Electric motor with connection arrangement and elevator system with electric motor

Abstract

The following description relates to an electric motor (1) for generating torque, comprising: a motor housing (2), and one or more motor components (4.1, 4.2) arranged in the motor housing (2) with several first conductors (9.1, ..., 9.4) connected thereto, wherein at least one first wall (2.1) of the motor housing (2) has at least one through-hole (5.1, 5.2), wherein at least one through-hole (6.1, ..., 6.6) is arranged in the at least one through-hole (5.1, 5.2) such that a first terminal (8.1) for connecting a first conductor (9.1, ..., 9.4) is located inside and a second terminal (8.2) conductively connected to the first terminal (8.1) for connecting a second conductor (10) is located outside the motor housing (2), and wherein each first conductor (9.1, ..., 9.4) is connected to a separate through-hole in a (5.1, 5.2) is connected to the through-terminal (6.1, ..., 6.6).The following explanations continue to refer to an elevator system (20) with such an electric motor (1) as a drive.

Description

Technical FieldThe following explanations relate to an electric motor for generating a torque, in particular for driving a car of a lift installation, the electric motor having a motor housing and one or more motor component / s arranged in the motor housing and having a plurality of first conductors connected thereto.Furthermore, the following explanations relate to an elevator installation with such an electric motor.Background ArtElectric motors are widely known from the prior art and are used for generating torque in a wide variety of devices. The use of electric motors as a drive for elevator cars in elevator installations is likewise known from the prior art. Elevator installations for the vertical and / or horizontal transport of persons and / or goods to be transported are an integral part of modern residential and commercial buildings. A typical elevator installation has an elevator shaft in which at least one elevator car is moved between landing positions by means of a drive via a support means.The applications of electric motors usually result in the requirements that electric motors must be of cost-effective and compact design. In particular, electric motors must be simple to assemble and connect even under limited installation space conditions.EP 2 033 922 B1 discloses an electric motor for an elevator drive having a plurality of connection terminals located in the interior, wherein a cable feedthrough for a cable having a plurality of conductors is provided in a wall of a motor housing.Description - Technical SolutionProceeding from this situation, it is an object of the present invention to propose an electric motor which is cost-effective and has a low installation space requirement.The present object is achieved by the features of the independent main claims. Advantageous embodiments are specified in the dependent claims. Insofar as technically possible, the teachings of the subclaims can be combined as desired with the teachings of the main and dependent claims.In particular, the object is accordingly achieved by an electric motor for generating a torque, having a motor housing and one or more motor component / s arranged in the motor housing and having a plurality of first conductors connected thereto, wherein at least one first wall of the motor housing has at least one pass-through, wherein at least one pass-through terminal is arranged in the at least one pass-through in such a way that a first terminal for connecting a first conductor is arranged inside and a second terminal, conductively connected to the first terminal, for connecting a second conductor is arranged outside the motor housing, and wherein each first conductor is connected to a separate pass-through terminal arranged in a pass-through.Advantageous aspects are explained below and preferred modified embodiments are described further below. Explanations, in particular regarding advantages and definitions of features, are basically descriptive and preferred, but non-limiting examples. Where an explanation is limiting, this is expressly mentioned.If ordinal numbers ("first", "second", etc.) are used, for example for designating a component, an element, a method step or a method action, these ordinal numbers are provided purely for differentiation in the designation and do not indicate dependencies or orders. That is to say, in particular, that, for example, a device does not have to have a "first component" in order to have a "second component". A device can also have a "first component" and a "third component", but without necessarily having a "second component". It is also possible to provide a plurality of units of the same ordinal number, that is to say, for example, a plurality of "first components".An electric motor is an electromechanical converter, i.e. an electric machine, and converts electrical power into mechanical power. In conventional electric motors, current-carrying conductor coils generate magnetic fields, the mutual attraction and repulsion forces of which are converted into motion. In the electric motor, there is a fixed stator and a rotor rotating in relation to it. Either one of them has permanent magnets and the other has electric coils, or both components have electric coils. Each current-carrying coil generates a magnetic field, the orientation of which is dependent on the current direction. By continuously switching the current direction or suitably reversing the polarity of the coils during the revolution, a continuous rotation of the rotating rotor is achieved.A motor component is in particular a stator, a rotor or a commutator, a disk with electrical connections to which the coils are connected and which polarity reversals the coils during a revolution. A motor component can also be a power converter, in particular a frequency converter. On the aforementioned components, a first conductor is provided, in particular, for providing a phase of an energy supply. A motor component is furthermore in particular a control device, in particular a control unit with a data processing device such as a microcontroller. A first conductor is provided on such a control device, for example, for transmitting a control signal or provides a phase of an energy supply.Motor housing is understood to mean the totality of covers, by which the motor components are each completely or partially surrounded and which separate the motor components from the environment. The motor housing is formed in particular by a plurality of walls which are connected to one another and / or to motor components. Furthermore, the motor components themselves can also form parts of the motor housing by way of outer surfaces. A passage is a recess penetrating the motor housing, which thus forms a clear connection between the outer space and the inner space of the motor housing.A conductor is a single electrically conductive device and is particularly different from a cable in that it forms part of the cable, a cable typically comprising a plurality of conductors. According to the present understanding, a conductor always provides only a single potential or signal and always has only one line direction at a time. In particular, a conductor is a wire or a stranded wire of a multi-conductor cable.A through terminal is an electronic component with a first connection for receiving an individual conductor and a second receptacle for receiving an individual conductor, wherein the through terminal forms a galvanically conductive connection between the two received conductors or between the two connections. Through terminals are known as standard components in particular in switchgear cabinet construction and in this respect mass-produced products. Accordingly, such through-terminals are correspondingly cost-effective. In particular, through-clamps from the switchgear cabinet construction are provided for clamping onto a so-called support rail by means of a clamping part, wherein support rails or the clamping devices have or engage standardized dimensions. Through-terminals are, however, also known as components without a reference to the switchgear cabinet construction and are available at low cost. A conductor is connected to a through terminal, for example, by inserting the conductor, wherein the insertion can already bring about a locking and contacting, or wherein a contacting and a contacting are established by an operating element.In the sense of the present disclosure, all features and aspects that are explained with reference to a single through-terminal can be transferred correspondingly to a plurality of through-terminals and in particular to all through-terminals. Aspects and features which can be explained with respect to a plurality of through-terminals, insofar as it is obvious from the context that it is expedient, are also understood with reference to a single through-terminal.The above solution to the object with an electric motor now comprises the teaching that the external connection of the electric motor to which supply and / or signal conductors are to be connected during assembly is formed by through-terminals arranged in a wall of the electric motor. In this way, the passage of the conductors through the motor housing is formed by a cost-effective component, and it is possible to dispense with otherwise complicated and cost-intensive feedthroughs through the motor housing, such as special plug or cable feedthroughs. Further, the motor components can be directly connected to the first terminals of the through terminals without providing a further division of conductors within the motor housing. The electric motor can be designed to be particularly compact in this way. In particular, a plurality of through-terminals can be positioned independently of one another on the first wall for a particularly compact arrangement. It is of course also possible for a plurality of feedthroughs to be formed on different walls of the motor housing, in each of which pass-through terminals are arranged in order to enable the shortest possible first conductors and thus a particularly compact electric motor. Furthermore, by selecting the through terminal, the connection pattern in the outer space can also be adapted to the mounting conditions, wherein in particular the direction from which the second conductors are connected during the mounting can be adapted or adapted relatively freely to the mounting conditions, in particular to the available surrounding installation space. Finally, it is possible to connect the second conductors to the electric motor without having to open the motor housing during assembly, so that the installation space required for the connection is also limited to this.As an alternative to features of the above-described or in a preferred embodiment of the above-described, it is provided that a carrier element is arranged orthogonally to the first wall in the at least one pass-through, wherein the pass-through clamp is held on the carrier element. The through-clip can be held securely in the passage by the carrier element, wherein a holding surface which is substantially enlarged compared to the wall thickness of the first wall is provided in particular for holding the through-clip. In particular, the carrier element is a component separate from the first wall, and it is provided that the carrier element and the through-clamp are arranged on the electric motor and connected to one another during the factory mounting of the electric motor before the first wall is mounted. It can also be provided that the through-terminal is first fastened to the carrier element and subsequently the through-terminal and the carrier element are arranged as a composite on the first wall.In a preferred embodiment of the immediately above-described embodiment, it is provided that the through-terminal is held on the carrier element in a form-fitting manner. The through-clamp can then be fastened to the carrier element in a particularly simple and in particular without tools. Particularly preferably, the carrier element is provided for the purpose that the through-clamp is first arranged on the carrier element and the form fit is then produced and / or secured by a first wall mounted in the following or by arranging the carrier element and the through-clamp on an already mounted first wall. For example, the carrier element and the through-clamp arranged thereon are inserted into the passage.As an alternative to features of the immediately above-described or in a preferred embodiment of the immediately above-described, it is provided that the carrier element is formed with a geometry corresponding to the cross section of a support rail and the through-clamp is clamped onto the carrier element. A support rail-also called DIN rail or, in the case of a hat profile, hat rail-is a universal carrier made of a profile, for example of sheet metal or plastic, and is used in electrical engineering for fastening electrical operating means in junction boxes, switch cabinets, connection boxes and the like. On a support rail, different components, for example relays, current surge switches, time switches, automatic safety units or terminal blocks, can be pushed on laterally or pushed on from the front and locked in particular by clamping. The assembly of switch cabinets and switch boxes is facilitated by this standardized method. Various types of mounting rails are standardized in summary in the standard DIN EN 60715:2018-07 (dimensions of low-voltage switching devices-standardized mounting rails for the mechanical fastening of electrical devices in switching installations). Thus, it is particularly advantageous to use standard components as through-clamps, which have geometries corresponding to the cross section of a support rail and are particularly cost-effective as mass-produced products. Conversely, by forming the carrier element with the cross-sectional geometry of a carrier rail, the fastening geometry present in standard through-clamps is advantageously picked up and used for fastening the through-clamp.As an alternative to features of the directly described embodiment or in a preferred embodiment of the directly described embodiment, it is provided that a continuous carrier element is arranged orthogonally to the first wall in a plurality of apertures arranged on the first wall, wherein the through-terminals are each held on the carrier element. In an embodiment with multiple penetrations, the carrier element can then be handled in each case in a simplified manner compared to multiple carrier elements per penetration, and only a single mounting process is necessary. In particular, in embodiments in which the through-clamps are first fastened to the carrier element and only then is the first wall mounted or mounted on the first wall, the pre-mounting is advantageously particularly simple.As an alternative to features of the above-described or in a preferred embodiment of the above-described, it is provided that the second connection is oriented parallel to the first wall, so that a second conductor running parallel to the first wall can be connected to the second connection on a straight line. A conductor running parallel to the first wall thus runs straight on and in the second connection and has no bend and no bend. The connection of the second conductor is possible in this way in such a way that a connected second conductor occupies only very little installation space in the vicinity of the electric motor and that only little such installation space is required even for the connection of the second conductor. In particular in conjunction with the compact configuration of the electric motor itself described above, a particularly small overall installation space requirement is accordingly achieved.Furthermore, alternatively, it is provided in one embodiment that the through terminal has a plurality of, in particular two, second connections, wherein the plurality of second connections are oriented in different directions. The plurality of second connections are then galvanically conductively connected to the same first connection or the same first connections. In particular, a first second connection is oriented parallel to the first wall and a second second connection is oriented orthogonally to the first wall. The electric motor is then advantageously designed for alternative connection patterns or connection situations depending on the application.Independently of the second connection, the first connection can optionally be oriented parallel, obliquely or orthogonally to the first wall. In particular, the through terminal can be selected to the effect of how the connection of the first conductor to the through terminal within the motor housing per through terminal can be designed to be particularly simple and compact.In a preferred embodiment of the immediately above, it is provided that the at least one through-terminal has an operating element for opening and closing the second connection, wherein the operating element is formed to be accessible from a direction parallel to the first wall. An operating element is in particular a trigger of a terminal, such as a plastic clip, or an engagement of a screw, and serves to lock and securely contact a conductor connected to the second terminal by means of holding means or to securely contact and hold it with the conductive part of the through terminal. In this respect, a through terminal can be opened (for a short time) in particular by a tool such as a screwdriver in order to connect the second conductor. If the operating element is configured to be accessible from a direction parallel to the first wall, the tool can then thus be guided with its main extension parallel to the first wall. The installation space requirement to be provided for the connection of the electric machine is then kept particularly low.In a further embodiment, the second connections are designed such that the second conductors can be inserted easily, that is to say that opening takes place by the second conductors being inserted and the second conductors are also locked in the inserted state by the insertion. Advantageously, the second conductors can then be inserted in a particularly simple manner from the direction in which the second connections are aligned without tools. For this purpose, the second conductors can also be combined on a plug in order to make the connection particularly simple.As an alternative to features of the above-described or in a preferred embodiment of the above-described, it is provided that the first wall surrounds the at least one through-terminal in a bearing manner. The through-terminal is then held in a form-fitting manner in the passage, in particular by the first wall, and the first wall and the through-terminal form a substantially closed termination of the electric motor towards the outside. The final function of the motor housing is thus also maintained with the passage and the through-terminal arranged therein.As an alternative to features of the above-described or in a preferred embodiment of the above-described, it is provided that a sealing element is arranged between the first wall and the through-terminal in the at least one passage. The final function of the motor housing is thus also maintained with the passage and the through-clamp arranged therein, and the penetration of undesired substances such as foreign bodies, dirt, dust, liquid and the like at the passage is avoided.As an alternative to features of the above-described or in a preferred embodiment of the above-described, it is provided that at least one first conductor forms a phase of an energy supply of a motor component, at least one first conductor forms a protective conductor of an energy supply of a motor component and / or at least one first conductor is provided for conducting a control signal. These types of conductors represent the types of conductors that are usually to be passed through the motor housing to electric motors and connected outside. Particularly preferably, all conductors of the motor components present in the electric motor are led through walls of the motor housing by means of through-clamps according to the above-described.The object is furthermore achieved by an elevator installation, having: at least one elevator shaft, at least one elevator car which can be moved along the elevator shaft, and at least one drive which is designed as an electric motor according to the solution described above, wherein the elevator car can be driven by means of the drive via a carrying means.An elevator shaft is a continuous shaft which extends over a plurality of floors or along a plurality of regions of a building and has a cross section which is designed for the car to pass through. An elevator shaft of the elevator installation can extend in the vertical and / or horizontal direction, wherein electric motors are used for driving, in particular in elevator installations with vertical elevator shafts.A support means is in particular designed as a cable, belt, chain or the like and supports tensile loads in the direction of its longitudinal extent. Particularly preferably, the support means interacts with the drive via a drive pulley and is held, guided, drivable and optionally brakeable on the drive pulley with friction.The above solution of the object with an elevator installation now comprises the teaching that the drive is designed as an electric motor described above and the advantages described in this respect are accordingly transmitted to the elevator installation accordingly. The elevator installation is therefore in particular of cost-effective and compact design, or the installation space available in the elevator installation is used advantageously and in a manner which is easy to install.In a preferred embodiment of the immediately above, it is provided that the electric motor is arranged in a shaft head of the elevator shaft. A shaft head is understood to mean an end-side portion of an interior space of the shaft. In the case of a vertical elevator shaft, the shaft head is formed in particular by the upper end of the elevator shaft and lies opposite a shaft pit formed at a lower end, for example. By providing the drive in the shaft head, a separate machine space outside, in particular above, the elevator shaft can also be dispensed with and the elevator installation can be designed to be particularly compact. The building in which the elevator installation is arranged then in particular does not have to have a floor or a superstructure for a machine room above the uppermost floor that can be operated with the elevator installation. In other words, a building can be operated by the elevator installation advantageously up to its highest point, without a superstructure having to be provided on the building for this purpose. The advantages described above are particularly evident when arranging the drive in the shaft head, since the available installation space in a shaft head is usually particularly limited. Conversely, the compact construction of the electric motor enables precisely its arrangement in a shaft head.In a preferred embodiment of the immediately above, it is provided that the electric motor is arranged with the first wall opposite a shaft wall of the elevator shaft. Nevertheless, a connection of the second conductors to the through-terminal or to the through-terminals is then made possible if the second terminal or the second terminals is / are oriented parallel to the first wall. The electric motor can then advantageously be arranged in the shaft head and subsequently be connected easily and securely despite the small installation space available.Brief Description of the DrawingsA preferred technical solution is explained in more detail below with reference to the attached drawings on the basis of preferred exemplary embodiments. The phrase "figure" is abbreviated "Figure" in the drawings.In the drawings, FIG. 1 is a perspective view of an electric motor according to a solution of the object described above; FIG. 2 shows a side view of an open electric motor according to FIG. 1 with second conductors connected thereto; and FIG. 3 shows a schematic view of an elevator installation according to a solution of the object described above.Detailed Description of the DrawingsThe described exemplary embodiments are merely examples which can be modified and / or supplemented in a wide variety of ways within the scope of the claims. Each feature described for a particular embodiment may be used independently or in combination with other features in any other embodiment. Each feature described for an embodiment of a particular claim category may also be used in a corresponding manner in an embodiment of a different claim category.FIG. 1 shows an electric motor 1 with a motor housing 2, wherein a head-side first wall 2.1 of the motor housing 2, which is connected to the remaining motor housing 2 via screw connections 3, is shown transparently. A first motor component 4.1, which is designed as a rotor, and a second motor component 4.2, which is designed as a stator and which initially have first conductors for energy supply and / or control, which are not shown in more detail in FIG. 1, are arranged in the interior of the electric motor 1. The first wall 2.1 has a first passage 5.1 and a second passage 5.2, wherein four passage terminals 6.1, 6.2, 6.3, 6.4 are arranged in the first passage 5.1 and two passage terminals 6.5, 6.6 are arranged in the second passage. The first wall 2.1 abuts the through-terminals 6.1,..., 6.6 or the through-holes 5.1, 5.2 are completely filled by the through-terminals 6.1,..., 6.6, so that the motor housing 2 is substantially closed. Furthermore, but not shown in detail, further passages with passage clamps arranged therein can also be provided on other walls of the motor housing 2.FIG. 2 shows the electric motor 1 according to FIG. 1 in detail and cut away in the region around the through-clamps 6.1,..., 6.6. The through-connections 6.1,..., 6.6 are designed as standard connections for the switchbox construction and are each held on a carrier element 7 which is arranged orthogonally to the first wall 2.1 and has a geometry corresponding to the cross section of a carrier rail and a web 7.1, such that the carrier element 7 extends over both apertures 5.1, 5.2. The through-connections 6.1,..., 6.6 are clamped onto this carrier element 7 by means of clips, by means of which they can also be clamped onto carrier rails of a switch box. On the inside in the motor housing 2, the through terminals 6.1,..., 6.6 have first terminals 8.1, to each of which a first conductor 9.1, 9.2, 9.3, 9.4 is connected, in particular clamped. The first conductors 9.1,..., 9.4 are in particular assigned to an energy supply; the first conductor 9.1 is here a grounding conductor for grounding the first wall 2.1, while the conductors 9.2, 9.3, 9.4 are phases or protective conductors of the energy supply. On the outside of the motor housing 2, the through terminals 6.1,..., 6.6 have second terminals 8.2, to each of which a second conductor 10 is connected, in particular clamped. The second conductors 10 are combined in a cable 11 and therefore cannot be seen in more detail in FIG. 2. The second conductors 10 correspond to the first conductors 9.1,..., 9.4 to which they are respectively connected via the through terminals 6.1,..., 6.6 in their assignment.As is also shown in FIG. 2, the second connections 8.2 are arranged on the through-connections 6.1,..., 6.6 in such a way that they are aligned parallel to the first wall 2.1. The second conductors 10 of the cable 11 running parallel to the first wall 2.1 can thus be connected to the second connections 10 straight and the cable 11 does not have to have any kink or any bend for connection.FIG. 3 shows a lift installation 20, illustrated in simplified form, having a lift shaft 21 and a lift cage 22 which can be moved in the lift shaft 21, The lift cage 22 has a lift cage door 23, which can form a passage in the respective landing position with a plurality of landing doors 24.1, 24.2, 24.3, 24.4. The elevator car 22, shown in greatly simplified form, is held against a counterweight 27 by a support means 26 guided on deflecting means 25. The support means 26 can furthermore be driven by a drive pulley 28, wherein a drive torque necessary for this is provided by the electric motor 2 operatively connected to the drive pulley 28. The electric motor 2 is arranged in a shaft head 21.1 of the elevator shaft 21 and with the first wall 2.1 directly on a shaft wall 21.2.List of reference characters1 Electric motor 2 motor housing 2.1 first wall of the motor housing 3 screw connection 4.1 motor component (rotor) 4.2 motor component (stator) 5.1 first pass-through 5.2 second pass-through 6.1 pass-through terminal 6.2 pass-through terminal 6.3 pass-through terminal 6.4 pass-through terminal 6.5 pass-through terminal 6.6 pass-through terminal 7 carrier element 7.1 web of the carrier element 8.1 first connection 8.2 second connection 9.1 first conductor 9.2 first conductor 9.3 first conductor 9.4 first conductor 10 second conductor 11 cable 20 elevator installation 21 elevator shaft 21.1 shaft head of the elevator shaft 21.2 shaft wall of the elevator shaft 22 elevator car 23 elevator car door 24.1 landing door 24.2 landing door 24.3 landing door 24.4 landing door 25 deflection means 26 carrier means 27 counterweight 28 Drive discReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedEP 2 033 922 B1

[0005]

Claims

Electric motor (1) for generating a torque, comprising: a motor housing (2); and one or more motor component / s (4.1, 4.2) arranged in the motor housing (2) with a plurality of first conductors (9.1,..., 9.4) connected thereto; wherein at least one first wall (2.1) of the motor housing (2) has at least one passage (5.1, 5.2); wherein at least one passage terminal (6.1,..., 6.6) is arranged in the at least one passage (5.1, 5.2) such that a first connection (8.1) for connecting a first conductor (9.1,..., 9.4) is arranged inside and a second connection (8.2) conductively connected to the first connection (8.1) for connecting a second conductor (10) is arranged outside the motor housing (2); and wherein each first conductor (9.1,..., 9.4) is connected to a separate through terminal (6.1,..., 6.6) arranged in a feedthrough (5.1, 5.2).Electric motor (1) according to Claim 1, wherein a carrier element (7) is arranged orthogonally to the first wall (2.1) in the at least one pass-through (5.1, 5.2), wherein the pass-through clamp (6.1,..., 6.6) is held on the carrier element (7).Electric motor (1) according to Claim 2, wherein the through-clamp (6.1,..., 6.6) is held on the carrier element (7) in a form-fitting manner.Electric motor (1) according to Claim 2 or 3, wherein the carrier element (7) is formed with a geometry corresponding to the cross section of a carrier rail and the through-clamp (6.1,..., 6.6) is clamped on the carrier element (7).Electric motor (1) according to one of Claims 2 to 4, wherein a continuous carrier element (7) is arranged orthogonally to the first wall (2.1) in a plurality of passages (5.1, 5.2) arranged on the first wall (2.1), wherein the passage clamps (6.1,..., 6.6) are each held on the carrier element (7).Electric motor (1) according to one of the preceding claims, wherein the second connection (8.2) is oriented parallel to the first wall (2.1), so that a second conductor (10) running parallel to the first wall (2.1) can be connected to the second connection (8.2) on a straight path.Electric motor (1) according to claim 6, wherein the at least one through-terminal (6.1,..., 6.6) has an operating element for opening and closing the second connection (8.2), wherein the operating element is formed to be accessible from a direction parallel to the first wall (2.1).Electric motor (1) according to one of the preceding claims, wherein the first wall (2.1) surrounds the at least one through-terminal (6.1,..., 6.6) in an abutting manner.Electric motor (1) according to one of the preceding claims, wherein a sealing element is arranged between the first wall (2.1) and the through-terminal (6.1,..., 6.6) in the at least one pass-through (5.1, 5.2).Electric motor (1) according to one of the preceding claims, wherein at least one first conductor (9.1,..., 9.4) forms a phase of an energy supply of a motor component (4.1, 4.2), at least one first conductor (9.1,..., 9.4) forms a protective conductor of an energy supply of a motor component (4.1, 4.2) and / or at least one first conductor (9.1,..., 9.4) is provided for conducting a control signal.Lift installation (20), comprising: at least one lift shaft (21); at least one lift cage (22) which can be moved along the lift shaft (21); and at least one drive designed as an electric motor (1) according to one of the preceding claims; wherein the lift cage (22) can be driven by means of the drive via a carrying means (26).Lift installation (20) according to claim 11, wherein the electric motor (1) is arranged in a shaft head (21.1) of the lift shaft (21).Lift installation (20) according to claim 12, wherein the electric motor (1) is arranged with the first wall (2.1) opposite a shaft wall (21.2) of the lift shaft (21), wherein the drive is configured as an electric motor (1) according to one of claims 6 or 7.

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