Stator body for an axial flux electric machine
View Patent ↗A stator body for an axial-flux electric machine includes: a plate in the form of a ring centered on a longitudinal axis, the plate including an upper face and at least one upper relief projecting from the upper face; and teeth, at least one of which includes a lower relief, a first side of which has a shape complementary to that of a portion of the upper relief, the upper relief being interlocked with the lower relief. The body includes a locking element extending opposite the upper face of the plate and interposed between the tooth and the plate so as to immobilize the upper relief in the position interlocked with the lower relief, and blocking unit blocking the position of the locking element with respect to the plate.
1 . A stator body for an axial-flux electric machine comprising:
a ring-shaped plate centered on a longitudinal axis, the ring-shaped plate comprising an upper face and at least one upper relief projecting from the upper face;
teeth at least one of which comprises a lower relief a first side of which has a shape complementary to that of a portion of the upper relief, the upper relief being interlocked with the lower relief; wherein the body comprises a locking element extending opposite the upper face of the ring-shaped plate and interposed between the tooth and the ring-shaped plate so as to immobilize the upper relief in an interlocked position with the lower relief and wherein the body comprises blocking means blocking the position of the locking element with respect to the ring-shaped plate,
wherein the locking element comprises a notch in which the upper relief and the lower relief are located, the notch having a lateral edge forming, together with the lower relief and the upper relief, a dovetail assembly wherein the lower relief forms a tenon and wherein the lateral edge of the notch and the upper relief form a mortise.
2 . The stator body according to claim 1 , wherein the locking element is designed, before assembly, to pivot relative to the ring-shaped plate between a released position in which the tooth is movable relative to the ring-shaped plate and a blocking position in which the locking element immobilizes the upper relief by holding the upper relief interlocked with the lower relief, the blocking means being adapted to hold the locking element in the blocking position.
3 . The stator body according to claim 1 , wherein the blocking means comprise at least one amongst the following elements:
a screw;
a snap-fit device.
4 . The stator body according to claim 1 , wherein the upper relief comprises an upper rib and wherein the lower relief comprises a lower rib.
5 . The stator body according to claim 4 , wherein each of the upper rib and the lower rib has a uniform profile according to a radial direction perpendicular to the longitudinal axis.
6 . The stator body according to claim 4 , wherein the upper relief has a main surface directed towards the ring-shaped plate and wherein the lower relief has a first surface directed towards the tooth, the main surface being in contact with the first surface.
7 . The stator body according to claim 1 , wherein the body comprises a wall rising from a peripheral edge of the ring-shaped plate, on the side of the ring-shaped plate's upper face, the wall having a groove a portion of which extends lengthwise according to an axis orthogonal to the longitudinal axis, the locking element having a peripheral relief which is inserted into the portion of the groove.
8 . A stator comprising a stator body according to claim 1 and conductive wire windings carried by the teeth.
9 . A method for assembling a stator body according to claim 1 , comprising the following steps of:
positioning the locking element on the upper face of the ring-shaped plate;
positioning the tooth so that the upper relief interlocks with the lower relief;
moving the locking element relative to the ring-shaped plate;
blocking the locking element with respect to the ring-shaped plate by means of the blocking means.
10 . The method according to claim 9 , wherein the locking element pivots relative to the ring-shaped plate between a released position in which the tooth is movable relative to the ring-shaped plate and a blocking position in which the locking element immobilizes the upper relief by holding the upper relief interlocked with the lower relief, the blocking means being adapted to hold the locking element in the blocking position.