Rotary electrical machine, especially a motor vehicle alternator, having improved elastic mounting means for its stator

Claim 1

A rotary electrical machine comprising: a casing defining an axis of rotation and a rotor chamber within the casing, the casing having two casing parts and further defining a common junction plane perpendicular to the axis of rotation, with the casing parts being brought together at the common junction plane; fastening means for securing the casing parts together; and a generally cylindrical and annular stator, disposed within the casing and defining opposed radial and annular end surfaces of the stator, each casing part defining a radial support surface, the radial support surfaces being spaced apart axially in facing relationship to each other with the stator lying between the support surfaces, the machine further having a plurality of elastically deformable elements having a cushion block portion thereof interposed in axial compression between one of the support surfaces and the end surface of the stator facing towards that support surface, whereby means are provided for clamping the stator between the support surfaces, wherein one of the casing parts defines a pitch circle, and the elastically deformable elements in the form of cushion members spaced apart along the pitch circle each having an aperture formed therein for receiving the respective means for clamping the stator, with each cushion member cushion block portion being in axial compression between the corresponding end surface of the stator and a portion of the support surface of that casing part, wherein each cushion member block is formed of elastically deformable material, the cushion member having two opposed and parallel engagement surfaces, one of which engages against the stator end face, with the other one engaging against the support surface portion of the casing.