JP2015220847A - Split coil unit and armature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a split coil unit in which winding work of connection work between coils can be easily carried out.SOLUTION: A split coil unit includes: a split core body 4 in which a core yoke 4A is located outward in a radial direction of a stator core; an insulator 5 which is fitted to the split core body 4; and a coil 6 which is wound around the insulator 5 and connected to a pair of coil terminals 21N, 21U whose both ends are arranged in parallel to each other. The insulator 5 has a wound part 51 around which a coil 6 is wound and a pair of fitted parts 52C, 52D to which the coil terminals 21N, 21U are fitted, respectively, and the fitted part is arranged at the end adjacent to the core yoke 4A.

Description

  The present invention relates to a split coil unit and an armature including the split coil unit.

In construction machines and other machines, a rotary drive type electric motor or generator is used. An electric motor or the like includes an armature and a rotor. The armature has a stator core formed by laminating a plurality of steel plates. The stator core has a plurality of teeth portions arranged in a ring.
These teeth portions are provided with an insulator, and a coil is wound around the insulator.

As a conventional example of an armature, an annular stator core having a plurality of tooth portions, a plurality of insulators respectively attached to the plurality of tooth portions, a stator coil wound around the outer periphery of these insulators, and a plurality of There exists a technique (patent document 1) provided with the several bus bar which electrically connects a stator coil.
In the conventional example shown in Patent Document 1, a stator coil is wound around an insulator to form a cassette coil having a terminal portion, and this cassette coil is fitted to a teeth portion of a stator core. Then, three types of bus bars of U phase, V ancestor, and W phase are fitted into one bus bar housing body, and this bus bar housing body is attached to the insulator. The three types of bus bars are arranged so as to be arranged in a windmill shape, that is, such that the distance from the center of the ring of the stator core differs between one end and the other end.

As another conventional example of an armature, a plurality of split cores connected to each other to form an annular stator core, an insulator attached to these split cores, and a coil wound around the split core via the insulator There is a technology provided (Patent Document 2).
In the conventional example shown in Patent Document 2, a plurality of adjacent divided cores are connected to each other. The divided cores to which the coils are connected constitute a core segment through which an alternating current of the same phase among the three phases flows. The coil of the core segment is connected to the coil of the core segment facing each other across the central axis of the armature by a jumper.

JP 2009-100506 A JP 2011-176902 A

  In the conventional example shown in Patent Document 1, it is necessary to fit a plurality of cassette coils to the teeth of the stator core, which is complicated. And it is necessary to fit three kinds of bus bars into one bus bar container, and the arrangement position is also complicated. Therefore, the operation | work which connects the both ends of each bus bar and the edge part of a coil becomes complicated.

In the conventional example shown in Patent Document 2, it is necessary to connect a plurality of coils of the same core segment to each other. In addition, the core segment coils located on opposite sides of the central axis of the armature must also be connected by a jumper.
In the conventional examples shown in Patent Documents 1 and 2, the coil winding work and the coil connecting work are complicated, and the armature assembly work cannot be easily performed.

  The objective of this invention is providing the division | segmentation coil unit and armature which can perform the winding operation | work of a coil and the connection operation | work of coils easily.

  A split coil unit according to the present invention is a split coil unit that is used in a rotary drive type motor or an armature of a generator and is arranged in a plurality so as to be annular, and constitutes a part of an annular stator core. A split core main body having a core yoke portion positioned radially outward of the stator core; an insulator mounted on the split core main body; and a pair of coil terminals wound around the insulator and arranged at both ends thereof side by side. The insulator includes a wound portion around which the coil is wound and a pair of attached portions to which the coil terminals are respectively attached. The attached portion includes the core yoke. It arrange | positions at the edge part adjacent to a part, It is characterized by the above-mentioned.

  In the present invention, it is preferable that the attached portion is provided with a female screw member whose axial direction is along the axial direction of the stator core.

  In the armature of the present invention, a plurality of divided coil units having the above-described configuration are arranged in an annular shape, an annular bus plate portion is arranged so that the coil terminals are connected to these divided coil units, and the bus The plate portion is attached to the coil terminal with an attachment member.

  In this invention, it is preferable that the said attachment member is provided with the internal thread member integrally provided in the said to-be-attached part, and the external thread member screwed together in the said internal thread member.

  In this invention, it is preferable that the said internal thread member is provided in the said to-be-attached part in the axial direction along the axial direction of the said stator core.

  In this invention, it is preferable that the said board part for buses has a connection part overlapped with the said coil terminal.

  In the present invention, the plurality of divided coil units constitute a plurality of segments each of which a multiphase alternating current, which is a set of two or more alternating currents having different phases, flows, and the bus plate portion includes the plurality of segments. It is preferable that a plurality of ring plates are provided corresponding to segments through which alternating current of the same phase flows, and these ring plates are laminated with an insulating sheet interposed therebetween.

  In the present invention, the plurality of divided coil units constitute a first segment, a second segment, and a third segment through which a three-phase alternating current, in which three alternating currents of a U phase, a V phase, and a W phase are combined, flows, respectively. In the split coil unit constituting the first segment, the coil terminal is for U-phase and neutral point, and in the split coil unit constituting the second segment, the coil terminal is for V-phase and medium The split coil unit constituting the third segment is for the sex point, and the coil terminals are for the W phase and the neutral point, and the bus plate portion is configured to connect the coil terminals for the neutral point to each other. A neutral point ring plate to be connected, a U phase ring plate for connecting the U phase coil terminals, a V phase ring plate for connecting the V phase coil terminals, and the W phase W to connect the coil terminals of It is preferable to provide a use ring plate.

  In this invention, it is preferable that the said connection part protrudes in the radial direction outward from the outer periphery of the said board part for buses.

  In the present invention, the bus plate portion has an external terminal portion connected to the outside, and the external terminal portion is formed to project radially inward from an inner peripheral edge of the bus plate portion. It is preferable.

  In the present invention, it is preferable that the U-phase ring plate, the V-phase ring plate, and the W-phase ring plate have the same shape.

  In the present invention, it is preferable that a spacer is provided between at least one of the plurality of ring plates and the coil terminal.

In the split coil unit of the present invention, an insulator is attached to the split core body, and the coil is wound around the wound portion of the insulator. While attaching a pair of coil terminals to a pair of attachment parts of an insulator, a pair of coil terminals and both ends of a coil are connected, respectively.
The divided coil units assembled in this way are arranged in an annular shape inside a cylindrical casing, and predetermined coil terminals are connected to each other.
In the present invention, since the pair of attached portions are arranged at the end portions adjacent to the core yoke portion, the pair of coil terminals are also arranged side by side at the end portions adjacent to the core yoke portion. Wiring work between them becomes easy. In addition, since the coils are wound around the plurality of split core bodies via insulators, the coil winding operation is facilitated as compared with the case where the coils are directly wound around a plurality of locations of the annular stator core.
Furthermore, in the state completed as a split coil unit, the coil end portion does not protrude, and handling becomes easy. On the other hand, if the end of the coil protrudes, the coil may be deformed during handling, which hinders connection work in a later process.

Sectional drawing which shows the armature concerning one Embodiment of this invention. The top view of the said armature. The front view of the division | segmentation coil unit concerning one Embodiment of this invention. The top view of the division | segmentation coil unit which made only the coil a cross section. Sectional drawing which follows the VV line in FIG. The side view of an insulator. The front view of an insulator. The top view of the board part for buses. The side view of the board part for buses. The top view of the ring plate for neutral points. The top view of the ring plate for U phases, the ring plate for V phases, and the ring plate for W phases. (A)-(D) are the schematic explaining the procedure which attaches a some division | segmentation coil unit to a case. The top view which shows the state by which the some division | segmentation coil unit was attached to the case. The top view which shows the state which has arrange | positioned the ring plate for neutral points on the some division | segmentation coil unit. The top view which shows the state which installed the ring plate for U phases on the ring plate for neutral points. The top view which shows the state which has arrange | positioned the ring plate for V phase on the ring plate for U phases. The figure which shows the modification of this invention and corresponds to FIG. The figure which shows the modification of this invention and corresponds to FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show the entire armature of the present embodiment.
FIG. 1 shows a cross section of the armature of the present embodiment, and FIG. 2 shows a plane of the armature.
[Overall structure of armature]
1 and 2, the armature 1 of the present embodiment constitutes an electric motor together with the rotor L. The electric motor is, for example, mounted vertically on an upper swing body of an electric swing excavator and used as a drive source for the swing operation. The electric power generated as regenerative energy by the electric motor is stored in the capacitor together with the electric power generated by the generator. The rotor L has a shaft L2 whose upper and lower portions are supported by a bearing (not shown), and a rotor core L1 attached to an intermediate portion of the shaft L2. In addition, although the example output on both sides is shown in the figure, a configuration in which one of the upper and lower sides is output may be employed.

The armature 1 includes a cylindrical metal case 10, a plurality of divided coil units 2 arranged in a ring shape inside the case 10, and an annular bus plate portion arranged in these divided coil units 2. 3.
In the lower part of the case 10, a step part 10 </ b> A is formed along the circumferential direction at the inner peripheral lower part. A metal lower surface fixing ring 11 is fixed to the step portion 10A. The upper end portion and the lower end portion of the case 10 are each provided with a lid member (not shown) having a hole portion through which the shaft L2 is inserted.
In the present embodiment, the plurality of divided coil units 2 include a first segment 21, a second segment 22, and a third segment 23 through which a three-phase alternating current, in which three alternating currents of the U phase, the V phase, and the W phase are combined, flows. Configure.

The divided coil unit 2 constituting the first segment 21 has a U-phase coil terminal 21U and a neutral point coil terminal 21N.
The divided coil unit 2 constituting the second segment 22 includes a V-phase coil terminal 22V and a neutral point coil terminal 22N.
The divided coil unit 2 constituting the third segment 23 has a coil terminal 23W for W phase and a coil terminal 23N for neutral point.
An annular bus plate portion 3 is arranged so that these coil terminals 21N, 22N, 23N, 21U, 22V, and 23W are connected. Therefore, by arranging the annular bus plate portion 3, it is possible to establish electrical connection between the plurality of divided coil units 2, so that the coils are compared with each other as compared with the case where the plurality of bus bars are arranged in a windmill shape. Wiring work becomes easier.

[Overall configuration of split coil unit]
3 to 5 show the split coil unit 2.
1 to 5, the split coil unit 2 includes a split core body 4 formed by laminating a predetermined number of core sheets 40 made of electromagnetic steel plates, an insulator 5 attached to the split core body 4, and an insulator 5. And a coil 6 having both ends arranged in parallel with each other. In FIG. 4, hatching indicating a cross section of the coil 6 is omitted.
The split core main body 4 constitutes a stator core arranged concentrically with the case 10 in a state of being arranged on the inner periphery of the case 10. That is, each divided core body 4 constitutes a part of an annular stator core.
The split core body 4 has a core yoke portion 4A located on the radially outer side of the stator core and a teeth portion 4B located on the radially inner side from the center portion. The edge on the tip side of the tooth portion 4B is formed in an arc shape.

[Configuration of insulator]
The structure of the insulator 5 is shown in FIGS.
3 to 7, the insulator 5 is attached to the tooth portion 4B of the split core body 4 and covers the tooth portion 4B except for the tip.
Such an insulator 5 is formed of an insulating material such as synthetic resin, and electrically insulates the split core body 4 and the coil 6 from each other.
The insulator 5 includes a wound part 51 around which the coil 6 is wound, and a box part 52 provided integrally with the wound part 51, and these are divided into two in the stacking direction of the core sheet 40. (See FIG. 6 and FIG. 7).
The box portion 52 is disposed at an end portion adjacent to the core yoke portion 4 </ b> A of the split core body 4, that is, at the back side end portion of the wound portion 51. Moreover, the box part 52 is arrange | positioned in the position which overlaps with 4 A of core yoke parts by planar view (refer FIG. 4).
The wound part 51 is formed in a rectangular tube shape.
The outer peripheral surface of the wound part 51 is an area around which the coil 6 is wound. The internal space of the wound part 51 is an area into which the tooth part 4B is inserted.

In FIG. 5, when the divided coil unit 2 constitutes the first segment 21, the box portion 52 includes a coil locking portion 52 </ b> A for locking one end portion 6 </ b> A of the coil 6 and the other end portion of the coil 6. It has a coil locking part 52B for locking 6B and a pair of attached parts 52C, 52D to which a pair of coil terminals 21N, 21U are attached. The attached portion 52C is a recess formed in the box portion 52 in order to attach the coil terminal 21N. The attached portion 52D is a recess formed in the box portion 52 in order to attach the coil terminal 21U. These attached portions 52C and 52D are located adjacent to the core yoke portion 4A (see FIG. 4). In other words, the attached portions 52C and 52D are disposed at positions overlapping the core yoke portion 4A in plan view.
The coil locking portion 52A is a concave portion that is a wall surface on the wound portion 51 side of the box portion 52 and opens upward in FIGS. The depth of the recess corresponds to the position of the outer peripheral portion of the coil 6 in order to lock the outer end 6 </ b> A of the coil 6. The attached portion 52C is adjacent to the coil locking portion 52A. The coil terminal 21N attached to the attached portion 52C and the one end 6A of the coil 6 are joined by welding.
The coil locking portion 52B is a concave portion that is a wall surface on the wound portion 51 side of the box portion 52 and opens on the upper side in FIGS. The depth of the concave portion corresponds to the position of the inner peripheral portion of the coil 6 in order to lock the end portion 6B on the inner peripheral side of the coil 6. The coil terminal 21U attached to the attached portion 52D and the other end 6B of the coil 6 are joined by welding.

The coil terminal 21N is an L-shaped metal fitting, and the bus plate portion 3 is supported by one side portion 21A thereof. An insertion hole 210 is formed in the center of the one side portion 21A. The female screw member 71 is integrally provided on the back surface of the one side portion 21A so that the insertion hole 210 of the coil terminal 21N corresponds to the inner periphery. The female screw member 71 is embedded in the box portion 52.
Similarly to the coil terminal 21N, the coil terminal 21U is an L-shaped metal fitting having one side portion 21A formed with the insertion hole 210 at the center. The female screw member 71 is provided on the back surface of the one side portion 21A so that the inner periphery corresponds to the insertion hole 210. The female screw member 71 is embedded in the box portion 52.

4 and 5, when the split coil unit 2 constitutes the second segment 22, the box portion 52 is attached with the above-described coil locking portions 52A and 52B and a pair of coil terminals 22N and 22V. And a pair of attached portions 52C and 52D.
The coil terminal 22N has the same structure as the coil terminal 21N, and the coil terminal 22V has the same structure as the coil terminal 21U.
When the split coil unit 2 constitutes the third segment 23, the box portion 52 has a pair of attached portions 52C to which the above-described coil locking portions 52A and 52B and a pair of coil terminals 23N and 23W are attached. , 52D.
The coil terminal 23N has the same structure as the coil terminal 21N, and the coil terminal 23W has the same structure as the coil terminal 21U.

[Configuration of bus plate]
A specific configuration of the bus plate portion 3 is shown in FIGS.
2, 8, and 9 show the overall configuration of the bus plate portion 3.
In these drawings, the bus plate portion 3 connects the metal neutral point ring plate 3N for connecting the neutral point coil terminals 21N, 22N, 23N to each other and the U phase coil terminal 21U. The metal U-phase ring plate 3U, the metal V-phase ring plate 3V for connecting the V-phase coil terminals 22V, and the metal W-phase for connecting the W-phase coil terminals 23W to each other Ring plate 3W. The U-phase ring plate 3U, the V-phase ring plate 3V, and the W-phase ring plate 3W have the same shape, thereby reducing the number of parts and reducing the manufacturing cost of the armature. .

The neutral point ring plate 3 </ b> N is disposed closest to the split coil unit 2. An insulating sheet 3S is disposed between the neutral point ring plate 3N and the split coil unit 2.
A U-phase ring plate 3U is disposed on a neutral point ring plate 3N via a ring-shaped insulating sheet 3S. A V-phase ring plate 3V is arranged on the U-phase ring plate 3U via a ring-shaped insulating sheet 3S. A W-phase ring plate 3W is disposed on the V-phase ring plate 3V via a ring-shaped insulating sheet 3S. As described above, the bus plate portion 3 includes a plurality of ring plates arranged corresponding to the segments through which the same-phase alternating current flows among the plurality of segments, and the insulating sheet 3S is interposed between the ring plates. Therefore, the assembly work of the armature used for polyphase alternating current can be performed easily. In particular, in this embodiment, the bus plate portion 3 is provided with a neutral point ring plate 3N, a U-phase ring plate 3U, a V-phase ring plate 3V, and a W-phase ring plate 3W, and is insulated between them. Since it is configured by laminating via the sheet 3S, it is possible to easily perform the assembly work of the armature used for the three-phase alternating current that combines the three alternating currents of the U phase, the V phase, and the W phase. .

FIG. 10 shows a neutral point ring plate 3N.
8 and 10, the neutral point ring plate 3N includes a ring main body 3N1 and a plurality of connection portions 3N2 formed to project radially outward from the outer peripheral edge of the ring main body 3N1.
These connecting portions 3N2 are formed to be inclined at a predetermined angle with respect to the radial direction of the ring body 3N1.
The connecting portion 3N2 is overlapped with the coil terminals 21N, 22N, and 23N of the plurality of divided coil units 2. An insertion hole 300 is formed in the central portion of these connection portions 3N2. The insertion hole 300 and the insertion hole 210 of the coil terminals 21N, 22N, and 23N coincide with each other, and the male screw member 72 is provided on the back surface of the coil terminals 21N, 22N, and 23N through the insertion holes 300 and 210. The female screw member 71 is screwed (see FIG. 5).

FIG. 11 shows a U-phase ring plate 3U.
2, 8, and 11, the U-phase ring plate 3 </ b> U includes a ring main body 3 </ b> M <b> 1, a plurality of connection portions 3 </ b> M <b> 2 that protrude radially outward from the outer peripheral edge of the ring main body 3 </ b> M <b> 1, and the ring main body 3 </ b> M <b> 1. And one external terminal portion 3M3 formed so as to protrude radially inward from the inner peripheral edge. As described above, since the connection portions 3M2 and 3N2 are formed so as to protrude radially outward from the outer peripheral edge of the bus plate portion 3, the connection portions 3M2 and 3N2 and the coil are less likely to interfere with each other. And a pair of coil terminals 21N, 22N, 23N, 21U, 2V, and 23W can be easily connected. Since the external terminal portion 3M3 is formed by projecting inward in the radial direction from the inner peripheral edge of the bus plate portion 3, the connection portions 3M2, 3N2 and the external terminal portion 3M3 are separated from each other in the radial direction. In connection work, mistakes are reduced. In addition, since the bus plate portion 3 is formed on the same plane, the bus plate portion 3 can be easily processed.

These connecting portions 3M2 are formed to be inclined at a predetermined angle with respect to the radial direction of the ring main body 3M1, opposite to the inclination direction of the connecting portion 3N2 in the neutral point ring plate 3N.
The connecting portion 3M2 is overlapped with the coil terminals 21U of the plurality of divided coil units 2. An insertion hole 300 is formed in the central portion of these connection portions 3M2. The insertion hole 300 and the insertion hole 210 of the coil terminal 21U coincide with each other, and the male screw member 72 is screwed into the female screw member 71 provided on the back surface of the coil terminal 21U through the insertion holes 300 and 210. (See FIG. 5).
The external terminal portion 3M3 has an attachment hole 301 formed at the center, and is connected to the outside through the electric wire C connected to the attachment hole 301 (see FIGS. 1 and 8).

The V-phase ring plate 3V includes a ring body 3M1, a connection portion 3M2, and an external terminal portion 3M3.
When arranged inside the case 10, the V-phase ring plate 3V is arranged such that the center angle is deviated from the U-phase ring plate 3U by a predetermined angle (see FIGS. 2 and 8).
The connection portion 3M2 of the V-phase ring plate 3V is attached by a male screw member 72 in a state of being overlapped with the coil terminals 22V of the plurality of split coil units 2 (see FIG. 5).

The W-phase ring plate 3W includes a ring body 3M1, a connection portion 3M2, and an external terminal portion 3M3.
When arranged inside the case 10, the W-phase ring plate 3W is arranged such that the center angle is deviated from the U-phase ring plate 3U and the V-phase ring plate 3V by a predetermined angle (see FIGS. 2 and 8). ).
The connecting portion 3M2 of the W-phase ring plate 3W is attached by a male screw member 72 in a state of being overlapped with the coil terminals 23W of the plurality of split coil units 2 (see FIG. 5).
As described above, the bus plate portion 3 includes the connection portions 3M2 and 3N2 overlapped with the coil terminals 21N, 22N, 23N, 21U, 22V, and 23W, so that the bus plate portion 3 includes the pair of coil terminals 21N, 22N, Even if they are arranged slightly deviated from 23N, 21U, 22V, and 23W, the connection between them can be secured.

Here, in the present embodiment, an attachment member 70 is provided that includes the female screw member 71 and the male screw member 72 and attaches the bus plate portion 3 to the pair of coil terminals 21N, 22N, 23N, 21U, 22V, and 23W. . Therefore, after the annular bus plate portion 3 is arranged on the pair of coil terminals 21N, 22N, 23N, 21U, 22V, and 23W arranged in an annular shape, the male screw member 72 is provided on the attached portions 52C and 52D. When screwed into the female screw member 71, the bus plate portion 3 is sandwiched between the male screw member 72 and the female screw member 71, and the bus plate portion 3 is connected to the pair of coil terminals 21N, 22N, 23N, 21U, It does not deviate from 22V and 23W. Therefore, connection work to the pair of coil terminals 21N, 22N, 23N, 21U, 22V, and 23W of the bus plate portion 3 is facilitated.
The male screw member 72 is provided on the mounted portions 52C and 52D along the axial direction of the stator core whose axial direction is annular, that is, the axial direction of the rotor L. Therefore, it is possible to perform an operation of approaching from above the insulator 5 and screwing the male screw member 72 into the attached portions 52C and 52D, and the workability is good. On the other hand, in the conventional example of Patent Document 1, since the coil terminal and the bus bar terminal are connected along the radial direction of the stator core, this connection work must be approached from inside and outside the stator core. The nature is bad.

The outer peripheral position of the insulating sheet 3 </ b> S is on the inner side than the position of the insertion hole 300 of the connecting portion 3 </ b> M <b> 2, and the inner peripheral position is on the outer side of the position of the attachment hole 301.
In the present embodiment, the U-phase ring plate 3U, the V-phase ring plate 3V, and the W-phase ring plate 3W are stacked with the insulating sheet 3S interposed therebetween. A step in the motor axial direction occurs between the ring plate 3U for use and the farthest W-phase ring plate 3W. In order to eliminate this step, a plurality of types of divided coil units 2 in which the attachment positions of the coil terminals 21U, 22V, and 23W are changed may be prepared. However, this increases the number of parts of the divided coil unit 2. become. Therefore, in this embodiment, the mounting positions of the coil terminals 21U, 22V, and 23W are the same in all the divided coil units 2, and the metal spacer 302 for eliminating the step is used for the U-phase ring plate 3U and the V-phase. It may be used between the ring plate 3V and the W-phase ring plate 3W (see FIGS. 8 and 9). By providing the spacer 302, when a plurality of ring plates are stacked, there is no gap between the pair of coil terminals 21N, 22N, 23N, 21U, 22V, and 23W and the ring plate. , 22N, 23N, 21U, 22V, 23W, there is no step in the motor axial direction, and the mounting work of the bus plate 3 to the pair of coil terminals 21N, 22N, 23N, 21U, 22V, 23W is easy. It becomes.

[Method of manufacturing armature]
Next, a method for manufacturing the armature 1 according to the present embodiment will be described with reference to FIGS.
First, the process of attaching the split coil unit 2 to the case 10 will be described with reference to FIG.
In FIG. 12A, first, the inner diameter positioning jig 13 is assembled. The inner diameter positioning jig 13 includes two semi-cylindrical members 13A and a pair of upper and lower disks 13B that connect upper end portions and lower end portions of these semi-cylindrical members 13A. Each of the two semi-cylindrical members 13A is formed in a bowl shape, and its outer peripheral surface abuts on the arcuate tip portion of the tooth portion 4B of the split coil unit 2 (see FIG. 12D), and a flat plate surface They face each other. The disc 13B is fixed to the upper end surface and the lower end surface of the semi-cylindrical member 13A with bolts.
A plurality of pre-manufactured divided coil units 2 are arranged around the semi-cylindrical member 13A so as to form an annular shape.

As shown in FIG. 12B, when a plurality of divided coil units 2 are arranged on the outer peripheral surface of the inner diameter positioning jig 13, the lower surface fixing ring 11 is arranged on the lower end surface, and the upper surface fixing ring 12 is arranged on the upper end surface. Then, the lower surface fixing ring 11 and the upper surface fixing ring 12 are temporarily fixed with the long bolt B, and the assembly A is assembled. The long bolt B is inserted into a hole formed in the upper surface fixing ring 12 and screwed into a female screw provided in the lower surface fixing ring 11.
The outer periphery of the assembly A temporarily fixed by the lower surface fixing ring 11, the upper surface fixing ring 12, and the long bolt B is covered with a roll plate (not shown) and tightened with a clamp bolt (not shown). After tightening with the clamp bolt, the long bolt B is further tightened, and the plurality of split coil units 2 are firmly fixed by the lower surface fixing ring 11 and the upper surface fixing ring 12. Thereafter, the roll plate is removed.
As shown in FIG. 12C, the assembly A is housed in the case 10 heated in advance. FIG. 12D shows a plan view in a state where the assembly A is housed inside the case 10. In FIG. 12D, the upper surface fixing ring 12 and the long bolt B are not shown.
Thereafter, the disc 13B is removed from the semi-cylindrical member 13A, and the semi-cylindrical member 13A is removed from the plurality of divided coil units 2 arranged in an annular shape.

The case 10 is cooled by a cooling device (not shown). An example of the cooling device is a cooling ring in which a flow path through which a refrigerant flows is formed.
Thereafter, the upper surface fixing ring 12 is removed from the case 10. Note that the lower surface fixing ring 11 remains inside the case 10.

Next, a method of installing the bus plate portion 3 on the plurality of divided coil units 2 will be described with reference to FIGS. 2 and 13 to 16. In FIG. 13 to FIG. 16, the one side portion 21A is not shown in the coil terminals 21N, 22N, 23N, 21U, 22V, and 23W.
First, FIG. 13 shows a state where the inner diameter positioning jig 13 and the upper surface fixing ring 12 are removed from the case 10. In this state, the front ends of the plurality of divided coil units 2 are positioned on a continuous virtual circle with the center of the case 10 as the center of the circle.
Thereafter, as shown in FIG. 14, the connection portion 3N2 of the neutral point ring plate 3N is attached to the coil terminals 21N, 22N, and 23N of the plurality of split coil units 2. Therefore, the male screw member 72 is screwed into a female screw member 71 (see FIG. 13) provided integrally with the coil terminals 21N, 22N, and 23N. An insulating sheet (not shown) is interposed between the neutral point ring plate 3N and the split coil unit 2 in order to prevent electrical contact between the coil 6 and the neutral point ring plate 3N. .

Further, as shown in FIG. 15, an insulating sheet 3S is disposed on the neutral point ring plate 3N, and a U-phase ring plate 3U is disposed on the insulating sheet 3S. Then, the connection portion 3M2 of the U-phase ring plate 3U is attached to the coil terminal 21U with the male screw member 72.
Next, as shown in FIG. 16, the insulating sheet 3S is disposed on the U-phase ring plate 3U, and the V-phase ring plate 3V is disposed on the insulating sheet 3S. Then, the connecting portion 3M2 of the V-phase ring plate 3V is attached to the coil terminal 22V with the male screw member 72.
Further, as shown in FIG. 2, an insulating sheet 3S is disposed on the V-phase ring plate 3V, and a W-phase ring plate 3W is disposed on the insulating sheet 3S. Then, the connection portion 3M2 of the W-phase ring plate 3W is attached to the coil terminal 23W with the male screw member 72.
Thus, the rotor L is mounted on the manufactured armature 1 and the lid member is attached to the case 10 to manufacture the electric motor.

  The split coil unit 2 having the above configuration includes the split core main body 4 in which the core yoke portion 4A is positioned on the radially outer side of the stator core, the insulator 5 attached to the split core main body 4, and the both ends of the insulator 5 wound around the insulator 5. A coil 6 connected to a pair of coil terminals 21N, 22N, 23N, 21U, 22V, and 23W that are arranged side by side, and the insulator 5 includes a wound portion 51 around which the coil 6 is wound, The pair of coil terminals 21N, 22N, 23N, 21U, 22V, and 23W have a pair of attached portions 52C and 52D, respectively. The insulator 5 is adjacent to the core yoke portion 4A. Placed at the end. Therefore, the pair of coil terminals 21N, 22N, 23N, 21U, 22V, and 23W are also arranged side by side at the end adjacent to the core yoke portion 4A, and the connection work between different coils becomes easy.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above embodiment, the ring body 3M1, the connection portion 3M2, and the external terminal portion 3M3 are integrally formed on the same plane. However, in the present invention, as shown in FIGS. 17 and 18, the ring body 3M1 is formed. The connecting portion 3M2 may be integrally formed, and the external terminal portion 3M4 may be a separate member.
17 and 18, the external terminal portion 3M4 is an L-shaped metal fitting, one piece of which is provided with a mounting hole 301, and the other piece is attached to one connecting portion 3M2. Here, in the W-phase ring plate 3W, the external terminal portion 3M4 is directly joined. However, in the V-phase ring plate 3V and the U-phase ring plate 3U, the external terminal portion 3M4 is avoided so as to avoid the insulating sheet 3S. Are joined. When the W-phase ring plate 3W, the V-phase ring plate 3V, and the U-phase ring plate 3U are attached, the connecting portion 3M2 is fastened together by the male screw member 72.
In this configuration, since the external terminal portion 3M4 is not formed so as to protrude from the inner periphery of the ring body 3M1, interference with the coil 6 can be prevented. In V-phase ring plate 3V and U-phase ring plate 3U, ring main body 3M1 and external terminal portion 3M4 are electrically connected.

In the above embodiment, the female screw member 71 is integrally attached to the back surface of the one side portion 21A of the coil terminals 21N, 22N, 23N, 21U, 22V, and 23W. However, in the present invention, the insulator 5 is formed from a hard material. If so, in order to omit the female screw member 71, a female screw portion may be formed directly on the pair of attached portions 52C and 52D.
In the embodiment, the bus plate portion 3 is interposed between the neutral point ring plate 3N, the U-phase ring plate 3U, the V-phase ring plate 3V, the W-phase ring plate 3W, and between them. Although the insulating sheet 3S is configured separately, in the present invention, these may be integrated in advance.

Furthermore, in the present invention, a plurality of divided coil units 2 may be configured by a first segment and a second segment through which two-phase alternating currents, each consisting of two alternating currents, flow.
Moreover, in this invention, it is not limited to what connects the split coil unit 2 in parallel, It is applicable also to what connects in series.

  INDUSTRIAL APPLICABILITY The present invention can be used for a rotary drive type motor or generator in construction machines and other machines.

  DESCRIPTION OF SYMBOLS 1 ... Armature, 2 ... Split coil unit, 3 ... Bus board part, 3N ... Neutral point ring board, 3U ... U-phase ring board, 3V ... V-phase ring board, 3W ... W-phase ring board 3 ... Insulating sheet, 4 ... Split core body, 4A ... Core yoke part, 5 ... Insulator, 6 ... Coil, 10 ... Case, 21 ... First segment, 22 ... Second segment, 23 ... Third segment, 21N, 22N , 23N, 21U, 22V, 23W ... Coil terminal, 51 ... Wound portion, 52 ... Box portion, 52C, 52D ... Mounted portion, 70 ... Mounting member, 71 ... Female screw member, 72 ... Male screw member, 302 ... Spacer

Claims (12)

A split coil unit in which a plurality of coils are arranged side by side to be used in a rotary drive type motor or an armature of a generator,
A split core body that constitutes a part of an annular stator core and in which a core yoke portion is positioned radially outward of the stator core;
An insulator attached to the split core body;
A coil wound around the insulator and connected to a pair of coil terminals arranged at both ends thereof, and
The insulator has a wound portion around which the coil is wound and a pair of attached portions to which the coil terminals are respectively attached, and the attached portion is disposed at an end adjacent to the core yoke portion. A split coil unit characterized by The split coil unit according to claim 1,
The split coil unit according to claim 1, wherein a female screw member is provided in the attached portion along an axial direction of the stator core. A plurality of the split coil units according to claim 1 are arranged so as to form an annular shape, an annular bus plate portion is arranged so that the coil terminals are connected to these divided coil units, and the bus plate portion is attached. An armature that is attached to the coil terminal with a member. The armature according to claim 3,
The armature, wherein the mounting member includes a female screw member provided integrally with the mounted portion, and a male screw member screwed into the female screw member. The armature according to claim 4,
The armature, wherein the female screw member is provided in the mounted portion in an axial direction along the axial direction of the stator core. The armature according to any one of claims 3 to 5,
The said board part for buses has a connection part overlapped with the said coil terminal. The armature characterized by the above-mentioned. The armature according to any one of claims 3 to 6,
The plurality of split coil units arranged constitute a plurality of segments each of which a multi-phase alternating current that is a set of two or more alternating currents with different phases flows,
The bus plate portion includes a plurality of ring plates arranged corresponding to the segments through which the same phase alternating current flows among the plurality of segments,
These ring plates are laminated via an insulating sheet between them. The armature according to claim 7,
The plurality of divided coil units constitute a first segment, a second segment, and a third segment through which a three-phase alternating current, in which three alternating currents of a U phase, a V phase, and a W phase are combined, flows. In the divided coil unit constituting one segment, the coil terminal is for U phase and neutral point, and in the divided coil unit constituting the second segment, the coil terminal is for V phase and neutral point. Yes, in the split coil unit constituting the third segment, the coil terminals are for W phase and neutral point,
The bus plate portion includes a neutral point ring plate for connecting the neutral point coil terminals, a U phase ring plate for connecting the U phase coil terminals, and the V phase use. An armature, comprising: a V-phase ring plate that connects coil terminals; and a W-phase ring plate that connects the W-phase coil terminals. The armature according to any one of claims 6 to 8,
The connecting portion is formed to protrude radially outward from an outer peripheral edge of the bus plate portion. The armature according to claim 9, wherein
The bus plate portion has an external terminal portion connected to the outside, and the external terminal portion is formed to project radially inward from an inner peripheral edge of the bus plate portion. Armature to do. The armature according to any one of claims 8 to 10,
The U-phase ring plate, the V-phase ring plate, and the W-phase ring plate have the same shape. The armature according to any one of claims 7 to 11, wherein a spacer is provided between at least one of the plurality of ring plates and the coil terminal.

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