Electromotor/pump assembly

Details Electromotor/pump assembly Electromotor/pump assembly

1999-12-02

2001-04-24

Freay, Charles G. (Department: 3746)

Pumps

Motor driven

Including means for facilitating assembly or disassembly of...

C464S092000

Reexamination Certificate

active

06220827

ABSTRACT:

BACKGROUND OF THE IVENTION
The present invention relates to an electric-motor-and-pump assembly including at least one bearing for the mounting support of a motor shaft in a motor housing, and a pump which is adapted to be attached to the motor and has at least one bearing for the mounting support of a pump shaft in a pump housing.
German application DE-OS 32 32 083 discloses a motor-and-pump assembly of this type. Torques are transmitted from the electric motor to the pump assembly by way of a pin shaped on a pump shaft end and engaging into a groove provided on the motor shaft end. The occurring torque is reliably transmitted by this arrangement, however, mounting of the assembly is complicated because the motor and pump can be installed only in a defined position of the shafts in relation to each other. Consequently, it is necessary to precisely maintain the assembly position and to make position checks. Manufacturing tolerances and a clearance provided to facilitate the assembly may provide a certain relief. It has shown, however, that a clearance between the shafts, both in radial and axial directions, produces undesirable noises during operation.
Therefore, an object of the present invention is to provide an electric-motor-and-pump assembly which offers ease of assembly and minimizes noises during operation.
SUMMARY OF THE INVENTION
This object is achieved in that the two shafts are interconnected by way of a force-lockingly operative transmission element.
The force-lockingly operative transmission element further compensates for alignment deviations and angular deviations of the two shafts relative to one another in a particularly favorable fashion without causing the development of undesirable noises.
Further aspects of the present invention can be taken from the description and the drawings.
The present invention will be described in detail in the following by way of embodiments which are shown in the drawings.


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