CPC H02K 5/10 (2013.01) [F16B 21/071 (2013.01); H02K 1/243 (2013.01); H02K 7/1815 (2013.01)] | 13 Claims |
1. A rotary electrical machine for a motor vehicle, the machine comprising:
a casing;
an electronic assembly fitted on the casing;
a protective cover positioned around the electronic assembly; and
a screw which extends along an axis, and permits the securing of the cover on the casing and/or the electronic assembly;
wherein the protective cover comprises at least one opening forming a fixing area in which there extends at least one tongue delimiting a central opening for the passage of the screw,
wherein the at least one tongue comprises a planar end surface oriented generally perpendicular to the screw axis, the screw comprising a screw head at its upper end and threaded shank at its lower end, wherein the screw includes a tapered portion at its uppermost end, an annular retention groove adjacent the tapered portion, and a hexagonal shaped grasping portion, the grasping portion and the tapered portion having diameters larger than that of the annular retention groove,
wherein the annular retention groove is located between the tapered portion and the grasping portion, a lower end of the tapered portion defines an undercut which forms a generally planar upper end surface of the annular retention groove for latching engagement with a corresponding end surface of the at least one tongue, and
wherein the screw head and the opening in the protective cover have complementary frusto-conical forms.
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