Abstract:
A retaining assembly for fixing a flange part, which is provided on a braking device, to a firewall of a motor vehicle, the firewall separating an engine chamber from a vehicle interior. A retaining plate is secured to the firewall face facing the engine chamber, and the flange part and the retaining plate are engaged with each other by both a form-fitting as well as force-fitting connection.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is the U.S. National Phase Application of PCT International Application No. PCT/EP2014/069480, filed Sep. 12, 2014, which claims priority to German Patent Application No. 10 2013 220 573.2, filed Oct. 11, 2013 and German Patent Application No. 10 2014 201 704.1, filed Jan. 31, 2014, the contents of such applications being incorporated by reference herein. 
     FIELD OF THE INVENTION 
     The invention relates to a retaining subassembly for fixing a flange portion which is provided on a brake device to a bulkhead of a motor vehicle. 
     BACKGROUND OF THE INVENTION 
     A retaining subassembly for fixing a flange portion which is provided on a brake device to a bulkhead of a motor vehicle which separates an engine compartment from a vehicle inner space is known, for example, from DE 44 03 466 A1 which is incorporated by reference. The retaining subassembly has two stay bolts which are introduced from the flange portion of the brake device through the bulkhead into the vehicle inner space and which have to be screwed from the vehicle inner space. The complexity for fitting and removing the brake device again is consequently considerable as a result of the poor accessibility of the bulkhead in the vehicle inner space. Furthermore, the brake device has to be supported in the engine compartment at the same time in order to prevent it from tilting and falling out. 
     SUMMARY OF THE INVENTION 
     An aspect of the invention improves a retaining subassembly of the type set out in such a manner that, with the least possible structural and functional complexity, particularly simple and rapid assembly of the brake device on the bulkhead is ensured, wherein the supply, orientation and securing of the brake device is intended to be carried out using simple means exclusively at the side of the bulkhead facing the engine compartment. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Other features of the invention can be taken from the individual patent claims and the description of an embodiment with reference to a plurality of drawings, in which: 
         FIG. 1  is a perspective overall view of a retaining subassembly which is provided with the features significant to the invention for the purposes of mounting a brake device on a bulkhead of a vehicle, 
         FIGS. 2 to 4  are plan views of the retaining subassembly with the illustration of individual assembly steps for securing a flange portion which carries the brake device on a retention plate which is connected to the bulkhead, and 
         FIG. 5  is a perspective sectioned illustration through the retaining subassembly after the final fixing of the flange portion to the retention plate. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       FIG. 1  is a perspective view of the significant details of a retaining subassembly for fixing a flange portion  4  which is secured to a brake device to a retention plate  2  which is securely screwed to a bulkhead (not illustrated) of a motor vehicle and which separates an engine compartment from a vehicle inner space. The retention plate  2  and the flange portion  4  are coupled to each other by means of a positive-locking connection  3 , which is explained below with reference to  FIGS. 2 to 5 . 
       FIG. 1  first shows the flange portion  4  which is intended to be secured by means of two screws  16  to the brake device which is not illustrated and the securing of the retention plate  2  to the bulkhead which is not illustrated by means of two retention screws  16 , for which reason there is generally arranged inside the vehicle inner space on the bulkhead a pedal block, in which the two retention screws  16  after being introduced into the two through-holes of the retention plate  2  are screwed in order to secure the retention plate  2 . Between the retention plate  2  and the bulkhead and between the retention plate  2  and the flange portion  4  there is arranged a seal  17  for protection against the introduction of moisture and dirt. 
     As can be seen in  FIGS. 2, 3, 4  as a plan view of the retaining subassembly, there is provided diametrically with respect to the positive-locking connection  3  on the retaining subassembly a non-positive-locking connection  5  which can be seen in terms of all details and which has as a significant element a final fixing screw  13  which is illustrated in all the Figures. 
     Only after the introduction and displacement of the flange portion  4  inside a basin-like recess of the retention plate  2  in the direction of the positive-locking connection  3  (see  FIGS. 2, 3 ) is the flange portion  4 , after the production of the positive-locking connection  3  with the retention plate  2 , finally in a state of connection which is produced permanently by the final fixing screw  3  (see  FIG. 4 ), but which after removal of the final fixing screw  13  can also be readily released again. 
     In order to illustrate the inventively significant features, the illustration of the brake device which is securely connected to the flange portion  4  has been omitted in the selected plan views according to  FIGS. 2 to 4  since the brake device in practice covers the flange portion  4 . As a result of the spatial requirement necessary for the two retention screws  16  and the final fixing screw  13 , the outer periphery of the retention plate  2  which is constructed in an asymmetrical manner is generously expanded in a radial direction. For recessed receiving of the flange portion  4  inside the retention plate  2 , the retention plate  2  has a basin-like recess between the two retention screws  16  which are diagonally introduced into the retention plate  2 , wherein the basin-like recess is delimited by a peripheral frame  6  which resembles the asymmetrical contour of the flange portion  4 . As a result of the asymmetrical end face contour of the flange portion  4 , the flange portion  4  extends radially outward in a flap-like manner for readily accessible receiving and securing of the final fixing screw  13  which is provided in the basin-like recess between the two retention screws  16  of the retention plate  2 . 
     The retention plate  2  consequently receives for the purposes of space-saving rapid securing the flange portion  4  inside the basin-like recess, wherein, for the purposes of the most simple positive-locking connection  3  to the retention plate  2 , the flange portion  4  is partially contacted by the frame  6  which delimits the recess. Diametrically relative to the positive-locking connection  3 , there is fixed to the flange portion  4  the final fixing screw  13  which produces the non-positive-locking connection  5  with the retention plate  2 , which connection can be clearly seen in  FIG. 5  and which according to the assembly steps illustrated in  FIGS. 2  to  4  is produced only after the precise orientation of the flange portion  4  on the retention plate  2 . 
     For the advantageous construction of the positive-locking connection  3 , the thick-walled frame  6  is provided at the side facing away from the non-positive-locking connection  5  with a recess which is preferably constructed as a groove  7  and in which a radial projection  8  which is constructed on the outer periphery of the flange portion  4  in the form of a detent or a wedge engages.  FIGS. 2 to 4  illustrate in this regard individual engagement positions of the wedge-like projection  8  in the groove  7  after the supply and orientation of the flange portion  4  which is connected to the brake device within the basin-like recess of the retention plate  2 . 
     For the precise positive-locking orientation of the flange portion  4  inside the basin-like recess of the retention plate  2 , the retention plate  2  has along the lower portion of the frame  6  a support edge  9  which extends in a linear manner in the introduction direction of the flange portion  4  and which is contacted at the bottom and in an approximately orthogonally orientated manner with respect to the groove  7  by an additional projection  10  which is provided on the outer periphery of the flange portion  4 . The support edge  9  is consequently formed in the manner of an oblique plane below the flange portion  4  by a linear portion of the frame  6  extending parallel with the displacement direction of the flange portion  4  in an oblique downward manner (see auxiliary line Z in  FIG. 2 ) so that after the flange portion  4  has been introduced into the basin-like recess the projection  10  contacts the flange portion  4  along the auxiliary line Z and during the sliding-down action in the basin-like recess of the retention plate  2  is forcibly guided in a linear manner along the frame  6  which extends downward in an oblique manner, whereby the flange portion  4  is supplied with the brake device secured thereto with the wedge-like projection  8  thereof supported by gravitational force precisely to the groove  7  provided in the frame  6 . 
     As can further be seen in  FIGS. 2 to 4 , there is provided on the obliquely downwardly directed linear portion of the frame  6  a groove-like blade receiving member  19  which is in engagement with a blade  14  which protrudes below the final fixing screw  13  on the periphery of the flange portion  4  as soon as the wedge-like projection  8  reaches the groove  7 . 
     Consequently, the orientation of the flange portion  4  on the retention plate  2  is carried out in principle by means of a three-point bearing in the frame  6  by the blade  14  and the two projections  8 ,  10  which are orientated substantially orthogonally relative to each other contacting the frame  6 . The final fixing of the flange portion  4  on the retention plate  2  as illustrated in  FIG. 4  is ultimately carried out by the final fixing screw  13  which is provided above the blade  14  and which is already in a pre-mounted state in the flange portion  4  during the entire assembly operation. 
     Based on the illustration in  FIG. 4 , the perspective illustration according to  FIG. 5  additionally illustrates an inner thread  12  which is provided in the retention plate  2  and which is located as an element of the non-positive-locking connection  5  in a diametric orientation with respect to the two elements (groove  7 , projection  8 ) of the positive-locking connection  3  in a threaded sleeve  11  which is supported with the collar thereof in a hole of the retention plate  2 . As a significant component of the non-positive-locking connection  5 , the final fixing screw  13  is already introduced from the direction of the brake device in a through-hole in the flange portion  4  and screwed in the threaded sleeve  11  so as to be readily accessible. 
     It is further possible to see in  FIG. 5  a retention ring  1  which is inserted in the through-hole of the flange portion  4  and which advantageously enables reliable preassembly of the final fixing screw  13  on the flange portion  4  by, according to the above  FIGS. 1 to 4 , the final fixing screw  13  on the flange portion  4  already being received in the retention ring  1  in a frictionally engaging manner before the ultimate orientation of the flange portion  4  on the retention plate  2 . 
     In order to ensure secure receiving of the final fixing screw  13  in the retention ring  1  and secure receiving of the retention ring  1  in the flange portion  4 , the retention ring  1  preferably comprises a resilient plastics material or a rubber which produces both with the flange portion  4  and with the final fixing screw  13  the required frictionally engaging connection. 
     It can further be clearly seen in  FIG. 5  that the flange portion  4  is constructed as a plate which is partially adapted to the inner contour of the retention plate  2  and which is provided in order to guide a pedal rod with a tubular continuation  15  which extends through an elongate-hole-like or oval opening  18  in the retention plate  2 , wherein the elongate-hole-like or oval opening  18  is adapted to the radial displacement extent of the flange portion  4  required for the assembly of the flange portion  4  on the retention plate  2  (see assembly steps in  FIGS. 2 to 4 ). 
     The retention plate  2  and the flange portion  4  comprise a cast material which can be produced in a cost-effective manner, in particular a die-cast light metal so that there is provided a retention device which is simple to construct with respect to the projection  10  and which has oblique contact faces which are simple to constitute within the positive-locking connection  3  (in the region of the projection  8  and the groove  7 ) in order to be able to produce the positive-locking connection  3  in a play-free manner in the final fixing of the flange portion  4  on the retention plate  2 , in particular in an axial direction of the brake device. 
     Further ease of assembly results from the final fixing screw  13  being received in the retention ring  1  of the flange portion  4 , whereby confusion with other screws can be eliminated and the brake device can immediately be securely screwed in the final orientation of the flange portion  4  on the retention plate  2 . Furthermore, the receiving of the final fixing screw  13  in the retention ring  1  facilitates the location of the thread  12  in the retention plate  2 . 
     LIST OF REFERENCE NUMERALS 
     
         
           1  Retention ring 
           2  Retention plate 
           3  Positive-locking connection 
           4  Flange portion 
           5  Non-positive-locking connection 
           6  Frame 
           7  Groove 
           8  Projection 
           9  Support edge 
           10  Projection 
           11  Threaded sleeve 
           12  Thread 
           13  Final fixing screw 
           14  Blade 
           15  Continuation 
           16  Retention screw 
           17  Seal 
           18  Opening 
           19  Blade receiving member