JP4470016B2 - Stator and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stator and a manufacturing method thereof.
[0002]
[Prior art and problems to be solved by the invention]
For example, in Japanese Patent Laid-Open No. 2000-156943, a plurality of teeth cores that are arranged radially from the center and are respectively disposed on the outer peripheral side of teeth cores that are adjacent to each other, and each teeth core is annular A stator comprising a plurality of core back iron cores connected to each other and stator windings wound on the inner peripheral side of each tooth iron core is disclosed. In such a stator, by inserting a core back iron core between each tooth iron core, the stator iron core is formed as a whole in an annular shape and projecting toward the center as pole teeth in the center direction.
[0003]
By the way, in the manufacture of such a stator, an annular stator core is formed by sequentially inserting one core back core between each tooth core, but between the teeth core and the core back core or adjacent to each other. If there is a gap between the core back core and the core stator core, a truly annular stator core cannot be formed and the iron loss increases, and therefore the performance as a stator deteriorates. Moreover, in order to suppress the generation | occurrence | production of the said clearance gap, it is necessary to contact | connect each iron core, whenever a core back iron core is inserted between teeth iron cores, and a manufacturing operation is complicated.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-156943
The present invention has been made in view of the above-described problems, and has the following objects.
(1) A high-performance stator is provided by suppressing a gap between a teeth core and a core back core and between adjacent core back cores.
(2) The complexity in the manufacturing work of the stator composed of the teeth iron core and the core back iron core is suppressed.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, as a first means related to the stator, a plurality of teeth iron cores and core back iron cores are alternately arranged to form an annular stator iron core. The stator includes a plurality of connecting members that are arranged on the outer peripheral surface of the stator iron core and that are in close contact with each other and that are adjacent to each other.
[0007]
A second means related to the stator is a stator in which a plurality of teeth cores and core back cores are alternately arranged to form an annular stator core, and a predetermined winding is applied to the stator core. Thus, a configuration including a plurality of connecting members arranged on the outer peripheral surface of the stator core and closely contacting and connecting the teeth cores adjacent to each other is adopted.
[0008]
As a third means related to the stator, in the first or second means described above, the connecting member includes a fitting portion having a predetermined shape, and a specific surface of the teeth core or the core back iron core constituting the outer peripheral surface of the stator core. A configuration is adopted in which the core back iron cores adjacent to each other or the tooth iron cores are brought into close contact with each other by fitting the fitting portion into a fitted portion formed on a specific surface.
[0009]
On the other hand, in the present invention, as a first means related to the stator manufacturing method, a predetermined winding is applied to a plurality of teeth cores arranged in an annular shape at predetermined intervals, and then a core back core is placed between the teeth cores. A stator manufacturing method in which an annular stator core is inserted by inserting a plurality of connecting members that connect core back cores adjacent to each other, thereby bringing the core back cores adjacent to each other into close contact with each other. Is adopted.
[0010]
Further, as a second means related to the stator manufacturing method, a predetermined winding is applied to a plurality of teeth cores arranged in an annular shape with a predetermined interval, and then a core back core is inserted between the teeth cores. A method of manufacturing a stator that forms an annular stator core, in which a plurality of connecting members that connect adjacent tooth cores to each other is provided so that adjacent tooth cores are brought into close contact with each other.
[0011]
As a third means relating to the stator manufacturing method, in the first or second means described above, the coupling member is provided with a pair of fitting portions having a predetermined shape, and the teeth iron core constituting the outer peripheral surface of the stator iron core A fitting portion that fits into the fitting portion is formed on a specific surface of the core back core or a specific surface of the core back core, and one of the coupling portions of the connecting member is fitted to one of the core back iron cores or the teeth core adjacent to each other. The core back iron cores adjacent to each other or the tooth iron cores are engaged with each other by fitting the other fitting portion of the connecting member with the mating portion of the other core back iron core or the teeth iron core adjacent to each other. Adopting a structure that adheres to each other.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a stator and a manufacturing method thereof according to the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a partially exploded perspective view of a stator according to the present embodiment. In this figure, symbol A is a stator, 1 is a teeth iron core, 2 is a core back iron core, 3 is a winding, and 4 is a connecting piece (connecting member). The plurality of teeth cores 1 and the plurality of core back cores constitute an annular stator core.
[0014]
As can be seen from this figure, this stator A is formed by forming an annular stator core by alternately arranging a plurality of teeth cores 1 and core back cores 2, and winding the stator core 3. It is. Although not shown, such a stator A is housed and fixed in a motor housing, and a rotor is disposed on the inner peripheral side.
[0015]
Each teeth iron core 1 is an iron core forming pole teeth, and is formed by laminating, for example, plate-like iron plates. Each of these teeth iron cores 1 is arranged radially at a predetermined interval as shown in the figure. As shown in the figure, windings 3 are applied to the gaps of the respective teeth cores 1, that is, the side portions of the respective teeth cores 1.
[0016]
The core back iron core 2 is provided between and adjacent to the adjacent iron cores 1 in order to connect the teeth iron cores 1 arranged in this manner in an annular shape. In this stator A, a part of the teeth core 1 is not exposed to the outer peripheral side of the stator core, and therefore the outer peripheral surface of the stator core is only the outer surface 2a (specific surface) of each core back core 2 as shown in the figure. It is constituted by. In such an outer surface 2a, a belt-like groove 2b having a predetermined width is formed.
[0017]
The connecting pieces 4 are elastic plate-like members provided for tightly connecting and connecting the core back cores 2 adjacent to each other, and band-like claws that fit into the grooves 2b of the core back core 2 at both ends. 4a. Such a connecting piece 4 is fixed on the outer surface 2a of the core back iron core 2 by fitting the claws 4a at both ends into the respective grooves 2b of the core back iron cores 2 adjacent to each other, and the cores adjacent to each other. The back iron core 2 is closely attached and connected.
[0018]
Next, a manufacturing method of the stator A having such a configuration will be described in detail along the flowchart shown in FIG.
[0019]
When manufacturing this stator A, first, each tooth iron core 1 is fixed to the iron core fixing | fixed part of a winding machine (step S1). The iron core fixing portion holds each tooth iron core 1 at a predetermined interval as shown in FIG. 1 by gripping each tooth iron core 1 from the inner peripheral side of each tooth iron core 1 (that is, the side where the rotor is disposed). Fix them radially apart.
[0020]
And the winding 3 is given to the side part of each teeth iron core 1 fixed to this using a winding machine (step S2). Here, since each tooth iron core 1 is gripped from the inner periphery side by the iron core fixing portion, the outer periphery side of each tooth iron core 1 is in an open state. Therefore, the winding machine applies the windings 3 to the side portions of the teeth cores 1 by moving the nozzles for feeding out the wires from the outer peripheral side and moving them along a predetermined path.
[0021]
When the winding process is completed in this way, two core back cores 2 are mounted between the adjacent tooth cores 1 (step S3), and the connecting pieces 4 are mounted on the two core back cores 2 ( Step S4). Here, FIG. 3 is a view showing a method of mounting the connecting piece 4 to the core back iron core 2. As shown in the drawing, when the two core back cores 2 are mounted between the tooth cores 1, the two core back cores 2 are pressed and adhered from both sides using a pressing rod. In this state, the connecting piece 4 is lowered from above to engage the claws 4 a of the connecting piece 4 with the grooves 2 b of the two core back cores 2.
[0022]
Then, by determining whether or not all the core back iron cores 2 and the connecting pieces 4 have been attached (step S5), the processing of steps S3 and S4 is repeated, so that all of the tooth iron cores 1 constituting the stator iron core 1 can be obtained. When the core back iron core 2 is inserted therebetween and the connecting pieces 4 are mounted between all the core back iron cores 2 adjacent to each other, the production of the stator A is completed.
[0023]
According to the present embodiment, the core back iron cores 2 adjacent to each other are brought into close contact with and connected to each other with the connecting pieces 4, so that the generation of a gap between the core back iron cores 2 is suppressed. Therefore, since a true annular stator core can be formed, a high-performance stator can be realized, and all the core back cores 2 can be easily brought into close contact with each other without gaps. It is possible to reduce complexity in the work.
[0024]
In addition, this invention is not limited to the said embodiment, For example, the following modifications can be considered.
[0025]
(1) In the above embodiment, the claw portions 4a of the connecting pieces 4 are engaged with the grooves 2b of the core back iron core 2 so that the core back iron cores 2 are brought into close contact with each other. The configuration of the frame 4 is not limited to this. FIG. 4 is a perspective view showing the configuration of the core back iron core 2A and the connecting piece 4A according to one modification. This core back iron core 2A has two strip-shaped convex portions 2c having a semi-circular step name on the outer surface, and a strip-shaped concave portion fitted in the strip-shaped convex portion 2c in the vicinity of both ends of the connecting piece 4A. 4b is formed. By inserting the belt-like concave portions 4b of the connecting pieces 4A into the belt-like convex portions 2c of the core-back iron core 2A, the adjacent core-back iron cores 2A are brought into close contact with the connecting pieces 4A.
[0026]
(2) In the above embodiment, a part of the teeth core 1 is not exposed to the outer peripheral side of the stator core, and the outer peripheral surface of the stator core is configured only by the outer surface 2a of each core back core 2. The present invention is not limited to such shapes of the teeth core 1 and the core back core 2. The teeth core may be exposed on the outer peripheral side of the stator core, and the outer peripheral surface of the stator core may be constituted by the teeth core and the core back core. When such a configuration is adopted, the core cores adjacent to each other with the teeth core interposed therebetween are not connected by the connecting pieces, but the adjacent teeth cores are connected with the connection pieces with the core back core interposed therebetween. Alternatively, the teeth iron core and the core back iron core adjacent to each other may be connected by a connecting piece.
[0027]
(3) In the above embodiment, the core back iron cores 2 adjacent to each other are connected by the connecting pieces 4. However, the core back iron cores 2 at both ends sandwiching one or a plurality of core back iron cores 2 are connected to the connecting pieces 4. You may make it connect with a wide connection top. By adopting such a configuration, the total number of connected frames can be reduced.
[0028]
(4) In the above embodiment, the connecting piece 4 is lowered from above to engage the claw portions 4a of the connecting piece 4 with the grooves 2b of the two core back cores 2, but the present invention is not limited thereto. It is not limited. You may make it mesh | engage the nail | claw part 4a with the groove | channel 2b by pressing the connection piece 4 from the outer peripheral side of a stator iron core to the core back iron core 2, and elastically deforming the connection piece 4. FIG.
[0029]
【The invention's effect】
As described above, according to the present invention, a stator in which a plurality of teeth cores and core back cores are alternately arranged to form an annular stator core, and a predetermined winding is applied to the stator core. In addition, since it includes a plurality of connecting members that are arranged on the outer peripheral surface of the stator core and that closely contact and connect the core back cores adjacent to each other, it is possible to realize a high-performance stator and to manufacture the stator It is possible to suppress the complexity.
[Brief description of the drawings]
FIG. 1 is a partially exploded perspective view showing a configuration of a stator A according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a manufacturing procedure of a stator A according to an embodiment of the present invention.
FIG. 3 is a perspective view showing a method for mounting a connecting piece 4 in a method for manufacturing a stator A according to an embodiment of the present invention.
FIG. 4 is a perspective view showing a modified example of a connecting piece in a stator A according to an embodiment of the present invention.
[Explanation of symbols]
A ... Stator 1 ... Teeth iron core 2, 2A ... Core back iron core 2b ... Groove 2c ... Band-shaped convex part 3 ... Winding 4, 4A ... Connecting piece (connecting member)
4a …… Nail 4b …… Strip-shaped recess

Claims (2)

A stator formed by alternately arranging a plurality of teeth cores and core back cores to form an annular stator core, and applying predetermined windings to the stator core,
A plurality of connecting members that are disposed on the outer peripheral surface of the stator core, and that tightly connect and connect the core back cores adjacent to each other;
The core back iron core has two belt-like convex portions formed on the outer surface, and is provided between the teeth iron cores adjacent to each other and on the outer peripheral side, and the outer peripheral surface of the stator iron core is constituted only by the outer surface,
The connecting member includes two band-shaped recesses that fit into the band-shaped protrusions, one band-shaped recess is fitted to the band-shaped protrusions of one adjacent core back iron core, and the other band-shaped recesses are mutually connected. A stator characterized in that adjacent core back cores are brought into close contact with each other by being fitted to a belt-like convex portion of the other adjacent core back core . A stator manufacturing method in which a predetermined winding is applied to a plurality of teeth cores arranged in an annular shape at predetermined intervals, and then a core back core is inserted between the teeth cores to form an annular stator core. And
Forming two belt-like convex portions on the outer surface of the core back core;
The core back core is provided between and adjacent to the teeth cores so that the outer peripheral surface of the stator core is constituted only by the outer side surface of the core back core,
A plurality of connecting members having two belt-like recesses to be fitted to the belt-like convex portions are provided, one belt-like concave portion is fitted to the belt-like convex portions of one core back iron core adjacent to each other, and the other belt-like concave portions are mutually connected. A stator manufacturing method characterized in that adjacent core back cores are brought into close contact with each other by being fitted to a belt-like convex portion of the other adjacent core back core.

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