Arrangement comprising a stator tooth and a stator coil support for a motor of an electric motor vehicle

Abstract

The invention relates to an arrangement (10) for a motor (1) of an electric vehicle, which arrangement comprises: - a tooth (31) of a stator (3), a first face (311) of the tooth being parallel to a radial plane of the stator (3); and - a stator coil support (4) comprising a recess (41) into which the stator tooth is inserted, the stator forming an inner cylinder, the first face of the tooth comprising a depression (3111) of which a depth is measured in a direction perpendicular to the first face, and, when the tooth is arranged in the recess of the coil support, the depression cooperates with a protrusion (4111) of a second face (411) of the recess arranged facing the first face, so as to prevent the support from moving relative to the tooth.

Description

Description Title of the invention: Arrangement comprising a stator tooth and a stator coil support of a motor of an electric motor vehicle.

[0001] The invention relates to an arrangement comprising a stator tooth and a stator coil support of a motor of an electric motor vehicle. The invention also relates to a stator equipped with an arrangement according to the invention. The invention further relates to a motor vehicle equipped with such a stator or such an arrangement.

[0002] Rotating electrical machines are very efficient. However, the manufacturing process for such machines requires overcoming significant challenges. In particular, existing devices and methods for installing wire coil holders around the teeth of a stator have drawbacks.

[0003] The aim of the invention is to provide an arrangement comprising a stator tooth and a stator coil support which overcomes the above drawbacks and improves the arrangements comprising a stator tooth and a stator coil support known from the prior art. In particular, the invention makes it possible to provide an arrangement comprising a stator tooth and a stator coil support which is simple and reliable and which prevents movements of the coil support of the arrangement relative to the tooth of the arrangement.

[0004] To this end, the invention relates to an arrangement for a motor of an electric motor vehicle comprising - a tooth of a stator of the electric motor vehicle, a first face, mainly flat, of the tooth being parallel to a radial plane of the stator, and - a stator coil support comprising a housing into which the stator tooth is inserted, the stator substantially forming an inner cylinder of given axis. The first face of the tooth comprises a hollow relief, the depth of which is measured in a direction perpendicular to the first face, and when the tooth is arranged in the housing of the coil support, the hollow relief collaborates with a protruding relief of a second face of the housing arranged opposite the first face, so as to prevent movement of the support relative to the tooth.

[0005] In one embodiment, a dimension of the hollow relief measured along a radius of the stator is strictly less than a dimension of the tooth measured along a radius of the stator or, a dimension of the hollow relief measured along a radius of the stator is equal to a tooth dimension measured along a radius of the stator; further, a dimension of the protruding relief measured along a radius of the stator is less than or equal to the dimension of the hollow relief measured along a radius of the stator.

[0006] In one embodiment, - a section, along a plane perpendicular to the second face, of the projecting relief is in the shape of an arc of a circle or in the shape of an acute angle, and / or - the protruding relief forms at least two segments each extending mainly along a radius of the stator and the at least two segments being arranged at different heights measured along the given axis, and / or - a height measured along the given axis of a point located in a median zone of the salient relief is greater than a height measured along the given axis of a point located outside the median zone.

[0007] In one embodiment, a dimension of the tooth measured along a radius of the stator is strictly less than a dimension of the housing measured along a radius of the stator, the support being arranged in abutment against the tooth along a radial direction of the stator so as to create a free space between the support and the tooth, and the arrangement comprising a shim inserted into the free space.

[0008] In one embodiment, one face of the shim is provided with a raised area capable of collaborating with the tooth or the housing to fix a position of the shim relative to the housing and / or relative to the tooth, and / or the shim is made of a plastic and / or metallic material.

[0009] In one embodiment, a first section of the tooth, along a plane perpendicular to the given axis, is substantially in the shape of a first trapezium, and a second section of the housing of the coil support along a plane perpendicular to the given axis is substantially in the shape of a second trapezium. Moreover, - the tooth comprises a first locking device arranged on a large base of the first trapezium capable of collaborating with a second locking device arranged on a large base of the second trapezium and / or - the tooth comprises a third locking device arranged on a small base of the first trapezium capable of collaborating with a fourth locking device arranged on a small base of the second trapezium.

[0010] In one embodiment, a crest is arranged along the given axis on at least one base of the trapezium formed by the housing, the crest participating in the mounting and / or holding of the support on the tooth.

[0011] In one embodiment, a surface of the stator coil support for receiving a winding of an electrical wire is flexible, including walls of the housing are capable of deforming towards the inside or outside of the housing.

[0012] The invention further relates to a stator for an electric motor of a motor vehicle comprising an arrangement according to the invention.

[0013] The invention further relates to a motor vehicle comprising a stator according to the preceding invention or an arrangement according to the invention.

[0014] The invention further relates to a method of mounting an arrangement according to the invention comprising a first step of inserting, along the given axis, the coil support of the arrangement onto the tooth of the arrangement so as to place the projecting relief of the coil support opposite or inside the hollow relief of the tooth of the arrangement.

[0015] In one embodiment, the method comprises, following the first step: - a second step of sliding the support on the tooth in a radial direction of the stator oriented towards the outside of the stator, - and optionally a third step of inserting the arrangement wedge into the free space created during execution of the second step.

[0016] In one embodiment, the method further comprises a fourth step of locking the stator coil holder onto the tooth and / or a fifth step of deforming the stator coil holder.

[0017] In one embodiment, the deforming step is performed simultaneously with at least one of the first, second, third or fourth steps.

[0018] Other details, characteristics and advantages will emerge more clearly on reading the detailed description given below, for informational and non-limiting purposes, in relation to the various examples of embodiment illustrated in the following figures:

[0019] [Fig.l] schematically represents a motor vehicle equipped with an arrangement according to the invention.

[0020] [Fig.2] shows several stator teeth of an arrangement according to one embodiment of the invention.

[0021] [Fig.3] shows a coil holder of an arrangement according to one embodiment of the invention.

[0022] [Fig.4] is a first representation of an arrangement according to the invention.

[0023] [Fig.5] illustrates a deformation of a housing of a coil holder of an arrangement according to the invention.

[0024] [Fig.6] is a sectional view of an arrangement according to the invention.

[0025] [Fig.7] illustrates different embodiments of a coil holder of an arrangement according to the invention.

[0026] [Fig.8] illustrates an embodiment of an arrangement according to the invention comprising a wedge and a locking device.

[0027] [Fig.9] illustrates an embodiment of an arrangement according to the invention comprising a tooth equipped with a hollow relief in the shape of an arc of a circle.

[0028] [Fig.10] illustrates a step of deformation of a coil support of an arrangement according to the invention.

[0029] [Fig.11] illustrates a second step of sliding the arrangement holder onto the arrangement tooth and a third step of inserting a shim into the arrangement.

[0030] [Fig.12] is a perspective view of the arrangement at a first instant given before the second sliding step.

[0031] [Fig.13] is a perspective view of the arrangement at a second instant after the second sliding step.

[0032] [Fig.14] illustrates different embodiments of a hollow relief of a tooth of an arrangement according to the invention.

[0033] An embodiment of a motor vehicle 100 is described below with reference to [Fig.l]. The motor vehicle 100 may be an electric or hybrid motor vehicle. In addition, the motor vehicle 100 may be a private vehicle, a utility vehicle or a vehicle dedicated to public transport.

[0034] The motor vehicle 100 is equipped with an electric motor 1, of the rotary electric machine type, comprising at least one rotor 2 and a stator 3 according to the invention equipped with at least one arrangement 10 according to the invention.

[0035] The stator 3 according to the invention can be made of rolled steel and / or sintered soft magnetic composite material.

[0036] In the embodiment presented in this document, and illustrated by [Fig.2], the stator 3 is in the form of a crown, an inner face of the crown formed by the stator 3 being located in a cylinder of axis X called the first axis X.

[0037] The crown comprises a plurality of teeth 31 according to the invention. Each tooth 31 of the stator 3 has the shape of an angular section of the crown.

[0038] The shape of a tooth 31 is substantially trapezoidal. A tooth 31 has two substantially flat, non-parallel faces called “lateral faces”, each lateral face being located in a radial plane of the crown, that is to say a plane containing the first axis X.

[0039] Each tooth of the stator 3 is intended to be placed in a housing of a stator coil, in particular illustrated by figures 3 and 4. Thus, in a mounted configuration, more specifically represented by [Fig.4], each tooth 31 of the stator 3 is surrounded by a coil support 4 according to the invention. Each coil support 4 receives a winding 32 of conductive wire, and a circulation of current in the winding 32 generates an electromagnetic field.

[0040] A 4 spool holder includes: - a housing 41 intended to receive a stator tooth 31, the housing 41 passing through support 4 along the first X axis, - a main surface 5 intended to receive a winding 32 of an electric wire, the winding 32 being carried out around the first axis X.

[0041] Optionally, the coil support 4 is made, in whole or in part, of a material making it possible to insulate the windings 32 from an electromagnetic field generated by the stator 3. Thus, advantageously the support can be insulating. Said material can be - plastic, for example Polyphthalamide (PPA) or Polyphenylene sulfide (PPS), - plastic containing a magnetically and electrically non-conductive filler, in particular fiberglass and / or a mineral filler. These solutions can be combined with magnetically conductive load zones (including for example iron powder, fiber, mesh, etc.) and / or with magnetically conductive parts, such as soft magnetic composite (SMC) bars.

[0042] The main surface 5 of the coil support intended to receive a winding of an electric wire is advantageously flexible, in particular the walls of the housing 41 can be deformed towards the inside or the outside of the coil support 4.

[0043] In addition, the flexibility of the coil support 4 makes it possible to absorb irregularities present at the surfaces of the teeth 31. As illustrated by [Fig.5], the stator 3 is produced by rolling and the rolling layers create an irregular surface, which generates an irregularity of the surface of the teeth 31. Advantageously, the irregularities are gradually absorbed by deformation or wear of the surface of a coil support housing 41 arranged in contact with the surfaces of the tooth.

[0044] In the remainder of the document, tooth 31 of stator 3 is referred to as “tooth 31” and coil support 4 is referred to as “support 4”.

[0045] With reference to figures 2 to 8, in the remainder of the document an arrangement 10 according to the invention is described comprising a tooth 31 equipped with a support 4, a first face 311 of the tooth 31 being arranged opposite a second face 411 of the housing 4L. The first face 311 is mainly flat.

[0046] In the rest of the document, we describe the arrangements made on the first face 311 with reference to a direct orthonormal reference frame RI defined by - the first axis X of the inner cylinder formed by the stator 3, - a second Y axis defined by a radius of the X axis cylinder, the radius being contained in the first face 311, - a third Z axis defined so as to form a direct orthonormal reference frame with the first X axis and the second Y axis.

[0047] In the arrangement 10 according to the invention, the second face 411 is placed opposite of the first face 311. The second face 411 is mainly flat, and it extends along a plane substantially coincident with the first face 311 of the tooth 31. In the remainder of the document, the arrangements made on the second face 411 are also described with reference to the direct orthonormal reference frame RI.

[0048] Thus, an arrangement 10 according to the invention, illustrated in particular by [Fig.6], comprises - a tooth 31 of a stator 3 of a motor vehicle, a first face 311, mainly flat, of the tooth 3 being parallel to a radial plane of the stator 3, in particular in a plane (X, Y), and - a stator coil support 4 comprising a housing 41 in which the tooth 31 of the stator 3 is inserted, the first face 311 of the tooth 31 comprising a hollow relief 3111 whose depth is measured in a direction perpendicular to the first face 311, in particular in the third direction Z, and the hollow relief 3111 collaborating with a projecting relief 4111 of the second face 411 of the housing 41 arranged opposite the first face 311, so as to prevent movement of the support 4 relative to the tooth 3.

[0049] In one embodiment, the first face 311 may be located in a radial plane of the stator 3.

[0050] The expression "first face mainly planar" means that the surface of the first face comprises at least one planar area, F at least one planar area covering almost completely the first face, in particular F at least one planar area covering at least 50% of the first face, or even at least 60% of the first face, or even at least 70% of the first face, or even at least 80% of the first face, or even at least 90% of the first face.

[0051] In one embodiment, - a dimension of the hollow relief 3111 measured along a radius of the stator 3, that is to say along the second direction Y, is strictly less than a dimension of the tooth 31 measured along the second direction Y, or - a dimension of the hollow relief 3111 measured along the second direction Y is equal to a dimension of the tooth measured along the second direction Y.

[0052] In other words, in one embodiment, the hollow relief 3111 is only present on a portion of the first face 311. Alternatively, the hollow relief 3111 is present over the entire length of the first face 311, the length being measured along the second direction Y.

[0053] Advantageously, a dimension of the protruding relief 4111 measured along a radius of the stator 3 is less than or equal to the dimension of the hollow relief 3111 measured along a radius of the stator 3. In other words, when the hollow relief is only present on a part of the first face 311, then the protruding relief 4111 is arranged so as to extend over a given zone 4112 of the second face 411 located opposite the hollow relief 3111 of the first face 311, a dimension along the second direction Y of the given area 4112 being less than one dimension along the second direction Y of the hollow relief 3111.

[0054] Additionally or alternatively, a section along a plane (Y, Z), of the salient relief 4111 is in the shape of an arc of a circle or in the shape of an acute angle.

[0055] Additionally or alternatively, the projecting relief 4111 forms at least two segments 418, 419 each extending mainly in the second direction Y, and the at least two segments being arranged respectively at different heights measured in the first direction X.

[0056] Additionally or alternatively, the hollow relief 3111 forms at least two segments 416, 417 each extending mainly in the second direction Y, and the at least two segments being arranged respectively at different heights measured in the first direction X.

[0057] In addition or alternatively, a height, measured along the first direction X, of a point located in a median zone 415 of the projecting relief 4111 is greater than a height, measured along the first direction X, of a point located outside the median zone 415. The expression “median zone of the projecting relief 4111” designates a portion 415 of the projecting relief 4111 comprising a point located substantially in the middle of the projecting relief 4111, the middle of the projecting relief being determined relative to the second direction Y.

[0058] In a non-limiting manner, [Fig. 7] represents different embodiments 51, 52, 53, 54, 55, 56 of a projecting relief 4111 arranged on the second face 411.

[0059] In a first embodiment 51, the protruding relief 4111 is a ridge extending over the entire length of the second face 411.

[0060] In a second embodiment 52, the protruding relief 4111 is a ridge extending over almost the entire length of the second face 411, without reaching the ends of the second face 411.

[0061] In a third embodiment 53, the protruding relief 4111 is present only at the ends of the second face 411.

[0062] In a fourth embodiment 54, a first end of the projecting relief 4111 located near a small base of a trapezium formed by the housing 41 is higher than a second end of the projecting relief 4111 located near a large base of the trapezium formed by the housing 41. As a result, a pressure directed in a direction opposite to the X axis exerted on the first end of the projecting relief is greater than a pressure exerted in a direction opposite to the X axis on the second end of the projecting relief.

[0063] A fifth embodiment 55 is a variation of the fourth embodiment 54 in which a locking key 4122 is further disposed on the small base of the cylinder formed by the housing.

[0064] In a sixth embodiment 56, the second end of the projecting relief 4111 located near the large base of the trapezium formed by the housing 41 is higher than the first end of the projecting relief 4111 located near the small base of the trapezium formed by the housing 41. As a result, a pressure directed in a direction opposite to the X axis exerted on the second end of the projecting relief is greater than a pressure exerted in a direction opposite to the X axis on the first end of the projecting relief.

[0065] In one embodiment of the arrangement 10, a first section of the tooth 31 along a plane (Y, Z) is substantially in the shape of a first trapezium 312, and a second section of the housing 41 along a plane (Y, Z) is substantially in the shape of a second trapezium 412, and - the tooth comprises a first locking device 313 arranged on a large base 3121 of the first trapezium 312 capable of collaborating with a second locking device 413 arranged on a large base 4121 of the second trapezium 412, and / or - the tooth comprises a third locking device 314 arranged on a small base 3122 of the first trapezium 312 capable of collaborating with a fourth locking device 414 arranged on a small base 412 of the second trapezium 412.

[0066] In the remainder of the document, the term "lock key" is also used to refer to a locking device.

[0067] The locking devices may be arranged on the larger bases of the trapezoids formed by the tooth and / or formed by the coil support housing. In addition or alternatively, the locking devices could be arranged on the smaller bases of the trapezoids.

[0068] Furthermore, as illustrated by [Fig.7], a ridge 4122 may be arranged on at least one base of the trapezium formed by the housing, the ridge 4122 being directed along the first axis X, the ridge participating in the mounting and / or holding of the support 41 on the tooth 31.

[0069] [Fig. 8] represents an embodiment of the arrangement 10 in which a length of the tooth 31 measured along the second direction Y is strictly less than a length measured along the second direction Y between the large base and the small base of a trapezium formed by the housing 41 receiving the tooth 31. In this embodiment, a shim 6 may be arranged to fill a free space created between the large base of the tooth and the large base of the housing, the shim 6 thus exerting pressure on both the tooth and the housing of the support. Advantageously, at least one face of the shim 6 may be provided with a raised area that can collaborate with the tooth or the housing to fix a position of the shim 6 relative to the housing and / or relative to the tooth. In one embodiment, the shim 6 may be made of plastic. Alternatively, the shim 6 may be made of metal.

[0070] In the rest of the document, - the terms "large base of the tooth" and "small base of the tooth" are respectively used to designate the large base and the small base of a trapezium formed by a section along a plane (Y,Z) of the tooth, and - the terms “large base of the housing” and “small base of the housing” are respectively used to designate the large base and the small base of a trapezoid formed by a section along a plane (Y,Z) of the housing.

[0071] [Fig. 10] shows another embodiment of the arrangement 10 in which a locking key 413, materialized by a small projecting area, is arranged on the large base of the housing. Advantageously, the large base of the housing encloses a free space 4124 which increases the flexibility of the large base of the housing, which allows deformation of the large base of the housing during insertion of the tooth into the housing. The large base of the tooth is advantageously equipped with a hollow area intended to collaborate with the locking key 413 to fix a position of the tooth relative to the housing.

[0072] Alternatively, the locking key could be disposed on the large base of the tooth, and a hollow area could be disposed on the large base of the housing, whereby the locking key and the hollow area could cooperate to fix a position of the tooth relative to the housing.

[0073] The invention further relates to a method of mounting an arrangement 10 according to the invention.

[0074] The assembly method, more particularly illustrated by figures 9 to 12, comprises a first step E1 of insertion, along the first axis X, of the support 41 of the arrangement 10 on the tooth 31 of the arrangement 10, so as to place the projecting relief of the coil support opposite or inside the hollow relief of the tooth of the arrangement 10.

[0075] The first insertion step E1 is illustrated in particular by [Fig. 9]. [Fig. 9] represents an embodiment in which the tooth comprises a hollow relief, a section of which in a plane (X, Z) is substantially in an arc of a circle. The movement of the coil support along the first axis X makes it possible to insert the tooth of the arrangement 10 into the housing of the support of the arrangement 10 so as to place the projecting relief of the coil support in the hollow relief of the tooth of the arrangement 10.

[0076] The first image of [Fig.9] also illustrates an embodiment in which the coil support is deformable.

[0077] In an embodiment in which the stator coil support is deformable, the first displacement step may comprise a step of deforming the stator coil support. This step is illustrated in particular by [Fig. 10] in which the deformations of the coil support are shown by arrows directed from the tooth towards the support. The tooth 31 bears on the projecting reliefs arranged on the lateral faces of the housing 41 of the coil support, which creates a deformation of the lateral faces 411 of the housing 41 of the coil support. In addition, the tooth comprises a first locking device arranged on a large base of the tooth, and the coil support comprises a second locking device arranged on a large base of the coil support. As long as the first and second devices are offset along the first axis X, they cannot collaborate, which creates a deformation of the large base of the housing.

[0078] Thus, the deformation step can be carried out simultaneously with at least one other step of the assembly method, in particular simultaneously with the first displacement step, as previously described.

[0079] In one embodiment, the method may further comprise - a second step of sliding the support on the tooth in a radial direction of the stator 3 oriented towards the outside of the stator 3, - and / or a third step of inserting the wedge 6 of the arrangement 10 into the free space created during an execution of the second step, a step of deformation of the coil support being able to be executed in parallel with the second and third steps.

[0080] The second and third steps are illustrated in particular by [Fig. 11]. In a first sub-step 11a, the stator tooth is in abutment against the large base of the housing and a first free space is present between the tooth and the small base of the coil support. Then in a second sub-step 11b, the support is slid onto the tooth in a radial direction of the stator 3 oriented towards the outside of the stator 3. The tooth then comes into contact with the small base of the coil support, thus removing the first free space, and creating a second free space between the tooth and the large base of the housing.

[0081] Then we continue with the third step E3, also illustrated by [Fig. 11], in which a shim 6 is inserted into the second free space. The insertion of the shim 6 advantageously makes it possible to maintain the arrangement 10 in an optimal position, in which the projecting relief of the coil support is inserted into the hollow relief of the tooth.

[0082] The second and third steps E2, E3 are further illustrated by Figures 12 and 13.

[0083] Figures 12 and 13 illustrate the sliding of a coil support 4 relative to a tooth 31 in a radial direction of the stator 3.

[0084] [Fig. 12] represents the arrangement 10 according to the invention at a first given instant T1. In particular at instant T1, the large base of the tooth is substantially in contact with the large base of the housing. At instant T1, a first distance d11 is measured between a lateral face 311 of the tooth and a lateral face of the coil support housing and - a second distance dl2 is measured between the coil support of the arrangement 10 and a coil support arranged on an adjacent tooth of the stator 3, the first and second distances being measured along the third axis Z of a reference RI attached to the lateral face 311. In particular, the first distance dl 1 is substantially equal to 0.534 millimeters and the second distance dl2 is equal to 0.032 millimeters.

[0085] Furthermore, in [Fig.12], there is a free space between the protruding relief 4111 of the support 4 and the hollow relief 3111 of the tooth 31.

[0086] Between the instant T1 and a second instant T2, the coil support has undergone a sliding relative to the tooth, in a radial direction of the tooth directed towards the outside of the stator 3, by a given distance d13. In particular, the given distance d13 being substantially equal to 2.236 millimeters.

[0087] [Fig. 13] represents the arrangement 10 according to the invention at the second instant T2. At instant T2, - a third distance d21 is measured between the lateral face 311 of the tooth and the lateral face of the coil support housing and - a fourth distance d22 is measured between the coil support of the arrangement 10 and the coil support arranged on the adjacent tooth of the stator 3, the third and fourth distances d21, d22 being measured on the third axis Z of a reference RI attached to the lateral face 311.

[0088] In particular, the third distance d21 is approximately equal to 0.1 millimeters and the fourth distance dl2 is equal to 0.9 millimeters.

[0089] Furthermore, in [Fig.13], the projecting relief 4111 of the support 4 rests on the hollow relief 3111 of the tooth 31.

[0090] Thus, at the start of step E2, the large base of the tooth is substantially in contact with the large base of the housing and the distance between two adjacent coil supports is very small, in particular of the order of 3 hundredths of a millimeter; in addition, a distance between a lateral face 311 of the tooth and a face of the housing support located opposite the lateral face 311 is of the order of 5 tenths of a millimeter, this distance generating a distance between the projecting relief 4111 of the support 4 and the hollow relief 3111 of the tooth 31.

[0091] The sliding of the coil supports, in a radial direction of the stator 3 and towards the exterior of the stator 3 greatly reduces the distance measured between the lateral face 311 of the tooth and the face of the housing support, the projecting relief of the coil support then resting on the hollow relief of the housing. In addition, this sliding also increases the distance measured between two adjacent coil supports.

[0092] [Fig. 13] further illustrates the third step E3 of inserting the wedge 6 between the large base of the tooth and the large base of the housing. In the embodiment shown in [Fig. 13], the large base of the housing comprises a groove 4125 extending in the first direction, the groove 4125 being able to collaborate with the wedge 6, so that a first face 61 of the wedge 6 bears against the large base of the tooth and a second face 62 of the wedge 6 bears against a bottom of the groove 4125. Thus, the wedge 6 applies pressure to the tooth and to the support so as to push the tooth towards the small base of the support, which contributes to maintaining the projecting relief in the hollow relief.

[0093] In one embodiment, the method further comprises a fourth step E4 of locking the stator coil support on the tooth. In the embodiment of the arrangement 10 described by [Fig. 10], a locking key 413, materialized by a small projecting area, is arranged on the large base of the housing. The large base of the tooth is advantageously equipped with a hollow area intended to collaborate with the locking key 413 to fix a position of the tooth relative to the housing. The locking step is therefore carried out when the locking key is opposite a housing capable of containing the locking key.

[0094] Finally, the arrangement according to the invention implements a simple solution for preventing movements of a coil holder of the arrangement relative to a tooth of the arrangement, the coil holder being arranged on the tooth. By means of the invention, tangential, axial and rotational movements of the coil holder relative to the tooth are prevented. The invention further makes it possible to prevent vibrations of the coil holder relative to the tooth.

[0095] The embodiments of an arrangement according to the invention are very varied. In particular, it is possible to combine different characteristics, including: - a method of fixing the support relative to the tooth, comprising an installation by radial sliding of the support relative to the tooth, and / or use of flexibility of the support, and / or locking of the support on the tooth, and / or the interposition of a wedge between a surface of the tooth and a surface of the support, - as illustrated by [Fig.14], a shape of the protruding reliefs and hollow reliefs arranged in the arrangement, in particular a rounded or triangular cross-section, and / or the hollow and protruding reliefs forming stairs on at least two levels, and / or the hollow and protruding reliefs extending over all or part of a surface on which they are arranged.

[0096] Advantageously, an arrangement according to the invention can be manufactured according to usual manufacturing methods, for example a stator tooth of an arrangement according to the invention can be manufactured by rolling and a stator coil support can be manufactured by molding. In addition, the solution implemented in the invention makes it possible to avoid the use of glue to fix the support on the tooth, which would require more space and would lead to a loss of performance of the electric motor.

[0097] Furthermore, the solution implemented in the invention allows greater dispersion in the manufacture of the stator, in particular of the stator teeth, the arrangement ensuring a fixing of the support and the winding on the tooth which makes it possible to compensate for a dispersion on the dimensions of the tooth.

[0098] Finally, the scope of the invention is broad. It concerns electric motors, including electric vehicles and in particular for hybrid electric vehicles, and more generally devices using an electric motor, such as cranes, elevators, airplanes, motorcycles, trains, wind turbines.

Claims

Claims

1. Arrangement (10) for a motor (1) of an electric motor vehicle (100) comprising - a tooth (31) of a stator (3) of the electric motor vehicle (100), a first face (311), mainly flat, of the tooth (31) being parallel to a radial plane of the stator (3), and - a stator coil support (4) comprising a housing (41) in which the stator tooth (31) is inserted, the stator (3) substantially forming an inner cylinder of given axis (X), characterized in that the first face (311) of the tooth (31) comprises a hollow relief (3111) whose depth is measured in a direction perpendicular to the first face (311), and in that, when the tooth (31) is arranged in the housing (41) of the coil support (4), the hollow relief (3111) collaborates with a projecting relief (4111) of a second face (411) of the housing (41) arranged opposite the first face (311), so as to prevent movement of the support (4) relative to the tooth (31).

2. Arrangement (10) according to the preceding claim, characterized in that a dimension of the hollow relief (3111) measured along a radius of the stator (3) is strictly less than a dimension of the tooth (31) measured along a radius of the stator (3) or a dimension of the hollow relief (3111) measured along a radius of the stator (3) is equal to a dimension of the tooth (31) measured along a radius of the stator (3), and in that a dimension of the projecting relief (4111) measured along a radius of the stator (3) is less than or equal to the dimension of the hollow relief (3111) measured along a radius of the stator (3).

3. Arrangement (10) according to one of the preceding claims, characterized in that - a section, along a plane perpendicular to the second face (411), of the projecting relief (4111) is in the shape of an arc of a circle or in the shape of an acute angle, and / or - the protruding relief (4111) forms at least two segments each extending mainly along a radius of the stator (3) and the at least two segments being arranged at different heights measured along the given axis (X), and / or - a height measured along the given axis (X) of a point located in a median zone of the salient relief (4111) is greater than a height measured along the given axis (X) of a point located outside the median zone.

4. Arrangement (10) according to one of the preceding claims, characterized in that a dimension of the tooth (31) measured along a radius of the stator (3) is strictly less than a dimension of the housing (41) measured along a radius of the stator (3), in that the support is arranged in abutment against the tooth (31) in a radial direction of the stator (3) so as to create a free space between the support and the tooth (31) and in that the arrangement (10) comprises a wedge (6) inserted in the free space.

5. Arrangement (10) according to the preceding claim, characterized in that at least one face of the wedge (6) is provided with a raised area capable of collaborating with the tooth (31) or the housing (41) to fix a position of the wedge (6) relative to the housing (41) and / or relative to the tooth (31), and / or in that the wedge (6) is made of a plastic and / or metallic material.

6. Arrangement (10) according to one of the preceding claims, a first section of the tooth (31), along a plane perpendicular to the given axis (X) being substantially in the shape of a first trapezium, and a second section of the housing (41) of the coil support along a plane perpendicular to the given axis (X) being substantially in the shape of a second trapezium, characterized in that - the tooth (31) comprises a first locking device arranged on a large base of the first trapezium capable of collaborating with a second locking device arranged on a large base of the second trapezium and / or - the tooth (31) comprises a third locking device arranged on a small base of the first trapezium capable of collaborating with a fourth locking device arranged on a small base of the second trapezium.

7. Arrangement (10) according to the preceding claim, characterized in that a crest is arranged along the given axis (X) on at least one base of the trapezium formed by the housing (41), the crest participating in the mounting and / or holding of the support on the tooth (31).

8. Arrangement (10) according to one of the preceding claims, characterized in that a surface of the stator coil support intended to receive a winding of an electric wire is flexible, in particular walls of the housing (41) are capable of deforming towards the inside or the outside of the housing (41).

9. Stator (3) for an electric motor (1) of a motor vehicle (100), characterized in that it comprises an arrangement (10) according to one of the preceding claims.

10. Motor vehicle (100) comprising a stator (3) according to the preceding claim or an arrangement (10) according to one of claims 1 to 8.

11. Method for mounting an arrangement (10) according to one of claims 1 to 8, characterized in that it comprises a first step of inserting, along the given axis (X), the coil support of the arrangement (10) onto the tooth of the arrangement (10) so as to place the projecting relief (4111) of the coil support opposite or inside the hollow relief (3111) of the tooth of the arrangement (10).

12. Method of mounting according to the preceding claim of an arrangement (10) according to one of claims 1 to 8 and according to claim 4, characterized in that it comprises, following the first step: - a second step of sliding the support on the tooth in a radial direction of the stator (3) oriented towards the outside of the stator (3), - and optionally a third step of inserting the wedge (6) of the arrangement (10) into the free space created during execution of the second step.

13. A method of mounting according to claim 11 or 12, an arrangement (10) according to claim 8, characterized in that it further comprises a fourth step of locking the stator coil support on the tooth and / or a fifth step of deforming the stator coil support.

14. Mounting method according to the preceding claim, characterized in that the deformation step is carried out simultaneously with at least one of the first, second, third or fourth steps.

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