Electric motor with electronic commutation of complex structure

Claim 1

A motor with electronic commutation, comprising: a casing (10) with a body (11); flanges (12) having an internal face and adapted to receive at least one bearing (13); a shaft (20) mounted in the bearing; an armature (30) carrying windings (32) of wires (320) having ends (321); commutation means (40) with a connector (41) constituted by an insulating support (410) adapted to be carried by the armature (30); a printed circuit (421) for receiving components; and conducting contactors (411) equipped with terminals (412) in order to receive said wire ends (321), with contacts (413) adapted to make contact with respective ones of corresponding counter-contacts (413') of said printed circuit (421) and with a control module (42) made of an insulating substrate (420) which carries said printed circuit (421) for receiving components including those that are power components of electronic circuits (422), and which is directly applied and held in intimate contact against said internal face of a flange (12), and in which said insulating support (410) is mounted on said shaft (20), said insulating support (410) and said shaft (20) being provided with a polarising slot (60) which allows only a single orientation in rotation and fixes the latter and which also ensures the relative orientation in rotation of said contacts (413) and counter-contacts (413') while permitting a relative axial sliding of said insulating support (410) and said shaft (20), where this relative axial sliding is possible, at least until an end of an operation of fixing the wire ends (321) to the terminals (412); and wherein said insulating support (410) carries at its periphery (4101) a median ring (4102) edged on either side with lateral borders (4103) of lesser diameter; wherein said ring (4102) is provided with teeth (4104) whose profile (4106), at least close to a bottom (4107) of each space width (4108) which separates them, exhibits a recessed portion (4105); wherein each of said borders (4103) is provided with notches (4109) disposed in vertical line with said teeth (4104); wherein said terminals (412) and said contacts (413) are joined together by central rungs (415) with two wings (416) which are each adapted to be engaged into the space widths (4107) in such a manner that each of said wings (416) can be applied against a recessed portion (4105); and wherein each rung (415) carries two marginal small bars (417) which are each adapted to be engaged into the notches (4109).