Abstract:
The invention relates to a connecting support ( 20 ) for connecting electric functional elements ( 46 ) in an auxiliary drive ( 2 ) of a vehicle. The connecting support ( 20 ) comprises at least one electrically conductive metal strip ( 28 ) for establishing an electric contact. The connecting support ( 20 ) is designed in one piece or has an upper part ( 22 ) and a lower ( 24 ) part. Both parts an are detachably connected with each other. The electrically conductive metal strip ( 28 ) can be housed in a receptacle ( 26 ) of the upper and lower parts ( 22, 24 ). The connecting support ( 20 ) substantially encompasses the metal strip ( 28 ).

Description:
BACKGROUND AND SUMMARY OF THE INVENTION 
       [0001]    The invention relates to a connecting support for connecting electrical functional elements of an auxiliary drive of a vehicle, for example of a windshield wiper drive. 
         [0002]    It is known from the prior art for a brush holder and a connecting plug which are arranged on a motor component to be connected, for example, to a control contact pick-up on a transmission housing or a transmission cover via a cable or via electrically conductive metal strips. The metal strips are in this case inserted loosely and exposed in holders, or are extrusion coated with plastic in places. However, connection via a cable has the disadvantage that the cable can easily be torn off if it is guided loosely from the pole housing to the transmission housing. In turn, the electrically conductive metal strips have the disadvantage, because they are exposed, that they can easily be damaged or become dirty. 
         [0003]    The object of the invention is therefore to provide a connecting support in which electrically conductive metal strips can be laid easily and on the other hand are protected against dirt and damage. 
         [0004]    The connecting support in this case has the advantage that the fact that the metal strip is suitably surrounded protects it against dirt and damage. A further advantage is that the provision of an upper part and of a lower part which are detachably connected to one another, having a receptacle for the electrically conductive metal strip, means that it can be fitted easily and is easily accessible. A further advantage is that, for example if the metal strip is damaged, there is no need to replace the entire connecting support. 
         [0005]    In another advantageous embodiment, the connecting support is formed integrally, by extrusion coating the metal strip, for example by means of plastic. This has the advantage that the connecting support together with the metal strip can be produced particularly easily and at low cost, and the metal strip is in this case reliably protected against dirt and damage. If two or more metal strips are extrusion coated in this case, then they are in this case preferably arranged to be adequately separated from one another, so that no electrical contact can occur. 
         [0006]    In a further advantageous embodiment, the upper part and/or the lower part of the connecting support have/has two or more receptacles, depending on the purpose. The receptacles are in this case, for example, in the form of depressions or projections, with the projections in each case being arranged on both sides of the corresponding metal strip. This allows the metal strips to be guided securely without it being possible for them to slide, resulting in an electrical contact between them and thus in a short circuit. The depressions may in this case be designed such that the metal strips can be inserted horizontally or vertically into the depressions. A vertical arrangement of the metal strips has the advantage that a large number of them can be arranged alongside one another, and the connecting support can be designed to be relatively narrow. 
         [0007]    In a further preferred embodiment, the connecting support is detachably connected at its ends for example to a plug housing with a plug or to a control contact pick-up with a contact spring. This has the advantage that the connecting support can easily be fitted and, if required, can also easily be removed again. In one alternative embodiment, at least one end of the connecting support is firmly connected to a plug housing by means of a plug, or to a control contact pick-up with a contact spring. This likewise results in it being easy to fit the connecting support. Furthermore, the plug housing or the control contact pick-up cannot be inadvertently removed. The metal strip  28  may in this case, for example, be connected to the plug  38  or to the contact spring  34  by means of soldering or welding. 
         [0008]    In another preferred embodiment, the connecting support can be attached to an auxiliary drive by screwing, adhesive bonding, welding and/or clipping. This makes it possible to prevent the connecting support from being loosely attached to the auxiliary drive and, for example, from being able to be torn off inadvertently. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    The embodiments of the invention will be explained in more detail in the following text with reference to the schematic figures of the drawing, in which: 
           [0010]      FIG. 1  shows a schematic view of a detail of an auxiliary drive according to the prior art, 
           [0011]      FIG. 2  shows a schematic view of a detail of a further auxiliary drive according to the prior art, 
           [0012]      FIG. 3  shows a schematic view of a detail of a further auxiliary drive according to the prior art, 
           [0013]      FIG. 4  shows a schematic section view of a first embodiment of a connecting support according to the invention, 
           [0014]      FIG. 5  shows a schematic plan view of the lower part of a second embodiment of the connecting support according to the invention with an inserted electrically conductive metal strip, and 
           [0015]      FIG. 6  shows a schematic view of an auxiliary drive which is provided with a connecting support according to the invention. 
       
    
    
       [0016]    Identical or similar parts are annotated with the same reference symbols in the figures. 
       DETAILED DESCRIPTION 
       [0017]      FIG. 1  and  FIG. 2  each show a schematic view of a detail of an auxiliary drive  2  according to the prior art. In this case, a cable  4  is connected at one end to control contacts  6  which are arranged in a transmission housing  8 , and is connected at the other end to a connecting plug  10 . 
         [0018]    Furthermore,  FIG. 3  shows a schematic view of an auxiliary drive  2  according to the prior art. In this case, electrically conductive metal strips  12  which are injection-molded or extrusion-coated in the transmission cover are used. In this case, openings  14  are provided which form support points which are necessary during injection molding or extrusion coating of the metal strips  12 . The metal strips  12  in this case connect electrical components, such as a brush holder  16 , to a connecting plug  10 . 
         [0019]    However, connections such as these have the disadvantage, as has already been explained above, that the individual conductors are in some cases exposed, and can therefore easily be damaged and become dirty. 
         [0020]    In contrast, a first embodiment of the invention, as shown in  FIG. 4 , provides a connecting support  20  which comprises at least one upper part  22  and one lower part  24  which are detachably connected to one another. The upper part  22  and the lower part  24  form a receptacle  26  for at least one electrically conductive metal strip  28 , wherein they preferably essentially completely surround the metal strip, thus protecting it against dirt and damage. The lower part  24  and the upper part  22  in this case, as a receptacle  26 , form a flat surface on which the metal strip  28  is loosely arranged. Furthermore, an opening  30  is provided in the lower part  24  at one end of the connecting support  20 , through which opening  30  the metal strip  28  can be passed. As is shown in  FIG. 4 , the lower part  24  is in this case detachably connected, for example, to a control contact pick-up  32 . The control contact pick-up  32  in this case has a contact spring  34 . Alternatively, instead of the control contact pick-up  32 , a plug with a plug housing, for example, can also be attached to the connecting support  20 . The metal strip  28  runs on the other side of the connecting support  20  between the upper part and the lower part  22 ,  24 , wherein the upper part  22  and the lower part  24  can be connected, for example, to a plug housing  36  with a plug  38 . In principle, the two ends of the connecting support  20  may also each be formed identically, that is to say, at both ends, in each case only the lower part  24 , for example, is connected to a plug housing  36  or to a control contact pick-up  32 . Alternatively, the upper part  22  and the lower part  24  are respectively connected to a plug housing  36  and to a control contact pick-up  32  at the two ends of the connecting support  20 . 
         [0021]    In the embodiment illustrated in  FIG. 4 , the connecting support  20  and its metal strip  28  are, for example, detachably connected to a plug housing  36  and its plug  38 , and to a control contact pick-up  32  and its contact spring  34 . Alternatively, the connecting support  20  and its metal strip  28  may also be firmly connected at least one end for example to the plug housing  36  and its plug  38  or to the control contact pick-up  32  and its contact spring  34 . For this purpose, the metal strip  28  can be connected to the plug  38  or to the contact spring  34  for example by means of soldering or welding. 
         [0022]      FIG. 5  shows a plan view of the lower part  24  of a second embodiment of the connecting support  20  according to the invention. The lower part  24  in this case differs from the lower part  24  shown in  FIG. 4  in that it has a receptacle  26  in the form of a depression, into which a metal strip  28  is inserted. The depression is designed such that the metal strip is inserted into the depression horizontally. Alternatively, the depression may also be in the form of a slot, into which the metal strip is inserted vertically. 
         [0023]    If the aim is to fit the connecting support  20  with a plurality of electrically conductive metal strips  28  it is possible, for example, to provide a plurality of depressions in the lower part  24  and/or upper part  22 , into which the metal strips  28  are loosely inserted. In this case, the receptacles  26  in the form of depressions have the advantage over an embodiment in which the metal strips  28  are arranged separated on a flat surface that the metal strips  28  are guided securely in the depressions, and cannot slide with respect to one another. This makes it possible to reliably prevent the possibility of an electrical contact, and thus of a short circuit, occurring. However, in addition to depressions, it is also possible to provide holders, for example in the form of projections (not illustrated) on the upper part  22  and/or on the lower part  24 , which are arranged on both sides of a metal strip  28 , in order to guide it. In this case, the projections may be arranged continuously or on various sections of the respective metal strip  28 . The above-mentioned options for attaching a metal strip  28  merely represent examples of a large number of ways in which such receptacles  26  can be designed. 
         [0024]    The dimensions of the electrical metal strips  28 , for example the strip width, may be chosen appropriately for a desired current load, wherein the metal strips  28  may also have different widths, depending on the purpose. Receptacles  26 , to be precise depressions or projections in the lower part  24  and in the upper part  26 , may for this purpose have dimensions which are matched to different widths of the metal strips  28 , or may have a standard width. 
         [0025]    The upper part  22  and the lower part  24  may each be in the form of a separate part, as is illustrated in  FIGS. 4 and 5 . In one alternative embodiment, the upper part  22  can also be connected to the lower part  24  via at least one hinge (not illustrated). This has the advantage that the upper part  22  is just folded up for insertion or replacement of a metal strip  28 , and need not be removed completely, and therefore cannot be lost either. In principle, the upper part  22  may also be formed from a plurality of upper-part sections which can be removed or folded up individually. 
         [0026]    Furthermore, the upper part  22  can be detachably attached to the lower part  24  for example by means of screwing and/or clipping and/or latching, and vice versa. 
         [0027]      FIG. 6  shows a schematic view of an auxiliary drive  2  to which the connecting support  20  according to the invention is attached. The connecting support  20  is in this case electrically connected on one side to a control contact pick-up  32 . In this case, the connecting support  20  is arranged with the control contact pick-up  32  on the transmission housing  40 , preferably radially with respect to contact tracks  42  on a spur gear (not illustrated). The contact tracks  42  are in this case indicated by dashed lines. Alternatively, the connecting support  20  may also, for example, be arranged on a transmission housing cover (not illustrated) instead of being arranged on the transmission housing  40 , or on some other suitable component. The connecting support  20  extends from the transmission housing  40  to the pole housing  44 . In this case, at its other end, the connecting support  20  has a plug housing  36  with a plug, which are in turn electrically connected to a brush holder  46 . A plurality of electrically conductive metal strips  28 , which are indicated by dashed lines, are arranged in the connecting support  20 . 
         [0028]    The connecting support  20  is designed such that it electrically connects control contacts as electrical functional elements, via the control contact pick-up  32  to the plug and the brush holder  46  via the inserted metal strips  28 . The connecting support  20  is designed such that it can easily be attached to parts of the auxiliary drive  2 , such as the pole housing  44  and the transmission housing  40  or, for example, a transmission housing cover. The connecting support  20  may in this case, for example, be screwed, clipped or latched in, adhesively bonded and/or welded to these parts, to mention just a few of the large number of attachment options with which an average person skilled in the art will be familiar. Since the upper part  22  and the lower part  24  are detachably connected to one another, there is no need, for example, to remove the entire connecting support  20  if one metal strip  28  is damaged. For example, the lower part  24  of the connecting support  20  can thus be firmly attached to a transmission housing  40 , while the upper part  22  is just clipped onto the lower part  24 . In consequence, only the upper part  22  need be removed in order to gain access to the inserted metal strips  28 . Furthermore, the connecting support  20  may, for example, easily be plugged onto a plug housing  36  or a control contact pick-up  32  in order in this way to connect the plug or the brush holder to control contacts. The connecting support  20  can thus be fitted easily and at low cost. 
         [0029]    As an alternative to the embodiment described above, in which the connecting support comprises an upper part  22  and a lower part  24  which are detachably connected to one another, the connecting support may also be formed integrally. The connecting support (not illustrated) in this case preferably essentially completely surrounds one or more metal strips in order to protect them against dirt and damage. In this case, the connecting support can be produced by extrusion coating of the metal strips, for example by means of plastic. In this case, the metal strips are likewise arranged at an adequate distance from one another, as a result of which they cannot make electrical contact with one another later, in the extrusion-coated state. Furthermore, the metal strips may likewise be arranged or extrusion coated in various layers in the connecting support. This means that the metal strips may, for example, be arranged horizontally and/or vertically, or in other orientations with respect to one another, depending on the purpose. In this case, the width of the metal strips may also be varied depending on the current load. Furthermore, as in the case of the embodiment described with reference to  FIG. 4 , the connecting support may be connected at least one end for example to a plug housing and a plug, or to a control contact pick-up and a contact spring. In this case, these may each be firmly and/or integrally or detachably connected to the connecting support and its metal strips. In this case, the metal strip may, for example, be connected to the plug or the contact spring by means of soldering or welding. Furthermore, the connecting support may in this case be attached to an auxiliary drive ( 2 ), for example to its pole housing ( 44 ), transmission housing ( 40 ) and/or transmission housing cover, by means of screwing, adhesive bonding, welding and/or clipping. The connecting support may in this case be designed and arranged in a similar manner to the embodiment shown in  FIG. 6 .