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Electrical machine

A technology of electric motors and laminations, applied in the field of electric motors, can solve problems such as uneven shafts and unsatisfactory coaxiality, and achieve the effect of low cost

Inactive Publication Date: 2010-01-13
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In solutions using knurling, the coaxiality that occurs after installation does not meet the requirements of all applications
Also, especially when the lamination pack is very long, the manufacture of notches or knurling introduces the danger of the shaft becoming uneven

Method used

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Examples

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Embodiment Construction

[0030] figure 1 Indicates a motor 8 ( figure 2 ) of a lamination 5 of the lamination pack 6 of the rotor 7 . The electric machine 8 can in particular be designed in the form of an electric motor for a motor vehicle. The electric motor 8 itself is especially suitable for adjusting vehicle components, such as a retractable top, windows or seats, by means of external force. Also, the motor 8 can be used as a power steering motor. However, the electric machine 8 according to the invention is also suitable for other applications.

[0031] The laminations 5 of the lamination stack 6 of the rotor 7 have centering projections 1 which enable concentric accommodation of a shaft which can be inserted into central recesses 9 of the laminations 5 . Furthermore, the lamination 5 has a resilient protrusion 3 in the shape of a nose. The elastic protrusion 3 realizes the fixing of a plurality of laminations 5 on the shaft 10 or the fixing of the lamination group 6 on the shaft 10 by mean...

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PUM

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Abstract

The invention relates to an electrical machine (8), in particular an electric motor, suitable for the adjustment by external force of elements of a motor vehicle, essentially for driving a steering booster. The inventive electrical machine comprises a rotor (7) and a shaft (10), the rotor having a plurality of plates (5), wherein the plates (5) are premounted on the shaft either indivdually or as a plate assembly (6) or by means of a plurality of plate assemblies (6), the rotor (7) being connected to the shaft (10). The plates (5) have resilient lugs (3) for fixing the plates (5) and / or plate assemblies (6) to the shaft (10). Furthermore, the plates (5) of the plate assemblies (6) comprise centering lugs (1) which serve to radially center the plate assembly (6) relative to the shaft (10). An attachment of the stator (15) in a housing part (16) is possible, wherein centering lugs (1) at the plates (5) of the plate assembly (6) of the stator (15) serve to center the plate assembly (6) of the stator (15) relative to the shaft (10).

Description

Background technique [0001] The invention relates to electric machines, especially electric machines comprising a rotor and a shaft. More precisely, the invention relates to the field of electric motors for motor vehicles, in particular electric motors for use as electric auxiliary drives for manipulating or assisting the adjustment of vehicle components by means of external forces. [0002] DE 19523789 A1 discloses an electric motor comprising a rotor, a stator and other components mounted in a motor housing. There are multiple stator windings on the stator core of the stator. Such a stator core is fixedly mounted on the outer circumference of a socket and consists of a magnetic or magnetizable material. Also, the rotor is firmly mounted on the shaft of the motor. During operation, the normal currents supplied to the various stator windings on the stator core are controlled by means of the control circuit in such a way that a rotating magnetic field occurs within the elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/18H02K1/28
CPCH02K1/28H02K1/185H02K1/18
Inventor S·奥森科普J·贝克H·克拉特E·莫勒N·-T·阮S·斯托尔梅B·霍滋瓦思T·科伊尼格
Owner ROBERT BOSCH GMBH
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