Patent Publication Number: US-2021163111-A1

Title: Electromotive drive device and a method for operating such an electromotive drive device

Description:
The invention relates to an electromotive drive device for a floatable device, preferably a float tube, with a drive by means of an electric motor, which is operable by means of a separate power supply module, an open-loop/closed-loop control and with a remote control, wherein the electric motor is disposed within a housing and is connected to a drive propeller outside the housing, which drive propeller, at least in areas, is surrounded by a protecting device, which is connected to the housing via connecting supports. Furthermore, the invention relates to a method for operating an electromotive drive device of the aforementioned species. 
     An electro-mechanical drive for a floatable device, which is employable in sport fishing, is known from the EP 3 257 741 A1. The drive includes a motor, the drive axis thereof being connected to a drive propeller. 
     The DE 84 01 738 U1 describes a drive apparatus with a propeller, which offers the option to make motor-less watercrafts drivable by means of the propeller emerging into the water. Upon reaching the desired location, the propeller is lifted again out of the water. 
     With the EP 2 824 027 A1 a boat drive unit is made public, which includes a self-contained liquid cooling system, the liquid thereof being contained in a closed interior space. The interior space is formed by means of a cylindrical exterior surface of a cylindrical motor housing section of the drive unit for exchanging thermal energy between an electric motor, which is disposed therein. The interior space of the self-contained liquid cooling system is partially delimited by a shell structure of the drive unit in such a manner that the liquid in the interior space is in direct contact with the shell structure. Thus, exchange of thermal energy with the water of the environment is possible. 
     An electro-mechanical drive for a floatable device, which is employable in sport fishing, is disclosed in the EP 3 257 741 A1. A narrow unilateral mount is connected to the casing, the free end of the mount ends at a mounting foot for the connection to a mount, which is disposed at the floatable device; and furthermore, at the casing, a protective device is starting for the drive propeller. 
     The object of the invention is to create an electromotive drive device for a floatable device, the configuration thereof being provided for an energy-saving application in view of optimizing the use of the available energy. 
     An electromotive drive device according to the features of claim  1  achieves the object of the invention. Furthermore, the features of claim  15  claim a method for operating an electromotive drive device with the indicated features. In this case, the dependent claims following respectively the main claims, represent a further configuration of the inventive idea. 
     Sport fishing and therefore recreational fishing is gaining increasing commercial significance. So as to reel in a successful catch, in addition to fishing equipment also other important prerequisites are required, for example in the form of inflatable boats. Such boats, also known as belly boats or float tubes, are advantageous in that sport fishing is not limited to the shores of bodies of water. In this case, a float tube is substantially smaller than a normal rubber boat and allows the angler to freely move on the surface of the water and simultaneously practice sportive fishing with both hands. The structure of the float tube is specifically tailored to the angler, as the angler sits in the float tube and his/her feet hang in the water. Forceful paddling moves with the legs will move the boat on the water surface and steer it in the desired direction for practicing sportive fishing. Said locomotion requires a lot of force and in particular strong currents in flowing waters cause issues. Employing uniquely said option of locomotion considerably limits the use of the floatable device. This is what the inventors understood without a doubt, and therefore they came up with employing electromotive drive devices. 
     Such an electromotive drive device in the shape of a drive is located completely underneath the water surface and is affixed to the underside of the float tube or to the underside of another floatable device. Said placement is essentially advantageous, in particular for sport fishing, as activating the drive propeller does not create any mentionable waves, respectively does not develop any noise, which could cause the fish stocks to leave said region. Another advantage of such an electromotive drive device is found in quickly and easily reaching more remote fishing grounds. 
     Having a float tube or the like equipped in such a manner with an electromotive drive device thus allows for employing navigational sounding for being able to find fishing stocks, as the fish&#39;s air bubbles deliver very well recognizable echos. For this reason echo sounding delivers the angler important information on the number of fish in a region, respectively also under his boat, float tube or the like. 
     When employing an electromotive drive device together with a floatable device, herein in particular a float tube, the energy consumption is of decisive importance for the most economical use of the available energy. Only an energy accumulator can deliver the energy for operating an electromotive drive device on the water. With the intention of economically using said available energy to the greatest possible advantage, there are two major topics to consider, on the one hand, the design of the electromotive drive device and, on the other hand, providing an energy management, so that the angler returns in any case to his/her start point. 
     This is why the shape design of the drive device is of particular importance. In this case, flow-optimized drop-shaped embodiments of the housing have proven particularly advantageous, for example in an elliptical, rounded shaping on all sides, in addition to a good trimming. The end of said shape formation represents the widest location of the housing, then subsequently the proper housing shape narrows. The ratio of the bow in the frontal area to the length crucially also determines the speed of the drive device. The shape of the bow draws the water, which is displaced by the drive device, at a higher speed under the drive than the surrounding water, what decisively contributes to a reduced water resistance. The corresponding embodiment of the housing, which consists of an upper part and a lower part, intends to prevent turbulent flow around the drive device, because, on the one hand, turbulent flow would result in higher energy input, and moreover could also contribute to chase off the fish stock. 
     An energy efficient quantifiable prevention of energy losses due to the exterior shape design of the drive device can decisively contribute to being able to reasonably employ the available energy stored in the energy accumulator. In particular, this means energy benefits for decreasing primary or final energy input. 
     A further very decisive contribution to reducing the energy input when operating the drive device is found in that a motor, which is embedded within the two housing parts and kept therein, and to which the drive propeller is attached, is cooled at best by the surrounding water. This is realized through lateral intake openings, into which the cooling water can flow. Within the entire housing, the cooling water flows are subdivided into sections so that in addition to an optimum cooling, the sectioned cooling water flows combine again to an overall flow in the following, which exits at connecting supports via outlet openings and thus can contribute to assisting the drive. 
     At one portion of the housing, the two-part housing of the drive device has a mount, which can be releasably mounted to the floatable device underneath the water line via a connection. 
     For example, as a protection, the drive propeller can be provided with a ring shaped protective device in order to keep any items in the water away from the drive propeller. In a preferred embodiment, it is possible for the protective device to extend not completely circularly or ring-shaped around the drive propeller, but only partially. This is advantageous in that the flow resistances altogether can be reduced. Such an embodiment of partially mounting a protective device is then realized at the lower part so that protruding materials present in the navigational water cannot get into the area of the drive propeller. 
     Likewise, riding the float tube or the like combined with the drive device can be disturbed in that growth of plants, which in particular happens extensively during some seasons in bodies of water, could block the drive propeller. Such a blocking is very problematic, because the drive device is located underneath the floatable device. In such case, the angler can only return to the start point or steer to other shore regions, what s/he can only accomplish by working the leg muscles, in order to subsequently free the drive propeller from the plants. The above scenario cannot happen with the embodied structure of a particularly designed transition between the housing of the drive device and the connection of the drive propeller, because the structure is made such that vegetable matter cannot enter into said area any more. For this purpose, in a preferred embodiment, an overlapping conformation is provided at the housing with the upper housing part and the lower housing part thereof, which conformation at the end of the drive propeller is provided with a protruding area, which essentially is oriented to the side of the housing. Such a structure of so to say overlapping stationary housing parts and the rotating drive propeller protects the critical area against penetrating vegetable matter. One possible embodiment can be designed such that the end of a reception of the drive propeller includes a conical or straight course or the housing parts have a straight or conical course. 
     In a further preferred embodiment, it is also possible to employ seals in said area. Thus, a seal can be inserted between the stationary conformation of the housing and the end of the drive propeller. In such an embodiment, it is possible for the seal to be attached in the stationary conformation of the housing on the one side or else to be located on the exterior diameter of the end of the drive propeller. 
     An energy accumulator, for example in the shape of a lithium-ion accumulator, operates the electromotive drive device. Such an energy accumulator is located above the waterline on the float tube and is exchangeably connected to the drive device, which is located below the waterline, by means of a cable connector. The power supply from the energy accumulator to the drive device is controlled by a wireless and watertight manipulation element in the shape of a remote control. The remote control contains a sender/receiver device. The watertight power supply module likewise includes a transceiver device for communicating with the remote control. So that the owners/operators of several drive devices do not interfere with each other, the remote control can realize a change of the active transmitting channels. Such a remote control can be affixed to the body of the angler or optionally directly to the floatable device of the float tube. In addition to elements for activating the drive motor, the remote control can also include displays, which display the current charge state of the energy accumulator, for example. In addition to the current charge state of the energy accumulator, the display elements can also reveal other information to the user. This can be done with numerals, e.g. for the current motor performance in percentage, or else can be done with coloured displays. In particular, coloured displays are better seen on the water than numerals. Thus essentially, a color green can signal unrestricted operation, whereas a change from orange to the red area can display a certain risk area, respectively only a restricted functioning of the drive device. In this case, the functioning is determined at any point in time by the available power of the energy accumulator. At all times the maxim to be observed for the user of the drive device should be the return to a shore or to a coast. Furthermore, the remote control can be provided with a memory function, which stores a value of driven speed of the float tube, so as to continue driving at the same speed later. Likewise, the current rotational speed of the electric motor and also the power consumption of the drive device can be displayed. 
     The remote control can be equipped with an emergency shut-off switch, for example in order to switch-off the electric motor after the drive propeller is blocked, which can be displayed. 
     An open-loop/closed-loop control unit disposed within the receptacle includes an information processing unit, which performs permanent monitoring of the rationally available energy capacity. In addition to the travelled distance, such monitoring also includes the accumulated operating time of the drive device. Thereby, the motor runs automatically at the rotational speed according to the maxims of safe return to the shore. Thus, for example based on lower energy, also the open-loop/closed loop control unit can adapt the drive propeller to a reduced rotational speed, and thus adapt the speed. 
     In case of an undesired incident when employing the drive device, for example should the user not be able to operate the drive device any more, for example when s/he fell out of the float tube, an automatic forced outage of the entire drive device is triggered by a safety connection. Likewise, an emergency shut-off button is provided at the receptacle, so that the drive device can be shut-off at any time in case of failure or loss of the remote control or a hazard situation. 
     In a preferred embodiment, an electronic pulse-width modulation closed-loop control operates the open-loop/closed-loop control unit. 
     Employing the above-described electromotive drive device makes the use of the float tube or the like for the concerned angler a lot safer. The applicability is optimized as well, likewise the influence of atmospheric conditions can be addressed. 
     In a preferred embodiment, it is also possible that the person floating in the float tube on a body of water is able to modify the control of the drive by means of the remote control in that in addition to forward motion also backward motion can be performed. Also, when the float tube moves backwards, the speed is gradually adaptable to the requirements of the journey. Such bi-directional option, with the possibility of unrestrictedly travelling with the float tube in two travel directions with the help of the electro-mechanical drive device, is a particularity, because a float tube without drive device is only movable in forward direction. Thus, different fishing techniques can be practised without any problem, which do not only comprise the usual fishing operation. The drive device can be effectively employed as well as a brake in a targeted manner in both directions for dealing with too strong wind or too strong a current, which would cause drifting of the float tube away from the fishing spot. Also in case the fishing hook gets stuck in the subsoil or in case the person using the float tube in a side arm of the body of water, without the option of backward motion, would only be able to realize the change of the travel direction at great time expense, are situations in which controlling the drive device in both travel directions are of utmost importance. Obviously, also landing and departing is considerably easier with targeted changes of travel directions. Practising fishing, which otherwise is only reserved to large boats or vessels, namely pelagic fishing, can be performed with the combination of float tube and the inventive drive device. 
    
    
     
       In the following, the invention will be illustrated in more detail based on different exemplary embodiments in the drawings. 
         FIG. 1 : A perspective illustration of a first preferred embodiment of an electromotive drive device; 
         FIG. 2 : the same as  FIG. 1 , however, in a rear-sided view; 
         FIG. 3 : the same as  FIG. 1 , however, in a lateral view; 
         FIG. 4 : a drive device according to  FIG. 1  in a sectional illustration; 
         FIG. 5 : a further preferred embodiment of an electromotive drive device in the perspective illustration; 
         FIG. 6 : a front view of an upper housing part; 
         FIG. 7 : a top view of a lower housing part; 
         FIG. 8 : a partial illustration of the drive device according to  FIG. 5 ; 
         FIG. 9 : a section of the drive device according to  FIG. 8 , 
         FIG. 10 : a detailed view according to  FIG. 9 ; 
         FIG. 11 : a cutout illustration with mounting possibilities of a drive propeller; 
         FIG. 12 : a perspective illustration of the lower housing part; 
         FIG. 13 : a perspective illustration of the upper housing part; 
         FIG. 14 : a lateral view of the upper housing part; 
         FIG. 15 : a lateral view of the lower housing part; 
         FIG. 16 : the drive device in an underside view; 
         FIG. 17 : a potential configuration of a mount; 
         FIG. 18 : an application of a drive device underneath a float tube; 
         FIG. 19 : an attachment of a drive device to a float tube; 
         FIG. 20 : a receptacle for operating the drive device; 
         FIG. 21 : a block diagram of an open-loop/closed-loop control unit. 
     
    
    
       FIG. 1  reveals a first preferred embodiment of a drive device with a drive  26 . Starting at a mounting foot  2 , a protruding mount  10  is provided, which is adjoined by a housing formation  3 . In this case, the housing  3  consists of a lower housing part  33  and an upper housing part  12 . A connecting piece  9 , which transitions into a further connecting piece  8 , which serves for stabilizing a protective device  5 , is illustrated above at the upper housing part  12 . In the same manner, in the lower area of the mount  8  as well, the connecting piece  9  with the connecting piece  8  is disposed at the protective device  5 . In said embodiment, the protective device  5  is illustrated as a circular component, wherein the protective device  5  surrounds a drive propeller  7 . The housing  3  is provided with intake openings  27  for cooling water to enter. A bow  28  is illustrated at the front side of the housing formation. Electric energy is supplied to the drive  26  via a power supply connector  4 . Then, the mounting foot  2  includes a securing breakthrough  14 , in order to be able to exchangeably mount the drive  26  to a floatable device, for example in the shape of a float tube or the like. This provision allows for using the drive  26  for various floatable devices, likewise transport is made easier. 
     In  FIG. 2  represents the drive  26  in a perspective illustration from the rear. In this case, it becomes obvious that the mounting foot  2  can be embodied on the underside with a straight connecting surface  23  for attaching to a mount  61 , which is revealed in  FIG. 17 . In this case, the mounting foot  2  is pushed into a laterally open reception  62  and is reliably secured in a simple manner via a depression  63  in conjunction with the securing breakthrough and a securing element. 
     The mount  10  has curved side lines  11 , which in the flow-optimized embodiment thereof taper towards the drive propeller  7 . 
     Said above-described embodiments according to the  FIGS. 1 and 2  are again revealed in a lateral view of  FIG. 3 . 
       FIG. 4  represents a sectional illustration according to  FIG. 3  through the entire drive  26 . In said exemplary embodiment, an electric motor  17  with a gear, which is not identified in detail, is placed within the upper housing part  12  and the lower housing part  33 . A rotation protection  15  is disposed at the gear, so that the installed electric motor  17  remains in the position thereof. A drive shaft  31 , at which a drive connector  29  is placed, is located at the exit of the gear, which is not identified in detail. The non-illustrated blades of the drive propeller  7  are formed at the drive connector  29 . The rotation protection  15  for the combination of electric motor  17  and gear engages within a connecting support  6 . Within the mount  10  in continuation of the power supply connector  4  into a channel  13 , an electrical connector is installed, which at the end side, includes a plug-in device  16  for the connection to the electric motor  17 . 
       FIG. 5  reveals a further preferred embodiment of a drive  1  in a perspective illustration. Starting at the mounting foot  2  with the straight connecting surface  23  thereof, herein again, the mount  10  is formed. The power supply connector  4 , which is connected to a cable connector  18 , transitions into the mount  10 . At a front side  21  of the mount  10 , a rounding is formed, which ends in a rear side  22 . The housing  3  with the upper housing part  12  and the lower housing part  33 , to which the mount  10  is conformed, are retained in the position thereof by connections  35 . The intake openings  27  for the entering cooling water for the electric motor  17  are illustrated laterally both in the upper housing part  12  and in the lower housing part  33 . In this case, the intake openings  27  are illustrated as flow-optimized and following a rounding  52 . The connecting supports  25 , which on the underside lead into a rounded protective device  24 , are conformed on both sides of the upper housing part  12 . Oriented towards the drive propeller  7 , the connecting supports  25  are provided with outlet openings  30  for the exiting cooling water. 
     According to the view of drawing  6 , the upper housing part  12  is illustrated in a frontal view. Said illustration particularly clearly reveals that the outlet openings  30 , provided in the connecting supports  25 , are connected in a flow-optimized manner to an interior space  55  of the housing  3 . Stabilizing sections  32 , which lend the embodiment of the drive  1  a steady placement in the water, are conformed at the lower end of the connecting supports  25 , laterally to the protective device  5 . 
     In an individual illustration according to  FIG. 7 , the lower housing part  33  is illustrated in a view onto the connecting surface  23 . Said illustration particularly clearly reveals that the bow  28  has an essentially elliptical bulge-like shape, which is configured all-around and which in the terminal area thereof has an essentially round diameter  57  towards the housing  3 . The diameter  57  in the absolute dimensions thereof is greater than for example a protrusion  36 , which is located in the area of the connection for the drive propeller  7 . The intake openings  27  for the cooling water for the electric motor  17  are illustrated in an exterior wall  56  laterally in the lower housing part  33 . As can be seen in the illustrations of the intake openings  27 , starting at the exterior wall  56 , a rounding  52  is illustrated, which ensures that the cooling water entering into the intake openings  27  does not create an turbulences and so that thereby no energy losses occur. Furthermore, bores  49  are provided in the lower housing part  33 , which serve for stabilizing the housing parts  12  and  33  once they are assembled. Moreover, with the intention to allow for separating the upper housing part and the lower housing part, for example the lower housing part  33  is provided with lateral projections  59 . 
       FIG. 8  represents once more an overall view of the housing  3  of the drive  1 . In this case, the upper housing part  12  is exchangeably connected to the lower housing part  33 , on the one hand via the connections  35  and, on the other hand, in the area of the bow  28  via mounts  34 .  FIG. 8  likewise reveals that the drive propeller  7  with the reception  43  thereof is located closely at, respectively in the housing  3 . The entire housing  3  is illustrated once more in a sectional illustration according to  FIG. 9 . The electric motor  17  is embedded in a clamping manner within the upper housing part  12  and the lower housing part  33  without any additional attachments. The connection to the electric motor  17  is ensured via the cable connector  18 . 
     With the intention to clarify the housing structure, which prevents blocking the drive propeller  7  the housing  3  by means of vegetable matter, it is referred to the detail A of  FIG. 10 . The reception  43  of the drive propeller  7  enters between the projection  36 , which is located in the lower housing part  33  and the upper housing part  12 . Especially, said configuration of the projection  36  in conjunction with the reception  43  creates only a very narrow gap  38  between the stationary projection  36  and the reception  43  rotating on account of the drive shaft  31 . As one end  44  of the reception  43  is located behind the end of the projection  36 , the quasi conical formation of the gap  38  becomes so small that vegetable matter or the like in said area cannot cause any arrest of the drive propeller  7 . 
     A pin  40 , which engages into a recess  48  of the reception  43 , passes through the drive shaft  31 . On account of said embodiment, the reception  43  with the drive propeller  7  is torque-proof attached on the drive shaft  31 . A thread  41  is located at the end of the drive shaft  31 , onto which thread a nut  42  is screwed for securing the reception  43 . For example, the electric motor  17  is secured with screw connections  39  to a gear, which is not designated in detail.  FIG. 11  reveals once more that simple mounting of the drive propeller  7  is possible. 
     While the preceding drawings essentially described the exterior area of the housing,  FIGS. 12 and 13  refer to the area, in which the electric motor  17  is reliably retained between the upper part  12  and the lower housing part  33  solely by the connecting forces via the mount  34  and the bores  49  with the connections  35 . For positioning the electric motor  17 , webs  46  in the housing  3 , and thus both in the lower housing part  33  and in the upper housing part  12 , retain the essentially round housing. The webs  46  have another task, and namely channeling the cooling water flowing in through the intake openings  27  by means of the sections  58 , which are located between neighboring webs  46 . On account of the sections  58 , the cooling water is directly guided into the exterior areas of the electric motor  17 . After entering via the intake openings  27 , the cooling water is guided further in such a manner that it cannot remain laterally within the housing  3 , because in conjunction with the sections  58 , the present cooling water is directly guided to the outside of the housing  3  via the outlet openings  30  next to the drive propeller  7 . 
     With the intention to prevent turbulences of the entering cooling water, projections  51  with a rounding  52  are provided in the area of the intake openings  27 . The projection  51  is conformed to the webs  46 . With said formation, the entering cooling water is guided into the housing  3  in such a manner that the electric motor  17  experiences a very efficient cooling. An open free space  50  is provided in the rear area of the lower housing part  33 . Furthermore, discharge bores  54  are located in the interior space of the housing  3  for the available cooling water to drain. 
       FIG. 14  illustrates the upper housing part  12  in a lateral view, wherein said illustration particularly represents the course of a separating line  60  between the upper housing part  12  and the lower housing part  33 , which is shown in  FIG. 15 . The course of the separating line  60  is not straight, but has a curved course, which at the upper housing part  12  has its lowest point in the area of the bow  28 . Said measure also prevents turbulences of the flowing surrounding water laterally at the housing  3 , when riding the float tube  64 . When following the course of the separating line  60  in the interior area, i.e. towards the interior space  55 , a surrounding projection  19  is provided, in the area of the separating line  60  at the lower housing part  33 , a corresponding recess is provided, respectively pins  20  or pins, which ensure a precise positioning between the lower housing part  33  and the upper housing part  12 . However, when operating the drive device, even the slightest turbulence draws additional energy from the power supply module  67 . 
       FIG. 16  reveals the flow-efficient embodiment of the exterior shape of the housing  3  with the bow  28  and the point of the dimension expansion at the diameter  57  of the housing  3  in the longitudinal extension thereof. Said shape design, when riding the float tube, ensures that waves or wave movements will not have any lateral contact with the housing  3  or only very little contact. Thereby, ensuring efficient energy use. 
       FIG. 18  shows an exemplary application of the drive  1  at a carrier surface  66  of a float tube  64 . In this case, the carrier surface  66  is located between lateral bulges  65 . In this case, the mount  61  with the reception  62  thereof is placed on the carrier surface  66  such that subsequently the drive  1  is pushed into the reception  62  and then can be secured at that location.  FIG. 19  shows said placement within the mount  61 . Once the mounting foot  2  is inserted into the reception  62 , subsequently a non-illustrated securing element is inserted via the securing breakthrough  14 , such that the drive  1  is firmly seated. 
     The cable connector  18  supplies the drive with electric energy from the power supply module  67 , which can be seen in  FIG. 20  in a preferred embodiment. The power supply module  67  is located in a receptacle  83  for this purpose, which is transportable and is closable in a watertight manner. When using the power supply module  67 , a drive connector  73  by means of the cable connector  18  can supply the drive  1 ,  26  with electric energy. An energy accumulator  68  is provided for this purpose within the receptacle  83  and can be optionally guided to the drive connector  73  or else to a charge connector  71  via an electrical connector  69 . The charge connector  71  allows for recharging the energy accumulator  68 . 
     Moreover, a remote control  70  in the standby position thereof is inserted into the receptacle  83  by means of a plug-in connection. Said plug-in connection is simultaneously designed as a power supply  79  for the remote control in the standby position thereof. When in use, i.e. when employing the power supply module  67 , the remote control  70  is removed from the holder thereof, and, based on the sender and receiver device  80  contained therein, it can communicate with a non-illustrated sender and receiver device within the receptacle  83 . In this case, it is possible for the remote control  70  in particular to gradually adapt the speed, as well as the direction of movement of the drive  1 ,  26  can be changed. A change of direction, i.e. a sternway is given when currents have made the float tube  64  drift into an area, from which it has difficulties to manoeuvre its way out. Furthermore, the remote control  70  allows for reading the charge state of the energy accumulator  68 . Simultaneously, the charge state is an indicator or characteristic for having travelled a certain distance and/or a certain period of time. Said parameters are permanently calculated via an open-loop/closed-loop control unit  77 . Said permanent calculation ensures that the available energy of the energy accumulator is always measured in such a manner that the angler can safely return to a shore or a coast with the energy still available in the energy accumulator  68 . 
     The open-loop/closed-loop control unit  77  is illustrated in a block diagram  74  according to  FIG. 21 . A power supply  76  supplies electric energy to the open-loop/closed-loop control unit  77  via an energy supply connector  75 . The same supply is established to a processor  78  and to the power supply connector  79  for the remote control  70 . The processor  78  mutually communicates with the open-loop/closed-loop control unit  77  and, based on the parameters, which the provided data processing unit receives from outside, calculates the behavior of the open-loop/closed-loop control unit  77  such as to correspondingly energize the electric motor  17  via a motor connector  81 . The processor  78  likewise communicates with a sender and receiver unit  80 , which also has a connection  82  to the remote control  70  within the receptacle  83 . 
     As shown in the exemplary embodiment of a preferred embodiment of both the drive  1  and the open-loop/closed-loop control unit  77  in conjunction with the power supply module  67 , energy-saving use in terms of optimizing the available energy is possible with the particularly designed housing  3  in conjunction with an efficient cooling. 
     REFERENCES 
     
         
         
           
               1  drive 
               2  mounting foot 
               3  housing 
               4  power supply connector 
               5  protective device 
               6  connecting support 
               7  drive propeller 
               8  connecting piece 
               9  connecting piece 
               10  mount 
               11  side line 
               12  upper housing part 
               13  channel 
               14  securing breakthrough 
               15  rotation protection 
               16  plug-in device 
               17  electric motor 
               18  cable connector 
               19  projection 
               20  pins 
               21  frontal side 
               22  rear side 
               23  connecting surface 
               24  protective device 
               25  connecting supports 
               26  drive 
               27  intake opening 
               28  bow 
               29  drive connector 
               30  outlet opening 
               31  drive shaft 
               32  stabilizing section 
               33  lower housing part 
               34  mount 
               35  connection 
               36  projection 
               37  recess 
               38  gap 
               39  screw connection 
               40  pin 
               41  thread 
               42  nut 
               43  reception 
               44  end 
               46  web 
               47  free-cut 
               48  recess 
               49  bore 
               50  free space 
               51  projection 
               52  rounding 
               53  break-through 
               54  discharge bore 
               55  interior space 
               56  outside wall 
               57  diameter 
               58  section 
               59  projection 
               60  separating line 
               61  mount 
               62  reception 
               63  depression 
               64  float tube 
               65  bulge 
               66  carrier surface 
               67  power supply module 
               68  energy accumulator 
               69  connector 
               70  remote control 
               71  charge connector 
               72  emergency-off button 
               73  drive connector 
               74  block diagram 
               75  energy supply connector 
               76  power supply 
               77  open-loop/closed-loop control unit 
               78  processor 
               79  power supply 
               80  sender/receiver unit 
               81  motor connector 
               82  connection 
               83  receptacle