Motor/Pump Assembly With Improved Sealing

Abstract

A motor/pump assembly, in particular for a motor vehicle braking apparatus is fixed axially on an end face of the pump housing. The brush plate forms the termination face of the motor with respect to the pump housing. The boundary area of the motor housing which faces the pump housing and that area of the brush plate which is radially adjacent to the boundary area of the motor housing each have a seal-accommodating step, into which a seal is inserted which is compressed axially by the pump housing being fixed to the motor.

1 . A motor/pump unit comprising:
 a motor having a pot-shaped motor housing and a brush plate provided in the motor housing, and   a pump having a pump housing, wherein   the motor is secured axially to an end face of the pump housing,   the brush plate forms the terminating face of the motor with respect to the pump housing,   the edge region of the pot-shaped motor housing facing the pump housing has a seal-accommodating stage,   the region of the brush plate radially adjacent to the edge region of the motor housing likewise has a seal-accommodating stage, and   inserted into said seal-accommodating stages is a seal which is axially compressed through securing of the pump housing on the motor.   
   
   
       2 . The motor/pump unit according to  claim 1 , wherein
 the seal-accommodating stage of the brush plate is slanted so that the seal-accommodating stage has sides that enclose an angle less than 90°.   
   
   
       3 . The motor/pump unit according to  claim 1 , wherein
 the seal-accommodating stage of the motor housing has a slant on which is provided a monitoring area at which the presence of the seal is detected.   
   
   
       4 . The motor/pump unit according to  claim 1 , wherein the motor is secured axially to an end face of the pump housing by means of a screw connection. 
   
   
       5 . The motor/pump unit according to  claim 1 , wherein a rotor shaft of the motor is ducted through a bearing into the pump housing and secured to the pump housing in a bearing of the pump. 
   
   
       6 . The motor/pump unit according to  claim 2 , wherein the seal-accommodating stage has sides that enclose an angle of about 45°. 
   
   
       7 . The motor/pump unit according to  claim 1 , wherein the seal is circumferential sealing washer. 
   
   
       8 . A method for sealing motor/pump unit comprising the steps of:
 providing a motor having a pot-shaped motor housing and a brush plate provided in the motor housing, and   providing a pump having a pump housing, wherein the brush plate forms the terminating face of the motor with respect to the pump housing, the edge region of the pot-shaped motor housing facing the pump housing and the region of the brush plate radially adjacent to the edge region of the motor housing form a mutually adjacent seal-accommodating stage;   inserting a seal into the mutually adjacent seal-accommodating stage;   securing the motor axially to an end face of the pump housing.   
   
   
       9 . The method according to  claim 8 , wherein
 the seal-accommodating stage of the brush plate is slanted so that the seal-accommodating stage has sides that enclose an angle less than 90°.   
   
   
       10 . The method according to  claim 8 , wherein
 the seal-accommodating stage of the motor housing has a slant on which is provided a monitoring area at which the presence of the seal is detected.   
   
   
       11 . The method according to  claim 8 , wherein the motor is secured axially to an end face of the pump housing by means of a screw connection. 
   
   
       12 . The method according to  claim 8 , wherein a rotor shaft of the motor is ducted through a bearing into the pump housing and secured to the pump housing in a bearing of the pump. 
   
   
       13 . The method according to  claim 9 , wherein the seal-accommodating stage has sides that enclose an angle of about 45°. 
   
   
       14 . The method according to  claim 9 , wherein the seal is circumferential sealing washer.