Assembly for a motor vehicle blower

Patent metadata

Field	Value
Publication number	US-12051961-B2
Application number	US-201917285332-A
Country	US
Kind code	B2
Filing date	Oct 16, 2019
Priority date	Oct 17, 2018
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

The invention relates to an assembly for an electric motor, comprising a motor support (2), a brush (5) and a device for moving (7, 10) the brush (5), the device comprising an arm (7) rigidly connected to the brush (5) and a pivot connector (10) between the support (2) and the arm (7), characterised in that the pivot connector (10) is made from an elastomeric material so as to exert a restoring force on the arm (7).

First claim

The invention claimed is:

1. An assembly for an electric motor, comprising:
a motor support;
a brush; and
a movement device for moving the brush, the movement device comprising an arm secured to the brush and a pivot connection element between the motor support and the arm,
wherein the pivot connection element is made from an elastomer material so as to exert a return force on the arm,
wherein the pivot connection element comprises an interface region that interfaces with the arm, an interface region that interfaces with the motor support and a narrowed region of material disposed between both interface regions.

2. The assembly as claimed in claim 1 , wherein the narrowed region has a continuous narrowing of material between the two interface regions.

3. The assembly as claimed in claim 1 , wherein the interface region that interfaces with the arm comprises a captive-retention part shaped so as to be inserted into an associated orifice of the arm, a baseplate shaped so as to bear against the arm and a part called an intermediate part between the baseplate and the narrowed region.

4. The assembly as claimed in claim 1 , wherein the interface region that interfaces with the motor support comprises a captive-retention part shaped so as to be inserted into an associated orifice of the motor support, a baseplate shaped so as to bear against the motor support and a part called an intermediate part between the baseplate and the narrowed region.

5. The assembly as claimed in claim 1 , wherein the elastomer material is a polymer with a Shore A hardness of between 70 and 90.

6. The assembly as claimed in claim 1 , wherein the pivot connection element is shaped such that, when the assembly is associated with an electric motor comprising a commutator, the return force exerted on the arm moves the arm in a direction in which it moves closer to the commutator.

7. The assembly as claimed in claim 1 , wherein the pivot connection element is captively retained on the motor support and/or on the arm.

8. A blower for a heating, ventilation and/or air conditioning device for a motor vehicle, comprising:
an electric motor provided with a commutator and an assembly, the assembly comprising:
a motor support,
a brush, and
a movement device for moving the brush, comprising an arm secured to the brush and a pivot connection element between the motor support and the arm,
wherein the pivot connection element is made from an elastomer material so as to exert a return force on the arm,
wherein the pivot connection element comprises an interface region that interfaces with the arm, an interface region that interfaces with the motor support and a narrowed region of material disposed between both interface regions,

the assembly being shaped such that the brush is pressed against the commutator during operation of the blower.

9. The blower as claimed in claim 8 , wherein the assembly further comprises two brushes and a movement device associated with each brush, each movement device being secured to the motor support, and wherein the motor support has an annular shape, a first movement device being diametrically opposite a second movement device, and each pivot connection element being shaped so that, in a rest position, the associated arm extends along a radius of the motor support.

Assignees

• Valeo Systemes Thermiques

Inventors

• Franco Ismaël

Classifications

• H01R39/381

  characterised by the application of pressure to brush · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• B60H1/00457

  Ventilation unit, e.g. combined with a radiator (control systems for ventilators B60H1/00828) · CPC title

• H02K5/146 Primary

  Pivotally supported brushes or brush holders · CPC title