JPH0937522A - Apparatus and method for assembly of stator core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator core assembly apparatus and an assembly method by which respective partial cores are easily and accurately assembled into an annular core. SOLUTION: The protrusions C12 and recesses C22 of respective partial cores which are adjacent to each other are arranged into an annular shape in the inside of a tapered ring 2 so as to have the protrusions 12 and recesses C22 close to each other. A taper holder 3 is made to be descended and pressed with divided claws 4 to make the outside tapered surfaces 42 of the divided claws 4 slide along the inside tapered surface 21 of the tapered ring 2 and, further, to make the divided claws 4 slide along the tapered sliding surface 31 of a tapered holder 3. Thus, the respective claw members 41 of the divided claws 4 are moved toward the center axis uniformly and the inside surfaces 43 of the divided claws 4 are pressed against the outer circumference of a stator core C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling apparatus and method for assembling a partial core used in a motor stator into an annular stator core.

[0002]

2. Description of the Related Art Conventionally, a stator core is divided into a plurality of partial cores in the circumferential direction to facilitate insertion of a stator coil and to reduce the size of one machined part to improve the material yield. , There is a way to make the die smaller. That is, in order to join the divided partial cores to each other, as shown in FIG. 3B, the stator core A is divided into a plurality of partial cores C for each salient pole B around which the winding is wound, and one of the partial cores is divided. Protrusions C12 are provided on the mating surface C11 of the core C1, and the one partial core C is provided on the mating surface C11 of the other partial core C2.
By providing a recess C22 into which the first projection C12 can be fitted, as shown in FIG. 3A, the projection C12 and the recess C22 are fitted, and the partial cores are joined together to form an annular stator core. What is formed is disclosed (for example, Japanese Patent Application Laid-Open No. 61-124241). When joining such divided partial cores to form an annular stator core,
Each of the partial cores is arranged in an annular shape, and the metal band is wound in a state where the adjacent protrusions C12 and recesses C22 are close to each other,
The stator core is assembled by fitting the protrusion C12 and the recess C22 by tightening with a three-jaw chuck or the like used in a machine tool.

[0003]

However, in the above-mentioned prior art, when the number of divisions increases, the tightening is not performed uniformly,
There is a problem in that a certain accuracy cannot be ensured because biting occurs in a part of the fitting portion. In addition, when tightening with a chuck or the like, since one end of the stator core is tightened, the other end is not tightened sufficiently, and the other end needs to be tightened again, which causes a problem that it takes a lot of time and effort for assembly work. . . It is an object of the present invention to provide a stator core assembling apparatus and method for easily and accurately assembling each partial core into an annular shape.

[0004]

In order to solve the above-mentioned problems, according to the present invention, a stator core is circumferentially divided to form a plurality of partial cores, and the partial cores are fitted to the mating surfaces of the adjacent partial cores. In a stator core assembling apparatus in which a projection and a recess to be obtained are provided and the projection and the recess are fitted to each other to integrally mold the partial core in an annular shape, a base on which the stator core is placed with its axis centered in the vertical direction, and A taper ring having an inner diameter larger than the outer diameter of the stator core and having an inner taper surface with a large upper diameter on the inner circumference, and the shaft center of the taper ring provided above the taper ring, and A hollow taper holder that has a tapered sliding surface whose inner surface opens downward and can move up and down along the axis, and an outer surface that comes into surface contact with the tapered sliding surface so that it can slide in the axial direction. A split claw including a plurality of claw members, the inner side surface of which has substantially the same curvature as the outer peripheral surface of the stator core and has an outer tapered surface that makes surface contact with the inner tapered surface of the tapered ring. It is equipped with. Further, the taper holder is provided with a plurality of guide grooves penetrating along the axial direction on the side surface, and the claw member has an outer surface in surface contact with a taper sliding surface of the taper holder so as to be slidable in the axial direction, and The side surface is in surface contact with substantially the same curvature as the outer peripheral surface of the stator core, and an outer tapered surface is provided on the lower outer surface that is in surface contact with the inner tapered surface of the taper ring, and each claw member has a guide groove of the taper holder. A guide bolt that can slide inside is provided. Further, using the data core assembling apparatus, the protrusions and recesses of the respective partial cores adjacent to the inside of the taper ring are arranged in a ring shape, and the taper holder is lowered / pressurized together with the split claws to divide the split cores. The outer tapered surface of the claw is slid along the inner tapered surface of the taper ring, and the split claw is slid along the tapered sliding surface of the taper holder, so that each claw member of the split claw is evenly shafted. The inner surface of the split claw is pressed against the outer peripheral surface of the stator core by moving it toward the center.

[0005]

By the above means, the tapered holder is lowered together with the split claws, the outer circumference of the stator core is surrounded by the split claws, and the outer tapered surface of the split claws is brought into contact with the inner tapered surface. Furthermore,
When the taper holder is pressed downward, the outer tapered surface of the split claw slides on the inner tapered surface, the split claw slides along the taper sliding surface of the taper holder, and the guide bolt slides above the guide groove. To do. As a result, each claw member of the split claw moves evenly toward the axial center, and the inner surface presses the outer peripheral surface of the stator core, so that the adjacent protrusions and recesses of each partial core are evenly fitted, and the plurality of parts A stator core is formed by integrally joining the cores.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view showing an embodiment of the present invention. In the figure, reference numeral 1 denotes a base on which a stator core C is placed with its axis centered in the vertical direction. Reference numeral 2 denotes a taper ring, which has an inner diameter larger than the outer diameter of the stator core C, and has an inner taper surface 21 with a large upper diameter on the inner circumference and is fixed on the base 1. Reference numeral 3 denotes a hollow taper holder provided above the taper ring 2 so that the shaft center of the taper ring 2 and the shaft center of the taper holder 3 are aligned with each other so that the pressurizing device (not shown) can move up and down along the shaft center. The inner surface is opened downward, and a tapered sliding surface 31 having an inner diameter whose lower diameter is larger than its upper diameter is provided. Reference numeral 32 denotes a plurality of guide grooves that penetrate the side surface of the taper holder 3 along the axial direction. Reference numeral 4 denotes a split claw divided into a plurality of claw members 41. The outer side surface 42 is in surface contact with the taper sliding surface 31 of the taper holder 3 so as to be slidable in the axial direction, and the inner side surface 43 is the outer circumference of the stator core C. The surface C3 has a curvature substantially the same as that of the surface C3 and is in surface contact with the taper ring 2 on the lower outer surface.
An outer taper surface 44 is provided which is in surface contact with the inner taper surface 21. Each claw member 41 has a guide bolt 45.
Are provided, the guide bolts 45 slide in the guide grooves 32 of the taper holder 3, and the claw members 41 are arranged with a gap therebetween.

When assembling a plurality of divided partial cores into an integral stator core C, as shown in FIG. 3B, the protrusions C12 and the recesses C22 of adjacent partial cores are brought close to each other inside the taper ring 2. Arranged in a ring. on the other hand,
The split claw 4 is opened so that the inner diameter of the split claw 4 is larger than the outer diameter of the stator core C by lowering the guide bolt 45 to the lower end of the guide groove 32. Then, the pressing device lowers the split claws 4 together with the taper holder 3 to surround the outer circumference of the stator core C and bring the outer tapered surface 44 of the split claws 4 into contact with the inner tapered surface 21. Further, when the taper holder 3 is pressed downward by the pressurizing device, the outer tapered surface 44 of the split claw 4 slides on the inner tapered surface 21, and the outer surface 42 of the split claw 4 slides on the taper sliding surface 31 of the taper holder 3. The guide bolt 45 slides above the guide groove 32. As a result, as shown in FIG. 2, each claw member 41 of the split claw 4 moves uniformly toward the axial center, and the inner side surface 43 presses the outer peripheral surface C3 of the stator core C, so that the adjacent protrusions of each partial core are adjacent to each other. The portion C12 and the recess C22 are fitted,
The stator core C contracts to form a stator core C in which a plurality of partial cores are integrally coupled as shown in FIG.

[0008]

As described above, according to the present invention, the stator core is divided in the circumferential direction to form a plurality of partial cores, and the protrusions that can be fitted to the mating surfaces of the adjacent partial cores, respectively. Since a concave portion is provided and the protrusions and concave portions of the adjacent partial cores are brought close to each other and arranged in an annular shape, both end surfaces of the split claws arranged outside the stator core are pressed by the tapered holder and the tapered surface of the tapered ring.
The partial cores of the stator core uniformly contract toward the axial center. Therefore, the split claws uniformly tighten each partial core simply by processing and pressing from above while sliding the split claws on the inner surface of the taper holder. easily,
In addition, there is an effect that it is possible to provide a stator core assembling apparatus and method for accurately assembling in an annular shape.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a side sectional view showing a state in which the assembly of the embodiment of the present invention is completed.

FIG. 3A is a partial plan view showing a state where the stator core is assembled, and FIG. 3B is a partial plan view showing a state before assembly.

[Explanation of symbols]

1: base, 2: taper ring, 21: inner tapered surface,
3: taper holder, 31: taper sliding surface, 32: guide groove, 4: split claw, 41: claw member, 42: outer surface, 43:
Inner side surface, 44: outer tapered surface, 45: guide bolt,
C: stator core, C1, C2: partial core, C3: outer peripheral surface, C11, C21: mating surface, C12: protruding portion, C2
2: Recess

Claims (3)

[Claims] 1. A stator core is divided in the circumferential direction to form a plurality of partial cores, and projections and recesses that can be fitted to the mating surfaces of the adjacent partial cores are provided, and the projections and the recesses are formed. In a stator core assembling apparatus in which the partial cores are integrally molded in an annular shape by fitting, a base on which the stator core is placed with its axis oriented vertically, and an inner diameter larger than the outer diameter of the stator core provided on the base, A taper ring having an inner taper surface with a large diameter on the inner circumference, and a shaft provided above the taper ring and having a taper sliding surface with an axial center coinciding with the taper ring and an inner surface opening downward. A hollow taper holder that can move up and down along the center is in surface contact with the taper sliding surface so that the outer surface can slide in the axial direction, and the inner surface has almost the same curvature as the outer peripheral surface of the stator core. And a split claw composed of a plurality of claw members that are in surface contact with each other and have an outer tapered surface on the lower outer surface that is in surface contact with the inner tapered surface of the taper ring. 2. The taper holder is provided with a plurality of guide grooves penetrating along the axial direction on its side surface, and the claw member is in surface contact with its outer surface so as to be able to slide in the axial direction with the taper sliding surface of the taper holder. The inner surface of the stator core is in surface contact with substantially the same curvature as the outer surface of the stator core, and the lower outer surface is provided with an outer tapered surface that is in surface contact with the inner tapered surface of the taper ring. The stator core assembling apparatus according to claim 1, further comprising a guide bolt that can slide in the guide groove. 3. A stator core is divided in the circumferential direction to form a plurality of partial cores, and protrusions and recesses that can be fitted to the mating surfaces of the adjacent partial cores are provided. In a method of assembling a stator core in which the partial cores are integrally formed into an annular shape by fitting, a base on which the stator core is placed with its axis in the vertical direction, and an inner diameter larger than the outer diameter of the stator core provided on the base, A taper ring having an inner taper surface with a large upward diameter on the inner circumference, and a shaft provided above the taper ring and having a taper sliding surface whose axial center coincides with the taper ring and whose inner surface opens downward. A hollow taper holder that can move up and down along the center is in surface contact with the taper sliding surface so that the outer surface can slide in the axial direction, and the inner surface has almost the same curvature as the outer peripheral surface of the stator core. And a tapered claw member having a plurality of claw members provided with an outer tapered surface that makes a surface contact with the inner tapered surface of the taper ring on the lower outer surface of the taper ring. The protrusions and recesses of the respective partial cores that are respectively adjacent to the inside of the ring are arranged close to each other and arranged in an annular shape, and the tapered holder is lowered and pressed together with the split claw, and the outer tapered surface of the split claw is set to the inner tapered surface of the tapered ring. Along with sliding along
The split claws are slid along the taper sliding surface of the taper holder, the claw members of the split claws are evenly moved toward the axial center, and the inner surface of the split claw is pressed against the outer peripheral surface of the stator core. A method for assembling a stator core, comprising: 3. The taper holder is provided with a plurality of guide grooves penetrating in the side surface along the axial direction, and the claw member is in surface contact with the taper sliding surface of the taper holder so that the outer surface can slide in the axial direction. The inner side surface of the stator core is in surface contact with substantially the same curvature as the outer peripheral surface of the stator core, and the lower outer surface is provided with an outer tapered surface in surface contact with the inner tapered surface of the taper ring. The stator core assembling method according to claim 3, further comprising a guide bolt that can slide in the guide groove.