Multi-part shaft device of a drive train of a lift system, correspondingly equipped drive train, and use

Abstract

In the design of drive trains in particular for belt drives of lift systems, a good compromise needs to be found between costs, variability and material use. A shaft device is provided for the drive train of a lift system, wherein the shaft device has, in a functional design as a common shaft, a first axial portion with a first diameter and at least one further axial portion with at least one further diameter, wherein the first axial portion defines a driving zone of the shaft device, wherein the at least one further axial portion in each case defines a drive zone or brake zone; according to the invention, the first axial portion and the at least one further axial portion are provided in a manner separable from one another as shaft portions which can be or are coupled to one another for conjoint rotation, wherein a / the diameter variation from the first to the corresponding further diameter is ensured by at least one coupling component. This also enables high variability to be achieved at minimised material costs. The invention also relates to a correspondingly equipped drive train arrangement for a lift system, a correspondingly equipped lift system, and corresponding uses.

Description

[0001] Multi-part shaft device of a drive train of an elevator system as well as correspondingly equipped drive train and use

[0002] TECHNICAL FIELD

[0003] The present invention relates to a multi-part (drive) shaft device for a drive train of an elevator system, wherein the shaft device, in functional design as a common shaft, has a first axial section with a first diameter and at least one further axial section with at least one further diameter, wherein the first axial section defines a drive zone of the shaft device, wherein the at least one further axial section defines a drive zone or a braking zone. Furthermore, the present invention also relates to correspondingly equipped drive train assemblies for elevator systems and correspondingly equipped elevator systems and corresponding uses of at least positive-locking coupling components for providing connectable axial sections of a shaft device for an elevator system.In particular, the invention relates to shaft devices and uses according to the preamble of the respective independent claim.

[0004] BACKGROUND OF THE INVENTION

[0005] When designing drive trains, especially for belt drives in elevator systems, one of the engineers' goals is to find a good compromise between cost, variability, and material usage. This goal must also be met for drive shaft components, as these are subject to high loads and, for example, friction in the area of ​​interaction with at least one belt, and therefore require comparatively high material quality. (Drive) shafts are typically manufactured using machining processes (i.e., at least some of the manufacturing steps).

[0006] According to the state of the art, for the production of a (drive) shaft by machining (especially turning), the blank is selected with reference to the largest design-specified (outer) diameter of the shaft. In other words: The usually cylindrical blank has this largest outer diameter over its entire length and must be "turned down" to size in each respective section. If the shaft is very long and / or the shaft is to have a comparatively small diameter in certain sections (e.g., in at least one bearing section), a comparatively large proportion of machining waste (material scrap or excess consumption) is generated during turning, which can easily account for a high double-digit percentage of the material of the blank. This is particularly disadvantageous if the material of the shaft (shaft material) is very cost-intensive and / or of very high quality, and, for example,is only required for a certain area of ​​the shaft (for example, in the area of ​​a coating of the drive zone). Last but not least, it should also be considered that excessive material removal causes considerable wear on the tools used in production, with the disadvantage that not only the material costs but also the tool costs are comparatively high. Accordingly, there is interest in a more advantageous approach to the design and layout of such (drive) shafts, particularly designed for a drive train of elevator systems, especially for belt drives.

[0007] An example is publication US 2007 / 056 804 A1, which describes a redundant design of a braking system of an elevator system, particularly in a mirror-symmetrical configuration, whereby drive components can also be designed redundantly, and the corresponding shaft sections, particularly functionally identical shaft sections, can be connected to one another by a positive coupling. Based on the state of the art, there is a noticeable need for an even more advantageous shaft design.

[0008] SUMMARY OF THE INVENTION

[0009] The objective is to provide a shaft device for elevator drive trains that achieves a good compromise between cost and material usage for the construction of the shaft device, even when the shaft device has a comparatively large axial length and / or comparatively large diameter variations. The objective is also to design a shaft device specifically for belt drives in elevator systems in such a way that a material selection for the shaft device can be made with high variability / flexibility, largely independent of the diameter or axial length with which the respective shaft device is to be designed.Last but not least, it is the task of designing a shaft device of a belt drive of an elevator system that is supported on both sides in such a way that, on the one hand, a high-quality drive zone for coupling with at least one belt can be provided and, on the other hand, the shaft device can be designed in a cost-optimized manner for an advantageous installation situation, in particular also with regard to the respective bearing section, in particular also with the advantage of the fastest and most cost-efficient production possible.

[0010] This object is achieved by a shaft device according to claim 1 and by uses according to the respective subordinate use claim. Advantageous developments of the invention are explained in the respective subclaims. The features of the exemplary embodiments described below can be combined with one another unless explicitly stated otherwise.

[0011] A shaft device is provided configured for the drive train of an elevator installation, wherein the shaft device in a functional design as a common shaft, in particular of a belt drive, has a first axial section with a first diameter and at least one further axial section with at least one further diameter, wherein the first axial section defines a drive zone of the shaft device, in particular a drive zone configured to interact with at least one belt of a / the belt drive, wherein the at least one further axial section defines a drive zone or a braking zone;

[0012] According to the invention, it is proposed that the first axial section and at least one of the further axial sections be provided as (separable) shaft sections that can be separated from one another and are coupled / connected to one another in a rotationally fixed manner, in particular by means of an at least positive-locking (claw) coupling, wherein a diameter variation from the first to the corresponding further diameter of the at least one of the further axial sections is ensured by at least one coupling component. This makes it possible to produce the individual axial sections from blanks with a correspondingly small diameter and, in the process, to advantageously integrate the respective coupling components into the respective shaft section. In other words: a conventionally one-piece (drive) shaft is divided into several axial sections, i.e., is designed in several parts, wherein the individual axial sections couple to one another in a positive-locking manner.The coupling components of adjacent axial sections are arranged in the area of ​​a shaft shoulder formed at the interface between the axial sections due to the different diameters. This also provides variability in the design of the intermeshing coupling components, particularly with regard to their relative position at the end face or circumference.

[0013] Thus, the present invention is based on the concept of segmenting a standard or conventionally one-piece integrally designed (drive) shaft into several individual parts or axial sections (at least two), thereby facilitating cost-effective production of the respective axial sections and thereby reducing material waste, making the material selection more variable, and minimizing wear on tools used for production.

[0014] According to the present disclosure, a "common shaft" is to be understood in particular as a shaft device in which the individual, functionally distinct axial sections (in particular, drive zone, drive zone, braking zone) are to be provided on a common shaft that is as single-piece or as compact as possible, i.e., not supported separately from one another by different shafts or in different installation positions or orientations, or in different bearings. As single-piece as possible is to be understood as a configuration in which the design or structural layout initially assumes a preferably single-piece, integral configuration in which the individual functional axial sections are each provided by machining processes from the single solid material of the integral shaft.

[0015] According to the present disclosure, "diameter" is to be understood in particular as the respective maximum outer diameter of the corresponding axial section, i.e., when referring to integrally formed shafts, this means the minimum diameter required to manufacture the corresponding axial section integrally from one piece. For example, the first axial section is designed with the largest diameter, the second axial section with the second largest diameter, and the third axial section with the third largest diameter. The material and cost savings potential outlined here becomes particularly noticeable when a relatively higher material quality is required for the first axial section than for the second and / or third axial section.

[0016] According to the present disclosure, "at least positively locking" is to be understood in particular as a coupling connection that ensures coupling at least based on positive locking, and optionally also based on frictional locking; in this respect, "at least positively locking" can conceptually encompass purely positive locking or both positive and frictional locking.

[0017] The shaft is divided into, for example, three individual parts or axial sections: drive zone (first axial section), drive zone (second axial section, motor zone), and brake zone (third axial section). For example, the drive zone has the largest diameter; the drive zone also has a coating, for example; the drive zone is made of a comparatively high-quality material (e.g. 42CrMo4, hardened and tempered by further material treatments, in particular by tempering treatments that affect the material structure and / or treatments that affect the hardness). The other (second and third) zones or axial sections can be made of a less cost-intensive material and be significantly smaller in diameter (optionally have different diameters, particularly to facilitate assembly), which also means that their blank diameter can be selected to be smaller, so that machining waste can be significantly minimized.The individual zones can be connected to one another in the axial direction in a rotationally fixed manner, e.g. by means of a form-fitting connection (for example by means of a coupling in the type of a claw coupling with intermeshing axially projecting circumferential segments); optionally, centering / securing can also be carried out, for example by means of a centrally arranged / aligned cylindrical pin or a threaded rod. In the connecting section (hereinafter also referred to as the coupling), the torque transmission can be ensured, in particular between the drive unit (motor) and the drive zone or between the drive zone and the brake unit. It will be apparent to those skilled in the art that the type of connection of the individual shaft sections described here can also be varied.In particular, the preferably form-fitting coupling components described here can also be provided as force-fitting coupling components, for example, as partially force-fitting coupling components that complement the form-fitting. Regarding the described (axial) locking, a cylindrical pin can be replaced by, for example, a threaded rod. Depending on the design of the coupling, the coupling itself can prevent such a threaded rod from loosening.

[0018] The advantages that can be realized by the present invention also include high savings potential for the respective raw part or semi-finished product, faster production (of the axial sections that are relatively shorter compared to the entire shaft), as well as advantageously cost-effective material alternatives for the less heavily stressed axial sections, in particular for those axial sections that are not coupled with belts.

[0019] According to one embodiment, an at least positive-locking (claw) coupling is formed between the first and a / the adjacent further axial section. This ensures particularly robust torque transmission, with the individual circumferential segments or claws advantageously being variably scaled in size and number for the respective application.

[0020] According to the present disclosure, particular reference is made to the claw coupling type and corresponding circumferential segments that positively engage one another. Based on this, one skilled in the art can provide alternative types of at least positively engaging couplings, for example, coupling sections that also act force-lockingly based on conicity (e.g., coupling sections that are also comprehensively optimized for static friction). The positive engagement described here, in particular based on axially engaging coupling components, provides a configuration that is also advantageous with regard to the installation situation and assembly of the shaft device.According to one embodiment, the shaft device is formed from at least three axial sections, each of which is / are connected to one another in a rotationally fixed manner by means of an at least positive (claw) coupling, in particular directly adjacent to one another with a minimized axial extension of the respective, preferably rigid (claw) coupling. This also provides a good compromise between high torque transferability and an advantageously small / short overall length for the respective coupling section; in other words: the provision of a coupling does not have a noticeably adverse effect on the overall length of the shaft device and / or on the material requirements.

[0021] According to one embodiment, at least two adjacent axial sections of the shaft device have different maximum outer diameters. This configuration makes it possible to at least partially implement or bridge a diameter variation using coupling components.

[0022] According to one embodiment, at least two adjacent axial sections of the shaft device are made of different materials, in particular having at least one different surface / surface (or coating). This design can be realized in a particularly variable and cost-optimized manner thanks to the coupling interface.

[0023] According to one exemplary embodiment, an (axial) securing device is provided on at least two adjacent axial sections of the shaft device, in particular comprising an axially installed cylindrical pin or an axially installed threaded rod. A functional separation in such a way that the actual coupling component is intended to fulfill essentially only a torque transmission function also enables a focused and lean design of the coupling components and in this regard also opens up greater design variation options. The axial securing of the axial sections can therefore advantageously be ensured by additional components. A threaded rod can, for example, be mounted through a central threaded bore and connect at least two axial sections to one another in an axially fixed manner, thereby preventing the coupling from becoming loose in the claw coupling type primarily described here.The threaded rod can be secured on the end face of external axial sections by nuts or similar locking devices.

[0024] According to one embodiment, the axial sections also define a drive zone (interface to the motor) in addition to the drive zone. This allows the axial segmentation concept described here to also be implemented at the torque transmission interface between the drive and the drive zone, so that an axial section interacting with a torque-generating drive device can also be designed with optimized material and surface properties, particularly independent of specifications for the drive zone.

[0025] According to one embodiment, the axial sections also define a braking zone (interface to the braking unit) in addition to the drive zone. This makes it possible to implement the axial segmentation concept described here at the torque transmission interface between the drive zone and the braking unit, so that an axial section interacting with a braking device can also be designed with optimized material and surface finish, particularly independent of specifications for the drive zone.

[0026] According to one embodiment, the respective axial sections, which, when coupled together, form the shaft device, are each designed as a single piece, in particular made of solid material, optionally having a central (threaded) bore or receptacle for a centering pin or the like of coupling components or a separate securing component (such as a threaded rod). With a single piece, integral design of at least two axial sections, the advantages described here are particularly noticeable, especially with regard to material costs.

[0027] According to one exemplary embodiment, one (first or second) of the coupling components of two adjacent axial sections is arranged at the end face, and the other (first or second) of the coupling components is arranged at the circumference. This also makes it possible to make even better use of the available (solid) material, particularly in the area of ​​diameter variations, and also to advantageously form the coupling components in an integrally robust manner on the respective axial section. The coupling components or circumferential segments, which can be individually designed for the respective application, can be configured to act at least in a form-fitting manner and optionally also in a force-fitting manner, and can be easily varied in number, size, and shape.

[0028] According to one embodiment, the first axial section provides a first positive-locking coupling component, which is arranged on the end face of the first axial section, in particular in the axial extension, wherein the at least one further axial section (in each case) provides a second positive-locking coupling component, which is arranged circumferentially on the corresponding further axial section, in particular in the radial extension; or vice versa (i.e. on the end face of the further axial section and circumferentially on the first axial section, which enables further material savings with regard to the maximum diameter of the further axial sections). This also provides a good compromise between material usage and overall length, wherein an advantageously large torque transmission diameter for the coupling components can also be realized from a design point of view.

[0029] According to one embodiment, coupling components or circumferential segments are designed with end faces on both sides of the first axial section (drive zone), i.e., at both ends of the first axial section, each end face in the axial direction (i.e., not in the radial direction on the circumferential side). This favors a design with a comparatively thin blank, in particular such that the diameter required for the drive zone blank does not have to be selected larger due to any coupling components.

[0030] Based on the variants described here, the person skilled in the art can provide further variations regarding the end-face or circumferential relative position of the individual coupling components, e.g., to the extent that at least one coupling interface is coupled exclusively by coupling components arranged at the end face, i.e., at both the one and the other of the coupling axial sections. According to one exemplary embodiment, the first axial section (i.e., the drive zone) has a plurality of drive zone sections that can be separated from one another as (separate) shaft sections, each of which is / can be connected to one another in a rotationally fixed manner by means of an at least positive (claw) coupling.Last but not least, this enables even greater variability and further (material) cost savings potential, for example with regard to configurations in which three or more drive zone sections are provided, of which only two are coupled with a belt (the further drive zone section, for example, arranged intermediately in the middle, is / remains neutral without a coupling belt and can therefore be designed more cost-effectively with lower material quality requirements). For example, this also allows so-called "dual drive" concepts to be implemented in a comparatively variable and easily customizable manner. For example, five drive zone sections or five sections each axially separated from one another by a web or shoulder are provided within the drive zone, of which the middle zone remains a neutral zone that is not coupled with a belt.The coupling components described here can then advantageously also be implemented in the area of ​​the respective web or shoulder, i.e., even within the drive zone on an axial section with varying diameters. In other words: The modular concept described here with regard to the individual axial sections, based on coupling end faces, can also be continued within a respective axial section, namely by further axially segmenting the respective axial section, whereby the individual axial segments or shaft sections can also advantageously be connected to one another in a rotationally fixed manner by means of at least positive-locking coupling components.

[0031] According to one embodiment, the at least one clutch component comprises at least one clutch disc configured to connect adjacent axial sections and configured to radially bridge the diameter variation between the adjacent axial sections, particularly in the case of radial overlap and radial protrusion also from the axial section with the larger diameter, in particular by the clutch disc also providing a shoulder or web for the drive zone. This enables further optimizations with regard to very cost-effective material use and, not least, high variability, e.g., with regard to the material selection or the length of the entire shaft device.

[0032] The present invention therefore presents measures for realizing the large diameter jumps that occur or are unavoidable in single-piece or even multi-piece shafts based on a highly optimized design, in particular with regard to avoiding large removal of raw material down to small diameters. In this respect, complex machining of the interfaces of the basic parts (engine part, drive zone, brake part) can be dispensed with, particularly since the outer diameter of the respective blank can be selected very close to the nominal diameter. For example, the basic parts are essentially provided as cylindrical semi-finished products, e.g., with particularly advantageous variations in material type / material depending on the application.

[0033] According to the present disclosure, the described clutch discs can be provided as additional parts for connecting three cylindrical base parts, in particular for the purpose of transmitting axial force via these clutch discs. The clutch discs can also serve as bearing stops. Optionally, the respective clutch disc can also serve as a shoulder or web of the drive zone or the corresponding drive zone section, in particular for limiting the axial movement of a belt. For example, the clutch discs are screwed to the adjacent base parts (or axial sections) and optionally also centered. Optionally, the force transmission between the base parts can also be implemented in a form-fitting manner, with or without additional parts.An example of an additional part is a key, which is so high in its radial extension that it can be inserted into the clutch disc and projects into the adjacent parts, optionally transmitting the torque between the motor part (motor zone) and the drive zone or between the brake part (brake zone) and the drive zone and vice versa. Screws can advantageously absorb axial forces that arise from the load on the shaft and its circumferential deflection. In connection with the present invention, the respective raw material or semi-finished product can be used without great waste / rejection, in particular since no large diameter jumps are provided on the respective individual parts. Torque transmission preferably takes place in a form-fitting manner on form-fitting clutch contours, whereby additional parts can also be provided on an application-specific basis to improve the force transmission in at least one spatial direction.Thus, according to the invention, production can be designed as simply and (cost) efficient as possible.

[0034] It should be understood that the same type or dimensions can be provided for two or more clutch discs for the entire shaft device.

[0035] If screws are provided as fastening elements, i-bolts, for example, can be used to mount the clutch disc to the engine zone or the brake zone, and j-bolts, for example, can be used to mount the clutch disc to the drive zone. An advantageous assembly sequence is to first attach the (respective) clutch disc to the engine zone or the brake zone, and then to the drive zone or the corresponding drive zone section.

[0036] Centering can be realized, for example, by means of at least one centering screw connection and / or by means of centering pins.

[0037] According to one embodiment, the clutch disc is bolted to at least one of the axial sections, particularly in the axial direction using fastening means (e.g., i-bolts and j-bolts), and optionally also centered. This also facilitates a very secure arrangement for applications where comparatively high axial forces must be transmitted.

[0038] According to one embodiment, the clutch disc is positively connected to at least one of the axial sections, in particular by means of a key inserted into the clutch disc, which is dimensioned in height and position such that it engages in at least one of the axial sections, optionally in both adjacent axial sections. This design not least favors a configuration that is essentially based on positive locking and is also advantageous in terms of simple assembly.

[0039] According to one embodiment, a clutch disc is provided on each side of the drive zone, forming both a bearing stop and a shoulder of the drive zone, in particular the same clutch disc in a mirror-image installation situation (at least mirror-image except for a possible diameter variation of a radially inner mounting circle required with respect to the diameters of the motor zone and the braking zone). This configuration can further optimize the implementation of the concept underlying the present invention.

[0040] According to one exemplary embodiment, the at least one coupling component comprises at least one coupling element configured for transmitting axial force and for holding the adjacent axial sections in position, which coupling element interacts axially securely with the corresponding axial sections, optionally using integrated and / or separate fastening means. By means of the at least one coupling element, the axial connection or securing can in particular also be optimized, in particular a "gaping" of an exclusively or at least essentially form-fitting coupling can be counteracted. The coupling element can, for example, be provided as a type of coupling ring / nut, for example in a combination of a claw coupling with a coupling nut, which is / is screwed to a / the driving zone section by means of an external thread.A further advantage of this modular design is the ability to retrofit, especially (only) for applications where very high axial forces have to be transmitted.

[0041] Advantageously, a front section of the coupling element can function or be positioned as a web or shoulder of the drive zone. This functional integration or extension allows one or the largest diameter of the entire shaft assembly to be provided by a separate part, which can also assume an axial locking function, which is important for at least some specific applications.

[0042] According to one embodiment, at least one axial position of the shaft device provides the at least one coupling element on the corresponding axial section only over the axial section with the smaller diameter and is connected to the further axial section by means of separate fastening means, in particular by means of fastening means engaging on the front side, e.g. screws. This can also enable a connection on a comparatively small circular diameter and, at least in certain configurations of the drive train, advantageous front-side accessibility, in particular with minimized material usage for the

[0043] Dimensions of the coupling element with a smaller diameter, oriented axially from the section. This design can be provided in a particularly space- and material-saving manner, for example, even in drive zone sections where webs / shoulders are already provided. In other words: an external thread is not necessarily required; it can also be replaced with a coupling ring without a thread, at least with approximately the same effect. For example, a coupling ring is screwed to the drive zone section in the axial direction using several screws (in particular, arranged concentrically around the shaft axis).

[0044] It should be understood that, in the case of an at least essentially positive-locking coupling, axially acting fastening means or screws can advantageously be provided, by means of which high axial forces can be absorbed, e.g., in the case of very high shaft loads, e.g., in the case of high circumferential deflection. This can also counteract gaping at the respective interface. Nevertheless, the axially locking fastening means described here can be provided by a person skilled in the art for individual applications and, if necessary, depending on the overall context. For some applications, they can also be omitted, e.g., depending on any axially preloaded bearings.

[0045] In particular, in connection with the other components described here (coupling disc, coupling element), it becomes clear that the present invention allows the concept or the basic idea of ​​modularity to be realized in different constructive facets, and that the respective measures are particularly accompanied by the advantage of cost-effective and time-efficient production or provision of the entire shaft device.

[0046] The aforementioned object is also achieved by a drive train arrangement for an elevator installation with a shaft device according to the present disclosure, in particular with the shaft device mounted on both sides of the first axial section (i.e., on both sides of the drive zone) in a belt drive of the elevator installation or in bearings of the belt drive. This results in the aforementioned advantages, in particular with regard to high variability in the application-specific design of the drive zone, e.g., with regard to scaling the number of drive zone sections (e.g., for three belts, optionally also with at least one neutral section). The bearing is designed, for example, as an axial fixed bearing (in particular on the side of a / the drive zone) and / or as a floating bearing (in particular on the side of a / the braking zone).

[0047] The aforementioned object is also achieved by an elevator system with a drive train arrangement comprising a shaft device according to the present disclosure. Based on the aforementioned advantages, this also facilitates the provision of the shaft components of the drive train in a manner that is as application-specifically optimized as possible and yet cost-optimized.

[0048] The aforementioned object is also achieved by using at least one at least positive-locking coupling for the at least positive-locking coupling of at least two axial sections of a shaft device of a drive train of an elevator installation, in particular a shaft device according to the present disclosure, wherein the shaft device, in a functional configuration as a common shaft, has a first axial section with a first diameter and at least one further axial section with at least one further diameter, wherein the first axial section defines a drive zone of the shaft device, wherein the at least one further axial section each defines a drive zone or a braking zone; wherein the first axial section and at least one further axial section are provided by means of the at least one at least positive-locking coupling, separable from one another as shaft sections, which are rotatably coupled / coupled to one another,wherein a diameter variation from the first to the corresponding further diameter is ensured by means of at least one coupling component of the at least one at least positive coupling, in particular by providing at least one positive coupling component on the front side and at least one positive coupling component on the circumference. This allows the aforementioned advantages to be realized, in particular with regard to a very slim integration of the coupling components into the respective, preferably one-piece, integrally designed axial section.In particular, with the coupling components in a one-piece, integral design. This also enables high robustness and reliability, as well as good system safety. Coupling components of adjacent axial sections of the common shaft are provided in the area of ​​a shaft shoulder formed at the interface between the axial sections due to the different diameters.

[0049] The aforementioned object is also achieved by using at least one at least positive-locking coupling for the at least positive-locking coupling of at least two axial sections of a shaft device of a drive train of an elevator system, wherein the shaft device, in a functional design as a common shaft, has a first axial section with a first diameter and at least one further axial section with at least one further diameter, wherein the first axial section defines a drive zone of the shaft device, wherein the at least one further axial section each defines a drive zone or a braking zone; wherein the first axial section and at least one further axial section are provided by means of the at least one at least positive-locking coupling so as to be separable from one another as shaft sections which can be coupled / coupled to one another in a rotationally fixed manner,wherein a diameter variation from the first diameter to the corresponding further diameter is ensured by means of at least one coupling component of the at least one at least positive coupling, wherein the at least one coupling component comprises at least one clutch disc configured to connect respectively adjacent axial sections and configured to bridge the diameter variation between the respectively adjacent axial sections. Coupling components of adjacent axial sections of the common shaft are provided in the region of a shaft shoulder formed at the interface between the axial sections due to the different diameters. This allows the aforementioned advantages to be realized, particularly with regard to even more efficient reduction of diameter variations on individual parts.

[0050] The aforementioned object is also achieved by using at least one at least positive-locking coupling for the at least positive-locking coupling of at least two axial sections of a shaft device of a drive train of an elevator system, wherein the shaft device, in a functional design as a common shaft, has a first axial section with a first diameter and at least one further axial section with at least one further diameter, wherein the first axial section defines a drive zone of the shaft device, wherein the at least one further axial section each defines a drive zone or a braking zone; wherein the first axial section and at least one further axial section are provided by means of the at least one at least positive-locking coupling so as to be separable from one another as shaft sections which are rotatably coupled to one another,wherein a diameter variation from the first diameter to the corresponding further diameter is ensured by means of at least one coupling component of the at least one at least positive coupling, wherein the shaft device comprises at least one coupling element configured for transmitting axial forces and for holding the adjacent axial sections in position, which coupling element interacts with the at least one coupling component at the corresponding axial sections. Coupling components of adjacent axial sections of the common shaft are provided in the region of a shaft shoulder formed at the interface between the axial sections due to the different diameters. This allows the aforementioned advantages to be realized, particularly with regard to a very secure arrangement, even with comparatively high axial forces to be transmitted across the interface between two of the axial sections.

[0051] Summary: When designing drive trains, especially for belt drives in elevator systems, it is also important to find a good compromise between costs, variability and material usage.A shaft device is provided for the drive train of an elevator installation, wherein the shaft device, in a functional design as a common shaft, has a first axial section with a first diameter and at least one further axial section with at least one further diameter, wherein the first axial section defines a drive zone of the shaft device, in particular a drive zone configured to interact with at least one belt, wherein the at least one further axial section each defines a drive zone or a braking zone; According to the invention, the first axial section and at least one further axial section are provided separable from one another as (separate) shaft sections which are coupled / coupled to one another in a rotationally fixed manner, wherein a / the diameter variation from the first to the corresponding further diameter is ensured by at least one coupling component.Coupling components of adjacent axial sections of the common shaft are provided in the area of ​​a shaft shoulder formed at the interface between the axial sections due to the different diameters. This also ensures high variability while minimizing material costs. The invention further relates to a correspondingly equipped drive train arrangement for an elevator system, as well as to a correspondingly equipped elevator system and corresponding uses of coupling components on axial sections of such a shaft device functioning as a common shaft.

[0052] SHORT DESCRIPTION OF THE CHARACTERS

[0053] The invention is described in more detail in the following drawing figures. Reference numbers not explicitly described in a particular drawing figure refer to the other drawing figures. They show:

[0054] Figure 1 shows a perspective side view of a shaft device according to an embodiment;

[0055] Figure 2 shows a perspective side view in exploded view of a shaft device according to an embodiment;

[0056] Figure 3 shows a shaft device according to an exemplary embodiment in an exploded side view, wherein optional additional coupling components are also indicated in the axial section of the drive zone; Figure 4 shows a perspective side view of a belt drive of a drive train arrangement with a shaft device according to an exemplary embodiment; Figures 5A, 5B show a shaft device according to a further exemplary embodiment in a side view and in an end view, each in a schematic representation;

[0057] Figures 6A, 6B show side views of a shaft device according to a further embodiment, each in a schematic representation;

[0058] Figure 7 shows a sectional side view in a schematic representation of an elevator system with a drive train arrangement with a shaft device according to an embodiment;

[0059] DETAILED DESCRIPTION OF THE FIGURES

[0060] The invention will first be explained with general reference to all reference numerals and figures. Special features or individual aspects of the present invention will be discussed in connection with the respective figure.

[0061] A shaft device 10 is provided in a functional design as a common shaft, in particular of a belt drive, comprising a first axial section (shaft section) 11 and at least one further (second, third) axial section (shaft section) 12, 13, wherein the first axial section 11 has a first maximum (outer) diameter Dl1 and provides a drive zone TI1, which can be divided or delimited into several drive zone sections, for example into a first drive zone section TI1a, a second drive zone section TI1b and a third drive zone section TI1c, which are each axially delimited from one another by a shoulder or a web, in particular each for the purpose of guiding a belt within the respective drive zone section. The second axial section 12 has a second maximum (outer) diameter Dl2, which in the example described here is smaller than the first diameter Dl1.The third axial section 13 has a third maximum (outer) diameter D13, which in the example described here is smaller than the second diameter D12, which also facilitates assembly, for example. In the exemplary embodiment described here, the second axial section 12 provides a motor zone (drive zone) T12, and the second axial section 13 provides a braking zone T13. The respective zones T11, T12, T13 can also be described as torque transmission zones with a corresponding function (torque introduction in T11, torque transmission to belt in T12, braking torque transmission in T13).

[0062] Coupling components (21, 22; 31, 32; 41, 42) of adjacent axial sections of the common shaft are provided in the region of a shaft shoulder formed at the interface between the axial sections due to the different diameters (shoulder in the region of the corresponding diameter variation from the first diameter Dl 1 to the corresponding further diameter Dl 2, D13).

[0063] The shaft device 10 is designed for a drive train 101 of an elevator system 100, in particular for installation in a belt drive unit (belt drive) 103 of the elevator system 100 and designed for coupling with at least one belt 3, in particular for the purpose of displacing at least one elevator car 107 in an elevator shaft 1. To accommodate the shaft device 10, the belt drive unit 103 can have a shaft bearing 105 (cf. area as indicated in Figure 4) with axial securing.

[0064] The inventive concept makes it possible to provide the first axial section 11 and at least one of the further axial sections 12, 13 as separable multi-part shaft sections which can be coupled to one another in a rotationally fixed manner, wherein a / the diameter variation from the first diameter D11 to the corresponding further diameter D12, D13 can be ensured by at least one coupling component 21, 22; 31, 32. In particular, a first positive-locking (claw) coupling 20 with a first coupling section 21 or a first coupling component is provided on the side of the drive zone T11, and a second coupling section 22 or a second coupling component is provided on the side of the motor zone T12, and / or a second positive-locking (claw) coupling 30 with a first coupling section 31 on the side of the drive zone T11 and a second coupling section 32 on the side of the braking zone T13.Optionally, the drive zone TI 1 can also be provided divided by further positive couplings 40, namely by first coupling sections 41 and second coupling sections 42. The respective connectable axial sections 11, 12, 13, TI 1a, Tl 1b, Tl 1c can be secured relative to one another by at least one (axial) securing means 50, in particular with the securing means 50 comprising at least one cylindrical pin 51 and / or at least one threaded rod, preferably in each case in a central arrangement and axial orientation (x).

[0065] Advantageously, one of the coupling components of two adjacent axial sections is arranged on the end face, in particular projecting axially (x), and the other of the coupling components is arranged on the circumferential side, in particular projecting radially (r).

[0066] This is followed by a specific reference to the respective drawing figure.

[0067] Fig. 1 shows a shaft device 10 in a coupled arrangement. The motor zone T12 is coupled to the drive zone T11, and the braking zone T13 is coupled to the drive zone T11 on the opposite side. The drive zone T11 has three sections T11a, T11b, and T11c, each of which is separated from one another by a radially projecting web. Optionally, a coupling acting at least in a positive manner can also be provided in each of these web regions.

[0068] In Fig. 2, claw coupling components 21, 22, 32 can be seen. The claw coupling components 21 of the drive zone section 11, which has the largest diameter D11, are provided on the end face in an axial extension, and the claw coupling components 22, 32 of the two further axial sections 12, 13, each having a smaller diameter D12, D13, are provided on the circumferential side in a radial extension (in particular, without axially protruding from the end face of the corresponding axial section). In this exemplary embodiment, three claw coupling components arranged evenly distributed over the circumference couple to one another, wherein the claw coupling components can optionally also be scaled in number and / or size (axial and / or radial extension).

[0069] Fig. 3 shows the relative position of the exemplary securing elements 51, here embodied as centering pins. Fig. 4 shows an example of a belt drive 103 in which the shaft device 10 described here can be installed. The drive zone TI 1 is arranged approximately centrally and is concealed by a cover or a sheet metal strip, by means of which the guidance of the at least one coupling belt (not shown) can be facilitated.

[0070] Figs. 5A and 5B show an embodiment of a shaft device 10 comprising two clutch discs 60. The respective clutch disc 60 is connected to the corresponding axial section either positively or non-positively, in particular by means of screws and / or centering pins (optionally also by means of parallel keys). In the variant shown in Fig. 5A, a connection is made on both sides by means of fastening means 70 in the form of screws, advantageously by means of a first type of screws 71 (in particular i-screws) with a smaller outer diameter and by means of a second type of screws 72 (in particular j-screws) with a larger outer diameter (drive zone section 11).

[0071] With regard to the disclosure of Figure 5, it should be understood that the respective clutch disc has at least approximately the diameter of the larger-diameter axial section, in particular in order to be able to ensure axial force transmission in the region of an advantageously large outer diameter circle, i.e. even with effective leverage, particularly in the event that high bending forces / moments are exerted on the shaft device. Nevertheless, the diameter variation from the small to the large diameter at the corresponding axial interface is advantageously also ensured by the at least one clutch component, in particular with regard to advantageous torque stiffness and intended torque transmission. In this respect, the respective machine element described here can also be expediently designed and dimensioned with regard to one of these power transmission types.

[0072] 6A and 6B show an exemplary embodiment of a shaft device 10 comprising at least one coupling element 80. The coupling element 80 is fastened to at least one axial section by fastening means 81, optionally by means of separate fastening means and / or by means of integrated fastening means. In the variant according to Fig. 6A, the coupling element is equipped with fastening means in the form of an integrated thread 81 and engages the larger outer diameter (here: drive zone section 11). In the variant according to Fig. 6B, the coupling element is equipped with fastening means in the form of separate screws 81, which engage the end face of the axial section with the larger diameter.

[0073] With regard to the disclosure of Figures 5 and 6, it should be understood that although the clutch disc 60 and the coupling element 80 are shown here as individual measures, they can also be implemented in combination with one another, in particular when at least one of the clutch discs 60 is integrated into the shaft device essentially based on a positive fit. However, a coupling element 80 can also be provided with an at least partially non-positive connection of the corresponding clutch disc 60 to the at least one adjacent axial section, in particular for the purpose of a higher-load axial force transmission interface.

[0074] Fig. 7 shows a rough sketch of an elevator system 100, wherein the belt drive 103 is arranged in a head region of a shaft 1, and the elevator car 107 is displaced by means of at least one belt 3. The belt 3 can also be guided circumferentially and / or coupled with counterweights. It should be understood that the belt 3 sketched in Fig. 7 preferably runs in a vertical direction, i.e., without a noticeable horizontal component; in this respect, the illustrated direction of travel is not to be understood as limiting.

[0075] List of reference symbols

[0076] I Elevator shaft

[0077] 3 straps

[0078] 10 Shaft device

[0079] II first axial section (shaft section)

[0080] 12 further (second) axial section (shaft section)

[0081] 13 further (third) axial section (shaft section)

[0082] 20 (first) positive coupling on two axial sections

[0083] 21 first coupling section or first coupling component

[0084] 22 second coupling section or second coupling component

[0085] 30 (second) positive coupling on two axial sections

[0086] 31 first coupling section or first coupling component

[0087] 32 second coupling section or second coupling component

[0088] 40 (further) positive coupling on two drive zone sections

[0089] 41 first coupling section or first coupling component

[0090] 42 second coupling section or second coupling component

[0091] 50 fuse

[0092] 51 cylindrical pin or threaded rod

[0093] 60 clutch disc

[0094] 70 Fasteners, especially screws

[0095] 71 first type of fasteners, in particular i-screws

[0096] 72 second type of fasteners, in particular j -screws

[0097] 80 coupling element

[0098] 81 Fasteners, in particular separate screw(s) and / or integrated thread

[0099] 100 elevator system

[0100] 101 Drive train (arrangement)

[0101] 103 Belt drive

[0102] 105 Shaft bearing with axial locking

[0103] 107 elevator car

[0104] DU first (outer) diameter

[0105] D12 further (second) diameter D 13 further (third) diameter

[0106] TU drift zone

[0107] T 11 a first driving zone section

[0108] T 11 b further (second) driving zone section T 11 c further (third) driving zone section

[0109] T12 Motor zone (drive zone)

[0110] T13 Braking zone r radial direction x axial direction

Claims

Patent claims 1. Shaft device (10) configured for a drive train of an elevator installation (100), wherein the shaft device (10), in a functional configuration as a common shaft, in particular of a belt drive, has a first axial section (11) with a first diameter (D11) and at least one further axial section (12, 13) with at least one further diameter (D12, D13), wherein the first axial section (11) defines a drive zone (TU) of the shaft device (10), in particular a drive zone configured for interaction with at least one belt of a / the belt drive, wherein the at least one further axial section (12, 13) defines a drive zone (T12) or a braking zone (T13) in each case;characterized in that the first axial section (11) and at least one of the further axial sections (12, 13) are provided as shaft sections which are separable from one another and which are coupled to one another in a rotationally fixed manner, wherein a / the diameter variation from the first diameter (D11) to the corresponding further diameter (D12, D13) of at least one of the further axial sections is ensured by at least one coupling component (21, 22; 31, 32), wherein coupling components of adjacent axial sections of the common shaft are provided in the region of a shaft shoulder formed at the interface between the axial sections due to the different diameters.; 2. Shaft device according to claim 1, wherein an at least positive coupling is formed between the first and a / the further axial section adjacent thereto.

3. Shaft device according to one of the preceding claims, wherein the shaft device is formed from three axial sections, which are each connected to one another in a rotationally fixed manner by means of an at least positive coupling, in particular immediately / directly adjacent to one another with minimized axial extension of the respective preferably rigid coupling.

4. Shaft device according to one of the preceding claims, wherein at least two adjacent axial sections of the shaft device have different maximum outer diameters.

5. Shaft device according to one of the preceding claims, wherein at least two adjacent axial sections of the shaft device are made of different material, in particular having at least one different surface / lateral surface.

6. Shaft device according to one of the preceding claims, wherein a securing means is provided on at least two mutually adjacent axial sections of the shaft device, in particular comprising an axially installed cylindrical pin or an axially installed threaded rod.

7. Shaft device according to one of the preceding claims, wherein the axial sections also define a drive zone in addition to the drive zone; and / or wherein the axial sections also define a braking zone in addition to the drive zone.

8. Shaft device according to one of the preceding claims, wherein the respective axial sections which, when coupled together, form the shaft device are each designed as a one-piece integral part, optionally comprising a central bore or receptacle for a centering pin or the like of a separate securing component from the coupling components.

9. Shaft device according to one of the preceding claims, wherein the at least one coupling component comprises at least one coupling disc (60) configured to connect respectively adjacent axial sections and configured to bridge the diameter variation between the respectively adjacent axial sections, in particular in the case of radial overlap and radial protrusion also from the axial section with the larger diameter, in particular in that the coupling disc (60) also provides a shoulder or a web of the drive zone.

10. Shaft device according to the preceding claim, wherein the clutch disc (60) is screwed to at least one of the axial sections, in particular in the axial direction by means of fastening means (70; 71, 72), and is optionally also centered; and / or wherein the clutch disc (60) is positively connected to at least one of the axial sections, in particular by means of a feather key inserted into the clutch disc, which is dimensioned in height and position such that it engages in at least one of the axial sections, optionally in both respectively adjacent axial sections.

11. Shaft device according to one of the preceding claims, wherein a clutch disc (60) is provided on each side of the drive zone (TI 1), which forms both a bearing stop and a shoulder of the drive zone, in particular the same clutch disc in a mirror-image installation situation.

12. Shaft device according to one of the preceding claims, wherein the at least one coupling component comprises at least one coupling element (80) configured for transmitting axial force and for holding the adjacent axial sections in position, which coupling element interacts axially with the corresponding axial sections, optionally using integrated and / or separate fastening means (81).

13. Shaft device according to the preceding claim, wherein at least one axial position of the shaft device, the at least one coupling element (80) is present on the corresponding axial section only over the axial section with the smaller diameter and is connected to the further axial section by means of separate fastening means (81), in particular by means of fastening means engaging on the end face.

14. Drive train arrangement (101) for an elevator installation (100) with a shaft device (10) according to one of the preceding claims, in particular with the shaft device (10) mounted on both sides of the first axial section (11) in a belt drive (103) of the elevator installation (100).

15. Elevator system (100) with a drive train arrangement (101) according to the preceding claim.

16. Use of at least one at least positive-locking coupling (20, 30, 40) for the at least positive-locking coupling of at least two axial sections (11, 12, 13) of a shaft device (10) of a drive train of an elevator installation (100), wherein the shaft device (10), in a functional design as a common shaft, has a first axial section (11) with a first diameter (Dl 1) and at least one further axial section with at least one further diameter, wherein the first axial section (11) defines a drive zone (TI 1) of the shaft device (10), wherein the at least one further axial section defines a drive zone or a braking zone;wherein the first axial section (11) and at least one further axial section are provided as shaft sections which can be separated from one another by means of the at least one at least positive coupling (20, 30) and which are coupled to one another in a rotationally fixed manner, wherein a diameter variation from the first diameter (Dl 1) to the corresponding further diameter is ensured by means of at least one coupling component (21, 22, 31, 32) of the at least one at least positive coupling, in particular by at least one positive coupling component being provided on the end face and at least one positive coupling component being provided on the circumference, wherein coupling components of adjacent axial sections of the common shaft are provided in the region of a shaft shoulder formed at the interface between the axial sections due to the different diameters.; 17. Use of at least one at least positive coupling (20, 30, 40) for the at least positive coupling of at least two axial sections (11, 12, 13) of a shaft device (10) of a drive train of an elevator installation (100), wherein the shaft device (10) in functional design as a common shaft has a first axial section (11) with a first diameter (Dl 1) and at least one further axial section with at least one further diameter, wherein the first axial section (11) defines a drive zone (TI 1) of the shaft device (10), wherein the at least one further axial section each defines a drive zone or a braking zone defined; wherein the first axial section (11) and at least one further axial section are provided as shaft sections separable from one another by means of the at least one at least positive coupling (20, 30), which are rotatably coupled to one another, wherein a diameter variation from the first diameter (Dl 1) to the corresponding further diameter is ensured by means of at least one coupling component (21, 22, 31, 32) of the at least one at least positive coupling, wherein the at least one coupling component comprises at least one coupling disc configured to connect respectively adjacent axial sections and configured to bridge the diameter variation between the respectively adjacent axial sections,wherein coupling components of adjacent axial sections of the common shaft are provided in the region of a shaft shoulder formed at the interface between the axial sections due to the different diameters., 18. Use of at least one at least positive-locking coupling (20, 30, 40) for the at least positive-locking coupling of at least two axial sections (11, 12, 13) of a shaft device (10) of a drive train of an elevator installation (100), wherein the shaft device (10), in a functional design as a common shaft, has a first axial section (11) with a first diameter (Dl 1) and at least one further axial section with at least one further diameter, wherein the first axial section (11) defines a drive zone (TI 1) of the shaft device (10), wherein the at least one further axial section defines a drive zone or a braking zone;wherein the first axial section (11) and at least one further axial section are provided as shaft sections by means of the at least one at least positive coupling (20, 30) so as to be separable from one another, which shaft sections can be coupled / coupled to one another in a rotationally fixed manner, wherein by means of at least one coupling component (21, 22, 31, 32) of the at least one at least positive coupling a / the diameter variation from the first diameter (Dl 1) to the corresponding further diameter is ensured, wherein the shaft device comprises at least one coupling element configured for transmitting axial force and for holding the adjacent axial sections in position, which coupling element interacts with the at least one coupling component on the corresponding axial sections, wherein coupling; Components of adjacent axial sections of the common shaft are provided in the area of a shaft shoulder formed at the interface between the axial sections due to the different diameters.

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