Switching disk for contacting windings with a printed circuit board

Patent metadata

Field	Value
Publication number	US-12470106-B2
Application number	US-202318213948-A
Country	US
Kind code	B2
Filing date	Jun 26, 2023
Priority date	Jun 24, 2022
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A switching disk for contacting windings of a stator of an electric motor, which windings are arranged around an axis of rotation, with a printed circuit board of the electric motor, wherein the switching disk has an annular support structure circumferentially extending around the axis of rotation and multiple contact arrangements for contacting the windings with the printed circuit board, which are held by the support structure. The contact arrangements are each formed by a winding contact for contacting one of the windings, a printed circuit board contact offset therefrom in the radial direction for contacting the printed circuit board, and a coupling element extending in the radial direction and electrically connecting the winding contact to the printed circuit board contact.

First claim

The invention claimed is:

1 . A switching disk for contacting windings of a stator of an electric motor, which windings are arranged around an axis of rotation, with a printed circuit board of the electric motor,
wherein the switching disk has an annular support structure circumferentially extending around the axis of rotation and multiple contact arrangements for contacting the windings with the printed circuit board, which are held by the support structure, wherein the contact arrangements are each formed by a winding contact for contacting one of the windings, a printed circuit board contact offset therefrom in the radial direction for contacting the printed circuit board, and a coupling element extending in the radial direction and electrically connecting the winding contact to the printed circuit board contact; and wherein, for each of the contact arrangements, the support structure has a respective receiving space in which the respective winding contact, the respective printed circuit board contact and the respective coupling element are held, in particular in a detachable manner, and a fastening element is arranged in the receiving space, the fastening element designed as a latching hook configured to hold the winding contact and/or the printed circuit board contact and/or the coupling element in the receiving space.

2 . The switching disk according to claim 1 ,
wherein the winding contact and the printed circuit board contact of the contact arrangements are each formed as two parts separate from one another.

3 . The switching disk according to claim 1 ,
wherein the coupling element is in each case formed integrally and/or in one piece with the respective winding contact or the respective printed circuit board contact.

4 . The switching disk according to claim 1 ,
wherein the receiving space is open in the axial direction.

5 . The switching disk according to claim 4 ,
wherein the receiving space, the winding contact, the printed circuit board contact and the coupling element are designed to correspond to one another, and the winding contact, the printed circuit board contact and the coupling element can be plugged into the receiving space in the axial direction.

6 . The switching disk according to claim 1 ,
wherein the printed circuit board contact penetrates the support structure at a passage point in the axial direction, wherein, at the passage point, the support structure forms a press-fit extension extending in the axial direction, which can be press-fitted around the printed circuit board contact for fixing and sealing the printed circuit board contact.

7 . The switching disk according to claim 1 ,
wherein the winding contact and/or the printed circuit board contact and/or the coupling element is/are designed as a stamped and bent part.

8 . The switching disk according to claim 1 ,
wherein the coupling element has a first connecting portion which extends in a first plane extending in the radial direction, wherein the winding contact or the printed circuit board contact has a second connecting portion corresponding thereto, which extends in a second plane orthogonal thereto, and wherein the first connecting portion and the second connecting portion can be plugged into one another in an intersecting manner.

9 . The switching disk according to claim 1 ,
wherein the support structure has a radially outer support structure and a radially inner support structure, at least one of which is designed so as to circumferentially extend around the axis of rotation, in particular in an annular manner, wherein the radially outer support structure and/or the radially inner support structure are designed to support the support structure on a first side on the stator against a force acting from the opposite side in the axial direction.

10 . The switching disk according to claim 9 ,
wherein the radially outer support structure and the radially inner support structure are connected by webs extending in the radial direction, and wherein the radially outer support structure and/or the radially inner support structure have stiffening projections extending in the radial direction.

11 . A stator unit consisting of the stator and the switching disk according to claim 9 ,
wherein the stator has a plurality of stator teeth, each of which is wound with a winding, wherein the stator teeth are enclosed by an encapsulation on which the windings are wound, wherein the radially outer support structure rests radially on the outside on the encapsulation and wherein the radially inner support structure rests radially on the inside on the encapsulation.

12 . The stator unit according to claim 11 ,
wherein the encapsulation has laying channel which extends in the circumferential direction radially on the inside for receiving a wire which forms the windings, and whose wall, which extends in the circumferential direction, forms a bearing surface in the axial direction for supporting the radially inner support structure, and/or wherein radially on the inside, the encapsulation forms webs extending radially outwards, which webs each form a further bearing surface in the axial direction for supporting the radially inner support structure.

13 . A system consisting of one type of printed circuit board and a plurality of types of switching disks according to claim 1 , wherein the type of printed circuit board has contacts for contacting the types of switching disks on a first pitch circle having a first diameter, wherein the types of switching disks each have the printed circuit board contacts for contacting the contacts of the printed circuit board on the first pitch circle and the winding contacts for contacting the windings on a second pitch circle which has a second diameter which is different from type to type of switching disks, in particular different from the first diameter.

Assignees

• Ebm Papst Mulfingen Gmbh & Co Kg

Inventors

• Walter Manuel
• Letter Tobias
• Schmidt Madlene

Classifications

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H01R12/55

  characterised by the terminals · CPC title

• H02K3/50

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• H02K3/522 Primary

  for generally annular cores with salient poles · CPC title