JP2003037958A - Rotary apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary apparatus, with which the terminal treatment of a coil consisting of plate conductors can be simplified and the insulating treatment between the plate conductors and a stator core can be made at a low cost. SOLUTION: On the upper plate 21b of a pedestal 21, coil penetrating holes 24a, 24b through which the terminals 16a, 16b of the coil 16 penetrate are provided. The upper plate 21b is further provided with guide fitting slots 25a to 25c, and coupling strips 31a to 31c for coupling the terminals 16a, 16b of the coil 16 together are fitted into the guide fitting slots. Each terminal 16a, 16b of the coil 16 is made to penetrate through each coil penetrating hole 24a and 24b to project upward from the upper plate 21b of the pedestal 21, then is coupled together by means of the coupling strips 31a to 31c, which are fitted into the guide fitting slots 25a to 25c, respectively. The pedestal 21 is also provided with 9 insulating boards 26 extending in the axial direction, where each insulating board is interposed between the terminal 16a of the coil 16, which is on the side of an outer core, and the outer core 12.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a rotating machine,
Specifically, winding terminal treatment of rotating equipment wound with flat wire,
And the insulation treatment between the winding end and the outer core.

[0002]

2. Description of the Related Art Generally, the connection between the coil ends of the winding wound around the teeth of the stator core of a rotating machine is performed after the ends of the winding wound around the teeth (slots) are routed to a predetermined connection position. Done. If the winding wire is a round wire, the winding wire can be bent in any direction, so that the winding terminal can be freely handled at the time of connection, that is, the winding end processing is easy.

Conventionally, there has also been a rotating machine in which a rectangular copper wire as a flat conductor wire is wound around the teeth of the stator core.

[0004]

However, in the rotating machine having the rectangular copper wire wound as described above, it is difficult to arrange each winding terminal at the time of connecting between the coil ends of the winding. In other words, when the winding wire is a rectangular wire having a square cross section, the winding wire can be bent only in two directions of the sides. When the winding is a thin rectangular wire having a rectangular vertical cross section and a large difference in length between both sides, the winding is easy to bend in the thickness direction and difficult to bend in the width direction. Therefore, the winding terminal treatment of the rotating equipment wound with the rectangular copper wire is troublesome.

Further, the insulation between the inner peripheral surface of the outer core and the winding is
Since insulating paper or the like is used, there is a problem that the number of parts and the number of assembling steps are large. Since the insulating paper is paper, it is easily damaged, and the damage to the insulating paper may cause electrical contact between the winding and the inner peripheral surface of the outer core, resulting in deterioration of motor performance.

The present invention has been made in view of the above-mentioned circumstances, and a first object thereof is to provide a rotating device capable of simplifying the winding terminal treatment of a flat plate wire. . A second object thereof is to provide a rotating device that can provide insulation between a flat plate conductor and a stator core at low cost.

[0007]

In order to solve the above problems, the invention as set forth in claim 1 is directed to a stator core having a plurality of teeth, and a winding made of an insulating material and fixed to one end side of the stator core. A wire end supporting member, a flat wire conductor wound around each of the teeth and having an end drawn out toward the winding end supporting member side, and a plate-like wire end connecting member made of a conductive material for connecting the end of the flat wire conductor. The gist of the present invention is to include a member and a foot portion provided on the winding end supporting member and made of a plurality of insulating materials extending in the axial direction and interposed between the end of the flat plate wire and the stator core.

According to a second aspect of the present invention, in the rotating machine according to the first aspect, the winding terminal supporting member is provided with a plurality of winding through holes into which the ends of the flat plate wire are inserted. In addition, a gist is that a plurality of guide fitting grooves that connect two or more of the winding through holes are provided, and the winding terminal connecting members are fitted into the guide fitting grooves.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the rotating device according to the item (1), at least a part of the intervening portion of the foot portion interposed between the flat plate conductor and the stator core is arranged in a circumferential direction larger than a circumferential interval between terminals of the flat plate conductors wound around adjacent teeth. The gist is that it is formed with the width.

According to a fourth aspect of the present invention, in the rotating machine according to the third aspect, a part of the intervening portion of the foot portion is provided on the winding terminal supporting member side, and a part of the intervening portion of the foot portion is provided. The gist is that other portions of the foot portion other than the above are formed with a circumferential width substantially the same as the circumferential distance between the ends of the two flat plate conductors.

The invention as defined in claim 5 is defined by claim 1 through claim 4.
In the rotating device according to any one of 1,
The gist is that the plate thickness is formed to be slightly smaller than the radial distance between the end of the flat wire and the stator core.

According to a sixth aspect of the present invention, in the rotating machine according to the fifth aspect, the other portion of the foot portion is formed such that its plate thickness is smaller than the plate thickness of a part of the intervening portion of the foot portion. What is done is summarized.

The invention according to claim 7 is the same as claims 1 to 6.
In the rotating device described in any one of 1, the gist is that the tip of the foot portion is formed in a tapered shape. The invention according to claim 8 is summarized in that, in the rotating device according to any one of claims 5 to 7, a reinforcing member is provided on the foot portion.

The invention according to a ninth aspect is the first to the eighth aspects.
In the rotating device according to any one of 1,
The gist is that it is extended from the winding end supporting member and is formed integrally with the winding end supporting member.

(Operation) According to the invention described in claims 1 and 2, the ends of the flat plate conductor are easily connected. The flat wire and the stator core are insulated by each foot. Compared with the conventional technology in which the flat conductor and the stator core are insulated with insulating paper,
Insulation failure due to damage of the insulating paper is prevented. Also, at the same time when the winding end supporting member is assembled to the stator core, each leg is interposed between the end of the flat wire and the stator core. Therefore, the man-hours for assembling the rotating device are reduced.

According to the third aspect of the present invention, the ends of the two flat plate conductors wound around the adjacent teeth and the stator core are reliably insulated by a part of the intervening portion of the foot portion. According to the invention described in claim 4, the foot portion can be easily inserted into the stator core. Therefore, it is possible to prevent the flat conductor wire from being damaged by the insertion of the foot portion.

According to the fifth aspect of the present invention, the foot portion is easily inserted between the end of the flat wire and the stator core. According to the sixth aspect of the invention, the foot portion can be more easily inserted into the stator core. Therefore, the flat wire is further prevented from being damaged by the insertion of the foot portion.

According to the seventh aspect of the invention, the foot portion is more likely to be inserted into the stator core. Therefore, the flat wire is further prevented from being damaged by the insertion of the foot portion. According to the invention described in claim 8, the strength of the foot portion is improved, and damage to the foot portion is prevented.

According to the invention described in claim 9, the number of parts of the rotating device can be reduced and the cost can be reduced as compared with the case where the foot portion is fixed to the winding terminal supporting member as a separate member.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in a 3-phase 9-slot brushless motor as a rotating machine will be described below with reference to FIGS. FIG. 1 is an exploded perspective view of the brushless motor of this embodiment. FIG. 2 is a perspective view of the brushless motor. Similarly, FIG. 3 is a plan view of the brushless motor. FIG. 4 is a sectional view taken along the line AA of FIG. FIG. 5 is a sectional view taken along line BB of FIG.

As shown in FIGS. 1 and 2, the brushless motor 10 of this embodiment has a stator 11, a pedestal 21 as a winding end supporting member, and a plurality of connecting pieces 31a as winding end connecting members. To 31c.

The stator 11 has a stator core 11a consisting of an outer core 12 and an inner core 13.
The outer core 12 is formed in an annular shape and has an inner peripheral surface 14
Are provided with nine wedge-shaped recesses 14a. The inner core 13 includes a cylindrical annular portion 15b and nine teeth 15 extending radially from the outer peripheral surface of the annular portion 15b and arranged at equal intervals along the circumferential direction. A wedge-shaped convex portion 15a that fits into the concave portion 14a is provided at a tip portion (outer end portion) of each tooth 15. It should be noted that the portion between the base end portion and the tip end portion of the tooth 15 is the winding winding portion 1 of the tooth 15.
5c.

The winding winding portion 15c of each tooth 15 includes
Each winding 16 as a flat conductor wire is wound.
In the present embodiment, the winding wire 16 wound around each tooth 15 is made of a rectangular copper wire having a rectangular cross section. Then, the inner core 13 and the outer core 12 are connected by fitting the protrusions 15a into the corresponding recesses 14a. Two winding ends 16 of the winding 16 wound around each tooth 15.
Each of a and 16b is drawn out so as to extend above the stator 11. Here, each winding terminal (outer core side terminal) on the outer core 12 side is connected to the first winding terminal 16a.
Each winding terminal on the inner core 13 side (inner core side terminal) is defined as a second winding terminal 16b.

The pedestal 21 is made of synthetic resin as an insulating material, and is shaped like an inverted dish. As shown in FIGS. 1, 4 and 5, the pedestal 21 includes a ring portion 21a having an outer diameter equal to the outer diameter of the outer core 12 and an inner diameter larger than the inner diameter of the outer core 12, and an upper end of the ring portion 21a. The closing upper plate portion 21b is provided. The upper plate 21
At the center of b, a circular through hole 23 is provided for inserting a rotary shaft 18 (shown by a chain double-dashed line in FIGS. 3 and 4) of a rotor 17 of the brushless motor 10.

The upper plate portion 21b of the pedestal 21 is shown in FIGS.
And as shown in FIG. 4, the first and second winding terminals 16a,
First and second winding penetration holes 24a through which 16b is inserted,
24b is provided. The first winding through hole 24a is
Nine pieces are formed on the same circumference on the outer peripheral side of the upper plate portion 21b, and each first winding terminal 16a is inserted into each of them. Nine second winding insertion holes 24b are formed on the same circumference on the inner circumference side of the upper plate portion 21b, and each second
The winding terminal 16b is inserted.

In the upper plate portion 21b, a first guide fitting groove 25a connecting the first winding through holes 24a and a second guide fitting groove 25a connecting the second winding through holes 24b are formed. Of the guide fitting groove 25b and the third guide fitting groove 25c of the upper plate portion 21b.
Provided from the outer surface of. In the present embodiment, as shown in FIG. 3, three first guide fitting grooves 25a are provided so as to respectively communicate the two first winding insertion holes 24a. Three second guide fitting grooves 25b are provided so as to respectively connect the two winding through holes 24b. One third guide fitting groove 25c is provided so as to communicate the three second winding through holes 24b. Moreover, the first to third guide fitting grooves 25a to 25c connecting the first and second winding through holes 24a and 24b, respectively, are provided with the first and second winding through holes 24a and 24b. Is formed so as to extend along the circumferential direction on the inner peripheral side.

Further, as shown in FIGS. 1, 4 and 5, on the upper plate portion 21b, insulating plates 26 as a plurality of legs are downwardly moved from the lower surface of the upper plate portion 21b along the axial direction. Has been extended to. Insulation plate 26 corresponds to teeth 15
A single sheet is provided and arranged at equal intervals along the circumferential direction. In the present embodiment, each insulating plate 26 is inserted into the nine slots between the teeth 15 so that the upper plate 2
It is provided at a predetermined position on the circumference of 1b. Each insulating plate 2
6 includes a wide portion 26a as a part of the interposition portion and a narrow portion 26b as another portion other than the interposition portion.

The wide portion 26a is formed in a rectangular cross section, and as shown in FIG. 5, the width L1 is greater than the distance L2 between the outer core side ends 16a of the windings 16 which are reversely wound around the adjacent teeth 15. It is getting bigger. Narrow portion 26
b is formed in a rectangular cross section, and its width L3 is substantially the same as the interval L2. Further, the wide portion 26a is
As shown in FIG. 4, the plate thickness t1 is slightly smaller than the radial distance between the winding terminal 16a and the inner peripheral surface 14 of the outer core 12. The narrow width portion 26b is formed such that its radial inner surface is flush with the radial width inner surface of the wide portion 26a, and its plate thickness t2 is smaller than the plate thickness t1 of the wide portion 26a. Further, the insulating plate 26 has a length in the axial direction which is the same as the length in the axial direction of the outer core 12 and the ring portion 21a.
Is greater than the sum of the axial length of. Wide part 26
The axial length h1 of a is longer than the axial length of the ring portion 21a.

The connecting pieces 31a to 31c are formed of a metal plate as a conductive material. As shown in FIGS. 1 and 3, the first connecting piece 31 a includes two terminal contact portions 3 a.
2 and a connecting portion 33 that connects both of the terminal abutting portions 32, and three pieces are provided so as to fit in the first guide fitting grooves 25a. The second connecting piece 31b is 2
It is composed of one terminal abutting portion 34 and a connecting portion 35 that connects the both terminal abutting portions 34, and three pieces are provided so as to be fitted in the respective second guide fitting grooves 25b. The third connecting piece 31c is composed of three terminal abutting portions 36 and a connecting portion 37 that connects the three terminal abutting portions 36, and fits into each of the third guide fitting grooves 25c. One is provided.

The terminal contact portions 32, 34, 36 and the winding terminals 16a, 16b are in contact with each other over a wide area. In addition, the terminal contact portions 32, 34, 36
The width in the circumferential direction is formed to be slightly wider than the width of the winding terminals 16a and 16b.

Then, as shown in FIG.
While inserting the winding ends 16a and 16b between the winding cores 16a and the outer core 12, the winding ends 16a and 16b are inserted into the corresponding first and second winding through holes 24a and 24b, respectively. The lower end surface of 21a is brought into contact with the upper end surface of the outer core 12. Thereby, each winding terminal 16a, 1
The pedestal 21 and the stator 11 are assembled so that 6b projects upward from the upper plate portion 21b, and each insulating plate 26 is interposed between each winding terminal 16a and the outer core 12. Next, as shown in FIGS. 2 to 4, each of the first to third connection pieces 31a to 31a.
31c is fitted in each of the first to third guide fitting grooves 25a to 25c so as to come into contact with the winding terminals 16a and 16b corresponding to the terminal abutting portions 32, 34 and 36, respectively. Then, the first to third connecting pieces 31a, 31b, 31
c is electrically connected to the winding terminals 16a and 16b by brazing.

According to the brushless motor 10 of this embodiment, the following effects can be obtained. (1) A winding insertion hole 24 for inserting the winding terminals 16a and 16b of the winding 16 in the upper plate portion 21b of the pedestal 21.
a and 24b are provided. Further, guide fitting grooves 25a to 25c into which the connecting pieces 31a to 31c for connecting the winding terminals 16a and 16b of the winding 16 are fitted to the upper plate portion 21b.
Is provided. Winding terminals 16a, 16b of each winding 16
Connecting pieces 31a to 31 that are inserted into the winding through holes 24a and 24b so as to project upward from the upper plate portion 21b of the pedestal 21 and then fit into the guide fitting grooves 25a to 25c.
It is electrically connected at c. Therefore, the winding ends 16a and 16b of the winding 16 can be easily connected without arranging them. As a result, the winding end processing of the brushless motor 10 can be simplified.

(2) The pedestal 21 has nine axially extending members.
A book insulating plate 26 is provided, and each insulating plate 26 is interposed between the outer core side end 16 a of the winding 16 and the outer core 12. Therefore, the outer core side end 16 of the winding 16
The a and the outer core 12 are insulated by each insulating plate 26.
Insulation failure due to breakage of the insulating paper is prevented as compared with the prior art in which the flat conductor and the outer core are insulated with insulating paper. As a result, the outer core end 16a of the winding 16 and the outer core 12 can be insulated with a simple structure.

(3) Since each insulating plate 26 is provided on the pedestal 21, the pedestal 21 is assembled to the stator core 11a, and at the same time, each insulating plate 26 is provided between the outer core side end 16a of the winding 16 and the outer core 12. Intervened. Therefore, the number of assembling steps of the brushless motor 10 can be reduced. Further, since each insulating plate 26 extends from the pedestal 21 and is formed integrally with the pedestal 21, the insulating plate 2
Compared with the case where 6 is fixed to the pedestal 21 as a separate member,
The number of parts of the brushless motor 10 can be reduced and the cost can be reduced.

(4) The wide portion 26a is the outer core side end 16 of both windings 16 wound around the adjacent teeth 15.
It is formed with a circumferential width L1 larger than the circumferential distance L2 between a. Therefore, the outer core side end 16a of both windings 16 wound around the adjacent teeth 15 and the outer core 1
2 is reliably insulated by the wide portion 26a.

(5) The wide portion 26a is provided on the pedestal 21 side, and the narrow portion 26b is substantially the same as the circumferential distance L2 between the outer core side terminals 16a of both windings 16 wound around the adjacent teeth 15. It is formed with a circumferential width L3. Therefore, since the narrow portion 26b is inserted into the stator core 11a first, the insulating plate 26 is easily inserted into the stator core 11a. Therefore, the insertion of the insulating plate 26 prevents the winding 16 from being damaged.

(6) The plate thickness t1 of the wide portion 26a is the winding 1
6 is slightly smaller than the radial distance between the outer core side terminal 16a and the outer core 12. Also, the narrow portion 2
The plate thickness t2 of 6b is smaller than the plate thickness t1 of the wide portion 26a. Therefore, the insulating plate 26 is easily inserted between the outer core side end 16a of the winding 16 and the outer core 12, and the insertion of the insulating plate 26 further prevents the winding 16 from being damaged.

The present embodiment may be modified as follows. In the above embodiment, the winding 16 is wound around the winding winding portion 15c such that the short side surface of the winding 16 contacts the winding winding portion 15c. The winding may be performed by winding the winding winding portion 15c so that the surface contacts the winding winding portion 15c.

In the above embodiment, next, the winding winding section 15
Although the winding 16 wound around the winding c is not overlapped with the winding 16 wound around the winding winding portion 15c first, the winding 16 wound around the winding winding portion 15c is wound around first. Part 1
Alternatively, the winding 16 wound around 5c may be partially overlapped with the winding.

In the above embodiment, the winding 16 wound around each tooth 15 is a rectangular copper wire having a rectangular cross section, but the winding 16 is not limited to a rectangular cross section and other cross sections may be used. Alternatively, a flat copper wire having a flat shape or the like may be used.

The narrow width portion 26b is provided with the adjacent teeth 15
It may be formed with a circumferential width smaller than the circumferential distance L2 between the outer core side ends 16a of the two windings 16 wound around. The wide portion 26a and the narrow portion 26b may be formed with the same cross-sectional shape and cross-sectional area.

The axial length of the insulating plate 26 may be substantially the same as the sum of the axial length of the outer core 12 and the axial length of the ring portion 21a. The insulation plate 26 may be separately attached and fixed to the pedestal 21.

As shown in FIG. 6, the tip of the insulating plate 26 on the side opposite to the pedestal 21, that is, the tip 26d of the narrow portion 26b is tapered so that its cross-sectional area becomes smaller toward the tip surface of the tip 26d. You may form. In this case, the insulating plate 26
Is more easily inserted into the stator core 11a, and the winding 16 is further prevented from being damaged by the insertion of the insulating plate 26.

○ As shown in FIG. 7, the pedestal 2 of the insulating plate 26
You may implement | achieve by providing the convex part 26e as a reinforcing member in the center of the uniaxial center side inner surface 26c. Therefore, the strength of the insulating plate 26 is improved and damage to the insulating plate 26 is prevented. Moreover, since the convex portion 26e is provided at the center of the inner surface 26c of the insulating plate 26 on the side of the pedestal 21 axis, it does not interfere with the insertion of the insulating plate 26 into the stator core 11a. In addition, the convex portion 2
6e may be fixed to the insulating plate 26 as a separate member (may be a non-insulating material). Moreover, you may provide the convex part 26e in the shape of a rib extended over the longitudinal direction of the insulating plate 26. You may provide the convex part 26e in several places along the longitudinal direction of the insulating plate 26. Further, the convex portion 26e may be formed in a shape other than a quadrangular cross section, such as a semicircular cross section or a triangle.

The pedestal 21 may be made of an insulating material other than synthetic resin. The first to third connecting pieces 31a, 31b, 31c may be electrically connected to the winding terminals 16a, 16b by a connecting means other than brazing, such as soldering or welding.

In the above embodiment, the present invention is embodied in a three-phase, nine-slot brushless motor. However, the present invention is embodied in another brushless motor or another electric motor having a rectangular winding. You may implement.

[0047]

As described above in detail, according to the inventions described in claims 1 to 9, it is possible to simplify the winding terminal treatment of the rotating equipment, and to reduce the cost of the flat plate conductor and the stator core. Insulation between can be applied.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts of a brassless motor according to an embodiment.

FIG. 2 is a perspective view of an essential part of the brassless motor.

FIG. 3 is a plan view of the brassless motor.

4 is a cross-sectional view taken along the line AA of FIG.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a perspective view of a base of a brassless motor according to another example.

FIG. 7 is a sectional view of a brassless motor according to another example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Brushless motor as a rotating device, 11a ... Stator core, 15 ... Teeth, 16 ... Winding as a flat wire, 16a ... 1st winding terminal as an end of a flat wire,
16b ... Second winding terminal as terminal of flat wire, 21 ...
Pedestal as winding end support member, 24a, 24b ... Winding through hole, 25a-25c ... Guide fitting groove, 26 ... Insulating plate as foot, 26a ... Wide part as part of intervening portion of foot , 26b ... a narrow portion as another portion of the foot, 26d ...
Tip of foot portion, 26e ... Convex portion as reinforcing member, 31a to
31c ... A connecting piece as a winding end connecting member.

Continued front page    (72) Inventor Takanori Ozawa             Asumo Corporation, 390 Umeda, Kosai City, Shizuoka Prefecture             In the company (72) Inventor Mitsuhiko Matsushita             Asumo Corporation, 390 Umeda, Kosai City, Shizuoka Prefecture             In the company F-term (reference) 5H603 AA03 AA04 AA09 BB01 BB10                       BB12 CA01 CA05 CB18 CB26                       CC11 CC17 CD21 CE02 CE13                       EE01 FA01 FA16                 5H604 AA05 AA08 BB01 BB14 BB17                       CC01 CC05 CC16 DB01 PB03                       PC03 QB14

Claims (9)

[Claims] 1. A stator core (11a) having a plurality of teeth (15), a winding terminal support member (21) made of an insulating material and fixed to one end of the stator core (11a), and each of the teeth ( 15) wrapped around the terminal (16a, 16)
b) a flat plate conductor (16) drawn out to the winding end supporting member (21) side, and an end (16) of the flat plate conductor (16) made of a conductive material.
a, 16b) a plate-shaped winding end connecting member (31
a to 31c) and a plurality of insulating materials provided on the winding end supporting member (21) and extending in the axial direction, and interposed between the end (16a) of the flat plate conductor (16) and the stator core (11a). And a foot portion (26) to be rotated. 2. The rotating machine according to claim 1, wherein the winding terminal supporting member (21) includes the flat plate wire (1).
6) A plurality of winding insertion holes (24a, 24b) for inserting the terminals (16a, 16b) of 6) are provided, and a guide fitting for connecting two or more winding insertion holes (24a, 24b). A rotary device, characterized in that a plurality of grooves (25a to 25c) are provided, and the winding end connection members (31a to 31c) are fitted into the guide fitting grooves (25a to 25c). 3. The rotating machine according to claim 1, wherein at least a part (26a) of the interposition part of the foot part (26) interposed between the flat plate conductor (16) and the stator core (11a) is provided. A rotating device characterized by being formed with a circumferential width (L1) larger than the circumferential distance (L2) between the ends (16a) of both flat plate conductors (16) wound around adjacent teeth (15). 4. The rotating device according to claim 3, wherein a part (26a) of the interposing portion of the foot portion (26) is provided on the winding terminal supporting member (21) side, and the foot portion (26). The other portion (26b) of the foot portion (26) other than the portion (26a) of the intervening portion of
6) A rotary device characterized by being formed with a circumferential width (L3) substantially the same as the circumferential spacing (L2) between the terminals (16a) of 6). 5. The rotating machine according to claim 1, wherein the foot portion (26) has a plate thickness (t1) of the end (16a) of the flat plate conductor (16) and a stator core (16). 11a) is formed so as to be slightly smaller than the radial distance between the rotating machine and the rotating equipment. 6. The rotating device according to claim 5, wherein the other portion (26b) of the foot portion (26) has a plate thickness (t).
The rotating device is characterized in that 2) is formed so as to be smaller than the plate thickness (t1) of a part (26a) of the interposition part of the foot part (26). 7. The rotating device according to claim 1, wherein a tip end (26d) of the foot portion (26) is formed in a tapered shape. 8. The rotating device according to claim 5, wherein the foot portion (26) is provided with a reinforcing member (26e). 9. The rotating device according to claim 1, wherein the foot portion (26) extends from the winding terminal supporting member (21). ) Is integrally formed with a rotating device.