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Gear motors for motor vehicle wiper systems

A technology of geared motors and motor vehicles, which is applied in the direction of vehicle cleaning, vehicle maintenance, gear transmission, etc.

Active Publication Date: 2021-11-12
VALEO SYST DESSUYAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors have observed that when the aim is to limit the overall size of the electric motor in the axial direction, there are motors of the above-mentioned type that generate axial force by locking a ball bearing arranged in an intermediate position between the worm and the electric motor. device may be disadvantageous

Method used

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  • Gear motors for motor vehicle wiper systems
  • Gear motors for motor vehicle wiper systems
  • Gear motors for motor vehicle wiper systems

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Embodiment Construction

[0046] Accordingly, the invention relates to a geared motor 1 for a wiper system of a motor vehicle, comprising:

[0047] - an electric motor 2 comprising:

[0048] - a rotor 20 comprising magnetic elements,

[0049] - a stator 21 comprising windings for electromagnetic excitation of the rotor,

[0050] - a rotating shaft 22 fastened to the rotor,

[0051] - a reduction gear mechanism 3 connecting the shaft 22 with the output shaft of the gear motor,

[0052] - A casing forming a protective enclosure for the reduction gear mechanism 3 and possibly even said electric motor 2 .

[0053] The electric motor 2 may be a DC type with brushes or a DC type without brushes. In the latter case (ie a brushless motor), such a geared motor comprises means for determining the angular position of the rotor 20 relative to the stator 21 . A controller (not shown) is configured to generate control signals to power the electromagnetically excited windings of the stator 21 in dependence on th...

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PUM

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Abstract

The invention relates to a gear motor (1) for a wiper system of a motor vehicle, comprising: an electric motor (2) comprising a rotor (20) and a shaft (22) fixed to the rotor; a reduction gear Mechanism (3) comprising a worm / worm gear system; means for generating an axial load for compensating the axial play of the shaft (22), the means being included in said shaft (22) Retaining wedges (6) installed in a sliding manner in the radial direction, said retaining wedges (6) exert an axial load on the outer race of the ball bearing (5), which is used to guide the shaft. According to the invention, said retaining wedge (6) is arranged in the middle position between the seat (40) of the bearing support (4) and the worm (30), next to the worm wheel (31), by retaining wedge The insert (6) exerts said axial load (Fa) on the outer race (51) of the ball bearing (5) in a direction away from the worm (30).

Description

technical field [0001] The invention relates to a gear motor for a motor vehicle wiper system. Background technique [0002] A gear motor is mainly composed of an electric motor coupled with a reduction gear mechanism, which is responsible for reducing the speed of the electric motor to obtain high rotational transmission torque. [0003] Various types of electric motors can be used in gear motors, especially brushless direct current (DC) electric motors, which have many advantages such as long service life, small overall size, low energy consumption and low sound level. [0004] A gear motor of the type described above finds particular application in a motor vehicle wiper system comprising one or more wiper blades and for driving the one or more wiper blades to perform A reciprocating linkage, said output shaft of the gear motor drives the linkage of the wiper system. [0005] The reduction gear mechanism may be a worm / worm gear combination, the worm being fastened to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C35/067F16B21/10B60S1/08B60S1/16F16H1/16F16C19/06H02K5/173H02K7/08H02K7/116
CPCF16C2226/70B60S1/166F16C35/067F16H1/16F16C19/06H02K5/1735H02K7/081H02K7/1166F16C2380/27F16C2361/61B60S1/26F16H2057/0213
Inventor 约瑟-路易斯·赫拉达
Owner VALEO SYST DESSUYAGE