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Electric machine for motorized adjustment of movable parts in a motor vehicle and method for manufacturing the electric machine

A technology for motor vehicles and moving parts, applied to the static parts of the magnetic circuit, manufacturing the stator/rotor body, the shape/style/structure of the magnetic circuit, etc., which can solve the problems of high installation costs

Inactive Publication Date: 2019-03-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this embodiment, two spring elements are required to fix the two magnets, which increases the total number of installed parts and its installation is relatively expensive

Method used

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  • Electric machine for motorized adjustment of movable parts in a motor vehicle and method for manufacturing the electric machine
  • Electric machine for motorized adjustment of movable parts in a motor vehicle and method for manufacturing the electric machine

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Embodiment Construction

[0021] exist figure 1 shows an electric machine 10 according to the invention, which is designed as an electric motor 11 . The electric motor 11 is, for example, a component of a transmission drive unit, which is used, for example, to adjust a sunroof, door windows or seat parts in a motor vehicle. The electric machine 10 has a stator 12 formed by pole shoes 14 with a circular cross section. The pole piece 14 has a cylindrical peripheral wall 16 to which a permanent magnet 18 is fastened. The permanent magnet 18 is embodied in the form of a shell and rests with its radial outer side 19 on the inner side 17 of the peripheral wall 16 . The permanent magnet 18 can be designed, for example, as a ferromagnetic or rare-earth magnet, in particular a NdFeB magnet. In this exemplary embodiment of a 4-pole electric machine 10 with four permanent magnets 18 , holding elements 20 or fastening elements are formed on the pole piece 14 at two opposite locations 21 of the peripheral wall 1...

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PUM

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Abstract

The invention relates to a motor (10) and a method for manufacturing the motor. The motor is especially used for adjusting a movable part in a motor vehicle in a motor manner. The motor comprises a stator (12) comprising a pole shoe (14) with a cylindrical peripheral wall (16), and a permanet magnet (18) is fixed on the peripheral wall and interacts with a rotor. A holding member (20) extending inward radially is formed integrally with the peripheral wall (16) on the inner side (17) thereof. THe holding member is provided with a stop (22, 77) for the permanet magnet (18).

Description

technical field [0001] The invention relates to an electric machine and a method for producing the electric machine. Background technique [0002] No. 8,307,533 discloses an electric motor in which the pole piece has two opposite rounded side walls and two flat side walls between them. Two permanent magnets are arranged opposite to each other on the arc-shaped side walls, wherein a bow spring is arranged on each of the flat side walls, and the bow springs press the permanent magnets towards the inner side of the pole pot wall. In this embodiment, two spring elements are required to fix the two magnets, which increases the overall number of installed parts and its installation is relatively expensive. In flat pole shoes, the flat side walls form the abutment surfaces for the shell-shaped magnets, thereby positioning the magnets with respect to the circumferential direction. When using ring-shaped pole pieces, the fastening principle with two bow springs no longer works, sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/18H02K1/17H02K15/02
CPCH02K1/17
Inventor R·布劳恩F·施文德曼J·赫普H·席勒
Owner ROBERT BOSCH GMBH