EP3114067B1 - Drive with multiple linking element for an elevator system - Google Patents

Description

The invention relates to a drive machine for an elevator installation, to a corresponding elevator installation, and to a method for carrying and driving vehicles of an elevator installation.
Elevator systems are used to transport passengers and loads between floors of a building. For this purpose, various elevator systems are known. Traction lifts usually include an elevator car and a counterweight, which are connected by means of suspension, wherein the support means is guided over a drive machine. The drive machine drives by means of a traction sheave the support means and thereby moves the car and the counterweight in the building in opposite directions up and down. Instead of cabin and counterweight, two cabins can be used. In general, these are two drive bodies which are moved by the suspension means against each other.

Various arrangements of suspension elements in elevator systems are known. Partially the two driving bodies are arranged directly in a so-called 1: 1 suspension. The two ends of the support means are firmly connected to a respective drive body and the support means is guided over the traction sheave. A peripheral speed of the traction sheave, the speed of the suspension element and the speed of the carriage are identical. In a so-called 2: 1 suspension, the suspension element is mounted in the building and the car bodies are suspended by means of support rollers on the suspension element. The peripheral speed of the traction sheave, the speed of the support means in the traction sheave is thus twice as large as the speed of the carriage. In a 4: 1 suspension, the support means is mounted in the building and the car bodies are hung by means of support rollers 2-fold suspended on the suspension means, the support means is also performed in the building again on a roller. The peripheral speed of the traction sheave and the speed of the support means in the traction sheave are thus four times as large as the speed of the carriage. By means of the type of suspension thus on the one hand, the load capacity in the suspension element and a required drive torque at the drive slide is reduced according to the selected suspension and increases the peripheral speed of the traction sheave accordingly.

From the WO 2012/115632 is an elevator system with a 4: 1 suspension known, with support means are used in the form of shoulder straps and the associated roles for deflecting the straps in the shaft are arranged to save space.
From the WO 2006/005215 is also known an elevator system, which arranges the required chess roles to protect the straps. From the EP1553040 an elevator installation and a method according to the preamble of claims 1 and 17 is known.

A disadvantage of the elevator systems shown is that on the one hand the straps are rotated between the rollers and partly because of laterally staggered rollers, additional diagonal pull are exposed.
It is accordingly an object to propose alternative concepts of assemblies or arrangements of suspension means and associated pulleys, which at least partially counteract or mitigate the disadvantages known from the prior art, and / or which allow good space utilization.
An elevator installation includes at least a first drive body and a second drive body. The two drive bodies are connected to each other with at least one suspension element. Between the two vehicles, a drive machine is arranged in the suspension element course. By means of the drive machine, the at least one suspension means can be driven, whereby the two drive bodies can be carried and moved. The two drive bodies each include at least a first support roller and the support means carries by means of these support rollers, the drive body at least partially. Further, the drive machine includes at least a first and a second machine roll, which are arranged on a common axis of rotation of the drive machine. At least one of these first or second machine rolls is a machine drive pulley or traction sheave for driving the suspension element.
Preferably, the at least one support means is guided from the first to the second drive body via the first and the second machine roll and the guide of the suspension element and the configuration of the drive machine is such that the peripheral speeds of the two machine rolls are different in the process. This is advantageous because a compact, space-saving arrangement can be achieved, in particular for suspensions greater than 2: 1, for example, for 3: 1, 4: 1 suspensions or, of course, for even larger ratios in the suspension. Also let implement support guides without suspension element twistings, which is particularly advantageous when using strap as a support means.

The at least one machine drive pulley or traction sheave for driving the suspension element is preferably drivable by means of a drive motor. The other of the first or second machine roll is either freely rotatable arranged on the common axis of rotation of the drive machine or it is also driven by a motor. As a result, optionally only the load capacity in the support means can be reduced, provided that the other of the first or second machine roll is arranged freely rotatable, or it can be reduced in the support means and the supporting force to be initiated by the drive in the suspension means are distributed to several machine roles, provided the other of the first or second machine roll is also arranged to be driven by a motor on the common axis of rotation of the drive machine.

In an arrangement with a motor driven other machine drive pulley or traction sheave, this other machine drive pulley or traction sheave can be driven by the same a drive motor, which can thus drive the first and second machine reel. Between the first and second machine reel, there is, for example, an external gear ratio using different diameters, a gear stage, a differential gear and / or a flexible coupling.
In an alternative arrangement with other engine drive pulley or traction sheave that can be driven by a motor, this other machine drive pulley or traction sheave may be driven by another or separate drive motor. This allows a driving force to be controlled in the support means as needed.

Preferably, the elevator installation includes a second drive machine or a deflection device with a third machine roll and a fourth machine roll. This third and fourth machine reel are arranged as in the first drive machine on a common axis of rotation of the second drive machine or the deflection device. The support means is thus guided on its way from the first to the second drive body on the third and fourth machine role. Again, the peripheral speed of the third and the fourth machine reel are different. This is advantageous because it distributes a drive torque to two smaller units can be. This is particularly advantageous if, for reasons of rope guide anyway additional redirection is required. Next results from the listed embodiment of the second drive machine or the deflection a space-saving arrangement.

Preferably, at least the first drive body includes a second support roller and the support means is guided in a 4: 1 suspension to the first drive body or to its support rollers. In this case, the suspension element is guided, starting from a first fixed attachment point in a shaft of the elevator installation, to the first support roller of the first drive body. From there it is guided further to the first machine roll of the drive machine and in turn is guided back to the second support roller of the first drive body. Next, the support means is guided by the second support roller of the first drive body to the second machine roll of the drive machine. The peripheral speed of the second machine roller of the drive machine corresponds approximately to twice the peripheral speed of the first machine roller. The term "approximately" is to be understood also for the following statements, that, especially when the first and the second machine reel are designed driving, between the two roles can cause differences in stretching or slip. Otherwise, in a strain and slip-free consideration, of course, results in a translation of the suspension corresponding difference in the peripheral speeds of the two machine roles.

This type of support means guide is advantageous because a further reduction of the load capacity in the suspension element can be achieved by the large translation in the suspension and because the resulting high machine speed allows the use of small motors.

In a further refinement, in particular when using the second drive machine or the deflection device, the second drive body further includes a second carrying roller and the carrying means is likewise guided in a 4: 1 suspension to the second drive body or to its carrying rollers. The support means is accordingly guided from the second machine roll of the drive machine to the fourth machine roll of the second drive machine or the deflection device. From this fourth machine roll, the suspension element is further to the second Carrying roller of the second drive body out and after wrapping the same is guided back to the second drive machine or the deflection and there guided over the third machine role. The support means is further guided by the third machine roll to the first support roller of the second drive body and finally passed after wrapping around this first support roller of the second drive body to a second fixed attachment point of the support means in the shaft and fastened there.
This further embodiment is advantageous since the two driving bodies thereby work with the same ratios, whereby in particular the paths become the same.

As an alternative to the previously described embodiment, the second drive body has an attachment point for fastening the suspension element, and the second drive body is arranged in a 3: 1 suspension. Preferably, support rollers of the second drive body are arranged below the drive body.
This alternative embodiment is advantageous since, for example, the first drive body, in particular a counterweight, can be designed with a 4: 1 suspension and the second drive body, in particular an elevator car, can be designed with a 3: 1 suspension. A travel of the first drive body is thus only ¾ of the travel of the second drive body. Thus, for example, above the second drive body remains enough space for an arrangement of the prime mover. Next can and a diagonal train of the support means, which is due to the two-time looping around the axis of rotation of the drive machine, are reduced to a small angular range. As a result, a compact elevator system with a small space requirement can be provided overall.

The axes of rotation of the support rollers of the first and second drive body, the axis of rotation of the drive machine with the associated machine rolls and possibly the axis of rotation of the second drive machine or the deflection with the associated machine rolls are preferably aligned parallel to each other. This arrangement allows the use of support means in the form of carrying straps.
This space-saving arrangements can be realized.

Preferably, the support rollers of the first drive body in the upper area and / or arranged above the first drive body and the support rollers of the second drive body are arranged in the lower region of the second drive body and / or below the second drive body.
These possible designs allow for optimal placement of the prime mover and local space conditions can be well accommodated. This is particularly advantageous in modernizations, since in such projects, the rooms are given.

Preferably, the first drive body is a counterweight and the second drive body is an elevator car. The support rollers of the elevator car are preferably arranged below the elevator car, so that the support means are guided below the elevator car. This allows a space-saving design of the elevator system, as it has already been explained in the context of different suspensions. Of course, the first and the second drive body are exchangeable. This means that the first drive body can also be embodied as an elevator car and the second drive body as a counterweight, or it can of course also be designed both body as elevator car.

Preferably, the support means is a carrying strap, preferably a carrying strap with a poly-V ribbed driving surface, and the machine rolls of the driving machine and the carrying rollers of the two running bodies have a driving or guiding surface shaped according to a shape of the carrying belt. Such suspension means have good traction and allow small deflection radii. Thus, these straps allow a space-saving design.

Preferably, at least two parallel carrying means are used for supporting and driving the first and second driving bodies, and the driving machine includes two machine-roller sets. Each of the two machine roll sets each further includes a first machine roll and a second machine roll, and the two machine roll sets are disposed on the common axis of rotation of the prime mover. In particular, plant safety can thus be increased, since the drive bodies are supported by redundant suspension elements, and an introduction of force into the drive bodies can, for example, take place essentially symmetrically with respect to a guide plane of the two drive bodies.

Preferably, the strap or straps are always bent in the same direction in the course of the first attachment point to the second attachment point to the support rollers and machine rolls. This can be a lifetime of the strap optimized.

The prime mover, as it is preferably used for a previously described elevator installation, includes a drive motor and a first machine roll and a second machine roll. These are arranged on a common axis of rotation. Arranged on a common axis of rotation means that the machine rolls are arranged coaxially with one another so that they are arranged along the common axis. At least one of the first or second machine reel is provided with a drive surface for driving a support means, and this machine reel, which is provided for driving the support means, is non-positively connected to the drive motor.
In one embodiment, the other of the first or second machine roll is non-positively connected to the one drive motor. The connection is such that when driving the machine rolls by means of the drive motor, the peripheral speeds of the two machine rolls are different or at least may be different. The one drive motor is in the sense of a single drive motor thus simultaneously drives the first and the second machine role.

This is advantageous because by means of this solution, a driving force can be well introduced into the support means. A wrap angle can be chosen large.

Alternatively, the other of the first or second machine roll is arranged freely rotatable on the common axis of rotation. During operation of the elevator installation, a circumferential speed of the freely rotatable machine reel can thus be adjusted according to the speed of the suspension element which is guided over this freely rotatable machine reel. The other of the first or second machine roll is thus not motor driven.
This is advantageous because the prime mover can be made simple.

Preferably, in one embodiment, the first machine roll to a second machine roll different roll diameter, so that there is a corresponding to the roll diameter different peripheral speed of the two machine rolls. The two machine rolls can be connected via a drive axle, which is arranged on the common axis of rotation, directly, non-positively connected to the drive motor. The drive axle can be gearless driven by the drive motor or it can also be driven by a drive from the drive motor.

In another preferred embodiment of the drive machine one of the first or second machine roll is directly connected non-positively to the drive axis and the other of the first or second machine roll is non-positively connected by means of a transmission gear to the drive axis, so that a corresponding to a translation of the transmission gear different peripheral speed of the two machine roles result. Also in this embodiment, the drive axle can be gearless driven by the drive motor or the drive shaft can be driven by a drive from the drive motor.

By means of the different roller diameters or the transmission gear can be achieved the corresponding suspension peripheral speeds corresponding to the respective machine roles.

Preferably, the two driven machine rolls are coupled together with a viscous coupling or a differential gear or with a slip clutch. Thus, low speed differences, as they result from Tragmittelschlupf or expansions in the suspension means can be equalized. The slip clutch has a particularly good cost / benefit ratio, since speed differences only result from expansion and slip-related deviations. By means of differential gear, an entire driving force can be transmitted efficiently and evenly to the suspension elements. Thus, the support means can be spared and wear can be kept low.

Preferably, the prime mover comprises two first and two second machine rolls, wherein in each case one machine roll set consists of a first and a second machine roll and the drive motor is arranged centrally between the two machine roll sets. Thus, the elevator system with two separate Carrying means are operated. This increases the safety of the elevator installation, since in the case of failure of a suspension element, the running bodies of the elevator installation are still carried.

Of course, versions with more than two machine roll sets are possible. This allows elevator systems to be realized for larger loads.

In one embodiment variant, the drive motor is connected via a transmission, preferably a worm gear to the drive axle, and a motor axle of the drive motor is arranged essentially at right angles to the drive axle. In one embodiment, the motor axis of the drive motor is arranged substantially parallel to the drive axis and the motor axis is connected to a spur or belt drive to the drive axis. Alternatively, the motor axis of the drive motor is integrally assembled with the drive shaft and the drive motor drives the drive shaft gearless. Thus, a drive concept corresponding to the demand (space requirement, price, etc.) can be selected.

Figur 1:

eine schematische Gesamtansicht einer Aufzugsanlage;

Figur 2:

eine schematische Seitenansicht der Aufzugsanlage von Figur 1 mit der Aufzugskabine in einem obersten Haltebereich;

Figur 3:

eine schematische Seitenansicht der Aufzugsanlage von Figur 1 und 2 mit der Aufzugskabine in einem untersten Haltebereich;

Figur 4:

eine schematische Seitenansicht einer anderen Aufzugsanlage mit zwei Antriebsmaschinen;

Figur 5:

eine schematische Seitenansicht einer weiteren Aufzugsanlage mit einer Antriebsmaschine und einer Umlenkeinrichtung;

Figur 6:

eine schematische Seitenansicht eines anderen Beispiels einer Aufzugsanlage mit zwei zu einer Einheit kombinierten Antriebsmaschinen;

Figur 7:

eine schematische Seitenansicht eines fünften Beispiels einer Aufzugsanlage mit zwei Antriebsmaschinen;

Figur 8:

eine Ausführung einer Antriebsmaschine;

Figur 9:

ein schematisches Ausführungsbeispiel einer Antriebsmaschine mit einem Übersetzungsgetriebe zwischen Maschinenrollen;

Figur 10:

ein schematisches Ausführungsbeispiel einer Antriebsmaschine mit einer Kupplung zwischen den Maschinenrollen;

Figur 11:

ein schematisches Ausführungsbeispiel einer Antriebsmaschine mit einer freilaufenden Maschinenrolle;

Figur 12:

ein schematisches Ausführungsbeispiel einer Antriebsmaschine mit rechtwinklig angeordnetem Antriebsmotor und Getriebe.

Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with corresponding reference numerals. Show it:

FIG. 1:

a schematic overall view of an elevator system;

FIG. 2:

a schematic side view of the elevator system of FIG. 1 with the elevator car in a top holding area;

FIG. 3:

a schematic side view of the elevator system of FIG. 1 and 2 with the elevator car in a lowermost holding area;

FIG. 4:

a schematic side view of another elevator installation with two drive machines;

FIG. 5:

a schematic side view of another elevator installation with a prime mover and a deflection device;

FIG. 6:

a schematic side view of another example of an elevator system with two combined into one unit drive machines;

FIG. 7:

a schematic side view of a fifth example of an elevator installation with two drive machines;

FIG. 8:

an embodiment of a drive machine;

FIG. 9:

a schematic embodiment of a prime mover with a transmission between machine rolls;

FIG. 10:

a schematic embodiment of a prime mover with a coupling between the machine rolls;

FIG. 11:

a schematic embodiment of a prime mover with a free-running machine roll;

FIG. 12:

a schematic embodiment of a drive machine with right-angle drive motor and gearbox.

FIG. 1 shows an elevator system 1 with a prime mover 9 in a shaft 2. The FIGS. 2 and 3 show the elevator from FIG. 1 in a schematic side view and in different positions in the shaft 2. The elevator system 1 here includes a first drive body 3, which is designed as a counterweight 4, and it includes a second drive body 5, which is designed as an elevator car 6. The elevator car 6 and the counterweight 4 or the two drive bodies 3, 5 are arranged to be movable along guide rails 7. The elevator car 6 and the counterweight 4 are supported by support means 8 and connected to each other. A prime mover 9 carries and drives the support means 8 and thereby can move the two drive bodies 3, 5 in the shaft against each other. In the present example, two parallel strands of support means 8, 8.1, 8.2 are used, which extend substantially to the left and right of a plane determined by the guide rails 7 of the elevator car 6 level. Of course, there are a number of the required strands of suspension elements from the elevator data, such as existing elevator masses and transport weights, type of support means or delivery height, etc. The type of arrangement of the multiple strands is determined by the expert.

In the example according to FIG. 1 is the counterweight 4 and the first drive body 3 connected to a 4: 1 suspension to the prime mover 9 and the elevator car 6 and the second drive body 5 is connected to a 3: 1 suspension to the prime mover 9. 4: 1 suspension is here understood to mean that a suspension element 8.1 carries the relevant carriage 3, 5 via four sections. A tensile force in the support means 8 is thus a quarter of the load capacity of the entire suspension element strand 8.1. Accordingly, in a 3: 1 suspension, the tensile force in the suspension element 8 is one third of the load capacity of a suspension element strand 8.2. The type of suspension translation can of course be changed. Depending on the requirements, it can be chosen to be the same for the two driving bodies or it can be chosen differently, as in the present example. On special effect of the given Distribution will be discussed later.

The support means 8 is now attached at one end to a first fixed attachment point 37 in the shaft 2 of the elevator installation 1. The support means forces can be introduced in a known manner via mounting bracket in the guide rails 7, they can be introduced into the shaft wall or in a shaft ceiling or in a console or a machine frame of the engine 9. From the first fixed attachment point 37, the support means 8 is guided to the counterweight 4 or to the first drive body 5 or to a first carrying roller 33 of the first drive body 4. From there it is guided back to the drive machine 9, where it wraps around a first machine roll 18, 19. Next, the support means is again guided back to a second support roller 34 of the first drive body 4 and from there again to the drive machine 9, where it wraps around a second machine roll 20, 21 of the drive machine 9. At least one of the machine rolls 18, 19, 20, 21 is designed as a machine drive roller 14 and it can drive the support means 8. The peripheral speed of the second machine roll 20, 21 of the prime mover 9 in this case corresponds approximately to twice the peripheral speed of the first machine roll 18, 19. And the peripheral speed of the first machine roll 18, 19 corresponds approximately to twice the linear speed of the first drive body 4. Thus, the first drive body 4 connected by means of 4: 1 suspension to the prime mover 9.
Embodiments of drive machines 9 as they can be used for the present arrangement are in the embodiments of the FIGS. 8 to 12 shown.

Next, the support means 8 is now guided by the second machine roll 20, 21 of the drive machine 9 to a first support roller 33 of the second drive body 5 and the elevator car 6. In the present embodiment, the first support roller 33 is disposed below the elevator car 6 and it is divided into two rollers 33.1 and 33.2, which are arranged on the two-sided side regions of the elevator car 6. The support means 8 can thus be guided below the elevator car 6 to an opposite side of the elevator car. From there, the support means 8 is guided to a deflection roller 32, which is arranged in the shaft 2. Next, the support means is guided by the guide roller 32 to the elevator car 6 where it by means of a mounting point 39 on the second drive body fifth or is attached to the elevator car 6. Thus, the second drive body 5 is connected or supported by means of a 3: 1 suspension to the prime mover 9.

In FIG. 2 which an operating situation of the elevator system of FIG. 1 represents the elevator car 5, 6 at the upper end of their driving range. The counterweight 3, 4 is accordingly at the lower end of its travel range or approximately at the bottom in the shaft 2. In FIG. 3 is the elevator car 5, 6 at the lower end of their driving range, that is approximately at the bottom of the shaft 2. The counterweight 3, 4 is accordingly at the top of his driving range. However, the counterweight had to travel a smaller distance because it is connected to the drive machine 9 by means of a 4: 1 suspension, while the elevator car is suspended by means of a 3: 1 suspension. Above the counterweight 3, 4 is therefore a residual area corresponding to approximately one quarter of the travel of the elevator car. This residual area can now ideally be used, on the one hand to minimize a diagonal train in the suspension element or possibly to arrange shaft installations such as a controller, an inverter, battery packs or other.
A diagonal pull in the support means inevitably results in the embodiment shown, since the support means must be moved laterally by at least one width of the support means at two times guiding between counterweight 3, 4 and drive machine 9. In the embodiment shown, both in the elevator car 5, 6, as in the counterweight 3, 4, a large distance between support rollers 33, 34 and machine rollers 18 to 21 easily accessible.

In the embodiment according to FIG. 4 are in contrast to the previous embodiments, the support rollers 33, 34 of the first drive body 3 and the counterweight 4 arranged below the drive body. The support means 8 are accordingly guided next to the counterweight 4. The counterweight can of course also be provided with corresponding lateral channels or depressions. Furthermore, a second drive machine 27 is arranged in the upper region of the shaft or in an engine room 2c lying in an extension of the shaft, and further carrier rollers 33, 35 are arranged in the elevator car. The support means 8 is thus performed starting from the second machine roll 20 of the prime mover 9 to the third machine roll 30 of the second drive machine 27 (corresponding to the second machine roll 20 of the prime mover 9) and extends from there to the second support roller 35 of the second drive body 5 and the elevator car 6. From the elevator car 6, the support means 8 is guided back to the drive machine 27 where it wraps around a fourth machine roll 31 (corresponding to the first machine roll 18 of the drive machine 9). Further, it runs once again to the elevator car 6, wraps around the first support roller 33 and is finally guided to a second fixed attachment point 38 and thus fixed in the shaft 2 and in the embodiment shown on the drive machine 27. In the present embodiment, therefore, both carriage 3, 5 are suspended in a 4: 1 suspension. In the example, an intermediate floor 2 a separates the machine room 2 c with the drive machines 9, 27 from the underlying driving area of the shaft. The second drive machine 27 is raised so that a minimum distance between the machine rollers 30, 31 and the support rollers 33, 35 of the elevator car 6 can be achieved. The embodiment with machine room 2a is advantageous, for example, in conversions, if already existing engine rooms can be used.

In the FIGS. 1 to 4 the guide rails 7 are arranged such that two guide rails 7 of the counterweight 4 and a guide rail 7 of the elevator car 6 extend on one side of the elevator car 6, while another guide rail 7 of the elevator car 6 extends on another side of the elevator car 6.

In the embodiment according to FIG. 5 are used in contrast to the previous embodiment instead of the second drive machine 27, a deflection 28, the fixed attachment points 37, 38 are fixed to the false ceiling 2a, the prime mover 9 is raised and the support rollers of the first drive body 3 are as in the embodiment of FIG. 1 arranged above the driving body. In FIG. 5 the guide rails 7 of the counterweight 4 and the elevator car 6 are arranged in parallel planes to each other.

Also in the embodiment according to FIG. 6 both carriages 3, 5 are suspended in a 4: 1 suspension. In contrast to FIG. 4 However, the support rollers 33, 35 of the second drive body 5 and the elevator car 6 are arranged laterally of the elevator car 6 in the vicinity of the lower boundary of the elevator car. The two drive machines 9, 27 are brought together to form a unit and all the guide rails 7 are arranged on one side of the elevator car 6. The elevator car 6 is guided in a so-called backpack arrangement. With this Execution can always ensure a large distance between machine rolls and idlers. Thus, a diagonal tension, which results from the double wrapping of the machine rolls, be minimized. Furthermore, a load of the drive machines 9, 27 can be introduced into all guide rails 7. Of course, in this embodiment, one of the drive machines 9, 27 may be designed only as a deflection unit. Between drive unit 9, 27 and shaft 2, as shown, the intermediate bottom 2a may be arranged. But the intermediate bottom 2a can also be omitted, creating a machine room-less elevator arises.

In the embodiment according to FIG. 7 is different from FIG. 6 the second drive machine 27 is arranged as a separate unit on the opposite side of the counterweight of the elevator car 6. The support means 8 traverses above the elevator car 6 the shaft 2. Also, the guide rails 7 in the originally in the FIGS. 1 to 4 shown executed arrangement.

The arrangements shown are of course combinable. In all embodiments, false ceilings 2a for the design of a machine room are possible, the fixed attachment points 37, 38 may be connected to rails to walls, ceilings or to the prime mover 9, 27 or deflection device 28. The deflection device 28 can also be embodied as a drive machine or the drive machines 9, 27 as deflection devices. At least one prime mover must of course be present in the elevator system. This could of course be distributed in principle in any of the carrying or diverting pulley or on all. The type of leadership of the vehicle is not explained here.

Various drive machines 9, 27 are now presented below, as they can be used in the lift systems explained above. FIG. 8 shows a basically known drive machine, as already in the publication EP1400479 was made known. The drive machine 9, 27 includes a motor 23 with a motor axis 24. It is a gearless machine, that is, the motor shaft 24 also forms a common axis of rotation 15 on the machine rollers 18, 19, 20, 21, 30, 31 are arranged are. These are used for carrying and driving the two driving bodies 3, 5 or the suspension means 8. The machine rolls 18, 19, 20, 21, 30, 31 are divided into two machine roll sets 13. Between the two machine roll sets 13, a center bearing 12 is arranged, which receives a main load of the prime mover. The prime mover also includes a brake 26 for holding the cars in a stop position. The prime mover 9, 27 is mounted on a bracket 10. By means of the console 10, the prime mover 9, 27 can be arranged and secured in the elevator installation. Unlike the one in the publication EP1400479 However, shown drive machine has in FIG. 8 shown embodiment machine rollers 18, 19, 20, 21, 30, 31 with different diameters, so that there are different peripheral speeds for the machine rolls during operation. The first and the fourth machine rollers 18, 19 31 are in the embodiment firmly connected to the common axis of rotation 15 or incorporated into this and the second and the third machine rollers 20, 21 30 are connected by a slip clutch 17 with the common axis of rotation 15. These second and third machine rolls 20, 21, 30 have twice the diameter in comparison to the first and fourth machine rolls 18, 19, 31, respectively, resulting in approximately twice the circumferential speed during operation. The suspension element 8 can, as explained in the comments on previous figures, in a 4: 1 Aufhänguung to the cars 3, 5 are connected. The machine rolls are all provided with driving surfaces, so that a sufficient driving force can be transmitted to the suspension element. Since the length of the suspension element between the driving body and the drive machine can change due to slippage and stretching due to a travel path, small travel and speed shifts between the machine rollers can result. These are compensated by the slip clutch 17.

FIG. 9 shows the prime mover of FIG. 8 in a schematic representation, wherein in this embodiment, the motor 23 is arranged together with the brake 26 between the two machine roll sets 13.

FIG. 10 shows a modification of the prime mover of FIG. 9 , The second machine rolls 20, 21 and the third machine roll 30 are connected via a differential gear 16 with the first and fourth machine rolls 18, 19, 31. The differential gear 16 couples the machine rollers together so that an average speed is maintained. Displacement and velocity shifts can thus be compensated. For example, the differential gear may be in the form of a "crown gear".

FIG. 11 shows a further possible embodiment of a prime mover 9, 27. In contrast to the previous examples, all machine rollers 18, 19, 20, 21 30, 31 of the prime mover 9, 27 in approximately the same diameter. However, the first machine rollers 18, 19 are mounted on a free-running bearing on the common axis of rotation 15. The motor 23 thus drives only the second machine roll 21, 20 and the speed of the first machine rolls 18, 19 necessarily results from a running speed of the support means 8.

FIG. 12 shows a further possible embodiment of a prime mover 9, 27. Here, the motor 23 and the motor shaft 24 is arranged at right angles to the common axis of rotation 15. Preferably, the motor 23 is approximately at right angles to the axis of rotation 15. Advantageously, it protrudes substantially vertically upwards, so that the drive in the whole claimed little cross-sectional area. The motor acts on the axis of rotation 15 via a gear 25, for example a worm gear or a bevel gear. The arrangement of the machine rolls can be selected analogously to the previously described embodiments.

The illustrated engines 9, 27 are variier and can be combined. The motor 23 may be disposed on one side of the machine rolls, and of course several sets of machine tools are possible, depending on a number of required strands of support means. The design of the elevator systems is variable. Thus, for example, in the embodiments according to FIGS. 1 to 3 a false ceiling 2a be retracted, so that a small machine room 2a is formed. Other suspension or capping factors are possible. The invention is not limited to the described embodiments and the abovementioned modifications. The arrangements of the support rollers 33, 34, 35 are variable as needed and optimum space utilization. In one embodiment, two motors 23 may also be used, with a first motor driving the first machine roller 18, 19 and a second motor driving the second machine roller 20, 21. In this case, a driving force can be controlled in the suspension element as needed by controlling the two motors.

Claims (17)

1. A drive machine (9, 27) for an elevator system (1) comprising
   a drive motor (23),
   a first machine pulley (18) and a second machine pulley (20), arranged on a common rotational axis (15), wherein at least one of the first machine pulley (18) or the second machine pulley (20) is provided with a driving surface to drive a support means (8) and said machine pulley (18, 20), which is provided for driving the support means (8), is connected to the drive motor (23) in a frictionally locked manner, characterized in that
   the other of the first or second machine pulley (20, 18) is also connected to the drive motor (23) in a frictionally locked manner, wherein when driving the machine pulleys (20, 18) by means of the drive motor (23), the circumferential speeds of both machine pulleys (20, 18) are different, or the other of the first or second machine pulley (20, 18) is arranged in a freely rotatable manner on the common rotational axis (15), so that a circumferential speed of the freely rotating machine pulley (20, 18) may be different from the circumferential speed of the machine pulley (18, 20) which is connected to the drive motor (23) in a frictionally locked manner.
2. The drive machine (9, 27) for an elevator system (1) according to claim 1, characterized in that the first machine pulley (18) has a different diameter to the second machine pulley (20), resulting in a different circumferential speed of the machine pulleys (18, 20) corresponding to the diameter of the pulley, wherein
   both machine pulleys (18, 20) are arranged on a common rotational axis (15) and are connected to the drive motor (23) in a frictionally locked manner, and
   the common rotational axis (15) is driven directly or by means of a gearbox (25) by the drive motor (23).
3. The drive machine (9, 27) for an elevator system (1) according to claim 1, characterized in that one of the first machine pulley (18) or the second machine pulley (20) is directly connected to the common rotational axis (15) in a frictionally locked manner and the other of the first or second machine pulley (20, 18) is connected to the common rotational axis (15) by means of a transmission gear (16) resulting in a different circumferential speed of the machine pulleys (20, 18) corresponding to the transmission ratio of the transmission gear (16), wherein the common rotational axis (15) is driven directly or by means of the gearbox (25) by the drive motor (23).
4. The drive machine (9, 27) for an elevator system (1) according to any of claims 1 to 3, characterized in that the drive machine (9, 27) comprises two first machine pulleys (18, 19) and two second machine pulleys (20, 21), respectively, wherein each machine pulley set (13) comprises a first machine pulley (18, 19) and a second machine pulley (20, 21), and the drive motor (23) is centrally arranged between the two machine pulley sets (13).
5. The drive machine (9, 27) for an elevator system (1) according to claim 4, characterized in that the drive motor (23) is connected to the common rotational axis (15) via the gearbox (25), and a motor axis (24) of the drive motor (23) is substantially parallel or perpendicular to the common rotational axis (15),
   or
   in that the motor axis (24) of the drive motor (23) is integrally assembled with the common rotational axis (15), and the common rotational axis (15) is directly driven by the drive motor (23).
6. An elevator system (1) with a first travelling body (3) and a second travelling body (5), comprising at least one support means (8) for supporting both travelling bodies (3, 5), and comprising at least one drive machine (9) for driving the at least one support means (8) and both travelling bodies (3, 5), wherein
   both travelling bodies (3, 5) comprise at least a first support pulley (33) and the support means (8) at least partially supports the travelling bodies (3, 5) by means of these support pulleys (33), wherein,
   the drive machine (9) comprises at least a first and a second machine pulley (18, 20), arranged on a common rotational axis (15) of the drive machine (9), wherein at least one of said first or second machine pulley (18, 20) is a machine drive pulley (14) for driving the support means, characterized in that
   the support means (8) is guided from the first travelling body (3) to the second travelling body (5) via the first machine pulley (18) and the second machine pulley (20), and
   the machine pulleys (18, 20) have different circumferential speeds during movement.
7. The elevator system (1) according to claim 6, characterized in that
   the elevator system (1) comprises a second drive machine (27) or a diverting device (28) with a third machine pulley (30) and a fourth machine pulley (31), arranged on a common rotational axis of the second drive machine (27) or the diverting device (28), and wherein the support means (8) is guided at least also via the third machine pulley (30) and fourth machine pulley (31) on its way from the first travelling body (3) to the second travelling body (5), and wherein the circumferential speeds of the third machine pulley (30) and the fourth machine pulley (31) are different.
8. Elevator system (1) according to claim 6 or 7, characterized in that
   at least the first travelling body (3) comprises a second support pulley (34), and the support means (8) is guided in a 4:1 suspension to the first travelling body (3) or to its support pulleys (33, 34), wherein the support means (8) is guided from a first stationary anchoring point (37) in a shaft (2) of the elevation system (1) to the first support pulley (33) of the first travelling body (3), and is further guided from there to the first machine pulley (18) of the drive machine (9) and is guided back from there to the second support pulley (34) of the first travelling body (3), and
   is then guided from there to the second machine pulley (20) of the drive machine (9),
   and wherein the circumferential speed of the second machine pulley (20) of the drive machine (9) approximately corresponds to the circumferential speed of the first machine pulley (18).
9. The elevator system (1) according to claim 8, characterized in that
   furthermore, the second travelling body (5) also comprises a second support pulley (35), and that the support means (8) is guided in a 4:1 suspension to the second travelling body (5) or to its support pulleys (33, 35),
   the support means (8) is guided further from the second machine pulley (20) of the drive machine (9) to the fourth machine pulley (31) of the second drive machine (27) or the diverting device (28),
   the support means (8) is guided further from there to the second support pulley (35) of the second travelling body (5),
   the support means (8) is guided back from there to the second drive machine (27) or to the diverting device (28) and over its third machine pulley (30),
   the support means (8) is guided further from the third machine pulley (30) to the first support pulley (33) of the second travelling body (5), and finally
   the support means (8) is guided further from the first support pulley (33) of the second travelling body (5) to a second stationary anchoring point (38) of the support means (8) in the shaft (2) and is secured in this position.
10. The elevator system (1) according to claim 8, characterized in that
    the second travelling body (5) comprises an anchoring point (39) for securing the support means (8), and the second travelling body (5) is arranged in a 3:1 suspension.
11. The elevator system (1) according to any of claims 6 to 10, characterized in that
    the rotational axes of the support pulleys (33, 34, 35) of the first travelling body (3) and the second travelling body (5), the rotational axis of the drive machine (9) with the accompanying machine pulleys (18, 19, 20, 21), as well as, if need be, the rotational axis of the second drive machine (27) or the diverting device (28) with the accompanying machine pulleys are arranged in parallel to each other.
12. The elevator system (1) according to any of claims 6 to 11, characterized in that
    the support pulleys (33, 34) of the first travelling body (3) are arranged in the upper area of and/or above the first travelling body (3), and
    the support pulleys (33, 35) of the second travelling body (5) are arranged in the lower area of the second travelling body (5) and/or below the second travelling body (5).
13. The elevator system (1) according to any of claims 6 to 12, characterized in that the first travelling body (3) is a counterweight (4) and that the second travelling body (5) is an elevator cabin (6), wherein the support pulleys (33, 35) of the elevator cabin (6) are arranged below the elevator cabin (6), so that the support means (8) is guided below the elevator cabin (6).
14. The elevator system (1) according to any of claims 6 to 13, characterized in that the support means (8) is a support belt, preferably a support belt comprising a Poly-V ribbed drive surface, and the machine pulleys (18, 19, 20, 21) of the drive machine (9, 27) and the support pulleys (33, 34, 35) of both travelling bodies (3, 5) have a drive or guide surface corresponding to the form of the support belt (8), preferably corresponding to the Poly-V ribbed drive surface of the support belt.
15. The elevator system (1) according to claim 14, characterized in that
    at least two parallel running support means (8, 8.1, 8.2) are used for supporting and driving the first and second travelling bodies (3, 5), and the drive machine (9, 27) comprises two machine pulley sets (13), wherein the two machine pulley sets (13) each comprise a first machine pulley (18, 19) and a second machine pulley (20, 21), and wherein said machine pulley sets (13) are arranged on the common rotational axis (15) of the drive machine (9, 27).
16. The elevator system (1) according to any of claims 14 to 15, characterized in that
    the support belt(s) (8) while being guided from the first anchoring point (37) to the second anchoring point (38) are always curved in the same direction around the support pulleys and machine pulleys.
17. A method for driving at least a first travelling body (3) and a second travelling body (5) of an elevator system (1) by means of a drive machine (9, 27), wherein the drive machine comprises at least a first machine pulley (18) and a second machine pulley (20), which are arranged on a common rotational axis (15),
    characterized in that

    - the travelling bodies of the elevator system are connected with both machine pulleys (18, 20) of the drive machine by at least a support means (8),

    - the support means (8) is guided starting from a first stationary anchoring point in the shaft to a first support pulley (33) of the first travelling body (3),

    - the support means (8) is guided further from the first support pulley (33) to the first machine pulley (18) of the drive machine which is, at least partially, wound around by the support means (8),

    - the support means (8) is guided back to a second support pulley (34) of the first travelling body (3), and

    - the support means (8) is guided further to the second machine pulley (20) of the drive machine which is also at least partially wound around by the support means (8).

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