JP2011254616A - Laminated stator core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve strength and accuracy of a laminated stator core constituted by combining a divided core laminate.SOLUTION: A laminated stator core 100 in an annular shape is constituted by combining a plurality of divided core laminates 110 at both ends of a yoke section 111 in a circumferential direction. In each divided core laminate 110, a coupling protrusion 141 of the adjacent divided core laminate 110 is closely fitted to a coupling groove 131 formed on the divided core laminate 110 at one end of the circumferential direction, and a first coupling hole 132 and a second coupling hole 142 become in a communication state, through which a spring pin 120 is inserted. The coupling protrusion 141 formed on the divided core laminate 110 is closely fitted to the coupling groove 131 on the adjacent divided core laminate 110 at the other end of the circumferential direction, and the first coupling hole 132 and the second coupling hole 142 become in the communication state, through which the spring pin 120 is inserted.

Description

The present invention relates to a stator laminated iron core.
In particular, the present invention relates to a stator laminated core formed by arranging and connecting a plurality of divided core laminates in an annular shape.

  In a rotating electrical machine such as an electric motor, a stator laminated core formed by arranging and connecting a plurality of divided core laminated bodies in a ring shape may be adopted as the stator iron core.

  FIG. 4 is a perspective view showing a conventional divided core laminate 10. The divided core laminate 10 is divided for each tooth (magnetic pole tooth) unit, and is configured by caulking and laminating a plurality of divided core pieces (laminated steel plates).

The divided core laminate 10 includes a yoke portion 11 that extends in the circumferential direction and a teeth portion 12 that extends from the yoke portion 11 toward the inside in the radial direction.
Such a split core laminate 10 is arranged in a ring shape, and the split core stacks 10 adjacent to each other in the circumferential direction are connected to each other at the end in the circumferential direction of the yoke portion 11, so that a ring-shaped stator laminate core is obtained. It is formed.
Holes 13 are formed in the teeth portion 12 along the stacking direction (α direction in FIG. 4).

  When fixing such a divided core laminate 10, it is necessary to insert a bolt 20 into the hole 13 of each divided core laminate 10 and fix the bolt 20 by screwing it to a motor frame or the like. .

  In the present specification and claims, the directions of “circumferential direction” and “radial direction” in the split core laminate 10 are “circumferential direction” and “radial direction” in the state where the annular stator laminated core is formed. Is used to mean the same direction.

JP-A-8-186958

By the way, in the above prior art, since each divided core laminate 10 is fixed to a motor frame or the like with bolts 20 or the like, the connection state between adjacent divided core laminates 10 is not strong and is formed in an annular shape. There was a problem that the dimensional accuracy of the stator laminated iron core was low.
In view of the above-described prior art, an object of the present invention is to provide a stator laminated iron core that is strong and has high dimensional accuracy.

The configuration of the present invention for solving the above problems is as follows.
A plurality of divided core laminates which are integrally provided with a yoke portion extending in the circumferential direction and a teeth portion extending radially inward from the yoke portion are arranged in an annular shape, and adjacent divisions in the circumferential direction In the stator laminated core formed by connecting the core laminates to each other at the circumferential ends of the yoke portion,
In each split core laminate,
At one end in the circumferential direction of the yoke part,
A connecting groove formed along the stacking direction from one surface side in the stacking direction toward the other surface side in the stacking direction to a position in the middle of the stacking direction;
In a state communicating with the connection groove, a first connection hole formed along the stacking direction is provided from a position in the stacking direction to the other surface in the stacking direction,
At the other end in the circumferential direction of the yoke part,
It is formed along the laminating direction from one surface side in the laminating direction to the middle surface in the laminating direction from the other surface side in the laminating direction, and has a shape that fits closely into the connecting groove and in the laminating direction. A connecting protrusion having a length equal to the length of the connecting groove,
A second connecting hole formed in the connecting protrusion along the stacking direction is provided;
Each divided core laminate adjacent in the circumferential direction is
At one end in the circumferential direction, the connection protrusions of the adjacent divided core laminates are closely fitted in the connection grooves formed in the divided core laminate, and the first connection hole and the second connection hole Is in communication,
At the other end in the circumferential direction, a connection protrusion formed on the split core laminate is closely fitted in a connection groove of an adjacent split core stack, and the first connection hole and the second connection The hole is in communication,
A spring pin is tightly inserted into the first connection hole and the second connection hole that are in communication with each other.

The configuration of the present invention is as follows.
The connecting groove is a dovetail groove,
The connection protrusion has a shape that fits closely into the connection groove.

  In the present invention, the adjacent divided core laminates are connected to the first connection hole and the first connection hole in which the connection groove and the connection protrusion are closely fitted in the end portion in the circumferential direction of the yoke portion, and are in communication with each other. Since the spring pin is fitted in the two connection holes, the connection between the split core laminates is strengthened, and the dimensional accuracy of the annular stator core is increased.

The perspective view which shows the stator laminated iron core which concerns on the Example of this invention. The perspective view which shows the division | segmentation iron core laminated body used for the stator laminated iron core which concerns on the Example of this invention. The perspective view which shows the division | segmentation iron core laminated body used for the stator laminated iron core which concerns on the Example of this invention. The perspective view which shows the division | segmentation iron core laminated body used for the conventional stator laminated iron core.

  Hereinafter, embodiments of the present invention will be described in detail based on examples.

  As shown in FIG. 1, the stator laminated core 100 according to the embodiment of the present invention is configured by arranging a plurality of divided core laminated bodies 110 in an annular manner and connecting them.

  As shown in FIGS. 2 and 3, each divided iron core laminate 110 integrally includes a yoke portion 111 extending in the circumferential direction and a teeth portion 112 extending radially inward from the yoke portion 111. It is configured. Such a split core laminate 110 is configured by caulking and laminating a plurality of split core pieces (laminated steel plates).

A connecting groove 131 and a first connecting hole 132 are provided at one end (left side in FIGS. 2 and 3) of the yoke portion 111 in the circumferential direction (C direction in FIGS. 2 and 3).
Specifically, the connecting groove 131 is a dovetail groove in this example. The connecting groove 131 extends from one surface S1 side in the stacking direction (α direction in FIGS. 2 and 3) to the middle position in the stacking direction (for example, the center position) from the other surface S2 side in the stacking direction. It is formed along the stacking direction.
The first connecting hole 132 is formed so as to penetrate along the stacking direction from a position in the stacking direction (α direction) (for example, the center position) to the other surface S2 in the stacking direction in a state of communicating with the connecting groove 131. Has been.

A connecting projection 141 and a second connecting hole 142 are provided at the other end (right side in FIGS. 2 and 3) of the yoke 111 in the circumferential direction (C direction in FIGS. 2 and 3).
The connecting protrusion 141 extends from one surface S1 side in the laminating direction (α direction in FIGS. 2 and 3) to a position in the middle of the laminating direction (for example, a central position) from the other surface S2 side in the laminating direction. It is formed along the stacking direction.
The second connecting hole 142 is formed so as to penetrate the inside of the connecting protrusion 141 along the stacking direction (α direction).
The shape of the connecting protrusion 141 is a shape that fits closely into the connecting groove 131, and the length of the connecting protrusion 141 in the stacking direction is the same as the length of the connecting groove 131 in the stacking direction. Yes.

And each division | segmentation iron core laminated body 110 adjacent with respect to the circumferential direction has the division | segmentation core adjacent to the connection groove | channel 131 formed in the said division | segmentation iron core laminated body 110 in the edge part of one (left side) of the circumferential direction (C direction). The connection protrusion 141 of the stacked body 110 is tightly fitted, and the first connection hole 132 and the second connection hole 142 are in communication with each other.
At the other end (right side) in the circumferential direction (C direction), the connecting protrusion 141 formed on the split core laminate 110 is closely fitted in the connecting groove 131 of the adjacent split core stack 110. The first connection hole 132 and the second connection hole 142 are in communication with each other.

  In addition, the spring pin 120 is tightly inserted into the first connection hole 132 and the second connection hole 142 that are in communication.

  In this way, a plurality of divided core laminates 110 are arranged in a ring shape, and the divided core laminates 110 adjacent to each other in the circumferential direction are connected to each other at the end portions in the circumferential direction of the yoke portion 111, thereby forming an annular stator. A laminated iron core 100 is formed.

As described above, the adjacent divided core laminates 110 are connected to each other at the end portion in the circumferential direction of the yoke portion 111 with the connection groove 131 and the connection protrusion 141 being closely fitted and connected. The spring pin 120 is fitted in the first connection hole 132 and the second connection hole 142.
As a result, the connection between the divided core laminates 110 is strengthened, and the dimensional accuracy of the annular stator core formed in an annular shape is increased.

  The stator laminated core of the present invention can be used not only for a stator core of a rolling machine but also for a stator core of a generator.

DESCRIPTION OF SYMBOLS 100 Stator laminated core 110, 10 division | segmentation iron core laminated body 111, 11 Yoke part 112, 12 Teeth part 113, 13 hole 120 Spring pin 131 Connection groove 132 1st connection hole 141 Connection protrusion 142 2nd connection hole

Claims (2)

A plurality of divided core laminates which are integrally provided with a yoke portion extending in the circumferential direction and a teeth portion extending radially inward from the yoke portion are arranged in an annular shape, and adjacent divisions in the circumferential direction In the stator laminated core formed by connecting the core laminates to each other at the circumferential ends of the yoke portion,
In each split core laminate,
At one end in the circumferential direction of the yoke part,
A connecting groove formed along the stacking direction from one surface side in the stacking direction toward the other surface side in the stacking direction to a position in the middle of the stacking direction;
In a state communicating with the connection groove, a first connection hole formed along the stacking direction is provided from a position in the stacking direction to the other surface in the stacking direction,
At the other end in the circumferential direction of the yoke part,
It is formed along the laminating direction from one surface side in the laminating direction to the middle surface in the laminating direction from the other surface side in the laminating direction, and has a shape that fits closely into the connecting groove and in the laminating direction. A connecting protrusion having a length equal to the length of the connecting groove,
A second connecting hole formed in the connecting protrusion along the stacking direction is provided;
Each divided core laminate adjacent in the circumferential direction is
At one end in the circumferential direction, the connection protrusions of the adjacent divided core laminates are closely fitted in the connection grooves formed in the divided core laminate, and the first connection hole and the second connection hole Is in communication,
At the other end in the circumferential direction, a connection protrusion formed on the split core laminate is closely fitted in a connection groove of an adjacent split core stack, and the first connection hole and the second connection The hole is in communication,
A stator laminated iron core, wherein a spring pin is tightly inserted into the first connection hole and the second connection hole that are in communication with each other. In claim 1,
The connecting groove is a dovetail groove,
The fixed laminated iron core, wherein the connection protrusion has a shape that fits closely into the connection groove.

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