Method of making a cooling fan rotor for a rotating electrical machine in particular for an alternator for an automotive vehicle
AssigneeValeo Equipements Electriques Moteur
InventorMichel Galliet
Life of this patent
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Abstract
A cooling fan rotor for a rotating electrical machine such as an alternator for an automotive vehicle, has n ventilating blades. The rotor is made by a method including the following steps: an elongated metal strip is formed; the metal strip is formed with 2n surface portions comprising first surface portions and second surface portions, each of generally quadrilateral shape; and the second quadrilateral surface portions are bent over on themselves successively or simultaneously, each about its median line, which is the line bisecting the angle defined by the sides of the said surface portion.
Claims10
A method of making a cooling fan rotor having n cooling blades for a rotary electrical machine, including the steps of:
- forming an elongated metal strip (10);
- forming the said metal strip with 2 n generally quadrilateral surface portions (11), comprising n first surface portions alternating with n second surface portions (12), each second surface portion being defined between two sides thereof in the form of boundary lines extending across the strip and inclined to each other by a first angle, the said first angle defining a median line of the corresponding second surface portion bisecting the first angle;
- and
- successively or simultaneously, bending each said second surface portion over on itself about its said median line (13).
A cooling fan rotor having n cooling blades formed by a method according to any one of the preceding claims.
Dependencies are inferred from the claim text.