JP2009131087A - Rotor of rotating electrical machine and manufacturing method of same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor of a rotating electrical machine, which improves strength in the rotating axis direction thereof and reduces the number of constituent components thereof, and also to provide a manufacturing method of the same. <P>SOLUTION: The rotor of a rotating electrical machine which is arranged apart from a stator by a gap (a) includes a spiral steel plate 15 made by spirally winding an electromagnetic steel plate 15a, a concave space (b) which is opened on the gap (a) side to store the spiral steel plate 15 and a magnet 13 laid on top of the spiral steel plate 15, a hole 19 which is connected to the concave space (b) and passes the electromagnetic steel plate 15a therethrough, and a base plate 16 having an outer peripheral wall 16b for preventing fall-off of the magnet 13 out of the concave space (b). The hole 19 is such that a planary shape of the outer peripheral wall 16a is determined by a line segment based on an added value of the inner radius of a collar 14 around which the electromagnetic steel plate 15a is wound and the thickness of the steel plate and a line segment based on a value of the inner diameter of the outer peripheral wall 16a minus the thickness of the steel plate. In the rotating axis direction of the rotor, it also has a length long enough to ensure the thickness of a back yoke. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotor for a rotating electrical machine and a method for manufacturing the same, and more particularly, to a rotor for an axial gap type rotating electrical machine in which a rotor and a stator are opposed to each other in the rotor rotation axis direction and a method for manufacturing the same.

2. Description of the Related Art Conventionally, there is known an axial gap type rotating electrical machine in which a rotor and a stator are opposed to each other in the rotor rotation axis direction, and the rotor is formed by winding a magnetic steel sheet in a spiral shape. As a rotor having such a configuration, for example, there is “a manufacturing method of an iron core for an electric motor” (see Patent Document 1).
The rotor in the “method for manufacturing an iron core for an electric motor” is obtained by fitting a ring member to the outer periphery of a wound electromagnetic steel sheet, reinforcing the centrifugal force by rotation, and then fixing the rotor to the base plate using an adhesive. The strength in the direction of the rotation axis was secured.
Japanese Patent Laid-Open No. 2-179247

However, in the case of the above-described conventional rotor structure, the adhesive is used to fix the base plate to the base plate. There was a risk of peeling. Moreover, since the base plate which is a different member from the wound electromagnetic steel plate is required, the number of parts was also large.
An object of the present invention is to provide a rotor of a rotating electrical machine that can improve the strength in the rotor rotation axis direction and reduce the number of parts, and a manufacturing method thereof.

  In order to achieve the above object, a rotor of a rotating electrical machine according to the present invention is a rotor of a rotating electrical machine disposed with a gap between the stator and a spiral steel plate in which an electromagnetic steel plate is spirally wound, A recess that opens to the gap side and stores the spiral steel plate and a magnet disposed on the spiral steel plate, an opening that communicates with the recess and passes the electromagnetic steel plate, and a drop that prevents the magnet from falling off the recess And a base plate provided with a prevention portion.

  In the method of manufacturing a rotor for a rotating electrical machine according to the present invention, when the rotor of the rotating electrical machine according to the present invention is manufactured, a reinforcing member or a winding jig for winding the electromagnetic steel sheet is mounted on the base plate. A process, a process of attaching and fixing the electromagnetic steel sheet inserted from the opening of the base plate to the reinforcing member or the winding jig, and the reinforcing member or the winding jig fixing the electromagnetic steel sheet. The magnetic steel sheet is wound in the winding direction of the magnetic steel sheet, thereby winding the magnetic steel sheet and forming the spiral steel sheet.

According to this invention, the rotor of the rotating electrical machine disposed with a gap between the stator and the spiral steel plate wound in a spiral shape, the spiral steel plate opened to the gap side, and the spiral steel plate into the spiral steel plate It has a base plate provided with a concave portion for storing together with the magnets arranged in an overlapping manner, an opening portion that communicates with the concave portion and allows the electromagnetic steel plate to pass through, and a drop-off preventing portion that prevents the magnet from falling off the concave portion. Thereby, the strength in the rotor rotation axis direction can be improved and the number of parts can be reduced.
Moreover, the rotor for a rotating electrical machine can be realized by the method for manufacturing a rotor for a rotating electrical machine according to the present invention.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional explanatory view of a rotor of a rotating electrical machine according to an embodiment of the present invention. As shown in FIG. 1, the rotor 10 of the rotating electrical machine is disposed to face the stator 12 with a gap (gap) a in the axial direction of the rotor rotation shaft 11, and faces the stator facing surface, that is, the gap a. A plurality of (only one shown) magnets (permanent magnets) 13 are embedded with their surfaces exposed on the side surfaces.

  The rotor 10 includes a spiral steel plate 15 formed by spirally winding an electromagnetic steel plate 15a around a collar (reinforcing member) 14 inside a thick disc-like base plate 16 so as to be positioned on the back side of the magnet 13. It is formed by mounting. The spiral steel plate 15 is incorporated in the base plate 16 by attaching and fixing a holding member 17 for holding and fixing the collar 14 together with the magnet 13 to the base plate 16 with bolts 18, for example.

  FIG. 2 is a perspective view showing an external shape of the base plate of FIG. As shown in FIG. 2, the base plate 16 has a central step portion 16 a having a through-hole through which the rotor rotation shaft 11 passes in the center of the plane on the gap a (see FIG. 1) side. Between the outer peripheral walls 16b, there is a recessed space (recessed portion) b for incorporating the magnet 13, the collar 14, the spiral steel plate 15, and the holding member 17, which occupies approximately half of the thickness of the base plate 16 on the gap a side. . The outer peripheral wall 16b of the base plate 16 is an inclined surface whose upper inner peripheral surface is reduced in diameter toward the upper surface (gap a side), and the recessed space b has an opening whose diameter is reduced from the inside of the space (FIG. 1). , 2). The outer peripheral wall 16b has a hole (opening) 19 formed of a rectangular opening communicating with the recessed space b.

Next, a method for forming the spiral steel plate 15 by winding the electromagnetic steel plate 15a around the collar 14 will be described.
FIG. 3 is an explanatory diagram of the beginning of winding of the electrical steel sheet of FIG. FIG. 4 is an explanatory diagram of the shape of the holes formed in the base plate of FIG. FIG. 5 is an explanatory view showing a state in which the electromagnetic steel sheet of FIG. 1 is attached to the collar. FIG. 6 is an explanatory view of the end of winding of the electrical steel sheet of FIG.

  As shown in FIG. 3, first, the collar 14 is mounted on the base plate 16. The collar 14 is disposed outside the central step 16a and in contact with the bottom of the recessed space b (see FIG. 1). Next, the tip end portion of the electromagnetic steel plate 15 a drawn into the base plate 16 through the hole 19 formed in the outer peripheral wall 16 b is attached to the collar 14. The electromagnetic steel plate 15a is guided to the hole 19 via a guide roller 21 guided to a guide hole 20 of a steel plate winder (not shown) for supplying the electromagnetic steel plate 15a and winding it around the collar 14. The electromagnetic steel plate 15a led to the hole 19 is disposed along the outer peripheral surface of the collar 14 having the outer peripheral radius Ric. The guide roller 21 has an outer diameter larger than the inner diameter (inner diameter of the outer peripheral wall 16b) Ro of the base plate 16.

  As shown in FIG. 4, the hole 19 opened in the outer peripheral wall 16 b is formed in one of the two lines x and y that are orthogonal to each other through the plane center O of the base plate 16 in the planar shape of the outer peripheral wall 16 b. From the plane center O to the line z passing through the intersection of the inner peripheral surface of the outer peripheral wall 16b and the line y1, from the plane center O, between the length separation obtained by adding the steel plate thickness tr to the outer peripheral radius Ric of the collar 14, It is formed from a cross section by a line z1 orthogonal to the plane center O side from the intersection with the line y1 at a position between the thickness tr separation of the electromagnetic steel sheet 15a. Further, the direction of the rotor rotation axis of the hole 19 has a length including the thickness of the back yoke.

In other words, the hole 19 has a planar shape on the outer peripheral wall 16b of the base plate 16 that is based on a line segment (Ric + tr) obtained by adding the steel plate thickness tr to the inner radius Ric of the collar 14, and the steel plate thickness from the inner diameter of the outer peripheral wall 16b of the base plate 16. It is determined from the line segment based on the value obtained by dividing tr, and the rotor rotational axis direction has a length that secures the back yoke thickness.
Thereby, since the contact of the electromagnetic steel plate 15a with the base plate 16 is eliminated at the time of winding the electromagnetic steel plate, a problem due to the contact does not occur, and the quality of the electromagnetic steel plate 15a can be maintained.

As shown in FIG. 5, the electromagnetic steel plate 15 a is attached to the collar 14 with a longitudinal groove-like slit (locking portion) 14 a that opens in the lower part of the outer peripheral surface of the collar 14 and a convex portion that can be inserted into the slit 14 a at the lower end. This is done by inserting and locking the tip (lower end) of the formed electromagnetic steel sheet 15a. As a result, the magnetic steel sheet 15 a is held and held by the collar 14 at the tip. As a result, the electromagnetic steel plate 15a is fixed to the base plate 16 side of the collar 14, and the collar 14 is later fixed by the holding member 17, so that the electromagnetic steel plate 15a can be prevented from coming off in the direction of the rotor rotating shaft 11.
The electromagnetic steel plate 15a is positioned in the tangential direction of the outer surface of the collar 14 through the hole 19 through the guide roller 21 in a state where the tip portion of the electromagnetic steel plate 15a is locked and held by the collar 14 (see FIG. 3).

  Next, in a state where the tip of the electromagnetic steel sheet 15a is locked and fixed to the collar 14, the collar 14 is rotated by a steel sheet winder (see the arrow in FIG. 3), and the electromagnetic steel sheet 15a is wound around the collar 14. At this time, as the amount of winding of the electromagnetic steel sheet 15a around the collar 14 increases, that is, the distance from the center O of the base plate 16 at the winding position of the electromagnetic steel sheet 15a to the collar 14, the radius of the spiral steel sheet during winding. Accordingly, the base plate 16 is rotated in the rotation direction of the collar 14 (see the arrow in FIG. 3).

  Thereafter, winding of the electromagnetic steel sheet 15a around the collar 14 proceeds, and the electromagnetic steel sheet 15a is wound around the concave space b (see FIG. 3) without any gap so as to contact the inner surface of the base plate 16, as shown in FIG. Thus, the winding of the electromagnetic steel sheet 15a around the collar 14 is completed. At this time, the base plate 16 is rotated in the rotation direction of the collar 14 by an angle θ (see FIG. 3) from the winding start position, and the hole 19 passes through two planes x orthogonal to each other through the plane center O of the base plate 16. , Y on the other line x (see FIG. 4). The guide roller 21 also moves in accordance with the rotational movement of the base plate 16 so that the electromagnetic steel plate 15a is always positioned in the substantially tangential direction of the winding position (see arrow in FIG. 3).

Thus, when the electromagnetic steel plate 15a is wound around the collar 14, the base plate 16 is rotated in the electromagnetic steel plate winding direction and the guide roller 21 is moved in accordance with the winding amount. , Always located in the tangential direction. Thereby, since the winding angle of the electromagnetic steel sheet 15a can be kept constant via the guide roller 21, the tension applied to the electromagnetic steel sheet 15a during winding can be kept constant, and the laminated thickness in the spiral steel sheet 15 can be maintained. The thickness can be made uniform.
FIG. 7 is an explanatory view similar to FIG. 3 by another winding method of the electromagnetic steel sheet. FIG. 8 is an explanatory view similar to FIG. 6 by another winding method of the electromagnetic steel sheet. As shown in FIGS. 7 and 8, when winding the electromagnetic steel sheet 15a around the collar 14, the base plate 16 may be fixed and only the collar 14 may be rotated.

That is, when the collar 14 is rotated by a steel sheet winder (not shown) (see arrows in FIGS. 7 and 8) and the electromagnetic steel sheet 15a is wound around the collar 14, the winding amount of the electromagnetic steel sheet 15a to the collar 14 is reduced. The guide roller 21 guided by the guide hole 20 is moved so that the electromagnetic steel plate 15a is always positioned in the substantially tangential direction of the winding position according to the radius of the spirally wound steel plate 15 in the middle of winding. (See FIGS. 7 and 8).
As described above, in this winding method, the base plate 16 is not rotated in the rotation direction of the collar 14, but the base plate 16 is fixed and the guide roller 21 is moved, so that the electromagnetic steel sheet 15a is always taken up in the winding position. It is located in the substantially tangential direction.

Next, the holes 19 formed in the base plate 16 will be described.
When the bridge portion formed between the outer periphery of the rotor core (coiled steel plate 15) and the slot (not shown) has a separate structure, the window-shaped hole 19 may be used as described above (see FIG. 2). On the other hand, when the bridge portion is integrated with the spiral steel plate 15, it is necessary to open to the side surface of the gap a of the base plate 16 in order to correspond to the bridge portion. That is, in the case of the bridge portion integrated structure, the base plate 16 is cut out to form a groove (opening) so as to open the window-shaped hole 19 to the gap a side (see FIG. 13).

Next, the magnet 13 is attached to the base plate 16 on which the spiral steel plate 15 is mounted.
FIG. 9 is a cross-sectional explanatory diagram of a method (part 1) of fixing a magnet to a base plate. As shown in FIG. 9, a base plate 16 on which a spiral steel plate 15 is formed by winding an electromagnetic steel plate 15a around a collar 14 has a central step 16a above the spiral steel plate 15 and the collar 14 (that is, on the gap a side). Thus, a space c surrounded by the outer peripheral wall 16b and having an opening on the stator facing surface is formed. The magnet 13 is incorporated in the space c.

  The magnet 13 is formed so that the upper surface side (gap a side) has a smaller diameter than the lower surface side in a state of being disposed on the base plate 16, that is, the cross section along the axial direction of the rotor rotation shaft 11 has a trapezoidal shape. Has been. First, the magnet 13 enters the space c so that the lower end is in contact with the lower portion of the outer peripheral wall 16b (that is, the upper surface of the spiral steel plate 15), and then the magnet 13 is placed on the spiral steel plate 15 from the stator facing surface side. To the state. At this time, the magnet 13 is closely attached to the inner inclined surface of the outer peripheral wall 16b on the outer peripheral wall 16b side, and the central step 16a side is located at a substantially boundary portion between the spiral steel plate 15 and the collar 14, A space sandwiched between the inclined surface of the magnet 13 and the vertical wall surface of the central step portion 16a is formed between the central step portions 16a.

  Next, the holding member 17 is inserted and arranged in the space formed by the magnet 13 and the central step portion 16a. The holding member 17 has a cross section along the axial direction of the rotor rotating shaft 11, the central step portion 16 a side is substantially in close contact with the vertical wall surface of the central step portion 16 a, and the magnet 13 side is substantially in close contact with the inclined surface of the magnet 13 on the central step portion 16 a side. It forms so that it may become a trapezoid shape (refer FIG. 1). The holding member 17 arranged in the space formed by the magnet 13 and the central step portion 16a is attached and fixed to the base plate 16 with, for example, a bolt 18 stopper in a state of covering the outer peripheral inclined surface of the magnet 13 (FIG. 1). reference).

  Thus, the magnet 13 is fitted into the space c formed above the spiral steel plate 15 and the collar 14 (on the gap a side) of the base plate 16 in which the spiral steel plate 15 is incorporated, and then the magnet 13 and the central step 16a. The holding member 17 inserted and arranged in the space is fixed to the base plate 16. As a result, the magnet 13 is substantially in close contact with the inner inclined surface of the outer peripheral wall 16b on the outer peripheral wall 16b side, and the magnet 13 side inclined surface of the holding member 17 on the holding member 17 side. The holding member 17 restricts the movement of the base plate 16 above the space c (on the gap a side) and prevents the base plate 16 from falling off the space c.

That is, the outer peripheral wall 16b having the inner inclined surface and the holding member 17 that are in close contact with the outer peripheral portion of the magnet 13 from above and restrict the movement of the magnet 13 above the space c (the gap a side) prevent the magnet 13 from falling off. It functions as a drop-off prevention part to prevent.
10A and 10B show a method (part 2) of fixing a magnet to a base plate, where FIG. 10A is a cross-sectional explanatory view after the spiral steel plate is mounted, and FIG. As shown in FIG. 10, here, a collar 22 that has a magnet holding function instead of the collar 14 and functions as a holding member is used, and a bond magnet 23 is used instead of the magnet 13, and the collar 22 is locked and fixed. By using the base plate 24, the bonded magnet 23 can be locked and fixed without using another member (for example, the holding member 17).

The collar 22 has a locking step 22 b that is locked to a locking projection 25 formed on the base plate 24, along with an inclined surface 22 a that corresponds to the outer peripheral inclined surface of the magnet 13. That is, the collar 22 has a shape in which the inclined surface 22a is projected from the upper surface side (gap a side) of the collar 14. Other shapes and operations are the same as those of the collar 14.
The bond magnet 23 is formed in substantially the same shape as the magnet 13 by crushing a magnet, such as a ferrite magnet, and kneading it into rubber, synthetic resin, or the like, and has the flexibility of being easily deformed as a whole. Other shapes and operations are the same as those of the magnet 13.

The base plate 24 has a locking projection 25 on the upper surface side (gap a side) of the central step portion 24a so as to cover the lower portion of the collar 22 and project substantially horizontally toward the outer peripheral wall 16b. The locking step 22 b of the collar 22 is brought into contact with and locked to the lower surface side of the locking projection 25. Other shapes and operations are the same as those of the base plate 16.
As shown in FIG. 10, an inclined surface 22a and an outer peripheral wall of the collar 22 are provided above the spiral steel plate 15 (on the gap a side) on the base plate 24 on which the spiral steel plate 15 is formed by winding the electromagnetic steel plate 15a around the collar 22. A space d surrounded by the inner inclined surface of 16b and having an opening on the gap a side is formed (see (a)). At this time, the collar 22 is restricted from moving upward (gap a side) by the locking projection 25 and is locked to the base plate 24.

  The bond magnet 23 is incorporated in the space d. In the space d, the diameter of the space opening is reduced compared to the inner back, that is, the upper surface side of the spiral steel plate 15, but the bond magnet 23 is easily deformed, so the space d is pushed into the space d from the stator facing surface side. In this way, the bonded magnet 23 is placed on the spiral steel plate 15. At this time, the magnet 13 is substantially in close contact with the inner inclined surface of the outer peripheral wall 16b on the outer peripheral wall 16b side, and substantially in close contact with the inclined surface 22a of the collar 22 on the central step portion 16a side (see (b)). Thereby, the bond magnet 23 is attached and fixed to the base plate 16 (see (b)).

  As described above, the rotor 10 of the rotating electrical machine according to the present invention includes a spiral steel plate 15 in which the electromagnetic steel plate 15a is spirally wound in the rotor of the rotating electrical machine disposed with a gap a between the stator and the rotor. , A recess-shaped space b that opens on the gap a side and houses the spiral steel plate 15 and the magnet 13 that is placed on the spiral steel plate 15, a hole 19 that communicates with the recess-shaped space b and passes the electromagnetic steel plate 15 a, and a recess in the magnet 13 And a base plate 16 provided with an outer peripheral wall 16b for preventing falling off from the shape space b.

  By having the above configuration, the electromagnetic steel sheet 15a is passed through the hole 19 for inserting the electromagnetic steel sheet in the base plate 16, and the electromagnetic steel sheet 15a is fixed in the direction of the rotor rotating shaft 11 at the inner diameter portion of the recessed space b. By winding the electromagnetic steel plate 15a in a spiral shape by rotation, the base plate 16 and the electromagnetic steel plate 15a can be produced integrally, and the number of parts can be reduced while improving the strength of the rotor 10.

Next, a method for manufacturing a rotor of a rotating electrical machine according to the present invention will be described.
11A and 11B show a manufacturing method (part 1) in the separate bridge structure of the rotor of FIG. 1, FIG. 11A is a perspective view of the base plate, and FIG. 11B is a cross-sectional explanatory view similar to FIG. In the figure, the inner diameter of the recess-shaped space b opening (gap a side) of the base plate outer peripheral wall 16b is Ro1, and the inner diameter of the base of the base plate outer peripheral wall 16b (spiral steel plate 15 storage part) is Ro2.
As shown in FIG. 11, when manufacturing the rotor 10 having a separate bridge portion structure, first, the electromagnetic steel plate 15 a through the hole 19 (see (a)) provided in the base plate 16 is attached to the collar 14. Next, the collar 14 is rotated in the electromagnetic steel sheet winding direction, and the electromagnetic steel sheet 15a is wound up to the outer diameter of the spiral steel sheet 15, that is, the inner diameter Ro2. When the winding of the spiral steel plate 15 is completed, the spiral steel plate 15 is formed in the base plate 16 (see (b)).

Next, the magnet 13 is inserted and placed above the spiral steel plate 15 (that is, on the gap a side). After the magnet 13 is placed, the holding member 17 is arranged so as to cover the outer peripheral inclined surface of the magnet 13 on the central step portion 16a side, and the arranged holding member 17 is fixed to the base plate 16 with a bolt 18 (see (b)).
In the rotor manufacturing method described here, the electromagnetic steel plate 15a is wound around the collar 14 to form the spiral steel plate 15. However, a winding jig (not shown) may be used instead of the collar 14. . After winding the electromagnetic steel sheet 15a, the collar 14 is incorporated into the base plate 16 as it is, but the winding jig is removed.

12 shows a manufacturing method (part 2) in the separate bridge structure of the rotor of FIG. 1, (a) is a perspective view of the base plate, and (b) is a cross-sectional explanatory view similar to FIG. In the figure, the inner diameter of the recess-shaped space b opening (gap a side) of the base plate outer peripheral wall 24b is Ro1, and the inner diameter of the base of the base plate outer peripheral wall 24b (spiral steel plate 15 storage part) is Ro2.
As shown in FIG. 12, when manufacturing the rotor 10 having a separate bridge portion structure, first, the electromagnetic steel sheet 15a through the hole 19 (see (a)) provided in the base plate 24 is attached to the collar 22 having a retaining structure. Attach to. Next, the collar 22 is rotated in the electromagnetic steel sheet winding direction, and the electromagnetic steel sheet 15a is wound up to the outer diameter of the spiral steel sheet 15, that is, the inner diameter Ro2. When the winding of the spiral steel plate 15 is completed, the spiral steel plate 15 is formed in the base plate 16 (see (b)).

Next, the bonded magnet 23 is inserted so as to be deformed and pushed in from the recessed space b opening (gap a side) above the spiral steel plate 15 and placed (see (b)).
FIGS. 13A and 13B show a manufacturing method in the bridge portion integrated structure of the rotor of FIG. 1, wherein FIG. 13A is a perspective view of a base plate, and FIG. 13B is a cross-sectional explanatory view similar to FIG. FIG. 14 is an explanatory diagram of the beginning of winding of the electromagnetic steel sheet in the bridge portion integrated structure of the rotor. FIG. 15 is an explanatory view of the end of winding of the magnetic steel sheet in the bridge portion integrated structure of the rotor. In FIG. 13, the inner diameter of the recess-shaped space b opening (gap a side) of the base plate outer peripheral wall 24b is Ro1, and the inner diameter of the base of the base plate outer peripheral wall 24b (spiral steel plate 15 storage part) is Ro2.

The base plate 26 used in the bridge portion integrated structure of the rotor has a central step portion 26a and an outer peripheral wall 26b, and a groove (opening) 27 is formed by cutting out the outer peripheral wall 26b instead of the hole 19. Other configurations and operations are the same as those of the base plate 16. Further, the collar 28 used in the bridge portion integrated structure of the rotor has a structure in which the collar 14 and the holding member 17 (see FIG. 1) are integrated, and is fixed to the base plate 26 by bolts 18.
When manufacturing the rotor 10 having the bridge portion integrated structure, the electromagnetic steel sheet 15a is previously wound around the collar 28 until the position of the wound electromagnetic steel sheet 15a reaches the inner diameter Ro1.

Next, as shown in FIG. 14, the collar 28 in which the electromagnetic steel sheet 15a is wound to the position of the inner diameter Ro1 is inserted from the gap a side into a space surrounded by the central step portion 26a and the outer peripheral wall 26b and opened on the gap a side. And placed on the base plate 25. At this time, the electromagnetic steel plate 15 a being wound is positioned in the groove 27.
Next, as shown in FIG. 15, the collar 28 is rotated in the winding direction of the electromagnetic steel sheet (see the arrow in the figure), and the electromagnetic steel sheet 15a is moved from the inner diameter Ro1 to the outer diameter of the spiral steel sheet 15, that is, the inner diameter. Wind up to Ro2. When the winding of the spiral steel plate 15 is completed, the spiral steel plate 15 is disposed in the base plate 26.

Next, the bonded magnet 23 is inserted and placed above the spiral steel plate 15 (that is, on the gap a side). After the bond magnet 23 is placed, the collar 28 is fixed to the base plate 26 with bolts 18 (see FIG. 13B).
As described above, in the case of the bridge unit integrated structure, the groove 27 has a planar shape on the outer peripheral wall 26b of the base plate 26, a line segment based on a value (Roi + tr) obtained by adding the steel plate thickness tr to the inner diameter Roi of the outer peripheral wall 26b, and the outer periphery. It is determined from a line segment based on a value (Roi-tr) obtained by dividing the steel plate thickness tr from the inner diameter Roi of the wall 26b, and the rotor rotation axis direction has a length for securing the back yoke thickness.

  As a result, the electromagnetic steel sheet 15a can be wound outside up to the inner diameter of the outer peripheral wall 26b of the base plate 26. Therefore, in the case of the bridge unit integrated structure, it is necessary to open up to the side surface of the gap a. If only winding is performed, the opening of the groove 27 can be reduced. By reducing the opening, the strength of the base plate 16 can be increased.

  Thus, the rotor of the rotating electrical machine according to the present invention is a rotor of the rotating electrical machine disposed with a gap between the stator and a spirally wound steel sheet in which a magnetic steel sheet is wound in a spiral shape, and on the gap side. A concave portion that opens and stores the spiral steel plate and a magnet disposed on the spiral steel plate, an opening portion that communicates with the concave portion and passes the electromagnetic steel plate, and a drop prevention portion that prevents the magnet from falling off the concave portion. And having a base plate.

Further, in the rotor of the rotating electrical machine according to one embodiment of the present invention, the opening has a planar shape in the outer peripheral wall of the base plate having a value obtained by adding the steel plate thickness to the inner radius of the reinforcing member that winds the electromagnetic steel plate. It is determined from the line segment based on this and the line segment based on the value obtained by dividing the steel plate thickness from the inner diameter of the outer peripheral wall of the base plate, and the rotor rotation axis direction preferably has a length that ensures the back yoke thickness.
In the rotor of the rotating electrical machine according to one embodiment of the present invention, it is preferable that the electromagnetic steel plate has a bridge portion formed between an outer periphery of the spiral steel plate and a slot of the stator.

Moreover, in the rotor of the rotating electrical machine according to another embodiment of the present invention, the drop-off prevention portion is located on the outer peripheral side of the magnet disposed on the base plate, and a locking portion that covers the magnet from the opening side of the recess. It is preferable that the magnet is composed of a holding member that is disposed on the inner peripheral side of the magnet and covers the magnet from the opening side of the recess.
In the rotor of the rotating electrical machine according to another embodiment of the present invention, it is preferable that the electromagnetic steel plate is held and held by a locking portion that opens to the outer surface side of the reinforcing member.

  The method of manufacturing a rotor of a rotating electrical machine according to the present invention includes a process of mounting a reinforcing member or a winding jig for winding the electromagnetic steel sheet on the base plate when manufacturing the rotor of the rotating electrical machine according to the present invention. A process of attaching and fixing the electromagnetic steel sheet inserted from the opening of the base plate to the reinforcing member or the winding jig; and the reinforcing member or the winding jig fixed to the electromagnetic steel sheet. The electromagnetic steel sheet is wound by rotating in the winding direction, and the spiral steel sheet is formed.

In the method of manufacturing a rotor for a rotating electrical machine according to an embodiment of the present invention, the reinforcing member or the winding jig may be provided by a guide roller having an outer diameter larger than the inner diameter of the base plate when the electromagnetic steel sheet is wound. It is preferable to feed the electromagnetic steel sheet to the front.
Further, in the method of manufacturing a rotor for a rotating electrical machine according to another embodiment of the present invention, when the electromagnetic steel sheet is wound around the reinforcing member, the base plate is rotated in the electromagnetic steel sheet winding direction according to the winding amount. And it is preferable to move the said guide roller and to always position the said electromagnetic steel plate wound up in a tangential direction.

In the method of manufacturing a rotor for a rotating electrical machine according to another embodiment of the present invention, when the electromagnetic steel sheet is wound around the reinforcing member, the electromagnetic force is wound by moving the guide roller according to the winding amount. It is preferable that the steel plate is always positioned in the tangential direction.
In the method of manufacturing a rotor for a rotating electrical machine according to another embodiment of the present invention, when the magnet is disposed in the recess, the outer peripheral side of the base plate whose outer diameter is reduced from the inner diameter of the recess. After being positioned on the lower surface side of the upper end portion and covered from the opening side by the upper end portion of the outer peripheral wall, the inner peripheral side of the magnet is attached and fixed to the base plate and covered from the opening side by the holding member. It is preferable to prevent the magnet from falling off.

  Also, in the method of manufacturing a rotor for a rotating electrical machine according to another embodiment of the present invention, the base plate having a diameter smaller than the inner diameter of the recess when the magnet is a deformable bond magnet and the magnet is disposed in the recess. It is preferable to prevent the magnet from falling off by pushing the bond magnet into a space formed by an upper end of the outer peripheral wall and a reinforcing member having a magnet holding function attached and fixed to the base plate.

It is a section explanatory view of the rotor of the rotation electrical machinery concerning one embodiment of this invention. It is a perspective view which shows the external appearance shape of the base plate of FIG. It is explanatory drawing of the winding start of the electromagnetic steel plate of FIG. It is explanatory drawing of the shape of the hole opened in the base plate of FIG. It is explanatory drawing which shows the attachment state to the color | collar of the electromagnetic steel plate of FIG. It is explanatory drawing of the winding end of the electromagnetic steel plate of FIG. It is explanatory drawing similar to FIG. 3 by the other winding method of an electromagnetic steel plate. It is explanatory drawing similar to FIG. 6 by the other winding method of an electromagnetic steel plate. It is sectional explanatory drawing of the method (the 1) which fixes a magnet to a baseplate. The method (the 2) which fixes a magnet to a baseplate is shown, (a) is sectional explanatory drawing after spiral steel plate mounting | wearing, (b) is sectional explanatory drawing after magnet mounting | wearing. A manufacturing method (part 1) in the separate bridge structure of the rotor of FIG. 1 is shown, (a) is a perspective view of a base plate, and (b) is a sectional explanatory view similar to FIG. FIGS. 2A and 2B show a manufacturing method (part 2) in the separate bridge structure of the rotor of FIG. 1, in which FIG. 1A is a perspective view of a base plate, and FIG. The manufacturing method in the bridge part integrated structure of the rotor of FIG. 1 is shown, (a) is a perspective view of a base plate, (b) is sectional explanatory drawing similar to FIG. It is explanatory drawing of the winding start of the electromagnetic steel plate in the bridge part integrated structure of a rotor. It is explanatory drawing of the winding end of the electromagnetic steel plate in the bridge part integrated structure of a rotor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotor 11 Rotor rotating shaft 12 Stator 13 Magnet 14, 22, 28 Collar 14a Slit 15 Spiral steel plate 15a Electrical steel plate 16, 24, 26 Base plate 16a, 24a, 26a Central step part 16b, 24b, 26b Outer wall 17 Holding member 18 Bolt 19 hole 20 guide hole 21 guide roller 22a inclined surface 22b locking step 23 bond magnet 25 locking projection 27 groove a gap b recessed space c, d space Ro1, Ro2 inner diameter

Claims (11)

In the rotor of the rotating electrical machine arranged with a gap between the stator,
A spiral steel sheet in which a magnetic steel sheet is spirally wound;
A concave portion that opens to the gap side and stores the spiral steel plate and a magnet disposed on the spiral steel plate, an opening portion that communicates with the concave portion and passes the electromagnetic steel plate, and prevents the magnet from falling off the concave portion. And a base plate provided with a drop-off prevention portion. The opening is
The plane shape of the outer peripheral wall of the base plate is based on a line segment based on a value obtained by adding the steel plate thickness to the inner radius of the reinforcing member that winds the electromagnetic steel plate, and a line based on a value obtained by dividing the steel plate thickness from the inner peripheral wall inner diameter of the base plate. The rotor of a rotating electrical machine according to claim 1, wherein the rotor rotating shaft direction has a length that secures a back yoke thickness. The electrical steel sheet is
The rotor for a rotating electrical machine according to claim 1, further comprising a bridge portion formed between an outer periphery of the spiral steel plate and a slot of the stator. The drop-off prevention part is
An engaging portion that is located on the outer peripheral side of the magnet disposed on the base plate and covers the magnet from the opening side of the concave portion, and that is disposed on the inner peripheral side of the magnet and covers the magnet from the opening side of the concave portion. The rotor of the rotating electrical machine according to any one of claims 1 to 3, wherein the rotor is constituted by a holding member.   5. The rotor of a rotating electrical machine according to claim 1, wherein the electromagnetic steel sheet is held by a locking portion that opens to an outer surface side of the reinforcing member. When manufacturing the rotor of the rotating electrical machine according to any one of claims 1 to 5,
A process of attaching a reinforcing member or a winding jig for winding the electromagnetic steel sheet to the base plate;
A process of attaching and fixing the electromagnetic steel sheet inserted from the opening of the base plate to the reinforcing member or the winding jig;
The reinforcing member to which the electromagnetic steel sheet is fixed or the winding jig is rotated in the electromagnetic steel sheet winding direction to wind the electromagnetic steel sheet to form the spiral steel sheet. A method for manufacturing a rotor of a rotating electrical machine.   7. The electromagnetic steel sheet according to claim 6, wherein when the electromagnetic steel sheet is wound, the electromagnetic steel sheet is sent out to the reinforcing member or the winding jig by a guide roller having an outer diameter larger than an inner diameter of the base plate. A method for manufacturing a rotor of a rotating electrical machine.   When winding the electromagnetic steel sheet around the reinforcing member, according to the winding amount, rotate the base plate in the electromagnetic steel sheet winding direction, move the guide roller, and always wind the electromagnetic steel sheet to be wound up, The method for manufacturing a rotor of a rotating electric machine according to claim 6, wherein the rotor is positioned in a tangential direction.   When winding the electromagnetic steel sheet around the reinforcing member, the guide roller is moved according to a winding amount, and the electromagnetic steel sheet to be wound is always positioned in a tangential direction. The manufacturing method of the rotor of the described rotating electrical machine.   When the magnet is disposed in the recess, the outer peripheral side of the magnet is positioned on the lower surface side of the upper end portion of the outer peripheral wall of the base plate that is reduced in diameter from the inner diameter of the recess, and is covered from the opening side by the upper end portion of the outer peripheral wall. 10. The magnet according to claim 6, wherein an inner peripheral side of the magnet is attached and fixed to the base plate and covered from the opening side by the holding member to prevent the magnet from falling off. The manufacturing method of the rotor of the rotary electric machine as described in any one. The magnet is a deformable bond magnet,
When arranging the magnet in the recess, in the space formed by the upper end portion of the outer peripheral wall of the base plate that is reduced in diameter from the inner diameter of the recess, and a reinforcing member having a magnet holding function attached and fixed to the base plate, The method for manufacturing a rotor of a rotating electrical machine according to any one of claims 6 to 9, wherein the magnet is prevented from falling off by pressing the bond magnet.

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