Device for aligning the position of the electric motor to the position of the driving drum of a direct drive used for a belt conveyor system A reference herein to a patent document or other matter which is given as prior art is not to be taken as an admission that that document or matter was known or that the information it contains was part of the common general knowledge as at the priority date of any of the claims. The invention relates to a device for aligning the position of an electric motor to the position of the driving drum of a direct drive used with a belt conveyor system. The device can consist of a separate support frame for holding the electric motor and the belt conveyor system's connection and adjustment elements that are arranged in between this support frame and the support structure that holds the driving drum. In this case a direct drive refers to a drive that is directly connected to the electric motor without the need to use gears to interconnect it to the driving drum. The above-noted support frame is connected to the support structure in such a way that the alignment of the position of the electric motor with the position of the driving drum can be realised in order to create economical and dynamic conditions through a power transfer from the electric motor to the driving drum. This type of detachment between the support frame and the support structure is especially suited for belt conveyor systems that have been designed for high performance and are fitted with gearless drive systems. In this case high performance refers to a system design requirement of at least 2,500 KW or more. This belt conveyor system's drive support frame and its alignment options are equally suited for both the initial alignment of the drive as well as for any changes to the kinematic conditions, such as conveyor belt misalignment that might occur later on or after inspection work has been carried out, whereby the position of the drive can be aligned relative to the position of the driving drum's drive shaft. Belt conveyors are used in open-cast mining as a continuous conveyor for transporting loose bulk material such as excavated materials and raw materials. In particular, long belt conveyors that cover ascending distances of several kilometres are highly stressed. 1 High drive power is typically needed in these applications. If the motor size exceeds a rating of approx. 2,500 kW then a gearless drive can be used as an alternative to the classic drive. The drive shaft journal is connected to the drive motor in this case. The motor's stator is fitted with separate bearings. It is preferable that its fundaments are suitable for stator movements. If the driving drum's shaft becomes severely deformed as the result of heavy loads or if it becomes necessary to change the position of the driving drum due to revision work having been carried out on the belt conveyor system, then the position of the drive motor must be realigned to the new position of the driving drum's shaft. The drives and construction for belt conveyor systems for transporting bulk materials are described in the Association of German Engineers (VDI) Directive 3602 (draft) "Gurtf6rderer for SchOttgut; Antriebe und Bauarten" [belt conveyors for bulk material; conveyor drives and construction] issued in January 2001. A gear/motor combination is shown in Fig. 10 as an example of a classic belt conveyor drive, which is mounted on a common frame (swing arm). This swing arm is connected to the belt conveyor's frame. As the geared drive and the drive shaft are rigidly connected to one another, it is necessary that drive movements, which result from the belt traction conditions that cause the deformation of the drive shaft when the conveyor is working, are eliminated by an elastic connection fitted between the drive frame and the surrounding steel structure. In general, a flexible torque support can be used to realise this. An alternative possibility to the mounting of the drive on a swing arm with a rigid rotating connection between the drum and the drive and a flexible support for the complete drive on a steel structure is also a rigid mounting of the drum and the drive on the steel structure or on the fundaments. With this type of drive configuration the coupling can eliminate any minor shaft misalignments that are transferred by the torque. If relatively big positional changes make it necessary to realign the drive position to match the changed position of the driving drum's shaft, then the connection between the drive and the swing arm will be temporarily disengaged and the required alignment of the drive position can then be realised by the use of intermediate inserts. This type 2 of alignment is time consuming and the increase in drive sizes make it more difficult to implement. Leaflet DE 27 31 547 Al lists a drive station for belt conveyors with a swing arm mounting. The drive, consisting of an electric motor and a gear, is housed on a platform that moves in a swivel axis opposite the belt conveyor's support frame. The platform's swivel axis and the driving drum's drive shaft are mounted in parallel to one another and at a specific distance apart as well. Two torsionally rigid perforated plates are affixed to the belt conveyor's support frame in parallel to one another so that the platform can be swivelled in-between them. The holes ensure that they can be mounted in a common arc on the swivel axis. As the platform's swivel axis does not coincide with the drive shaft's longitudinal axis, the drive shaft position of the gear mounted on the platform will change relative to the position of the belt conveyor's driving drum's drive shaft when the platform is swivelled. When the position where the gear's drive shaft and the driving drum's drive shaft axis have reached the point of closest proximity to one another, the platform can be fixed in this position by inserting the bolts in the relevant holes. The free end of the platform will then lie on these bolts. As the swivel axis and the drive shaft are now apart from one another, all that is needed to correct the position is a movement option for the electric motor against the gear on the platform. This is ensured by the series of holes in the surface of the platform provided for affixing the drive after the incremental movements. The drive can be bolted in the final position after it has been moved. More precise alignment can be realised earlier by sliding inserts of different thicknesses between the platform and the feet of the drive that consists of the electric motor and the gear. This position adjustment option version for the drive against the belt conveyor's driving drum is especially suited for small and medium-sized system versions. The arrangement described above is not suitable for use with gearless drives. A specific form of the present invention provides a device for aligning the position of an electric motor to the position of the driving drum of a direct drive used with a belt conveyor system, wherein the driving drum is mounted on a support structure being aligned with the electric motor mounted on a support frame, and two connection and adjustment elements are fitted in between the support frame and the support structure 3 and these connection and adjustment elements take the form of a wedge box and a joint. The invention forms the basis of using such a technical solution for creating the alignment capability for aligning the belt conveyor system drive with a gearless drive, whereby the working or maintenance-dependent positional changes of the drive elements relative to one another considerably simplify the alignment work needed between the driving drum and the drive motor and this also enables the drive motor to be readjusted in relation to the driving drum later on. This task is undertaken by sub-dividing the drive frame into a support structure for easy aligning and stable positioning of the driving drum and a support frame for holding the electric motor, whereby the support structure for the driving drum forms the basic structure, and the support frame for the electric motor is connected to the base structure and its position can be adapted/adjusted relative to the other frame. This creates the technical conditions for four different adjustment options. The four adjustment options are: - moving the electric motor's support frame against the support structure that holds the driving drum parallel to the drive axis; - moving the electric motor's support frame against the support structure that holds the driving drum parallel to the conveyor's longitudinal axis; - moving the electric motor's support frame against the support structure that holds the driving drum in the vertical direction; - swivelling the electric motor's support frame against the support structure that holds the driving drum parallel to the conveyor's longitudinal direction axis up or down. These four adjustment options can also be combined in different variations. Two connection and adjustment elements have to be fitted between the support frame holding the electric motor and the support structure holding the driving drum in order to realise the above-mentioned adjustment variations. Each of these connection and adjustment elements consist of a wedge box, which is connected to the support frame by a joint and to the support structure by threaded bolts. A ball joint is especially 4 suitable for use as the joint, as the socket joint is fitted on the connecting component and the ball joint is fitted on the swing arm. The use of two connection and adjustment elements with these ball joints makes compensating for the misalignment of the support frame particularly beneficial as this enables the different variants of the previously mentioned adjustment options to overlap one another. The socket joint has a foot that has a flat base and a square border. The wedge box is connected to the foot of the ball joint. According to a particular embodiment of the invention, the wedge box may consist of a square baseplate, which holds the first frame. There may be a wedge package within this frame, which consists of a wedge that can be moved by an adjustment screw and another non-moveable wedge. The sloping planes of each wedge are positioned so that one slides along the other. The straight, oppositely aligned level surface of one of the wedges is supported by the baseplate and the straight, oppositely aligned level surface of the other wedge is supported by the base of the foot of the socket joint. The distance between the baseplate and the socket joint can be changed by simply moving one of the wedges. A second frame lies on the first frame, which holds the four aligned together wedge packages inside the square. Each of these wedge packages consists of a non moveable wedge that is aligned with another wedge that can be moved by an adjustment screw. The sloping planes of each of the wedge packages or pair of wedges are also positioned so that one slides along the other. The straight, oppositely aligned surfaces of one group of wedges is supported by the frame and the straight, oppositely aligned surfaces of the other groups of wedges are supported by the outer surface of the foot of the socket joint. Adjustment screws are provided so that the moveable wedge in a wedge package can be moved. In order to ensure that the moveable wedge can be moved in the required direction by these adjustment screws, two threaded holes have been provided in the frame for each adjustment screw so that one of the two can be used in a direction-dependent way for adjusting the respective wedge. Threaded bolts are used to connect the wedge box to the support structure that holds the driving drum, whereby one end is screwed into the support structure and the 5 wedge box with the baseplate, the first and second frames as well as the foot of the socket joint are held by the centre of the bolts and nuts are used to hold the detachable wedge box with the socket joint in place on the support structure. The relevant adjustment screw and respective threaded bolt are used to adjust the height of the socket joint or move it sideways. The socket joint must be loosened before it is connected to the support structure so that it can also be moved in the correct direction. The adjustable wedge can be moved back in the movement direction afterwards and the other oppositely aligned wedge can also be adjusted afterwards. The threaded bolts can be tightened up after the adjustment process has been completed and the support frame will then be affixed to the support structure once again. The second frame is connected to the steel structure on both sides so that the wedge box is still held in place even when it is loose. Adequate play must be present on both sides of the wedge packages in order to ensure that the foot of the socket joint can move in the drum's drive shaft longitudinal direction without being obstructed by any of the four wedge packages that surround the foot of the socket joint. One or more height-adjustable torque supports can be fitted underneath the support frame. This will ensure that the slope of the support frame can be adjusted in its swivel axis. With regard to the torque support(s), it is preferred that all degrees of freedom for the support frame holding the electric motor are blocked off and that they are rigidly secured in their positions. The invention will be explained in greater detail in the following pages using an application example for repositioning the driving drum on the adapted support frame holding the a belt conveyor system drive. The associated diagrams show: 6 WO 2014/072331 PCT/EP2013/073142 Fig. 1 - a drive unit for a belt conveyor system with a side view of the driving drum and the electric motor, Fig. 2 - a side view of the electric motor fitted on the adjustable support frame, Fig. 3 - a side view of the adjustable support frame together with the electric motor, Fig. 4 - a perspective representation of the adjustable support frame together with the connection elements for the drive frame and the driving drum, Fig. 5 - a side view of the adjustable support frame together with the connecting elements, Fig. 6 - a top view of the adjustable support frame together with the connecting elements, Fig. 7 - X detail as per Fig. 5, Fig. 8 - Y detail as per Fig. 6, Fig. 9 - sectional view A - A as per Fig. 7, Fig. 10 - sectional view B - B as per Fig. 7, Fig. 11 - sectional view C - C as per Fig. 7, Fig. 12 - sectional view D - D as per Fig. 8. The drawing shown in Fig. 1 is of a very robust drive unit, as it will be used with a belt conveyor system designed for transporting heavy loads. Therefore the complete design of the conveyor system must be extremely robust. The belt conveyor's drive head consists of driving drum 1 with drum drive shaft 2 protruding on both sides. Drum drive shaft 2 is held by two bearing blocks 3 & 4. Bearing blocks 3 & 4 are connected to the belt conveyor's drive frame 7 by bearing block holders 5 & 6 affixed to fundament 9. Driving drum 1 and drum drive shaft 2 can be adjusted using bearing block holders 5 & 6, which means that they can be adjusted into any working position. A slowly rotating electric motor is attached at one end of driving drum 1. It is also possible to attach a second electric motor 8 of the same type to the other end of the drum. Electric motor 8 can either be connected to the motor's output shaft 10 via coupling 18 as shown in Fig. 2 or else drum drive shaft 2 can protrude into the rotor where drum drive shaft 2 and motor output shaft 10 can be directly :7 WO 2014/072331 PCT/EP2013/073142 connected to one another. It is preferable to use this type of rigid coupling between the rotor and drum drive shaft 2 with bearingless direct drives. If a direct drive is used with bearings then an elastic coupling 18 (Fig. 1) that will simultaneously compensate the angle must also be used. The third motor bearing option for direct drives would be if the outer end of motor output shaft 10 that is connected to the rotor was extended as a bearing journal and held in place by support bearing 12. This type of support bearing 12 is shown in Figs. 1 and 2. Fig. 1 and Fig. 2 differ as shown by the second support bearing 12 that holds motor output shaft 10 at the side of driving drum 1. A membrane coupling 18 is used here to provide the connection between drum shaft 2 and motor output shaft 10. Electric motor 8 (with or without bearing 12) is affixed to a separate support frame 13 in each of the three described motor bearing variants (bearingless motor; motor with two bearings 12 as shown in Fig. 2; motor bearing using membrane coupling 18 and support bearing 12 as shown in Fig. 1). This type of support frame 13 is shown in the drawings in Figs. 3 to 6 in detail in the different views. Motor output shaft 10 and drum drive shaft 2 are shown with a common rotational axis 15 in Fig. 1. As one end of the rotor in the slowly rotating electric motor 8 is connected to drum drive shaft 2, supported at one end by the belt conveyor system's support structure 7 and at the other end by the bearing journal on the support bearing 12 affixed to support frame 13, the air gap between the rotor and stator in electric motor 8 changes in relation with relative movement of driving drum 1 together with that of drum drive shaft 2 and electric motor 8. Such changes occur when the belt conveyor system is loaded by the materials being transported. They can also occur if the position of driving drum 1 in relation to electric motor 8 is changed as the result of inspection work carried out on the belt conveyor system. This can occur, for example, during repairs or when renewing the belt straps. Adjustment of the driving drum 1 axis might also be needed in order to correct any conveyor belt misalignment. In such cases position deviations between the driving drum 1 and electric motor 8 and restraints or changes to the air gap in electric motor 8 must be avoided and an appropriate coupling must be used in the case of motors with two bearings 11 & 12 as shown in Fig. 2 or if using the membrane solution, which will 8 WO 2014/072331 PCT/EP2013/073142 eliminate relative movement between one another up to a specific size. If position changes continue to occur and a bearingless motor 8 is being used then the drive will have to be repositioned. This can be realised with the help of this invention as the position of support frame 13 is shown in detail in Figs. 3 to 6 with electric motor 8 opposite support frame 7 of the belt conveyor system that can be changed at four levels. - The first option for changing the position of support frame 13 against support structure 7 is to move support frame 13 along drive axis 15. - The second option for changing the position of support frame 13 against support structure 7 is to move support frame 13 in the direction of the conveyor's longitudinal axis 14. - The third option for changing the position of support frame 13 against support structure 7 is to move support frame 13 in the vertical direction to drive axis 15. - The fourth option for changing the position of support frame 13 opposite support structure 7 is to move support frame 13 up or down so that the joint axis is parallel to the conveyor's longitudinal axis 14. These four adjustment options can also be combined in different variations. In order to ensure that these four adjustment options and the overlapping of these four adjustment options can be constructively realised in different variants between support structure 7 and support frame 13, two appropriate connection and adjustment elements 16 have been fitted and aligned at a specific distance from one another between the two steel constructions 7 & 13. These connection and adjustment elements 16 and their connections to support frame 13 are shown in detail in the following drawings in Fig. 4. One end of each of these connection and adjustment elements 16 is connected as shown in Figs. 9 & 12 to support frame 13 and the options for affixing the opposite end to support structure 7 are shown in Figs. 4 to 12. These affixing options have been optimised for the specific 9 WO 2014/072331 PCT/EP2013/073142 constructive design of support structure 7 and connecting elements 16. However, a feature of this invention is that with this affixing option the individual parts of the connecting and adjustment elements 16 can be kept together as a package, as this affixing option is detachable and can be loosened during the adjustment process so that socket joint 17a can be moved in the planned direction during the adjustment. The implementation example shows four threaded bolts 19 being used, whereby one end is screwed into support structure 7 and nuts 20 are used at the other ends to hold connection elements 16 and their socket joints on the feet. In order to be able to arrange jointed connection 17 with support structure 7, connection element 16 is fitted with a socket joint 17a, as shown in Figs. 9, 10 and 12, which holds ball joint 17b, which is also held by support structure 7. The four threaded bolts 19 are pushed up to the foot of socket joint 17a and as described above, one end is screwed into support structure 7 and securing nuts 20 are used at the other end to make a functional connection with socket joint 17a. Adequately sized drilled holes or sleeves with sufficiently large internal diameters have been provided so that the four threaded bolts 19 do not restrict the movement range of the two connection and adjustment elements for aligning to the changed position of support frame 13 when the nuts 20 are loose. This enables support frame 13 to be swung up or down during the planned use of the two connection and adjustment elements 16 opposite support structure 7 with driving drum 1 in parallel to the conveyor's longitudinal axis 14 through the centre of the axis of socket joint 17a. Should another joint have to be used for angle movement alignment of support frame 13 to support structure 7, then ball joint 17 will prove to be an asset, due to the higher load-bearing capability, with regard to simplifying the installation and providing full functionality during the adjustment of the different positions of support frame 13 against support structure 7. 1 0 WO 2014/072331 PCT/EP2013/073142 Furthermore, connection and adjustment element 16 consists of a wedge box 22. Wedge box 22 holds five wedge packages 23 to 27, which enable support frame 13 to be adjusted against support structure 7 over three different levels. Wedge box 22 consists of, as shown in Fig. 12, a square baseplate 21 on which the first frame 29 sits. Baseplate 21 and frame 29 have the same outer contours. The first wedge package 27 sits in the surrounded area inside frame 29. Wedge package 27 consists of a related pair of wedges 27a and 27b, of which one is fixed in place and the alignment can be realised by moving the other longitudinally using adjustment screw 27c. The sloping planes of wedges 27a and 27b are positioned so that one slides along the other. The straight, outward-pointing surface of adjustable wedge 27b supports them and it slides along the other wedge 27a and they connect together to produce a functional component. Moveable wedge 27b of first wedge package 27 is guided up and down by frame 29 and its straight edge, which has its surface pointing outwards, sits on baseplate 21. The sloping plane guides moveable wedge 27b along the sloping plane of fixed wedge 27a. The straight, outward-pointing surface of wedge 27a lies up against the foot of socket joint 17a. When using adjustment screw 27c to adjust moveable wedge 27b, fixed wedge 27a is pressed up against the surface of the foot of socket joint 17a and socket joint 17a together with ball joint 17b move the support frame in the required direction. This is mentioned above as the first movement option that moves along the drive axis 15. If the movement occurs in the opposite direction then adjustment screw 27c must be removed from threaded hole 27d and screwed into the opposite threaded hole 27e. This will enable moveable wedge 27b to be moved in the other direction. The through connection with socket joint 17a through wedge box 22 to support structure 7 should be loosened whilst the adjustment movement is made in order to ensure that the adjustment movement between wedge box 22 and socket joint 17a can be fully realised. A second frame 30 with the same external dimensions is aligned alongside the first frame 29. It is connected on both sides, as shown in Fig. 11, with the -11 WO 2014/072331 PCT/EP2013/073142 support structure 7 construction and holds four other wedge packages 23, 24, 25 & 26 inside, which are aligned squarely to one another. The moveable wedges 23b, 24b, 25b & 26b are aligned inside frame 30 and their straight surfaces are pointed outwards. The non-moveable wedges 23a, 24a, 25a & 26a are fitted inside wedge packages 23, 24, 25 & 26. The moveable and non-moveable wedges are paired together with wedge 23a on 23b, 24a on 24b, 25a on 25b, 26a on 26b in wedge packages 23, 24, 25 & 26 and their sloping surfaces lie on one another and they slide along one another during the adjustment movement. The straight, inward-pointing surfaces of the non-moveable wedges 23a, 24a, 25a & 26a lie up against one of the four outer edges of the foot of socket joint 17a. If socket joint 17a has to be moved up or down or to the side then this can be realised using the relevant adjustment screws 23c, 24c, 25c or 26c. So that socket joint 17a can be moved in the respective direction, its connection to support structure 7 must be loosened first and the moveable wedge 23b, 24b, 25b or 26b can then be moved back and the appropriate moveable wedge 23b, 24b, 25b or 26b can be adjusted afterwards. The moving direction is realised by using the appropriate adjustment screw 23c, 24c, 25c or 26c or using the relevant threaded hole 23d or 23e, 24d or 24e, 25d or 25e, 26d or 26e. The screw connections for socket joint 17a and connection and adjustment element 16 with support structure 7 must be retightened afterwards. The previously described second option for moving support frame 13 in the direction of the conveyor's longitudinal axis 14 can also be realised in this way as well as the third option for moving support frame 13 in the vertical direction towards drive axis 15. Four torque supports 28 must be fitted on the free end as shown in Fig. 3 so that support frame 13 can be supported. Two vertical torque supports 281 and two bevelled torque supports 282 are provided for this purpose. All of the torque supports 28 are designed for longitudinal adjustment. Torque supports 28 also make it possible to use the longitudinal adjustment capability to adjust the position of the support frame for electric motor 13 and fix it in place. -1 2 WO 2014/072331 PCT/EP2013/073142 The previously mentioned four options for adjusting the support frame against support structure 7 by swinging it up or down in parallel to the conveyor's longitudinal axis 14 can now be realised. If necessary, these four adjustment options can be overlapped by using specific variations. Sufficient freedom of movement must be available for the moveable parts so that support frame 13 can be adjusted. An important technical condition for such freedom of movement can be realised by using ball joint 17 as specified. Ball joints 17 can also ensure that differently set-up connection and adjustment elements 16 will function so that the position of support frame 13 can be set up at a slope against support structure 7 at more than one level. 13 WO 2014/072331 PCT/EP2013/073142 Reference sign list 1 Driving drum 2 Drum drive shaft 3 Bearing block 4 Bearing block 5 Bearing block holder 6 Bearing block holder 7 Support structure for driving drum 1 8 Electric motor 9 Fundament 92 Fundament for affixing the torque supports 10 Output shaft 11 Support bearing 12 Support bearing 13 Support frame for electric motor 8 14 Conveyor's longitudinal axis 15 Drive axis/common rotational axis for drum drive shaft and electric motor 16 Connection and adjustment elements 17 Joint, ball joint, jointed connection 17a Socket joint 17b Ball joint 18 Coupling 19 Threaded bolts 20 Nuts 21 Baseplate 22 Wedge box 23 Wedge package/wedge pair 23a Non-moveable wedge 23b Moveable wedge 23c Adjustment screw -1 4 WO 2014/072331 PCT/EP2013/073142 23d Threaded hole (with adjustment screw) 23e Threaded hole (without adjustment screw) 24 Wedge package 24a Non-moveable wedge 24b Moveable wedge 24c Adjustment screw 24d Threaded hole (with adjustment screw) 24e Threaded hole (without adjustment screw) 25 Wedge package 25a Non-moveable wedge 25b Moveable wedge 25c Adjustment screw 25d Threaded hole (with adjustment screw) 25e Threaded hole (without adjustment screw) 26 Wedge package 26a Non-moveable wedge 26b Moveable wedge 26c Adjustment screw 26d Threaded hole (with adjustment screw) 26e Threaded hole (without adjustment screw) 27 Wedge package 27a Non-moveable wedge 27b Moveable wedge 27c Adjustment screw 27d Threaded hole (with adjustment screw) 27e Threaded hole (without adjustment screw) 28 Torque supports 281 Vertical torque support 282 Bevelled torque support 29 First frame 30 Second frame 1 5