JP4405160B2 - Stator manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a stator used in a rotating electric machine such as an electric motor or a generator.
[0002]
[Prior art]
Conventionally, as a stator used in a rotating electric machine such as an electric motor or a generator, a plurality of teeth cores arranged in a ring and a plurality of core back cores provided between adjacent teeth cores are provided. There has been proposed a stator formed by winding a stator winding around the side surface (see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-4-236149 [0004]
[Problems to be solved by the invention]
However, if the teeth core and core back core are not properly positioned, the positions of the teeth core and core back core will shift when the outer periphery holding ring is pressed into the outer peripheral surface of the teeth core or core back core. As a result, the molding accuracy may deteriorate. Therefore, in order to connect the iron cores adjacent in the circumferential direction while being positioned in the radial direction, it has been considered to provide a fitting concave portion and a fitting convex portion that are fitted with irregularities in the circumferential direction.
[0005]
However, in this case, when inserting the core back core between adjacent teeth cores from the radial direction, it is expected that the fitting convex portion protruding in the circumferential direction interferes to make insertion difficult. There was room for further improvement in this regard.
[0006]
This invention is made | formed in view of such a situation, and it aims at providing the manufacturing method of the stator which can connect a teeth iron core and a core back iron core easily.
[0007]
[Means for Solving the Problems]
The invention described in claim 1, which has been made to solve the above problems, includes a plurality of teeth cores arranged at predetermined intervals on the circumference of a predetermined reference circle (for example, the teeth core 11 in the embodiment described later). And a core-back iron core (for example, a core in an embodiment described later) inserted from the radial direction or the axial direction of the reference circle (for example, a reference circle D0 in the embodiment described later) on the outer peripheral side between adjacent teeth cores In a method of manufacturing a stator including a back iron core 12), the teeth iron core is positioned by an inner diameter jig (for example, a teeth fixing jig 29 in an embodiment to be described later) disposed on the tip side of the teeth iron core. A winding step of winding a conductive wire (for example, a stator winding 13 in an embodiment described later) between the teeth cores, and a positioning portion of the inner diameter jig A jig releasing step of releasing, characterized in that it comprises a core back core insertion step of inserting the core back core from a radial or axial direction of the reference circle on the outer peripheral side between the teeth cores.
[0008]
According to the present invention, the core back core is inserted by inserting the core back core from the radial direction or the axial direction of the reference circle in the core back core insertion step in a state where the positioning of the teeth core is released in the jig release step. The position of the teeth core can be shifted so that it can be easily inserted. Therefore, even if the fitting recesses and fitting projections that fit in the circumferential direction between the iron cores adjacent in the circumferential direction are provided, the fitting projections protruding in the circumferential direction interfere with each other. It is no longer difficult to insert the core back core between the teeth cores.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a stator according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic plan view showing a stator in the first embodiment of the present invention.
The stator 10 according to the present embodiment includes a plurality of teeth cores 11 arranged radially at predetermined intervals on the circumference of a predetermined reference circle D0, and a core back core disposed between adjacent teeth cores 11, 11. 12.
[0012]
The teeth core 11 has a predetermined thickness in a direction parallel to the central axis of the reference circle D0 (a direction perpendicular to the paper surface of FIG. 1), and is disposed on the inner peripheral side around which the stator winding 13 is wound. The winding part and the yoke part of the outer periphery side in which the core back iron core 12 is inserted are comprised. Moreover, the latching | locking part 17 which protrudes toward the outer side of the circumferential direction is provided in the edge part of the teeth iron core 11. As shown in FIG. The teeth iron core 11 is formed by laminating magnetic steel sheets having directivity such as silicon steel sheets. For example, the easy magnetization direction is set in the radial direction of the stator 10.
[0013]
The core back iron core 12 is formed in a substantially L shape, and is provided from the outer peripheral side between the tooth iron cores 11, 11 to the back side of the tooth iron core 11. As will be described later, the core back iron core 12 is inserted and arranged between the tooth iron cores 11 and 11 from the radially outer side of the tooth iron core 11, and the base end side is fixed so as to be sandwiched between the tooth iron cores 11 and 11. The The thickness of the core back core 12 is formed to be equal to the thickness of the teeth core 11, for example. The core back iron core 12 is formed in a substantially L shape formed by laminating magnetic steel sheets having directivity such as silicon steel sheets, and the easy magnetization direction is set, for example, in the circumferential direction of the stator 10.
[0014]
The core back iron core 12 is provided with a fitting concave portion 18 on one side surface outside the teeth iron core 11 and a fitting convex portion 19 fitted on the fitting concave portion 18 on the other side surface. Further, on the other side surface of the core back iron core 12, a fitting convex portion 20 that fits into a fitting concave portion 21 provided on the outer peripheral side surface of the tooth iron core 11 is provided.
[0015]
If it does in this way, when providing the said core back core 12 from the outer peripheral side between the said teeth iron cores 11 and 11 to the back side of the said teeth iron core 11, the said core back iron core which touches the side surface of the said iron core 11 and this side surface 12 are fitted with the fitting recess 21 and the fitting projection 20, and the adjacent core back cores 12, 12 are fitted with the fitting recess 18 provided on each side and the fitting projection. It can be fitted with the part 19.
Further, a protrusion 22 smaller than the width is provided on the back surface of the tooth core 11, and a fitting recess 23 that fits with the protrusion 22 is provided on the inner peripheral side of the core back core 12. By fitting the fitting recess 23 into the protrusion 22, the fastening force between the teeth iron core 11 and the core back iron core 12 can be further increased.
[0016]
As shown in FIG. 1, the teeth iron core 11 is held in a state in which the respective locking portions 17 are brought into contact with the outer diameter side of the substantially cylindrical teeth fixing jig 29. As shown in FIG. 3, the teeth fixing jig 29 includes a teeth positioning member 32 that positions the teeth core 11, a holding base 34 that holds the positioning member 32 so as to advance and retract in the radial direction, and the positioning member 32. Has a slide member 31 that advances and retracts in the radial direction, and a shaft portion 30 that slidably holds the slide member 31.
[0017]
The slide member 31 is formed in an inverted frustoconical shape having a hollow portion in the axial center, and the diameter is increased from the lower side in the axial direction toward the upper side. The slide member 31 is held by a shaft portion 30 penetrating the hollow portion so as to be slidable in the axial direction.
Further, a holding base 33 whose outer shape is formed in a substantially annular shape is provided on the outer peripheral side of the slide member 31. In the holding base 33, the positioning members 32 are provided radially with a predetermined interval. The same number of the positioning members 32 as the teeth core 11 are provided, and the positioning members 32 are provided so as to face the teeth core 11 in the radial direction.
[0018]
The positioning member 32 includes a tapered surface 32 a corresponding to the tapered surface 31 a of the slide member 31. When the slide member 31 and the tapered surfaces 31 a of the positioning member 32 are in contact with each other, the positioning member 32 is held by the slide member 31 so as to protrude radially outward. In this state, the outer peripheral surface of the positioning member 32 coincides with the reference circle D0 and comes into contact with the inner peripheral surface of the opposing teeth core 11, so that the teeth core 11 is positioned by the positioning member 32. Retained. The teeth core 11 is held at both axial ends by holding members (not shown), and movement in the axial direction is restricted.
[0019]
FIG. 2 is an explanatory view showing a winding process in the manufacturing process of the stator of FIG. As shown in the figure, the stator winding 13 is wound between the winding portions of the tooth core 11 fixed to the teeth fixing jig 29 by the nozzle 28 provided in the winding machine. The winding machine is set so that the stator winding 13 of the same phase is wound between the same teeth core 11 for each turn. For example, in the case of a three-phase motor, it is configured to supply a plurality of stator windings 13 in a bundled state corresponding to the U phase, the V phase, and the W phase. 13 is wound around each iron core 11.
[0020]
In this way, a plurality of stator windings 13 are supplied from one nozzle 28, and the plurality of nozzles 28 are simultaneously circulated between the teeth iron cores 11 and 11 with a predetermined interval therebetween, so that the stator winding 13 is provided. Since winding is performed, the time required for mounting the stator winding 13 can be shortened, and the space factor can be improved.
[0021]
FIG. 3 is an explanatory view showing a positioning process in the manufacturing process of the stator of FIG. In the present embodiment, each core back core 12 is sequentially inserted in a state where each tooth core 11 is positioned by the fixing jig 29 on the radially inner side, and the last core back core 12 is inserted. A jig releasing step for releasing the positioning state of the teeth core 11 is performed.
[0022]
FIG. 4 is an explanatory view showing a jig releasing step and a core back iron core inserting step in the stator manufacturing step of FIG. The jig releasing step is performed by moving the slide member 31 upward in the axial direction. When the slide member 31 is moved upward in the axial direction, the positioning member 32 that is in contact with the slide member 31 moves inward in the radial direction from the reference circle D0 while sliding, and the teeth core that has been in contact is moved. 11 and separated. Thereby, positioning of teeth iron cores 11 and 11 is canceled, and the last core back iron core 12 is inserted in this state. As described above, the core back iron core 12 is inserted by inserting the core back iron core 12 from the radial direction of the reference circle D0 in the core back iron core inserting step in the state where the positioning of the teeth iron core 11 is released in the jig releasing step. The position of the teeth core 11 can be shifted so that it is easy to do.
Therefore, even if the fitting recesses 18 and 21 and the fitting projections 19 and 20 that are fitted in the circumferential direction with the iron cores 11 and 12 adjacent in the circumferential direction are provided in the circumferential direction, The protruding projections 19 and 20 that protrude are interfered with each other so that it becomes difficult to insert the core back core 12 between the teeth cores 11 and 11.
[0023]
In the embodiment, the jig releasing step is performed when the last core back core 12 is inserted. However, the present invention is not limited to this. For example, when the core back iron core 12 is inserted first, the jig is released. You may perform a process.
[0025]
The present invention is not limited to the above-described embodiment. For example, a rectangular core back core may be used instead of the L-shaped core back core 12. Moreover, you may use the iron core which does not have the fitting recessed parts 18 and 21 and the fitting convex parts 19 and 20. FIG. Moreover, you may perform the insertion of the core back iron core 12 between adjacent teeth iron cores 11 and 11 not from a radial direction but from an axial direction.
[0026]
【The invention's effect】
As described above, according to the invention described in claim 1, the core back iron core is moved in the radial direction or axial direction of the reference circle in the core back iron core insertion step in the state where the positioning of the tooth iron core is released in the jig releasing step. By inserting from above, the position of the teeth core can be shifted so that the core back core can be easily inserted. Therefore, the teeth iron core and the core back iron core can be easily connected.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a stator in a first embodiment of the present invention.
FIG. 2 is an explanatory view showing a winding process in the manufacturing process of the stator of FIG. 1;
3 is an explanatory view showing a positioning process in the manufacturing process of the stator of FIG. 1; FIG.
4 is an explanatory view showing a jig releasing step and a core back iron core inserting step in the manufacturing process of the stator of FIG. 1. FIG .
[Explanation of symbols]
10 Stator 11 Teeth Iron Core 12 Core Back Iron Core 13 Stator Winding 29 Teeth Fixing Jig

Claims (1)

  Fixed with a plurality of teeth cores arranged at predetermined intervals on the circumference of a predetermined reference circle, and a core back core inserted from the radial direction or the axial direction of the reference circle on the outer peripheral side between adjacent teeth cores In the child manufacturing method, a winding step of winding the conductive wire between the teeth cores in a state where the teeth core is positioned by the inner diameter jig arranged on the tip side of the teeth core, and a positioning portion of the inner diameter jig And a core back iron core inserting step for inserting the core back iron core from the radial direction or the axial direction of the reference circle to the outer peripheral side between the teeth iron cores. .

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