Patent ID: 6196812
Filing Date: 2001-03-06
Classification: B60T,F04B,F16C

Abstract:
A pump unit comprising a piston pump with at least one pump piston in a pump block (4) and a motor housing part that is secured onto the pump block (4) and is a part of a motor housing (6) for a drive motor (2), a shaft (20) that is driven by the drive motor (2), the shaft drives at least one pump piston, wherein the shaft (20) is supported by first and second bearings (21, 22), with the first bearing (21) being contained by the motor housing part (6, 6a), the drive motor (2), the motor housing part (6, 6a), the shaft (20), and the first and second bearings (21) constitute a preassembled unit (40), which is mounted onto the pump block (4) with first and second radial clearance fits (41, 42), wherein after the preassembled unit (40) is mounted onto the pump block (4), the first and second radial clearance fits (41, 42) are eliminated by introduction of a plastic (44) into the first and second clearance fits (41, 42), in a vicinity of the first bearing (21), the motor housing part (6, 6a) constitutes a projection (6f, 26) that engages in a recess (10, 10a) provided in the pump block (4), wherein the first radial clearance fit (41) eliminated by the introduced plastic (44) is provided between the projection (6f, 26) and the recess (10, 10a), and the first and second radial clearance fits (41 and 42), which are eliminated by the introduced plastic (44), are respectively provided between the projection (6f, 26) on the motor housing part (6, 6a) and the recess (10, 10a) in the pump block (4) and between the second bearing (22, 22b) and the pump block (4).