Motorised hub for a motor vehicle with an electric drive

Abstract

The invention relates in particular to a motorised hub (1) for a motor vehicle with an electric drive, said motorised hub comprising a hub (9) intended to accommodate a wheel (2), the hub being rotationally mounted with respect to a hub carrier (7) about a hub axis (A), the motorised hub comprising an electric drive machine (3), the electric machine comprising an outer stator (32), which is secured to the hub carrier, and an inner rotor (31) of which the axis of rotation is remote from the hub axis and parallel to said hub axis, the motorised hub comprising reduction means (6) acting between the rotor of the electric machine and the hub, the motorised hub additionally comprising friction braking means, the braking rotor (5) being secured to the hub and arranged axially on the inner side of the vehicle with respect to the reduction means, the shaft of the rotor (31) of the electric machine being placed radially outside the braking rotor and extending axially from the reduction means towards the inside of the vehicle.

Description

field of invention [0001] The present invention relates to the ground connection of electric traction motor vehicles, and in particular to their electric wheels. Background technique [0002] In this field, many proposals are known, for example the following documents EP 0878332, WO 2006 / 032669, US 2007 / 0257570 and WO 2007 / 083209. [0003] In this application, the term "electric hub" is used to refer to a mechanical assembly comprising a hub, a hub carrier, a system for guiding the hub relative to the hub carrier, an electric motor and a hub brake. Electric hubs are thus used to receive, on the one hand, wheels equipped with eg tyres, and on the other hand, to carry the vehicle, generally via a suspension arrangement. In this application, the term "electric wheel" is also used to denote a mechanical assembly comprising an electric hub and a corresponding wheel as defined above. [0004] One of the difficulties in using such electric hubs on mass-produced vehicles is the ba...

AI Technical Summary

Problems solved by technology

[0004] One of the difficulties in using such electric hubs on mass-produced vehicles is the backward compatibility with the manufacturers' adopted and proven solutions for the manufacture of some components such as the suspension system and the wheels

Another difficulty is to obtain a compact and simple system that is as light as possible, at a cost acceptable to the motor vehicle industry

[0005] In particular, the integration of electric motors into the wheels is particularly desirable, since with electric traction it is often necessary to carry batteries to store electrical energy, making it necessary to contribute to the battery onboard the vehicle even with the best performing technologies known to date Enough space, unless the range of electric vehicles is greatly reduced

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