Load-bearing capacity retainer and drive device with such a

Abstract

The following description relates to a belt retainer (13) for securing a belt support (4) resting on a drive shaft (7) in a drive device (6) of an elevator system (1) against lifting off, comprising a profile (14) that is rounded at least on one inner side (14.1) for partially engaging the drive shaft (7) in the area of ​​at least one drive zone (7.3) with a radial distance between the drive shaft (7) and the inner side (14.1) of the profile (14) for the belt support (4) to pass through, and at least two mounting brackets (16.1, 16.2) each for fastening to a housing (11) of the drive device (6) on the one hand and to the profile (14) on the other, wherein the profile (14) has at least two grooves (15.1, 15.2) extending in its axial direction (AX) on an outer side (14.2) for positionally variable fastening of the mounting brackets (16.1, 15.2). 16.2) by means of the grooves (15.1, 15.2) engaging fastening means (17). The following descriptions further relate to a drive device (6) with a load-bearing capacity retainer (13), as well as a lift system (1) and a method (30).

Description

Technical field

[0001] The following descriptions relate to a belt retainer for securing a belt support element resting on a drive zone of a drive shaft in a drive device of an elevator system against lifting off the drive zone, comprising a profile that is rounded at least on one inside side for partially gripping the drive shaft in the area of ​​at least one drive zone with a radial distance between the drive shaft and the inside of the profile provided for the belt support element to pass through.

[0002] Furthermore, the following descriptions relate to a drive device for a belt support element of an elevator system, comprising a first mounting plate for receiving a motor, a motor arranged on the first mounting plate, a drive shaft received on the motor with at least one drive zone for receiving a belt support element, a second mounting plate opposite the first mounting plate, in particular for receiving a brake acting on the drive shaft, at least two stiffening struts extending between the mounting plates parallel to the drive shaft and a aforementioned support element retainer.

[0003] Furthermore, the following descriptions relate to an elevator system comprising an elevator shaft extending in a vertical direction, at least one car movable in the elevator shaft, at least one drive device as described above arranged at an upper end of the elevator shaft, and at least one belt support element running between the drive device and the car and received on a drive zone of the drive shaft.

[0004] Furthermore, the following explanations concern a procedure for installing a load-bearing capacity hold-down device. Technical background

[0005] Elevator systems for transporting people and / or goods are an integral part of modern residential and commercial buildings. A typical elevator system comprises one or more elevator shafts, in each of which one or more cars travel between landing positions by means of drive devices, such as suspension drives.

[0006] In such elevator systems, it is already known to use belts as the load-bearing element. These belts, due to their high coefficients of friction and tight possible bending radii, can be driven by drive units with particularly small diameters. A drive sheave with a large diameter, as is common with rope-based systems, can be dispensed with, allowing the drive unit to be designed to be particularly compact—in particular, compact enough to be installed in the head of the elevator shaft in a machine-room-less elevator system.

[0007] Such drive devices are typically constructed with a housing consisting of mounting plates and stiffening struts. A motor is arranged on one side of the mounting plates, and optionally a brake on the other. A drive shaft, driven by the motor, runs between the mounting plates, and the belt is frictionally engaged with a drive zone in this area. The stiffening struts run radially spaced and parallel to the drive shaft. The belt surrounds the drive shaft, for example, by 180°, with the angle of this surround being determined by the positional relationship between the drive device, the car, and the counterweight.

[0008] In such drive devices, it is also known to provide belt tensioners that form an outer, radially spaced sleeve in the area of ​​the circumferential section of the drive shaft / drive zone where the belt tensioner rests against it. A circumferentially extending gap is then formed between the belt tensioner and the drive shaft / drive zone, through which the belt tensioner runs without touching the tensioner when it is in proper contact with the drive zone. The belt tensioner prevents the belt tensioner from lifting radially from the drive zone and thus eliminates the risk of power transmission loss and / or the belt tensioner jumping off the drive zone. The belt tensioner also facilitates the easier placement of the belt tensioner onto the drive zone.However, a disadvantage of known housings is the severely limited installation space around the drive shaft / drive zone. This necessitates compromises between a cost-effective housing design, the geometry / arrangement of the load-bearing clamp, and simple and reliable assembly of the drive unit. Furthermore, housings manufactured as cast parts have the disadvantage that the load-bearing clamps must be extensively adapted to each individual housing due to the relatively high tolerances and the geometries required for molding.

[0009] For example, US Patent 6,601,828 B2 discloses a drive device for an elevator system of the type described above, in which a suspension conduit retainer is applied from above to two lateral stiffening struts and fastened there. A disadvantage of this drive device is that the drive shaft is only accessible to a very limited extent, for example, for placing the suspension conduit or for maintenance.

[0010] WO 2016 / 092592 A1 also discloses a load-bearing device hold-down device for a lift system with rope load-bearing device and traction sheave.

[0011] Based on this situation, the present task is to improve the design of a drive device with regard to the load-bearing capacity retainer, in particular so that the retainer is easy to install on the drive device and / or the drive shaft is easily accessible when the drive device is assembled. Description - Technical Solution

[0012] The present problem is solved by the features of the independent claims. Advantageous embodiments are specified in the dependent claims, the description, and the drawings. Where technically feasible, the teachings of the dependent claims can be combined arbitrarily with those of the main and dependent claims.

[0013] In particular, the problem is solved by a belt retainer for securing a belt support element resting on a drive zone of a drive shaft in a drive device of an elevator system against lifting off the drive zone, comprising a profile that is rounded at least on one inside for partially gripping the drive shaft in the area of ​​at least one drive zone with a radial distance between the drive shaft and the inside of the profile provided for the belt support element to pass through, and at least two mounting brackets each for attaching to a housing of the drive device on the one hand and to the profile on the other, wherein the profile has at least two grooves extending in its axial direction on one outside for positionally variable attachment of the mounting brackets by means of fastening means engaging in the grooves.

[0014] The following sections explain advantageous aspects and subsequently describe preferred modified embodiments. Explanations, particularly regarding advantages and definitions of features, are descriptive and preferred, but not limiting. If an explanation is limiting, this will be explicitly stated.

[0015] According to the present understanding, an elevator system is designed, for example, with at least one vertical elevator shaft and at least one car, but can also have several parallel elevator shafts and / or several cars, in particular several cars in one elevator shaft. A car is held on a first side of a drive device by a belt drive and driven via the belt drive, the drive device transmitting the drive torque to the belt drive via the drive shaft. The belt drive is preferably connected on a second side of the drive device to a counterweight associated with the car. A drive device is arranged, for example, in a machine room above the elevator shaft(s) or preferably in an upper section of an elevator shaft, the so-called shaft head. The drive device or belt drive is located on the drive device.The load-bearing element(s) is / are designed as a belt load-bearing element, i.e., with a flat cross-section and a flat or contoured force transmission surface, and carries / carry tensile loads in the direction of its / their longitudinal extent. Such belt load-bearing elements are also referred to as load-bearing belts and comprise, for example, several steel cables arranged side by side, enclosed in a common sheath, such as one made of rubber or plastic. Multiple belt load-bearing elements can be provided in the elevator system, for example, to increase the load-bearing capacity or for redundancy. An elevator shaft is a continuous shaft that extends over several floors of a building and has a cross-section designed for the passage of the elevator car.

[0016] Insofar as reference is made to a cylindrical coordinate system with a radial direction, a circumferential direction, and an axial direction, this coordinate system refers to the drive shaft of the drive device, whose axis of rotation forms the reference axis of the coordinate system. The coordinate system is transferred to the other components of the drive device according to their arrangement with respect to the drive shaft. Insofar as the load-bearing clamp is described using this coordinate system, the directional specifications refer to a hypothetical or actual installation position of the load-bearing clamp on the drive device.

[0017] A drive zone is a substantially cylindrical surface formed on the drive shaft or an element mounted on it, which is enclosed by the belt in a force-transmitting manner. Insofar as the belt partially encircles the drive shaft, it bears against the drive zone over at least an angular segment of the circumference of the drive shaft or the drive zone, for example, between 90° and 210°. "Encirclement" here is not understood as a complete enclosure of the drive shaft over its entire circumference, but merely as the belt bearing against the drive zone over at least a segment of the drive shaft's circumference. The at least one drive zone is, for example, slightly convex to center the belt running upon it. Furthermore, collars may be attached to the drive shaft or drive zone to define the axial boundaries of the at least one drive zone.The element held on it must be designed to prevent axial slippage of the belt support from the drive zone. When the drive shaft is driven by the motor (or braked by a brake), the rotational movement of the drive shaft is translated into a translational movement of the belt support by the static friction of the belt support against it. Specifically, a drive zone is arranged on the drive shaft for each belt support of the associated elevator car.

[0018] A belt retainer, as defined in this disclosure, is a component with a rounded side facing the drive shaft. It serves to enclose the drive zone at a slight radial distance and to prevent the belt from moving radially away from the drive zone. The curvature of the belt retainer corresponds in particular to the curvature of the drive shaft or drive zone, albeit with a slightly larger radius. On an outer side, i.e., a side facing away from the drive zone, the belt retainer may have a partially or completely different geometry and, in particular, includes means and devices for fastening it to the housing. A belt retainer also secondarily serves to protect the drive shaft or at least one drive zone against the ingress of foreign objects, contaminants, and / or liquids, and to assist in placing the belt onto the drive zone.A profile is understood as a body with a constant basic cross-section in the axial direction.

[0019] In a drive mechanism, a housing serves to hold the individual components together and in relation to the elevator shaft, and to transmit power between the components and to the elevator shaft. Furthermore, the housing can serve to protect individual components, for example, by at least partially enclosing them. This protection then exists, for instance, at least partially against the ingress of objects or liquids into the drive zone(s). However, according to the present understanding, the housing does not necessarily form a complete enclosure or housing of the components, and in particular, not a complete enclosure or housing of all components.

[0020] The solution to the problem with the aforementioned load-bearing clamp comprises the teaching that grooves are arranged on the outside of the profile, by means of which a positionally variable arrangement of the load-bearing clamp on the housing is made possible. Mounting brackets can then be provided, which are attached to the housing at a suitable position and to the profile at a resulting position along the groove. Furthermore, the mounting brackets and the profile can be inserted onto the housing separately from each other or in an installation arrangement that does not correspond to the final arrangement and are only connected to each other after the profile is finally positioned on the housing. In this way, it is advantageously achieved that positioning of the profile in the confined interior area of ​​the housing, i.e., the area between the mounting plates and within the stiffening struts, is simplified.The profile is positioned primarily by tilting it inwards along its circumference. Specifically, the mounting brackets can be arranged in a pre-assembled configuration, projecting radially outwards from the outside of the profile, for optimal positioning on the housing. This arrangement can be made after and / or independently of the profile's positioning. This eliminates the disruptive influence of radially protruding elements when inserting the profile into the housing's interior. Furthermore, the grooves can be advantageously positioned on the profile depending on the housing design. The design also allows the stiffening struts to be flexibly arranged on the housing, ensuring good accessibility to the drive shaft even with the load-bearing capacity retainer installed.

[0021] Alternatively or additionally, the two grooves can be designed so that they are open in directions aligned with each other and opposite to each other, allowing fasteners to be inserted into the grooves from different sides while remaining aligned with each other. Such an arrangement can be advantageous if the load-bearing element retainer is to be positioned directly below a stiffening strut on the housing, in which case the fasteners are accessible laterally below the stiffening strut.

[0022] In particular, it can be provided that two aligned fasteners form a pivot axis for the associated mounting bracket, allowing the mounting bracket to be folded onto the outside of the profile. The mounting bracket can then be loosely secured to the grooves with fasteners even before the load-bearing retainer is inserted into the housing. Loose securing means that the mounting bracket is already held securely against loss by the fasteners on the profile or the grooves, but relative movement between the mounting bracket and the profile is possible, in particular rotation of the mounting bracket around the fastener and / or movement of the mounting bracket in an axial direction along the profile.For example, when using a screw as a fastener, the screw can be partially tightened to achieve a secure connection between the mounting bracket and the profile, without the screw being fully tightened to create a force-fit. By incorporating a pivot axis that allows the mounting bracket to be folded onto the profile, it is advantageously achieved that the bracket can remain folded against the profile while the profile is being inserted into the housing. This prevents the bracket from protruding radially from the profile, thus ensuring the load-bearing clamp remains sufficiently compact for insertion. After insertion, the mounting bracket is then unfolded or stood upright, allowing it to assume a position where insertion of the load-bearing clamp would otherwise have been impossible.Furthermore, the mounting brackets can be positioned axially at any point along the groove during the insertion of the load-bearing clamp and then slid into their intended position after insertion. This allows for particularly flexible and convenient positioning of the mounting bracket. Additionally, a rotatable mounting bracket allows for a slightly tilted position relative to the mounting plates, for example, to conform to a chamfer or a surface of a mounting plate that is not perfectly perpendicular due to tolerances.

[0023] Alternatively or additionally, the grooves can be designed to open parallel to each other in the same direction, allowing fasteners to be inserted into the grooves from the same direction. This allows, for example, the fastening in both grooves from that direction if the load-bearing retainer or profile is positioned on the housing where only one side is accessible. Such a situation might arise, for instance, if several stiffening struts are distributed around the circumference of the drive shaft.

[0024] Alternatively or additionally, the profile for gripping the drive shaft can be designed to extend around half its circumference. The wrap angle of the belt support element at the drive zone is then correspondingly at least 180°. Such an arrangement corresponds, for example, to an arrangement of the drive device such that the belt support element runs from the drive device perpendicular to the car and perpendicular to the counterweight. Advantageously, the belt support element is then held down and protected particularly securely.

[0025] Alternatively or additionally, the profile can be designed to be split into two halves along the axial direction, with each half having a groove. The halves can then be inserted around the drive shaft in a particularly simple manner, even in very confined spaces, and are designed, for example, to be connected to each other by the mounting brackets and / or other fasteners. A connection is made only when both halves have assumed their intended position on the drive device. Specifically, it can be provided that the mounting brackets are first positioned and fastened to the housing, and then the halves are slid or tilted under the mounting brackets and fastened to them.

[0026] Alternatively or additionally, the grooves can be designed to accommodate T-nuts, in particular T-nuts with a thread for receiving a screw. The fasteners can then be easily attached to the grooves, creating a secure, force-fit connection.

[0027] The problem is further solved by a drive device for a belt support element of an elevator system, comprising a first mounting plate for receiving a motor, a motor arranged on the first mounting plate, a drive shaft received on the motor with at least one drive zone for receiving a belt support element, a second mounting plate opposite the first mounting plate, in particular for receiving a brake acting on the drive shaft, and at least two stiffening struts extending between the mounting plates parallel to the drive shaft, wherein the drive shaft extends through the mounting plates and the at least one drive zone is arranged between the mounting plates, and wherein a belt support element retainer as described above is held by the mounting brackets on the two mounting plates, and the drive shaft partially surrounds at least a region of the at least one drive zone.

[0028] Where ordinal numbers, such as "first," "second," etc., are used, for example to designate a component, an element, a process step, or a process action, these ordinal numbers are solely for differentiation in the designation and do not indicate any dependencies or sequences. This means, in particular, that a device does not need to have a "first component" to have a "second component." A device can also have a "first component" and a "third component" without necessarily having a "second component." Multiple units with the same ordinal number are also possible, for example, multiple "first components."

[0029] A mounting plate, for example, is designed as a flat and / or cubic body and features, in particular, fastening devices such as bores or recesses and / or projections for attaching the motor or brake – the motor or brake is thus connected to the mounting plate or, via the mounting plate, to the drive device. Furthermore, each mounting plate has, in particular, a through-hole for the drive shaft and, when the drive device is assembled, completely surrounds the drive shaft.

[0030] A stiffening strut is, for example, rod-shaped or flat and arranged between the mounting plates in such a way that the belt support elements in contact with the drive zones pass over the stiffening struts without contact during operation of the elevator system. The mounting plates are dimensioned and designed accordingly so that the stiffening struts arranged on them lie outside the guide planes of the belt support element(s). The stiffening struts are designed to surround the drive shaft, i.e., they are arranged in the circumferential region of the drive shaft and radially spaced from it. The stiffening struts preferably have a torsionally rigid cross-section, in particular a torsionally rigid profile cross-section.

[0031] The drive unit achieves the advantages previously described for the load-bearing clamp in a corresponding manner. In particular, it allows for simple and flexible positioning of the load-bearing clamp, even in very confined spaces within the housing. The profile and mounting brackets can be easily inserted onto the housing, either separately or together in a single installation arrangement, for example, by folding the profile in. The housing design is then not significantly restricted by the need to include a load-bearing clamp, especially regarding the positioning of stiffening struts. Furthermore, good accessibility to the drive shaft can be achieved with the drive unit fully assembled.

[0032] Alternatively or additionally, the load-bearing clamp can be arranged directly below a stiffening strut. This means the load-bearing clamp is positioned radially inside the stiffening strut. The number of additional stiffening struts located outside the circumferential area covered by the load-bearing clamp can then be kept to a minimum, resulting in particularly high accessibility to the drive shaft. Specifically, only one additional stiffening strut is provided on the housing besides the one covering the load-bearing clamp. The aforementioned design makes it easy to arrange the load-bearing clamp radially below the stiffening strut in order to achieve these advantages.

[0033] Alternatively or additionally, the mounting plates and stiffening struts can be formed as a single casting. The advantages described above regarding the load-bearing capacity retainer can then be achieved to a particularly high degree, since the casting-specific tolerances and draft angles can be easily accommodated when positioning the mounting brackets on the housing, thanks to the flexible arrangement of the brackets.

[0034] The problem is further solved by an elevator system comprising an elevator shaft extending vertically, at least one car movable in the elevator shaft, at least one drive device arranged at an upper end of the elevator shaft as described above, and at least one belt support element running between the drive device and the car and mounted on a drive zone of the drive shaft. The advantages described above with respect to the belt support element retainer and the drive device are achieved accordingly with this elevator system.

[0035] The problem is further solved by a method for installing a load-bearing clamp, in which two aligned fasteners form an axis of rotation of the associated mounting bracket, on a drive device in which the load-bearing clamp is arranged directly below a stiffening strut. The method comprises the following steps: loosely securing the mounting brackets to the grooves with fasteners, the fasteners forming an axis of rotation of the respective mounting bracket; folding the mounting brackets towards the outside of the profile; tilting the load-bearing clamp over the drive shaft and under the stiffening strut; erecting the mounting brackets; fastening the mounting brackets to the mounting plates with fasteners; and securing all fasteners.

[0036] It is preferred that the sequence of process steps can be varied, unless a specific sequence is technically required. However, the aforementioned sequence of process steps is particularly preferred.

[0037] In this process, the mounting brackets are first folded onto the profile so that the load-bearing clamp is sufficiently compact and without radially protruding elements to be tilted into the confined space between the stiffening strut and the drive shaft. Only then are the mounting brackets positioned to finally secure the mounting brackets and the entire load-bearing clamp. The advantages already described for the load-bearing clamp, the drive unit, and the elevator system are thus achieved with this method. Brief description of the drawings

[0038] A preferred technical solution is explained in more detail below with reference to the accompanying drawings and preferred embodiments. The term "figure" is abbreviated as "Fig." in the drawings.

[0039] The drawings show Fig. 1 a schematic view of an elevator system according to an embodiment of the present disclosure; Fig. 2 a schematic sectional view of a drive device for an elevator system according to Fig. 1; Fig. 3a a perspective view of a drive device in an embodiment according to the present disclosure without a representation of a motor and a brake; Fig. 3b a perspective view of a load-bearing capacity hold-down device as used in the drive device according to Fig. 3a is provided for; Fig. 3c a cross-sectional view of the drive device according to Fig. 3a during the insertion of the load-bearing capacity retainer between the drive shaft and a stiffening strut; Fig. 4 a perspective view of a load-bearing capacity hold-down device in a further embodiment according to the present disclosure; and Fig. 5 a diagram of a preferred method. Detailed description of the drawings

[0040] The described embodiments are merely examples that can be modified and / or supplemented in various ways within the scope of the claims. Each feature described for a particular embodiment can be used independently or in combination with other features in any other embodiment. Each feature described for an embodiment of a particular claim category can also be used accordingly in an embodiment of a different claim category.

[0041] Fig. Figure 1 shows an elevator system 1 with a vertically extending elevator shaft 2 and a car 3 moving within the elevator shaft 2. The car 3 is suspended by belts 4, which are guided over several deflection elements 5 and a drive shaft 7 of a drive unit 6. The drive unit 6 is located in a shaft head 2.1 of the elevator shaft 2 and is attached to the ceiling of the elevator shaft 2 in a manner not shown in detail. A counterweight 8 is also suspended from the belts 4 and moves in the opposite direction to the car 3 within the elevator shaft 2. The belts 4 run perpendicularly between the drive unit 6 and the car 3, and between the drive unit 6 and the counterweight 8, resulting in a wrap angle of 180° at the drive shaft 7.

[0042] Fig. Figure 2 shows the drive device 6 in detail in a cross-sectional view, initially without the load-bearing capacity retainer described below. The drive shaft 7 has a first end 7.1 by means of which the drive shaft 7 is connected to a motor 9 in a torque-resistant manner or can be connected to a motor 9 in a torque-resistant manner by means of a coupling (not shown). The motor 9 is preferably designed as an electric machine. The drive shaft 7 also has a second end 7.2 by means of which the drive shaft 7 is connected to a brake 10 in a torque-resistant manner. In alternative embodiments, the drive device 6 can also be designed without the brake 10. Between the motor 9 and the brake 10, several drive zones 7.3 are formed on the drive shaft 7, three of which are connected in Fig. 2. Belt support elements 4 of the car 3 (not shown) are or can be received, held and / or driven or braked. The embodiment according to [reference to embodiment] is purely exemplary. Fig. 2. Three drive zones 7.3 for three parallel and mutually redundant belt support elements 4 are formed on the drive shaft 7, wherein the length of the drive shaft 7 in an axial direction AX is determined by the number of drive zones 7.3. The number of belt support elements 4 required and to be accommodated on the drive shaft 7 is determined, for example, by the permissible maximum weight of the car 3 and the load-bearing capacity of a single belt support element 4 and / or by required redundancies. Accordingly, the drive shaft 7 can also be designed with more or fewer than three drive zones 7.3.

[0043] The drive device 6 further comprises a housing 11 with a first mounting plate 11.1 for receiving the motor 9, a second mounting plate 11.2 for receiving the brake 10, and at least two stiffening struts 11.3 extending between the first mounting plate 11.1 and the second mounting plate 11.2 in the axial direction AX. The mounting plates 11.1 and 11.2 are preferably designed as cast parts. The stiffening struts 11.3 surround the drive shaft 7 and extend parallel to it in the axial direction AX. The axial direction AX corresponds to the axial extent of the drive shaft 7. The housing 11 serves to accommodate all other components of the drive device 6, i.e., the motor 9, the brake 10, and the drive shaft 7, and is connected to the ceiling of the elevator shaft 2 in a manner not shown in detail, for example, by screw connections of the first connection element 11.1 and the second connection element 11.2 and / or at least one stiffening strut 11.3 with the ceiling.

[0044] The Fig. Figures 3a to 3c show a possible embodiment of a drive device 6 with a belt tensioner 13 arranged thereon, or the belt tensioner 13 in detail. The motor 9 and the brake 10 are omitted for clarity. The belt tensioner 13 is formed from a profile 14, which is rounded on an inner surface 14.1. The radius of this rounding is slightly larger than the outer radius of the drive shaft 7 or the drive zones 7.3, so that a radial gap is formed between the drive shaft 7 and the belt tensioner 13 at the drive zones 7.3, through which the belt tensioners 4 pass. On an outer surface 14.2 of the profile 14, grooves 15.1, 15.2 extending in the axial direction AX are arranged, which are open in directions pointing away from each other and are therefore opposite each other. Mounting brackets 16.1 and 16.2 are located at the grooves 15.1 and 15.2.2 arranged by means of fasteners 17 designed here as screws. The mounting brackets 16.1, 16.2 serve to fasten the load-bearing clamp 13 to the mounting plates 11.1, 11.2, as shown in . Fig. 3a shown.

[0045] Due to the alignment of the grooves 15.1, 15.2, the two fastening elements 17 of a mounting bracket 16.1, 16.2 form an axis of rotation D (in Fig. 3b) together. By initially loosely securing the mounting brackets 16.1, 16.2 to the grooves 15.1, 15.2 – the fasteners 17 are not yet fully tightened – the mounting brackets 16.1, 16.2 can then be attached as shown in Fig. As shown in Figure 3c, the load-bearing clamp 13 can be folded onto profile 14. This allows the load-bearing clamp 13 to be tilted into the confined space 19 between the drive shaft 7 and the housing 11 or the stiffening struts 11.3. In particular, the load-bearing clamp 13 can be folded as shown in the detail of Figure 3c. Fig. 3c shows the upper stiffening strut 11.3 passing through, which is accompanied by an arrangement of the mounting brackets projecting in the radial direction R (in Fig. 3b) would not be possible. Fig. Figure 3c shows the arrangement when the load-bearing clamp 13 is tilted in, in which the mounting bracket 16.2 just passes the upper stiffening strut 11.3. The mounting brackets 16.1, 16.2 can also be positioned arbitrarily in the axial direction AX for tilting the load-bearing clamp 13 into the interior 19.

[0046] Fig. Figure 4 shows another possible embodiment of a load-bearing capacity hold-down device 13, which is used with a drive device 6 as in Fig. Figure 3a shows how it can be used. In contrast to the previously described load-bearing clamp 13, here the grooves 15.1, 15.2 are open in the same or parallel direction, so that access to the load-bearing clamp 13 in the final position on the drive device 6 is only required from one upper side. The profile 14 is further divided into two halves 20.1, 20.2, with each half 20.1, 20.2 having one of the grooves 15.1, 15.2. The mounting brackets 16.1, 16.2 can then first be arranged on a drive device 6, and subsequently the halves 20.1, 20.2 can be slid laterally under the mounting brackets 16.1, 16.2 and connected to them by means of the fasteners 17. The halves 20.1, 20.2 are further connected to each other by a connecting plate 22, which also engages the grooves 15.1, 15.2 via further fastening means 23.

[0047] Fig. Figure 5 shows a flow diagram of a method 30 for installing a load-bearing clamp 13, in which two aligned fasteners 17 form a rotation axis D of the associated mounting bracket 16.1, 16.2, in a drive device 6 in which the load-bearing clamp 13 is arranged directly below a stiffening strut 11.3. This corresponds, for example, to the drive device 6 according to Fig.3a. In a first step 31, the mounting brackets 16.1, 16.2 are loosely secured to the grooves 15.1, 15.2 with fasteners 17, the fasteners 17 forming a pivot axis D of the respective mounting bracket 16.1, 16.2. In a second step 32, the mounting brackets 16.1, 16.2 are folded towards the outer surface 14.2 of the profile 14. In a third step 33, the load-bearing retainer 13 is tilted over the drive shaft 7 and under the stiffening strut 11.3, i.e., into the interior 19. In a fourth step 34, the mounting brackets 16.1, 16.2 are erected. The mounting brackets 16.1, 16.2 then project outwards from the profile 14 in a radial direction R. In a fifth step 35, the mounting brackets 16.1, 16.2 are attached to the mounting plates 11.1, 11.2 using fasteners, and in a sixth step 36, all fasteners 17 are secured. Reference symbol list 1 elevator system 2 elevator shafts 2.1 Shaft head of the elevator shaft 3 elevator car 4 belt support devices 5 Deflection devices 6 Drive device 7 Drive shaft of the drive device 7.1 First end of the drive shaft 7.2 Second end of the drive shaft 7.3 Drive zone of the drive shaft 8 Counterweight 9 Motor of the drive device 10 Brake of the drive device 11 Housing of the drive device 11.1 First mounting plate of the housing 11.2 Second mounting plate of the housing 11.3 Housing stiffening strut 13 Load-bearing capacity hold-down devices 14 Profile of the load-bearing clamp 14.1 Inside of the profile 14.2 Outside of the profile 15.1 Groove on the outside of the profile 15.2 Groove on the outside of the profile 16.1 Mounting brackets 16.2 Mounting brackets 17 Fasteners 19 Interior space between the drive shaft and the housing 20.1 first half of the profile 20.2 second half of the profile 22 Connecting plate 23 Fasteners 30 methods for installing a load-bearing clamp 31 First step - loosely securing the mounting brackets to the grooves 32 Second step - Folding the mounting brackets 33 Third step - Tilting in the load-bearing clamp 34 Fourth step - Erecting the mounting brackets 35 fifth step - Attaching the mounting brackets 36 sixth step - Securing all fasteners AX axial direction D axis of rotation (formed by fastening means) R radial direction V vertical direction QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 6,601,828 B2

[0009] WO 2016 / 092592 A1

[0010]

Claims

[1] Belt retainer (13) for securing a belt support (4) resting on a drive zone (7.3) of a drive shaft (7) in a drive device (6) of an elevator system (1) against lifting off the drive zone (7.3), comprising a profile (14) which is rounded on at least one inner side (14.1) for partially encircling the drive shaft (7) in the area of ​​at least one drive zone (7.3) with a radial distance between the drive shaft (7) and the inner side (14.1) of the profile (14) provided for the belt support element (4) to pass through; and at least two mounting brackets (16.1, 16.2) each for mounting on a housing (11) of the drive device (6) on the one hand and on the profile (14) on the other hand; wherein the profile (14) has at least two grooves (15.1, 15.2) extending in its axial direction (AX) on an outer side (14.2) for the positionally variable fastening of the mounting brackets (16.1, 16.2) by means of fastening means (17) engaging in the grooves (15.1, 15.2). [2] Load-bearing retainer (13) according to claim 1, wherein the two grooves (15.1, 15.2) are open in directions aligned with each other and opposite to each other, so that fastening means (17) can be inserted into the grooves (15.1, 15.2) in alignment with each other from different sides. [3] Load-bearing retainer (13) according to claim 2, wherein two mutually aligned fastening means formed a pivot axis (D) of the associated mounting bracket (16.1, 16.2) such that the mounting bracket (16.1, 16.2) can be folded onto the outside (14.2) of the profile (14). [4] Load-bearing retainer (13) according to claim 1, wherein the grooves (15.1, 15.2) are open parallel to each other in the same direction, so that fastening means (17) can be inserted parallel to each other from the same direction into the grooves (15.1, 15.2). [5] Load-bearing capacity retainer (13) according to one of the preceding claims, wherein the profile (14) is designed to grip the drive shaft (7) by half its circumference. [6] Load-bearing retainer (13) according to one of the preceding claims, wherein the profile (14) is divided into two halves (20.1, 20.2) along the axial direction (AX) and wherein each half (20.1, 20.2) has a groove (15.1, 15.2). [7] Load-bearing retainer (13) according to one of the preceding claims, wherein the grooves (15.1, 15.2) are designed to accommodate T-nuts, in particular T-nuts with a thread for accommodating a screw. [8] Drive device (6) for a belt support element (4) of a lift system (1), comprising a first mounting plate (11.1) for mounting a motor (9); a motor (9) arranged on the first mounting plate (11.1); a drive shaft (7) mounted on the motor (9) with at least one drive zone (7.3) for receiving a belt support element (4); a second mounting plate (11.2) opposite the first mounting plate (11.1), in particular for receiving a brake (10) acting on the drive shaft (7); and at least two stiffening struts (11.3) extending between the mounting plates (11.1, 11.2) parallel to the drive shaft (7); wherein the drive shaft (7) extends through the receiving plates (11.1, 11.2) and the at least one drive zone (7.3) is arranged between the receiving plates (11.1, 11.2); and wherein a load-bearing retainer (13) according to one of the preceding claims is held by the mounting brackets (16.1, 16.2) on the two receiving plates (11.1, 11.2) and the drive shaft (7) partially surrounds at least one area of ​​the at least one drive zone (7.3). [9] Drive device (6) according to claim 8, wherein the load-bearing capacity retainer (13) is arranged directly below a stiffening strut (11.3). [10] Drive device (6) according to claim 8 or 9, wherein the receiving plates (11.1, 11.2) and the stiffening struts (11.3) are formed integrally as a cast part. [11] Lift installation (1) comprising a lift shaft (2) extending in a vertical direction (V); at least one elevator car (3) movable in the elevator shaft (2); at least one drive device (6) arranged at an upper end of the elevator shaft (2) according to one of claims 8 to 10; and at least one belt support element (4) running between the drive device (6) and the car (3) and received on a drive zone (7.3) of the drive shaft (7). [12] Method (30) for installing a load-bearing capacity hold-down device (13) according to claim 3 on a drive device (6) according to claim 9; comprising the steps: loosely securing (31) the mounting brackets (16.1, 16.2) to the grooves (15.1, 15.2) with fasteners (17), wherein the fasteners (17) form an axis of rotation (D) of the respective mounting bracket (16.1, 16.2); Folding (32) the mounting brackets (16.1, 16.2) towards the outside (14.2) of the profile (14); Tilting (33) the load-bearing retainer (13) over the drive shaft (7) and under the stiffening strut (11.3); Erecting (34) the mounting brackets (16.1, 16.2); Attach (35) the mounting brackets (16.1, 16.2) to the mounting plates (11.1, 11.2) using fasteners; and Securing (36) all fasteners (17).

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