Abstract:
In the case of a housing part according to the related art, it is still necessary to assemble many components using additional assembly steps. They include a connector and a brush holder, for example.  
     A housing part ( 1 ) designed according to the invention comprises a brush holder ( 36 ) and mounting feet ( 33 ) that are designed integral with the housing part ( 1 ), so that further assembly steps are eliminated.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    The invention is based on a housing part for an electrical adjusting drive according to the general class of claim 1.  
           [0002]    The act of applying a plastic coating to a pressed screen by means of injection molding is made known EP 0 639 884 B1 and U.S. Pat. No. 5,521,785, whereby housing parts for an electric motor are mounted on the plastic coating.  
           [0003]    DE 197 02 833 A1 and U.S. Pat. No. 5,762,579 show a gearbox housing cover on which a pressed screen comprising sliding contacts is located.  
         ADVANTAGES OF THE INVENTION  
         [0004]    In contrast, the housing part according to the invention having the characterizing features of claim 1 has the advantage that many components of an electrical adjusting drive are simply and easily integrated on the housing part, thereby reducing the assembly times and the number of parts to be assembled.  
           [0005]    Advantageous further developments and improvements of the housing part named in claim 1 are made possible by the measures listed in the dependent claims.  
           [0006]    A pressed screen is advantageously used for the internal conductor tracks or the external conductor tracks, because they are easy to produce and bend starting with a piece of sheet metal.  
           [0007]    The external conductor tracks can advantageously comprise sliding contacts that, together with potentiometer tracks of the electrical adjusting drive, make it possible to control the electrical adjusting drive.  
           [0008]    The housing part can advantageously comprise recesses in which electrical elements such as thermal circuit breakers, interference-suppression chokes, capacitors, etc., are located, by way of which the electrical elements are more easily mounted on the housing part.  
           [0009]    The internal conductor tracks advantageously form plug-in contacts for a connector, whereby the connector housing is advantageously formed integral with the housing part. This reduces the number of parts to be assembled.  
           [0010]    The housing part comprises at least one mounting foot, with which the electrical adjusting drive can be attached to a mount, for example, when the housing part is joined with the electrical adjusting drive.  
           [0011]    It is advantageous when the housing part comprises a brush holder designed integral with said housing part, because this eliminates the installation of an additional brush holder on the housing part or the motor housing of the electrical adjusting drive.  
         SUMMARY OF THE DRAWINGS  
         [0012]    Exemplary embodiments of the invention are shown in the drawing in simplified form and are described in greater detail in the subsequent description. 
       
    
    
       [0013]    [0013]FIG. 1 a  shows a housing part, designed according to the invention, comprising internal and external conductor tracks. FIG. 1 b  shows a housing part designed according to the invention, according to FIG. 1 a  with a connector housing,  
         [0014]    [0014]FIG. 2 shows a housing part designed according to the invention, according to  2  FIG. 1 a  with sliding contacts,  
         [0015]    [0015]FIG. 3 shows the arrangement of electrical elements in recesses of a housing part designed according to the invention, and the electrical contacting of them by means of insulation piercing connecting devices,  
         [0016]    [0016]FIG. 4 shows a housing part designed according to the invention comprising mounting feet,  
         [0017]    [0017]FIG. 5 shows a brush holder that is designed integral with the housing part designed according to the invention, and  
         [0018]    [0018]FIG. 6 shows an exemplary embodiment of a housing part designed according to the invention. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0019]    [0019]FIG. 1 a  shows a partial view of a sectional drawing of a housing part  1 , according to the invention, made of plastic, for example, in which at least one internal electrical conductor track  4  is at least partially located by means of a plastic coating applied by injection molding or casting around, for example.  
         [0020]    The housing part  1  can be a cover or a base or an upper part or a lower part of a gearbox housing and/or a motor housing of an electrical adjusting drive, such as a windshield wiper drive or a power-window drive for motor vehicles, for example.  
         [0021]    The internal conductor tracks  4  can be electrical cables. The conductor tracks  4  are preferably formed by a pressed screen, for example.  
         [0022]    The internal conductor tracks  4  project at least partially out of the housing part  1  and are joined in electrically conductive fashion with at least one external conductor track  7  outside of the housing part  1 , for example, whereby they do not represent terminal lugs of electrical components.  
         [0023]    The external conductor tracks  7  are also formed by a pressed screen, for example, and are held on the housing part  1 , e.g., by the electrical-and, therefore, mechanical as well-contacting on the internal conductor tracks  4  permanently enclosed in the housing part  1 . Additionally, the housing part  1  can be joined with the external conductor tracks  7  by means of further fastening elements such as detent and clamp connections.  
         [0024]    A connector  10  is formed by a part of the internal conductor track  4  that projects out of the housing part  1 , i.e., the plug-in contacts  16 , and a connector housing  13  formed as a part of the housing part  1  (FIG. 1 b ). The connector housing  13  can also be developed separate from the housing part  1 , so that it can be adapted to customer-specific desires.  
         [0025]    The connector  10  serves to connect to an external electrical power source that supplies the electrical elements located on the housing part  1  with electric current or voltage.  
         [0026]    [0026]FIG. 2 shows a part of a housing part  1  designed according to the invention, in the case of which one end of the external electrical conductor track  7  is bent by more than 90° out of its plane of attachment, so that it forms sliding contacts  19 .  
         [0027]    The sliding contacts  19  can also be formed by internal conductor tracks  4 .  
         [0028]    The sliding contacts  19  are designed with spring action, i.e., force must be used to press them toward the housing part  1  and, once the force is released, they spring back.  
         [0029]    An electrical contact point  20  on the end of the sliding contact  19  forms the electrical contact with a not shown potentiometer track on another housing part. By means of electrical potentiometer tracks that are located in the electrical adjusting drive, e.g, in the gearbox housing, the electrical adjusting drive can be switched on and off, for example.  
         [0030]    Copper, for example, is used as the material for the contact point  20 , and said contact point is designed at least partially spherical in shape.  
         [0031]    [0031]FIG. 3 shows the arrangement of at least one electrical element  24  in at least one recess  22  of a housing part  1  designed according to the invention. An electrical interference-suppression choke  27 , for example, as an electrical element  24 , is located in a recess  22  of the housing part  1 . The recess  22  is designed in such a fashion, for example, that the interference-suppression choke  27  fits tightly in it and is held in this fashion. The interference-suppression choke  27  can also be situated loosely in the recess  22 , whereby a secure fastening to the housing part  1  takes place by means of the electrical and, therefore, the mechanical contact with the mechanically stiff external conductor tracks  7 .  
         [0032]    The interference-suppression choke  27  is joined at both ends with the ends of the external electrical conductor track  7  by means of “insulation piercing connecting devices”  30  or by soldering or welding. Capacitors to provide damping in the electric circuit and/or thermal circuit breakers for protection against overheating of the electrical elements  24  and yaw-rate sensors represent further electrical elements  24  that are located on the housing part  1 , preferably in the recess  22 .  
         [0033]    Mounting feet  33 , for example, are required for installing the adjusting drive (not shown) (FIG. 4), in order fasten the adjusting drive to a wall, for example, an interior wall of a motor vehicle, for example. The mounting feet  33  are designed integral, for example, with the housing part  1  designed according to the invention. Two mounting feet  33  are used in this example. The mounting feet  33  can be adapted to specific customer requests. Mounting holes  34 , for example, are provided on their ends, through which screws, for example, can be guided.  
         [0034]    Additionally, a rubber ring  35  can be provided at the mounting hole  34  for damping the adjusting drive against the mounting wall.  
         [0035]    [0035]FIG. 5 shows a brush holder  36  that is designed integral, for example, with the housing part  1  according to FIGS. 1 a ,  1   b ,  2 ,  3 ,  4  and designed according to the invention. The brush holder  36  is composed of at least one brush  39  that bears against a commutator (not shown) of an electric motor of the electrical drive unit. The brush  39  is pressed against the commutator by means of a spring  45 . The electrical power supply takes place via the external connector  10 , plug-in contacts  16 , internal conductor tracks  4 , external conductor tracks  7 , which, in turn, are then electrically connected with the brush  39  by means of brush leads  42 .  
         [0036]    [0036]FIG. 6 shows a top view of a housing part  1  designed according to the invention having the parts shown in FIG. 1 a ,  1   b  and  2  through  5 .  
         [0037]    The sliding contacts  19  are connected with the internal conductor tracks  4  in electrically conductive fashion, which said internal conductor tracks extend inside the housing part  1  up to the connector housing  13  (shown as dashed lines in the connector housing  13 ). There they are connected with control electronics via an external connector (not shown). The control electronics can also be located on the gearbox housing part  1 . The brush holder  36  is formed by two high spots  47 , for example, into which the brushes  39  are guided.