Arrangement and method for fitting a brake assist device in a motor vehicle

Abstract

The invention relates to an arrangement for fitting a brake assist device ( 10 ) in a motor vehicle having at least one fastening element ( 18, 20 ), which is disposed on and projects from a housing ( 12 ) of the brake assist device ( 10 ), wherein the at least one fastening element ( 18, 20 ) is provided with a retaining structure, by means of which it is fastenable to a vehicle chassis. The invention further provides that an adapter device ( 22 ), which is fastenable to the vehicle chassis so as to face the brake assist device ( 10 ) and which comprises at least one receiving opening ( 34, 36 ) for receiving the at least one fastening element ( 18, 20 ), wherein there is associated with the at least one receiving opening ( 34, 36 ) in each case a complementary retaining structure that interacts with the retaining structure on the at least one fastening element ( 18, 20 ).

1 . Arrangement for fitting a brake assist device ( 10 ;  110 ) in a motor vehicle having at least one fastening element ( 18 ,  20 ;  118 ,  120 ), which is disposed on and projects from a housing ( 12 ;  112 ) of the brake assist device ( 10 ;  110 ), wherein the at least one fastening element ( 18 ,  20 ;  118 ,  120 ) is provided with a retaining structure, by means of which it is fastenable to a vehicle chassis, characterized by an adapter device ( 22 ;  122 ), which is fastenable to the vehicle chassis so as to face the brake assist device ( 10 ;  110 ) and which comprises at least one receiver ( 34 ,  36 ;  184 ,  186 ) for receiving the at least one fastening element ( 18 ,  20 ;  118 ,  120 ), wherein there is associated with the at least one receiver ( 34 ,  36 ;  184 ,  186 ) in each case a complementary retaining structure that interacts with the retaining structure on the at least one fastening element ( 18 ,  20 ;  118 ,  120 ).  
   
   
       2 . Arrangement according to  claim 1 , 
 characterized in that the brake assist device ( 10 ;  110 ) is formed by a brake force generator or by a brake booster.    
   
   
       3 . Arrangement according to  claim 1 , 
 characterized in that the adapter device ( 22 ;  122 ) is constructed with fastening bores ( 28 ;  128 ) for engine-compartment side fitting to a splashboard of the motor vehicle.    
   
   
       4 . Arrangement according to  claim 1 , 
 characterized in that the adapter device ( 22 ;  122 ) has a receiving channel ( 32 ;  132 ) for receiving an actuating input portion ( 14 ;  114 ) of the brake assist device ( 10 ;  110 ).    
   
   
       5 . Arrangement according to  claim 4 , 
 characterized in that the receiving channel for receiving an actuating input portion ( 14 ;  114 ) and the receiving opening for receiving the at least one fastening element ( 18 ,  20 ;  118 ,  120 ) coincide.    
   
   
       6 . Arrangement according to  claim 1 , 
 characterized in that the at least one fastening element ( 18 ,  20 ) is formed by a profiled bolt, which is provided at its free end with a diameter contraction ( 54 ) forming the retaining structure, wherein the adapter device ( 22 ) is provided with in each case one detent spring ( 38 ,  40 ), which is fitted in the receiving opening ( 34 ,  36 ) and engages into the diameter contraction ( 54 ).    
   
   
       7 . Arrangement according to  claim 6 , 
 characterized in that the detent spring ( 38 ,  40 ) is locked in its associated receiver ( 34 ,  36 ) against an axial movement.    
   
   
       8 . Arrangement according to  claim 6 , 
 characterized in that the profiled bolt ( 46 ) is provided with a pilot pin or/and with a spreader ramp ( 48 ).    
   
   
       9 . Arrangement according to  claim 1 , 
 characterized by a, preferably elastic, buffer element ( 60 ), which is disposed between the adapter device ( 22 ) and the brake assist device ( 10 ).    
   
   
       10 . Arrangement according to  claim 1 , 
 characterized in that the at least one fastening element ( 118 ,  120 ) is formed by a headed bolt, which is provided at its free end with a detent head ( 166 ,  168 ) of enlarged diameter that forms the retaining structure, wherein the respective associated receiver ( 176 ,  178 ) of the adapter device ( 122 ) is designed in the form of a bayonet groove for receiving and locking in each case one headed bolt ( 118 ,  120 ).    
   
   
       11 . Arrangement according to  claim 10 , 
 characterized in that the bayonet groove for fixing the brake assist device comprises in each case a ramp profile ( 188 ), which interacts with the headed bolt ( 118 ,  120 ) and onto which the headed bolt ( 118 ,  120 ) runs during fitting of the brake assist device on the adapter device ( 122 ).    
   
   
       12 . Arrangement according to  claim 10 , 
 characterized by a stop face ( 192 ) on the bayonet groove that provides a predefined relative position between brake assist device ( 110 ) and adapter device ( 122 ).    
   
   
       13 . Arrangement according to  claim 1 , 
 characterized in that the fastening element is designed as a shank portion that projects from the brake assist device, and that the adapter device has a corresponding counterpart shank portion ( 230 ,  314 ) that is connectable to the shank portion.    
   
   
       14 . Arrangement according to  claim 13 , 
 characterized in that the shank portion ( 214 ) is insertable into the counterpart shank portion ( 230 ), wherein the shank portion ( 214 ) on its outer peripheral surface has the retaining structure ( 220 ), in particular a bayonet locking formation, and that the counterpart shank portion ( 230 ) on its inner peripheral surface ( 232 ) has the complementary retaining structure ( 234 ), in particular a complementary bayonet locking formation.    
   
   
       15 . Arrangement according to  claim 13 , 
 characterized in that the counterpart shank portion ( 314 ) is insertable into the shank portion ( 330 ), wherein the counterpart shank portion ( 314 ) on its outer peripheral surface has the retaining structure ( 320 ), in particular a bayonet locking formation, and that the shank portion ( 330 ) on its inner peripheral surface ( 332 ) has the complementary retaining structure ( 334 ), in particular a complementary bayonet locking formation.    
   
   
       16 . Arrangement according to  claim 1 , 
 characterized in that the fastening element, in particular the shank portion according to  claim 13 , is constructed on a coupling element ( 210 ;  310 ), which may be fitted as a separate component or as an assembly group on the brake assist device.    
   
   
       17 . Arrangement according to  claim 1 , 
 characterized in that on at least one component of adapter device ( 122 ) and brake assist device ( 110 ) a fixing element ( 194 ;  198 ;  200 ) is provided for fixing the brake assist device ( 110 ) on the adapter device ( 122 ) in the predefined relative position.    
   
   
       18 . Arrangement according to  claim 17 , 
 characterized in that the fixing element ( 194 ) is formed by a fixing screw or by a fixing pin.    
   
   
       19 . Arrangement according to  claim 17 , 
 characterized in that the fixing element ( 194 ) is formed by a high-friction surface that interacts with a corresponding counterpart surface on the respective other component of adapter device ( 122 ) and brake assist device ( 110 ).    
   
   
       20 . Arrangement according to  claim 19 , 
 characterized in that the fixing element ( 200 ) comprises a blade formation, which is provided with a number of locking blades ( 202 ) that are aligned sloping at a setting angle (α) in a locking direction.    
   
   
       21 . Method of fitting a brake assist device in a motor vehicle, having an arrangement according to  claim 1 , comprising the steps: 
 A) fitting the adapter device at the engine compartment side on the vehicle chassis,    B) introducing the at least one fastening element into the receiving opening associated therewith in the adapter device and    C) fixing the brake assist device to the adapter device by bringing the retaining structure and the complementary retaining structure into engagement.