Drive train arrangement for drive unit of elevator system and corresponding shaft and use thereof

Abstract

The invention provides an improved drive train arrangement, in particular for a drive unit of an elevator system, in which the drive unit comprises at least one belt drive, a shaft being mounted in a housing in a fixed bearing and in a movable bearing; the fixed bearings can be fixed to the shaft in an axially fixed manner at a number of circumferential positions without bearing covers by means of at least one disc interacting with the housing. Advantageously, a reservoir is disposed between the bearing and the brake unit to receive bearing grease. Advantageously, the inner diameter of the fixed bearing is smaller or larger than the inner diameter of the movable bearing, so that the bearing with the larger inner diameter can be arranged on the shaft for the bearing with the smaller inner diameter in the axial assembly direction. This simplifies the assembly and implementation of the drive, in particular at least one drive zone incorporated between the bearings and arranged on the shaft, and optimizes the operation of the drive.

Description

Technical Field

[0001] The invention relates to a drive train device for a drive unit, in particular a belt drive unit, of an elevator system, the drive train device having a shaft mounted in a housing in at least two bearings, in particular in a fixed bearing and a movable bearing; wherein at least one component of at least one bearing can be fixed to the shaft in an advantageous manner without a bearing cover. The invention also relates to an improvement of such a drive train device, the effect of which is that the function of the brake unit can be improved by a reservoir for receiving bearing grease or a similar lubricant. The invention also relates to an improvement of such a drive train device, the effect of which is that the inner diameters of the bearings are dimensioned in dependence on one another, so that in the axial mounting direction, the bearing with the larger inner diameter can be applied by a shaft section provided for the bearing with the smaller inner diameter. In this respect, the invention relates to the arrangement and functional integration of the shaft in the drive train and the optimization of the support / mounting. Furthermore, the invention also relates to the use of a correspondingly designed shaft, in particular in a drive train of an elevator system. More specifically, the invention relates to a device according to the preamble of the respective independent claim. Background Art

[0002] In traction machines for elevator systems, among other things, material efficiency and space-saving design are of interest; this also applies to traction machines with belt drives. A belt drive for elevator systems has a shaft, which is mounted in a housing and has a drive zone, via which a belt is guided and torque is transmitted through the shaft. The shaft is mounted or supported in bearings on both sides of the drive zone. A suitable design of the drive train must be determined individually, on the one hand with regard to the installation and assembly of the shaft and on the other hand also with regard to material usage and space requirements, both in general and for specific applications. The belts used / available are predetermined in particular by performance parameters, so that the designer's task is, among other things, to design the drive zone for different power levels or different drive trains, which are either in a manner that is as scalable as possible or provide design guidelines that are as generally valid as possible, so that the above requirements are met as cooperatively as possible.

[0003] According to the prior art, shafts are provided as standard in a more or less standardized configuration for functional integration and installation in a drive train. As a result, there is an interest in an improved design and integration of shafts in a drive train, i.e. a technological teaching which allows an optimized design of the shaft and the components interacting therewith, in particular in the area of ​​the drive zone and in connection with the installation of the shaft.

[0004] The following publications describe shafts with an axial securing device engaging on the shaft: DE 10 2021003 240 A1, US Pat. No. 4,482,194 A.

[0005] Starting from the prior art, there is a need for further design optimization of belt-driven drive trains of elevator systems, in particular with regard to the installation and functional integration of shafts in the drive train. In particular, there is also interest in technical teachings that can be used as scalably as possible for the (design) optimization of those sections of the drive train that interact with the shafts, especially with regard to potential savings in resources for the design. Summary of the invention

[0006] The object of the invention is to provide a drive train arrangement for a drive unit of an elevator system, wherein an advantageous design and configuration of the bearings, the shaft and the housing receiving the shaft allows an advantageous symbiosis of the requirements with regard to installation, assembly, lubrication and an active braking function, which is optionally implemented on the shaft, in particular also in an optimized combination with a drive unit comprising at least one belt drive. Another object is to design the drive train arrangement such that the shaft can be optimized not only with regard to installation and mounting in a simple manner, but also with regard to operating conditions or operating parameters, in particular with regard to bearing lubrication and the optional braking function. It is also important to design the shaft of such a drive train arrangement such that, by means of the simplest possible installation of the shaft, during subsequent (long-term) operation, lubrication can be ensured with high reliability with regard to an optimized bearing function, either independently of the braking function or in combination with the braking function.

[0007] This object is achieved by a drive train device according to claim 1 or according to other independent device claims and by a use according to other independent use claims. Advantageous developments of the invention are explained in the corresponding dependent claims. Unless explicitly stated otherwise, the features of the exemplary embodiments described below can be combined with one another. The invention is based on several aspects, which can also (but not necessarily) be realized in combination with one another; all of these aspects contribute to the object of the invention, at least to some extent, by designing the individual components of the drive train to be as slender as possible, in particular by uniformly proposing measures related to the mounting or bearings of the shaft and the components connected thereto.

[0008] A drive train arrangement for a drive unit / belt drive unit of an elevator system is provided, which has a shaft mounted in a housing in at least two bearings, in particular in a fixed bearing and a movable bearing.

[0009] According to the invention, at least one component of at least one bearing, in particular a bearing ring, in particular a fixed bearing or a corresponding component of a fixed bearing, is fixed to the shaft in an axially fixed manner without a bearing cap at a plurality of circumferential positions by means of at least one washer interacting with the housing. This makes the use of a bearing cap superfluous and allows a relatively slender design.

[0010] The invention is also based on the concept of using the housing as extensively as possible in order to position or fix the individual components relative to each other, if possible without expensive additional components besides the housing. In other words, the invention teaches the use of standard cost-neutral (non-obvious) mounting aids, such as flat washers, instead of specific bearing caps, in order to avoid the relatively expensive manufacture of the bearing caps.

[0011] The washers described here, for example in the configuration of a flat washer (or its corresponding arrangement), in particular in a classic fixed / movable bearing arrangement, can fix a fixed bearing in a housing in a very advantageous manner. Conventionally, fixed bearings are fixed by means of a bearing cover; in many applications, this bearing cover is either provided as a solid turned part or as a round metal plate, i.e. as a separately provided part. In contrast, the present invention makes it possible to fix the bearing in question only by washers, which are widely available and do not require a separate design, for example, which rest on the outer ring of the bearing or are in contact with the outer ring of the bearing on the one hand and are in contact with the housing on the other hand. For example, the washers are axially fixed by fixing them from the outside on the end face of the housing and preloading them by screws, which can also be fixed by conventional means (e.g. by adhesive, lock washers or similar equivalent means) to prevent accidental loosening. The bearing seat can also be designed so that the bearing protrusion is minimal and the corresponding washers can fix the bearing by a certain installation preload force; in this regard, the inherent stress of the washers (elasticity or material thickness) can also ensure preload and a secure axial sealing seat. The sealing of the drive train or housing is not a function of the gasket; instead, an already sealed bearing can be advantageously used. In this respect, the gasket essentially provides the axial fixation / preload (fixation of the bearing in question). It has been shown that the fixation concept according to the invention can also be preferably implemented in all mounting situations of the bearing described here in which a sealed bearing is provided or can be used, even if a sealed bearing is not required at all.

[0012] From the prior art, a mounting method is known in which the bearing cap is not yet mounted during this period, but after the bearing is mounted, interacts with the bearing inner ring and is mounted on the shaft by means of a screw connection in order to transmit axial forces and cover the end face. In contrast, the device according to the invention no longer requires a bearing cap, but the fixing of the corresponding bearing component can be ensured by washers that can be fastened directly to the housing, for example by screwing three flat washers that act on the bearing outer ring to the housing. In other words: the corresponding end-face shaft end can remain open.

[0013] Advantageously, the invention can be implemented in a drive unit in the form of a belt drive unit in one embodiment. As described herein, the "(absolute) drive zone width" is to be understood as meaning in particular the contact surface or running surface that can be used by the (respective) belt acting around the shaft. In the case of a drive zone divided into at least two or three drive zone sections, the (absolute) drive zone width is also understood here to be the longitudinal section of the shaft that is constructively taken into account for the configuration of the shoulder or (central) web for guiding the respective belt; the (absolute) drive zone width thus consists of the width of the respective drive zone section and the width of the web or shoulder for guiding the belt (or at least their constructively intended minimum width, e.g. 10% of the width of the respective drive zone section, e.g. 5 mm per shoulder or web). Thus, in the case of two drive zone sections, the (absolute) drive zone width is obtained by the sum of the widths of the two drive zone sections, the width of the central web and the width of the two limiting shoulders. In this context, the term “drive zone width” is also to be understood as a constructive length specification for a length section of the shaft, in particular between two bearing sections, which is correspondingly constructively included to ensure the correct operation of the at least one belt.

[0014] A "drive train" is to be understood here as meaning in particular torque transmission components that interact with the motor, in particular with at least one belt of a belt drive unit, in particular also with a feather key and / or at least one toothing, usually a shaft-hub connection; depending on the configuration of shafts and bearings and the required mounting sequence, the drive train may also include bearing components or all bearings. By definition, a drive train may also include a motor or a drive of a belt drive unit.

[0015] A "shoulder" is to be understood here as a lateral boundary of the entire drive region, which is preferably designed integrally on the shaft as a "(shaft) shoulder" or can alternatively also be connected to the shaft via an additional washer (connection element) (compare in this respect a flange pulley in a standard belt drive). Unless expressly stated otherwise here, the shoulder is preferably formed integrally on the shaft, i.e. formed by machining of the material on the shaft.

[0016] A "web" is to be understood here as a projection which divides the drive zone into separate drive zone sections, in particular for coupling with a plurality of belts, each of which is intended to run separately from one another on only one of the drive zone sections due to the web. Furthermore, unless expressly stated otherwise herein, the corresponding web is preferably formed integrally on the shaft, i.e. a "(shaft) web".

[0017] The shoulders and webs described here may also fulfil the function of providing an abutment / stop / rolling surface for the belt holding-down unit.

[0018] By "(absolute) band width" here I mean the cumulative width of the bands used, i.e., for example, three bands are three times as wide as a single band (assuming all bands are exactly the same width).

[0019] A "belt drive unit" is to be understood here as meaning in particular a traction machine, by means of which forces can be transmitted from a motor to at least one traction device designed as a belt, the belt drive unit being designed to receive, mount and support a shaft interacting with the at least one traction device. Although a shaft can also be considered as part of the belt drive unit, according to one of the exemplary embodiments, the belt drive unit is designed to receive different shafts (e.g. depending on the power level or depending on a predetermined or required number of belts), so that the belt drive unit can also be provided without a shaft. The belt drive unit comprises at least a housing which receives or at least holds the shaft and the motor or the drive.

[0020] The "drive zone diameter" here is the maximum diameter of the circumferential surface of the drive zone or the corresponding drive zone segment (in the case of multiple belts), which belt interacts with the shaft as intended. Usually, the circumferential surface of the drive zone is not strictly cylindrical, but slightly spherical (centering function of the belt); therefore, the diameter that usually characterizes the maximum diameter in the central area of ​​the drive zone or the corresponding drive zone segment should be understood here as the drive zone diameter.

[0021] In the context of this disclosure, anthropomorphic terms (unless used herein in a gender-neutral manner) may apply to all genders.Any English expressions or abbreviations used herein are industry standard expressions in the art and are familiar to those skilled in the art.

[0022] According to an exemplary embodiment, at least one component of at least one bearing, in particular a bearing ring, in particular a fixed bearing or a bearing ring of a fixed bearing, respectively, is fixed in a plurality of circumferential positions by fixing at least one washer to the housing, in particular the washer is arranged in radial overlap between the housing and the outer ring of the bearing in question. This facilitates assembly and good accessibility and allows the fastening device to be arranged in a favorable (non-interfering) area of ​​the housing.

[0023] According to an exemplary embodiment, at least one washer in a plurality of circumferential positions respectively bears against the outer ring of the bearing in question, in particular a fixed bearing. This also allows the axial fixing force to be applied and transmitted directly from the fastening means, in particular a screw, to the bearing.

[0024] According to an exemplary embodiment, the washers are evenly and symmetrically distributed in the circumferential direction, in particular at at least three circumferential positions. This is also conducive to the most uniform force distribution, and thus also conducive to the most accurate arrangement of the corresponding bearing.

[0025] According to an exemplary embodiment, at least one washer arranged at a corresponding circumferential position is fixed by means of a screw or an equivalent fastening means, in particular such that the corresponding screw is at least approximately parallel to the shaft and axially aligned outside the housing. In addition to the advantageous force flux path, this arrangement also facilitates good accessibility.

[0026] According to an exemplary embodiment, at least three holes or similar cutouts are formed in the end face section of the housing, which are preferably evenly distributed in the circumferential direction and are used to receive fastening means, in particular screws, of the fixing washers in which the bearing in question, in particular the fixed bearing, is mounted. This means that the corresponding fastening positions can also be clearly predetermined or obviously predetermined for the fitter.

[0027] According to an exemplary embodiment, in the end face section of the housing in which the bearing (in particular the fixed bearing) is mounted, the shaft ends at the end face end (at least approximately flush with / the same radial plane) and seals the corresponding housing feed-through together with the bearing. This also provides an elegant housing end, which is designed to be as slender as possible.

[0028] Advantageously, a drive train device is provided, in particular for a drive unit / belt drive unit of an elevator system, the configuration of which has a shaft mounted in a housing in at least two bearings, in particular a fixed bearing and a movable bearing, and a brake unit acting on the shaft, wherein the drive train device has a reservoir arranged between the bearing and the brake unit and designed to receive bearing grease, wherein the arrangement and configuration of the reservoir, in particular integrally on the housing, is such that the bearing grease is driven into the reservoir from an adjacent bearing or from at least two bearings by centrifugal force; in particular a drive train device comprising the features of the drive train device described herein. In this regard, in the context of the invention, it is also proposed to take precautions for the housing in order to ensure that not only the most accurate possible bearing seat or the correct bearing position can be well determined, but also that long-term operation can be ensured with a minimum of maintenance work, in particular by at least partially self-maintaining / self-adjusting operation. This also further optimizes the entire drive train configuration, so that the installation can be optimized in terms of design and operation by relatively simple but synergistic measures.

[0029] The brake unit (or at least a brake disc) is connected to the shaft for common rotation, for example in a splined section at the end of the shaft near one of the bearings, and may interact with an end face of the housing.

[0030] The invention is also based on the concept that the shaft has to be further processed as little as possible and at least some of the intended range of functions can also be integrated in the housing. In other words, the invention envisages an interaction of housing and shaft not only with regard to the type and manner of mounting, but also with regard to individual operating functions including at least lubrication, in particular with regard to the axial position of the shaft in front of the brake unit.

[0031] The leaking grease does not need to be drained; instead, the reservoir can be dimensioned in such a way that the grease contained in the bearing (or the maximum possible amount that can escape) can (can) be completely received in the reservoir and in particular cannot (cannot) reach the brake unit. Provision is made for the grease / oil to be driven radially outwards by centrifugal force and to collect at the bottom of the reservoir driven by gravity, i.e. to flow along the circumferential surface of the reservoir; further use of the lubricating medium can be selectively (optionally) provided from this lowest point relative to the direction of gravity.

[0032] For example, the grease reservoir has a circular segment shape, in particular a semicircular cross-sectional shape (in particular an annular design) in the radially outer region. In this case, the relative position with respect to the brake unit can be selected to prevent grease / oil from reaching the brake disc or the sections interacting therewith. The grease reservoir can be provided on all existing bearings; the most efficient arrangement is between the brake-side bearing and the brake. In this respect, it is sufficient if the grease reservoir is arranged only on one axial side.

[0033] The invention also enables the most cost-effective, material-efficient and sustainable installation and the lubrication required for this purpose, wherein a relatively safe function of the brake unit can also be ensured (in particular without the need to take further measures).

[0034] According to an exemplary embodiment, the reservoir is arranged integrally on the housing, in particular is formed / configured solely by the housing. This promotes functional decoupling from the shaft and can further optimize the design of the shaft.

[0035] According to an exemplary embodiment, the reservoir is designed in an annular manner with a circular arc segment or ellipse segment cross-sectional shape and is arranged to extend radially outward at least beyond the radial extent of the adjacent bearing, so that when the shaft rotates (i.e. is subjected to corresponding centrifugal forces), the bearing grease escaping from at least one bearing is driven radially outward into the reservoir. Not only that, this can also ensure a good collection and preservation function.

[0036] According to an exemplary embodiment, the reservoir is arranged on a housing end face which is provided in a first axial section adjacent to the housing end face for arranging the brake disk. This contributes to a smooth interaction of lubrication measures and braking function.

[0037] According to an exemplary embodiment, the reservoir (when the bearing / shaft is mounted as intended) is arranged between the bearing and the brake unit, axially directly adjacent to one of the bearings and axially directly adjacent to the brake unit. This relative position has proven to be particularly effective.

[0038] According to an exemplary embodiment, the lowest point of the reservoir is arranged radially at least 5%, preferably at least 10%, further outward relative to the radius of the outer ring of the adjacent bearing. This facilitates the self-regulating effect described herein with respect to lubricant removal, in particular to avoid contamination of the brake unit.

[0039] According to an exemplary embodiment, at least one drive zone for at least one belt of the drive unit is formed on the shaft, wherein the at least one drive zone is arranged between the bearings. The reservoir can also ensure that the belt is protected from the lubrication medium.

[0040] According to an exemplary embodiment, the reservoir (when the bearing / shaft is mounted as intended) is arranged between the fixed bearing and the brake unit (in addition to the axial ring or similar bearing seat section), in particular axially directly adjacent to the fixed bearing, axially directly adjacent to the brake unit. This also facilitates particularly effective reception of lubricant.

[0041] According to an exemplary embodiment, a felt ring or similar lubricant collecting element is arranged in the arrangement between the reservoir and the bearing inner ring, in particular in order to fill the axial section therebetween. This can also further increase the effectiveness of the reservoir arrangement.

[0042] Advantageously, a drive train arrangement is provided, in particular for a drive unit of an elevator system, the elevator system comprising at least one belt drive, the shaft of which is mounted in a housing in at least two bearings, in particular a fixed bearing and a movable bearing, wherein at least one drive zone for at least one belt of the drive unit is formed on the shaft between the bearings; wherein the inner diameter of the fixed bearing is smaller or larger than the inner diameter of the movable bearing and differs from the inner diameter of the other bearing, so that in the axial installation direction, the bearing with the larger inner diameter can be applied (slidable, mountable), in particular without contact, via the shaft section provided for the bearing with the smaller inner diameter; in particular a drive train arrangement comprising the features of the drive train arrangement described herein. The outer diameters of the bearings can also differ from each other, thereby simplifying the installation of the shaft in the housing, the bearings being preassembled on the shaft, in particular at least approximately similar to the diameter variation described here using the example of the inner diameter. In addition to this, the size of the individual bearings can also vary in such a way that the inner diameter differs from the inner diameter of the other bearing to a greater or lesser extent than the outer diameter (for example, due to bearing rings or balls or rolling bodies of different thicknesses). In this way, an optimal solution can be found for the respective interface (on the one hand, the shaft and on the other hand, the housing). A person skilled in the art can take note of these variant possibilities and implement them in an application-specific manner. In this regard, it is also proposed within the scope of the invention to take measures with regard to the dimensions of the bearing seat in order to be able to further optimize the installation, in particular to facilitate the installation. Thus, the invention teaches that even with relatively symmetrical bearing loads in the two bearing sections, the dimensions can be different, in particular the shaft does not require too much machining and is not too large in relation to the rated load of the corresponding bearing used.

[0043] The invention is also based on the concept that bearings of different sizes are only realized with a dimensional variation if this does not lead to oversizing according to the expected predominantly uniformly distributed loads, but nevertheless ensure the installation advantages that can be achieved with different bearing sizes. In other words, the two bearing sizes, although different, are as close or adjusted as possible (i.e., in a sense, they are also as standardized as possible).

[0044] In classical electric motors, the shaft loads at the (two) bearings vary relatively greatly; in particular, in classical electric motors, the shaft loads on the output side are usually much higher than on the avoidance side. In particular in the case of drives for elevator systems (elevator systems), very high shaft loads are usually assumed, but are essentially evenly distributed (at least in the case of belt drives); conventionally, a symmetrical design of the shaft relative to the drive region has been achieved so far, which leads to comparable loads at the corresponding bearings. In particular in this case, the present invention makes it possible to find the best solution for realizing bearings that are as similar as possible in terms of size and rated load, but still different. The corresponding bearing diameter can also be selected or predetermined in such a way that the shaft has to be (re)machined as little as possible and does not have to be oversized in terms of rated load. In particular, this also offers cost advantages. Bearing arrangements without bearing caps can also be realized (regardless of the individually selected / optimized bearing diameter).

[0045] According to an exemplary embodiment, the inner diameters of the bearings differ from each other (only) so that remachining of the shaft is / can be minimized. This design approach helps to take into account the fact that large diameter variations are associated with disadvantageously high costs for machining material.

[0046] According to an exemplary embodiment, the inner diameters of the bearings differ from one another so that in the axial mounting direction, the bearing with the larger inner diameter can be applied (slidable, mountable) via the shaft section configured as at least one drive zone, in particular in at least two or three drive zones predetermined by the shaping of the shaft. This also facilitates, among other things, a very advantageous mounting.

[0047] According to an exemplary embodiment, the inner diameter of the fixed bearing is smaller than the inner diameter of the movable bearing.This configuration or this size distribution has proven to be advantageous, in particular for the belt drive unit described here.

[0048] According to an exemplary embodiment, a smaller bearing is arranged between the drive region and the brake unit acting around the shaft. In particular, this also contributes to a favorable installation situation.

[0049] The drive unit described here is preferably designed as a belt drive unit having at least one belt engaged on at least one drive zone of the shaft, preferably having at least two or three drive zones and a corresponding number of belts.

[0050] The abovementioned object is also achieved by an elevator system having at least one drive unit as described herein.

[0051] The aspects of the invention described here can be realized individually or in combination with one another. In this respect, the above-mentioned object is also achieved by using a shaft, which can be mounted in a housing in at least two bearings, in particular a fixed bearing and a movable bearing, for coupling a drive component of a drive train arrangement of an elevator system, in particular for coupling at least one belt of a drive unit / belt drive unit to at least one component to be driven of an elevator system, wherein at least one component of at least one bearing, in particular the fixed bearing, is fixed to the shaft in an axially fixed manner without a bearing cap at a plurality of circumferential positions, respectively, by at least one washer interacting with the housing, wherein the shaft has at least one of the following features: in particular in combination with one another: the housing has a reservoir arranged between the bearing and a spline section of the shaft and designed to receive bearing grease (when the bearing / shaft is mounted as intended), the spline section being used for the brake unit, and / or wherein the inner diameter of the fixed bearing is smaller or larger than the inner diameter of the movable bearing; in particular the use of the shaft in a drive train arrangement as described here. This enables the above-mentioned advantages to be achieved, in particular with regard to the installation situation of the drive unit and the method of (long-term) operation.

[0052] The above-mentioned object is therefore also achieved by the drive train arrangement described here, which is produced by dimensioning and arranging the shaft and the housing so that the washer which fixes the corresponding bearing in an axially fixed manner bears against the end face of the housing and forms a reservoir for receiving the bearing grease by a material depression, at least against the housing (and optionally also against the shaft in the corresponding axial section), and optionally additionally also by material removal machining of the shaft section provided for the bearing with a smaller inner diameter. This allows the above-mentioned advantages to be achieved, in particular with regard to optimizing the installation design of the shaft.

[0053] Abstract: The invention provides an improved drive train device, in particular a drive unit for an elevator system, wherein the drive unit comprises at least one belt drive device having a shaft mounted in a housing in a fixed bearing and a movable bearing; in this case, the fixed bearing can be fixed in an axially fixed manner at a plurality of circumferential positions on the shaft by at least one washer interacting with the housing, without the need for a bearing cover. Advantageously, the reservoir is arranged between the bearing and the brake unit of the drive train device and is designed to receive bearing grease. Advantageously, the inner diameter of the fixed bearing is smaller or larger than the inner diameter of the movable bearing, so that in the axial mounting direction, the bearing with the larger inner diameter can be applied by means of a shaft section provided for the bearing with the smaller inner diameter. This facilitates the installation and implementation of the drive, in particular in combination with at least one drive zone provided on the shaft between the bearings, and the operation of the drive is optimized. The features and aspects described herein can also be advantageously combined with one another, each aspect itself already providing the advantages described here in a corresponding manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The present invention will be described in more detail in the following drawings, wherein for reference symbols not explicitly described in the drawings, please refer to other drawings in the drawings. In the drawings:

[0055] Figure 1 , Figure 2 , Figure 3 Each shows a shaft configured for a drive train device according to an exemplary embodiment in a perspective side view;

[0056] Figure 4 A shaft configured for a drive train device according to an exemplary embodiment is shown in a cross-sectional side view;

[0057] Figure 5 A schematic diagram shows a drive train arrangement coupled to an elevator system according to an exemplary embodiment;

[0058] Fig. 6A , Figure 6B Each shows a belt drive unit with a shaft or a drive train arrangement according to an exemplary embodiment in a perspective side view;

[0059] Figure 7 A belt drive unit configured for a drive train device, in particular for an elevator system, is shown in a perspective view according to an exemplary embodiment;

[0060] Fig. 8A , Figure 8B Each shows a shaft of a drive train arrangement installed in a housing according to an exemplary embodiment in a side view;

[0061] Fig. 9 A schematic diagram, partially in section, shows a shaft configured for a drive train arrangement according to an exemplary embodiment. DETAILED DESCRIPTION

[0062] First, the invention will be generally explained with reference to all reference symbols and drawings. Specific features or single aspects of the invention that are clearly visible / presented in the corresponding drawings will be discussed separately in conjunction with the corresponding drawings.

[0063] A drive train arrangement 10 for a belt drive unit (traction machine) 20, in particular for driving an elevator car 1 of an elevator system 100, is provided, wherein a drive 23 has been coupled to at least one belt 21 via a shaft 13. The shaft 13 is mounted in a housing 19 in a first bearing section 13.1 and a second bearing section 13.2 in a first bearing 11, in particular a fixed bearing, and a second bearing 12, in particular a movable bearing, wherein the at least one belt 21 is guided in a drive zone 13.4, which optionally comprises a plurality of sections 13.5, each defined by at least one shoulder 13.3 or by a web 13.3a. A spline section 13.6, in particular a rotational coupling for a component of a brake unit 17, may be provided at one of the shaft ends, and a feather key section 13.7 or a similar rotational coupling relative to a rotor of the drive 23 may be provided at the other shaft end.

[0064] The following reference symbols detail individual designations relating to dimensions or positions, with reference being made to the radial direction (r) and the longitudinal direction (axial direction) x:

[0065] B13 Width or length surface segment between bearing seat / bearing surfaces (absolute); B13.3 Width of a single shoulder; b13.3a Width of a single center web; B13.4 Absolute drive zone width, including all drive zone segments and web / shoulder used to define; b13.5 Width of a single drive zone segment (average ratio of web / shoulder); b21 Width of a single belt, B21 Absolute belt width of all belts used;

[0066] The shaft diameter D0 of the first end of the shaft (in particular in the spline section); the shaft diameter D1 of the first bearing section, in particular the shaft diameter directly adjacent to the drive zone, excluding a shoulder; the (first) shoulder diameter D2 (or the shaft diameter in the area of ​​the first shoulder); the drive zone diameter D3 (or the shaft diameter in the area of ​​the drive zone); the (center) web diameter D4 (or the shaft diameter in the area of ​​the web); the (second) shoulder diameter D5 (or the shaft diameter in the area of ​​the second shoulder); the shaft diameter D6 of the second bearing section, in particular the shaft diameter directly adjacent to the drive zone, excluding a shoulder; the shaft diameter D7 of the second shaft end (in particular in the key section, rotor coupling section); the absolute length of the shaft is referred to here as L13.

[0067] It is worth noting that according to the invention, the respective (shaft) shoulder 13.3 is in the form of a one-sided split step for limiting the movement of the band (axial freedom of movement), and the (shaft) web 13.3a is constructed as a central web, that is, acts on both sides in a split manner, thus also providing an axial stop for the two respective bands (in this respect, the conceptual difference chosen here is also understandable). Optionally, an axial boundary 13.8 of the key segment can also be provided, in particular by a shoulder step, which, however, can be in the form of a much flatter shoulder than the shoulder described here for defining the drive zone.

[0068] A guide, blend or guide plate 19.9 of this type can be provided on the housing for neat coupling in and out of the belt(s).

[0069] Hereinafter, specific features of the present invention will be explained with reference to the various drawings or exemplary embodiments.

[0070] Figure 1 A first type of shaft (belt not shown) having features according to the invention is shown; the drive zone 13.4 has two drive zone sections 13.5 separated from each other by a web 13.3a.

[0071] Figure 2 A second type of shaft is shown (without the belt being shown) having features according to the invention; the drive zone 13.4 has three drive zone sections 13.5.

[0072] Figure 3 A third type of shaft (without showing) having features according to the invention is shown; the drive zone 13.4 has three drive zone sections 13.5. This type is similar to Figure 2 The type shown differs slightly in the design of the shoulder 13.3 and the bearing section 13.2 between the feather key section 13.7 and the drive region 13.4.

[0073] Figure 4 A shaft with features according to the invention is shown with bands 21 abutting against each other in the drive zone, with individual details regarding size and position explained in detail. Figure 4 It is emphasized that, assuming that the used tapes are of the same width, in the case where two tapes are used (as provided herein), the absolute tape width B21 corresponds to double the single tape width b21 (B21=2xb21).

[0074] Figure 5 The interaction between the elevator car 1 and the drive train arrangement 10 is generally schematically shown. The shafts described here are installed in the drive train arrangement 10. The positional relationship of the components shown is intentionally not specified here; in this respect, a person skilled in the art can provide implementations for specific applications.

[0075] Fig. 6A The belt drive unit 20 is shown on the side of the motor 23; Figure 6B In the figure, the opposite side provided for arranging the brake unit 17 is visible. As can be seen from Fig. 6, the drive area is mostly arranged in the center and the entire belt drive unit 20 is relatively compact.

[0076] exist Figure 7 As can be seen in the figure, the bearing or its bearing ring 11.1 can advantageously be held by three washers 16, which can be clamped between the housing and the bearing ring by means of screws 18 axially fixed on the housing 19. On the housing, corresponding (threaded) holes 19.1 are formed in the abutment sections provided for the washers, in particular concentrically around the housing feed-through 19.3 of the shaft 13. A braking surface section 19.2 for interaction with a braking unit (not shown) can also be formed on the same end face. In this respect, the fastening device 18 can also be recessed below said braking plane 19.2; the housing provides a corresponding recess for this purpose.

[0077] Fig. 8A and Figure 8B Details of an advantageous relative arrangement of the reservoir 15 are shown. Fig. 8A An advantageous arrangement is shown with a reservoir 15 formed integrally in the housing 19 , in particular a step directly abutting axially against the outer ring of the bearing 11 in question. Figure 8B Shown in detail Fig. 8A The reservoir 15 is arranged directly adjacent to the brake unit 17, axially adjacent to the brake unit and optionally to the brake disc interacting with the housing, i.e. particularly effectively protecting said brake disc from lubricating medium (oil / grease) escaping from the bearing. In this example, the contour C15 or cross-sectional shape of the reservoir 15 is advantageously (at least approximately) semicircular, a groove or an additional depression may also be provided at the lowest point R15 in the sense of a predetermined collection point for the lubricating medium.

[0078] Figure 8B Also shown in detail is a felt ring 14 or a similar collecting / receiving element, which is arranged between the reservoir 15 and the bearing inner ring 11.2, in particular in order to fill the axial section therebetween. In this way, the operation of the reservoir 15 can be predetermined more precisely: the oil / lubricating medium is stopped axially in the region of the shaft and must therefore flow through the reservoir along an axial path, i.e. not along the circumferential surface of the shaft in the axial direction towards the brake. Such an arrangement of the felt ring (or an equivalent fluid receiving element) can further increase the effectiveness of the reservoir and protect the brake unit more effectively.

[0079] Fig. 9The basic structure of the shaft 13 described here is shown in a schematic diagram; the bearing sections for the two bearings 11, 12 are different in diameter, and the outer diameter of the bearing (or the corresponding diameter in the housing) can also be designed to match the size. Optionally, the fixed bearing 11 is smaller in diameter than the movable bearing 12, but larger than the movable bearing 12 in terms of bearing rings and rolling elements.

[0080] Reference numerals list

[0081] 1 Elevator Car

[0082] 10 Drivetrain

[0083] 11. First bearing, especially sealed or self-sealing fixed bearing

[0084] 11.1 Outer ring of fixed bearing

[0085] 11.2 Fixed bearing inner ring

[0086] 12 Second bearing, especially movable bearing

[0087] 13 Axis

[0088] 13.1 First bearing section

[0089] 13.2 Second bearing section

[0090] 13.3 Shoulders, especially those limited on one side

[0091] 13.3a The (axial) web configured as a central web is limited on both sides

[0092] 13.4 Drive Zone, Optionally Comprising Multiple Segments

[0093] 13.5 Single drive section, defined by web or shoulder

[0094] 13.6 Splined sections, especially for brake units

[0095] 13.7 Feather key section (connected to the rotor for joint rotation)

[0096] 13.8 Axial limitation of the feather key section, in particular by means of a shoulder step

[0097] 14 Felt ring or similar collecting / receiving element

[0098] 15 Storage

[0099] 16 Washers used to fix bearings, especially flat washers

[0100] 17 Braking unit, in particular with a brake disc

[0101] 18(Multiple) Washer Fastening Methods

[0102] 19 Shell

[0103] 19.1 Abutment surface or fastening section of the housing end face

[0104] 19.2 Braking surface sections

[0105] 19.3 Housing feed-through for shaft

[0106] 19.9 Guides, partitions, guide plates

[0107] 20 belt drive unit (traction machine)

[0108] 21 belts

[0109] 23 Motor, driver

[0110] 100 Elevator System

[0111] B13 Width or length surface segment between housing / bearing surfaces (absolute)

[0112] b13.3 Shoulder width

[0113] b13.3a Width of a single center web

[0114] B13.4 (absolute) drive area width

[0115] b13.5 Width of a single drive section

[0116] b21 Width of a single band

[0117] B21 (absolute) belt width

[0118] C15 Reservoir profile or cross-sectional shape

[0119] D0 Shaft diameter at the first end (especially the spline section)

[0120] D1 Shaft diameter of the first bearing section or inner diameter of the first bearing

[0121] D2 (first) shoulder diameter (shaft diameter in the area of ​​the first shoulder)

[0122] D3 drive zone diameter (axial diameter of the drive zone area)

[0123] D4 (center) web diameter (axial diameter of the web area)

[0124] D5 (second) shoulder diameter (shaft diameter in the area of ​​the second shoulder)

[0125] D6 Shaft diameter of the second bearing section or inner diameter of the second bearing

[0126] D7 Shaft diameter at the second end (especially the feather key section, rotor coupling)

[0127] L13 Absolute length of the axis

[0128] R15 The lowest point of the reservoir (radially farthest on the outside).

Claims

1. A drive train arrangement (10) for a drive unit / belt drive unit (20) of an elevator system (100), comprising a shaft (13) mounted in at least two bearings (11, 12) in a housing (19); It is characterized in that At least one component of at least one of the bearings (11, 12) is fixed to the shaft (13) in an axially fixed manner at multiple circumferential locations without a bearing cover by means of at least one washer (16) interacting with the housing (19).

2. The transmission system device (10) according to claim 1, wherein: The at least one component of the at least one bearing is fixed in the plurality of circumferential positions respectively by fixing the at least one washer (16) to the housing (19), in particular by arranging the respective washers in radial overlapping relationship between the housing and the outer ring (11.1) of the bearing (11, 12) in question.

3. A drive train arrangement (10) according to any one of the preceding claims, wherein: The at least one washer (16) at the plurality of circumferential positions bears against the outer ring (11.1) of the bearing in question.

4. A drive train arrangement (10) according to any one of the preceding claims, wherein: The washers (16) are evenly and symmetrically distributed on the circumference, in particular distributed at at least three circumferential positions.

5. A drive train arrangement (10) according to any one of the preceding claims, wherein: The at least one washer arranged at a respective circumferential position is fixed by means of screws or equivalent fastening means (18), in particular such that the respective screws are at least approximately parallel to the axis and axially aligned outside the housing (19).

6. A drive train arrangement (10) according to any one of the preceding claims, wherein: At least three holes or similar cutouts are formed in the face section of the housing (19) in which the bearing in question is mounted, said holes or cutouts being preferably evenly distributed over the circumference and intended to receive fastening means (18), in particular screws, for fixing the washer.

7. A drive train arrangement (10) according to any one of the preceding claims, wherein: In the face section of the housing in which the bearing in question is mounted, the shaft terminates at a face end and seals a corresponding housing feedthrough (19.3) together with the bearing in question.

8. The drive train arrangement (10) according to any one of the preceding claims, comprising a brake unit (17) acting on the shaft, wherein: The drive train device has a reservoir (15) arranged between the bearing and the brake unit and designed to receive bearing grease, wherein the reservoir (15) is arranged and configured so that the bearing grease is driven from the bearing / adjacent bearings (11, 12) or from the at least two bearings into the reservoir (15) by centrifugal force.

9. The drive train arrangement (10) according to claim 8, wherein: The reservoir (15) is arranged integrally on the housing (19), in particular is formed / configured solely by the housing.

10. The drive train device (10) according to any one of claims 8 to 9, wherein: The reservoir (15) is designed in an annular manner with a circular arc segment or elliptical segment cross-sectional shape and is arranged to extend radially outward at least beyond the radial range of the adjacent bearing, so that when the shaft (13) rotates, the bearing grease escaping from at least one bearing is driven radially outward into the reservoir.

11. The drive train arrangement (10) according to any one of claims 8 to 10, wherein: The reservoir (15) is arranged on a housing end face, which is provided in the first axial section adjacent to the housing end face for arranging a brake disk.

12. The drive train arrangement (10) according to any one of claims 8 to 11, wherein: The reservoir is arranged between the bearings and the brake unit, axially directly adjacent to one of the bearings and axially directly adjacent to the brake unit (17).

13. The drive train arrangement (10) according to any one of claims 8 to 12, wherein: The lowest point (R15) of the reservoir is arranged radially at least 5%, preferably at least 10%, further outwardly relative to the radius of the outer ring of the adjacent bearing.

14. The drive train arrangement (10) according to any one of claims 8 to 13, wherein: At least one drive zone for at least one belt of the drive unit is formed on the shaft, wherein the at least one drive zone is arranged between the bearings.

15. The drive train arrangement (10) according to any one of claims 8 to 14, wherein: The reservoir is arranged between the fixed bearing (11) and the brake unit (17), in particular axially directly adjacent to the fixed bearing and axially directly adjacent to the brake unit.

16. The drive train arrangement (10) according to any one of claims 8 to 15, wherein: A felt ring (14) is arranged between the reservoir (15) and the bearing inner ring (11.2), in particular in order to fill the axial section therebetween.

17. A drive train arrangement (10) according to any one of the preceding claims, wherein: The drive unit (20) of the elevator system (100) comprises at least one belt drive, wherein at least one drive zone (13.4) for at least one belt of the drive unit is formed on the shaft between the bearings; wherein the inner diameter of a fixed bearing (11) of the bearings is smaller or larger than the inner diameter of a movable bearing (12) of the bearings and is different from the inner diameter of the other bearing, so that in the axial installation direction, the bearing with the larger inner diameter can be applied, in particular contactlessly, via the shaft section provided for the bearing with the smaller inner diameter.

18. The drive train arrangement (10) according to claim 17, wherein: The inner diameters of the bearings differ from one another so that remachining of the shaft is / can be minimized.

19. The drive train arrangement (10) according to any one of claims 17 and 18, wherein: The inner diameter of the fixed bearing is smaller than the inner diameter of the movable bearing.

20. The drive train arrangement (10) according to any one of claims 17 to 19, wherein: The smaller bearing is arranged between the drive region and the brake unit.

21. A drive unit (20) having a drive train arrangement (10) according to any one of the preceding claims, wherein: The drive unit is designed as a belt drive unit having at least one belt engaged on at least one drive zone (13.4) of the shaft, preferably having at least two or three drive zones and a corresponding number of belts.

22. An elevator system (100) having at least one drive unit (20) according to the preceding claim.

23. Use of a shaft (13) which can be mounted in at least two bearings (11, 12) in a housing (19) for coupling a drive component of a drive train device (10) according to any one of claims 1 to 19, in particular for coupling at least one belt of a drive unit / belt drive unit (20) to at least one component to be driven of the elevator system, wherein: At least one of the bearings, in particular at least one component of the fixed bearing, is fixed to the shaft in an axially fixed manner without a bearing cover at a plurality of circumferential positions by means of at least one washer (16) interacting with the housing (19), wherein the shaft (13) has at least one of the following features, in particular in combination with one another: the housing has a reservoir (15), which is arranged between the bearing and a spline section of the shaft (13) and is designed to receive bearing grease, the spline section being provided for a brake unit (17), and / or wherein the inner diameter of the fixed bearing (11) is smaller or larger than the inner diameter of the movable bearing.

24. A drive train device (10) according to any one of claims 1 to 19, which is produced by dimensioning and arranging the shaft (13) and the housing (19) so that the washer (16) that fixes the corresponding bearing (11, 12) in an axially fixed manner abuts against the end face of the housing (19), and is formed by a material depression of the reservoir (15) for receiving the bearing grease, and optionally additionally also abuts against the housing (19) by material removal processing of the shaft section provided for the bearing with a smaller inner diameter.

Images