JPWO2014057544A1 - Rotating electric machine and manufacturing method thereof - Google Patents

Abstract

In the rotating electrical machine according to the present invention, the reaction force in the radially inner direction from the inclined surface generated by the fastening force of the bolt that fastens the divided core block to the boss in the axial direction for each divided core block is divided through the relay member. Since the core block is pressed against the outer peripheral surface of the housing, the manufacturing efficiency is greatly improved.

Description

  The present invention relates to a rotating electrical machine having a stator composed of divided core blocks in which a stator core is divided into a plurality of parts, and a method for manufacturing the same.

As a conventional abduction type electric motor, an electric motor having a stator core configured by connecting a plurality of divided core blocks to a connecting housing by connecting dovetails and connecting them together is known (for example, Patent Documents). 1).
In this case, the connecting housing is formed of a softer material than the laminated steel plate that is a component of the split core block, and the dovetail connecting portion on the connecting housing side is formed so that the connecting gap existing in the dovetail connecting is not filled. It is plastically deformed.

Japanese Patent Laying-Open No. 2003-169431 (paragraphs 0022 to 0024, FIG. 1)

However, in the electric motor having the above configuration, the convex portion of the coupling housing has a smaller circumferential width and radial height than the concave portion of the split core block, and the outer diameter of the coupling housing is smaller than the inner diameter of the stator core. The dimensions must be reduced, and each dimension management is troublesome.
Moreover, since it is necessary to plastically deform the connecting housing using, for example, a punch in a state where the split core block and the connecting housing are assembled, the dimensions of the connecting housing must be controlled in consideration of temperature rise and the like. There was a problem of being bad.

  An object of the present invention is to solve such problems, and it is easy to connect adjacent divided core blocks by using a fastening force of a fastening member for fastening the divided core block to a housing. It is an object of the present invention to obtain a rotating electrical machine that can be connected to the motor, and whose manufacturing efficiency is significantly improved, and a manufacturing method thereof.

The rotating electrical machine according to this invention is
A stator including a ring-shaped stator core having a plurality of teeth formed at intervals in the circumferential direction, and a stator winding in which a conductive wire is wound around each of the teeth;
A rotor provided rotatably around the stator on the outer diameter side of the stator;
A housing provided on the inner diameter side of the stator core in contact with the outer peripheral surface of the inner peripheral surface of the stator core;
The stator core is a rotating electrical machine composed of a divided core block divided into a plurality along the radial direction,
In each of the divided core blocks, a dovetail core block groove is formed along the axial direction on the outer peripheral surface side of the housing.
The housing is formed with a boss that protrudes radially outward and faces one end surface in the axial direction of the stator core and has a housing groove on the same axis as the core block groove,
The core block groove is fitted with a relay member having a tip surface in surface contact with the inclined surface of the housing groove,
The reaction force in the radially inner direction from the inclined surface generated by the fastening force of the fastening member that fastens the divided core block to the boss in the axial direction for each of the divided core blocks is transmitted through the relay member to each of the divided cores. A block is pressed against the outer peripheral surface of the housing.

The rotating electrical machine according to the present invention is
A stator including a ring-shaped stator core having a plurality of teeth formed at intervals in the circumferential direction, and a stator winding in which a conductive wire is wound around each of the teeth;
A rotor provided rotatably around the stator on the outer diameter side of the stator;
A housing provided on the inner diameter side of the stator core in contact with the outer peripheral surface of the inner peripheral surface of the stator core;
The stator core is a rotating electrical machine composed of a divided core block divided into a plurality along the radial direction,
In each of the divided core blocks, a dovetail core block groove is formed along the axial direction on the outer peripheral surface side of the housing.
The housing is formed with a boss that protrudes radially outward and faces one end surface in the axial direction of the stator core,
On the other end face side in the axial direction of the stator core, a pressing member having a pressing member groove on the coaxial line with the core block groove is provided,
In the core block groove, a relay member having a tip surface in surface contact with the inclined surface of the pressing member groove is inserted,
The reaction force in the radially inward direction from the inclined surface generated by the fastening force of the fastening member fastening the pressing member and the divided core block to the boss in the axial direction causes each divided core block to pass through the relay member. It presses against the outer peripheral surface of the housing.

Moreover, the manufacturing method of the rotating electrical machine according to the present invention includes:
Punching the material, forming a thin steel plate part that is a component of the split core block; and
Forming the split core block by laminating the thin steel plate portions;
After each divided core block is arranged around the housing to form a divided core block assembly, a ring-shaped tightening is performed so that each divided core block is pressed against the housing from the outer diameter side to the inner diameter side. Inserting the jig into the split core block assembly;
Connecting adjacent divided core blocks by welding;
Inserting the relay member into each of the core block grooves;
It has.

  According to the rotating electrical machine of the present invention, the adjacent divided core blocks can be easily connected by using the fastening force of the fastening member that fastens the divided core block to the housing, so that the manufacturing efficiency can be improved. Is greatly improved.

  Further, according to the method of manufacturing a rotating electrical machine according to the present invention, by inserting a ring-shaped fastening jig into the split core block assembly, the stator, and the rotor disposed on the outer diameter side of the stator, Can be easily made equal in the circumferential direction.

It is a block diagram which shows the elevator apparatus using the electric motor of Embodiment 1 of this invention. It is an upper half sectional view showing the hoisting machine of FIG. It is arrow sectional drawing along the III-III line | wire of FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is a figure which shows a mode that a coil part is wound around the division | segmentation core block of FIG. FIG. 4 is a cross-sectional view taken along line VI-VI in FIG. 3. It is sectional drawing which shows the 1st modification of the electric motor of Embodiment 1 of this invention. It is sectional drawing which shows the 2nd modification of the electric motor of Embodiment 1 of this invention. It is sectional drawing which shows the usage condition of the electric motor of FIG. It is a perspective view which shows the modification of the relay member of Embodiment 1 of this invention. It is principal part sectional drawing which shows the electric motor of Embodiment 2 of this invention. It is arrow sectional drawing along the XII-XII line | wire of FIG. It is sectional drawing which shows the modification of the electric motor of Embodiment 2 of this invention. It is principal part sectional drawing which shows the electric motor of Embodiment 3 of this invention. It is arrow sectional drawing along the XV-XV line | wire of FIG. It is principal part sectional drawing which shows the modification of Embodiment 3 of this invention. It is principal part sectional drawing which shows the electric motor of Embodiment 4 of this invention. It is arrow sectional drawing along the XVIII-XVIII line | wire of FIG. It is principal part sectional drawing which shows 1 process of the manufacturing method of the electric motor of Embodiment 1 of this invention. It is principal part sectional drawing which shows 1 process of the manufacturing method of the electric motor of Embodiment 3 of this invention. FIG. 3 is a layout view of the material of the thin steel plate portion of the first embodiment in the punching process. It is a figure which shows the lamination | stacking arrangement | positioning of the sheet steel plate part of Embodiment 1. FIG. It is arrow sectional drawing along the XXIII-XXIII line | wire of FIG. It is a layout view with the raw material of the thin steel plate part of an example different from the thin steel plate part of Embodiment 1 in a punching process. It is a figure which shows different arrangement | positioning of the thin-plate steel plate part of FIG. It is principal part sectional drawing when the thin steel plate part of plate | board thickness which each differs in the adjacent division | segmentation core block is laminated | stacked. It is principal part sectional drawing when the thin steel plate part of the same board thickness is laminated | stacked in the adjacent division | segmentation core block.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent members and parts will be described with the same reference numerals.
Embodiment 1 FIG.
FIG. 1 is a perspective view showing an elevator apparatus 2 using an electric motor 1 according to Embodiment 1 of the present invention.
The elevator apparatus 2 includes an electric motor 1, a sheave 3 and a hoisting machine 4 having a brake (not shown), a rope 5 wound around the sheave 3, and a car 6 attached to one end of the rope 5. And a counterweight 7 attached to the other end of the rope 5.

In the elevator apparatus 2, braking by the brake is released, the electric motor 1 is driven, and the sheave 3 rotates, so that the car 6 and the counterweight 7 are lifted and lowered in a slidable manner.
In addition, the car 6 and the counterweight 7 are stopped and held by cutting off the power to the electric motor 1 and driving the brake.

FIG. 2 is an upper half sectional view showing the hoisting machine 4 of FIG.
The electric motor 1 of the hoisting machine 4 includes a cylindrical outer frame 9, a fixed shaft 10 provided on the central axis, a housing 8 connecting the fixed shaft 10 and the outer frame 9, and an outer periphery of the housing 8. A stator 11 provided on the surface, and a rotor 12 rotatably provided around the stator 11 on the outer diameter side of the stator 11 are provided. Here, the outer frame 9, the fixed shaft 10, and the housing 8 are integrally formed.
The stator 11 includes a stator core 13 provided with an inner peripheral surface in contact with the outer peripheral surface of the housing 8 over the entire circumference, and a stator winding 14 wound around the stator core 13. Yes.
The rotor 12 includes a cylindrical rotor core 15 and a plurality of permanent magnets 16 fixed to the inner peripheral surface of the rotor core 15 at intervals in the circumferential direction.

  The brake 17 of the hoisting machine 4 is attached to the outer frame 9 and has a brake pad 18 facing the rotor core 15.

  The sheave 3 of the hoist 4 includes a boss 20 that is rotatably provided on a fixed shaft 10 via a bearing 19, and a rope groove 21 that extends in the axial direction from one side of the rotor core 15 and is formed on the outer circumferential surface. A rim 22 and a rib 23 connecting the rim 22 and the boss 20 are provided.

In the hoisting machine 4, a rotating magnetic field is generated in the stator 11 by energizing the stator winding 14, and the rotor 12 and the sheave 3 integrated with the rotor 12 are linked to the rotating magnetic field. Rotate.
On the other hand, in the brake 17, the energization to the stator winding 14 is interrupted, and at the same time, the brake pad 18 presses the outer peripheral surface of the rotor core 15 and the rotation of the rotor 12 stops.

3 is a cross-sectional view taken along line III-III of the stator 11 of FIG.
The stator core 13 of the stator 11 is configured by laminating thin steel plate portions in the axial direction.
The stator core 13 includes a ring-shaped core back 24 fixed to the housing 8, and teeth 25 protruding radially from the core back 24 at equal intervals in the circumferential direction. Each tooth 25 is provided with a coil portion 26, which is a component of the stator winding 14, around which a conducting wire is wound.
The stator core 13 includes a plurality of divided core blocks 27 that are divided for each tooth 25.
Each divided core block 27 is provided with a joint portion 28 that rotatably connects the divided core blocks 27 that are adjacent to one side in the circumferential direction on the inner peripheral side.
Each divided core block 27 is formed with a dovetail core block groove 29 that opens to the outer peripheral surface 43 side of the housing 8. A relay member 30 is fitted into the core block groove 29. On the outer diameter side of the core block groove 29, a bolt hole 31 through which a bolt as a fastening member passes is formed.

4 is a cross-sectional view taken along the line IV-IV of the joint portion 28 of FIG.
The divided core block 27 is configured by alternately laminating first thin steel plate portions 32 and second thin steel plate portions 33.
An uneven portion 34 is formed on the inner diameter side of the first thin steel plate portion 32 and on one side in the circumferential direction. Concave and convex portions 34 are also formed on the inner peripheral side of the second thin steel plate portion 33 and on the other side in the circumferential direction. The first thin steel plate portion 32 and the second thin steel plate portion 33 are laminated in the axial direction with the respective concave and convex portions 34 fitted therein.
The first thin steel plate portion 32 and the second thin steel plate portion 33 rotate around the uneven portion 34 of the joint portion 28.
Note that a plurality of the first thin steel plate portions 32 and the second thin steel plate portions 33 may be alternately stacked.

FIG. 5 is a diagram illustrating a state in which the coil portion 26 is wound around the divided core block 27 of FIG. 3.
At the time of winding, the divided core block 27 adjacent to the joint portion 28 is rotated, and the circumferential dimension of the slot 35 between the teeth 25 is enlarged.
Accordingly, it is easy to form the coil portion 26 by winding the conductive wire around the tooth 25 through the nozzle 36 which is a winding jig, and the high-density stator winding 14 is manufactured.

6 is a cross-sectional view taken along the line VI-VI of the split core block 27 of FIG.
The housing 8 is formed with a boss 37 projecting in the radially outward direction. The boss 37 faces an inner diameter portion on one side (opposite side of the sheave 3) of each divided core block 27. The boss 37 is formed with a housing groove 39 which is coaxial with the core block groove 29 of the divided core block 27 and has an inclined surface 38 on the back surface.
In the core block groove 29, the relay member 30 with the tip end face 40 inclined is fitted. The relay member 30 has a front end surface 40 in surface contact with the inclined surface 38 of the housing groove 39, and a surface opposite to the front end surface 40 in surface contact with the vertical surface 41 on the inner side of the core block groove 29. ing.
Further, a bolt 42, which is a fastening member whose tip is screwed to the boss 37 of the housing 8, passes through the bolt hole 31 of the split core block 27.

At this time, due to the fastening force in the axial direction of the bolt 42, a reaction force is generated in the direction of the arrow a on the inclined surface 38 of the housing groove 39. The component force of b) is acting.
Accordingly, since the relay member 30 is fitted in the dovetail core block groove 29, the component force acts as it is as a force for pressing the divided core block 27 against the outer peripheral surface 43 of the housing 8.

In FIG. 6, there is a gap 44 between the boss 37 and the split core block 27, and a thin annular spacer (not shown) is interposed in the gap 44 to eliminate the gap 44 as follows. Effects can be obtained.
That is, when the electric motor 1 is driven, a force acts on the split core block 27 in a direction opposite to the rotation direction of the rotor 12 as a reaction force against the torque acting in the rotation direction of the rotor 12. This reaction force is also supported by the boss 37 of the housing 8 via the spacer, so that the reaction force is dispersed, the reaction force acting on the relay member 30 is reduced, and the relay member 30 can be downsized. It becomes possible.

In this way, by using the fastening force of the bolt 42 and the relay member 30, each divided core block 27 of the stator core 13 of the outer rotation type electric motor 1 is urged in the inner diameter direction to the outer peripheral surface 43 of the housing 8. By fixing, the stator core 13 can be easily coupled to the housing 8, and the manufacturing efficiency is greatly improved as compared with the conventional one.
Further, a gap generated in the circumferential direction of the adjacent divided core block 27 is suppressed, and the performance of the electric motor 1 is ensured.
The stator 11 is fixed to the housing 8 with bolts 42, and the required fixing strength can be easily obtained by adjusting the fastening force of the bolts 42.

FIG. 7 is a cross-sectional view showing a first modification of electric motor 1 of the first embodiment.
In this modification, the core block groove 29 is formed over the entire length of the divided core block 27 in the axial direction. The relay member 30 is formed with a thin stepped portion 46 on the opposite side of the front end portion 40 with the center line C of the divided core block 27 as a boundary.
The core block groove 29 is formed in the axial direction so that the stepped portion 46 is in surface contact with the inner wall surface of the core block groove 29.

In the first modified example, similar to the electric motor 1 of FIG. 6, the relay member 30 has a component force in the radially inward direction generated in the direction of the arrow b, an action point of this component force, and the split core block 27. The product of the distance L from the center line C causes a first moment in the counterclockwise direction in FIG.
In response to the first moment, the step portion 46 of the relay member 30 receives a reaction force in the direction of the arrow c from the inner wall surface of the core block groove 29 and generates a second moment that cancels the first moment. .
Therefore, in this modification, the split core block 27 can be stably fixed to the housing 8, and the fastening workability of fastening using the bolts 42 is improved.

FIG. 8 is a cross-sectional view showing a second modification of electric motor 1 of the first embodiment.
In this modification, an elastic member 47 is interposed between the end surface of the relay member 30 opposite to the front end surface 40 and the vertical surface 41 on the back side of the core block groove 29.
In the case of the electric motor 1 of FIG. 6, the gap 44 between the boss 37 and the split core block 27 is determined by the overall length of the relay member 30, and the housing is in a state where the inner diameter portion of the split core block 27 is in surface contact with the boss 37. 8 is difficult to assemble the split core block 27.
On the other hand, in the second modification, the gap 44 caused by the variation in the axial direction of the relay member 30 can be absorbed by the elastic member 47 and the gap 44 does not occur. .
That is, by tightening the bolt 42, the split core block 27 can be brought close to the boss 37 of the housing 8 against the elastic force of the elastic member 47, and the gap 44 can be eliminated as shown in FIG. Are fastened to the housing 8 by bolts 42 in surface contact with the boss 37.
As a result, the reaction force against the split core block 27 generated by driving the electric motor 1 is also supported by the boss 37 of the housing 8 without interposing a spacer between the boss 37 and the split core block 27, and the reaction force is distributed accordingly. Accordingly, the reaction force acting on the relay member 30 is reduced, and the relay member 30 can be downsized.

In addition, although the front-end | tip part of each relay member 30 is each accommodated in each housing groove | channel 39, you may connect the some relay member 30 with the connection part 48, as shown in FIG. In this case, the connecting portion 48 is accommodated in the housing groove 39, and an inclined front end surface 49 that is in surface contact with the inclined surface 38 of the housing groove 39 is formed in the connecting portion 48.
Further, the connecting portion 48 may be a ring shape formed over the entire circumference.

Further, a part of the fastening force in the axial direction of the bolt 42 acts as a force in the inner diameter direction by interposing the relay member 30, and each divided core block 27 can be pressed and fixed to the outer peripheral surface 43 of the housing 8. Since it can do, the stator core which does not have the joint part 28 which connects adjacent division | segmentation core blocks 27 may be sufficient.
In this case, when winding the coil portion 26 by winding the conductive wire around each tooth 25, the winding work can be performed without being disturbed by the adjacent teeth 25 connected by the joint portion 28.

Embodiment 2. FIG.
11 is a sectional view (corresponding to FIG. 3) showing a main part of the electric motor 1 according to the second embodiment of the present invention, and FIG. 12 is a sectional view taken along the line XII-XII in FIG.
In this embodiment, each divided core block 27 is formed with a dovetail core block groove 29 over the entire length in the axial direction. Further, a hole 31 through which the bolt 42 passes is formed on the outer diameter side of the core block groove 29.
Between the divided core block 27 and the head of the bolt 42, a pressing member 50 is provided that extends in the circumferential direction up to a region corresponding to three teeth 25 in the circumferential direction.
The pressing member 50 is formed with a pressing member groove 52 which is coaxial with the core block groove 29 of the divided core block 27 and has an inclined surface 51 on the back surface and which is open to the outer peripheral surface 43 side. A bolt hole 53 through which the bolt 42 penetrates is formed on the outer diameter side of the pressing member groove 52.

  In the core block groove 29, the relay member 30 having the inclined front end surface 56 is fitted. The relay member 30 has a front end surface 56 in surface contact with the inclined surface 51 of the pressing member groove 52, and a vertical surface 54 opposite to the front end surface 56 is in surface contact with the inner diameter side portion of the peripheral side surface 55 of the boss 37. doing.

  The bolt 42 passes through the bolt hole 53 of the pressing member 50 and the bolt hole 31 of the split core block 27, and the tip end thereof is screwed to the boss 37 of the housing 8.

According to the electric motor 1 of this embodiment, the reaction force in the inner diameter direction indicated by the arrow b acts by the relay member 30 having the tip surface 56 with the fastening force by the bolt 42 inclined.
Since the relay member 30 is fitted in the dovetail core block groove 29, the reaction force is transmitted to the split core block 27 through the relay member 30, and the split core block 27 is pressed against the outer peripheral surface 43 of the housing 8. In addition, the gap generated in the circumferential direction between the divided core blocks 27 adjacent in the circumferential direction can be suppressed, and the performance of the electric motor 1 is improved.

Further, although the relay members 30 having the same axial length in the axial direction of each relay member 30 are arranged in units of the pressing member 50, different pressing members 50 use relay members 30 having different lengths. There is.
In such a case, the inclined surface 51 of each pressing member 50 is brought into contact with the inclined front end surface 56 of each relay member 30 in units of each pressing member 50, and the reaction force is applied to the outer periphery of the housing 8 through each relay member 30. Can communicate to surface 43.

In the case of the electric motor 1 of the first embodiment, the split core block 27 is not formed with the core block groove 29 having the same shape over the entire length in the axial direction.
On the other hand, according to the electric motor 1 of the second embodiment, the inclined surface 51 that is in surface contact with the front end surface 56 of the relay member 30 is formed in the pressing member groove 52 of the pressing member 50, and the divided core block 27. The dovetail-shaped core block groove 29 is formed over the entire length in the axial direction.
That is, the number of punching dies forming the thin steel plate portions 32 and 33 constituting the split core block 27 is smaller than the number of punching dies forming the thin steel plate portions of the split core block 27 of the first embodiment. The manufacturing cost is reduced and workability is improved.

The pressing member 50 may be used in each divided core block 27 unit, or when the total length in the axial direction of each relay member 30 is the same, the pressing members 50 are connected to form a ring shape. Good.
Further, by determining the total length of the relay member 30, one surface of the divided core block 27 can be brought into surface contact with the boss 37 and the other surface can be brought into surface contact with the pressing member 50.
Further, when a gap is generated between the boss 37 and the split core block 27 due to the total length of the relay member 30, an operator may bring the split core block 27 into surface contact with the boss 37 during assembly work. Good.
Further, the elastic member 47 shown in FIG. 8 may be interposed between the relay member 30 and the boss 37.
Moreover, you may make it connect the some relay member 30 using the connection part 48 shown in FIG.

FIG. 13 is a sectional view (corresponding to FIG. 12) showing a main part of a modification of the second embodiment.
In this modification, a housing groove 39 is formed in the inner diameter side portion of the boss 37 in the same manner as in the first embodiment.
That is, a housing groove 39 is formed which is coaxial with the core block groove 29 of the split core block 27 and has an inclined surface 38 on the back surface.
The relay member 30 received in the core block groove 29, the housing groove 39, and the pressing member groove 52 has a tip surface 56 that is in surface contact with the inclined surface 51 at one end, and is in surface contact with the inclined surface 38 at the other end. The base end face 64 is formed.

In this modified example, as in the first modified example (FIG. 7) of the first embodiment, due to the component force in the radially inner direction generated in the direction of the arrow b with the center line C of the divided core block 27 as a boundary. The first moment acting in the counterclockwise direction and the second moment acting in the clockwise direction due to the component force in the radially inward direction generated in the direction of the arrow c are canceled out.
Therefore, in this modification, the split core block 27 can be stably fixed to the housing 8, and the fastening workability of fastening using the bolts 42 is improved.

Embodiment 3 FIG.
14 is a sectional view (corresponding to FIG. 3) showing a main part of the electric motor 1 according to Embodiment 3 of the present invention, and FIG. 15 is a sectional view taken along the line XV-XV in FIG.
In this embodiment, dovetail-shaped core block grooves 29 are formed so as to straddle between the adjacent divided core blocks 27.
The depth of the core block groove 29 reaches the concavo-convex portion 34 of the joint portion 28, and the depth of the core block groove 29 extends to the middle of the divided core block 27 along the axial direction. Further, in each divided core block 27, a protrusion 57 is formed between the adjacent core block grooves 29 and on the inner side in the radial direction of the bolt hole 31 through which the bolt 42 passes.
The boss 37 of the housing 8 is formed with a housing groove 39 which is coaxial with the core block groove 29 and has an inclined surface 38 on the inner surface.
In the core block groove 29, the relay member 30 with the tip end surface 40 inclined is fitted. The relay member 30 has a front end surface 40 in surface contact with the inclined surface 38 of the housing groove 39 and a surface opposite to the front end surface 40 in surface contact with the vertical surface 41 on the inner side of the core block groove 29. Yes.
Other configurations are the same as those of the electric motor 1 of the first embodiment.

  In the electric motor 1 of this embodiment, a reaction force is generated in the direction of the arrow a on the inclined surface 38 of the housing groove 39 due to the fastening force in the axial direction of the bolt 42. The split core block 27 is pressed against the outer peripheral surface 43 of the housing 8 via the relay member 30 by the component force of (arrow b).

According to the electric motor 1 of this embodiment, the core block groove 29 is formed across the adjacent divided core blocks 27, and the relay member 30 is inserted into the core block groove 29.
Accordingly, when one split core block 27 rotates about the joint portion 28, the rotation is prevented by the two relay members 30 biased in the radially inward direction. In comparison, the adjacent divided core blocks 27 can be prevented from separating.
That is, the stator 11 is secured to the housing 8 and has a fixed strength between the adjacent divided core blocks 27 in the circumferential direction that is greater than that of the first embodiment.

FIG. 16 is a fragmentary cross-sectional view showing a modification of this embodiment.
In this modification, the joint portion 28 of the divided core block 27 is formed on the outer side in the radial direction than the core block groove 29.
In this modified example, unlike the one shown in FIG. 15, the joint portion 28 is formed in the entire area in the axial direction of the divided core block 27, so that the divided core block is wound during the winding process of winding the conductive wire around the teeth 25. Since 27 smoothly rotates around the joint portion 28, winding workability is improved.

Embodiment 4 FIG.
17 is a sectional view (corresponding to FIG. 11) showing a main part of the electric motor 1 according to Embodiment 4 of the present invention, and FIG. 18 is a sectional view taken along the line XVIII-XVIII in FIG.
In this embodiment, dovetail-shaped core block grooves 29 are formed so as to straddle between the adjacent divided core blocks 27.
The joint portion 28 of the split core block 27 is formed on the outer side in the radial direction than the core block groove 29.
Further, in each divided core block 27, a protrusion 57 is formed between the adjacent core block grooves 29 and on the inner side in the radial direction of the bolt hole 31 through which the bolt 42 passes.

Between the divided core block 27 and the head of the bolt 42, a pressing member 50 is provided that extends in the circumferential direction up to a region corresponding to three teeth 25 in the circumferential direction.
The pressing member 50 is formed with a pressing member groove 52 that is coaxial with the core block groove 29 of the divided core block 27 and has an inclined surface 51 on the back surface. A bolt hole 31 through which the bolt 42 passes is formed on the outer diameter side of the pressing member groove 52.

  In the core block groove 29, the relay member 30 with the tip end face 56 inclined is fitted. The relay member 30 has a tip surface 56 in surface contact with the inclined surface 51 of the pressing member groove 53, and a surface opposite to the tip surface 56 in surface contact with the inner diameter side portion of the peripheral side surface 55 of the boss 37. Yes.

  The bolt 42 passes through the bolt hole 53 of the pressing member 50 and the bolt hole 31 of the split core block 27, and the tip end thereof is screwed to the boss 37 of the housing 8.

  According to the electric motor 1 of this embodiment, the core block groove 29 is formed so as to straddle between the adjacent divided core blocks 27, and the relay member 30 is inserted into the dovetail core block groove 29. The same effects as those of the electric motor 1 of the third embodiment can be obtained.

  In addition, an inclined surface 51 that is in surface contact with the front end surface 56 of the relay member 30 is formed on the pressing member 50, and the split core block 27 is formed with a core block groove 29 having a dovetail cross section over the entire length. The effect similar to that of the electric motor 1 of the second embodiment can be obtained.

In addition, also in the electric motor 1 of this embodiment, the modification of Embodiment 2 shown in FIG. 13 is also applicable.
That is, a housing groove 39 having an inclined surface 38 on the inner surface of the boss 37 is formed on the inner diameter side of the boss 37, and in the relay member 30 fitted into the core block groove 29, the tip that makes surface contact with the inclined surface 38 at one end portion. By forming the surface 40 and forming the tip surface 56 in surface contact with the inclined surface 51 at the other end, the same effect as that of the modification of the second embodiment can be obtained.

Next, a method for manufacturing the electric motor 1 of the first embodiment will be described.
In this electric motor 1, each divided core block 27 is arranged around the housing 8 to form a divided core block assembly, and thereafter, as shown in FIG. 19, each divided core block 27 is moved from the outer diameter side to the inner diameter side. A ring 58 as a tightening jig is fitted into the divided core block assembly so as to press against the housing 8.
Next, the adjacent divided core blocks 27 are connected to each other by welding.
Thereafter, after removing the ring 58, the relay member 30 is inserted into each core block groove 29, and then the bolt 42 is inserted into the bolt hole 31 and screwed into the boss 37, whereby the stator core 13 is housed in the housing. Fasten to 8.
20 is a cross-sectional view of the main part showing one manufacturing process of the electric motor 1 shown in FIG. 16, and the manufacturing method is the same as that in FIG.
For example, a collet chuck may be used as the tightening jig instead of the ring.

In this embodiment, before the step of inserting the relay member 30 and the step of fastening the bolt 42, the step of inserting the ring 58 into the divided core block assembly is performed, and the outer peripheral surface of the stator core 13 is made into a perfect circle. Thus, the gap between the stator 11 and the rotor 12 arranged on the outer diameter side of the stator 11 can be easily equalized in the circumferential direction, and the pulsation of the rotational torque of the electric motor 1 can be reduced. it can.

By the way, as shown in FIG. 21, the thin steel plate portions 32 and 33 of the first embodiment are arranged on a material 59 which is a plate-like thin plate material.
The thin steel plate portions 32 and 33 are separated by punching the material 59 using a press die.
In the strip-shaped material 59 drawn in the direction of the arrow d from the roll plate, the first thin steel plate portion 32 and the second thin steel plate portion 33 are alternately formed along the direction of the arrow d. The first thin steel plate portion 32 and the second thin steel plate portion 33 are arranged in a row in the vertical direction with respect to the direction of the arrow d, and adjacent to each other and the core back portions 24A are in contact with each other.

The first thin steel plate portion 32 and the second thin steel plate portion 33 are alternately stacked via the concavo-convex portions 34, and the stator core 13 is manufactured in an arc shape as shown in FIG.
In FIG. 22, the first thin steel plate portion 32 indicated by a dotted line and the second thin steel plate portion 33 indicated by a solid line can be seen from FIG. 23 showing a cross-sectional view along the line XXIII-XXIII in FIG. Between the first thin steel plate portions 32 adjacent to each other in the circumferential direction and between the second thin steel plate portions 33 adjacent to each other in the circumferential direction, gaps 61 are generated.
The gap 61 is gradually increased along the radially outward direction.
Note that a plurality of the first thin steel plate portions 32 and the second thin steel plate portions 33 may be alternately stacked.

In the first thin steel plate portion 32 and the second thin steel plate portion 33, the joint portion 28 that adversely affects the magnetic path is located on the inner diameter side of the stator core 13 having a low magnetic flux density, that is, on the inner diameter side of the bolt hole 31. Thus, the adverse effect of the magnetic path by the joint portion 28 is suppressed.
Further, in order to increase the yield of the material 59, the first thin steel plate portion 32 and the second thin steel plate portion 33 arranged in a row are arranged in contact with each other at the core back portion 24A, but FIG. As shown in FIG. 3, the first thin steel plate portion 32 and the second thin steel plate portion 33 adjacent to each other in the circumferential direction generate gaps 61, respectively.
However, since the first thin steel plate portion 32 and the second thin steel plate portion 33 are stacked in contact with each other along the axial direction, an increase in the magnetic resistance of the stator core 13 due to the gap 61 is suppressed. .

In addition, in order not to produce the clearance gap 61 in the 1st thin steel plate part 32 and the 2nd thin steel plate part 33 adjacent to the circumferential direction, as shown in FIG. 24, the 1st thin steel plate part 32 is shown. And the 2nd thin steel plate part 33 should just be arrange | positioned.
That is, the stator core 13 without the gap 61 is formed by forming the joint portion 28 on the outer diameter side of the bolt hole 31.
However, in this case, the joint portion 28 that adversely affects the magnetic path is formed on the outer diameter side of the bolt hole 31 of the stator core 13 having a high magnetic flux density, and the first thin steel plate portion 32 and the second thin steel plate. A gap is formed on each inner diameter side of the portion 33, and the yield of the material 59 is worse than that in FIG. 21.

  In addition, even if it is the thin steel plate of the same shape without the joint part 28, it is also possible to manufacture the division | segmentation core back | bag without the clearance gap 61. FIG.

FIG. 25 is a different layout of the first thin steel plate portion 32 and the second thin steel plate portion 33 shown in FIG.
In this example, the inverted teeth portion 25A of the same first thin steel plate portion 32 is disposed between the tooth portions 25A of the adjacent first thin steel plate portions 32.
In this example, the yield of the thin steel plate material is improved as compared with that of FIG.

In the case of the thin steel plate portions 32 and 33 of FIGS. 21, 24 and 25, in the strip-shaped material 59 drawn out from the roll plate, the plate thickness along the material 59 width W direction perpendicular to the direction of the arrow d is It changes with increasing or decreasing gradually.
Therefore, between the one divided core block 27 on which the first thin steel plate portion 32 is laminated and the other divided core block 27 adjacent to the divided core block 27, the first thin steel plate portion 32 and the second thin plate. When the steel plate portion 33 is greatly different in the width W direction of the blank 59, as shown in FIG. 26, a step 62 is formed in the welded portion 63 in which adjacent divided core blocks 27 are welded in the axial direction. It will occur.
In this case, when the divided core blocks 27 are fixed to each other by welding and then fixed to the housing 8 with the bolts 42, a step 62 is generated in the welded portion 63, so that an excessive force is applied to the welded portion 63 and the welded portion 63. May be destroyed, and the fastening force of the bolt 42 may be reduced.

  For this, the same part in the width W direction of the material 59 in which the first thin steel plate part 32 and the second thin steel plate part 33 are punched out (the same thickness of the material 59) is used. Thus, the level difference 62 in the welded portion 63 where the adjacent divided core blocks 27 are welded to each other is reduced, and the fastening force of the bolt 42 can be prevented from being lowered.

  In each embodiment, the electric motor for the hoisting machine of the elevator apparatus has been described as the rotating electric machine. However, the present invention can also be applied to other electric motors for machine tools, for example. The present invention can also be applied to.

  DESCRIPTION OF SYMBOLS 1 Electric motor, 2 Elevator apparatus, 3 Sheaves, 4 hoisting machine, 5 rope, 6 cages, 7 Counterweight, 8 Housing, 9 Outer frame, 10 Fixed shaft, 12 Rotor, 13 Stator core, 14 Stator Winding, 15 rotor core, 16 permanent magnet, 17 brake, 18 brake pad, 19 bearing, 20 boss, 21 tie groove, 22 rim, 23 rib, 24 core back, 24A core back, 25 teeth, 25A teeth , 26 Coil portion, 27 Split core block, 28 Joint portion, 29 Core block groove, 30 Relay member, 31 Bolt hole, 32 First thin steel plate portion, 33 Second thin steel plate portion, 34 Uneven portion, 35 Slot, 36 nozzle, 37 boss, 38 inclined surface, 39 housing groove, 40 tip surface, 41 vertical surface, 42 bolt (fastening member) 43 outer peripheral surface, 44 gap, 46 stepped portion, 47 elastic member, 48 connecting portion, 49 distal end surface, 50 pressing member, 51 inclined surface, 52 pressing member groove, 53 bolt hole, 54 vertical surface, 55 peripheral side surface, 56 distal end Surface, 57 Projection, 58 Ring, 59 Material, 61 Gap, 62 Step, 63 Welded portion, 64 Base end surface.

Claims (13)

A stator including a ring-shaped stator core having a plurality of teeth formed at intervals in the circumferential direction, and a stator winding in which a conductive wire is wound around each of the teeth;
A rotor provided rotatably around the stator on the outer diameter side of the stator;
A housing provided on the inner diameter side of the stator core in contact with the outer peripheral surface of the inner peripheral surface of the stator core;
The stator core is a rotating electrical machine composed of a divided core block divided into a plurality along the radial direction,
In each of the divided core blocks, a dovetail core block groove is formed along the axial direction on the outer peripheral surface side of the housing.
The housing is formed with a boss that protrudes radially outward and faces one end surface in the axial direction of the stator core and has a housing groove on the same axis as the core block groove,
The core block groove is fitted with a relay member having a tip surface in surface contact with the inclined surface of the housing groove,
The reaction force in the radially inner direction from the inclined surface generated by the fastening force of the fastening member that fastens the divided core block to the boss in the axial direction for each of the divided core blocks is transmitted through the relay member to each of the divided cores. A rotating electrical machine characterized in that a block is pressed against the outer peripheral surface of the housing. The relay member is formed with a thin step portion on the opposite side to the tip surface with a center line extending in the vertical direction from the center of the split core block as an axis,
The rotating electrical machine according to claim 1, wherein the step portion receives a reaction force that suppresses a moment generated by the reaction force on the tip surface.   3. The rotation according to claim 1, wherein an elastic member that urges the relay member toward the inclined surface is provided on the back side of the core block groove opposite to the tip surface. 4. Electric.   The rotating electrical machine according to any one of claims 1 to 3, wherein the plurality of relay members are connected through a connecting portion that is housed in the housing groove. A stator including a ring-shaped stator core having a plurality of teeth formed at intervals in the circumferential direction, and a stator winding in which a conductive wire is wound around each of the teeth;
A rotor provided rotatably around the stator on the outer diameter side of the stator;
A housing provided on the inner diameter side of the stator core in contact with the outer peripheral surface of the inner peripheral surface of the stator core;
The stator core is a rotating electrical machine composed of a divided core block divided into a plurality along the radial direction,
In each of the divided core blocks, a dovetail core block groove is formed along the axial direction on the outer peripheral surface side of the housing.
The housing is formed with a boss that protrudes radially outward and faces one end surface in the axial direction of the stator core,
On the other end face side in the axial direction of the stator core, a pressing member having a pressing member groove on the coaxial line with the core block groove is provided,
In the core block groove, a relay member having a tip surface in surface contact with the inclined surface of the pressing member groove is inserted,
The reaction force in the radially inward direction from the inclined surface generated by the fastening force of the fastening member fastening the pressing member and the divided core block to the boss in the axial direction causes each divided core block to pass through the relay member. A rotating electrical machine characterized by pressing against the outer peripheral surface of the housing. The boss is formed with a housing groove having an inclined surface that is coaxial with the core block groove and in surface contact with a base end surface opposite to the distal end surface of the relay member.
The rotating electrical machine according to claim 5, wherein the base end surface receives a reaction force that suppresses a moment generated by the reaction force on the distal end surface.   The rotation according to claim 5 or 6, wherein an elastic member that urges the relay member toward the inclined surface side is provided on the back side of the core block groove on the opposite side to the tip surface. Electric.   The rotating electrical machine according to any one of claims 5 to 7, wherein the plurality of relay members are connected through a connecting portion that is accommodated in the pressing member groove.   The rotating electrical machine according to claim 1, wherein the core block groove is formed across the adjacent divided core blocks.   The rotating electrical machine according to any one of claims 1 to 9, wherein the boss and one end face in the axial direction of the stator core are in surface contact.   The rotating electrical machine according to any one of claims 1 to 10, wherein the rotating electrical machine is an electric motor for a hoisting machine of an elevator apparatus. A method of manufacturing a rotating electrical machine according to any one of claims 1 to 11,
Punching the material, forming a thin steel plate part that is a component of the split core block; and
Laminating each of the thin steel plate portions to form the split core block;
After each divided core block is arranged around the housing to form a divided core block assembly, a ring-shaped tightening is performed so that each divided core block is pressed against the housing from the outer diameter side to the inner diameter side. Inserting the jig into the split core block assembly;
Connecting adjacent divided core blocks by welding;
Inserting the relay member into each of the core block grooves;
The manufacturing method of the rotary electric machine characterized by the above-mentioned.   The method of manufacturing a rotating electrical machine according to claim 12, wherein each of the thin steel plate portions is formed by punching from a region where the thickness of the material is equal.

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