Abstract:
The invention relates to a device ( 10 ) for fixing an electromotor ( 18 ), in particular a fan motor. Said device comprises an essentially pot-shaped receiving housing ( 12 ), acting as a motor housing ( 32 ) with a receiving opening ( 14 ), into which the electromotor ( 18 ) at least partially projects and a retaining flange ( 34 ) mounted on the receiving housing ( 12 ) for fixing the motor housing ( 32 ) to a support element ( 36 ), for example a motor vehicle heating and/or air conditioning system, in addition to elements for radially and axially fixing the electromotor ( 18 ) in the motor housing ( 32 ). According to the invention, the receiving housing ( 12 ) has at least one elastic retaining element ( 50, 52, 90 ) for axial fixation. Said element is at least partially coated with an elastic material ( 66 ) on the side that faces the motor ( 18 ), is connected to the receiving housing ( 12 ) by its first axial end ( 54 ) and lies directly against the motor ( 18 ) in the vicinity of its second axial end ( 58 ).

Description:
[0001]    The invention is based on a device for mounting an electric motor, in particular a fan motor, according to the preamble of the independent claim.  
           [0002]    Fan motors for heater and air-conditioner fan systems that are used in motor vehicles, for example, are usually decoupled from the vehicle in terms of vibration engineering in order to reduce a transfer of structure-borne noise from the motor and/or the fan unit to the vehicle body and, therefore, into the passenger compartment of the vehicle.  
           [0003]    Main sources of undesired vibrations, e.g., in DC motors, are imbalances in the motor and the commutation inside the motor. Commutation occurs when the copper windings of the armature conduct current while the motor is operating. During each rotation of the armature shaft, current flows through the windings in the motor once in each direction. The current flow in the windings, influenced by a permanent magnet field, produces a reaction that is transferred as a torque pulse.  
           [0004]    Common methods for mounting motors of this type in fan housings involve mounting the motor first in an adapter part, e.g., by plugging it in, and then mounting said adapter part in a motor holder. A flange is typically located on the motor holder itself to securely join the motor with the air conditioner, e.g., via a carrier part formed on the vehicle body.  
           [0005]    To mount the actual motor in the adapter part or a motor housing, it is known to use snap-in hooks, to screw the components together, and to clamp the motor between two housing halves. It is furthermore known that electric motors can be pressed, with their pole rings, directly into a motor holder.  
           [0006]    Elastic damping elements can be inserted between the adapter part accommodating the motor and the motor holder itself, which said elastic damping elements are intended to ensure that the motor holder is decoupled from the motor vibrations.  
           [0007]    Normally, rubber is inserted in the form of appropriately formed rubber elements between the motor and the motor housing, in the flange or between the flange and a carrier element of the air conditioner, in order to dampen oscillations forming in the air conditioner or the vehicle body, and to suppress noises that are bothersome to the driver or his passenger in the passenger compartment of the vehicle.  
           [0008]    In practical use, there are numerous possibilities for inserting the rubber and/or decoupling elements composed of rubber between the housing flange and the air conditioner and/or between the motor and the motor housing, in order to dampen the vibration pulses.  
           [0009]    For example, DE 43 34 124 A1 discloses a device for housing an electric motor that attains a particularly low-vibration and, therefore, noise-damping effect by the fact that at least one elastic damping element is located between the inner walls of this housing device and the outer walls of the motor housing facing them, which said damping element bears against the walls of the housing device and the motor housing that face each other.  
           [0010]    These elastic damping elements, which are rubber elements formed appropriately in a preferred exemplary embodiment of the device disclosed in DE 43 34 124 A1, require higher assembly and material expense, which unnecessarily increases the costs of such a device.  
           [0011]    A holder for an electric motor is described in DE 36 18 177 A1, in the case of which the motor is inserted in a motor holder and secured against axial displacement by means of inwardly projecting, resilient noses.  
           [0012]    A silenced holding device for an electric motor is made known in DE 196 52 328 C2, in the case of which the electric motor is placed in a first plug-in receptacle, which functions as an adapter part, and is secured axially by means of snap-in hooks. This plug-in receptacle comprises radially displaceable tongues in the fashion of flat springs distributed around its outer circumference. Pegs that project radially outwardly are integrally molded on these tongues, onto which correspondingly-shaped, silencing intermediate parts can be attached, such as rubber caps with a clamped connection.  
           [0013]    The adapter part is inserted into a larger motor holding part during assembly of the holder disclosed in DE 196 52 328 C2. If the electric motor is now inserted, with its housing, into the adapter part, the tongue-like flat springs are pressed outwardly, so that they-helped along by the silencing intermediate parts-latch into corresponding immobilization openings of the motor holding part.  
           [0014]    The method for holding the motor as disclosed by the teaching of DE 196 52 328 C2 is extremely costly and component-intensive, which results in higher assembly expense and, therefore, cost and time expense.  
         ADVANTAGES OF THE INVENTION  
         [0015]    In contrast, the device according to the invention for mounting an electric motor having the features of the independent claim has the advantage that a simple assembly of the motor is realized using fastening hooks without adapters, with simultaneous decoupling attained by means of rubber damping elements.  
           [0016]    This results in a motor-motor housing combination that ensures that the electric motor will be held securely and in vibration-damped fashion with minimal expense for parts and assembly.  
           [0017]    In advantageous fashion, a plurality of resilient-elastic holding elements of a receptacle housing, which functions as motor housing, grip the electric motor directly, so that the need to use adapter or intermediate housings is eliminated. The resilient-elastic holding elements of the device according to the invention are advantageously provided with an elastic material on the side facing the motor, at least in parts, so that additional vibration and noise damping results due to the elastic properties of this material.  
           [0018]    Advantageous exemplary embodiments of the device according to the invention result from the features listed in the dependent claims.  
           [0019]    In an advantageous exemplary embodiment of the device according to the invention, the elastic material—with which the resilient-elastic holding elements are provided on their side facing the motor—is a thermoplastic elastomer. It can be applied in simple and, therefore, advantageous fashion, directly to the resilient-elastic holding element, e.g., by means of a two-component spray process.  
           [0020]    A device according to the invention that is easy to produce and has a particularly light installation weight results when the motor housing, i.e., the receptacle housing for the motor, as well as the resilient-elastic holding elements are made of a plastic, e.g., a polypropylene plastic.  
           [0021]    This exemplary embodiment makes it possible to markedly reduce the weight of the device according to the invention for mounting the electric motor. In particular, the housing parts can be manufactured in an injection-molding process, so that it is also possible, in simple fashion, to form additional components and carrier elements for motor components on the housing.  
           [0022]    The resilient holding elements for the motor can be developed directly on the pot-shaped receptacle housing in the shape of a tongue, preferably as a single component in one working step. In this case, the holding element can transition, on its lower end, directly into the wall of the receptacle housing, and it remains movable at its second axial end relative to the housing wall, so that a corresponding bending stress results on this tongue-like spring element, via which the motor can be immobilized in the housing device.  
           [0023]    A secure mounting of the motor in the motor housing results in particular when the resilient-elastic holding elements comprise a hook-shaped fastening element on their exposed ends, e.g., in the form of detent noses that grip into or onto corresponding recesses and seating edges of the electric motor. In this fashion, the electric motor can be secured against sliding in the axial direction in a simple yet reliable manner.  
           [0024]    In an exemplary embodiment of the device according to the invention, the holding elements grip, with their hook-shaped, exposed ends, on an end face of the electric motor. With this type of fastening, it is feasible that the electric motor can be placed in the motor housing in both possible orientations, which would expand the appliation width of the motor holder. For instance, the hook-shaped ends of the resilient holding elements can grasp around the end of the pole ring, for example, and thereby secure the motor axially.  
           [0025]    The motor is therefore mounted directly in the motor housing with minimal expenditure for parts and assembly with the aid of fastening hooks, using elastic damping elements.  
           [0026]    The same advantages also apply for a particularly advantageous exemplary embodiment of the device according to the invention for mounting a motor, in the case of which the hook ends of the resilient-elastic holding elements grip directly into the motor. The depth of the installed motor-motor housing combination can be reduced markedly when the snap-in hooks engage at a point not near the end face of the motor, e.g., directly in openings on the circumference of the pole ring. This makes it possible to attain an arrangement of a bladed fan wheel, for example, that is advantageous and close to the motor, since the geometry of the hook and holding element cannot collide with the bladed fan wheel.  
           [0027]    If the detent elements are provided with a tangential coating in the region where they grip into the motor, nearly any coupling of noise and vibration into the hook ends and, therefore, the motor housing, is prevented. This measure also secures the motor itself against turning in the receptacle housing.  
           [0028]    As an alternative, the electric motor can also be secured against radial rotation by means of stop pegs installed in the base region of the pot-shaped receptacle housing and projecting into the housing, which said stop pegs grip in corresponding openings of the electric motor. A particularly advantageous exemplary embodiment results when these stop pegs are also coated with an elastic material, such as a thermoplastic elastomer. The latter method simplifies the manufacture of the fastening hooks.  
           [0029]    To increase the dynamic stability of the motor in the motor housing, additional elastic supports for immobilizing the motor radially can be installed on the inner walls of the motor housing. For example, an elastic ring or a plurality of sprayed-on ridges composed of an elastomer can cover the inner circumference of the receptacle housing in the manner of a circle and support the electric motor against the housing wall.  
           [0030]    A good radial immobilization of the motor in the motor housing results when a plurality of—typically three or four—elastic decoupling elements attached axially to the inner wall of the receptacle housing are provided that minimize a transfer of noise and vibration from the motor to the housing. In advantageous fashion, these radial decoupling elements can also be sprayed directly onto the rigid wall of the motor housing.  
           [0031]    A particularly advantageous exemplary embodiment of the device according to the invention results when the radial decoupling elements extending axially in the receptacle housing are formed directly on the resilient-elastic holding elements. This functional combination of axial and radial decoupling is very practical in terms of production engineering, and it makes it possible to reliably decouple the motor housing from the motor with relatively simple means when the motor is mounted in the receptacle housing, and production expense is reduced. To realize these decoupling elements-which act axially as well as radially-the resilient-elastic holding elements and the regions of the inner wall of the receptacle housing that are axially aligned with them are coated with an elastic material that decouples the motor and the motor housing from each other, but which reliably secures the motor in the housing.  
           [0032]    If the center of gravity of the motor is located outside of the base of the resilient-elastic holding element, however, then it is preferable to install the radial decoupling elements separately in the rigid region of the receptacle housing, so that the detent noses are not placed under bending load and become misshapen by the weight of the motor or rotating forces, by way of which a fixed position of the motor in the housing and, therefore, in the body of the vehicle would no longer be ensured.  
           [0033]    A further advantageous exemplary embodiment of the device according to the invention is attained when a counter-bearing is provided in the motor housing, which said counter-bearing results in an additional axial and radial immobilization of the motor in the receptacle housing. This is attained, in particular, by the fact that the counter-bearing also comprises an elastic damping element or is designed directly as such.  
           [0034]    A particularly advantageous exemplary embodiment that is easy to realize results when the counter-bearing is sprayed directly into the receptacle housing. To this end, the counter-bearing can also be produced out of a thermoplastic elastomer that is sprayed into the housing in a two-component spray process. A counter-bearing is particularly advantageous that comprises a plurality of pegs extending in the shape of a star, which said pegs comprise a roller-shaped surface on their side facing the motor and can therefore capture any oscillating motions of the motor in the motor housing.  
           [0035]    As an alternative, the counter-bearing can also be pre-mounted on the motor itself, also with corresponding elastic elements.  
         DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     
    
    
       [0036]    Further advantages of the device according to the invention are indicated in the description and the drawings.  
         [0037]    Exemplary embodiments of the device according to the invention are shown in the drawings in simplified, schematic fashion. The drawings, the description, and the claims contain numerous features in combination. One skilled in the art will advantageously consider them individually as well and combine them into reasonable further combinations.  
         [0038]    [0038]FIG. 1 is a sectional drawing through a first exemplary embodiment of a device according to the invention with electric motor inserted,  
         [0039]    [0039]FIG. 2 is a detained view of the first exemplary embodiment of the device according to the invention,  
         [0040]    [0040]FIG. 3 is the detained view of the device according to the invention in FIG. 2 in a different representation,  
         [0041]    [0041]FIG. 4 is a sectional drawing of a second exemplary embodiment of the device according to the invention,  
         [0042]    [0042]FIG. 5 is a detained view of the second exemplary embodiment of the device according to the invention,  
         [0043]    [0043]FIG. 6 is the detained view of the device according to the invention in FIG. 5 in another representation,  
         [0044]    [0044]FIG. 7 is a sectional drawing of a further exemplary embodiment of the device according to the invention, and  
         [0045]    [0045]FIG. 8 is a top view of the exemplary embodiment of the device according to the invention according to FIG. 7, shown in detail. 
     
    
       [0046]    A first exemplary embodiment of the device  10  according to the invention is shown in FIG. 1. In this exemplary embodiment, the device  10  comprises a receptacle housing  12  with a receiving opening  14 , through which a motor  16 , in particular an electric motor  18 , can be inserted in the housing  12 . In the representation shown in FIG. 1, the electric motor  18  has already been completely inserted into the receptacle housing. In schematic fashion, shown in simplified form, the electric motor  18  [is equipped] with a pole ring  20 —which simultaneously forms a pole housing  19 —a motor shaft  22 , a first bearing  24 , and a second bearing  26  for holding the shaft  22 , and a brush holder  28  with associated commutator  30 .  
         [0047]    A motor flange  34  is located on the outside of the receptacle housing  12  functioning as motor housing  32 , which said motor flange is developed integral with the receptacle housing  12  in the exemplary embodiment in FIG. 1. Via this motor flange  34 , the electric motor  18  can be mounted on an appropriate carrier element  36  of a ventilation system or air conditioner and/or directly to the body of a motor vehicle. The motor flange  34  comprises openings  38  for mounting the motor housing  32  on the carrier element  36 . Furthermore, devices for electrically connecting the motor  18  with a current and voltage source (not shown in FIG. 1) to operate the electric motor  18  can be located on the motor flange  34  and/or on the outside of the receptacle housing  12 . As an option, holding devices can be formed on the motor housing  32  and/or on the motor flange  34  for mounting further components of the electric motor  18  as well as the fan.  
         [0048]    In the exemplary embodiment in FIG. 1, the receptacle housing  12  is composed of plastic and is developed in the shape of a pot comprising a cylindrical housing part  42  that substantially encloses the inserted electric motor  18 , and comprising a bottom part  46  that is opposite the receiving opening  14  and, in the exemplary embodiment, is closed except for a region for accommodating a counter-bearing  44 .  
         [0049]    A plurality of resilient-elastic holding elements  50  extending axially relative to the motor shaft  22  for immobilizing the electric motor  18  in the receptacle device  12  is installed in the region of the receiving opening  14  of the motor housing  32 . In the exemplary embodiment shown, the holding elements  50  are designed as resilient, radially displaceable tongues  52  of the cylindrical part  43  of the receptacle housing  12 , as shown in the detained views of this exemplary embodiment in FIGS. 2 and 3. To accomplish this, a first end  54  of these spring elements  50  is permanently interconnected with the motor housing  12  by developing it as an integral part of the circumference of the receptacle housing  12 . On its axial longitudinal sides  55 , the flat spring  55  is separated from the wall  57  of the receptacle housing  12  by means of slits  56 . With their second, exposed ends  58 , the flat springs  52  can be pressed in the radial direction into associated, pocket-like recesses  60  in the wall  57  of the motor housing  32  in order to expose the receiving opening  14  of the receptacle housing  12  so that the electric motor  18  can be guided into the receptacle housing  12 .  
         [0050]    [0050]FIG. 2 shows a section of the wall  57  of the receptacle housing  12  of the device  10  according to the invention. Two lateral indentations and/or slits  56  separate the holding element  50  from the wall  57  of the housing  12 , thereby forming the tongues  52 , which said tongues allow the holding element  50  to move in resilient fashion.  
         [0051]    [0051]FIG. 3 shows, in a top view, the position of the flat springs  52  relative to the recesses  60  in the wall  57  of the receptacle housing  12  of the device  10  according to the invention before the electric motor  18  has been inserted.  
         [0052]    If the electric motor  18  is inserted in the receptacle housing  12 , the resilient tongues  52  are pressed radially outwardly into the pocket-like recesses  60 , so that the electric motor  18  can be inserted past the holding elements  50  and in the housing  32 . The resilient-elastic holding elements  50  then act with a corresponding counter-force on the electric motor  18 , thereby immobilizing it in the motor housing  32 .  
         [0053]    On its second end  58  opposite the bottom part  46  of the receptacle housing  12 , the resilient-elastic holding elements  50  comprise additional, radially projecting, hook-shaped fastening elements  62 , as shown in the representation in FIG. 1 in particular. In the exemplary embodiment presented in FIG. 1, these fastening hooks  62  in the form of detent noses  98  grip around an end face  64  of the inserted electric motor  18  and thereby immobilize it in the axial direction in the receptacle housing  12 .  
         [0054]    For the vibration decoupling and a corresponding silencing of the motor  18 , the resilient-elastic holding elements  50  and the hook-shaped fastening elements  62  on the side facing the motor  18  are coated with an elastic material  66  in the form of an elastomer  68 . The exemplary embodiment in FIG. 1 is a thermoplastic elastomer  70  that is applied into the plastic housing directly in a two-component spray process.  
         [0055]    The elastomer coating of the flat springs  52  travels in the axial direction over the actual length of the spring and, therefore, beyond the first end  54  of the resilient tongues  52 , on the inner housing wall  48 , and down to the bottom region  46  of the receptacle housing  12 .  
         [0056]    Located in the bottom part  46  of the pot-shaped receptacle device  12  is a recess  74  in the form of a central opening  76  for a second bearing  26  of the shaft  22  of the electric motor  18 . In the exemplary embodiment of FIG. 1, this bearing  26  of the motor shaft  22  is secured via a bracket  78  against the pole housing  19  and, therefore, the electric motor  18  itself. An elastic damping element  80  for the shaft bearing  26  is formed in the central base opening  76  of the device  10  according to the invention that functions as counter-bearing  44  for securing the electric motor  18  axially by means of the snap-in hooks  62 . This damping counter-bearing  44 , which is composed of an elastomer  68 , is also sprayed directly into the housing  12 , and also provides radial damping and immobilization of the electric motor  18  in the motor housing  32 .  
         [0057]    A plurality of stop pegs  82  pointing in the direction toward the receiving opening  14  are also formed in the bottom region of the receptacle housing  12  according to the invention. These stop pegs  82 -which can also be coated with an elastic damping material  66 -grip into openings of the electric motor  18 , or they each clamp the sides of a bearing bracket  78 . In this fashion, the motor  18  can be secured against turning in the motor housing  32 .  
         [0058]    To provide additional radial decoupling and immobilization of the electric motor  18  in the motor housing  32 , elastic decoupling elements  86  extending in the axial direction and formed radially inwardly are located in the region of the first end  54  of the resilient-elastic holding elements  50 , which said elastic decoupling elements exert a corresponding pressure on the pole ring  20  of the electric motor  18  and therefore hold it in the motor housing securely but in vibration-damped fashion. By way of this measure, the dynamic stability of the motor  18  in the motor housing  32  is markedly improved.  
         [0059]    [0059]FIG. 4 shows a partial view of a second exemplary embodiment of the device according to the invention. Identical components of this exemplary embodiment are labelled with the same reference numerals as the first exemplary embodiment in FIG. 1.  
         [0060]    Again, the device  10  according to the invention is composed of a pot-shaped receptacle housing  12 , on which a motor flange  34  is formed as an integral component to mount a motor  16  on a carrier element  36  of a heater system and/or air conditioner of a vehicle. In the representation in FIG. 4, an electric motor  18  is inserted in the motor housing  32 . The individual, schematically shown components of the electric motor  18  correspond to those in the exemplary embodiment in FIG. 1. Additionally, a fan and/or blower bladed wheel  88  is mounted on a shaft  22  of the electric motor  18 .  
         [0061]    The exemplary embodiment of the device  10  according to the invention shown in FIG. 4 also comprises a plurality of resilient-elastic holding elements  50  distributed around the circumference of the receptacle housing, although only two of them are shown in FIG. 4. The resilient-elastic holding elements  50  are developed in this exemplary embodiment in the form of flexible springs with its first end  54  formed as a single component on the motor housing  32 —produced preferably out of plastic—and it is elastically flexible on its second, exposed end  58 , particularly in the radial direction, when a certain force is applied. Axial slits  56  in the direction of the wall  57  of the receptacle housing  12 —which separate the resilient-elastic holding elements  50  laterally from the receptacle housing—make the radial flexibility possible. The manner in which the spring elements  90  are formed out of the receptacle housing  12  is illustrated clearly in the detained representations in FIGS. 5 and 6.  
         [0062]    [0062]FIG. 5 shows a section of the wall  57  of the receptacle housing  12  with a flexible spring  90  formed out of it accordingly. FIG. 6 shows the same section in a top view, for clarification.  
         [0063]    The side of the resilient-elastic holding elements  50  facing the motor  18  is coated with an elastic damping means  66  which, in the special exemplary embodiment of FIG. 4, is a thermoplastic elastomer  70  that is sprayed on directly.  
         [0064]    On its exposed top end  68 , the elastic flexible spring  90  comprises fastening elements  62  pointing radially into the receptacle housing  12  in the form of detent noses  98  that are also coated with an elastic damping material  56  on its side facing the motor. These fastening elements  62  grip into the electric motor, thereby immobilizing it.  
         [0065]    In the exemplary embodiment shown in FIG. 4, the resilient-elastic holding elements  50  grip with their radial fastening elements  62  installed on their exposed end  58  directly into correspondingly-aligned openings  94  of the pole housing  19  and/or the pole ring  20  of the electric motor  18 .  
         [0066]    The fact that the fastening hooks  62  grip inwardly in a position that is not near an end face  64  of the motor  18  makes it possible to attain an arrangement of the bladed fan wheel  88  that is advantageous and close to the motor. Due to this measure, the depth of the entire fan arrangement is reduced in advantageous fashion, e.g., as compared with the exemplary embodiment shown in FIG. 1, since the hook geometry of the detent noses  98  does not collide with the geometry of the bladed fan wheel  88 .  
         [0067]    By means of a tangential—and possibly elastic as well—coating  87  of the fastening hooks  62  and/or  98  in the region where they grip into the motor  18 , any noise and vibration coupling into the hooks  62 ,  98  and/or the resilient-elastic holding elements  50  and, therefore, into the motor housing  32  are prevented, and the motor  18  is also secured against rotation.  
         [0068]    For the radial immobilization and vibration damping of the electric motor  18  in the device  10  according to the invention according to FIG. 4, a plurality of elastic decoupling elements  86  extending in the axial direction and formed on the inner wall  48  of the receptacle housing  12  is installed in the region of the first end  54  of the resilient-elastic holding elements  50 . In the exemplary embodiment, they are sprayed directly onto the holding elements  50  and the housing inner surface  48  aligned therewith. In principle, they can be interconnected with the housing  12  in another fashion as well, however.  
         [0069]    Located in the bottom region  46  of the device  10  according to the invention as shown in the exemplary embodiment in FIG. 4 is a further, elastic damping element  80  that is also sprayed onto the bottom  46  of the receptacle housing  12  as a thermoplastic elastomer  70  in a two-component spray process. This further damping element  80  functions as a counter-bearing  44  for the axial as well as radial immobilization of the electric motor  18  in the receptacle device  12 .  
         [0070]    [0070]FIG. 7 shows a further exemplary embodiment of the device  10  according to the invention having a pot-shaped motor housing  32  accommodating an electric motor  18 , on which said motor housing a motor flange  34  is installed for mounting the device  10  on a body of a motor vehicle. The motor housing  32  comprises a receiving opening  14 , a cylindrical housing part  42  accommodating the motor  18  in the installed state, and a housing base  46  in which a central opening  76  is provided for the shaft  22  of an electric motor  18  or for a damping element  80  supporting a bearing of the shaft  22 .  
         [0071]    Appropriate openings  38  are provided on the motor flange  34  for screwing the device  10  according to the invention to a carrier part  36  of the body or to the air conditioner of a motor vehicle. Also formed on the motor flange is a connection opening  72  for an electrical plug contact for operating the electric motor  18 .  
         [0072]    The essentially pot-shaped receptacle housing  12  comprises a plurality of resilient-elastic holding elements  50  distributed around its circumference, which said holding elements are designed in the shape of a tongue  52  and as a single component out of the receptacle housing  12 . To this end, there are axial indentations  56  on the sides of the resilient tongues  50 ,  52  in the receptacle housing  12  that make a radial displacement and/or bending of the resilient tongues  50 ,  52  possible.  
         [0073]    The exposed end  58  of the resilient tongues  50 ,  52  is equipped with fastening elements  62 ,  98  pointing radially inwardly toward the motor shaft  22  and extending off of the resilient tongues  50 ,  52  at a right angle that secure an electric motor  18  inserted in the receptacle housing  12  against displacement in the axial direction. The resilient tongues  50 ,  52  and the fastening elements  62 ,  98  can be coated on the inside with an elastic damping material  66 .  
         [0074]    A plurality of decoupling elements  86  that project radially into the receptacle housing  12  to a certain extent and that extend axially in this exemplary embodiment are located on the inner wall  48  of the receptacle housing  12  for the radial decoupling and immobilization of an electric motor  18  placed in the receptacle housing  12 . These elastic decoupling elements  86  for the radial movement of the motor  18  can have the shape of a roller or a ball, or they can be pointed.  
         [0075]    In the exemplary embodiment according to FIG. 7, the radial decoupling elements  86  are located at a distance from the resilient-elastic holding elements  50 —which ensure the axial immobilization and decoupling of the electric motor  18 —in the rigid region  100  of the receptacle housing  12 , so that the axial and the radial damping components are arranged separated from each other around the circumference of the motor housing  12  according to the invention. A separated installation of the radial decoupling elements  86  is preferred, in particular, when the center of gravity of the electric motor is located outside of the base of the resilient-elastic holding element. Otherwise, the holding elements  50  could be placed under excessive bending load and become misshapen by the weight of the motor or rotating forces, by way of which a fixed position of the motor would no longer be ensured.  
         [0076]    An elastic damping element  80 , as the counter-bearing  44 , is located in the bottom region  46  of the pot-shaped receptacle device  12 , which said damping element can be sprayed into the receptacle housing  12 , or it can be installed in the housing in other methods known to one skilled in the art. This counter-bearing  44  counteracts the radial and/or axial decoupling elements of the device  10  according to the invention and therefore immobilizes the electric motor  18  in the axial as well as radial direction.  
         [0077]    [0077]FIG. 8 shows the pot-shaped receptacle housing  12  of the device  10  according to the invention in a view looking into the housing  12 . In this exemplary embodiment, three resilient-elastic holding elements  50  are distributed around the circumference, which said holding elements can be pressed radially outwardly into pocket-like recesses  60  provided on the circumference of the housing by applying appropriate force. To this end, the holding elements  50  are interconnected on their first end  54  with the receptacle housing  12 , but they are separated from said receptacle housing on their sides by slits  56 . The holding elements  50  comprise radially inwardly projecting snap-in hooks  98  on their second axial end  58 , which corresponds to the visible top end in FIG. 8. Radial decoupling elements  86  composed of an elastic material  66  are also distributed around the circumference of the housing  12  at a distance from the resilient-elastic holding elements  50 . The radial decoupling elements  86  extend in the axial direction on the inner wall  48  of the receptacle housing  12  and have a convex surface directed toward the inner space of the receptacle housing  12  that can also be designed spherical or pointed in shape and which, when the motor is installed, can come to rest, e.g., against the pole housing  19  and/or the pole ring  20  of the electric motor  18  and, as a result, immobilize them radially in the motor housing  32 . To increase the elasticity of the radial decoupling components  86 , axial indentations  102  in the receptacle housing  12  can be formed in the wall  57  of the pot-shaped receptacle housing  12 , on the back side of the radial decoupling elements  86 , into which said indentations the elastic material  66  of the radial decoupling elements  86  can be pressed by the inserted motor, so that the elastic behavior of these damping components also increases.  
         [0078]    A counter-bearing  44  composed of an elastic material  66 , preferably a sprayed-on thermoplastic elastomer  70 , is formed in the bottom element  46  of the pot-shaped receptacle housing  12  of the device  10  according to the invention. In the exemplary embodiment shown, the elastic counter-bearing  44  comprises a central opening  104  for the shaft  22  of the electric motor  18 . Additionally, the counter-bearing  44  comprises—on its side facing the receiving opening  14  of the motor housing  12 —a plurality of radially outwardly extending pegs  106 , arranged in the shape of a star, in the form of roller bodies  108 , on which the electric motor  18  and/or the bearing bracket  78 —on which the associated bearing of the motor shaft  22  is mounted—can roll off in a fashion that is damping to a certain extent when tumbling motions take place.  
         [0079]    The counter-bearing  44  designed in this fashion makes it possible for motor vibrations that occur to be decoupled radially as well as axially.  
         [0080]    In this exemplary embodiment of the device according to the invention, two stop pegs  110  pointing in the direction of the receiving opening  14  are also located in the bottom region of the pot-shaped receptacle housing  12 , between which a bearing bracket  78  of the electric motor  18  can be clamped. In the exemplary embodiment shown, these stops  110  are also equipped with an elastic damping material  66  on their contact points toward the motor. Using these stops  110 , the motor  18  can be secured against rotation inside the motor housing  32 . The stop pegs  110  are easy to form as an integral component on the motor housing  32  or directly on the counter-bearing  44 .  
         [0081]    The device according to the invention is not limited to the exemplary embodiments presented in the description.  
         [0082]    For instance, the device according to the invention is not limited to a use with fan motors. Any other type of motor that must be installed in vibration-decoupled and, therefore, silenced fashion can be mounted in advantageous fashion using the mounting device according to the invention.  
         [0083]    In particular, the radial decoupling elements need not extend axially on the housing wall of the motor receptacle. Rather, two or more circular decoupling elements in the form of appropriate elastic ridges extending on the inside around the circumference of the housing wall are feasible as well.  
         [0084]    The elastic decoupling materials do not necessarily have to be sprayed on. Instead, they can also be applied using other processes known to one skilled in the art, such as bonding directly to the appropriate components of the motor housing.