Drive train assembly for belt drive unit of lifting system and correspondingly designed shaft and use thereof

Abstract

A favorable compromise between the required resources and the achievable technical (performance) data is required even when a drive train is designed for an elevator installation. In particular, in the case of a drive train with a belt drive, the shaft interacting with at least one belt in the drive zone requires structural optimization in order to be able to take advantage of improved potential, including other components of the drive train. According to the invention, the shaft has an absolute length of the shaft predetermined by determining a length dimension with reference to the width of the drive zone. In this way, a particularly advantageous compromise can be found on the basis of length dependence and optionally diameter dependence, in particular with respect to optimization of material processing expenses and minimum possible dimensions, on the basis of which a corresponding drive train can also be designed for different applications.

Description

Field of the Invention

[0001] The present invention relates to a drive train device with a drive unit for an elevator installation, having a shaft which is mounted in a housing and on which there is formed at least one drive region for a belt for interaction with the drive unit, wherein the drive region has a drive region width, and wherein the length of the shaft is dimensioned as a function of the drive region width. The invention also relates to a shaft designed accordingly and its use, and to an elevator installation equipped accordingly. In particular, the invention relates to a drive train device according to the preamble of the respective independent claims. Background of the Invention

[0002] In a traction machine for an elevator installation, among other things, a material-efficient and space-saving construction is also of interest; this is also the case for a traction machine with a belt drive. A belt drive for an elevator installation has a shaft which is mounted in a housing and has a drive region via which a belt is guided and torque is transmitted from the shaft. The shaft is mounted or supported in bearings on both sides of the drive region. Here, it is necessary to determine a correspondingly suitable construction of the drive train, on the one hand with regard to the arrangement and mounting of the shaft and, on the other hand, also with regard to material use and space requirements, both generally and for specific applications. The belt used / available is in particular predetermined by performance parameters, so that the task of the designer is in particular to design the shaft or the entire drive train in as scalable a manner as possible for different power levels or different applications in order to provide construction guidelines that are as generally applicable as possible and thus to meet the above requirements as synergistically as possible.

[0003] According to the prior art, a shaft with a drive region is provided as a standard arrangement in a more or less standardized configuration. On this basis, there is interest in improving the way in which the drive train is designed, that is to say, in the technical teaching, the configuration of the shaft can be optimized.

[0004] The published document US2002 / 0 100 902A1 describes variants of belt drives each having a plurality of belts which are guided one after the other around a shaft in, for example, three or five drive region sections.

[0005] Starting from the prior art, there is a need for further structural optimization of the drive train of a belt drive for an elevator installation, in particular with regard to the dimensions of the shaft. In particular, there is also interest in the technical teaching, especially with regard to potential savings related to the resources used for construction, which can be used for the (structural) optimization of the shaft in as scalable a manner as possible. Summary of the Invention

[0006] The object of the present invention is to provide a drive train device, in particular for an elevator installation having a belt drive, in which the shaft is advantageously configured and dimensioned in terms of its construction, in particular in terms of a material- and cost / resource-saving design. Another object of the present invention is to configure the shaft of the drive train device, in particular for an elevator installation having a belt drive, such that the shaft can cooperate advantageously with the other components of the drive train and can be installed advantageously.

[0007] This object is achieved by a drive train device according to claim 1 and a shaft designed for it according to the corresponding alternative independent claims and its use. Advantageous refinements of the invention are explained in the corresponding dependent claims. Unless otherwise explicitly stated, the features of the exemplary embodiments described below can be combined with one another.

[0008] There is provided a drive train device for a belt drive unit of an elevator installation, having a shaft which is mounted in a housing and on which there is formed at least one drive zone for a belt for interacting with the belt drive unit, wherein the drive zone has a drive zone width, and wherein the shaft has at least one section whose axial length is dimensioned in dependence on the drive zone width;

[0009] According to the invention, it is proposed that the absolute length of the shaft is greater than the drive zone width according to a predetermined / predeterminable length factor, wherein the predetermined / predeterminable length factor is less than an upper threshold value, in particular a length factor less than or equal to (<=) 3.3. This also allows for an optimized dimensioning based essentially on the requirements of the belt coupling. In this case, the invention is also based on the idea of keeping the structure as slender as possible and providing a favorable installation environment. In other words, the shaft can be dimensioned as slender as possible in dependence on the drive zone width, in particular the shaft can be dimensioned as short as possible.

[0010] In this case, the phrase "according to at least one predetermined / predeterminable length factor" is to be understood as meaning that the dimensions of the entire shaft can be determined in dependence on the preferred width of the entire drive zone. The invention is thus also based on the technical teaching of essentially configuring the absolute dimensions of the shaft by reference to the drive zone width.

[0011] The "(absolute) drive zone width" should be understood here as the contact surface or running surface that can in particular be used by the (corresponding) belt acting around the shaft. For the case where the drive zone is subdivided (in particular by webs) into at least two (e.g., three or four) drive zone segments, the (absolute) drive zone width should also be understood here as the longitudinal segment of the shaft that is constructively considered for the configuration of the (central) web for guiding the corresponding belt; thus, the (absolute) drive zone width consists of the widths of the individual drive zone segments and the width of the web or shoulder for guiding the belt (or at least its structurally expected minimum width, e.g., 10% of the width of the corresponding drive zone segment, e.g., 5 mm for each shoulder or web). In the case of two drive zone segments, the (absolute) drive zone width is correspondingly given by the sum of the widths of the two drive zone segments and the width of the central web and possibly the widths of the two defining shoulders; in the case of three drive zone segments, the (absolute) drive zone width is correspondingly given by the sum of the widths of the three drive zone segments and twice the width of the corresponding central web and possibly also by the width of one or more laterally defining shoulders. Even in the case where only one belt or only a single drive zone segment is provided, it may be necessary to consider approximately 10% on both sides of the drive zone segment, especially in this case if two shoulders are also provided structurally. Since, in terms of construction, the shoulders do not necessarily have to be incorporated into the planning as an integral part of the shaft, but can also be provided, for example, by an additional disk, the present invention relates to two variants: If no integral shoulders are provided, the corresponding indicated width relates to the length segment provided for the drive zone in the case of the actual available running surface of the (multiple) belts and the length segment provided for the disk or similar axially defining device. In this regard, the term "drive zone width" should also be understood as the structurally indicated length of the length segment of the shaft, especially between two bearing segments, and correspondingly structurally included in the proper functional planning of at least one belt.

[0012] The "shoulder" is understood here as the lateral boundary of the entire drive zone, which is preferably integrally formed on the shaft as the "(shaft) shoulder", or can alternatively be connected to the shaft in the form of an additional disk (attachment part) (see the so-called flange pulley in a standard belt drive). Unless otherwise explicitly stated here, the shoulder is preferably integrally formed on the shaft, that is, formed by machining the material on the shaft.

[0013] The "web" should be understood here as the protrusion that subdivides the drive zone into separate drive zone segments, especially for coupling with multiple belts, each of which is intended to run on only one drive zone segment with the webs separating them from each other. Similarly, unless otherwise explicitly stated here, the corresponding web is preferably integrally formed on the shaft, i.e., the "(shaft) web".

[0014] The shoulders and webs described herein can also perform the function of providing a contact / stop / rolling surface for the belt pressing unit.

[0015] The "(absolute) belt width" shall be understood here as the cumulative width of the belts used, i.e., in the case of, for example, three belts, three times the width of a single belt (assuming that all belts have exactly the same width).

[0016] Here, the "drive zone diameter" shall be understood as the maximum diameter of the lateral surface of the drive zone or the corresponding drive zone section (in the case of multiple belts), with which the belts interact with the shaft as intended. Usually, the lateral surface of the drive zone is not strictly cylindrical but slightly arched (centering function of the belts); thus, the drive zone diameter is understood here as the diameter that typically characterizes the maximum diameter in the central region of the drive zone or the corresponding drive zone section.

[0017] The length dimension concept according to the invention can also be combined with the diameter dimension, in which case reference can also be made to the drive zone. Advantageously, according to at least one predetermined (diameter) coefficient, the drive zone diameter is greater than the shaft diameter at least in the section adjacent to the drive zone (excluding any shoulders defining the drive zone), in particular in the first and / or second bearing sections for defining the drive zone bearings.

[0018] The "belt drive unit" shall be understood here as particularly referring to a tractor by means of which force can be transmitted from an electric motor to at least one traction device in the form of a belt, wherein the belt drive unit is configured to accommodate, mount, and support a shaft that interacts with at least one traction device. Although the shaft can also be regarded as a component of the belt drive unit, according to one of the exemplary embodiments, the belt drive unit is configured to accommodate different shafts (e.g., according to the power level or according to the predetermined or required number of belts), and thus the belt drive unit can also be without a shaft. The belt drive unit at least includes a housing that accommodates or at least holds the shaft and the electric motor or the drive.

[0019] The "powertrain device" shall be understood here as particularly referring to a torque transmission component that interacts with at least one belt, in particular including a feather key and / or at least one toothed part (usually a shaft-hub connection); depending on the configuration of the shaft and the bearings and the required installation sequence, the powertrain device can also include bearing components or the entire bearing. By definition, the powertrain device can also include the electric motor or the drive of the belt drive unit in this case.

[0020] In the context of the present disclosure, anthropomorphic expressions may apply to all genders, unless neutral wording is used here. Any English expression or abbreviation used here is a conventional technical expression in the art and is an English expression familiar to those skilled in the art.

[0021] Here, the predetermined / predeterminable length coefficient is less than an upper threshold value, specifically a length coefficient less than or equal to 3.3. This results in the shaft being as short as possible.

[0022] According to the present invention, the predetermined / predeterminable length coefficient is between 2.5 and 3.3. This allows for a favorable arrangement of other components interacting with the shaft, with the shaft being as short as possible, or interacting with a drive zone that is relatively wide with respect to the total extent of the shaft. In this regard, the present invention also contributes to a belt drive that is as effective and high-powered as possible even under very high space requirements. In particular, in this way, the dynamic (bending) loads applied to the shaft and the bearings can also be minimized. It has been found here that the size of the shaft should not be significantly less than a length coefficient of 2.5 times the width of the drive zone, especially in order to avoid the complexity of the arrangement and support of other components interacting with the shaft.

[0023] According to an exemplary embodiment, the predetermined / predeterminable length coefficient is less than (or less than or equal to) an upper threshold of 3.0. This results in a more compact arrangement, further optimizing the length, for example, in terms of the relative width of the web / shoulder. Thus, starting from the force transmission requirements of the drive zone, the present invention teaches that in the design / sizing process of the drive train, especially in combination with a favorable diameter ratio, within a relatively small length change window of only about 15% to about 20% length change (from at least 2.5 times to a maximum of 3.0 times, corresponding to only about 15%), a favorable compact (length) size of the entire shaft can be achieved.

[0024] According to an exemplary embodiment, there are provided at least two drive zone segments that together form a drive zone, especially at least two drive zone segments having the same drive zone diameter, especially at least two or at least three drive zone segments respectively defined by webs that are arranged around the shaft in a circumferential manner, especially drive zone segments of the same width. This also enables the scaling of the available number of belts. The drive zone segments preferably all have the same diameter (here referring to the maximum diameter in the case where the drive zone is in an arc form).

[0025] According to an exemplary embodiment, the shaft is configured to interact with at least two (e.g., three or four) belts that are guided on the respective drive zone segments of the drive zone, the drive zone segments especially being defined by webs with respect to each other. This configuration, in combination with the other features described here, results in a favorable (especially easily expandable) configuration and function of the drive train.

[0026] Advantageously, the shaft has two bearing segments, where the drive zone is arranged between the bearing segments, especially directly adjacent to a first bearing segment provided for a first bearing (especially a fixed bearing), and / or directly adjacent to a second bearing segment provided for a second bearing (especially a floating bearing). In this case, even without any significant further change in diameter, the diameter of the corresponding bearing segment can be continued or adopted until the corresponding end of the shaft (possibly except for a very small step or shoulder or radius).

[0027] Advantageously, the drive region is delimited on both sides by bearing sections of the shaft. This also promotes the advantageous integration of the support function into the housing (transmission of bearing forces).

[0028] Advantageously, the shaft has a maximum diameter in the region of the drive region (excluding any shoulders delimiting the drive region and / or webs subdividing the drive region into multiple sections), and has a second-largest diameter in the region of the first or second bearing section. This particularly promotes an advantageous configuration in which the drive region is at least approximately centered / aligned with respect to the total length of the shaft.

[0029] For example, two or three drive-region sections that together form the drive region are provided, where the drive-region sections are separated from one another by (central) webs that are arranged around the shaft in a circumferential manner, and where the width of the (central) web is in the range of 3% to 15% of the width of a single drive-region section, particularly at least approximately 10%. In this way, it is also possible to provide as large / wide an available running surface as possible on a relatively short absolute width of the drive region or the length of the shaft section provided for this purpose.

[0030] According to an exemplary embodiment, the (absolute) width of the drive region (or the axial length of the corresponding shaft section), including any shoulders and / or webs for delimiting the drive-region sections, is in the range of 28% to 42% of the absolute length, particularly in the range of 30% to 35% of the absolute length of the shaft. This also makes it possible to have a relatively short structural length of the shaft, and thus to achieve a compact drive in which the available or effective drive region can be maximized. In this case, the shoulders can be included in the (absolute) width of the drive region, that is, at least with a minimum width (including in the structural planning) in accordance with the webs provided on multiple belts. The actual width of one of the shoulders may vary in individual cases, for example, if the shoulder transitions to other shaft sections (particularly without a distinct step).

[0031] The above object is also achieved by a shaft for a powertrain device as described herein, where the shaft diameter is greater in the first and second bearing sections of the bearing for delimiting the drive region than in another section of the shaft adjacent to the corresponding bearing section, and where the width of the drive region is in the range of 28% to 42% of the absolute length of the shaft. In other words: the (absolute) length of the shaft section provided for the drive region is in the range of 28% to 42% of the absolute length of the shaft. This results in the above advantages, particularly with regard to the measures on the shaft, which are relatively easy to implement but bring advantages to the entire powertrain in many respects.

[0032] Here, for the bearing delimiting the drive region, the shaft diameter can be greater in both the first and second bearing sections than in another section of the shaft adjacent to the corresponding bearing section in the direction of the respective shaft end (excluding any shoulders delimiting the drive region).

[0033] The shaft may have a shoulder in front of the corresponding bearing section, which limits the (absolute) drive zone width. In this case, its dimensions are such that the drive zone width available for at least one belt is shortened by at most 10%. For example, in this case, the shoulder may define an axial stop for the corresponding bearing and optionally also perform the function of a specific structural axial length buffer, for example to allow for easier response to any required changes in power level and / or required absolute drive zone width and / or belt width and / or bearing width. In particular, this axial length buffer provided by at least one shoulder also allows for potential variation / optimization possibilities in terms of the optimal ratio of the belt width to the width of the correspondingly provided drive zone section (the drive zone section is oversized in terms of width by a favorable factor in order to allow the belt to move freely in the axial longitudinal direction), especially without having to adjust the installation of the shaft (and the housing) in the process. Therefore, the optimization measures described here may have been implemented in such a way that the structural gap remains open.

[0034] The above object is also achieved by a belt drive unit of an elevator device that is mounted / can be mounted in the drive train device described herein, wherein the belt drive unit is configured to couple at least one driver of the belt drive unit to at least one component to be driven of the elevator device via at least one belt. This results in the above advantages, especially in terms of the integration of the drive train components between the driver and the component to be driven of the elevator device that is as slender as possible.

[0035] The above object is also achieved by an elevator device having the drive train device described herein and at least one belt drive unit mounted therein, the belt drive unit coupling at least one driver of the belt drive unit to at least one component to be driven of the elevator device via at least one belt. This makes it possible to achieve the above advantages.

[0036] The above object is also achieved by using a shaft dimensioned in a length-optimized manner for a drive train arrangement of an elevator installation, in particular in the drive train device described herein, for coupling a belt drive unit of the elevator installation / at least one drive of the belt drive unit to at least one driven component of the elevator installation by means of at least one belt, wherein the shaft is mounted in bearings on both sides of the drive zone / the drive zone, and wherein the shaft has at least one section whose axial length is dimensioned depending on the width of the drive zone; wherein the absolute length of the shaft is greater than the width of the drive zone according to a predetermined length factor, and wherein the predetermined length factor is less than an upper threshold value, in particular less than a length factor of 3.3. This enables the above advantages to be achieved. In this case, with respect to the (absolute) width of the drive zone, the length dimension of the shaft is such that the absolute length of the shaft lies within a length factor range of 2.5 to 3.3 times the (absolute) width of the drive zone. Optionally, in this case, a diameter-optimized dimension can also be achieved, again with reference to the dimensions of the drive zone, in particular according to at least one predetermined (diameter) factor, the diameter of the drive zone being greater than the shaft diameter in two bearing sections adjacent to the drive zone (excluding any shoulders defining the drive zone).

[0037] Further features will now be explained which contribute to further structural optimization, in particular in the overall context, taking into account the requirements for the respective shaft diameter.

[0038] Advantageously, according to at least one predetermined (diameter) factor, the drive zone diameter is greater than the shaft diameter at least in the sections adjacent to the drive zone, in particular in the first and / or second bearing sections of the bearing for defining the drive zone.

[0039] Advantageously, in at least one bearing section, in particular in the two bearing sections of the bearing defining the drive zone, the dimensional ratio of the drive zone diameter to the shaft diameter is less than or equal to (<=) 2.0. This also promotes as uncomplicated a material processing as possible; the corresponding bearings are designed to be relatively small, in particular significantly smaller than the bearing / the additional bearing.

[0040] Advantageously, in particular in the two bearing sections of the bearing defining the drive zone, the dimensional ratio of the drive zone diameter to the shaft diameter is greater than or equal to (>=) 1.05. This also avoids excessive dimensions.

[0041] Advantageously, in at least one bearing section of the bearing defining the drive zone, in particular in the two bearing sections of the bearing when defining the drive zone, the dimensional ratio of the drive zone diameter to the shaft diameter is in the range from less than or equal to (<=) 2.0 to greater than or equal to (>=) 1.05. This also results in a favorable size gradient when implementing bearings of different sizes (if required).

[0042] For example, the size ratios (drive zone diameter to shaft diameter) described herein are in the region of 1.8 in the first bearing section and in the region of 1.2 in the second bearing section (and vice versa), or more moderate respectively, with a smaller diameter change in the bearing sections (e.g., 1.7 and 1.3).

[0043] It has been shown that starting from a ratio of the drive zone diameter to the shaft diameter greater than 2.0 (i.e., the reciprocal of the ratio of the shaft diameter to the drive zone diameter is less than 0.5), the material processing of the shaft becomes relatively complex. It has also been shown that when the ratio of the drive zone diameter to the shaft diameter is below 1.05 (i.e., the reciprocal of the ratio of the shaft diameter to the drive zone diameter is greater than 0.95), an oversized dimension (the shaft is too thick) occurs.

[0044] According to the present disclosure, when indicating the size ratio, the drive zone diameter is preset because this serves as a reference variable. However, the indicated size ratio can also be presented in an inverted form as a reciprocal or used as a specification.

[0045] Advantageously, in the first bearing section receiving the fixed bearing, the size ratio of the drive zone diameter to the shaft diameter is in the range of 1.9 to 1.6, especially with a maximum deviation of 10%. This also allows, for example, a favorable bearing arrangement and a fixed connection to the braking unit.

[0046] Advantageously, in the second bearing section receiving the floating bearing, the size ratio of the drive zone diameter to the shaft diameter is in the range of 1.1 to 1.4, especially with a maximum deviation of 10%. This allows, for example, a favorable bearing arrangement in combination with the rotor, which is also rotationally engaged and arranged on the shaft.

[0047] Here, preferably, the diameter of the floating bearing section is greater than / remains greater than the size of the fixed bearing section anyway.

[0048] For example, for a drive zone with a diameter of approximately 75 mm or 80 mm, the absolute width of the drive zone within the 105 mm region can result in an absolute length of the shaft in the 335 mm region (length ratio of approximately 31%), or the absolute width of the drive zone within the 160 mm region can result in a relative shaft length in the 470 mm region (length ratio of approximately 34%). For example, for a drive zone with a diameter of approximately 100 mm, the absolute width of the drive zone within the 230 mm region can result in an absolute length of the shaft in the 550 mm region (length ratio of approximately 42%). It is noted that the diameters shown here should be understood as exemplary, that is, the technical teaching of the present invention regarding the length dimension is based on the concept of determining the absolute length of the shaft based on the width of the drive zone, that is, largely independent of the drive zone diameter; however, the exemplary diameters indicated here can facilitate the understanding of the present invention and can facilitate the implementation of corresponding favorable configurations.

[0049] Abstract: Even when designing a drive train for an elevator installation, it is necessary to achieve a favorable compromise between the required resources and the achievable technical (performance) data. In particular, in the case of a drive train with a belt drive, the shaft interacting with the drive area and at least one belt needs to be structurally optimized in order to be able to utilize the improvement potential, including other components of the drive train. According to the invention, the shaft has an absolute length, the dimensions of which depend on the drive area width, where the drive area width is smaller than the absolute length by a favorable length factor (or vice versa, where the absolute length is at most larger than the drive area width by a favorable factor). This length dimension relative to the drive area width allows for finding a particularly favorable compromise on the basis of the length dependence, especially with regard to the optimization of material processing costs and the smallest possible dimensions (avoiding over-dimensioning), where, based on this, in the context of standardizable design guidelines, corresponding drive trains can also be designed in a simple manner for different applications. Optionally, in this case, the dimensions of at least one diameter of the shaft may also be predetermined in a manner depending on the drive area diameter, that is to say, there is also a diameter dependence. Description of the Drawings

[0050] In the following drawings, the invention will be described in more detail, where, for reference numerals not explicitly described in the drawings, reference is made to the other drawings in the drawings. In the drawings:

[0051] Figure 1 、 Figure 2 、 Figure 3 are each shown in a perspective side view a shaft configured for a drive train device according to an exemplary embodiment;

[0052] Figure 4 is shown in a sectional side view a shaft configured for a drive train device according to an exemplary embodiment;

[0053] Figure 5 is shown schematically a drive train device coupled to an elevator installation according to an exemplary embodiment;

[0054] Figure 6A 、 Figure 6B are each shown in a perspective side view a belt drive unit having a shaft or a drive train arrangement according to an exemplary embodiment. Detailed Description

[0055] First, the invention will be generally explained with reference to all reference numerals and the drawings. The special features or individual aspects of the invention clearly visible / present in the respective drawings will be discussed separately in connection with the respective drawings.

[0056] There is provided a drive train device 10 for a belt drive unit (tractor) 20, in particular for driving an elevator car 1 of an elevator installation 100, wherein a drive 23 is coupled to at least one belt 21 via a shaft 13. The shaft 13 is mounted in a housing 19 in a first bearing 11 (in particular a fixed bearing) and a second bearing 12 (in particular a floating bearing) in a first bearing section 13.1 and a second bearing section 13.2, wherein at least one belt 21 is guided in a drive area 13.4 which optionally comprises a plurality of sections 13.5, wherein the sections 13.5 are separated from one another by webs 13.3a respectively, and wherein the entire drive area is optionally laterally delimited by at least one shoulder 13.3. It is possible to provide a rotational engagement device, in particular for components of a braking unit 17, on one of the shaft ends of a toothing 13.6, and it is possible to provide it on the other shaft end of a feather key section 13.7 or on a similar rotational engagement coupling coupled to the rotor of the drive 23.

[0057] The following reference signs denote in detail individual indications relating to dimensions or positions, with reference to the radial direction (r) and the longitudinal direction (axial direction) x:

[0058] B13 width or length section (absolute value) between the bearing seats / bearing surfaces around the drive area; b13.3 width of a single shoulder; b13.3a width of a single (central) web; B13.4 absolute drive area width covering all drive area sections and the webs / shoulders for delimitation; b13.5 width of a single drive area section (average ratio of web / shoulder); b21 width of a single belt, B21 absolute belt width of all belts used; D0 shaft diameter at the first end of the shaft (in particular the toothing); shaft diameter D1 in the first bearing section, in particular the shaft diameter directly adjacent to the drive area, except for the shoulder; (first) shoulder diameter D2 (or shaft diameter in the first shoulder area); drive area diameter D3 (or shaft diameter in the area of the drive area); (central) web diameter D4 (or shaft diameter in the area of the web); (second) shoulder diameter D5 (or shaft diameter in the second shoulder area); shaft diameter D6 in the second bearing section, in particular the shaft diameter directly adjacent to the drive area, except for the shoulder; shaft diameter D7 at the second shaft end (in particular in the feather key section, rotor coupling section); the absolute length of the shaft is denoted here by L13 - according to the present disclosure, the absolute length L13 is structurally limited by a length coefficient relative to the drive area width, for example a length coefficient of 3, with a maximum length coefficient of 3.3. In this regard, the invention also allows a relatively large effective length relative to the absolute length of the shaft, with the advantageous effect that a highly compact belt drive unit can be provided; thus, advantages relating to the arrangement of the belt drive unit in a (lift) shaft relative to the guide rails can also be achieved.

[0059] It is noted that according to the present invention, the corresponding (shaft) shoulder 13.3 is in the form of a one-sided separating step for restricting the movement of the belt (restricting the required axial movement freedom of the corresponding belt), and the (shaft) web 13.3a is configured as a central web in terms of construction, that is, it acts on both sides in a separated manner, and thus also provides an axial stop for the two corresponding belts (in this regard, the conceptual difference between the web and the shoulder selected here is also understandable). Optionally, it can also be stipulated to define the axial boundary of the feather key section (or equivalent rotary tapered shaft hub connection), especially through the shaft shoulder step, however, the form of this step may be much flatter than the shoulder described herein for defining the drive area.

[0060] Appropriate coupling can be provided on the guide device, diaphragm (blende) or the housing of such a guide plate 19.9 to correctly feed in and out the belt(s).

[0061] Hereinafter, the special features of the present invention will be explained with reference to the respective drawings or exemplary embodiments.

[0062] Figure 1 A first type of shaft with features according to the present invention is shown (the belt is not shown); the drive area 13.4 has two drive area sections 13.5, which are separated from each other by the web 13.3a. According to the advantageous length coefficient (length coefficient range), the drive area width B13.4 is smaller than the absolute length of the shaft, or vice versa (reciprocal). At the same time, according to at least one advantageous coefficient, the drive area diameter can also be configured to be larger than the shaft diameters on both sides of the drive area. In this case, the longitudinal coefficient (length coefficient) and the radial coefficient (diameter coefficient) can be predetermined largely independently of each other.

[0063] Figure 2 A second type of shaft with features according to the present invention is shown (the belt is not shown); the drive area 13.4 has three drive area sections 13.5.

[0064] Figure 3 A third type of shaft with features according to the present invention is shown (the belt is not shown); the drive area 13.4 has three drive area sections 13.5. This type is slightly different from the type Figure 2 shown in terms of the construction of the shoulder 13.3 and the feather key section 13.7 and the support section 13.2 between the drive area 13.4.

[0065] Figure 4 A shaft with features according to the present invention is shown, which has a belt 21 in the drive area, and the position indication related to the individual dimensions is explained in detail. The design parameters according to the present invention (reference variables for stipulating the drive area widths B13.4, B13.5 of the absolute length L13 of the shaft) are emphasized by underlines here respectively. Figure 4It is also emphasized that assuming that the belts in use have the same width (B21 = 2xb21), in the case of using two belts (as described herein), the absolute belt width B21 corresponds to twice the width of a single belt B21.

[0066] Figure 5 Roughly schematically shows the interaction between the elevator car 1 and the drive train device 10. The shaft described herein is installed in the drive train device 10. The positional relationship between the components shown is intentionally not indicated here; in this regard, those skilled in the art can provide user-specific embodiments.

[0067] Figure 6A Shows the belt drive unit 20 on the side of the drive device or motor 23; Figure 6B In, the opposite side for arranging the brake unit 17 can be seen. As can be seen from FIG. 6, the drive area is basically arranged in the center, and the relatively compact structure of the entire belt drive unit 20, especially due to the shaft, according to the invention, the size of the shaft is designed to be as short as possible.

[0068] List of reference numerals

[0069] 1 Elevator car

[0070] 10 Drive train device

[0071] 11 First bearing, especially fixed bearing

[0072] 12 Second bearing, especially floating bearing

[0073] 13 Shaft

[0074] 13.1 First bearing section

[0075] 13.2 Second bearing section

[0076] 13.3 (Shaft) shoulder, especially separated on one side

[0077] 13.3a (Shaft) web, configured as a central web, separated on both sides

[0078] 13.4 Drive area, optionally including multiple sections

[0079] 13.5 Single drive area section, separated by a web or shoulder

[0080] 13.6 Tooth section, especially for the brake unit

[0081] 13.7 Spline section (rotationally connected to the rotor of the drive / motor)

[0082] 17 Brake unit

[0083] 19 Housing

[0084] 19.9 Guide device, partition board, guide plate

[0085] 20 Drive unit (tractor)

[0086] 21 Belt

[0087] 23 Motor, driver

[0088] 100 Elevator equipment

[0089] B13 Width or length section (absolute) between bearing seat / bearing surface

[0090] b13.3 Width of shoulder

[0091] b13.3a Width of single central web

[0092] B13.4 (absolute) Drive zone width

[0093] b13.5 Width of single drive zone section

[0094] b21 Width of single belt

[0095] B21 (absolute) Belt width

[0096] D0 Shaft diameter at the first end (especially tooth part)

[0097] D1 Shaft diameter of the first bearing section

[0098] D2 (first) Shoulder diameter (shaft diameter in the area of the first shoulder)

[0099] D3 Drive zone diameter (shaft diameter in the area of the drive zone)

[0100] D4 (central) Web diameter (shaft diameter in the area of the web)

[0101] D5 (second) Shoulder diameter (shaft diameter in the area of the second shoulder)

[0102] D6 Shaft diameter of the second bearing section

[0103] D7 Shaft diameter at the second end (especially keyway section, rotor coupling)

[0104] L13 Absolute length of the shaft

[0105] R Radial direction

[0106] X Longitudinal direction (axial).

Claims

1. A drive train device (10) for an elevator installation (100) with a belt drive unit (20), having a shaft (13) which is mounted in a housing and on which there is formed at least one drive region (13.4) for a belt for interacting with the belt drive unit / the belt drive unit, wherein, the drive region (13.4) has a drive region width (B13.4), and wherein the shaft (13) has at least one section, the axial length of which is dimensioned in dependence on the drive region width (B13.4); characterized in that the absolute length (L13) of the shaft (13) is greater than the drive region width (B13.4) according to a predetermined / predefinable length factor, wherein the predetermined / predefinable length factor is less than an upper threshold value, and wherein the predetermined / predefinable length factor is between 2.5 and 3.

3.

2. The drive train device (10) according to claim 1, wherein, the predetermined / predefinable length factor is less than the upper threshold value of 3.

0.

3. The drive train device (10) according to any one of the preceding claims, wherein, there are provided at least two drive region sections (13.5) which together form the drive region (13.4), in particular at least two drive region sections (13.5) having the same drive region diameter (D3), in particular at least two or at least three drive region sections (13.5) which are separated from one another by webs (13.3a), the webs being arranged around the shaft (13) in a circumferential manner, in particular drive region sections (13.5) having the same width.

4. The drive train device (10) according to any one of the preceding claims, wherein, the shaft (13) is configured to interact with at least two belts (21) guided on the respective drive region sections (13.5) of the drive region (13.4), the drive region sections being separated from one another in particular by webs (13.3a).

5. The drive train device (10) according to any one of the preceding claims, wherein, the shaft (13) has two bearing sections (13.1, 13.2), and wherein the drive region (13.4) is arranged between the bearing sections, in particular directly adjacent to the first bearing section provided for the first bearing (11) / the first bearing section, and / or directly adjacent to the second bearing section provided for the second bearing (12) / the second bearing section.

6. The drive train device (10) according to any one of the preceding claims, wherein, the drive region (13.4) is delimited on both sides by the bearing sections (13.1, 13.2) of the shaft (13).

7. The drive train device (10) according to any one of the preceding claims, wherein, the shaft (13) has a maximum diameter in the region of the drive region (13.4) and a second maximum diameter in the region of the first or second bearing section (13.1, 13.2).

8. The drive train device (10) according to any one of the preceding claims, wherein, There are provided two or three drive section segments (13.5) that together form the drive region (13.4), wherein the drive section segments (13.5) are separated from each other by webs that are arranged in a surrounding manner on the shaft (13), and wherein the width of the webs is in the range of 3% to 15% of the width of a single drive section segment (13.5), in particular at most and at least approximately 10%.

9. The drive train device (10) according to any one of the preceding claims, wherein, the width of the drive region (13.4) is in the range of 28% to 42% of the absolute length (L13) of the shaft (13), in particular in the range of 30% to 35% of the absolute length (L13) of the shaft (13), and the drive region includes any shoulders and / or webs provided for separating the drive section segments (13.5).

10. A shaft (13) for a drive train device (10) according to any one of the preceding claims, wherein, the diameter of the shaft is greater in the first and second bearing section segments of the bearings that define the drive region (13.4) than in another section of the shaft adjacent to the respective bearing section segment, and wherein the width of the drive region (13.4) is in the range of 28% to 42% of the absolute length (L13) of the shaft (13).

11. A belt drive unit (20) of an elevator installation (100), which is installed / can be installed in a drive train device (10) according to any one of claims 1 to 9, wherein, the belt drive unit is configured to couple at least one drive of the belt drive unit (20) to at least one component to be driven of the elevator installation (100) by means of at least one belt.

12. An elevator installation (100) having a drive train device (10) according to any one of claims 1 to 9 and at least one belt drive unit (20), the belt drive unit being installed in the drive train device and coupling at least one drive of the belt drive unit (20) to at least one component to be driven of the elevator installation (100) by means of at least one belt.

13. Use of a drive train device (10) for an elevator installation (100), in particular of a shaft (13) dimensioned in an optimized manner in length in a drive train device (10) according to any one of claims 1 to 9, for coupling a belt drive unit (20) of the elevator installation (100) / at least one drive (23) of the belt drive unit (20) to at least one component to be driven of the elevator installation (100) by means of at least one belt, wherein, The shaft (13) is mounted in bearings on both sides of the drive region (13.4) / the drive region (13.4), wherein the shaft (13) has at least one section whose axial length is dimensioned in dependence on the width (B13.4) of the drive region; wherein the absolute length (L13) of the shaft (13) is greater than the width (B13.4) of the drive region according to a predetermined length factor, wherein the predetermined length factor is less than an upper threshold value, in particular a length factor less than 3.3, and wherein the predetermined / predeterminable length factor is between 2.5 and 3.3.

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