instance, using electrostatic means.
  • Such a coating is extremely shock proof and can withstand high temperatures.
  • An example is a coating of electrostatically applied zinc.
  • the coating may further be applied on various parts, such as the windings, cables and the protecting material necessary to ensure electrical insulation of the electrical motor.
  • the coating may generally be applied is a state of sub-assembling of the rotor and sub-assembling of the
  • the rotating part and rotor 1 00 has a substantially cylindrical shape with a diameter D and an axis A.
  • the rotating part and rotor further have an axle hub 122 that is configured to mate with the shaft 1 30 in the form of a spline axle in a form fixed connection.
  • Rim 120, front plate 121 and axle hub 122 are molded as one piece of material in the embodiment shown .
  • the axle hub has a length L1 that is in the range of 30% to 75% of the length of the spline axle 1 30.
  • At a first end the cylindrical shape is closed off by a front plate 121 as an extension of the rim 120 through which the substantially cylindrical rim is connected to the shaft or spline axle 1 30.
  • Openings may be present in the front plate 121 that is part of the rotor or rotating part 100, so as to further allow for ingress and egress from the environment.
  • a back plate 220 is provided, leaving an open connection between rotor 100 and back plate 220 as described earlier.
  • the back plate is part of the static part or stator 200.
  • a bearing is not provided and thus absent at the second end of the cylindrically shaped rotor between the rotor and stator, especially the back plate of the stator.
  • An air gap in the range of 1 mm to 5 m m , especially 1 .6 mm to 3 mm is present between the permanent magnets 1 10 of the rotor 1 00 and electromagnets 21 0 of the stator 200.
  • the stator is mechanically configured such that any mechanical impact acting on the wheel during driving incidentally and locally may reduce the air gap to a value in the range of 0.1 m m to 3 mm, especially 0.5 mm to 1 mm in the absence of a bearing at the second end of the rotor between the rotor and the stator.
  • the stator is configured such that the wheel is capable of bearing a weight up to 6,000 kilograms.
  • An additional bearing 16, as shown in figure 6 may be provided at the second end of the cylindrically shaped rotor between the rotor and stator, especially the back plate of the stator.
  • a wheel provided with such an additional bearing is capable of bearing a weight up to 12,000 kilograms.
  • FIGS. 1 and 6 show that the rim has two rim flanges 123, 124 on either side of the tire 1 1 .
  • Rim flange 123 at the second side of the rotating part 100 is a fixed rim flange that is an integral part of the rim 120. The second side of the rotor 100 will in use be turned towards the vehicle on which the wheel is mounted.
  • Rim flange 124 at the first side of the rotating part 100 is a separated part that can be mounted onto and demounted from the rim 120.
  • the demountable rim flange 124 is taken off. Subsequently, the tire can be removed and a new tire mounted, after which the rim flange 124 is mounted onto the rim again.
  • the rim flange 124 comprises a wedge-shaped flange element 124.1 , a resilient
  • the resilient O-ring 124.2 is inserted into a groove 125.1 provided in rim 120, after which the wedge-shaped flange element 124.1 is slid onto the rim 120 over O-ring 124.2. Subsequently, the sliding circular element 124.3 is inserted in an opening of retainer groove 125.3 and slid into the retainer groove until a thicker part 124.3a of the circular element 124.3 locks into the opening of retainer groove 125.2.
  • the circular element 124.3 made from spring steel inserted into groove 125.3 retains the wedge-shaped flange element 124.1 in place. After mounting and inflation, the tire 1 1 presses against the wedge-shaped flange element 124.1 and circular element 124.3 to safely keep these elements in place.
  • the O-ring 124.2 acts as a seal in between flange element 124.1 and rim 120.
  • electronics 240 for driving and controlling the electric motor 12 is placed in an electronics compartment 230 of the static part 200.
  • the back plate 220 closes off the electronics compartment 230 such that the compartment is not exposed to water and dirt from the outside environment E.
  • Mounting holes 222 are provided in the back plate 220 to provide for a connection between the electronics compartment and the outside environment, and a filter 223 is mounted on or within each mounting hole 222.
  • the filter 223 comprises a membrane that is not permeable to liquid water, but is permeable to water vapor in a direction from the electronics compartment to the outside environment.
  • Such membrane filter is, for instance, available under the trade name GORE-TEX.
  • any water that may have entered the electronics compartment is thus allowed to escape from the electronics compartment 230, especially when the temperature and therefore pressure rises in the electronics compartment rises during operation.
  • the temperature of the electronics 240 will increase.
  • air without water vapor is allowed to enter the compartment 230 through the channel elements 222 with filters 223.
  • the hole 222 with filters 223 allow the electronics compartment 230 to "breath".

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

L'invention concerne une roue comprenant un moteur électrique logé dans la roue. Le moteur électrique comprend des aimants permanents et des électroaimants, les aimants permanents et les électroaimants étant placés dans des compartiments de la roue qui sont ouverts à l'entrée et la sortie des éléments de l'environnement, et étant revêtus d'un revêtement d'étanchéité hermétique. Les électro-aimants peuvent comprendre un noyau métallique et des enroulements d'un fil conducteur, et le noyau métallique peut comprendre des couches de métal ferreux. Le revêtement d'étanchéité hermétique peut être formé par application d'un revêtement en poudre et durcissement du revêtement en poudre. La roue peut en outre comprendre un système électronique placé dans un compartiment électronique qui est ouvert à l'air ambiant et isolé des intempéries et de la saleté.
PCT/NL2017/050032 2016-01-20 2017-01-19 Roue comportant un moteur électrique logé dans la roue WO2017126963A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2016126A NL2016126B1 (en) 2016-01-20 2016-01-20 Wheel comprising an in-wheel electric motor.
NL2016126 2016-01-20

Publications (1)

Publication Number Publication Date
WO2017126963A1 true WO2017126963A1 (fr) 2017-07-27

Family

ID=56236017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2017/050032 WO2017126963A1 (fr) 2016-01-20 2017-01-19 Roue comportant un moteur électrique logé dans la roue

Country Status (2)

Country Link
NL (1) NL2016126B1 (fr)
WO (1) WO2017126963A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3453664A1 (fr) 2017-09-08 2019-03-13 Otis Elevator Company Système et procédés de transfert d'ascenseur élévateur

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2087126A5 (fr) * 1970-05-05 1971-12-31 Brissonneau & Lotz
JPH10145988A (ja) * 1996-11-05 1998-05-29 Tanaka Seisakusho:Kk モータコアおよびその製造方法ならびにこのモータコアを備えたモータ
JP2001103686A (ja) * 1999-09-29 2001-04-13 Nippon Densan Corp モータ用ステータ
JP2004104928A (ja) * 2002-09-11 2004-04-02 Kokusan Denki Co Ltd 電動機
US20040079566A1 (en) * 2002-10-24 2004-04-29 General Electric Company Stator insulation protection system
GB2461168A (en) * 2008-06-26 2009-12-30 Zhongshan Broad Ocean Motor Co External rotor motor with encapsulated stator
DE102011082117A1 (de) * 2010-09-06 2012-04-26 Kabushiki Kaisha Toyota Jidoshokki Motorbetriebener Kompressor
EP2448090A1 (fr) * 2009-06-23 2012-05-02 Mitsubishi Electric Corporation Stator de générateur de courant alternatif pour véhicule et son procédé de fabrication
CN202405913U (zh) * 2011-11-29 2012-08-29 上海海光电机有限公司 设有防水结构的轮毂电机
WO2013025096A1 (fr) * 2011-08-12 2013-02-21 E-Traction Europe B.V. Moteur logé dans la roue comprenant un frein
US20130241334A1 (en) * 2012-03-13 2013-09-19 Robert Bosch Gmbh Permanent magnet, and electric machine comprising same, and a method for producing the electric machine
JP2013221579A (ja) * 2012-04-17 2013-10-28 Ntn Corp インホイールモータ駆動装置
DE102012212772A1 (de) * 2012-07-20 2014-01-23 Robert Bosch Gmbh Korrosionsgeschützter Rotor für eine elektrische Maschine
DE202014101320U1 (de) * 2014-03-21 2014-04-17 Robert Bosch Gmbh Elektrische Maschine zum motorischen Verstellen beweglicher Teile im Motorraum eines Kraftfahrzeugs
US20140339939A1 (en) * 2013-05-17 2014-11-20 Brose Fahrzeugteile GmbH & Co. KG Wuerzburg Electric motor

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2087126A5 (fr) * 1970-05-05 1971-12-31 Brissonneau & Lotz
JPH10145988A (ja) * 1996-11-05 1998-05-29 Tanaka Seisakusho:Kk モータコアおよびその製造方法ならびにこのモータコアを備えたモータ
JP2001103686A (ja) * 1999-09-29 2001-04-13 Nippon Densan Corp モータ用ステータ
JP2004104928A (ja) * 2002-09-11 2004-04-02 Kokusan Denki Co Ltd 電動機
US20040079566A1 (en) * 2002-10-24 2004-04-29 General Electric Company Stator insulation protection system
GB2461168A (en) * 2008-06-26 2009-12-30 Zhongshan Broad Ocean Motor Co External rotor motor with encapsulated stator
EP2448090A1 (fr) * 2009-06-23 2012-05-02 Mitsubishi Electric Corporation Stator de générateur de courant alternatif pour véhicule et son procédé de fabrication
DE102011082117A1 (de) * 2010-09-06 2012-04-26 Kabushiki Kaisha Toyota Jidoshokki Motorbetriebener Kompressor
WO2013025096A1 (fr) * 2011-08-12 2013-02-21 E-Traction Europe B.V. Moteur logé dans la roue comprenant un frein
CN202405913U (zh) * 2011-11-29 2012-08-29 上海海光电机有限公司 设有防水结构的轮毂电机
US20130241334A1 (en) * 2012-03-13 2013-09-19 Robert Bosch Gmbh Permanent magnet, and electric machine comprising same, and a method for producing the electric machine
JP2013221579A (ja) * 2012-04-17 2013-10-28 Ntn Corp インホイールモータ駆動装置
DE102012212772A1 (de) * 2012-07-20 2014-01-23 Robert Bosch Gmbh Korrosionsgeschützter Rotor für eine elektrische Maschine
US20140339939A1 (en) * 2013-05-17 2014-11-20 Brose Fahrzeugteile GmbH & Co. KG Wuerzburg Electric motor
DE202014101320U1 (de) * 2014-03-21 2014-04-17 Robert Bosch Gmbh Elektrische Maschine zum motorischen Verstellen beweglicher Teile im Motorraum eines Kraftfahrzeugs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3453664A1 (fr) 2017-09-08 2019-03-13 Otis Elevator Company Système et procédés de transfert d'ascenseur élévateur
US11027944B2 (en) 2017-09-08 2021-06-08 Otis Elevator Company Climbing elevator transfer system and methods
EP3453664B1 (fr) * 2017-09-08 2021-10-27 Otis Elevator Company Système et procédés de transfert d'ascenseur élévateur

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