Mechanically fixing circuit boards in a motor

Patent metadata

Field	Value
Publication number	US-12489337-B2
Application number	US-202318337893-A
Country	US
Kind code	B2
Filing date	Jun 20, 2023
Priority date	Jun 22, 2022
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

An apparatus for fixing a printed circuit board within a housing of an electric motor, comprising a first housing part, a second housing part, and an insulation part. The insulation part is arranged between the first housing part and the second housing part, such that the housing parts are spaced apart from one another at least in certain portions by the insulation part, including a hard component part and a soft component part. The insulation part comprises at least one spring element for exerting a pressing force on the first housing part. The hard component part comprises at least one hold-down means, having at least one pressure-exerting element. The soft component part is configured to provide a seal between the housing parts. The spring element is arranged on that side of the insulation part which lies opposite to a stop region in the direction of the holding force.

First claim

The invention claimed is:

1 . An apparatus for fixing a printed circuit board within a housing of an electric motor, comprising
a first housing part, a second housing part, and an insulation part,
wherein the insulation part is arranged between the first housing part and the second housing part, such that the housing parts are spaced apart from one another at least in certain portions by means of the insulation part,
wherein the insulation part comprises a hard component part and a soft component part,
wherein the insulation part comprises at least one spring element for exerting a pressing force on the first housing part,
wherein the hard component part comprises at least one hold-down means,
wherein the hold-down means has at least one pressure-exerting element, for exerting a holding force on the printed circuit board,

wherein the soft component part is configured to provide a seal between the housing parts,

wherein, in the region of the hold-down means, the spring element is arranged on that side of the insulation part which lies opposite to a stop region in the direction of the holding force.

2 . The apparatus according to claim 1 , wherein the spring element is configured as a thickening of the soft component part, wherein the spring force of the spring element is formed in dependence on the geometry of the spring element.

3 . The apparatus according to claim 1 , wherein the soft component part is at least partially configured as a sealing element.

4 . The apparatus according to claim 3 , wherein the sealing element comprises a sealing lip.

5 . The apparatus according to claim 1 , wherein a pressing force of the first housing part and of the second housing part, said pressing force acting on the sealing element in the mounted state, is decoupled, by means of the soft component part, from a holding force of the pressure-exerting element, said holding force acting on the printed circuit board in the mounted state.

6 . The apparatus according to claim 1 , wherein the stop region is at least partially configured on the hold-down means.

7 . The apparatus according to claim 6 , wherein the stop region is at least partially configured for axially fixing the printed circuit board.

8 . The apparatus according to claim 1 , wherein the hold-down means has a guide region.

9 . The apparatus according to claim 8 , wherein the guide region comprises a protrusion or web.

10 . The apparatus according to claim 1 , wherein the soft component part, together with the hard component part of the insulation part, is at least in certain portions configured as an integral component.

11 . The apparatus according to claim 10 , wherein the integral component comprises a two-component injection-molded part.

12 . The apparatus according to claim 1 , wherein the hold-down means is configured in a materially integral manner on the hard component part.

13 . The apparatus according to claim 12 , wherein the hold-down means is configured as a resilient region of the hard component part.

14 . The apparatus according to claim 1 , wherein the insulation part is at least partially formed from an electrically or thermally insulating material.

15 . The apparatus according to claim 14 , wherein the insulation part is at least partially formed from a plastic material.

16 . The apparatus according to claim 1 , wherein the second housing part is configured as a stator of the motor or is able to accommodate a stator of the motor in an interior space.

17 . The apparatus according to claim 1 , wherein the holding force on the printed circuit board corresponds, in terms of its direction of action, to a force acting in an axial direction of the motor.

Assignees

• Ebm Papst Mulfingen Gmbh & Co Kg

Inventors

• Walter Manuel
• Letter Tobias

Classifications

• H05K7/205

  Heat-dissipating body thermally connected to heat generating element via thermal paths through printed circuit board [PCB] (details of PCBs relating to heat transfer H05K1/0201) · CPC title

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• H05K5/006

  characterized by features for holding the PCB within the housing · CPC title

• H02K5/10

  with arrangements for protection from ingress, e.g. water or fingers · CPC title